linux/drivers/pci/hotplug/cpqphp_core.c
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   1/*
   2 * Compaq Hot Plug Controller Driver
   3 *
   4 * Copyright (C) 1995,2001 Compaq Computer Corporation
   5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>
   6 * Copyright (C) 2001 IBM Corp.
   7 *
   8 * All rights reserved.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or (at
  13 * your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful, but
  16 * WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18 * NON INFRINGEMENT.  See the GNU General Public License for more
  19 * details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 *
  25 * Send feedback to <greg@kroah.com>
  26 *
  27 * Jan 12, 2003 -       Added 66/100/133MHz PCI-X support,
  28 *                      Torben Mathiasen <torben.mathiasen@hp.com>
  29 */
  30
  31#include <linux/module.h>
  32#include <linux/moduleparam.h>
  33#include <linux/kernel.h>
  34#include <linux/types.h>
  35#include <linux/proc_fs.h>
  36#include <linux/slab.h>
  37#include <linux/workqueue.h>
  38#include <linux/pci.h>
  39#include <linux/pci_hotplug.h>
  40#include <linux/init.h>
  41#include <linux/interrupt.h>
  42
  43#include <linux/uaccess.h>
  44
  45#include "cpqphp.h"
  46#include "cpqphp_nvram.h"
  47
  48
  49/* Global variables */
  50int cpqhp_debug;
  51int cpqhp_legacy_mode;
  52struct controller *cpqhp_ctrl_list;     /* = NULL */
  53struct pci_func *cpqhp_slot_list[256];
  54struct irq_routing_table *cpqhp_routing_table;
  55
  56/* local variables */
  57static void __iomem *smbios_table;
  58static void __iomem *smbios_start;
  59static void __iomem *cpqhp_rom_start;
  60static bool power_mode;
  61static bool debug;
  62static int initialized;
  63
  64#define DRIVER_VERSION  "0.9.8"
  65#define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
  66#define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
  67
  68MODULE_AUTHOR(DRIVER_AUTHOR);
  69MODULE_DESCRIPTION(DRIVER_DESC);
  70MODULE_LICENSE("GPL");
  71
  72module_param(power_mode, bool, 0644);
  73MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
  74
  75module_param(debug, bool, 0644);
  76MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
  77
  78#define CPQHPC_MODULE_MINOR 208
  79
  80static inline int is_slot64bit(struct slot *slot)
  81{
  82        return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
  83}
  84
  85static inline int is_slot66mhz(struct slot *slot)
  86{
  87        return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
  88}
  89
  90/**
  91 * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
  92 * @begin: begin pointer for region to be scanned.
  93 * @end: end pointer for region to be scanned.
  94 *
  95 * Returns pointer to the head of the SMBIOS tables (or %NULL).
  96 */
  97static void __iomem *detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
  98{
  99        void __iomem *fp;
 100        void __iomem *endp;
 101        u8 temp1, temp2, temp3, temp4;
 102        int status = 0;
 103
 104        endp = (end - sizeof(u32) + 1);
 105
 106        for (fp = begin; fp <= endp; fp += 16) {
 107                temp1 = readb(fp);
 108                temp2 = readb(fp+1);
 109                temp3 = readb(fp+2);
 110                temp4 = readb(fp+3);
 111                if (temp1 == '_' &&
 112                    temp2 == 'S' &&
 113                    temp3 == 'M' &&
 114                    temp4 == '_') {
 115                        status = 1;
 116                        break;
 117                }
 118        }
 119
 120        if (!status)
 121                fp = NULL;
 122
 123        dbg("Discovered SMBIOS Entry point at %p\n", fp);
 124
 125        return fp;
 126}
 127
 128/**
 129 * init_SERR - Initializes the per slot SERR generation.
 130 * @ctrl: controller to use
 131 *
 132 * For unexpected switch opens
 133 */
 134static int init_SERR(struct controller *ctrl)
 135{
 136        u32 tempdword;
 137        u32 number_of_slots;
 138        u8 physical_slot;
 139
 140        if (!ctrl)
 141                return 1;
 142
 143        tempdword = ctrl->first_slot;
 144
 145        number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 146        /* Loop through slots */
 147        while (number_of_slots) {
 148                physical_slot = tempdword;
 149                writeb(0, ctrl->hpc_reg + SLOT_SERR);
 150                tempdword++;
 151                number_of_slots--;
 152        }
 153
 154        return 0;
 155}
 156
 157static int init_cpqhp_routing_table(void)
 158{
 159        int len;
 160
 161        cpqhp_routing_table = pcibios_get_irq_routing_table();
 162        if (cpqhp_routing_table == NULL)
 163                return -ENOMEM;
 164
 165        len = cpqhp_routing_table_length();
 166        if (len == 0) {
 167                kfree(cpqhp_routing_table);
 168                cpqhp_routing_table = NULL;
 169                return -1;
 170        }
 171
 172        return 0;
 173}
 174
 175/* nice debugging output */
 176static void pci_print_IRQ_route(void)
 177{
 178        int len;
 179        int loop;
 180        u8 tbus, tdevice, tslot;
 181
 182        len = cpqhp_routing_table_length();
 183
 184        dbg("bus dev func slot\n");
 185        for (loop = 0; loop < len; ++loop) {
 186                tbus = cpqhp_routing_table->slots[loop].bus;
 187                tdevice = cpqhp_routing_table->slots[loop].devfn;
 188                tslot = cpqhp_routing_table->slots[loop].slot;
 189                dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
 190
 191        }
 192        return;
 193}
 194
 195
 196/**
 197 * get_subsequent_smbios_entry: get the next entry from bios table.
 198 * @smbios_start: where to start in the SMBIOS table
 199 * @smbios_table: location of the SMBIOS table
 200 * @curr: %NULL or pointer to previously returned structure
 201 *
 202 * Gets the first entry if previous == NULL;
 203 * otherwise, returns the next entry.
