drivers/pci/hotplug/cpqphp_core.c

   1 /*
   2  * Compaq Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
   6  * Copyright (C) 2001 IBM Corp.
   7  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <greg@kroah.com>
  26  *
  27  * Jan 12, 2003 -       Added 66/100/133MHz PCI-X support,
  28  *                      Torben Mathiasen <torben.mathiasen@hp.com>
  29  *
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/slab.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/pci.h>
  40 #include <linux/pci_hotplug.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43
  44 #include <asm/uaccess.h>
  45
  46 #include "cpqphp.h"
  47 #include "cpqphp_nvram.h"
  48 #include "../../../arch/x86/pci/pci.h"  /* horrible hack showing how processor dependent we are... */
  49
  50
  51 /* Global variables */
  52 int cpqhp_debug;
  53 int cpqhp_legacy_mode;
  54 struct controller *cpqhp_ctrl_list;     /* = NULL */
  55 struct pci_func *cpqhp_slot_list[256];
  56
  57 /* local variables */
  58 static void __iomem *smbios_table;
  59 static void __iomem *smbios_start;
  60 static void __iomem *cpqhp_rom_start;
  61 static int power_mode;
  62 static int debug;
  63 static int initialized;
  64
  65 #define DRIVER_VERSION  "0.9.8"
  66 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
  67 #define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
  68
  69 MODULE_AUTHOR(DRIVER_AUTHOR);
  70 MODULE_DESCRIPTION(DRIVER_DESC);
  71 MODULE_LICENSE("GPL");
  72
  73 module_param(power_mode, bool, 0644);
  74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
  75
  76 module_param(debug, bool, 0644);
  77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  78
  79 #define CPQHPC_MODULE_MINOR 208
  80
  81 static int one_time_init        (void);
  82 static int set_attention_status (struct hotplug_slot *slot, u8 value);
  83 static int process_SI           (struct hotplug_slot *slot);
  84 static int process_SS           (struct hotplug_slot *slot);
  85 static int hardware_test        (struct hotplug_slot *slot, u32 value);
  86 static int get_power_status     (struct hotplug_slot *slot, u8 *value);
  87 static int get_attention_status (struct hotplug_slot *slot, u8 *value);
  88 static int get_latch_status     (struct hotplug_slot *slot, u8 *value);
  89 static int get_adapter_status   (struct hotplug_slot *slot, u8 *value);
  90 static int get_max_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  91 static int get_cur_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  92
  93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
  94         .owner =                THIS_MODULE,
  95         .set_attention_status = set_attention_status,
  96         .enable_slot =          process_SI,
  97         .disable_slot =         process_SS,
  98         .hardware_test =        hardware_test,
  99         .get_power_status =     get_power_status,
 100         .get_attention_status = get_attention_status,
 101         .get_latch_status =     get_latch_status,
 102         .get_adapter_status =   get_adapter_status,
 103         .get_max_bus_speed =    get_max_bus_speed,
 104         .get_cur_bus_speed =    get_cur_bus_speed,
 105 };
 106
 107
 108 static inline int is_slot64bit(struct slot *slot)
 109 {
 110         return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
 111 }
 112
 113 static inline int is_slot66mhz(struct slot *slot)
 114 {
 115         return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
 116 }
 117
 118 /**
 119  * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
 120  * @begin: begin pointer for region to be scanned.
 121  * @end: end pointer for region to be scanned.
 122  *
 123  * Returns pointer to the head of the SMBIOS tables (or %NULL).
 124  */
 125 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
 126 {
 127         void __iomem *fp;
 128         void __iomem *endp;
 129         u8 temp1, temp2, temp3, temp4;
 130         int status = 0;
 131
 132         endp = (end - sizeof(u32) + 1);
 133
 134         for (fp = begin; fp <= endp; fp += 16) {
 135                 temp1 = readb(fp);
 136                 temp2 = readb(fp+1);
 137                 temp3 = readb(fp+2);
 138                 temp4 = readb(fp+3);
 139                 if (temp1 == '_' &&
 140                     temp2 == 'S' &&
 141                     temp3 == 'M' &&
 142                     temp4 == '_') {
 143                         status = 1;
 144                         break;
 145                 }
 146         }
 147
 148         if (!status)
 149                 fp = NULL;
 150
 151         dbg("Discovered SMBIOS Entry point at %p\n", fp);
 152
 153         return fp;
 154 }
 155
 156 /**
 157  * init_SERR - Initializes the per slot SERR generation.
 158  * @ctrl: controller to use
 159  *
 160  * For unexpected switch opens
 161  */
 162 static int init_SERR(struct controller * ctrl)
 163 {
 164         u32 tempdword;
 165         u32 number_of_slots;
 166         u8 physical_slot;
 167
 168         if (!ctrl)
 169                 return 1;
 170
 171         tempdword = ctrl->first_slot;
 172
 173         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 174         // Loop through slots
 175         while (number_of_slots) {
 176                 physical_slot = tempdword;
 177                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
 178                 tempdword++;
 179                 number_of_slots--;
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 /* nice debugging output */
 187 static int pci_print_IRQ_route (void)
 188 {
 189         struct irq_routing_table *routing_table;
 190         int len;
 191         int loop;
 192
 193         u8 tbus, tdevice, tslot;
 194
 195         routing_table = pcibios_get_irq_routing_table();
 196         if (routing_table == NULL) {
 197                 err("No BIOS Routing Table??? Not good\n");
 198                 return -ENOMEM;
 199         }
 200
 201         len = (routing_table->size - sizeof(struct irq_routing_table)) /
 202                         sizeof(struct irq_info);
 203         // Make sure I got at least one entry
 204         if (len == 0) {
 205                 kfree(routing_table);
 206                 return -1;
 207         }
 208
 209         dbg("bus dev func slot\n");
 210
 211         for (loop = 0; loop < len; ++loop) {
 212                 tbus = routing_table->slots[loop].bus;
 213                 tdevice = routing_table->slots[loop].devfn;
 214                 tslot = routing_table->slots[loop].slot;
 215                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 216
 217         }
 218         kfree(routing_table);
 219         return 0;
 220 }
 221
 222
 223 /**
 224  * get_subsequent_smbios_entry: get the next entry from bios table.
