1 /* 2 * Compaq Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com> 6 * Copyright (C) 2001 IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <greg@kroah.com> 26 * 27 * Jan 12, 2003 - Added 66/100/133MHz PCI-X support, 28 * Torben Mathiasen <torben.mathiasen@hp.com> 29 * 30 */ 31 32 #include <linux/module.h> 33 #include <linux/moduleparam.h> 34 #include <linux/kernel.h> 35 #include <linux/types.h> 36 #include <linux/proc_fs.h> 37 #include <linux/slab.h> 38 #include <linux/workqueue.h> 39 #include <linux/pci.h> 40 #include <linux/pci_hotplug.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 44 #include <asm/uaccess.h> 45 46 #include "cpqphp.h" 47 #include "cpqphp_nvram.h" 48 #include "../../../arch/x86/pci/pci.h" /* horrible hack showing how processor dependent we are... */ 49 50 51 /* Global variables */ 52 int cpqhp_debug; 53 int cpqhp_legacy_mode; 54 struct controller *cpqhp_ctrl_list; /* = NULL */ 55 struct pci_func *cpqhp_slot_list[256]; 56 57 /* local variables */ 58 static void __iomem *smbios_table; 59 static void __iomem *smbios_start; 60 static void __iomem *cpqhp_rom_start; 61 static int power_mode; 62 static int debug; 63 static int initialized; 64 65 #define DRIVER_VERSION "0.9.8" 66 #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>" 67 #define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver" 68 69 MODULE_AUTHOR(DRIVER_AUTHOR); 70 MODULE_DESCRIPTION(DRIVER_DESC); 71 MODULE_LICENSE("GPL"); 72 73 module_param(power_mode, bool, 0644); 74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not"); 75 76 module_param(debug, bool, 0644); 77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); 78 79 #define CPQHPC_MODULE_MINOR 208 80 81 static int one_time_init (void); 82 static int set_attention_status (struct hotplug_slot *slot, u8 value); 83 static int process_SI (struct hotplug_slot *slot); 84 static int process_SS (struct hotplug_slot *slot); 85 static int hardware_test (struct hotplug_slot *slot, u32 value); 86 static int get_power_status (struct hotplug_slot *slot, u8 *value); 87 static int get_attention_status (struct hotplug_slot *slot, u8 *value); 88 static int get_latch_status (struct hotplug_slot *slot, u8 *value); 89 static int get_adapter_status (struct hotplug_slot *slot, u8 *value); 90 static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 91 static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 92 93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { 94 .owner = THIS_MODULE, 95 .set_attention_status = set_attention_status, 96 .enable_slot = process_SI, 97 .disable_slot = process_SS, 98 .hardware_test = hardware_test, 99 .get_power_status = get_power_status, 100 .get_attention_status = get_attention_status, 101 .get_latch_status = get_latch_status, 102 .get_adapter_status = get_adapter_status, 103 .get_max_bus_speed = get_max_bus_speed, 104 .get_cur_bus_speed = get_cur_bus_speed, 105 }; 106 107 108 static inline int is_slot64bit(struct slot *slot) 109 { 110 return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; 111 } 112 113 static inline int is_slot66mhz(struct slot *slot) 114 { 115 return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; 116 } 117 118 /** 119 * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. 120 * @begin: begin pointer for region to be scanned. 121 * @end: end pointer for region to be scanned. 122 * 123 * Returns pointer to the head of the SMBIOS tables (or %NULL). 124 */ 125 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) 126 { 127 void __iomem *fp; 128 void __iomem *endp; 129 u8 temp1, temp2, temp3, temp4; 130 int status = 0; 131 132 endp = (end - sizeof(u32) + 1); 133 134 for (fp = begin; fp <= endp; fp += 16) { 135 temp1 = readb(fp); 136 temp2 = readb(fp+1); 137 temp3 = readb(fp+2); 138 temp4 = readb(fp+3); 139 if (temp1 == '_' && 140 temp2 == 'S' && 141 temp3 == 'M' && 142 temp4 == '_') { 143 status = 1; 144 break; 145 } 146 } 147 148 if (!status) 149 fp = NULL; 150 151 dbg("Discovered SMBIOS Entry point at %p\n", fp); 152 153 return fp; 154 } 155 156 /** 157 * init_SERR - Initializes the per slot SERR generation. 158 * @ctrl: controller to use 159 * 160 * For unexpected switch opens 161 */ 162 static int init_SERR(struct controller * ctrl) 163 { 164 u32 tempdword; 165 u32 number_of_slots; 166 u8 physical_slot; 167 168 if (!ctrl) 169 return 1; 170 171 tempdword = ctrl->first_slot; 172 173 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 174 // Loop through slots 175 while (number_of_slots) { 176 physical_slot = tempdword; 177 writeb(0, ctrl->hpc_reg + SLOT_SERR); 178 tempdword++; 179 number_of_slots--; 180 } 181 182 return 0; 183 } 184 185 186 /* nice debugging output */ 187 static int pci_print_IRQ_route (void) 188 { 189 struct irq_routing_table *routing_table; 190 int len; 191 int loop; 192 193 u8 tbus, tdevice, tslot; 194 195 routing_table = pcibios_get_irq_routing_table(); 196 if (routing_table == NULL) { 197 err("No BIOS Routing Table??? Not good\n"); 198 return -ENOMEM; 199 } 200 201 len = (routing_table->size - sizeof(struct irq_routing_table)) / 202 sizeof(struct irq_info); 203 // Make sure I got at least one entry 204 if (len == 0) { 205 kfree(routing_table); 206 return -1; 207 } 208 209 dbg("bus dev func slot\n"); 210 211 for (loop = 0; loop < len; ++loop) { 212 tbus = routing_table->slots[loop].bus; 213 tdevice = routing_table->slots[loop].devfn; 214 tslot = routing_table->slots[loop].slot; 215 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); 216 217 } 218 kfree(routing_table); 219 return 0; 220 } 221 222 223 /** 224 * get_subsequent_smbios_entry: get the next entry from bios table. 