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/config.h>
  33 #include <linux/module.h>
  34 #include <linux/moduleparam.h>
  35 #include <linux/kernel.h>
  36 #include <linux/types.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/slab.h>
  39 #include <linux/workqueue.h>
  40 #include <linux/pci.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43
  44 #include <asm/uaccess.h>
  45
  46 #include "cpqphp.h"
  47 #include "cpqphp_nvram.h"
  48 #include "../../../arch/i386/pci/pci.h" /* horrible hack showing how processor dependent we are... */
  49
  50
  51 /* Global variables */
  52 int cpqhp_debug;
  53 int cpqhp_legacy_mode;
  54 struct controller *cpqhp_ctrl_list;     /* = NULL */
  55 struct pci_func *cpqhp_slot_list[256];
  56
  57 /* local variables */
  58 static void __iomem *smbios_table;
  59 static void __iomem *smbios_start;
  60 static void __iomem *cpqhp_rom_start;
  61 static int power_mode;
  62 static int debug;
  63 static int initialized;
  64
  65 #define DRIVER_VERSION  "0.9.8"
  66 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
  67 #define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
  68
  69 MODULE_AUTHOR(DRIVER_AUTHOR);
  70 MODULE_DESCRIPTION(DRIVER_DESC);
  71 MODULE_LICENSE("GPL");
  72
  73 module_param(power_mode, bool, 0644);
  74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
  75
  76 module_param(debug, bool, 0644);
  77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  78
  79 #define CPQHPC_MODULE_MINOR 208
  80
  81 static int one_time_init        (void);
  82 static int set_attention_status (struct hotplug_slot *slot, u8 value);
  83 static int process_SI           (struct hotplug_slot *slot);
  84 static int process_SS           (struct hotplug_slot *slot);
  85 static int hardware_test        (struct hotplug_slot *slot, u32 value);
  86 static int get_power_status     (struct hotplug_slot *slot, u8 *value);
  87 static int get_attention_status (struct hotplug_slot *slot, u8 *value);
  88 static int get_latch_status     (struct hotplug_slot *slot, u8 *value);
  89 static int get_adapter_status   (struct hotplug_slot *slot, u8 *value);
  90 static int get_max_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  91 static int get_cur_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  92
  93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
  94         .owner =                THIS_MODULE,
  95         .set_attention_status = set_attention_status,
  96         .enable_slot =          process_SI,
  97         .disable_slot =         process_SS,
  98         .hardware_test =        hardware_test,
  99         .get_power_status =     get_power_status,
 100         .get_attention_status = get_attention_status,
 101         .get_latch_status =     get_latch_status,
 102         .get_adapter_status =   get_adapter_status,
 103         .get_max_bus_speed =    get_max_bus_speed,
 104         .get_cur_bus_speed =    get_cur_bus_speed,
 105 };
 106
 107
 108 static inline int is_slot64bit(struct slot *slot)
 109 {
 110         return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
 111 }
 112
 113 static inline int is_slot66mhz(struct slot *slot)
 114 {
 115         return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
 116 }
 117
 118 /**
 119  * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
 120  *
 121  * @begin: begin pointer for region to be scanned.
 122  * @end: end pointer for region to be scanned.
 123  *
 124  * Returns pointer to the head of the SMBIOS tables (or NULL)
 125  *
 126  */
 127 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
 128 {
 129         void __iomem *fp;
 130         void __iomem *endp;
 131         u8 temp1, temp2, temp3, temp4;
 132         int status = 0;
 133
 134         endp = (end - sizeof(u32) + 1);
 135
 136         for (fp = begin; fp <= endp; fp += 16) {
 137                 temp1 = readb(fp);
 138                 temp2 = readb(fp+1);
 139                 temp3 = readb(fp+2);
 140                 temp4 = readb(fp+3);
 141                 if (temp1 == '_' &&
 142                     temp2 == 'S' &&
 143                     temp3 == 'M' &&
 144                     temp4 == '_') {
 145                         status = 1;
 146                         break;
 147                 }
 148         }
 149
 150         if (!status)
 151                 fp = NULL;
 152
 153         dbg("Discovered SMBIOS Entry point at %p\n", fp);
 154
 155         return fp;
 156 }
 157
 158 /**
 159  * init_SERR - Initializes the per slot SERR generation.
 160  *
 161  * For unexpected switch opens
 162  *
 163  */
 164 static int init_SERR(struct controller * ctrl)
 165 {
 166         u32 tempdword;
 167         u32 number_of_slots;
 168         u8 physical_slot;
 169
 170         if (!ctrl)
 171                 return 1;
 172
 173         tempdword = ctrl->first_slot;
 174
 175         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 176         // Loop through slots
 177         while (number_of_slots) {
 178                 physical_slot = tempdword;
 179                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
 180                 tempdword++;
 181                 number_of_slots--;
 182         }
 183
 184         return 0;
 185 }
 186
 187
 188 /* nice debugging output */
 189 static int pci_print_IRQ_route (void)
 190 {
 191         struct irq_routing_table *routing_table;
 192         int len;
 193         int loop;
 194
 195         u8 tbus, tdevice, tslot;
 196
 197         routing_table = pcibios_get_irq_routing_table();
 198         if (routing_table == NULL) {
 199                 err("No BIOS Routing Table??? Not good\n");
 200                 return -ENOMEM;
 201         }
 202
 203         len = (routing_table->size - sizeof(struct irq_routing_table)) /
 204                         sizeof(struct irq_info);
 205         // Make sure I got at least one entry
 206         if (len == 0) {
 207                 kfree(routing_table);
 208                 return -1;
 209         }
 210
 211         dbg("bus dev func slot\n");
 212
 213         for (loop = 0; loop < len; ++loop) {
 214                 tbus = routing_table->slots[loop].bus;
 215                 tdevice = routing_table->slots[loop].devfn;
 216                 tslot = routing_table->slots[loop].slot;
 217                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 218
 219         }
 220         kfree(routing_table);
 221         return 0;
 222 }
 223
 224
 225 /**
 226  * get_subsequent_smbios_entry: get the next entry from bios table.