 225  * @smbios_start: where to start in the SMBIOS table
 226  * @smbios_table: location of the SMBIOS table
 227  * @curr: %NULL or pointer to previously returned structure
 228  *
 229  * Gets the first entry if previous == NULL;
 230  * otherwise, returns the next entry.
 231  * Uses global SMBIOS Table pointer.
 232  *
 233  * Returns a pointer to an SMBIOS structure or NULL if none found.
 234  */
 235 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 236                                                 void __iomem *smbios_table,
 237                                                 void __iomem *curr)
 238 {
 239         u8 bail = 0;
 240         u8 previous_byte = 1;
 241         void __iomem *p_temp;
 242         void __iomem *p_max;
 243
 244         if (!smbios_table || !curr)
 245                 return(NULL);
 246
 247         // set p_max to the end of the table
 248         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 249
 250         p_temp = curr;
 251         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 252
 253         while ((p_temp < p_max) && !bail) {
 254                 /* Look for the double NULL terminator
 255                  * The first condition is the previous byte
 256                  * and the second is the curr */
 257                 if (!previous_byte && !(readb(p_temp))) {
 258                         bail = 1;
 259                 }
 260
 261                 previous_byte = readb(p_temp);
 262                 p_temp++;
 263         }
 264
 265         if (p_temp < p_max) {
 266                 return p_temp;
 267         } else {
 268                 return NULL;
 269         }
 270 }
 271
 272
 273 /**
 274  * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
 275  * @smbios_start: where to start in the SMBIOS table
 276  * @smbios_table: location of the SMBIOS table
 277  * @type: SMBIOS structure type to be returned
 278  * @previous: %NULL or pointer to previously returned structure
 279  *
 280  * Gets the first entry of the specified type if previous == %NULL;
 281  * Otherwise, returns the next entry of the given type.
 282  * Uses global SMBIOS Table pointer.
 283  * Uses get_subsequent_smbios_entry.
 284  *
 285  * Returns a pointer to an SMBIOS structure or %NULL if none found.
 286  */
 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
 288                                         void __iomem *smbios_table,
 289                                         u8 type,
 290                                         void __iomem *previous)
 291 {
 292         if (!smbios_table)
 293                 return NULL;
 294
 295         if (!previous) {
 296                 previous = smbios_start;
 297         } else {
 298                 previous = get_subsequent_smbios_entry(smbios_start,
 299                                         smbios_table, previous);
 300         }
 301
 302         while (previous) {
 303                 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) {
 304                         previous = get_subsequent_smbios_entry(smbios_start,
 305                                                 smbios_table, previous);
 306                 } else {
 307                         break;
 308                 }
 309         }
 310
 311         return previous;
 312 }
 313
 314 static void release_slot(struct hotplug_slot *hotplug_slot)
 315 {
 316         struct slot *slot = hotplug_slot->private;
 317
 318         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 319
 320         kfree(slot->hotplug_slot->info);
 321         kfree(slot->hotplug_slot);
 322         kfree(slot);
 323 }
 324
 325 #define SLOT_NAME_SIZE 10
 326
 327 static int ctrl_slot_setup(struct controller *ctrl,
 328                         void __iomem *smbios_start,
 329                         void __iomem *smbios_table)
 330 {
 331         struct slot *slot;
 332         struct hotplug_slot *hotplug_slot;
 333         struct hotplug_slot_info *hotplug_slot_info;
 334         u8 number_of_slots;
 335         u8 slot_device;
 336         u8 slot_number;
 337         u8 ctrl_slot;
 338         u32 tempdword;
 339         char name[SLOT_NAME_SIZE];
 340         void __iomem *slot_entry= NULL;
 341         int result = -ENOMEM;
 342
 343         dbg("%s\n", __func__);
 344
 345         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 346
 347         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 348         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
 349         slot_number = ctrl->first_slot;
 350
 351         while (number_of_slots) {
 352                 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 353                 if (!slot)
 354                         goto error;
 355
 356                 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
 357                                                 GFP_KERNEL);
 358                 if (!slot->hotplug_slot)
 359                         goto error_slot;
 360                 hotplug_slot = slot->hotplug_slot;
 361
 362                 hotplug_slot->info =
 363                                 kzalloc(sizeof(*(hotplug_slot->info)),
 364                                                         GFP_KERNEL);
 365                 if (!hotplug_slot->info)
 366                         goto error_hpslot;
 367                 hotplug_slot_info = hotplug_slot->info;
 368
 369                 slot->ctrl = ctrl;
 370                 slot->bus = ctrl->bus;
 371                 slot->device = slot_device;
 372                 slot->number = slot_number;
 373                 dbg("slot->number = %u\n", slot->number);
 374
 375                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
 376                                         slot_entry);
 377
 378                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
 379                                 slot->number)) {
 380                         slot_entry = get_SMBIOS_entry(smbios_start,
 381                                                 smbios_table, 9, slot_entry);
 382                 }
 383
 384                 slot->p_sm_slot = slot_entry;
 385
 386                 init_timer(&slot->task_event);
 387                 slot->task_event.expires = jiffies + 5 * HZ;
 388                 slot->task_event.function = cpqhp_pushbutton_thread;
 389
 390                 //FIXME: these capabilities aren't used but if they are
 391                 //       they need to be correctly implemented
 392                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
 393                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
 394
 395                 if (is_slot64bit(slot))
 396                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
 397                 if (is_slot66mhz(slot))
 398                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
 399                 if (ctrl->speed == PCI_SPEED_66MHz)
 400                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
 401
 402                 ctrl_slot =
 403                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
 404
 405                 // Check presence
 406                 slot->capabilities |=
