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[PATCH] shpchp: miscellaneous cleanups
[linux-2.6/mini2440.git] / drivers / pci / hotplug / shpchp_ctrl.c
blob8541180781e12143c1e2d2c66c8f1eac966b891e
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 wait_for_ctrl_irq (ctrl);
252
253 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
254 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
255 __FUNCTION__);
256 err("%s: Error code (%d)\n", __FUNCTION__, rc);
257 up(&ctrl->crit_sect);
258 return WRONG_BUS_FREQUENCY;
259 }
260 up(&ctrl->crit_sect);
261 return rc;
262 }
263
264 static int fix_bus_speed(struct controller *ctrl, struct slot *pslot,
265 u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp,
266 enum pci_bus_speed msp)
267 {
268 int rc = 0;
269
270 if (flag != 0) { /* Other slots on the same bus are occupied */
271 if ( asp < bsp ) {
272 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp);
273 return WRONG_BUS_FREQUENCY;
274 }
275 } else {
276 /* Other slots on the same bus are empty */
277 if (msp == bsp) {
278 /* if adapter_speed >= bus_speed, do nothing */
279 if (asp < bsp) {
280 /*
281 * Try to lower bus speed to accommodate the adapter if other slots
282 * on the same controller are empty
283 */
284 if ((rc = change_bus_speed(ctrl, pslot, asp)))
285 return rc;
286 }
287 } else {
288 if (asp < msp) {
289 if ((rc = change_bus_speed(ctrl, pslot, asp)))
290 return rc;
291 } else {
292 if ((rc = change_bus_speed(ctrl, pslot, msp)))
293 return rc;
294 }
295 }
296 }
297 return rc;
298 }
299
300 /**
301 * board_added - Called after a board has been added to the system.
302 *
303 * Turns power on for the board
304 * Configures board
305 *
306 */
307 static int board_added(struct slot *p_slot)
308 {
309 u8 hp_slot;
310 u8 slots_not_empty = 0;
311 int rc = 0;
312 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
313 u8 pi, mode;
314 struct controller *ctrl = p_slot->ctrl;
315
316 hp_slot = p_slot->device - ctrl->slot_device_offset;
317
318 dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n",
319 __FUNCTION__, p_slot->device,
320 ctrl->slot_device_offset, hp_slot);
321
322 /* Wait for exclusive access to hardware */
323 down(&ctrl->crit_sect);
324
325 /* Power on slot without connecting to bus */
326 rc = p_slot->hpc_ops->power_on_slot(p_slot);
327 if (rc) {
328 err("%s: Failed to power on slot\n", __FUNCTION__);
329 /* Done with exclusive hardware access */
330 up(&ctrl->crit_sect);
331 return -1;
332 }
333
334 /* Wait for the command to complete */
335 wait_for_ctrl_irq (ctrl);
336
337 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
338 if (rc) {
339 err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
340 /* Done with exclusive hardware access */
341 up(&ctrl->crit_sect);
342 return -1;
343 }
344
345
346 if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
347 if (slots_not_empty)
348 return WRONG_BUS_FREQUENCY;
349
350 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
351 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
352 up(&ctrl->crit_sect);
353 return WRONG_BUS_FREQUENCY;
354 }
355 wait_for_ctrl_irq (ctrl);
356
357 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
358 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
359 __FUNCTION__);
360 err("%s: Error code (%d)\n", __FUNCTION__, rc);
361 up(&ctrl->crit_sect);
362 return WRONG_BUS_FREQUENCY;
363 }
364 /* turn on board, blink green LED, turn off Amber LED */
365 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
366 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
367 up(&ctrl->crit_sect);
368 return rc;
369 }
370 wait_for_ctrl_irq (ctrl);
371
372 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
373 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
374 up(&ctrl->crit_sect);
375 return rc;
376 }
377 }
378
379 rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
380 /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
381 /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
382 /* 0xd = PCI-X 133 Mhz 533 */
383 /* This encoding is different from the one used in cur_bus_speed & */
384 /* max_bus_speed */
385
386 if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
