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", __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_CLASS_REVISION, &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  * @ctrl: struct controller to use
 585  * @func: PCI device/function info
 586  * @status: LED control flag: 1 = LED on, 0 = LED off
 587  */
 588 static int
 589 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 590                                 u32 status)
 591 {
 592         u8 hp_slot;
 593
 594         if (func == NULL)
 595                 return(1);
 596
 597         hp_slot = func->device - ctrl->slot_device_offset;
 598
 599         // Wait for exclusive access to hardware
 600         mutex_lock(&ctrl->crit_sect);
 601
 602         if (status == 1) {
 603                 amber_LED_on (ctrl, hp_slot);
 604         } else if (status == 0) {
 605                 amber_LED_off (ctrl, hp_slot);
 606         } else {
 607                 // Done with exclusive hardware access
 608                 mutex_unlock(&ctrl->crit_sect);
 609                 return(1);
 610         }
 611
 612         set_SOGO(ctrl);
 613
 614         // Wait for SOBS to be unset
 615         wait_for_ctrl_irq (ctrl);
 616
 617         // Done with exclusive hardware access
 618         mutex_unlock(&ctrl->crit_sect);
 619
 620         return(0);
 621 }
 622
 623
 624 /**
 625  * set_attention_status - Turns the Amber LED for a slot on or off
 626  * @hotplug_slot: slot to change LED on
 627  * @status: LED control flag
 628  */
 629 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 630 {
 631         struct pci_func *slot_func;
 632         struct slot *slot = hotplug_slot->private;
 633         struct controller *ctrl = slot->ctrl;
 634         u8 bus;
 635         u8 devfn;
 636         u8 device;
 637         u8 function;
 638
 639         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 640
 641         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 642                 return -ENODEV;
 643
 644         device = devfn >> 3;
 645         function = devfn & 0x7;
 646         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 647
 648         slot_func = cpqhp_slot_find(bus, device, function);
 649         if (!slot_func)
 650                 return -ENODEV;
 651
 652         return cpqhp_set_attention_status(ctrl, slot_func, status);
 653 }
 654
 655
 656 static int process_SI(struct hotplug_slot *hotplug_slot)
 657 {
 658         struct pci_func *slot_func;
 659         struct slot *slot = hotplug_slot->private;
 660         struct controller *ctrl = slot->ctrl;
 661         u8 bus;
 662         u8 devfn;
 663         u8 device;
 664         u8 function;
 665
 666         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 667
 668         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 669                 return -ENODEV;
 670
 671         device = devfn >> 3;
 672         function = devfn & 0x7;
 673         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 674
 675         slot_func = cpqhp_slot_find(bus, device, function);
 676         if (!slot_func)
 677                 return -ENODEV;
 678
 679         slot_func->bus = bus;
 680         slot_func->device = device;
 681         slot_func->function = function;
 682         slot_func->configured = 0;
 683         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 684         return cpqhp_process_SI(ctrl, slot_func);
 685 }
 686
 687
 688 static int process_SS(struct hotplug_slot *hotplug_slot)
 689 {
 690         struct pci_func *slot_func;
 691         struct slot *slot = hotplug_slot->private;
 692         struct controller *ctrl = slot->ctrl;
 693         u8 bus;
 694         u8 devfn;
 695         u8 device;
 696         u8 function;
 697
 698         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 699
 700         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 701                 return -ENODEV;
 702
 703         device = devfn >> 3;
 704         function = devfn & 0x7;
 705         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 706
 707         slot_func = cpqhp_slot_find(bus, device, function);
 708         if (!slot_func)
 709                 return -ENODEV;
 710
 711         dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
 712         return cpqhp_process_SS(ctrl, slot_func);
 713 }
 714
 715
 716 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 717 {
 718         struct slot *slot = hotplug_slot->private;
 719         struct controller *ctrl = slot->ctrl;
 720
 721         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 722
 723         return cpqhp_hardware_test(ctrl, value);
 724 }
 725
 726
 727 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 728 {
 729         struct slot *slot = hotplug_slot->private;
 730         struct controller *ctrl = slot->ctrl;
 731
 732         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 733
 734         *value = get_slot_enabled(ctrl, slot);
 735         return 0;
 736 }
 737
 738 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 739 {
 740         struct slot *slot = hotplug_slot->private;
 741         struct controller *ctrl = slot->ctrl;
 742
 743         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 744
 745         *value = cpq_get_attention_status(ctrl, slot);
 746         return 0;
 747 }
 748
 749 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 750 {
 751         struct slot *slot = hotplug_slot->private;
 752         struct controller *ctrl = slot->ctrl;
 753
 754         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 755
 756         *value = cpq_get_latch_status(ctrl, slot);
 757
 758         return 0;
 759 }
 760
 761 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 762 {
 763         struct slot *slot = hotplug_slot->private;
 764         struct controller *ctrl = slot->ctrl;
 765
 766         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 767
 768         *value = get_presence_status(ctrl, slot);
 769
 770         return 0;
 771 }
 772
 773 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 774 {
 775         struct slot *slot = hotplug_slot->private;
