drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.20"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <asm/uaccess.h>
  72
  73 #include <linux/dmi.h>
  74 #include <linux/jiffies.h>
  75 #include <linux/workqueue.h>
  76
  77 #include <acpi/acpi_drivers.h>
  78 #include <acpi/acnamesp.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125
 126 /****************************************************************************
 127  * Main driver
 128  */
 129
 130 #define TPACPI_NAME "thinkpad"
 131 #define TPACPI_DESC "ThinkPad ACPI Extras"
 132 #define TPACPI_FILE TPACPI_NAME "_acpi"
 133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 135
 136 #define TPACPI_PROC_DIR "ibm"
 137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 138 #define TPACPI_DRVR_NAME TPACPI_FILE
 139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 141
 142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 143 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 144
 145 #define TPACPI_MAX_ACPI_ARGS 3
 146
 147 /* Debugging */
 148 #define TPACPI_LOG TPACPI_FILE ": "
 149 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 150 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 151 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 152 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 153
 154 #define TPACPI_DBG_ALL          0xffff
 155 #define TPACPI_DBG_ALL          0xffff
 156 #define TPACPI_DBG_INIT         0x0001
 157 #define TPACPI_DBG_EXIT         0x0002
 158 #define dbg_printk(a_dbg_level, format, arg...) \
 159         do { if (dbg_level & a_dbg_level) \
 160                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 161         } while (0)
 162 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 163 #define vdbg_printk(a_dbg_level, format, arg...) \
 164         dbg_printk(a_dbg_level, format, ## arg)
 165 static const char *str_supported(int is_supported);
 166 #else
 167 #define vdbg_printk(a_dbg_level, format, arg...)
 168 #endif
 169
 170 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 171 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 172 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 173
 174
 175 /****************************************************************************
 176  * Driver-wide structs and misc. variables
 177  */
 178
 179 struct ibm_struct;
 180
 181 struct tp_acpi_drv_struct {
 182         const struct acpi_device_id *hid;
 183         struct acpi_driver *driver;
 184
 185         void (*notify) (struct ibm_struct *, u32);
 186         acpi_handle *handle;
 187         u32 type;
 188         struct acpi_device *device;
 189 };
 190
 191 struct ibm_struct {
 192         char *name;
 193
 194         int (*read) (char *);
 195         int (*write) (char *);
 196         void (*exit) (void);
 197         void (*resume) (void);
 198         void (*suspend) (pm_message_t state);
 199
 200         struct list_head all_drivers;
 201
 202         struct tp_acpi_drv_struct *acpi;
 203
 204         struct {
 205                 u8 acpi_driver_registered:1;
 206                 u8 acpi_notify_installed:1;
 207                 u8 proc_created:1;
 208                 u8 init_called:1;
 209                 u8 experimental:1;
 210         } flags;
 211 };
 212
 213 struct ibm_init_struct {
 214         char param[32];
 215
 216         int (*init) (struct ibm_init_struct *);
 217         struct ibm_struct *data;
 218 };
 219
 220 static struct {
 221 #ifdef CONFIG_THINKPAD_ACPI_BAY
 222         u32 bay_status:1;
 223         u32 bay_eject:1;
 224         u32 bay_status2:1;
 225         u32 bay_eject2:1;
 226 #endif
 227         u32 bluetooth:1;
 228         u32 hotkey:1;
 229         u32 hotkey_mask:1;
 230         u32 hotkey_wlsw:1;
 231         u32 hotkey_tablet:1;
 232         u32 light:1;
 233         u32 light_status:1;
 234         u32 bright_16levels:1;
 235         u32 bright_acpimode:1;
 236         u32 wan:1;
 237         u32 fan_ctrl_status_undef:1;
 238         u32 input_device_registered:1;
 239         u32 platform_drv_registered:1;
 240         u32 platform_drv_attrs_registered:1;
 241         u32 sensors_pdrv_registered:1;
 242         u32 sensors_pdrv_attrs_registered:1;
 243         u32 sensors_pdev_attrs_registered:1;
 244         u32 hotkey_poll_active:1;
 245 } tp_features;
 246
 247 static struct {
 248         u16 hotkey_mask_ff:1;
 249         u16 bright_cmos_ec_unsync:1;
 250 } tp_warned;
 251
 252 struct thinkpad_id_data {
 253         unsigned int vendor;    /* ThinkPad vendor:
 254                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 255
 256         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 257         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 258
 259         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 260         u16 ec_model;
 261
 262         char *model_str;        /* ThinkPad T43 */
 263         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 264 };
 265 static struct thinkpad_id_data thinkpad_id;
 266
 267 static enum {
 268         TPACPI_LIFE_INIT = 0,
 269         TPACPI_LIFE_RUNNING,
 270         TPACPI_LIFE_EXITING,
 271 } tpacpi_lifecycle;
 272
 273 static int experimental;
 274 static u32 dbg_level;
 275
 276 static struct workqueue_struct *tpacpi_wq;
 277
 278 /* Special LED class that can defer work */
 279 struct tpacpi_led_classdev {
 280         struct led_classdev led_classdev;
 281         struct work_struct work;
 282         enum led_brightness new_brightness;
 283         unsigned int led;
 284 };
 285
 286 /****************************************************************************
 287  ****************************************************************************
 288  *
 289  * ACPI Helpers and device model
 290  *
 291  ****************************************************************************
 292  ****************************************************************************/
 293
 294 /*************************************************************************
 295  * ACPI basic handles
 296  */
 297
 298 static acpi_handle root_handle;
 299
 300 #define TPACPI_HANDLE(object, parent, paths...)                 \
 301         static acpi_handle  object##_handle;                    \
 302         static acpi_handle *object##_parent = &parent##_handle; \
 303         static char        *object##_path;                      \
 304         static char        *object##_paths[] = { paths }
 305
 306 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 307            "\\_SB.PCI.ISA.EC",  /* 570 */
 308            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 309            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 310            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 311            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 312            "\\_SB.PCI0.LPC.EC", /* all others */
 313            );
 314
 315 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 316 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 317
 318 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 319                                         /* T4x, X31, X40 */
 320            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 321            "\\CMS",             /* R40, R40e */
 322            );                   /* all others */
 323
 324 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 325            "^HKEY",             /* R30, R31 */
 326            "HKEY",              /* all others */
 327            );                   /* 570 */
 328
 329 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 330            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 331            "\\_SB.PCI0.VID0",   /* 770e */
 332            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 333            "\\_SB.PCI0.AGP.VID",        /* all others */
 334            );                           /* R30, R31 */
 335
 336
 337 /*************************************************************************
 338  * ACPI helpers
 339  */
 340
 341 static int acpi_evalf(acpi_handle handle,
 342                       void *res, char *method, char *fmt, ...)
 343 {
 344         char *fmt0 = fmt;
 345         struct acpi_object_list params;
 346         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 347         struct acpi_buffer result, *resultp;
 348         union acpi_object out_obj;
 349         acpi_status status;
 350         va_list ap;
 351         char res_type;
 352         int success;
 353         int quiet;
 354
 355         if (!*fmt) {
 356                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 357                 return 0;
 358         }
 359
 360         if (*fmt == 'q') {
 361                 quiet = 1;
 362                 fmt++;
 363         } else
 364                 quiet = 0;
 365
 366         res_type = *(fmt++);
 367
 368         params.count = 0;
 369         params.pointer = &in_objs[0];
 370
 371         va_start(ap, fmt);
 372         while (*fmt) {
 373                 char c = *(fmt++);
 374                 switch (c) {
 375                 case 'd':       /* int */
 376                         in_objs[params.count].integer.value = va_arg(ap, int);
 377                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 378                         break;
 379                         /* add more types as needed */
 380                 default:
 381                         printk(TPACPI_ERR "acpi_evalf() called "
 382                                "with invalid format character '%c'\n", c);
 383                         return 0;
 384                 }
 385         }
 386         va_end(ap);
 387
 388         if (res_type != 'v') {
 389                 result.length = sizeof(out_obj);
 390                 result.pointer = &out_obj;
 391                 resultp = &result;
 392         } else
 393                 resultp = NULL;
 394
 395         status = acpi_evaluate_object(handle, method, &params, resultp);
 396
 397         switch (res_type) {
 398         case 'd':               /* int */
 399                 if (res)
 400                         *(int *)res = out_obj.integer.value;
 401                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 402                 break;
 403         case 'v':               /* void */
 404                 success = status == AE_OK;
 405                 break;
 406                 /* add more types as needed */
 407         default:
 408                 printk(TPACPI_ERR "acpi_evalf() called "
 409                        "with invalid format character '%c'\n", res_type);
 410                 return 0;
 411         }
 412
 413         if (!success && !quiet)
 414                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 415                        method, fmt0, status);
 416
 417         return success;
 418 }
 419
 420 static int acpi_ec_read(int i, u8 *p)
 421 {
 422         int v;
 423
 424         if (ecrd_handle) {
 425                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 426                         return 0;
 427                 *p = v;
 428         } else {
 429                 if (ec_read(i, p) < 0)
 430                         return 0;
 431         }
 432
 433         return 1;
 434 }
 435
 436 static int acpi_ec_write(int i, u8 v)
 437 {
 438         if (ecwr_handle) {
 439                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 440                         return 0;
 441         } else {
 442                 if (ec_write(i, v) < 0)
 443                         return 0;
 444         }
 445
 446         return 1;
 447 }
 448
 449 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 450 static int _sta(acpi_handle handle)
 451 {
 452         int status;
 453
 454         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 455                 status = 0;
 456
 457         return status;
 458 }
 459 #endif
 460
 461 static int issue_thinkpad_cmos_command(int cmos_cmd)
 462 {
 463         if (!cmos_handle)
 464                 return -ENXIO;
 465
 466         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 467                 return -EIO;
 468
 469         return 0;
 470 }
 471
 472 /*************************************************************************
 473  * ACPI device model
 474  */
 475
 476 #define TPACPI_ACPIHANDLE_INIT(object) \
 477         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 478                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 479
 480 static void drv_acpi_handle_init(char *name,
 481                            acpi_handle *handle, acpi_handle parent,
 482                            char **paths, int num_paths, char **path)
 483 {
 484         int i;
 485         acpi_status status;
 486
 487         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 488                 name);
 489
 490         for (i = 0; i < num_paths; i++) {
 491                 status = acpi_get_handle(parent, paths[i], handle);
 492                 if (ACPI_SUCCESS(status)) {
 493                         *path = paths[i];
 494                         dbg_printk(TPACPI_DBG_INIT,
 495                                    "Found ACPI handle %s for %s\n",
 496                                    *path, name);
 497                         return;
 498                 }
 499         }
 500
 501         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 502                     name);
 503         *handle = NULL;
 504 }
 505
 506 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 507 {
 508         struct ibm_struct *ibm = data;
 509
 510         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 511                 return;
 512
 513         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 514                 return;
 515
 516         ibm->acpi->notify(ibm, event);
 517 }
 518
 519 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 520 {
 521         acpi_status status;
 522         int rc;
 523
 524         BUG_ON(!ibm->acpi);
 525
 526         if (!*ibm->acpi->handle)
 527                 return 0;
 528
 529         vdbg_printk(TPACPI_DBG_INIT,
 530                 "setting up ACPI notify for %s\n", ibm->name);
 531
 532         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 533         if (rc < 0) {
 534                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 535                         ibm->name, rc);
 536                 return -ENODEV;
 537         }
 538
 539         acpi_driver_data(ibm->acpi->device) = ibm;
 540         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 541                 TPACPI_ACPI_EVENT_PREFIX,
 542                 ibm->name);
 543
 544         status = acpi_install_notify_handler(*ibm->acpi->handle,
 545                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 546         if (ACPI_FAILURE(status)) {
 547                 if (status == AE_ALREADY_EXISTS) {
 548                         printk(TPACPI_NOTICE
 549                                "another device driver is already "
 550                                "handling %s events\n", ibm->name);
 551                 } else {
 552                         printk(TPACPI_ERR
 553                                "acpi_install_notify_handler(%s) failed: %d\n",
 554                                ibm->name, status);
 555                 }
 556                 return -ENODEV;
 557         }
 558         ibm->flags.acpi_notify_installed = 1;
 559         return 0;
 560 }
 561
 562 static int __init tpacpi_device_add(struct acpi_device *device)
 563 {
 564         return 0;
 565 }
 566
 567 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 568 {
 569         int rc;
 570
 571         dbg_printk(TPACPI_DBG_INIT,
 572                 "registering %s as an ACPI driver\n", ibm->name);
 573
 574         BUG_ON(!ibm->acpi);
 575
 576         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 577         if (!ibm->acpi->driver) {
 578                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 579                 return -ENOMEM;
 580         }
 581
 582         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 583         ibm->acpi->driver->ids = ibm->acpi->hid;
 584
 585         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 586
 587         rc = acpi_bus_register_driver(ibm->acpi->driver);
 588         if (rc < 0) {
 589                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 590                        ibm->name, rc);
 591                 kfree(ibm->acpi->driver);
 592                 ibm->acpi->driver = NULL;
 593         } else if (!rc)
 594                 ibm->flags.acpi_driver_registered = 1;
 595
 596         return rc;
 597 }
 598
 599
 600 /****************************************************************************
 601  ****************************************************************************
 602  *
 603  * Procfs Helpers
 604  *
 605  ****************************************************************************
 606  ****************************************************************************/
 607
 608 static int dispatch_procfs_read(char *page, char **start, off_t off,
 609                         int count, int *eof, void *data)
 610 {
 611         struct ibm_struct *ibm = data;
 612         int len;
 613
 614         if (!ibm || !ibm->read)
 615                 return -EINVAL;
 616
 617         len = ibm->read(page);
 618         if (len < 0)
 619                 return len;
 620
 621         if (len <= off + count)
 622                 *eof = 1;
 623         *start = page + off;
 624         len -= off;
 625         if (len > count)
 626                 len = count;
 627         if (len < 0)
 628                 len = 0;
 629
 630         return len;
 631 }
 632
 633 static int dispatch_procfs_write(struct file *file,
 634                         const char __user *userbuf,
 635                         unsigned long count, void *data)
 636 {
 637         struct ibm_struct *ibm = data;
 638         char *kernbuf;
 639         int ret;
 640
 641         if (!ibm || !ibm->write)
 642                 return -EINVAL;
 643
 644         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 645         if (!kernbuf)
 646                 return -ENOMEM;
 647
 648         if (copy_from_user(kernbuf, userbuf, count)) {
 649                 kfree(kernbuf);
 650                 return -EFAULT;
 651         }
 652
 653         kernbuf[count] = 0;
 654         strcat(kernbuf, ",");
 655         ret = ibm->write(kernbuf);
 656         if (ret == 0)
 657                 ret = count;
 658
 659         kfree(kernbuf);
 660
 661         return ret;
 662 }
 663
 664 static char *next_cmd(char **cmds)
 665 {
 666         char *start = *cmds;
 667         char *end;
 668
 669         while ((end = strchr(start, ',')) && end == start)
 670                 start = end + 1;
 671
 672         if (!end)
 673                 return NULL;
 674
 675         *end = 0;
 676         *cmds = end + 1;
 677         return start;
 678 }
 679
 680
 681 /****************************************************************************
 682  ****************************************************************************
 683  *
 684  * Device model: input, hwmon and platform
 685  *
 686  ****************************************************************************
 687  ****************************************************************************/
 688
 689 static struct platform_device *tpacpi_pdev;
 690 static struct platform_device *tpacpi_sensors_pdev;
 691 static struct device *tpacpi_hwmon;
 692 static struct input_dev *tpacpi_inputdev;
 693 static struct mutex tpacpi_inputdev_send_mutex;
 694 static LIST_HEAD(tpacpi_all_drivers);
 695
 696 static int tpacpi_suspend_handler(struct platform_device *pdev,
 697                                   pm_message_t state)
 698 {
 699         struct ibm_struct *ibm, *itmp;
 700
 701         list_for_each_entry_safe(ibm, itmp,
 702                                  &tpacpi_all_drivers,
 703                                  all_drivers) {
 704                 if (ibm->suspend)
 705                         (ibm->suspend)(state);
 706         }
 707
 708         return 0;
 709 }
 710
 711 static int tpacpi_resume_handler(struct platform_device *pdev)
 712 {
 713         struct ibm_struct *ibm, *itmp;
 714
 715         list_for_each_entry_safe(ibm, itmp,
 716                                  &tpacpi_all_drivers,
 717                                  all_drivers) {
 718                 if (ibm->resume)
 719                         (ibm->resume)();
 720         }
 721
 722         return 0;
 723 }
 724
 725 static struct platform_driver tpacpi_pdriver = {
 726         .driver = {
 727                 .name = TPACPI_DRVR_NAME,
 728                 .owner = THIS_MODULE,
 729         },
 730         .suspend = tpacpi_suspend_handler,
 731         .resume = tpacpi_resume_handler,
 732 };
 733
 734 static struct platform_driver tpacpi_hwmon_pdriver = {
 735         .driver = {
 736                 .name = TPACPI_HWMON_DRVR_NAME,
 737                 .owner = THIS_MODULE,
 738         },
 739 };
 740
 741 /*************************************************************************
 742  * sysfs support helpers
 743  */
 744
 745 struct attribute_set {
 746         unsigned int members, max_members;
 747         struct attribute_group group;
 748 };
 749
 750 struct attribute_set_obj {
 751         struct attribute_set s;
 752         struct attribute *a;
 753 } __attribute__((packed));
 754
 755 static struct attribute_set *create_attr_set(unsigned int max_members,
 756                                                 const char *name)
 757 {
 758         struct attribute_set_obj *sobj;
 759
 760         if (max_members == 0)
 761                 return NULL;
 762
 763         /* Allocates space for implicit NULL at the end too */
 764         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 765                     max_members * sizeof(struct attribute *),
 766                     GFP_KERNEL);
 767         if (!sobj)
 768                 return NULL;
 769         sobj->s.max_members = max_members;
 770         sobj->s.group.attrs = &sobj->a;
 771         sobj->s.group.name = name;
 772
 773         return &sobj->s;
 774 }
 775
 776 #define destroy_attr_set(_set) \
 777         kfree(_set);
 778
 779 /* not multi-threaded safe, use it in a single thread per set */
 780 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 781 {
 782         if (!s || !attr)
 783                 return -EINVAL;
 784
 785         if (s->members >= s->max_members)
 786                 return -ENOMEM;
 787
 788         s->group.attrs[s->members] = attr;
 789         s->members++;
 790
 791         return 0;
 792 }
 793
 794 static int add_many_to_attr_set(struct attribute_set *s,
 795                         struct attribute **attr,
 796                         unsigned int count)
 797 {
 798         int i, res;
 799
 800         for (i = 0; i < count; i++) {
 801                 res = add_to_attr_set(s, attr[i]);
 802                 if (res)
 803                         return res;
 804         }
 805
 806         return 0;
 807 }
 808
 809 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 810 {
 811         sysfs_remove_group(kobj, &s->group);
 812         destroy_attr_set(s);
 813 }
 814
 815 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 816         sysfs_create_group(_kobj, &_attr_set->group)
 817
 818 static int parse_strtoul(const char *buf,
 819                 unsigned long max, unsigned long *value)
 820 {
 821         char *endp;
 822
 823         while (*buf && isspace(*buf))
 824                 buf++;
 825         *value = simple_strtoul(buf, &endp, 0);
 826         while (*endp && isspace(*endp))
 827                 endp++;
 828         if (*endp || *value > max)
 829                 return -EINVAL;
 830
 831         return 0;
 832 }
 833
 834 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 835 {
 836         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 837         union acpi_object *obj;
 838         int rc;
 839
 840         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 841                 obj = (union acpi_object *)buffer.pointer;
 842                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 843                         printk(TPACPI_ERR "Unknown _BCL data, "
 844                                "please report this to %s\n", TPACPI_MAIL);
 845                         rc = 0;
 846                 } else {
 847                         rc = obj->package.count;
 848                 }
 849         } else {
 850                 return 0;
 851         }
 852
 853         kfree(buffer.pointer);
 854         return rc;
 855 }
 856
 857 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 858                                         u32 lvl, void *context, void **rv)
 859 {
 860         char name[ACPI_PATH_SEGMENT_LENGTH];
 861         struct acpi_buffer buffer = { sizeof(name), &name };
 862
 863         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 864             !strncmp("_BCL", name, sizeof(name) - 1)) {
 865                 BUG_ON(!rv || !*rv);
 866                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 867                 return AE_CTRL_TERMINATE;
 868         } else {
 869                 return AE_OK;
 870         }
 871 }
 872
 873 /*
 874  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 875  */
 876 static int __init tpacpi_check_std_acpi_brightness_support(void)
 877 {
 878         int status;
 879         int bcl_levels = 0;
 880         void *bcl_ptr = &bcl_levels;
 881
 882         if (!vid_handle) {
 883                 TPACPI_ACPIHANDLE_INIT(vid);
 884         }
 885         if (!vid_handle)
 886                 return 0;
 887
 888         /*
 889          * Search for a _BCL method, and execute it.  This is safe on all
 890          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 891          * BIOS in ACPI backlight control mode.  We do NOT have to care
 892          * about calling the _BCL method in an enabled video device, any
 893          * will do for our purposes.
 894          */
 895
 896         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 897                                      tpacpi_acpi_walk_find_bcl, NULL,
 898                                      &bcl_ptr);
 899
 900         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 901                 tp_features.bright_acpimode = 1;
 902                 return (bcl_levels - 2);
 903         }
 904
 905         return 0;
 906 }
 907
 908 /*************************************************************************
 909  * thinkpad-acpi driver attributes
 910  */
 911
 912 /* interface_version --------------------------------------------------- */
 913 static ssize_t tpacpi_driver_interface_version_show(
 914                                 struct device_driver *drv,
 915                                 char *buf)
 916 {
 917         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 918 }
 919
 920 static DRIVER_ATTR(interface_version, S_IRUGO,
 921                 tpacpi_driver_interface_version_show, NULL);
 922
 923 /* debug_level --------------------------------------------------------- */
 924 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 925                                                 char *buf)
 926 {
 927         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 928 }
 929
 930 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 931                                                 const char *buf, size_t count)
 932 {
 933         unsigned long t;
 934
 935         if (parse_strtoul(buf, 0xffff, &t))
 936                 return -EINVAL;
 937
 938         dbg_level = t;
 939
 940         return count;
 941 }
 942
 943 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 944                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 945
 946 /* version ------------------------------------------------------------- */
 947 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 948                                                 char *buf)
 949 {
 950         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 951                         TPACPI_DESC, TPACPI_VERSION);
 952 }
 953
 954 static DRIVER_ATTR(version, S_IRUGO,
 955                 tpacpi_driver_version_show, NULL);
 956
 957 /* --------------------------------------------------------------------- */
 958
 959 static struct driver_attribute *tpacpi_driver_attributes[] = {
 960         &driver_attr_debug_level, &driver_attr_version,
 961         &driver_attr_interface_version,
 962 };
 963
 964 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 965 {
 966         int i, res;
 967
 968         i = 0;
 969         res = 0;
 970         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 971                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 972                 i++;
 973         }
 974
 975         return res;
 976 }
 977
 978 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 979 {
 980         int i;
 981
 982         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 983                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 984 }
 985
 986 /****************************************************************************
 987  ****************************************************************************
 988  *
 989  * Subdrivers
 990  *
 991  ****************************************************************************
 992  ****************************************************************************/
 993
 994 /*************************************************************************
 995  * thinkpad-acpi init subdriver
 996  */
 997
 998 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 999 {
1000         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1001         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1002
1003         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1004                 (thinkpad_id.bios_version_str) ?
