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Commit | Line | Data |
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1da177e4 LT |
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 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
1da177e4 | 33 | #include <linux/pci.h> |
f7391f53 | 34 | #include <linux/workqueue.h> |
dbd7a788 | 35 | #include "../pci.h" |
1da177e4 | 36 | #include "shpchp.h" |
1da177e4 | 37 | |
c4028958 | 38 | static void interrupt_event_handler(struct work_struct *work); |
a246fa4e KK |
39 | static int shpchp_enable_slot(struct slot *p_slot); |
40 | static int shpchp_disable_slot(struct slot *p_slot); | |
1da177e4 | 41 | |
f7391f53 KK |
42 | static int queue_interrupt_event(struct slot *p_slot, u32 event_type) |
43 | { | |
44 | struct event_info *info; | |
45 | ||
46 | info = kmalloc(sizeof(*info), GFP_ATOMIC); | |
47 | if (!info) | |
48 | return -ENOMEM; | |
49 | ||
50 | info->event_type = event_type; | |
51 | info->p_slot = p_slot; | |
c4028958 | 52 | INIT_WORK(&info->work, interrupt_event_handler); |
f7391f53 | 53 | |
a246fa4e | 54 | schedule_work(&info->work); |
f7391f53 KK |
55 | |
56 | return 0; | |
57 | } | |
1da177e4 | 58 | |
0abe68ce | 59 | u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl) |
1da177e4 | 60 | { |
1da177e4 | 61 | struct slot *p_slot; |
f7391f53 | 62 | u32 event_type; |
1da177e4 LT |
63 | |
64 | /* Attention Button Change */ | |
65 | dbg("shpchp: Attention button interrupt received.\n"); | |
9f593e30 | 66 | |
1da177e4 | 67 | p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
2178bfad | 68 | p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
1da177e4 LT |
69 | |
70 | /* | |
71 | * Button pressed - See if need to TAKE ACTION!!! | |
72 | */ | |
66f17055 | 73 | info("Button pressed on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 74 | event_type = INT_BUTTON_PRESS; |
1da177e4 | 75 | |
f7391f53 | 76 | queue_interrupt_event(p_slot, event_type); |
1da177e4 LT |
77 | |
78 | return 0; | |
79 | ||
80 | } | |
81 | ||
0abe68ce | 82 | u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl) |
1da177e4 | 83 | { |
1da177e4 | 84 | struct slot *p_slot; |
1da177e4 | 85 | u8 getstatus; |
f7391f53 | 86 | u32 event_type; |
1da177e4 LT |
87 | |
88 | /* Switch Change */ | |
89 | dbg("shpchp: Switch interrupt received.\n"); | |
90 | ||
1da177e4 | 91 | p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
2178bfad | 92 | p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
1da177e4 | 93 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
66bef8c0 | 94 | dbg("%s: Card present %x Power status %x\n", __func__, |
2178bfad | 95 | p_slot->presence_save, p_slot->pwr_save); |
1da177e4 LT |
96 | |
97 | if (getstatus) { | |
98 | /* | |
99 | * Switch opened | |
100 | */ | |
66f17055 | 101 | info("Latch open on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 102 | event_type = INT_SWITCH_OPEN; |
2178bfad | 103 | if (p_slot->pwr_save && p_slot->presence_save) { |
f7391f53 | 104 | event_type = INT_POWER_FAULT; |
1da177e4 LT |
105 | err("Surprise Removal of card\n"); |
106 | } | |
107 | } else { | |
108 | /* | |
109 | * Switch closed | |
110 | */ | |
66f17055 | 111 | info("Latch close on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 112 | event_type = INT_SWITCH_CLOSE; |
1da177e4 LT |
113 | } |
114 | ||
