drivers/pci/hotplug/cpqphp_core.c

   1 /*
   2  * Compaq Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
   6  * Copyright (C) 2001 IBM Corp.
   7  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <greg@kroah.com>
  26  *
  27  * Jan 12, 2003 -       Added 66/100/133MHz PCI-X support,
  28  *                      Torben Mathiasen <torben.mathiasen@hp.com>
  29  *
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/slab.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/pci.h>
  40 #include <linux/pci_hotplug.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43
  44 #include <asm/uaccess.h>
  45
  46 #include "cpqphp.h"
  47 #include "cpqphp_nvram.h"
  48 #include "../../../arch/x86/pci/pci.h"  /* horrible hack showing how processor dependent we are... */
  49
  50
  51 /* Global variables */
  52 int cpqhp_debug;
  53 int cpqhp_legacy_mode;
  54 struct controller *cpqhp_ctrl_list;     /* = NULL */
  55 struct pci_func *cpqhp_slot_list[256];
  56
  57 /* local variables */
  58 static void __iomem *smbios_table;
  59 static void __iomem *smbios_start;
  60 static void __iomem *cpqhp_rom_start;
  61 static int power_mode;
  62 static int debug;
  63 static int initialized;
  64
  65 #define DRIVER_VERSION  "0.9.8"
  66 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
  67 #define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
  68
  69 MODULE_AUTHOR(DRIVER_AUTHOR);
  70 MODULE_DESCRIPTION(DRIVER_DESC);
  71 MODULE_LICENSE("GPL");
  72
  73 module_param(power_mode, bool, 0644);
  74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
  75
  76 module_param(debug, bool, 0644);
  77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  78
  79 #define CPQHPC_MODULE_MINOR 208
  80
  81 static int one_time_init        (void);
  82 static int set_attention_status (struct hotplug_slot *slot, u8 value);
  83 static int process_SI           (struct hotplug_slot *slot);
  84 static int process_SS           (struct hotplug_slot *slot);
  85 static int hardware_test        (struct hotplug_slot *slot, u32 value);
  86 static int get_power_status     (struct hotplug_slot *slot, u8 *value);
  87 static int get_attention_status (struct hotplug_slot *slot, u8 *value);
  88 static int get_latch_status     (struct hotplug_slot *slot, u8 *value);
  89 static int get_adapter_status   (struct hotplug_slot *slot, u8 *value);
  90 static int get_max_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  91 static int get_cur_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  92
  93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
  94         .owner =                THIS_MODULE,
  95         .set_attention_status = set_attention_status,
  96         .enable_slot =          process_SI,
  97         .disable_slot =         process_SS,
  98         .hardware_test =        hardware_test,
  99         .get_power_status =     get_power_status,
 100         .get_attention_status = get_attention_status,
 101         .get_latch_status =     get_latch_status,
 102         .get_adapter_status =   get_adapter_status,
 103         .get_max_bus_speed =    get_max_bus_speed,
 104         .get_cur_bus_speed =    get_cur_bus_speed,
 105 };
 106
 107
 108 static inline int is_slot64bit(struct slot *slot)
 109 {
 110         return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
 111 }
 112
 113 static inline int is_slot66mhz(struct slot *slot)
 114 {
 115         return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
 116 }
 117
 118 /**
 119  * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
 120  * @begin: begin pointer for region to be scanned.
 121  * @end: end pointer for region to be scanned.
 122  *
 123  * Returns pointer to the head of the SMBIOS tables (or %NULL).
 124  */
 125 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
 126 {
 127         void __iomem *fp;
 128         void __iomem *endp;
 129         u8 temp1, temp2, temp3, temp4;
 130         int status = 0;
 131
 132         endp = (end - sizeof(u32) + 1);
 133
 134         for (fp = begin; fp <= endp; fp += 16) {
 135                 temp1 = readb(fp);
 136                 temp2 = readb(fp+1);
 137                 temp3 = readb(fp+2);
 138                 temp4 = readb(fp+3);
 139                 if (temp1 == '_' &&
 140                     temp2 == 'S' &&
 141                     temp3 == 'M' &&
 142                     temp4 == '_') {
 143                         status = 1;
 144                         break;
 145                 }
 146         }
 147
 148         if (!status)
 149                 fp = NULL;
 150
 151         dbg("Discovered SMBIOS Entry point at %p\n", fp);
 152
 153         return fp;
 154 }
 155
 156 /**
 157  * init_SERR - Initializes the per slot SERR generation.
