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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / pci / hotplug / cpqphp_core.c
blob74178875b9494920801c3a378a8b5bb344c5d0e4
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", __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 *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", __FUNCTION__);
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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__);
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 __FUNCTION__, 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 __FUNCTION__, 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
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