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[IA64] clean up asm/intel_intrin.h
[linux-2.6/x86.git] / drivers / pci / hotplug / shpchp_ctrl.c
blob643252d9bf3b61e0b2333a082761a09950461c38
1 /*
2 * Standard 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 * Copyright (C) 2003-2004 Intel Corporation
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
27 *
28 */
29
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/smp_lock.h>
34 #include <linux/pci.h>
35 #include "../pci.h"
36 #include "shpchp.h"
37
38 static void interrupt_event_handler(struct controller *ctrl);
39
40 static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
41 static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
42 static int event_finished;
43 static unsigned long pushbutton_pending; /* = 0 */
44
45 u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
46 {
47 struct controller *ctrl = (struct controller *) inst_id;
48 struct slot *p_slot;
49 u8 rc = 0;
50 u8 getstatus;
51 struct event_info *taskInfo;
52
53 /* Attention Button Change */
54 dbg("shpchp: Attention button interrupt received.\n");
55
56 /* This is the structure that tells the worker thread what to do */
57 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
58 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
59
60 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
61 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
62
63 ctrl->next_event = (ctrl->next_event + 1) % 10;
64 taskInfo->hp_slot = hp_slot;
65
66 rc++;
67
68 /*
69 * Button pressed - See if need to TAKE ACTION!!!
70 */
71 info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
72 taskInfo->event_type = INT_BUTTON_PRESS;
73
74 if ((p_slot->state == BLINKINGON_STATE)
75 || (p_slot->state == BLINKINGOFF_STATE)) {
76 /* Cancel if we are still blinking; this means that we press the
77 * attention again before the 5 sec. limit expires to cancel hot-add
78 * or hot-remove
79 */
80 taskInfo->event_type = INT_BUTTON_CANCEL;
81 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
82 } else if ((p_slot->state == POWERON_STATE)
83 || (p_slot->state == POWEROFF_STATE)) {
84 /* Ignore if the slot is on power-on or power-off state; this
85 * means that the previous attention button action to hot-add or
86 * hot-remove is undergoing
87 */
88 taskInfo->event_type = INT_BUTTON_IGNORE;
89 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
90 }
91
92 if (rc)
93 up(&event_semaphore); /* signal event thread that new event is posted */
94
95 return 0;
96
97 }
98
99 u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
100 {
101 struct controller *ctrl = (struct controller *) inst_id;
102 struct slot *p_slot;
103 u8 rc = 0;
104 u8 getstatus;
105 struct event_info *taskInfo;
106
107 /* Switch Change */
108 dbg("shpchp: Switch interrupt received.\n");
109
110 /* This is the structure that tells the worker thread
111 * what to do
112 */
113 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
114 ctrl->next_event = (ctrl->next_event + 1) % 10;
115 taskInfo->hp_slot = hp_slot;
116
117 rc++;
118 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
119 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
120 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
121 dbg("%s: Card present %x Power status %x\n", __FUNCTION__,
122 p_slot->presence_save, p_slot->pwr_save);
123
124 if (getstatus) {
125 /*
126 * Switch opened
127 */
128 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
129 taskInfo->event_type = INT_SWITCH_OPEN;
130 if (p_slot->pwr_save && p_slot->presence_save) {
131 taskInfo->event_type = INT_POWER_FAULT;
132 err("Surprise Removal of card\n");
133 }
134 } else {
135 /*
136 * Switch closed
137 */
138 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
139 taskInfo->event_type = INT_SWITCH_CLOSE;
140 }
141
142 if (rc)
143 up(&event_semaphore); /* signal event thread that new event is posted */
144
145 return rc;
146 }
147
148 u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
149 {
150 struct controller *ctrl = (struct controller *) inst_id;
151 struct slot *p_slot;
