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/i386/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  *
 121  * @begin: begin pointer for region to be scanned.
 122  * @end: end pointer for region to be scanned.
 123  *
 124  * Returns pointer to the head of the SMBIOS tables (or NULL)
 125  *
 126  */
 127 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
 128 {
 129         void __iomem *fp;
 130         void __iomem *endp;
 131         u8 temp1, temp2, temp3, temp4;
 132         int status = 0;
 133
 134         endp = (end - sizeof(u32) + 1);
 135
 136         for (fp = begin; fp <= endp; fp += 16) {
 137                 temp1 = readb(fp);
 138                 temp2 = readb(fp+1);
 139                 temp3 = readb(fp+2);
 140                 temp4 = readb(fp+3);
 141                 if (temp1 == '_' &&
 142                     temp2 == 'S' &&
 143                     temp3 == 'M' &&
 144                     temp4 == '_') {
 145                         status = 1;
 146                         break;
 147                 }
 148         }
 149
 150         if (!status)
 151                 fp = NULL;
 152
 153         dbg("Discovered SMBIOS Entry point at %p\n", fp);
 154
 155         return fp;
 156 }
 157
 158 /**
 159  * init_SERR - Initializes the per slot SERR generation.
 160  *
 161  * For unexpected switch opens
 162  *
 163  */
 164 static int init_SERR(struct controller * ctrl)
 165 {
 166         u32 tempdword;
 167         u32 number_of_slots;
 168         u8 physical_slot;
 169
 170         if (!ctrl)
 171                 return 1;
 172
 173         tempdword = ctrl->first_slot;
 174
 175         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 176         // Loop through slots
 177         while (number_of_slots) {
 178                 physical_slot = tempdword;
 179                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
 180                 tempdword++;
 181                 number_of_slots--;
 182         }
 183
 184         return 0;
 185 }
 186
 187
 188 /* nice debugging output */
 189 static int pci_print_IRQ_route (void)
 190 {
 191         struct irq_routing_table *routing_table;
 192         int len;
 193         int loop;
 194
 195         u8 tbus, tdevice, tslot;
 196
 197         routing_table = pcibios_get_irq_routing_table();
 198         if (routing_table == NULL) {
 199                 err("No BIOS Routing Table??? Not good\n");
 200                 return -ENOMEM;
 201         }
 202
 203         len = (routing_table->size - sizeof(struct irq_routing_table)) /
 204                         sizeof(struct irq_info);
 205         // Make sure I got at least one entry
 206         if (len == 0) {
 207                 kfree(routing_table);
 208                 return -1;
 209         }
 210
 211         dbg("bus dev func slot\n");
 212
 213         for (loop = 0; loop < len; ++loop) {
 214                 tbus = routing_table->slots[loop].bus;
 215                 tdevice = routing_table->slots[loop].devfn;
 216                 tslot = routing_table->slots[loop].slot;
 217                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 218
 219         }
 220         kfree(routing_table);
 221         return 0;
 222 }
 223
 224
 225 /**
 226  * get_subsequent_smbios_entry: get the next entry from bios table.
 227  *
 228  * Gets the first entry if previous == NULL
 229  * Otherwise, returns the next entry
 230  * Uses global SMBIOS Table pointer
 231  *
 232  * @curr: %NULL or pointer to previously returned structure
 233  *
 234  * returns a pointer to an SMBIOS structure or NULL if none found
 235  */
 236 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 237                                                 void __iomem *smbios_table,
 238                                                 void __iomem *curr)
 239 {
 240         u8 bail = 0;
 241         u8 previous_byte = 1;
 242         void __iomem *p_temp;
 243         void __iomem *p_max;
 244
 245         if (!smbios_table || !curr)
 246                 return(NULL);
 247
 248         // set p_max to the end of the table
 249         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 250
 251         p_temp = curr;
 252         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 253
 254         while ((p_temp < p_max) && !bail) {
 255                 /* Look for the double NULL terminator
 256                  * The first condition is the previous byte
 257                  * and the second is the curr */
 258                 if (!previous_byte && !(readb(p_temp))) {
 259                         bail = 1;
 260                 }
 261
 262                 previous_byte = readb(p_temp);
 263                 p_temp++;
 264         }
 265
 266         if (p_temp < p_max) {
 267                 return p_temp;
 268         } else {
 269                 return NULL;
 270         }
 271 }
 272
 273
 274 /**
 275  * get_SMBIOS_entry
 276  *
 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", __FUNCTION__, hotplug_slot->name);
 319
 320         kfree(slot->hotplug_slot->info);
 321         kfree(slot->hotplug_slot->name);
 322         kfree(slot->hotplug_slot);
 323         kfree(slot);
 324 }
 325
 326 static int ctrl_slot_setup(struct controller *ctrl,
 327                         void __iomem *smbios_start,
 328                         void __iomem *smbios_table)
 329 {
 330         struct slot *slot;
 331         struct hotplug_slot *hotplug_slot;
 332         struct hotplug_slot_info *hotplug_slot_info;
 333         u8 number_of_slots;
 334         u8 slot_device;
 335         u8 slot_number;
 336         u8 ctrl_slot;
 337         u32 tempdword;
 338         void __iomem *slot_entry= NULL;
 339         int result = -ENOMEM;
 340
 341         dbg("%s\n", __FUNCTION__);
 342
 343         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 344
 345         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 346         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
 347         slot_number = ctrl->first_slot;
 348
 349         while (number_of_slots) {
 350                 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 351                 if (!slot)
 352                         goto error;