1005                         thinkpad_id.bios_version_str : "unknown",
1006                 (thinkpad_id.ec_version_str) ?
1007                         thinkpad_id.ec_version_str : "unknown");
1008
1009         if (thinkpad_id.vendor && thinkpad_id.model_str)
1010                 printk(TPACPI_INFO "%s %s, model %s\n",
1011                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1012                                 "IBM" : ((thinkpad_id.vendor ==
1013                                                 PCI_VENDOR_ID_LENOVO) ?
1014                                         "Lenovo" : "Unknown vendor"),
1015                         thinkpad_id.model_str,
1016                         (thinkpad_id.nummodel_str) ?
1017                                 thinkpad_id.nummodel_str : "unknown");
1018
1019         return 0;
1020 }
1021
1022 static int thinkpad_acpi_driver_read(char *p)
1023 {
1024         int len = 0;
1025
1026         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1027         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1028
1029         return len;
1030 }
1031
1032 static struct ibm_struct thinkpad_acpi_driver_data = {
1033         .name = "driver",
1034         .read = thinkpad_acpi_driver_read,
1035 };
1036
1037 /*************************************************************************
1038  * Hotkey subdriver
1039  */
1040
1041 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1042         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1043         TP_ACPI_HOTKEYSCAN_FNF2,
1044         TP_ACPI_HOTKEYSCAN_FNF3,
1045         TP_ACPI_HOTKEYSCAN_FNF4,
1046         TP_ACPI_HOTKEYSCAN_FNF5,
1047         TP_ACPI_HOTKEYSCAN_FNF6,
1048         TP_ACPI_HOTKEYSCAN_FNF7,
1049         TP_ACPI_HOTKEYSCAN_FNF8,
1050         TP_ACPI_HOTKEYSCAN_FNF9,
1051         TP_ACPI_HOTKEYSCAN_FNF10,
1052         TP_ACPI_HOTKEYSCAN_FNF11,
1053         TP_ACPI_HOTKEYSCAN_FNF12,
1054         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1055         TP_ACPI_HOTKEYSCAN_FNINSERT,
1056         TP_ACPI_HOTKEYSCAN_FNDELETE,
1057         TP_ACPI_HOTKEYSCAN_FNHOME,
1058         TP_ACPI_HOTKEYSCAN_FNEND,
1059         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1060         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1061         TP_ACPI_HOTKEYSCAN_FNSPACE,
1062         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1063         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1064         TP_ACPI_HOTKEYSCAN_MUTE,
1065         TP_ACPI_HOTKEYSCAN_THINKPAD,
1066 };
1067
1068 enum {  /* Keys available through NVRAM polling */
1069         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1070         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1071 };
1072
1073 enum {  /* Positions of some of the keys in hotkey masks */
1074         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1075         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1076         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1077         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1078         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1079         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1080         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1081         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1082         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1083         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1084         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1085 };
1086
1087 enum {  /* NVRAM to ACPI HKEY group map */
1088         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1089                                           TP_ACPI_HKEY_ZOOM_MASK |
1090                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1091                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1092         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1093                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1094         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1095                                           TP_ACPI_HKEY_VOLDWN_MASK |
1096                                           TP_ACPI_HKEY_MUTE_MASK,
1097 };
1098
1099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1100 struct tp_nvram_state {
1101        u16 thinkpad_toggle:1;
1102        u16 zoom_toggle:1;
1103        u16 display_toggle:1;
1104        u16 thinklight_toggle:1;
1105        u16 hibernate_toggle:1;
1106        u16 displayexp_toggle:1;
1107        u16 display_state:1;
1108        u16 brightness_toggle:1;
1109        u16 volume_toggle:1;
1110        u16 mute:1;
1111
1112        u8 brightness_level;
1113        u8 volume_level;
1114 };
1115
1116 static struct task_struct *tpacpi_hotkey_task;
1117 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1118 static int hotkey_poll_freq = 10;       /* Hz */
1119 static struct mutex hotkey_thread_mutex;
1120 static struct mutex hotkey_thread_data_mutex;
1121 static unsigned int hotkey_config_change;
1122
1123 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 #define hotkey_source_mask 0U
1126
1127 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1128
1129 static struct mutex hotkey_mutex;
1130
1131 static enum {   /* Reasons for waking up */
1132         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1133         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1134         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1135 } hotkey_wakeup_reason;
1136
1137 static int hotkey_autosleep_ack;
1138
1139 static int hotkey_orig_status;
1140 static u32 hotkey_orig_mask;
1141 static u32 hotkey_all_mask;
1142 static u32 hotkey_reserved_mask;
1143 static u32 hotkey_mask;
1144
1145 static unsigned int hotkey_report_mode;
1146
1147 static u16 *hotkey_keycode_map;
1148
1149 static struct attribute_set *hotkey_dev_attributes;
1150
1151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1152 #define HOTKEY_CONFIG_CRITICAL_START \
1153         do { \
1154                 mutex_lock(&hotkey_thread_data_mutex); \
1155                 hotkey_config_change++; \
1156         } while (0);
1157 #define HOTKEY_CONFIG_CRITICAL_END \
1158         mutex_unlock(&hotkey_thread_data_mutex);
1159 #else
1160 #define HOTKEY_CONFIG_CRITICAL_START
1161 #define HOTKEY_CONFIG_CRITICAL_END
1162 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1163
1164 /* HKEY.MHKG() return bits */
1165 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1166
1167 static int hotkey_get_wlsw(int *status)
1168 {
1169         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1170                 return -EIO;
1171         return 0;
1172 }
1173
1174 static int hotkey_get_tablet_mode(int *status)
1175 {
1176         int s;
1177
1178         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1179                 return -EIO;
1180
1181         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1182         return 0;
1183 }
1184
1185 /*
1186  * Call with hotkey_mutex held
1187  */
1188 static int hotkey_mask_get(void)
1189 {
1190         u32 m = 0;
1191
1192         if (tp_features.hotkey_mask) {
1193                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1194                         return -EIO;
1195         }
1196         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1197
1198         return 0;
1199 }
1200
1201 /*
1202  * Call with hotkey_mutex held
1203  */
1204 static int hotkey_mask_set(u32 mask)
1205 {
1206         int i;
1207         int rc = 0;
1208
1209         if (tp_features.hotkey_mask) {
1210                 if (!tp_warned.hotkey_mask_ff &&
1211                     (mask == 0xffff || mask == 0xffffff ||
1212                      mask == 0xffffffff)) {
1213                         tp_warned.hotkey_mask_ff = 1;
1214                         printk(TPACPI_NOTICE
1215                                "setting the hotkey mask to 0x%08x is likely "
1216                                "not the best way to go about it\n", mask);
1217                         printk(TPACPI_NOTICE
1218                                "please consider using the driver defaults, "
1219                                "and refer to up-to-date thinkpad-acpi "
1220                                "documentation\n");
1221                 }
1222
1223                 HOTKEY_CONFIG_CRITICAL_START
1224                 for (i = 0; i < 32; i++) {
1225                         u32 m = 1 << i;
1226                         /* enable in firmware mask only keys not in NVRAM
1227                          * mode, but enable the key in the cached hotkey_mask
1228                          * regardless of mode, or the key will end up
1229                          * disabled by hotkey_mask_get() */
1230                         if (!acpi_evalf(hkey_handle,
1231                                         NULL, "MHKM", "vdd", i + 1,
1232                                         !!((mask & ~hotkey_source_mask) & m))) {
1233                                 rc = -EIO;
1234                                 break;
1235                         } else {
1236                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1237                         }
1238                 }
1239                 HOTKEY_CONFIG_CRITICAL_END
1240
1241                 /* hotkey_mask_get must be called unconditionally below */
1242                 if (!hotkey_mask_get() && !rc &&
1243                     (hotkey_mask & ~hotkey_source_mask) !=
1244                      (mask & ~hotkey_source_mask)) {
1245                         printk(TPACPI_NOTICE
1246                                "requested hot key mask 0x%08x, but "
1247                                "firmware forced it to 0x%08x\n",
1248                                mask, hotkey_mask);
1249                 }
1250         } else {
1251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1252                 HOTKEY_CONFIG_CRITICAL_START
1253                 hotkey_mask = mask & hotkey_source_mask;
1254                 HOTKEY_CONFIG_CRITICAL_END
1255                 hotkey_mask_get();
1256                 if (hotkey_mask != mask) {
1257                         printk(TPACPI_NOTICE
1258                                "requested hot key mask 0x%08x, "
1259                                "forced to 0x%08x (NVRAM poll mask is "
1260                                "0x%08x): no firmware mask support\n",
1261                                mask, hotkey_mask, hotkey_source_mask);
1262                 }
1263 #else
1264                 hotkey_mask_get();
1265                 rc = -ENXIO;
1266 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1267         }
1268
1269         return rc;
1270 }
1271
1272 static int hotkey_status_get(int *status)
1273 {
1274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1275                 return -EIO;
1276
1277         return 0;
1278 }
1279
1280 static int hotkey_status_set(int status)
1281 {
1282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1283                 return -EIO;
1284
1285         return 0;
1286 }
1287
1288 static void tpacpi_input_send_radiosw(void)
1289 {
1290         int wlsw;
1291
1292         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1293                 mutex_lock(&tpacpi_inputdev_send_mutex);
1294
1295                 input_report_switch(tpacpi_inputdev,
1296                                     SW_RFKILL_ALL, !!wlsw);
1297                 input_sync(tpacpi_inputdev);
1298
1299                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1300         }
1301 }
1302
1303 static void tpacpi_input_send_tabletsw(void)
1304 {
1305         int state;
1306
1307         if (tp_features.hotkey_tablet &&
1308             !hotkey_get_tablet_mode(&state)) {
1309                 mutex_lock(&tpacpi_inputdev_send_mutex);
1310
1311                 input_report_switch(tpacpi_inputdev,
1312                                     SW_TABLET_MODE, !!state);
1313                 input_sync(tpacpi_inputdev);
1314
1315                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1316         }
1317 }
1318
1319 static void tpacpi_input_send_key(unsigned int scancode)
1320 {
1321         unsigned int keycode;
1322
1323         keycode = hotkey_keycode_map[scancode];
1324
1325         if (keycode != KEY_RESERVED) {
1326                 mutex_lock(&tpacpi_inputdev_send_mutex);
1327
1328                 input_report_key(tpacpi_inputdev, keycode, 1);
1329                 if (keycode == KEY_UNKNOWN)
1330                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1331                                     scancode);
1332                 input_sync(tpacpi_inputdev);
1333
1334                 input_report_key(tpacpi_inputdev, keycode, 0);
1335                 if (keycode == KEY_UNKNOWN)
1336                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1337                                     scancode);
1338                 input_sync(tpacpi_inputdev);
1339
1340                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1341         }
1342 }
1343
1344 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1345 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1346
1347 static void tpacpi_hotkey_send_key(unsigned int scancode)
1348 {
1349         tpacpi_input_send_key(scancode);
1350         if (hotkey_report_mode < 2) {
1351                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1352                                                 0x80, 0x1001 + scancode);
1353         }
1354 }
1355
1356 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1357 {
1358         u8 d;
1359
1360         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1361                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1362                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1363                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1364                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1365                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1366         }
1367         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1368                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1369                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1370         }
1371         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1372                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1373                 n->displayexp_toggle =
1374                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1375         }
1376         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1377                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1378                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1379                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1380                 n->brightness_toggle =
1381                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1382         }
1383         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1384                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1385                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1386                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1387                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1388                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1389         }
1390 }
1391
1392 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1393         do { \
1394                 if ((mask & (1 << __scancode)) && \
1395                     oldn->__member != newn->__member) \
1396                 tpacpi_hotkey_send_key(__scancode); \
1397         } while (0)
1398
1399 #define TPACPI_MAY_SEND_KEY(__scancode) \
1400         do { if (mask & (1 << __scancode)) \
1401                 tpacpi_hotkey_send_key(__scancode); } while (0)
1402
1403 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1404                                            struct tp_nvram_state *newn,
1405                                            u32 mask)
1406 {
1407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1408         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1410         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1411
1412         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1413
1414         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1415
1416         /* handle volume */
1417         if (oldn->volume_toggle != newn->volume_toggle) {
1418                 if (oldn->mute != newn->mute) {
1419                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1420                 }
1421                 if (oldn->volume_level > newn->volume_level) {
1422                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1423                 } else if (oldn->volume_level < newn->volume_level) {
1424                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1425                 } else if (oldn->mute == newn->mute) {
1426                         /* repeated key presses that didn't change state */
1427                         if (newn->mute) {
1428                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1429                         } else if (newn->volume_level != 0) {
1430                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1431                         } else {
1432                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1433                         }
1434                 }
1435         }
1436
1437         /* handle brightness */
1438         if (oldn->brightness_toggle != newn->brightness_toggle) {
1439                 if (oldn->brightness_level < newn->brightness_level) {
1440                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1441                 } else if (oldn->brightness_level > newn->brightness_level) {
1442                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1443                 } else {
1444                         /* repeated key presses that didn't change state */
1445                         if (newn->brightness_level != 0) {
1446                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1447                         } else {
1448                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1449                         }
1450                 }
1451         }
1452 }
1453
1454 #undef TPACPI_COMPARE_KEY
1455 #undef TPACPI_MAY_SEND_KEY
1456
1457 static int hotkey_kthread(void *data)
1458 {
1459         struct tp_nvram_state s[2];
1460         u32 mask;
1461         unsigned int si, so;
1462         unsigned long t;
1463         unsigned int change_detector, must_reset;
1464
1465         mutex_lock(&hotkey_thread_mutex);
1466
1467         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1468                 goto exit;
1469
1470         set_freezable();
1471
1472         so = 0;
1473         si = 1;
1474         t = 0;
1475
1476         /* Initial state for compares */
1477         mutex_lock(&hotkey_thread_data_mutex);
1478         change_detector = hotkey_config_change;
1479         mask = hotkey_source_mask & hotkey_mask;
1480         mutex_unlock(&hotkey_thread_data_mutex);
1481         hotkey_read_nvram(&s[so], mask);
1482
1483         while (!kthread_should_stop() && hotkey_poll_freq) {
1484                 if (t == 0)
1485                         t = 1000/hotkey_poll_freq;
1486                 t = msleep_interruptible(t);
1487                 if (unlikely(kthread_should_stop()))
1488                         break;
1489                 must_reset = try_to_freeze();
1490                 if (t > 0 && !must_reset)
1491                         continue;
1492
1493                 mutex_lock(&hotkey_thread_data_mutex);
1494                 if (must_reset || hotkey_config_change != change_detector) {
1495                         /* forget old state on thaw or config change */
1496                         si = so;
1497                         t = 0;
1498                         change_detector = hotkey_config_change;
1499                 }
1500                 mask = hotkey_source_mask & hotkey_mask;
1501                 mutex_unlock(&hotkey_thread_data_mutex);
1502
1503                 if (likely(mask)) {
1504                         hotkey_read_nvram(&s[si], mask);
1505                         if (likely(si != so)) {
1506                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1507                                                                 mask);
1508                         }
1509                 }
1510
1511                 so = si;
1512                 si ^= 1;
1513         }
1514
1515 exit:
1516         mutex_unlock(&hotkey_thread_mutex);
1517         return 0;
1518 }
1519
1520 static void hotkey_poll_stop_sync(void)
1521 {
1522         if (tpacpi_hotkey_task) {
1523                 if (frozen(tpacpi_hotkey_task) ||
1524                     freezing(tpacpi_hotkey_task))
1525                         thaw_process(tpacpi_hotkey_task);
1526
1527                 kthread_stop(tpacpi_hotkey_task);
1528                 tpacpi_hotkey_task = NULL;
1529                 mutex_lock(&hotkey_thread_mutex);
1530                 /* at this point, the thread did exit */
1531                 mutex_unlock(&hotkey_thread_mutex);
1532         }
1533 }
1534
1535 /* call with hotkey_mutex held */
1536 static void hotkey_poll_setup(int may_warn)
1537 {
1538         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1539             hotkey_poll_freq > 0 &&
1540             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1541                 if (!tpacpi_hotkey_task) {
1542                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1543                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1544                         if (IS_ERR(tpacpi_hotkey_task)) {
1545                                 tpacpi_hotkey_task = NULL;
1546                                 printk(TPACPI_ERR
1547                                        "could not create kernel thread "
1548                                        "for hotkey polling\n");
1549                         }
1550                 }
1551         } else {
1552                 hotkey_poll_stop_sync();
1553                 if (may_warn &&
1554                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1555                         printk(TPACPI_NOTICE
1556                                 "hot keys 0x%08x require polling, "
1557                                 "which is currently disabled\n",
1558                                 hotkey_source_mask);
1559                 }
1560         }
1561 }
1562
1563 static void hotkey_poll_setup_safe(int may_warn)
1564 {
1565         mutex_lock(&hotkey_mutex);
1566         hotkey_poll_setup(may_warn);
1567         mutex_unlock(&hotkey_mutex);
1568 }
1569
1570 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1571
1572 static void hotkey_poll_setup_safe(int __unused)
1573 {
1574 }
1575
1576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1577
1578 static int hotkey_inputdev_open(struct input_dev *dev)
1579 {
1580         switch (tpacpi_lifecycle) {
1581         case TPACPI_LIFE_INIT:
1582                 /*
1583                  * hotkey_init will call hotkey_poll_setup_safe
1584                  * at the appropriate moment
1585                  */
1586                 return 0;
1587         case TPACPI_LIFE_EXITING:
1588                 return -EBUSY;
1589         case TPACPI_LIFE_RUNNING:
1590                 hotkey_poll_setup_safe(0);
1591                 return 0;
1592         }
1593
1594         /* Should only happen if tpacpi_lifecycle is corrupt */
1595         BUG();
1596         return -EBUSY;
1597 }
1598
1599 static void hotkey_inputdev_close(struct input_dev *dev)
1600 {
1601         /* disable hotkey polling when possible */
1602         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1603                 hotkey_poll_setup_safe(0);
1604 }
1605
1606 /* sysfs hotkey enable ------------------------------------------------- */
1607 static ssize_t hotkey_enable_show(struct device *dev,
1608                            struct device_attribute *attr,
1609                            char *buf)
1610 {
1611         int res, status;
1612
1613         res = hotkey_status_get(&status);
1614         if (res)
1615                 return res;
1616
1617         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1618 }
1619
1620 static ssize_t hotkey_enable_store(struct device *dev,
1621                             struct device_attribute *attr,
1622                             const char *buf, size_t count)
1623 {
1624         unsigned long t;
1625         int res;
1626
1627         if (parse_strtoul(buf, 1, &t))
1628                 return -EINVAL;
1629
1630         res = hotkey_status_set(t);
1631
1632         return (res) ? res : count;
1633 }
1634
1635 static struct device_attribute dev_attr_hotkey_enable =
1636         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1637                 hotkey_enable_show, hotkey_enable_store);
1638
1639 /* sysfs hotkey mask --------------------------------------------------- */
1640 static ssize_t hotkey_mask_show(struct device *dev,
1641                            struct device_attribute *attr,
1642                            char *buf)
1643 {
1644         int res;
1645
1646         if (mutex_lock_interruptible(&hotkey_mutex))
1647                 return -ERESTARTSYS;
1648         res = hotkey_mask_get();
1649         mutex_unlock(&hotkey_mutex);
1650
1651         return (res)?
