1 /* 2 * Compaq Hot Plug Controller Driver 3 * 4 * Copyright (C) 1995,2001 Compaq Computer Corporation 5 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com> 6 * Copyright (C) 2001 IBM Corp. 7 * 8 * All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or (at 13 * your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 18 * NON INFRINGEMENT. See the GNU General Public License for more 19 * details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Send feedback to <greg@kroah.com> 26 * 27 * Jan 12, 2003 - Added 66/100/133MHz PCI-X support, 28 * Torben Mathiasen <torben.mathiasen@hp.com> 29 * 30 */ 31 32 #include <linux/config.h> 33 #include <linux/module.h> 34 #include <linux/moduleparam.h> 35 #include <linux/kernel.h> 36 #include <linux/types.h> 37 #include <linux/proc_fs.h> 38 #include <linux/slab.h> 39 #include <linux/workqueue.h> 40 #include <linux/pci.h> 41 #include <linux/init.h> 42 #include <linux/interrupt.h> 43 44 #include <asm/uaccess.h> 45 46 #include "cpqphp.h" 47 #include "cpqphp_nvram.h" 48 #include "../../../arch/i386/pci/pci.h" /* horrible hack showing how processor dependent we are... */ 49 50 51 /* Global variables */ 52 int cpqhp_debug; 53 int cpqhp_legacy_mode; 54 struct controller *cpqhp_ctrl_list; /* = NULL */ 55 struct pci_func *cpqhp_slot_list[256]; 56 57 /* local variables */ 58 static void __iomem *smbios_table; 59 static void __iomem *smbios_start; 60 static void __iomem *cpqhp_rom_start; 61 static int power_mode; 62 static int debug; 63 static int initialized; 64 65 #define DRIVER_VERSION "0.9.8" 66 #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>" 67 #define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver" 68 69 MODULE_AUTHOR(DRIVER_AUTHOR); 70 MODULE_DESCRIPTION(DRIVER_DESC); 71 MODULE_LICENSE("GPL"); 72 73 module_param(power_mode, bool, 0644); 74 MODULE_PARM_DESC(power_mode, "Power mode enabled or not"); 75 76 module_param(debug, bool, 0644); 77 MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); 78 79 #define CPQHPC_MODULE_MINOR 208 80 81 static int one_time_init (void); 82 static int set_attention_status (struct hotplug_slot *slot, u8 value); 83 static int process_SI (struct hotplug_slot *slot); 84 static int process_SS (struct hotplug_slot *slot); 85 static int hardware_test (struct hotplug_slot *slot, u32 value); 86 static int get_power_status (struct hotplug_slot *slot, u8 *value); 87 static int get_attention_status (struct hotplug_slot *slot, u8 *value); 88 static int get_latch_status (struct hotplug_slot *slot, u8 *value); 89 static int get_adapter_status (struct hotplug_slot *slot, u8 *value); 90 static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 91 static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); 92 93 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { 94 .owner = THIS_MODULE, 95 .set_attention_status = set_attention_status, 96 .enable_slot = process_SI, 97 .disable_slot = process_SS, 98 .hardware_test = hardware_test, 99 .get_power_status = get_power_status, 100 .get_attention_status = get_attention_status, 101 .get_latch_status = get_latch_status, 102 .get_adapter_status = get_adapter_status, 103 .get_max_bus_speed = get_max_bus_speed, 104 .get_cur_bus_speed = get_cur_bus_speed, 105 }; 106 107 108 static inline int is_slot64bit(struct slot *slot) 109 { 110 return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; 111 } 112 113 static inline int is_slot66mhz(struct slot *slot) 114 { 115 return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; 116 } 117 118 /** 119 * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. 120 * 121 * @begin: begin pointer for region to be scanned. 122 * @end: end pointer for region to be scanned. 123 * 124 * Returns pointer to the head of the SMBIOS tables (or NULL) 125 * 126 */ 127 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) 128 { 129 void __iomem *fp; 130 void __iomem *endp; 131 u8 temp1, temp2, temp3, temp4; 132 int status = 0; 133 134 endp = (end - sizeof(u32) + 1); 135 136 for (fp = begin; fp <= endp; fp += 16) { 137 temp1 = readb(fp); 138 temp2 = readb(fp+1); 139 temp3 = readb(fp+2); 140 temp4 = readb(fp+3); 141 if (temp1 == '_' && 142 temp2 == 'S' && 143 temp3 == 'M' && 144 temp4 == '_') { 145 status = 1; 146 break; 147 } 148 } 149 150 if (!status) 151 fp = NULL; 152 153 dbg("Discovered SMBIOS Entry point at %p\n", fp); 154 155 return fp; 156 } 157 158 /** 159 * init_SERR - Initializes the per slot SERR generation. 