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 if (result) { 439 err("pci_hp_register failed with error %d\n", result); 440 goto error_name; 441 } 442 443 slot->next = ctrl->slot; 444 ctrl->slot = slot; 445 446 number_of_slots--; 447 slot_device++; 448 slot_number++; 449 } 450 451 return 0; 452 error_name: 453 kfree(hotplug_slot->name); 454 error_info: 455 kfree(hotplug_slot_info); 456 error_hpslot: 457 kfree(hotplug_slot); 458 error_slot: 459 kfree(slot); 460 error: 461 return result; 462 } 463 464 static int ctrl_slot_cleanup (struct controller * ctrl) 465 { 466 struct slot *old_slot, *next_slot; 467 468 old_slot = ctrl->slot; 469 ctrl->slot = NULL; 470 471 while (old_slot) { 472 /* memory will be freed by the release_slot callback */ 473 next_slot = old_slot->next; 474 pci_hp_deregister (old_slot->hotplug_slot); 475 old_slot = next_slot; 476 } 477 478 cpqhp_remove_debugfs_files(ctrl); 479 480 //Free IRQ associated with hot plug device 481 free_irq(ctrl->interrupt, ctrl); 482 //Unmap the memory 483 iounmap(ctrl->hpc_reg); 484 //Finally reclaim PCI mem 485 release_mem_region(pci_resource_start(ctrl->pci_dev, 0), 486 pci_resource_len(ctrl->pci_dev, 0)); 487 488 return(0); 489 } 490 491 492 //============================================================================ 493 // function: get_slot_mapping 494 // 495 // Description: Attempts to determine a logical slot mapping for a PCI 496 // device. Won't work for more than one PCI-PCI bridge 497 // in a slot. 498 // 499 // Input: u8 bus_num - bus number of PCI device 500 // u8 dev_num - device number of PCI device 501 // u8 *slot - Pointer to u8 where slot number will 502 // be returned 503 // 504 // Output: SUCCESS or FAILURE 505 //============================================================================= 506 static int 507 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) 508 { 509 struct irq_routing_table *PCIIRQRoutingInfoLength; 510 u32 work; 511 long len; 512 long loop; 513 514 u8 tbus, tdevice, tslot, bridgeSlot; 515 516 dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot); 517 518 bridgeSlot = 0xFF; 519 520 PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); 521 if (!PCIIRQRoutingInfoLength) 522 return -1; 523 524 len = (PCIIRQRoutingInfoLength->size - 525 sizeof(struct irq_routing_table)) / sizeof(struct irq_info); 526 // Make sure I got at least one entry 527 if (len == 0) { 528 kfree(PCIIRQRoutingInfoLength); 529 return -1; 530 } 531 532 for (loop = 0; loop < len; ++loop) { 533 tbus = PCIIRQRoutingInfoLength->slots[loop].bus; 534 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; 535 tslot = PCIIRQRoutingInfoLength->slots[loop].slot; 536 537 if ((tbus == bus_num) && (tdevice == dev_num)) { 538 *slot = tslot; 539 kfree(PCIIRQRoutingInfoLength); 540 return 0; 541 } else { 542 /* Did not get a match on the target PCI device. Check 543 * if the current IRQ table entry is a PCI-to-PCI bridge 544 * device. If so, and it's secondary bus matches the 545 * bus number for the target device, I need to save the 546 * bridge's slot number. If I can not find an entry for 547 * the target device, I will have to assume it's on the 548 * other side of the bridge, and assign it the bridge's 549 * slot. */ 550 bus->number = tbus; 551 pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), 552 PCI_CLASS_REVISION, &work); 553 554 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { 555 pci_bus_read_config_dword(bus, 556 PCI_DEVFN(tdevice, 0), 557 PCI_PRIMARY_BUS, &work); 558 // See if bridge's secondary bus matches target bus. 559 if (((work >> 8) & 0x000000FF) == (long) bus_num) { 560 bridgeSlot = tslot; 561 } 562 } 563 } 564 565 } 566 567 // If we got here, we didn't find an entry in the IRQ mapping table 568 // for the target PCI device. If we did determine that the target 569 // device is on the other side of a PCI-to-PCI bridge, return the 570 // slot number for the bridge. 