 776         struct controller *ctrl = slot->ctrl;
 777
 778         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 779
 780         *value = ctrl->speed_capability;
 781
 782         return 0;
 783 }
 784
 785 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 786 {
 787         struct slot *slot = hotplug_slot->private;
 788         struct controller *ctrl = slot->ctrl;
 789
 790         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 791
 792         *value = ctrl->speed;
 793
 794         return 0;
 795 }
 796
 797 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 798 {
 799         u8 num_of_slots = 0;
 800         u8 hp_slot = 0;
 801         u8 device;
 802         u8 bus_cap;
 803         u16 temp_word;
 804         u16 vendor_id;
 805         u16 subsystem_vid;
 806         u16 subsystem_deviceid;
 807         u32 rc;
 808         struct controller *ctrl;
 809         struct pci_func *func;
 810         int err;
 811
 812         err = pci_enable_device(pdev);
 813         if (err) {
 814                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 815                         pci_name(pdev), err);
 816                 return err;
 817         }
 818
 819         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
 820         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
 821         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
 822                 err(msg_HPC_non_compaq_or_intel);
 823                 rc = -ENODEV;
 824                 goto err_disable_device;
 825         }
 826         dbg("Vendor ID: %x\n", vendor_id);
 827
 828         dbg("revision: %d\n", pdev->revision);
 829         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 830                 err(msg_HPC_rev_error);
 831                 rc = -ENODEV;
 832                 goto err_disable_device;
 833         }
 834
 835         /* Check for the proper subsytem ID's
 836          * Intel uses a different SSID programming model than Compaq.
 837          * For Intel, each SSID bit identifies a PHP capability.
 838          * Also Intel HPC's may have RID=0.
 839          */
 840         if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 841                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
 842                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 843                 if (rc) {
 844                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 845                         goto err_disable_device;
 846                 }
 847                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 848                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 849                         err(msg_HPC_non_compaq_or_intel);
 850                         rc = -ENODEV;
 851                         goto err_disable_device;
 852                 }
 853
 854                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 855                 if (!ctrl) {
 856                         err("%s : out of memory\n", __FUNCTION__);
 857                         rc = -ENOMEM;
 858                         goto err_disable_device;
 859                 }
 860
 861                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 862                 if (rc) {
 863                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 864                         goto err_free_ctrl;
 865                 }
 866
 867                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 868
 869                 /* Set Vendor ID, so it can be accessed later from other functions */
 870                 ctrl->vendor_id = vendor_id;
 871
 872                 switch (subsystem_vid) {
 873                         case PCI_VENDOR_ID_COMPAQ:
 874                                 if (pdev->revision >= 0x13) { /* CIOBX */
 875                                         ctrl->push_flag = 1;
 876                                         ctrl->slot_switch_type = 1;
 877                                         ctrl->push_button = 1;
 878                                         ctrl->pci_config_space = 1;
 879                                         ctrl->defeature_PHP = 1;
 880                                         ctrl->pcix_support = 1;
 881                                         ctrl->pcix_speed_capability = 1;
 882                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 883                                         if (bus_cap & 0x80) {
 884                                                 dbg("bus max supports 133MHz PCI-X\n");
 885                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 886                                                 break;
 887                                         }
 888                                         if (bus_cap & 0x40) {
 889                                                 dbg("bus max supports 100MHz PCI-X\n");
 890                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 891                                                 break;
 892                                         }
 893                                         if (bus_cap & 20) {
 894                                                 dbg("bus max supports 66MHz PCI-X\n");
 895                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 896                                                 break;
 897                                         }
 898                                         if (bus_cap & 10) {
 899                                                 dbg("bus max supports 66MHz PCI\n");
 900                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 901                                                 break;
 902                                         }
 903
 904                                         break;
 905                                 }
 906
 907                                 switch (subsystem_deviceid) {
 908                                         case PCI_SUB_HPC_ID:
 909                                                 /* Original 6500/7000 implementation */
 910                                                 ctrl->slot_switch_type = 1;