387 err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
388 /* Done with exclusive hardware access */
389 up(&ctrl->crit_sect);
390 return WRONG_BUS_FREQUENCY;
391 }
392
393 rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
394 if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
395 err("%s: Can't get bus operation speed\n", __FUNCTION__);
396 /* Done with exclusive hardware access */
397 up(&ctrl->crit_sect);
398 return WRONG_BUS_FREQUENCY;
399 }
400
401 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
402 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
403 err("%s: Can't get max bus operation speed\n", __FUNCTION__);
404 max_bus_speed = bus_speed;
405 }
406
407 /* Done with exclusive hardware access */
408 up(&ctrl->crit_sect);
409
410 if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
411 err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
412 pi = 1;
413 }
414
415 /* Check if there are other slots or devices on the same bus */
416 if (!list_empty(&ctrl->pci_dev->subordinate->devices))
417 slots_not_empty = 1;
418
419 dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__,
420 slots_not_empty, pi);
421 dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
422 adapter_speed, bus_speed, max_bus_speed);
423
424 if (pi == 2) {
425 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
426 if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) {
427 err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__);
428 mode = 0;
429 }
430
431 switch (adapter_speed) {
432 case PCI_SPEED_133MHz_PCIX_533:
433 case PCI_SPEED_133MHz_PCIX_266:
434 if ((bus_speed != adapter_speed) &&
435 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
436 return rc;
437 break;
438 case PCI_SPEED_133MHz_PCIX_ECC:
439 case PCI_SPEED_133MHz_PCIX:
440 if (mode) { /* Bus - Mode 1 ECC */
441 if ((bus_speed != 0x7) &&
442 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
443 return rc;
444 } else {
445 if ((bus_speed != 0x4) &&
446 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
447 return rc;
448 }
449 break;
450 case PCI_SPEED_66MHz_PCIX_ECC:
451 case PCI_SPEED_66MHz_PCIX:
452 if (mode) { /* Bus - Mode 1 ECC */
453 if ((bus_speed != 0x5) &&
454 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
455 return rc;
456 } else {
457 if ((bus_speed != 0x2) &&
458 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
459 return rc;
460 }
461 break;
462 case PCI_SPEED_66MHz:
463 if ((bus_speed != 0x1) &&
464 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
465 return rc;
466 break;
467 case PCI_SPEED_33MHz:
468 if (bus_speed > 0x0) {
469 if (slots_not_empty == 0) {
470 if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed)))
471 return rc;
472 } else {
473 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
474 return WRONG_BUS_FREQUENCY;
475 }
476 }
477 break;
478 default:
479 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
480 return WRONG_BUS_FREQUENCY;
481 }
482 } else {
483 /* If adpater_speed == bus_speed, nothing to do here */
484 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
485 if ((adapter_speed != bus_speed) &&
486 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
487 return rc;
488 }
489
490 down(&ctrl->crit_sect);
491 /* turn on board, blink green LED, turn off Amber LED */
492 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
493 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
494 up(&ctrl->crit_sect);
495 return rc;
496 }
497 wait_for_ctrl_irq (ctrl);
498
499 if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
500 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
501 up(&ctrl->crit_sect);
502 return rc;
503 }
504
505 up(&ctrl->crit_sect);
506
507 /* Wait for ~1 second */
508 dbg("%s: before long_delay\n", __FUNCTION__);
509 wait_for_ctrl_irq (ctrl);
510 dbg("%s: after long_delay\n", __FUNCTION__);
511
512 dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
513 /* Check for a power fault */
514 if (p_slot->status == 0xFF) {
515 /* power fault occurred, but it was benign */
516 dbg("%s: power fault\n", __FUNCTION__);
517 rc = POWER_FAILURE;
518 p_slot->status = 0;
519 goto err_exit;
520 }
521
522 if (shpchp_configure_device(p_slot)) {
523 err("Cannot add device at 0x%x:0x%x\n", p_slot->bus,
