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Linux 2.6.21-rc3
[linux/fpc-iii.git] / drivers / pci / hotplug / cpqphp_core.c
blob5617cfdadc5c64b19b49a08c041b28fb78c52919
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/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 *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_REVISION_ID, &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 *
585 */
586 static int
587 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
588 u32 status)
589 {
590 u8 hp_slot;
591
592 if (func == NULL)
593 return(1);
594
595 hp_slot = func->device - ctrl->slot_device_offset;
596
597 // Wait for exclusive access to hardware
598 mutex_lock(&ctrl->crit_sect);
599
600 if (status == 1) {
601 amber_LED_on (ctrl, hp_slot);
602 } else if (status == 0) {
603 amber_LED_off (ctrl, hp_slot);
604 } else {
605 // Done with exclusive hardware access
606 mutex_unlock(&ctrl->crit_sect);
607 return(1);
608 }
609
610 set_SOGO(ctrl);
611
612 // Wait for SOBS to be unset
613 wait_for_ctrl_irq (ctrl);
614
615 // Done with exclusive hardware access
616 mutex_unlock(&ctrl->crit_sect);
617
618 return(0);
619 }
620
621
622 /**
623 * set_attention_status - Turns the Amber LED for a slot on or off
624 *
625 */
626 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
627 {
628 struct pci_func *slot_func;
629 struct slot *slot = hotplug_slot->private;
630 struct controller *ctrl = slot->ctrl;
631 u8 bus;
632 u8 devfn;
633 u8 device;
634 u8 function;
635
636 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
637
638 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
639 return -ENODEV;
640
641 device = devfn >> 3;
642 function = devfn & 0x7;
643 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
644
645 slot_func = cpqhp_slot_find(bus, device, function);
646 if (!slot_func)
647 return -ENODEV;
648
649 return cpqhp_set_attention_status(ctrl, slot_func, status);
650 }
651
652
653 static int process_SI(struct hotplug_slot *hotplug_slot)
654 {
655 struct pci_func *slot_func;
656 struct slot *slot = hotplug_slot->private;
657 struct controller *ctrl = slot->ctrl;
658 u8 bus;
659 u8 devfn;
660 u8 device;
661 u8 function;
662
663 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
664
665 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
666 return -ENODEV;
667
668 device = devfn >> 3;
669 function = devfn & 0x7;
670 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
671
672 slot_func = cpqhp_slot_find(bus, device, function);
673 if (!slot_func)
674 return -ENODEV;
675
676 slot_func->bus = bus;
677 slot_func->device = device;
678 slot_func->function = function;
679 slot_func->configured = 0;
680 dbg("board_added(%p, %p)\n", slot_func, ctrl);
681 return cpqhp_process_SI(ctrl, slot_func);
682 }
683
684
685 static int process_SS(struct hotplug_slot *hotplug_slot)
686 {
687 struct pci_func *slot_func;
688 struct slot *slot = hotplug_slot->private;
689 struct controller *ctrl = slot->ctrl;
690 u8 bus;
691 u8 devfn;
692 u8 device;
693 u8 function;
694
695 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
696
697 if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
698 return -ENODEV;
699
700 device = devfn >> 3;
701 function = devfn & 0x7;
702 dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
703
704 slot_func = cpqhp_slot_find(bus, device, function);
705 if (!slot_func)
706 return -ENODEV;
707
708 dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
709 return cpqhp_process_SS(ctrl, slot_func);
710 }
711
712
713 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 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 return cpqhp_hardware_test(ctrl, value);
721 }
722
723
724 static int get_power_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 = get_slot_enabled(ctrl, slot);
732 return 0;
733 }
734
735 static int get_attention_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_attention_status(ctrl, slot);
743 return 0;
744 }
745
746 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
747 {
748 struct slot *slot = hotplug_slot->private;