f7391f53 | 115 | queue_interrupt_event(p_slot, event_type); |
1da177e4 | 116 | |
f7391f53 | 117 | return 1; |
1da177e4 LT |
118 | } |
119 | ||
0abe68ce | 120 | u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl) |
1da177e4 | 121 | { |
1da177e4 | 122 | struct slot *p_slot; |
f7391f53 | 123 | u32 event_type; |
1da177e4 LT |
124 | |
125 | /* Presence Change */ | |
126 | dbg("shpchp: Presence/Notify input change.\n"); | |
127 | ||
1da177e4 LT |
128 | p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
129 | ||
9f593e30 | 130 | /* |
1da177e4 LT |
131 | * Save the presence state |
132 | */ | |
2178bfad RS |
133 | p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
134 | if (p_slot->presence_save) { | |
1da177e4 LT |
135 | /* |
136 | * Card Present | |
137 | */ | |
66f17055 | 138 | info("Card present on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 139 | event_type = INT_PRESENCE_ON; |
1da177e4 LT |
140 | } else { |
141 | /* | |
142 | * Not Present | |
143 | */ | |
66f17055 | 144 | info("Card not present on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 145 | event_type = INT_PRESENCE_OFF; |
1da177e4 LT |
146 | } |
147 | ||
f7391f53 | 148 | queue_interrupt_event(p_slot, event_type); |
1da177e4 | 149 | |
f7391f53 | 150 | return 1; |
1da177e4 LT |
151 | } |
152 | ||
0abe68ce | 153 | u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl) |
1da177e4 | 154 | { |
1da177e4 | 155 | struct slot *p_slot; |
f7391f53 | 156 | u32 event_type; |
1da177e4 LT |
157 | |
158 | /* Power fault */ | |
159 | dbg("shpchp: Power fault interrupt received.\n"); | |
160 | ||
1da177e4 LT |
161 | p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
162 | ||
163 | if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) { | |
164 | /* | |
165 | * Power fault Cleared | |
166 | */ | |
66f17055 | 167 | info("Power fault cleared on Slot(%s)\n", slot_name(p_slot)); |
2178bfad | 168 | p_slot->status = 0x00; |
f7391f53 | 169 | event_type = INT_POWER_FAULT_CLEAR; |
1da177e4 LT |
170 | } else { |
171 | /* | |
172 | * Power fault | |
173 | */ | |
66f17055 | 174 | info("Power fault on Slot(%s)\n", slot_name(p_slot)); |
f7391f53 | 175 | event_type = INT_POWER_FAULT; |
1da177e4 | 176 | /* set power fault status for this board */ |
2178bfad | 177 | p_slot->status = 0xFF; |
1da177e4 LT |
178 | info("power fault bit %x set\n", hp_slot); |
179 | } | |
1da177e4 | 180 | |
f7391f53 KK |
181 | queue_interrupt_event(p_slot, event_type); |
182 | ||
183 | return 1; | |
1da177e4 LT |
184 | } |
185 | ||
9f593e30 | 186 | /* The following routines constitute the bulk of the |
1da177e4 LT |
187 | hotplug controller logic |
188 | */ | |
ee138334 RS |
189 | static int change_bus_speed(struct controller *ctrl, struct slot *p_slot, |
190 | enum pci_bus_speed speed) | |
9f593e30 | 191 | { |
ee138334 | 192 | int rc = 0; |
1da177e4 | 193 | |
66bef8c0 | 194 | dbg("%s: change to speed %d\n", __func__, speed); |
1da177e4 | 195 | if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) { |
0afabe90 | 196 | err("%s: Issue of set bus speed mode command failed\n", |
66bef8c0 | 197 | __func__); |
1da177e4 LT |
198 | return WRONG_BUS_FREQUENCY; |
199 | } | |
1da177e4 LT |
200 | return rc; |
201 | } | |
202 | ||
ee138334 RS |
203 | static int fix_bus_speed(struct controller *ctrl, struct slot *pslot, |