 407                         ((((~tempdword) >> 23) |
 408                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
 409                 // Check the switch state
 410                 slot->capabilities |=
 411                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
 412                 // Check the slot enable
 413                 slot->capabilities |=
 414                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
 415
 416                 /* register this slot with the hotplug pci core */
 417                 hotplug_slot->release = &release_slot;
 418                 hotplug_slot->private = slot;
 419                 snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
 420                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
 421
 422                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
 423                 hotplug_slot_info->attention_status =
 424                         cpq_get_attention_status(ctrl, slot);
 425                 hotplug_slot_info->latch_status =
 426                         cpq_get_latch_status(ctrl, slot);
 427                 hotplug_slot_info->adapter_status =
 428                         get_presence_status(ctrl, slot);
 429
 430                 dbg("registering bus %d, dev %d, number %d, "
 431                                 "ctrl->slot_device_offset %d, slot %d\n",
 432                                 slot->bus, slot->device,
 433                                 slot->number, ctrl->slot_device_offset,
 434                                 slot_number);
 435                 result = pci_hp_register(hotplug_slot,
 436                                          ctrl->pci_dev->bus,
 437                                          slot->device,
 438                                          name);
 439                 if (result) {
 440                         err("pci_hp_register failed with error %d\n", result);
 441                         goto error_info;
 442                 }
 443
 444                 slot->next = ctrl->slot;
 445                 ctrl->slot = slot;
 446
 447                 number_of_slots--;
 448                 slot_device++;
 449                 slot_number++;
 450         }
 451
 452         return 0;
 453 error_info:
 454         kfree(hotplug_slot_info);
 455 error_hpslot:
 456         kfree(hotplug_slot);
 457 error_slot:
 458         kfree(slot);
 459 error:
 460         return result;
 461 }
 462
 463 static int ctrl_slot_cleanup (struct controller * ctrl)
 464 {
 465         struct slot *old_slot, *next_slot;
 466
 467         old_slot = ctrl->slot;
 468         ctrl->slot = NULL;
 469
 470         while (old_slot) {
 471                 /* memory will be freed by the release_slot callback */
 472                 next_slot = old_slot->next;
 473                 pci_hp_deregister (old_slot->hotplug_slot);
 474                 old_slot = next_slot;
 475         }
 476
 477         cpqhp_remove_debugfs_files(ctrl);
 478
 479         //Free IRQ associated with hot plug device
 480         free_irq(ctrl->interrupt, ctrl);
 481         //Unmap the memory
 482         iounmap(ctrl->hpc_reg);
 483         //Finally reclaim PCI mem
 484         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 485                            pci_resource_len(ctrl->pci_dev, 0));
 486
 487         return(0);
 488 }
 489
 490
 491 //============================================================================
 492 // function:    get_slot_mapping
 493 //
 494 // Description: Attempts to determine a logical slot mapping for a PCI
 495 //              device.  Won't work for more than one PCI-PCI bridge
 496 //              in a slot.
 497 //
 498 // Input:       u8 bus_num - bus number of PCI device
 499 //              u8 dev_num - device number of PCI device
 500 //              u8 *slot - Pointer to u8 where slot number will
 501 //                      be returned
 502 //
 503 // Output:      SUCCESS or FAILURE
 504 //=============================================================================
 505 static int
 506 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 507 {
 508         struct irq_routing_table *PCIIRQRoutingInfoLength;
 509         u32 work;
 510         long len;
 511         long loop;
 512
 513         u8 tbus, tdevice, tslot, bridgeSlot;
 514
 515         dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
 516
 517         bridgeSlot = 0xFF;
 518
 519         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 520         if (!PCIIRQRoutingInfoLength)
 521                 return -1;
 522
 523         len = (PCIIRQRoutingInfoLength->size -
 524                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 525         // Make sure I got at least one entry
 526         if (len == 0) {
 527                 kfree(PCIIRQRoutingInfoLength);
 528                 return -1;
 529         }
 530
 531         for (loop = 0; loop < len; ++loop) {
 532                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 533                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
 534                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 535
 536                 if ((tbus == bus_num) && (tdevice == dev_num)) {
 537                         *slot = tslot;
 538                         kfree(PCIIRQRoutingInfoLength);
 539                         return 0;
 540                 } else {
 541                         /* Did not get a match on the target PCI device. Check
 542                          * if the current IRQ table entry is a PCI-to-PCI bridge
 543                          * device.  If so, and it's secondary bus matches the
 544                          * bus number for the target device, I need to save the
 545                          * bridge's slot number.  If I can not find an entry for
 546                          * the target device, I will have to assume it's on the
 547                          * other side of the bridge, and assign it the bridge's
 548                          * slot. */
 549                         bus->number = tbus;
 550                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 551                                                 PCI_CLASS_REVISION, &work);
 552
 553                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 554                                 pci_bus_read_config_dword(bus,
 555                                                         PCI_DEVFN(tdevice, 0),
 556                                                         PCI_PRIMARY_BUS, &work);
 557                                 // See if bridge's secondary bus matches target bus.
 558                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
 559                                         bridgeSlot = tslot;
 560                                 }
 561                         }
 562                 }
 563
 564         }
 565
 566         // If we got here, we didn't find an entry in the IRQ mapping table
 567         // for the target PCI device.  If we did determine that the target
 568         // device is on the other side of a PCI-to-PCI bridge, return the
 569         // slot number for the bridge.