749 struct controller *ctrl = slot->ctrl;
750
751 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
752
753 *value = cpq_get_latch_status(ctrl, slot);
754
755 return 0;
756 }
757
758 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
759 {
760 struct slot *slot = hotplug_slot->private;
761 struct controller *ctrl = slot->ctrl;
762
763 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
764
765 *value = get_presence_status(ctrl, slot);
766
767 return 0;
768 }
769
770 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
771 {
772 struct slot *slot = hotplug_slot->private;
773 struct controller *ctrl = slot->ctrl;
774
775 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
776
777 *value = ctrl->speed_capability;
778
779 return 0;
780 }
781
782 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
783 {
784 struct slot *slot = hotplug_slot->private;
785 struct controller *ctrl = slot->ctrl;
786
787 dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
788
789 *value = ctrl->speed;
790
791 return 0;
792 }
793
794 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
795 {
796 u8 num_of_slots = 0;
797 u8 hp_slot = 0;
798 u8 device;
799 u8 rev;
800 u8 bus_cap;
801 u16 temp_word;
802 u16 vendor_id;
803 u16 subsystem_vid;
804 u16 subsystem_deviceid;
805 u32 rc;
806 struct controller *ctrl;
807 struct pci_func *func;
808 int err;
809
810 err = pci_enable_device(pdev);
811 if (err) {
812 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
813 pci_name(pdev), err);
814 return err;
815 }
816
817 // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
818 rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
819 if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
820 err(msg_HPC_non_compaq_or_intel);
821 rc = -ENODEV;
822 goto err_disable_device;
823 }
824 dbg("Vendor ID: %x\n", vendor_id);
825
826 rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
827 dbg("revision: %d\n", rev);
828 if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) {
829 err(msg_HPC_rev_error);
830 rc = -ENODEV;
831 goto err_disable_device;
832 }
833
834 /* Check for the proper subsytem ID's
835 * Intel uses a different SSID programming model than Compaq.
836 * For Intel, each SSID bit identifies a PHP capability.
837 * Also Intel HPC's may have RID=0.
838 */
839 if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
840 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
841 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
842 if (rc) {
843 err("%s : pci_read_config_word failed\n", __FUNCTION__);
844 goto err_disable_device;
845 }
846 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
847 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
848 err(msg_HPC_non_compaq_or_intel);
849 rc = -ENODEV;
850 goto err_disable_device;
851 }
852
853 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
854 if (!ctrl) {
855 err("%s : out of memory\n", __FUNCTION__);
856 rc = -ENOMEM;
857 goto err_disable_device;
858 }
859
860 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
861 if (rc) {
862 err("%s : pci_read_config_word failed\n", __FUNCTION__);
863 goto err_free_ctrl;
864 }
865
866 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
867
868 /* Set Vendor ID, so it can be accessed later from other functions */
869 ctrl->vendor_id = vendor_id;
870
871 switch (subsystem_vid) {
872 case PCI_VENDOR_ID_COMPAQ:
873 if (rev >= 0x13) { /* CIOBX */
874 ctrl->push_flag = 1;
875 ctrl->slot_switch_type = 1;
876 ctrl->push_button = 1;
877 ctrl->pci_config_space = 1;
878 ctrl->defeature_PHP = 1;
879 ctrl->pcix_support = 1;
880 ctrl->pcix_speed_capability = 1;
881 pci_read_config_byte(pdev, 0x41, &bus_cap);
882 if (bus_cap & 0x80) {
883 dbg("bus max supports 133MHz PCI-X\n");
884 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
885 break;
886 }
887 if (bus_cap & 0x40) {
888 dbg("bus max supports 100MHz PCI-X\n");
889 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
890 break;
891 }
892 if (bus_cap & 20) {
893 dbg("bus max supports 66MHz PCI-X\n");
894 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
895 break;
896 }