 911                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 912                                                 ctrl->push_button = 0;
 913                                                 ctrl->pci_config_space = 1;
 914                                                 ctrl->defeature_PHP = 1;
 915                                                 ctrl->pcix_support = 0;
 916                                                 ctrl->pcix_speed_capability = 0;
 917                                                 break;
 918                                         case PCI_SUB_HPC_ID2:
 919                                                 /* First Pushbutton implementation */
 920                                                 ctrl->push_flag = 1;
 921                                                 ctrl->slot_switch_type = 1;
 922                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 923                                                 ctrl->push_button = 1;
 924                                                 ctrl->pci_config_space = 1;
 925                                                 ctrl->defeature_PHP = 1;
 926                                                 ctrl->pcix_support = 0;
 927                                                 ctrl->pcix_speed_capability = 0;
 928                                                 break;
 929                                         case PCI_SUB_HPC_ID_INTC:
 930                                                 /* Third party (6500/7000) */
 931                                                 ctrl->slot_switch_type = 1;
 932                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 933                                                 ctrl->push_button = 0;
 934                                                 ctrl->pci_config_space = 1;
 935                                                 ctrl->defeature_PHP = 1;
 936                                                 ctrl->pcix_support = 0;
 937                                                 ctrl->pcix_speed_capability = 0;
 938                                                 break;
 939                                         case PCI_SUB_HPC_ID3:
 940                                                 /* First 66 Mhz implementation */
 941                                                 ctrl->push_flag = 1;
 942                                                 ctrl->slot_switch_type = 1;
 943                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 944                                                 ctrl->push_button = 1;
 945                                                 ctrl->pci_config_space = 1;
 946                                                 ctrl->defeature_PHP = 1;
 947                                                 ctrl->pcix_support = 0;
 948                                                 ctrl->pcix_speed_capability = 0;
 949                                                 break;
 950                                         case PCI_SUB_HPC_ID4:
 951                                                 /* First PCI-X implementation, 100MHz */
 952                                                 ctrl->push_flag = 1;
 953                                                 ctrl->slot_switch_type = 1;
 954                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 955                                                 ctrl->push_button = 1;
 956                                                 ctrl->pci_config_space = 1;
 957                                                 ctrl->defeature_PHP = 1;
 958                                                 ctrl->pcix_support = 1;
 959                                                 ctrl->pcix_speed_capability = 0;
 960                                                 break;
 961                                         default:
 962                                                 err(msg_HPC_not_supported);
 963                                                 rc = -ENODEV;
 964                                                 goto err_free_ctrl;
 965                                 }
 966                                 break;
 967
 968                         case PCI_VENDOR_ID_INTEL:
 969                                 /* Check for speed capability (0=33, 1=66) */
 970                                 if (subsystem_deviceid & 0x0001) {
 971                                         ctrl->speed_capability = PCI_SPEED_66MHz;
 972                                 } else {
 973                                         ctrl->speed_capability = PCI_SPEED_33MHz;
 974                                 }
 975
 976                                 /* Check for push button */
 977                                 if (subsystem_deviceid & 0x0002) {
 978                                         /* no push button */
 979                                         ctrl->push_button = 0;
 980                                 } else {
 981                                         /* push button supported */
 982                                         ctrl->push_button = 1;
 983                                 }
 984
 985                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
 986                                 if (subsystem_deviceid & 0x0004) {
 987                                         /* no switch */
 988                                         ctrl->slot_switch_type = 0;
 989                                 } else {
 990                                         /* switch */
 991                                         ctrl->slot_switch_type = 1;
 992                                 }
 993
 994                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
 995                                 if (subsystem_deviceid & 0x0008) {
 996                                         ctrl->defeature_PHP = 1;        // PHP supported
 997                                 } else {
 998                                         ctrl->defeature_PHP = 0;        // PHP not supported
 999                                 }
1000
1001                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1002                                 if (subsystem_deviceid & 0x0010) {