 158  * @ctrl: controller to use
 159  *
 160  * For unexpected switch opens
 161  */
 162 static int init_SERR(struct controller * ctrl)
 163 {
 164         u32 tempdword;
 165         u32 number_of_slots;
 166         u8 physical_slot;
 167
 168         if (!ctrl)
 169                 return 1;
 170
 171         tempdword = ctrl->first_slot;
 172
 173         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 174         // Loop through slots
 175         while (number_of_slots) {
 176                 physical_slot = tempdword;
 177                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
 178                 tempdword++;
 179                 number_of_slots--;
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 /* nice debugging output */
 187 static int pci_print_IRQ_route (void)
 188 {
 189         struct irq_routing_table *routing_table;
 190         int len;
 191         int loop;
 192
 193         u8 tbus, tdevice, tslot;
 194
 195         routing_table = pcibios_get_irq_routing_table();
 196         if (routing_table == NULL) {
 197                 err("No BIOS Routing Table??? Not good\n");
 198                 return -ENOMEM;
 199         }
 200
 201         len = (routing_table->size - sizeof(struct irq_routing_table)) /
 202                         sizeof(struct irq_info);
 203         // Make sure I got at least one entry
 204         if (len == 0) {
 205                 kfree(routing_table);
 206                 return -1;
 207         }
 208
 209         dbg("bus dev func slot\n");
 210
 211         for (loop = 0; loop < len; ++loop) {
 212                 tbus = routing_table->slots[loop].bus;
 213                 tdevice = routing_table->slots[loop].devfn;
 214                 tslot = routing_table->slots[loop].slot;
 215                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 216
 217         }
 218         kfree(routing_table);
 219         return 0;
 220 }
 221
 222
 223 /**
 224  * get_subsequent_smbios_entry: get the next entry from bios table.
 225  * @smbios_start: where to start in the SMBIOS table
 226  * @smbios_table: location of the SMBIOS table
 227  * @curr: %NULL or pointer to previously returned structure
 228  *
 229  * Gets the first entry if previous == NULL;
 230  * otherwise, returns the next entry.
 231  * Uses global SMBIOS Table pointer.
 232  *
 233  * Returns a pointer to an SMBIOS structure or NULL if none found.
 234  */
 235 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 236                                                 void __iomem *smbios_table,
 237                                                 void __iomem *curr)
 238 {
 239         u8 bail = 0;
 240         u8 previous_byte = 1;
 241         void __iomem *p_temp;
 242         void __iomem *p_max;
 243
 244         if (!smbios_table || !curr)
 245                 return(NULL);
 246
 247         // set p_max to the end of the table
 248         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 249
 250         p_temp = curr;
 251         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 252
 253         while ((p_temp < p_max) && !bail) {
 254                 /* Look for the double NULL terminator
 255                  * The first condition is the previous byte
 256                  * and the second is the curr */
 257                 if (!previous_byte && !(readb(p_temp))) {
 258                         bail = 1;
 259                 }
 260
 261                 previous_byte = readb(p_temp);
 262                 p_temp++;
 263         }
 264
 265         if (p_temp < p_max) {
 266                 return p_temp;
 267         } else {
 268                 return NULL;
 269         }
 270 }
 271
 272
 273 /**
 274  * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
 275  * @smbios_start: where to start in the SMBIOS table
 276  * @smbios_table: location of the SMBIOS table
 277  * @type: SMBIOS structure type to be returned
 278  * @previous: %NULL or pointer to previously returned structure
 279  *
 280  * Gets the first entry of the specified type if previous == %NULL;
 281  * Otherwise, returns the next entry of the given type.
 282  * Uses global SMBIOS Table pointer.
 283  * Uses get_subsequent_smbios_entry.
 284  *
 285  * Returns a pointer to an SMBIOS structure or %NULL if none found.
 286  */
 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
 288                                         void __iomem *smbios_table,
 289                                         u8 type,
 290                                         void __iomem *previous)
 291 {
 292         if (!smbios_table)
 293                 return NULL;
 294
 295         if (!previous) {
 296                 previous = smbios_start;
 297         } else {
 298                 previous = get_subsequent_smbios_entry(smbios_start,
 299                                         smbios_table, previous);
 300         }
 301
 302         while (previous) {
 303                 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) {
 304                         previous = get_subsequent_smbios_entry(smbios_start,
 305                                                 smbios_table, previous);
 306                 } else {
 307                         break;
 308                 }
 309         }
 310
 311         return previous;
 312 }
 313
 314 static void release_slot(struct hotplug_slot *hotplug_slot)
 315 {
 316         struct slot *slot = hotplug_slot->private;
 317
 318         dbg("%s - physical_slot = %s\n", __func__, 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", __func__);
 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                                          ctrl->pci_dev->subordinate,
 439                                          slot->device);
 440                 if (result) {
 441                         err("pci_hp_register failed with error %d\n", result);
 442                         goto error_name;
 443                 }
 444
 445                 slot->next = ctrl->slot;
 446                 ctrl->slot = slot;
 447
 448                 number_of_slots--;
 449                 slot_device++;
 450                 slot_number++;
 451         }
 452
 453         return 0;
 454 error_name:
 455         kfree(hotplug_slot->name);
 456 error_info:
 457         kfree(hotplug_slot_info);
 458 error_hpslot:
 459         kfree(hotplug_slot);
 460 error_slot:
 461         kfree(slot);
 462 error:
 463         return result;
 464 }
 465
 466 static int ctrl_slot_cleanup (struct controller * ctrl)
 467 {
 468         struct slot *old_slot, *next_slot;
 469
 470         old_slot = ctrl->slot;
 471         ctrl->slot = NULL;
 472
 473         while (old_slot) {
 474                 /* memory will be freed by the release_slot callback */
 475                 next_slot = old_slot->next;
 476                 pci_hp_deregister (old_slot->hotplug_slot);
 477                 old_slot = next_slot;
 478         }
 479
 480         cpqhp_remove_debugfs_files(ctrl);
 481
 482         //Free IRQ associated with hot plug device
 483         free_irq(ctrl->interrupt, ctrl);
 484         //Unmap the memory
 485         iounmap(ctrl->hpc_reg);
 486         //Finally reclaim PCI mem
 487         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 488                            pci_resource_len(ctrl->pci_dev, 0));
 489
 490         return(0);
 491 }
 492
 493
 494 //============================================================================
 495 // function:    get_slot_mapping
 496 //
 497 // Description: Attempts to determine a logical slot mapping for a PCI
 498 //              device.  Won't work for more than one PCI-PCI bridge
 499 //              in a slot.