897 if (bus_cap & 10) {
898 dbg("bus max supports 66MHz PCI\n");
899 ctrl->speed_capability = PCI_SPEED_66MHz;
900 break;
901 }
902
903 break;
904 }
905
906 switch (subsystem_deviceid) {
907 case PCI_SUB_HPC_ID:
908 /* Original 6500/7000 implementation */
909 ctrl->slot_switch_type = 1;
910 ctrl->speed_capability = PCI_SPEED_33MHz;
911 ctrl->push_button = 0;
912 ctrl->pci_config_space = 1;
913 ctrl->defeature_PHP = 1;
914 ctrl->pcix_support = 0;
915 ctrl->pcix_speed_capability = 0;
916 break;
917 case PCI_SUB_HPC_ID2:
918 /* First Pushbutton implementation */
919 ctrl->push_flag = 1;
920 ctrl->slot_switch_type = 1;
921 ctrl->speed_capability = PCI_SPEED_33MHz;
922 ctrl->push_button = 1;
923 ctrl->pci_config_space = 1;
924 ctrl->defeature_PHP = 1;
925 ctrl->pcix_support = 0;
926 ctrl->pcix_speed_capability = 0;
927 break;
928 case PCI_SUB_HPC_ID_INTC:
929 /* Third party (6500/7000) */
930 ctrl->slot_switch_type = 1;
931 ctrl->speed_capability = PCI_SPEED_33MHz;
932 ctrl->push_button = 0;
933 ctrl->pci_config_space = 1;
934 ctrl->defeature_PHP = 1;
935 ctrl->pcix_support = 0;
936 ctrl->pcix_speed_capability = 0;
937 break;
938 case PCI_SUB_HPC_ID3:
939 /* First 66 Mhz implementation */
940 ctrl->push_flag = 1;
941 ctrl->slot_switch_type = 1;
942 ctrl->speed_capability = PCI_SPEED_66MHz;
943 ctrl->push_button = 1;
944 ctrl->pci_config_space = 1;
945 ctrl->defeature_PHP = 1;
946 ctrl->pcix_support = 0;
947 ctrl->pcix_speed_capability = 0;
948 break;
949 case PCI_SUB_HPC_ID4:
950 /* First PCI-X implementation, 100MHz */
951 ctrl->push_flag = 1;
952 ctrl->slot_switch_type = 1;
953 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
954 ctrl->push_button = 1;
955 ctrl->pci_config_space = 1;
956 ctrl->defeature_PHP = 1;
957 ctrl->pcix_support = 1;
958 ctrl->pcix_speed_capability = 0;
959 break;
960 default:
961 err(msg_HPC_not_supported);
962 rc = -ENODEV;
963 goto err_free_ctrl;
964 }
965 break;
966
967 case PCI_VENDOR_ID_INTEL:
968 /* Check for speed capability (0=33, 1=66) */
969 if (subsystem_deviceid & 0x0001) {
970 ctrl->speed_capability = PCI_SPEED_66MHz;
971 } else {
972 ctrl->speed_capability = PCI_SPEED_33MHz;
973 }
974
975 /* Check for push button */
976 if (subsystem_deviceid & 0x0002) {
977 /* no push button */
978 ctrl->push_button = 0;
979 } else {
980 /* push button supported */
981 ctrl->push_button = 1;
982 }
983
984 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
985 if (subsystem_deviceid & 0x0004) {
986 /* no switch */
987 ctrl->slot_switch_type = 0;
988 } else {
989 /* switch */
990 ctrl->slot_switch_type = 1;
991 }
992
993 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
994 if (subsystem_deviceid & 0x0008) {
995 ctrl->defeature_PHP = 1; // PHP supported
996 } else {
997 ctrl->defeature_PHP = 0; // PHP not supported
998 }
999
1000 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
1001 if (subsystem_deviceid & 0x0010) {
1002 ctrl->alternate_base_address = 1; // supported
1003 } else {
1004 ctrl->alternate_base_address = 0; // not supported
1005 }
1006
1007 /* PCI Config Space Index (0=not supported, 1=supported) */
1008 if (subsystem_deviceid & 0x0020) {
1009 ctrl->pci_config_space = 1; // supported
1010 } else {
1011 ctrl->pci_config_space = 0; // not supported
1012 }
1013
1014 /* PCI-X support */
1015 if (subsystem_deviceid & 0x0080) {
1016 /* PCI-X capable */
1017 ctrl->pcix_support = 1;
1018 /* Frequency of operation in PCI-X mode */
1019 if (subsystem_deviceid & 0x0040) {
1020 /* 133MHz PCI-X if bit 7 is 1 */
1021 ctrl->pcix_speed_capability = 1;
1022 } else {
1023 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1024 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1025 ctrl->pcix_speed_capability = 0;
1026 }
1027 } else {
1028 /* Conventional PCI */
1029 ctrl->pcix_support = 0;
1030 ctrl->pcix_speed_capability = 0;
1031 }
1032 break;
1033
1034 default:
1035 err(msg_HPC_not_supported);
1036 rc = -ENODEV;
1037 goto err_free_ctrl;
1038 }
1039
1040 } else {
1041 err(msg_HPC_not_supported);
1042 return -ENODEV;
1043 }
1044
1045 // Tell the user that we found one.