204 | u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp, | |
205 | enum pci_bus_speed msp) | |
9f593e30 | 206 | { |
ee138334 | 207 | int rc = 0; |
0afabe90 KK |
208 | |
209 | /* | |
210 | * If other slots on the same bus are occupied, we cannot | |
211 | * change the bus speed. | |
212 | */ | |
213 | if (flag) { | |
214 | if (asp < bsp) { | |
215 | err("%s: speed of bus %x and adapter %x mismatch\n", | |
66bef8c0 | 216 | __func__, bsp, asp); |
0afabe90 | 217 | rc = WRONG_BUS_FREQUENCY; |
1da177e4 | 218 | } |
0afabe90 KK |
219 | return rc; |
220 | } | |
221 | ||
222 | if (asp < msp) { | |
223 | if (bsp != asp) | |
224 | rc = change_bus_speed(ctrl, pslot, asp); | |
1da177e4 | 225 | } else { |
0afabe90 KK |
226 | if (bsp != msp) |
227 | rc = change_bus_speed(ctrl, pslot, msp); | |
1da177e4 LT |
228 | } |
229 | return rc; | |
230 | } | |
231 | ||
232 | /** | |
233 | * board_added - Called after a board has been added to the system. | |
26e6c66e | 234 | * @p_slot: target &slot |
1da177e4 | 235 | * |
26e6c66e RD |
236 | * Turns power on for the board. |
237 | * Configures board. | |
1da177e4 | 238 | */ |
ee138334 | 239 | static int board_added(struct slot *p_slot) |
1da177e4 LT |
240 | { |
241 | u8 hp_slot; | |
242 | u8 slots_not_empty = 0; | |
ee138334 | 243 | int rc = 0; |
0afabe90 | 244 | enum pci_bus_speed asp, bsp, msp; |
2178bfad | 245 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 | 246 | |
2178bfad | 247 | hp_slot = p_slot->device - ctrl->slot_device_offset; |
1da177e4 | 248 | |
2178bfad | 249 | dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n", |
66bef8c0 | 250 | __func__, p_slot->device, |
2178bfad | 251 | ctrl->slot_device_offset, hp_slot); |
1da177e4 | 252 | |
1da177e4 LT |
253 | /* Power on slot without connecting to bus */ |
254 | rc = p_slot->hpc_ops->power_on_slot(p_slot); | |
255 | if (rc) { | |
66bef8c0 | 256 | err("%s: Failed to power on slot\n", __func__); |
1da177e4 LT |
257 | return -1; |
258 | } | |
9f593e30 | 259 | |
1da177e4 LT |
260 | if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) { |
261 | if (slots_not_empty) | |
262 | return WRONG_BUS_FREQUENCY; | |
9f593e30 | 263 | |
1da177e4 | 264 | if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) { |
66bef8c0 | 265 | err("%s: Issue of set bus speed mode command failed\n", __func__); |
1da177e4 LT |
266 | return WRONG_BUS_FREQUENCY; |
267 | } | |
9f593e30 | 268 | |
1da177e4 LT |
269 | /* turn on board, blink green LED, turn off Amber LED */ |
270 | if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { | |
66bef8c0 | 271 | err("%s: Issue of Slot Enable command failed\n", __func__); |
1da177e4 LT |
272 | return rc; |
273 | } | |
1da177e4 | 274 | } |
9f593e30 | 275 | |
0afabe90 KK |
276 | rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &asp); |
277 | if (rc) { | |
278 | err("%s: Can't get adapter speed or bus mode mismatch\n", | |
66bef8c0 | 279 | __func__); |
1da177e4 LT |
280 | return WRONG_BUS_FREQUENCY; |
281 | } | |
282 | ||
0afabe90 KK |
283 | rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bsp); |
284 | if (rc) { | |
66bef8c0 | 285 | err("%s: Can't get bus operation speed\n", __func__); |
1da177e4 LT |
286 | return WRONG_BUS_FREQUENCY; |
287 | } | |
288 | ||
0afabe90 KK |
289 | rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &msp); |
290 | if (rc) { | |