225 * @smbios_start: where to start in the SMBIOS table 226 * @smbios_table: location of the SMBIOS table 227 * @curr: %NULL or pointer to previously returned structure 228 * 229 * Gets the first entry if previous == NULL; 230 * otherwise, returns the next entry. 231 * Uses global SMBIOS Table pointer. 232 * 233 * Returns a pointer to an SMBIOS structure or NULL if none found. 234 */ 235 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, 236 void __iomem *smbios_table, 237 void __iomem *curr) 238 { 239 u8 bail = 0; 240 u8 previous_byte = 1; 241 void __iomem *p_temp; 242 void __iomem *p_max; 243 244 if (!smbios_table || !curr) 245 return(NULL); 246 247 // set p_max to the end of the table 248 p_max = smbios_start + readw(smbios_table + ST_LENGTH); 249 250 p_temp = curr; 251 p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); 252 253 while ((p_temp < p_max) && !bail) { 254 /* Look for the double NULL terminator 255 * The first condition is the previous byte 256 * and the second is the curr */ 257 if (!previous_byte && !(readb(p_temp))) { 258 bail = 1; 259 } 260 261 previous_byte = readb(p_temp); 262 p_temp++; 263 } 264 265 if (p_temp < p_max) { 266 return p_temp; 267 } else { 268 return NULL; 269 } 270 } 271 272 273 /** 274 * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL 275 * @smbios_start: where to start in the SMBIOS table 276 * @smbios_table: location of the SMBIOS table 277 * @type: SMBIOS structure type to be returned 278 * @previous: %NULL or pointer to previously returned structure 279 * 280 * Gets the first entry of the specified type if previous == %NULL; 281 * Otherwise, returns the next entry of the given type. 282 * Uses global SMBIOS Table pointer. 283 * Uses get_subsequent_smbios_entry. 284 * 285 * Returns a pointer to an SMBIOS structure or %NULL if none found. 286 */ 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, 288 void __iomem *smbios_table, 289 u8 type, 290 void __iomem *previous) 291 { 292 if (!smbios_table) 293 return NULL; 294 295 if (!previous) { 296 previous = smbios_start; 297 } else { 298 previous = get_subsequent_smbios_entry(smbios_start, 299 smbios_table, previous); 300 } 301 302 while (previous) { 303 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) { 304 previous = get_subsequent_smbios_entry(smbios_start, 305 smbios_table, previous); 306 } else { 307 break; 308 } 309 } 310 311 return previous; 312 } 313 314 static void release_slot(struct hotplug_slot *hotplug_slot) 315 { 316 struct slot *slot = hotplug_slot->private; 317 318 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 319 320 kfree(slot->hotplug_slot->info); 321 kfree(slot->hotplug_slot->name); 322 kfree(slot->hotplug_slot); 323 kfree(slot); 324 } 325 326 static int ctrl_slot_setup(struct controller *ctrl, 327 void __iomem *smbios_start, 328 void __iomem *smbios_table) 329 { 330 struct slot *slot; 331 struct hotplug_slot *hotplug_slot; 332 struct hotplug_slot_info *hotplug_slot_info; 333 u8 number_of_slots; 334 u8 slot_device; 335 u8 slot_number; 336 u8 ctrl_slot; 337 u32 tempdword; 338 void __iomem *slot_entry= NULL; 339 int result = -ENOMEM; 340 341 dbg("%s\n", __func__); 342 343 tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 344 345 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 346 slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 347 slot_number = ctrl->first_slot; 348 349 while (number_of_slots) { 350 slot = kzalloc(sizeof(*slot), GFP_KERNEL); 351 if (!slot) 352 goto error; 353 354 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)), 355 GFP_KERNEL); 356 if (!slot->hotplug_slot) 357 goto error_slot; 358 hotplug_slot = slot->hotplug_slot; 359 360 hotplug_slot->info = 361 kzalloc(sizeof(*(hotplug_slot->info)), 362 GFP_KERNEL); 363 if (!hotplug_slot->info) 364 goto error_hpslot; 365 hotplug_slot_info = hotplug_slot->info; 366 hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); 367 368 if (!hotplug_slot->name) 369 goto error_info; 370 371 slot->ctrl = ctrl; 372 slot->bus = ctrl->bus; 373 slot->device = slot_device; 374 slot->number = slot_number; 375 dbg("slot->number = %d\n", slot->number); 376 377 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, 378 slot_entry); 379 380 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != 381 slot->number)) { 382 slot_entry = get_SMBIOS_entry(smbios_start, 383 smbios_table, 9, slot_entry); 384 } 385 386 slot->p_sm_slot = slot_entry; 387 388 init_timer(&slot->task_event); 389 slot->task_event.expires = jiffies + 5 * HZ; 390 slot->task_event.function = cpqhp_pushbutton_thread; 391 392 //FIXME: these capabilities aren't used but if they are 393 // they need to be correctly implemented 394 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; 395 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; 396 397 if (is_slot64bit(slot)) 398 slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; 399 if (is_slot66mhz(slot)) 400 slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; 401 if (ctrl->speed == PCI_SPEED_66MHz) 402 slot->capabilities |= PCISLOT_66_MHZ_OPERATION; 403 404 ctrl_slot = 405 slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); 406 407 // Check presence 408 slot->capabilities |= 409 ((((~tempdword) >> 23) | 410 ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; 411 // Check the switch state 412 slot->capabilities |= 413 ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; 414 // Check the slot enable 415 slot->capabilities |= 416 ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; 417 418 /* register this slot with the hotplug pci core */ 419 hotplug_slot->release = &release_slot; 420 hotplug_slot->private = slot; 421 make_slot_name(hotplug_slot->name, SLOT_NAME_SIZE, slot); 422 hotplug_slot->ops = &cpqphp_hotplug_slot_ops; 423 424 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot); 425 hotplug_slot_info->attention_status = 426 cpq_get_attention_status(ctrl, slot); 427 hotplug_slot_info->latch_status = 428 cpq_get_latch_status(ctrl, slot); 429 hotplug_slot_info->adapter_status = 430 get_presence_status(ctrl, slot); 431 432 dbg("registering bus %d, dev %d, number %d, " 433 "ctrl->slot_device_offset %d, slot %d\n", 434 slot->bus, slot->device, 435 slot->number, ctrl->slot_device_offset, 436 slot_number); 437 result = pci_hp_register(hotplug_slot, 438 ctrl->pci_dev->subordinate, 439 slot->device); 440 if (result) { 441 err("pci_hp_register failed with error %d\n", result); 442 goto error_name; 443 } 444 445 slot->next = ctrl->slot; 446 ctrl->slot = slot; 447 448 number_of_slots--; 449 slot_device++; 450 slot_number++; 451 } 452 453 return 0; 454 error_name: 455 kfree(hotplug_slot->name); 456 error_info: 457 kfree(hotplug_slot_info); 458 error_hpslot: 459 kfree(hotplug_slot); 460 error_slot: 461 kfree(slot); 462 error: 463 return result; 464 } 465 466 static int ctrl_slot_cleanup (struct controller * ctrl) 467 { 468 struct slot *old_slot, *next_slot; 469 470 old_slot = ctrl->slot; 471 ctrl->slot = NULL; 472 473 while (old_slot) { 474 /* memory will be freed by the release_slot callback */ 475 next_slot = old_slot->next; 476 pci_hp_deregister (old_slot->hotplug_slot); 477 old_slot = next_slot; 478 } 479 480 cpqhp_remove_debugfs_files(ctrl); 481 482 //Free IRQ associated with hot plug device 483 free_irq(ctrl->interrupt, ctrl); 484 //Unmap the memory 485 iounmap(ctrl->hpc_reg); 486 //Finally reclaim PCI mem 487 release_mem_region(pci_resource_start(ctrl->pci_dev, 0), 488 pci_resource_len(ctrl->pci_dev, 0)); 489 490 return(0); 491 } 492 493 494 //============================================================================ 495 // function: get_slot_mapping 496 // 497 // Description: Attempts to determine a logical slot mapping for a PCI 498 // device. Won't work for more than one PCI-PCI bridge 499 // in a slot. 500 // 501 // Input: u8 bus_num - bus number of PCI device 502 // u8 dev_num - device number of PCI device 503 // u8 *slot - Pointer to u8 where slot number will 504 // be returned 505 // 506 // Output: SUCCESS or FAILURE 507 //============================================================================= 508 static int 509 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) 510 { 511 struct irq_routing_table *PCIIRQRoutingInfoLength; 512 u32 work; 513 long len; 514 long loop; 515 516 u8 tbus, tdevice, tslot, bridgeSlot; 517 518 dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot); 519 520 bridgeSlot = 0xFF; 521 522 PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); 523 if (!PCIIRQRoutingInfoLength) 524 return -1; 525 526 len = (PCIIRQRoutingInfoLength->size - 527 sizeof(struct irq_routing_table)) / sizeof(struct irq_info); 528 // Make sure I got at least one entry 529 if (len == 0) { 530 kfree(PCIIRQRoutingInfoLength); 531 return -1; 532 } 533 534 for (loop = 0; loop < len; ++loop) { 535 tbus = PCIIRQRoutingInfoLength->slots[loop].bus; 536 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; 537 tslot = PCIIRQRoutingInfoLength->slots[loop].slot; 538 539 if ((tbus == bus_num) && (tdevice == dev_num)) { 540 *slot = tslot; 541 kfree(PCIIRQRoutingInfoLength); 542 return 0; 543 } else { 544 /* Did not get a match on the target PCI device. Check 545 * if the current IRQ table entry is a PCI-to-PCI bridge 546 * device. If so, and it's secondary bus matches the 547 * bus number for the target device, I need to save the 548 * bridge's slot number. If I can not find an entry for 549 * the target device, I will have to assume it's on the 550 * other side of the bridge, and assign it the bridge's 551 * slot. */ 552 bus->number = tbus; 553 pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), 554 PCI_CLASS_REVISION, &work); 555 556 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { 557 pci_bus_read_config_dword(bus, 558 PCI_DEVFN(tdevice, 0), 559 PCI_PRIMARY_BUS, &work); 560 // See if bridge's secondary bus matches target bus. 561 if (((work >> 8) & 0x000000FF) == (long) bus_num) { 562 bridgeSlot = tslot; 563 } 564 } 565 } 566 567 } 568 569 // If we got here, we didn't find an entry in the IRQ mapping table 570 // for the target PCI device. If we did determine that the target 571 // device is on the other side of a PCI-to-PCI bridge, return the 572 // slot number for the bridge. 