1 /* 2 * Compaq Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com> 6 * Copyright (C) 2001 IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <greg@kroah.com> 26 * 27 * Jan 12, 2003 - Added 66/100/133MHz PCI-X support, 28 * Torben Mathiasen <torben.mathiasen@hp.com> 29 * 30 */ 31 32 #include <linux/module.h> 33 #include <linux/moduleparam.h> 34 #include <linux/kernel.h> 35 #include <linux/types.h> 36 #include <linux/proc_fs.h> 37 #include <linux/slab.h> 38 #include <linux/workqueue.h> 39 #include <linux/pci.h> 40 #include <linux/pci_hotplug.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 44 #include <asm/uaccess.h> 45 46 #include "cpqphp.h" 47 #include "cpqphp_nvram.h" 48 #include "../../../arch/x86/pci/pci.h" /* horrible hack showing how processor dependent we are... */ 49 50 51 /* Global variables */ 52 int cpqhp_debug; 53 int cpqhp_legacy_mode; 54 struct controller *cpqhp_ctrl_list; /* = NULL */ 55 struct pci_func *cpqhp_slot_list[256]; 56 57 /* local variables */ 58 static void __iomem *smbios_table; 59 static void __iomem *smbios_start; 60 static void __iomem *cpqhp_rom_start; 61 static int power_mode; 62 static int debug; 63 static int initialized; 64 65 #define DRIVER_VERSION "0.9.8" 66 #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>" 67 #define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver" 68 69 MODULE_AUTHOR(DRIVER_AUTHOR); 70 MODULE_DESCRIPTION(DRIVER_DESC); 71 MODULE_LICENSE("GPL"); 72 73 module_param(power_mode, bool, 0644); 74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not"); 75 76 module_param(debug, bool, 0644); 77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); 78 79 #define CPQHPC_MODULE_MINOR 208 80 81 static int one_time_init (void); 82 static int set_attention_status (struct hotplug_slot *slot, u8 value); 83 static int process_SI (struct hotplug_slot *slot); 84 static int process_SS (struct hotplug_slot *slot); 85 static int hardware_test (struct hotplug_slot *slot, u32 value); 86 static int get_power_status (struct hotplug_slot *slot, u8 *value); 87 static int get_attention_status (struct hotplug_slot *slot, u8 *value); 88 static int get_latch_status (struct hotplug_slot *slot, u8 *value); 89 static int get_adapter_status (struct hotplug_slot *slot, u8 *value); 90 static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 91 static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 92 93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { 94 .owner = THIS_MODULE, 95 .set_attention_status = set_attention_status, 96 .enable_slot = process_SI, 97 .disable_slot = process_SS, 98 .hardware_test = hardware_test, 99 .get_power_status = get_power_status, 100 .get_attention_status = get_attention_status, 101 .get_latch_status = get_latch_status, 102 .get_adapter_status = get_adapter_status, 103 .get_max_bus_speed = get_max_bus_speed, 104 .get_cur_bus_speed = get_cur_bus_speed, 105 }; 106 107 108 static inline int is_slot64bit(struct slot *slot) 109 { 110 return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; 111 } 112 113 static inline int is_slot66mhz(struct slot *slot) 114 { 115 return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; 116 } 117 118 /** 119 * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. 120 * @begin: begin pointer for region to be scanned. 121 * @end: end pointer for region to be scanned. 122 * 123 * Returns pointer to the head of the SMBIOS tables (or %NULL). 124 */ 125 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) 126 { 127 void __iomem *fp; 128 void __iomem *endp; 129 u8 temp1, temp2, temp3, temp4; 130 int status = 0; 131 132 endp = (end - sizeof(u32) + 1); 133 134 for (fp = begin; fp <= endp; fp += 16) { 135 temp1 = readb(fp); 136 temp2 = readb(fp+1); 137 temp3 = readb(fp+2); 138 temp4 = readb(fp+3); 139 if (temp1 == '_' && 140 temp2 == 'S' && 141 temp3 == 'M' && 142 temp4 == '_') { 143 status = 1; 144 break; 145 } 146 } 147 148 if (!status) 149 fp = NULL; 150 151 dbg("Discovered SMBIOS Entry point at %p\n", fp); 152 153 return fp; 154 } 155 156 /** 157 * init_SERR - Initializes the per slot SERR generation. 158 * @ctrl: controller to use 159 * 160 * For unexpected switch opens 161 */ 162 static int init_SERR(struct controller * ctrl) 163 { 164 u32 tempdword; 165 u32 number_of_slots; 166 u8 physical_slot; 167 168 if (!ctrl) 169 return 1; 170 171 tempdword = ctrl->first_slot; 172 173 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 174 // Loop through slots 175 while (number_of_slots) { 176 physical_slot = tempdword; 177 writeb(0, ctrl->hpc_reg + SLOT_SERR); 178 tempdword++; 179 number_of_slots--; 180 } 181 182 return 0; 183 } 184 185 186 /* nice debugging output */ 187 static int pci_print_IRQ_route (void) 188 { 189 struct irq_routing_table *routing_table; 190 int len; 191 int loop; 192 193 u8 tbus, tdevice, tslot; 194 195 routing_table = pcibios_get_irq_routing_table(); 196 if (routing_table == NULL) { 197 err("No BIOS Routing Table??? Not good\n"); 198 return -ENOMEM; 199 } 200 201 len = (routing_table->size - sizeof(struct irq_routing_table)) / 202 sizeof(struct irq_info); 203 // Make sure I got at least one entry 204 if (len == 0) { 205 kfree(routing_table); 206 return -1; 207 } 208 209 dbg("bus dev func slot\n"); 210 211 for (loop = 0; loop < len; ++loop) { 212 tbus = routing_table->slots[loop].bus; 213 tdevice = routing_table->slots[loop].devfn; 214 tslot = routing_table->slots[loop].slot; 215 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); 216 217 } 218 kfree(routing_table); 219 return 0; 220 } 221 222 223 /** 224 * get_subsequent_smbios_entry: get the next entry from bios table. 