 227  *
 228  * Gets the first entry if previous == NULL
 229  * Otherwise, returns the next entry
 230  * Uses global SMBIOS Table pointer
 231  *
 232  * @curr: %NULL or pointer to previously returned structure
 233  *
 234  * returns a pointer to an SMBIOS structure or NULL if none found
 235  */
 236 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 237                                                 void __iomem *smbios_table,
 238                                                 void __iomem *curr)
 239 {
 240         u8 bail = 0;
 241         u8 previous_byte = 1;
 242         void __iomem *p_temp;
 243         void __iomem *p_max;
 244
 245         if (!smbios_table || !curr)
 246                 return(NULL);
 247
 248         // set p_max to the end of the table
 249         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 250
 251         p_temp = curr;
 252         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 253
 254         while ((p_temp < p_max) && !bail) {
 255                 /* Look for the double NULL terminator
 256                  * The first condition is the previous byte
 257                  * and the second is the curr */
 258                 if (!previous_byte && !(readb(p_temp))) {
 259                         bail = 1;
 260                 }
 261
 262                 previous_byte = readb(p_temp);
 263                 p_temp++;
 264         }
 265
 266         if (p_temp < p_max) {
 267                 return p_temp;
 268         } else {
 269                 return NULL;
 270         }
 271 }
 272
 273
 274 /**
 275  * get_SMBIOS_entry
 276  *
 277  * @type:SMBIOS structure type to be returned
 278  * @previous: %NULL or pointer to previously returned structure
 279  *
 280  * Gets the first entry of the specified type if previous == NULL
 281  * Otherwise, returns the next entry of the given type.
 282  * Uses global SMBIOS Table pointer
 283  * Uses get_subsequent_smbios_entry
 284  *
 285  * returns a pointer to an SMBIOS structure or %NULL if none found
 286  */
 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
 288                                         void __iomem *smbios_table,
 289                                         u8 type,
 290                                         void __iomem *previous)
 291 {
 292         if (!smbios_table)
 293                 return NULL;
 294
 295         if (!previous) {
 296                 previous = smbios_start;
 297         } else {
 298                 previous = get_subsequent_smbios_entry(smbios_start,
 299                                         smbios_table, previous);
 300         }
 301
 302         while (previous) {
 303                 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) {
 304                         previous = get_subsequent_smbios_entry(smbios_start,
 305                                                 smbios_table, previous);
 306                 } else {
 307                         break;
 308                 }
 309         }
 310
 311         return previous;
 312 }
 313
 314 static void release_slot(struct hotplug_slot *hotplug_slot)
 315 {
 316         struct slot *slot = hotplug_slot->private;
 317
 318         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 319
 320         kfree(slot->hotplug_slot->info);
 321         kfree(slot->hotplug_slot->name);
 322         kfree(slot->hotplug_slot);
 323         kfree(slot);
 324 }
 325
 326 static int ctrl_slot_setup(struct controller *ctrl,
 327                         void __iomem *smbios_start,
 328                         void __iomem *smbios_table)
 329 {
 330         struct slot *slot;
 331         struct hotplug_slot *hotplug_slot;
 332         struct hotplug_slot_info *hotplug_slot_info;
 333         u8 number_of_slots;
 334         u8 slot_device;
 335         u8 slot_number;
 336         u8 ctrl_slot;
 337         u32 tempdword;
 338         void __iomem *slot_entry= NULL;
 339         int result = -ENOMEM;
 340
 341         dbg("%s\n", __FUNCTION__);
 342
 343         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 344
 345         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 346         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
 347         slot_number = ctrl->first_slot;
 348
 349         while (number_of_slots) {
 350                 slot = kmalloc(sizeof(*slot), GFP_KERNEL);
 351                 if (!slot)
 352                         goto error;
 353
 354                 memset(slot, 0, sizeof(struct slot));
 355                 slot->hotplug_slot = kmalloc(sizeof(*(slot->hotplug_slot)),
 356                                                 GFP_KERNEL);
 357                 if (!slot->hotplug_slot)
 358                         goto error_slot;
 359                 hotplug_slot = slot->hotplug_slot;
 360                 memset(hotplug_slot, 0, sizeof(struct hotplug_slot));
 361
 362                 hotplug_slot->info =
 363                                 kmalloc(sizeof(*(hotplug_slot->info)),
 364                                                         GFP_KERNEL);
 365                 if (!hotplug_slot->info)
 366                         goto error_hpslot;
 367                 hotplug_slot_info = hotplug_slot->info;
 368                 memset(hotplug_slot_info, 0,
 369                                 sizeof(struct hotplug_slot_info));
 370                 hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
 371
 372                 if (!hotplug_slot->name)
 373                         goto error_info;
 374
 375                 slot->ctrl = ctrl;
 376                 slot->bus = ctrl->bus;
 377                 slot->device = slot_device;
 378                 slot->number = slot_number;
 379                 dbg("slot->number = %d\n", slot->number);
 380
 381                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
 382                                         slot_entry);
 383
 384                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
 385                                 slot->number)) {
 386                         slot_entry = get_SMBIOS_entry(smbios_start,
 387                                                 smbios_table, 9, slot_entry);
 388                 }
 389
 390                 slot->p_sm_slot = slot_entry;
 391
 392                 init_timer(&slot->task_event);
 393                 slot->task_event.expires = jiffies + 5 * HZ;
 394                 slot->task_event.function = cpqhp_pushbutton_thread;
 395
 396                 //FIXME: these capabilities aren't used but if they are
 397                 //       they need to be correctly implemented
 398                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
 399                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
 400
 401                 if (is_slot64bit(slot))
 402                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
 403                 if (is_slot66mhz(slot))
