git.oblomov.eu Git - linux-2.6/blob - 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 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/kernel.h>
  34 #include <linux/types.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/slab.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/pci.h>
  39 #include <linux/pci_hotplug.h>
  40 #include <linux/init.h>
  41 #include <linux/interrupt.h>
  42
  43 #include <asm/uaccess.h>
  44
  45 #include "cpqphp.h"
  46 #include "cpqphp_nvram.h"
  47 #include <asm/pci_x86.h>
  48
  49
  50 /* Global variables */
  51 int cpqhp_debug;
  52 int cpqhp_legacy_mode;
  53 struct controller *cpqhp_ctrl_list;     /* = NULL */
  54 struct pci_func *cpqhp_slot_list[256];
  55
  56 /* local variables */
  57 static void __iomem *smbios_table;
  58 static void __iomem *smbios_start;
  59 static void __iomem *cpqhp_rom_start;
  60 static int power_mode;
  61 static int debug;
  62 static int initialized;
  63
  64 #define DRIVER_VERSION  "0.9.8"
  65 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
  66 #define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
  67
  68 MODULE_AUTHOR(DRIVER_AUTHOR);
  69 MODULE_DESCRIPTION(DRIVER_DESC);
  70 MODULE_LICENSE("GPL");
  71
  72 module_param(power_mode, bool, 0644);
  73 MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
  74
  75 module_param(debug, bool, 0644);
  76 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  77
  78 #define CPQHPC_MODULE_MINOR 208
  79
  80 static inline int is_slot64bit(struct slot *slot)
  81 {
  82         return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
  83 }
  84
  85 static inline int is_slot66mhz(struct slot *slot)
  86 {
  87         return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
  88 }
  89
  90 /**
  91  * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
  92  * @begin: begin pointer for region to be scanned.
  93  * @end: end pointer for region to be scanned.
  94  *
  95  * Returns pointer to the head of the SMBIOS tables (or %NULL).
  96  */
  97 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
  98 {
  99         void __iomem *fp;
 100         void __iomem *endp;
 101         u8 temp1, temp2, temp3, temp4;
 102         int status = 0;
 103
 104         endp = (end - sizeof(u32) + 1);
 105
 106         for (fp = begin; fp <= endp; fp += 16) {
 107                 temp1 = readb(fp);
 108                 temp2 = readb(fp+1);
 109                 temp3 = readb(fp+2);
 110                 temp4 = readb(fp+3);
 111                 if (temp1 == '_' &&
 112                     temp2 == 'S' &&
 113                     temp3 == 'M' &&
 114                     temp4 == '_') {
 115                         status = 1;
 116                         break;
 117                 }
 118         }
 119
 120         if (!status)
 121                 fp = NULL;
 122
 123         dbg("Discovered SMBIOS Entry point at %p\n", fp);
 124
 125         return fp;
 126 }
 127
 128 /**
 129  * init_SERR - Initializes the per slot SERR generation.
 130  * @ctrl: controller to use
 131  *
 132  * For unexpected switch opens
 133  */
 134 static int init_SERR(struct controller * ctrl)
 135 {
 136         u32 tempdword;
 137         u32 number_of_slots;
 138         u8 physical_slot;
 139
 140         if (!ctrl)
 141                 return 1;
 142
 143         tempdword = ctrl->first_slot;
 144
 145         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 146         /* Loop through slots */
 147         while (number_of_slots) {
 148                 physical_slot = tempdword;
 149                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
 150                 tempdword++;
 151                 number_of_slots--;
 152         }
 153
 154         return 0;
 155 }
 156
 157 /* nice debugging output */
 158 static int pci_print_IRQ_route (void)
 159 {
 160         struct irq_routing_table *routing_table;
 161         int len;
 162         int loop;
 163
 164         u8 tbus, tdevice, tslot;
 165
 166         routing_table = pcibios_get_irq_routing_table();
 167         if (routing_table == NULL) {
 168                 err("No BIOS Routing Table??? Not good\n");
 169                 return -ENOMEM;
 170         }
 171
 172         len = (routing_table->size - sizeof(struct irq_routing_table)) /
 173                         sizeof(struct irq_info);
 174         /* Make sure I got at least one entry */
 175         if (len == 0) {
 176                 kfree(routing_table);
 177                 return -1;
 178         }
 179
 180         dbg("bus dev func slot\n");
 181
 182         for (loop = 0; loop < len; ++loop) {
 183                 tbus = routing_table->slots[loop].bus;
 184                 tdevice = routing_table->slots[loop].devfn;
 185                 tslot = routing_table->slots[loop].slot;
 186                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 187
 188         }
 189         kfree(routing_table);
 190         return 0;
 191 }
 192
 193
 194 /**
 195  * get_subsequent_smbios_entry: get the next entry from bios table.
 196  * @smbios_start: where to start in the SMBIOS table
 197  * @smbios_table: location of the SMBIOS table
 198  * @curr: %NULL or pointer to previously returned structure
 199  *
 200  * Gets the first entry if previous == NULL;
 201  * otherwise, returns the next entry.
 202  * Uses global SMBIOS Table pointer.
 203  *
 204  * Returns a pointer to an SMBIOS structure or NULL if none found.