 500 //
 501 // Input:       u8 bus_num - bus number of PCI device
 502 //              u8 dev_num - device number of PCI device
 503 //              u8 *slot - Pointer to u8 where slot number will
 504 //                      be returned
 505 //
 506 // Output:      SUCCESS or FAILURE
 507 //=============================================================================
 508 static int
 509 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 510 {
 511         struct irq_routing_table *PCIIRQRoutingInfoLength;
 512         u32 work;
 513         long len;
 514         long loop;
 515
 516         u8 tbus, tdevice, tslot, bridgeSlot;
 517
 518         dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
 519
 520         bridgeSlot = 0xFF;
 521
 522         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 523         if (!PCIIRQRoutingInfoLength)
 524                 return -1;
 525
 526         len = (PCIIRQRoutingInfoLength->size -
 527                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 528         // Make sure I got at least one entry
 529         if (len == 0) {
 530                 kfree(PCIIRQRoutingInfoLength);
 531                 return -1;
 532         }
 533
 534         for (loop = 0; loop < len; ++loop) {
 535                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 536                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
 537                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 538
 539                 if ((tbus == bus_num) && (tdevice == dev_num)) {
 540                         *slot = tslot;
 541                         kfree(PCIIRQRoutingInfoLength);
 542                         return 0;
 543                 } else {
 544                         /* Did not get a match on the target PCI device. Check
 545                          * if the current IRQ table entry is a PCI-to-PCI bridge
 546                          * device.  If so, and it's secondary bus matches the
 547                          * bus number for the target device, I need to save the
 548                          * bridge's slot number.  If I can not find an entry for
 549                          * the target device, I will have to assume it's on the
 550                          * other side of the bridge, and assign it the bridge's
 551                          * slot. */
 552                         bus->number = tbus;
 553                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 554                                                 PCI_CLASS_REVISION, &work);
 555
 556                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 557                                 pci_bus_read_config_dword(bus,
 558                                                         PCI_DEVFN(tdevice, 0),
 559                                                         PCI_PRIMARY_BUS, &work);
 560                                 // See if bridge's secondary bus matches target bus.
 561                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
 562                                         bridgeSlot = tslot;
 563                                 }
 564                         }
 565                 }
 566
 567         }
 568
 569         // If we got here, we didn't find an entry in the IRQ mapping table
 570         // for the target PCI device.  If we did determine that the target
 571         // device is on the other side of a PCI-to-PCI bridge, return the
 572         // slot number for the bridge.
 573         if (bridgeSlot != 0xFF) {
 574                 *slot = bridgeSlot;
 575                 kfree(PCIIRQRoutingInfoLength);
 576                 return 0;
 577         }
 578         kfree(PCIIRQRoutingInfoLength);
 579         // Couldn't find an entry in the routing table for this PCI device
 580         return -1;
 581 }
 582
 583
 584 /**
 585  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 586  * @ctrl: struct controller to use
 587  * @func: PCI device/function info
 588  * @status: LED control flag: 1 = LED on, 0 = LED off
 589  */
 590 static int
 591 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 592                                 u32 status)
 593 {
 594         u8 hp_slot;
 595
 596         if (func == NULL)
 597                 return(1);
 598
 599         hp_slot = func->device - ctrl->slot_device_offset;
 600
 601         // Wait for exclusive access to hardware
 602         mutex_lock(&ctrl->crit_sect);
 603
 604         if (status == 1) {
 605                 amber_LED_on (ctrl, hp_slot);
 606         } else if (status == 0) {
 607                 amber_LED_off (ctrl, hp_slot);
 608         } else {
 609                 // Done with exclusive hardware access
 610                 mutex_unlock(&ctrl->crit_sect);
 611                 return(1);
 612         }
 613
 614         set_SOGO(ctrl);
 615
 616         // Wait for SOBS to be unset
 617         wait_for_ctrl_irq (ctrl);
 618
 619         // Done with exclusive hardware access
 620         mutex_unlock(&ctrl->crit_sect);
 621
 622         return(0);
 623 }
 624
 625
 626 /**
 627  * set_attention_status - Turns the Amber LED for a slot on or off
 628  * @hotplug_slot: slot to change LED on
 629  * @status: LED control flag
 630  */
 631 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 632 {
 633         struct pci_func *slot_func;
 634         struct slot *slot = hotplug_slot->private;
 635         struct controller *ctrl = slot->ctrl;
 636         u8 bus;
 637         u8 devfn;
 638         u8 device;
 639         u8 function;
 640
 641         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 642
 643         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 644                 return -ENODEV;
 645
 646         device = devfn >> 3;
 647         function = devfn & 0x7;
 648         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 649
 650         slot_func = cpqhp_slot_find(bus, device, function);
 651         if (!slot_func)
 652                 return -ENODEV;