160 * 161 * For unexpected switch opens 162 * 163 */ 164 static int init_SERR(struct controller * ctrl) 165 { 166 u32 tempdword; 167 u32 number_of_slots; 168 u8 physical_slot; 169 170 if (!ctrl) 171 return 1; 172 173 tempdword = ctrl->first_slot; 174 175 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 176 // Loop through slots 177 while (number_of_slots) { 178 physical_slot = tempdword; 179 writeb(0, ctrl->hpc_reg + SLOT_SERR); 180 tempdword++; 181 number_of_slots--; 182 } 183 184 return 0; 185 } 186 187 188 /* nice debugging output */ 189 static int pci_print_IRQ_route (void) 190 { 191 struct irq_routing_table *routing_table; 192 int len; 193 int loop; 194 195 u8 tbus, tdevice, tslot; 196 197 routing_table = pcibios_get_irq_routing_table(); 198 if (routing_table == NULL) { 199 err("No BIOS Routing Table??? Not good\n"); 200 return -ENOMEM; 201 } 202 203 len = (routing_table->size - sizeof(struct irq_routing_table)) / 204 sizeof(struct irq_info); 205 // Make sure I got at least one entry 206 if (len == 0) { 207 kfree(routing_table); 208 return -1; 209 } 210 211 dbg("bus dev func slot\n"); 212 213 for (loop = 0; loop < len; ++loop) { 214 tbus = routing_table->slots[loop].bus; 215 tdevice = routing_table->slots[loop].devfn; 216 tslot = routing_table->slots[loop].slot; 217 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); 218 219 } 220 kfree(routing_table); 221 return 0; 222 } 223 224 225 /** 226 * get_subsequent_smbios_entry: get the next entry from bios table. 227 * 228 * Gets the first entry if previous == NULL 229 * Otherwise, returns the next entry 230 * Uses global SMBIOS Table pointer 231 * 232 * @curr: %NULL or pointer to previously returned structure 233 * 234 * returns a pointer to an SMBIOS structure or NULL if none found 235 */ 236 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, 237 void __iomem *smbios_table, 238 void __iomem *curr) 239 { 240 u8 bail = 0; 241 u8 previous_byte = 1; 242 void __iomem *p_temp; 243 void __iomem *p_max; 244 245 if (!smbios_table || !curr) 246 return(NULL); 247 248 // set p_max to the end of the table 249 p_max = smbios_start + readw(smbios_table + ST_LENGTH); 250 251 p_temp = curr; 252 p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); 253 254 while ((p_temp < p_max) && !bail) { 255 /* Look for the double NULL terminator 256 * The first condition is the previous byte 257 * and the second is the curr */ 258 if (!previous_byte && !(readb(p_temp))) { 259 bail = 1; 260 } 261 262 previous_byte = readb(p_temp); 263 p_temp++; 264 } 265 266 if (p_temp < p_max) { 267 return p_temp; 268 } else { 269 return NULL; 270 } 271 } 272 273 274 /** 275 * get_SMBIOS_entry 276 * 277 * @type:SMBIOS structure type to be returned 278 * @previous: %NULL or pointer to previously returned structure 279 * 280 * Gets the first entry of the specified type if previous == NULL 281 * Otherwise, returns the next entry of the given type. 282 * Uses global SMBIOS Table pointer 283 * Uses get_subsequent_smbios_entry 284 * 285 * returns a pointer to an SMBIOS structure or %NULL if none found 286 */ 287 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, 288 void __iomem *smbios_table, 289 u8 type, 290 void __iomem *previous) 291 { 292 if (!smbios_table) 293 return NULL; 294 295 if (!previous) { 296 previous = smbios_start; 297 } else { 298 previous = get_subsequent_smbios_entry(smbios_start, 299 smbios_table, previous); 300 } 301 302 while (previous) { 303 if (readb(previous + SMBIOS_GENERIC_TYPE) != type) { 304 previous = get_subsequent_smbios_entry(smbios_start, 305 smbios_table, previous); 306 } else { 307 break; 308 } 309 } 310 311 return previous; 312 } 313 314 static void release_slot(struct hotplug_slot *hotplug_slot) 315 { 316 struct slot *slot = hotplug_slot->private; 317 318 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 319 320 kfree(slot->hotplug_slot->info); 321 kfree(slot->hotplug_slot->name); 322 kfree(slot->hotplug_slot); 323 kfree(slot); 324 } 325 326 static int ctrl_slot_setup(struct controller *ctrl, 327 void __iomem *smbios_start, 328 void __iomem *smbios_table) 329 { 330 struct slot *new_slot; 331 u8 number_of_slots; 332 u8 slot_device; 333 u8 slot_number; 334 u8 ctrl_slot; 335 u32 tempdword; 336 void __iomem *slot_entry= NULL; 337 int result = -ENOMEM; 338 339 dbg("%s\n", __FUNCTION__); 340 341 tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 342 343 number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 344 slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 345 slot_number = ctrl->first_slot; 346 347 while (number_of_slots) { 348 new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL); 349 if (!new_slot) 350 goto error; 351 352 memset(new_slot, 0, sizeof(struct slot)); 353 new_slot->hotplug_slot = kmalloc(sizeof(*(new_slot->hotplug_slot)), 354 GFP_KERNEL); 355 if (!new_slot->hotplug_slot) 356 goto error_slot; 357 memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot)); 358 359 new_slot->hotplug_slot->info = 360 kmalloc(sizeof(*(new_slot->hotplug_slot->info)), 361 GFP_KERNEL); 362 if (!new_slot->hotplug_slot->info) 363 goto error_hpslot; 364 memset(new_slot->hotplug_slot->info, 0, 365 sizeof(struct hotplug_slot_info)); 366 new_slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); 367 if (!new_slot->hotplug_slot->name) 368 goto error_info; 369 370 new_slot->ctrl = ctrl; 371 new_slot->bus = ctrl->bus; 372 new_slot->device = slot_device; 373 new_slot->number = slot_number; 374 dbg("slot->number = %d\n",new_slot->number); 375 376 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, 377 slot_entry); 378 379 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != new_slot->number)) { 380 slot_entry = get_SMBIOS_entry(smbios_start, 381 smbios_table, 9, slot_entry); 382 } 383 384 new_slot->p_sm_slot = slot_entry; 385 386 init_timer(&new_slot->task_event); 387 new_slot->task_event.expires = jiffies + 5 * HZ; 388 new_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 new_slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; 393 new_slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; 394 395 if (is_slot64bit(new_slot)) 396 new_slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; 397 if (is_slot66mhz(new_slot)) 398 new_slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; 399 if (ctrl->speed == PCI_SPEED_66MHz) 400 new_slot->capabilities |= PCISLOT_66_MHZ_OPERATION; 401 402 ctrl_slot = slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); 403 404 // Check presence 405 new_slot->capabilities |= ((((~tempdword) >> 23) | ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; 406 // Check the switch state 407 new_slot->capabilities |= ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; 408 // Check the slot enable 409 new_slot->capabilities |= ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; 410 411 /* register this slot with the hotplug pci core */ 412 new_slot->hotplug_slot->release = &release_slot; 413 new_slot->hotplug_slot->private = new_slot; 414 make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot); 415 new_slot->hotplug_slot->ops = &cpqphp_hotplug_slot_ops; 416 417 new_slot->hotplug_slot->info->power_status = get_slot_enabled(ctrl, new_slot); 418 new_slot->hotplug_slot->info->attention_status = cpq_get_attention_status(ctrl, new_slot); 419 new_slot->hotplug_slot->info->latch_status = cpq_get_latch_status(ctrl, new_slot); 420 new_slot->hotplug_slot->info->adapter_status = get_presence_status(ctrl, new_slot); 421 422 dbg ("registering bus %d, dev %d, number %d, " 423 "ctrl->slot_device_offset %d, slot %d\n", 424 new_slot->bus, new_slot->device, 425 new_slot->number, ctrl->slot_device_offset, 426 slot_number); 427 result = pci_hp_register (new_slot->hotplug_slot); 428 if (result) { 429 err ("pci_hp_register failed with error %d\n", result); 430 goto error_name; 431 } 432 433 new_slot->next = ctrl->slot; 434 ctrl->slot = new_slot; 435 436 number_of_slots--; 437 slot_device++; 438 slot_number++; 439 } 440 441 return 0; 442 443 error_name: 444 kfree(new_slot->hotplug_slot->name); 445 error_info: 446 kfree(new_slot->hotplug_slot->info); 447 error_hpslot: 448 kfree(new_slot->hotplug_slot); 449 error_slot: 450 kfree(new_slot); 451 error: 452 return result; 453 } 454 455 static int ctrl_slot_cleanup (struct controller * ctrl) 456 { 457 struct slot *old_slot, *next_slot; 458 459 old_slot = ctrl->slot; 460 ctrl->slot = NULL; 461 462 while (old_slot) { 463 /* memory will be freed by the release_slot callback */ 464 next_slot = old_slot->next; 465 pci_hp_deregister (old_slot->hotplug_slot); 466 old_slot = next_slot; 467 } 468 469 //Free IRQ associated with hot plug device 470 free_irq(ctrl->interrupt, ctrl); 471 //Unmap the memory 472 iounmap(ctrl->hpc_reg); 473 //Finally reclaim PCI mem 474 release_mem_region(pci_resource_start(ctrl->pci_dev, 0), 475 pci_resource_len(ctrl->pci_dev, 0)); 476 477 return(0); 478 } 479 480 481 //============================================================================ 482 // function: get_slot_mapping 483 // 484 // Description: Attempts to determine a logical slot mapping for a PCI 485 // device. Won't work for more than one PCI-PCI bridge 486 // in a slot. 487 // 488 // Input: u8 bus_num - bus number of PCI device 489 // u8 dev_num - device number of PCI device 490 // u8 *slot - Pointer to u8 where slot number will 491 // be returned 492 // 493 // Output: SUCCESS or FAILURE 494 //============================================================================= 495 static int 496 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) 497 { 498 struct irq_routing_table *PCIIRQRoutingInfoLength; 499 u32 work; 500 long len; 501 long loop; 502 503 u8 tbus, tdevice, tslot, bridgeSlot; 504 505 dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot); 506 507 bridgeSlot = 0xFF; 508 509 PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); 510 if (!PCIIRQRoutingInfoLength) 511 return -1; 512 513 len = (PCIIRQRoutingInfoLength->size - 514 sizeof(struct irq_routing_table)) / sizeof(struct irq_info); 515 // Make sure I got at least one entry 516 if (len == 0) { 517 kfree(PCIIRQRoutingInfoLength); 518 return -1; 519 } 520 521 for (loop = 0; loop < len; ++loop) { 522 tbus = PCIIRQRoutingInfoLength->slots[loop].bus; 523 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; 524 tslot = PCIIRQRoutingInfoLength->slots[loop].slot; 525 526 if ((tbus == bus_num) && (tdevice == dev_num)) { 527 *slot = tslot; 528 kfree(PCIIRQRoutingInfoLength); 529 return 0; 530 } else { 531 /* Did not get a match on the target PCI device. Check 532 * if the current IRQ table entry is a PCI-to-PCI bridge 533 * device. If so, and it's secondary bus matches the 534 * bus number for the target device, I need to save the 535 * bridge's slot number. If I can not find an entry for 536 * the target device, I will have to assume it's on the 537 * other side of the bridge, and assign it the bridge's 538 * slot. */ 539 bus->number = tbus; 540 pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), 541 PCI_REVISION_ID, &work); 542 543 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { 544 pci_bus_read_config_dword(bus, 545 PCI_DEVFN(tdevice, 0), 546 PCI_PRIMARY_BUS, &work); 547 // See if bridge's secondary bus matches target bus. 548 if (((work >> 8) & 0x000000FF) == (long) bus_num) { 549 bridgeSlot = tslot; 550 } 551 } 552 } 553 554 } 555 556 // If we got here, we didn't find an entry in the IRQ mapping table 557 // for the target PCI device. If we did determine that the target 558 // device is on the other side of a PCI-to-PCI bridge, return the 559 // slot number for the bridge. 