152 u8 rc = 0;
153 /*u8 temp_byte;*/
154 struct event_info *taskInfo;
155
156 /* Presence Change */
157 dbg("shpchp: Presence/Notify input change.\n");
158
159 /* This is the structure that tells the worker thread
160 * what to do
161 */
162 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
163 ctrl->next_event = (ctrl->next_event + 1) % 10;
164 taskInfo->hp_slot = hp_slot;
165
166 rc++;
167 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
168
169 /*
170 * Save the presence state
171 */
172 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
173 if (p_slot->presence_save) {
174 /*
175 * Card Present
176 */
177 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
178 taskInfo->event_type = INT_PRESENCE_ON;
179 } else {
180 /*
181 * Not Present
182 */
183 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
184 taskInfo->event_type = INT_PRESENCE_OFF;
185 }
186
187 if (rc)
188 up(&event_semaphore); /* signal event thread that new event is posted */
189
190 return rc;
191 }
192
193 u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
194 {
195 struct controller *ctrl = (struct controller *) inst_id;
196 struct slot *p_slot;
197 u8 rc = 0;
198 struct event_info *taskInfo;
199
200 /* Power fault */
201 dbg("shpchp: Power fault interrupt received.\n");
202
203 /* This is the structure that tells the worker thread
204 * what to do
205 */
206 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
207 ctrl->next_event = (ctrl->next_event + 1) % 10;
208 taskInfo->hp_slot = hp_slot;
209
210 rc++;
211 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
212
213 if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
214 /*
215 * Power fault Cleared
216 */
217 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
218 p_slot->status = 0x00;
219 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
220 } else {
221 /*
222 * Power fault
223 */
224 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
225 taskInfo->event_type = INT_POWER_FAULT;
226 /* set power fault status for this board */
227 p_slot->status = 0xFF;
228 info("power fault bit %x set\n", hp_slot);
229 }
230 if (rc)
231 up(&event_semaphore); /* signal event thread that new event is posted */
232
233 return rc;
234 }
235
236 /* The following routines constitute the bulk of the
237 hotplug controller logic
238 */
239 static int change_bus_speed(struct controller *ctrl, struct slot *p_slot,
240 enum pci_bus_speed speed)
241 {
242 int rc = 0;
243
244 dbg("%s: change to speed %d\n", __FUNCTION__, speed);
245 down(&ctrl->crit_sect);
246 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
247 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
248 up(&ctrl->crit_sect);
249 return WRONG_BUS_FREQUENCY;
250 }
251
252 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
253 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
254 __FUNCTION__);
255 err("%s: Error code (%d)\n", __FUNCTION__, rc);
256 up(&ctrl->crit_sect);
257 return WRONG_BUS_FREQUENCY;
258 }
259 up(&ctrl->crit_sect);
260 return rc;
261 }
262
263 static int fix_bus_speed(struct controller *ctrl, struct slot *pslot,
264 u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp,
265 enum pci_bus_speed msp)
266 {
267 int rc = 0;
268
269 if (flag != 0) { /* Other slots on the same bus are occupied */
270 if ( asp < bsp ) {
271 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp);
272 return WRONG_BUS_FREQUENCY;
273 }
274 } else {
275 /* Other slots on the same bus are empty */
276 if (msp == bsp) {
277 /* if adapter_speed >= bus_speed, do nothing */
278 if (asp < bsp) {
279 /*
280 * Try to lower bus speed to accommodate the adapter if other slots
281 * on the same controller are empty
282 */
283 if ((rc = change_bus_speed(ctrl, pslot, asp)))
284 return rc;
285 }
286 } else {
287 if (asp < msp) {
288 if ((rc = change_bus_speed(ctrl, pslot, asp)))
289 return rc;
290 } else {
291 if ((rc = change_bus_speed(ctrl, pslot, msp)))
292 return rc;
293 }
294 }
295 }
296 return rc;
297 }
298
299 /**
300 * board_added - Called after a board has been added to the system.