 570         if (bridgeSlot != 0xFF) {
 571                 *slot = bridgeSlot;
 572                 kfree(PCIIRQRoutingInfoLength);
 573                 return 0;
 574         }
 575         kfree(PCIIRQRoutingInfoLength);
 576         // Couldn't find an entry in the routing table for this PCI device
 577         return -1;
 578 }
 579
 580
 581 /**
 582  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 583  * @ctrl: struct controller to use
 584  * @func: PCI device/function info
 585  * @status: LED control flag: 1 = LED on, 0 = LED off
 586  */
 587 static int
 588 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 589                                 u32 status)
 590 {
 591         u8 hp_slot;
 592
 593         if (func == NULL)
 594                 return(1);
 595
 596         hp_slot = func->device - ctrl->slot_device_offset;
 597
 598         // Wait for exclusive access to hardware
 599         mutex_lock(&ctrl->crit_sect);
 600
 601         if (status == 1) {
 602                 amber_LED_on (ctrl, hp_slot);
 603         } else if (status == 0) {
 604                 amber_LED_off (ctrl, hp_slot);
 605         } else {
 606                 // Done with exclusive hardware access
 607                 mutex_unlock(&ctrl->crit_sect);
 608                 return(1);
 609         }
 610
 611         set_SOGO(ctrl);
 612
 613         // Wait for SOBS to be unset
 614         wait_for_ctrl_irq (ctrl);
 615
 616         // Done with exclusive hardware access
 617         mutex_unlock(&ctrl->crit_sect);
 618
 619         return(0);
 620 }
 621
 622
 623 /**
 624  * set_attention_status - Turns the Amber LED for a slot on or off
 625  * @hotplug_slot: slot to change LED on
 626  * @status: LED control flag
 627  */
 628 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 629 {
 630         struct pci_func *slot_func;
 631         struct slot *slot = hotplug_slot->private;
 632         struct controller *ctrl = slot->ctrl;
 633         u8 bus;
 634         u8 devfn;
 635         u8 device;
 636         u8 function;
 637
 638         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 639
 640         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 641                 return -ENODEV;
 642
 643         device = devfn >> 3;
 644         function = devfn & 0x7;
 645         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 646
 647         slot_func = cpqhp_slot_find(bus, device, function);
 648         if (!slot_func)
 649                 return -ENODEV;
 650
 651         return cpqhp_set_attention_status(ctrl, slot_func, status);
 652 }
 653
 654
 655 static int process_SI(struct hotplug_slot *hotplug_slot)
 656 {
 657         struct pci_func *slot_func;
 658         struct slot *slot = hotplug_slot->private;
 659         struct controller *ctrl = slot->ctrl;
 660         u8 bus;
 661         u8 devfn;
 662         u8 device;
 663         u8 function;
 664
 665         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 666
 667         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 668                 return -ENODEV;
 669
 670         device = devfn >> 3;
 671         function = devfn & 0x7;
 672         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 673
 674         slot_func = cpqhp_slot_find(bus, device, function);
 675         if (!slot_func)
 676                 return -ENODEV;
 677
 678         slot_func->bus = bus;
 679         slot_func->device = device;
 680         slot_func->function = function;
 681         slot_func->configured = 0;
 682         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 683         return cpqhp_process_SI(ctrl, slot_func);
 684 }
 685
 686
 687 static int process_SS(struct hotplug_slot *hotplug_slot)
 688 {
 689         struct pci_func *slot_func;
 690         struct slot *slot = hotplug_slot->private;
 691         struct controller *ctrl = slot->ctrl;
 692         u8 bus;
 693         u8 devfn;
 694         u8 device;
 695         u8 function;
 696
 697         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 698
 699         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 700                 return -ENODEV;
 701
 702         device = devfn >> 3;
 703         function = devfn & 0x7;
 704         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 705
 706         slot_func = cpqhp_slot_find(bus, device, function);
 707         if (!slot_func)
 708                 return -ENODEV;
 709
 710         dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
 711         return cpqhp_process_SS(ctrl, slot_func);
 712 }
 713
 714
 715 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 716 {
 717         struct slot *slot = hotplug_slot->private;
 718         struct controller *ctrl = slot->ctrl;
 719
 720         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 721
 722         return cpqhp_hardware_test(ctrl, value);
 723 }
 724
 725
 726 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 727 {
 728         struct slot *slot = hotplug_slot->private;
 729         struct controller *ctrl = slot->ctrl;
 730
 731         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 732
 733         *value = get_slot_enabled(ctrl, slot);
 734         return 0;
 735 }
 736
 737 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 738 {
 739         struct slot *slot = hotplug_slot->private;
 740         struct controller *ctrl = slot->ctrl;
 741
 742         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 743
 744         *value = cpq_get_attention_status(ctrl, slot);
 745         return 0;
 746 }
 747
 748 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 749 {
 750         struct slot *slot = hotplug_slot->private;
 751         struct controller *ctrl = slot->ctrl;
 752
 753         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 754
 755         *value = cpq_get_latch_status(ctrl, slot);
 756
 757         return 0;
 758 }
 759
 760 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 761 {
 762         struct slot *slot = hotplug_slot->private;
 763         struct controller *ctrl = slot->ctrl;
 764
 765         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 766
 767         *value = get_presence_status(ctrl, slot);
 768
 769         return 0;
 770 }
 771
 772 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 773 {
 774         struct slot *slot = hotplug_slot->private;
 775         struct controller *ctrl = slot->ctrl;
 776
 777         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 778
 779         *value = ctrl->speed_capability;
 780
 781         return 0;
 782 }
 783
 784 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 785 {
 786         struct slot *slot = hotplug_slot->private;
 787         struct controller *ctrl = slot->ctrl;
 788
 789         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 790
 791         *value = ctrl->speed;
 792
 793         return 0;
 794 }
 795
 796 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 797 {
 798         u8 num_of_slots = 0;
 799         u8 hp_slot = 0;
 800         u8 device;
 801         u8 bus_cap;
 802         u16 temp_word;
 803         u16 vendor_id;
 804         u16 subsystem_vid;
 805         u16 subsystem_deviceid;
 806         u32 rc;
 807         struct controller *ctrl;
 808         struct pci_func *func;
 809         int err;
 810
 811         err = pci_enable_device(pdev);
 812         if (err) {
 813                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 814                         pci_name(pdev), err);
 815                 return err;
 816         }
 817
 818         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
 819         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
 820         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
 821                 err(msg_HPC_non_compaq_or_intel);
 822                 rc = -ENODEV;
 823                 goto err_disable_device;
 824         }
 825         dbg("Vendor ID: %x\n", vendor_id);
 826
 827         dbg("revision: %d\n", pdev->revision);
 828         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 829                 err(msg_HPC_rev_error);
 830                 rc = -ENODEV;
 831                 goto err_disable_device;
 832         }
 833
 834         /* Check for the proper subsytem ID's
 835          * Intel uses a different SSID programming model than Compaq.