560 if (bridgeSlot != 0xFF) { 561 *slot = bridgeSlot; 562 kfree(PCIIRQRoutingInfoLength); 563 return 0; 564 } 565 kfree(PCIIRQRoutingInfoLength); 566 // Couldn't find an entry in the routing table for this PCI device 567 return -1; 568 } 569 570 571 /** 572 * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off 573 * 574 */ 575 static int 576 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, 577 u32 status) 578 { 579 u8 hp_slot; 580 581 if (func == NULL) 582 return(1); 583 584 hp_slot = func->device - ctrl->slot_device_offset; 585 586 // Wait for exclusive access to hardware 587 down(&ctrl->crit_sect); 588 589 if (status == 1) { 590 amber_LED_on (ctrl, hp_slot); 591 } else if (status == 0) { 592 amber_LED_off (ctrl, hp_slot); 593 } else { 594 // Done with exclusive hardware access 595 up(&ctrl->crit_sect); 596 return(1); 597 } 598 599 set_SOGO(ctrl); 600 601 // Wait for SOBS to be unset 602 wait_for_ctrl_irq (ctrl); 603 604 // Done with exclusive hardware access 605 up(&ctrl->crit_sect); 606 607 return(0); 608 } 609 610 611 /** 612 * set_attention_status - Turns the Amber LED for a slot on or off 613 * 614 */ 615 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) 616 { 617 struct pci_func *slot_func; 618 struct slot *slot = hotplug_slot->private; 619 struct controller *ctrl = slot->ctrl; 620 u8 bus; 621 u8 devfn; 622 u8 device; 623 u8 function; 624 625 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 626 627 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 628 return -ENODEV; 629 630 device = devfn >> 3; 631 function = devfn & 0x7; 632 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 633 634 slot_func = cpqhp_slot_find(bus, device, function); 635 if (!slot_func) 636 return -ENODEV; 637 638 return cpqhp_set_attention_status(ctrl, slot_func, status); 639 } 640 641 642 static int process_SI(struct hotplug_slot *hotplug_slot) 643 { 644 struct pci_func *slot_func; 645 struct slot *slot = hotplug_slot->private; 646 struct controller *ctrl = slot->ctrl; 647 u8 bus; 648 u8 devfn; 649 u8 device; 650 u8 function; 651 652 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 653 654 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 655 return -ENODEV; 656 657 device = devfn >> 3; 658 function = devfn & 0x7; 659 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 660 661 slot_func = cpqhp_slot_find(bus, device, function); 662 if (!slot_func) 663 return -ENODEV; 664 665 slot_func->bus = bus; 666 slot_func->device = device; 667 slot_func->function = function; 668 slot_func->configured = 0; 669 dbg("board_added(%p, %p)\n", slot_func, ctrl); 670 return cpqhp_process_SI(ctrl, slot_func); 671 } 672 673 674 static int process_SS(struct hotplug_slot *hotplug_slot) 675 { 676 struct pci_func *slot_func; 677 struct slot *slot = hotplug_slot->private; 678 struct controller *ctrl = slot->ctrl; 679 u8 bus; 680 u8 devfn; 681 u8 device; 682 u8 function; 683 684 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 685 686 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) 687 return -ENODEV; 688 689 device = devfn >> 3; 690 function = devfn & 0x7; 691 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); 692 693 slot_func = cpqhp_slot_find(bus, device, function); 694 if (!slot_func) 695 return -ENODEV; 696 697 dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl); 698 return cpqhp_process_SS(ctrl, slot_func); 699 } 700 701 702 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) 703 { 704 struct slot *slot = hotplug_slot->private; 705 struct controller *ctrl = slot->ctrl; 706 707 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 708 709 return cpqhp_hardware_test(ctrl, value); 710 } 711 712 713 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) 714 { 715 struct slot *slot = hotplug_slot->private; 716 struct controller *ctrl = slot->ctrl; 717 718 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 719 720 *value = get_slot_enabled(ctrl, slot); 721 return 0; 722 } 723 724 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) 725 { 726 struct slot *slot = hotplug_slot->private; 727 struct controller *ctrl = slot->ctrl; 728 729 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 730 731 *value = cpq_get_attention_status(ctrl, slot); 732 return 0; 733 } 734 735 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) 736 { 737 struct slot *slot = hotplug_slot->private; 738 struct controller *ctrl = slot->ctrl; 739 740 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 741 742 *value = cpq_get_latch_status(ctrl, slot); 743 744 return 0; 745 } 746 747 