2 * Standard Hot Plug Controller Driver
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
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.
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
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.
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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 <linux/workqueue.h>
39 static void interrupt_event_handler(void *data);
41 static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
43 struct event_info *info;
45 info = kmalloc(sizeof(*info), GFP_ATOMIC);
49 info->event_type = event_type;
50 info->p_slot = p_slot;
51 INIT_WORK(&info->work, interrupt_event_handler, info);
53 queue_work(shpchp_wq, &info->work);
58 u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
60 struct controller *ctrl = (struct controller *) inst_id;
64 /* Attention Button Change */
65 dbg("shpchp: Attention button interrupt received.\n");
67 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
68 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
71 * Button pressed - See if need to TAKE ACTION!!!
73 info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
74 event_type = INT_BUTTON_PRESS;
76 if ((p_slot->state == BLINKINGON_STATE)
77 || (p_slot->state == BLINKINGOFF_STATE)) {
78 /* Cancel if we are still blinking; this means that we press the
79 * attention again before the 5 sec. limit expires to cancel hot-add
82 event_type = INT_BUTTON_CANCEL;
83 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
84 } else if ((p_slot->state == POWERON_STATE)
85 || (p_slot->state == POWEROFF_STATE)) {
86 /* Ignore if the slot is on power-on or power-off state; this
87 * means that the previous attention button action to hot-add or
88 * hot-remove is undergoing
90 event_type = INT_BUTTON_IGNORE;
91 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
94 queue_interrupt_event(p_slot, event_type);
100 u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
102 struct controller *ctrl = (struct controller *) inst_id;
108 dbg("shpchp: Switch interrupt received.\n");
110 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
111 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
112 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
113 dbg("%s: Card present %x Power status %x\n", __FUNCTION__,
114 p_slot->presence_save, p_slot->pwr_save);
120 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
121 event_type = INT_SWITCH_OPEN;
122 if (p_slot->pwr_save && p_slot->presence_save) {
123 event_type = INT_POWER_FAULT;
124 err("Surprise Removal of card\n");
130 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
131 event_type = INT_SWITCH_CLOSE;
134 queue_interrupt_event(p_slot, event_type);
139 u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
141 struct controller *ctrl = (struct controller *) inst_id;
145 /* Presence Change */
146 dbg("shpchp: Presence/Notify input change.\n");
148 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
151 * Save the presence state
153 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
154 if (p_slot->presence_save) {
158 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
159 event_type = INT_PRESENCE_ON;
164 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
165 event_type = INT_PRESENCE_OFF;
168 queue_interrupt_event(p_slot, event_type);
173 u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
175 struct controller *ctrl = (struct controller *) inst_id;
180 dbg("shpchp: Power fault interrupt received.\n");
182 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
184 if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
186 * Power fault Cleared
188 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
189 p_slot->status = 0x00;
190 event_type = INT_POWER_FAULT_CLEAR;
195 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
196 event_type = INT_POWER_FAULT;
197 /* set power fault status for this board */
198 p_slot->status = 0xFF;
199 info("power fault bit %x set\n", hp_slot);
202 queue_interrupt_event(p_slot, event_type);
207 /* The following routines constitute the bulk of the
208 hotplug controller logic
210 static int change_bus_speed(struct controller *ctrl, struct slot *p_slot,
211 enum pci_bus_speed speed)
215 dbg("%s: change to speed %d\n", __FUNCTION__, speed);
216 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
217 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
218 return WRONG_BUS_FREQUENCY;
223 static int fix_bus_speed(struct controller *ctrl, struct slot *pslot,
224 u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp,
225 enum pci_bus_speed msp)
229 if (flag != 0) { /* Other slots on the same bus are occupied */
231 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp);
232 return WRONG_BUS_FREQUENCY;
235 /* Other slots on the same bus are empty */
237 /* if adapter_speed >= bus_speed, do nothing */
240 * Try to lower bus speed to accommodate the adapter if other slots
241 * on the same controller are empty
243 if ((rc = change_bus_speed(ctrl, pslot, asp)))
248 if ((rc = change_bus_speed(ctrl, pslot, asp)))
251 if ((rc = change_bus_speed(ctrl, pslot, msp)))
260 * board_added - Called after a board has been added to the system.
