drivers/usb/atm/cxacru.c

   1 /******************************************************************************
   2  *  cxacru.c  -  driver for USB ADSL modems based on
   3  *               Conexant AccessRunner chipset
   4  *
   5  *  Copyright (C) 2004 David Woodhouse, Duncan Sands, Roman Kagan
   6  *  Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
   7  *  Copyright (C) 2007 Simon Arlott
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License as published by the Free
  11  *  Software Foundation; either version 2 of the License, or (at your option)
  12  *  any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful, but WITHOUT
  15  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  *  more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along with
  20  *  this program; if not, write to the Free Software Foundation, Inc., 59
  21  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  *
  23  ******************************************************************************/
  24
  25 /*
  26  *  Credit is due for Josep Comas, who created the original patch to speedtch.c
  27  *  to support the different padding used by the AccessRunner (now generalized
  28  *  into usbatm), and the userspace firmware loading utility.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/kernel.h>
  34 #include <linux/timer.h>
  35 #include <linux/errno.h>
  36 #include <linux/slab.h>
  37 #include <linux/init.h>
  38 #include <linux/device.h>
  39 #include <linux/firmware.h>
  40 #include <linux/mutex.h>
  41
  42 #include "usbatm.h"
  43
  44 #define DRIVER_AUTHOR   "Roman Kagan, David Woodhouse, Duncan Sands, Simon Arlott"
  45 #define DRIVER_VERSION  "0.3"
  46 #define DRIVER_DESC     "Conexant AccessRunner ADSL USB modem driver"
  47
  48 static const char cxacru_driver_name[] = "cxacru";
  49
  50 #define CXACRU_EP_CMD           0x01    /* Bulk/interrupt in/out */
  51 #define CXACRU_EP_DATA          0x02    /* Bulk in/out */
  52
  53 #define CMD_PACKET_SIZE         64      /* Should be maxpacket(ep)? */
  54
  55 /* Addresses */
  56 #define PLLFCLK_ADDR    0x00350068
  57 #define PLLBCLK_ADDR    0x0035006c
  58 #define SDRAMEN_ADDR    0x00350010
  59 #define FW_ADDR         0x00801000
  60 #define BR_ADDR         0x00180600
  61 #define SIG_ADDR        0x00180500
  62 #define BR_STACK_ADDR   0x00187f10
  63
  64 /* Values */
  65 #define SDRAM_ENA       0x1
  66
  67 #define CMD_TIMEOUT     2000    /* msecs */
  68 #define POLL_INTERVAL   1       /* secs */
  69
  70 /* commands for interaction with the modem through the control channel before
  71  * firmware is loaded  */
  72 enum cxacru_fw_request {
  73         FW_CMD_ERR,
  74         FW_GET_VER,
  75         FW_READ_MEM,
  76         FW_WRITE_MEM,
  77         FW_RMW_MEM,
  78         FW_CHECKSUM_MEM,
  79         FW_GOTO_MEM,
  80 };
  81
  82 /* commands for interaction with the modem through the control channel once
  83  * firmware is loaded  */
  84 enum cxacru_cm_request {
  85         CM_REQUEST_UNDEFINED = 0x80,
  86         CM_REQUEST_TEST,
  87         CM_REQUEST_CHIP_GET_MAC_ADDRESS,
  88         CM_REQUEST_CHIP_GET_DP_VERSIONS,
  89         CM_REQUEST_CHIP_ADSL_LINE_START,
  90         CM_REQUEST_CHIP_ADSL_LINE_STOP,
  91         CM_REQUEST_CHIP_ADSL_LINE_GET_STATUS,
  92         CM_REQUEST_CHIP_ADSL_LINE_GET_SPEED,
  93         CM_REQUEST_CARD_INFO_GET,
  94         CM_REQUEST_CARD_DATA_GET,
  95         CM_REQUEST_CARD_DATA_SET,
  96         CM_REQUEST_COMMAND_HW_IO,
  97         CM_REQUEST_INTERFACE_HW_IO,
  98         CM_REQUEST_CARD_SERIAL_DATA_PATH_GET,
  99         CM_REQUEST_CARD_SERIAL_DATA_PATH_SET,
 100         CM_REQUEST_CARD_CONTROLLER_VERSION_GET,
 101         CM_REQUEST_CARD_GET_STATUS,
 102         CM_REQUEST_CARD_GET_MAC_ADDRESS,
 103         CM_REQUEST_CARD_GET_DATA_LINK_STATUS,
 104         CM_REQUEST_MAX,
 105 };
 106
 107 /* reply codes to the commands above */
 108 enum cxacru_cm_status {
 109         CM_STATUS_UNDEFINED,
 110         CM_STATUS_SUCCESS,
 111         CM_STATUS_ERROR,
 112         CM_STATUS_UNSUPPORTED,
 113         CM_STATUS_UNIMPLEMENTED,
 114         CM_STATUS_PARAMETER_ERROR,
 115         CM_STATUS_DBG_LOOPBACK,
 116         CM_STATUS_MAX,
 117 };
 118
 119 /* indices into CARD_INFO_GET return array */
 120 enum cxacru_info_idx {
 121         CXINF_DOWNSTREAM_RATE,
 122         CXINF_UPSTREAM_RATE,
 123         CXINF_LINK_STATUS,
 124         CXINF_LINE_STATUS,
 125         CXINF_MAC_ADDRESS_HIGH,
 126         CXINF_MAC_ADDRESS_LOW,
 127         CXINF_UPSTREAM_SNR_MARGIN,
 128         CXINF_DOWNSTREAM_SNR_MARGIN,
 129         CXINF_UPSTREAM_ATTENUATION,
 130         CXINF_DOWNSTREAM_ATTENUATION,
 131         CXINF_TRANSMITTER_POWER,
 132         CXINF_UPSTREAM_BITS_PER_FRAME,
 133         CXINF_DOWNSTREAM_BITS_PER_FRAME,
 134         CXINF_STARTUP_ATTEMPTS,
 135         CXINF_UPSTREAM_CRC_ERRORS,
 136         CXINF_DOWNSTREAM_CRC_ERRORS,
 137         CXINF_UPSTREAM_FEC_ERRORS,
 138         CXINF_DOWNSTREAM_FEC_ERRORS,
 139         CXINF_UPSTREAM_HEC_ERRORS,
 140         CXINF_DOWNSTREAM_HEC_ERRORS,
 141         CXINF_LINE_STARTABLE,
 142         CXINF_MODULATION,
 143         CXINF_ADSL_HEADEND,
 144         CXINF_ADSL_HEADEND_ENVIRONMENT,
 145         CXINF_CONTROLLER_VERSION,
 146         /* dunno what the missing two mean */
 147         CXINF_MAX = 0x1c,
 148 };
 149
 150 enum cxacru_poll_state {
 151         CXPOLL_STOPPING,