 653
 654         return cpqhp_set_attention_status(ctrl, slot_func, status);
 655 }
 656
 657
 658 static int process_SI(struct hotplug_slot *hotplug_slot)
 659 {
 660         struct pci_func *slot_func;
 661         struct slot *slot = hotplug_slot->private;
 662         struct controller *ctrl = slot->ctrl;
 663         u8 bus;
 664         u8 devfn;
 665         u8 device;
 666         u8 function;
 667
 668         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 669
 670         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 671                 return -ENODEV;
 672
 673         device = devfn >> 3;
 674         function = devfn & 0x7;
 675         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 676
 677         slot_func = cpqhp_slot_find(bus, device, function);
 678         if (!slot_func)
 679                 return -ENODEV;
 680
 681         slot_func->bus = bus;
 682         slot_func->device = device;
 683         slot_func->function = function;
 684         slot_func->configured = 0;
 685         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 686         return cpqhp_process_SI(ctrl, slot_func);
 687 }
 688
 689
 690 static int process_SS(struct hotplug_slot *hotplug_slot)
 691 {
 692         struct pci_func *slot_func;
 693         struct slot *slot = hotplug_slot->private;
 694         struct controller *ctrl = slot->ctrl;
 695         u8 bus;
 696         u8 devfn;
 697         u8 device;
 698         u8 function;
 699
 700         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 701
 702         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 703                 return -ENODEV;
 704
 705         device = devfn >> 3;
 706         function = devfn & 0x7;
 707         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 708
 709         slot_func = cpqhp_slot_find(bus, device, function);
 710         if (!slot_func)
 711                 return -ENODEV;
 712
 713         dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
 714         return cpqhp_process_SS(ctrl, slot_func);
 715 }
 716
 717
 718 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 719 {
 720         struct slot *slot = hotplug_slot->private;
 721         struct controller *ctrl = slot->ctrl;
 722
 723         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 724
 725         return cpqhp_hardware_test(ctrl, value);
 726 }
 727
 728
 729 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 730 {
 731         struct slot *slot = hotplug_slot->private;
 732         struct controller *ctrl = slot->ctrl;
 733
 734         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 735
 736         *value = get_slot_enabled(ctrl, slot);
 737         return 0;
 738 }
 739
 740 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 741 {
 742         struct slot *slot = hotplug_slot->private;
 743         struct controller *ctrl = slot->ctrl;
 744
 745         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 746
 747         *value = cpq_get_attention_status(ctrl, slot);
 748         return 0;
 749 }
 750
 751 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 752 {
 753         struct slot *slot = hotplug_slot->private;
 754         struct controller *ctrl = slot->ctrl;
 755
 756         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 757
 758         *value = cpq_get_latch_status(ctrl, slot);
 759
 760         return 0;
 761 }
 762
 763 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 764 {
 765         struct slot *slot = hotplug_slot->private;
 766         struct controller *ctrl = slot->ctrl;
 767
 768         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 769
 770         *value = get_presence_status(ctrl, slot);
 771
 772         return 0;
 773 }
 774
 775 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 776 {
 777         struct slot *slot = hotplug_slot->private;
 778         struct controller *ctrl = slot->ctrl;
 779
 780         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 781
 782         *value = ctrl->speed_capability;
 783
 784         return 0;
 785 }
 786
 787 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 788 {
 789         struct slot *slot = hotplug_slot->private;
 790         struct controller *ctrl = slot->ctrl;
 791
 792         dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
 793
 794         *value = ctrl->speed;
 795
 796         return 0;
 797 }
 798
 799 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 800 {
 801         u8 num_of_slots = 0;
 802         u8 hp_slot = 0;
 803         u8 device;
 804         u8 bus_cap;
 805         u16 temp_word;
 806         u16 vendor_id;
 807         u16 subsystem_vid;
 808         u16 subsystem_deviceid;
 809         u32 rc;
 810         struct controller *ctrl;
 811         struct pci_func *func;
 812         int err;
 813
 814         err = pci_enable_device(pdev);
 815         if (err) {
 816                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 817                         pci_name(pdev), err);
 818                 return err;
 819         }
 820
 821         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
 822         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
 823         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
 824                 err(msg_HPC_non_compaq_or_intel);
 825                 rc = -ENODEV;
 826                 goto err_disable_device;
 827         }
 828         dbg("Vendor ID: %x\n", vendor_id);
 829
 830         dbg("revision: %d\n", pdev->revision);
 831         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 832                 err(msg_HPC_rev_error);
 833                 rc = -ENODEV;
 834                 goto err_disable_device;
 835         }
 836
 837         /* Check for the proper subsytem ID's
 838          * Intel uses a different SSID programming model than Compaq.
 839          * For Intel, each SSID bit identifies a PHP capability.
 840          * Also Intel HPC's may have RID=0.