1003                                         ctrl->alternate_base_address = 1;       // supported
1004                                 } else {
1005                                         ctrl->alternate_base_address = 0;       // not supported
1006                                 }
1007
1008                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1009                                 if (subsystem_deviceid & 0x0020) {
1010                                         ctrl->pci_config_space = 1;             // supported
1011                                 } else {
1012                                         ctrl->pci_config_space = 0;             // not supported
1013                                 }
1014
1015                                 /* PCI-X support */
1016                                 if (subsystem_deviceid & 0x0080) {
1017                                         /* PCI-X capable */
1018                                         ctrl->pcix_support = 1;
1019                                         /* Frequency of operation in PCI-X mode */
1020                                         if (subsystem_deviceid & 0x0040) {
1021                                                 /* 133MHz PCI-X if bit 7 is 1 */
1022                                                 ctrl->pcix_speed_capability = 1;
1023                                         } else {
1024                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1025                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1026                                                 ctrl->pcix_speed_capability = 0;
1027                                         }
1028                                 } else {
1029                                         /* Conventional PCI */
1030                                         ctrl->pcix_support = 0;
1031                                         ctrl->pcix_speed_capability = 0;
1032                                 }
1033                                 break;
1034
1035                         default:
1036                                 err(msg_HPC_not_supported);
1037                                 rc = -ENODEV;
1038                                 goto err_free_ctrl;
1039                 }
1040
1041         } else {
1042                 err(msg_HPC_not_supported);
1043                 return -ENODEV;
1044         }
1045
1046         // Tell the user that we found one.
1047         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1048                                         pdev->bus->number);
1049
1050         dbg("Hotplug controller capabilities:\n");
1051         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1052         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1053                                         "switch present" : "no switch");
1054         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1055                                         "PHP supported" : "PHP not supported");
1056         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1057                                         "supported" : "not supported");
1058         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1059                                         "supported" : "not supported");
1060         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1061                                         "supported" : "not supported");
1062         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1063                                         "supported" : "not supported");
1064
1065         ctrl->pci_dev = pdev;
1066         pci_set_drvdata(pdev, ctrl);
1067
1068         /* make our own copy of the pci bus structure,
1069          * as we like tweaking it a lot */
1070         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1071         if (!ctrl->pci_bus) {
1072                 err("out of memory\n");
1073                 rc = -ENOMEM;
1074                 goto err_free_ctrl;
1075         }
1076         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1077
1078         ctrl->bus = pdev->bus->number;
1079         ctrl->rev = pdev->revision;
1080         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1081                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1082
1083         mutex_init(&ctrl->crit_sect);
1084         init_waitqueue_head(&ctrl->queue);
1085
1086         /* initialize our threads if they haven't already been started up */
1087         rc = one_time_init();
1088         if (rc) {
1089                 goto err_free_bus;
1090         }
1091
1092         dbg("pdev = %p\n", pdev);
1093         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1094         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1095
1096         if (!request_mem_region(pci_resource_start(pdev, 0),
1097                                 pci_resource_len(pdev, 0), MY_NAME)) {
1098                 err("cannot reserve MMIO region\n");
1099                 rc = -ENOMEM;
1100                 goto err_free_bus;
1101         }
1102
1103         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1104                                         pci_resource_len(pdev, 0));
1105         if (!ctrl->hpc_reg) {
1106                 err("cannot remap MMIO region %llx @ %llx\n",
1107                     (unsigned long long)pci_resource_len(pdev, 0),
1108                     (unsigned long long)pci_resource_start(pdev, 0));
1109                 rc = -ENODEV;
1110                 goto err_free_mem_region;
1111         }
1112
1113         // Check for 66Mhz operation
1114         ctrl->speed = get_controller_speed(ctrl);
1115
1116
1117         /********************************************************
1118          *
1119          *              Save configuration headers for this and
1120          *              subordinate PCI buses
1121          *
1122          ********************************************************/
1123
1124         // find the physical slot number of the first hot plug slot
1125
1126         /* Get slot won't work for devices behind bridges, but
1127          * in this case it will always be called for the "base"
1128          * bus/dev/func of a slot.