225 * @smbios_start: where to start in the SMBIOS table 226 * @smbios_table: location of the SMBIOS table 227 * @curr: %NULL or pointer to previously returned structure 228 * 229 * Gets the first entry if previous == NULL; 230 * otherwise, returns the next entry. 231 * Uses global SMBIOS Table pointer. 232 * 233 * Returns a pointer to an SMBIOS structure or NULL if none found. 234 */ 235 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, 236 void __iomem *smbios_table, 237 void __iomem *curr) 238 { 239 u8 bail = 0; 240 u8 previous_byte = 1; 241 void __iomem *p_temp; 242 void __iomem *p_max; 243 244 if (!smbios_table || !curr) 245 return(NULL); 246 247 // set p_max to the end of the table 248 p_max = smbios_start + readw(smbios_table + ST_LENGTH); 249 250 p_temp = curr; 251 p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); 252 253 while ((p_temp < p_max) && !bail) { 254 /* Look for the double NULL terminator 255 * The first condition is the previous byte 256 * and the second is the curr */ 257 if (!previous_byte && !(readb(p_temp))) { 258 bail = 1; 259 } 260 261 previous_byte = readb(p_temp); 262 p_temp++; 263 } 264 265 if (p_temp < p_max) { 266 return p_temp; 267 } else { 268 return NULL; 269 } 270 } 271 272 273 /** 274 * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL 275 * @smbios_start: where to start in the SMBIOS table 276 * @smbios_table: location of the SMBIOS table 277 * @type: SMBIOS structure type to be returned 278 * @previous: %NULL or pointer to previously returned structure 279 * 280 * Gets the first entry of the specified type if previous == %NULL; 281 * Otherwise, returns the next entry of the given type. 282 * Uses global SMBIOS Table pointer. 283 * Uses get_subsequent_smbios_entry. 284 * 285 * Returns a pointer to an SMBIOS structure or %NULL if none found. 286 */ 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, 288 void __iomem *smbios_table, 289 u8 type, 290 void __iomem *previous) 291 { 292 if (!smbios_table) 293 return NULL; 294 295 if (!previous) { 296 previous = smbios_start; 297 } else { 298 previous = get_subsequent_smbios_entry(smbios_start, 299 smbios_table, previous); 300 } 301 302 while (previous) { 303 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) { 304 previous = get_subsequent_smbios_entry(smbios_start, 305 smbios_table, previous); 306 } else { 307 break; 308 } 309 } 310 311 return previous; 312 } 313 314 static void release_slot(struct hotplug_slot *hotplug_slot) 315 { 316 struct slot *slot = hotplug_slot->private; 317 318 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 319 320 kfree(slot->hotplug_slot->info); 321 kfree(slot->hotplug_slot); 322 kfree(slot); 323 } 324 325 #define SLOT_NAME_SIZE 10 326 327 static int ctrl_slot_setup(struct controller *ctrl, 328 void __iomem *smbios_start, 329 void __iomem *smbios_table) 330 { 331 struct slot *slot; 332 struct hotplug_slot *hotplug_slot; 333 struct hotplug_slot_info *hotplug_slot_info; 334 u8 number_of_slots; 335 u8 slot_device; 336 u8 slot_number; 337 u8 ctrl_slot; 338 u32 tempdword; 339 char name[SLOT_NAME_SIZE]; 340 void __iomem *slot_entry= NULL; 341 int result = -ENOMEM; 342 343 dbg("%s\n", __func__); 344 345 tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 346 347 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 348 slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 349 slot_number = ctrl->first_slot; 350 351 while (number_of_slots) { 352 slot = kzalloc(sizeof(*slot), GFP_KERNEL); 353 if (!slot) 354 goto error; 355 356 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)), 357 GFP_KERNEL); 358 if (!slot->hotplug_slot) 359 goto error_slot; 360 hotplug_slot = slot->hotplug_slot; 361 362 hotplug_slot->info = 363 kzalloc(sizeof(*(hotplug_slot->info)), 364 GFP_KERNEL); 365 if (!hotplug_slot->info) 366 goto error_hpslot; 367 hotplug_slot_info = hotplug_slot->info; 368 369 slot->ctrl = ctrl; 370 slot->bus = ctrl->bus; 371 slot->device = slot_device; 372 slot->number = slot_number; 373 dbg("slot->number = %u\n", slot->number); 374 375 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, 376 slot_entry); 377 378 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != 379 slot->number)) { 380 slot_entry = get_SMBIOS_entry(smbios_start, 381 smbios_table, 9, slot_entry); 382 } 383 384 slot->p_sm_slot = slot_entry; 385 386 init_timer(&slot->task_event); 387 slot->task_event.expires = jiffies + 5 * HZ; 388 slot->task_event.function = cpqhp_pushbutton_thread; 389 390 //FIXME: these capabilities aren't used but if they are 391 // they need to be correctly implemented 392 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; 393 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; 394 395 if (is_slot64bit(slot)) 396 slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; 397 if (is_slot66mhz(slot)) 398 slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; 399 if (ctrl->speed == PCI_SPEED_66MHz) 400 slot->capabilities |= PCISLOT_66_MHZ_OPERATION; 401 402 ctrl_slot = 403 slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); 404 405 // Check presence 406 slot->capabilities |= 407 ((((~tempdword) >> 23) | 408 ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; 409 // Check the switch state 410 slot->capabilities |= 411 ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; 412 // Check the slot enable 413 slot->capabilities |= 414 ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; 415 416 /* register this slot with the hotplug pci core */ 417 hotplug_slot->release = &release_slot; 418 hotplug_slot->private = slot; 419 snprintf(name, SLOT_NAME_SIZE, "%u", slot->number); 420 hotplug_slot->ops = &cpqphp_hotplug_slot_ops; 421 422 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot); 423 hotplug_slot_info->attention_status = 424 cpq_get_attention_status(ctrl, slot); 425 hotplug_slot_info->latch_status = 426 cpq_get_latch_status(ctrl, slot); 427 hotplug_slot_info->adapter_status = 428 get_presence_status(ctrl, slot); 429 430 dbg("registering bus %d, dev %d, number %d, " 431 "ctrl->slot_device_offset %d, slot %d\n", 432 slot->bus, slot->device, 433 slot->number, ctrl->slot_device_offset, 434 slot_number); 435 result = pci_hp_register(hotplug_slot, 436 ctrl->pci_dev->bus, 437 slot->device, 438 name); 439 if (result) { 440 err("pci_hp_register failed with error %d\n", result); 441 goto error_info; 442 } 443 444 slot->next = ctrl->slot; 445 ctrl->slot = slot; 446 447 number_of_slots--; 448 slot_device++; 449 slot_number++; 450 } 451 452 return 0; 453 error_info: 454 kfree(hotplug_slot_info); 455 error_hpslot: 456 kfree(hotplug_slot); 457 error_slot: 458 kfree(slot); 459 error: 460 return result; 461 } 462 463 static int ctrl_slot_cleanup (struct controller * ctrl) 464 { 465 struct slot *old_slot, *next_slot; 466 467 old_slot = ctrl->slot; 468 ctrl->slot = NULL; 469 470 while (old_slot) { 471 /* memory will be freed by the release_slot callback */ 472 next_slot = old_slot->next; 473 pci_hp_deregister (old_slot->hotplug_slot); 474 old_slot = next_slot; 475 } 476 477 cpqhp_remove_debugfs_files(ctrl); 478 479 //Free IRQ associated with hot plug device 480 free_irq(ctrl->interrupt, ctrl); 481 //Unmap the memory 482 iounmap(ctrl->hpc_reg); 483 //Finally reclaim PCI mem 484 release_mem_region(pci_resource_start(ctrl->pci_dev, 0), 485 pci_resource_len(ctrl->pci_dev, 0)); 486 487 return(0); 488 } 489 490 491 //============================================================================ 492 // function: get_slot_mapping 493 // 494 // Description: Attempts to determine a logical slot mapping for a PCI 495 // device. Won't work for more than one PCI-PCI bridge 496 // in a slot. 497 // 498 // Input: u8 bus_num - bus number of PCI device 499 // u8 dev_num - device number of PCI device 500 // u8 *slot - Pointer to u8 where slot number will 501 // be returned 502 // 503 // Output: SUCCESS or FAILURE 504 //============================================================================= 505 static int 506 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) 507 { 508 struct irq_routing_table *PCIIRQRoutingInfoLength; 509 u32 work; 510 long len; 511 long loop; 512 513 u8 tbus, tdevice, tslot, bridgeSlot; 514 515 dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot); 516 517 bridgeSlot = 0xFF; 518 519 PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); 520 if (!PCIIRQRoutingInfoLength) 521 return -1; 522 523 len = (PCIIRQRoutingInfoLength->size - 524 sizeof(struct irq_routing_table)) / sizeof(struct irq_info); 525 // Make sure I got at least one entry 526 if (len == 0) { 527 kfree(PCIIRQRoutingInfoLength); 528 return -1; 529 } 530 531 for (loop = 0; loop < len; ++loop) { 532 tbus = PCIIRQRoutingInfoLength->slots[loop].bus; 533 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; 534 tslot = PCIIRQRoutingInfoLength->slots[loop].slot; 535 536 if ((tbus == bus_num) && (tdevice == dev_num)) { 537 *slot = tslot; 538 kfree(PCIIRQRoutingInfoLength); 539 return 0; 540 } else { 541 /* Did not get a match on the target PCI device. Check 542 * if the current IRQ table entry is a PCI-to-PCI bridge 543 * device. If so, and it's secondary bus matches the 544 * bus number for the target device, I need to save the 545 * bridge's slot number. If I can not find an entry for 546 * the target device, I will have to assume it's on the 547 * other side of the bridge, and assign it the bridge's 548 * slot. */ 549 bus->number = tbus; 550 pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), 551 PCI_CLASS_REVISION, &work); 552 553 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { 554 pci_bus_read_config_dword(bus, 555 PCI_DEVFN(tdevice, 0), 556 PCI_PRIMARY_BUS, &work); 557 // See if bridge's secondary bus matches target bus. 558 if (((work >> 8) & 0x000000FF) == (long) bus_num) { 559 bridgeSlot = tslot; 560 } 561 } 562 } 563 564 } 565 566 // If we got here, we didn't find an entry in the IRQ mapping table 567 // for the target PCI device. If we did determine that the target 568 // device is on the other side of a PCI-to-PCI bridge, return the 569 // slot number for the bridge. 