 204 * Uses global SMBIOS Table pointer.
 205 *
 206 * Returns a pointer to an SMBIOS structure or NULL if none found.
 207 */
 208static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
 209                                                void __iomem *smbios_table,
 210                                                void __iomem *curr)
 211{
 212        u8 bail = 0;
 213        u8 previous_byte = 1;
 214        void __iomem *p_temp;
 215        void __iomem *p_max;
 216
 217        if (!smbios_table || !curr)
 218                return NULL;
 219
 220        /* set p_max to the end of the table */
 221        p_max = smbios_start + readw(smbios_table + ST_LENGTH);
 222
 223        p_temp = curr;
 224        p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
 225
 226        while ((p_temp < p_max) && !bail) {
 227                /* Look for the double NULL terminator
 228                 * The first condition is the previous byte
 229                 * and the second is the curr
 230                 */
 231                if (!previous_byte && !(readb(p_temp)))
 232                        bail = 1;
 233
 234                previous_byte = readb(p_temp);
 235                p_temp++;
 236        }
 237
 238        if (p_temp < p_max)
 239                return p_temp;
 240        else
 241                return NULL;
 242}
 243
 244
 245/**
 246 * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
 247 * @smbios_start: where to start in the SMBIOS table
 248 * @smbios_table: location of the SMBIOS table
 249 * @type: SMBIOS structure type to be returned
 250 * @previous: %NULL or pointer to previously returned structure
 251 *
 252 * Gets the first entry of the specified type if previous == %NULL;
 253 * Otherwise, returns the next entry of the given type.
 254 * Uses global SMBIOS Table pointer.
 255 * Uses get_subsequent_smbios_entry.
 256 *
 257 * Returns a pointer to an SMBIOS structure or %NULL if none found.
 258 */
 259static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
 260                                        void __iomem *smbios_table,
 261                                        u8 type,
 262                                        void __iomem *previous)
 263{
 264        if (!smbios_table)
 265                return NULL;
 266
 267        if (!previous)
 268                previous = smbios_start;
 269        else
 270                previous = get_subsequent_smbios_entry(smbios_start,
 271                                        smbios_table, previous);
 272
 273        while (previous)
 274                if (readb(previous + SMBIOS_GENERIC_TYPE) != type)
 275                        previous = get_subsequent_smbios_entry(smbios_start,
 276                                                smbios_table, previous);
 277                else
 278                        break;
 279
 280        return previous;
 281}
 282
 283static void release_slot(struct hotplug_slot *hotplug_slot)
 284{
 285        struct slot *slot = hotplug_slot->private;
 286
 287        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 288
 289        kfree(slot->hotplug_slot->info);
 290        kfree(slot->hotplug_slot);
 291        kfree(slot);
 292}
 293
 294static int ctrl_slot_cleanup(struct controller *ctrl)
 295{
 296        struct slot *old_slot, *next_slot;
 297
 298        old_slot = ctrl->slot;
 299        ctrl->slot = NULL;
 300
 301        while (old_slot) {
 302                /* memory will be freed by the release_slot callback */
 303                next_slot = old_slot->next;
 304                pci_hp_deregister(old_slot->hotplug_slot);
 305                old_slot = next_slot;
 306        }
 307
 308        cpqhp_remove_debugfs_files(ctrl);
 309
 310        /* Free IRQ associated with hot plug device */
 311        free_irq(ctrl->interrupt, ctrl);
 312        /* Unmap the memory */
 313        iounmap(ctrl->hpc_reg);
 314        /* Finally reclaim PCI mem */
 315        release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
 316                           pci_resource_len(ctrl->pci_dev, 0));
 317
 318        return 0;
 319}
 320
 321
 322/**
 323 * get_slot_mapping - determine logical slot mapping for PCI device
 324 *
 325 * Won't work for more than one PCI-PCI bridge in a slot.
 326 *
 327 * @bus_num - bus number of PCI device
 328 * @dev_num - device number of PCI device
 329 * @slot - Pointer to u8 where slot number will be returned
 330 *
 331 * Output:      SUCCESS or FAILURE
 332 */
 333static int
 334get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
 335{
 336        u32 work;
 337        long len;
 338        long loop;
 339
 340        u8 tbus, tdevice, tslot, bridgeSlot;
 341
 342        dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
 343
 344        bridgeSlot = 0xFF;
 345
 346        len = cpqhp_routing_table_length();
 347        for (loop = 0; loop < len; ++loop) {
 348                tbus = cpqhp_routing_table->slots[loop].bus;
 349                tdevice = cpqhp_routing_table->slots[loop].devfn >> 3;
 350                tslot = cpqhp_routing_table->slots[loop].slot;
 351
 352                if ((tbus == bus_num) && (tdevice == dev_num)) {
 353                        *slot = tslot;
 354                        return 0;
 355                } else {
 356                        /* Did not get a match on the target PCI device. Check
 357                         * if the current IRQ table entry is a PCI-to-PCI
 358                         * bridge device.  If so, and it's secondary bus
 359                         * matches the bus number for the target device, I need
 360                         * to save the bridge's slot number.  If I can not find
 361                         * an entry for the target device, I will have to
 362                         * assume it's on the other side of the bridge, and
 363                         * assign it the bridge's slot.
 364                         */
 365                        bus->number = tbus;
 366                        pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
 367                                                PCI_CLASS_REVISION, &work);
 368
 369                        if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
 370                                pci_bus_read_config_dword(bus,
 371                                                        PCI_DEVFN(tdevice, 0),
 372                                                        PCI_PRIMARY_BUS, &work);
 373                                // See if bridge's secondary bus matches target bus.