524 p_slot->device);
525 goto err_exit;
526 }
527
528 p_slot->status = 0;
529 p_slot->is_a_board = 0x01;
530 p_slot->pwr_save = 1;
531
532 /* Wait for exclusive access to hardware */
533 down(&ctrl->crit_sect);
534
535 p_slot->hpc_ops->green_led_on(p_slot);
536
537 /* Wait for the command to complete */
538 wait_for_ctrl_irq (ctrl);
539
540 /* Done with exclusive hardware access */
541 up(&ctrl->crit_sect);
542
543 return 0;
544
545 err_exit:
546 /* Wait for exclusive access to hardware */
547 down(&ctrl->crit_sect);
548
549 /* turn off slot, turn on Amber LED, turn off Green LED */
550 rc = p_slot->hpc_ops->slot_disable(p_slot);
551 if (rc) {
552 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
553 /* Done with exclusive hardware access */
554 up(&ctrl->crit_sect);
555 return rc;
556 }
557 /* Wait for the command to complete */
558 wait_for_ctrl_irq (ctrl);
559
560 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
561 if (rc) {
562 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
563 /* Done with exclusive hardware access */
564 up(&ctrl->crit_sect);
565 return rc;
566 }
567
568 /* Done with exclusive hardware access */
569 up(&ctrl->crit_sect);
570
571 return(rc);
572 }
573
574
575 /**
576 * remove_board - Turns off slot and LED's
577 *
578 */
579 static int remove_board(struct slot *p_slot)
580 {
581 struct controller *ctrl = p_slot->ctrl;
582 u8 hp_slot;
583 int rc;
584
585 if (shpchp_unconfigure_device(p_slot))
586 return(1);
587
588 hp_slot = p_slot->device - ctrl->slot_device_offset;
589 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
590
591 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
592
593 /* Change status to shutdown */
594 if (p_slot->is_a_board)
595 p_slot->status = 0x01;
596
597 /* Wait for exclusive access to hardware */
598 down(&ctrl->crit_sect);
599
600 /* turn off slot, turn on Amber LED, turn off Green LED */
601 rc = p_slot->hpc_ops->slot_disable(p_slot);
602 if (rc) {
603 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
604 /* Done with exclusive hardware access */
605 up(&ctrl->crit_sect);
606 return rc;
607 }
608 /* Wait for the command to complete */
609 wait_for_ctrl_irq (ctrl);
610
611 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
612 if (rc) {
613 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
614 /* Done with exclusive hardware access */
615 up(&ctrl->crit_sect);
616 return rc;
617 }
618
619 rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
620 if (rc) {
621 err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
622 /* Done with exclusive hardware access */
623 up(&ctrl->crit_sect);
624 return rc;
625 }
626 /* Wait for the command to complete */
627 wait_for_ctrl_irq (ctrl);
628
629 /* Done with exclusive hardware access */
630 up(&ctrl->crit_sect);
631
632 p_slot->pwr_save = 0;
633 p_slot->is_a_board = 0;
634
635 return 0;
636 }
637
638
639 static void pushbutton_helper_thread (unsigned long data)
640 {
641 pushbutton_pending = data;
642
643 up(&event_semaphore);
644 }
645
646
647 /**
648 * shpchp_pushbutton_thread
649 *
650 * Scheduled procedure to handle blocking stuff for the pushbuttons
651 * Handles all pending events and exits.
652 *
653 */
654 static void shpchp_pushbutton_thread (unsigned long slot)
655 {
656 struct slot *p_slot = (struct slot *) slot;
657 u8 getstatus;
658
659 pushbutton_pending = 0;
660
661 if (!p_slot) {
662 dbg("%s: Error! slot NULL\n", __FUNCTION__);
663 return;
664 }
665
666 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
667 if (getstatus) {
668 p_slot->state = POWEROFF_STATE;
669 dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
670
671 shpchp_disable_slot(p_slot);
672 p_slot->state = STATIC_STATE;
673 } else {
674 p_slot->state = POWERON_STATE;
675 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
676
677 if (shpchp_enable_slot(p_slot)) {
678 /* Wait for exclusive access to hardware */
679 down(&p_slot->ctrl->crit_sect);
680
681 p_slot->hpc_ops->green_led_off(p_slot);
682
683 /* Wait for the command to complete */
684 wait_for_ctrl_irq (p_slot->ctrl);
685
686 /* Done with exclusive hardware access */
687 up(&p_slot->ctrl->crit_sect);
688 }
689 p_slot->state = STATIC_STATE;
690 }