1046 info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1047 pdev->bus->number);
1048
1049 dbg("Hotplug controller capabilities:\n");
1050 dbg(" speed_capability %d\n", ctrl->speed_capability);
1051 dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ?
1052 "switch present" : "no switch");
1053 dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ?
1054 "PHP supported" : "PHP not supported");
1055 dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ?
1056 "supported" : "not supported");
1057 dbg(" pci_config_space %s\n", ctrl->pci_config_space ?
1058 "supported" : "not supported");
1059 dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ?
1060 "supported" : "not supported");
1061 dbg(" pcix_support %s\n", ctrl->pcix_support ?
1062 "supported" : "not supported");
1063
1064 ctrl->pci_dev = pdev;
1065 pci_set_drvdata(pdev, ctrl);
1066
1067 /* make our own copy of the pci bus structure,
1068 * as we like tweaking it a lot */
1069 ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1070 if (!ctrl->pci_bus) {
1071 err("out of memory\n");
1072 rc = -ENOMEM;
1073 goto err_free_ctrl;
1074 }
1075 memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1076
1077 ctrl->bus = pdev->bus->number;
1078 ctrl->rev = rev;
1079 dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1080 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1081
1082 mutex_init(&ctrl->crit_sect);
1083 init_waitqueue_head(&ctrl->queue);
1084
1085 /* initialize our threads if they haven't already been started up */
1086 rc = one_time_init();
1087 if (rc) {
1088 goto err_free_bus;
1089 }
1090
1091 dbg("pdev = %p\n", pdev);
1092 dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1093 dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1094
1095 if (!request_mem_region(pci_resource_start(pdev, 0),
1096 pci_resource_len(pdev, 0), MY_NAME)) {
1097 err("cannot reserve MMIO region\n");
1098 rc = -ENOMEM;
1099 goto err_free_bus;
1100 }
1101
1102 ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1103 pci_resource_len(pdev, 0));
1104 if (!ctrl->hpc_reg) {
1105 err("cannot remap MMIO region %llx @ %llx\n",
1106 (unsigned long long)pci_resource_len(pdev, 0),
1107 (unsigned long long)pci_resource_start(pdev, 0));
1108 rc = -ENODEV;
1109 goto err_free_mem_region;
1110 }
1111
1112 // Check for 66Mhz operation
1113 ctrl->speed = get_controller_speed(ctrl);
1114
1115
1116 /********************************************************
1117 *
1118 * Save configuration headers for this and
1119 * subordinate PCI buses
1120 *
1121 ********************************************************/
1122
1123 // find the physical slot number of the first hot plug slot
1124
1125 /* Get slot won't work for devices behind bridges, but
1126 * in this case it will always be called for the "base"
1127 * bus/dev/func of a slot.
