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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 | */ | |
0c99c528 ZR |
193 | if (device->power.flags.power_resources) { |
194 | result = acpi_power_get_inferred_state(device); | |
195 | if (result) | |
196 | return result; | |
197 | } else if (device->power.flags.explicit_get) { | |
4be44fcd LB |
198 | status = acpi_evaluate_integer(device->handle, "_PSC", |
199 | NULL, &psc); | |
1da177e4 | 200 | if (ACPI_FAILURE(status)) |
d550d98d | 201 | return -ENODEV; |
4be44fcd | 202 | device->power.state = (int)psc; |
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; | |
9dc130fc | 400 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
401 | |
402 | if (!context) | |
403 | return AE_ERROR; | |
404 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
405 | return AE_ERROR; | |
406 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
407 | context->ret.pointer = NULL; | |
408 | ||
409 | /* Setting up input parameters */ | |
410 | input.count = 4; | |
411 | input.pointer = in_params; | |
412 | in_params[0].type = ACPI_TYPE_BUFFER; | |
413 | in_params[0].buffer.length = 16; | |
414 | in_params[0].buffer.pointer = uuid; | |
415 | in_params[1].type = ACPI_TYPE_INTEGER; | |
416 | in_params[1].integer.value = context->rev; | |
417 | in_params[2].type = ACPI_TYPE_INTEGER; | |
418 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
419 | in_params[3].type = ACPI_TYPE_BUFFER; | |
420 | in_params[3].buffer.length = context->cap.length; | |
421 | in_params[3].buffer.pointer = context->cap.pointer; | |
422 | ||
9dc130fc | 423 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
424 | if (ACPI_FAILURE(status)) |
425 | return status; | |
426 | ||
9dc130fc | 427 | if (!output.length) |
70023de8 SL |
428 | return AE_NULL_OBJECT; |
429 | ||
9dc130fc SL |
430 | out_obj = output.pointer; |
431 | if (out_obj->type != ACPI_TYPE_BUFFER | |
432 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
433 | acpi_print_osc_error(handle, context, |
434 | "_OSC evaluation returned wrong type"); | |
435 | status = AE_TYPE; | |
436 | goto out_kfree; | |
437 | } | |
438 | /* Need to ignore the bit0 in result code */ | |
439 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
440 | if (errors) { | |
441 | if (errors & OSC_REQUEST_ERROR) | |
442 | acpi_print_osc_error(handle, context, | |
443 | "_OSC request failed"); | |
444 | if (errors & OSC_INVALID_UUID_ERROR) | |
445 | acpi_print_osc_error(handle, context, | |
446 | "_OSC invalid UUID"); | |
447 | if (errors & OSC_INVALID_REVISION_ERROR) | |
448 | acpi_print_osc_error(handle, context, | |
449 | "_OSC invalid revision"); | |
450 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
451 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
452 | & OSC_QUERY_ENABLE) | |
453 | goto out_success; | |
454 | status = AE_SUPPORT; | |
455 | goto out_kfree; | |
456 | } | |
457 | status = AE_ERROR; | |
458 | goto out_kfree; | |
459 | } | |
460 | out_success: | |
9dc130fc SL |
461 | context->ret.length = out_obj->buffer.length; |
462 | context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); | |
463 | if (!context->ret.pointer) { | |
464 | status = AE_NO_MEMORY; | |
465 | goto out_kfree; | |
466 | } | |
467 | memcpy(context->ret.pointer, out_obj->buffer.pointer, | |
468 | context->ret.length); | |
469 | status = AE_OK; | |
70023de8 SL |
470 | |
471 | out_kfree: | |
9dc130fc SL |
472 | kfree(output.pointer); |
473 | if (status != AE_OK) | |
474 | context->ret.pointer = NULL; | |
70023de8 SL |
475 | return status; |
476 | } | |
477 | EXPORT_SYMBOL(acpi_run_osc); | |
478 | ||
3563ff96 SL |
479 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
480 | static void acpi_bus_osc_support(void) | |
481 | { | |
482 | u32 capbuf[2]; | |
483 | struct acpi_osc_context context = { | |
484 | .uuid_str = sb_uuid_str, | |
485 | .rev = 1, | |
486 | .cap.length = 8, | |
487 | .cap.pointer = capbuf, | |
488 | }; | |
489 | acpi_handle handle; | |
490 | ||
491 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
492 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
493 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
494 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
495 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
496 | #endif | |
6a4e2b75 ZY |
497 | |
498 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
499 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
500 | #endif | |
3563ff96 SL |
501 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
502 | return; | |
503 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) | |
504 | kfree(context.ret.pointer); | |
505 | /* do we need to check the returned cap? Sounds no */ | |
506 | } | |
507 | ||
1da177e4 LT |
508 | /* -------------------------------------------------------------------------- |
509 | Event Management | |
510 | -------------------------------------------------------------------------- */ | |
511 | ||
14e04fb3 | 512 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