 404                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
 405                 if (ctrl->speed == PCI_SPEED_66MHz)
 406                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
 407
 408                 ctrl_slot =
 409                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
 410
 411                 // Check presence
 412                 slot->capabilities |=
 413                         ((((~tempdword) >> 23) |
 414                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
 415                 // Check the switch state
 416                 slot->capabilities |=
 417                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
 418                 // Check the slot enable
 419                 slot->capabilities |=
 420                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
 421
 422                 /* register this slot with the hotplug pci core */
 423                 hotplug_slot->release = &release_slot;
 424                 hotplug_slot->private = slot;
 425                 make_slot_name(hotplug_slot->name, SLOT_NAME_SIZE, slot);
 426                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
 427
 428                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
 429                 hotplug_slot_info->attention_status =
 430                         cpq_get_attention_status(ctrl, slot);
 431                 hotplug_slot_info->latch_status =
 432                         cpq_get_latch_status(ctrl, slot);
 433                 hotplug_slot_info->adapter_status =
 434                         get_presence_status(ctrl, slot);
 435
 436                 dbg("registering bus %d, dev %d, number %d, "
 437                                 "ctrl->slot_device_offset %d, slot %d\n",
 438                                 slot->bus, slot->device,
 439                                 slot->number, ctrl->slot_device_offset,
 440                                 slot_number);
 441                 result = pci_hp_register(hotplug_slot);
 442                 if (result) {
 443                         err("pci_hp_register failed with error %d\n", result);
 444                         goto error_name;
 445                 }
 446
 447                 slot->next = ctrl->slot;
 448                 ctrl->slot = slot;
 449
 450                 number_of_slots--;
 451                 slot_device++;
 452                 slot_number++;
 453         }
 454
 455         return 0;
 456 error_name:
 457         kfree(hotplug_slot->name);
 458 error_info:
 459         kfree(hotplug_slot_info);
 460 error_hpslot:
 461         kfree(hotplug_slot);
 462 error_slot:
 463         kfree(slot);
 464 error:
 465         return result;
 466 }
 467
 468 static int ctrl_slot_cleanup (struct controller * ctrl)
 469 {
 470         struct slot *old_slot, *next_slot;
 471
 472         old_slot = ctrl->slot;
 473         ctrl->slot = NULL;
 474
 475         while (old_slot) {
 476                 /* memory will be freed by the release_slot callback */
 477                 next_slot = old_slot->next;
 478                 pci_hp_deregister (old_slot->hotplug_slot);
 479                 old_slot = next_slot;
 480         }
 481
 482         cpqhp_remove_debugfs_files(ctrl);
 483
 484         //Free IRQ associated with hot plug device
 485         free_irq(ctrl->interrupt, ctrl);
 486         //Unmap the memory
 487         iounmap(ctrl->hpc_reg);
 488         //Finally reclaim PCI mem
 489         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 490                            pci_resource_len(ctrl->pci_dev, 0));
 491
 492         return(0);
 493 }
 494
 495
 496 //============================================================================
 497 // function:    get_slot_mapping
 498 //
 499 // Description: Attempts to determine a logical slot mapping for a PCI
 500 //              device.  Won't work for more than one PCI-PCI bridge
 501 //              in a slot.
 502 //
 503 // Input:       u8 bus_num - bus number of PCI device
 504 //              u8 dev_num - device number of PCI device
 505 //              u8 *slot - Pointer to u8 where slot number will
 506 //                      be returned
 507 //
 508 // Output:      SUCCESS or FAILURE
 509 //=============================================================================
 510 static int
 511 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 512 {
 513         struct irq_routing_table *PCIIRQRoutingInfoLength;
 514         u32 work;
 515         long len;
 516         long loop;
 517
 518         u8 tbus, tdevice, tslot, bridgeSlot;
 519
 520         dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot);
 521
 522         bridgeSlot = 0xFF;
 523
 524         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
 525         if (!PCIIRQRoutingInfoLength)
 526                 return -1;
 527
 528         len = (PCIIRQRoutingInfoLength->size -
 529                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
 530         // Make sure I got at least one entry
 531         if (len == 0) {
 532                 kfree(PCIIRQRoutingInfoLength);
 533                 return -1;
 534         }
 535
 536         for (loop = 0; loop < len; ++loop) {
 537                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
 538                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
 539                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
 540
 541                 if ((tbus == bus_num) && (tdevice == dev_num)) {
 542                         *slot = tslot;
 543                         kfree(PCIIRQRoutingInfoLength);
 544                         return 0;
 545                 } else {
 546                         /* Did not get a match on the target PCI device. Check
 547                          * if the current IRQ table entry is a PCI-to-PCI bridge
 548                          * device.  If so, and it's secondary bus matches the
 549                          * bus number for the target device, I need to save the
 550                          * bridge's slot number.  If I can not find an entry for
 551                          * the target device, I will have to assume it's on the
 552                          * other side of the bridge, and assign it the bridge's
 553                          * slot. */
 554                         bus->number = tbus;
 555                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 556                                                 PCI_REVISION_ID, &work);
 557
 558                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 559                                 pci_bus_read_config_dword(bus,
 560                                                         PCI_DEVFN(tdevice, 0),
 561                                                         PCI_PRIMARY_BUS, &work);
 562                                 // See if bridge's secondary bus matches target bus.