 152         CXPOLL_STOPPED,
 153         CXPOLL_POLLING,
 154         CXPOLL_SHUTDOWN
 155 };
 156
 157 struct cxacru_modem_type {
 158         u32 pll_f_clk;
 159         u32 pll_b_clk;
 160         int boot_rom_patch;
 161 };
 162
 163 struct cxacru_data {
 164         struct usbatm_data *usbatm;
 165
 166         const struct cxacru_modem_type *modem_type;
 167
 168         int line_status;
 169         struct mutex adsl_state_serialize;
 170         int adsl_status;
 171         struct delayed_work poll_work;
 172         u32 card_info[CXINF_MAX];
 173         struct mutex poll_state_serialize;
 174         int poll_state;
 175
 176         /* contol handles */
 177         struct mutex cm_serialize;
 178         u8 *rcv_buf;
 179         u8 *snd_buf;
 180         struct urb *rcv_urb;
 181         struct urb *snd_urb;
 182         struct completion rcv_done;
 183         struct completion snd_done;
 184 };
 185
 186 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 187         u8 *wdata, int wsize, u8 *rdata, int rsize);
 188 static void cxacru_poll_status(struct work_struct *work);
 189
 190 /* Card info exported through sysfs */
 191 #define CXACRU__ATTR_INIT(_name) \
 192 static DEVICE_ATTR(_name, S_IRUGO, cxacru_sysfs_show_##_name, NULL)
 193
 194 #define CXACRU_CMD_INIT(_name) \
 195 static DEVICE_ATTR(_name, S_IWUSR | S_IRUGO, \
 196         cxacru_sysfs_show_##_name, cxacru_sysfs_store_##_name)
 197
 198 #define CXACRU_ATTR_INIT(_value, _type, _name) \
 199 static ssize_t cxacru_sysfs_show_##_name(struct device *dev, \
 200         struct device_attribute *attr, char *buf) \
 201 { \
 202         struct usb_interface *intf = to_usb_interface(dev); \
 203         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf); \
 204         struct cxacru_data *instance = usbatm_instance->driver_data; \
 205         return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
 206 } \
 207 CXACRU__ATTR_INIT(_name)
 208
 209 #define CXACRU_ATTR_CREATE(_v, _t, _name) CXACRU_DEVICE_CREATE_FILE(_name)
 210 #define CXACRU_CMD_CREATE(_name)          CXACRU_DEVICE_CREATE_FILE(_name)
 211 #define CXACRU__ATTR_CREATE(_name)        CXACRU_DEVICE_CREATE_FILE(_name)
 212
 213 #define CXACRU_ATTR_REMOVE(_v, _t, _name) CXACRU_DEVICE_REMOVE_FILE(_name)
 214 #define CXACRU_CMD_REMOVE(_name)          CXACRU_DEVICE_REMOVE_FILE(_name)
 215 #define CXACRU__ATTR_REMOVE(_name)        CXACRU_DEVICE_REMOVE_FILE(_name)
 216
 217 static ssize_t cxacru_sysfs_showattr_u32(u32 value, char *buf)
 218 {
 219         return snprintf(buf, PAGE_SIZE, "%u\n", value);
 220 }
 221
 222 static ssize_t cxacru_sysfs_showattr_s8(s8 value, char *buf)
 223 {
 224         return snprintf(buf, PAGE_SIZE, "%d\n", value);
 225 }
 226
 227 static ssize_t cxacru_sysfs_showattr_dB(s16 value, char *buf)
 228 {
 229         if (unlikely(value < 0)) {
 230                 return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
 231                                                 value / 100, -value % 100);
 232         } else {
 233                 return snprintf(buf, PAGE_SIZE, "%d.%02u\n",
 234                                                 value / 100, value % 100);
 235         }
 236 }
 237
 238 static ssize_t cxacru_sysfs_showattr_bool(u32 value, char *buf)
 239 {
 240         switch (value) {
 241         case 0: return snprintf(buf, PAGE_SIZE, "no\n");
 242         case 1: return snprintf(buf, PAGE_SIZE, "yes\n");
 243         default: return 0;
 244         }
 245 }
 246
 247 static ssize_t cxacru_sysfs_showattr_LINK(u32 value, char *buf)
 248 {
 249         switch (value) {
 250         case 1: return snprintf(buf, PAGE_SIZE, "not connected\n");
 251         case 2: return snprintf(buf, PAGE_SIZE, "connected\n");
 252         case 3: return snprintf(buf, PAGE_SIZE, "lost\n");
 253         default: return snprintf(buf, PAGE_SIZE, "unknown (%u)\n", value);
 254         }
 255 }
 256
 257 static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
 258 {
 259         switch (value) {
 260         case 0: return snprintf(buf, PAGE_SIZE, "down\n");
 261         case 1: return snprintf(buf, PAGE_SIZE, "attempting to activate\n");
 262         case 2: return snprintf(buf, PAGE_SIZE, "training\n");
 263         case 3: return snprintf(buf, PAGE_SIZE, "channel analysis\n");
 264         case 4: return snprintf(buf, PAGE_SIZE, "exchange\n");
 265         case 5: return snprintf(buf, PAGE_SIZE, "up\n");
 266         case 6: return snprintf(buf, PAGE_SIZE, "waiting\n");
 267         case 7: return snprintf(buf, PAGE_SIZE, "initialising\n");
 268         default: return snprintf(buf, PAGE_SIZE, "unknown (%u)\n", value);
 269         }
 270 }
 271
 272 static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
 273 {
 274         switch (value) {
 275         case 0: return 0;
 276         case 1: return snprintf(buf, PAGE_SIZE, "ANSI T1.413\n");
 277         case 2: return snprintf(buf, PAGE_SIZE, "ITU-T G.992.1 (G.DMT)\n");
 278         case 3: return snprintf(buf, PAGE_SIZE, "ITU-T G.992.2 (G.LITE)\n");
 279         default: return snprintf(buf, PAGE_SIZE, "unknown (%u)\n", value);
 280         }
 281 }
 282
 283 /*
 284  * This could use MAC_ADDRESS_HIGH and MAC_ADDRESS_LOW, but since
 285  * this data is already in atm_dev there's no point.
 286  *
 287  * MAC_ADDRESS_HIGH = 0x????5544
 288  * MAC_ADDRESS_LOW  = 0x33221100
 289  * Where 00-55 are bytes 0-5 of the MAC.