 353
 354                 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
 355                                                 GFP_KERNEL);
 356                 if (!slot->hotplug_slot)
 357                         goto error_slot;
 358                 hotplug_slot = slot->hotplug_slot;
 359
 360                 hotplug_slot->info =
 361                                 kzalloc(sizeof(*(hotplug_slot->info)),
 362                                                         GFP_KERNEL);
 363                 if (!hotplug_slot->info)
 364                         goto error_hpslot;
 365                 hotplug_slot_info = hotplug_slot->info;
 366                 hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
 367
 368                 if (!hotplug_slot->name)
 369                         goto error_info;
 370
 371                 slot->ctrl = ctrl;
 372                 slot->bus = ctrl->bus;
 373                 slot->device = slot_device;
 374                 slot->number = slot_number;
 375                 dbg("slot->number = %d\n", slot->number);
 376
 377                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
 378                                         slot_entry);
 379
 380                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
 381                                 slot->number)) {
 382                         slot_entry = get_SMBIOS_entry(smbios_start,
 383                                                 smbios_table, 9, slot_entry);
 384                 }
 385
 386                 slot->p_sm_slot = slot_entry;
 387
 388                 init_timer(&slot->task_event);
 389                 slot->task_event.expires = jiffies + 5 * HZ;
 390                 slot->task_event.function = cpqhp_pushbutton_thread;
 391
 392                 //FIXME: these capabilities aren't used but if they are
 393                 //       they need to be correctly implemented
 394                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
 395                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
 396
 397                 if (is_slot64bit(slot))
 398                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
 399                 if (is_slot66mhz(slot))
 400                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
 401                 if (ctrl->speed == PCI_SPEED_66MHz)
 402                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
 403
 404                 ctrl_slot =
 405                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
 406
 407                 // Check presence
 408                 slot->capabilities |=
 409                         ((((~tempdword) >> 23) |
 410                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
 411                 // Check the switch state
 412                 slot->capabilities |=
 413                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
 414                 // Check the slot enable
 415                 slot->capabilities |=
 416                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
 417
 418                 /* register this slot with the hotplug pci core */
 419                 hotplug_slot->release = &release_slot;
 420                 hotplug_slot->private = slot;
 421                 make_slot_name(hotplug_slot->name, SLOT_NAME_SIZE, slot);
 422                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
 423
 424                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
 425                 hotplug_slot_info->attention_status =
 426                         cpq_get_attention_status(ctrl, slot);
 427                 hotplug_slot_info->latch_status =
 428                         cpq_get_latch_status(ctrl, slot);
 429                 hotplug_slot_info->adapter_status =
 430                         get_presence_status(ctrl, slot);
 431
 432                 dbg("registering bus %d, dev %d, number %d, "
 433                                 "ctrl->slot_device_offset %d, slot %d\n",
 434                                 slot->bus, slot->device,
 435                                 slot->number, ctrl->slot_device_offset,
 436                                 slot_number);
 437                 result = pci_hp_register(hotplug_slot);
 438                 if (result) {
 439                         err("pci_hp_register failed with error %d\n", result);
 440                         goto error_name;
 441                 }
 442
 443                 slot->next = ctrl->slot;
 444                 ctrl->slot = slot;
 445
 446                 number_of_slots--;
 447                 slot_device++;
 448                 slot_number++;
 449         }
 450
 451         return 0;
 452 error_name:
 453         kfree(hotplug_slot->name);
 454 error_info:
 455         kfree(hotplug_slot_info);
 456 error_hpslot:
 457         kfree(hotplug_slot);
 458 error_slot:
 459         kfree(slot);
 460 error:
 461         return result;
 462 }
 463
 464 static int ctrl_slot_cleanup (struct controller * ctrl)
 465 {
 466         struct slot *old_slot, *next_slot;
 467
 468         old_slot = ctrl->slot;
 469         ctrl->slot = NULL;
 470
 471         while (old_slot) {
 472                 /* memory will be freed by the release_slot callback */
 473                 next_slot = old_slot->next;
 474                 pci_hp_deregister (old_slot->hotplug_slot);
 475                 old_slot = next_slot;
 476         }
 477
 478         cpqhp_remove_debugfs_files(ctrl);
 479
 480         //Free IRQ associated with hot plug device
 481         free_irq(ctrl->interrupt, ctrl);
 482         //Unmap the memory
 483         iounmap(ctrl->hpc_reg);
 484         //Finally reclaim PCI mem
 485         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 486                            pci_resource_len(ctrl->pci_dev, 0));
 487
 488         return(0);
 489 }
 490
 491
 492 //============================================================================
 493 // function:    get_slot_mapping
 494 //
 495 // Description: Attempts to determine a logical slot mapping for a PCI
 496 //              device.  Won't work for more than one PCI-PCI bridge
 497 //              in a slot.