571 if (bridgeSlot != 0xFF) { 572 *slot = bridgeSlot; 573 kfree(PCIIRQRoutingInfoLength); 574 return 0; 575 } 576 kfree(PCIIRQRoutingInfoLength); 577 // Couldn't find an entry in the routing table for this PCI device 578 return -1; 579 } 580 581 582 /** 583 * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off 584 * @ctrl: struct controller to use 585 * @func: PCI device/function info 586 * @status: LED control flag: 1 = LED on, 0 = LED off 587 */ 588 static int 589 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, 590 u32 status) 591 { 592 u8 hp_slot; 593 594 if (func == NULL) 595 return(1); 596 597 hp_slot = func->device - ctrl->slot_device_offset; 598 599 // Wait for exclusive access to hardware 600 mutex_lock(&ctrl->crit_sect); 601 602 if (status == 1) { 603 amber_LED_on (ctrl, hp_slot); 604 } else if (status == 0) { 605 amber_LED_off (ctrl, hp_slot); 606 } else { 607 // Done with exclusive hardware access 608 mutex_unlock(&ctrl->crit_sect); 609 return(1); 610 } 611 612 set_SOGO(ctrl); 613 614 // Wait for SOBS to be unset 615 wait_for_ctrl_irq (ctrl); 616 617 // Done with exclusive hardware access 618 mutex_unlock(&ctrl->crit_sect); 619 620 return(0); 621 } 622 623 624 /** 625 * set_attention_status - Turns the Amber LED for a slot on or off 626 * @hotplug_slot: slot to change LED on 627 * @status: LED control flag 628 */ 629 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) 630 { 631 struct pci_func *slot_func; 632 struct slot *slot = hotplug_slot->private; 633 struct controller *ctrl = slot->ctrl; 634 u8 bus; 635 u8 devfn; 636 u8 device; 637 u8 function; 638 639 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 640 641 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 642 return -ENODEV; 643 644 device = devfn >> 3; 645 function = devfn & 0x7; 646 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 647 648 slot_func = cpqhp_slot_find(bus, device, function); 649 if (!slot_func) 650 return -ENODEV; 651 652 return cpqhp_set_attention_status(ctrl, slot_func, status); 653 } 654 655 656 static int process_SI(struct hotplug_slot *hotplug_slot) 657 { 658 struct pci_func *slot_func; 659 struct slot *slot = hotplug_slot->private; 660 struct controller *ctrl = slot->ctrl; 661 u8 bus; 662 u8 devfn; 663 u8 device; 664 u8 function; 665 666 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 667 668 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 669 return -ENODEV; 670 671 device = devfn >> 3; 672 function = devfn & 0x7; 673 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 674 675 slot_func = cpqhp_slot_find(bus, device, function); 676 if (!slot_func) 677 return -ENODEV; 678 679 slot_func->bus = bus; 680 slot_func->device = device; 681 slot_func->function = function; 682 slot_func->configured = 0; 683 dbg("board_added(%p, %p)\n", slot_func, ctrl); 684 return cpqhp_process_SI(ctrl, slot_func); 685 } 686 687 688 static int process_SS(struct hotplug_slot *hotplug_slot) 689 { 690 struct pci_func *slot_func; 691 struct slot *slot = hotplug_slot->private; 692 struct controller *ctrl = slot->ctrl; 693 u8 bus; 694 u8 devfn; 695 u8 device; 696 u8 function; 697 698 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 699 700 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 701 return -ENODEV; 702 703 device = devfn >> 3; 704 function = devfn & 0x7; 705 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 706 707 slot_func = cpqhp_slot_find(bus, device, function); 708 if (!slot_func) 709 return -ENODEV; 710 