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) 748 { 749 struct slot *slot = hotplug_slot->private; 750 struct controller *ctrl = slot->ctrl; 751 752 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 753 754 *value = get_presence_status(ctrl, slot); 755 756 return 0; 757 } 758 759 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 760 { 761 struct slot *slot = hotplug_slot->private; 762 struct controller *ctrl = slot->ctrl; 763 764 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 765 766 *value = ctrl->speed_capability; 767 768 return 0; 769 } 770 771 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) 772 { 773 struct slot *slot = hotplug_slot->private; 774 struct controller *ctrl = slot->ctrl; 775 776 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); 777 778 *value = ctrl->speed; 779 780 return 0; 781 } 782 783 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 784 { 785 u8 num_of_slots = 0; 786 u8 hp_slot = 0; 787 u8 device; 788 u8 rev; 789 u8 bus_cap; 790 u16 temp_word; 791 u16 vendor_id; 792 u16 subsystem_vid; 793 u16 subsystem_deviceid; 794 u32 rc; 795 struct controller *ctrl; 796 struct pci_func *func; 797 int err; 798 799 err = pci_enable_device(pdev); 800 if (err) { 801 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", 802 pci_name(pdev), err); 803 return err; 804 } 805 806 // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery 807 rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); 808 if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { 809 err(msg_HPC_non_compaq_or_intel); 810 rc = -ENODEV; 811 goto err_disable_device; 812 } 813 dbg("Vendor ID: %x\n", vendor_id); 814 815 rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); 816 dbg("revision: %d\n", rev); 817 if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) { 818 err(msg_HPC_rev_error); 819 rc = -ENODEV; 820 goto err_disable_device; 821 } 822 823 /* Check for the proper subsytem ID's 824 * Intel uses a different SSID programming model than Compaq. 825 * For Intel, each SSID bit identifies a PHP capability. 826 * Also Intel HPC's may have RID=0. 827 */ 828 if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { 829 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs 830 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); 831 if (rc) { 832 err("%s : pci_read_config_word failed\n", __FUNCTION__); 833 goto err_disable_device; 834 } 835 dbg("Subsystem Vendor ID: %x\n", subsystem_vid); 836 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { 837 err(msg_HPC_non_compaq_or_intel); 838 rc = -ENODEV; 839 goto err_disable_device; 840 } 841 842 ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL); 843 if (!ctrl) { 844 err("%s : out of memory\n", __FUNCTION__); 845 rc = -ENOMEM; 846 goto err_disable_device; 847 } 848 memset(ctrl, 0, sizeof(struct controller)); 849 850 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); 851 if (rc) { 852 err("%s : pci_read_config_word failed\n", __FUNCTION__); 853 goto err_free_ctrl; 854 } 855 856 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); 857 858 /* Set Vendor ID, so it can be accessed later from other functions */ 859 ctrl->vendor_id = vendor_id; 860 861 switch (subsystem_vid) { 862 case PCI_VENDOR_ID_COMPAQ: 863 if (rev >= 0x13) { /* CIOBX */ 864 ctrl->push_flag = 1; 865 ctrl->slot_switch_type = 1; 866 ctrl->push_button = 1; 867 ctrl->pci_config_space = 1; 868 ctrl->defeature_PHP = 1; 869 ctrl->pcix_support = 1; 870 ctrl->pcix_speed_capability = 1; 871 pci_read_config_byte(pdev, 0x41, &bus_cap); 872 if (bus_cap & 0x80) { 873 dbg("bus max supports 133MHz PCI-X\n"); 874 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; 875 break; 876 } 877 if (bus_cap & 0x40) { 878 dbg("bus max supports 100MHz PCI-X\n"); 879 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 880 break; 881 } 882 if (bus_cap & 20) { 883 dbg("bus max supports 66MHz PCI-X\n"); 884 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; 885 break; 886 } 887 if (bus_cap & 10) { 888 dbg("bus max supports 66MHz PCI\n"); 889 ctrl->speed_capability = PCI_SPEED_66MHz; 890 break; 891 } 892 893 break; 894 } 895 896 switch (subsystem_deviceid) { 897 case PCI_SUB_HPC_ID: 898 /* Original 6500/7000 implementation */ 899 ctrl->slot_switch_type = 1; 900 ctrl->speed_capability = PCI_SPEED_33MHz; 901 ctrl->push_button = 0; 902 ctrl->pci_config_space = 1; 903 ctrl->defeature_PHP = 1; 904 ctrl->pcix_support = 0; 905 ctrl->pcix_speed_capability = 0; 906 break; 907 case PCI_SUB_HPC_ID2: 908 /* First Pushbutton implementation */ 909 ctrl->push_flag = 1; 910 ctrl->slot_switch_type = 1; 911 ctrl->speed_capability = PCI_SPEED_33MHz; 912 ctrl->push_button = 1; 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_ID_INTC: 919 /* Third party (6500/7000) */ 920 ctrl->slot_switch_type = 1; 921 ctrl->speed_capability = PCI_SPEED_33MHz; 922 ctrl->push_button = 0; 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_ID3: 929 /* First 66 Mhz implementation */ 930 ctrl->push_flag = 1; 931 ctrl->slot_switch_type = 1; 932 ctrl->speed_capability = PCI_SPEED_66MHz; 933 ctrl->push_button = 1; 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_ID4: 940 /* First