 498 //
 499 // Input:       u8 bus_num - bus number of PCI device
 500 //              u8 dev_num - device number of PCI device
 501 //              u8 *slot - Pointer to u8 where slot number will
 502 //                      be returned
 503 //
 504 // Output:      SUCCESS or FAILURE
 505 //=============================================================================
 506 static int
 507 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 508 {
 509         struct irq_routing_table *PCIIRQRoutingInfoLength;
 510         u32 work;
 511         long len;
 512         long loop;
 513
 514         u8 tbus, tdevice, tslot, bridgeSlot;
 515
 516         dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot);
 517
 518         bridgeSlot = 0xFF;
 519
 520         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 521         if (!PCIIRQRoutingInfoLength)
 522                 return -1;
 523
 524         len = (PCIIRQRoutingInfoLength->size -
 525                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 526         // Make sure I got at least one entry
 527         if (len == 0) {
 528                 kfree(PCIIRQRoutingInfoLength);
 529                 return -1;
 530         }
 531
 532         for (loop = 0; loop < len; ++loop) {
 533                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 534                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
 535                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 536
 537                 if ((tbus == bus_num) && (tdevice == dev_num)) {
 538                         *slot = tslot;
 539                         kfree(PCIIRQRoutingInfoLength);
 540                         return 0;
 541                 } else {
 542                         /* Did not get a match on the target PCI device. Check
 543                          * if the current IRQ table entry is a PCI-to-PCI bridge
 544                          * device.  If so, and it's secondary bus matches the
 545                          * bus number for the target device, I need to save the
 546                          * bridge's slot number.  If I can not find an entry for
 547                          * the target device, I will have to assume it's on the
 548                          * other side of the bridge, and assign it the bridge's
 549                          * slot. */
 550                         bus->number = tbus;
 551                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 552                                                 PCI_REVISION_ID, &work);
 553
 554                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 555                                 pci_bus_read_config_dword(bus,
 556                                                         PCI_DEVFN(tdevice, 0),
 557                                                         PCI_PRIMARY_BUS, &work);
 558                                 // See if bridge's secondary bus matches target bus.
 559                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
 560                                         bridgeSlot = tslot;
 561                                 }
 562                         }
 563                 }
 564
 565         }
 566
 567         // If we got here, we didn't find an entry in the IRQ mapping table
 568         // for the target PCI device.  If we did determine that the target
 569         // device is on the other side of a PCI-to-PCI bridge, return the
 570         // slot number for the bridge.
 571         if (bridgeSlot != 0xFF) {
 572                 *slot = bridgeSlot;
 573                 kfree(PCIIRQRoutingInfoLength);
 574                 return 0;
 575         }
 576         kfree(PCIIRQRoutingInfoLength);
 577         // Couldn't find an entry in the routing table for this PCI device
 578         return -1;
 579 }
 580
 581
 582 /**
 583  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 584  *
 585  */
 586 static int
 587 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 588                                 u32 status)
 589 {
 590         u8 hp_slot;
 591
 592         if (func == NULL)
 593                 return(1);
 594
 595         hp_slot = func->device - ctrl->slot_device_offset;
 596
 597         // Wait for exclusive access to hardware
 598         mutex_lock(&ctrl->crit_sect);
 599
 600         if (status == 1) {
 601                 amber_LED_on (ctrl, hp_slot);
 602         } else if (status == 0) {
 603                 amber_LED_off (ctrl, hp_slot);
 604         } else {
 605                 // Done with exclusive hardware access
 606                 mutex_unlock(&ctrl->crit_sect);
 607                 return(1);
 608         }
 609
 610         set_SOGO(ctrl);
 611
 612         // Wait for SOBS to be unset
 613         wait_for_ctrl_irq (ctrl);
 614
 615         // Done with exclusive hardware access
 616         mutex_unlock(&ctrl->crit_sect);
 617
 618         return(0);
 619 }
 620
 621
 622 /**
 623  * set_attention_status - Turns the Amber LED for a slot on or off
 624  *
 625  */
 626 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 627 {
 628         struct pci_func *slot_func;
 629         struct slot *slot = hotplug_slot->private;
 630         struct controller *ctrl = slot->ctrl;
 631         u8 bus;
 632         u8 devfn;
 633         u8 device;
 634         u8 function;
 635
 636         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 637
 638         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 639                 return -ENODEV;
 640
 641         device = devfn >> 3;
 642         function = devfn & 0x7;
 643         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 644
 645         slot_func = cpqhp_slot_find(bus, device, function);
 646         if (!slot_func)
 647                 return -ENODEV;
 648
 649         return cpqhp_set_attention_status(ctrl, slot_func, status);
 650 }