 563                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
 564                                         bridgeSlot = tslot;
 565                                 }
 566                         }
 567                 }
 568
 569         }
 570
 571         // If we got here, we didn't find an entry in the IRQ mapping table
 572         // for the target PCI device.  If we did determine that the target
 573         // device is on the other side of a PCI-to-PCI bridge, return the
 574         // slot number for the bridge.
 575         if (bridgeSlot != 0xFF) {
 576                 *slot = bridgeSlot;
 577                 kfree(PCIIRQRoutingInfoLength);
 578                 return 0;
 579         }
 580         kfree(PCIIRQRoutingInfoLength);
 581         // Couldn't find an entry in the routing table for this PCI device
 582         return -1;
 583 }
 584
 585
 586 /**
 587  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 588  *
 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         down(&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                 up(&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         up(&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  *
 629  */
 630 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
 631 {
 632         struct pci_func *slot_func;
 633         struct slot *slot = hotplug_slot->private;
 634         struct controller *ctrl = slot->ctrl;
 635         u8 bus;
 636         u8 devfn;
 637         u8 device;
 638         u8 function;
 639
 640         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 641
 642         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 643                 return -ENODEV;
 644
 645         device = devfn >> 3;
 646         function = devfn & 0x7;
 647         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 648
 649         slot_func = cpqhp_slot_find(bus, device, function);
 650         if (!slot_func)
 651                 return -ENODEV;
 652
 653         return cpqhp_set_attention_status(ctrl, slot_func, status);
 654 }
 655
 656
 657 static int process_SI(struct hotplug_slot *hotplug_slot)
 658 {
 659         struct pci_func *slot_func;
 660         struct slot *slot = hotplug_slot->private;
 661         struct controller *ctrl = slot->ctrl;
 662         u8 bus;
 663         u8 devfn;
 664         u8 device;
 665         u8 function;
 666
 667         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 668
 669         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 670                 return -ENODEV;
 671
 672         device = devfn >> 3;
 673         function = devfn & 0x7;
 674         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 675
 676         slot_func = cpqhp_slot_find(bus, device, function);
 677         if (!slot_func)
 678                 return -ENODEV;
 679
 680         slot_func->bus = bus;
 681         slot_func->device = device;
 682         slot_func->function = function;
 683         slot_func->configured = 0;
 684         dbg("board_added(%p, %p)\n", slot_func, ctrl);
 685         return cpqhp_process_SI(ctrl, slot_func);
 686 }
 687
 688
 689 static int process_SS(struct hotplug_slot *hotplug_slot)
 690 {
 691         struct pci_func *slot_func;
 692         struct slot *slot = hotplug_slot->private;
 693         struct controller *ctrl = slot->ctrl;
 694         u8 bus;
 695         u8 devfn;
 696         u8 device;
 697         u8 function;
 698
 699         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 700
 701         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 702                 return -ENODEV;
 703
 704         device = devfn >> 3;
 705         function = devfn & 0x7;
 706         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 707
 708         slot_func = cpqhp_slot_find(bus, device, function);
 709         if (!slot_func)
 710                 return -ENODEV;
 711
 712         dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
 713         return cpqhp_process_SS(ctrl, slot_func);
 714 }
 715
 716
 717 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 718 {
 719         struct slot *slot = hotplug_slot->private;
 720         struct controller *ctrl = slot->ctrl;
 721
 722         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 723
 724         return cpqhp_hardware_test(ctrl, value);
 725 }
 726
 727
 728 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 729 {
 730         struct slot *slot = hotplug_slot->private;
 731         struct controller *ctrl = slot->ctrl;
 732
 733         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 734
 735         *value = get_slot_enabled(ctrl, slot);
 736         return 0;
 737 }
 738
 739 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 740 {
 741         struct slot *slot = hotplug_slot->private;
 742         struct controller *ctrl = slot->ctrl;
 743
 744         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 745
 746         *value = cpq_get_attention_status(ctrl, slot);
 747         return 0;
 748 }
 749
 750 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 751 {
 752         struct slot *slot = hotplug_slot->private;
 753         struct controller *ctrl = slot->ctrl;
 754
 755         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 756
 757         *value = cpq_get_latch_status(ctrl, slot);
 758
 759         return 0;
 760 }
 761
 762 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 763 {
 764         struct slot *slot = hotplug_slot->private;
 765         struct controller *ctrl = slot->ctrl;
 766
 767         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 768
 769         *value = get_presence_status(ctrl, slot);
 770
 771         return 0;
 772 }
 773
 774 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 775 {
 776         struct slot *slot = hotplug_slot->private;
 777         struct controller *ctrl = slot->ctrl;
 778
 779         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 780
 781         *value = ctrl->speed_capability;
 782
 783         return 0;
 784 }
 785
 786 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 787 {
 788         struct slot *slot = hotplug_slot->private;
 789         struct controller *ctrl = slot->ctrl;
 790
 791         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 792
 793         *value = ctrl->speed;
 794
 795         return 0;
 796 }
 797
 798 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 799 {
 800         u8 num_of_slots = 0;
 801         u8 hp_slot = 0;
 802         u8 device;
 803         u8 rev;
 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         rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
 831         dbg("revision: %d\n", rev);
 832         if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) {
 833                 err(msg_HPC_rev_error);
 834                 rc = -ENODEV;
 835                 goto err_disable_device;
 836         }
 837
 838         /* Check for the proper subsytem ID's
 839          * Intel uses a different SSID programming model than Compaq.