 205  */
 206 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 207                                                 void __iomem *smbios_table,
 208                                                 void __iomem *curr)
 209 {
 210         u8 bail = 0;
 211         u8 previous_byte = 1;
 212         void __iomem *p_temp;
 213         void __iomem *p_max;
 214
 215         if (!smbios_table || !curr)
 216                 return NULL;
 217
 218         /* set p_max to the end of the table */
 219         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 220
 221         p_temp = curr;
 222         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 223
 224         while ((p_temp < p_max) && !bail) {
 225                 /* Look for the double NULL terminator
 226                  * The first condition is the previous byte
 227                  * and the second is the curr
 228                  */
 229                 if (!previous_byte && !(readb(p_temp)))
 230                         bail = 1;
 231
 232                 previous_byte = readb(p_temp);
 233                 p_temp++;
 234         }
 235
 236         if (p_temp < p_max)
 237                 return p_temp;
 238         else
 239                 return NULL;
 240 }
 241
 242
 243 /**
 244  * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
 245  * @smbios_start: where to start in the SMBIOS table
 246  * @smbios_table: location of the SMBIOS table
 247  * @type: SMBIOS structure type to be returned
 248  * @previous: %NULL or pointer to previously returned structure
 249  *
 250  * Gets the first entry of the specified type if previous == %NULL;
 251  * Otherwise, returns the next entry of the given type.
 252  * Uses global SMBIOS Table pointer.
 253  * Uses get_subsequent_smbios_entry.
 254  *
 255  * Returns a pointer to an SMBIOS structure or %NULL if none found.
 256  */
 257 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
 258                                         void __iomem *smbios_table,
 259                                         u8 type,
 260                                         void __iomem *previous)
 261 {
 262         if (!smbios_table)
 263                 return NULL;
 264
 265         if (!previous)
 266                 previous = smbios_start;
 267         else
 268                 previous = get_subsequent_smbios_entry(smbios_start,
 269                                         smbios_table, previous);
 270
 271         while (previous)
 272                 if (readb(previous + SMBIOS_GENERIC_TYPE) != type)
 273                         previous = get_subsequent_smbios_entry(smbios_start,
 274                                                 smbios_table, previous);
 275                 else
 276                         break;
 277
 278         return previous;
 279 }
 280
 281 static void release_slot(struct hotplug_slot *hotplug_slot)
 282 {
 283         struct slot *slot = hotplug_slot->private;
 284
 285         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 286
 287         kfree(slot->hotplug_slot->info);
 288         kfree(slot->hotplug_slot);
 289         kfree(slot);
 290 }
 291
 292 static int ctrl_slot_cleanup (struct controller * ctrl)
 293 {
 294         struct slot *old_slot, *next_slot;
 295
 296         old_slot = ctrl->slot;
 297         ctrl->slot = NULL;
 298
 299         while (old_slot) {
 300                 /* memory will be freed by the release_slot callback */
 301                 next_slot = old_slot->next;
 302                 pci_hp_deregister (old_slot->hotplug_slot);
 303                 old_slot = next_slot;
 304         }
 305
 306         cpqhp_remove_debugfs_files(ctrl);
 307
 308         /* Free IRQ associated with hot plug device */
 309         free_irq(ctrl->interrupt, ctrl);
 310         /* Unmap the memory */
 311         iounmap(ctrl->hpc_reg);
 312         /* Finally reclaim PCI mem */
 313         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 314                            pci_resource_len(ctrl->pci_dev, 0));
 315
 316         return 0;
 317 }
 318
 319
 320 /**
 321  * get_slot_mapping - determine logical slot mapping for PCI device
 322  *
 323  * Won't work for more than one PCI-PCI bridge in a slot.
 324  *
 325  * @bus_num - bus number of PCI device
 326  * @dev_num - device number of PCI device
 327  * @slot - Pointer to u8 where slot number will be returned
 328  *
 329  * Output:      SUCCESS or FAILURE
 330  */
 331 static int
 332 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 333 {
 334         struct irq_routing_table *PCIIRQRoutingInfoLength;
 335         u32 work;
 336         long len;
 337         long loop;
 338
 339         u8 tbus, tdevice, tslot, bridgeSlot;
 340
 341         dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
 342
 343         bridgeSlot = 0xFF;
 344
 345         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 346         if (!PCIIRQRoutingInfoLength)
 347                 return -1;
 348
 349         len = (PCIIRQRoutingInfoLength->size -
 350                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 351         /* Make sure I got at least one entry */
 352         if (len == 0) {
 353                 kfree(PCIIRQRoutingInfoLength);
 354                 return -1;
 355         }
 356
 357         for (loop = 0; loop < len; ++loop) {
 358                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 359                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
 360                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 361
 362                 if ((tbus == bus_num) && (tdevice == dev_num)) {
 363                         *slot = tslot;
 364                         kfree(PCIIRQRoutingInfoLength);
 365                         return 0;
 366                 } else {
 367                         /* Did not get a match on the target PCI device. Check
 368                          * if the current IRQ table entry is a PCI-to-PCI
 369                          * bridge device.  If so, and it's secondary bus
 370                          * matches the bus number for the target device, I need
 371                          * to save the bridge's slot number.  If I can not find
 372                          * an entry for the target device, I will have to
 373                          * assume it's on the other side of the bridge, and
 374                          * assign it the bridge's slot.
 375                          */
 376                         bus->number = tbus;
 377                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 378                                                 PCI_CLASS_REVISION, &work);
 379
 380                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 381                                 pci_bus_read_config_dword(bus,
 382                                                         PCI_DEVFN(tdevice, 0),
 383                                                         PCI_PRIMARY_BUS, &work);
 384                                 // See if bridge's secondary bus matches target bus.
 385                                 if (((work >> 8) & 0x000000FF) == (long) bus_num)
 386                                         bridgeSlot = tslot;
 387                         }
 388                 }
 389
 390         }
 391
 392         /* If we got here, we didn't find an entry in the IRQ mapping table for
 393          * the target PCI device.  If we did determine that the target device
 394          * is on the other side of a PCI-to-PCI bridge, return the slot number
 395          * for the bridge.