 374                                if (((work >> 8) & 0x000000FF) == (long) bus_num)
 375                                        bridgeSlot = tslot;
 376                        }
 377                }
 378
 379        }
 380
 381        /* If we got here, we didn't find an entry in the IRQ mapping table for
 382         * the target PCI device.  If we did determine that the target device
 383         * is on the other side of a PCI-to-PCI bridge, return the slot number
 384         * for the bridge.
 385         */
 386        if (bridgeSlot != 0xFF) {
 387                *slot = bridgeSlot;
 388                return 0;
 389        }
 390        /* Couldn't find an entry in the routing table for this PCI device */
 391        return -1;
 392}
 393
 394
 395/**
 396 * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
 397 * @ctrl: struct controller to use
 398 * @func: PCI device/function info
 399 * @status: LED control flag: 1 = LED on, 0 = LED off
 400 */
 401static int
 402cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
 403                                u32 status)
 404{
 405        u8 hp_slot;
 406
 407        if (func == NULL)
 408                return 1;
 409
 410        hp_slot = func->device - ctrl->slot_device_offset;
 411
 412        /* Wait for exclusive access to hardware */
 413        mutex_lock(&ctrl->crit_sect);
 414
 415        if (status == 1)
 416                amber_LED_on(ctrl, hp_slot);
 417        else if (status == 0)
 418                amber_LED_off(ctrl, hp_slot);
 419        else {
 420                /* Done with exclusive hardware access */
 421                mutex_unlock(&ctrl->crit_sect);
 422                return 1;
 423        }
 424
 425        set_SOGO(ctrl);
 426
 427        /* Wait for SOBS to be unset */
 428        wait_for_ctrl_irq(ctrl);
 429
 430        /* Done with exclusive hardware access */
 431        mutex_unlock(&ctrl->crit_sect);
 432
 433        return 0;
 434}
 435
 436
 437/**
 438 * set_attention_status - Turns the Amber LED for a slot on or off
 439 * @hotplug_slot: slot to change LED on
 440 * @status: LED control flag
 441 */
 442static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
 443{
 444        struct pci_func *slot_func;
 445        struct slot *slot = hotplug_slot->private;
 446        struct controller *ctrl = slot->ctrl;
 447        u8 bus;
 448        u8 devfn;
 449        u8 device;
 450        u8 function;
 451
 452        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 453
 454        if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 455                return -ENODEV;
 456
 457        device = devfn >> 3;
 458        function = devfn & 0x7;
 459        dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 460
 461        slot_func = cpqhp_slot_find(bus, device, function);
 462        if (!slot_func)
 463                return -ENODEV;
 464
 465        return cpqhp_set_attention_status(ctrl, slot_func, status);
 466}
 467
 468
 469static int process_SI(struct hotplug_slot *hotplug_slot)
 470{
 471        struct pci_func *slot_func;
 472        struct slot *slot = hotplug_slot->private;
 473        struct controller *ctrl = slot->ctrl;
 474        u8 bus;
 475        u8 devfn;
 476        u8 device;
 477        u8 function;
 478
 479        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 480
 481        if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 482                return -ENODEV;
 483
 484        device = devfn >> 3;
 485        function = devfn & 0x7;
 486        dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 487
 488        slot_func = cpqhp_slot_find(bus, device, function);
 489        if (!slot_func)
 490                return -ENODEV;
 491
 492        slot_func->bus = bus;
 493        slot_func->device = device;
 494        slot_func->function = function;
 495        slot_func->configured = 0;
 496        dbg("board_added(%p, %p)\n", slot_func, ctrl);
 497        return cpqhp_process_SI(ctrl, slot_func);
 498}
 499
 500
 501static int process_SS(struct hotplug_slot *hotplug_slot)
 502{
 503        struct pci_func *slot_func;
 504        struct slot *slot = hotplug_slot->private;
 505        struct controller *ctrl = slot->ctrl;
 506        u8 bus;
 507        u8 devfn;
 508        u8 device;
 509        u8 function;
 510
 511        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 512
 513        if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
 514                return -ENODEV;
 515
 516        device = devfn >> 3;
 517        function = devfn & 0x7;
 518        dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
 519
 520        slot_func = cpqhp_slot_find(bus, device, function);
 521        if (!slot_func)
 522                return -ENODEV;
 523
 524        dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
 525        return cpqhp_process_SS(ctrl, slot_func);
 526}
 527
 528
 529static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
 530{
 531        struct slot *slot = hotplug_slot->private;
 532        struct controller *ctrl = slot->ctrl;
 533
 534        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 535
 536        return cpqhp_hardware_test(ctrl, value);
 537}
 538
 539
 540static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 541{
 542        struct slot *slot = hotplug_slot->private;
 543        struct controller *ctrl = slot->ctrl;
 544
 545        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 546
 547        *value = get_slot_enabled(ctrl, slot);
 548        return 0;
 549}
 550
 551static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 552{
 553        struct slot *slot = hotplug_slot->private;
 554        struct controller *ctrl = slot->ctrl;
 555
 556        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 557
 558        *value = cpq_get_attention_status(ctrl, slot);
 559        return 0;
 560}
 561
 562static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 563{
 564        struct slot *slot = hotplug_slot->private;
 565        struct controller *ctrl = slot->ctrl;
 566
 567        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 568
 569        *value = cpq_get_latch_status(ctrl, slot);
 570
 571        return 0;
 572}
 573
 574static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 575{
 576        struct slot *slot = hotplug_slot->private;
 577        struct controller *ctrl = slot->ctrl;
 578
 579        dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
 580
 581        *value = get_presence_status(ctrl, slot);
 582
 583        return 0;
 584}
 585
 586static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
 587        .set_attention_status = set_attention_status,
 588        .enable_slot =          process_SI,
 589        .disable_slot =         process_SS,
 590        .hardware_test =        hardware_test,
 591        .get_power_status =     get_power_status,
 592        .get_attention_status = get_attention_status,
 593        .get_latch_status =     get_latch_status,
