Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/ioport.h> | |
d568df84 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/list.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
6697c052 | 34 | #include <linux/acpi.h> |
1da177e4 LT |
35 | #ifdef CONFIG_X86 |
36 | #include <asm/mpspec.h> | |
37 | #endif | |
7752d5cf | 38 | #include <linux/pci.h> |
1da177e4 LT |
39 | #include <acpi/acpi_bus.h> |
40 | #include <acpi/acpi_drivers.h> | |
eb27cae8 | 41 | #include <linux/dmi.h> |
1da177e4 | 42 | |
e60cc7a6 BH |
43 | #include "internal.h" |
44 | ||
1da177e4 | 45 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 46 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 47 | |
4be44fcd LB |
48 | struct acpi_device *acpi_root; |
49 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
50 | EXPORT_SYMBOL(acpi_root_dir); |
51 | ||
52 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
53 | ||
6415e12b ZY |
54 | static int set_power_nocheck(const struct dmi_system_id *id) |
55 | { | |
56 | printk(KERN_NOTICE PREFIX "%s detected - " | |
57 | "disable power check in power transistion\n", id->ident); | |
58 | acpi_power_nocheck = 1; | |
59 | return 0; | |
60 | } | |
61 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { | |
62 | { | |
63 | set_power_nocheck, "HP Pavilion 05", { | |
64 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
65 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), | |
66 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, | |
67 | {}, | |
68 | }; | |
69 | ||
70 | ||
1da177e4 LT |
71 | /* -------------------------------------------------------------------------- |
72 | Device Management | |
73 | -------------------------------------------------------------------------- */ | |
74 | ||
4be44fcd | 75 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 76 | { |
4be44fcd | 77 | acpi_status status = AE_OK; |
1da177e4 | 78 | |
1da177e4 LT |
79 | |
80 | if (!device) | |
d550d98d | 81 | return -EINVAL; |
1da177e4 LT |
82 | |
83 | /* TBD: Support fixed-feature devices */ | |
84 | ||
4be44fcd | 85 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 86 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
87 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
88 | handle)); | |
d550d98d | 89 | return -ENODEV; |
1da177e4 LT |
90 | } |
91 | ||
d550d98d | 92 | return 0; |
1da177e4 | 93 | } |
4be44fcd | 94 | |
1da177e4 LT |
95 | EXPORT_SYMBOL(acpi_bus_get_device); |
96 | ||
402ac536 BH |
97 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
98 | unsigned long long *sta) | |
1da177e4 | 99 | { |
402ac536 | 100 | acpi_status status; |
4be44fcd | 101 | |
402ac536 BH |
102 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
103 | if (ACPI_SUCCESS(status)) | |
104 | return AE_OK; | |
1da177e4 | 105 | |
402ac536 BH |
106 | if (status == AE_NOT_FOUND) { |
107 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
108 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
109 | return AE_OK; | |
1da177e4 | 110 | } |
402ac536 BH |
111 | return status; |
112 | } | |
1da177e4 | 113 | |
402ac536 BH |
114 | int acpi_bus_get_status(struct acpi_device *device) |
115 | { | |
116 | acpi_status status; | |
117 | unsigned long long sta; | |
118 | ||
119 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
120 | if (ACPI_FAILURE(status)) | |
121 | return -ENODEV; | |
122 | ||
123 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
124 | |
125 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
126 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
127 | "functional but not present;\n", | |
128 | device->pnp.bus_id, | |
129 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
130 | } |
131 | ||
4be44fcd LB |
132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
133 | device->pnp.bus_id, | |
134 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 135 | return 0; |
1da177e4 | 136 | } |
4be44fcd | 137 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 138 | |
20733939 | 139 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 140 | void *context) |
20733939 ZR |
141 | { |
142 | return; | |