 836          * For Intel, each SSID bit identifies a PHP capability.
 837          * Also Intel HPC's may have RID=0.
 838          */
 839         if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 840                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
 841                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 842                 if (rc) {
 843                         err("%s : pci_read_config_word failed\n", __func__);
 844                         goto err_disable_device;
 845                 }
 846                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 847                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 848                         err(msg_HPC_non_compaq_or_intel);
 849                         rc = -ENODEV;
 850                         goto err_disable_device;
 851                 }
 852
 853                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 854                 if (!ctrl) {
 855                         err("%s : out of memory\n", __func__);
 856                         rc = -ENOMEM;
 857                         goto err_disable_device;
 858                 }
 859
 860                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 861                 if (rc) {
 862                         err("%s : pci_read_config_word failed\n", __func__);
 863                         goto err_free_ctrl;
 864                 }
 865
 866                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 867
 868                 /* Set Vendor ID, so it can be accessed later from other functions */
 869                 ctrl->vendor_id = vendor_id;
 870
 871                 switch (subsystem_vid) {
 872                         case PCI_VENDOR_ID_COMPAQ:
 873                                 if (pdev->revision >= 0x13) { /* CIOBX */
 874                                         ctrl->push_flag = 1;
 875                                         ctrl->slot_switch_type = 1;
 876                                         ctrl->push_button = 1;
 877                                         ctrl->pci_config_space = 1;
 878                                         ctrl->defeature_PHP = 1;
 879                                         ctrl->pcix_support = 1;
 880                                         ctrl->pcix_speed_capability = 1;
 881                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 882                                         if (bus_cap & 0x80) {
 883                                                 dbg("bus max supports 133MHz PCI-X\n");
 884                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 885                                                 break;
 886                                         }
 887                                         if (bus_cap & 0x40) {
 888                                                 dbg("bus max supports 100MHz PCI-X\n");
 889                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 890                                                 break;
 891                                         }
 892                                         if (bus_cap & 20) {
 893                                                 dbg("bus max supports 66MHz PCI-X\n");
 894                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 895                                                 break;
 896                                         }
 897                                         if (bus_cap & 10) {
 898                                                 dbg("bus max supports 66MHz PCI\n");
 899                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 900                                                 break;
 901                                         }
 902
 903                                         break;
 904                                 }
 905
 906                                 switch (subsystem_deviceid) {
 907                                         case PCI_SUB_HPC_ID:
 908                                                 /* Original 6500/7000 implementation */
 909                                                 ctrl->slot_switch_type = 1;
 910                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 911                                                 ctrl->push_button = 0;
 912                                                 ctrl->pci_config_space = 1;
 913                                                 ctrl->defeature_PHP = 1;
 914                                                 ctrl->pcix_support = 0;
 915                                                 ctrl->pcix_speed_capability = 0;
 916                                                 break;
 917                                         case PCI_SUB_HPC_ID2:
 918                                                 /* First Pushbutton implementation */
 919                                                 ctrl->push_flag = 1;
 920                                                 ctrl->slot_switch_type = 1;
 921                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 922                                                 ctrl->push_button = 1;
 923                                                 ctrl->pci_config_space = 1;
 924                                                 ctrl->defeature_PHP = 1;
 925                                                 ctrl->pcix_support = 0;
 926                                                 ctrl->pcix_speed_capability = 0;
 927                                                 break;
 928                                         case PCI_SUB_HPC_ID_INTC:
 929                                                 /* Third party (6500/7000) */
 930                                                 ctrl->slot_switch_type = 1;
 931                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 932                                                 ctrl->push_button = 0;
 933                                                 ctrl->pci_config_space = 1;
 934                                                 ctrl->defeature_PHP = 1;
 935                                                 ctrl->pcix_support = 0;
 936                                                 ctrl->pcix_speed_capability = 0;
 937                                                 break;
 938                                         case PCI_SUB_HPC_ID3:
 939                                                 /* First 66 Mhz implementation */
 940                                                 ctrl->push_flag = 1;
 941                                                 ctrl->slot_switch_type = 1;
 942                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 943                                                 ctrl->push_button = 1;
 944                                                 ctrl->pci_config_space = 1;
 945                                                 ctrl->defeature_PHP = 1;
 946                                                 ctrl->pcix_support = 0;
 947                                                 ctrl->pcix_speed_capability = 0;
 948                                                 break;
 949                                         case PCI_SUB_HPC_ID4:
 950                                                 /* First PCI-X implementation, 100MHz */
 951                                                 ctrl->push_flag = 1;
 952                                                 ctrl->slot_switch_type = 1;
 953                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 954                                                 ctrl->push_button = 1;
 955                                                 ctrl->pci_config_space = 1;
 956                                                 ctrl->defeature_PHP = 1;
 957                                                 ctrl->pcix_support = 1;
 958                                                 ctrl->pcix_speed_capability = 0;
 959                                                 break;
 960                                         default:
 961                                                 err(msg_HPC_not_supported);
 962                                                 rc = -ENODEV;
 963                                                 goto err_free_ctrl;
 964                                 }