1652                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1653 }
1654
1655 static ssize_t hotkey_mask_store(struct device *dev,
1656                             struct device_attribute *attr,
1657                             const char *buf, size_t count)
1658 {
1659         unsigned long t;
1660         int res;
1661
1662         if (parse_strtoul(buf, 0xffffffffUL, &t))
1663                 return -EINVAL;
1664
1665         if (mutex_lock_interruptible(&hotkey_mutex))
1666                 return -ERESTARTSYS;
1667
1668         res = hotkey_mask_set(t);
1669
1670 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1671         hotkey_poll_setup(1);
1672 #endif
1673
1674         mutex_unlock(&hotkey_mutex);
1675
1676         return (res) ? res : count;
1677 }
1678
1679 static struct device_attribute dev_attr_hotkey_mask =
1680         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1681                 hotkey_mask_show, hotkey_mask_store);
1682
1683 /* sysfs hotkey bios_enabled ------------------------------------------- */
1684 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1685                            struct device_attribute *attr,
1686                            char *buf)
1687 {
1688         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1689 }
1690
1691 static struct device_attribute dev_attr_hotkey_bios_enabled =
1692         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1693
1694 /* sysfs hotkey bios_mask ---------------------------------------------- */
1695 static ssize_t hotkey_bios_mask_show(struct device *dev,
1696                            struct device_attribute *attr,
1697                            char *buf)
1698 {
1699         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1700 }
1701
1702 static struct device_attribute dev_attr_hotkey_bios_mask =
1703         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1704
1705 /* sysfs hotkey all_mask ----------------------------------------------- */
1706 static ssize_t hotkey_all_mask_show(struct device *dev,
1707                            struct device_attribute *attr,
1708                            char *buf)
1709 {
1710         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1711                                 hotkey_all_mask | hotkey_source_mask);
1712 }
1713
1714 static struct device_attribute dev_attr_hotkey_all_mask =
1715         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1716
1717 /* sysfs hotkey recommended_mask --------------------------------------- */
1718 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1719                                             struct device_attribute *attr,
1720                                             char *buf)
1721 {
1722         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1723                         (hotkey_all_mask | hotkey_source_mask)
1724                         & ~hotkey_reserved_mask);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_recommended_mask =
1728         __ATTR(hotkey_recommended_mask, S_IRUGO,
1729                 hotkey_recommended_mask_show, NULL);
1730
1731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1732
1733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1734 static ssize_t hotkey_source_mask_show(struct device *dev,
1735                            struct device_attribute *attr,
1736                            char *buf)
1737 {
1738         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1739 }
1740
1741 static ssize_t hotkey_source_mask_store(struct device *dev,
1742                             struct device_attribute *attr,
1743                             const char *buf, size_t count)
1744 {
1745         unsigned long t;
1746
1747         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1748                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1749                 return -EINVAL;
1750
1751         if (mutex_lock_interruptible(&hotkey_mutex))
1752                 return -ERESTARTSYS;
1753
1754         HOTKEY_CONFIG_CRITICAL_START
1755         hotkey_source_mask = t;
1756         HOTKEY_CONFIG_CRITICAL_END
1757
1758         hotkey_poll_setup(1);
1759
1760         mutex_unlock(&hotkey_mutex);
1761
1762         return count;
1763 }
1764
1765 static struct device_attribute dev_attr_hotkey_source_mask =
1766         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1767                 hotkey_source_mask_show, hotkey_source_mask_store);
1768
1769 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1770 static ssize_t hotkey_poll_freq_show(struct device *dev,
1771                            struct device_attribute *attr,
1772                            char *buf)
1773 {
1774         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1775 }
1776
1777 static ssize_t hotkey_poll_freq_store(struct device *dev,
1778                             struct device_attribute *attr,
1779                             const char *buf, size_t count)
1780 {
1781         unsigned long t;
1782
1783         if (parse_strtoul(buf, 25, &t))
1784                 return -EINVAL;
1785
1786         if (mutex_lock_interruptible(&hotkey_mutex))
1787                 return -ERESTARTSYS;
1788
1789         hotkey_poll_freq = t;
1790
1791         hotkey_poll_setup(1);
1792         mutex_unlock(&hotkey_mutex);
1793
1794         return count;
1795 }
1796
1797 static struct device_attribute dev_attr_hotkey_poll_freq =
1798         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1799                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1800
1801 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1802
1803 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1804 static ssize_t hotkey_radio_sw_show(struct device *dev,
1805                            struct device_attribute *attr,
1806                            char *buf)
1807 {
1808         int res, s;
1809         res = hotkey_get_wlsw(&s);
1810         if (res < 0)
1811                 return res;
1812
1813         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1814 }
1815
1816 static struct device_attribute dev_attr_hotkey_radio_sw =
1817         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1818
1819 static void hotkey_radio_sw_notify_change(void)
1820 {
1821         if (tp_features.hotkey_wlsw)
1822                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1823                              "hotkey_radio_sw");
1824 }
1825
1826 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1827 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1828                            struct device_attribute *attr,
1829                            char *buf)
1830 {
1831         int res, s;
1832         res = hotkey_get_tablet_mode(&s);
1833         if (res < 0)
1834                 return res;
1835
1836         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1837 }
1838
1839 static struct device_attribute dev_attr_hotkey_tablet_mode =
1840         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1841
1842 static void hotkey_tablet_mode_notify_change(void)
1843 {
1844         if (tp_features.hotkey_tablet)
1845                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1846                              "hotkey_tablet_mode");
1847 }
1848
1849 /* sysfs hotkey report_mode -------------------------------------------- */
1850 static ssize_t hotkey_report_mode_show(struct device *dev,
1851                            struct device_attribute *attr,
1852                            char *buf)
1853 {
1854         return snprintf(buf, PAGE_SIZE, "%d\n",
1855                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1856 }
1857
1858 static struct device_attribute dev_attr_hotkey_report_mode =
1859         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1860
1861 /* sysfs wakeup reason (pollable) -------------------------------------- */
1862 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1863                            struct device_attribute *attr,
1864                            char *buf)
1865 {
1866         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1867 }
1868
1869 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1870         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1871
1872 static void hotkey_wakeup_reason_notify_change(void)
1873 {
1874         if (tp_features.hotkey_mask)
1875                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1876                              "wakeup_reason");
1877 }
1878
1879 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1880 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1881                            struct device_attribute *attr,
1882                            char *buf)
1883 {
1884         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1885 }
1886
1887 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1888         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1889                hotkey_wakeup_hotunplug_complete_show, NULL);
1890
1891 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1892 {
1893         if (tp_features.hotkey_mask)
1894                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1895                              "wakeup_hotunplug_complete");
1896 }
1897
1898 /* --------------------------------------------------------------------- */
1899
1900 static struct attribute *hotkey_attributes[] __initdata = {
1901         &dev_attr_hotkey_enable.attr,
1902         &dev_attr_hotkey_bios_enabled.attr,
1903         &dev_attr_hotkey_report_mode.attr,
1904 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1905         &dev_attr_hotkey_mask.attr,
1906         &dev_attr_hotkey_all_mask.attr,
1907         &dev_attr_hotkey_recommended_mask.attr,
1908         &dev_attr_hotkey_source_mask.attr,
1909         &dev_attr_hotkey_poll_freq.attr,
1910 #endif
1911 };
1912
1913 static struct attribute *hotkey_mask_attributes[] __initdata = {
1914         &dev_attr_hotkey_bios_mask.attr,
1915 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1916         &dev_attr_hotkey_mask.attr,
1917         &dev_attr_hotkey_all_mask.attr,
1918         &dev_attr_hotkey_recommended_mask.attr,
1919 #endif
1920         &dev_attr_hotkey_wakeup_reason.attr,
1921         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1922 };
1923
1924 static void hotkey_exit(void)
1925 {
1926 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1927         hotkey_poll_stop_sync();
1928 #endif
1929
1930         if (hotkey_dev_attributes)
1931                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1932
1933         kfree(hotkey_keycode_map);
1934
1935         if (tp_features.hotkey) {
1936                 dbg_printk(TPACPI_DBG_EXIT,
1937                            "restoring original hot key mask\n");
1938                 /* no short-circuit boolean operator below! */
1939                 if ((hotkey_mask_set(hotkey_orig_mask) |
1940                      hotkey_status_set(hotkey_orig_status)) != 0)
1941                         printk(TPACPI_ERR
1942                                "failed to restore hot key mask "
1943                                "to BIOS defaults\n");
1944         }
1945 }
1946
1947 static int __init hotkey_init(struct ibm_init_struct *iibm)
1948 {
1949         /* Requirements for changing the default keymaps:
1950          *
1951          * 1. Many of the keys are mapped to KEY_RESERVED for very
1952          *    good reasons.  Do not change them unless you have deep
1953          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1954          *    the various ThinkPad models.  The driver behaves
1955          *    differently for KEY_RESERVED: such keys have their
1956          *    hot key mask *unset* in mask_recommended, and also
1957          *    in the initial hot key mask programmed into the
1958          *    firmware at driver load time, which means the firm-
1959          *    ware may react very differently if you change them to
1960          *    something else;
1961          *
1962          * 2. You must be subscribed to the linux-thinkpad and
1963          *    ibm-acpi-devel mailing lists, and you should read the
1964          *    list archives since 2007 if you want to change the
1965          *    keymaps.  This requirement exists so that you will
1966          *    know the past history of problems with the thinkpad-
1967          *    acpi driver keymaps, and also that you will be
1968          *    listening to any bug reports;
1969          *
1970          * 3. Do not send thinkpad-acpi specific patches directly to
1971          *    for merging, *ever*.  Send them to the linux-acpi
1972          *    mailinglist for comments.  Merging is to be done only
1973          *    through acpi-test and the ACPI maintainer.
1974          *
1975          * If the above is too much to ask, don't change the keymap.
1976          * Ask the thinkpad-acpi maintainer to do it, instead.
1977          */
1978         static u16 ibm_keycode_map[] __initdata = {
1979                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1980                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1981                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1982                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1983
1984                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1985                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1986                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1987                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1988
1989                 /* brightness: firmware always reacts to them, unless
1990                  * X.org did some tricks in the radeon BIOS scratch
1991                  * registers of *some* models */
1992                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1993                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1994
1995                 /* Thinklight: firmware always react to it */
1996                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1997
1998                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1999                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2000
2001                 /* Volume: firmware always react to it and reprograms
2002                  * the built-in *extra* mixer.  Never map it to control
2003                  * another mixer by default. */
2004                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2005                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2006                 KEY_RESERVED,   /* 0x16: MUTE */
2007
2008                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2009
2010                 /* (assignments unknown, please report if found) */
2011                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2012                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2013         };
2014         static u16 lenovo_keycode_map[] __initdata = {
2015                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2016                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2017                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2018                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2019
2020                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2021                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2022                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2023                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2024
2025                 /* These either have to go through ACPI video, or
2026                  * act like in the IBM ThinkPads, so don't ever
2027                  * enable them by default */
2028                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2029                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2030
2031                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2032
2033                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2034                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2035
2036                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2037                  * react to it and reprograms the built-in *extra* mixer.
2038                  * Never map it to control another mixer by default.
2039                  *
2040                  * T60?, T61, R60?, R61: firmware and EC tries to send
2041                  * these over the regular keyboard, so these are no-ops,
2042                  * but there are still weird bugs re. MUTE, so do not
2043                  * change unless you get test reports from all Lenovo
2044                  * models.  May cause the BIOS to interfere with the
2045                  * HDA mixer.
2046                  */
2047                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2048                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2049                 KEY_RESERVED,   /* 0x16: MUTE */
2050
2051                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2052
2053                 /* (assignments unknown, please report if found) */
2054                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2055                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2056         };
2057
2058 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2059 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2060 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2061
2062         int res, i;
2063         int status;
2064         int hkeyv;
2065
2066         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2067
2068         BUG_ON(!tpacpi_inputdev);
2069         BUG_ON(tpacpi_inputdev->open != NULL ||
2070                tpacpi_inputdev->close != NULL);
2071
2072         TPACPI_ACPIHANDLE_INIT(hkey);
2073         mutex_init(&hotkey_mutex);
2074
2075 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2076         mutex_init(&hotkey_thread_mutex);
2077         mutex_init(&hotkey_thread_data_mutex);
2078 #endif
2079
2080         /* hotkey not supported on 570 */
2081         tp_features.hotkey = hkey_handle != NULL;
2082
2083         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2084                 str_supported(tp_features.hotkey));
2085
2086         if (!tp_features.hotkey)
2087                 return 1;
2088
2089         hotkey_dev_attributes = create_attr_set(13, NULL);
2090         if (!hotkey_dev_attributes)
2091                 return -ENOMEM;
2092         res = add_many_to_attr_set(hotkey_dev_attributes,
2093                         hotkey_attributes,
2094                         ARRAY_SIZE(hotkey_attributes));
2095         if (res)
2096                 goto err_exit;
2097
2098         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2099            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2100            for HKEY interface version 0x100 */
2101         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2102                 if ((hkeyv >> 8) != 1) {
2103                         printk(TPACPI_ERR "unknown version of the "
2104                                "HKEY interface: 0x%x\n", hkeyv);
2105                         printk(TPACPI_ERR "please report this to %s\n",
2106                                TPACPI_MAIL);
2107                 } else {
2108                         /*
2109                          * MHKV 0x100 in A31, R40, R40e,
2110                          * T4x, X31, and later
2111                          */
2112                         tp_features.hotkey_mask = 1;
2113                 }
2114         }
2115
2116         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2117                 str_supported(tp_features.hotkey_mask));
2118
2119         if (tp_features.hotkey_mask) {
2120                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2121                                 "MHKA", "qd")) {
2122                         printk(TPACPI_ERR
2123                                "missing MHKA handler, "
2124                                "please report this to %s\n",
2125                                TPACPI_MAIL);
2126                         /* FN+F12, FN+F4, FN+F3 */
2127                         hotkey_all_mask = 0x080cU;
2128                 }
2129         }
2130
2131         /* hotkey_source_mask *must* be zero for
2132          * the first hotkey_mask_get */
2133         res = hotkey_status_get(&hotkey_orig_status);
2134         if (res)
2135                 goto err_exit;
2136
2137         if (tp_features.hotkey_mask) {
2138                 res = hotkey_mask_get();
2139                 if (res)
2140                         goto err_exit;
2141
2142                 hotkey_orig_mask = hotkey_mask;
2143                 res = add_many_to_attr_set(
2144                                 hotkey_dev_attributes,
2145                                 hotkey_mask_attributes,
2146                                 ARRAY_SIZE(hotkey_mask_attributes));
2147                 if (res)
2148                         goto err_exit;
2149         }
2150
2151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2152         if (tp_features.hotkey_mask) {
2153                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2154                                         & ~hotkey_all_mask;
2155         } else {
2156                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2157         }
2158
2159         vdbg_printk(TPACPI_DBG_INIT,
2160                     "hotkey source mask 0x%08x, polling freq %d\n",
2161                     hotkey_source_mask, hotkey_poll_freq);
2162 #endif
2163
2164         /* Not all thinkpads have a hardware radio switch */
2165         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2166                 tp_features.hotkey_wlsw = 1;
2167                 printk(TPACPI_INFO
2168                         "radio switch found; radios are %s\n",
2169                         enabled(status, 0));
2170         }
2171         if (tp_features.hotkey_wlsw)
2172                 res = add_to_attr_set(hotkey_dev_attributes,
2173                                 &dev_attr_hotkey_radio_sw.attr);
2174
2175         /* For X41t, X60t, X61t Tablets... */
2176         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2177                 tp_features.hotkey_tablet = 1;
2178                 printk(TPACPI_INFO
2179                         "possible tablet mode switch found; "
2180                         "ThinkPad in %s mode\n",
2181                         (status & TP_HOTKEY_TABLET_MASK)?
2182                                 "tablet" : "laptop");
2183                 res = add_to_attr_set(hotkey_dev_attributes,
2184                                 &dev_attr_hotkey_tablet_mode.attr);
2185         }
2186
2187         if (!res)
2188                 res = register_attr_set_with_sysfs(
2189                                 hotkey_dev_attributes,
2190                                 &tpacpi_pdev->dev.kobj);
2191         if (res)
2192                 goto err_exit;
2193
2194         /* Set up key map */
2195
2196         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2197                                         GFP_KERNEL);
2198         if (!hotkey_keycode_map) {
2199                 printk(TPACPI_ERR
2200                         "failed to allocate memory for key map\n");
2201                 res = -ENOMEM;
2202                 goto err_exit;
2203         }
2204
2205         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2206                 dbg_printk(TPACPI_DBG_INIT,
2207                            "using Lenovo default hot key map\n");
2208                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2209                         TPACPI_HOTKEY_MAP_SIZE);
2210         } else {
2211                 dbg_printk(TPACPI_DBG_INIT,
2212                            "using IBM default hot key map\n");
2213                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2214                         TPACPI_HOTKEY_MAP_SIZE);
2215         }
2216
2217         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2218         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2219         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2220         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2221         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2222         tpacpi_inputdev->keycode = hotkey_keycode_map;
2223         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2224                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2225                         set_bit(hotkey_keycode_map[i],
2226                                 tpacpi_inputdev->keybit);
2227                 } else {
2228                         if (i < sizeof(hotkey_reserved_mask)*8)
2229                                 hotkey_reserved_mask |= 1 << i;
2230                 }
2231         }
2232
2233         if (tp_features.hotkey_wlsw) {
2234                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2235                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2236         }
2237         if (tp_features.hotkey_tablet) {
2238                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2239                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2240         }
2241
2242         /* Do not issue duplicate brightness change events to
2243          * userspace */
2244         if (!tp_features.bright_acpimode)
2245                 /* update bright_acpimode... */
2246                 tpacpi_check_std_acpi_brightness_support();
2247
2248         if (tp_features.bright_acpimode) {
2249                 printk(TPACPI_INFO
2250                        "This ThinkPad has standard ACPI backlight "
2251                        "brightness control, supported by the ACPI "
2252                        "video driver\n");
2253                 printk(TPACPI_NOTICE
2254                        "Disabling thinkpad-acpi brightness events "
2255                        "by default...\n");
2256
2257                 /* The hotkey_reserved_mask change below is not
2258                  * necessary while the keys are at KEY_RESERVED in the
2259                  * default map, but better safe than sorry, leave it
2260                  * here as a marker of what we have to do, especially
2261                  * when we finally become able to set this at runtime
2262                  * on response to X.org requests */
2263                 hotkey_reserved_mask |=
2264                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2265                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2266         }
2267
2268         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2269         res = hotkey_status_set(1);
2270         if (res) {
2271                 hotkey_exit();
2272                 return res;
2273         }
2274         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2275                                 & ~hotkey_reserved_mask)
2276                                 | hotkey_orig_mask);
2277         if (res < 0 && res != -ENXIO) {
2278                 hotkey_exit();
2279                 return res;
2280         }
2281
2282         dbg_printk(TPACPI_DBG_INIT,
2283                         "legacy hot key reporting over procfs %s\n",
2284                         (hotkey_report_mode < 2) ?
2285                                 "enabled" : "disabled");
2286
2287         tpacpi_inputdev->open = &hotkey_inputdev_open;
2288         tpacpi_inputdev->close = &hotkey_inputdev_close;
2289
2290         hotkey_poll_setup_safe(1);
2291         tpacpi_input_send_radiosw();
2292         tpacpi_input_send_tabletsw();
2293
2294         return 0;
2295
2296 err_exit:
2297         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2298         hotkey_dev_attributes = NULL;
2299
2300         return (res < 0)? res : 1;
2301 }
2302
2303 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2304 {
2305         u32 hkey;
2306         unsigned int scancode;
2307         int send_acpi_ev;
2308         int ignore_acpi_ev;
2309         int unk_ev;
2310
2311         if (event != 0x80) {
2312                 printk(TPACPI_ERR
2313                        "unknown HKEY notification event %d\n", event);
2314                 /* forward it to userspace, maybe it knows how to handle it */
2315                 acpi_bus_generate_netlink_event(
2316                                         ibm->acpi->device->pnp.device_class,
2317                                         ibm->acpi->device->dev.bus_id,
2318                                         event, 0);
2319                 return;
2320         }
2321
2322         while (1) {
2323                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2324                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2325                         return;
2326                 }
2327
2328                 if (hkey == 0) {
2329                         /* queue empty */
2330                         return;
2331                 }
2332
2333                 send_acpi_ev = 1;
2334                 ignore_acpi_ev = 0;
2335                 unk_ev = 0;
2336
2337                 switch (hkey >> 12) {
2338                 case 1:
2339                         /* 0x1000-0x1FFF: key presses */
2340                         scancode = hkey & 0xfff;
2341                         if (scancode > 0 && scancode < 0x21) {
2342                                 scancode--;
2343                                 if (!(hotkey_source_mask & (1 << scancode))) {
2344                                         tpacpi_input_send_key(scancode);
2345                                         send_acpi_ev = 0;
2346                                 } else {
2347                                         ignore_acpi_ev = 1;
2348                                 }
2349                         } else {
2350                                 unk_ev = 1;
2351                         }
2352                         break;
2353                 case 2:
2354                         /* Wakeup reason */
2355                         switch (hkey) {
2356                         case 0x2304: /* suspend, undock */
2357                         case 0x2404: /* hibernation, undock */
2358                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2359                                 ignore_acpi_ev = 1;
2360                                 break;
2361                         case 0x2305: /* suspend, bay eject */
2362                         case 0x2405: /* hibernation, bay eject */
2363                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2364                                 ignore_acpi_ev = 1;
2365                                 break;
2366                         default:
2367                                 unk_ev = 1;
2368                         }
2369                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2370                                 printk(TPACPI_INFO
2371                                        "woke up due to a hot-unplug "
2372                                        "request...\n");
2373                                 hotkey_wakeup_reason_notify_change();
2374                         }
2375                         break;
2376                 case 3:
2377                         /* bay-related wakeups */
2378                         if (hkey == 0x3003) {
2379                                 hotkey_autosleep_ack = 1;
2380                                 printk(TPACPI_INFO
2381                                        "bay ejected\n");
2382                                 hotkey_wakeup_hotunplug_complete_notify_change();
2383                         } else {
2384                                 unk_ev = 1;
2385                         }
2386                         break;
2387                 case 4:
2388                         /* dock-related wakeups */
2389                         if (hkey == 0x4003) {
2390                                 hotkey_autosleep_ack = 1;
2391                                 printk(TPACPI_INFO
2392                                        "undocked\n");
2393                                 hotkey_wakeup_hotunplug_complete_notify_change();
2394                         } else {