143 | } | |
144 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
145 | ||
146 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
147 | { | |
148 | acpi_status status = AE_OK; | |
149 | ||
150 | if (!*data) | |
151 | return -EINVAL; | |
152 | ||
153 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
154 | if (ACPI_FAILURE(status) || !*data) { | |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
156 | handle)); | |
157 | return -ENODEV; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
163 | ||
1da177e4 LT |
164 | /* -------------------------------------------------------------------------- |
165 | Power Management | |
166 | -------------------------------------------------------------------------- */ | |
167 | ||
4be44fcd | 168 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 169 | { |
4be44fcd LB |
170 | int result = 0; |
171 | acpi_status status = 0; | |
172 | struct acpi_device *device = NULL; | |
27663c58 | 173 | unsigned long long psc = 0; |
1da177e4 | 174 | |
1da177e4 LT |
175 | |
176 | result = acpi_bus_get_device(handle, &device); | |
177 | if (result) | |
d550d98d | 178 | return result; |
1da177e4 LT |
179 | |
180 | *state = ACPI_STATE_UNKNOWN; | |
181 | ||
182 | if (!device->flags.power_manageable) { | |
183 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
184 | if (device->parent) | |
185 | *state = device->parent->power.state; | |
186 | else | |
187 | *state = ACPI_STATE_D0; | |
4be44fcd | 188 | } else { |
1da177e4 | 189 | /* |
aafbcd16 | 190 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
191 | * indirectly (via power resources). |
192 | */ | |
193 | if (device->power.flags.explicit_get) { | |
4be44fcd LB |
194 | status = acpi_evaluate_integer(device->handle, "_PSC", |
195 | NULL, &psc); | |
1da177e4 | 196 | if (ACPI_FAILURE(status)) |
d550d98d | 197 | return -ENODEV; |
4be44fcd LB |
198 | device->power.state = (int)psc; |
199 | } else if (device->power.flags.power_resources) { | |
1da177e4 LT |
200 | result = acpi_power_get_inferred_state(device); |
201 | if (result) | |
d550d98d | 202 | return result; |
1da177e4 LT |
203 | } |
204 | ||
205 | *state = device->power.state; | |
206 | } | |
207 | ||
208 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 209 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 210 | |
d550d98d | 211 | return 0; |
1da177e4 | 212 | } |
1da177e4 | 213 | |
4be44fcd | 214 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 215 | |
4be44fcd | 216 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 217 | { |
4be44fcd LB |
218 | int result = 0; |
219 | acpi_status status = AE_OK; | |
220 | struct acpi_device *device = NULL; | |
221 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 222 | |
1da177e4 LT |
223 | |
224 | result = acpi_bus_get_device(handle, &device); | |
225 | if (result) | |
d550d98d | 226 | return result; |
1da177e4 LT |
227 | |
228 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 229 | return -EINVAL; |
1da177e4 LT |
230 | |
231 | /* Make sure this is a valid target state */ | |
232 | ||
233 | if (!device->flags.power_manageable) { | |
9805cb76 | 234 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 235 | kobject_name(&device->dev.kobj))); |
d550d98d | 236 | return -ENODEV; |
1da177e4 | 237 | } |
b913100d | 238 | /* |
c35923bc | 239 | * Get device's current power state |
b913100d | 240 | */ |
f5adfaa3 ZY |
241 | if (!acpi_power_nocheck) { |
242 | /* | |
243 | * Maybe the incorrect power state is returned on the bogus | |
244 | * bios, which is different with the real power state. | |
245 | * For example: the bios returns D0 state and the real power | |
246 | * state is D3. OS expects to set the device to D0 state. In | |
247 | * such case if OS uses the power state returned by the BIOS, | |
248 | * the device can't be transisted to the correct power state. | |
249 | * So if the acpi_power_nocheck is set, it is unnecessary to | |
250 | * get the power state by calling acpi_bus_get_power. | |
251 | */ | |
252 | acpi_bus_get_power(device->handle, &device->power.state); | |
253 | } | |