 965                                 break;
 966
 967                         case PCI_VENDOR_ID_INTEL:
 968                                 /* Check for speed capability (0=33, 1=66) */
 969                                 if (subsystem_deviceid & 0x0001) {
 970                                         ctrl->speed_capability = PCI_SPEED_66MHz;
 971                                 } else {
 972                                         ctrl->speed_capability = PCI_SPEED_33MHz;
 973                                 }
 974
 975                                 /* Check for push button */
 976                                 if (subsystem_deviceid & 0x0002) {
 977                                         /* no push button */
 978                                         ctrl->push_button = 0;
 979                                 } else {
 980                                         /* push button supported */
 981                                         ctrl->push_button = 1;
 982                                 }
 983
 984                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
 985                                 if (subsystem_deviceid & 0x0004) {
 986                                         /* no switch */
 987                                         ctrl->slot_switch_type = 0;
 988                                 } else {
 989                                         /* switch */
 990                                         ctrl->slot_switch_type = 1;
 991                                 }
 992
 993                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
 994                                 if (subsystem_deviceid & 0x0008) {
 995                                         ctrl->defeature_PHP = 1;        // PHP supported
 996                                 } else {
 997                                         ctrl->defeature_PHP = 0;        // PHP not supported
 998                                 }
 999
1000                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1001                                 if (subsystem_deviceid & 0x0010) {
1002                                         ctrl->alternate_base_address = 1;       // supported
1003                                 } else {
1004                                         ctrl->alternate_base_address = 0;       // not supported
1005                                 }
1006
1007                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1008                                 if (subsystem_deviceid & 0x0020) {
1009                                         ctrl->pci_config_space = 1;             // supported
1010                                 } else {
1011                                         ctrl->pci_config_space = 0;             // not supported
1012                                 }
1013
1014                                 /* PCI-X support */
1015                                 if (subsystem_deviceid & 0x0080) {
1016                                         /* PCI-X capable */
1017                                         ctrl->pcix_support = 1;
1018                                         /* Frequency of operation in PCI-X mode */
1019                                         if (subsystem_deviceid & 0x0040) {
1020                                                 /* 133MHz PCI-X if bit 7 is 1 */
1021                                                 ctrl->pcix_speed_capability = 1;
1022                                         } else {
1023                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1024                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1025                                                 ctrl->pcix_speed_capability = 0;
1026                                         }
1027                                 } else {
1028                                         /* Conventional PCI */
1029                                         ctrl->pcix_support = 0;
1030                                         ctrl->pcix_speed_capability = 0;
1031                                 }
1032                                 break;
1033
1034                         default:
1035                                 err(msg_HPC_not_supported);
1036                                 rc = -ENODEV;
1037                                 goto err_free_ctrl;
1038                 }
1039
1040         } else {
1041                 err(msg_HPC_not_supported);
1042                 return -ENODEV;
1043         }
1044
1045         // Tell the user that we found one.
1046         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1047                                         pdev->bus->number);
1048
1049         dbg("Hotplug controller capabilities:\n");
1050         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1051         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1052                                         "switch present" : "no switch");
1053         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1054                                         "PHP supported" : "PHP not supported");
1055         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1056                                         "supported" : "not supported");
1057         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1058                                         "supported" : "not supported");
1059         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1060                                         "supported" : "not supported");
1061         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1062                                         "supported" : "not supported");
1063
1064         ctrl->pci_dev = pdev;
1065         pci_set_drvdata(pdev, ctrl);
1066
1067         /* make our own copy of the pci bus structure,
1068          * as we like tweaking it a lot */
1069         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1070         if (!ctrl->pci_bus) {
1071                 err("out of memory\n");
1072                 rc = -ENOMEM;
1073                 goto err_free_ctrl;
1074         }
1075         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1076
1077         ctrl->bus = pdev->bus->number;
1078         ctrl->rev = pdev->revision;
1079         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1080                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1081
1082         mutex_init(&ctrl->crit_sect);
1083         init_waitqueue_head(&ctrl->queue);
1084
1085         /* initialize our threads if they haven't already been started up */
1086         rc = one_time_init();
1087         if (rc) {
1088                 goto err_free_bus;
1089         }
1090
1091         dbg("pdev = %p\n", pdev);
1092         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1093         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1094
1095         if (!request_mem_region(pci_resource_start(pdev, 0),
1096                                 pci_resource_len(pdev, 0), MY_NAME)) {
1097                 err("cannot reserve MMIO region\n");
1098                 rc = -ENOMEM;
1099                 goto err_free_bus;
1100         }
1101
1102         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1103                                         pci_resource_len(pdev, 0));
1104         if (!ctrl->hpc_reg) {
1105                 err("cannot remap MMIO region %llx @ %llx\n",
1106                     (unsigned long long)pci_resource_len(pdev, 0),
1107                     (unsigned long long)pci_resource_start(pdev, 0));
1108                 rc = -ENODEV;
1109                 goto err_free_mem_region;
1110         }
1111
1112         // Check for 66Mhz operation
1113         ctrl->speed = get_controller_speed(ctrl);
1114
1115
1116         /********************************************************
1117          *
1118          *              Save configuration headers for this and
1119          *              subordinate PCI buses
1120          *
1121          ********************************************************/
1122
1123         // find the physical slot number of the first hot plug slot
1124
1125         /* Get slot won't work for devices behind bridges, but
1126          * in this case it will always be called for the "base"
1127          * bus/dev/func of a slot.