PCI-X implementation, 100MHz */ 941 ctrl->push_flag = 1; 942 ctrl->slot_switch_type = 1; 943 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; 944 ctrl->push_button = 1; 945 ctrl->pci_config_space = 1; 946 ctrl->defeature_PHP = 1; 947 ctrl->pcix_support = 1; 948 ctrl->pcix_speed_capability = 0; 949 break; 950 default: 951 err(msg_HPC_not_supported); 952 rc = -ENODEV; 953 goto err_free_ctrl; 954 } 955 break; 956 957 case PCI_VENDOR_ID_INTEL: 958 /* Check for speed capability (0=33, 1=66) */ 959 if (subsystem_deviceid & 0x0001) { 960 ctrl->speed_capability = PCI_SPEED_66MHz; 961 } else { 962 ctrl->speed_capability = PCI_SPEED_33MHz; 963 } 964 965 /* Check for push button */ 966 if (subsystem_deviceid & 0x0002) { 967 /* no push button */ 968 ctrl->push_button = 0; 969 } else { 970 /* push button supported */ 971 ctrl->push_button = 1; 972 } 973 974 /* Check for slot switch type (0=mechanical, 1=not mechanical) */ 975 if (subsystem_deviceid & 0x0004) { 976 /* no switch */ 977 ctrl->slot_switch_type = 0; 978 } else { 979 /* switch */ 980 ctrl->slot_switch_type = 1; 981 } 982 983 /* PHP Status (0=De-feature PHP, 1=Normal operation) */ 984 if (subsystem_deviceid & 0x0008) { 985 ctrl->defeature_PHP = 1; // PHP supported 986 } else { 987 ctrl->defeature_PHP = 0; // PHP not supported 988 } 989 990 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ 991 if (subsystem_deviceid & 0x0010) { 992 ctrl->alternate_base_address = 1; // supported 993 } else { 994 ctrl->alternate_base_address = 0; // not supported 995 } 996 997 /* PCI Config Space Index (0=not supported, 1=supported) */ 998 if (subsystem_deviceid & 0x0020) { 999 ctrl->pci_config_space = 1; // supported 1000 } else { 1001 ctrl->pci_config_space = 0; // not supported 1002 } 1003 1004 /* PCI-X support */ 1005 if (subsystem_deviceid & 0x0080) { 1006 /* PCI-X capable */ 1007 ctrl->pcix_support = 1; 1008 /* Frequency of operation in PCI-X mode */ 1009 if (subsystem_deviceid & 0x0040) { 1010 /* 133MHz PCI-X if bit 7 is 1 */ 1011 ctrl->pcix_speed_capability = 1; 1012 } else { 1013 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ 1014 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ 1015 ctrl->pcix_speed_capability = 0; 1016 } 1017 } else { 1018 /* Conventional PCI */ 1019 ctrl->pcix_support = 0; 1020 ctrl->pcix_speed_capability = 0; 1021 } 1022 break; 1023 1024 default: 1025 err(msg_HPC_not_supported); 1026 rc = -ENODEV; 1027 goto err_free_ctrl; 1028 } 1029 1030 } else { 1031 err(msg_HPC_not_supported); 1032 return -ENODEV; 1033 } 1034 1035 // Tell the user that we found one. 1036 info("Initializing the PCI hot plug controller residing on PCI bus %d\n", 1037 pdev->bus->number); 1038 1039 dbg("Hotplug controller capabilities:\n"); 1040 dbg(" speed_capability %d\n", ctrl->speed_capability); 1041 dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? 1042 "switch present" : "no switch"); 1043 dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? 1044 "PHP supported" : "PHP not supported"); 1045 dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? 1046 "supported" : "not supported"); 1047 dbg(" pci_config_space %s\n", ctrl->pci_config_space ? 1048 "supported" : "not supported"); 1049 dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? 1050 "supported" : "not supported"); 1051 dbg(" pcix_support %s\n", ctrl->pcix_support ? 1052 "supported" : "not supported"); 1053 1054 ctrl->pci_dev = pdev; 1055 pci_set_drvdata(pdev, ctrl); 1056 1057 /* make our own copy of the pci bus structure, 1058 * as we like tweaking it a lot */ 1059 ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); 1060 if (!ctrl->pci_bus) { 1061 err("out of memory\n"); 1062 rc = -ENOMEM; 1063 goto err_free_ctrl; 1064 } 1065 memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); 1066 1067 ctrl->bus = pdev->bus->number; 1068 ctrl->rev = rev; 1069 dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, 1070 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); 1071 1072 init_MUTEX(&ctrl->crit_sect); 1073 init_waitqueue_head(&ctrl->queue); 1074 1075 /* initialize our threads if they haven't already been started up */ 1076 rc = one_time_init(); 1077 if (rc) { 1078 goto err_free_bus; 1079 } 1080 1081 dbg("pdev = %p\n", pdev); 1082 dbg("pci resource start %lx\n", pci_resource_start(pdev, 0)); 1083 dbg("pci resource len %lx\n", pci_resource_len(pdev, 0)); 1084 1085 if (!request_mem_region(pci_resource_start(pdev, 0), 1086 pci_resource_len(pdev, 0), MY_NAME)) { 1087 err("cannot reserve MMIO region\n"); 1088 rc = -ENOMEM; 1089 goto err_free_bus; 1090 } 1091 1092 ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), 1093 pci_resource_len(pdev, 0)); 1094 if (!ctrl->hpc_reg) { 1095 err("cannot remap MMIO region %lx @ %lx\n", 1096 pci_resource_len(pdev, 0), 1097 pci_resource_start(pdev, 0)); 1098 rc = -ENODEV; 1099 goto err_free_mem_region; 1100 } 1101 1102 // Check for 66Mhz operation 1103 ctrl->speed = get_controller_speed(ctrl); 1104 1105 1106 /******************************************************** 1107 * 1108 * Save configuration headers for this and 1109 * subordinate PCI buses 1110 * 1111 ********************************************************/ 