 841          */
 842         if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 843                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
 844                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 845                 if (rc) {
 846                         err("%s : pci_read_config_word failed\n", __func__);
 847                         goto err_disable_device;
 848                 }
 849                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 850                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 851                         err(msg_HPC_non_compaq_or_intel);
 852                         rc = -ENODEV;
 853                         goto err_disable_device;
 854                 }
 855
 856                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 857                 if (!ctrl) {
 858                         err("%s : out of memory\n", __func__);
 859                         rc = -ENOMEM;
 860                         goto err_disable_device;
 861                 }
 862
 863                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 864                 if (rc) {
 865                         err("%s : pci_read_config_word failed\n", __func__);
 866                         goto err_free_ctrl;
 867                 }
 868
 869                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 870
 871                 /* Set Vendor ID, so it can be accessed later from other functions */
 872                 ctrl->vendor_id = vendor_id;
 873
 874                 switch (subsystem_vid) {
 875                         case PCI_VENDOR_ID_COMPAQ:
 876                                 if (pdev->revision >= 0x13) { /* CIOBX */
 877                                         ctrl->push_flag = 1;
 878                                         ctrl->slot_switch_type = 1;
 879                                         ctrl->push_button = 1;
 880                                         ctrl->pci_config_space = 1;
 881                                         ctrl->defeature_PHP = 1;
 882                                         ctrl->pcix_support = 1;
 883                                         ctrl->pcix_speed_capability = 1;
 884                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 885                                         if (bus_cap & 0x80) {
 886                                                 dbg("bus max supports 133MHz PCI-X\n");
 887                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 888                                                 break;
 889                                         }
 890                                         if (bus_cap & 0x40) {
 891                                                 dbg("bus max supports 100MHz PCI-X\n");
 892                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 893                                                 break;
 894                                         }
 895                                         if (bus_cap & 20) {
 896                                                 dbg("bus max supports 66MHz PCI-X\n");
 897                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 898                                                 break;
 899                                         }
 900                                         if (bus_cap & 10) {
 901                                                 dbg("bus max supports 66MHz PCI\n");
 902                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 903                                                 break;
 904                                         }
 905
 906                                         break;
 907                                 }
 908
 909                                 switch (subsystem_deviceid) {
 910                                         case PCI_SUB_HPC_ID:
 911                                                 /* Original 6500/7000 implementation */
 912                                                 ctrl->slot_switch_type = 1;
 913                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 914                                                 ctrl->push_button = 0;
 915                                                 ctrl->pci_config_space = 1;
 916                                                 ctrl->defeature_PHP = 1;
 917                                                 ctrl->pcix_support = 0;
 918                                                 ctrl->pcix_speed_capability = 0;
 919                                                 break;
 920                                         case PCI_SUB_HPC_ID2:
 921                                                 /* First Pushbutton implementation */
 922                                                 ctrl->push_flag = 1;
 923                                                 ctrl->slot_switch_type = 1;
 924                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 925                                                 ctrl->push_button = 1;
 926                                                 ctrl->pci_config_space = 1;
 927                                                 ctrl->defeature_PHP = 1;
 928                                                 ctrl->pcix_support = 0;
 929                                                 ctrl->pcix_speed_capability = 0;
 930                                                 break;
 931                                         case PCI_SUB_HPC_ID_INTC:
 932                                                 /* Third party (6500/7000) */
 933                                                 ctrl->slot_switch_type = 1;
 934                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 935                                                 ctrl->push_button = 0;
 936                                                 ctrl->pci_config_space = 1;
 937                                                 ctrl->defeature_PHP = 1;
 938                                                 ctrl->pcix_support = 0;
 939                                                 ctrl->pcix_speed_capability = 0;
 940                                                 break;
 941                                         case PCI_SUB_HPC_ID3:
 942                                                 /* First 66 Mhz implementation */
 943                                                 ctrl->push_flag = 1;
 944                                                 ctrl->slot_switch_type = 1;
 945                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 946                                                 ctrl->push_button = 1;
 947                                                 ctrl->pci_config_space = 1;
 948                                                 ctrl->defeature_PHP = 1;
 949                                                 ctrl->pcix_support = 0;
 950                                                 ctrl->pcix_speed_capability = 0;
 951                                                 break;
 952                                         case PCI_SUB_HPC_ID4:
 953                                                 /* First PCI-X implementation, 100MHz */
 954                                                 ctrl->push_flag = 1;
 955                                                 ctrl->slot_switch_type = 1;
 956                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 957                                                 ctrl->push_button = 1;
 958                                                 ctrl->pci_config_space = 1;
 959                                                 ctrl->defeature_PHP = 1;
 960                                                 ctrl->pcix_support = 1;
 961                                                 ctrl->pcix_speed_capability = 0;
 962                                                 break;
 963                                         default:
 964                                                 err(msg_HPC_not_supported);
 965                                                 rc = -ENODEV;
 966                                                 goto err_free_ctrl;
 967                                 }
 968                                 break;
 969