 290  */
 291 static ssize_t cxacru_sysfs_show_mac_address(struct device *dev,
 292         struct device_attribute *attr, char *buf)
 293 {
 294         struct usb_interface *intf = to_usb_interface(dev);
 295         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 296         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 297
 298         return snprintf(buf, PAGE_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x\n",
 299                         atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2],
 300                         atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]);
 301 }
 302
 303 static ssize_t cxacru_sysfs_show_adsl_state(struct device *dev,
 304         struct device_attribute *attr, char *buf)
 305 {
 306         struct usb_interface *intf = to_usb_interface(dev);
 307         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 308         struct cxacru_data *instance = usbatm_instance->driver_data;
 309         u32 value = instance->card_info[CXINF_LINE_STARTABLE];
 310
 311         switch (value) {
 312         case 0: return snprintf(buf, PAGE_SIZE, "running\n");
 313         case 1: return snprintf(buf, PAGE_SIZE, "stopped\n");
 314         default: return snprintf(buf, PAGE_SIZE, "unknown (%u)\n", value);
 315         }
 316 }
 317
 318 static ssize_t cxacru_sysfs_store_adsl_state(struct device *dev,
 319         struct device_attribute *attr, const char *buf, size_t count)
 320 {
 321         struct usb_interface *intf = to_usb_interface(dev);
 322         struct usbatm_data *usbatm_instance = usb_get_intfdata(intf);
 323         struct cxacru_data *instance = usbatm_instance->driver_data;
 324         int ret;
 325         int poll = -1;
 326         char str_cmd[8];
 327         int len = strlen(buf);
 328
 329         if (!capable(CAP_NET_ADMIN))
 330                 return -EACCES;
 331
 332         ret = sscanf(buf, "%7s", str_cmd);
 333         if (ret != 1)
 334                 return -EINVAL;
 335         ret = 0;
 336
 337         if (mutex_lock_interruptible(&instance->adsl_state_serialize))
 338                 return -ERESTARTSYS;
 339
 340         if (!strcmp(str_cmd, "stop") || !strcmp(str_cmd, "restart")) {
 341                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_STOP, NULL, 0, NULL, 0);
 342                 if (ret < 0) {
 343                         atm_err(usbatm_instance, "change adsl state:"
 344                                 " CHIP_ADSL_LINE_STOP returned %d\n", ret);
 345
 346                         ret = -EIO;
 347                 } else {
 348                         ret = len;
 349                         poll = CXPOLL_STOPPED;
 350                 }
 351         }
 352
 353         /* Line status is only updated every second
 354          * and the device appears to only react to
 355          * START/STOP every second too. Wait 1.5s to
 356          * be sure that restart will have an effect. */
 357         if (!strcmp(str_cmd, "restart"))
 358                 msleep(1500);
 359
 360         if (!strcmp(str_cmd, "start") || !strcmp(str_cmd, "restart")) {
 361                 ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 362                 if (ret < 0) {
 363                         atm_err(usbatm_instance, "change adsl state:"
 364                                 " CHIP_ADSL_LINE_START returned %d\n", ret);
 365
 366                         ret = -EIO;
 367                 } else {
 368                         ret = len;
 369                         poll = CXPOLL_POLLING;
 370                 }
 371         }
 372
 373         if (!strcmp(str_cmd, "poll")) {
 374                 ret = len;
 375                 poll = CXPOLL_POLLING;
 376         }
 377
 378         if (ret == 0) {
 379                 ret = -EINVAL;
 380                 poll = -1;
 381         }
 382
 383         if (poll == CXPOLL_POLLING) {
 384                 mutex_lock(&instance->poll_state_serialize);
 385                 switch (instance->poll_state) {
 386                 case CXPOLL_STOPPED:
 387                         /* start polling */
 388                         instance->poll_state = CXPOLL_POLLING;
 389                         break;
 390
 391                 case CXPOLL_STOPPING:
 392                         /* abort stop request */
 393                         instance->poll_state = CXPOLL_POLLING;
 394                 case CXPOLL_POLLING:
 395                 case CXPOLL_SHUTDOWN:
 396                         /* don't start polling */
 397                         poll = -1;
 398                 }
 399                 mutex_unlock(&instance->poll_state_serialize);
 400         } else if (poll == CXPOLL_STOPPED) {
 401                 mutex_lock(&instance->poll_state_serialize);
 402                 /* request stop */
 403                 if (instance->poll_state == CXPOLL_POLLING)
 404                         instance->poll_state = CXPOLL_STOPPING;
 405                 mutex_unlock(&instance->poll_state_serialize);
 406         }
 407
 408         mutex_unlock(&instance->adsl_state_serialize);
 409
 410         if (poll == CXPOLL_POLLING)
 411                 cxacru_poll_status(&instance->poll_work.work);
 412
 413         return ret;
 414 }
 415
 416 /*
 417  * All device attributes are included in CXACRU_ALL_FILES
 418  * so that the same list can be used multiple times:
 419  *     INIT   (define the device attributes)
 420  *     CREATE (create all the device files)
 421  *     REMOVE (remove all the device files)
 422  *
 423  * With the last two being defined as needed in the functions
 424  * they are used in before calling CXACRU_ALL_FILES()
 425  */
 426 #define CXACRU_ALL_FILES(_action) \
 427 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_RATE,           u32,  downstream_rate); \
 428 CXACRU_ATTR_##_action(CXINF_UPSTREAM_RATE,             u32,  upstream_rate); \
 429 CXACRU_ATTR_##_action(CXINF_LINK_STATUS,               LINK, link_status); \
 430 CXACRU_ATTR_##_action(CXINF_LINE_STATUS,               LINE, line_status); \
 431 CXACRU__ATTR_##_action(                                      mac_address); \
 432 CXACRU_ATTR_##_action(CXINF_UPSTREAM_SNR_MARGIN,       dB,   upstream_snr_margin); \
 433 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_SNR_MARGIN,     dB,   downstream_snr_margin); \
 434 CXACRU_ATTR_##_action(CXINF_UPSTREAM_ATTENUATION,      dB,   upstream_attenuation); \
 435 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_ATTENUATION,    dB,   downstream_attenuation); \
 436 CXACRU_ATTR_##_action(CXINF_TRANSMITTER_POWER,         s8,   transmitter_power); \
 437 CXACRU_ATTR_##_action(CXINF_UPSTREAM_BITS_PER_FRAME,   u32,  upstream_bits_per_frame); \
 438 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_BITS_PER_FRAME, u32,  downstream_bits_per_frame); \
 439 CXACRU_ATTR_##_action(CXINF_STARTUP_ATTEMPTS,          u32,  startup_attempts); \