301 *
302 * Turns power on for the board
303 * Configures board
304 *
305 */
306 static int board_added(struct slot *p_slot)
307 {
308 u8 hp_slot;
309 u8 slots_not_empty = 0;
310 int rc = 0;
311 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
312 u8 pi, mode;
313 struct controller *ctrl = p_slot->ctrl;
314
315 hp_slot = p_slot->device - ctrl->slot_device_offset;
316
317 dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n",
318 __FUNCTION__, p_slot->device,
319 ctrl->slot_device_offset, hp_slot);
320
321 /* Wait for exclusive access to hardware */
322 down(&ctrl->crit_sect);
323
324 /* Power on slot without connecting to bus */
325 rc = p_slot->hpc_ops->power_on_slot(p_slot);
326 if (rc) {
327 err("%s: Failed to power on slot\n", __FUNCTION__);
328 /* Done with exclusive hardware access */
329 up(&ctrl->crit_sect);
330 return -1;
331 }
332
333 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
334 if (rc) {
335 err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
336 /* Done with exclusive hardware access */
337 up(&ctrl->crit_sect);
338 return -1;
339 }
340
341
342 if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
343 if (slots_not_empty)
344 return WRONG_BUS_FREQUENCY;
345
346 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
347 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
348 up(&ctrl->crit_sect);
349 return WRONG_BUS_FREQUENCY;
350 }
351
352 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
353 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
354 __FUNCTION__);
355 err("%s: Error code (%d)\n", __FUNCTION__, rc);
356 up(&ctrl->crit_sect);
357 return WRONG_BUS_FREQUENCY;
358 }
359 /* turn on board, blink green LED, turn off Amber LED */
360 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
361 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
362 up(&ctrl->crit_sect);
363 return rc;
364 }
365
366 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
367 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
368 up(&ctrl->crit_sect);
369 return rc;
370 }
371 }
372
373 rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
374 /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
375 /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
376 /* 0xd = PCI-X 133 Mhz 533 */
377 /* This encoding is different from the one used in cur_bus_speed & */
378 /* max_bus_speed */
379
380 if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
381 err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
382 /* Done with exclusive hardware access */
383 up(&ctrl->crit_sect);
384 return WRONG_BUS_FREQUENCY;
385 }
386
387 rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
388 if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
389 err("%s: Can't get bus operation speed\n", __FUNCTION__);
390 /* Done with exclusive hardware access */
391 up(&ctrl->crit_sect);
392 return WRONG_BUS_FREQUENCY;
393 }
394
395 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
396 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
397 err("%s: Can't get max bus operation speed\n", __FUNCTION__);
398 max_bus_speed = bus_speed;
399 }
400
401 /* Done with exclusive hardware access */
402 up(&ctrl->crit_sect);
403
404 if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
405 err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
406 pi = 1;
407 }
408
409 /* Check if there are other slots or devices on the same bus */
410 if (!list_empty(&ctrl->pci_dev->subordinate->devices))
411 slots_not_empty = 1;
412
413 dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__,
414 slots_not_empty, pi);
415 dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
416 adapter_speed, bus_speed, max_bus_speed);
417
418 if (pi == 2) {
419 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
420 if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) {
421 err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__);
422 mode = 0;
423 }
424
425 switch (adapter_speed) {
426 case PCI_SPEED_133MHz_PCIX_533:
427 case PCI_SPEED_133MHz_PCIX_266:
428 if ((bus_speed != adapter_speed) &&
429 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
430 return rc;
431 break;
432 case PCI_SPEED_133MHz_PCIX_ECC:
433 case PCI_SPEED_133MHz_PCIX:
434 if (mode) { /* Bus - Mode 1 ECC */
435 if ((bus_speed != 0x7) &&
436 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
437 return rc;
438 } else {
439 if ((bus_speed != 0x4) &&
440 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
441 return rc;
442 }
443 break;
444 case PCI_SPEED_66MHz_PCIX_ECC:
445 case PCI_SPEED_66MHz_PCIX:
446 if (mode) { /* Bus - Mode 1 ECC */
447 if ((bus_speed != 0x5) &&
448 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
449 return rc;
450 } else {