ec68373c | 254 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
255 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
256 | state)); | |
257 | return 0; | |
1da177e4 | 258 | } |
b1028c54 | 259 | |
1da177e4 | 260 | if (!device->power.states[state].flags.valid) { |
cece9296 | 261 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 262 | return -ENODEV; |
1da177e4 LT |
263 | } |
264 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 265 | printk(KERN_WARNING PREFIX |
a6fc6720 | 266 | "Cannot set device to a higher-powered" |
cece9296 | 267 | " state than parent\n"); |
d550d98d | 268 | return -ENODEV; |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Transition Power | |
273 | * ---------------- | |
274 | * On transitions to a high-powered state we first apply power (via | |
275 | * power resources) then evalute _PSx. Conversly for transitions to | |
276 | * a lower-powered state. | |
b913100d | 277 | */ |
1da177e4 LT |
278 | if (state < device->power.state) { |
279 | if (device->power.flags.power_resources) { | |
280 | result = acpi_power_transition(device, state); | |
281 | if (result) | |
282 | goto end; | |
283 | } | |
284 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
285 | status = acpi_evaluate_object(device->handle, |
286 | object_name, NULL, NULL); | |
1da177e4 LT |
287 | if (ACPI_FAILURE(status)) { |
288 | result = -ENODEV; | |
289 | goto end; | |
290 | } | |
291 | } | |
4be44fcd | 292 | } else { |
1da177e4 | 293 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
294 | status = acpi_evaluate_object(device->handle, |
295 | object_name, NULL, NULL); | |
1da177e4 LT |
296 | if (ACPI_FAILURE(status)) { |
297 | result = -ENODEV; | |
298 | goto end; | |
299 | } | |
300 | } | |
301 | if (device->power.flags.power_resources) { | |
302 | result = acpi_power_transition(device, state); | |
303 | if (result) | |
304 | goto end; | |
305 | } | |
306 | } | |
307 | ||
4be44fcd | 308 | end: |
1da177e4 | 309 | if (result) |
cece9296 | 310 | printk(KERN_WARNING PREFIX |
ddc50b6a | 311 | "Device [%s] failed to transition to D%d\n", |
cece9296 | 312 | device->pnp.bus_id, state); |
5e32132b SL |
313 | else { |
314 | device->power.state = state; | |
4be44fcd LB |
315 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
316 | "Device [%s] transitioned to D%d\n", | |
317 | device->pnp.bus_id, state)); | |
5e32132b | 318 | } |
1da177e4 | 319 | |
d550d98d | 320 | return result; |
1da177e4 | 321 | } |
1da177e4 | 322 | |
4be44fcd | 323 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 324 | |
3737b2b1 RW |
325 | bool acpi_bus_power_manageable(acpi_handle handle) |
326 | { | |
327 | struct acpi_device *device; | |
328 | int result; | |
329 | ||
330 | result = acpi_bus_get_device(handle, &device); | |
331 | return result ? false : device->flags.power_manageable; | |
332 | } | |
333 | ||
334 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
335 | ||
eb9d0fe4 RW |
336 | bool acpi_bus_can_wakeup(acpi_handle handle) |
337 | { | |
338 | struct acpi_device *device; | |
339 | int result; | |
340 | ||
341 | result = acpi_bus_get_device(handle, &device); | |
342 | return result ? false : device->wakeup.flags.valid; | |
343 | } | |
344 | ||
345 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
346 | ||
70023de8 SL |
347 | static void acpi_print_osc_error(acpi_handle handle, |
348 | struct acpi_osc_context *context, char *error) | |
349 | { | |
350 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
351 | int i; | |
352 | ||
353 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
354 | printk(KERN_DEBUG "%s\n", error); | |
355 | else { | |
356 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
357 | kfree(buffer.pointer); | |
358 | } | |
359 | printk(KERN_DEBUG"_OSC request data:"); | |
360 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
361 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
362 | printk("\n"); | |
363 | } | |
364 | ||
365 | static u8 hex_val(unsigned char c) | |
366 | { | |
367 | return isdigit(c) ? c - '0' : toupper(c) - 'A' + 10; | |
368 | } | |
369 | ||
370 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) | |