 651
 652
 653 static int process_SI(struct hotplug_slot *hotplug_slot)
 654 {
 655         struct pci_func *slot_func;
 656         struct slot *slot = hotplug_slot->private;
 657         struct controller *ctrl = slot->ctrl;
 658         u8 bus;
 659         u8 devfn;
 660         u8 device;
 661         u8 function;
 662
 663         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 664
 665         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 666                 return -ENODEV;
 667
 668         device = devfn >> 3;
 669         function = devfn & 0x7;
 670         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 671
 672         slot_func = cpqhp_slot_find(bus, device, function);
 673         if (!slot_func)
 674                 return -ENODEV;
 675
 676         slot_func->bus = bus;
 677         slot_func->device = device;
 678         slot_func->function = function;
 679         slot_func->configured = 0;
 680         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 681         return cpqhp_process_SI(ctrl, slot_func);
 682 }
 683
 684
 685 static int process_SS(struct hotplug_slot *hotplug_slot)
 686 {
 687         struct pci_func *slot_func;
 688         struct slot *slot = hotplug_slot->private;
 689         struct controller *ctrl = slot->ctrl;
 690         u8 bus;
 691         u8 devfn;
 692         u8 device;
 693         u8 function;
 694
 695         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 696
 697         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 698                 return -ENODEV;
 699
 700         device = devfn >> 3;
 701         function = devfn & 0x7;
 702         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 703
 704         slot_func = cpqhp_slot_find(bus, device, function);
 705         if (!slot_func)
 706                 return -ENODEV;
 707
 708         dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
 709         return cpqhp_process_SS(ctrl, slot_func);
 710 }
 711
 712
 713 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 714 {
 715         struct slot *slot = hotplug_slot->private;
 716         struct controller *ctrl = slot->ctrl;
 717
 718         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 719
 720         return cpqhp_hardware_test(ctrl, value);
 721 }
 722
 723
 724 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 725 {
 726         struct slot *slot = hotplug_slot->private;
 727         struct controller *ctrl = slot->ctrl;
 728
 729         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 730
 731         *value = get_slot_enabled(ctrl, slot);
 732         return 0;
 733 }
 734
 735 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 736 {
 737         struct slot *slot = hotplug_slot->private;
 738         struct controller *ctrl = slot->ctrl;
 739
 740         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 741
 742         *value = cpq_get_attention_status(ctrl, slot);
 743         return 0;
 744 }
 745
 746 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 747 {
 748         struct slot *slot = hotplug_slot->private;
 749         struct controller *ctrl = slot->ctrl;
 750
 751         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 752
 753         *value = cpq_get_latch_status(ctrl, slot);
 754
 755         return 0;
 756 }
 757
 758 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 759 {
 760         struct slot *slot = hotplug_slot->private;
 761         struct controller *ctrl = slot->ctrl;
 762
 763         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 764
 765         *value = get_presence_status(ctrl, slot);
 766
 767         return 0;
 768 }
 769
 770 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 771 {
 772         struct slot *slot = hotplug_slot->private;
 773         struct controller *ctrl = slot->ctrl;
 774
 775         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 776
 777         *value = ctrl->speed_capability;
 778
 779         return 0;
 780 }
 781
 782 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 783 {
 784         struct slot *slot = hotplug_slot->private;
 785         struct controller *ctrl = slot->ctrl;
 786
 787         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 788
 789         *value = ctrl->speed;
 790
 791         return 0;
 792 }
 793
 794 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 795 {
 796         u8 num_of_slots = 0;
 797         u8 hp_slot = 0;
 798         u8 device;
 799         u8 bus_cap;
 800         u16 temp_word;
 801         u16 vendor_id;
 802         u16 subsystem_vid;
 803         u16 subsystem_deviceid;
 804         u32 rc;
 805         struct controller *ctrl;
 806         struct pci_func *func;
 807         int err;
 808
 809         err = pci_enable_device(pdev);
 810         if (err) {
 811                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 812                         pci_name(pdev), err);
 813                 return err;
 814         }
 815
 816         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
 817         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
 818         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
 819                 err(msg_HPC_non_compaq_or_intel);
 820                 rc = -ENODEV;
 821                 goto err_disable_device;
 822         }
 823         dbg("Vendor ID: %x\n", vendor_id);
 824
 825         dbg("revision: %d\n", pdev->revision);
 826         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 827                 err(msg_HPC_rev_error);
 828                 rc = -ENODEV;
 829                 goto err_disable_device;
 830         }
 831
 832         /* Check for the proper subsytem ID's
 833          * Intel uses a different SSID programming model than Compaq.
 834          * For Intel, each SSID bit identifies a PHP capability.
 835          * Also Intel HPC's may have RID=0.