451 if ((bus_speed != 0x2) &&
452 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
453 return rc;
454 }
455 break;
456 case PCI_SPEED_66MHz:
457 if ((bus_speed != 0x1) &&
458 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
459 return rc;
460 break;
461 case PCI_SPEED_33MHz:
462 if (bus_speed > 0x0) {
463 if (slots_not_empty == 0) {
464 if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed)))
465 return rc;
466 } else {
467 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
468 return WRONG_BUS_FREQUENCY;
469 }
470 }
471 break;
472 default:
473 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
474 return WRONG_BUS_FREQUENCY;
475 }
476 } else {
477 /* If adpater_speed == bus_speed, nothing to do here */
478 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
479 if ((adapter_speed != bus_speed) &&
480 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
481 return rc;
482 }
483
484 down(&ctrl->crit_sect);
485 /* turn on board, blink green LED, turn off Amber LED */
486 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
487 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
488 up(&ctrl->crit_sect);
489 return rc;
490 }
491
492 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
493 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
494 up(&ctrl->crit_sect);
495 return rc;
496 }
497
498 up(&ctrl->crit_sect);
499
500 /* Wait for ~1 second */
501 wait_for_ctrl_irq (ctrl);
502
503 dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
504 /* Check for a power fault */
505 if (p_slot->status == 0xFF) {
506 /* power fault occurred, but it was benign */
507 dbg("%s: power fault\n", __FUNCTION__);
508 rc = POWER_FAILURE;
509 p_slot->status = 0;
510 goto err_exit;
511 }
512
513 if (shpchp_configure_device(p_slot)) {
514 err("Cannot add device at 0x%x:0x%x\n", p_slot->bus,
515 p_slot->device);
516 goto err_exit;
517 }
518
519 p_slot->status = 0;
520 p_slot->is_a_board = 0x01;
521 p_slot->pwr_save = 1;
522
523 /* Wait for exclusive access to hardware */
524 down(&ctrl->crit_sect);
525
526 p_slot->hpc_ops->green_led_on(p_slot);
527
528 /* Done with exclusive hardware access */
529 up(&ctrl->crit_sect);
530
531 return 0;
532
533 err_exit:
534 /* Wait for exclusive access to hardware */
535 down(&ctrl->crit_sect);
536
537 /* turn off slot, turn on Amber LED, turn off Green LED */
538 rc = p_slot->hpc_ops->slot_disable(p_slot);
539 if (rc) {
540 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
541 /* Done with exclusive hardware access */
542 up(&ctrl->crit_sect);
543 return rc;
544 }
545
546 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
547 if (rc) {
548 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
549 /* Done with exclusive hardware access */
550 up(&ctrl->crit_sect);
551 return rc;
552 }
553
554 /* Done with exclusive hardware access */
555 up(&ctrl->crit_sect);
556
557 return(rc);
558 }
559
560
561 /**
562 * remove_board - Turns off slot and LED's
563 *
564 */
565 static int remove_board(struct slot *p_slot)
566 {
567 struct controller *ctrl = p_slot->ctrl;
568 u8 hp_slot;
569 int rc;
570
571 if (shpchp_unconfigure_device(p_slot))
572 return(1);
573
574 hp_slot = p_slot->device - ctrl->slot_device_offset;
575 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
576
577 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
578
579 /* Change status to shutdown */
580 if (p_slot->is_a_board)
581 p_slot->status = 0x01;
582
583 /* Wait for exclusive access to hardware */
584 down(&ctrl->crit_sect);
585
586 /* turn off slot, turn on Amber LED, turn off Green LED */
587 rc = p_slot->hpc_ops->slot_disable(p_slot);
588 if (rc) {
589 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
590 /* Done with exclusive hardware access */
591 up(&ctrl->crit_sect);
592 return rc;
593 }
594
595 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
596 if (rc) {
597 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
598 /* Done with exclusive hardware access */
599 up(&ctrl->crit_sect);
600 return rc;
601 }
602
603 rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
604 if (rc) {
605 err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
606 /* Done with exclusive hardware access */
607 up(&ctrl->crit_sect);
608 return rc;
609 }
610
611 /* Done with exclusive hardware access */
612 up(&ctrl->crit_sect);
613
614 p_slot->pwr_save = 0;
615 p_slot->is_a_board = 0;
616
617 return 0;
618 }
619
620
621 static void pushbutton_helper_thread (unsigned long data)
622 {
623 pushbutton_pending = data;
624
625 up(&event_semaphore);
626 }
627
628
629 /**
630 * shpchp_pushbutton_thread
631 *
632 * Scheduled procedure to handle blocking stuff for the pushbuttons
633 * Handles all pending events and exits.