691
692 return;
693 }
694
695
696 /* this is the main worker thread */
697 static int event_thread(void* data)
698 {
699 struct controller *ctrl;
700 lock_kernel();
701 daemonize("shpchpd_event");
702 unlock_kernel();
703
704 while (1) {
705 dbg("!!!!event_thread sleeping\n");
706 down_interruptible (&event_semaphore);
707 dbg("event_thread woken finished = %d\n", event_finished);
708 if (event_finished || signal_pending(current))
709 break;
710 /* Do stuff here */
711 if (pushbutton_pending)
712 shpchp_pushbutton_thread(pushbutton_pending);
713 else
714 for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next)
715 interrupt_event_handler(ctrl);
716 }
717 dbg("event_thread signals exit\n");
718 up(&event_exit);
719 return 0;
720 }
721
722 int shpchp_event_start_thread (void)
723 {
724 int pid;
725
726 /* initialize our semaphores */
727 init_MUTEX_LOCKED(&event_exit);
728 event_finished=0;
729
730 init_MUTEX_LOCKED(&event_semaphore);
731 pid = kernel_thread(event_thread, NULL, 0);
732
733 if (pid < 0) {
734 err ("Can't start up our event thread\n");
735 return -1;
736 }
737 dbg("Our event thread pid = %d\n", pid);
738 return 0;
739 }
740
741
742 void shpchp_event_stop_thread (void)
743 {
744 event_finished = 1;
745 dbg("event_thread finish command given\n");
746 up(&event_semaphore);
747 dbg("wait for event_thread to exit\n");
748 down(&event_exit);
749 }
750
751
752 static int update_slot_info (struct slot *slot)
753 {
754 struct hotplug_slot_info *info;
755 int result;
756
757 info = kmalloc(sizeof(*info), GFP_KERNEL);
758 if (!info)
759 return -ENOMEM;
760
761 slot->hpc_ops->get_power_status(slot, &(info->power_status));
762 slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
763 slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
764 slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
765
766 result = pci_hp_change_slot_info(slot->hotplug_slot, info);
767 kfree (info);
768 return result;
769 }
770
771 static void interrupt_event_handler(struct controller *ctrl)
772 {
773 int loop = 0;
774 int change = 1;
775 u8 hp_slot;
776 u8 getstatus;
777 struct slot *p_slot;
778
779 dbg("%s:\n", __FUNCTION__);
780 while (change) {
781 change = 0;
782
783 for (loop = 0; loop < 10; loop++) {
784 if (ctrl->event_queue[loop].event_type != 0) {
785 dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop,
786 ctrl->event_queue[loop].event_type);
787 hp_slot = ctrl->event_queue[loop].hp_slot;
788
789 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
790
791 dbg("%s: hp_slot %d, p_slot %p\n",
792 __FUNCTION__, hp_slot, p_slot);
793
794 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
795 dbg("%s: button cancel\n", __FUNCTION__);
796 del_timer(&p_slot->task_event);
797
798 switch (p_slot->state) {
799 case BLINKINGOFF_STATE:
800 /* Wait for exclusive access to hardware */
801 down(&ctrl->crit_sect);
802
803 p_slot->hpc_ops->green_led_on(p_slot);
804 /* Wait for the command to complete */
805 wait_for_ctrl_irq (ctrl);
806
807 p_slot->hpc_ops->set_attention_status(p_slot, 0);
808
809 /* Wait for the command to complete */
810 wait_for_ctrl_irq (ctrl);
811
812 /* Done with exclusive hardware access */
813 up(&ctrl->crit_sect);
814 break;
815 case BLINKINGON_STATE:
816 /* Wait for exclusive access to hardware */
817 down(&ctrl->crit_sect);
818
819 p_slot->hpc_ops->green_led_off(p_slot);
820 /* Wait for the command to complete */
821 wait_for_ctrl_irq (ctrl);
822
823 p_slot->hpc_ops->set_attention_status(p_slot, 0);
824 /* Wait for the command to complete */
825 wait_for_ctrl_irq (ctrl);
826
827 /* Done with exclusive hardware access */
828 up(&ctrl->crit_sect);
829
830 break;
831 default:
832 warn("Not a valid state\n");
833 return;
834 }
835 info(msg_button_cancel, p_slot->number);
836 p_slot->state = STATIC_STATE;
837 } else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
838 /* Button Pressed (No action on 1st press...) */
839 dbg("%s: Button pressed\n", __FUNCTION__);
840
841 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
842 if (getstatus) {
843 /* slot is on */
844 dbg("%s: slot is on\n", __FUNCTION__);
845 p_slot->state = BLINKINGOFF_STATE;
846 info(msg_button_off, p_slot->number);
847 } else {