711 dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl); 712 return cpqhp_process_SS(ctrl, slot_func); 713 } 714 715 716 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) 717 { 718 struct slot *slot = hotplug_slot->private; 719 struct controller *ctrl = slot->ctrl; 720 721 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 722 723 return cpqhp_hardware_test(ctrl, value); 724 } 725 726 727 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) 728 { 729 struct slot *slot = hotplug_slot->private; 730 struct controller *ctrl = slot->ctrl; 731 732 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 733 734 *value = get_slot_enabled(ctrl, slot); 735 return 0; 736 } 737 738 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) 739 { 740 struct slot *slot = hotplug_slot->private; 741 struct controller *ctrl = slot->ctrl; 742 743 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 744 745 *value = cpq_get_attention_status(ctrl, slot); 746 return 0; 747 } 748 749 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) 750 { 751 struct slot *slot = hotplug_slot->private; 752 struct controller *ctrl = slot->ctrl; 753 754 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 755 756 *value = cpq_get_latch_status(ctrl, slot); 757 758 return 0; 759 } 760 761 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) 762 { 763 struct slot *slot = hotplug_slot->private; 764 struct controller *ctrl = slot->ctrl; 765 766 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 767 768 *value = get_presence_status(ctrl, slot); 769 770 return 0; 771 } 772 773 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 774 { 775 struct slot *slot = hotplug_slot->private; 776 struct controller *ctrl = slot->ctrl; 777 778 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 779 780 *value = ctrl->speed_capability; 781 782 return 0; 783 } 784 785 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 786 { 787 struct slot *slot = hotplug_slot->private; 788 struct controller *ctrl = slot->ctrl; 789 790 dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); 791 792 *value = ctrl->speed; 793 794 return 0; 795 } 796 797 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 798 { 799 u8 num_of_slots = 0; 800 u8 hp_slot = 0; 801 u8 device; 802 u8 bus_cap; 803 u16 temp_word; 804 u16 vendor_id; 805 u16 subsystem_vid; 806 u16 subsystem_deviceid; 807 u32 rc; 808 struct controller *ctrl; 809 struct pci_func *func; 810 int err; 811 812 err = pci_enable_device(pdev); 813 if (err) { 814 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", 815 pci_name(pdev), err); 816 return err; 817 } 818 819 // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery 820 rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); 821 if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { 822 err(msg_HPC_non_compaq_or_intel); 823 rc = -ENODEV; 824 goto err_disable_device; 825 } 826 dbg("Vendor ID: %x\n", vendor_id); 827 828 dbg("revision: %d\n", pdev->revision); 829 if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) { 830 err(msg_HPC_rev_error); 831 rc = -ENODEV; 832 goto err_disable_device; 833 } 834 835 /* Check for the proper subsytem ID's 836 * Intel uses a different SSID programming model than Compaq. 837 * For Intel, each SSID bit identifies a PHP capability. 838 * Also Intel HPC's may have RID=0. 