 836          */
 837         if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 838                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
 839                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 840                 if (rc) {
 841                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 842                         goto err_disable_device;
 843                 }
 844                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 845                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 846                         err(msg_HPC_non_compaq_or_intel);
 847                         rc = -ENODEV;
 848                         goto err_disable_device;
 849                 }
 850
 851                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 852                 if (!ctrl) {
 853                         err("%s : out of memory\n", __FUNCTION__);
 854                         rc = -ENOMEM;
 855                         goto err_disable_device;
 856                 }
 857
 858                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 859                 if (rc) {
 860                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 861                         goto err_free_ctrl;
 862                 }
 863
 864                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 865
 866                 /* Set Vendor ID, so it can be accessed later from other functions */
 867                 ctrl->vendor_id = vendor_id;
 868
 869                 switch (subsystem_vid) {
 870                         case PCI_VENDOR_ID_COMPAQ:
 871                                 if (pdev->revision >= 0x13) { /* CIOBX */
 872                                         ctrl->push_flag = 1;
 873                                         ctrl->slot_switch_type = 1;
 874                                         ctrl->push_button = 1;
 875                                         ctrl->pci_config_space = 1;
 876                                         ctrl->defeature_PHP = 1;
 877                                         ctrl->pcix_support = 1;
 878                                         ctrl->pcix_speed_capability = 1;
 879                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 880                                         if (bus_cap & 0x80) {
 881                                                 dbg("bus max supports 133MHz PCI-X\n");
 882                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 883                                                 break;
 884                                         }
 885                                         if (bus_cap & 0x40) {
 886                                                 dbg("bus max supports 100MHz PCI-X\n");
 887                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 888                                                 break;
 889                                         }
 890                                         if (bus_cap & 20) {
 891                                                 dbg("bus max supports 66MHz PCI-X\n");
 892                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 893                                                 break;
 894                                         }
 895                                         if (bus_cap & 10) {
 896                                                 dbg("bus max supports 66MHz PCI\n");
 897                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 898                                                 break;
 899                                         }
 900
 901                                         break;
 902                                 }
 903
 904                                 switch (subsystem_deviceid) {
 905                                         case PCI_SUB_HPC_ID:
 906                                                 /* Original 6500/7000 implementation */
 907                                                 ctrl->slot_switch_type = 1;
 908                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 909                                                 ctrl->push_button = 0;
 910                                                 ctrl->pci_config_space = 1;
 911                                                 ctrl->defeature_PHP = 1;
 912                                                 ctrl->pcix_support = 0;
 913                                                 ctrl->pcix_speed_capability = 0;
 914                                                 break;
 915                                         case PCI_SUB_HPC_ID2:
 916                                                 /* First Pushbutton implementation */
 917                                                 ctrl->push_flag = 1;
 918                                                 ctrl->slot_switch_type = 1;
 919                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 920                                                 ctrl->push_button = 1;
 921                                                 ctrl->pci_config_space = 1;
 922                                                 ctrl->defeature_PHP = 1;
 923                                                 ctrl->pcix_support = 0;
 924                                                 ctrl->pcix_speed_capability = 0;
 925                                                 break;
 926                                         case PCI_SUB_HPC_ID_INTC:
 927                                                 /* Third party (6500/7000) */
 928                                                 ctrl->slot_switch_type = 1;
 929                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 930                                                 ctrl->push_button = 0;
 931                                                 ctrl->pci_config_space = 1;
 932                                                 ctrl->defeature_PHP = 1;
 933                                                 ctrl->pcix_support = 0;
 934                                                 ctrl->pcix_speed_capability = 0;
 935                                                 break;
 936                                         case PCI_SUB_HPC_ID3:
 937                                                 /* First 66 Mhz implementation */
 938                                                 ctrl->push_flag = 1;
 939                                                 ctrl->slot_switch_type = 1;
 940                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 941                                                 ctrl->push_button = 1;
 942                                                 ctrl->pci_config_space = 1;
 943                                                 ctrl->defeature_PHP = 1;
 944                                                 ctrl->pcix_support = 0;
 945                                                 ctrl->pcix_speed_capability = 0;
 946                                                 break;
 947                                         case PCI_SUB_HPC_ID4:
 948                                                 /* First PCI-X implementation, 100MHz */
 949                                                 ctrl->push_flag = 1;
 950                                                 ctrl->slot_switch_type = 1;
 951                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 952                                                 ctrl->push_button = 1;
 953                                                 ctrl->pci_config_space = 1;
 954                                                 ctrl->defeature_PHP = 1;
 955                                                 ctrl->pcix_support = 1;
 956                                                 ctrl->pcix_speed_capability = 0;
 957                                                 break;
 958                                         default:
 959                                                 err(msg_HPC_not_supported);
 960                                                 rc = -ENODEV;
 961                                                 goto err_free_ctrl;
 962                                 }
 963                                 break;
 964
 965                         case PCI_VENDOR_ID_INTEL:
 966                                 /* Check for speed capability (0=33, 1=66) */
 967                                 if (subsystem_deviceid & 0x0001) {
 968                                         ctrl->speed_capability = PCI_SPEED_66MHz;
 969                                 } else {
 970                                         ctrl->speed_capability = PCI_SPEED_33MHz;
 971                                 }
 972
 973                                 /* Check for push button */
 974                                 if (subsystem_deviceid & 0x0002) {
 975                                         /* no push button */
 976                                         ctrl->push_button = 0;
 977                                 } else {
 978                                         /* push button supported */
 979                                         ctrl->push_button = 1;
 980                                 }
 981
 982                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
 983                                 if (subsystem_deviceid & 0x0004) {
 984                                         /* no switch */
 985                                         ctrl->slot_switch_type = 0;
 986                                 } else {
 987                                         /* switch */
 988                                         ctrl->slot_switch_type = 1;
 989                                 }
 990
 991                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
 992                                 if (subsystem_deviceid & 0x0008) {
 993                                         ctrl->defeature_PHP = 1;        // PHP supported
 994                                 } else {
 995                                         ctrl->defeature_PHP = 0;        // PHP not supported
 996                                 }
 997
 998                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
 999                                 if (subsystem_deviceid & 0x0010) {
1000                                         ctrl->alternate_base_address = 1;       // supported
1001                                 } else {
1002                                         ctrl->alternate_base_address = 0;       // not supported
1003                                 }
1004
1005                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1006                                 if (subsystem_deviceid & 0x0020) {
1007                                         ctrl->pci_config_space = 1;             // supported
1008                                 } else {
1009                                         ctrl->pci_config_space = 0;             // not supported
1010                                 }
1011
1012                                 /* PCI-X support */
1013                                 if (subsystem_deviceid & 0x0080) {
1014                                         /* PCI-X capable */
1015                                         ctrl->pcix_support = 1;
1016                                         /* Frequency of operation in PCI-X mode */
1017                                         if (subsystem_deviceid & 0x0040) {
1018                                                 /* 133MHz PCI-X if bit 7 is 1 */
1019                                                 ctrl->pcix_speed_capability = 1;
1020                                         } else {
1021                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1022                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1023                                                 ctrl->pcix_speed_capability = 0;
1024                                         }
1025                                 } else {
1026                                         /* Conventional PCI */
1027                                         ctrl->pcix_support = 0;
1028                                         ctrl->pcix_speed_capability = 0;
1029                                 }
1030                                 break;
1031
1032                         default:
1033                                 err(msg_HPC_not_supported);
1034                                 rc = -ENODEV;
1035                                 goto err_free_ctrl;
1036                 }
1037
1038         } else {
1039                 err(msg_HPC_not_supported);
1040                 return -ENODEV;
1041         }
1042
1043         // Tell the user that we found one.