1128          * CS: this is leveraging the PCIIRQ routing code from the kernel
1129          * (pci-pc.c: get_irq_routing_table) */
1130         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1131                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1132                                 &(ctrl->first_slot));
1133         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1134                                 ctrl->first_slot, rc);
1135         if (rc) {
1136                 err(msg_initialization_err, rc);
1137                 goto err_iounmap;
1138         }
1139
1140         // Store PCI Config Space for all devices on this bus
1141         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1142         if (rc) {
1143                 err("%s: unable to save PCI configuration data, error %d\n",
1144                                 __func__, rc);
1145                 goto err_iounmap;
1146         }
1147
1148         /*
1149          * Get IO, memory, and IRQ resources for new devices
1150          */
1151         // The next line is required for cpqhp_find_available_resources
1152         ctrl->interrupt = pdev->irq;
1153         if (ctrl->interrupt < 0x10) {
1154                 cpqhp_legacy_mode = 1;
1155                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1156         }
1157
1158         ctrl->cfgspc_irq = 0;
1159         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1160
1161         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1162         ctrl->add_support = !rc;
1163         if (rc) {
1164                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1165                 err("unable to locate PCI configuration resources for hot plug add.\n");
1166                 goto err_iounmap;
1167         }
1168
1169         /*
1170          * Finish setting up the hot plug ctrl device
1171          */
1172         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1173         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1174
1175         ctrl->next_event = 0;
1176
1177         /* Setup the slot information structures */
1178         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1179         if (rc) {
1180                 err(msg_initialization_err, 6);
1181                 err("%s: unable to save PCI configuration data, error %d\n",
1182                         __func__, rc);
1183                 goto err_iounmap;
1184         }
1185
1186         /* Mask all general input interrupts */
1187         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1188
1189         /* set up the interrupt */
1190         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1191         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1192                         IRQF_SHARED, MY_NAME, ctrl)) {
1193                 err("Can't get irq %d for the hotplug pci controller\n",
1194                         ctrl->interrupt);
1195                 rc = -ENODEV;
1196                 goto err_iounmap;
1197         }
1198
1199         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1200         temp_word = readw(ctrl->hpc_reg + MISC);
1201         temp_word |= 0x4006;
1202         writew(temp_word, ctrl->hpc_reg + MISC);
1203
1204         // Changed 05/05/97 to clear all interrupts at start
1205         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1206
1207         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1208
1209         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1210
1211         if (!cpqhp_ctrl_list) {
1212                 cpqhp_ctrl_list = ctrl;
1213                 ctrl->next = NULL;
1214         } else {
1215                 ctrl->next = cpqhp_ctrl_list;
1216                 cpqhp_ctrl_list = ctrl;
1217         }
1218
1219         // turn off empty slots here unless command line option "ON" set
1220         // Wait for exclusive access to hardware
1221         mutex_lock(&ctrl->crit_sect);
1222
1223         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1224
1225         // find first device number for the ctrl
1226         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1227
1228         while (num_of_slots) {
1229                 dbg("num_of_slots: %d\n", num_of_slots);
1230                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1231                 if (!func)
1232                         break;
1233
1234                 hp_slot = func->device - ctrl->slot_device_offset;
1235                 dbg("hp_slot: %d\n", hp_slot);
1236
1237                 // We have to save the presence info for these slots
1238                 temp_word = ctrl->ctrl_int_comp >> 16;
1239                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1240                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1241
1242                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1243                         func->switch_save = 0;
1244                 } else {
1245                         func->switch_save = 0x10;
1246                 }
1247
1248                 if (!power_mode) {
1249                         if (!func->is_a_board) {
1250                                 green_LED_off(ctrl, hp_slot);
1251                                 slot_disable(ctrl, hp_slot);
1252                         }
1253                 }
1254
1255                 device++;
1256                 num_of_slots--;
1257         }
1258
1259         if (!power_mode) {
1260                 set_SOGO(ctrl);
1261                 // Wait for SOBS to be unset
1262                 wait_for_ctrl_irq(ctrl);
1263         }
1264
1265         rc = init_SERR(ctrl);
1266         if (rc) {
1267                 err("init_SERR failed\n");
1268                 mutex_unlock(&ctrl->crit_sect);
1269                 goto err_free_irq;
1270         }
1271
1272         // Done with exclusive hardware access
1273         mutex_unlock(&ctrl->crit_sect);
1274
1275         cpqhp_create_debugfs_files(ctrl);
1276
1277         return 0;
1278
1279 err_free_irq:
1280         free_irq(ctrl->interrupt, ctrl);
1281 err_iounmap:
1282         iounmap(ctrl->hpc_reg);
1283 err_free_mem_region:
1284         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1285 err_free_bus:
1286         kfree(ctrl->pci_bus);
1287 err_free_ctrl:
1288         kfree(ctrl);
1289 err_disable_device:
1290         pci_disable_device(pdev);
1291         return rc;
1292 }
1293
1294
1295 static int one_time_init(void)
1296 {
1297         int loop;
1298         int retval = 0;
1299
1300         if (initialized)
1301                 return 0;
1302
1303         power_mode = 0;
1304
1305         retval = pci_print_IRQ_route();
1306         if (retval)
1307                 goto error;
1308
1309         dbg("Initialize + Start the notification mechanism \n");
1310
1311         retval = cpqhp_event_start_thread();
1312         if (retval)
1313                 goto error;
1314
1315         dbg("Initialize slot lists\n");
1316         for (loop = 0; loop < 256; loop++) {
1317                 cpqhp_slot_list[loop] = NULL;
1318         }
1319
1320         // FIXME: We also need to hook the NMI handler eventually.