839 */ 840 if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { 841 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs 842 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); 843 if (rc) { 844 err("%s : pci_read_config_word failed\n", __func__); 845 goto err_disable_device; 846 } 847 dbg("Subsystem Vendor ID: %x\n", subsystem_vid); 848 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { 849 err(msg_HPC_non_compaq_or_intel); 850 rc = -ENODEV; 851 goto err_disable_device; 852 } 853 854 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL); 855 if (!ctrl) { 856 err("%s : out of memory\n", __func__); 857 rc = -ENOMEM; 858 goto err_disable_device; 859 } 860 861 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); 862 if (rc) { 863 err("%s : pci_read_config_word failed\n", __func__); 864 goto err_free_ctrl; 865 } 866 867 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); 868 869 /* Set Vendor ID, so it can be accessed later from other functions */ 870 ctrl->vendor_id = vendor_id; 871 872 switch (subsystem_vid) { 873 case PCI_VENDOR_ID_COMPAQ: 874 if (pdev->revision >= 0x13) { /* CIOBX */ 875 ctrl->push_flag = 1; 876 ctrl->slot_switch_type = 1; 877 ctrl->push_button = 1; 878 ctrl->pci_config_space = 1; 879 ctrl->defeature_PHP = 1; 880 ctrl->pcix_support = 1; 881 ctrl->pcix_speed_capability = 1; 882 pci_read_config_byte(pdev, 0x41, &bus_cap); 883 if (bus_cap & 0x80) { 884 dbg("bus max supports 133MHz PCI-X\n"); 885 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; 886 break; 887 } 888 if (bus_cap & 0x40) { 889 dbg("bus max supports 100MHz PCI-X\n"); 890 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 891 break; 892 } 893 if (bus_cap & 20) { 894 dbg("bus max supports 66MHz PCI-X\n"); 895 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; 896 break; 897 } 898 if (bus_cap & 10) { 899 dbg("bus max supports 66MHz PCI\n"); 900 ctrl->speed_capability = PCI_SPEED_66MHz; 901 break; 902 } 903 904 break; 905 } 906 907 switch (subsystem_deviceid) { 908 case PCI_SUB_HPC_ID: 909 /* Original 6500/7000 implementation */ 910 ctrl->slot_switch_type = 1; 911 ctrl->speed_capability = PCI_SPEED_33MHz; 912 ctrl->push_button = 0; 913 ctrl->pci_config_space = 1; 914 ctrl->defeature_PHP = 1; 915 ctrl->pcix_support = 0; 916 ctrl->pcix_speed_capability = 0; 917 break; 918 case PCI_SUB_HPC_ID2: 919 /* First Pushbutton implementation */ 920 ctrl->push_flag = 1; 921 ctrl->slot_switch_type = 1; 922 ctrl->speed_capability = PCI_SPEED_33MHz; 923 ctrl->push_button = 1; 924 ctrl->pci_config_space = 1; 925 ctrl->defeature_PHP = 1; 926 ctrl->pcix_support = 0; 927 ctrl->pcix_speed_capability = 0; 928 break; 929 case PCI_SUB_HPC_ID_INTC: 930 /* Third party (6500/7000) */ 931 ctrl->slot_switch_type = 1; 932 ctrl->speed_capability = PCI_SPEED_33MHz; 933 ctrl->push_button = 0; 934 ctrl->pci_config_space = 1; 935 ctrl->defeature_PHP = 1; 936 ctrl->pcix_support = 0; 937 ctrl->pcix_speed_capability = 0; 938 break; 939 case PCI_SUB_HPC_ID3: 940 /* First 66 Mhz implementation */ 941 ctrl->push_flag = 1; 942 ctrl->slot_switch_type = 1; 943 ctrl->speed_capability = PCI_SPEED_66MHz; 944 ctrl->push_button = 1; 945 ctrl->pci_config_space = 1; 946 ctrl->defeature_PHP = 1; 947 ctrl->pcix_support = 0; 948 ctrl->pcix_speed_capability = 0; 949 break; 950 case PCI_SUB_HPC_ID4: 951 /* First PCI-X implementation, 100MHz */ 952 ctrl->push_flag = 1; 953 ctrl->slot_switch_type = 1; 954 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 955 ctrl->push_button = 1; 956 ctrl->pci_config_space = 1; 957 ctrl->defeature_PHP = 1; 958 ctrl->pcix_support = 1; 959 ctrl->pcix_speed_capability = 0; 960 break; 961 default: 962 err(msg_HPC_not_supported); 963 rc = -ENODEV; 964 goto err_free_ctrl; 965 } 966 break; 967 968 case PCI_VENDOR_ID_INTEL: 969 /* Check for speed capability (0=33, 1=66) */ 970 if (subsystem_deviceid & 0x0001) { 971 ctrl->speed_capability = PCI_SPEED_66MHz; 972 } else { 973 ctrl->speed_capability = PCI_SPEED_33MHz; 974 } 975 976 /* Check for push button */ 977 if (subsystem_deviceid & 0x0002) { 978 /* no push button */ 979 ctrl->push_button = 0; 980 } else { 981 /* push button supported */ 982 ctrl->push_button = 1; 983 } 984 985 /* Check for slot switch type (0=mechanical, 1=not mechanical) */ 986 if (subsystem_deviceid & 0x0004) { 987 /* no switch */ 988 ctrl->slot_switch_type = 0; 989 } else { 990 /* switch */ 991 ctrl->slot_switch_type = 1; 992 } 993 994 /* PHP Status (0=De-feature PHP, 1=Normal operation) */ 995 if (subsystem_deviceid & 0x0008) { 996 ctrl->defeature_PHP = 1; // PHP supported 997 } else { 998 ctrl->defeature_PHP = 0; // PHP not supported 999 } 1000 1001 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ 1002 if (subsystem_deviceid & 0x0010) { 1003 ctrl->alternate_base_address = 1; // supported 1004 } else { 1005 ctrl->alternate_base_address = 0; // not supported 1006 } 1007 1008 /* PCI Config Space Index (0=not supported, 1=supported) */ 1009 if (subsystem_deviceid & 0x0020) { 1010 ctrl->pci_config_space = 1; // supported 1011 } else { 1012 ctrl->pci_config_space = 0; // not supported 1013 } 1014 1015 /* PCI-X support */ 1016 if (subsystem_deviceid & 0x0080) { 1017 /* PCI-X capable */ 1018 ctrl->pcix_support = 1; 1019 /* Frequency of operation in PCI-X mode */ 1020 if (subsystem_deviceid & 0x0040) { 1021 /* 133MHz PCI-X if bit 7 is 1 */ 1022 ctrl->pcix_speed_capability = 1; 1023 } else { 1024 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ 1025 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ 1026 ctrl->pcix_speed_capability = 0; 1027 } 1028 } else { 1029 /* Conventional PCI */ 1030 ctrl->pcix_support = 0; 1031 ctrl->pcix_speed_capability = 0; 1032 } 1033 break; 1034 1035 default: 1036 err(msg_HPC_not_supported); 1037 rc = -ENODEV; 1038 goto err_free_ctrl; 1039 } 1040 1041 } else { 1042 err(msg_HPC_not_supported); 1043 return -ENODEV; 1044 } 1045 1046 // Tell the user that we found one. 1047 info("Initializing the PCI hot plug controller residing on PCI bus %d\n", 1048 pdev->bus->number); 1049 1050 dbg("Hotplug controller capabilities:\n"); 1051 dbg(" speed_capability %d\n", ctrl->speed_capability); 1052 dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? 1053 "switch present" : "no switch"); 1054 dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? 1055 "PHP supported" : "PHP not supported"); 1056 dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? 1057 "supported" : "not supported"); 1058 dbg(" pci_config_space %s\n", ctrl->pci_config_space ? 1059 "supported" : "not supported"); 1060 dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? 1061 "supported" : "not supported"); 1062 dbg(" pcix_support %s\n", ctrl->pcix_support ? 1063 "supported" : "not supported"); 1064 1065 ctrl->pci_dev = pdev; 1066 pci_set_drvdata(pdev, ctrl); 1067 1068 /* make our own copy of the pci bus structure, 1069 * as we like tweaking it a lot */ 1070 ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); 1071 if (!ctrl->pci_bus) { 1072 err("out of memory\n"); 1073 rc = -ENOMEM; 1074 goto err_free_ctrl; 1075 } 1076 memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); 1077 1078 ctrl->bus = pdev->bus->number; 1079 ctrl->rev = pdev->revision; 1080 dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, 1081 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); 1082 1083 mutex_init(&ctrl->crit_sect); 1084 init_waitqueue_head(&ctrl->queue); 1085 1086 /* initialize our threads if they haven't already been started up */ 1087 rc = one_time_init(); 1088 if (rc) { 1089 goto err_free_bus; 1090 } 1091 1092 dbg("pdev = %p\n", pdev); 1093 dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0)); 1094 dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0)); 1095 1096 if (!request_mem_region(pci_resource_start(pdev, 0), 1097 pci_resource_len(pdev, 