2395                                 unk_ev = 1;
2396                         }
2397                         break;
2398                 case 5:
2399                         /* 0x5000-0x5FFF: human interface helpers */
2400                         switch (hkey) {
2401                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2402                         case 0x500b: /* X61t: tablet pen inserted into bay */
2403                         case 0x500c: /* X61t: tablet pen removed from bay */
2404                                 break;
2405                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2406                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2407                                 tpacpi_input_send_tabletsw();
2408                                 hotkey_tablet_mode_notify_change();
2409                                 send_acpi_ev = 0;
2410                                 break;
2411                         case 0x5001:
2412                         case 0x5002:
2413                                 /* LID switch events.  Do not propagate */
2414                                 ignore_acpi_ev = 1;
2415                                 break;
2416                         default:
2417                                 unk_ev = 1;
2418                         }
2419                         break;
2420                 case 7:
2421                         /* 0x7000-0x7FFF: misc */
2422                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2423                                 tpacpi_input_send_radiosw();
2424                                 hotkey_radio_sw_notify_change();
2425                                 send_acpi_ev = 0;
2426                                 break;
2427                         }
2428                         /* fallthrough to default */
2429                 default:
2430                         unk_ev = 1;
2431                 }
2432                 if (unk_ev) {
2433                         printk(TPACPI_NOTICE
2434                                "unhandled HKEY event 0x%04x\n", hkey);
2435                 }
2436
2437                 /* Legacy events */
2438                 if (!ignore_acpi_ev &&
2439                     (send_acpi_ev || hotkey_report_mode < 2)) {
2440                         acpi_bus_generate_proc_event(ibm->acpi->device,
2441                                                      event, hkey);
2442                 }
2443
2444                 /* netlink events */
2445                 if (!ignore_acpi_ev && send_acpi_ev) {
2446                         acpi_bus_generate_netlink_event(
2447                                         ibm->acpi->device->pnp.device_class,
2448                                         ibm->acpi->device->dev.bus_id,
2449                                         event, hkey);
2450                 }
2451         }
2452 }
2453
2454 static void hotkey_suspend(pm_message_t state)
2455 {
2456         /* Do these on suspend, we get the events on early resume! */
2457         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2458         hotkey_autosleep_ack = 0;
2459 }
2460
2461 static void hotkey_resume(void)
2462 {
2463         if (hotkey_mask_get())
2464                 printk(TPACPI_ERR
2465                        "error while trying to read hot key mask "
2466                        "from firmware\n");
2467         tpacpi_input_send_radiosw();
2468         hotkey_radio_sw_notify_change();
2469         hotkey_tablet_mode_notify_change();
2470         hotkey_wakeup_reason_notify_change();
2471         hotkey_wakeup_hotunplug_complete_notify_change();
2472         hotkey_poll_setup_safe(0);
2473 }
2474
2475 /* procfs -------------------------------------------------------------- */
2476 static int hotkey_read(char *p)
2477 {
2478         int res, status;
2479         int len = 0;
2480
2481         if (!tp_features.hotkey) {
2482                 len += sprintf(p + len, "status:\t\tnot supported\n");
2483                 return len;
2484         }
2485
2486         if (mutex_lock_interruptible(&hotkey_mutex))
2487                 return -ERESTARTSYS;
2488         res = hotkey_status_get(&status);
2489         if (!res)
2490                 res = hotkey_mask_get();
2491         mutex_unlock(&hotkey_mutex);
2492         if (res)
2493                 return res;
2494
2495         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2496         if (tp_features.hotkey_mask) {
2497                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2498                 len += sprintf(p + len,
2499                                "commands:\tenable, disable, reset, <mask>\n");
2500         } else {
2501                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2502                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2503         }
2504
2505         return len;
2506 }
2507
2508 static int hotkey_write(char *buf)
2509 {
2510         int res, status;
2511         u32 mask;
2512         char *cmd;
2513
2514         if (!tp_features.hotkey)
2515                 return -ENODEV;
2516
2517         if (mutex_lock_interruptible(&hotkey_mutex))
2518                 return -ERESTARTSYS;
2519
2520         status = -1;
2521         mask = hotkey_mask;
2522
2523         res = 0;
2524         while ((cmd = next_cmd(&buf))) {
2525                 if (strlencmp(cmd, "enable") == 0) {
2526                         status = 1;
2527                 } else if (strlencmp(cmd, "disable") == 0) {
2528                         status = 0;
2529                 } else if (strlencmp(cmd, "reset") == 0) {
2530                         status = hotkey_orig_status;
2531                         mask = hotkey_orig_mask;
2532                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2533                         /* mask set */
2534                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2535                         /* mask set */
2536                 } else {
2537                         res = -EINVAL;
2538                         goto errexit;
2539                 }
2540         }
2541         if (status != -1)
2542                 res = hotkey_status_set(status);
2543
2544         if (!res && mask != hotkey_mask)
2545                 res = hotkey_mask_set(mask);
2546
2547 errexit:
2548         mutex_unlock(&hotkey_mutex);
2549         return res;
2550 }
2551
2552 static const struct acpi_device_id ibm_htk_device_ids[] = {
2553         {TPACPI_ACPI_HKEY_HID, 0},
2554         {"", 0},
2555 };
2556
2557 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2558         .hid = ibm_htk_device_ids,
2559         .notify = hotkey_notify,
2560         .handle = &hkey_handle,
2561         .type = ACPI_DEVICE_NOTIFY,
2562 };
2563
2564 static struct ibm_struct hotkey_driver_data = {
2565         .name = "hotkey",
2566         .read = hotkey_read,
2567         .write = hotkey_write,
2568         .exit = hotkey_exit,
2569         .resume = hotkey_resume,
2570         .suspend = hotkey_suspend,
2571         .acpi = &ibm_hotkey_acpidriver,
2572 };
2573
2574 /*************************************************************************
2575  * Bluetooth subdriver
2576  */
2577
2578 enum {
2579         /* ACPI GBDC/SBDC bits */
2580         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2581         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2582         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2583 };
2584
2585 static int bluetooth_get_radiosw(void);
2586 static int bluetooth_set_radiosw(int radio_on);
2587
2588 /* sysfs bluetooth enable ---------------------------------------------- */
2589 static ssize_t bluetooth_enable_show(struct device *dev,
2590                            struct device_attribute *attr,
2591                            char *buf)
2592 {
2593         int status;
2594
2595         status = bluetooth_get_radiosw();
2596         if (status < 0)
2597                 return status;
2598
2599         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2600 }
2601
2602 static ssize_t bluetooth_enable_store(struct device *dev,
2603                             struct device_attribute *attr,
2604                             const char *buf, size_t count)
2605 {
2606         unsigned long t;
2607         int res;
2608
2609         if (parse_strtoul(buf, 1, &t))
2610                 return -EINVAL;
2611
2612         res = bluetooth_set_radiosw(t);
2613
2614         return (res) ? res : count;
2615 }
2616
2617 static struct device_attribute dev_attr_bluetooth_enable =
2618         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2619                 bluetooth_enable_show, bluetooth_enable_store);
2620
2621 /* --------------------------------------------------------------------- */
2622
2623 static struct attribute *bluetooth_attributes[] = {
2624         &dev_attr_bluetooth_enable.attr,
2625         NULL
2626 };
2627
2628 static const struct attribute_group bluetooth_attr_group = {
2629         .attrs = bluetooth_attributes,
2630 };
2631
2632 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2633 {
2634         int res;
2635         int status = 0;
2636
2637         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2638
2639         TPACPI_ACPIHANDLE_INIT(hkey);
2640
2641         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2642            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2643         tp_features.bluetooth = hkey_handle &&
2644             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2645
2646         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2647                 str_supported(tp_features.bluetooth),
2648                 status);
2649
2650         if (tp_features.bluetooth &&
2651             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2652                 /* no bluetooth hardware present in system */
2653                 tp_features.bluetooth = 0;
2654                 dbg_printk(TPACPI_DBG_INIT,
2655                            "bluetooth hardware not installed\n");
2656         }
2657
2658         if (tp_features.bluetooth) {
2659                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2660                                 &bluetooth_attr_group);
2661                 if (res)
2662                         return res;
2663         }
2664
2665         return (tp_features.bluetooth)? 0 : 1;
2666 }
2667
2668 static void bluetooth_exit(void)
2669 {
2670         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2671                         &bluetooth_attr_group);
2672 }
2673
2674 static int bluetooth_get_radiosw(void)
2675 {
2676         int status;
2677
2678         if (!tp_features.bluetooth)
2679                 return -ENODEV;
2680
2681         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2682                 return -EIO;
2683
2684         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2685 }
2686
2687 static int bluetooth_set_radiosw(int radio_on)
2688 {
2689         int status;
2690
2691         if (!tp_features.bluetooth)
2692                 return -ENODEV;
2693
2694         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2695                 return -EIO;
2696         if (radio_on)
2697                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2698         else
2699                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2700         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2701                 return -EIO;
2702
2703         return 0;
2704 }
2705
2706 /* procfs -------------------------------------------------------------- */
2707 static int bluetooth_read(char *p)
2708 {
2709         int len = 0;
2710         int status = bluetooth_get_radiosw();
2711
2712         if (!tp_features.bluetooth)
2713                 len += sprintf(p + len, "status:\t\tnot supported\n");
2714         else {
2715                 len += sprintf(p + len, "status:\t\t%s\n",
2716                                 (status)? "enabled" : "disabled");
2717                 len += sprintf(p + len, "commands:\tenable, disable\n");
2718         }
2719
2720         return len;
2721 }
2722
2723 static int bluetooth_write(char *buf)
2724 {
2725         char *cmd;
2726
2727         if (!tp_features.bluetooth)
2728                 return -ENODEV;
2729
2730         while ((cmd = next_cmd(&buf))) {
2731                 if (strlencmp(cmd, "enable") == 0) {
2732                         bluetooth_set_radiosw(1);
2733                 } else if (strlencmp(cmd, "disable") == 0) {
2734                         bluetooth_set_radiosw(0);
2735                 } else
2736                         return -EINVAL;
2737         }
2738
2739         return 0;
2740 }
2741
2742 static struct ibm_struct bluetooth_driver_data = {
2743         .name = "bluetooth",
2744         .read = bluetooth_read,
2745         .write = bluetooth_write,
2746         .exit = bluetooth_exit,
2747 };
2748
2749 /*************************************************************************
2750  * Wan subdriver
2751  */
2752
2753 enum {
2754         /* ACPI GWAN/SWAN bits */
2755         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2756         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2757         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2758 };
2759
2760 static int wan_get_radiosw(void);
2761 static int wan_set_radiosw(int radio_on);
2762
2763 /* sysfs wan enable ---------------------------------------------------- */
2764 static ssize_t wan_enable_show(struct device *dev,
2765                            struct device_attribute *attr,
2766                            char *buf)
2767 {
2768         int status;
2769
2770         status = wan_get_radiosw();
2771         if (status < 0)
2772                 return status;
2773
2774         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2775 }
2776
2777 static ssize_t wan_enable_store(struct device *dev,
2778                             struct device_attribute *attr,
2779                             const char *buf, size_t count)
2780 {
2781         unsigned long t;
2782         int res;
2783
2784         if (parse_strtoul(buf, 1, &t))
2785                 return -EINVAL;
2786
2787         res = wan_set_radiosw(t);
2788
2789         return (res) ? res : count;
2790 }
2791
2792 static struct device_attribute dev_attr_wan_enable =
2793         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2794                 wan_enable_show, wan_enable_store);
2795
2796 /* --------------------------------------------------------------------- */
2797
2798 static struct attribute *wan_attributes[] = {
2799         &dev_attr_wan_enable.attr,
2800         NULL
2801 };
2802
2803 static const struct attribute_group wan_attr_group = {
2804         .attrs = wan_attributes,
2805 };
2806
2807 static int __init wan_init(struct ibm_init_struct *iibm)
2808 {
2809         int res;
2810         int status = 0;
2811
2812         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2813
2814         TPACPI_ACPIHANDLE_INIT(hkey);
2815
2816         tp_features.wan = hkey_handle &&
2817             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2818
2819         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2820                 str_supported(tp_features.wan),
2821                 status);
2822
2823         if (tp_features.wan &&
2824             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
2825                 /* no wan hardware present in system */
2826                 tp_features.wan = 0;
2827                 dbg_printk(TPACPI_DBG_INIT,
2828                            "wan hardware not installed\n");
2829         }
2830
2831         if (tp_features.wan) {
2832                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2833                                 &wan_attr_group);
2834                 if (res)
2835                         return res;
2836         }
2837
2838         return (tp_features.wan)? 0 : 1;
2839 }
2840
2841 static void wan_exit(void)
2842 {
2843         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2844                 &wan_attr_group);
2845 }
2846
2847 static int wan_get_radiosw(void)
2848 {
2849         int status;
2850
2851         if (!tp_features.wan)
2852                 return -ENODEV;
2853
2854         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2855                 return -EIO;
2856
2857         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2858 }
2859
2860 static int wan_set_radiosw(int radio_on)
2861 {
2862         int status;
2863
2864         if (!tp_features.wan)
2865                 return -ENODEV;
2866
2867         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2868                 return -EIO;
2869         if (radio_on)
2870                 status |= TP_ACPI_WANCARD_RADIOSSW;
2871         else
2872                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2873         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2874                 return -EIO;
2875
2876         return 0;
2877 }
2878
2879 /* procfs -------------------------------------------------------------- */
2880 static int wan_read(char *p)
2881 {
2882         int len = 0;
2883         int status = wan_get_radiosw();
2884
2885         if (!tp_features.wan)
2886                 len += sprintf(p + len, "status:\t\tnot supported\n");
2887         else {
2888                 len += sprintf(p + len, "status:\t\t%s\n",
2889                                 (status)? "enabled" : "disabled");
2890                 len += sprintf(p + len, "commands:\tenable, disable\n");
2891         }
2892
2893         return len;
2894 }
2895
2896 static int wan_write(char *buf)
2897 {
2898         char *cmd;
2899
2900         if (!tp_features.wan)
2901                 return -ENODEV;
2902
2903         while ((cmd = next_cmd(&buf))) {
2904                 if (strlencmp(cmd, "enable") == 0) {
2905                         wan_set_radiosw(1);
2906                 } else if (strlencmp(cmd, "disable") == 0) {
2907                         wan_set_radiosw(0);
2908                 } else
2909                         return -EINVAL;
2910         }
2911
2912         return 0;
2913 }
2914
2915 static struct ibm_struct wan_driver_data = {
2916         .name = "wan",
2917         .read = wan_read,
2918         .write = wan_write,
2919         .exit = wan_exit,
2920         .flags.experimental = 1,
2921 };
2922
2923 /*************************************************************************
2924  * Video subdriver
2925  */
2926
2927 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2928
2929 enum video_access_mode {
2930         TPACPI_VIDEO_NONE = 0,
2931         TPACPI_VIDEO_570,       /* 570 */
2932         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2933         TPACPI_VIDEO_NEW,       /* all others */
2934 };
2935
2936 enum {  /* video status flags, based on VIDEO_570 */
2937         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2938         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2939         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2940 };
2941
2942 enum {  /* TPACPI_VIDEO_570 constants */
2943         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2944         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2945                                                  * video_status_flags */
2946         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2947         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2948 };
2949
2950 static enum video_access_mode video_supported;
2951 static int video_orig_autosw;
2952
2953 static int video_autosw_get(void);
2954 static int video_autosw_set(int enable);
2955
2956 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2957
2958 static int __init video_init(struct ibm_init_struct *iibm)
2959 {
2960         int ivga;
2961
2962         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2963
2964         TPACPI_ACPIHANDLE_INIT(vid);
2965         TPACPI_ACPIHANDLE_INIT(vid2);
2966
2967         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2968                 /* G41, assume IVGA doesn't change */
2969                 vid_handle = vid2_handle;
2970
2971         if (!vid_handle)
2972                 /* video switching not supported on R30, R31 */
2973                 video_supported = TPACPI_VIDEO_NONE;
2974         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2975                 /* 570 */
2976                 video_supported = TPACPI_VIDEO_570;
2977         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2978                 /* 600e/x, 770e, 770x */
2979                 video_supported = TPACPI_VIDEO_770;
2980         else
2981                 /* all others */
2982                 video_supported = TPACPI_VIDEO_NEW;
2983
2984         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2985                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2986                 video_supported);
2987
2988         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2989 }
2990
2991 static void video_exit(void)
2992 {
2993         dbg_printk(TPACPI_DBG_EXIT,
2994                    "restoring original video autoswitch mode\n");
2995         if (video_autosw_set(video_orig_autosw))
2996                 printk(TPACPI_ERR "error while trying to restore original "
2997                         "video autoswitch mode\n");
2998 }
2999
3000 static int video_outputsw_get(void)
3001 {
3002         int status = 0;
3003         int i;
3004
3005         switch (video_supported) {
3006         case TPACPI_VIDEO_570:
3007                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3008                                  TP_ACPI_VIDEO_570_PHSCMD))
3009                         return -EIO;
3010                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3011                 break;
3012         case TPACPI_VIDEO_770:
3013                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3014                         return -EIO;
3015                 if (i)
3016                         status |= TP_ACPI_VIDEO_S_LCD;
3017                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3018                         return -EIO;
3019                 if (i)
3020                         status |= TP_ACPI_VIDEO_S_CRT;
3021                 break;
3022         case TPACPI_VIDEO_NEW:
3023                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3024                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3025                         return -EIO;
3026                 if (i)
3027                         status |= TP_ACPI_VIDEO_S_CRT;
3028
3029                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3030                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3031                         return -EIO;
3032                 if (i)
3033                         status |= TP_ACPI_VIDEO_S_LCD;
3034                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3035                         return -EIO;
3036                 if (i)
3037                         status |= TP_ACPI_VIDEO_S_DVI;
3038                 break;
3039         default:
3040                 return -ENOSYS;
3041         }
3042
3043         return status;
3044 }
3045
3046 static int video_outputsw_set(int status)
3047 {
3048         int autosw;
3049         int res = 0;
3050
3051         switch (video_supported) {
3052         case TPACPI_VIDEO_570:
3053                 res = acpi_evalf(NULL, NULL,
3054                                  "\\_SB.PHS2", "vdd",
3055                                  TP_ACPI_VIDEO_570_PHS2CMD,
3056                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3057                 break;
3058         case TPACPI_VIDEO_770:
3059                 autosw = video_autosw_get();
3060                 if (autosw < 0)
3061                         return autosw;
3062
3063                 res = video_autosw_set(1);
3064                 if (res)
3065                         return res;
3066                 res = acpi_evalf(vid_handle, NULL,
3067                                  "ASWT", "vdd", status * 0x100, 0);
3068                 if (!autosw && video_autosw_set(autosw)) {
3069                         printk(TPACPI_ERR
3070                                "video auto-switch left enabled due to error\n");
3071                         return -EIO;
3072                 }
3073                 break;
3074         case TPACPI_VIDEO_NEW:
3075                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3076                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3077                 break;
3078         default:
3079                 return -ENOSYS;
3080         }
3081
3082         return (res)? 0 : -EIO;
3083 }
3084
3085 static int video_autosw_get(void)
3086 {
3087         int autosw = 0;
3088
3089         switch (video_supported) {
3090         case TPACPI_VIDEO_570:
3091                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3092                         return -EIO;
3093                 break;
3094         case TPACPI_VIDEO_770:
3095         case TPACPI_VIDEO_NEW:
3096                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3097                         return -EIO;
3098                 break;
3099         default:
3100                 return -ENOSYS;
3101         }
3102
3103         return autosw & 1;
3104 }
3105
3106 static int video_autosw_set(int enable)
3107 {
3108         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3109                 return -EIO;
3110         return 0;
3111 }
3112
3113 static int video_outputsw_cycle(void)
3114 {
3115         int autosw = video_autosw_get();
3116         int res;
3117
3118         if (autosw < 0)
3119                 return autosw;
3120
3121         switch (video_supported) {
3122         case TPACPI_VIDEO_570:
3123                 res = video_autosw_set(1);
3124                 if (res)
3125                         return res;
3126                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3127                 break;
3128         case TPACPI_VIDEO_770:
3129         case TPACPI_VIDEO_NEW:
3130                 res = video_autosw_set(1);
3131                 if (res)
3132                         return res;
3133                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3134                 break;
3135         default:
3136                 return -ENOSYS;
3137         }
3138         if (!autosw && video_autosw_set(autosw)) {
3139                 printk(TPACPI_ERR
3140                        "video auto-switch left enabled due to error\n");
3141                 return -EIO;
3142         }
3143
3144         return (res)? 0 : -EIO;
3145 }
3146
3147 static int video_expand_toggle(void)
3148 {
3149         switch (video_supported) {
3150         case TPACPI_VIDEO_570:
3151                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3152                         0 : -EIO;
3153         case TPACPI_VIDEO_770:
3154                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3155                         0 : -EIO;
3156         case TPACPI_VIDEO_NEW:
3157                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3158                         0 : -EIO;
3159         default:
3160                 return -ENOSYS;
3161         }
3162         /* not reached */
3163 }
3164
3165 static int video_read(char *p)
3166 {
3167         int status, autosw;
3168         int len = 0;
3169
3170         if (video_supported == TPACPI_VIDEO_NONE) {
3171                 len += sprintf(p + len, "status:\t\tnot supported\n");
3172                 return len;
3173         }
3174
3175         status = video_outputsw_get();
3176         if (status < 0)
3177                 return status;
3178
3179         autosw = video_autosw_get();
3180         if (autosw < 0)
3181                 return autosw;
3182
3183         len += sprintf(p + len, "status:\t\tsupported\n");
3184         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3185         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3186         if (video_supported == TPACPI_VIDEO_NEW)
3187                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3188         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3189         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3190         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3191         if (video_supported == TPACPI_VIDEO_NEW)
3192                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3193         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3194         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3195
3196         return len;
3197 }
3198
3199 static int video_write(char *buf)
3200 {
3201         char *cmd;
3202         int enable, disable, status;
3203         int res;
3204
3205         if (video_supported == TPACPI_VIDEO_NONE)
3206                 return -ENODEV;
3207
3208         enable = 0;
3209         disable = 0;
3210
3211         while ((cmd = next_cmd(&buf))) {
3212                 if (strlencmp(cmd, "lcd_enable") == 0) {
3213                         enable |= TP_ACPI_VIDEO_S_LCD;
3214                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3215                         disable |= TP_ACPI_VIDEO_S_LCD;
3216                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3217                         enable |= TP_ACPI_VIDEO_S_CRT;
3218                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3219                         disable |= TP_ACPI_VIDEO_S_CRT;
3220                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3221                            strlencmp(cmd, "dvi_enable") == 0) {
3222                         enable |= TP_ACPI_VIDEO_S_DVI;
3223                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3224                            strlencmp(cmd, "dvi_disable") == 0) {
3225                         disable |= TP_ACPI_VIDEO_S_DVI;
3226                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3227                         res = video_autosw_set(1);
3228                         if (res)
3229                                 return res;
3230                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3231                         res = video_autosw_set(0);
3232                         if (res)
3233                                 return res;
3234                 } else if (strlencmp(cmd, "video_switch") == 0) {
3235                         res = video_outputsw_cycle();
3236                         if (res)
3237                                 return res;
3238                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3239                         res = video_expand_toggle();
3240                         if (res)
3241                                 return res;
3242                 } else
3243                         return -EINVAL;
3244         }
3245
3246         if (enable || disable) {
3247                 status = video_outputsw_get();
3248                 if (status < 0)
3249                         return status;
3250                 res = video_outputsw_set((status & ~disable) | enable);
3251                 if (res)
3252                         return res;
3253         }
3254
3255         return 0;
3256 }
3257
3258 static struct ibm_struct video_driver_data = {
3259         .name = "video",
3260         .read = video_read,
3261         .write = video_write,
3262         .exit = video_exit,
3263 };
3264
3265 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3266
3267 /*************************************************************************
3268  * Light (thinklight) subdriver
3269  */
3270
3271 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3272 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3273
3274 static int light_get_status(void)
3275 {
3276         int status = 0;
3277
3278         if (tp_features.light_status) {
3279                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3280                         return -EIO;
3281                 return (!!status);
3282         }
3283
3284         return -ENXIO;
3285 }
3286
3287 static int light_set_status(int status)
3288 {
3289         int rc;
3290
3291         if (tp_features.light) {
3292                 if (cmos_handle) {
3293                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3294                                         (status)?