1128 * CS: this is leveraging the PCIIRQ routing code from the kernel
1129 * (pci-pc.c: get_irq_routing_table) */
1130 rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1131 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1132 &(ctrl->first_slot));
1133 dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1134 ctrl->first_slot, rc);
1135 if (rc) {
1136 err(msg_initialization_err, rc);
1137 goto err_iounmap;
1138 }
1139
1140 // Store PCI Config Space for all devices on this bus
1141 rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1142 if (rc) {
1143 err("%s: unable to save PCI configuration data, error %d\n",
1144 __FUNCTION__, rc);
1145 goto err_iounmap;
1146 }
1147
1148 /*
1149 * Get IO, memory, and IRQ resources for new devices
1150 */
1151 // The next line is required for cpqhp_find_available_resources
1152 ctrl->interrupt = pdev->irq;
1153 if (ctrl->interrupt < 0x10) {
1154 cpqhp_legacy_mode = 1;
1155 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1156 }
1157
1158 ctrl->cfgspc_irq = 0;
1159 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1160
1161 rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1162 ctrl->add_support = !rc;
1163 if (rc) {
1164 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1165 err("unable to locate PCI configuration resources for hot plug add.\n");
1166 goto err_iounmap;
1167 }
1168
1169 /*
1170 * Finish setting up the hot plug ctrl device
1171 */
1172 ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1173 dbg("NumSlots %d \n", ctrl->slot_device_offset);
1174
1175 ctrl->next_event = 0;
1176
1177 /* Setup the slot information structures */
1178 rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1179 if (rc) {
1180 err(msg_initialization_err, 6);
1181 err("%s: unable to save PCI configuration data, error %d\n",
1182 __FUNCTION__, rc);
1183 goto err_iounmap;
1184 }
1185
1186 /* Mask all general input interrupts */
1187 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1188
1189 /* set up the interrupt */
1190 dbg("HPC interrupt = %d \n", ctrl->interrupt);
1191 if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1192 IRQF_SHARED, MY_NAME, ctrl)) {
1193 err("Can't get irq %d for the hotplug pci controller\n",
1194 ctrl->interrupt);
1195 rc = -ENODEV;
1196 goto err_iounmap;
1197 }
1198
1199 /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1200 temp_word = readw(ctrl->hpc_reg + MISC);
1201 temp_word |= 0x4006;
1202 writew(temp_word, ctrl->hpc_reg + MISC);
1203
1204 // Changed 05/05/97 to clear all interrupts at start
1205 writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1206
1207 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1208
1209 writel(0x0L, ctrl->hpc_reg + INT_MASK);
1210
1211 if (!cpqhp_ctrl_list) {
1212 cpqhp_ctrl_list = ctrl;
1213 ctrl->next = NULL;
1214 } else {
1215 ctrl->next = cpqhp_ctrl_list;
1216 cpqhp_ctrl_list = ctrl;
1217 }
1218
1219 // turn off empty slots here unless command line option "ON" set
1220 // Wait for exclusive access to hardware
1221 mutex_lock(&ctrl->crit_sect);
1222
1223 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1224
1225 // find first device number for the ctrl
1226 device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1227
1228 while (num_of_slots) {
1229 dbg("num_of_slots: %d\n", num_of_slots);
1230 func = cpqhp_slot_find(ctrl->bus, device, 0);
1231 if (!func)
1232 break;