262 * Turns power on for the board
266 static int board_added(struct slot *p_slot)
269 u8 slots_not_empty = 0;
271 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
273 struct controller *ctrl = p_slot->ctrl;
275 hp_slot = p_slot->device - ctrl->slot_device_offset;
277 dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n",
278 __FUNCTION__, p_slot->device,
279 ctrl->slot_device_offset, hp_slot);
281 /* Power on slot without connecting to bus */
282 rc = p_slot->hpc_ops->power_on_slot(p_slot);
284 err("%s: Failed to power on slot\n", __FUNCTION__);
288 if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
290 return WRONG_BUS_FREQUENCY;
292 if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
293 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
294 return WRONG_BUS_FREQUENCY;
297 /* turn on board, blink green LED, turn off Amber LED */
298 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
299 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
304 rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
305 /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
306 /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
307 /* 0xd = PCI-X 133 Mhz 533 */
308 /* This encoding is different from the one used in cur_bus_speed & */
311 if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
312 err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
313 return WRONG_BUS_FREQUENCY;
316 rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
317 if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
318 err("%s: Can't get bus operation speed\n", __FUNCTION__);
319 return WRONG_BUS_FREQUENCY;
322 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
323 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
324 err("%s: Can't get max bus operation speed\n", __FUNCTION__);
325 max_bus_speed = bus_speed;
328 if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
329 err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
333 /* Check if there are other slots or devices on the same bus */
334 if (!list_empty(&ctrl->pci_dev->subordinate->devices))
337 dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__,
338 slots_not_empty, pi);
339 dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
340 adapter_speed, bus_speed, max_bus_speed);
343 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
344 if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) {
345 err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__);
349 switch (adapter_speed) {
350 case PCI_SPEED_133MHz_PCIX_533:
351 case PCI_SPEED_133MHz_PCIX_266:
352 if ((bus_speed != adapter_speed) &&
353 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
356 case PCI_SPEED_133MHz_PCIX_ECC:
357 case PCI_SPEED_133MHz_PCIX:
358 if (mode) { /* Bus - Mode 1 ECC */
359 if ((bus_speed != 0x7) &&
360 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
363 if ((bus_speed != 0x4) &&
364 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
368 case PCI_SPEED_66MHz_PCIX_ECC:
369 case PCI_SPEED_66MHz_PCIX:
370 if (mode) { /* Bus - Mode 1 ECC */
371 if ((bus_speed != 0x5) &&
372 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
375 if ((bus_speed != 0x2) &&
376 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
380 case PCI_SPEED_66MHz:
381 if ((bus_speed != 0x1) &&
382 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
385 case PCI_SPEED_33MHz:
386 if (bus_speed > 0x0) {
387 if (slots_not_empty == 0) {
388 if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed)))
391 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
392 return WRONG_BUS_FREQUENCY;
397 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
398 return WRONG_BUS_FREQUENCY;
401 /* If adpater_speed == bus_speed, nothing to do here */
402 dbg("%s: In PI = %d\n", __FUNCTION__, pi);
403 if ((adapter_speed != bus_speed) &&
404 ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
408 /* turn on board, blink green LED, turn off Amber LED */
409 if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
410 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
414 /* Wait for ~1 second */
417 dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
418 /* Check for a power fault */
419 if (p_slot->status == 0xFF) {
420 /* power fault occurred, but it was benign */
421 dbg("%s: power fault\n", __FUNCTION__);
427 if (shpchp_configure_device(p_slot)) {
428 err("Cannot add device at 0x%x:0x%x\n", p_slot->bus,
434 p_slot->is_a_board = 0x01;
435 p_slot->pwr_save = 1;
437 p_slot->hpc_ops->green_led_on(p_slot);
442 /* turn off slot, turn on Amber LED, turn off Green LED */
443 rc = p_slot->hpc_ops->slot_disable(p_slot);
445 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
454 * remove_board - Turns off slot and LED's
457 static int remove_board(struct slot *p_slot)
459 struct controller *ctrl = p_slot->ctrl;
463 if (shpchp_unconfigure_device(p_slot))
466 hp_slot = p_slot->device - ctrl->slot_device_offset;
467 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
469 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
471 /* Change status to shutdown */
472 if (p_slot->is_a_board)
473 p_slot->status = 0x01;
475 /* turn off slot, turn on Amber LED, turn off Green LED */
476 rc = p_slot->hpc_ops->slot_disable(p_slot);
478 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
482 rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
484 err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
488 p_slot->pwr_save = 0;
489 p_slot->is_a_board = 0;
496 * shpchp_pushbutton_thread
498 * Scheduled procedure to handle blocking stuff for the pushbuttons
499 * Handles all pending events and exits.