 594        .get_adapter_status =   get_adapter_status,
 595};
 596
 597#define SLOT_NAME_SIZE 10
 598
 599static int ctrl_slot_setup(struct controller *ctrl,
 600                        void __iomem *smbios_start,
 601                        void __iomem *smbios_table)
 602{
 603        struct slot *slot;
 604        struct hotplug_slot *hotplug_slot;
 605        struct hotplug_slot_info *hotplug_slot_info;
 606        struct pci_bus *bus = ctrl->pci_bus;
 607        u8 number_of_slots;
 608        u8 slot_device;
 609        u8 slot_number;
 610        u8 ctrl_slot;
 611        u32 tempdword;
 612        char name[SLOT_NAME_SIZE];
 613        void __iomem *slot_entry = NULL;
 614        int result;
 615
 616        dbg("%s\n", __func__);
 617
 618        tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
 619
 620        number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
 621        slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
 622        slot_number = ctrl->first_slot;
 623
 624        while (number_of_slots) {
 625                slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 626                if (!slot) {
 627                        result = -ENOMEM;
 628                        goto error;
 629                }
 630
 631                slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
 632                                                GFP_KERNEL);
 633                if (!slot->hotplug_slot) {
 634                        result = -ENOMEM;
 635                        goto error_slot;
 636                }
 637                hotplug_slot = slot->hotplug_slot;
 638
 639                hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)),
 640                                                        GFP_KERNEL);
 641                if (!hotplug_slot->info) {
 642                        result = -ENOMEM;
 643                        goto error_hpslot;
 644                }
 645                hotplug_slot_info = hotplug_slot->info;
 646
 647                slot->ctrl = ctrl;
 648                slot->bus = ctrl->bus;
 649                slot->device = slot_device;
 650                slot->number = slot_number;
 651                dbg("slot->number = %u\n", slot->number);
 652
 653                slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
 654                                        slot_entry);
 655
 656                while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
 657                                slot->number)) {
 658                        slot_entry = get_SMBIOS_entry(smbios_start,
 659                                                smbios_table, 9, slot_entry);
 660                }
 661
 662                slot->p_sm_slot = slot_entry;
 663
 664                init_timer(&slot->task_event);
 665                slot->task_event.expires = jiffies + 5 * HZ;
 666                slot->task_event.function = cpqhp_pushbutton_thread;
 667
 668                /*FIXME: these capabilities aren't used but if they are
 669                 *       they need to be correctly implemented
 670                 */
 671                slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
 672                slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
 673
 674                if (is_slot64bit(slot))
 675                        slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
 676                if (is_slot66mhz(slot))
 677                        slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
 678                if (bus->cur_bus_speed == PCI_SPEED_66MHz)
 679                        slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
 680
 681                ctrl_slot =
 682                        slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
 683
 684                /* Check presence */
 685                slot->capabilities |=
 686                        ((((~tempdword) >> 23) |
 687                         ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
 688                /* Check the switch state */
 689                slot->capabilities |=
 690                        ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
 691                /* Check the slot enable */
 692                slot->capabilities |=
 693                        ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
 694
 695                /* register this slot with the hotplug pci core */
 696                hotplug_slot->release = &release_slot;
 697                hotplug_slot->private = slot;
 698                snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
 699                hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
 700
 701                hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
 702                hotplug_slot_info->attention_status =
 703                        cpq_get_attention_status(ctrl, slot);
 704                hotplug_slot_info->latch_status =
 705                        cpq_get_latch_status(ctrl, slot);
 706                hotplug_slot_info->adapter_status =
 707                        get_presence_status(ctrl, slot);
 708
 709                dbg("registering bus %d, dev %d, number %d, ctrl->slot_device_offset %d, slot %d\n",
 710                                slot->bus, slot->device,
 711                                slot->number, ctrl->slot_device_offset,
 712                                slot_number);
 713                result = pci_hp_register(hotplug_slot,
 714                                         ctrl->pci_dev->bus,
 715                                         slot->device,
 716                                         name);
 717                if (result) {
 718                        err("pci_hp_register failed with error %d\n", result);
 719                        goto error_info;
 720                }
 721
 722                slot->next = ctrl->slot;
 723                ctrl->slot = slot;
 724
 725                number_of_slots--;
 726                slot_device++;
 727                slot_number++;
 728        }
 729
 730        return 0;
 731error_info:
 732        kfree(hotplug_slot_info);
 733error_hpslot:
 734        kfree(hotplug_slot);
 735error_slot:
 736        kfree(slot);
 737error:
 738        return result;
 739}
 740
 741static int one_time_init(void)
 742{
 743        int loop;
 744        int retval = 0;
 745
 746        if (initialized)
 747                return 0;
 748
 749        power_mode = 0;
 750
 751        retval = init_cpqhp_routing_table();
 752        if (retval)
 753                goto error;
 754
 755        if (cpqhp_debug)
 756                pci_print_IRQ_route();
 757
 758        dbg("Initialize + Start the notification mechanism\n");
 759
 760        retval = cpqhp_event_start_thread();
 761        if (retval)
 762                goto error;
 763
 764        dbg("Initialize slot lists\n");
 765        for (loop = 0; loop < 256; loop++)
 766                cpqhp_slot_list[loop] = NULL;
 767
 768        /* FIXME: We also need to hook the NMI handler eventually.