573 if (bridgeSlot != 0xFF) { 574 *slot = bridgeSlot; 575 kfree(PCIIRQRoutingInfoLength); 576 return 0; 577 } 578 kfree(PCIIRQRoutingInfoLength); 579 // Couldn't find an entry in the routing table for this PCI device 580 return -1; 581 } 582 583 584 /** 585 * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off 586 * @ctrl: struct controller to use 587 * @func: PCI device/function info 588 * @status: LED control flag: 1 = LED on, 0 = LED off 589 */ 590 static int 591 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, 592 u32 status) 593 { 594 u8 hp_slot; 595 596 if (func == NULL) 597 return(1); 598 599 hp_slot = func->device - ctrl->slot_device_offset; 600 601 // Wait for exclusive access to hardware 602 mutex_lock(&ctrl->crit_sect); 603 604 if (status == 1) { 605 amber_LED_on (ctrl, hp_slot); 606 } else if (status == 0) { 607 amber_LED_off (ctrl, hp_slot); 608 } else { 609 // Done with exclusive hardware access 610 mutex_unlock(&ctrl->crit_sect); 611 return(1); 612 } 613 614 set_SOGO(ctrl); 615 616 // Wait for SOBS to be unset 617 wait_for_ctrl_irq (ctrl); 618 619 // Done with exclusive hardware access 620 mutex_unlock(&ctrl->crit_sect); 621 622 return(0); 623 } 624 625 626 /** 627 * set_attention_status - Turns the Amber LED for a slot on or off 628 * @hotplug_slot: slot to change LED on 629 * @status: LED control flag 630 */ 631 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) 632 { 633 struct pci_func *slot_func; 634 struct slot *slot = hotplug_slot->private; 635 struct controller *ctrl = slot->ctrl; 636 u8 bus; 637 u8 devfn; 638 u8 device; 639 u8 function; 640 641 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 642 643 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 644 return -ENODEV; 645 646 device = devfn >> 3; 647 function = devfn & 0x7; 648 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 649 650 slot_func = cpqhp_slot_find(bus, device, function); 651 if (!slot_func) 652 return -ENODEV; 653 654 return cpqhp_set_attention_status(ctrl, slot_func, status); 655 } 656 657 658 static int process_SI(struct hotplug_slot *hotplug_slot) 659 { 660 struct pci_func *slot_func; 661 struct slot *slot = hotplug_slot->private; 662 struct controller *ctrl = slot->ctrl; 663 u8 bus; 664 u8 devfn; 665 u8 device; 666 u8 function; 667 668 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 669 670 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 671 return -ENODEV; 672 673 device = devfn >> 3; 674 function = devfn & 0x7; 675 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 676 677 slot_func = cpqhp_slot_find(bus, device, function); 678 if (!slot_func) 679 return -ENODEV; 680 681 slot_func->bus = bus; 682 slot_func->device = device; 683 slot_func->function = function; 684 slot_func->configured = 0; 685 dbg("board_added(%p, %p)\n", slot_func, ctrl); 686 return cpqhp_process_SI(ctrl, slot_func); 687 } 688 689 690 static int process_SS(struct hotplug_slot *hotplug_slot) 691 { 692 struct pci_func *slot_func; 693 struct slot *slot = hotplug_slot->private; 694 struct controller *ctrl = slot->ctrl; 695 u8 bus; 696 u8 devfn; 697 u8 device; 698 u8 function; 699 700 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 701 702 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 703 return -ENODEV; 704 705 device = devfn >> 3; 706 function = devfn & 0x7; 707 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 708 709 slot_func = cpqhp_slot_find(bus, device, function); 710 if (!slot_func) 711 return -ENODEV; 712 713 dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl); 714 return cpqhp_process_SS(ctrl, slot_func); 715 } 716 717 718 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) 719 { 720 struct slot *slot = hotplug_slot->private; 721 struct controller *ctrl = slot->ctrl; 722 723 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 724 725 return cpqhp_hardware_test(ctrl, value); 726 } 727 728 729 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) 730 { 731 struct slot *slot = hotplug_slot->private; 732 struct controller *ctrl = slot->ctrl; 733 734 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 735 736 *value = get_slot_enabled(ctrl, slot); 737 return 0; 738 } 739 740 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) 741 { 742 struct slot *slot = hotplug_slot->private; 743 struct controller *ctrl = slot->ctrl; 744 745 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 746 747 *value = cpq_get_attention_status(ctrl, slot); 748 return 0; 749 } 750 751 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) 752 { 753 struct slot *slot = hotplug_slot->private; 754 struct controller *ctrl = slot->ctrl; 755 756 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 757 758 *value = cpq_get_latch_status(ctrl, slot); 759 760 return 0; 761 } 762 763 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) 764 { 765 struct slot *slot = hotplug_slot->private; 766 struct controller *ctrl = slot->ctrl; 767 768 