 396          */
 397         if (bridgeSlot != 0xFF) {
 398                 *slot = bridgeSlot;
 399                 kfree(PCIIRQRoutingInfoLength);
 400                 return 0;
 401         }
 402         kfree(PCIIRQRoutingInfoLength);
 403         /* Couldn't find an entry in the routing table for this PCI device */
 404         return -1;
 405 }
 406
 407
 408 /**
 409  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 410  * @ctrl: struct controller to use
 411  * @func: PCI device/function info
 412  * @status: LED control flag: 1 = LED on, 0 = LED off
 413  */
 414 static int
 415 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 416                                 u32 status)
 417 {
 418         u8 hp_slot;
 419
 420         if (func == NULL)
 421                 return 1;
 422
 423         hp_slot = func->device - ctrl->slot_device_offset;
 424
 425         /* Wait for exclusive access to hardware */
 426         mutex_lock(&ctrl->crit_sect);
 427
 428         if (status == 1)
 429                 amber_LED_on (ctrl, hp_slot);
 430         else if (status == 0)
 431                 amber_LED_off (ctrl, hp_slot);
 432         else {
 433                 /* Done with exclusive hardware access */
 434                 mutex_unlock(&ctrl->crit_sect);
 435                 return 1;
 436         }
 437
 438         set_SOGO(ctrl);
 439
 440         /* Wait for SOBS to be unset */
 441         wait_for_ctrl_irq (ctrl);
 442
 443         /* Done with exclusive hardware access */
 444         mutex_unlock(&ctrl->crit_sect);
 445
 446         return 0;
 447 }
 448
 449
 450 /**
 451  * set_attention_status - Turns the Amber LED for a slot on or off
 452  * @hotplug_slot: slot to change LED on
 453  * @status: LED control flag
 454  */
 455 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 456 {
 457         struct pci_func *slot_func;
 458         struct slot *slot = hotplug_slot->private;
 459         struct controller *ctrl = slot->ctrl;
 460         u8 bus;
 461         u8 devfn;
 462         u8 device;
 463         u8 function;
 464
 465         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 466
 467         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 468                 return -ENODEV;
 469
 470         device = devfn >> 3;
 471         function = devfn & 0x7;
 472         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 473
 474         slot_func = cpqhp_slot_find(bus, device, function);
 475         if (!slot_func)
 476                 return -ENODEV;
 477
 478         return cpqhp_set_attention_status(ctrl, slot_func, status);
 479 }
 480
 481
 482 static int process_SI(struct hotplug_slot *hotplug_slot)
 483 {
 484         struct pci_func *slot_func;
 485         struct slot *slot = hotplug_slot->private;
 486         struct controller *ctrl = slot->ctrl;
 487         u8 bus;
 488         u8 devfn;
 489         u8 device;
 490         u8 function;
 491
 492         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 493
 494         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 495                 return -ENODEV;
 496
 497         device = devfn >> 3;
 498         function = devfn & 0x7;
 499         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 500
 501         slot_func = cpqhp_slot_find(bus, device, function);
 502         if (!slot_func)
 503                 return -ENODEV;
 504
 505         slot_func->bus = bus;
 506         slot_func->device = device;
 507         slot_func->function = function;
 508         slot_func->configured = 0;
 509         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 510         return cpqhp_process_SI(ctrl, slot_func);
 511 }
 512
 513
 514 static int process_SS(struct hotplug_slot *hotplug_slot)
 515 {
 516         struct pci_func *slot_func;
 517         struct slot *slot = hotplug_slot->private;
 518         struct controller *ctrl = slot->ctrl;
 519         u8 bus;
 520         u8 devfn;
 521         u8 device;
 522         u8 function;
 523
 524         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 525
 526         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 527                 return -ENODEV;
 528
 529         device = devfn >> 3;
 530         function = devfn & 0x7;
 531         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 532
 533         slot_func = cpqhp_slot_find(bus, device, function);
 534         if (!slot_func)
 535                 return -ENODEV;
 536
 537         dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
 538         return cpqhp_process_SS(ctrl, slot_func);
 539 }
 540
 541
 542 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 543 {
 544         struct slot *slot = hotplug_slot->private;
 545         struct controller *ctrl = slot->ctrl;
 546
 547         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 548
 549         return cpqhp_hardware_test(ctrl, value);
 550 }
 551
 552
 553 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 554 {
 555         struct slot *slot = hotplug_slot->private;
 556         struct controller *ctrl = slot->ctrl;
 557
 558         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 559
 560         *value = get_slot_enabled(ctrl, slot);
 561         return 0;
 562 }
 563
 564 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 565 {
 566         struct slot *slot = hotplug_slot->private;
 567         struct controller *ctrl = slot->ctrl;
 568
 569         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 570
 571         *value = cpq_get_attention_status(ctrl, slot);
 572         return 0;
 573 }
 574
 575 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 576 {
 577         struct slot *slot = hotplug_slot->private;
 578         struct controller *ctrl = slot->ctrl;
 579
 580         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 581
 582         *value = cpq_get_latch_status(ctrl, slot);
 583
 584         return 0;
 585 }
 586
 587 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 588 {
 589         struct slot *slot = hotplug_slot->private;
 590         struct controller *ctrl = slot->ctrl;
 591
 592         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 593
 594         *value = get_presence_status(ctrl, slot);
 595
 596         return 0;
 597 }
 598
 599 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 600 {
 601         struct slot *slot = hotplug_slot->private;
 602         struct controller *ctrl = slot->ctrl;
 603
 604         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 605
 606         *value = ctrl->speed_capability;
 607
 608         return 0;
 609 }
 610
 611 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 612 {
 613         struct slot *slot = hotplug_slot->private;
 614         struct controller *ctrl = slot->ctrl;
 615
 616         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 617
 618         *value = ctrl->speed;
 619
 620         return 0;
 621 }
 622
 623 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
 624         .owner =                THIS_MODULE,
 625         .set_attention_status = set_attention_status,
 626         .enable_slot =          process_SI,