 970                         case PCI_VENDOR_ID_INTEL:
 971                                 /* Check for speed capability (0=33, 1=66) */
 972                                 if (subsystem_deviceid & 0x0001) {
 973                                         ctrl->speed_capability = PCI_SPEED_66MHz;
 974                                 } else {
 975                                         ctrl->speed_capability = PCI_SPEED_33MHz;
 976                                 }
 977
 978                                 /* Check for push button */
 979                                 if (subsystem_deviceid & 0x0002) {
 980                                         /* no push button */
 981                                         ctrl->push_button = 0;
 982                                 } else {
 983                                         /* push button supported */
 984                                         ctrl->push_button = 1;
 985                                 }
 986
 987                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
 988                                 if (subsystem_deviceid & 0x0004) {
 989                                         /* no switch */
 990                                         ctrl->slot_switch_type = 0;
 991                                 } else {
 992                                         /* switch */
 993                                         ctrl->slot_switch_type = 1;
 994                                 }
 995
 996                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
 997                                 if (subsystem_deviceid & 0x0008) {
 998                                         ctrl->defeature_PHP = 1;        // PHP supported
 999                                 } else {
1000                                         ctrl->defeature_PHP = 0;        // PHP not supported
1001                                 }
1002
1003                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1004                                 if (subsystem_deviceid & 0x0010) {
1005                                         ctrl->alternate_base_address = 1;       // supported
1006                                 } else {
1007                                         ctrl->alternate_base_address = 0;       // not supported
1008                                 }
1009
1010                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1011                                 if (subsystem_deviceid & 0x0020) {
1012                                         ctrl->pci_config_space = 1;             // supported
1013                                 } else {
1014                                         ctrl->pci_config_space = 0;             // not supported
1015                                 }
1016
1017                                 /* PCI-X support */
1018                                 if (subsystem_deviceid & 0x0080) {
1019                                         /* PCI-X capable */
1020                                         ctrl->pcix_support = 1;
1021                                         /* Frequency of operation in PCI-X mode */
1022                                         if (subsystem_deviceid & 0x0040) {
1023                                                 /* 133MHz PCI-X if bit 7 is 1 */
1024                                                 ctrl->pcix_speed_capability = 1;
1025                                         } else {
1026                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1027                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1028                                                 ctrl->pcix_speed_capability = 0;
1029                                         }
1030                                 } else {
1031                                         /* Conventional PCI */
1032                                         ctrl->pcix_support = 0;
1033                                         ctrl->pcix_speed_capability = 0;
1034                                 }
1035                                 break;
1036
1037                         default:
1038                                 err(msg_HPC_not_supported);
1039                                 rc = -ENODEV;
1040                                 goto err_free_ctrl;
1041                 }
1042
1043         } else {
1044                 err(msg_HPC_not_supported);
1045                 return -ENODEV;
1046         }
1047
1048         // Tell the user that we found one.
1049         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1050                                         pdev->bus->number);
1051
1052         dbg("Hotplug controller capabilities:\n");
1053         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1054         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1055                                         "switch present" : "no switch");
1056         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1057                                         "PHP supported" : "PHP not supported");
1058         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1059                                         "supported" : "not supported");
1060         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1061                                         "supported" : "not supported");
1062         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1063                                         "supported" : "not supported");
1064         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1065                                         "supported" : "not supported");
1066
1067         ctrl->pci_dev = pdev;
1068         pci_set_drvdata(pdev, ctrl);
1069
1070         /* make our own copy of the pci bus structure,
1071          * as we like tweaking it a lot */
1072         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1073         if (!ctrl->pci_bus) {
1074                 err("out of memory\n");
1075                 rc = -ENOMEM;
1076                 goto err_free_ctrl;
1077         }
1078         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1079
1080         ctrl->bus = pdev->bus->number;
1081         ctrl->rev = pdev->revision;
1082         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1083                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1084
1085         mutex_init(&ctrl->crit_sect);
1086         init_waitqueue_head(&ctrl->queue);
1087
1088         /* initialize our threads if they haven't already been started up */
1089         rc = one_time_init();
1090         if (rc) {
1091                 goto err_free_bus;
1092         }
1093
1094         dbg("pdev = %p\n", pdev);
1095         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1096         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1097
1098         if (!request_mem_region(pci_resource_start(pdev, 0),
1099                                 pci_resource_len(pdev, 0), MY_NAME)) {
1100                 err("cannot reserve MMIO region\n");
1101                 rc = -ENOMEM;
1102                 goto err_free_bus;
1103         }
1104
1105         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1106                                         pci_resource_len(pdev, 0));
1107         if (!ctrl->hpc_reg) {
1108                 err("cannot remap MMIO region %llx @ %llx\n",
1109                     (unsigned long long)pci_resource_len(pdev, 0),
1110                     (unsigned long long)pci_resource_start(pdev, 0));
1111                 rc = -ENODEV;
1112                 goto err_free_mem_region;
1113         }
1114
1115         // Check for 66Mhz operation
1116         ctrl->speed = get_controller_speed(ctrl);
1117
1118
1119         /********************************************************
1120          *
1121          *              Save configuration headers for this and
1122          *              subordinate PCI buses
1123          *
1124          ********************************************************/
1125
1126         // find the physical slot number of the first hot plug slot
1127
1128         /* Get slot won't work for devices behind bridges, but
1129          * in this case it will always be called for the "base"
1130          * bus/dev/func of a slot.