3295                                                 TP_CMOS_THINKLIGHT_ON :
3296                                                 TP_CMOS_THINKLIGHT_OFF);
3297                 } else {
3298                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3299                                         (status)? 1 : 0);
3300                 }
3301                 return (rc)? 0 : -EIO;
3302         }
3303
3304         return -ENXIO;
3305 }
3306
3307 static void light_set_status_worker(struct work_struct *work)
3308 {
3309         struct tpacpi_led_classdev *data =
3310                         container_of(work, struct tpacpi_led_classdev, work);
3311
3312         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3313                 light_set_status((data->new_brightness != LED_OFF));
3314 }
3315
3316 static void light_sysfs_set(struct led_classdev *led_cdev,
3317                         enum led_brightness brightness)
3318 {
3319         struct tpacpi_led_classdev *data =
3320                 container_of(led_cdev,
3321                              struct tpacpi_led_classdev,
3322                              led_classdev);
3323         data->new_brightness = brightness;
3324         queue_work(tpacpi_wq, &data->work);
3325 }
3326
3327 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3328 {
3329         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3330 }
3331
3332 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3333         .led_classdev = {
3334                 .name           = "tpacpi::thinklight",
3335                 .brightness_set = &light_sysfs_set,
3336                 .brightness_get = &light_sysfs_get,
3337         }
3338 };
3339
3340 static int __init light_init(struct ibm_init_struct *iibm)
3341 {
3342         int rc;
3343
3344         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3345
3346         TPACPI_ACPIHANDLE_INIT(ledb);
3347         TPACPI_ACPIHANDLE_INIT(lght);
3348         TPACPI_ACPIHANDLE_INIT(cmos);
3349         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3350
3351         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3352         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3353
3354         if (tp_features.light)
3355                 /* light status not supported on
3356                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3357                 tp_features.light_status =
3358                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3359
3360         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3361                 str_supported(tp_features.light),
3362                 str_supported(tp_features.light_status));
3363
3364         if (!tp_features.light)
3365                 return 1;
3366
3367         rc = led_classdev_register(&tpacpi_pdev->dev,
3368                                    &tpacpi_led_thinklight.led_classdev);
3369
3370         if (rc < 0) {
3371                 tp_features.light = 0;
3372                 tp_features.light_status = 0;
3373         } else  {
3374                 rc = 0;
3375         }
3376
3377         return rc;
3378 }
3379
3380 static void light_exit(void)
3381 {
3382         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3383         if (work_pending(&tpacpi_led_thinklight.work))
3384                 flush_workqueue(tpacpi_wq);
3385 }
3386
3387 static int light_read(char *p)
3388 {
3389         int len = 0;
3390         int status;
3391
3392         if (!tp_features.light) {
3393                 len += sprintf(p + len, "status:\t\tnot supported\n");
3394         } else if (!tp_features.light_status) {
3395                 len += sprintf(p + len, "status:\t\tunknown\n");
3396                 len += sprintf(p + len, "commands:\ton, off\n");
3397         } else {
3398                 status = light_get_status();
3399                 if (status < 0)
3400                         return status;
3401                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3402                 len += sprintf(p + len, "commands:\ton, off\n");
3403         }
3404
3405         return len;
3406 }
3407
3408 static int light_write(char *buf)
3409 {
3410         char *cmd;
3411         int newstatus = 0;
3412
3413         if (!tp_features.light)
3414                 return -ENODEV;
3415
3416         while ((cmd = next_cmd(&buf))) {
3417                 if (strlencmp(cmd, "on") == 0) {
3418                         newstatus = 1;
3419                 } else if (strlencmp(cmd, "off") == 0) {
3420                         newstatus = 0;
3421                 } else
3422                         return -EINVAL;
3423         }
3424
3425         return light_set_status(newstatus);
3426 }
3427
3428 static struct ibm_struct light_driver_data = {
3429         .name = "light",
3430         .read = light_read,
3431         .write = light_write,
3432         .exit = light_exit,
3433 };
3434
3435 /*************************************************************************
3436  * Dock subdriver
3437  */
3438
3439 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3440
3441 static void dock_notify(struct ibm_struct *ibm, u32 event);
3442 static int dock_read(char *p);
3443 static int dock_write(char *buf);
3444
3445 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3446            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3447            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3448            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3449     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3450
3451 /* don't list other alternatives as we install a notify handler on the 570 */
3452 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3453
3454 static const struct acpi_device_id ibm_pci_device_ids[] = {
3455         {PCI_ROOT_HID_STRING, 0},
3456         {"", 0},
3457 };
3458
3459 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3460         {
3461          .notify = dock_notify,
3462          .handle = &dock_handle,
3463          .type = ACPI_SYSTEM_NOTIFY,
3464         },
3465         {
3466         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3467          * We just use it to get notifications of dock hotplug
3468          * in very old thinkpads */
3469          .hid = ibm_pci_device_ids,
3470          .notify = dock_notify,
3471          .handle = &pci_handle,
3472          .type = ACPI_SYSTEM_NOTIFY,
3473         },
3474 };
3475
3476 static struct ibm_struct dock_driver_data[2] = {
3477         {
3478          .name = "dock",
3479          .read = dock_read,
3480          .write = dock_write,
3481          .acpi = &ibm_dock_acpidriver[0],
3482         },
3483         {
3484          .name = "dock",
3485          .acpi = &ibm_dock_acpidriver[1],
3486         },
3487 };
3488
3489 #define dock_docked() (_sta(dock_handle) & 1)
3490
3491 static int __init dock_init(struct ibm_init_struct *iibm)
3492 {
3493         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3494
3495         TPACPI_ACPIHANDLE_INIT(dock);
3496
3497         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3498                 str_supported(dock_handle != NULL));
3499
3500         return (dock_handle)? 0 : 1;
3501 }
3502
3503 static int __init dock_init2(struct ibm_init_struct *iibm)
3504 {
3505         int dock2_needed;
3506
3507         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3508
3509         if (dock_driver_data[0].flags.acpi_driver_registered &&
3510             dock_driver_data[0].flags.acpi_notify_installed) {
3511                 TPACPI_ACPIHANDLE_INIT(pci);
3512                 dock2_needed = (pci_handle != NULL);
3513                 vdbg_printk(TPACPI_DBG_INIT,
3514                             "dock PCI handler for the TP 570 is %s\n",
3515                             str_supported(dock2_needed));
3516         } else {
3517                 vdbg_printk(TPACPI_DBG_INIT,
3518                 "dock subdriver part 2 not required\n");
3519                 dock2_needed = 0;
3520         }
3521
3522         return (dock2_needed)? 0 : 1;
3523 }
3524
3525 static void dock_notify(struct ibm_struct *ibm, u32 event)
3526 {
3527         int docked = dock_docked();
3528         int pci = ibm->acpi->hid && ibm->acpi->device &&
3529                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3530         int data;
3531
3532         if (event == 1 && !pci) /* 570 */
3533                 data = 1;       /* button */
3534         else if (event == 1 && pci)     /* 570 */
3535                 data = 3;       /* dock */
3536         else if (event == 3 && docked)
3537                 data = 1;       /* button */
3538         else if (event == 3 && !docked)
3539                 data = 2;       /* undock */
3540         else if (event == 0 && docked)
3541                 data = 3;       /* dock */
3542         else {
3543                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3544                        event, _sta(dock_handle));
3545                 data = 0;       /* unknown */
3546         }
3547         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3548         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3549                                           ibm->acpi->device->dev.bus_id,
3550                                           event, data);
3551 }
3552
3553 static int dock_read(char *p)
3554 {
3555         int len = 0;
3556         int docked = dock_docked();
3557
3558         if (!dock_handle)
3559                 len += sprintf(p + len, "status:\t\tnot supported\n");
3560         else if (!docked)
3561                 len += sprintf(p + len, "status:\t\tundocked\n");
3562         else {
3563                 len += sprintf(p + len, "status:\t\tdocked\n");
3564                 len += sprintf(p + len, "commands:\tdock, undock\n");
3565         }
3566
3567         return len;
3568 }
3569
3570 static int dock_write(char *buf)
3571 {
3572         char *cmd;
3573
3574         if (!dock_docked())
3575                 return -ENODEV;
3576
3577         while ((cmd = next_cmd(&buf))) {
3578                 if (strlencmp(cmd, "undock") == 0) {
3579                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3580                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3581                                 return -EIO;
3582                 } else if (strlencmp(cmd, "dock") == 0) {
3583                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3584                                 return -EIO;
3585                 } else
3586                         return -EINVAL;
3587         }
3588
3589         return 0;
3590 }
3591
3592 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3593
3594 /*************************************************************************
3595  * Bay subdriver
3596  */
3597
3598 #ifdef CONFIG_THINKPAD_ACPI_BAY
3599
3600 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3601            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3602            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3603            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3604            );                           /* A21e, R30, R31 */
3605 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3606            "_EJ0",              /* all others */
3607            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3608 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3609            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3610            );                           /* all others */
3611 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3612            "_EJ0",                      /* 770x */
3613            );                           /* all others */
3614
3615 static int __init bay_init(struct ibm_init_struct *iibm)
3616 {
3617         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3618
3619         TPACPI_ACPIHANDLE_INIT(bay);
3620         if (bay_handle)
3621                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3622         TPACPI_ACPIHANDLE_INIT(bay2);
3623         if (bay2_handle)
3624                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3625
3626         tp_features.bay_status = bay_handle &&
3627                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3628         tp_features.bay_status2 = bay2_handle &&
3629                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3630
3631         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3632                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3633         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3634                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3635
3636         vdbg_printk(TPACPI_DBG_INIT,
3637                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3638                 str_supported(tp_features.bay_status),
3639                 str_supported(tp_features.bay_eject),
3640                 str_supported(tp_features.bay_status2),
3641                 str_supported(tp_features.bay_eject2));
3642
3643         return (tp_features.bay_status || tp_features.bay_eject ||
3644                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3645 }
3646
3647 static void bay_notify(struct ibm_struct *ibm, u32 event)
3648 {
3649         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3650         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3651                                           ibm->acpi->device->dev.bus_id,
3652                                           event, 0);
3653 }
3654
3655 #define bay_occupied(b) (_sta(b##_handle) & 1)
3656
3657 static int bay_read(char *p)
3658 {
3659         int len = 0;
3660         int occupied = bay_occupied(bay);
3661         int occupied2 = bay_occupied(bay2);
3662         int eject, eject2;
3663
3664         len += sprintf(p + len, "status:\t\t%s\n",
3665                 tp_features.bay_status ?
3666                         (occupied ? "occupied" : "unoccupied") :
3667                                 "not supported");
3668         if (tp_features.bay_status2)
3669                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3670                                "occupied" : "unoccupied");
3671
3672         eject = tp_features.bay_eject && occupied;
3673         eject2 = tp_features.bay_eject2 && occupied2;
3674
3675         if (eject && eject2)
3676                 len += sprintf(p + len, "commands:\teject, eject2\n");
3677         else if (eject)
3678                 len += sprintf(p + len, "commands:\teject\n");
3679         else if (eject2)
3680                 len += sprintf(p + len, "commands:\teject2\n");
3681
3682         return len;
3683 }
3684
3685 static int bay_write(char *buf)
3686 {
3687         char *cmd;
3688
3689         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3690                 return -ENODEV;
3691
3692         while ((cmd = next_cmd(&buf))) {
3693                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3694                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3695                                 return -EIO;
3696                 } else if (tp_features.bay_eject2 &&
3697                            strlencmp(cmd, "eject2") == 0) {
3698                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3699                                 return -EIO;
3700                 } else
3701                         return -EINVAL;
3702         }
3703
3704         return 0;
3705 }
3706
3707 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3708         .notify = bay_notify,
3709         .handle = &bay_handle,
3710         .type = ACPI_SYSTEM_NOTIFY,
3711 };
3712
3713 static struct ibm_struct bay_driver_data = {
3714         .name = "bay",
3715         .read = bay_read,
3716         .write = bay_write,
3717         .acpi = &ibm_bay_acpidriver,
3718 };
3719
3720 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3721
3722 /*************************************************************************
3723  * CMOS subdriver
3724  */
3725
3726 /* sysfs cmos_command -------------------------------------------------- */
3727 static ssize_t cmos_command_store(struct device *dev,
3728                             struct device_attribute *attr,
3729                             const char *buf, size_t count)
3730 {
3731         unsigned long cmos_cmd;
3732         int res;
3733
3734         if (parse_strtoul(buf, 21, &cmos_cmd))
3735                 return -EINVAL;
3736
3737         res = issue_thinkpad_cmos_command(cmos_cmd);
3738         return (res)? res : count;
3739 }
3740
3741 static struct device_attribute dev_attr_cmos_command =
3742         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3743
3744 /* --------------------------------------------------------------------- */
3745
3746 static int __init cmos_init(struct ibm_init_struct *iibm)
3747 {
3748         int res;
3749
3750         vdbg_printk(TPACPI_DBG_INIT,
3751                 "initializing cmos commands subdriver\n");
3752
3753         TPACPI_ACPIHANDLE_INIT(cmos);
3754
3755         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3756                 str_supported(cmos_handle != NULL));
3757
3758         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3759         if (res)
3760                 return res;
3761
3762         return (cmos_handle)? 0 : 1;
3763 }
3764
3765 static void cmos_exit(void)
3766 {
3767         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3768 }
3769
3770 static int cmos_read(char *p)
3771 {
3772         int len = 0;
3773
3774         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3775            R30, R31, T20-22, X20-21 */
3776         if (!cmos_handle)
3777                 len += sprintf(p + len, "status:\t\tnot supported\n");
3778         else {
3779                 len += sprintf(p + len, "status:\t\tsupported\n");
3780                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3781         }
3782
3783         return len;
3784 }
3785
3786 static int cmos_write(char *buf)
3787 {
3788         char *cmd;
3789         int cmos_cmd, res;
3790
3791         while ((cmd = next_cmd(&buf))) {
3792                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3793                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3794                         /* cmos_cmd set */
3795                 } else
3796                         return -EINVAL;
3797
3798                 res = issue_thinkpad_cmos_command(cmos_cmd);
3799                 if (res)
3800                         return res;
3801         }
3802
3803         return 0;
3804 }
3805
3806 static struct ibm_struct cmos_driver_data = {
3807         .name = "cmos",
3808         .read = cmos_read,
3809         .write = cmos_write,
3810         .exit = cmos_exit,
3811 };
3812
3813 /*************************************************************************
3814  * LED subdriver
3815  */
3816
3817 enum led_access_mode {
3818         TPACPI_LED_NONE = 0,
3819         TPACPI_LED_570, /* 570 */
3820         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3821         TPACPI_LED_NEW, /* all others */
3822 };
3823
3824 enum {  /* For TPACPI_LED_OLD */
3825         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3826         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3827         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3828 };
3829
3830 enum led_status_t {
3831         TPACPI_LED_OFF = 0,
3832         TPACPI_LED_ON,
3833         TPACPI_LED_BLINK,
3834 };
3835
3836 static enum led_access_mode led_supported;
3837
3838 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3839            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3840                                 /* T20-22, X20-21 */
3841            "LED",               /* all others */
3842            );                   /* R30, R31 */
3843
3844 #define TPACPI_LED_NUMLEDS 8
3845 static struct tpacpi_led_classdev *tpacpi_leds;
3846 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3847 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3848         /* there's a limit of 19 chars + NULL before 2.6.26 */
3849         "tpacpi::power",
3850         "tpacpi:orange:batt",
3851         "tpacpi:green:batt",
3852         "tpacpi::dock_active",
3853         "tpacpi::bay_active",
3854         "tpacpi::dock_batt",
3855         "tpacpi::unknown_led",
3856         "tpacpi::standby",
3857 };
3858
3859 static int led_get_status(const unsigned int led)
3860 {
3861         int status;
3862         enum led_status_t led_s;
3863
3864         switch (led_supported) {
3865         case TPACPI_LED_570:
3866                 if (!acpi_evalf(ec_handle,
3867                                 &status, "GLED", "dd", 1 << led))
3868                         return -EIO;
3869                 led_s = (status == 0)?
3870                                 TPACPI_LED_OFF :
3871                                 ((status == 1)?
3872                                         TPACPI_LED_ON :
3873                                         TPACPI_LED_BLINK);
3874                 tpacpi_led_state_cache[led] = led_s;
3875                 return led_s;
3876         default:
3877                 return -ENXIO;
3878         }
3879
3880         /* not reached */
3881 }
3882
3883 static int led_set_status(const unsigned int led,
3884                           const enum led_status_t ledstatus)
3885 {
3886         /* off, on, blink. Index is led_status_t */
3887         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
3888         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
3889
3890         int rc = 0;
3891
3892         switch (led_supported) {
3893         case TPACPI_LED_570:
3894                 /* 570 */
3895                 if (led > 7)
3896                         return -EINVAL;
3897                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3898                                 (1 << led), led_sled_arg1[ledstatus]))
3899                         rc = -EIO;
3900                 break;
3901         case TPACPI_LED_OLD:
3902                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3903                 if (led > 7)
3904                         return -EINVAL;
3905                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
3906                 if (rc >= 0)
3907                         rc = ec_write(TPACPI_LED_EC_HLBL,
3908                                       (ledstatus == TPACPI_LED_BLINK) << led);
3909                 if (rc >= 0)
3910                         rc = ec_write(TPACPI_LED_EC_HLCL,
3911                                       (ledstatus != TPACPI_LED_OFF) << led);
3912                 break;
3913         case TPACPI_LED_NEW:
3914                 /* all others */
3915                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3916                                 led, led_led_arg1[ledstatus]))
3917                         rc = -EIO;
3918                 break;
3919         default:
3920                 rc = -ENXIO;
3921         }
3922
3923         if (!rc)
3924                 tpacpi_led_state_cache[led] = ledstatus;
3925
3926         return rc;
3927 }
3928
3929 static void led_sysfs_set_status(unsigned int led,
3930                                  enum led_brightness brightness)
3931 {
3932         led_set_status(led,
3933                         (brightness == LED_OFF) ?
3934                         TPACPI_LED_OFF :
3935                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3936                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
3937 }
3938
3939 static void led_set_status_worker(struct work_struct *work)
3940 {
3941         struct tpacpi_led_classdev *data =
3942                 container_of(work, struct tpacpi_led_classdev, work);
3943
3944         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3945                 led_sysfs_set_status(data->led, data->new_brightness);
3946 }
3947
3948 static void led_sysfs_set(struct led_classdev *led_cdev,
3949                         enum led_brightness brightness)
3950 {
3951         struct tpacpi_led_classdev *data = container_of(led_cdev,
3952                              struct tpacpi_led_classdev, led_classdev);
3953
3954         data->new_brightness = brightness;
3955         queue_work(tpacpi_wq, &data->work);
3956 }
3957
3958 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3959                         unsigned long *delay_on, unsigned long *delay_off)
3960 {
3961         struct tpacpi_led_classdev *data = container_of(led_cdev,
3962                              struct tpacpi_led_classdev, led_classdev);
3963
3964         /* Can we choose the flash rate? */
3965         if (*delay_on == 0 && *delay_off == 0) {
3966                 /* yes. set them to the hardware blink rate (1 Hz) */
3967                 *delay_on = 500; /* ms */
3968                 *delay_off = 500; /* ms */
3969         } else if ((*delay_on != 500) || (*delay_off != 500))
3970                 return -EINVAL;
3971
3972         data->new_brightness = TPACPI_LED_BLINK;
3973         queue_work(tpacpi_wq, &data->work);
3974
3975         return 0;
3976 }
3977
3978 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3979 {
3980         int rc;
3981
3982         struct tpacpi_led_classdev *data = container_of(led_cdev,
3983                              struct tpacpi_led_classdev, led_classdev);
3984
3985         rc = led_get_status(data->led);
3986
3987         if (rc == TPACPI_LED_OFF || rc < 0)
3988                 rc = LED_OFF;   /* no error handling in led class :( */
3989         else
3990                 rc = LED_FULL;
3991
3992         return rc;
3993 }
3994
3995 static void led_exit(void)
3996 {
3997         unsigned int i;
3998
3999         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4000                 if (tpacpi_leds[i].led_classdev.name)
4001                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4002         }
4003
4004         kfree(tpacpi_leds);
4005 }
4006
4007 static int __init led_init(struct ibm_init_struct *iibm)
4008 {
4009         unsigned int i;
4010         int rc;
4011
4012         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4013
4014         TPACPI_ACPIHANDLE_INIT(led);
4015
4016         if (!led_handle)
4017                 /* led not supported on R30, R31 */
4018                 led_supported = TPACPI_LED_NONE;
4019         else if (strlencmp(led_path, "SLED") == 0)
4020                 /* 570 */
4021                 led_supported = TPACPI_LED_570;
4022         else if (strlencmp(led_path, "SYSL") == 0)
4023                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4024                 led_supported = TPACPI_LED_OLD;
4025         else
4026                 /* all others */
4027                 led_supported = TPACPI_LED_NEW;
4028
4029         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4030                 str_supported(led_supported), led_supported);
4031
4032         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4033                               GFP_KERNEL);
4034         if (!tpacpi_leds) {
4035                 printk(TPACPI_ERR "Out of memory for LED data\n");
4036                 return -ENOMEM;
4037         }
4038
4039         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4040                 tpacpi_leds[i].led = i;
4041
4042                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4043                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4044                 if (led_supported == TPACPI_LED_570)
4045                         tpacpi_leds[i].led_classdev.brightness_get =
4046                                                         &led_sysfs_get;
4047
4048                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4049
4050                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4051
4052                 rc = led_classdev_register(&tpacpi_pdev->dev,
4053                                            &tpacpi_leds[i].led_classdev);
4054                 if (rc < 0) {
4055                         tpacpi_leds[i].led_classdev.name = NULL;
4056                         led_exit();
4057                         return rc;
4058                 }
4059         }
4060
4061         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4062 }
4063
4064 #define str_led_status(s) \
4065         ((s) == TPACPI_LED_OFF ? "off" : \
4066                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4067
4068 static int led_read(char *p)
4069 {
4070         int len = 0;
4071
4072         if (!led_supported) {
4073                 len += sprintf(p + len, "status:\t\tnot supported\n");
4074                 return len;
4075         }
4076         len += sprintf(p + len, "status:\t\tsupported\n");
4077
4078         if (led_supported == TPACPI_LED_570) {
4079                 /* 570 */
4080                 int i, status;
4081                 for (i = 0; i < 8; i++) {
4082                         status = led_get_status(i);
4083                         if (status < 0)
4084                                 return -EIO;
4085                         len += sprintf(p + len, "%d:\t\t%s\n",
4086                                        i, str_led_status(status));
4087                 }
4088         }
4089
4090         len += sprintf(p + len, "commands:\t"
4091                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4092
4093         return len;
4094 }
4095
4096 static int led_write(char *buf)
4097 {
4098         char *cmd;
4099         int led, rc;
4100         enum led_status_t s;
4101
4102         if (!led_supported)
4103                 return -ENODEV;
4104
4105         while ((cmd = next_cmd(&buf))) {
4106                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4107                         return -EINVAL;
4108
4109                 if (strstr(cmd, "off")) {
4110                         s = TPACPI_LED_OFF;
4111                 } else if (strstr(cmd, "on")) {
4112                         s = TPACPI_LED_ON;
4113                 } else if (strstr(cmd, "blink")) {
4114                         s = TPACPI_LED_BLINK;
4115                 } else {
4116                         return -EINVAL;
4117                 }
4118
4119                 rc = led_set_status(led, s);
4120                 if (rc < 0)
4121                         return rc;
4122         }
4123
4124         return 0;
4125 }
4126
4127 static struct ibm_struct led_driver_data = {
4128         .name = "led",
4129         .read = led_read,
4130         .write = led_write,
4131         .exit = led_exit,
4132 };
4133
4134 /*************************************************************************
4135  * Beep subdriver
4136  */
4137
4138 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4139
4140 static int __init beep_init(struct ibm_init_struct *iibm)
4141 {
4142         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4143
4144         TPACPI_ACPIHANDLE_INIT(beep);
4145
4146         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4147                 str_supported(beep_handle != NULL));
4148
4149         return (beep_handle)? 0 : 1;
4150 }
4151
4152 static int beep_read(char *p)
4153 {
4154         int len = 0;
4155
4156         if (!beep_handle)
4157                 len += sprintf(p + len, "status:\t\tnot supported\n");
4158         else {
4159                 len += sprintf(p + len, "status:\t\tsupported\n");
4160                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4161         }
4162
4163         return len;
4164 }
4165
4166 static int beep_write(char *buf)
4167 {
4168         char *cmd;
4169         int beep_cmd;
4170
4171         if (!beep_handle)
4172                 return -ENODEV;
4173
4174         while ((cmd = next_cmd(&buf))) {
4175                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4176                     beep_cmd >= 0 && beep_cmd <= 17) {
4177                         /* beep_cmd set */
4178                 } else
4179                         return -EINVAL;
4180                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4181                         return -EIO;
4182         }
4183
4184         return 0;
4185 }
4186
4187 static struct ibm_struct beep_driver_data = {
4188         .name = "beep",
4189         .read = beep_read,
4190         .write = beep_write,
4191 };
4192
4193 /*************************************************************************
4194  * Thermal subdriver
4195  */
4196
4197 enum thermal_access_mode {
4198         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4199         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4200         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4201         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4202         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4203 };
4204
4205 enum { /* TPACPI_THERMAL_TPEC_* */
4206         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4207         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4208         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4209 };
4210
4211 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4212 struct ibm_thermal_sensors_struct {
4213         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4214 };
4215
4216 static enum thermal_access_mode thermal_read_mode;
4217
4218 /* idx is zero-based */
4219 static int thermal_get_sensor(int idx, s32 *value)
4220 {
4221         int t;
4222         s8 tmp;
4223         char tmpi[5];
4224
4225         t = TP_EC_THERMAL_TMP0;
4226
4227         switch (thermal_read_mode) {
4228 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4229         case TPACPI_THERMAL_TPEC_16:
4230                 if (idx >= 8 && idx <= 15) {
4231                         t = TP_EC_THERMAL_TMP8;
4232                         idx -= 8;
4233                 }
4234                 /* fallthrough */
4235 #endif
4236         case TPACPI_THERMAL_TPEC_8:
4237                 if (idx <= 7) {
4238                         if (!acpi_ec_read(t + idx, &tmp))
4239                                 return -EIO;
4240                         *value = tmp * 1000;
4241                         return 0;
4242                 }
4243                 break;
4244
4245         case TPACPI_THERMAL_ACPI_UPDT:
4246                 if (idx <= 7) {
4247                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4248                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4249                                 return -EIO;
4250                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4251                                 return -EIO;
4252                         *value = (t - 2732) * 100;
4253                         return 0;
4254                 }
4255                 break;
4256
4257         case TPACPI_THERMAL_ACPI_TMP07:
4258                 if (idx <= 7) {
4259                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4260                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4261                                 return -EIO;
4262                         if (t > 127 || t < -127)
4263                                 t = TP_EC_THERMAL_TMP_NA;
4264                         *value = t * 1000;
4265                         return 0;
4266                 }
4267                 break;
4268
4269         case TPACPI_THERMAL_NONE:
4270         default:
4271                 return -ENOSYS;
4272         }
4273
4274         return -EINVAL;
4275 }
4276
4277 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4278 {
4279         int res, i;
4280         int n;
4281
4282         n = 8;
4283         i = 0;
4284
4285         if (!s)
4286                 return -EINVAL;
4287
4288         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4289                 n = 16;
4290
4291         for (i = 0 ; i < n; i++) {
4292                 res = thermal_get_sensor(i, &s->temp[i]);
4293                 if (res)
4294                         return res;
4295         }
4296
4297         return n;
4298 }
4299
4300 /* sysfs temp##_input -------------------------------------------------- */
4301
4302 static ssize_t thermal_temp_input_show(struct device *dev,
4303                            struct device_attribute *attr,
4304                            char *buf)
4305 {
4306         struct sensor_device_attribute *sensor_attr =
4307                                         to_sensor_dev_attr(attr);
4308         int idx = sensor_attr->index;
4309         s32 value;
4310         int res;
4311
4312         res = thermal_get_sensor(idx, &value);
4313         if (res)
4314                 return res;
4315         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4316                 return -ENXIO;
4317
4318         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4319 }
4320
4321 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4322          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4323                      thermal_temp_input_show, NULL, _idxB)
4324
4325 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4326         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4327         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4328         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4329         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4330         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4331         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4332         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4333         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4334         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4335         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4336         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4337         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4338         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4339         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4340         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4341         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4342 };
4343
4344 #define THERMAL_ATTRS(X) \
4345         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4346
4347 static struct attribute *thermal_temp_input_attr[] = {
4348         THERMAL_ATTRS(8),
4349         THERMAL_ATTRS(9),
4350         THERMAL_ATTRS(10),
4351         THERMAL_ATTRS(11),
4352         THERMAL_ATTRS(12),
4353         THERMAL_ATTRS(13),
4354         THERMAL_ATTRS(14),
4355         THERMAL_ATTRS(15),
4356         THERMAL_ATTRS(0),
4357         THERMAL_ATTRS(1),
4358         THERMAL_ATTRS(2),
4359         THERMAL_ATTRS(3),
4360         THERMAL_ATTRS(4),
4361         THERMAL_ATTRS(5),
4362         THERMAL_ATTRS(6),
4363         THERMAL_ATTRS(7),
4364         NULL
4365 };
4366
4367 static const struct attribute_group thermal_temp_input16_group = {
4368         .attrs = thermal_temp_input_attr
4369 };
4370
4371 static const struct attribute_group thermal_temp_input8_group = {
4372         .attrs = &thermal_temp_input_attr[8]
4373 };
4374
4375 #undef THERMAL_SENSOR_ATTR_TEMP
4376 #undef THERMAL_ATTRS
4377
4378 /* --------------------------------------------------------------------- */
4379
4380 static int __init thermal_init(struct ibm_init_struct *iibm)
4381 {
4382         u8 t, ta1, ta2;
4383         int i;
4384         int acpi_tmp7;
4385         int res;
4386
4387         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4388
4389         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4390
4391         if (thinkpad_id.ec_model) {
4392                 /*
4393                  * Direct EC access mode: sensors at registers
4394                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4395                  * non-implemented, thermal sensors return 0x80 when
4396                  * not available
4397                  */
4398
4399                 ta1 = ta2 = 0;
4400                 for (i = 0; i < 8; i++) {
4401                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4402                                 ta1 |= t;
4403                         } else {
4404                                 ta1 = 0;
4405                                 break;
4406                         }
4407                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4408                                 ta2 |= t;
4409                         } else {
4410                                 ta1 = 0;
4411                                 break;
4412                         }
4413                 }
4414                 if (ta1 == 0) {
4415                         /* This is sheer paranoia, but we handle it anyway */
4416                         if (acpi_tmp7) {
4417                                 printk(TPACPI_ERR
4418                                        "ThinkPad ACPI EC access misbehaving, "
4419                                        "falling back to ACPI TMPx access "
4420                                        "mode\n");
4421                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4422                         } else {
4423                                 printk(TPACPI_ERR
4424                                        "ThinkPad ACPI EC access misbehaving, "
4425                                        "disabling thermal sensors access\n");
4426                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4427                         }
4428                 } else {
4429                         thermal_read_mode =
4430                             (ta2 != 0) ?