66bef8c0 | 291 | err("%s: Can't get max bus operation speed\n", __func__); |
0afabe90 | 292 | msp = bsp; |
1da177e4 LT |
293 | } |
294 | ||
295 | /* Check if there are other slots or devices on the same bus */ | |
296 | if (!list_empty(&ctrl->pci_dev->subordinate->devices)) | |
297 | slots_not_empty = 1; | |
298 | ||
0afabe90 | 299 | dbg("%s: slots_not_empty %d, adapter_speed %d, bus_speed %d, " |
66bef8c0 | 300 | "max_bus_speed %d\n", __func__, slots_not_empty, asp, |
0afabe90 | 301 | bsp, msp); |
1da177e4 | 302 | |
0afabe90 KK |
303 | rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, asp, bsp, msp); |
304 | if (rc) | |
305 | return rc; | |
1da177e4 | 306 | |
1da177e4 LT |
307 | /* turn on board, blink green LED, turn off Amber LED */ |
308 | if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { | |
66bef8c0 | 309 | err("%s: Issue of Slot Enable command failed\n", __func__); |
1da177e4 LT |
310 | return rc; |
311 | } | |
1da177e4 | 312 | |
1da177e4 | 313 | /* Wait for ~1 second */ |
68c0b671 | 314 | msleep(1000); |
1da177e4 | 315 | |
66bef8c0 | 316 | dbg("%s: slot status = %x\n", __func__, p_slot->status); |
1da177e4 | 317 | /* Check for a power fault */ |
2178bfad | 318 | if (p_slot->status == 0xFF) { |
1da177e4 | 319 | /* power fault occurred, but it was benign */ |
66bef8c0 | 320 | dbg("%s: power fault\n", __func__); |
1da177e4 | 321 | rc = POWER_FAILURE; |
2178bfad | 322 | p_slot->status = 0; |
dbd7a788 | 323 | goto err_exit; |
1da177e4 LT |
324 | } |
325 | ||
dbd7a788 RS |
326 | if (shpchp_configure_device(p_slot)) { |
327 | err("Cannot add device at 0x%x:0x%x\n", p_slot->bus, | |
328 | p_slot->device); | |
329 | goto err_exit; | |
330 | } | |
1da177e4 | 331 | |
2178bfad RS |
332 | p_slot->status = 0; |
333 | p_slot->is_a_board = 0x01; | |
334 | p_slot->pwr_save = 1; | |
1da177e4 | 335 | |
dbd7a788 | 336 | p_slot->hpc_ops->green_led_on(p_slot); |
1da177e4 | 337 | |
dbd7a788 | 338 | return 0; |
1da177e4 | 339 | |
dbd7a788 | 340 | err_exit: |
dbd7a788 RS |
341 | /* turn off slot, turn on Amber LED, turn off Green LED */ |
342 | rc = p_slot->hpc_ops->slot_disable(p_slot); | |
343 | if (rc) { | |
66bef8c0 | 344 | err("%s: Issue of Slot Disable command failed\n", __func__); |
dbd7a788 RS |
345 | return rc; |
346 | } | |
1da177e4 | 347 | |
dbd7a788 | 348 | return(rc); |
1da177e4 LT |
349 | } |
350 | ||
351 | ||
352 | /** | |
26e6c66e RD |
353 | * remove_board - Turns off slot and LEDs |
354 | * @p_slot: target &slot | |
1da177e4 | 355 | */ |
ee138334 | 356 | static int remove_board(struct slot *p_slot) |
1da177e4 | 357 | { |
2178bfad | 358 | struct controller *ctrl = p_slot->ctrl; |
1da177e4 | 359 | u8 hp_slot; |
ee138334 | 360 | int rc; |
70b60919 | 361 | |
2178bfad | 362 | if (shpchp_unconfigure_device(p_slot)) |
1da177e4 LT |
363 | return(1); |
364 | ||
2178bfad | 365 | hp_slot = p_slot->device - ctrl->slot_device_offset; |
1da177e4 LT |
366 | p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
367 | ||
66bef8c0 | 368 | dbg("In %s, hp_slot = %d\n", __func__, hp_slot); |
1da177e4 | 369 | |
1da177e4 | 370 | /* Change status to shutdown */ |
2178bfad RS |
371 | if (p_slot->is_a_board) |
372 | p_slot->status = 0x01; | |
1da177e4 | 373 | |
1da177e4 LT |
374 | /* turn off slot, turn on Amber LED, turn off Green LED */ |
375 | rc = p_slot->hpc_ops->slot_disable(p_slot); | |