371 | { | |
372 | int i; | |
373 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
374 | 24, 26, 28, 30, 32, 34}; | |
375 | ||
376 | if (strlen(str) != 36) | |
377 | return AE_BAD_PARAMETER; | |
378 | for (i = 0; i < 36; i++) { | |
379 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
380 | if (str[i] != '-') | |
381 | return AE_BAD_PARAMETER; | |
382 | } else if (!isxdigit(str[i])) | |
383 | return AE_BAD_PARAMETER; | |
384 | } | |
385 | for (i = 0; i < 16; i++) { | |
386 | uuid[i] = hex_val(str[opc_map_to_uuid[i]]) << 4; | |
387 | uuid[i] |= hex_val(str[opc_map_to_uuid[i] + 1]); | |
388 | } | |
389 | return AE_OK; | |
390 | } | |
391 | ||
392 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
393 | { | |
394 | acpi_status status; | |
395 | struct acpi_object_list input; | |
396 | union acpi_object in_params[4]; | |
397 | union acpi_object *out_obj; | |
398 | u8 uuid[16]; | |
399 | u32 errors; | |
400 | ||
401 | if (!context) | |
402 | return AE_ERROR; | |
403 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
404 | return AE_ERROR; | |
405 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
406 | context->ret.pointer = NULL; | |
407 | ||
408 | /* Setting up input parameters */ | |
409 | input.count = 4; | |
410 | input.pointer = in_params; | |
411 | in_params[0].type = ACPI_TYPE_BUFFER; | |
412 | in_params[0].buffer.length = 16; | |
413 | in_params[0].buffer.pointer = uuid; | |
414 | in_params[1].type = ACPI_TYPE_INTEGER; | |
415 | in_params[1].integer.value = context->rev; | |
416 | in_params[2].type = ACPI_TYPE_INTEGER; | |
417 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
418 | in_params[3].type = ACPI_TYPE_BUFFER; | |
419 | in_params[3].buffer.length = context->cap.length; | |
420 | in_params[3].buffer.pointer = context->cap.pointer; | |
421 | ||
422 | status = acpi_evaluate_object(handle, "_OSC", &input, &context->ret); | |
423 | if (ACPI_FAILURE(status)) | |
424 | return status; | |
425 | ||
426 | /* return buffer should have the same length as cap buffer */ | |
427 | if (context->ret.length != context->cap.length) | |
428 | return AE_NULL_OBJECT; | |
429 | ||
430 | out_obj = context->ret.pointer; | |
431 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
432 | acpi_print_osc_error(handle, context, | |
433 | "_OSC evaluation returned wrong type"); | |
434 | status = AE_TYPE; | |
435 | goto out_kfree; | |
436 | } | |
437 | /* Need to ignore the bit0 in result code */ | |
438 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
439 | if (errors) { | |
440 | if (errors & OSC_REQUEST_ERROR) | |
441 | acpi_print_osc_error(handle, context, | |
442 | "_OSC request failed"); | |
443 | if (errors & OSC_INVALID_UUID_ERROR) | |
444 | acpi_print_osc_error(handle, context, | |
445 | "_OSC invalid UUID"); | |
446 | if (errors & OSC_INVALID_REVISION_ERROR) | |
447 | acpi_print_osc_error(handle, context, | |
448 | "_OSC invalid revision"); | |
449 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
450 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
451 | & OSC_QUERY_ENABLE) | |
452 | goto out_success; | |
453 | status = AE_SUPPORT; | |
454 | goto out_kfree; | |
455 | } | |
456 | status = AE_ERROR; | |
457 | goto out_kfree; | |
458 | } | |
459 | out_success: | |
460 | return AE_OK; | |
461 | ||
462 | out_kfree: | |
463 | kfree(context->ret.pointer); | |
464 | context->ret.pointer = NULL; | |
465 | return status; | |
466 | } | |
467 | EXPORT_SYMBOL(acpi_run_osc); | |
468 | ||
1da177e4 LT |
469 | /* -------------------------------------------------------------------------- |
470 | Event Management | |
471 | -------------------------------------------------------------------------- */ | |
472 | ||
14e04fb3 | 473 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
474 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
475 | ||
476 | LIST_HEAD(acpi_bus_event_list); | |
477 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
478 | ||
4be44fcd | 479 | extern int event_is_open; |
1da177e4 | 480 | |
8db85d4c | 481 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 482 | { |