1233
1234 hp_slot = func->device - ctrl->slot_device_offset;
1235 dbg("hp_slot: %d\n", hp_slot);
1236
1237 // We have to save the presence info for these slots
1238 temp_word = ctrl->ctrl_int_comp >> 16;
1239 func->presence_save = (temp_word >> hp_slot) & 0x01;
1240 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1241
1242 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1243 func->switch_save = 0;
1244 } else {
1245 func->switch_save = 0x10;
1246 }
1247
1248 if (!power_mode) {
1249 if (!func->is_a_board) {
1250 green_LED_off(ctrl, hp_slot);
1251 slot_disable(ctrl, hp_slot);
1252 }
1253 }
1254
1255 device++;
1256 num_of_slots--;
1257 }
1258
1259 if (!power_mode) {
1260 set_SOGO(ctrl);
1261 // Wait for SOBS to be unset
1262 wait_for_ctrl_irq(ctrl);
1263 }
1264
1265 rc = init_SERR(ctrl);
1266 if (rc) {
1267 err("init_SERR failed\n");
1268 mutex_unlock(&ctrl->crit_sect);
1269 goto err_free_irq;
1270 }
1271
1272 // Done with exclusive hardware access
1273 mutex_unlock(&ctrl->crit_sect);
1274
1275 cpqhp_create_debugfs_files(ctrl);
1276
1277 return 0;
1278
1279 err_free_irq:
1280 free_irq(ctrl->interrupt, ctrl);
1281 err_iounmap:
1282 iounmap(ctrl->hpc_reg);
1283 err_free_mem_region:
1284 release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1285 err_free_bus:
1286 kfree(ctrl->pci_bus);
1287 err_free_ctrl:
1288 kfree(ctrl);
1289 err_disable_device:
1290 pci_disable_device(pdev);
1291 return rc;
1292 }
1293
1294
1295 static int one_time_init(void)
1296 {
1297 int loop;
1298 int retval = 0;
1299
1300 if (initialized)
1301 return 0;
1302
1303 power_mode = 0;
1304
1305 retval = pci_print_IRQ_route();
1306 if (retval)
1307 goto error;
1308
1309 dbg("Initialize + Start the notification mechanism \n");
1310
1311 retval = cpqhp_event_start_thread();
1312 if (retval)
1313 goto error;
1314
1315 dbg("Initialize slot lists\n");
1316 for (loop = 0; loop < 256; loop++) {
1317 cpqhp_slot_list[loop] = NULL;
1318 }
1319
1320 // FIXME: We also need to hook the NMI handler eventually.
1321 // this also needs to be worked with Christoph
1322 // register_NMI_handler();
1323
1324 // Map rom address
1325 cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1326 if (!cpqhp_rom_start) {
1327 err ("Could not ioremap memory region for ROM\n");
1328 retval = -EIO;
1329 goto error;
1330 }
1331
1332 /* Now, map the int15 entry point if we are on compaq specific hardware */
1333 compaq_nvram_init(cpqhp_rom_start);
1334
1335 /* Map smbios table entry point structure */
1336 smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1337 cpqhp_rom_start + ROM_PHY_LEN);
1338 if (!smbios_table) {
1339 err ("Could not find the SMBIOS pointer in memory\n");
1340 retval = -EIO;
1341 goto error_rom_start;
1342 }
1343
1344 smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1345 readw(smbios_table + ST_LENGTH));
1346 if (!smbios_start) {
1347 err ("Could not ioremap memory region taken from SMBIOS values\n");
1348 retval = -EIO;
1349 goto error_smbios_start;
1350 }
1351
1352 initialized = 1;
1353
1354 return retval;
1355
1356 error_smbios_start:
1357 iounmap(smbios_start);
1358 error_rom_start:
1359 iounmap(cpqhp_rom_start);
1360 error:
1361 return retval;
1362 }
1363
1364
1365 static void __exit unload_cpqphpd(void)
1366 {
1367 struct pci_func *next;
1368 struct pci_func *TempSlot;
1369 int loop;
1370 u32 rc;
1371 struct controller *ctrl;