 440 CXACRU_ATTR_##_action(CXINF_UPSTREAM_CRC_ERRORS,       u32,  upstream_crc_errors); \
 441 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_CRC_ERRORS,     u32,  downstream_crc_errors); \
 442 CXACRU_ATTR_##_action(CXINF_UPSTREAM_FEC_ERRORS,       u32,  upstream_fec_errors); \
 443 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_FEC_ERRORS,     u32,  downstream_fec_errors); \
 444 CXACRU_ATTR_##_action(CXINF_UPSTREAM_HEC_ERRORS,       u32,  upstream_hec_errors); \
 445 CXACRU_ATTR_##_action(CXINF_DOWNSTREAM_HEC_ERRORS,     u32,  downstream_hec_errors); \
 446 CXACRU_ATTR_##_action(CXINF_LINE_STARTABLE,            bool, line_startable); \
 447 CXACRU_ATTR_##_action(CXINF_MODULATION,                MODU, modulation); \
 448 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND,              u32,  adsl_headend); \
 449 CXACRU_ATTR_##_action(CXINF_ADSL_HEADEND_ENVIRONMENT,  u32,  adsl_headend_environment); \
 450 CXACRU_ATTR_##_action(CXINF_CONTROLLER_VERSION,        u32,  adsl_controller_version); \
 451 CXACRU_CMD_##_action(                                        adsl_state);
 452
 453 CXACRU_ALL_FILES(INIT);
 454
 455 /* the following three functions are stolen from drivers/usb/core/message.c */
 456 static void cxacru_blocking_completion(struct urb *urb)
 457 {
 458         complete((struct completion *)urb->context);
 459 }
 460
 461 static void cxacru_timeout_kill(unsigned long data)
 462 {
 463         usb_unlink_urb((struct urb *) data);
 464 }
 465
 466 static int cxacru_start_wait_urb(struct urb *urb, struct completion *done,
 467                                  int* actual_length)
 468 {
 469         struct timer_list timer;
 470         int status;
 471
 472         init_timer(&timer);
 473         timer.expires = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
 474         timer.data = (unsigned long) urb;
 475         timer.function = cxacru_timeout_kill;
 476         add_timer(&timer);
 477         wait_for_completion(done);
 478         status = urb->status;
 479         if (status == -ECONNRESET)
 480                 status = -ETIMEDOUT;
 481         del_timer_sync(&timer);
 482
 483         if (actual_length)
 484                 *actual_length = urb->actual_length;
 485         return status;
 486 }
 487
 488 static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 489                      u8 *wdata, int wsize, u8 *rdata, int rsize)
 490 {
 491         int ret, actlen;
 492         int offb, offd;
 493         const int stride = CMD_PACKET_SIZE - 4;
 494         u8 *wbuf = instance->snd_buf;
 495         u8 *rbuf = instance->rcv_buf;
 496         int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 497         int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;
 498
 499         if (wbuflen > PAGE_SIZE || rbuflen > PAGE_SIZE) {
 500                 dbg("too big transfer requested");
 501                 ret = -ENOMEM;
 502                 goto fail;
 503         }
 504
 505         mutex_lock(&instance->cm_serialize);
 506
 507         /* submit reading urb before the writing one */
 508         init_completion(&instance->rcv_done);
 509         ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);
 510         if (ret < 0) {
 511                 dbg("submitting read urb for cm %#x failed", cm);
 512                 ret = ret;
 513                 goto fail;
 514         }
 515
 516         memset(wbuf, 0, wbuflen);
 517         /* handle wsize == 0 */
 518         wbuf[0] = cm;
 519         for (offb = offd = 0; offd < wsize; offd += stride, offb += CMD_PACKET_SIZE) {
 520                 wbuf[offb] = cm;
 521                 memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));
 522         }
 523
 524         instance->snd_urb->transfer_buffer_length = wbuflen;
 525         init_completion(&instance->snd_done);
 526         ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);
 527         if (ret < 0) {
 528                 dbg("submitting write urb for cm %#x failed", cm);
 529                 ret = ret;
 530                 goto fail;
 531         }
 532
 533         ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);
 534         if (ret < 0) {
 535                 dbg("sending cm %#x failed", cm);
 536                 ret = ret;
 537                 goto fail;
 538         }
 539
 540         ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);
 541         if (ret < 0) {
 542                 dbg("receiving cm %#x failed", cm);
 543                 ret = ret;
 544                 goto fail;
 545         }
 546         if (actlen % CMD_PACKET_SIZE || !actlen) {
 547                 dbg("response is not a positive multiple of %d: %#x",
 548                                 CMD_PACKET_SIZE, actlen);
 549                 ret = -EIO;
 550                 goto fail;
 551         }
 552
 553         /* check the return status and copy the data to the output buffer, if needed */
 554         for (offb = offd = 0; offd < rsize && offb < actlen; offb += CMD_PACKET_SIZE) {
 555                 if (rbuf[offb] != cm) {
 556                         dbg("wrong cm %#x in response", rbuf[offb]);
 557                         ret = -EIO;
 558                         goto fail;
 559                 }
 560                 if (rbuf[offb + 1] != CM_STATUS_SUCCESS) {
 561                         dbg("response failed: %#x", rbuf[offb + 1]);
 562                         ret = -EIO;
 563                         goto fail;
 564                 }
 565                 if (offd >= rsize)
 566                         break;
 567                 memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));
 568                 offd += stride;
 569         }
 570
 571         ret = offd;
 572         dbg("cm %#x", cm);
 573 fail:
 574         mutex_unlock(&instance->cm_serialize);
 575         return ret;
 576 }
 577
 578 static int cxacru_cm_get_array(struct cxacru_data *instance, enum cxacru_cm_request cm,
 579                                u32 *data, int size)
 580 {
 581         int ret, len;
 582         u32 *buf;
 583         int offb, offd;
 584         const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;
 585         int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;
 586
 587         buf = kmalloc(buflen, GFP_KERNEL);
 588         if (!buf)
 589                 return -ENOMEM;
 590
 591         ret = cxacru_cm(instance, cm, NULL, 0, (u8 *) buf, buflen);
 592         if (ret < 0)
 593                 goto cleanup;
 594
 595         /* len > 0 && len % 4 == 0 guaranteed by cxacru_cm() */
 596         len = ret / 4;
 597         for (offb = 0; offb < len; ) {
 598                 int l = le32_to_cpu(buf[offb++]);
 599                 if (l > stride || l > (len - offb) / 2) {
 600                         dbg("wrong data length %#x in response", l);
 601                         ret = -EIO;
 602                         goto cleanup;
 603                 }