8db85d4c | 483 | struct acpi_bus_event *event; |
4be44fcd | 484 | unsigned long flags = 0; |
1da177e4 | 485 | |
1da177e4 LT |
486 | /* drop event on the floor if no one's listening */ |
487 | if (!event_is_open) | |
d550d98d | 488 | return 0; |
1da177e4 LT |
489 | |
490 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
491 | if (!event) | |
d550d98d | 492 | return -ENOMEM; |
1da177e4 | 493 | |
8db85d4c AS |
494 | strcpy(event->device_class, device_class); |
495 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
496 | event->type = type; |
497 | event->data = data; | |
498 | ||
499 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
500 | list_add_tail(&event->node, &acpi_bus_event_list); | |
501 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
502 | ||
503 | wake_up_interruptible(&acpi_bus_event_queue); | |
504 | ||
d550d98d | 505 | return 0; |
8db85d4c AS |
506 | |
507 | } | |
508 | ||
509 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
510 | ||
511 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
512 | { | |
513 | if (!device) | |
514 | return -EINVAL; | |
515 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
516 | device->pnp.bus_id, type, data); | |
1da177e4 | 517 | } |
4be44fcd | 518 | |
14e04fb3 | 519 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 520 | |
4be44fcd | 521 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 522 | { |
4be44fcd LB |
523 | unsigned long flags = 0; |
524 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
525 | |
526 | DECLARE_WAITQUEUE(wait, current); | |
527 | ||
1da177e4 LT |
528 | |
529 | if (!event) | |
d550d98d | 530 | return -EINVAL; |
1da177e4 LT |
531 | |
532 | if (list_empty(&acpi_bus_event_list)) { | |
533 | ||
534 | set_current_state(TASK_INTERRUPTIBLE); | |
535 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
536 | ||
537 | if (list_empty(&acpi_bus_event_list)) | |
538 | schedule(); | |
539 | ||
540 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
541 | set_current_state(TASK_RUNNING); | |
542 | ||
543 | if (signal_pending(current)) | |
d550d98d | 544 | return -ERESTARTSYS; |
1da177e4 LT |
545 | } |
546 | ||
547 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
548 | if (!list_empty(&acpi_bus_event_list)) { |
549 | entry = list_entry(acpi_bus_event_list.next, | |
550 | struct acpi_bus_event, node); | |
1da177e4 | 551 | list_del(&entry->node); |
f0a37e00 | 552 | } |
1da177e4 LT |
553 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
554 | ||
555 | if (!entry) | |
d550d98d | 556 | return -ENODEV; |
1da177e4 LT |
557 | |
558 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
559 | ||
560 | kfree(entry); | |
561 | ||
d550d98d | 562 | return 0; |
1da177e4 | 563 | } |
1da177e4 | 564 | |
14e04fb3 | 565 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
566 | |
567 | /* -------------------------------------------------------------------------- | |
568 | Notification Handling | |
569 | -------------------------------------------------------------------------- */ | |
570 | ||
ff754e2e | 571 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 572 | { |
ff754e2e | 573 | struct acpi_device *device; |
cdd5b8ca | 574 | acpi_status status; |
1da177e4 LT |
575 | struct acpi_device_status old_status; |
576 | ||
ff754e2e BH |
577 | if (acpi_bus_get_device(handle, &device)) |
578 | return; | |
1da177e4 | 579 | if (!device) |
cdd5b8ca | 580 | return; |
1da177e4 | 581 | |
1da177e4 LT |
582 | old_status = device->status; |
583 | ||
584 | /* | |
585 | * Make sure this device's parent is present before we go about | |
586 | * messing with the device. | |
587 | */ | |
588 | if (device->parent && !device->parent->status.present) { | |
589 | device->status = device->parent->status; | |
cdd5b8ca | 590 | return; |
1da177e4 LT |
591 | } |
592 | ||
593 | status = acpi_bus_get_status(device); | |
594 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 595 | return; |
1da177e4 LT |
596 | |
597 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 598 | return; |
1da177e4 | 599 | |
1da177e4 LT |
600 | /* |