 769         * this also needs to be worked with Christoph
 770         * register_NMI_handler();
 771         */
 772        /* Map rom address */
 773        cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
 774        if (!cpqhp_rom_start) {
 775                err("Could not ioremap memory region for ROM\n");
 776                retval = -EIO;
 777                goto error;
 778        }
 779
 780        /* Now, map the int15 entry point if we are on compaq specific
 781         * hardware
 782         */
 783        compaq_nvram_init(cpqhp_rom_start);
 784
 785        /* Map smbios table entry point structure */
 786        smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
 787                                        cpqhp_rom_start + ROM_PHY_LEN);
 788        if (!smbios_table) {
 789                err("Could not find the SMBIOS pointer in memory\n");
 790                retval = -EIO;
 791                goto error_rom_start;
 792        }
 793
 794        smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
 795                                        readw(smbios_table + ST_LENGTH));
 796        if (!smbios_start) {
 797                err("Could not ioremap memory region taken from SMBIOS values\n");
 798                retval = -EIO;
 799                goto error_smbios_start;
 800        }
 801
 802        initialized = 1;
 803
 804        return retval;
 805
 806error_smbios_start:
 807        iounmap(smbios_start);
 808error_rom_start:
 809        iounmap(cpqhp_rom_start);
 810error:
 811        return retval;
 812}
 813
 814static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 815{
 816        u8 num_of_slots = 0;
 817        u8 hp_slot = 0;
 818        u8 device;
 819        u8 bus_cap;
 820        u16 temp_word;
 821        u16 vendor_id;
 822        u16 subsystem_vid;
 823        u16 subsystem_deviceid;
 824        u32 rc;
 825        struct controller *ctrl;
 826        struct pci_func *func;
 827        struct pci_bus *bus;
 828        int err;
 829
 830        err = pci_enable_device(pdev);
 831        if (err) {
 832                printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
 833                        pci_name(pdev), err);
 834                return err;
 835        }
 836
 837        bus = pdev->subordinate;
 838        if (!bus) {
 839                dev_notice(&pdev->dev, "the device is not a bridge, skipping\n");
 840                rc = -ENODEV;
 841                goto err_disable_device;
 842        }
 843
 844        /* Need to read VID early b/c it's used to differentiate CPQ and INTC
 845         * discovery
 846         */
 847        vendor_id = pdev->vendor;
 848        if ((vendor_id != PCI_VENDOR_ID_COMPAQ) &&
 849            (vendor_id != PCI_VENDOR_ID_INTEL)) {
 850                err(msg_HPC_non_compaq_or_intel);
 851                rc = -ENODEV;
 852                goto err_disable_device;
 853        }
 854        dbg("Vendor ID: %x\n", vendor_id);
 855
 856        dbg("revision: %d\n", pdev->revision);
 857        if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
 858                err(msg_HPC_rev_error);
 859                rc = -ENODEV;
 860                goto err_disable_device;
 861        }
 862
 863        /* Check for the proper subsystem IDs
 864         * Intel uses a different SSID programming model than Compaq.
 865         * For Intel, each SSID bit identifies a PHP capability.
 866         * Also Intel HPCs may have RID=0.
 867         */
 868        if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) {
 869                err(msg_HPC_not_supported);
 870                rc = -ENODEV;
 871                goto err_disable_device;
 872        }
 873
 874        /* TODO: This code can be made to support non-Compaq or Intel
 875         * subsystem IDs
 876         */
 877        subsystem_vid = pdev->subsystem_vendor;
 878        dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
 879        if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
 880                err(msg_HPC_non_compaq_or_intel);
 881                rc = -ENODEV;
 882                goto err_disable_device;
 883        }
 884
 885        ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 886        if (!ctrl) {
 887                err("%s : out of memory\n", __func__);
 888                rc = -ENOMEM;
 889                goto err_disable_device;
 890        }
 891
 892        subsystem_deviceid = pdev->subsystem_device;
 893
 894        info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
 895
 896        /* Set Vendor ID, so it can be accessed later from other
 897         * functions
 898         */
 899        ctrl->vendor_id = vendor_id;
 900
 901        switch (subsystem_vid) {
 902        case PCI_VENDOR_ID_COMPAQ:
 903                if (pdev->revision >= 0x13) { /* CIOBX */
 904                        ctrl->push_flag = 1;
 905                        ctrl->slot_switch_type = 1;
 906                        ctrl->push_button = 1;
 907                        ctrl->pci_config_space = 1;
 908                        ctrl->defeature_PHP = 1;
 909                        ctrl->pcix_support = 1;
 910                        ctrl->pcix_speed_capability = 1;
 911                        pci_read_config_byte(pdev, 0x41, &bus_cap);
 912                        if (bus_cap & 0x80) {
 913                                dbg("bus max supports 133MHz PCI-X\n");
 914                                bus->max_bus_speed = PCI_SPEED_133MHz_PCIX;
 915                                break;
 916                        }
 917                        if (bus_cap & 0x40) {
 918                                dbg("bus max supports 100MHz PCI-X\n");
 919                                bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
 920                                break;
 921                        }
 922                        if (bus_cap & 0x20) {
 923                                dbg("bus max supports 66MHz PCI-X\n");
 924                                bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;
 925                                break;
 926                        }
 927                        if (bus_cap & 0x10) {
 928                                dbg("bus max supports 66MHz PCI\n");
 929                                bus->max_bus_speed = PCI_SPEED_66MHz;
 930                                break;
 931                        }
 932
 933                        break;
 934                }
 935
 936                switch (subsystem_deviceid) {
 937                case PCI_SUB_HPC_ID:
 938                        /* Original 6500/7000 implementation */
 939                        ctrl->slot_switch_type = 1;
 940                        bus->max_bus_speed = PCI_SPEED_33MHz;
 941                        ctrl->push_button = 0;
 942                        ctrl->pci_config_space = 1;
 943                        ctrl->defeature_PHP = 1;
 944                        ctrl->pcix_support = 0;
 945                        ctrl->pcix_speed_capability = 0;
 946                        break;
 947                case PCI_SUB_HPC_ID2:
 948                        /* First Pushbutton implementation */
 949                        ctrl->push_flag = 1;
 950                        ctrl->slot_switch_type = 1;
 951                        bus->max_bus_speed = PCI_SPEED_33MHz;
 952                        ctrl->push_button = 1;
 953                        ctrl->pci_config_space = 1;
 954                        ctrl->defeature_PHP = 1;
 955                        ctrl->pcix_support = 0;
 956                        ctrl->pcix_speed_capability = 0;
 957                        break;
 958                case PCI_SUB_HPC_ID_INTC:
 959                        /* Third party (6500/7000) */
 960                        ctrl->slot_switch_type = 1;
 961                        bus->max_bus_speed = PCI_SPEED_33MHz;
 962                        ctrl->push_button = 0;
 963                        ctrl->pci_config_space = 1;
 964                        ctrl->defeature_PHP = 1;
 965                        ctrl->pcix_support = 0;