376 | if (rc) { | |
66bef8c0 | 377 | err("%s: Issue of Slot Disable command failed\n", __func__); |
1da177e4 LT |
378 | return rc; |
379 | } | |
9f593e30 | 380 | |
1da177e4 LT |
381 | rc = p_slot->hpc_ops->set_attention_status(p_slot, 0); |
382 | if (rc) { | |
66bef8c0 | 383 | err("%s: Issue of Set Attention command failed\n", __func__); |
1da177e4 LT |
384 | return rc; |
385 | } | |
1da177e4 | 386 | |
2178bfad RS |
387 | p_slot->pwr_save = 0; |
388 | p_slot->is_a_board = 0; | |
1da177e4 LT |
389 | |
390 | return 0; | |
391 | } | |
392 | ||
393 | ||
a246fa4e KK |
394 | struct pushbutton_work_info { |
395 | struct slot *p_slot; | |
396 | struct work_struct work; | |
397 | }; | |
398 | ||
1da177e4 | 399 | /** |
26e6c66e RD |
400 | * shpchp_pushbutton_thread - handle pushbutton events |
401 | * @work: &struct work_struct to be handled | |
1da177e4 | 402 | * |
26e6c66e | 403 | * Scheduled procedure to handle blocking stuff for the pushbuttons. |
1da177e4 | 404 | * Handles all pending events and exits. |
1da177e4 | 405 | */ |
c4028958 | 406 | static void shpchp_pushbutton_thread(struct work_struct *work) |
1da177e4 | 407 | { |
c4028958 DH |
408 | struct pushbutton_work_info *info = |
409 | container_of(work, struct pushbutton_work_info, work); | |
a246fa4e | 410 | struct slot *p_slot = info->p_slot; |
1da177e4 | 411 | |
a246fa4e KK |
412 | mutex_lock(&p_slot->lock); |
413 | switch (p_slot->state) { | |
414 | case POWEROFF_STATE: | |
415 | mutex_unlock(&p_slot->lock); | |
1da177e4 | 416 | shpchp_disable_slot(p_slot); |
a246fa4e | 417 | mutex_lock(&p_slot->lock); |
1da177e4 | 418 | p_slot->state = STATIC_STATE; |
a246fa4e KK |
419 | break; |
420 | case POWERON_STATE: | |
421 | mutex_unlock(&p_slot->lock); | |
d29aadda | 422 | if (shpchp_enable_slot(p_slot)) |
1da177e4 | 423 | p_slot->hpc_ops->green_led_off(p_slot); |
a246fa4e | 424 | mutex_lock(&p_slot->lock); |
1da177e4 | 425 | p_slot->state = STATIC_STATE; |
a246fa4e KK |
426 | break; |
427 | default: | |
428 | break; | |
429 | } | |
430 | mutex_unlock(&p_slot->lock); | |
431 | ||
432 | kfree(info); | |
433 | } | |
434 | ||
e325e1f0 | 435 | void shpchp_queue_pushbutton_work(struct work_struct *work) |
a246fa4e | 436 | { |
c4028958 | 437 | struct slot *p_slot = container_of(work, struct slot, work.work); |
a246fa4e KK |
438 | struct pushbutton_work_info *info; |
439 | ||
440 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
441 | if (!info) { | |
66bef8c0 | 442 | err("%s: Cannot allocate memory\n", __func__); |
a246fa4e KK |
443 | return; |
444 | } | |
445 | info->p_slot = p_slot; | |
c4028958 | 446 | INIT_WORK(&info->work, shpchp_pushbutton_thread); |
a246fa4e KK |
447 | |
448 | mutex_lock(&p_slot->lock); | |
449 | switch (p_slot->state) { | |
450 | case BLINKINGOFF_STATE: | |
451 | p_slot->state = POWEROFF_STATE; | |
452 | break; | |
453 | case BLINKINGON_STATE: | |
454 | p_slot->state = POWERON_STATE; | |
455 | break; | |
456 | default: | |
457 | goto out; | |
1da177e4 | 458 | } |
a246fa4e KK |
459 | queue_work(shpchp_wq, &info->work); |
460 | out: | |
461 | mutex_unlock(&p_slot->lock); | |
1da177e4 LT |
462 | } |
463 | ||
1da177e4 LT |
464 | static int update_slot_info (struct slot *slot) |
465 | { | |
466 | struct hotplug_slot_info *info; | |
467 | int result; | |
468 | ||