 627         .disable_slot =         process_SS,
 628         .hardware_test =        hardware_test,
 629         .get_power_status =     get_power_status,
 630         .get_attention_status = get_attention_status,
 631         .get_latch_status =     get_latch_status,
 632         .get_adapter_status =   get_adapter_status,
 633         .get_max_bus_speed =    get_max_bus_speed,
 634         .get_cur_bus_speed =    get_cur_bus_speed,
 635 };
 636
 637 #define SLOT_NAME_SIZE 10
 638
 639 static int ctrl_slot_setup(struct controller *ctrl,
 640                         void __iomem *smbios_start,
 641                         void __iomem *smbios_table)
 642 {
 643         struct slot *slot;
 644         struct hotplug_slot *hotplug_slot;
 645         struct hotplug_slot_info *hotplug_slot_info;
 646         u8 number_of_slots;
 647         u8 slot_device;
 648         u8 slot_number;
 649         u8 ctrl_slot;
 650         u32 tempdword;
 651         char name[SLOT_NAME_SIZE];
 652         void __iomem *slot_entry= NULL;
 653         int result = -ENOMEM;
 654
 655         dbg("%s\n", __func__);
 656
 657         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 658
 659         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 660         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
 661         slot_number = ctrl->first_slot;
 662
 663         while (number_of_slots) {
 664                 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 665                 if (!slot)
 666                         goto error;
 667
 668                 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
 669                                                 GFP_KERNEL);
 670                 if (!slot->hotplug_slot)
 671                         goto error_slot;
 672                 hotplug_slot = slot->hotplug_slot;
 673
 674                 hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)),
 675                                                         GFP_KERNEL);
 676                 if (!hotplug_slot->info)
 677                         goto error_hpslot;
 678                 hotplug_slot_info = hotplug_slot->info;
 679
 680                 slot->ctrl = ctrl;
 681                 slot->bus = ctrl->bus;
 682                 slot->device = slot_device;
 683                 slot->number = slot_number;
 684                 dbg("slot->number = %u\n", slot->number);
 685
 686                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
 687                                         slot_entry);
 688
 689                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
 690                                 slot->number)) {
 691                         slot_entry = get_SMBIOS_entry(smbios_start,
 692                                                 smbios_table, 9, slot_entry);
 693                 }
 694
 695                 slot->p_sm_slot = slot_entry;
 696
 697                 init_timer(&slot->task_event);
 698                 slot->task_event.expires = jiffies + 5 * HZ;
 699                 slot->task_event.function = cpqhp_pushbutton_thread;
 700
 701                 /*FIXME: these capabilities aren't used but if they are
 702                  *       they need to be correctly implemented
 703                  */
 704                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
 705                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
 706
 707                 if (is_slot64bit(slot))
 708                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
 709                 if (is_slot66mhz(slot))
 710                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
 711                 if (ctrl->speed == PCI_SPEED_66MHz)
 712                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
 713
 714                 ctrl_slot =
 715                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
 716
 717                 /* Check presence */
 718                 slot->capabilities |=
 719                         ((((~tempdword) >> 23) |
 720                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
 721                 /* Check the switch state */
 722                 slot->capabilities |=
 723                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
 724                 /* Check the slot enable */
 725                 slot->capabilities |=
 726                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
 727
 728                 /* register this slot with the hotplug pci core */
 729                 hotplug_slot->release = &release_slot;
 730                 hotplug_slot->private = slot;
 731                 snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
 732                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
 733
 734                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
 735                 hotplug_slot_info->attention_status =
 736                         cpq_get_attention_status(ctrl, slot);
 737                 hotplug_slot_info->latch_status =
 738                         cpq_get_latch_status(ctrl, slot);
 739                 hotplug_slot_info->adapter_status =
 740                         get_presence_status(ctrl, slot);
 741
 742                 dbg("registering bus %d, dev %d, number %d, "
 743                                 "ctrl->slot_device_offset %d, slot %d\n",
 744                                 slot->bus, slot->device,
 745                                 slot->number, ctrl->slot_device_offset,
 746                                 slot_number);
 747                 result = pci_hp_register(hotplug_slot,
 748                                          ctrl->pci_dev->bus,
 749                                          slot->device,
 750                                          name);
 751                 if (result) {
 752                         err("pci_hp_register failed with error %d\n", result);
 753                         goto error_info;
 754                 }
 755
 756                 slot->next = ctrl->slot;
 757                 ctrl->slot = slot;
 758
 759                 number_of_slots--;
 760                 slot_device++;
 761                 slot_number++;
 762         }
 763
 764         return 0;
 765 error_info:
 766         kfree(hotplug_slot_info);
 767 error_hpslot:
 768         kfree(hotplug_slot);
 769 error_slot:
 770         kfree(slot);
 771 error:
 772         return result;
 773 }
 774
 775 static int one_time_init(void)
 776 {
 777         int loop;
 778         int retval = 0;
 779
 780         if (initialized)
 781                 return 0;
 782
 783         power_mode = 0;
 784
 785         retval = pci_print_IRQ_route();
 786         if (retval)
 787                 goto error;
 788
 789         dbg("Initialize + Start the notification mechanism \n");
 790
 791         retval = cpqhp_event_start_thread();
 792         if (retval)
 793                 goto error;
 794
 795         dbg("Initialize slot lists\n");
 796         for (loop = 0; loop < 256; loop++)
 797                 cpqhp_slot_list[loop] = NULL;
 798
 799         /* FIXME: We also need to hook the NMI handler eventually.