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 769 770 *value = get_presence_status(ctrl, slot); 771 772 return 0; 773 } 774 775 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 776 { 777 struct slot *slot = hotplug_slot->private; 778 struct controller *ctrl = slot->ctrl; 779 780 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 781 782 *value = ctrl->speed_capability; 783 784 return 0; 785 } 786 787 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 788 { 789 struct slot *slot = hotplug_slot->private; 790 struct controller *ctrl = slot->ctrl; 791 792 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 793 794 *value = ctrl->speed; 795 796 return 0; 797 } 798 799 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 800 { 801 u8 num_of_slots = 0; 802 u8 hp_slot = 0; 803 u8 device; 804 u8 bus_cap; 805 u16 temp_word; 806 u16 vendor_id; 807 u16 subsystem_vid; 808 u16 subsystem_deviceid; 809 u32 rc; 810 struct controller *ctrl; 811 struct pci_func *func; 812 int err; 813 814 err = pci_enable_device(pdev); 815 if (err) { 816 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", 817 pci_name(pdev), err); 818 return err; 819 } 820 821 // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery 822 rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); 823 if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { 824 err(msg_HPC_non_compaq_or_intel); 825 rc = -ENODEV; 826 goto err_disable_device; 827 } 828 dbg("Vendor ID: %x\n", vendor_id); 829 830 dbg("revision: %d\n", pdev->revision); 831 if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) { 832 err(msg_HPC_rev_error); 833 rc = -ENODEV; 834 goto err_disable_device; 835 } 836 837 /* Check for the proper subsytem ID's 838 * Intel uses a different SSID programming model than Compaq. 839 * For Intel, each SSID bit identifies a PHP capability. 840 * Also Intel HPC's may have RID=0. 841 */ 842 if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { 843 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs 844 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); 845 if (rc) { 846 err("%s : pci_read_config_word failed\n", __func__); 847 goto err_disable_device; 848 } 849 dbg("Subsystem Vendor ID: %x\n", subsystem_vid); 850 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { 851 err(msg_HPC_non_compaq_or_intel); 852 rc = -ENODEV; 853 goto err_disable_device; 854 } 855 856 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL); 857 if (!ctrl) { 858 err("%s : out of memory\n", __func__); 859 rc = -ENOMEM; 860 goto err_disable_device; 861 } 862 863 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); 864 if (rc) { 865 err("%s : pci_read_config_word failed\n", __func__); 866 goto err_free_ctrl; 867 } 868 869 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); 870 871 /* Set Vendor ID, so it can be accessed later from other functions */ 872 ctrl->vendor_id = vendor_id; 873 874 switch (subsystem_vid) { 875 case PCI_VENDOR_ID_COMPAQ: 876 if (pdev->revision >= 0x13) { /* CIOBX */ 877 ctrl->push_flag = 1; 878 ctrl->slot_switch_type = 1; 879 ctrl->push_button = 1; 880 ctrl->pci_config_space = 1; 881 ctrl->defeature_PHP = 1; 882 ctrl->pcix_support = 1; 883 ctrl->pcix_speed_capability = 1; 884 pci_read_config_byte(pdev, 0x41, &bus_cap); 885 if (bus_cap & 0x80) { 886 dbg("bus max supports 133MHz PCI-X\n"); 887 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; 888 break; 889 } 890 if (bus_cap & 0x40) { 891 dbg("bus max supports 100MHz PCI-X\n"); 892 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 893 break; 894 } 895 if (bus_cap & 20) { 896 dbg("bus max supports 66MHz PCI-X\n"); 897 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; 898 break; 899 } 900 if (bus_cap & 10) { 901 dbg("bus max supports 66MHz PCI\n"); 902 ctrl->speed_capability = PCI_SPEED_66MHz; 903 break; 904 } 905 906 break; 907 } 908 909 switch (subsystem_deviceid) { 910 case PCI_SUB_HPC_ID: 911 /* Original 6500/7000 implementation */ 912 ctrl->slot_switch_type = 1; 913 ctrl->speed_capability = PCI_SPEED_33MHz; 914 ctrl->push_button = 0; 915 ctrl->pci_config_space = 1; 916 ctrl->defeature_PHP = 1; 917 ctrl->pcix_support = 0; 918 ctrl->pcix_speed_capability = 0; 919 break; 920 case PCI_SUB_HPC_ID2: 921 /* First Pushbutton implementation */ 922 ctrl->push_flag = 1; 923 ctrl->slot_switch_type = 1; 924 ctrl->speed_capability = PCI_SPEED_33MHz; 925 ctrl->push_button = 1; 926 ctrl->pci_config_space = 1; 927 ctrl->defeature_PHP = 1; 928 ctrl->pcix_support = 0; 929 ctrl->pcix_speed_capability = 0; 930 break; 931 case PCI_SUB_HPC_ID_INTC: 932 /* Third party (6500/7000) */ 933 ctrl->slot_switch_type = 1; 934 ctrl->speed_capability = PCI_SPEED_33MHz; 935 ctrl->push_button = 0; 936 ctrl->pci_config_space = 1; 937 ctrl->defeature_PHP = 1; 938 ctrl->pcix_support = 0; 939 ctrl->pcix_speed_capability = 0; 940 break; 941 case PCI_SUB_HPC_ID3: 942 /* First 66 Mhz implementation */ 943 ctrl->push_flag = 1; 944 ctrl->slot_switch_type = 1; 945 ctrl->speed_capability = PCI_SPEED_66MHz; 946 ctrl->push_button = 1; 947 ctrl->pci_config_space = 1; 948 ctrl->defeature_PHP = 1; 949 ctrl->pcix_support = 0; 950 ctrl->pcix_speed_capability = 0; 951 break; 952 case PCI_SUB_HPC_ID4: 953 /* First PCI-X