469 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
470 | if (!info) | |
471 | return -ENOMEM; | |
472 | ||
473 | slot->hpc_ops->get_power_status(slot, &(info->power_status)); | |
474 | slot->hpc_ops->get_attention_status(slot, &(info->attention_status)); | |
475 | slot->hpc_ops->get_latch_status(slot, &(info->latch_status)); | |
476 | slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status)); | |
477 | ||
478 | result = pci_hp_change_slot_info(slot->hotplug_slot, info); | |
479 | kfree (info); | |
480 | return result; | |
481 | } | |
482 | ||
a246fa4e KK |
483 | /* |
484 | * Note: This function must be called with slot->lock held | |
485 | */ | |
486 | static void handle_button_press_event(struct slot *p_slot) | |
1da177e4 | 487 | { |
1da177e4 | 488 | u8 getstatus; |
1da177e4 | 489 | |
a246fa4e KK |
490 | switch (p_slot->state) { |
491 | case STATIC_STATE: | |
f7391f53 KK |
492 | p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
493 | if (getstatus) { | |
494 | p_slot->state = BLINKINGOFF_STATE; | |
8352e04e | 495 | info("PCI slot #%s - powering off due to button " |
66f17055 | 496 | "press.\n", slot_name(p_slot)); |
f7391f53 KK |
497 | } else { |
498 | p_slot->state = BLINKINGON_STATE; | |
8352e04e | 499 | info("PCI slot #%s - powering on due to button " |
66f17055 | 500 | "press.\n", slot_name(p_slot)); |
f7391f53 KK |
501 | } |
502 | /* blink green LED and turn off amber */ | |
503 | p_slot->hpc_ops->green_led_blink(p_slot); | |
504 | p_slot->hpc_ops->set_attention_status(p_slot, 0); | |
1da177e4 | 505 | |
a246fa4e KK |
506 | schedule_delayed_work(&p_slot->work, 5*HZ); |
507 | break; | |
508 | case BLINKINGOFF_STATE: | |
509 | case BLINKINGON_STATE: | |
510 | /* | |
511 | * Cancel if we are still blinking; this means that we | |
512 | * press the attention again before the 5 sec. limit | |
513 | * expires to cancel hot-add or hot-remove | |
514 | */ | |
66f17055 | 515 | info("Button cancel on Slot(%s)\n", slot_name(p_slot)); |
66bef8c0 | 516 | dbg("%s: button cancel\n", __func__); |
a246fa4e KK |
517 | cancel_delayed_work(&p_slot->work); |
518 | if (p_slot->state == BLINKINGOFF_STATE) | |
519 | p_slot->hpc_ops->green_led_on(p_slot); | |
520 | else | |
521 | p_slot->hpc_ops->green_led_off(p_slot); | |
522 | p_slot->hpc_ops->set_attention_status(p_slot, 0); | |
8352e04e | 523 | info("PCI slot #%s - action canceled due to button press\n", |
66f17055 | 524 | slot_name(p_slot)); |
a246fa4e KK |
525 | p_slot->state = STATIC_STATE; |
526 | break; | |
527 | case POWEROFF_STATE: | |
528 | case POWERON_STATE: | |
529 | /* | |
530 | * Ignore if the slot is on power-on or power-off state; | |
531 | * this means that the previous attention button action | |
532 | * to hot-add or hot-remove is undergoing | |
533 | */ | |
66f17055 | 534 | info("Button ignore on Slot(%s)\n", slot_name(p_slot)); |
a246fa4e KK |
535 | update_slot_info(p_slot); |
536 | break; | |
537 | default: | |
538 | warn("Not a valid state\n"); | |
539 | break; | |
540 | } | |
541 | } | |
542 | ||
c4028958 | 543 | static void interrupt_event_handler(struct work_struct *work) |
a246fa4e | 544 | { |
c4028958 | 545 | struct event_info *info = container_of(work, struct event_info, work); |
a246fa4e KK |
546 | struct slot *p_slot = info->p_slot; |
547 | ||
548 | mutex_lock(&p_slot->lock); | |
549 | switch (info->event_type) { | |