1129          * CS: this is leveraging the PCIIRQ routing code from the kernel
1130          * (pci-pc.c: get_irq_routing_table) */
1131         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1132                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1133                                 &(ctrl->first_slot));
1134         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1135                                 ctrl->first_slot, rc);
1136         if (rc) {
1137                 err(msg_initialization_err, rc);
1138                 goto err_iounmap;
1139         }
1140
1141         // Store PCI Config Space for all devices on this bus
1142         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1143         if (rc) {
1144                 err("%s: unable to save PCI configuration data, error %d\n",
1145                                 __FUNCTION__, rc);
1146                 goto err_iounmap;
1147         }
1148
1149         /*
1150          * Get IO, memory, and IRQ resources for new devices
1151          */
1152         // The next line is required for cpqhp_find_available_resources
1153         ctrl->interrupt = pdev->irq;
1154         if (ctrl->interrupt < 0x10) {
1155                 cpqhp_legacy_mode = 1;
1156                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1157         }
1158
1159         ctrl->cfgspc_irq = 0;
1160         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1161
1162         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1163         ctrl->add_support = !rc;
1164         if (rc) {
1165                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1166                 err("unable to locate PCI configuration resources for hot plug add.\n");
1167                 goto err_iounmap;
1168         }
1169
1170         /*
1171          * Finish setting up the hot plug ctrl device
1172          */
1173         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1174         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1175
1176         ctrl->next_event = 0;
1177
1178         /* Setup the slot information structures */
1179         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1180         if (rc) {
1181                 err(msg_initialization_err, 6);
1182                 err("%s: unable to save PCI configuration data, error %d\n",
1183                         __FUNCTION__, rc);
1184                 goto err_iounmap;
1185         }
1186
1187         /* Mask all general input interrupts */
1188         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1189
1190         /* set up the interrupt */
1191         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1192         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1193                         IRQF_SHARED, MY_NAME, ctrl)) {
1194                 err("Can't get irq %d for the hotplug pci controller\n",
1195                         ctrl->interrupt);
1196                 rc = -ENODEV;
1197                 goto err_iounmap;
1198         }
1199
1200         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1201         temp_word = readw(ctrl->hpc_reg + MISC);
1202         temp_word |= 0x4006;
1203         writew(temp_word, ctrl->hpc_reg + MISC);
1204
1205         // Changed 05/05/97 to clear all interrupts at start
1206         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1207
1208         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1209
1210         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1211
1212         if (!cpqhp_ctrl_list) {
1213                 cpqhp_ctrl_list = ctrl;
1214                 ctrl->next = NULL;
1215         } else {
1216                 ctrl->next = cpqhp_ctrl_list;
1217                 cpqhp_ctrl_list = ctrl;
1218         }
1219
1220         // turn off empty slots here unless command line option "ON" set
1221         // Wait for exclusive access to hardware
1222         mutex_lock(&ctrl->crit_sect);
1223
1224         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1225
1226         // find first device number for the ctrl
1227         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1228
1229         while (num_of_slots) {
1230                 dbg("num_of_slots: %d\n", num_of_slots);
1231                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1232                 if (!func)
1233                         break;
1234
1235                 hp_slot = func->device - ctrl->slot_device_offset;
1236                 dbg("hp_slot: %d\n", hp_slot);
1237
1238                 // We have to save the presence info for these slots
1239                 temp_word = ctrl->ctrl_int_comp >> 16;