implementation, 100MHz */ 954 ctrl->push_flag = 1; 955 ctrl->slot_switch_type = 1; 956 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 957 ctrl->push_button = 1; 958 ctrl->pci_config_space = 1; 959 ctrl->defeature_PHP = 1; 960 ctrl->pcix_support = 1; 961 ctrl->pcix_speed_capability = 0; 962 break; 963 default: 964 err(msg_HPC_not_supported); 965 rc = -ENODEV; 966 goto err_free_ctrl; 967 } 968 break; 969 970 case PCI_VENDOR_ID_INTEL: 971 /* Check for speed capability (0=33, 1=66) */ 972 if (subsystem_deviceid & 0x0001) { 973 ctrl->speed_capability = PCI_SPEED_66MHz; 974 } else { 975 ctrl->speed_capability = PCI_SPEED_33MHz; 976 } 977 978 /* Check for push button */ 979 if (subsystem_deviceid & 0x0002) { 980 /* no push button */ 981 ctrl->push_button = 0; 982 } else { 983 /* push button supported */ 984 ctrl->push_button = 1; 985 } 986 987 /* Check for slot switch type (0=mechanical, 1=not mechanical) */ 988 if (subsystem_deviceid & 0x0004) { 989 /* no switch */ 990 ctrl->slot_switch_type = 0; 991 } else { 992 /* switch */ 993 ctrl->slot_switch_type = 1; 994 } 995 996 /* PHP Status (0=De-feature PHP, 1=Normal operation) */ 997 if (subsystem_deviceid & 0x0008) { 998 ctrl->defeature_PHP = 1; // PHP supported 999 } else { 1000 ctrl->defeature_PHP = 0; // PHP not supported 1001 } 1002 1003 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ 1004 if (subsystem_deviceid & 0x0010) { 1005 ctrl->alternate_base_address = 1; // supported 1006 } else { 1007 ctrl->alternate_base_address = 0; // not supported 1008 } 1009 1010 /* PCI Config Space Index (0=not supported, 1=supported) */ 1011 if (subsystem_deviceid & 0x0020) { 1012 ctrl->pci_config_space = 1; // supported 1013 } else { 1014 ctrl->pci_config_space = 0; // not supported 1015 } 1016 1017 /* PCI-X support */ 1018 if (subsystem_deviceid & 0x0080) { 1019 /* PCI-X capable */ 1020 ctrl->pcix_support = 1; 1021 /* Frequency of operation in PCI-X mode */ 1022 if (subsystem_deviceid & 0x0040) { 1023 /* 133MHz PCI-X if bit 7 is 1 */ 1024 ctrl->pcix_speed_capability = 1; 1025 } else { 1026 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ 1027 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ 1028 ctrl->pcix_speed_capability = 0; 1029 } 1030 } else { 1031 /* Conventional PCI */ 1032 ctrl->pcix_support = 0; 1033 ctrl->pcix_speed_capability = 0; 1034 } 1035 break; 1036 1037 default: 1038 err(msg_HPC_not_supported); 1039 rc = -ENODEV; 1040 goto err_free_ctrl; 1041 } 1042 1043 } else { 1044 err(msg_HPC_not_supported); 1045 return -ENODEV; 1046 } 1047 1048 // Tell the user that we found one. 1049 info("Initializing the PCI hot plug controller residing on PCI bus %d\n", 1050 pdev->bus->number); 1051 1052 dbg("Hotplug controller capabilities:\n"); 1053 dbg(" speed_capability %d\n", ctrl->speed_capability); 1054 dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? 1055 "switch present" : "no switch"); 1056 dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? 1057 "PHP supported" : "PHP not supported"); 1058 dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? 1059 "supported" : "not supported"); 1060 dbg(" pci_config_space %s\n", ctrl->pci_config_space ? 1061 "supported" : "not supported"); 1062 dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? 1063 "supported" : "not supported"); 1064 dbg(" pcix_support %s\n", ctrl->pcix_support ? 1065 "supported" : "not supported"); 1066 1067 ctrl->pci_dev = pdev; 1068 pci_set_drvdata(pdev, ctrl); 1069 1070 /* make our own copy of the pci bus structure, 1071 * as we like tweaking it a lot */ 1072 ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); 1073 if (!ctrl->pci_bus) { 1074 err("out of memory\n"); 1075 rc = -ENOMEM; 1076 goto err_free_ctrl; 1077 } 1078 memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); 1079 1080 ctrl->bus = pdev->bus->number; 1081 ctrl->rev = pdev->revision; 1082 dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, 1083 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); 1084 1085 mutex_init(&ctrl->crit_sect); 1086 init_waitqueue_head(&ctrl->queue); 1087 1088 /* initialize our threads if they haven't already been started up */ 1089 rc = one_time_init(); 1090 if (rc) { 1091 goto err_free_bus; 1092 } 1093 1094 dbg("pdev = %p\n", pdev); 1095 dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0)); 1096 dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0)); 1097 1098 if (!request_mem_region(pci_resource_start(pdev, 0), 1099 pci_resource_len(pdev, 0), MY_NAME)) { 1100 err("cannot reserve MMIO region\n"); 1101 rc = -ENOMEM; 1102 goto err_free_bus; 1103 } 1104 1105 ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), 1106 pci_resource_len(pdev, 0)); 1107 if (!ctrl->hpc_reg) { 1108 err("cannot remap MMIO region %llx @ %llx\n", 1109 (unsigned long long)pci_resource_len(pdev, 0), 1110 (unsigned long long)pci_resource_start(pdev, 0)); 1111 rc = -ENODEV; 1112 goto err_free_mem_region; 1113 } 1114 1115 // Check for 66Mhz operation 1116 ctrl->speed = get_controller_speed(ctrl); 1117 1118 1119 /******************************************************** 1120 * 1121 * Save configuration headers for this and 1122 * subordinate PCI buses 1123 * 1124 ********************************************************/ 