570 if (bridgeSlot != 0xFF) { 571 *slot = bridgeSlot; 572 kfree(PCIIRQRoutingInfoLength); 573 return 0; 574 } 575 kfree(PCIIRQRoutingInfoLength); 576 // Couldn't find an entry in the routing table for this PCI device 577 return -1; 578 } 579 580 581 /** 582 * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off 583 * @ctrl: struct controller to use 584 * @func: PCI device/function info 585 * @status: LED control flag: 1 = LED on, 0 = LED off 586 */ 587 static int 588 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, 589 u32 status) 590 { 591 u8 hp_slot; 592 593 if (func == NULL) 594 return(1); 595 596 hp_slot = func->device - ctrl->slot_device_offset; 597 598 // Wait for exclusive access to hardware 599 mutex_lock(&ctrl->crit_sect); 600 601 if (status == 1) { 602 amber_LED_on (ctrl, hp_slot); 603 } else if (status == 0) { 604 amber_LED_off (ctrl, hp_slot); 605 } else { 606 // Done with exclusive hardware access 607 mutex_unlock(&ctrl->crit_sect); 608 return(1); 609 } 610 611 set_SOGO(ctrl); 612 613 // Wait for SOBS to be unset 614 wait_for_ctrl_irq (ctrl); 615 616 // Done with exclusive hardware access 617 mutex_unlock(&ctrl->crit_sect); 618 619 return(0); 620 } 621 622 623 /** 624 * set_attention_status - Turns the Amber LED for a slot on or off 625 * @hotplug_slot: slot to change LED on 626 * @status: LED control flag 627 */ 628 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) 629 { 630 struct pci_func *slot_func; 631 struct slot *slot = hotplug_slot->private; 632 struct controller *ctrl = slot->ctrl; 633 u8 bus; 634 u8 devfn; 635 u8 device; 636 u8 function; 637 638 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 639 640 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 641 return -ENODEV; 642 643 device = devfn >> 3; 644 function = devfn & 0x7; 645 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 646 647 slot_func = cpqhp_slot_find(bus, device, function); 648 if (!slot_func) 649 return -ENODEV; 650 651 return cpqhp_set_attention_status(ctrl, slot_func, status); 652 } 653 654 655 static int process_SI(struct hotplug_slot *hotplug_slot) 656 { 657 struct pci_func *slot_func; 658 struct slot *slot = hotplug_slot->private; 659 struct controller *ctrl = slot->ctrl; 660 u8 bus; 661 u8 devfn; 662 u8 device; 663 u8 function; 664 665 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 666 667 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 668 return -ENODEV; 669 670 device = devfn >> 3; 671 function = devfn & 0x7; 672 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 673 674 slot_func = cpqhp_slot_find(bus, device, function); 675 if (!slot_func) 676 return -ENODEV; 677 678 slot_func->bus = bus; 679 slot_func->device = device; 680 slot_func->function = function; 681 slot_func->configured = 0; 682 dbg("board_added(%p, %p)\n", slot_func, ctrl); 683 return cpqhp_process_SI(ctrl, slot_func); 684 } 685 686 687 static int process_SS(struct hotplug_slot *hotplug_slot) 688 { 689 struct pci_func *slot_func; 690 struct slot *slot = hotplug_slot->private; 691 struct controller *ctrl = slot->ctrl; 692 u8 bus; 693 u8 devfn; 694 u8 device; 695 u8 function; 696 697 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 698 699 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 700 return -ENODEV; 701 702 device = devfn >> 3; 703 function = devfn & 0x7; 704 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 705 706 slot_func = cpqhp_slot_find(bus, device, function); 707 if (!slot_func) 708 return -ENODEV; 709 710 dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl); 711 return cpqhp_process_SS(ctrl, slot_func); 712 } 713 714 715 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) 716 { 717 struct slot *slot = hotplug_slot->private; 718 struct controller *ctrl = slot->ctrl; 719 720 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 721 722 return cpqhp_hardware_test(ctrl, value); 723 } 724 725 726 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) 727 { 728 struct slot *slot = hotplug_slot->private; 729 struct controller *ctrl = slot->ctrl; 730 731 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 732 733 *value = get_slot_enabled(ctrl, slot); 734 return 0; 735 } 736 737 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) 738 { 739 struct slot *slot = hotplug_slot->private; 740 struct controller *ctrl = slot->ctrl; 741 742 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 743 744 *value = cpq_get_attention_status(ctrl, slot); 745 return 0; 746 } 747 748 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) 749 { 750 struct slot *slot = hotplug_slot->private; 751 struct controller *ctrl = slot->ctrl; 752 753 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 754 755 *value = cpq_get_latch_status(ctrl, slot); 756 757 return 0; 758 } 759 760 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) 761 { 762 struct slot *slot = hotplug_slot->private; 763 struct controller *ctrl = slot->ctrl; 764 765 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 766 767 *value = get_presence_status(ctrl, slot); 