550 | case INT_BUTTON_PRESS: | |
551 | handle_button_press_event(p_slot); | |
f7391f53 KK |
552 | break; |
553 | case INT_POWER_FAULT: | |
66bef8c0 | 554 | dbg("%s: power fault\n", __func__); |
f7391f53 KK |
555 | p_slot->hpc_ops->set_attention_status(p_slot, 1); |
556 | p_slot->hpc_ops->green_led_off(p_slot); | |
557 | break; | |
558 | default: | |
559 | update_slot_info(p_slot); | |
560 | break; | |
1da177e4 | 561 | } |
a246fa4e | 562 | mutex_unlock(&p_slot->lock); |
1da177e4 | 563 | |
f7391f53 | 564 | kfree(info); |
1da177e4 LT |
565 | } |
566 | ||
567 | ||
a246fa4e | 568 | static int shpchp_enable_slot (struct slot *p_slot) |
1da177e4 LT |
569 | { |
570 | u8 getstatus = 0; | |
ef3be547 | 571 | int rc, retval = -ENODEV; |
1da177e4 LT |
572 | |
573 | /* Check to see if (latch closed, card present, power off) */ | |
6aa4cdd0 | 574 | mutex_lock(&p_slot->ctrl->crit_sect); |
1da177e4 LT |
575 | rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
576 | if (rc || !getstatus) { | |
66f17055 | 577 | info("No adapter on slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 578 | goto out; |
1da177e4 LT |
579 | } |
580 | rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); | |
581 | if (rc || getstatus) { | |
66f17055 | 582 | info("Latch open on slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 583 | goto out; |
1da177e4 LT |
584 | } |
585 | rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); | |
586 | if (rc || getstatus) { | |
66f17055 | 587 | info("Already enabled on slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 588 | goto out; |
1da177e4 | 589 | } |
1da177e4 | 590 | |
2178bfad | 591 | p_slot->is_a_board = 1; |
1da177e4 LT |
592 | |
593 | /* We have to save the presence info for these slots */ | |
2178bfad RS |
594 | p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
595 | p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save)); | |
66bef8c0 | 596 | dbg("%s: p_slot->pwr_save %x\n", __func__, p_slot->pwr_save); |
1da177e4 | 597 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
1da177e4 | 598 | |
53044f35 KD |
599 | if(((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD) || |
600 | (p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458)) | |
601 | && p_slot->ctrl->num_slots == 1) { | |
602 | /* handle amd pogo errata; this must be done before enable */ | |
603 | amd_pogo_errata_save_misc_reg(p_slot); | |
ef3be547 | 604 | retval = board_added(p_slot); |
53044f35 KD |
605 | /* handle amd pogo errata; this must be done after enable */ |
606 | amd_pogo_errata_restore_misc_reg(p_slot); | |
607 | } else | |
ef3be547 | 608 | retval = board_added(p_slot); |
53044f35 | 609 | |
ef3be547 | 610 | if (retval) { |
2178bfad RS |
611 | p_slot->hpc_ops->get_adapter_status(p_slot, |
612 | &(p_slot->presence_save)); | |
1da177e4 | 613 | p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
1da177e4 LT |
614 | } |
615 | ||
2178bfad | 616 | update_slot_info(p_slot); |
ef3be547 KK |
617 | out: |
618 | mutex_unlock(&p_slot->ctrl->crit_sect); | |
619 | return retval; | |
1da177e4 LT |
620 | } |
621 | ||
622 | ||
a246fa4e | 623 | static int shpchp_disable_slot (struct slot *p_slot) |
1da177e4 | 624 | { |
1da177e4 | 625 | u8 getstatus = 0; |
ef3be547 | 626 | int rc, retval = -ENODEV; |
1da177e4 LT |
627 | |
628 | if (!p_slot->ctrl) | |