1372 struct controller *tctrl;
1373 struct pci_resource *res;
1374 struct pci_resource *tres;
1375
1376 rc = compaq_nvram_store(cpqhp_rom_start);
1377
1378 ctrl = cpqhp_ctrl_list;
1379
1380 while (ctrl) {
1381 if (ctrl->hpc_reg) {
1382 u16 misc;
1383 rc = read_slot_enable (ctrl);
1384
1385 writeb(0, ctrl->hpc_reg + SLOT_SERR);
1386 writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1387
1388 misc = readw(ctrl->hpc_reg + MISC);
1389 misc &= 0xFFFD;
1390 writew(misc, ctrl->hpc_reg + MISC);
1391 }
1392
1393 ctrl_slot_cleanup(ctrl);
1394
1395 res = ctrl->io_head;
1396 while (res) {
1397 tres = res;
1398 res = res->next;
1399 kfree(tres);
1400 }
1401
1402 res = ctrl->mem_head;
1403 while (res) {
1404 tres = res;
1405 res = res->next;
1406 kfree(tres);
1407 }
1408
1409 res = ctrl->p_mem_head;
1410 while (res) {
1411 tres = res;
1412 res = res->next;
1413 kfree(tres);
1414 }
1415
1416 res = ctrl->bus_head;
1417 while (res) {
1418 tres = res;
1419 res = res->next;
1420 kfree(tres);
1421 }
1422
1423 kfree (ctrl->pci_bus);
1424
1425 tctrl = ctrl;
1426 ctrl = ctrl->next;
1427 kfree(tctrl);
1428 }
1429
1430 for (loop = 0; loop < 256; loop++) {
1431 next = cpqhp_slot_list[loop];
1432 while (next != NULL) {
1433 res = next->io_head;
1434 while (res) {
1435 tres = res;
1436 res = res->next;
1437 kfree(tres);
1438 }
1439
1440 res = next->mem_head;
1441 while (res) {
1442 tres = res;
1443 res = res->next;
1444 kfree(tres);
1445 }
1446
1447 res = next->p_mem_head;
1448 while (res) {
1449 tres = res;
1450 res = res->next;
1451 kfree(tres);
1452 }
1453
1454 res = next->bus_head;
1455 while (res) {
1456 tres = res;
1457 res = res->next;
1458 kfree(tres);
1459 }
1460
1461 TempSlot = next;
1462 next = next->next;
1463 kfree(TempSlot);
1464 }
1465 }
1466
1467 // Stop the notification mechanism
1468 if (initialized)
1469 cpqhp_event_stop_thread();
1470
1471 //unmap the rom address
1472 if (cpqhp_rom_start)
1473 iounmap(cpqhp_rom_start);
1474 if (smbios_start)
1475 iounmap(smbios_start);
1476 }
1477
1478
1479
1480 static struct pci_device_id hpcd_pci_tbl[] = {
1481 {
1482 /* handle any PCI Hotplug controller */
1483 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1484 .class_mask = ~0,
1485
1486 /* no matter who makes it */
1487 .vendor = PCI_ANY_ID,
1488 .device = PCI_ANY_ID,
1489 .subvendor = PCI_ANY_ID,
1490 .subdevice = PCI_ANY_ID,
1491
1492 }, { /* end: all zeroes */ }
1493 };
1494
1495 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1496
1497
1498
1499 static struct pci_driver cpqhpc_driver = {
1500 .name = "compaq_pci_hotplug",
1501 .id_table = hpcd_pci_tbl,
1502 .probe = cpqhpc_probe,
1503 /* remove: cpqhpc_remove_one, */
1504 };
1505
1506
1507
1508 static int __init cpqhpc_init(void)
1509 {
1510 int result;
1511
1512 cpqhp_debug = debug;
1513
1514 info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1515 cpqhp_initialize_debugfs();
1516 result = pci_register_driver(&cpqhpc_driver);
1517 dbg("pci_register_driver = %d\n", result);
1518 return result;
1519 }
1520
1521
1522 static void __exit cpqhpc_cleanup(void)
1523 {
1524 dbg("unload_cpqphpd()\n");
1525 unload_cpqphpd();
1526
1527 dbg("pci_unregister_driver\n");
1528 pci_unregister_driver(&cpqhpc_driver);
1529 cpqhp_shutdown_debugfs();
1530 }
1531
1532
1533 module_init(cpqhpc_init);
1534 module_exit(cpqhpc_cleanup);
1535
1536
Linux with added FPC-III support