502 void shpchp_pushbutton_thread(void *data)
504 struct slot *p_slot = data;
507 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
509 p_slot->state = POWEROFF_STATE;
510 shpchp_disable_slot(p_slot);
511 p_slot->state = STATIC_STATE;
513 p_slot->state = POWERON_STATE;
514 if (shpchp_enable_slot(p_slot))
515 p_slot->hpc_ops->green_led_off(p_slot);
516 p_slot->state = STATIC_STATE;
520 static int update_slot_info (struct slot *slot)
522 struct hotplug_slot_info *info;
525 info = kmalloc(sizeof(*info), GFP_KERNEL);
529 slot->hpc_ops->get_power_status(slot, &(info->power_status));
530 slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
531 slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
532 slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
534 result = pci_hp_change_slot_info(slot->hotplug_slot, info);
539 static void interrupt_event_handler(void *data)
541 struct event_info *info = data;
542 struct slot *p_slot = info->p_slot;
545 switch (info->event_type) {
546 case INT_BUTTON_CANCEL:
547 dbg("%s: button cancel\n", __FUNCTION__);
548 cancel_delayed_work(&p_slot->work);
549 switch (p_slot->state) {
550 case BLINKINGOFF_STATE:
551 p_slot->hpc_ops->green_led_on(p_slot);
552 p_slot->hpc_ops->set_attention_status(p_slot, 0);
554 case BLINKINGON_STATE:
555 p_slot->hpc_ops->green_led_off(p_slot);
556 p_slot->hpc_ops->set_attention_status(p_slot, 0);
559 warn("Not a valid state\n");
562 info(msg_button_cancel, p_slot->number);
563 p_slot->state = STATIC_STATE;
565 case INT_BUTTON_PRESS:
566 dbg("%s: Button pressed\n", __FUNCTION__);
567 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
569 p_slot->state = BLINKINGOFF_STATE;
570 info(msg_button_off, p_slot->number);
572 p_slot->state = BLINKINGON_STATE;
573 info(msg_button_on, p_slot->number);
575 /* blink green LED and turn off amber */
576 p_slot->hpc_ops->green_led_blink(p_slot);
577 p_slot->hpc_ops->set_attention_status(p_slot, 0);
579 queue_delayed_work(shpchp_wq, &p_slot->work, 5*HZ);
581 case INT_POWER_FAULT:
582 dbg("%s: power fault\n", __FUNCTION__);
583 p_slot->hpc_ops->set_attention_status(p_slot, 1);
584 p_slot->hpc_ops->green_led_off(p_slot);
587 update_slot_info(p_slot);
595 int shpchp_enable_slot (struct slot *p_slot)
598 int rc, retval = -ENODEV;
600 /* Check to see if (latch closed, card present, power off) */
601 mutex_lock(&p_slot->ctrl->crit_sect);
602 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
603 if (rc || !getstatus) {
604 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
607 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
608 if (rc || getstatus) {
609 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
612 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
613 if (rc || getstatus) {
614 info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
618 p_slot->is_a_board = 1;
620 /* We have to save the presence info for these slots */
621 p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
622 p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save));
623 dbg("%s: p_slot->pwr_save %x\n", __FUNCTION__, p_slot->pwr_save);
624 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
626 if(((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD) ||
627 (p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458))
628 && p_slot->ctrl->num_slots == 1) {
629 /* handle amd pogo errata; this must be done before enable */
630 amd_pogo_errata_save_misc_reg(p_slot);
631 retval = board_added(p_slot);
632 /* handle amd pogo errata; this must be done after enable */
633 amd_pogo_errata_restore_misc_reg(p_slot);
635 retval = board_added(p_slot);
638 p_slot->hpc_ops->get_adapter_status(p_slot,
639 &(p_slot->presence_save));
640 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
643 update_slot_info(p_slot);
645 mutex_unlock(&p_slot->ctrl->crit_sect);
650 int shpchp_disable_slot (struct slot *p_slot)
653 int rc, retval = -ENODEV;
658 /* Check to see if (latch closed, card present, power on) */
659 mutex_lock(&p_slot->ctrl->crit_sect);
661 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
662 if (rc || !getstatus) {
663 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
666 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
667 if (rc || getstatus) {
668 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
671 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
672 if (rc || !getstatus) {
673 info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
677 retval = remove_board(p_slot);
678 update_slot_info(p_slot);
680 mutex_unlock(&p_slot->ctrl->crit_sect);