1125 1126 // find the physical slot number of the first hot plug slot 1127 1128 /* Get slot won't work for devices behind bridges, but 1129 * in this case it will always be called for the "base" 1130 * bus/dev/func of a slot. 1131 * CS: this is leveraging the PCIIRQ routing code from the kernel 1132 * (pci-pc.c: get_irq_routing_table) */ 1133 rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, 1134 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), 1135 &(ctrl->first_slot)); 1136 dbg("get_slot_mapping: first_slot = %d, returned = %d\n", 1137 ctrl->first_slot, rc); 1138 if (rc) { 1139 err(msg_initialization_err, rc); 1140 goto err_iounmap; 1141 } 1142 1143 // Store PCI Config Space for all devices on this bus 1144 rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); 1145 if (rc) { 1146 err("%s: unable to save PCI configuration data, error %d\n", 1147 __func__, rc); 1148 goto err_iounmap; 1149 } 1150 1151 /* 1152 * Get IO, memory, and IRQ resources for new devices 1153 */ 1154 // The next line is required for cpqhp_find_available_resources 1155 ctrl->interrupt = pdev->irq; 1156 if (ctrl->interrupt < 0x10) { 1157 cpqhp_legacy_mode = 1; 1158 dbg("System seems to be configured for Full Table Mapped MPS mode\n"); 1159 } 1160 1161 ctrl->cfgspc_irq = 0; 1162 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); 1163 1164 rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); 1165 ctrl->add_support = !rc; 1166 if (rc) { 1167 dbg("cpqhp_find_available_resources = 0x%x\n", rc); 1168 err("unable to locate PCI configuration resources for hot plug add.\n"); 1169 goto err_iounmap; 1170 } 1171 1172 /* 1173 * Finish setting up the hot plug ctrl device 1174 */ 1175 ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1176 dbg("NumSlots %d \n", ctrl->slot_device_offset); 1177 1178 ctrl->next_event = 0; 1179 1180 /* Setup the slot information structures */ 1181 rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); 1182 if (rc) { 1183 err(msg_initialization_err, 6); 1184 err("%s: unable to save PCI configuration data, error %d\n", 1185 __func__, rc); 1186 goto err_iounmap; 1187 } 1188 1189 /* Mask all general input interrupts */ 1190 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); 1191 1192 /* set up the interrupt */ 1193 dbg("HPC interrupt = %d \n", ctrl->interrupt); 1194 if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, 1195 IRQF_SHARED, MY_NAME, ctrl)) { 1196 err("Can't get irq %d for the hotplug pci controller\n", 1197 ctrl->interrupt); 1198 rc = -ENODEV; 1199 goto err_iounmap; 1200 } 1201 1202 /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ 1203 temp_word = readw(ctrl->hpc_reg + MISC); 1204 temp_word |= 0x4006; 1205 writew(temp_word, ctrl->hpc_reg + MISC); 1206 1207 // Changed 05/05/97 to clear all interrupts at start 1208 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); 1209 1210 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 1211 1212 writel(0x0L, ctrl->hpc_reg + INT_MASK); 1213 1214 if (!cpqhp_ctrl_list) { 1215 cpqhp_ctrl_list = ctrl; 1216 ctrl->next = NULL; 1217 } else { 1218 ctrl->next = cpqhp_ctrl_list; 1219 cpqhp_ctrl_list = ctrl; 1220 } 1221 1222 // turn off empty slots here unless command line option "ON" set 1223 // Wait for exclusive access to hardware 1224 mutex_lock(&ctrl->crit_sect); 1225 1226 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 1227 1228 // find first device number for the ctrl 1229 device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1230 1231 while (num_of_slots) { 1232 dbg("num_of_slots: %d\n", num_of_slots); 1233 func = cpqhp_slot_find(ctrl->bus, device, 0); 1234 if (!func) 1235 break; 1236 1237 hp_slot = func->device - ctrl->slot_device_offset; 1238 dbg("hp_slot: %d\n", hp_slot); 1239 1240 // We have to save the presence info for these slots 1241 temp_word = ctrl->ctrl_int_comp >> 16; 1242 func->presence_save = (temp_word >> hp_slot) & 0x01; 1243 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; 1244 1245 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { 1246 func->switch_save = 0; 1247 } else { 1248 func->switch_save = 0x10; 1249 } 1250 1251 if (!power_mode) { 1252 if (!func->is_a_board) { 1253 green_LED_off(ctrl, hp_slot); 1254 slot_disable(ctrl, hp_slot); 1255 } 1256 } 1257 1258 device++; 1259 num_of_slots--; 1260 } 1261 1262 if (!power_mode) { 1263 set_SOGO(ctrl); 1264 // Wait for SOBS to be unset 1265 wait_for_ctrl_irq(ctrl); 1266 } 1267 1268 rc = init_SERR(ctrl); 1269 if (rc) { 1270 err("init_SERR failed\n"); 1271 mutex_unlock(&ctrl->crit_sect); 1272 goto err_free_irq; 1273 } 1274 1275 // Done with exclusive hardware access 1276 mutex_unlock(&ctrl->crit_sect); 1277 1278 cpqhp_create_debugfs_files(ctrl); 1279 1280 return 0; 1281 1282 err_free_irq: 1283 free_irq(ctrl->interrupt, ctrl); 1284 err_iounmap: 1285 iounmap(ctrl->hpc_reg); 1286 err_free_mem_region: 1287 release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 1288 err_free_bus: 1289 kfree(ctrl->pci_bus); 1290 err_free_ctrl: 1291 kfree(ctrl); 1292 err_disable_device: 1293 pci_disable_device(pdev); 1294 return rc; 1295 } 1296 1297 1298 static int one_time_init(void) 1299 { 1300 int loop; 1301 int retval = 0; 1302 1303 if (initialized) 1304 return 0; 1305 1306 power_mode = 0; 1307 1308 retval = pci_print_IRQ_route(); 1309 if (retval) 1310 goto error; 1311 1312 dbg("Initialize + Start the notification mechanism \n"); 1313 1314 retval = cpqhp_event_start_thread(); 1315 if (retval) 1316 goto error; 1317 1318 dbg("Initialize slot lists\n"); 1319 for (loop = 0; loop < 256; loop++) { 1320 cpqhp_slot_list[loop] = NULL; 1321 } 1322 1323 // FIXME: We also need to hook the NMI handler eventually. 