1044         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1045                                         pdev->bus->number);
1046
1047         dbg("Hotplug controller capabilities:\n");
1048         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1049         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1050                                         "switch present" : "no switch");
1051         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1052                                         "PHP supported" : "PHP not supported");
1053         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1054                                         "supported" : "not supported");
1055         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1056                                         "supported" : "not supported");
1057         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1058                                         "supported" : "not supported");
1059         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1060                                         "supported" : "not supported");
1061
1062         ctrl->pci_dev = pdev;
1063         pci_set_drvdata(pdev, ctrl);
1064
1065         /* make our own copy of the pci bus structure,
1066          * as we like tweaking it a lot */
1067         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1068         if (!ctrl->pci_bus) {
1069                 err("out of memory\n");
1070                 rc = -ENOMEM;
1071                 goto err_free_ctrl;
1072         }
1073         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1074
1075         ctrl->bus = pdev->bus->number;
1076         ctrl->rev = pdev->revision;
1077         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1078                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1079
1080         mutex_init(&ctrl->crit_sect);
1081         init_waitqueue_head(&ctrl->queue);
1082
1083         /* initialize our threads if they haven't already been started up */
1084         rc = one_time_init();
1085         if (rc) {
1086                 goto err_free_bus;
1087         }
1088
1089         dbg("pdev = %p\n", pdev);
1090         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1091         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1092
1093         if (!request_mem_region(pci_resource_start(pdev, 0),
1094                                 pci_resource_len(pdev, 0), MY_NAME)) {
1095                 err("cannot reserve MMIO region\n");
1096                 rc = -ENOMEM;
1097                 goto err_free_bus;
1098         }
1099
1100         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1101                                         pci_resource_len(pdev, 0));
1102         if (!ctrl->hpc_reg) {
1103                 err("cannot remap MMIO region %llx @ %llx\n",
1104                     (unsigned long long)pci_resource_len(pdev, 0),
1105                     (unsigned long long)pci_resource_start(pdev, 0));
1106                 rc = -ENODEV;
1107                 goto err_free_mem_region;
1108         }
1109
1110         // Check for 66Mhz operation
1111         ctrl->speed = get_controller_speed(ctrl);
1112
1113
1114         /********************************************************
1115          *
1116          *              Save configuration headers for this and
1117          *              subordinate PCI buses
1118          *
1119          ********************************************************/
1120
1121         // find the physical slot number of the first hot plug slot
1122
1123         /* Get slot won't work for devices behind bridges, but
1124          * in this case it will always be called for the "base"
1125          * bus/dev/func of a slot.