1240                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1241                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1242
1243                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1244                         func->switch_save = 0;
1245                 } else {
1246                         func->switch_save = 0x10;
1247                 }
1248
1249                 if (!power_mode) {
1250                         if (!func->is_a_board) {
1251                                 green_LED_off(ctrl, hp_slot);
1252                                 slot_disable(ctrl, hp_slot);
1253                         }
1254                 }
1255
1256                 device++;
1257                 num_of_slots--;
1258         }
1259
1260         if (!power_mode) {
1261                 set_SOGO(ctrl);
1262                 // Wait for SOBS to be unset
1263                 wait_for_ctrl_irq(ctrl);
1264         }
1265
1266         rc = init_SERR(ctrl);
1267         if (rc) {
1268                 err("init_SERR failed\n");
1269                 mutex_unlock(&ctrl->crit_sect);
1270                 goto err_free_irq;
1271         }
1272
1273         // Done with exclusive hardware access
1274         mutex_unlock(&ctrl->crit_sect);
1275
1276         cpqhp_create_debugfs_files(ctrl);
1277
1278         return 0;
1279
1280 err_free_irq:
1281         free_irq(ctrl->interrupt, ctrl);
1282 err_iounmap:
1283         iounmap(ctrl->hpc_reg);
1284 err_free_mem_region:
1285         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1286 err_free_bus:
1287         kfree(ctrl->pci_bus);
1288 err_free_ctrl:
1289         kfree(ctrl);
1290 err_disable_device:
1291         pci_disable_device(pdev);
1292         return rc;
1293 }
1294
1295
1296 static int one_time_init(void)
1297 {
1298         int loop;
1299         int retval = 0;
1300
1301         if (initialized)
1302                 return 0;
1303
1304         power_mode = 0;
1305
1306         retval = pci_print_IRQ_route();
1307         if (retval)
1308                 goto error;
1309
1310         dbg("Initialize + Start the notification mechanism \n");
1311
1312         retval = cpqhp_event_start_thread();
1313         if (retval)
1314                 goto error;
1315
1316         dbg("Initialize slot lists\n");
1317         for (loop = 0; loop < 256; loop++) {
1318                 cpqhp_slot_list[loop] = NULL;
1319         }
1320
1321         // FIXME: We also need to hook the NMI handler eventually.
1322         // this also needs to be worked with Christoph
1323         // register_NMI_handler();
1324
1325         // Map rom address
1326         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1327         if (!cpqhp_rom_start) {
1328                 err ("Could not ioremap memory region for ROM\n");
1329                 retval = -EIO;
1330                 goto error;
1331         }
1332
1333         /* Now, map the int15 entry point if we are on compaq specific hardware */
1334         compaq_nvram_init(cpqhp_rom_start);
1335
1336         /* Map smbios table entry point structure */
1337         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1338                                         cpqhp_rom_start + ROM_PHY_LEN);
1339         if (!smbios_table) {
1340                 err ("Could not find the SMBIOS pointer in memory\n");
1341                 retval = -EIO;
1342                 goto error_rom_start;
1343         }
1344
1345         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1346                                         readw(smbios_table + ST_LENGTH));
1347         if (!smbios_start) {
1348                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1349                 retval = -EIO;
1350                 goto error_smbios_start;
1351         }
1352
1353         initialized = 1;
1354
1355         return retval;
1356
1357 error_smbios_start:
1358         iounmap(smbios_start);
1359 error_rom_start:
1360         iounmap(cpqhp_rom_start);
1361 error:
1362         return retval;
1363 }
1364
1365
1366 static void __exit unload_cpqphpd(void)
1367 {
1368         struct pci_func *next;
1369         struct pci_func *TempSlot;
1370         int loop;
1371         u32 rc;
1372         struct controller *ctrl;
1373         struct controller *tctrl;
1374         struct pci_resource *res;
1375         struct pci_resource *tres;
1376
1377         rc = compaq_nvram_store(cpqhp_rom_start);
1378
1379         ctrl = cpqhp_ctrl_list;
1380
1381         while (ctrl) {
1382                 if (ctrl->hpc_reg) {
1383                         u16 misc;
1384                         rc = read_slot_enable (ctrl);
1385
1386                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1387                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1388