 840          * For Intel, each SSID bit identifies a PHP capability.
 841          * Also Intel HPC's may have RID=0.
 842          */
 843         if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
 844                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
 845                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
 846                 if (rc) {
 847                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 848                         goto err_disable_device;
 849                 }
 850                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 851                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 852                         err(msg_HPC_non_compaq_or_intel);
 853                         rc = -ENODEV;
 854                         goto err_disable_device;
 855                 }
 856
 857                 ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL);
 858                 if (!ctrl) {
 859                         err("%s : out of memory\n", __FUNCTION__);
 860                         rc = -ENOMEM;
 861                         goto err_disable_device;
 862                 }
 863                 memset(ctrl, 0, sizeof(struct controller));
 864
 865                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 866                 if (rc) {
 867                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
 868                         goto err_free_ctrl;
 869                 }
 870
 871                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 872
 873                 /* Set Vendor ID, so it can be accessed later from other functions */
 874                 ctrl->vendor_id = vendor_id;
 875
 876                 switch (subsystem_vid) {
 877                         case PCI_VENDOR_ID_COMPAQ:
 878                                 if (rev >= 0x13) { /* CIOBX */
 879                                         ctrl->push_flag = 1;
 880                                         ctrl->slot_switch_type = 1;
 881                                         ctrl->push_button = 1;
 882                                         ctrl->pci_config_space = 1;
 883                                         ctrl->defeature_PHP = 1;
 884                                         ctrl->pcix_support = 1;
 885                                         ctrl->pcix_speed_capability = 1;
 886                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
 887                                         if (bus_cap & 0x80) {
 888                                                 dbg("bus max supports 133MHz PCI-X\n");
 889                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
 890                                                 break;
 891                                         }
 892                                         if (bus_cap & 0x40) {
 893                                                 dbg("bus max supports 100MHz PCI-X\n");
 894                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 895                                                 break;
 896                                         }
 897                                         if (bus_cap & 20) {
 898                                                 dbg("bus max supports 66MHz PCI-X\n");
 899                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
 900                                                 break;
 901                                         }
 902                                         if (bus_cap & 10) {
 903                                                 dbg("bus max supports 66MHz PCI\n");
 904                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 905                                                 break;
 906                                         }
 907
 908                                         break;
 909                                 }
 910
 911                                 switch (subsystem_deviceid) {
 912                                         case PCI_SUB_HPC_ID:
 913                                                 /* Original 6500/7000 implementation */
 914                                                 ctrl->slot_switch_type = 1;
 915                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 916                                                 ctrl->push_button = 0;
 917                                                 ctrl->pci_config_space = 1;
 918                                                 ctrl->defeature_PHP = 1;
 919                                                 ctrl->pcix_support = 0;
 920                                                 ctrl->pcix_speed_capability = 0;
 921                                                 break;
 922                                         case PCI_SUB_HPC_ID2:
 923                                                 /* First Pushbutton implementation */
 924                                                 ctrl->push_flag = 1;
 925                                                 ctrl->slot_switch_type = 1;
 926                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 927                                                 ctrl->push_button = 1;
 928                                                 ctrl->pci_config_space = 1;
 929                                                 ctrl->defeature_PHP = 1;
 930                                                 ctrl->pcix_support = 0;
 931                                                 ctrl->pcix_speed_capability = 0;
 932                                                 break;
 933                                         case PCI_SUB_HPC_ID_INTC:
 934                                                 /* Third party (6500/7000) */
 935                                                 ctrl->slot_switch_type = 1;
 936                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
 937                                                 ctrl->push_button = 0;
 938                                                 ctrl->pci_config_space = 1;
 939                                                 ctrl->defeature_PHP = 1;
 940                                                 ctrl->pcix_support = 0;
 941                                                 ctrl->pcix_speed_capability = 0;
 942                                                 break;
 943                                         case PCI_SUB_HPC_ID3:
 944                                                 /* First 66 Mhz implementation */
 945                                                 ctrl->push_flag = 1;
 946                                                 ctrl->slot_switch_type = 1;
 947                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
 948                                                 ctrl->push_button = 1;
 949                                                 ctrl->pci_config_space = 1;
 950                                                 ctrl->defeature_PHP = 1;
 951                                                 ctrl->pcix_support = 0;
 952                                                 ctrl->pcix_speed_capability = 0;
 953                                                 break;
 954                                         case PCI_SUB_HPC_ID4:
 955                                                 /* First PCI-X implementation, 100MHz */
 956                                                 ctrl->push_flag = 1;
 957                                                 ctrl->slot_switch_type = 1;
 958                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
 959                                                 ctrl->push_button = 1;
 960                                                 ctrl->pci_config_space = 1;
 961                                                 ctrl->defeature_PHP = 1;
 962                                                 ctrl->pcix_support = 1;
 963                                                 ctrl->pcix_speed_capability = 0;
 964                                                 break;
 965                                         default:
 966                                                 err(msg_HPC_not_supported);
 967                                                 rc = -ENODEV;
 968                                                 goto err_free_ctrl;