ee17fd93 | 629 | return -ENODEV; |
1da177e4 | 630 | |
1da177e4 | 631 | /* Check to see if (latch closed, card present, power on) */ |
6aa4cdd0 | 632 | mutex_lock(&p_slot->ctrl->crit_sect); |
1da177e4 | 633 | |
ef3be547 KK |
634 | rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
635 | if (rc || !getstatus) { | |
66f17055 | 636 | info("No adapter on slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 637 | goto out; |
1da177e4 | 638 | } |
ef3be547 KK |
639 | rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
640 | if (rc || getstatus) { | |
66f17055 | 641 | info("Latch open on slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 642 | goto out; |
1da177e4 | 643 | } |
ef3be547 KK |
644 | rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
645 | if (rc || !getstatus) { | |
66f17055 | 646 | info("Already disabled slot(%s)\n", slot_name(p_slot)); |
ef3be547 | 647 | goto out; |
1da177e4 | 648 | } |
1da177e4 | 649 | |
ef3be547 | 650 | retval = remove_board(p_slot); |
2178bfad | 651 | update_slot_info(p_slot); |
ef3be547 KK |
652 | out: |
653 | mutex_unlock(&p_slot->ctrl->crit_sect); | |
654 | return retval; | |
1da177e4 LT |
655 | } |
656 | ||
a246fa4e KK |
657 | int shpchp_sysfs_enable_slot(struct slot *p_slot) |
658 | { | |
659 | int retval = -ENODEV; | |
660 | ||
661 | mutex_lock(&p_slot->lock); | |
662 | switch (p_slot->state) { | |
663 | case BLINKINGON_STATE: | |
664 | cancel_delayed_work(&p_slot->work); | |
665 | case STATIC_STATE: | |
666 | p_slot->state = POWERON_STATE; | |
667 | mutex_unlock(&p_slot->lock); | |
668 | retval = shpchp_enable_slot(p_slot); | |
669 | mutex_lock(&p_slot->lock); | |
670 | p_slot->state = STATIC_STATE; | |
671 | break; | |
672 | case POWERON_STATE: | |
673 | info("Slot %s is already in powering on state\n", | |
66f17055 | 674 | slot_name(p_slot)); |
a246fa4e KK |
675 | break; |
676 | case BLINKINGOFF_STATE: | |
677 | case POWEROFF_STATE: | |
66f17055 | 678 | info("Already enabled on slot %s\n", slot_name(p_slot)); |
a246fa4e KK |
679 | break; |
680 | default: | |
66f17055 | 681 | err("Not a valid state on slot %s\n", slot_name(p_slot)); |
a246fa4e KK |
682 | break; |
683 | } | |
684 | mutex_unlock(&p_slot->lock); | |
685 | ||
686 | return retval; | |
687 | } | |
688 | ||
689 | int shpchp_sysfs_disable_slot(struct slot *p_slot) | |
690 | { | |
691 | int retval = -ENODEV; | |
692 | ||
693 | mutex_lock(&p_slot->lock); | |
694 | switch (p_slot->state) { | |
695 | case BLINKINGOFF_STATE: | |
696 | cancel_delayed_work(&p_slot->work); | |
697 | case STATIC_STATE: | |
698 | p_slot->state = POWEROFF_STATE; | |
699 | mutex_unlock(&p_slot->lock); | |
700 | retval = shpchp_disable_slot(p_slot); | |
701 | mutex_lock(&p_slot->lock); | |
702 | p_slot->state = STATIC_STATE; | |
703 | break; | |
704 | case POWEROFF_STATE: | |
705 | info("Slot %s is already in powering off state\n", | |
66f17055 | 706 | slot_name(p_slot)); |
a246fa4e KK |
707 | break; |
708 | case BLINKINGON_STATE: | |
709 | case POWERON_STATE: | |
66f17055 | 710 | info("Already disabled on slot %s\n", slot_name(p_slot)); |
a246fa4e KK |
711 | break; |
712 | default: | |
66f17055 | 713 | err("Not a valid state on slot %s\n", slot_name(p_slot)); |
a246fa4e KK |
714 | break; |
715 | } | |
716 | mutex_unlock(&p_slot->lock); | |
717 | ||
718 | return retval; | |
719 | } |