768 769 return 0; 770 } 771 772 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 773 { 774 struct slot *slot = hotplug_slot->private; 775 struct controller *ctrl = slot->ctrl; 776 777 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 778 779 *value = ctrl->speed_capability; 780 781 return 0; 782 } 783 784 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 785 { 786 struct slot *slot = hotplug_slot->private; 787 struct controller *ctrl = slot->ctrl; 788 789 dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); 790 791 *value = ctrl->speed; 792 793 return 0; 794 } 795 796 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 797 { 798 u8 num_of_slots = 0; 799 u8 hp_slot = 0; 800 u8 device; 801 u8 bus_cap; 802 u16 temp_word; 803 u16 vendor_id; 804 u16 subsystem_vid; 805 u16 subsystem_deviceid; 806 u32 rc; 807 struct controller *ctrl; 808 struct pci_func *func; 809 int err; 810 811 err = pci_enable_device(pdev); 812 if (err) { 813 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", 814 pci_name(pdev), err); 815 return err; 816 } 817 818 // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery 819 rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); 820 if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { 821 err(msg_HPC_non_compaq_or_intel); 822 rc = -ENODEV; 823 goto err_disable_device; 824 } 825 dbg("Vendor ID: %x\n", vendor_id); 826 827 dbg("revision: %d\n", pdev->revision); 828 if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) { 829 err(msg_HPC_rev_error); 830 rc = -ENODEV; 831 goto err_disable_device; 832 } 833 834 /* Check for the proper subsytem ID's 835 * Intel uses a different SSID programming model than Compaq. 836 * For Intel, each SSID bit identifies a PHP capability. 837 * Also Intel HPC's may have RID=0. 838 */ 839 if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { 840 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs 841 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); 842 if (rc) { 843 err("%s : pci_read_config_word failed\n", __func__); 844 goto err_disable_device; 845 } 846 dbg("Subsystem Vendor ID: %x\n", subsystem_vid); 847 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { 848 err(msg_HPC_non_compaq_or_intel); 849 rc = -ENODEV; 850 goto err_disable_device; 851 } 852 853 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL); 854 if (!ctrl) { 855 err("%s : out of memory\n", __func__); 856 rc = -ENOMEM; 857 goto err_disable_device; 858 } 859 860 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); 861 if (rc) { 862 err("%s : pci_read_config_word failed\n", __func__); 863 goto err_free_ctrl; 864 } 865 866 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); 867 868 /* Set Vendor ID, so it can be accessed later from other functions */ 869 ctrl->vendor_id = vendor_id; 870 871 switch (subsystem_vid) { 872 case PCI_VENDOR_ID_COMPAQ: 873 if (pdev->revision >= 0x13) { /* CIOBX */ 874 ctrl->push_flag = 1; 875 ctrl->slot_switch_type = 1; 876 ctrl->push_button = 1; 877 ctrl->pci_config_space = 1; 878 ctrl->defeature_PHP = 1; 879 ctrl->pcix_support = 1; 880 ctrl->pcix_speed_capability = 1; 881 pci_read_config_byte(pdev, 0x41, &bus_cap); 882 if (bus_cap & 0x80) { 883 dbg("bus max supports 133MHz PCI-X\n"); 884 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; 885 break; 886 } 887 if (bus_cap & 0x40) { 888 dbg("bus max supports 100MHz PCI-X\n"); 889 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 890 break; 891 } 892 if (bus_cap & 20) { 893 dbg("bus max supports 66MHz PCI-X\n"); 894 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; 895 break; 896 } 897 if (bus_cap & 10) { 898 dbg("bus max supports 66MHz PCI\n"); 899 ctrl->speed_capability = PCI_SPEED_66MHz; 900 break; 901 } 902 903 break; 904 } 905 906 switch (subsystem_deviceid) { 907 case PCI_SUB_HPC_ID: 908 /* Original 6500/7000 implementation */ 909 ctrl->slot_switch_type = 1; 910 ctrl->speed_capability = PCI_SPEED_33MHz; 911 ctrl->push_button = 0; 912 ctrl->pci_config_space = 1; 913 ctrl->defeature_PHP = 1; 914 ctrl->pcix_support = 0; 915 ctrl->pcix_speed_capability = 0; 916 break; 917 case PCI_SUB_HPC_ID2: 918 /* First Pushbutton implementation */ 919 ctrl->push_flag = 1; 920 ctrl->slot_switch_type = 1; 921 ctrl->speed_capability = PCI_SPEED_33MHz; 922 ctrl->push_button = 1; 923 ctrl->pci_config_space = 1; 924 ctrl->defeature_PHP = 1; 925 ctrl->pcix_support = 0; 926 ctrl->pcix_speed_capability = 0; 927 break; 928 case PCI_SUB_HPC_ID_INTC: 929 /* Third party (6500/7000) */ 930 ctrl->slot_switch_type = 1; 931 ctrl->speed_capability = PCI_SPEED_33MHz; 932 ctrl->push_button = 0; 933 ctrl->pci_config_space = 1; 934 ctrl->defeature_PHP = 1; 935 ctrl->pcix_support = 0; 936 ctrl->pcix_speed_capability = 0; 937 break; 938 case PCI_SUB_HPC_ID3: 939 /* First 66 Mhz implementation */ 940 ctrl->push_flag = 1; 941 ctrl->slot_switch_type = 1; 942 ctrl->speed_capability = PCI_SPEED_66MHz; 943 ctrl->push_button = 1; 944 ctrl->pci_config_space = 1; 945 ctrl->defeature_PHP = 1; 946 ctrl->pcix_support = 0; 947 ctrl->pcix_speed_capability = 0; 948 break; 949 case PCI_SUB_HPC_ID4: 950 /* First PCI-X implementation, 100MHz */ 951 ctrl->push_flag = 1; 