1389                         misc = readw(ctrl->hpc_reg + MISC);
1390                         misc &= 0xFFFD;
1391                         writew(misc, ctrl->hpc_reg + MISC);
1392                 }
1393
1394                 ctrl_slot_cleanup(ctrl);
1395
1396                 res = ctrl->io_head;
1397                 while (res) {
1398                         tres = res;
1399                         res = res->next;
1400                         kfree(tres);
1401                 }
1402
1403                 res = ctrl->mem_head;
1404                 while (res) {
1405                         tres = res;
1406                         res = res->next;
1407                         kfree(tres);
1408                 }
1409
1410                 res = ctrl->p_mem_head;
1411                 while (res) {
1412                         tres = res;
1413                         res = res->next;
1414                         kfree(tres);
1415                 }
1416
1417                 res = ctrl->bus_head;
1418                 while (res) {
1419                         tres = res;
1420                         res = res->next;
1421                         kfree(tres);
1422                 }
1423
1424                 kfree (ctrl->pci_bus);
1425
1426                 tctrl = ctrl;
1427                 ctrl = ctrl->next;
1428                 kfree(tctrl);
1429         }
1430
1431         for (loop = 0; loop < 256; loop++) {
1432                 next = cpqhp_slot_list[loop];
1433                 while (next != NULL) {
1434                         res = next->io_head;
1435                         while (res) {
1436                                 tres = res;
1437                                 res = res->next;
1438                                 kfree(tres);
1439                         }
1440
1441                         res = next->mem_head;
1442                         while (res) {
1443                                 tres = res;
1444                                 res = res->next;
1445                                 kfree(tres);
1446                         }
1447
1448                         res = next->p_mem_head;
1449                         while (res) {
1450                                 tres = res;
1451                                 res = res->next;
1452                                 kfree(tres);
1453                         }
1454
1455                         res = next->bus_head;
1456                         while (res) {
1457                                 tres = res;
1458                                 res = res->next;
1459                                 kfree(tres);
1460                         }
1461
1462                         TempSlot = next;
1463                         next = next->next;
1464                         kfree(TempSlot);
1465                 }
1466         }
1467
1468         // Stop the notification mechanism
1469         if (initialized)
1470                 cpqhp_event_stop_thread();
1471
1472         //unmap the rom address
1473         if (cpqhp_rom_start)
1474                 iounmap(cpqhp_rom_start);
1475         if (smbios_start)
1476                 iounmap(smbios_start);
1477 }
1478
1479
1480
1481 static struct pci_device_id hpcd_pci_tbl[] = {
1482         {
1483         /* handle any PCI Hotplug controller */
1484         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1485         .class_mask =   ~0,
1486
1487         /* no matter who makes it */
1488         .vendor =       PCI_ANY_ID,
1489         .device =       PCI_ANY_ID,
1490         .subvendor =    PCI_ANY_ID,
1491         .subdevice =    PCI_ANY_ID,
1492
1493         }, { /* end: all zeroes */ }
1494 };
1495
1496 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1497
1498
1499
1500 static struct pci_driver cpqhpc_driver = {
1501         .name =         "compaq_pci_hotplug",
1502         .id_table =     hpcd_pci_tbl,
1503         .probe =        cpqhpc_probe,
1504         /* remove:      cpqhpc_remove_one, */
1505 };
1506
1507
1508
1509 static int __init cpqhpc_init(void)
1510 {
1511         int result;
1512
1513         cpqhp_debug = debug;
1514
1515         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1516         cpqhp_initialize_debugfs();
1517         result = pci_register_driver(&cpqhpc_driver);
1518         dbg("pci_register_driver = %d\n", result);
1519         return result;
1520 }
1521
1522
1523 static void __exit cpqhpc_cleanup(void)
1524 {
1525         dbg("unload_cpqphpd()\n");
1526         unload_cpqphpd();
1527
1528         dbg("pci_unregister_driver\n");
1529         pci_unregister_driver(&cpqhpc_driver);
1530         cpqhp_shutdown_debugfs();
1531 }
1532
1533
1534 module_init(cpqhpc_init);
1535 module_exit(cpqhpc_cleanup);
1536
1537