 604                 while (l--) {
 605                         offd = le32_to_cpu(buf[offb++]);
 606                         if (offd >= size) {
 607                                 dbg("wrong index %#x in response", offd);
 608                                 ret = -EIO;
 609                                 goto cleanup;
 610                         }
 611                         data[offd] = le32_to_cpu(buf[offb++]);
 612                 }
 613         }
 614
 615         ret = 0;
 616
 617 cleanup:
 618         kfree(buf);
 619         return ret;
 620 }
 621
 622 static int cxacru_card_status(struct cxacru_data *instance)
 623 {
 624         int ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 625         if (ret < 0) {          /* firmware not loaded */
 626                 dbg("cxacru_adsl_start: CARD_GET_STATUS returned %d", ret);
 627                 return ret;
 628         }
 629         return 0;
 630 }
 631
 632 static void cxacru_remove_device_files(struct usbatm_data *usbatm_instance,
 633                 struct atm_dev *atm_dev)
 634 {
 635         struct usb_interface *intf = usbatm_instance->usb_intf;
 636
 637         #define CXACRU_DEVICE_REMOVE_FILE(_name) \
 638                 device_remove_file(&intf->dev, &dev_attr_##_name);
 639         CXACRU_ALL_FILES(REMOVE);
 640         #undef CXACRU_DEVICE_REMOVE_FILE
 641 }
 642
 643 static int cxacru_atm_start(struct usbatm_data *usbatm_instance,
 644                 struct atm_dev *atm_dev)
 645 {
 646         struct cxacru_data *instance = usbatm_instance->driver_data;
 647         struct usb_interface *intf = usbatm_instance->usb_intf;
 648         /*
 649         struct atm_dev *atm_dev = usbatm_instance->atm_dev;
 650         */
 651         int ret;
 652         int start_polling = 1;
 653
 654         dbg("cxacru_atm_start");
 655
 656         /* Read MAC address */
 657         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_MAC_ADDRESS, NULL, 0,
 658                         atm_dev->esi, sizeof(atm_dev->esi));
 659         if (ret < 0) {
 660                 atm_err(usbatm_instance, "cxacru_atm_start: CARD_GET_MAC_ADDRESS returned %d\n", ret);
 661                 return ret;
 662         }
 663
 664         #define CXACRU_DEVICE_CREATE_FILE(_name) \
 665                 ret = device_create_file(&intf->dev, &dev_attr_##_name); \
 666                 if (unlikely(ret)) \
 667                         goto fail_sysfs;
 668         CXACRU_ALL_FILES(CREATE);
 669         #undef CXACRU_DEVICE_CREATE_FILE
 670
 671         /* start ADSL */
 672         mutex_lock(&instance->adsl_state_serialize);
 673         ret = cxacru_cm(instance, CM_REQUEST_CHIP_ADSL_LINE_START, NULL, 0, NULL, 0);
 674         if (ret < 0) {
 675                 atm_err(usbatm_instance, "cxacru_atm_start: CHIP_ADSL_LINE_START returned %d\n", ret);
 676                 mutex_unlock(&instance->adsl_state_serialize);
 677                 return ret;
 678         }
 679
 680         /* Start status polling */
 681         mutex_lock(&instance->poll_state_serialize);
 682         switch (instance->poll_state) {
 683         case CXPOLL_STOPPED:
 684                 /* start polling */
 685                 instance->poll_state = CXPOLL_POLLING;
 686                 break;
 687
 688         case CXPOLL_STOPPING:
 689                 /* abort stop request */
 690                 instance->poll_state = CXPOLL_POLLING;
 691         case CXPOLL_POLLING:
 692         case CXPOLL_SHUTDOWN:
 693                 /* don't start polling */
 694                 start_polling = 0;
 695         }
 696         mutex_unlock(&instance->poll_state_serialize);
 697         mutex_unlock(&instance->adsl_state_serialize);
 698
 699         if (start_polling)
 700                 cxacru_poll_status(&instance->poll_work.work);
 701         return 0;
 702
 703 fail_sysfs:
 704         usb_err(usbatm_instance, "cxacru_atm_start: device_create_file failed (%d)\n", ret);
 705         cxacru_remove_device_files(usbatm_instance, atm_dev);
 706         return ret;
 707 }
 708
 709 static void cxacru_poll_status(struct work_struct *work)
 710 {
 711         struct cxacru_data *instance =
 712                 container_of(work, struct cxacru_data, poll_work.work);
 713         u32 buf[CXINF_MAX] = {};
 714         struct usbatm_data *usbatm = instance->usbatm;
 715         struct atm_dev *atm_dev = usbatm->atm_dev;
 716         int keep_polling = 1;
 717         int ret;
 718
 719         ret = cxacru_cm_get_array(instance, CM_REQUEST_CARD_INFO_GET, buf, CXINF_MAX);
 720         if (ret < 0) {
 721                 if (ret != -ESHUTDOWN)
 722                         atm_warn(usbatm, "poll status: error %d\n", ret);
 723
 724                 mutex_lock(&instance->poll_state_serialize);
 725                 if (instance->poll_state != CXPOLL_SHUTDOWN) {
 726                         instance->poll_state = CXPOLL_STOPPED;
 727
 728                         if (ret != -ESHUTDOWN)
 729                                 atm_warn(usbatm, "polling disabled, set adsl_state"
 730                                                 " to 'start' or 'poll' to resume\n");
 731                 }
 732                 mutex_unlock(&instance->poll_state_serialize);
 733                 goto reschedule;
 734         }
 735
 736         memcpy(instance->card_info, buf, sizeof(instance->card_info));
 737
 738         if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {
 739                 instance->adsl_status = buf[CXINF_LINE_STARTABLE];
 740
 741                 switch (instance->adsl_status) {
 742                 case 0:
 743                         atm_printk(KERN_INFO, usbatm, "ADSL state: running\n");
 744                         break;
 745
 746                 case 1:
 747                         atm_printk(KERN_INFO, usbatm, "ADSL state: stopped\n");
 748                         break;
 749
 750                 default:
 751                         atm_printk(KERN_INFO, usbatm, "Unknown adsl status %02x\n", instance->adsl_status);
 752                         break;
 753                 }
 754         }
 755
 756         if (instance->line_status == buf[CXINF_LINE_STATUS])
 757                 goto reschedule;
 758
 759         instance->line_status = buf[CXINF_LINE_STATUS];
 760         switch (instance->line_status) {
 761         case 0:
 762                 atm_dev->signal = ATM_PHY_SIG_LOST;
 763                 atm_info(usbatm, "ADSL line: down\n");
 764                 break;
 765
 766         case 1:
 767                 atm_dev->signal = ATM_PHY_SIG_LOST;
 768                 atm_info(usbatm, "ADSL line: attempting to activate\n");
 769                 break;
 770
 771         case 2:
 772                 atm_dev->signal = ATM_PHY_SIG_LOST;
 773                 atm_info(usbatm, "ADSL line: training\n");
 774                 break;
 775
 776         case 3:
 777                 atm_dev->signal = ATM_PHY_SIG_LOST;