952 ctrl->slot_switch_type = 1; 953 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 954 ctrl->push_button = 1; 955 ctrl->pci_config_space = 1; 956 ctrl->defeature_PHP = 1; 957 ctrl->pcix_support = 1; 958 ctrl->pcix_speed_capability = 0; 959 break; 960 default: 961 err(msg_HPC_not_supported); 962 rc = -ENODEV; 963 goto err_free_ctrl; 964 } 965 break; 966 967 case PCI_VENDOR_ID_INTEL: 968 /* Check for speed capability (0=33, 1=66) */ 969 if (subsystem_deviceid & 0x0001) { 970 ctrl->speed_capability = PCI_SPEED_66MHz; 971 } else { 972 ctrl->speed_capability = PCI_SPEED_33MHz; 973 } 974 975 /* Check for push button */ 976 if (subsystem_deviceid & 0x0002) { 977 /* no push button */ 978 ctrl->push_button = 0; 979 } else { 980 /* push button supported */ 981 ctrl->push_button = 1; 982 } 983 984 /* Check for slot switch type (0=mechanical, 1=not mechanical) */ 985 if (subsystem_deviceid & 0x0004) { 986 /* no switch */ 987 ctrl->slot_switch_type = 0; 988 } else { 989 /* switch */ 990 ctrl->slot_switch_type = 1; 991 } 992 993 /* PHP Status (0=De-feature PHP, 1=Normal operation) */ 994 if (subsystem_deviceid & 0x0008) { 995 ctrl->defeature_PHP = 1; // PHP supported 996 } else { 997 ctrl->defeature_PHP = 0; // PHP not supported 998 } 999 1000 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ 1001 if (subsystem_deviceid & 0x0010) { 1002 ctrl->alternate_base_address = 1; // supported 1003 } else { 1004 ctrl->alternate_base_address = 0; // not supported 1005 } 1006 1007 /* PCI Config Space Index (0=not supported, 1=supported) */ 1008 if (subsystem_deviceid & 0x0020) { 1009 ctrl->pci_config_space = 1; // supported 1010 } else { 1011 ctrl->pci_config_space = 0; // not supported 1012 } 1013 1014 /* PCI-X support */ 1015 if (subsystem_deviceid & 0x0080) { 1016 /* PCI-X capable */ 1017 ctrl->pcix_support = 1; 1018 /* Frequency of operation in PCI-X mode */ 1019 if (subsystem_deviceid & 0x0040) { 1020 /* 133MHz PCI-X if bit 7 is 1 */ 1021 ctrl->pcix_speed_capability = 1; 1022 } else { 1023 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ 1024 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ 1025 ctrl->pcix_speed_capability = 0; 1026 } 1027 } else { 1028 /* Conventional PCI */ 1029 ctrl->pcix_support = 0; 1030 ctrl->pcix_speed_capability = 0; 1031 } 1032 break; 1033 1034 default: 1035 err(msg_HPC_not_supported); 1036 rc = -ENODEV; 1037 goto err_free_ctrl; 1038 } 1039 1040 } else { 1041 err(msg_HPC_not_supported); 1042 return -ENODEV; 1043 } 1044 1045 // Tell the user that we found one. 1046 info("Initializing the PCI hot plug controller residing on PCI bus %d\n", 1047 pdev->bus->number); 1048 1049 dbg("Hotplug controller capabilities:\n"); 1050 dbg(" speed_capability %d\n", ctrl->speed_capability); 1051 dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? 1052 "switch present" : "no switch"); 1053 dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? 1054 "PHP supported" : "PHP not supported"); 1055 dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? 1056 "supported" : "not supported"); 1057 dbg(" pci_config_space %s\n", ctrl->pci_config_space ? 1058 "supported" : "not supported"); 1059 dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? 1060 "supported" : "not supported"); 1061 dbg(" pcix_support %s\n", ctrl->pcix_support ? 1062 "supported" : "not supported"); 1063 1064 ctrl->pci_dev = pdev; 1065 pci_set_drvdata(pdev, ctrl); 1066 1067 /* make our own copy of the pci bus structure, 1068 * as we like tweaking it a lot */ 1069 ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); 1070 if (!ctrl->pci_bus) { 1071 err("out of memory\n"); 1072 rc = -ENOMEM; 1073 goto err_free_ctrl; 1074 } 1075 memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); 1076 1077 ctrl->bus = pdev->bus->number; 1078 ctrl->rev = pdev->revision; 1079 dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, 1080 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); 1081 1082 mutex_init(&ctrl->crit_sect); 1083 init_waitqueue_head(&ctrl->queue); 1084 1085 /* initialize our threads if they haven't already been started up */ 1086 rc = one_time_init(); 1087 if (rc) { 1088 goto err_free_bus; 1089 } 1090 1091 dbg("pdev = %p\n", pdev); 1092 dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0)); 1093 dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0)); 1094 1095 if (!request_mem_region(pci_resource_start(pdev, 0), 1096 pci_resource_len(pdev, 0), MY_NAME)) { 1097 err("cannot reserve MMIO region\n"); 1098 rc = -ENOMEM; 1099 goto err_free_bus; 1100 } 1101 1102 ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), 1103 pci_resource_len(pdev, 0)); 1104 if (!ctrl->hpc_reg) { 1105 err("cannot remap MMIO region %llx @ %llx\n", 1106 (unsigned long long)pci_resource_len(pdev, 0), 1107 (unsigned long long)pci_resource_start(pdev, 0)); 1108 rc = -ENODEV; 1109 goto err_free_mem_region; 1110 } 1111 1112 // Check for 66Mhz operation 1113 ctrl->speed = get_controller_speed(ctrl); 1114 1115 1116 /******************************************************** 1117 * 1118 * Save configuration headers for this and 1119 * subordinate PCI buses 1120 * 1121 ********************************************************/ 1122 1123 // find the physical slot number of the first hot plug slot 1124 1125 /* Get slot won't work for devices behind bridges, but 1126 * in this case it will always be called for the "base" 1127 * bus/dev/func of a slot. 1128 * CS: this is leveraging the PCIIRQ routing code from the kernel 1129 * (pci-pc.c: get_irq_routing_table) */ 1130 rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, 1131 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), 1132 &(ctrl->first_slot)); 1133 dbg("get_slot_mapping: first_slot = %d, returned = %d\n", 1134 ctrl->first_slot, rc); 1135 if (rc) { 1136 err(msg_initialization_err, rc); 1137 goto err_iounmap; 1138 } 1139 1140 // Store PCI Config Space for all devices on this bus 1141 rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); 1142 if (rc) { 1143 err("%s: unable to save PCI configuration data, error %d\n", 1144 __func__, rc); 1145 goto err_iounmap; 1146 } 1147 1148 /* 1149 * Get IO, memory, and IRQ resources for new devices 1150 */ 1151 // The next line is required for cpqhp_find_available_resources 1152 ctrl->interrupt = pdev->irq; 1153 if (ctrl->interrupt < 0x10) { 1154 cpqhp_legacy_mode = 1; 1155 dbg("System seems to be configured for Full Table Mapped MPS mode\n"); 1156 } 1157 1158 ctrl->cfgspc_irq = 0; 1159 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); 1160 1161 rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); 1162 ctrl->add_support = !rc; 1163 if (rc) { 1164 dbg("cpqhp_find_available_resources = 0x%x\n", rc); 1165 err("unable to locate PCI configuration resources for hot plug add.\n"); 1166 goto err_iounmap; 1167 } 1168 1169 /* 1170 * Finish setting up the hot plug ctrl device 1171 */ 1172 ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1173 dbg("NumSlots %d \n", ctrl->slot_device_offset); 1174 1175 ctrl->next_event = 0; 1176 1177 /* Setup the slot information structures */ 1178 rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); 1179 if (rc) { 1180 err(msg_initialization_err, 6); 1181 err("%s: unable to save PCI configuration data, error %d\n", 1182 __func__, rc); 1183 goto err_iounmap; 1184 } 1185 1186 /* Mask all general input interrupts */ 1187 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); 1188 1189 /* set up the interrupt */ 1190 dbg("HPC interrupt = %d \n", ctrl->interrupt); 1191 if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, 1192 IRQF_SHARED, MY_NAME, ctrl)) { 1193 err("Can't get irq %d for the hotplug pci controller\n", 1194 ctrl->interrupt); 1195 rc = -ENODEV; 1196 goto err_iounmap; 1197 } 1198 1199 /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ 1200 temp_word = readw(ctrl->hpc_reg + MISC); 1201 temp_word |= 0x4006; 1202 writew(temp_word, ctrl->hpc_reg + MISC); 1203 1204 // Changed 05/05/97 to clear all interrupts at start 1205 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); 1206 1207 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 1208 1209 writel(0x0L, ctrl->hpc_reg + INT_MASK); 1210 1211 if (!cpqhp_ctrl_list) { 1212 cpqhp_ctrl_list = ctrl; 1213 ctrl->next = NULL; 1214 } else { 1215 ctrl->next = cpqhp_ctrl_list; 1216 cpqhp_ctrl_list = ctrl; 1217 } 1218 1219 // turn off empty slots here unless command line option "ON" set 1220 // Wait for exclusive access to hardware 1221 mutex_lock(&ctrl->crit_sect); 1222 1223 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 1224 1225 // find first device number for the ctrl 1226 device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1227 1228 while (num_of_slots) { 1229 dbg("num_of_slots: %d\n", num_of_slots); 1230 func = cpqhp_slot_find(ctrl->bus, device, 0); 1231 if (!func) 1232 break; 1233 1234 hp_slot = func->device - ctrl->slot_device_offset; 1235 dbg("hp_slot: %d\n", hp_slot); 1236 1237 // We have to save the presence info for these slots 1238 temp_word = ctrl->ctrl_int_comp >> 16; 1239 func->presence_save = (temp_word >> hp_slot) & 0x01; 1240 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; 1241 1242 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { 1243 func->switch_save = 0; 1244 } else { 1245 func->switch_save = 0x10; 1246 } 1247 1248 if (!power_mode) { 1249 if (!func->is_a_board) { 1250 green_LED_off(ctrl, hp_slot); 1251 slot_disable(ctrl, hp_slot); 1252 } 1253 } 1254 1255 device++; 1256 num_of_slots--; 1257 } 1258 1259 if (!power_mode) { 1260 set_SOGO(ctrl); 1261 // Wait for SOBS to be unset 1262 wait_for_ctrl_irq(ctrl); 1263 } 1264 1265 rc = init_SERR(ctrl); 1266 if (rc) { 1267 err("init_SERR failed\n"); 1268 mutex_unlock(&ctrl->crit_sect); 1269 goto err_free_irq; 1270 } 1271 1272 // Done with exclusive hardware access 1273 mutex_unlock(&ctrl->crit_sect); 1274 1275 cpqhp_create_debugfs_files(ctrl); 1276 1277 return 0; 1278 1279 err_free_irq: 1280 free_irq(ctrl->interrupt, ctrl); 1281 err_iounmap: 1282 iounmap(ctrl->hpc_reg); 1283 err_free_mem_region: 1284 release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 1285 err_free_bus: 1286 kfree(ctrl->pci_bus); 1287 err_free_ctrl: 1288 kfree(ctrl); 1289 err_disable_device: 1290 pci_disable_device(pdev); 1291 return rc; 1292 } 1293 1294 1295 static int one_time_init(void) 1296 { 1297 int loop; 1298 int retval = 0; 1299 1300 if (initialized) 1301 return 0; 1302 1303 power_mode = 0; 1304 1305 retval = pci_print_IRQ_route(); 1306 if (retval) 1307 goto error; 1308 1309 dbg("Initialize + Start the notification mechanism \n"); 1310 1311 retval = cpqhp_event_start_thread(); 1312 if (retval) 1313 goto error; 1314 1315 dbg("Initialize slot lists\n"); 1316 for (loop = 0; loop < 256; loop++) { 1317 cpqhp_slot_list[loop] = NULL; 1318 } 1319 1320 // FIXME: We also need to hook the NMI handler eventually. 