 966                        ctrl->pcix_speed_capability = 0;
 967                        break;
 968                case PCI_SUB_HPC_ID3:
 969                        /* First 66 Mhz implementation */
 970                        ctrl->push_flag = 1;
 971                        ctrl->slot_switch_type = 1;
 972                        bus->max_bus_speed = PCI_SPEED_66MHz;
 973                        ctrl->push_button = 1;
 974                        ctrl->pci_config_space = 1;
 975                        ctrl->defeature_PHP = 1;
 976                        ctrl->pcix_support = 0;
 977                        ctrl->pcix_speed_capability = 0;
 978                        break;
 979                case PCI_SUB_HPC_ID4:
 980                        /* First PCI-X implementation, 100MHz */
 981                        ctrl->push_flag = 1;
 982                        ctrl->slot_switch_type = 1;
 983                        bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
 984                        ctrl->push_button = 1;
 985                        ctrl->pci_config_space = 1;
 986                        ctrl->defeature_PHP = 1;
 987                        ctrl->pcix_support = 1;
 988                        ctrl->pcix_speed_capability = 0;
 989                        break;
 990                default:
 991                        err(msg_HPC_not_supported);
 992                        rc = -ENODEV;
 993                        goto err_free_ctrl;
 994                }
 995                break;
 996
 997        case PCI_VENDOR_ID_INTEL:
 998                /* Check for speed capability (0=33, 1=66) */
 999                if (subsystem_deviceid & 0x0001)
1000                        bus->max_bus_speed = PCI_SPEED_66MHz;
1001                else
1002                        bus->max_bus_speed = PCI_SPEED_33MHz;
1003
1004                /* Check for push button */
1005                if (subsystem_deviceid & 0x0002)
1006                        ctrl->push_button = 0;
1007                else
1008                        ctrl->push_button = 1;
1009
1010                /* Check for slot switch type (0=mechanical, 1=not mechanical) */
1011                if (subsystem_deviceid & 0x0004)
1012                        ctrl->slot_switch_type = 0;
1013                else
1014                        ctrl->slot_switch_type = 1;
1015
1016                /* PHP Status (0=De-feature PHP, 1=Normal operation) */
1017                if (subsystem_deviceid & 0x0008)
1018                        ctrl->defeature_PHP = 1;        /* PHP supported */
1019                else
1020                        ctrl->defeature_PHP = 0;        /* PHP not supported */
1021
1022                /* Alternate Base Address Register Interface
1023                 * (0=not supported, 1=supported)
1024                 */
1025                if (subsystem_deviceid & 0x0010)
1026                        ctrl->alternate_base_address = 1;
1027                else
1028                        ctrl->alternate_base_address = 0;
1029
1030                /* PCI Config Space Index (0=not supported, 1=supported) */
1031                if (subsystem_deviceid & 0x0020)
1032                        ctrl->pci_config_space = 1;
1033                else
1034                        ctrl->pci_config_space = 0;
1035
1036                /* PCI-X support */
1037                if (subsystem_deviceid & 0x0080) {
1038                        ctrl->pcix_support = 1;
1039                        if (subsystem_deviceid & 0x0040)
1040                                /* 133MHz PCI-X if bit 7 is 1 */
1041                                ctrl->pcix_speed_capability = 1;
1042                        else
1043                                /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1044                                /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1045                                ctrl->pcix_speed_capability = 0;
1046                } else {
1047                        /* Conventional PCI */
1048                        ctrl->pcix_support = 0;
1049                        ctrl->pcix_speed_capability = 0;
1050                }
1051                break;
1052
1053        default:
1054                err(msg_HPC_not_supported);
1055                rc = -ENODEV;
1056                goto err_free_ctrl;
1057        }
1058
1059        /* Tell the user that we found one. */
1060        info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1061                                        pdev->bus->number);
1062
1063        dbg("Hotplug controller capabilities:\n");
1064        dbg("    speed_capability       %d\n", bus->max_bus_speed);
1065        dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1066                                        "switch present" : "no switch");
1067        dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1068                                        "PHP supported" : "PHP not supported");
1069        dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1070                                        "supported" : "not supported");
1071        dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1072                                        "supported" : "not supported");
1073        dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1074                                        "supported" : "not supported");
1075        dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1076                                        "supported" : "not supported");
1077
1078        ctrl->pci_dev = pdev;
1079        pci_set_drvdata(pdev, ctrl);
1080
1081        /* make our own copy of the pci bus structure,
1082         * as we like tweaking it a lot */
1083        ctrl->pci_bus = kmemdup(pdev->bus, sizeof(*ctrl->pci_bus), GFP_KERNEL);
1084        if (!ctrl->pci_bus) {
1085                err("out of memory\n");
1086                rc = -ENOMEM;
1087                goto err_free_ctrl;
1088        }
1089
1090        ctrl->bus = pdev->bus->number;
1091        ctrl->rev = pdev->revision;
1092        dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1093                PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1094
1095        mutex_init(&ctrl->crit_sect);
1096        init_waitqueue_head(&ctrl->queue);
1097
1098        /* initialize our threads if they haven't already been started up */
1099        rc = one_time_init();
1100        if (rc)
1101                goto err_free_bus;
1102
1103        dbg("pdev = %p\n", pdev);
1104        dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1105        dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1106
1107        if (!request_mem_region(pci_resource_start(pdev, 0),
1108                                pci_resource_len(pdev, 0), MY_NAME)) {
1109                err("cannot reserve MMIO region\n");
1110                rc = -ENOMEM;
1111                goto err_free_bus;
1112        }
1113
1114        ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1115                                        pci_resource_len(pdev, 0));
1116        if (!ctrl->hpc_reg) {
1117                err("cannot remap MMIO region %llx @ %llx\n",
1118                    (unsigned long long)pci_resource_len(pdev, 0),
1119                    (unsigned long long)pci_resource_start(pdev, 0));
1120                rc = -ENODEV;
1121                goto err_free_mem_region;
1122        }
1123
1124        /* Check for 66Mhz operation */
1125        bus->cur_bus_speed = get_controller_speed(ctrl);
1126
1127
1128        /********************************************************
1129         *
1130         *              Save configuration headers for this and
1131         *              subordinate PCI buses
1132         *
1133         ********************************************************/
1134
1135        /* find the physical slot number of the first hot plug slot */
1136
1137        /* Get slot won't work for devices behind bridges, but
1138         * in this case it will always be called for the "base"
1139         * bus/dev/func of a slot.