601 | * Device Insertion/Removal | |
602 | */ | |
603 | if ((device->status.present) && !(old_status.present)) { | |
604 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
605 | /* TBD: Handle device insertion */ | |
4be44fcd | 606 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
607 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
608 | /* TBD: Handle device removal */ | |
609 | } | |
1da177e4 LT |
610 | } |
611 | ||
ff754e2e | 612 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 613 | { |
1da177e4 | 614 | /* Status Change? */ |
ff754e2e | 615 | acpi_bus_check_device(handle); |
1da177e4 | 616 | |
1da177e4 LT |
617 | /* |
618 | * TBD: Enumerate child devices within this device's scope and | |
619 | * run acpi_bus_check_device()'s on them. | |
620 | */ | |
1da177e4 LT |
621 | } |
622 | ||
6bd00a61 SL |
623 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
624 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
625 | { | |
626 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
627 | } | |
628 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
629 | ||
630 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
631 | { | |
632 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
633 | } | |
634 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
635 | ||
1da177e4 LT |
636 | /** |
637 | * acpi_bus_notify | |
638 | * --------------- | |
639 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
640 | */ | |
4be44fcd | 641 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 642 | { |
4be44fcd | 643 | struct acpi_device *device = NULL; |
6d278131 | 644 | struct acpi_driver *driver; |
1da177e4 | 645 | |
02c37bd8 BH |
646 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
647 | type, handle)); | |
648 | ||
6bd00a61 SL |
649 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
650 | type, (void *)handle); | |
1da177e4 | 651 | |
1da177e4 LT |
652 | switch (type) { |
653 | ||
654 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 655 | acpi_bus_check_scope(handle); |
aafbcd16 | 656 | /* |
1da177e4 | 657 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 658 | * drivers via the device manager (device.c). |
1da177e4 LT |
659 | */ |
660 | break; | |
661 | ||
662 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 663 | acpi_bus_check_device(handle); |
aafbcd16 | 664 | /* |
1da177e4 | 665 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 666 | * drivers via the device manager (device.c). |
1da177e4 LT |
667 | */ |
668 | break; | |
669 | ||
670 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
671 | /* TBD */ |
672 | break; | |
673 | ||
674 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
675 | /* TBD */ |
676 | break; | |
677 | ||
678 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
679 | /* TBD: Exactly what does 'light' mean? */ |
680 | break; | |
681 | ||
682 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
683 | /* TBD */ |
684 | break; | |
685 | ||
686 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
687 | /* TBD */ |
688 | break; | |
689 | ||
690 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
691 | /* TBD */ |
692 | break; | |
693 | ||
694 | default: | |
4be44fcd LB |
695 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
696 | "Received unknown/unsupported notification [%08x]\n", | |
697 | type)); | |
1da177e4 LT |
698 | break; |
699 | } | |
700 | ||
ff754e2e BH |
701 | acpi_bus_get_device(handle, &device); |
702 | if (device) { | |
703 | driver = device->driver; | |
704 | if (driver && driver->ops.notify && | |
705 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
706 | driver->ops.notify(device, type); | |
707 | } | |
1da177e4 LT |
708 | } |
709 | ||
710 | /* -------------------------------------------------------------------------- | |
711 | Initialization/Cleanup | |
712 | -------------------------------------------------------------------------- */ | |
713 | ||
4be44fcd | 714 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 715 | { |
4be44fcd LB |
716 | acpi_status status = AE_OK; |
717 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