1321 // this also needs to be worked with Christoph 1322 // register_NMI_handler(); 1323 1324 // Map rom address 1325 cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); 1326 if (!cpqhp_rom_start) { 1327 err ("Could not ioremap memory region for ROM\n"); 1328 retval = -EIO; 1329 goto error; 1330 } 1331 1332 /* Now, map the int15 entry point if we are on compaq specific hardware */ 1333 compaq_nvram_init(cpqhp_rom_start); 1334 1335 /* Map smbios table entry point structure */ 1336 smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, 1337 cpqhp_rom_start + ROM_PHY_LEN); 1338 if (!smbios_table) { 1339 err ("Could not find the SMBIOS pointer in memory\n"); 1340 retval = -EIO; 1341 goto error_rom_start; 1342 } 1343 1344 smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), 1345 readw(smbios_table + ST_LENGTH)); 1346 if (!smbios_start) { 1347 err ("Could not ioremap memory region taken from SMBIOS values\n"); 1348 retval = -EIO; 1349 goto error_smbios_start; 1350 } 1351 1352 initialized = 1; 1353 1354 return retval; 1355 1356 error_smbios_start: 1357 iounmap(smbios_start); 1358 error_rom_start: 1359 iounmap(cpqhp_rom_start); 1360 error: 1361 return retval; 1362 } 1363 1364 1365 static void __exit unload_cpqphpd(void) 1366 { 1367 struct pci_func *next; 1368 struct pci_func *TempSlot; 1369 int loop; 1370 u32 rc; 1371 struct controller *ctrl; 1372 struct controller *tctrl; 1373 struct pci_resource *res; 1374 struct pci_resource *tres; 1375 1376 rc = compaq_nvram_store(cpqhp_rom_start); 1377 1378 ctrl = cpqhp_ctrl_list; 1379 1380 while (ctrl) { 1381 if (ctrl->hpc_reg) { 1382 u16 misc; 1383 rc = read_slot_enable (ctrl); 1384 1385 writeb(0, ctrl->hpc_reg + SLOT_SERR); 1386 writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); 1387 1388 misc = readw(ctrl->hpc_reg + MISC); 1389 misc &= 0xFFFD; 1390 writew(misc, ctrl->hpc_reg + MISC); 1391 } 1392 1393 ctrl_slot_cleanup(ctrl); 1394 1395 res = ctrl->io_head; 1396 while (res) { 1397 tres = res; 1398 res = res->next; 1399 kfree(tres); 1400 } 1401 1402 res = ctrl->mem_head; 1403 while (res) { 1404 tres = res; 1405 res = res->next; 1406 kfree(tres); 1407 } 1408 1409 res = ctrl->p_mem_head; 1410 while (res) { 1411 tres = res; 1412 res = res->next; 1413 kfree(tres); 1414 } 1415 1416 res = ctrl->bus_head; 1417 while (res) { 1418 tres = res; 1419 res = res->next; 1420 kfree(tres); 1421 } 1422 1423 kfree (ctrl->pci_bus); 1424 1425 tctrl = ctrl; 1426 ctrl = ctrl->next; 1427 kfree(tctrl); 1428 } 1429 1430 for (loop = 0; loop < 256; loop++) { 1431 next = cpqhp_slot_list[loop]; 1432 while (next != NULL) { 1433 res = next->io_head; 1434 while (res) { 1435 tres = res; 1436 res = res->next; 1437 kfree(tres); 1438 } 1439 1440 res = next->mem_head; 1441 while (res) { 1442 tres = res; 1443 res = res->next; 1444 kfree(tres); 1445 } 1446 1447 res = next->p_mem_head; 1448 while (res) { 1449 tres = res; 1450 res = res->next; 1451 kfree(tres); 1452 } 1453 1454 res = next->bus_head; 1455 while (res) { 1456 tres = res; 1457 res = res->next; 1458 kfree(tres); 1459 } 1460 1461 TempSlot = next; 1462 next = next->next; 1463 kfree(TempSlot); 1464 } 1465 } 1466 1467 // Stop the notification mechanism 1468 if (initialized) 1469 cpqhp_event_stop_thread(); 1470 1471 //unmap the rom address 1472 if (cpqhp_rom_start) 1473 iounmap(cpqhp_rom_start); 1474 if (smbios_start) 1475 iounmap(smbios_start); 1476 } 1477 1478 1479 1480 static struct pci_device_id hpcd_pci_tbl[] = { 1481 { 1482 /* handle any PCI Hotplug controller */ 1483 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1484 .class_mask = ~0, 1485 1486 /* no matter who makes it */ 1487 .vendor = PCI_ANY_ID, 1488 .device = PCI_ANY_ID, 1489 .subvendor = PCI_ANY_ID, 1490 .subdevice = PCI_ANY_ID, 1491 1492 }, { /* end: all zeroes */ } 1493 }; 1494 1495 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); 1496 1497 1498 1499 static struct pci_driver cpqhpc_driver = { 1500 .name = "compaq_pci_hotplug", 1501 .id_table = hpcd_pci_tbl, 1502 .probe = cpqhpc_probe, 1503 /* remove: cpqhpc_remove_one, */ 1504 }; 1505 1506 1507 1508 static int __init cpqhpc_init(void) 1509 { 1510 int result; 1511 1512 cpqhp_debug = debug; 1513 1514 info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); 1515 cpqhp_initialize_debugfs(); 1516 result = pci_register_driver(&cpqhpc_driver); 1517 dbg("pci_register_driver = %d\n", result); 1518 return result; 1519 } 1520 1521 1522 static void __exit cpqhpc_cleanup(void) 1523 { 1524 dbg("unload_cpqphpd()\n"); 1525 unload_cpqphpd(); 1526 1527 dbg("pci_unregister_driver\n"); 1528 pci_unregister_driver(&cpqhpc_driver); 1529 cpqhp_shutdown_debugfs(); 1530 } 1531 1532 1533 module_init(cpqhpc_init); 1534 module_exit(cpqhpc_cleanup); 1535 1536 1537