 800          * this also needs to be worked with Christoph
 801          * register_NMI_handler();
 802          */
 803         /* Map rom address */
 804         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
 805         if (!cpqhp_rom_start) {
 806                 err ("Could not ioremap memory region for ROM\n");
 807                 retval = -EIO;
 808                 goto error;
 809         }
 810
 811         /* Now, map the int15 entry point if we are on compaq specific
 812          * hardware
 813          */
 814         compaq_nvram_init(cpqhp_rom_start);
 815
 816         /* Map smbios table entry point structure */
 817         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
 818                                         cpqhp_rom_start + ROM_PHY_LEN);
 819         if (!smbios_table) {
 820                 err ("Could not find the SMBIOS pointer in memory\n");
 821                 retval = -EIO;
 822                 goto error_rom_start;
 823         }
 824
 825         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
 826                                         readw(smbios_table + ST_LENGTH));
 827         if (!smbios_start) {
 828                 err ("Could not ioremap memory region taken from SMBIOS values\n");
 829                 retval = -EIO;
 830                 goto error_smbios_start;
 831         }
 832
 833         initialized = 1;
 834
 835         return retval;
 836
 837 error_smbios_start:
 838         iounmap(smbios_start);
 839 error_rom_start:
 840         iounmap(cpqhp_rom_start);
 841 error:
 842         return retval;
 843 }
 844
 845 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 846 {
 847         u8 num_of_slots = 0;
 848         u8 hp_slot = 0;
 849         u8 device;
 850         u8 bus_cap;
 851         u16 temp_word;
 852         u16 vendor_id;
 853         u16 subsystem_vid;
 854         u16 subsystem_deviceid;
 855         u32 rc;
 856         struct controller *ctrl;
 857         struct pci_func *func;
 858         int err;
 859
 860         err = pci_enable_device(pdev);
 861         if (err) {
 862                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 863                         pci_name(pdev), err);
 864                 return err;
 865         }
 866
 867         /* Need to read VID early b/c it's used to differentiate CPQ and INTC
 868          * discovery
 869          */
 870         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
 871         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
 872                 err(msg_HPC_non_compaq_or_intel);
 873                 rc = -ENODEV;
 874                 goto err_disable_device;
 875         }
 876         dbg("Vendor ID: %x\n", vendor_id);
 877
 878         dbg("revision: %d\n", pdev->revision);
 879         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 880                 err(msg_HPC_rev_error);
 881                 rc = -ENODEV;
 882                 goto err_disable_device;
 883         }
 884
 885         /* Check for the proper subsytem ID's
 886          * Intel uses a different SSID programming model than Compaq.
 887          * For Intel, each SSID bit identifies a PHP capability.
 888          * Also Intel HPC's may have RID=0.
 889          */
 890         if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 891                 /* TODO: This code can be made to support non-Compaq or Intel
 892                  * subsystem IDs
 893                  */
 894                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 895                 if (rc) {
 896                         err("%s : pci_read_config_word failed\n", __func__);
 897                         goto err_disable_device;
 898                 }
 899                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 900                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 901                         err(msg_HPC_non_compaq_or_intel);
 902                         rc = -ENODEV;
 903                         goto err_disable_device;
 904                 }
 905
 906                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 907                 if (!ctrl) {
 908                         err("%s : out of memory\n", __func__);
 909                         rc = -ENOMEM;
 910                         goto err_disable_device;
 911                 }
 912
 913                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 914                 if (rc) {
 915                         err("%s : pci_read_config_word failed\n", __func__);
 916                         goto err_free_ctrl;
 917                 }
 918
 919                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 920
 921                 /* Set Vendor ID, so it can be accessed later from other
 922                  * functions
 923                  */
 924                 ctrl->vendor_id = vendor_id;
 925
 926                 switch (subsystem_vid) {
 927                         case PCI_VENDOR_ID_COMPAQ:
 928                                 if (pdev->revision >= 0x13) { /* CIOBX */
 929                                         ctrl->push_flag = 1;
 930                                         ctrl->slot_switch_type = 1;
 931                                         ctrl->push_button = 1;
 932                                         ctrl->pci_config_space = 1;
 933                                         ctrl->defeature_PHP = 1;
 934                                         ctrl->pcix_support = 1;
 935                                         ctrl->pcix_speed_capability = 1;
 936                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 937                                         if (bus_cap & 0x80) {
 938                                                 dbg("bus max supports 133MHz PCI-X\n");
 939                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 940                                                 break;
 941                                         }
 942                                         if (bus_cap & 0x40) {
 943                                                 dbg("bus max supports 100MHz PCI-X\n");
 944                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 945                                                 break;
 946                                         }
 947                                         if (bus_cap & 20) {
 948                                                 dbg("bus max supports 66MHz PCI-X\n");
 949                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 950                                                 break;
 951                                         }
 952                                         if (bus_cap & 10) {
 953                                                 dbg("bus max supports 66MHz PCI\n");
 954                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 955                                                 break;
 956                                         }
 957
 958                                         break;
 959                                 }
 960
 961                                 switch (subsystem_deviceid) {
 962                                         case PCI_SUB_HPC_ID:
 963                                                 /* Original 6500/7000 implementation */
 964                                                 ctrl->slot_switch_type = 1;
 965                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 966                                                 ctrl->push_button = 0;
 967                                                 ctrl->pci_config_space = 1;
 968                                                 ctrl->defeature_PHP = 1;
 969                                                 ctrl->pcix_support = 0;
 970                                                 ctrl->pcix_speed_capability = 0;
 971                                                 break;
 972                                         case PCI_SUB_HPC_ID2:
 973                                                 /* First Pushbutton implementation */
 974                                                 ctrl->push_flag = 1;
 975                                                 ctrl->slot_switch_type = 1;
 976                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 977                                                 ctrl->push_button = 1;
 978                                                 ctrl->pci_config_space = 1;
 979                                                 ctrl->defeature_PHP = 1;
 980                                                 ctrl->pcix_support = 0;
 981                                                 ctrl->pcix_speed_capability = 0;
 982                                                 break;
 983                                         case PCI_SUB_HPC_ID_INTC:
 984                                                 /* Third party (6500/7000) */
 985                                                 ctrl->slot_switch_type = 1;
 986                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 987                                                 ctrl->push_button = 0;
 988                                                 ctrl->pci_config_space = 1;
 989                                                 ctrl->defeature_PHP = 1;
 990                                                 ctrl->pcix_support = 0;
 991                                                 ctrl->pcix_speed_capability = 0;
 992                                                 break;
 993                                         case PCI_SUB_HPC_ID3:
 994                                                 /* First 66 Mhz implementation */
 995                                                 ctrl->push_flag = 1;
 996                                                 ctrl->slot_switch_type = 1;