 778                 atm_info(usbatm, "ADSL line: channel analysis\n");
 779                 break;
 780
 781         case 4:
 782                 atm_dev->signal = ATM_PHY_SIG_LOST;
 783                 atm_info(usbatm, "ADSL line: exchange\n");
 784                 break;
 785
 786         case 5:
 787                 atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;
 788                 atm_dev->signal = ATM_PHY_SIG_FOUND;
 789
 790                 atm_info(usbatm, "ADSL line: up (%d kb/s down | %d kb/s up)\n",
 791                      buf[CXINF_DOWNSTREAM_RATE], buf[CXINF_UPSTREAM_RATE]);
 792                 break;
 793
 794         case 6:
 795                 atm_dev->signal = ATM_PHY_SIG_LOST;
 796                 atm_info(usbatm, "ADSL line: waiting\n");
 797                 break;
 798
 799         case 7:
 800                 atm_dev->signal = ATM_PHY_SIG_LOST;
 801                 atm_info(usbatm, "ADSL line: initializing\n");
 802                 break;
 803
 804         default:
 805                 atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
 806                 atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);
 807                 break;
 808         }
 809 reschedule:
 810
 811         mutex_lock(&instance->poll_state_serialize);
 812         if (instance->poll_state == CXPOLL_STOPPING &&
 813                                 instance->adsl_status == 1 && /* stopped */
 814                                 instance->line_status == 0) /* down */
 815                 instance->poll_state = CXPOLL_STOPPED;
 816
 817         if (instance->poll_state == CXPOLL_STOPPED)
 818                 keep_polling = 0;
 819         mutex_unlock(&instance->poll_state_serialize);
 820
 821         if (keep_polling)
 822                 schedule_delayed_work(&instance->poll_work,
 823                                 round_jiffies_relative(POLL_INTERVAL*HZ));
 824 }
 825
 826 static int cxacru_fw(struct usb_device *usb_dev, enum cxacru_fw_request fw,
 827                      u8 code1, u8 code2, u32 addr, u8 *data, int size)
 828 {
 829         int ret;
 830         u8 *buf;
 831         int offd, offb;
 832         const int stride = CMD_PACKET_SIZE - 8;
 833
 834         buf = (u8 *) __get_free_page(GFP_KERNEL);
 835         if (!buf)
 836                 return -ENOMEM;
 837
 838         offb = offd = 0;
 839         do {
 840                 int l = min_t(int, stride, size - offd);
 841                 buf[offb++] = fw;
 842                 buf[offb++] = l;
 843                 buf[offb++] = code1;
 844                 buf[offb++] = code2;
 845                 *((u32 *) (buf + offb)) = cpu_to_le32(addr);
 846                 offb += 4;
 847                 addr += l;
 848                 if(l)
 849                         memcpy(buf + offb, data + offd, l);
 850                 if (l < stride)
 851                         memset(buf + offb + l, 0, stride - l);
 852                 offb += stride;
 853                 offd += stride;
 854                 if ((offb >= PAGE_SIZE) || (offd >= size)) {
 855                         ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD),
 856                                            buf, offb, NULL, CMD_TIMEOUT);
 857                         if (ret < 0) {
 858                                 dbg("sending fw %#x failed", fw);
 859                                 goto cleanup;
 860                         }
 861                         offb = 0;
 862                 }
 863         } while(offd < size);
 864         dbg("sent fw %#x", fw);
 865
 866         ret = 0;
 867
 868 cleanup:
 869         free_page((unsigned long) buf);
 870         return ret;
 871 }
 872
 873 static void cxacru_upload_firmware(struct cxacru_data *instance,
 874                                    const struct firmware *fw,
 875                                    const struct firmware *bp,
 876                                    const struct firmware *cf)
 877 {
 878         int ret;
 879         int off;
 880         struct usbatm_data *usbatm = instance->usbatm;
 881         struct usb_device *usb_dev = usbatm->usb_dev;
 882         u16 signature[] = { usb_dev->descriptor.idVendor, usb_dev->descriptor.idProduct };
 883         u32 val;
 884
 885         dbg("cxacru_upload_firmware");
 886
 887         /* FirmwarePllFClkValue */
 888         val = cpu_to_le32(instance->modem_type->pll_f_clk);
 889         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLFCLK_ADDR, (u8 *) &val, 4);
 890         if (ret) {
 891                 usb_err(usbatm, "FirmwarePllFClkValue failed: %d\n", ret);
 892                 return;
 893         }
 894
 895         /* FirmwarePllBClkValue */
 896         val = cpu_to_le32(instance->modem_type->pll_b_clk);
 897         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, PLLBCLK_ADDR, (u8 *) &val, 4);
 898         if (ret) {
 899                 usb_err(usbatm, "FirmwarePllBClkValue failed: %d\n", ret);
 900                 return;
 901         }
 902
 903         /* Enable SDRAM */
 904         val = cpu_to_le32(SDRAM_ENA);
 905         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SDRAMEN_ADDR, (u8 *) &val, 4);
 906         if (ret) {
 907                 usb_err(usbatm, "Enable SDRAM failed: %d\n", ret);
 908                 return;
 909         }
 910
 911         /* Firmware */
 912         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);
 913         if (ret) {
 914                 usb_err(usbatm, "Firmware upload failed: %d\n", ret);
 915                 return;
 916         }
 917
 918         /* Boot ROM patch */
 919         if (instance->modem_type->boot_rom_patch) {
 920                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);
 921                 if (ret) {
 922                         usb_err(usbatm, "Boot ROM patching failed: %d\n", ret);
 923                         return;
 924                 }
 925         }
 926
 927         /* Signature */
 928         ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, SIG_ADDR, (u8 *) signature, 4);
 929         if (ret) {
 930                 usb_err(usbatm, "Signature storing failed: %d\n", ret);
 931                 return;
 932         }
 933
 934         if (instance->modem_type->boot_rom_patch) {
 935                 val = cpu_to_le32(BR_ADDR);
 936                 ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_STACK_ADDR, (u8 *) &val, 4);
 937         }
 938         else {
 939                 ret = cxacru_fw(usb_dev, FW_GOTO_MEM, 0x0, 0x0, FW_ADDR, NULL, 0);
 940         }
 941         if (ret) {
 942                 usb_err(usbatm, "Passing control to firmware failed: %d\n", ret);
 943                 return;
 944         }
 945
 946         /* Delay to allow firmware to start up. */
 947         msleep_interruptible(1000);
 948
 949         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_CMD));