4431                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4432                 }
4433         } else if (acpi_tmp7) {
4434                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4435                         /* 600e/x, 770e, 770x */
4436                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4437                 } else {
4438                         /* Standard ACPI TMPx access, max 8 sensors */
4439                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4440                 }
4441         } else {
4442                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4443                 thermal_read_mode = TPACPI_THERMAL_NONE;
4444         }
4445
4446         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4447                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4448                 thermal_read_mode);
4449
4450         switch (thermal_read_mode) {
4451         case TPACPI_THERMAL_TPEC_16:
4452                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4453                                 &thermal_temp_input16_group);
4454                 if (res)
4455                         return res;
4456                 break;
4457         case TPACPI_THERMAL_TPEC_8:
4458         case TPACPI_THERMAL_ACPI_TMP07:
4459         case TPACPI_THERMAL_ACPI_UPDT:
4460                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4461                                 &thermal_temp_input8_group);
4462                 if (res)
4463                         return res;
4464                 break;
4465         case TPACPI_THERMAL_NONE:
4466         default:
4467                 return 1;
4468         }
4469
4470         return 0;
4471 }
4472
4473 static void thermal_exit(void)
4474 {
4475         switch (thermal_read_mode) {
4476         case TPACPI_THERMAL_TPEC_16:
4477                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4478                                    &thermal_temp_input16_group);
4479                 break;
4480         case TPACPI_THERMAL_TPEC_8:
4481         case TPACPI_THERMAL_ACPI_TMP07:
4482         case TPACPI_THERMAL_ACPI_UPDT:
4483                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4484                                    &thermal_temp_input16_group);
4485                 break;
4486         case TPACPI_THERMAL_NONE:
4487         default:
4488                 break;
4489         }
4490 }
4491
4492 static int thermal_read(char *p)
4493 {
4494         int len = 0;
4495         int n, i;
4496         struct ibm_thermal_sensors_struct t;
4497
4498         n = thermal_get_sensors(&t);
4499         if (unlikely(n < 0))
4500                 return n;
4501
4502         len += sprintf(p + len, "temperatures:\t");
4503
4504         if (n > 0) {
4505                 for (i = 0; i < (n - 1); i++)
4506                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4507                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4508         } else
4509                 len += sprintf(p + len, "not supported\n");
4510
4511         return len;
4512 }
4513
4514 static struct ibm_struct thermal_driver_data = {
4515         .name = "thermal",
4516         .read = thermal_read,
4517         .exit = thermal_exit,
4518 };
4519
4520 /*************************************************************************
4521  * EC Dump subdriver
4522  */
4523
4524 static u8 ecdump_regs[256];
4525
4526 static int ecdump_read(char *p)
4527 {
4528         int len = 0;
4529         int i, j;
4530         u8 v;
4531
4532         len += sprintf(p + len, "EC      "
4533                        " +00 +01 +02 +03 +04 +05 +06 +07"
4534                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4535         for (i = 0; i < 256; i += 16) {
4536                 len += sprintf(p + len, "EC 0x%02x:", i);
4537                 for (j = 0; j < 16; j++) {
4538                         if (!acpi_ec_read(i + j, &v))
4539                                 break;
4540                         if (v != ecdump_regs[i + j])
4541                                 len += sprintf(p + len, " *%02x", v);
4542                         else
4543                                 len += sprintf(p + len, "  %02x", v);
4544                         ecdump_regs[i + j] = v;
4545                 }
4546                 len += sprintf(p + len, "\n");
4547                 if (j != 16)
4548                         break;
4549         }
4550
4551         /* These are way too dangerous to advertise openly... */
4552 #if 0
4553         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4554                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4555         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4556                        " (<offset> is 00-ff, <value> is 0-255)\n");
4557 #endif
4558         return len;
4559 }
4560
4561 static int ecdump_write(char *buf)
4562 {
4563         char *cmd;
4564         int i, v;
4565
4566         while ((cmd = next_cmd(&buf))) {
4567                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4568                         /* i and v set */
4569                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4570                         /* i and v set */
4571                 } else
4572                         return -EINVAL;
4573                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4574                         if (!acpi_ec_write(i, v))
4575                                 return -EIO;
4576                 } else
4577                         return -EINVAL;
4578         }
4579
4580         return 0;
4581 }
4582
4583 static struct ibm_struct ecdump_driver_data = {
4584         .name = "ecdump",
4585         .read = ecdump_read,
4586         .write = ecdump_write,
4587         .flags.experimental = 1,
4588 };
4589
4590 /*************************************************************************
4591  * Backlight/brightness subdriver
4592  */
4593
4594 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4595
4596 enum {
4597         TP_EC_BACKLIGHT = 0x31,
4598
4599         /* TP_EC_BACKLIGHT bitmasks */
4600         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4601         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4602         TP_EC_BACKLIGHT_MAPSW = 0x20,
4603 };
4604
4605 static struct backlight_device *ibm_backlight_device;
4606 static int brightness_mode;
4607 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4608
4609 static struct mutex brightness_mutex;
4610
4611 /*
4612  * ThinkPads can read brightness from two places: EC 0x31, or
4613  * CMOS NVRAM byte 0x5E, bits 0-3.
4614  *
4615  * EC 0x31 has the following layout
4616  *   Bit 7: unknown function
4617  *   Bit 6: unknown function
4618  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4619  *   Bit 4: must be set to zero to avoid problems
4620  *   Bit 3-0: backlight brightness level
4621  *
4622  * brightness_get_raw returns status data in the EC 0x31 layout
4623  */
4624 static int brightness_get_raw(int *status)
4625 {
4626         u8 lec = 0, lcmos = 0, level = 0;
4627
4628         if (brightness_mode & 1) {
4629                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4630                         return -EIO;
4631                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4632         };
4633         if (brightness_mode & 2) {
4634                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4635                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4636                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4637                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4638                 level = lcmos;
4639         }
4640
4641         if (brightness_mode == 3) {
4642                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4643                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4644                 if (lec == lcmos)
4645                         tp_warned.bright_cmos_ec_unsync = 0;
4646                 else {
4647                         if (!tp_warned.bright_cmos_ec_unsync) {
4648                                 printk(TPACPI_ERR
4649                                         "CMOS NVRAM (%u) and EC (%u) do not "
4650                                         "agree on display brightness level\n",
4651                                         (unsigned int) lcmos,
4652                                         (unsigned int) lec);
4653                                 tp_warned.bright_cmos_ec_unsync = 1;
4654                         }
4655                         return -EIO;
4656                 }
4657         } else {
4658                 *status = level;
4659         }
4660
4661         return 0;
4662 }
4663
4664 /* May return EINTR which can always be mapped to ERESTARTSYS */
4665 static int brightness_set(int value)
4666 {
4667         int cmos_cmd, inc, i, res;
4668         int current_value;
4669         int command_bits;
4670
4671         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4672             value < 0)
4673                 return -EINVAL;
4674
4675         res = mutex_lock_interruptible(&brightness_mutex);
4676         if (res < 0)
4677                 return res;
4678
4679         res = brightness_get_raw(&current_value);
4680         if (res < 0)
4681                 goto errout;
4682
4683         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4684         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4685
4686         cmos_cmd = value > current_value ?
4687                         TP_CMOS_BRIGHTNESS_UP :
4688                         TP_CMOS_BRIGHTNESS_DOWN;
4689         inc = (value > current_value)? 1 : -1;
4690
4691         res = 0;
4692         for (i = current_value; i != value; i += inc) {
4693                 if ((brightness_mode & 2) &&
4694                     issue_thinkpad_cmos_command(cmos_cmd)) {
4695                         res = -EIO;
4696                         goto errout;
4697                 }
4698                 if ((brightness_mode & 1) &&
4699                     !acpi_ec_write(TP_EC_BACKLIGHT,
4700                                    (i + inc) | command_bits)) {
4701                         res = -EIO;
4702                         goto errout;;
4703                 }
4704         }
4705
4706 errout:
4707         mutex_unlock(&brightness_mutex);
4708         return res;
4709 }
4710
4711 /* sysfs backlight class ----------------------------------------------- */
4712
4713 static int brightness_update_status(struct backlight_device *bd)
4714 {
4715         /* it is the backlight class's job (caller) to handle
4716          * EINTR and other errors properly */
4717         return brightness_set(
4718                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4719                  bd->props.power == FB_BLANK_UNBLANK) ?
4720                                 bd->props.brightness : 0);
4721 }
4722
4723 static int brightness_get(struct backlight_device *bd)
4724 {
4725         int status, res;
4726
4727         res = brightness_get_raw(&status);
4728         if (res < 0)
4729                 return 0; /* FIXME: teach backlight about error handling */
4730
4731         return status & TP_EC_BACKLIGHT_LVLMSK;
4732 }
4733
4734 static struct backlight_ops ibm_backlight_data = {
4735         .get_brightness = brightness_get,
4736         .update_status  = brightness_update_status,
4737 };
4738
4739 /* --------------------------------------------------------------------- */
4740
4741 static int __init brightness_init(struct ibm_init_struct *iibm)
4742 {
4743         int b;
4744
4745         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4746
4747         mutex_init(&brightness_mutex);
4748
4749         /*
4750          * We always attempt to detect acpi support, so as to switch
4751          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4752          * going to publish a backlight interface
4753          */
4754         b = tpacpi_check_std_acpi_brightness_support();
4755         if (b > 0) {
4756                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4757                         printk(TPACPI_NOTICE
4758                                "Lenovo BIOS switched to ACPI backlight "
4759                                "control mode\n");
4760                 }
4761                 if (brightness_enable > 1) {
4762                         printk(TPACPI_NOTICE
4763                                "standard ACPI backlight interface "
4764                                "available, not loading native one...\n");
4765                         return 1;
4766                 }
4767         }
4768
4769         if (!brightness_enable) {
4770                 dbg_printk(TPACPI_DBG_INIT,
4771                            "brightness support disabled by "
4772                            "module parameter\n");
4773                 return 1;
4774         }
4775
4776         if (b > 16) {
4777                 printk(TPACPI_ERR
4778                        "Unsupported brightness interface, "
4779                        "please contact %s\n", TPACPI_MAIL);
4780                 return 1;
4781         }
4782         if (b == 16)
4783                 tp_features.bright_16levels = 1;
4784
4785         if (!brightness_mode) {
4786                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4787                         brightness_mode = 2;
4788                 else
4789                         brightness_mode = 3;
4790
4791                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4792                         brightness_mode);
4793         }
4794
4795         if (brightness_mode > 3)
4796                 return -EINVAL;
4797
4798         if (brightness_get_raw(&b) < 0)
4799                 return 1;
4800
4801         if (tp_features.bright_16levels)
4802                 printk(TPACPI_INFO
4803                        "detected a 16-level brightness capable ThinkPad\n");
4804
4805         ibm_backlight_device = backlight_device_register(
4806                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4807                                         &ibm_backlight_data);
4808         if (IS_ERR(ibm_backlight_device)) {
4809                 printk(TPACPI_ERR "Could not register backlight device\n");
4810                 return PTR_ERR(ibm_backlight_device);
4811         }
4812         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4813
4814         ibm_backlight_device->props.max_brightness =
4815                                 (tp_features.bright_16levels)? 15 : 7;
4816         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4817         backlight_update_status(ibm_backlight_device);
4818
4819         return 0;
4820 }
4821
4822 static void brightness_exit(void)
4823 {
4824         if (ibm_backlight_device) {
4825                 vdbg_printk(TPACPI_DBG_EXIT,
4826                             "calling backlight_device_unregister()\n");
4827                 backlight_device_unregister(ibm_backlight_device);
4828         }
4829 }
4830
4831 static int brightness_read(char *p)
4832 {
4833         int len = 0;
4834         int level;
4835
4836         level = brightness_get(NULL);
4837         if (level < 0) {
4838                 len += sprintf(p + len, "level:\t\tunreadable\n");
4839         } else {
4840                 len += sprintf(p + len, "level:\t\t%d\n", level);
4841                 len += sprintf(p + len, "commands:\tup, down\n");
4842                 len += sprintf(p + len, "commands:\tlevel <level>"
4843                                " (<level> is 0-%d)\n",
4844                                (tp_features.bright_16levels) ? 15 : 7);
4845         }
4846
4847         return len;
4848 }
4849
4850 static int brightness_write(char *buf)
4851 {
4852         int level;
4853         int rc;
4854         char *cmd;
4855         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4856
4857         level = brightness_get(NULL);
4858         if (level < 0)
4859                 return level;
4860
4861         while ((cmd = next_cmd(&buf))) {
4862                 if (strlencmp(cmd, "up") == 0) {
4863                         if (level < max_level)
4864                                 level++;
4865                 } else if (strlencmp(cmd, "down") == 0) {
4866                         if (level > 0)
4867                                 level--;
4868                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4869                            level >= 0 && level <= max_level) {
4870                         /* new level set */
4871                 } else
4872                         return -EINVAL;
4873         }
4874
4875         /*
4876          * Now we know what the final level should be, so we try to set it.
4877          * Doing it this way makes the syscall restartable in case of EINTR
4878          */
4879         rc = brightness_set(level);
4880         return (rc == -EINTR)? ERESTARTSYS : rc;
4881 }
4882
4883 static struct ibm_struct brightness_driver_data = {
4884         .name = "brightness",
4885         .read = brightness_read,
4886         .write = brightness_write,
4887         .exit = brightness_exit,
4888 };
4889
4890 /*************************************************************************
4891  * Volume subdriver
4892  */
4893
4894 static int volume_offset = 0x30;
4895
4896 static int volume_read(char *p)
4897 {
4898         int len = 0;
4899         u8 level;
4900
4901         if (!acpi_ec_read(volume_offset, &level)) {
4902                 len += sprintf(p + len, "level:\t\tunreadable\n");
4903         } else {
4904                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4905                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4906                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4907                 len += sprintf(p + len, "commands:\tlevel <level>"
4908                                " (<level> is 0-15)\n");
4909         }
4910
4911         return len;
4912 }
4913
4914 static int volume_write(char *buf)
4915 {
4916         int cmos_cmd, inc, i;
4917         u8 level, mute;
4918         int new_level, new_mute;
4919         char *cmd;
4920
4921         while ((cmd = next_cmd(&buf))) {
4922                 if (!acpi_ec_read(volume_offset, &level))
4923                         return -EIO;
4924                 new_mute = mute = level & 0x40;
4925                 new_level = level = level & 0xf;
4926
4927                 if (strlencmp(cmd, "up") == 0) {
4928                         if (mute)
4929                                 new_mute = 0;
4930                         else
4931                                 new_level = level == 15 ? 15 : level + 1;
4932                 } else if (strlencmp(cmd, "down") == 0) {
4933                         if (mute)
4934                                 new_mute = 0;
4935                         else
4936                                 new_level = level == 0 ? 0 : level - 1;
4937                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4938                            new_level >= 0 && new_level <= 15) {
4939                         /* new_level set */
4940                 } else if (strlencmp(cmd, "mute") == 0) {
4941                         new_mute = 0x40;
4942                 } else
4943                         return -EINVAL;
4944
4945                 if (new_level != level) {
4946                         /* mute doesn't change */
4947
4948                         cmos_cmd = (new_level > level) ?
4949                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4950                         inc = new_level > level ? 1 : -1;
4951
4952                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4953                                      !acpi_ec_write(volume_offset, level)))
4954                                 return -EIO;
4955
4956                         for (i = level; i != new_level; i += inc)
4957                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4958                                     !acpi_ec_write(volume_offset, i + inc))
4959                                         return -EIO;
4960
4961                         if (mute &&
4962                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4963                              !acpi_ec_write(volume_offset, new_level + mute))) {
4964                                 return -EIO;
4965                         }
4966                 }
4967
4968                 if (new_mute != mute) {
4969                         /* level doesn't change */
4970
4971                         cmos_cmd = (new_mute) ?
4972                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4973
4974                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4975                             !acpi_ec_write(volume_offset, level + new_mute))
4976                                 return -EIO;
4977                 }
4978         }
4979
4980         return 0;
4981 }
4982
4983 static struct ibm_struct volume_driver_data = {
4984         .name = "volume",
4985         .read = volume_read,
4986         .write = volume_write,
4987 };
4988
4989 /*************************************************************************
4990  * Fan subdriver
4991  */
4992
4993 /*
4994  * FAN ACCESS MODES
4995  *
4996  * TPACPI_FAN_RD_ACPI_GFAN:
4997  *      ACPI GFAN method: returns fan level
4998  *
4999  *      see TPACPI_FAN_WR_ACPI_SFAN
5000  *      EC 0x2f (HFSP) not available if GFAN exists
5001  *
5002  * TPACPI_FAN_WR_ACPI_SFAN:
5003  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5004  *
5005  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5006  *      it for writing.
5007  *
5008  * TPACPI_FAN_WR_TPEC:
5009  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5010  *      Supported on almost all ThinkPads
5011  *
5012  *      Fan speed changes of any sort (including those caused by the
5013  *      disengaged mode) are usually done slowly by the firmware as the
5014  *      maximum ammount of fan duty cycle change per second seems to be
5015  *      limited.
5016  *
5017  *      Reading is not available if GFAN exists.
5018  *      Writing is not available if SFAN exists.
5019  *
5020  *      Bits
5021  *       7      automatic mode engaged;
5022  *              (default operation mode of the ThinkPad)
5023  *              fan level is ignored in this mode.
5024  *       6      full speed mode (takes precedence over bit 7);
5025  *              not available on all thinkpads.  May disable
5026  *              the tachometer while the fan controller ramps up
5027  *              the speed (which can take up to a few *minutes*).
5028  *              Speeds up fan to 100% duty-cycle, which is far above
5029  *              the standard RPM levels.  It is not impossible that
5030  *              it could cause hardware damage.
5031  *      5-3     unused in some models.  Extra bits for fan level
5032  *              in others, but still useless as all values above
5033  *              7 map to the same speed as level 7 in these models.
5034  *      2-0     fan level (0..7 usually)
5035  *                      0x00 = stop
5036  *                      0x07 = max (set when temperatures critical)
5037  *              Some ThinkPads may have other levels, see
5038  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5039  *
5040  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5041  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5042  *      does so, its initial value is meaningless (0x07).
5043  *
5044  *      For firmware bugs, refer to:
5045  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5046  *
5047  *      ----
5048  *
5049  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5050  *      Main fan tachometer reading (in RPM)
5051  *
5052  *      This register is present on all ThinkPads with a new-style EC, and
5053  *      it is known not to be present on the A21m/e, and T22, as there is
5054  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5055  *      ThinkPads from this same time period (and earlier) probably lack the
5056  *      tachometer as well.
5057  *
5058  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5059  *      was never fixed by IBM to report the EC firmware version string
5060  *      probably support the tachometer (like the early X models), so
5061  *      detecting it is quite hard.  We need more data to know for sure.
5062  *
5063  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5064  *      might result.
5065  *
5066  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5067  *      mode.
5068  *
5069  *      For firmware bugs, refer to:
5070  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5071  *
5072  * TPACPI_FAN_WR_ACPI_FANS:
5073  *      ThinkPad X31, X40, X41.  Not available in the X60.
5074  *
5075  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5076  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5077  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5078  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5079  *
5080  *      The speeds are stored on handles
5081  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5082  *
5083  *      There are three default speed sets, acessible as handles:
5084  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5085  *
5086  *      ACPI DSDT switches which set is in use depending on various
5087  *      factors.