634 *
635 */
636 static void shpchp_pushbutton_thread (unsigned long slot)
637 {
638 struct slot *p_slot = (struct slot *) slot;
639 u8 getstatus;
640
641 pushbutton_pending = 0;
642
643 if (!p_slot) {
644 dbg("%s: Error! slot NULL\n", __FUNCTION__);
645 return;
646 }
647
648 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
649 if (getstatus) {
650 p_slot->state = POWEROFF_STATE;
651
652 shpchp_disable_slot(p_slot);
653 p_slot->state = STATIC_STATE;
654 } else {
655 p_slot->state = POWERON_STATE;
656
657 if (shpchp_enable_slot(p_slot)) {
658 /* Wait for exclusive access to hardware */
659 down(&p_slot->ctrl->crit_sect);
660
661 p_slot->hpc_ops->green_led_off(p_slot);
662
663 /* Done with exclusive hardware access */
664 up(&p_slot->ctrl->crit_sect);
665 }
666 p_slot->state = STATIC_STATE;
667 }
668
669 return;
670 }
671
672
673 /* this is the main worker thread */
674 static int event_thread(void* data)
675 {
676 struct controller *ctrl;
677 lock_kernel();
678 daemonize("shpchpd_event");
679 unlock_kernel();
680
681 while (1) {
682 dbg("!!!!event_thread sleeping\n");
683 down_interruptible (&event_semaphore);
684 dbg("event_thread woken finished = %d\n", event_finished);
685 if (event_finished || signal_pending(current))
686 break;
687 /* Do stuff here */
688 if (pushbutton_pending)
689 shpchp_pushbutton_thread(pushbutton_pending);
690 else
691 for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next)
692 interrupt_event_handler(ctrl);
693 }
694 dbg("event_thread signals exit\n");
695 up(&event_exit);
696 return 0;
697 }
698
699 int shpchp_event_start_thread (void)
700 {
701 int pid;
702
703 /* initialize our semaphores */
704 init_MUTEX_LOCKED(&event_exit);
705 event_finished=0;
706
707 init_MUTEX_LOCKED(&event_semaphore);
708 pid = kernel_thread(event_thread, NULL, 0);
709
710 if (pid < 0) {
711 err ("Can't start up our event thread\n");
712 return -1;
713 }
714 return 0;
715 }
716
717
718 void shpchp_event_stop_thread (void)
719 {
720 event_finished = 1;
721 up(&event_semaphore);
722 down(&event_exit);
723 }
724
725
726 static int update_slot_info (struct slot *slot)
727 {
728 struct hotplug_slot_info *info;
729 int result;
730
731 info = kmalloc(sizeof(*info), GFP_KERNEL);
732 if (!info)
733 return -ENOMEM;
734
735 slot->hpc_ops->get_power_status(slot, &(info->power_status));
736 slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
737 slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
738 slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
739
740 result = pci_hp_change_slot_info(slot->hotplug_slot, info);
741 kfree (info);
742 return result;
743 }
744
745 static void interrupt_event_handler(struct controller *ctrl)
746 {
747 int loop = 0;
748 int change = 1;
749 u8 hp_slot;
750 u8 getstatus;
751 struct slot *p_slot;
752
753 while (change) {
754 change = 0;
755
756 for (loop = 0; loop < 10; loop++) {
757 if (ctrl->event_queue[loop].event_type != 0) {
758 dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop,
759 ctrl->event_queue[loop].event_type);
760 hp_slot = ctrl->event_queue[loop].hp_slot;
761
762 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
763
764 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
765 dbg("%s: button cancel\n", __FUNCTION__);
766 del_timer(&p_slot->task_event);
767
768 switch (p_slot->state) {
769 case BLINKINGOFF_STATE:
770 /* Wait for exclusive access to hardware */
771 down(&ctrl->crit_sect);
772
773 p_slot->hpc_ops->green_led_on(p_slot);
774
775 p_slot->hpc_ops->set_attention_status(p_slot, 0);
776
777 /* Done with exclusive hardware access */
778 up(&ctrl->crit_sect);
779 break;
780 case BLINKINGON_STATE:
781 /* Wait for exclusive access to hardware */
782 down(&ctrl->crit_sect);
783
784 p_slot->hpc_ops->green_led_off(p_slot);
785
786 p_slot->hpc_ops->set_attention_status(p_slot, 0);
787
788 /* Done with exclusive hardware access */
789 up(&ctrl->crit_sect);
790
791 break;
792 default:
793 warn("Not a valid state\n");
794 return;
795 }
796 info(msg_button_cancel, p_slot->number);
797 p_slot->state = STATIC_STATE;
798 } else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
799 /* Button Pressed (No action on 1st press...) */
800 dbg("%s: Button pressed\n", __FUNCTION__);
801
802 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
803 if (getstatus) {
804 /* slot is on */
805 dbg("%s: slot is on\n", __FUNCTION__);
806 p_slot->state = BLINKINGOFF_STATE;