1321         // this also needs to be worked with Christoph
1322         // register_NMI_handler();
1323
1324         // Map rom address
1325         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1326         if (!cpqhp_rom_start) {
1327                 err ("Could not ioremap memory region for ROM\n");
1328                 retval = -EIO;
1329                 goto error;
1330         }
1331
1332         /* Now, map the int15 entry point if we are on compaq specific hardware */
1333         compaq_nvram_init(cpqhp_rom_start);
1334
1335         /* Map smbios table entry point structure */
1336         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1337                                         cpqhp_rom_start + ROM_PHY_LEN);
1338         if (!smbios_table) {
1339                 err ("Could not find the SMBIOS pointer in memory\n");
1340                 retval = -EIO;
1341                 goto error_rom_start;
1342         }
1343
1344         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1345                                         readw(smbios_table + ST_LENGTH));
1346         if (!smbios_start) {
1347                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1348                 retval = -EIO;
1349                 goto error_smbios_start;
1350         }
1351
1352         initialized = 1;
1353
1354         return retval;
1355
1356 error_smbios_start:
1357         iounmap(smbios_start);
1358 error_rom_start:
1359         iounmap(cpqhp_rom_start);
1360 error:
1361         return retval;
1362 }
1363
1364
1365 static void __exit unload_cpqphpd(void)
1366 {
1367         struct pci_func *next;
1368         struct pci_func *TempSlot;
1369         int loop;
1370         u32 rc;
1371         struct controller *ctrl;
1372         struct controller *tctrl;
1373         struct pci_resource *res;
1374         struct pci_resource *tres;
1375
1376         rc = compaq_nvram_store(cpqhp_rom_start);
1377
1378         ctrl = cpqhp_ctrl_list;
1379
1380         while (ctrl) {
1381                 if (ctrl->hpc_reg) {
1382                         u16 misc;
1383                         rc = read_slot_enable (ctrl);
1384
1385                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1386                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1387
1388                         misc = readw(ctrl->hpc_reg + MISC);
1389                         misc &= 0xFFFD;
1390                         writew(misc, ctrl->hpc_reg + MISC);
1391                 }
1392
1393                 ctrl_slot_cleanup(ctrl);
1394
1395                 res = ctrl->io_head;
1396                 while (res) {
1397                         tres = res;
1398                         res = res->next;
1399                         kfree(tres);
1400                 }
1401
1402                 res = ctrl->mem_head;
1403                 while (res) {
1404                         tres = res;
1405                         res = res->next;
1406                         kfree(tres);
1407                 }
1408
1409                 res = ctrl->p_mem_head;
1410                 while (res) {
1411                         tres = res;
1412                         res = res->next;
1413                         kfree(tres);
1414                 }
1415
1416                 res = ctrl->bus_head;
1417                 while (res) {
1418                         tres = res;
1419                         res = res->next;
1420                         kfree(tres);
1421                 }
1422
1423                 kfree (ctrl->pci_bus);
1424
1425                 tctrl = ctrl;
1426                 ctrl = ctrl->next;
1427                 kfree(tctrl);
1428         }
1429
1430         for (loop = 0; loop < 256; loop++) {
1431                 next = cpqhp_slot_list[loop];
1432                 while (next != NULL) {
1433                         res = next->io_head;
1434                         while (res) {
1435                                 tres = res;
1436                                 res = res->next;
1437                                 kfree(tres);
1438                         }
1439
1440                         res = next->mem_head;
1441                         while (res) {
1442                                 tres = res;
1443                                 res = res->next;
1444                                 kfree(tres);
1445                         }
1446
1447                         res = next->p_mem_head;
1448                         while (res) {
1449                                 tres = res;
1450                                 res = res->next;
1451                                 kfree(tres);
1452                         }
1453
1454                         res = next->bus_head;
1455                         while (res) {
1456                                 tres = res;
1457                                 res = res->next;
1458                                 kfree(tres);
1459                         }
1460
1461                         TempSlot = next;
1462                         next = next->next;
1463                         kfree(TempSlot);
1464                 }
1465         }
1466
1467         // Stop the notification mechanism
1468         if (initialized)
1469                 cpqhp_event_stop_thread();
1470
1471         //unmap the rom address
1472         if (cpqhp_rom_start)
1473                 iounmap(cpqhp_rom_start);
1474         if (smbios_start)
1475                 iounmap(smbios_start);
1476 }
1477
1478
1479
1480 static struct pci_device_id hpcd_pci_tbl[] = {
1481         {
1482         /* handle any PCI Hotplug controller */
1483         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1484         .class_mask =   ~0,
1485
1486         /* no matter who makes it */
1487         .vendor =       PCI_ANY_ID,
1488         .device =       PCI_ANY_ID,
1489         .subvendor =    PCI_ANY_ID,
1490         .subdevice =    PCI_ANY_ID,
1491
1492         }, { /* end: all zeroes */ }
1493 };
1494
1495 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1496
1497
1498
1499 static struct pci_driver cpqhpc_driver = {
1500         .name =         "compaq_pci_hotplug",
1501         .id_table =     hpcd_pci_tbl,
1502         .probe =        cpqhpc_probe,
1503         /* remove:      cpqhpc_remove_one, */
1504 };
1505
1506
1507
1508 static int __init cpqhpc_init(void)
1509 {
1510         int result;
1511
1512         cpqhp_debug = debug;
1513
1514         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1515         cpqhp_initialize_debugfs();
1516         result = pci_register_driver(&cpqhpc_driver);
1517         dbg("pci_register_driver = %d\n", result);
1518         return result;
1519 }
1520
1521
1522 static void __exit cpqhpc_cleanup(void)
1523 {
1524         dbg("unload_cpqphpd()\n");
1525         unload_cpqphpd();
1526
1527         dbg("pci_unregister_driver\n");
1528         pci_unregister_driver(&cpqhpc_driver);
1529         cpqhp_shutdown_debugfs();
1530 }
1531
1532
1533 module_init(cpqhpc_init);
1534 module_exit(cpqhpc_cleanup);
1535
1536