 969                                 }
 970                                 break;
 971
 972                         case PCI_VENDOR_ID_INTEL:
 973                                 /* Check for speed capability (0=33, 1=66) */
 974                                 if (subsystem_deviceid & 0x0001) {
 975                                         ctrl->speed_capability = PCI_SPEED_66MHz;
 976                                 } else {
 977                                         ctrl->speed_capability = PCI_SPEED_33MHz;
 978                                 }
 979
 980                                 /* Check for push button */
 981                                 if (subsystem_deviceid & 0x0002) {
 982                                         /* no push button */
 983                                         ctrl->push_button = 0;
 984                                 } else {
 985                                         /* push button supported */
 986                                         ctrl->push_button = 1;
 987                                 }
 988
 989                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
 990                                 if (subsystem_deviceid & 0x0004) {
 991                                         /* no switch */
 992                                         ctrl->slot_switch_type = 0;
 993                                 } else {
 994                                         /* switch */
 995                                         ctrl->slot_switch_type = 1;
 996                                 }
 997
 998                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
 999                                 if (subsystem_deviceid & 0x0008) {
1000                                         ctrl->defeature_PHP = 1;        // PHP supported
1001                                 } else {
1002                                         ctrl->defeature_PHP = 0;        // PHP not supported
1003                                 }
1004
1005                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1006                                 if (subsystem_deviceid & 0x0010) {
1007                                         ctrl->alternate_base_address = 1;       // supported
1008                                 } else {
1009                                         ctrl->alternate_base_address = 0;       // not supported
1010                                 }
1011
1012                                 /* PCI Config Space Index (0=not supported, 1=supported) */
1013                                 if (subsystem_deviceid & 0x0020) {
1014                                         ctrl->pci_config_space = 1;             // supported
1015                                 } else {
1016                                         ctrl->pci_config_space = 0;             // not supported
1017                                 }
1018
1019                                 /* PCI-X support */
1020                                 if (subsystem_deviceid & 0x0080) {
1021                                         /* PCI-X capable */
1022                                         ctrl->pcix_support = 1;
1023                                         /* Frequency of operation in PCI-X mode */
1024                                         if (subsystem_deviceid & 0x0040) {
1025                                                 /* 133MHz PCI-X if bit 7 is 1 */
1026                                                 ctrl->pcix_speed_capability = 1;
1027                                         } else {
1028                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1029                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1030                                                 ctrl->pcix_speed_capability = 0;
1031                                         }
1032                                 } else {
1033                                         /* Conventional PCI */
1034                                         ctrl->pcix_support = 0;
1035                                         ctrl->pcix_speed_capability = 0;
1036                                 }
1037                                 break;
1038
1039                         default:
1040                                 err(msg_HPC_not_supported);
1041                                 rc = -ENODEV;
1042                                 goto err_free_ctrl;
1043                 }
1044
1045         } else {
1046                 err(msg_HPC_not_supported);
1047                 return -ENODEV;
1048         }
1049
1050         // Tell the user that we found one.
1051         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1052                                         pdev->bus->number);
1053
1054         dbg("Hotplug controller capabilities:\n");
1055         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1056         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1057                                         "switch present" : "no switch");
1058         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1059                                         "PHP supported" : "PHP not supported");
1060         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1061                                         "supported" : "not supported");
1062         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1063                                         "supported" : "not supported");
1064         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1065                                         "supported" : "not supported");
1066         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1067                                         "supported" : "not supported");
1068
1069         ctrl->pci_dev = pdev;
1070         pci_set_drvdata(pdev, ctrl);
1071
1072         /* make our own copy of the pci bus structure,
1073          * as we like tweaking it a lot */
1074         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1075         if (!ctrl->pci_bus) {
1076                 err("out of memory\n");
1077                 rc = -ENOMEM;
1078                 goto err_free_ctrl;
1079         }
1080         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1081
1082         ctrl->bus = pdev->bus->number;
1083         ctrl->rev = rev;
1084         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1085                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1086
1087         init_MUTEX(&ctrl->crit_sect);
1088         init_waitqueue_head(&ctrl->queue);
1089
1090         /* initialize our threads if they haven't already been started up */
1091         rc = one_time_init();
1092         if (rc) {
1093                 goto err_free_bus;
1094         }
1095
1096         dbg("pdev = %p\n", pdev);
1097         dbg("pci resource start %lx\n", pci_resource_start(pdev, 0));
1098         dbg("pci resource len %lx\n", pci_resource_len(pdev, 0));
1099
1100         if (!request_mem_region(pci_resource_start(pdev, 0),
1101                                 pci_resource_len(pdev, 0), MY_NAME)) {
1102                 err("cannot reserve MMIO region\n");
1103                 rc = -ENOMEM;
1104                 goto err_free_bus;
1105         }
1106
1107         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1108                                         pci_resource_len(pdev, 0));
1109         if (!ctrl->hpc_reg) {
1110                 err("cannot remap MMIO region %lx @ %lx\n",
1111                                 pci_resource_len(pdev, 0),
1112                                 pci_resource_start(pdev, 0));
1113                 rc = -ENODEV;
1114                 goto err_free_mem_region;
1115         }
1116
1117         // Check for 66Mhz operation
1118         ctrl->speed = get_controller_speed(ctrl);
1119
1120
1121         /********************************************************
1122          *
1123          *              Save configuration headers for this and
1124          *              subordinate PCI buses
1125          *
1126          ********************************************************/
1127
1128         // find the physical slot number of the first hot plug slot
1129
1130         /* Get slot won't work for devices behind bridges, but
1131          * in this case it will always be called for the "base"
1132          * bus/dev/func of a slot.