1131          * CS: this is leveraging the PCIIRQ routing code from the kernel
1132          * (pci-pc.c: get_irq_routing_table) */
1133         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1134                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1135                                 &(ctrl->first_slot));
1136         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1137                                 ctrl->first_slot, rc);
1138         if (rc) {
1139                 err(msg_initialization_err, rc);
1140                 goto err_iounmap;
1141         }
1142
1143         // Store PCI Config Space for all devices on this bus
1144         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1145         if (rc) {
1146                 err("%s: unable to save PCI configuration data, error %d\n",
1147                                 __func__, rc);
1148                 goto err_iounmap;
1149         }
1150
1151         /*
1152          * Get IO, memory, and IRQ resources for new devices
1153          */
1154         // The next line is required for cpqhp_find_available_resources
1155         ctrl->interrupt = pdev->irq;
1156         if (ctrl->interrupt < 0x10) {
1157                 cpqhp_legacy_mode = 1;
1158                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1159         }
1160
1161         ctrl->cfgspc_irq = 0;
1162         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1163
1164         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1165         ctrl->add_support = !rc;
1166         if (rc) {
1167                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1168                 err("unable to locate PCI configuration resources for hot plug add.\n");
1169                 goto err_iounmap;
1170         }
1171
1172         /*
1173          * Finish setting up the hot plug ctrl device
1174          */
1175         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1176         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1177
1178         ctrl->next_event = 0;
1179
1180         /* Setup the slot information structures */
1181         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1182         if (rc) {
1183                 err(msg_initialization_err, 6);
1184                 err("%s: unable to save PCI configuration data, error %d\n",
1185                         __func__, rc);
1186                 goto err_iounmap;
1187         }
1188
1189         /* Mask all general input interrupts */
1190         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1191
1192         /* set up the interrupt */
1193         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1194         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1195                         IRQF_SHARED, MY_NAME, ctrl)) {
1196                 err("Can't get irq %d for the hotplug pci controller\n",
1197                         ctrl->interrupt);
1198                 rc = -ENODEV;
1199                 goto err_iounmap;
1200         }
1201
1202         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1203         temp_word = readw(ctrl->hpc_reg + MISC);
1204         temp_word |= 0x4006;
1205         writew(temp_word, ctrl->hpc_reg + MISC);
1206
1207         // Changed 05/05/97 to clear all interrupts at start
1208         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1209
1210         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1211
1212         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1213
1214         if (!cpqhp_ctrl_list) {
1215                 cpqhp_ctrl_list = ctrl;
1216                 ctrl->next = NULL;
1217         } else {
1218                 ctrl->next = cpqhp_ctrl_list;
1219                 cpqhp_ctrl_list = ctrl;
1220         }
1221
1222         // turn off empty slots here unless command line option "ON" set
1223         // Wait for exclusive access to hardware
1224         mutex_lock(&ctrl->crit_sect);
1225
1226         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1227
1228         // find first device number for the ctrl
1229         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1230
1231         while (num_of_slots) {
1232                 dbg("num_of_slots: %d\n", num_of_slots);
1233                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1234                 if (!func)
1235                         break;
1236
1237                 hp_slot = func->device - ctrl->slot_device_offset;
1238                 dbg("hp_slot: %d\n", hp_slot);
1239
1240                 // We have to save the presence info for these slots
1241                 temp_word = ctrl->ctrl_int_comp >> 16;
1242                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1243                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1244
1245                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1246                         func->switch_save = 0;
1247                 } else {
1248                         func->switch_save = 0x10;
1249                 }
1250
1251                 if (!power_mode) {
1252                         if (!func->is_a_board) {
1253                                 green_LED_off(ctrl, hp_slot);
1254                                 slot_disable(ctrl, hp_slot);
1255                         }
1256                 }
1257
1258                 device++;
1259                 num_of_slots--;
1260         }
1261
1262         if (!power_mode) {
1263                 set_SOGO(ctrl);
1264                 // Wait for SOBS to be unset
1265                 wait_for_ctrl_irq(ctrl);
1266         }
1267
1268         rc = init_SERR(ctrl);
1269         if (rc) {
1270                 err("init_SERR failed\n");
1271                 mutex_unlock(&ctrl->crit_sect);
1272                 goto err_free_irq;
1273         }
1274
1275         // Done with exclusive hardware access
1276         mutex_unlock(&ctrl->crit_sect);
1277
1278         cpqhp_create_debugfs_files(ctrl);
1279
1280         return 0;
1281
1282 err_free_irq:
1283         free_irq(ctrl->interrupt, ctrl);
1284 err_iounmap:
1285         iounmap(ctrl->hpc_reg);
1286 err_free_mem_region:
1287         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1288 err_free_bus:
1289         kfree(ctrl->pci_bus);
1290 err_free_ctrl:
1291         kfree(ctrl);
1292 err_disable_device:
1293         pci_disable_device(pdev);
1294         return rc;
1295 }
1296
1297
1298 static int one_time_init(void)
1299 {
1300         int loop;
1301         int retval = 0;
1302
1303         if (initialized)
1304                 return 0;
1305
1306         power_mode = 0;
1307
1308         retval = pci_print_IRQ_route();
1309         if (retval)
1310                 goto error;
1311
1312         dbg("Initialize + Start the notification mechanism \n");
1313
1314         retval = cpqhp_event_start_thread();
1315         if (retval)
1316                 goto error;
1317
1318         dbg("Initialize slot lists\n");
1319         for (loop = 0; loop < 256; loop++) {
1320                 cpqhp_slot_list[loop] = NULL;
1321         }
1322
1323         // FIXME: We also need to hook the NMI handler eventually.