 997                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 998                                                 ctrl->push_button = 1;
 999                                                 ctrl->pci_config_space = 1;
1000                                                 ctrl->defeature_PHP = 1;
1001                                                 ctrl->pcix_support = 0;
1002                                                 ctrl->pcix_speed_capability = 0;
1003                                                 break;
1004                                         case PCI_SUB_HPC_ID4:
1005                                                 /* First PCI-X implementation, 100MHz */
1006                                                 ctrl->push_flag = 1;
1007                                                 ctrl->slot_switch_type = 1;
1008                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
1009                                                 ctrl->push_button = 1;
1010                                                 ctrl->pci_config_space = 1;
1011                                                 ctrl->defeature_PHP = 1;
1012                                                 ctrl->pcix_support = 1;
1013                                                 ctrl->pcix_speed_capability = 0;
1014                                                 break;
1015                                         default:
1016                                                 err(msg_HPC_not_supported);
1017                                                 rc = -ENODEV;
1018                                                 goto err_free_ctrl;
1019                                 }
1020                                 break;
1021
1022                         case PCI_VENDOR_ID_INTEL:
1023                                 /* Check for speed capability (0=33, 1=66) */
1024                                 if (subsystem_deviceid & 0x0001) {
1025                                         ctrl->speed_capability = PCI_SPEED_66MHz;
1026                                 } else {
1027                                         ctrl->speed_capability = PCI_SPEED_33MHz;
1028                                 }
1029
1030                                 /* Check for push button */
1031                                 if (subsystem_deviceid & 0x0002) {
1032                                         /* no push button */
1033                                         ctrl->push_button = 0;
1034                                 } else {
1035                                         /* push button supported */
1036                                         ctrl->push_button = 1;
1037                                 }
1038
1039                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
1040                                 if (subsystem_deviceid & 0x0004) {
1041                                         /* no switch */
1042                                         ctrl->slot_switch_type = 0;
1043                                 } else {
1044                                         /* switch */
1045                                         ctrl->slot_switch_type = 1;
1046                                 }
1047
1048                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
1049                                 if (subsystem_deviceid & 0x0008) {
1050                                         ctrl->defeature_PHP = 1;        /* PHP supported */
1051                                 } else {
1052                                         ctrl->defeature_PHP = 0;        /* PHP not supported */
1053                                 }
1054
1055                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1056                                 if (subsystem_deviceid & 0x0010) {
1057                                         ctrl->alternate_base_address = 1;       /* supported */
1058                                 } else {
1059                                         ctrl->alternate_base_address = 0;       /* not supported */
1060                                 }
1061
1062                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1063                                 if (subsystem_deviceid & 0x0020) {
1064                                         ctrl->pci_config_space = 1;             /* supported */
1065                                 } else {
1066                                         ctrl->pci_config_space = 0;             /* not supported */
1067                                 }
1068
1069                                 /* PCI-X support */
1070                                 if (subsystem_deviceid & 0x0080) {
1071                                         /* PCI-X capable */
1072                                         ctrl->pcix_support = 1;
1073                                         /* Frequency of operation in PCI-X mode */
1074                                         if (subsystem_deviceid & 0x0040) {
1075                                                 /* 133MHz PCI-X if bit 7 is 1 */
1076                                                 ctrl->pcix_speed_capability = 1;
1077                                         } else {
1078                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1079                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1080                                                 ctrl->pcix_speed_capability = 0;
1081                                         }
1082                                 } else {
1083                                         /* Conventional PCI */
1084                                         ctrl->pcix_support = 0;
1085                                         ctrl->pcix_speed_capability = 0;
1086                                 }
1087                                 break;
1088
1089                         default:
1090                                 err(msg_HPC_not_supported);
1091                                 rc = -ENODEV;
1092                                 goto err_free_ctrl;
1093                 }
1094
1095         } else {
1096                 err(msg_HPC_not_supported);
1097                 return -ENODEV;
1098         }
1099
1100         /* Tell the user that we found one. */
1101         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1102                                         pdev->bus->number);
1103
1104         dbg("Hotplug controller capabilities:\n");
1105         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1106         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1107                                         "switch present" : "no switch");
1108         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1109                                         "PHP supported" : "PHP not supported");
1110         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1111                                         "supported" : "not supported");
1112         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1113                                         "supported" : "not supported");
1114         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1115                                         "supported" : "not supported");
1116         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1117                                         "supported" : "not supported");
1118
1119         ctrl->pci_dev = pdev;
1120         pci_set_drvdata(pdev, ctrl);
1121
1122         /* make our own copy of the pci bus structure,
1123          * as we like tweaking it a lot */
1124         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1125         if (!ctrl->pci_bus) {
1126                 err("out of memory\n");
1127                 rc = -ENOMEM;
1128                 goto err_free_ctrl;
1129         }
1130         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1131
1132         ctrl->bus = pdev->bus->number;
1133         ctrl->rev = pdev->revision;
1134         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1135                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1136
1137         mutex_init(&ctrl->crit_sect);
1138         init_waitqueue_head(&ctrl->queue);
1139
1140         /* initialize our threads if they haven't already been started up */
1141         rc = one_time_init();
1142         if (rc) {
1143                 goto err_free_bus;
1144         }
1145
1146         dbg("pdev = %p\n", pdev);
1147         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1148         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1149
1150         if (!request_mem_region(pci_resource_start(pdev, 0),
1151                                 pci_resource_len(pdev, 0), MY_NAME)) {
1152                 err("cannot reserve MMIO region\n");
1153                 rc = -ENOMEM;
1154                 goto err_free_bus;
1155         }
1156
1157         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1158                                         pci_resource_len(pdev, 0));
1159         if (!ctrl->hpc_reg) {
1160                 err("cannot remap MMIO region %llx @ %llx\n",
1161                     (unsigned long long)pci_resource_len(pdev, 0),
1162                     (unsigned long long)pci_resource_start(pdev, 0));
1163                 rc = -ENODEV;
1164                 goto err_free_mem_region;
1165         }
1166
1167         // Check for 66Mhz operation
1168         ctrl->speed = get_controller_speed(ctrl);
1169
1170
1171         /********************************************************
1172          *
1173          *              Save configuration headers for this and
1174          *              subordinate PCI buses
1175          *
1176          ********************************************************/
1177
1178         /* find the physical slot number of the first hot plug slot */
1179
1180         /* Get slot won't work for devices behind bridges, but
1181          * in this case it will always be called for the "base"
1182          * bus/dev/func of a slot.