0), MY_NAME)) { 1098 err("cannot reserve MMIO region\n"); 1099 rc = -ENOMEM; 1100 goto err_free_bus; 1101 } 1102 1103 ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), 1104 pci_resource_len(pdev, 0)); 1105 if (!ctrl->hpc_reg) { 1106 err("cannot remap MMIO region %llx @ %llx\n", 1107 (unsigned long long)pci_resource_len(pdev, 0), 1108 (unsigned long long)pci_resource_start(pdev, 0)); 1109 rc = -ENODEV; 1110 goto err_free_mem_region; 1111 } 1112 1113 // Check for 66Mhz operation 1114 ctrl->speed = get_controller_speed(ctrl); 1115 1116 1117 /******************************************************** 1118 * 1119 * Save configuration headers for this and 1120 * subordinate PCI buses 1121 * 1122 ********************************************************/ 1123 1124 // find the physical slot number of the first hot plug slot 1125 1126 /* Get slot won't work for devices behind bridges, but 1127 * in this case it will always be called for the "base" 1128 * bus/dev/func of a slot. 1129 * CS: this is leveraging the PCIIRQ routing code from the kernel 1130 * (pci-pc.c: get_irq_routing_table) */ 1131 rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, 1132 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), 1133 &(ctrl->first_slot)); 1134 dbg("get_slot_mapping: first_slot = %d, returned = %d\n", 1135 ctrl->first_slot, rc); 1136 if (rc) { 1137 err(msg_initialization_err, rc); 1138 goto err_iounmap; 1139 } 1140 1141 // Store PCI Config Space for all devices on this bus 1142 rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); 1143 if (rc) { 1144 err("%s: unable to save PCI configuration data, error %d\n", 1145 __func__, rc); 1146 goto err_iounmap; 1147 } 1148 1149 /* 1150 * Get IO, memory, and IRQ resources for new devices 1151 */ 1152 // The next line is required for cpqhp_find_available_resources 1153 ctrl->interrupt = pdev->irq; 1154 if (ctrl->interrupt < 0x10) { 1155 cpqhp_legacy_mode = 1; 1156 dbg("System seems to be configured for Full Table Mapped MPS mode\n"); 1157 } 1158 1159 ctrl->cfgspc_irq = 0; 1160 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); 1161 1162 rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); 1163 ctrl->add_support = !rc; 1164 if (rc) { 1165 dbg("cpqhp_find_available_resources = 0x%x\n", rc); 1166 err("unable to locate PCI configuration resources for hot plug add.\n"); 1167 goto err_iounmap; 1168 } 1169 1170 /* 1171 * Finish setting up the hot plug ctrl device 1172 */ 1173 ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1174 dbg("NumSlots %d \n", ctrl->slot_device_offset); 1175 1176 ctrl->next_event = 0; 1177 1178 /* Setup the slot information structures */ 1179 rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); 1180 if (rc) { 1181 err(msg_initialization_err, 6); 1182 err("%s: unable to save PCI configuration data, error %d\n", 1183 __func__, rc); 1184 goto err_iounmap; 1185 } 1186 1187 /* Mask all general input interrupts */ 1188 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); 1189 1190 /* set up the interrupt */ 1191 dbg("HPC interrupt = %d \n", ctrl->interrupt); 1192 if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, 1193 IRQF_SHARED, MY_NAME, ctrl)) { 1194 err("Can't get irq %d for the hotplug pci controller\n", 1195 ctrl->interrupt); 1196 rc = -ENODEV; 1197 goto err_iounmap; 1198 } 1199 1200 /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ 1201 temp_word = readw(ctrl->hpc_reg + MISC); 1202 temp_word |= 0x4006; 1203 writew(temp_word, ctrl->hpc_reg + MISC); 1204 1205 // Changed 05/05/97 to clear all interrupts at start 1206 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); 1207 1208 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 1209 1210 writel(0x0L, ctrl->hpc_reg + INT_MASK); 1211 1212 if (!cpqhp_ctrl_list) { 1213 cpqhp_ctrl_list = ctrl; 1214 ctrl->next = NULL; 1215 } else { 1216 ctrl->next = cpqhp_ctrl_list; 1217 cpqhp_ctrl_list = ctrl; 1218 } 1219 1220 // turn off empty slots here unless command line option "ON" set 1221 // Wait for exclusive access to hardware 1222 mutex_lock(&ctrl->crit_sect); 1223 1224 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 1225 1226 // find first device number for the ctrl 1227 device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1228 1229 while (num_of_slots) { 1230 dbg("num_of_slots: %d\n", num_of_slots); 1231 func = cpqhp_slot_find(ctrl->bus, device, 0); 1232 if (!func) 1233 break; 1234 1235 hp_slot = func->device - ctrl->slot_device_offset; 1236 dbg("hp_slot: %d\n", hp_slot); 1237 1238 // We have to save the presence info for these slots 1239 temp_word = ctrl->ctrl_int_comp >> 16; 1240 func->presence_save = (temp_word >> hp_slot) & 0x01; 1241 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; 1242 1243 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { 1244 func->switch_save = 0; 1245 } else { 1246 func->switch_save = 0x10; 1247 } 1248 1249 if (!power_mode) { 1250 if (!func->is_a_board) { 1251 green_LED_off(ctrl, hp_slot); 1252 slot_disable(ctrl, hp_slot); 1253 } 1254 } 1255 1256 device++; 1257 num_of_slots--; 1258 } 1259 1260 if (!power_mode) { 1261 set_SOGO(ctrl); 1262 // Wait for SOBS to be unset 1263 wait_for_ctrl_irq(ctrl); 1264 } 1265 1266 rc = init_SERR(ctrl); 1267 if (rc) { 1268 err("init_SERR failed\n"); 1269 mutex_unlock(&ctrl->crit_sect); 1270 goto err_free_irq; 1271 } 1272 1273 // Done with exclusive hardware access 1274 mutex_unlock(&ctrl->crit_sect); 1275 1276 cpqhp_create_debugfs_files(ctrl); 1277 1278 return 0; 1279 1280 err_free_irq: 1281 free_irq(ctrl->interrupt, ctrl); 1282 err_iounmap: 1283 iounmap(ctrl->hpc_reg); 1284 err_free_mem_region: 1285 release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 1286 err_free_bus: 1287 kfree(ctrl->pci_bus); 1288 err_free_ctrl: 1289 kfree(ctrl); 1290 err_disable_device: 1291 pci_disable_device(pdev); 1292 return rc; 1293 } 1294 1295 1296 static int one_time_init(void) 1297 { 1298 int loop; 1299 int retval = 0; 1300 1301 if (initialized) 1302 return 0; 1303 1304 power_mode = 0; 1305 1306 retval = pci_print_IRQ_route(); 1307 if (retval) 1308 goto error; 1309 1310 dbg("Initialize + Start the notification mechanism \n"); 1311 1312 retval = cpqhp_event_start_thread(); 1313 if (retval) 1314 goto error; 1315 1316 dbg("Initialize slot lists\n"); 1317 for (loop = 0; loop < 256; loop++) { 1318 cpqhp_slot_list[loop] = NULL; 1319 } 1320 1321 // FIXME: We also need to hook the NMI handler eventually. 1322 // this also needs to be worked with Christoph 1323 // register_NMI_handler(); 1324 1325 // Map rom address 1326 cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); 1327 if (!cpqhp_rom_start) { 1328 err ("Could not ioremap memory region for ROM\n"); 1329 retval = -EIO; 1330 goto error; 1331 } 1332 1333 /* Now, map the int15 entry point if we are on compaq specific hardware */ 1334 compaq_nvram_init(cpqhp_rom_start); 1335 1336 /* Map smbios table entry point structure */ 1337 smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, 1338 cpqhp_rom_start + ROM_PHY_LEN); 1339 if (!smbios_table) { 1340 err ("Could not find the SMBIOS pointer in memory\n"); 1341 retval = -EIO; 1342 goto error_rom_start; 1343 } 1344 1345 smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), 1346 readw(smbios_table + ST_LENGTH)); 1347 if (!smbios_start) { 1348 err ("Could not ioremap memory region taken from SMBIOS values\n"); 1349 retval = -EIO; 1350 goto error_smbios_start; 1351 } 1352 1353 initialized = 1; 