1324 // this also needs to be worked with Christoph 1325 // register_NMI_handler(); 1326 1327 // Map rom address 1328 cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); 1329 if (!cpqhp_rom_start) { 1330 err ("Could not ioremap memory region for ROM\n"); 1331 retval = -EIO; 1332 goto error; 1333 } 1334 1335 /* Now, map the int15 entry point if we are on compaq specific hardware */ 1336 compaq_nvram_init(cpqhp_rom_start); 1337 1338 /* Map smbios table entry point structure */ 1339 smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, 1340 cpqhp_rom_start + ROM_PHY_LEN); 1341 if (!smbios_table) { 1342 err ("Could not find the SMBIOS pointer in memory\n"); 1343 retval = -EIO; 1344 goto error_rom_start; 1345 } 1346 1347 smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), 1348 readw(smbios_table + ST_LENGTH)); 1349 if (!smbios_start) { 1350 err ("Could not ioremap memory region taken from SMBIOS values\n"); 1351 retval = -EIO; 1352 goto error_smbios_start; 1353 } 1354 1355 initialized = 1; 1356 1357 return retval; 1358 1359 error_smbios_start: 1360 iounmap(smbios_start); 1361 error_rom_start: 1362 iounmap(cpqhp_rom_start); 1363 error: 1364 return retval; 1365 } 1366 1367 1368 static void __exit unload_cpqphpd(void) 1369 { 1370 struct pci_func *next; 1371 struct pci_func *TempSlot; 1372 int loop; 1373 u32 rc; 1374 struct controller *ctrl; 1375 struct controller *tctrl; 1376 struct pci_resource *res; 1377 struct pci_resource *tres; 1378 1379 rc = compaq_nvram_store(cpqhp_rom_start); 1380 1381 ctrl = cpqhp_ctrl_list; 1382 1383 while (ctrl) { 1384 if (ctrl->hpc_reg) { 1385 u16 misc; 1386 rc = read_slot_enable (ctrl); 1387 1388 writeb(0, ctrl->hpc_reg + SLOT_SERR); 1389 writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); 1390 1391 misc = readw(ctrl->hpc_reg + MISC); 1392 misc &= 0xFFFD; 1393 writew(misc, ctrl->hpc_reg + MISC); 1394 } 1395 1396 ctrl_slot_cleanup(ctrl); 1397 1398 res = ctrl->io_head; 1399 while (res) { 1400 tres = res; 1401 res = res->next; 1402 kfree(tres); 1403 } 1404 1405 res = ctrl->mem_head; 1406 while (res) { 1407 tres = res; 1408 res = res->next; 1409 kfree(tres); 1410 } 1411 1412 res = ctrl->p_mem_head; 1413 while (res) { 1414 tres = res; 1415 res = res->next; 1416 kfree(tres); 1417 } 1418 1419 res = ctrl->bus_head; 1420 while (res) { 1421 tres = res; 1422 res = res->next; 1423 kfree(tres); 1424 } 1425 1426 kfree (ctrl->pci_bus); 1427 1428 tctrl = ctrl; 1429 ctrl = ctrl->next; 1430 kfree(tctrl); 1431 } 1432 1433 for (loop = 0; loop < 256; loop++) { 1434 next = cpqhp_slot_list[loop]; 1435 while (next != NULL) { 1436 res = next->io_head; 1437 while (res) { 1438 tres = res; 1439 res = res->next; 1440 kfree(tres); 1441 } 1442 1443 res = next->mem_head; 1444 while (res) { 1445 tres = res; 1446 res = res->next; 1447 kfree(tres); 1448 } 1449 1450 res = next->p_mem_head; 1451 while (res) { 1452 tres = res; 1453 res = res->next; 1454 kfree(tres); 1455 } 1456 1457 res = next->bus_head; 1458 while (res) { 1459 tres = res; 1460 res = res->next; 1461 kfree(tres); 1462 } 1463 1464 TempSlot = next; 1465 next = next->next; 1466 kfree(TempSlot); 1467 } 1468 } 1469 1470 // Stop the notification mechanism 1471 if (initialized) 1472 cpqhp_event_stop_thread(); 1473 1474 //unmap the rom address 1475 if (cpqhp_rom_start) 1476 iounmap(cpqhp_rom_start); 1477 if (smbios_start) 1478 iounmap(smbios_start); 1479 } 1480 1481 1482 1483 static struct pci_device_id hpcd_pci_tbl[] = { 1484 { 1485 /* handle any PCI Hotplug controller */ 1486 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1487 .class_mask = ~0, 1488 1489 /* no matter who makes it */ 1490 .vendor = PCI_ANY_ID, 1491 .device = PCI_ANY_ID, 1492 .subvendor = PCI_ANY_ID, 1493 .subdevice = PCI_ANY_ID, 1494 1495 }, { /* end: all zeroes */ } 1496 }; 1497 1498 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); 1499 1500 1501 1502 static struct pci_driver cpqhpc_driver = { 1503 .name = "compaq_pci_hotplug", 1504 .id_table = hpcd_pci_tbl, 1505 .probe = cpqhpc_probe, 1506 /* remove: cpqhpc_remove_one, */ 1507 }; 1508 1509 1510 1511 static int __init cpqhpc_init(void) 1512 { 1513 int result; 1514 1515 cpqhp_debug = debug; 1516 1517 info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); 1518 cpqhp_initialize_debugfs(); 1519 result = pci_register_driver(&cpqhpc_driver); 1520 dbg("pci_register_driver = %d\n", result); 1521 return result; 1522 } 1523 1524 1525 static void __exit cpqhpc_cleanup(void) 1526 { 1527 dbg("unload_cpqphpd()\n"); 1528 unload_cpqphpd(); 1529 1530 dbg("pci_unregister_driver\n"); 1531 pci_unregister_driver(&cpqhpc_driver); 1532 cpqhp_shutdown_debugfs(); 1533 } 1534 1535 1536 module_init(cpqhpc_init); 1537 module_exit(cpqhpc_cleanup); 1538 1539 1540