1183          * CS: this is leveraging the PCIIRQ routing code from the kernel
1184          * (pci-pc.c: get_irq_routing_table) */
1185         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1186                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1187                                 &(ctrl->first_slot));
1188         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1189                                 ctrl->first_slot, rc);
1190         if (rc) {
1191                 err(msg_initialization_err, rc);
1192                 goto err_iounmap;
1193         }
1194
1195         /* Store PCI Config Space for all devices on this bus */
1196         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1197         if (rc) {
1198                 err("%s: unable to save PCI configuration data, error %d\n",
1199                                 __func__, rc);
1200                 goto err_iounmap;
1201         }
1202
1203         /*
1204          * Get IO, memory, and IRQ resources for new devices
1205          */
1206         /* The next line is required for cpqhp_find_available_resources */
1207         ctrl->interrupt = pdev->irq;
1208         if (ctrl->interrupt < 0x10) {
1209                 cpqhp_legacy_mode = 1;
1210                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1211         }
1212
1213         ctrl->cfgspc_irq = 0;
1214         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1215
1216         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1217         ctrl->add_support = !rc;
1218         if (rc) {
1219                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1220                 err("unable to locate PCI configuration resources for hot plug add.\n");
1221                 goto err_iounmap;
1222         }
1223
1224         /*
1225          * Finish setting up the hot plug ctrl device
1226          */
1227         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1228         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1229
1230         ctrl->next_event = 0;
1231
1232         /* Setup the slot information structures */
1233         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1234         if (rc) {
1235                 err(msg_initialization_err, 6);
1236                 err("%s: unable to save PCI configuration data, error %d\n",
1237                         __func__, rc);
1238                 goto err_iounmap;
1239         }
1240
1241         /* Mask all general input interrupts */
1242         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1243
1244         /* set up the interrupt */
1245         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1246         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1247                         IRQF_SHARED, MY_NAME, ctrl)) {
1248                 err("Can't get irq %d for the hotplug pci controller\n",
1249                         ctrl->interrupt);
1250                 rc = -ENODEV;
1251                 goto err_iounmap;
1252         }
1253
1254         /* Enable Shift Out interrupt and clear it, also enable SERR on power
1255          * fault
1256          */
1257         temp_word = readw(ctrl->hpc_reg + MISC);
1258         temp_word |= 0x4006;
1259         writew(temp_word, ctrl->hpc_reg + MISC);
1260
1261         /* Changed 05/05/97 to clear all interrupts at start */
1262         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1263
1264         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1265
1266         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1267
1268         if (!cpqhp_ctrl_list) {
1269                 cpqhp_ctrl_list = ctrl;
1270                 ctrl->next = NULL;
1271         } else {
1272                 ctrl->next = cpqhp_ctrl_list;
1273                 cpqhp_ctrl_list = ctrl;
1274         }
1275
1276         /* turn off empty slots here unless command line option "ON" set
1277          * Wait for exclusive access to hardware
1278          */
1279         mutex_lock(&ctrl->crit_sect);
1280
1281         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1282
1283         /* find first device number for the ctrl */
1284         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1285
1286         while (num_of_slots) {
1287                 dbg("num_of_slots: %d\n", num_of_slots);
1288                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1289                 if (!func)
1290                         break;
1291
1292                 hp_slot = func->device - ctrl->slot_device_offset;
1293                 dbg("hp_slot: %d\n", hp_slot);
1294
1295                 /* We have to save the presence info for these slots */
1296                 temp_word = ctrl->ctrl_int_comp >> 16;
1297                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1298                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1299
1300                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot))
1301                         func->switch_save = 0;
1302                 else
1303                         func->switch_save = 0x10;
1304
1305                 if (!power_mode)
1306                         if (!func->is_a_board) {
1307                                 green_LED_off(ctrl, hp_slot);
1308                                 slot_disable(ctrl, hp_slot);
1309                         }
1310
1311                 device++;
1312                 num_of_slots--;
1313         }
1314
1315         if (!power_mode) {
1316                 set_SOGO(ctrl);
1317                 /* Wait for SOBS to be unset */
1318                 wait_for_ctrl_irq(ctrl);
1319         }
1320
1321         rc = init_SERR(ctrl);
1322         if (rc) {
1323                 err("init_SERR failed\n");
1324                 mutex_unlock(&ctrl->crit_sect);
1325                 goto err_free_irq;
1326         }
1327
1328         /* Done with exclusive hardware access */
1329         mutex_unlock(&ctrl->crit_sect);