 950         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_CMD));
 951         usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, CXACRU_EP_DATA));
 952         usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, CXACRU_EP_DATA));
 953
 954         ret = cxacru_cm(instance, CM_REQUEST_CARD_GET_STATUS, NULL, 0, NULL, 0);
 955         if (ret < 0) {
 956                 usb_err(usbatm, "modem failed to initialize: %d\n", ret);
 957                 return;
 958         }
 959
 960         /* Load config data (le32), doing one packet at a time */
 961         if (cf)
 962                 for (off = 0; off < cf->size / 4; ) {
 963                         u32 buf[CMD_PACKET_SIZE / 4 - 1];
 964                         int i, len = min_t(int, cf->size / 4 - off, CMD_PACKET_SIZE / 4 / 2 - 1);
 965                         buf[0] = cpu_to_le32(len);
 966                         for (i = 0; i < len; i++, off++) {
 967                                 buf[i * 2 + 1] = cpu_to_le32(off);
 968                                 memcpy(buf + i * 2 + 2, cf->data + off * 4, 4);
 969                         }
 970                         ret = cxacru_cm(instance, CM_REQUEST_CARD_DATA_SET,
 971                                         (u8 *) buf, len, NULL, 0);
 972                         if (ret < 0) {
 973                                 usb_err(usbatm, "load config data failed: %d\n", ret);
 974                                 return;
 975                         }
 976                 }
 977
 978         msleep_interruptible(4000);
 979 }
 980
 981 static int cxacru_find_firmware(struct cxacru_data *instance,
 982                                 char* phase, const struct firmware **fw_p)
 983 {
 984         struct usbatm_data *usbatm = instance->usbatm;
 985         struct device *dev = &usbatm->usb_intf->dev;
 986         char buf[16];
 987
 988         sprintf(buf, "cxacru-%s.bin", phase);
 989         dbg("cxacru_find_firmware: looking for %s", buf);
 990
 991         if (request_firmware(fw_p, buf, dev)) {
 992                 usb_dbg(usbatm, "no stage %s firmware found\n", phase);
 993                 return -ENOENT;
 994         }
 995
 996         usb_info(usbatm, "found firmware %s\n", buf);
 997
 998         return 0;
 999 }
1000
1001 static int cxacru_heavy_init(struct usbatm_data *usbatm_instance,
1002                              struct usb_interface *usb_intf)
1003 {
1004         const struct firmware *fw, *bp, *cf;
1005         struct cxacru_data *instance = usbatm_instance->driver_data;
1006
1007         int ret = cxacru_find_firmware(instance, "fw", &fw);
1008         if (ret) {
1009                 usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");
1010                 return ret;
1011         }
1012
1013         if (instance->modem_type->boot_rom_patch) {
1014                 ret = cxacru_find_firmware(instance, "bp", &bp);
1015                 if (ret) {
1016                         usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");
1017                         release_firmware(fw);
1018                         return ret;
1019                 }
1020         }
1021
1022         if (cxacru_find_firmware(instance, "cf", &cf))          /* optional */
1023                 cf = NULL;
1024
1025         cxacru_upload_firmware(instance, fw, bp, cf);
1026
1027         if (cf)
1028                 release_firmware(cf);
1029         if (instance->modem_type->boot_rom_patch)
1030                 release_firmware(bp);
1031         release_firmware(fw);
1032
1033         ret = cxacru_card_status(instance);
1034         if (ret)
1035                 dbg("modem initialisation failed");
1036         else
1037                 dbg("done setting up the modem");
1038
1039         return ret;
1040 }
1041
1042 static int cxacru_bind(struct usbatm_data *usbatm_instance,
1043                        struct usb_interface *intf, const struct usb_device_id *id)
1044 {
1045         struct cxacru_data *instance;
1046         struct usb_device *usb_dev = interface_to_usbdev(intf);
1047         int ret;
1048
1049         /* instance init */
1050         instance = kzalloc(sizeof(*instance), GFP_KERNEL);
1051         if (!instance) {
1052                 dbg("cxacru_bind: no memory for instance data");
1053                 return -ENOMEM;
1054         }
1055
1056         instance->usbatm = usbatm_instance;
1057         instance->modem_type = (struct cxacru_modem_type *) id->driver_info;
1058         memset(instance->card_info, 0, sizeof(instance->card_info));
1059
1060         mutex_init(&instance->poll_state_serialize);
1061         instance->poll_state = CXPOLL_STOPPED;
1062         instance->line_status = -1;
1063         instance->adsl_status = -1;
1064
1065         mutex_init(&instance->adsl_state_serialize);
1066
1067         instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);
1068         if (!instance->rcv_buf) {
1069                 dbg("cxacru_bind: no memory for rcv_buf");
1070                 ret = -ENOMEM;
1071                 goto fail;
1072         }
1073         instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);
1074         if (!instance->snd_buf) {
1075                 dbg("cxacru_bind: no memory for snd_buf");
1076                 ret = -ENOMEM;
1077                 goto fail;
1078         }
1079         instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);
1080         if (!instance->rcv_urb) {
1081                 dbg("cxacru_bind: no memory for rcv_urb");
1082                 ret = -ENOMEM;
1083                 goto fail;
1084         }
1085         instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);
1086         if (!instance->snd_urb) {
1087                 dbg("cxacru_bind: no memory for snd_urb");
1088                 ret = -ENOMEM;
1089                 goto fail;
1090         }
1091
1092         usb_fill_int_urb(instance->rcv_urb,
1093                         usb_dev, usb_rcvintpipe(usb_dev, CXACRU_EP_CMD),
1094                         instance->rcv_buf, PAGE_SIZE,
1095                         cxacru_blocking_completion, &instance->rcv_done, 1);
1096
1097         usb_fill_int_urb(instance->snd_urb,
1098                         usb_dev, usb_sndintpipe(usb_dev, CXACRU_EP_CMD),
1099                         instance->snd_buf, PAGE_SIZE,
1100                         cxacru_blocking_completion, &instance->snd_done, 4);
1101
1102         mutex_init(&instance->cm_serialize);
1103
1104         INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);
1105
1106         usbatm_instance->driver_data = instance;
1107
1108         usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);
1109
1110         return 0;
1111
1112  fail:
1113         free_page((unsigned long) instance->snd_buf);
1114         free_page((unsigned long) instance->rcv_buf);
1115         usb_free_urb(instance->snd_urb);
1116         usb_free_urb(instance->rcv_urb);