1133          * CS: this is leveraging the PCIIRQ routing code from the kernel
1134          * (pci-pc.c: get_irq_routing_table) */
1135         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1136                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1137                                 &(ctrl->first_slot));
1138         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1139                                 ctrl->first_slot, rc);
1140         if (rc) {
1141                 err(msg_initialization_err, rc);
1142                 goto err_iounmap;
1143         }
1144
1145         // Store PCI Config Space for all devices on this bus
1146         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1147         if (rc) {
1148                 err("%s: unable to save PCI configuration data, error %d\n",
1149                                 __FUNCTION__, rc);
1150                 goto err_iounmap;
1151         }
1152
1153         /*
1154          * Get IO, memory, and IRQ resources for new devices
1155          */
1156         // The next line is required for cpqhp_find_available_resources
1157         ctrl->interrupt = pdev->irq;
1158         if (ctrl->interrupt < 0x10) {
1159                 cpqhp_legacy_mode = 1;
1160                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1161         }
1162
1163         ctrl->cfgspc_irq = 0;
1164         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1165
1166         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1167         ctrl->add_support = !rc;
1168         if (rc) {
1169                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1170                 err("unable to locate PCI configuration resources for hot plug add.\n");
1171                 goto err_iounmap;
1172         }
1173
1174         /*
1175          * Finish setting up the hot plug ctrl device
1176          */
1177         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1178         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1179
1180         ctrl->next_event = 0;
1181
1182         /* Setup the slot information structures */
1183         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1184         if (rc) {
1185                 err(msg_initialization_err, 6);
1186                 err("%s: unable to save PCI configuration data, error %d\n",
1187                         __FUNCTION__, rc);
1188                 goto err_iounmap;
1189         }
1190
1191         /* Mask all general input interrupts */
1192         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1193
1194         /* set up the interrupt */
1195         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1196         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1197                         SA_SHIRQ, MY_NAME, ctrl)) {
1198                 err("Can't get irq %d for the hotplug pci controller\n",
1199                         ctrl->interrupt);
1200                 rc = -ENODEV;
1201                 goto err_iounmap;
1202         }
1203
1204         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1205         temp_word = readw(ctrl->hpc_reg + MISC);
1206         temp_word |= 0x4006;
1207         writew(temp_word, ctrl->hpc_reg + MISC);
1208
1209         // Changed 05/05/97 to clear all interrupts at start
1210         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1211
1212         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1213
1214         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1215
1216         if (!cpqhp_ctrl_list) {
1217                 cpqhp_ctrl_list = ctrl;
1218                 ctrl->next = NULL;
1219         } else {
1220                 ctrl->next = cpqhp_ctrl_list;
1221                 cpqhp_ctrl_list = ctrl;
1222         }
1223
1224         // turn off empty slots here unless command line option "ON" set
1225         // Wait for exclusive access to hardware
1226         down(&ctrl->crit_sect);
1227
1228         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1229
1230         // find first device number for the ctrl
1231         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1232
1233         while (num_of_slots) {
1234                 dbg("num_of_slots: %d\n", num_of_slots);
1235                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1236                 if (!func)
1237                         break;
1238
1239                 hp_slot = func->device - ctrl->slot_device_offset;
1240                 dbg("hp_slot: %d\n", hp_slot);
1241
1242                 // We have to save the presence info for these slots
1243                 temp_word = ctrl->ctrl_int_comp >> 16;
1244                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1245                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1246
1247                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1248                         func->switch_save = 0;
1249                 } else {
1250                         func->switch_save = 0x10;
1251                 }
1252
1253                 if (!power_mode) {
1254                         if (!func->is_a_board) {
1255                                 green_LED_off(ctrl, hp_slot);
1256                                 slot_disable(ctrl, hp_slot);
1257                         }
1258                 }
1259
1260                 device++;
1261                 num_of_slots--;
1262         }
1263
1264         if (!power_mode) {
1265                 set_SOGO(ctrl);
1266                 // Wait for SOBS to be unset
1267                 wait_for_ctrl_irq(ctrl);
1268         }
1269
1270         rc = init_SERR(ctrl);
1271         if (rc) {
1272                 err("init_SERR failed\n");
1273                 up(&ctrl->crit_sect);
1274                 goto err_free_irq;
1275         }
1276
1277         // Done with exclusive hardware access
1278         up(&ctrl->crit_sect);
1279
1280         cpqhp_create_debugfs_files(ctrl);
1281
1282         return 0;
1283
1284 err_free_irq:
1285         free_irq(ctrl->interrupt, ctrl);
1286 err_iounmap:
1287         iounmap(ctrl->hpc_reg);
1288 err_free_mem_region:
1289         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1290 err_free_bus:
1291         kfree(ctrl->pci_bus);
1292 err_free_ctrl:
1293         kfree(ctrl);
1294 err_disable_device:
1295         pci_disable_device(pdev);
1296         return rc;
1297 }
1298
1299
1300 static int one_time_init(void)
1301 {
1302         int loop;
1303         int retval = 0;
1304
1305         if (initialized)
1306                 return 0;
1307
1308         power_mode = 0;
1309
1310         retval = pci_print_IRQ_route();
1311         if (retval)
1312                 goto error;
1313
1314         dbg("Initialize + Start the notification mechanism \n");
1315
1316         retval = cpqhp_event_start_thread();
1317         if (retval)
1318                 goto error;
1319
1320         dbg("Initialize slot lists\n");
1321         for (loop = 0; loop < 256; loop++) {
1322                 cpqhp_slot_list[loop] = NULL;
1323         }
1324
1325         // FIXME: We also need to hook the NMI handler eventually.