1140         * CS: this is leveraging the PCIIRQ routing code from the kernel
1141         * (pci-pc.c: get_irq_routing_table) */
1142        rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1143                                (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1144                                &(ctrl->first_slot));
1145        dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1146                                ctrl->first_slot, rc);
1147        if (rc) {
1148                err(msg_initialization_err, rc);
1149                goto err_iounmap;
1150        }
1151
1152        /* Store PCI Config Space for all devices on this bus */
1153        rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1154        if (rc) {
1155                err("%s: unable to save PCI configuration data, error %d\n",
1156                                __func__, rc);
1157                goto err_iounmap;
1158        }
1159
1160        /*
1161         * Get IO, memory, and IRQ resources for new devices
1162         */
1163        /* The next line is required for cpqhp_find_available_resources */
1164        ctrl->interrupt = pdev->irq;
1165        if (ctrl->interrupt < 0x10) {
1166                cpqhp_legacy_mode = 1;
1167                dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1168        }
1169
1170        ctrl->cfgspc_irq = 0;
1171        pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1172
1173        rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1174        ctrl->add_support = !rc;
1175        if (rc) {
1176                dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1177                err("unable to locate PCI configuration resources for hot plug add.\n");
1178                goto err_iounmap;
1179        }
1180
1181        /*
1182         * Finish setting up the hot plug ctrl device
1183         */
1184        ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1185        dbg("NumSlots %d\n", ctrl->slot_device_offset);
1186
1187        ctrl->next_event = 0;
1188
1189        /* Setup the slot information structures */
1190        rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1191        if (rc) {
1192                err(msg_initialization_err, 6);
1193                err("%s: unable to save PCI configuration data, error %d\n",
1194                        __func__, rc);
1195                goto err_iounmap;
1196        }
1197
1198        /* Mask all general input interrupts */
1199        writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1200
1201        /* set up the interrupt */
1202        dbg("HPC interrupt = %d\n", ctrl->interrupt);
1203        if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1204                        IRQF_SHARED, MY_NAME, ctrl)) {
1205                err("Can't get irq %d for the hotplug pci controller\n",
1206                        ctrl->interrupt);
1207                rc = -ENODEV;
1208                goto err_iounmap;
1209        }
1210
1211        /* Enable Shift Out interrupt and clear it, also enable SERR on power
1212         * fault
1213         */
1214        temp_word = readw(ctrl->hpc_reg + MISC);
1215        temp_word |= 0x4006;
1216        writew(temp_word, ctrl->hpc_reg + MISC);
1217
1218        /* Changed 05/05/97 to clear all interrupts at start */
1219        writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1220
1221        ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1222
1223        writel(0x0L, ctrl->hpc_reg + INT_MASK);
1224
1225        if (!cpqhp_ctrl_list) {
1226                cpqhp_ctrl_list = ctrl;
1227                ctrl->next = NULL;
1228        } else {
1229                ctrl->next = cpqhp_ctrl_list;
1230                cpqhp_ctrl_list = ctrl;
1231        }
1232
1233        /* turn off empty slots here unless command line option "ON" set
1234         * Wait for exclusive access to hardware
1235         */
1236        mutex_lock(&ctrl->crit_sect);
1237
1238        num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1239
1240        /* find first device number for the ctrl */
1241        device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1242
1243        while (num_of_slots) {
1244                dbg("num_of_slots: %d\n", num_of_slots);
1245                func = cpqhp_slot_find(ctrl->bus, device, 0);
1246                if (!func)
1247                        break;
1248
1249                hp_slot = func->device - ctrl->slot_device_offset;
1250                dbg("hp_slot: %d\n", hp_slot);
1251
1252                /* We have to save the presence info for these slots */
1253                temp_word = ctrl->ctrl_int_comp >> 16;
1254                func->presence_save = (temp_word >> hp_slot) & 0x01;
1255                func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1256
1257                if (ctrl->ctrl_int_comp & (0x1L << hp_slot))
1258                        func->switch_save = 0;
1259                else
1260                        func->switch_save = 0x10;
1261
1262                if (!power_mode)
1263                        if (!func->is_a_board) {
1264                                green_LED_off(ctrl, hp_slot);
1265                                slot_disable(ctrl, hp_slot);
1266                        }
1267
1268                device++;
1269                num_of_slots--;
1270        }
1271
1272        if (!power_mode) {
1273                set_SOGO(ctrl);
1274                /* Wait for SOBS to be unset */
1275                wait_for_ctrl_irq(ctrl);
1276        }
1277
1278        rc = init_SERR(ctrl);
1279        if (rc) {
1280                err("init_SERR failed\n");
1281                mutex_unlock(&ctrl->crit_sect);
1282                goto err_free_irq;
1283        }
1284
1285        /* Done with exclusive hardware access */
1286        mutex_unlock(&ctrl->crit_sect);
1287