1117         kfree(instance);
1118
1119         return ret;
1120 }
1121
1122 static void cxacru_unbind(struct usbatm_data *usbatm_instance,
1123                 struct usb_interface *intf)
1124 {
1125         struct cxacru_data *instance = usbatm_instance->driver_data;
1126         int is_polling = 1;
1127
1128         dbg("cxacru_unbind entered");
1129
1130         if (!instance) {
1131                 dbg("cxacru_unbind: NULL instance!");
1132                 return;
1133         }
1134
1135         mutex_lock(&instance->poll_state_serialize);
1136         BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);
1137
1138         /* ensure that status polling continues unless
1139          * it has already stopped */
1140         if (instance->poll_state == CXPOLL_STOPPED)
1141                 is_polling = 0;
1142
1143         /* stop polling from being stopped or started */
1144         instance->poll_state = CXPOLL_SHUTDOWN;
1145         mutex_unlock(&instance->poll_state_serialize);
1146
1147         if (is_polling)
1148                 cancel_rearming_delayed_work(&instance->poll_work);
1149
1150         usb_kill_urb(instance->snd_urb);
1151         usb_kill_urb(instance->rcv_urb);
1152         usb_free_urb(instance->snd_urb);
1153         usb_free_urb(instance->rcv_urb);
1154
1155         free_page((unsigned long) instance->snd_buf);
1156         free_page((unsigned long) instance->rcv_buf);
1157
1158         kfree(instance);
1159
1160         usbatm_instance->driver_data = NULL;
1161 }
1162
1163 static const struct cxacru_modem_type cxacru_cafe = {
1164         .pll_f_clk = 0x02d874df,
1165         .pll_b_clk = 0x0196a51a,
1166         .boot_rom_patch = 1,
1167 };
1168
1169 static const struct cxacru_modem_type cxacru_cb00 = {
1170         .pll_f_clk = 0x5,
1171         .pll_b_clk = 0x3,
1172         .boot_rom_patch = 0,
1173 };
1174
1175 static const struct usb_device_id cxacru_usb_ids[] = {
1176         { /* V = Conexant                       P = ADSL modem (Euphrates project)      */
1177                 USB_DEVICE(0x0572, 0xcafe),     .driver_info = (unsigned long) &cxacru_cafe
1178         },
1179         { /* V = Conexant                       P = ADSL modem (Hasbani project)        */
1180                 USB_DEVICE(0x0572, 0xcb00),     .driver_info = (unsigned long) &cxacru_cb00
1181         },
1182         { /* V = Conexant                       P = ADSL modem                          */
1183                 USB_DEVICE(0x0572, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1184         },
1185         { /* V = Conexant                       P = ADSL modem (Well PTI-800) */
1186                 USB_DEVICE(0x0572, 0xcb02),     .driver_info = (unsigned long) &cxacru_cb00
1187         },
1188         { /* V = Conexant                       P = ADSL modem                          */
1189                 USB_DEVICE(0x0572, 0xcb06),     .driver_info = (unsigned long) &cxacru_cb00
1190         },
1191         { /* V = Conexant                       P = ADSL modem (ZTE ZXDSL 852)          */
1192                 USB_DEVICE(0x0572, 0xcb07),     .driver_info = (unsigned long) &cxacru_cb00
1193         },
1194         { /* V = Olitec                         P = ADSL modem version 2                */
1195                 USB_DEVICE(0x08e3, 0x0100),     .driver_info = (unsigned long) &cxacru_cafe
1196         },
1197         { /* V = Olitec                         P = ADSL modem version 3                */
1198                 USB_DEVICE(0x08e3, 0x0102),     .driver_info = (unsigned long) &cxacru_cb00
1199         },
1200         { /* V = Trust/Amigo Technology Co.     P = AMX-CA86U                           */
1201                 USB_DEVICE(0x0eb0, 0x3457),     .driver_info = (unsigned long) &cxacru_cafe
1202         },
1203         { /* V = Zoom                           P = 5510                                */
1204                 USB_DEVICE(0x1803, 0x5510),     .driver_info = (unsigned long) &cxacru_cb00
1205         },
1206         { /* V = Draytek                        P = Vigor 318                           */
1207                 USB_DEVICE(0x0675, 0x0200),     .driver_info = (unsigned long) &cxacru_cb00
1208         },
1209         { /* V = Zyxel                          P = 630-C1 aka OMNI ADSL USB (Annex A)  */
1210                 USB_DEVICE(0x0586, 0x330a),     .driver_info = (unsigned long) &cxacru_cb00
1211         },
1212         { /* V = Zyxel                          P = 630-C3 aka OMNI ADSL USB (Annex B)  */
1213                 USB_DEVICE(0x0586, 0x330b),     .driver_info = (unsigned long) &cxacru_cb00
1214         },
1215         { /* V = Aethra                         P = Starmodem UM1020                    */
1216                 USB_DEVICE(0x0659, 0x0020),     .driver_info = (unsigned long) &cxacru_cb00
1217         },
1218         { /* V = Aztech Systems                 P = ? AKA Pirelli AUA-010               */
1219                 USB_DEVICE(0x0509, 0x0812),     .driver_info = (unsigned long) &cxacru_cb00
1220         },
1221         { /* V = Netopia                        P = Cayman 3341(Annex A)/3351(Annex B)  */
1222                 USB_DEVICE(0x100d, 0xcb01),     .driver_info = (unsigned long) &cxacru_cb00
1223         },
1224         { /* V = Netopia                        P = Cayman 3342(Annex A)/3352(Annex B)  */
1225                 USB_DEVICE(0x100d, 0x3342),     .driver_info = (unsigned long) &cxacru_cb00
1226         },
1227         {}
1228 };
1229
1230 MODULE_DEVICE_TABLE(usb, cxacru_usb_ids);
1231
1232 static struct usbatm_driver cxacru_driver = {
1233         .driver_name    = cxacru_driver_name,
1234         .bind           = cxacru_bind,
1235         .heavy_init     = cxacru_heavy_init,
1236         .unbind         = cxacru_unbind,
1237         .atm_start      = cxacru_atm_start,
1238         .atm_stop       = cxacru_remove_device_files,
1239         .bulk_in        = CXACRU_EP_DATA,
1240         .bulk_out       = CXACRU_EP_DATA,
1241         .rx_padding     = 3,
1242         .tx_padding     = 11,
1243 };
1244
1245 static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1246 {
1247         return usbatm_usb_probe(intf, id, &cxacru_driver);
1248 }
1249
1250 static struct usb_driver cxacru_usb_driver = {
1251         .name           = cxacru_driver_name,
1252         .probe          = cxacru_usb_probe,
1253         .disconnect     = usbatm_usb_disconnect,
1254         .id_table       = cxacru_usb_ids
1255 };
1256
1257 static int __init cxacru_init(void)
1258 {
1259         return usb_register(&cxacru_usb_driver);
1260 }
1261
1262 static void __exit cxacru_cleanup(void)
1263 {
1264         usb_deregister(&cxacru_usb_driver);
1265 }
1266
1267 module_init(cxacru_init);
1268 module_exit(cxacru_cleanup);
1269
1270 MODULE_AUTHOR(DRIVER_AUTHOR);
1271 MODULE_DESCRIPTION(DRIVER_DESC);
1272 MODULE_LICENSE("GPL");
1273 MODULE_VERSION(DRIVER_VERSION);