1326         // this also needs to be worked with Christoph
1327         // register_NMI_handler();
1328
1329         // Map rom address
1330         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1331         if (!cpqhp_rom_start) {
1332                 err ("Could not ioremap memory region for ROM\n");
1333                 retval = -EIO;
1334                 goto error;
1335         }
1336
1337         /* Now, map the int15 entry point if we are on compaq specific hardware */
1338         compaq_nvram_init(cpqhp_rom_start);
1339
1340         /* Map smbios table entry point structure */
1341         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1342                                         cpqhp_rom_start + ROM_PHY_LEN);
1343         if (!smbios_table) {
1344                 err ("Could not find the SMBIOS pointer in memory\n");
1345                 retval = -EIO;
1346                 goto error_rom_start;
1347         }
1348
1349         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1350                                         readw(smbios_table + ST_LENGTH));
1351         if (!smbios_start) {
1352                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1353                 retval = -EIO;
1354                 goto error_smbios_start;
1355         }
1356
1357         initialized = 1;
1358
1359         return retval;
1360
1361 error_smbios_start:
1362         iounmap(smbios_start);
1363 error_rom_start:
1364         iounmap(cpqhp_rom_start);
1365 error:
1366         return retval;
1367 }
1368
1369
1370 static void __exit unload_cpqphpd(void)
1371 {
1372         struct pci_func *next;
1373         struct pci_func *TempSlot;
1374         int loop;
1375         u32 rc;
1376         struct controller *ctrl;
1377         struct controller *tctrl;
1378         struct pci_resource *res;
1379         struct pci_resource *tres;
1380
1381         rc = compaq_nvram_store(cpqhp_rom_start);
1382
1383         ctrl = cpqhp_ctrl_list;
1384
1385         while (ctrl) {
1386                 if (ctrl->hpc_reg) {
1387                         u16 misc;
1388                         rc = read_slot_enable (ctrl);
1389
1390                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1391                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1392
1393                         misc = readw(ctrl->hpc_reg + MISC);
1394                         misc &= 0xFFFD;
1395                         writew(misc, ctrl->hpc_reg + MISC);
1396                 }
1397
1398                 ctrl_slot_cleanup(ctrl);
1399
1400                 res = ctrl->io_head;
1401                 while (res) {
1402                         tres = res;
1403                         res = res->next;
1404                         kfree(tres);
1405                 }
1406
1407                 res = ctrl->mem_head;
1408                 while (res) {
1409                         tres = res;
1410                         res = res->next;
1411                         kfree(tres);
1412                 }
1413
1414                 res = ctrl->p_mem_head;
1415                 while (res) {
1416                         tres = res;
1417                         res = res->next;
1418                         kfree(tres);
1419                 }
1420
1421                 res = ctrl->bus_head;
1422                 while (res) {
1423                         tres = res;
1424                         res = res->next;
1425                         kfree(tres);
1426                 }
1427
1428                 kfree (ctrl->pci_bus);
1429
1430                 tctrl = ctrl;
1431                 ctrl = ctrl->next;
1432                 kfree(tctrl);
1433         }
1434
1435         for (loop = 0; loop < 256; loop++) {
1436                 next = cpqhp_slot_list[loop];
1437                 while (next != NULL) {
1438                         res = next->io_head;
1439                         while (res) {
1440                                 tres = res;
1441                                 res = res->next;
1442                                 kfree(tres);
1443                         }
1444
1445                         res = next->mem_head;
1446                         while (res) {
1447                                 tres = res;
1448                                 res = res->next;
1449                                 kfree(tres);
1450                         }
1451
1452                         res = next->p_mem_head;
1453                         while (res) {
1454                                 tres = res;
1455                                 res = res->next;
1456                                 kfree(tres);
1457                         }
1458
1459                         res = next->bus_head;
1460                         while (res) {
1461                                 tres = res;
1462                                 res = res->next;
1463                                 kfree(tres);
1464                         }
1465
1466                         TempSlot = next;
1467                         next = next->next;
1468                         kfree(TempSlot);
1469                 }
1470         }
1471
1472         // Stop the notification mechanism
1473         if (initialized)
1474                 cpqhp_event_stop_thread();
1475
1476         //unmap the rom address
1477         if (cpqhp_rom_start)
1478                 iounmap(cpqhp_rom_start);
1479         if (smbios_start)
1480                 iounmap(smbios_start);
1481 }
1482
1483
1484
1485 static struct pci_device_id hpcd_pci_tbl[] = {
1486         {
1487         /* handle any PCI Hotplug controller */
1488         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1489         .class_mask =   ~0,
1490
1491         /* no matter who makes it */
1492         .vendor =       PCI_ANY_ID,
1493         .device =       PCI_ANY_ID,
1494         .subvendor =    PCI_ANY_ID,
1495         .subdevice =    PCI_ANY_ID,
1496
1497         }, { /* end: all zeroes */ }
1498 };
1499
1500 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1501
1502
1503
1504 static struct pci_driver cpqhpc_driver = {
1505         .name =         "compaq_pci_hotplug",
1506         .id_table =     hpcd_pci_tbl,
1507         .probe =        cpqhpc_probe,
1508         /* remove:      cpqhpc_remove_one, */
1509 };
1510
1511
1512
1513 static int __init cpqhpc_init(void)
1514 {
1515         int result;
1516
1517         cpqhp_debug = debug;
1518
1519         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1520         cpqhp_initialize_debugfs();
1521         result = pci_register_driver(&cpqhpc_driver);
1522         dbg("pci_register_driver = %d\n", result);
1523         return result;
1524 }
1525
1526
1527 static void __exit cpqhpc_cleanup(void)
1528 {
1529         dbg("unload_cpqphpd()\n");
1530         unload_cpqphpd();
1531
1532         dbg("pci_unregister_driver\n");
1533         pci_unregister_driver(&cpqhpc_driver);
1534         cpqhp_shutdown_debugfs();
1535 }
1536
1537
1538 module_init(cpqhpc_init);
1539 module_exit(cpqhpc_cleanup);
1540
1541