807 info(msg_button_off, p_slot->number);
808 } else {
809 /* slot is off */
810 dbg("%s: slot is off\n", __FUNCTION__);
811 p_slot->state = BLINKINGON_STATE;
812 info(msg_button_on, p_slot->number);
813 }
814
815 /* Wait for exclusive access to hardware */
816 down(&ctrl->crit_sect);
817
818 /* blink green LED and turn off amber */
819 p_slot->hpc_ops->green_led_blink(p_slot);
820
821 p_slot->hpc_ops->set_attention_status(p_slot, 0);
822
823 /* Done with exclusive hardware access */
824 up(&ctrl->crit_sect);
825
826 init_timer(&p_slot->task_event);
827 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
828 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
829 p_slot->task_event.data = (unsigned long) p_slot;
830
831 dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot);
832 add_timer(&p_slot->task_event);
833 } else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
834 /***********POWER FAULT********************/
835 dbg("%s: power fault\n", __FUNCTION__);
836 /* Wait for exclusive access to hardware */
837 down(&ctrl->crit_sect);
838
839 p_slot->hpc_ops->set_attention_status(p_slot, 1);
840
841 p_slot->hpc_ops->green_led_off(p_slot);
842
843 /* Done with exclusive hardware access */
844 up(&ctrl->crit_sect);
845 } else {
846 /* refresh notification */
847 if (p_slot)
848 update_slot_info(p_slot);
849 }
850
851 ctrl->event_queue[loop].event_type = 0;
852
853 change = 1;
854 }
855 } /* End of FOR loop */
856 }
857
858 return;
859 }
860
861
862 int shpchp_enable_slot (struct slot *p_slot)
863 {
864 u8 getstatus = 0;
865 int rc;
866
867 /* Check to see if (latch closed, card present, power off) */
868 down(&p_slot->ctrl->crit_sect);
869 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
870 if (rc || !getstatus) {
871 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
872 up(&p_slot->ctrl->crit_sect);
873 return -ENODEV;
874 }
875 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
876 if (rc || getstatus) {
877 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
878 up(&p_slot->ctrl->crit_sect);
879 return -ENODEV;
880 }
881 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
882 if (rc || getstatus) {
883 info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
884 up(&p_slot->ctrl->crit_sect);
885 return -ENODEV;
886 }
887 up(&p_slot->ctrl->crit_sect);
888
889 p_slot->is_a_board = 1;
890
891 /* We have to save the presence info for these slots */
892 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
893 p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save));
894 dbg("%s: p_slot->pwr_save %x\n", __FUNCTION__, p_slot->pwr_save);
895 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
896
897 if(((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD) ||
898 (p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458))
899 && p_slot->ctrl->num_slots == 1) {
900 /* handle amd pogo errata; this must be done before enable */
901 amd_pogo_errata_save_misc_reg(p_slot);
902 rc = board_added(p_slot);
903 /* handle amd pogo errata; this must be done after enable */
904 amd_pogo_errata_restore_misc_reg(p_slot);
905 } else
906 rc = board_added(p_slot);
907
908 if (rc) {
909 p_slot->hpc_ops->get_adapter_status(p_slot,
910 &(p_slot->presence_save));
911 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
912 }
913
914 update_slot_info(p_slot);
915 return rc;
916 }
917
918
919 int shpchp_disable_slot (struct slot *p_slot)
920 {
921 u8 getstatus = 0;
922 int ret = 0;
923
924 if (!p_slot->ctrl)
925 return -ENODEV;
926
927 /* Check to see if (latch closed, card present, power on) */
928 down(&p_slot->ctrl->crit_sect);
929
930 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
931 if (ret || !getstatus) {
932 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
933 up(&p_slot->ctrl->crit_sect);
934 return -ENODEV;
935 }
936 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
937 if (ret || getstatus) {
938 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
939 up(&p_slot->ctrl->crit_sect);
940 return -ENODEV;
941 }
942 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
943 if (ret || !getstatus) {
944 info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
945 up(&p_slot->ctrl->crit_sect);
946 return -ENODEV;
947 }
948 up(&p_slot->ctrl->crit_sect);
949
950 ret = remove_board(p_slot);
951 update_slot_info(p_slot);
952 return ret;
953 }
954
x86 "subsystem" repository