1112 1113 // find the physical slot number of the first hot plug slot 1114 1115 /* Get slot won't work for devices behind bridges, but 1116 * in this case it will always be called for the "base" 1117 * bus/dev/func of a slot. 1118 * CS: this is leveraging the PCIIRQ routing code from the kernel 1119 * (pci-pc.c: get_irq_routing_table) */ 1120 rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, 1121 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), 1122 &(ctrl->first_slot)); 1123 dbg("get_slot_mapping: first_slot = %d, returned = %d\n", 1124 ctrl->first_slot, rc); 1125 if (rc) { 1126 err(msg_initialization_err, rc); 1127 goto err_iounmap; 1128 } 1129 1130 // Store PCI Config Space for all devices on this bus 1131 rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); 1132 if (rc) { 1133 err("%s: unable to save PCI configuration data, error %d\n", 1134 __FUNCTION__, rc); 1135 goto err_iounmap; 1136 } 1137 1138 /* 1139 * Get IO, memory, and IRQ resources for new devices 1140 */ 1141 // The next line is required for cpqhp_find_available_resources 1142 ctrl->interrupt = pdev->irq; 1143 if (ctrl->interrupt < 0x10) { 1144 cpqhp_legacy_mode = 1; 1145 dbg("System seems to be configured for Full Table Mapped MPS mode\n"); 1146 } 1147 1148 ctrl->cfgspc_irq = 0; 1149 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); 1150 1151 rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); 1152 ctrl->add_support = !rc; 1153 if (rc) { 1154 dbg("cpqhp_find_available_resources = 0x%x\n", rc); 1155 err("unable to locate PCI configuration resources for hot plug add.\n"); 1156 goto err_iounmap; 1157 } 1158 1159 /* 1160 * Finish setting up the hot plug ctrl device 1161 */ 1162 ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1163 dbg("NumSlots %d \n", ctrl->slot_device_offset); 1164 1165 ctrl->next_event = 0; 1166 1167 /* Setup the slot information structures */ 1168 rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); 1169 if (rc) { 1170 err(msg_initialization_err, 6); 1171 err("%s: unable to save PCI configuration data, error %d\n", 1172 __FUNCTION__, rc); 1173 goto err_iounmap; 1174 } 1175 1176 /* Mask all general input interrupts */ 1177 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); 1178 1179 /* set up the interrupt */ 1180 dbg("HPC interrupt = %d \n", ctrl->interrupt); 1181 if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, 1182 SA_SHIRQ, MY_NAME, ctrl)) { 1183 err("Can't get irq %d for the hotplug pci controller\n", 1184 ctrl->interrupt); 1185 rc = -ENODEV; 1186 goto err_iounmap; 1187 } 1188 1189 /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ 1190 temp_word = readw(ctrl->hpc_reg + MISC); 1191 temp_word |= 0x4006; 1192 writew(temp_word, ctrl->hpc_reg + MISC); 1193 1194 // Changed 05/05/97 to clear all interrupts at start 1195 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); 1196 1197 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); 1198 1199 writel(0x0L, ctrl->hpc_reg + INT_MASK); 1200 1201 if (!cpqhp_ctrl_list) { 1202 cpqhp_ctrl_list = ctrl; 1203 ctrl->next = NULL; 1204 } else { 1205 ctrl->next = cpqhp_ctrl_list; 1206 cpqhp_ctrl_list = ctrl; 1207 } 1208 1209 // turn off empty slots here unless command line option "ON" set 1210 // Wait for exclusive access to hardware 1211 down(&ctrl->crit_sect); 1212 1213 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; 1214 1215 // find first device number for the ctrl 1216 device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; 1217 1218 while (num_of_slots) { 1219 dbg("num_of_slots: %d\n", num_of_slots); 1220 func = cpqhp_slot_find(ctrl->bus, device, 0); 1221 if (!func) 1222 break; 1223 1224 hp_slot = func->device - ctrl->slot_device_offset; 1225 dbg("hp_slot: %d\n", hp_slot); 1226 1227 // We have to save the presence info for these slots 1228 temp_word = ctrl->ctrl_int_comp >> 16; 1229 func->presence_save = (temp_word >> hp_slot) & 0x01; 1230 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; 1231 1232 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { 1233 func->switch_save = 0; 1234 } else { 1235 func->switch_save = 0x10; 1236 } 1237 1238 if (!power_mode) { 1239 if (!func->is_a_board) { 1240 green_LED_off(ctrl, hp_slot); 1241 slot_disable(ctrl, hp_slot); 1242 } 1243 } 1244 1245 device++; 1246 num_of_slots--; 1247 } 1248 1249 if (!power_mode) { 1250 set_SOGO(ctrl); 1251 // Wait for SOBS to be unset 1252 wait_for_ctrl_irq(ctrl); 1253 } 1254 1255 rc = init_SERR(ctrl); 1256 if (rc) { 1257 err("init_SERR failed\n"); 1258 up(&ctrl->crit_sect); 1259 goto err_free_irq; 1260 } 1261 1262 // Done with exclusive hardware access 1263 up(&ctrl->crit_sect); 1264 1265 cpqhp_create_ctrl_files(ctrl); 1266 1267 return 0; 1268 1269 err_free_irq: 1270 free_irq(ctrl->interrupt, ctrl); 1271 err_iounmap: 1272 iounmap(ctrl->hpc_reg); 1273 err_free_mem_region: 1274 release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); 1275 err_free_bus: 1276 kfree(ctrl->pci_bus); 1277 err_free_ctrl: 1278 kfree(ctrl); 1279 err_disable_device: 1280 pci_disable_device(pdev); 1281 return rc; 1282 } 1283 1284 1285 static int one_time_init(void) 1286 { 1287 int loop; 1288 int retval = 0; 1289 1290 if (initialized) 1291 return 0; 1292 1293 power_mode = 0; 1294 1295 retval = pci_print_IRQ_route(); 1296 if (retval) 1297 goto error; 1298 1299 dbg("Initialize + Start the notification mechanism \n"); 1300 1301 retval = cpqhp_event_start_thread(); 1302 if (retval) 1303 goto error; 1304 1305 dbg("Initialize slot lists\n"); 1306 for (loop = 0; loop < 256; loop++) { 1307 cpqhp_slot_list[loop] = NULL; 1308 } 1309 1310 // FIXME: We also need to hook the NMI handler eventually. 