1354 1355 return retval; 1356 1357 error_smbios_start: 1358 iounmap(smbios_start); 1359 error_rom_start: 1360 iounmap(cpqhp_rom_start); 1361 error: 1362 return retval; 1363 } 1364 1365 1366 static void __exit unload_cpqphpd(void) 1367 { 1368 struct pci_func *next; 1369 struct pci_func *TempSlot; 1370 int loop; 1371 u32 rc; 1372 struct controller *ctrl; 1373 struct controller *tctrl; 1374 struct pci_resource *res; 1375 struct pci_resource *tres; 1376 1377 rc = compaq_nvram_store(cpqhp_rom_start); 1378 1379 ctrl = cpqhp_ctrl_list; 1380 1381 while (ctrl) { 1382 if (ctrl->hpc_reg) { 1383 u16 misc; 1384 rc = read_slot_enable (ctrl); 1385 1386 writeb(0, ctrl->hpc_reg + SLOT_SERR); 1387 writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); 1388 1389 misc = readw(ctrl->hpc_reg + MISC); 1390 misc &= 0xFFFD; 1391 writew(misc, ctrl->hpc_reg + MISC); 1392 } 1393 1394 ctrl_slot_cleanup(ctrl); 1395 1396 res = ctrl->io_head; 1397 while (res) { 1398 tres = res; 1399 res = res->next; 1400 kfree(tres); 1401 } 1402 1403 res = ctrl->mem_head; 1404 while (res) { 1405 tres = res; 1406 res = res->next; 1407 kfree(tres); 1408 } 1409 1410 res = ctrl->p_mem_head; 1411 while (res) { 1412 tres = res; 1413 res = res->next; 1414 kfree(tres); 1415 } 1416 1417 res = ctrl->bus_head; 1418 while (res) { 1419 tres = res; 1420 res = res->next; 1421 kfree(tres); 1422 } 1423 1424 kfree (ctrl->pci_bus); 1425 1426 tctrl = ctrl; 1427 ctrl = ctrl->next; 1428 kfree(tctrl); 1429 } 1430 1431 for (loop = 0; loop < 256; loop++) { 1432 next = cpqhp_slot_list[loop]; 1433 while (next != NULL) { 1434 res = next->io_head; 1435 while (res) { 1436 tres = res; 1437 res = res->next; 1438 kfree(tres); 1439 } 1440 1441 res = next->mem_head; 1442 while (res) { 1443 tres = res; 1444 res = res->next; 1445 kfree(tres); 1446 } 1447 1448 res = next->p_mem_head; 1449 while (res) { 1450 tres = res; 1451 res = res->next; 1452 kfree(tres); 1453 } 1454 1455 res = next->bus_head; 1456 while (res) { 1457 tres = res; 1458 res = res->next; 1459 kfree(tres); 1460 } 1461 1462 TempSlot = next; 1463 next = next->next; 1464 kfree(TempSlot); 1465 } 1466 } 1467 1468 // Stop the notification mechanism 1469 if (initialized) 1470 cpqhp_event_stop_thread(); 1471 1472 //unmap the rom address 1473 if (cpqhp_rom_start) 1474 iounmap(cpqhp_rom_start); 1475 if (smbios_start) 1476 iounmap(smbios_start); 1477 } 1478 1479 1480 1481 static struct pci_device_id hpcd_pci_tbl[] = { 1482 { 1483 /* handle any PCI Hotplug controller */ 1484 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1485 .class_mask = ~0, 1486 1487 /* no matter who makes it */ 1488 .vendor = PCI_ANY_ID, 1489 .device = PCI_ANY_ID, 1490 .subvendor = PCI_ANY_ID, 1491 .subdevice = PCI_ANY_ID, 1492 1493 }, { /* end: all zeroes */ } 1494 }; 1495 1496 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); 1497 1498 1499 1500 static struct pci_driver cpqhpc_driver = { 1501 .name = "compaq_pci_hotplug", 1502 .id_table = hpcd_pci_tbl, 1503 .probe = cpqhpc_probe, 1504 /* remove: cpqhpc_remove_one, */ 1505 }; 1506 1507 1508 1509 static int __init cpqhpc_init(void) 1510 { 1511 int result; 1512 1513 cpqhp_debug = debug; 1514 1515 info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); 1516 cpqhp_initialize_debugfs(); 1517 result = pci_register_driver(&cpqhpc_driver); 1518 dbg("pci_register_driver = %d\n", result); 1519 return result; 1520 } 1521 1522 1523 static void __exit cpqhpc_cleanup(void) 1524 { 1525 dbg("unload_cpqphpd()\n"); 1526 unload_cpqphpd(); 1527 1528 dbg("pci_unregister_driver\n"); 1529 pci_unregister_driver(&cpqhpc_driver); 1530 cpqhp_shutdown_debugfs(); 1531 } 1532 1533 1534 module_init(cpqhpc_init); 1535 module_exit(cpqhpc_cleanup); 1536 1537 1538