848 /* slot is off */
849 dbg("%s: slot is off\n", __FUNCTION__);
850 p_slot->state = BLINKINGON_STATE;
851 info(msg_button_on, p_slot->number);
852 }
853
854 /* Wait for exclusive access to hardware */
855 down(&ctrl->crit_sect);
856
857 /* blink green LED and turn off amber */
858 p_slot->hpc_ops->green_led_blink(p_slot);
859 /* Wait for the command to complete */
860 wait_for_ctrl_irq (ctrl);
861
862 p_slot->hpc_ops->set_attention_status(p_slot, 0);
863
864 /* Wait for the command to complete */
865 wait_for_ctrl_irq (ctrl);
866
867 /* Done with exclusive hardware access */
868 up(&ctrl->crit_sect);
869
870 init_timer(&p_slot->task_event);
871 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
872 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
873 p_slot->task_event.data = (unsigned long) p_slot;
874
875 dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot);
876 add_timer(&p_slot->task_event);
877 } else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
878 /***********POWER FAULT********************/
879 dbg("%s: power fault\n", __FUNCTION__);
880 /* Wait for exclusive access to hardware */
881 down(&ctrl->crit_sect);
882
883 p_slot->hpc_ops->set_attention_status(p_slot, 1);
884 /* Wait for the command to complete */
885 wait_for_ctrl_irq (ctrl);
886
887 p_slot->hpc_ops->green_led_off(p_slot);
888 /* Wait for the command to complete */
889 wait_for_ctrl_irq (ctrl);
890
891 /* Done with exclusive hardware access */
892 up(&ctrl->crit_sect);
893 } else {
894 /* refresh notification */
895 if (p_slot)
896 update_slot_info(p_slot);
897 }
898
899 ctrl->event_queue[loop].event_type = 0;
900
901 change = 1;
902 }
903 } /* End of FOR loop */
904 }
905
906 return;
907 }
908
909
910 int shpchp_enable_slot (struct slot *p_slot)
911 {
912 u8 getstatus = 0;
913 int rc;
914
915 /* Check to see if (latch closed, card present, power off) */
916 down(&p_slot->ctrl->crit_sect);
917 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
918 if (rc || !getstatus) {
919 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
920 up(&p_slot->ctrl->crit_sect);
921 return -ENODEV;
922 }
923 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
924 if (rc || getstatus) {
925 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
926 up(&p_slot->ctrl->crit_sect);
927 return -ENODEV;
928 }
929 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
930 if (rc || getstatus) {
931 info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
932 up(&p_slot->ctrl->crit_sect);
933 return -ENODEV;
934 }
935 up(&p_slot->ctrl->crit_sect);
936
937 p_slot->is_a_board = 1;
938
939 /* We have to save the presence info for these slots */
940 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
941 p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save));
942 dbg("%s: p_slot->pwr_save %x\n", __FUNCTION__, p_slot->pwr_save);
943 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
944
945 rc = board_added(p_slot);
946 if (rc) {
947 p_slot->hpc_ops->get_adapter_status(p_slot,
948 &(p_slot->presence_save));
949 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
950 }
951
952 update_slot_info(p_slot);
953 return rc;
954 }
955
956
957 int shpchp_disable_slot (struct slot *p_slot)
958 {
959 u8 getstatus = 0;
960 int ret = 0;
961
962 if (!p_slot->ctrl)
963 return -ENODEV;
964
965 /* Check to see if (latch closed, card present, power on) */
966 down(&p_slot->ctrl->crit_sect);
967
968 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
969 if (ret || !getstatus) {
970 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
971 up(&p_slot->ctrl->crit_sect);
972 return -ENODEV;
973 }
974 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
975 if (ret || getstatus) {
976 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
977 up(&p_slot->ctrl->crit_sect);
978 return -ENODEV;
979 }
980 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
981 if (ret || !getstatus) {
982 info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
983 up(&p_slot->ctrl->crit_sect);
984 return -ENODEV;
985 }
986 up(&p_slot->ctrl->crit_sect);
987
988 ret = remove_board(p_slot);
989 update_slot_info(p_slot);
990 return ret;
991 }
992
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