718 | struct acpi_object_list arg_list = { 1, &arg }; | |
719 | char *message = NULL; | |
1da177e4 | 720 | |
1da177e4 | 721 | |
aafbcd16 | 722 | /* |
1da177e4 LT |
723 | * Let the system know what interrupt model we are using by |
724 | * evaluating the \_PIC object, if exists. | |
725 | */ | |
726 | ||
727 | switch (acpi_irq_model) { | |
728 | case ACPI_IRQ_MODEL_PIC: | |
729 | message = "PIC"; | |
730 | break; | |
731 | case ACPI_IRQ_MODEL_IOAPIC: | |
732 | message = "IOAPIC"; | |
733 | break; | |
734 | case ACPI_IRQ_MODEL_IOSAPIC: | |
735 | message = "IOSAPIC"; | |
736 | break; | |
3948ec94 JK |
737 | case ACPI_IRQ_MODEL_PLATFORM: |
738 | message = "platform specific model"; | |
739 | break; | |
1da177e4 LT |
740 | default: |
741 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 742 | return -ENODEV; |
1da177e4 LT |
743 | } |
744 | ||
745 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
746 | ||
747 | arg.integer.value = acpi_irq_model; | |
748 | ||
749 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
750 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 751 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 752 | return -ENODEV; |
1da177e4 LT |
753 | } |
754 | ||
d550d98d | 755 | return 0; |
1da177e4 LT |
756 | } |
757 | ||
67a119f9 | 758 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
759 | |
760 | ||
4be44fcd | 761 | void __init acpi_early_init(void) |
1da177e4 | 762 | { |
4be44fcd | 763 | acpi_status status = AE_OK; |
1da177e4 LT |
764 | |
765 | if (acpi_disabled) | |
d550d98d | 766 | return; |
1da177e4 | 767 | |
61686124 BM |
768 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
769 | ||
1da177e4 LT |
770 | /* enable workarounds, unless strict ACPI spec. compliance */ |
771 | if (!acpi_strict) | |
772 | acpi_gbl_enable_interpreter_slack = TRUE; | |
773 | ||
ad71860a AS |
774 | acpi_gbl_permanent_mmap = 1; |
775 | ||
776 | status = acpi_reallocate_root_table(); | |
777 | if (ACPI_FAILURE(status)) { | |
778 | printk(KERN_ERR PREFIX | |
779 | "Unable to reallocate ACPI tables\n"); | |
780 | goto error0; | |
781 | } | |
782 | ||
1da177e4 LT |
783 | status = acpi_initialize_subsystem(); |
784 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
785 | printk(KERN_ERR PREFIX |
786 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
787 | goto error0; |
788 | } | |
789 | ||
790 | status = acpi_load_tables(); | |
791 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
792 | printk(KERN_ERR PREFIX |
793 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
794 | goto error0; |
795 | } | |
796 | ||
1da177e4 LT |
797 | #ifdef CONFIG_X86 |
798 | if (!acpi_ioapic) { | |
1da177e4 | 799 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
800 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
801 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
802 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
803 | } | |
1da177e4 | 804 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 805 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 806 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 807 | } else { |
1da177e4 | 808 | /* |
cee324b1 | 809 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
810 | * update it with result from INT_SRC_OVR parsing |
811 | */ | |
cee324b1 | 812 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
813 | } |
814 | #endif | |
815 | ||
4be44fcd LB |
816 | status = |
817 | acpi_enable_subsystem(~ | |
818 | (ACPI_NO_HARDWARE_INIT | | |
819 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
820 | if (ACPI_FAILURE(status)) { |
821 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
822 | goto error0; | |
823 | } | |
824 | ||
d550d98d | 825 | return; |
1da177e4 | 826 | |
4be44fcd | 827 | error0: |
1da177e4 | 828 | disable_acpi(); |
d550d98d | 829 | return; |
1da177e4 LT |
830 | } |
831 | ||
4be44fcd | 832 | static int __init acpi_bus_init(void) |
1da177e4 | 833 | { |
4be44fcd LB |
834 | int result = 0; |
835 | acpi_status status = AE_OK; | |
836 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 837 | |
176f9c18 | 838 | acpi_os_initialize1(); |