1324         // this also needs to be worked with Christoph
1325         // register_NMI_handler();
1326
1327         // Map rom address
1328         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1329         if (!cpqhp_rom_start) {
1330                 err ("Could not ioremap memory region for ROM\n");
1331                 retval = -EIO;
1332                 goto error;
1333         }
1334
1335         /* Now, map the int15 entry point if we are on compaq specific hardware */
1336         compaq_nvram_init(cpqhp_rom_start);
1337
1338         /* Map smbios table entry point structure */
1339         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1340                                         cpqhp_rom_start + ROM_PHY_LEN);
1341         if (!smbios_table) {
1342                 err ("Could not find the SMBIOS pointer in memory\n");
1343                 retval = -EIO;
1344                 goto error_rom_start;
1345         }
1346
1347         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1348                                         readw(smbios_table + ST_LENGTH));
1349         if (!smbios_start) {
1350                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1351                 retval = -EIO;
1352                 goto error_smbios_start;
1353         }
1354
1355         initialized = 1;
1356
1357         return retval;
1358
1359 error_smbios_start:
1360         iounmap(smbios_start);
1361 error_rom_start:
1362         iounmap(cpqhp_rom_start);
1363 error:
1364         return retval;
1365 }
1366
1367
1368 static void __exit unload_cpqphpd(void)
1369 {
1370         struct pci_func *next;
1371         struct pci_func *TempSlot;
1372         int loop;
1373         u32 rc;
1374         struct controller *ctrl;
1375         struct controller *tctrl;
1376         struct pci_resource *res;
1377         struct pci_resource *tres;
1378
1379         rc = compaq_nvram_store(cpqhp_rom_start);
1380
1381         ctrl = cpqhp_ctrl_list;
1382
1383         while (ctrl) {
1384                 if (ctrl->hpc_reg) {
1385                         u16 misc;
1386                         rc = read_slot_enable (ctrl);
1387
1388                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1389                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1390
1391                         misc = readw(ctrl->hpc_reg + MISC);
1392                         misc &= 0xFFFD;
1393                         writew(misc, ctrl->hpc_reg + MISC);
1394                 }
1395
1396                 ctrl_slot_cleanup(ctrl);
1397
1398                 res = ctrl->io_head;
1399                 while (res) {
1400                         tres = res;
1401                         res = res->next;
1402                         kfree(tres);
1403                 }
1404
1405                 res = ctrl->mem_head;
1406                 while (res) {
1407                         tres = res;
1408                         res = res->next;
1409                         kfree(tres);
1410                 }
1411
1412                 res = ctrl->p_mem_head;
1413                 while (res) {
1414                         tres = res;
1415                         res = res->next;
1416                         kfree(tres);
1417                 }
1418
1419                 res = ctrl->bus_head;
1420                 while (res) {
1421                         tres = res;
1422                         res = res->next;
1423                         kfree(tres);
1424                 }
1425
1426                 kfree (ctrl->pci_bus);
1427
1428                 tctrl = ctrl;
1429                 ctrl = ctrl->next;
1430                 kfree(tctrl);
1431         }
1432
1433         for (loop = 0; loop < 256; loop++) {
1434                 next = cpqhp_slot_list[loop];
1435                 while (next != NULL) {
1436                         res = next->io_head;
1437                         while (res) {
1438                                 tres = res;
1439                                 res = res->next;
1440                                 kfree(tres);
1441                         }
1442
1443                         res = next->mem_head;
1444                         while (res) {
1445                                 tres = res;
1446                                 res = res->next;
1447                                 kfree(tres);
1448                         }
1449
1450                         res = next->p_mem_head;
1451                         while (res) {
1452                                 tres = res;
1453                                 res = res->next;
1454                                 kfree(tres);
1455                         }
1456
1457                         res = next->bus_head;
1458                         while (res) {
1459                                 tres = res;
1460                                 res = res->next;
1461                                 kfree(tres);
1462                         }
1463
1464                         TempSlot = next;
1465                         next = next->next;
1466                         kfree(TempSlot);
1467                 }
1468         }
1469
1470         // Stop the notification mechanism
1471         if (initialized)
1472                 cpqhp_event_stop_thread();
1473
1474         //unmap the rom address
1475         if (cpqhp_rom_start)
1476                 iounmap(cpqhp_rom_start);
1477         if (smbios_start)
1478                 iounmap(smbios_start);
1479 }
1480
1481
1482
1483 static struct pci_device_id hpcd_pci_tbl[] = {
1484         {
1485         /* handle any PCI Hotplug controller */
1486         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1487         .class_mask =   ~0,
1488
1489         /* no matter who makes it */
1490         .vendor =       PCI_ANY_ID,
1491         .device =       PCI_ANY_ID,
1492         .subvendor =    PCI_ANY_ID,
1493         .subdevice =    PCI_ANY_ID,
1494
1495         }, { /* end: all zeroes */ }
1496 };
1497
1498 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1499
1500
1501
1502 static struct pci_driver cpqhpc_driver = {
1503         .name =         "compaq_pci_hotplug",
1504         .id_table =     hpcd_pci_tbl,
1505         .probe =        cpqhpc_probe,
1506         /* remove:      cpqhpc_remove_one, */
1507 };
1508
1509
1510
1511 static int __init cpqhpc_init(void)
1512 {
1513         int result;
1514
1515         cpqhp_debug = debug;
1516
1517         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1518         cpqhp_initialize_debugfs();
1519         result = pci_register_driver(&cpqhpc_driver);
1520         dbg("pci_register_driver = %d\n", result);
1521         return result;
1522 }
1523
1524
1525 static void __exit cpqhpc_cleanup(void)
1526 {
1527         dbg("unload_cpqphpd()\n");
1528         unload_cpqphpd();
1529
1530         dbg("pci_unregister_driver\n");
1531         pci_unregister_driver(&cpqhpc_driver);
1532         cpqhp_shutdown_debugfs();
1533 }
1534
1535
1536 module_init(cpqhpc_init);
1537 module_exit(cpqhpc_cleanup);
1538
1539