1126          * CS: this is leveraging the PCIIRQ routing code from the kernel
1127          * (pci-pc.c: get_irq_routing_table) */
1128         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1129                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1130                                 &(ctrl->first_slot));
1131         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1132                                 ctrl->first_slot, rc);
1133         if (rc) {
1134                 err(msg_initialization_err, rc);
1135                 goto err_iounmap;
1136         }
1137
1138         // Store PCI Config Space for all devices on this bus
1139         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1140         if (rc) {
1141                 err("%s: unable to save PCI configuration data, error %d\n",
1142                                 __FUNCTION__, rc);
1143                 goto err_iounmap;
1144         }
1145
1146         /*
1147          * Get IO, memory, and IRQ resources for new devices
1148          */
1149         // The next line is required for cpqhp_find_available_resources
1150         ctrl->interrupt = pdev->irq;
1151         if (ctrl->interrupt < 0x10) {
1152                 cpqhp_legacy_mode = 1;
1153                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1154         }
1155
1156         ctrl->cfgspc_irq = 0;
1157         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1158
1159         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1160         ctrl->add_support = !rc;
1161         if (rc) {
1162                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1163                 err("unable to locate PCI configuration resources for hot plug add.\n");
1164                 goto err_iounmap;
1165         }
1166
1167         /*
1168          * Finish setting up the hot plug ctrl device
1169          */
1170         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1171         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1172
1173         ctrl->next_event = 0;
1174
1175         /* Setup the slot information structures */
1176         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1177         if (rc) {
1178                 err(msg_initialization_err, 6);
1179                 err("%s: unable to save PCI configuration data, error %d\n",
1180                         __FUNCTION__, rc);
1181                 goto err_iounmap;
1182         }
1183
1184         /* Mask all general input interrupts */
1185         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1186
1187         /* set up the interrupt */
1188         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1189         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1190                         IRQF_SHARED, MY_NAME, ctrl)) {
1191                 err("Can't get irq %d for the hotplug pci controller\n",
1192                         ctrl->interrupt);
1193                 rc = -ENODEV;
1194                 goto err_iounmap;
1195         }
1196
1197         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1198         temp_word = readw(ctrl->hpc_reg + MISC);
1199         temp_word |= 0x4006;
1200         writew(temp_word, ctrl->hpc_reg + MISC);
1201
1202         // Changed 05/05/97 to clear all interrupts at start
1203         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1204
1205         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1206
1207         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1208
1209         if (!cpqhp_ctrl_list) {
1210                 cpqhp_ctrl_list = ctrl;
1211                 ctrl->next = NULL;
1212         } else {
1213                 ctrl->next = cpqhp_ctrl_list;
1214                 cpqhp_ctrl_list = ctrl;
1215         }
1216
1217         // turn off empty slots here unless command line option "ON" set
1218         // Wait for exclusive access to hardware
1219         mutex_lock(&ctrl->crit_sect);
1220
1221         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1222
1223         // find first device number for the ctrl
1224         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1225
1226         while (num_of_slots) {
1227                 dbg("num_of_slots: %d\n", num_of_slots);
1228                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1229                 if (!func)
1230                         break;
1231
1232                 hp_slot = func->device - ctrl->slot_device_offset;
1233                 dbg("hp_slot: %d\n", hp_slot);
1234
1235                 // We have to save the presence info for these slots
1236                 temp_word = ctrl->ctrl_int_comp >> 16;
1237                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1238                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1239
1240                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1241                         func->switch_save = 0;
1242                 } else {
1243                         func->switch_save = 0x10;
1244                 }
1245
1246                 if (!power_mode) {
1247                         if (!func->is_a_board) {
1248                                 green_LED_off(ctrl, hp_slot);
1249                                 slot_disable(ctrl, hp_slot);
1250                         }
1251                 }
1252
1253                 device++;
1254                 num_of_slots--;
1255         }
1256
1257         if (!power_mode) {
1258                 set_SOGO(ctrl);
1259                 // Wait for SOBS to be unset
1260                 wait_for_ctrl_irq(ctrl);
1261         }
1262
1263         rc = init_SERR(ctrl);
1264         if (rc) {
1265                 err("init_SERR failed\n");
1266                 mutex_unlock(&ctrl->crit_sect);
1267                 goto err_free_irq;
1268         }
1269
1270         // Done with exclusive hardware access
1271         mutex_unlock(&ctrl->crit_sect);
1272
1273         cpqhp_create_debugfs_files(ctrl);
1274
1275         return 0;
1276
1277 err_free_irq:
1278         free_irq(ctrl->interrupt, ctrl);
1279 err_iounmap:
1280         iounmap(ctrl->hpc_reg);
1281 err_free_mem_region:
1282         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1283 err_free_bus:
1284         kfree(ctrl->pci_bus);
1285 err_free_ctrl:
1286         kfree(ctrl);
1287 err_disable_device:
1288         pci_disable_device(pdev);
1289         return rc;
1290 }
1291
1292
1293 static int one_time_init(void)
1294 {
1295         int loop;
1296         int retval = 0;
1297
1298         if (initialized)
1299                 return 0;
1300
1301         power_mode = 0;
1302
1303         retval = pci_print_IRQ_route();
1304         if (retval)
1305                 goto error;
1306
1307         dbg("Initialize + Start the notification mechanism \n");
1308
1309         retval = cpqhp_event_start_thread();
1310         if (retval)
1311                 goto error;
1312
1313         dbg("Initialize slot lists\n");
1314         for (loop = 0; loop < 256; loop++) {
1315                 cpqhp_slot_list[loop] = NULL;
1316         }
1317
1318         // FIXME: We also need to hook the NMI handler eventually.