5088  *
5089  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5090  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5091  *      but the ACPI tables just mention level 7.
5092  */
5093
5094 enum {                                  /* Fan control constants */
5095         fan_status_offset = 0x2f,       /* EC register 0x2f */
5096         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5097                                          * 0x84 must be read before 0x85 */
5098
5099         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5100         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5101
5102         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5103 };
5104
5105 enum fan_status_access_mode {
5106         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5107         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5108         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5109 };
5110
5111 enum fan_control_access_mode {
5112         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5113         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5114         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5115         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5116 };
5117
5118 enum fan_control_commands {
5119         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5120         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5121         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5122                                                  * and also watchdog cmd */
5123 };
5124
5125 static int fan_control_allowed;
5126
5127 static enum fan_status_access_mode fan_status_access_mode;
5128 static enum fan_control_access_mode fan_control_access_mode;
5129 static enum fan_control_commands fan_control_commands;
5130
5131 static u8 fan_control_initial_status;
5132 static u8 fan_control_desired_level;
5133 static int fan_watchdog_maxinterval;
5134
5135 static struct mutex fan_mutex;
5136
5137 static void fan_watchdog_fire(struct work_struct *ignored);
5138 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5139
5140 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5141 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5142            "\\FSPD",            /* 600e/x, 770e, 770x */
5143            );                   /* all others */
5144 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5145            "JFNS",              /* 770x-JL */
5146            );                   /* all others */
5147
5148 /*
5149  * Call with fan_mutex held
5150  */
5151 static void fan_update_desired_level(u8 status)
5152 {
5153         if ((status &
5154              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5155                 if (status > 7)
5156                         fan_control_desired_level = 7;
5157                 else
5158                         fan_control_desired_level = status;
5159         }
5160 }
5161
5162 static int fan_get_status(u8 *status)
5163 {
5164         u8 s;
5165
5166         /* TODO:
5167          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5168
5169         switch (fan_status_access_mode) {
5170         case TPACPI_FAN_RD_ACPI_GFAN:
5171                 /* 570, 600e/x, 770e, 770x */
5172
5173                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5174                         return -EIO;
5175
5176                 if (likely(status))
5177                         *status = s & 0x07;
5178
5179                 break;
5180
5181         case TPACPI_FAN_RD_TPEC:
5182                 /* all except 570, 600e/x, 770e, 770x */
5183                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5184                         return -EIO;
5185
5186                 if (likely(status))
5187                         *status = s;
5188
5189                 break;
5190
5191         default:
5192                 return -ENXIO;
5193         }
5194
5195         return 0;
5196 }
5197
5198 static int fan_get_status_safe(u8 *status)
5199 {
5200         int rc;
5201         u8 s;
5202
5203         if (mutex_lock_interruptible(&fan_mutex))
5204                 return -ERESTARTSYS;
5205         rc = fan_get_status(&s);
5206         if (!rc)
5207                 fan_update_desired_level(s);
5208         mutex_unlock(&fan_mutex);
5209
5210         if (status)
5211                 *status = s;
5212
5213         return rc;
5214 }
5215
5216 static int fan_get_speed(unsigned int *speed)
5217 {
5218         u8 hi, lo;
5219
5220         switch (fan_status_access_mode) {
5221         case TPACPI_FAN_RD_TPEC:
5222                 /* all except 570, 600e/x, 770e, 770x */
5223                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5224                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5225                         return -EIO;
5226
5227                 if (likely(speed))
5228                         *speed = (hi << 8) | lo;
5229
5230                 break;
5231
5232         default:
5233                 return -ENXIO;
5234         }
5235
5236         return 0;
5237 }
5238
5239 static int fan_set_level(int level)
5240 {
5241         if (!fan_control_allowed)
5242                 return -EPERM;
5243
5244         switch (fan_control_access_mode) {
5245         case TPACPI_FAN_WR_ACPI_SFAN:
5246                 if (level >= 0 && level <= 7) {
5247                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5248                                 return -EIO;
5249                 } else
5250                         return -EINVAL;
5251                 break;
5252
5253         case TPACPI_FAN_WR_ACPI_FANS:
5254         case TPACPI_FAN_WR_TPEC:
5255                 if ((level != TP_EC_FAN_AUTO) &&
5256                     (level != TP_EC_FAN_FULLSPEED) &&
5257                     ((level < 0) || (level > 7)))
5258                         return -EINVAL;
5259
5260                 /* safety net should the EC not support AUTO
5261                  * or FULLSPEED mode bits and just ignore them */
5262                 if (level & TP_EC_FAN_FULLSPEED)
5263                         level |= 7;     /* safety min speed 7 */
5264                 else if (level & TP_EC_FAN_AUTO)
5265                         level |= 4;     /* safety min speed 4 */
5266
5267                 if (!acpi_ec_write(fan_status_offset, level))
5268                         return -EIO;
5269                 else
5270                         tp_features.fan_ctrl_status_undef = 0;
5271                 break;
5272
5273         default:
5274                 return -ENXIO;
5275         }
5276         return 0;
5277 }
5278
5279 static int fan_set_level_safe(int level)
5280 {
5281         int rc;
5282
5283         if (!fan_control_allowed)
5284                 return -EPERM;
5285
5286         if (mutex_lock_interruptible(&fan_mutex))
5287                 return -ERESTARTSYS;
5288
5289         if (level == TPACPI_FAN_LAST_LEVEL)
5290                 level = fan_control_desired_level;
5291
5292         rc = fan_set_level(level);
5293         if (!rc)
5294                 fan_update_desired_level(level);
5295
5296         mutex_unlock(&fan_mutex);
5297         return rc;
5298 }
5299
5300 static int fan_set_enable(void)
5301 {
5302         u8 s;
5303         int rc;
5304
5305         if (!fan_control_allowed)
5306                 return -EPERM;
5307
5308         if (mutex_lock_interruptible(&fan_mutex))
5309                 return -ERESTARTSYS;
5310
5311         switch (fan_control_access_mode) {
5312         case TPACPI_FAN_WR_ACPI_FANS:
5313         case TPACPI_FAN_WR_TPEC:
5314                 rc = fan_get_status(&s);
5315                 if (rc < 0)
5316                         break;
5317
5318                 /* Don't go out of emergency fan mode */
5319                 if (s != 7) {
5320                         s &= 0x07;
5321                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5322                 }
5323
5324                 if (!acpi_ec_write(fan_status_offset, s))
5325                         rc = -EIO;
5326                 else {
5327                         tp_features.fan_ctrl_status_undef = 0;
5328                         rc = 0;
5329                 }
5330                 break;
5331
5332         case TPACPI_FAN_WR_ACPI_SFAN:
5333                 rc = fan_get_status(&s);
5334                 if (rc < 0)
5335                         break;
5336
5337                 s &= 0x07;
5338
5339                 /* Set fan to at least level 4 */
5340                 s |= 4;
5341
5342                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5343                         rc = -EIO;
5344                 else
5345                         rc = 0;
5346                 break;
5347
5348         default:
5349                 rc = -ENXIO;
5350         }
5351
5352         mutex_unlock(&fan_mutex);
5353         return rc;
5354 }
5355
5356 static int fan_set_disable(void)
5357 {
5358         int rc;
5359
5360         if (!fan_control_allowed)
5361                 return -EPERM;
5362
5363         if (mutex_lock_interruptible(&fan_mutex))
5364                 return -ERESTARTSYS;
5365
5366         rc = 0;
5367         switch (fan_control_access_mode) {
5368         case TPACPI_FAN_WR_ACPI_FANS:
5369         case TPACPI_FAN_WR_TPEC:
5370                 if (!acpi_ec_write(fan_status_offset, 0x00))
5371                         rc = -EIO;
5372                 else {
5373                         fan_control_desired_level = 0;
5374                         tp_features.fan_ctrl_status_undef = 0;
5375                 }
5376                 break;
5377
5378         case TPACPI_FAN_WR_ACPI_SFAN:
5379                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5380                         rc = -EIO;
5381                 else
5382                         fan_control_desired_level = 0;
5383                 break;
5384
5385         default:
5386                 rc = -ENXIO;
5387         }
5388
5389
5390         mutex_unlock(&fan_mutex);
5391         return rc;
5392 }
5393
5394 static int fan_set_speed(int speed)
5395 {
5396         int rc;
5397
5398         if (!fan_control_allowed)
5399                 return -EPERM;
5400
5401         if (mutex_lock_interruptible(&fan_mutex))
5402                 return -ERESTARTSYS;
5403
5404         rc = 0;
5405         switch (fan_control_access_mode) {
5406         case TPACPI_FAN_WR_ACPI_FANS:
5407                 if (speed >= 0 && speed <= 65535) {
5408                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5409                                         speed, speed, speed))
5410                                 rc = -EIO;
5411                 } else
5412                         rc = -EINVAL;
5413                 break;
5414
5415         default:
5416                 rc = -ENXIO;
5417         }
5418
5419         mutex_unlock(&fan_mutex);
5420         return rc;
5421 }
5422
5423 static void fan_watchdog_reset(void)
5424 {
5425         static int fan_watchdog_active;
5426
5427         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5428                 return;
5429
5430         if (fan_watchdog_active)
5431                 cancel_delayed_work(&fan_watchdog_task);
5432
5433         if (fan_watchdog_maxinterval > 0 &&
5434             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5435                 fan_watchdog_active = 1;
5436                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5437                                 msecs_to_jiffies(fan_watchdog_maxinterval
5438                                                  * 1000))) {
5439                         printk(TPACPI_ERR
5440                                "failed to queue the fan watchdog, "
5441                                "watchdog will not trigger\n");
5442                 }
5443         } else
5444                 fan_watchdog_active = 0;
5445 }
5446
5447 static void fan_watchdog_fire(struct work_struct *ignored)
5448 {
5449         int rc;
5450
5451         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5452                 return;
5453
5454         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5455         rc = fan_set_enable();
5456         if (rc < 0) {
5457                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5458                         "will try again later...\n", -rc);
5459                 /* reschedule for later */
5460                 fan_watchdog_reset();
5461         }
5462 }
5463
5464 /*
5465  * SYSFS fan layout: hwmon compatible (device)
5466  *
5467  * pwm*_enable:
5468  *      0: "disengaged" mode
5469  *      1: manual mode
5470  *      2: native EC "auto" mode (recommended, hardware default)
5471  *
5472  * pwm*: set speed in manual mode, ignored otherwise.
5473  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5474  *      interpolation.
5475  *
5476  * fan*_input: tachometer reading, RPM
5477  *
5478  *
5479  * SYSFS fan layout: extensions
5480  *
5481  * fan_watchdog (driver):
5482  *      fan watchdog interval in seconds, 0 disables (default), max 120
5483  */
5484
5485 /* sysfs fan pwm1_enable ----------------------------------------------- */
5486 static ssize_t fan_pwm1_enable_show(struct device *dev,
5487                                     struct device_attribute *attr,
5488                                     char *buf)
5489 {
5490         int res, mode;
5491         u8 status;
5492
5493         res = fan_get_status_safe(&status);
5494         if (res)
5495                 return res;
5496
5497         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5498                 if (status != fan_control_initial_status) {
5499                         tp_features.fan_ctrl_status_undef = 0;
5500                 } else {
5501                         /* Return most likely status. In fact, it
5502                          * might be the only possible status */
5503                         status = TP_EC_FAN_AUTO;
5504                 }
5505         }
5506
5507         if (status & TP_EC_FAN_FULLSPEED) {
5508                 mode = 0;
5509         } else if (status & TP_EC_FAN_AUTO) {
5510                 mode = 2;
5511         } else
5512                 mode = 1;
5513
5514         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5515 }
5516
5517 static ssize_t fan_pwm1_enable_store(struct device *dev,
5518                                      struct device_attribute *attr,
5519                                      const char *buf, size_t count)
5520 {
5521         unsigned long t;
5522         int res, level;
5523
5524         if (parse_strtoul(buf, 2, &t))
5525                 return -EINVAL;
5526
5527         switch (t) {
5528         case 0:
5529                 level = TP_EC_FAN_FULLSPEED;
5530                 break;
5531         case 1:
5532                 level = TPACPI_FAN_LAST_LEVEL;
5533                 break;
5534         case 2:
5535                 level = TP_EC_FAN_AUTO;
5536                 break;
5537         case 3:
5538                 /* reserved for software-controlled auto mode */
5539                 return -ENOSYS;
5540         default:
5541                 return -EINVAL;
5542         }
5543
5544         res = fan_set_level_safe(level);
5545         if (res == -ENXIO)
5546                 return -EINVAL;
5547         else if (res < 0)
5548                 return res;
5549
5550         fan_watchdog_reset();
5551
5552         return count;
5553 }
5554
5555 static struct device_attribute dev_attr_fan_pwm1_enable =
5556         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5557                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5558
5559 /* sysfs fan pwm1 ------------------------------------------------------ */
5560 static ssize_t fan_pwm1_show(struct device *dev,
5561                              struct device_attribute *attr,
5562                              char *buf)
5563 {
5564         int res;
5565         u8 status;
5566
5567         res = fan_get_status_safe(&status);
5568         if (res)
5569                 return res;
5570
5571         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5572                 if (status != fan_control_initial_status) {
5573                         tp_features.fan_ctrl_status_undef = 0;
5574                 } else {
5575                         status = TP_EC_FAN_AUTO;
5576                 }
5577         }
5578
5579         if ((status &
5580              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5581                 status = fan_control_desired_level;
5582
5583         if (status > 7)
5584                 status = 7;
5585
5586         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5587 }
5588
5589 static ssize_t fan_pwm1_store(struct device *dev,
5590                               struct device_attribute *attr,
5591                               const char *buf, size_t count)
5592 {
5593         unsigned long s;
5594         int rc;
5595         u8 status, newlevel;
5596
5597         if (parse_strtoul(buf, 255, &s))
5598                 return -EINVAL;
5599
5600         /* scale down from 0-255 to 0-7 */
5601         newlevel = (s >> 5) & 0x07;
5602
5603         if (mutex_lock_interruptible(&fan_mutex))
5604                 return -ERESTARTSYS;
5605
5606         rc = fan_get_status(&status);
5607         if (!rc && (status &
5608                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5609                 rc = fan_set_level(newlevel);
5610                 if (rc == -ENXIO)
5611                         rc = -EINVAL;
5612                 else if (!rc) {
5613                         fan_update_desired_level(newlevel);
5614                         fan_watchdog_reset();
5615                 }
5616         }
5617
5618         mutex_unlock(&fan_mutex);
5619         return (rc)? rc : count;
5620 }
5621
5622 static struct device_attribute dev_attr_fan_pwm1 =
5623         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5624                 fan_pwm1_show, fan_pwm1_store);
5625
5626 /* sysfs fan fan1_input ------------------------------------------------ */
5627 static ssize_t fan_fan1_input_show(struct device *dev,
5628                            struct device_attribute *attr,
5629                            char *buf)
5630 {
5631         int res;
5632         unsigned int speed;
5633
5634         res = fan_get_speed(&speed);
5635         if (res < 0)
5636                 return res;
5637
5638         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5639 }
5640
5641 static struct device_attribute dev_attr_fan_fan1_input =
5642         __ATTR(fan1_input, S_IRUGO,
5643                 fan_fan1_input_show, NULL);
5644
5645 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5646 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5647                                      char *buf)
5648 {
5649         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5650 }
5651
5652 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5653                                       const char *buf, size_t count)
5654 {
5655         unsigned long t;
5656
5657         if (parse_strtoul(buf, 120, &t))
5658                 return -EINVAL;
5659
5660         if (!fan_control_allowed)
5661                 return -EPERM;
5662
5663         fan_watchdog_maxinterval = t;
5664         fan_watchdog_reset();
5665
5666         return count;
5667 }
5668
5669 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5670                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5671
5672 /* --------------------------------------------------------------------- */
5673 static struct attribute *fan_attributes[] = {
5674         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5675         &dev_attr_fan_fan1_input.attr,
5676         NULL
5677 };
5678
5679 static const struct attribute_group fan_attr_group = {
5680         .attrs = fan_attributes,
5681 };
5682
5683 static int __init fan_init(struct ibm_init_struct *iibm)
5684 {
5685         int rc;
5686
5687         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5688
5689         mutex_init(&fan_mutex);
5690         fan_status_access_mode = TPACPI_FAN_NONE;
5691         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5692         fan_control_commands = 0;
5693         fan_watchdog_maxinterval = 0;
5694         tp_features.fan_ctrl_status_undef = 0;
5695         fan_control_desired_level = 7;
5696
5697         TPACPI_ACPIHANDLE_INIT(fans);
5698         TPACPI_ACPIHANDLE_INIT(gfan);
5699         TPACPI_ACPIHANDLE_INIT(sfan);
5700
5701         if (gfan_handle) {
5702                 /* 570, 600e/x, 770e, 770x */
5703                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5704         } else {
5705                 /* all other ThinkPads: note that even old-style
5706                  * ThinkPad ECs supports the fan control register */
5707                 if (likely(acpi_ec_read(fan_status_offset,
5708                                         &fan_control_initial_status))) {
5709                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5710
5711                         /* In some ThinkPads, neither the EC nor the ACPI
5712                          * DSDT initialize the fan status, and it ends up
5713                          * being set to 0x07 when it *could* be either
5714                          * 0x07 or 0x80.