1330
1331         cpqhp_create_debugfs_files(ctrl);
1332
1333         return 0;
1334
1335 err_free_irq:
1336         free_irq(ctrl->interrupt, ctrl);
1337 err_iounmap:
1338         iounmap(ctrl->hpc_reg);
1339 err_free_mem_region:
1340         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1341 err_free_bus:
1342         kfree(ctrl->pci_bus);
1343 err_free_ctrl:
1344         kfree(ctrl);
1345 err_disable_device:
1346         pci_disable_device(pdev);
1347         return rc;
1348 }
1349
1350 static void __exit unload_cpqphpd(void)
1351 {
1352         struct pci_func *next;
1353         struct pci_func *TempSlot;
1354         int loop;
1355         u32 rc;
1356         struct controller *ctrl;
1357         struct controller *tctrl;
1358         struct pci_resource *res;
1359         struct pci_resource *tres;
1360
1361         rc = compaq_nvram_store(cpqhp_rom_start);
1362
1363         ctrl = cpqhp_ctrl_list;
1364
1365         while (ctrl) {
1366                 if (ctrl->hpc_reg) {
1367                         u16 misc;
1368                         rc = read_slot_enable (ctrl);
1369
1370                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1371                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1372
1373                         misc = readw(ctrl->hpc_reg + MISC);
1374                         misc &= 0xFFFD;
1375                         writew(misc, ctrl->hpc_reg + MISC);
1376                 }
1377
1378                 ctrl_slot_cleanup(ctrl);
1379
1380                 res = ctrl->io_head;
1381                 while (res) {
1382                         tres = res;
1383                         res = res->next;
1384                         kfree(tres);
1385                 }
1386
1387                 res = ctrl->mem_head;
1388                 while (res) {
1389                         tres = res;
1390                         res = res->next;
1391                         kfree(tres);
1392                 }
1393
1394                 res = ctrl->p_mem_head;
1395                 while (res) {
1396                         tres = res;
1397                         res = res->next;
1398                         kfree(tres);
1399                 }
1400
1401                 res = ctrl->bus_head;
1402                 while (res) {
1403                         tres = res;
1404                         res = res->next;
1405                         kfree(tres);
1406                 }
1407
1408                 kfree (ctrl->pci_bus);
1409
1410                 tctrl = ctrl;
1411                 ctrl = ctrl->next;
1412                 kfree(tctrl);
1413         }
1414
1415         for (loop = 0; loop < 256; loop++) {
1416                 next = cpqhp_slot_list[loop];
1417                 while (next != NULL) {
1418                         res = next->io_head;
1419                         while (res) {
1420                                 tres = res;
1421                                 res = res->next;
1422                                 kfree(tres);
1423                         }
1424
1425                         res = next->mem_head;
1426                         while (res) {
1427                                 tres = res;
1428                                 res = res->next;
1429                                 kfree(tres);
1430                         }
1431
1432                         res = next->p_mem_head;
1433                         while (res) {
1434                                 tres = res;
1435                                 res = res->next;
1436                                 kfree(tres);
1437                         }
1438
1439                         res = next->bus_head;
1440                         while (res) {
1441                                 tres = res;
1442                                 res = res->next;
1443                                 kfree(tres);
1444                         }
1445
1446                         TempSlot = next;
1447                         next = next->next;
1448                         kfree(TempSlot);
1449                 }
1450         }
1451
1452         /* Stop the notification mechanism */
1453         if (initialized)
1454                 cpqhp_event_stop_thread();
1455
1456         /* unmap the rom address */
1457         if (cpqhp_rom_start)
1458                 iounmap(cpqhp_rom_start);
1459         if (smbios_start)
1460                 iounmap(smbios_start);
1461 }
1462
1463 static struct pci_device_id hpcd_pci_tbl[] = {
1464         {
1465         /* handle any PCI Hotplug controller */
1466         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1467         .class_mask =   ~0,
1468
1469         /* no matter who makes it */
1470         .vendor =       PCI_ANY_ID,
1471         .device =       PCI_ANY_ID,
1472         .subvendor =    PCI_ANY_ID,
1473         .subdevice =    PCI_ANY_ID,
1474
1475         }, { /* end: all zeroes */ }
1476 };
1477
1478 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1479
1480 static struct pci_driver cpqhpc_driver = {
1481         .name =         "compaq_pci_hotplug",
1482         .id_table =     hpcd_pci_tbl,
1483         .probe =        cpqhpc_probe,
1484         /* remove:      cpqhpc_remove_one, */
1485 };
1486
1487 static int __init cpqhpc_init(void)
1488 {
1489         int result;
1490
1491         cpqhp_debug = debug;
1492
1493         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1494         cpqhp_initialize_debugfs();
1495         result = pci_register_driver(&cpqhpc_driver);
1496         dbg("pci_register_driver = %d\n", result);
1497         return result;
1498 }
1499
1500 static void __exit cpqhpc_cleanup(void)
1501 {
1502         dbg("unload_cpqphpd()\n");
1503         unload_cpqphpd();
1504
1505         dbg("pci_unregister_driver\n");
1506         pci_unregister_driver(&cpqhpc_driver);
1507         cpqhp_shutdown_debugfs();
1508 }
1509
1510 module_init(cpqhpc_init);
1511 module_exit(cpqhpc_cleanup);