1319         // this also needs to be worked with Christoph
1320         // register_NMI_handler();
1321
1322         // Map rom address
1323         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1324         if (!cpqhp_rom_start) {
1325                 err ("Could not ioremap memory region for ROM\n");
1326                 retval = -EIO;
1327                 goto error;
1328         }
1329
1330         /* Now, map the int15 entry point if we are on compaq specific hardware */
1331         compaq_nvram_init(cpqhp_rom_start);
1332
1333         /* Map smbios table entry point structure */
1334         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1335                                         cpqhp_rom_start + ROM_PHY_LEN);
1336         if (!smbios_table) {
1337                 err ("Could not find the SMBIOS pointer in memory\n");
1338                 retval = -EIO;
1339                 goto error_rom_start;
1340         }
1341
1342         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1343                                         readw(smbios_table + ST_LENGTH));
1344         if (!smbios_start) {
1345                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1346                 retval = -EIO;
1347                 goto error_smbios_start;
1348         }
1349
1350         initialized = 1;
1351
1352         return retval;
1353
1354 error_smbios_start:
1355         iounmap(smbios_start);
1356 error_rom_start:
1357         iounmap(cpqhp_rom_start);
1358 error:
1359         return retval;
1360 }
1361
1362
1363 static void __exit unload_cpqphpd(void)
1364 {
1365         struct pci_func *next;
1366         struct pci_func *TempSlot;
1367         int loop;
1368         u32 rc;
1369         struct controller *ctrl;
1370         struct controller *tctrl;
1371         struct pci_resource *res;
1372         struct pci_resource *tres;
1373
1374         rc = compaq_nvram_store(cpqhp_rom_start);
1375
1376         ctrl = cpqhp_ctrl_list;
1377
1378         while (ctrl) {
1379                 if (ctrl->hpc_reg) {
1380                         u16 misc;
1381                         rc = read_slot_enable (ctrl);
1382
1383                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1384                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1385
1386                         misc = readw(ctrl->hpc_reg + MISC);
1387                         misc &= 0xFFFD;
1388                         writew(misc, ctrl->hpc_reg + MISC);
1389                 }
1390
1391                 ctrl_slot_cleanup(ctrl);
1392
1393                 res = ctrl->io_head;
1394                 while (res) {
1395                         tres = res;
1396                         res = res->next;
1397                         kfree(tres);
1398                 }
1399
1400                 res = ctrl->mem_head;
1401                 while (res) {
1402                         tres = res;
1403                         res = res->next;
1404                         kfree(tres);
1405                 }
1406
1407                 res = ctrl->p_mem_head;
1408                 while (res) {
1409                         tres = res;
1410                         res = res->next;
1411                         kfree(tres);
1412                 }
1413
1414                 res = ctrl->bus_head;
1415                 while (res) {
1416                         tres = res;
1417                         res = res->next;
1418                         kfree(tres);
1419                 }
1420
1421                 kfree (ctrl->pci_bus);
1422
1423                 tctrl = ctrl;
1424                 ctrl = ctrl->next;
1425                 kfree(tctrl);
1426         }
1427
1428         for (loop = 0; loop < 256; loop++) {
1429                 next = cpqhp_slot_list[loop];
1430                 while (next != NULL) {
1431                         res = next->io_head;
1432                         while (res) {
1433                                 tres = res;
1434                                 res = res->next;
1435                                 kfree(tres);
1436                         }
1437
1438                         res = next->mem_head;
1439                         while (res) {
1440                                 tres = res;
1441                                 res = res->next;
1442                                 kfree(tres);
1443                         }
1444
1445                         res = next->p_mem_head;
1446                         while (res) {
1447                                 tres = res;
1448                                 res = res->next;
1449                                 kfree(tres);
1450                         }
1451
1452                         res = next->bus_head;
1453                         while (res) {
1454                                 tres = res;
1455                                 res = res->next;
1456                                 kfree(tres);
1457                         }
1458
1459                         TempSlot = next;
1460                         next = next->next;
1461                         kfree(TempSlot);
1462                 }
1463         }
1464
1465         // Stop the notification mechanism
1466         if (initialized)
1467                 cpqhp_event_stop_thread();
1468
1469         //unmap the rom address
1470         if (cpqhp_rom_start)
1471                 iounmap(cpqhp_rom_start);
1472         if (smbios_start)
1473                 iounmap(smbios_start);
1474 }
1475
1476
1477
1478 static struct pci_device_id hpcd_pci_tbl[] = {
1479         {
1480         /* handle any PCI Hotplug controller */
1481         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1482         .class_mask =   ~0,
1483
1484         /* no matter who makes it */
1485         .vendor =       PCI_ANY_ID,
1486         .device =       PCI_ANY_ID,
1487         .subvendor =    PCI_ANY_ID,
1488         .subdevice =    PCI_ANY_ID,
1489
1490         }, { /* end: all zeroes */ }
1491 };
1492
1493 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1494
1495
1496
1497 static struct pci_driver cpqhpc_driver = {
1498         .name =         "compaq_pci_hotplug",
1499         .id_table =     hpcd_pci_tbl,
1500         .probe =        cpqhpc_probe,
1501         /* remove:      cpqhpc_remove_one, */
1502 };
1503
1504
1505
1506 static int __init cpqhpc_init(void)
1507 {
1508         int result;
1509
1510         cpqhp_debug = debug;
1511
1512         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1513         cpqhp_initialize_debugfs();
1514         result = pci_register_driver(&cpqhpc_driver);
1515         dbg("pci_register_driver = %d\n", result);
1516         return result;
1517 }
1518
1519
1520 static void __exit cpqhpc_cleanup(void)
1521 {
1522         dbg("unload_cpqphpd()\n");
1523         unload_cpqphpd();
1524
1525         dbg("pci_unregister_driver\n");
1526         pci_unregister_driver(&cpqhpc_driver);
1527         cpqhp_shutdown_debugfs();
1528 }
1529
1530
1531 module_init(cpqhpc_init);
1532 module_exit(cpqhpc_cleanup);
1533
1534