5715                          *
5716                          * Enable for TP-1Y (T43), TP-78 (R51e),
5717                          * TP-76 (R52), TP-70 (T43, R52), which are known
5718                          * to be buggy. */
5719                         if (fan_control_initial_status == 0x07) {
5720                                 switch (thinkpad_id.ec_model) {
5721                                 case 0x5931: /* TP-1Y */
5722                                 case 0x3837: /* TP-78 */
5723                                 case 0x3637: /* TP-76 */
5724                                 case 0x3037: /* TP-70 */
5725                                         printk(TPACPI_NOTICE
5726                                                "fan_init: initial fan status "
5727                                                "is unknown, assuming it is "
5728                                                "in auto mode\n");
5729                                         tp_features.fan_ctrl_status_undef = 1;
5730                                         ;;
5731                                 }
5732                         }
5733                 } else {
5734                         printk(TPACPI_ERR
5735                                "ThinkPad ACPI EC access misbehaving, "
5736                                "fan status and control unavailable\n");
5737                         return 1;
5738                 }
5739         }
5740
5741         if (sfan_handle) {
5742                 /* 570, 770x-JL */
5743                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5744                 fan_control_commands |=
5745                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5746         } else {
5747                 if (!gfan_handle) {
5748                         /* gfan without sfan means no fan control */
5749                         /* all other models implement TP EC 0x2f control */
5750
5751                         if (fans_handle) {
5752                                 /* X31, X40, X41 */
5753                                 fan_control_access_mode =
5754                                     TPACPI_FAN_WR_ACPI_FANS;
5755                                 fan_control_commands |=
5756                                     TPACPI_FAN_CMD_SPEED |
5757                                     TPACPI_FAN_CMD_LEVEL |
5758                                     TPACPI_FAN_CMD_ENABLE;
5759                         } else {
5760                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5761                                 fan_control_commands |=
5762                                     TPACPI_FAN_CMD_LEVEL |
5763                                     TPACPI_FAN_CMD_ENABLE;
5764                         }
5765                 }
5766         }
5767
5768         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5769                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5770                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5771                 fan_status_access_mode, fan_control_access_mode);
5772
5773         /* fan control master switch */
5774         if (!fan_control_allowed) {
5775                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5776                 fan_control_commands = 0;
5777                 dbg_printk(TPACPI_DBG_INIT,
5778                            "fan control features disabled by parameter\n");
5779         }
5780
5781         /* update fan_control_desired_level */
5782         if (fan_status_access_mode != TPACPI_FAN_NONE)
5783                 fan_get_status_safe(NULL);
5784
5785         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5786             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5787                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5788                                          &fan_attr_group);
5789                 if (rc < 0)
5790                         return rc;
5791
5792                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5793                                         &driver_attr_fan_watchdog);
5794                 if (rc < 0) {
5795                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5796                                         &fan_attr_group);
5797                         return rc;
5798                 }
5799                 return 0;
5800         } else
5801                 return 1;
5802 }
5803
5804 static void fan_exit(void)
5805 {
5806         vdbg_printk(TPACPI_DBG_EXIT,
5807                     "cancelling any pending fan watchdog tasks\n");
5808
5809         /* FIXME: can we really do this unconditionally? */
5810         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5811         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5812                            &driver_attr_fan_watchdog);
5813
5814         cancel_delayed_work(&fan_watchdog_task);
5815         flush_workqueue(tpacpi_wq);
5816 }
5817
5818 static int fan_read(char *p)
5819 {
5820         int len = 0;
5821         int rc;
5822         u8 status;
5823         unsigned int speed = 0;
5824
5825         switch (fan_status_access_mode) {
5826         case TPACPI_FAN_RD_ACPI_GFAN:
5827                 /* 570, 600e/x, 770e, 770x */
5828                 rc = fan_get_status_safe(&status);
5829                 if (rc < 0)
5830                         return rc;
5831
5832                 len += sprintf(p + len, "status:\t\t%s\n"
5833                                "level:\t\t%d\n",
5834                                (status != 0) ? "enabled" : "disabled", status);
5835                 break;
5836
5837         case TPACPI_FAN_RD_TPEC:
5838                 /* all except 570, 600e/x, 770e, 770x */
5839                 rc = fan_get_status_safe(&status);
5840                 if (rc < 0)
5841                         return rc;
5842
5843                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5844                         if (status != fan_control_initial_status)
5845                                 tp_features.fan_ctrl_status_undef = 0;
5846                         else
5847                                 /* Return most likely status. In fact, it
5848                                  * might be the only possible status */
5849                                 status = TP_EC_FAN_AUTO;
5850                 }
5851
5852                 len += sprintf(p + len, "status:\t\t%s\n",
5853                                (status != 0) ? "enabled" : "disabled");
5854
5855                 rc = fan_get_speed(&speed);
5856                 if (rc < 0)
5857                         return rc;
5858
5859                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5860
5861                 if (status & TP_EC_FAN_FULLSPEED)
5862                         /* Disengaged mode takes precedence */
5863                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5864                 else if (status & TP_EC_FAN_AUTO)
5865                         len += sprintf(p + len, "level:\t\tauto\n");
5866                 else
5867                         len += sprintf(p + len, "level:\t\t%d\n", status);
5868                 break;
5869
5870         case TPACPI_FAN_NONE:
5871         default:
5872                 len += sprintf(p + len, "status:\t\tnot supported\n");
5873         }
5874
5875         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5876                 len += sprintf(p + len, "commands:\tlevel <level>");
5877
5878                 switch (fan_control_access_mode) {
5879                 case TPACPI_FAN_WR_ACPI_SFAN:
5880                         len += sprintf(p + len, " (<level> is 0-7)\n");
5881                         break;
5882
5883                 default:
5884                         len += sprintf(p + len, " (<level> is 0-7, "
5885                                        "auto, disengaged, full-speed)\n");
5886                         break;
5887                 }
5888         }
5889
5890         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5891                 len += sprintf(p + len, "commands:\tenable, disable\n"
5892                                "commands:\twatchdog <timeout> (<timeout> "
5893                                "is 0 (off), 1-120 (seconds))\n");
5894
5895         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5896                 len += sprintf(p + len, "commands:\tspeed <speed>"
5897                                " (<speed> is 0-65535)\n");
5898
5899         return len;
5900 }
5901
5902 static int fan_write_cmd_level(const char *cmd, int *rc)
5903 {
5904         int level;
5905
5906         if (strlencmp(cmd, "level auto") == 0)
5907                 level = TP_EC_FAN_AUTO;
5908         else if ((strlencmp(cmd, "level disengaged") == 0) |
5909                         (strlencmp(cmd, "level full-speed") == 0))
5910                 level = TP_EC_FAN_FULLSPEED;
5911         else if (sscanf(cmd, "level %d", &level) != 1)
5912                 return 0;
5913
5914         *rc = fan_set_level_safe(level);
5915         if (*rc == -ENXIO)
5916                 printk(TPACPI_ERR "level command accepted for unsupported "
5917                        "access mode %d", fan_control_access_mode);
5918
5919         return 1;
5920 }
5921
5922 static int fan_write_cmd_enable(const char *cmd, int *rc)
5923 {
5924         if (strlencmp(cmd, "enable") != 0)
5925                 return 0;
5926
5927         *rc = fan_set_enable();
5928         if (*rc == -ENXIO)
5929                 printk(TPACPI_ERR "enable command accepted for unsupported "
5930                        "access mode %d", fan_control_access_mode);
5931
5932         return 1;
5933 }
5934
5935 static int fan_write_cmd_disable(const char *cmd, int *rc)
5936 {
5937         if (strlencmp(cmd, "disable") != 0)
5938                 return 0;
5939
5940         *rc = fan_set_disable();
5941         if (*rc == -ENXIO)
5942                 printk(TPACPI_ERR "disable command accepted for unsupported "
5943                        "access mode %d", fan_control_access_mode);
5944
5945         return 1;
5946 }
5947
5948 static int fan_write_cmd_speed(const char *cmd, int *rc)
5949 {
5950         int speed;
5951
5952         /* TODO:
5953          * Support speed <low> <medium> <high> ? */
5954
5955         if (sscanf(cmd, "speed %d", &speed) != 1)
5956                 return 0;
5957
5958         *rc = fan_set_speed(speed);
5959         if (*rc == -ENXIO)
5960                 printk(TPACPI_ERR "speed command accepted for unsupported "
5961                        "access mode %d", fan_control_access_mode);
5962
5963         return 1;
5964 }
5965
5966 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5967 {
5968         int interval;
5969
5970         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5971                 return 0;
5972
5973         if (interval < 0 || interval > 120)
5974                 *rc = -EINVAL;
5975         else
5976                 fan_watchdog_maxinterval = interval;
5977
5978         return 1;
5979 }
5980
5981 static int fan_write(char *buf)
5982 {
5983         char *cmd;
5984         int rc = 0;
5985
5986         while (!rc && (cmd = next_cmd(&buf))) {
5987                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5988                       fan_write_cmd_level(cmd, &rc)) &&
5989                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5990                       (fan_write_cmd_enable(cmd, &rc) ||
5991                        fan_write_cmd_disable(cmd, &rc) ||
5992                        fan_write_cmd_watchdog(cmd, &rc))) &&
5993                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5994                       fan_write_cmd_speed(cmd, &rc))
5995                     )
5996                         rc = -EINVAL;
5997                 else if (!rc)
5998                         fan_watchdog_reset();
5999         }
6000
6001         return rc;
6002 }
6003
6004 static struct ibm_struct fan_driver_data = {
6005         .name = "fan",
6006         .read = fan_read,
6007         .write = fan_write,
6008         .exit = fan_exit,
6009 };
6010
6011 /****************************************************************************
6012  ****************************************************************************
6013  *
6014  * Infrastructure
6015  *
6016  ****************************************************************************
6017  ****************************************************************************/
6018
6019 /* sysfs name ---------------------------------------------------------- */
6020 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6021                            struct device_attribute *attr,
6022                            char *buf)
6023 {
6024         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6025 }
6026
6027 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6028         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6029
6030 /* --------------------------------------------------------------------- */
6031
6032 /* /proc support */
6033 static struct proc_dir_entry *proc_dir;
6034
6035 /*
6036  * Module and infrastructure proble, init and exit handling
6037  */
6038
6039 static int force_load;
6040
6041 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6042 static const char * __init str_supported(int is_supported)
6043 {
6044         static char text_unsupported[] __initdata = "not supported";
6045
6046         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6047 }
6048 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6049
6050 static void ibm_exit(struct ibm_struct *ibm)
6051 {
6052         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6053
6054         list_del_init(&ibm->all_drivers);
6055
6056         if (ibm->flags.acpi_notify_installed) {
6057                 dbg_printk(TPACPI_DBG_EXIT,
6058                         "%s: acpi_remove_notify_handler\n", ibm->name);
6059                 BUG_ON(!ibm->acpi);
6060                 acpi_remove_notify_handler(*ibm->acpi->handle,
6061                                            ibm->acpi->type,
6062                                            dispatch_acpi_notify);
6063                 ibm->flags.acpi_notify_installed = 0;
6064                 ibm->flags.acpi_notify_installed = 0;
6065         }
6066
6067         if (ibm->flags.proc_created) {
6068                 dbg_printk(TPACPI_DBG_EXIT,
6069                         "%s: remove_proc_entry\n", ibm->name);
6070                 remove_proc_entry(ibm->name, proc_dir);
6071                 ibm->flags.proc_created = 0;
6072         }
6073
6074         if (ibm->flags.acpi_driver_registered) {
6075                 dbg_printk(TPACPI_DBG_EXIT,
6076                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6077                 BUG_ON(!ibm->acpi);
6078                 acpi_bus_unregister_driver(ibm->acpi->driver);
6079                 kfree(ibm->acpi->driver);
6080                 ibm->acpi->driver = NULL;
6081                 ibm->flags.acpi_driver_registered = 0;
6082         }
6083
6084         if (ibm->flags.init_called && ibm->exit) {
6085                 ibm->exit();
6086                 ibm->flags.init_called = 0;
6087         }
6088
6089         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6090 }
6091
6092 static int __init ibm_init(struct ibm_init_struct *iibm)
6093 {
6094         int ret;
6095         struct ibm_struct *ibm = iibm->data;
6096         struct proc_dir_entry *entry;
6097
6098         BUG_ON(ibm == NULL);
6099
6100         INIT_LIST_HEAD(&ibm->all_drivers);
6101
6102         if (ibm->flags.experimental && !experimental)
6103                 return 0;
6104
6105         dbg_printk(TPACPI_DBG_INIT,
6106                 "probing for %s\n", ibm->name);
6107
6108         if (iibm->init) {
6109                 ret = iibm->init(iibm);
6110                 if (ret > 0)
6111                         return 0;       /* probe failed */
6112                 if (ret)
6113                         return ret;
6114
6115                 ibm->flags.init_called = 1;
6116         }
6117
6118         if (ibm->acpi) {
6119                 if (ibm->acpi->hid) {
6120                         ret = register_tpacpi_subdriver(ibm);
6121                         if (ret)
6122                                 goto err_out;
6123                 }
6124
6125                 if (ibm->acpi->notify) {
6126                         ret = setup_acpi_notify(ibm);
6127                         if (ret == -ENODEV) {
6128                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6129                                         ibm->name);
6130                                 ret = 0;
6131                                 goto err_out;
6132                         }
6133                         if (ret < 0)
6134                                 goto err_out;
6135                 }
6136         }
6137
6138         dbg_printk(TPACPI_DBG_INIT,
6139                 "%s installed\n", ibm->name);
6140
6141         if (ibm->read) {
6142                 entry = create_proc_entry(ibm->name,
6143                                           S_IFREG | S_IRUGO | S_IWUSR,
6144                                           proc_dir);
6145                 if (!entry) {
6146                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6147                                ibm->name);
6148                         ret = -ENODEV;
6149                         goto err_out;
6150                 }
6151                 entry->owner = THIS_MODULE;
6152                 entry->data = ibm;
6153                 entry->read_proc = &dispatch_procfs_read;
6154                 if (ibm->write)
6155                         entry->write_proc = &dispatch_procfs_write;
6156                 ibm->flags.proc_created = 1;
6157         }
6158
6159         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6160
6161         return 0;
6162
6163 err_out:
6164         dbg_printk(TPACPI_DBG_INIT,
6165                 "%s: at error exit path with result %d\n",
6166                 ibm->name, ret);
6167
6168         ibm_exit(ibm);
6169         return (ret < 0)? ret : 0;
6170 }
6171
6172 /* Probing */
6173
6174 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6175 {
6176         const struct dmi_device *dev = NULL;
6177         char ec_fw_string[18];
6178
6179         if (!tp)
6180                 return;
6181
6182         memset(tp, 0, sizeof(*tp));
6183
6184         if (dmi_name_in_vendors("IBM"))
6185                 tp->vendor = PCI_VENDOR_ID_IBM;
6186         else if (dmi_name_in_vendors("LENOVO"))
6187                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6188         else
6189                 return;
6190
6191         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
6192                                         GFP_KERNEL);
6193         if (!tp->bios_version_str)
6194                 return;
6195         tp->bios_model = tp->bios_version_str[0]
6196                          | (tp->bios_version_str[1] << 8);
6197
6198         /*
6199          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6200          * X32 or newer, all Z series;  Some models must have an
6201          * up-to-date BIOS or they will not be detected.
6202          *
6203          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6204          */
6205         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6206                 if (sscanf(dev->name,
6207                            "IBM ThinkPad Embedded Controller -[%17c",
6208                            ec_fw_string) == 1) {
6209                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6210                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6211
6212                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6213                         tp->ec_model = ec_fw_string[0]
6214                                         | (ec_fw_string[1] << 8);
6215                         break;
6216                 }
6217         }
6218
6219         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6220                                         GFP_KERNEL);
6221         if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6222                 kfree(tp->model_str);
6223                 tp->model_str = NULL;
6224         }
6225
6226         tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6227                                         GFP_KERNEL);
6228 }
6229
6230 static int __init probe_for_thinkpad(void)
6231 {
6232         int is_thinkpad;
6233
6234         if (acpi_disabled)
6235                 return -ENODEV;
6236
6237         /*
6238          * Non-ancient models have better DMI tagging, but very old models
6239          * don't.
6240          */
6241         is_thinkpad = (thinkpad_id.model_str != NULL);
6242
6243         /* ec is required because many other handles are relative to it */
6244         TPACPI_ACPIHANDLE_INIT(ec);
6245         if (!ec_handle) {
6246                 if (is_thinkpad)
6247                         printk(TPACPI_ERR
6248                                 "Not yet supported ThinkPad detected!\n");
6249                 return -ENODEV;
6250         }
6251
6252         /*
6253          * Risks a regression on very old machines, but reduces potential
6254          * false positives a damn great deal
6255          */
6256         if (!is_thinkpad)
6257                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6258
6259         if (!is_thinkpad && !force_load)
6260                 return -ENODEV;
6261
6262         return 0;
6263 }
6264
6265
6266 /* Module init, exit, parameters */
6267
6268 static struct ibm_init_struct ibms_init[] __initdata = {
6269         {
6270                 .init = thinkpad_acpi_driver_init,
6271                 .data = &thinkpad_acpi_driver_data,
6272         },
6273         {
6274                 .init = hotkey_init,
6275                 .data = &hotkey_driver_data,
6276         },
6277         {
6278                 .init = bluetooth_init,
6279                 .data = &bluetooth_driver_data,
6280         },
6281         {
6282                 .init = wan_init,
6283                 .data = &wan_driver_data,
6284         },
6285 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6286         {
6287                 .init = video_init,
6288                 .data = &video_driver_data,
6289         },
6290 #endif
6291         {
6292                 .init = light_init,
6293                 .data = &light_driver_data,
6294         },
6295 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6296         {
6297                 .init = dock_init,
6298                 .data = &dock_driver_data[0],
6299         },
6300         {
6301                 .init = dock_init2,
6302                 .data = &dock_driver_data[1],
6303         },
6304 #endif
6305 #ifdef CONFIG_THINKPAD_ACPI_BAY
6306         {
6307                 .init = bay_init,
6308                 .data = &bay_driver_data,
6309         },
6310 #endif
6311         {
6312                 .init = cmos_init,
6313                 .data = &cmos_driver_data,
6314         },
6315         {
6316                 .init = led_init,
6317                 .data = &led_driver_data,
6318         },
6319         {
6320                 .init = beep_init,
6321                 .data = &beep_driver_data,
6322         },
6323         {
6324                 .init = thermal_init,
6325                 .data = &thermal_driver_data,
6326         },
6327         {
6328                 .data = &ecdump_driver_data,
6329         },
6330         {
6331                 .init = brightness_init,
6332                 .data = &brightness_driver_data,
6333         },
6334         {
6335                 .data = &volume_driver_data,
6336         },
6337         {
6338                 .init = fan_init,
6339                 .data = &fan_driver_data,
6340         },
6341 };
6342
6343 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6344 {
6345         unsigned int i;
6346         struct ibm_struct *ibm;
6347
6348         if (!kp || !kp->name || !val)
6349                 return -EINVAL;
6350
6351         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6352                 ibm = ibms_init[i].data;
6353                 WARN_ON(ibm == NULL);
6354
6355                 if (!ibm || !ibm->name)
6356                         continue;
6357
6358                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6359                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6360                                 return -ENOSPC;
6361                         strcpy(ibms_init[i].param, val);
6362                         strcat(ibms_init[i].param, ",");
6363                         return 0;
6364                 }
6365         }
6366
6367         return -EINVAL;
6368 }
6369
6370 module_param(experimental, int, 0);
6371 MODULE_PARM_DESC(experimental,
6372                  "Enables experimental features when non-zero");
6373
6374 module_param_named(debug, dbg_level, uint, 0);
6375 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6376
6377 module_param(force_load, bool, 0);
6378 MODULE_PARM_DESC(force_load,
6379                  "Attempts to load the driver even on a "
6380                  "mis-identified ThinkPad when true");
6381
6382 module_param_named(fan_control, fan_control_allowed, bool, 0);
6383 MODULE_PARM_DESC(fan_control,
6384                  "Enables setting fan parameters features when true");
6385
6386 module_param_named(brightness_mode, brightness_mode, int, 0);
6387 MODULE_PARM_DESC(brightness_mode,
6388                  "Selects brightness control strategy: "
6389                  "0=auto, 1=EC, 2=CMOS, 3=both");
6390
6391 module_param(brightness_enable, uint, 0);
6392 MODULE_PARM_DESC(brightness_enable,
6393                  "Enables backlight control when 1, disables when 0");
6394
6395 module_param(hotkey_report_mode, uint, 0);
6396 MODULE_PARM_DESC(hotkey_report_mode,
6397                  "used for backwards compatibility with userspace, "
6398                  "see documentation");
6399
6400 #define TPACPI_PARAM(feature) \
6401         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6402         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6403                          "at module load, see documentation")
6404
6405 TPACPI_PARAM(hotkey);
6406 TPACPI_PARAM(bluetooth);
6407 TPACPI_PARAM(video);
6408 TPACPI_PARAM(light);
6409 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6410 TPACPI_PARAM(dock);
6411 #endif
6412 #ifdef CONFIG_THINKPAD_ACPI_BAY
6413 TPACPI_PARAM(bay);
6414 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6415 TPACPI_PARAM(cmos);
6416 TPACPI_PARAM(led);
6417 TPACPI_PARAM(beep);
6418 TPACPI_PARAM(ecdump);
6419 TPACPI_PARAM(brightness);
6420 TPACPI_PARAM(volume);
6421 TPACPI_PARAM(fan);
6422
6423 static void thinkpad_acpi_module_exit(void)
6424 {
6425         struct ibm_struct *ibm, *itmp;
6426
6427         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6428
6429         list_for_each_entry_safe_reverse(ibm, itmp,
6430                                          &tpacpi_all_drivers,
6431                                          all_drivers) {
6432                 ibm_exit(ibm);
6433         }
6434
6435         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6436
6437         if (tpacpi_inputdev) {
6438                 if (tp_features.input_device_registered)
6439                         input_unregister_device(tpacpi_inputdev);
6440                 else
6441                         input_free_device(tpacpi_inputdev);
6442         }
6443
6444         if (tpacpi_hwmon)
6445                 hwmon_device_unregister(tpacpi_hwmon);
6446
6447         if (tp_features.sensors_pdev_attrs_registered)
6448                 device_remove_file(&tpacpi_sensors_pdev->dev,
6449                                    &dev_attr_thinkpad_acpi_pdev_name);
6450         if (tpacpi_sensors_pdev)
6451                 platform_device_unregister(tpacpi_sensors_pdev);
6452         if (tpacpi_pdev)
6453                 platform_device_unregister(tpacpi_pdev);
6454
6455         if (tp_features.sensors_pdrv_attrs_registered)
6456                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6457         if (tp_features.platform_drv_attrs_registered)
6458                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6459
6460         if (tp_features.sensors_pdrv_registered)
6461                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6462
6463         if (tp_features.platform_drv_registered)
6464                 platform_driver_unregister(&tpacpi_pdriver);
6465
6466         if (proc_dir)
6467                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6468
6469         if (tpacpi_wq)
6470                 destroy_workqueue(tpacpi_wq);
6471
6472         kfree(thinkpad_id.bios_version_str);
6473         kfree(thinkpad_id.ec_version_str);
6474         kfree(thinkpad_id.model_str);
6475 }
6476
6477
6478 static int __init thinkpad_acpi_module_init(void)
6479 {
6480         int ret, i;
6481
6482         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6483
6484         /* Parameter checking */
6485         if (hotkey_report_mode > 2)
6486                 return -EINVAL;
6487
6488         /* Driver-level probe */
6489
6490         get_thinkpad_model_data(&thinkpad_id);
6491         ret = probe_for_thinkpad();
6492         if (ret) {
6493                 thinkpad_acpi_module_exit();
6494                 return ret;
6495         }
6496
6497         /* Driver initialization */
6498
6499         TPACPI_ACPIHANDLE_INIT(ecrd);
6500         TPACPI_ACPIHANDLE_INIT(ecwr);
6501
6502         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6503         if (!tpacpi_wq) {
6504                 thinkpad_acpi_module_exit();
6505                 return -ENOMEM;
6506         }
6507
6508         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6509         if (!proc_dir) {
6510                 printk(TPACPI_ERR
6511                        "unable to create proc dir " TPACPI_PROC_DIR);
6512                 thinkpad_acpi_module_exit();
6513                 return -ENODEV;
6514         }
6515         proc_dir->owner = THIS_MODULE;
6516
6517         ret = platform_driver_register(&tpacpi_pdriver);
6518         if (ret) {
6519                 printk(TPACPI_ERR
6520                        "unable to register main platform driver\n");
6521                 thinkpad_acpi_module_exit();
6522                 return ret;
6523         }
6524         tp_features.platform_drv_registered = 1;
6525
6526         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6527         if (ret) {
6528                 printk(TPACPI_ERR
6529                        "unable to register hwmon platform driver\n");
6530                 thinkpad_acpi_module_exit();
6531                 return ret;
6532         }
6533         tp_features.sensors_pdrv_registered = 1;
6534
6535         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6536         if (!ret) {
6537                 tp_features.platform_drv_attrs_registered = 1;
6538                 ret = tpacpi_create_driver_attributes(
6539                                         &tpacpi_hwmon_pdriver.driver);
6540         }
6541         if (ret) {
6542                 printk(TPACPI_ERR
6543                        "unable to create sysfs driver attributes\n");
6544                 thinkpad_acpi_module_exit();
6545                 return ret;
6546         }
6547         tp_features.sensors_pdrv_attrs_registered = 1;
6548
6549
6550         /* Device initialization */
6551         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6552                                                         NULL, 0);
6553         if (IS_ERR(tpacpi_pdev)) {
6554                 ret = PTR_ERR(tpacpi_pdev);
6555                 tpacpi_pdev = NULL;
6556                 printk(TPACPI_ERR "unable to register platform device\n");
6557                 thinkpad_acpi_module_exit();
6558                 return ret;
6559         }
6560         tpacpi_sensors_pdev = platform_device_register_simple(
6561                                                 TPACPI_HWMON_DRVR_NAME,
6562                                                 -1, NULL, 0);
6563         if (IS_ERR(tpacpi_sensors_pdev)) {
6564                 ret = PTR_ERR(tpacpi_sensors_pdev);
6565                 tpacpi_sensors_pdev = NULL;
6566                 printk(TPACPI_ERR
6567                        "unable to register hwmon platform device\n");
6568                 thinkpad_acpi_module_exit();
6569                 return ret;
6570         }
6571         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6572                                  &dev_attr_thinkpad_acpi_pdev_name);
6573         if (ret) {
6574                 printk(TPACPI_ERR
6575                        "unable to create sysfs hwmon device attributes\n");
6576                 thinkpad_acpi_module_exit();
6577                 return ret;
6578         }
6579         tp_features.sensors_pdev_attrs_registered = 1;
6580         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6581         if (IS_ERR(tpacpi_hwmon)) {
6582                 ret = PTR_ERR(tpacpi_hwmon);
6583                 tpacpi_hwmon = NULL;
6584                 printk(TPACPI_ERR "unable to register hwmon device\n");
6585                 thinkpad_acpi_module_exit();
6586                 return ret;
6587         }
6588         mutex_init(&tpacpi_inputdev_send_mutex);
6589         tpacpi_inputdev = input_allocate_device();
6590         if (!tpacpi_inputdev) {
6591                 printk(TPACPI_ERR "unable to allocate input device\n");
6592                 thinkpad_acpi_module_exit();
6593                 return -ENOMEM;
6594         } else {
6595                 /* Prepare input device, but don't register */
6596                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6597                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6598                 tpacpi_inputdev->id.bustype = BUS_HOST;
6599                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6600                                                 thinkpad_id.vendor :
6601                                                 PCI_VENDOR_ID_IBM;
6602                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6603                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6604         }
6605         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6606                 ret = ibm_init(&ibms_init[i]);
6607                 if (ret >= 0 && *ibms_init[i].param)
6608                         ret = ibms_init[i].data->write(ibms_init[i].param);
6609                 if (ret < 0) {
6610                         thinkpad_acpi_module_exit();
6611                         return ret;
6612                 }
6613         }
6614         ret = input_register_device(tpacpi_inputdev);
6615         if (ret < 0) {
6616                 printk(TPACPI_ERR "unable to register input device\n");
6617                 thinkpad_acpi_module_exit();
6618                 return ret;
6619         } else {
6620                 tp_features.input_device_registered = 1;
6621         }
6622
6623         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6624         return 0;
6625 }
6626
6627 /* Please remove this in year 2009 */
6628 MODULE_ALIAS("ibm_acpi");
6629
6630 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6631
6632 /*
6633  * DMI matching for module autoloading
6634  *
6635  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6636  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6637  *
6638  * Only models listed in thinkwiki will be supported, so add yours
6639  * if it is not there yet.
6640  */
6641 #define IBM_BIOS_MODULE_ALIAS(__type) \
6642         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6643
6644 /* Non-ancient thinkpads */
6645 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6646 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6647
6648 /* Ancient thinkpad BIOSes have to be identified by
6649  * BIOS type or model number, and there are far less
6650  * BIOS types than model numbers... */
6651 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6652 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6653 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6654
6655 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6656 MODULE_DESCRIPTION(TPACPI_DESC);
6657 MODULE_VERSION(TPACPI_VERSION);
6658 MODULE_LICENSE("GPL");
6659
6660 module_init(thinkpad_acpi_module_init);
6661 module_exit(thinkpad_acpi_module_exit);