1288        cpqhp_create_debugfs_files(ctrl);
1289
1290        return 0;
1291
1292err_free_irq:
1293        free_irq(ctrl->interrupt, ctrl);
1294err_iounmap:
1295        iounmap(ctrl->hpc_reg);
1296err_free_mem_region:
1297        release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1298err_free_bus:
1299        kfree(ctrl->pci_bus);
1300err_free_ctrl:
1301        kfree(ctrl);
1302err_disable_device:
1303        pci_disable_device(pdev);
1304        return rc;
1305}
1306
1307static void __exit unload_cpqphpd(void)
1308{
1309        struct pci_func *next;
1310        struct pci_func *TempSlot;
1311        int loop;
1312        u32 rc;
1313        struct controller *ctrl;
1314        struct controller *tctrl;
1315        struct pci_resource *res;
1316        struct pci_resource *tres;
1317
1318        rc = compaq_nvram_store(cpqhp_rom_start);
1319
1320        ctrl = cpqhp_ctrl_list;
1321
1322        while (ctrl) {
1323                if (ctrl->hpc_reg) {
1324                        u16 misc;
1325                        rc = read_slot_enable(ctrl);
1326
1327                        writeb(0, ctrl->hpc_reg + SLOT_SERR);
1328                        writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1329
1330                        misc = readw(ctrl->hpc_reg + MISC);
1331                        misc &= 0xFFFD;
1332                        writew(misc, ctrl->hpc_reg + MISC);
1333                }
1334
1335                ctrl_slot_cleanup(ctrl);
1336
1337                res = ctrl->io_head;
1338                while (res) {
1339                        tres = res;
1340                        res = res->next;
1341                        kfree(tres);
1342                }
1343
1344                res = ctrl->mem_head;
1345                while (res) {
1346                        tres = res;
1347                        res = res->next;
1348                        kfree(tres);
1349                }
1350
1351                res = ctrl->p_mem_head;
1352                while (res) {
1353                        tres = res;
1354                        res = res->next;
1355                        kfree(tres);
1356                }
1357
1358                res = ctrl->bus_head;
1359                while (res) {
1360                        tres = res;
1361                        res = res->next;
1362                        kfree(tres);
1363                }
1364
1365                kfree(ctrl->pci_bus);
1366
1367                tctrl = ctrl;
1368                ctrl = ctrl->next;
1369                kfree(tctrl);
1370        }
1371
1372        for (loop = 0; loop < 256; loop++) {
1373                next = cpqhp_slot_list[loop];
1374                while (next != NULL) {
1375                        res = next->io_head;
1376                        while (res) {
1377                                tres = res;
1378                                res = res->next;
1379                                kfree(tres);
1380                        }
1381
1382                        res = next->mem_head;
1383                        while (res) {
1384                                tres = res;
1385                                res = res->next;
1386                                kfree(tres);
1387                        }
1388
1389                        res = next->p_mem_head;
1390                        while (res) {
1391                                tres = res;
1392                                res = res->next;
1393                                kfree(tres);
1394                        }
1395
1396                        res = next->bus_head;
1397                        while (res) {
1398                                tres = res;
1399                                res = res->next;
1400                                kfree(tres);
1401                        }
1402
1403                        TempSlot = next;
1404                        next = next->next;
1405                        kfree(TempSlot);
1406                }
1407        }
1408
1409        /* Stop the notification mechanism */
1410        if (initialized)
1411                cpqhp_event_stop_thread();
1412
1413        /* unmap the rom address */
1414        if (cpqhp_rom_start)
1415                iounmap(cpqhp_rom_start);
1416        if (smbios_start)
1417                iounmap(smbios_start);
1418}
1419
1420static struct pci_device_id hpcd_pci_tbl[] = {
1421        {
1422        /* handle any PCI Hotplug controller */
1423        .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1424        .class_mask =   ~0,
1425
1426        /* no matter who makes it */
1427        .vendor =       PCI_ANY_ID,
1428        .device =       PCI_ANY_ID,
1429        .subvendor =    PCI_ANY_ID,
1430        .subdevice =    PCI_ANY_ID,
1431
1432        }, { /* end: all zeroes */ }
1433};
1434
1435MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1436
1437static struct pci_driver cpqhpc_driver = {
1438        .name =         "compaq_pci_hotplug",
1439        .id_table =     hpcd_pci_tbl,
1440        .probe =        cpqhpc_probe,
1441        /* remove:      cpqhpc_remove_one, */
1442};
1443
1444static int __init cpqhpc_init(void)
1445{
1446        int result;
1447
1448        cpqhp_debug = debug;
1449
1450        info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1451        cpqhp_initialize_debugfs();
1452        result = pci_register_driver(&cpqhpc_driver);
1453        dbg("pci_register_driver = %d\n", result);
1454        return result;
1455}
1456
1457static void __exit cpqhpc_cleanup(void)
1458{
1459        dbg("unload_cpqphpd()\n");
1460        unload_cpqphpd();
1461
1462        dbg("pci_unregister_driver\n");
1463        pci_unregister_driver(&cpqhpc_driver);
1464        cpqhp_shutdown_debugfs();
1465}
1466
1467module_init(cpqhpc_init);
1468module_exit(cpqhpc_cleanup);
1469
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