1311 // this also needs to be worked with Christoph 1312 // register_NMI_handler(); 1313 1314 // Map rom address 1315 cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); 1316 if (!cpqhp_rom_start) { 1317 err ("Could not ioremap memory region for ROM\n"); 1318 retval = -EIO; 1319 goto error; 1320 } 1321 1322 /* Now, map the int15 entry point if we are on compaq specific hardware */ 1323 compaq_nvram_init(cpqhp_rom_start); 1324 1325 /* Map smbios table entry point structure */ 1326 smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, 1327 cpqhp_rom_start + ROM_PHY_LEN); 1328 if (!smbios_table) { 1329 err ("Could not find the SMBIOS pointer in memory\n"); 1330 retval = -EIO; 1331 goto error_rom_start; 1332 } 1333 1334 smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), 1335 readw(smbios_table + ST_LENGTH)); 1336 if (!smbios_start) { 1337 err ("Could not ioremap memory region taken from SMBIOS values\n"); 1338 retval = -EIO; 1339 goto error_smbios_start; 1340 } 1341 1342 initialized = 1; 1343 1344 return retval; 1345 1346 error_smbios_start: 1347 iounmap(smbios_start); 1348 error_rom_start: 1349 iounmap(cpqhp_rom_start); 1350 error: 1351 return retval; 1352 } 1353 1354 1355 static void __exit unload_cpqphpd(void) 1356 { 1357 struct pci_func *next; 1358 struct pci_func *TempSlot; 1359 int loop; 1360 u32 rc; 1361 struct controller *ctrl; 1362 struct controller *tctrl; 1363 struct pci_resource *res; 1364 struct pci_resource *tres; 1365 1366 rc = compaq_nvram_store(cpqhp_rom_start); 1367 1368 ctrl = cpqhp_ctrl_list; 1369 1370 while (ctrl) { 1371 if (ctrl->hpc_reg) { 1372 u16 misc; 1373 rc = read_slot_enable (ctrl); 1374 1375 writeb(0, ctrl->hpc_reg + SLOT_SERR); 1376 writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); 1377 1378 misc = readw(ctrl->hpc_reg + MISC); 1379 misc &= 0xFFFD; 1380 writew(misc, ctrl->hpc_reg + MISC); 1381 } 1382 1383 ctrl_slot_cleanup(ctrl); 1384 1385 res = ctrl->io_head; 1386 while (res) { 1387 tres = res; 1388 res = res->next; 1389 kfree(tres); 1390 } 1391 1392 res = ctrl->mem_head; 1393 while (res) { 1394 tres = res; 1395 res = res->next; 1396 kfree(tres); 1397 } 1398 1399 res = ctrl->p_mem_head; 1400 while (res) { 1401 tres = res; 1402 res = res->next; 1403 kfree(tres); 1404 } 1405 1406 res = ctrl->bus_head; 1407 while (res) { 1408 tres = res; 1409 res = res->next; 1410 kfree(tres); 1411 } 1412 1413 kfree (ctrl->pci_bus); 1414 1415 tctrl = ctrl; 1416 ctrl = ctrl->next; 1417 kfree(tctrl); 1418 } 1419 1420 for (loop = 0; loop < 256; loop++) { 1421 next = cpqhp_slot_list[loop]; 1422 while (next != NULL) { 1423 res = next->io_head; 1424 while (res) { 1425 tres = res; 1426 res = res->next; 1427 kfree(tres); 1428 } 1429 1430 res = next->mem_head; 1431 while (res) { 1432 tres = res; 1433 res = res->next; 1434 kfree(tres); 1435 } 1436 1437 res = next->p_mem_head; 1438 while (res) { 1439 tres = res; 1440 res = res->next; 1441 kfree(tres); 1442 } 1443 1444 res = next->bus_head; 1445 while (res) { 1446 tres = res; 1447 res = res->next; 1448 kfree(tres); 1449 } 1450 1451 TempSlot = next; 1452 next = next->next; 1453 kfree(TempSlot); 1454 } 1455 } 1456 1457 // Stop the notification mechanism 1458 if (initialized) 1459 cpqhp_event_stop_thread(); 1460 1461 //unmap the rom address 1462 if (cpqhp_rom_start) 1463 iounmap(cpqhp_rom_start); 1464 if (smbios_start) 1465 iounmap(smbios_start); 1466 } 1467 1468 1469 1470 static struct pci_device_id hpcd_pci_tbl[] = { 1471 { 1472 /* handle any PCI Hotplug controller */ 1473 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), 1474 .class_mask = ~0, 1475 1476 /* no matter who makes it */ 1477 .vendor = PCI_ANY_ID, 1478 .device = PCI_ANY_ID, 1479 .subvendor = PCI_ANY_ID, 1480 .subdevice = PCI_ANY_ID, 1481 1482 }, { /* end: all zeroes */ } 1483 }; 1484 1485 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); 1486 1487 1488 1489 static struct pci_driver cpqhpc_driver = { 1490 .name = "compaq_pci_hotplug", 1491 .id_table = hpcd_pci_tbl, 1492 .probe = cpqhpc_probe, 1493 /* remove: cpqhpc_remove_one, */ 1494 }; 1495 1496 1497 1498 static int __init cpqhpc_init(void) 1499 { 1500 int result; 1501 1502 cpqhp_debug = debug; 1503 1504 info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); 1505 result = pci_register_driver(&cpqhpc_driver); 1506 dbg("pci_register_driver = %d\n", result); 1507 return result; 1508 } 1509 1510 1511 static void __exit cpqhpc_cleanup(void) 1512 { 1513 dbg("unload_cpqphpd()\n"); 1514 unload_cpqphpd(); 1515 1516 dbg("pci_unregister_driver\n"); 1517 pci_unregister_driver(&cpqhpc_driver); 1518 } 1519 1520 1521 module_init(cpqhpc_init); 1522 module_exit(cpqhpc_cleanup); 1523 1524 1525