1da177e4 | 839 | |
4be44fcd LB |
840 | status = |
841 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 842 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
843 | printk(KERN_ERR PREFIX |
844 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
845 | goto error1; |
846 | } | |
847 | ||
1da177e4 LT |
848 | /* |
849 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
850 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
851 | * is called). | |
852 | * | |
aafbcd16 | 853 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
854 | * the EC parameters out of that. |
855 | */ | |
856 | status = acpi_ec_ecdt_probe(); | |
857 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
858 | |
859 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
860 | if (ACPI_FAILURE(status)) { | |
861 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
862 | goto error1; | |
863 | } | |
864 | ||
455c8793 ZY |
865 | /* |
866 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
867 | * is necessary to enable it as early as possible. | |
868 | */ | |
869 | acpi_boot_ec_enable(); | |
870 | ||
1da177e4 LT |
871 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
872 | ||
aafbcd16 AS |
873 | /* Initialize sleep structures */ |
874 | acpi_sleep_init(); | |
875 | ||
1da177e4 LT |
876 | /* |
877 | * Get the system interrupt model and evaluate \_PIC. | |
878 | */ | |
879 | result = acpi_bus_init_irq(); | |
880 | if (result) | |
881 | goto error1; | |
882 | ||
883 | /* | |
884 | * Register the for all standard device notifications. | |
885 | */ | |
4be44fcd LB |
886 | status = |
887 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
888 | &acpi_bus_notify, NULL); | |
1da177e4 | 889 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
890 | printk(KERN_ERR PREFIX |
891 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
892 | goto error1; |
893 | } | |
894 | ||
895 | /* | |
896 | * Create the top ACPI proc directory | |
897 | */ | |
898 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
899 | ||
d550d98d | 900 | return 0; |
1da177e4 LT |
901 | |
902 | /* Mimic structured exception handling */ | |
4be44fcd | 903 | error1: |
1da177e4 | 904 | acpi_terminate(); |
d550d98d | 905 | return -ENODEV; |
1da177e4 LT |
906 | } |
907 | ||
99e0d2fc | 908 | struct kobject *acpi_kobj; |
1da177e4 | 909 | |
4be44fcd | 910 | static int __init acpi_init(void) |
1da177e4 | 911 | { |
4be44fcd | 912 | int result = 0; |
1da177e4 | 913 | |
1da177e4 | 914 | |
1da177e4 LT |
915 | if (acpi_disabled) { |
916 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 917 | return -ENODEV; |
1da177e4 LT |
918 | } |
919 | ||
f62ed9e3 | 920 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 921 | if (!acpi_kobj) { |
96b2dd1f | 922 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
923 | acpi_kobj = NULL; |
924 | } | |
1da177e4 | 925 | |
0e46517d | 926 | init_acpi_device_notify(); |
1da177e4 LT |
927 | result = acpi_bus_init(); |
928 | ||
929 | if (!result) { | |
7752d5cf | 930 | pci_mmcfg_late_init(); |
9f9adecd LB |
931 | if (!(pm_flags & PM_APM)) |
932 | pm_flags |= PM_ACPI; | |
1da177e4 | 933 | else { |
4be44fcd LB |
934 | printk(KERN_INFO PREFIX |
935 | "APM is already active, exiting\n"); | |
1da177e4 LT |
936 | disable_acpi(); |
937 | result = -ENODEV; | |
938 | } | |
1da177e4 LT |
939 | } else |
940 | disable_acpi(); | |
81d0273d BH |
941 | |
942 | if (acpi_disabled) | |
943 | return result; | |
944 | ||
6415e12b ZY |
945 | /* |
946 | * If the laptop falls into the DMI check table, the power state check | |
947 | * will be disabled in the course of device power transistion. | |
948 | */ | |
949 | dmi_check_system(power_nocheck_dmi_table); | |
e747f274 BH |
950 | |
951 | acpi_scan_init(); | |
a5f820fe | 952 | acpi_ec_init(); |
44515374 | 953 | acpi_power_init(); |
141a0af3 | 954 | acpi_system_init(); |
84f810c3 | 955 | acpi_debug_init(); |
9cee43e0 | 956 | acpi_sleep_proc_init(); |
201b8c65 | 957 | acpi_wakeup_device_init(); |
d550d98d | 958 | return result; |
1da177e4 LT |
959 | } |
960 | ||
961 | subsys_initcall(acpi_init); |