513 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
514 | ||
515 | LIST_HEAD(acpi_bus_event_list); | |
516 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
517 | ||
4be44fcd | 518 | extern int event_is_open; |
1da177e4 | 519 | |
8db85d4c | 520 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 521 | { |
8db85d4c | 522 | struct acpi_bus_event *event; |
4be44fcd | 523 | unsigned long flags = 0; |
1da177e4 | 524 | |
1da177e4 LT |
525 | /* drop event on the floor if no one's listening */ |
526 | if (!event_is_open) | |
d550d98d | 527 | return 0; |
1da177e4 LT |
528 | |
529 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
530 | if (!event) | |
d550d98d | 531 | return -ENOMEM; |
1da177e4 | 532 | |
8db85d4c AS |
533 | strcpy(event->device_class, device_class); |
534 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
535 | event->type = type; |
536 | event->data = data; | |
537 | ||
538 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
539 | list_add_tail(&event->node, &acpi_bus_event_list); | |
540 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
541 | ||
542 | wake_up_interruptible(&acpi_bus_event_queue); | |
543 | ||
d550d98d | 544 | return 0; |
8db85d4c AS |
545 | |
546 | } | |
547 | ||
548 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
549 | ||
550 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
551 | { | |
552 | if (!device) | |
553 | return -EINVAL; | |
554 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
555 | device->pnp.bus_id, type, data); | |
1da177e4 | 556 | } |
4be44fcd | 557 | |
14e04fb3 | 558 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 559 | |
4be44fcd | 560 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 561 | { |
4be44fcd LB |
562 | unsigned long flags = 0; |
563 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
564 | |
565 | DECLARE_WAITQUEUE(wait, current); | |
566 | ||
1da177e4 LT |
567 | |
568 | if (!event) | |
d550d98d | 569 | return -EINVAL; |
1da177e4 LT |
570 | |
571 | if (list_empty(&acpi_bus_event_list)) { | |
572 | ||
573 | set_current_state(TASK_INTERRUPTIBLE); | |
574 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
575 | ||
576 | if (list_empty(&acpi_bus_event_list)) | |
577 | schedule(); | |
578 | ||
579 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
580 | set_current_state(TASK_RUNNING); | |
581 | ||
582 | if (signal_pending(current)) | |
d550d98d | 583 | return -ERESTARTSYS; |
1da177e4 LT |
584 | } |
585 | ||
586 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
587 | if (!list_empty(&acpi_bus_event_list)) { |
588 | entry = list_entry(acpi_bus_event_list.next, | |
589 | struct acpi_bus_event, node); | |
1da177e4 | 590 | list_del(&entry->node); |
f0a37e00 | 591 | } |
1da177e4 LT |
592 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
593 | ||
594 | if (!entry) | |
d550d98d | 595 | return -ENODEV; |
1da177e4 LT |
596 | |
597 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
598 | ||
599 | kfree(entry); | |
600 | ||
d550d98d | 601 | return 0; |
1da177e4 | 602 | } |
1da177e4 | 603 | |
14e04fb3 | 604 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
605 | |
606 | /* -------------------------------------------------------------------------- | |
607 | Notification Handling | |
608 | -------------------------------------------------------------------------- */ | |
609 | ||
ff754e2e | 610 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 611 | { |
ff754e2e | 612 | struct acpi_device *device; |
cdd5b8ca | 613 | acpi_status status; |
1da177e4 LT |
614 | struct acpi_device_status old_status; |
615 | ||
ff754e2e BH |
616 | if (acpi_bus_get_device(handle, &device)) |
617 | return; | |
1da177e4 | 618 | if (!device) |
cdd5b8ca | 619 | return; |
1da177e4 | 620 | |
1da177e4 LT |
621 | old_status = device->status; |
622 | ||
623 | /* | |
624 | * Make sure this device's parent is present before we go about | |
625 | * messing with the device. | |
626 | */ | |
627 | if (device->parent && !device->parent->status.present) { | |
628 | device->status = device->parent->status; | |
cdd5b8ca | 629 | return; |
1da177e4 LT |
630 | } |
631 | ||
632 | status = acpi_bus_get_status(device); | |
633 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 634 | return; |
1da177e4 LT |
635 | |
636 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 637 | return; |
1da177e4 | 638 | |
1da177e4 LT |
639 | /* |
640 | * Device Insertion/Removal | |
641 | */ | |
642 | if ((device->status.present) && !(old_status.present)) { | |
643 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
644 | /* TBD: Handle device insertion */ | |
4be44fcd | 645 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
646 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
647 | /* TBD: Handle device removal */ | |
648 | } | |
1da177e4 LT |
649 | } |
650 | ||
ff754e2e | 651 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 652 | { |
1da177e4 | 653 | /* Status Change? */ |
ff754e2e | 654 | acpi_bus_check_device(handle); |
1da177e4 | 655 | |
1da177e4 LT |
656 | /* |
657 | * TBD: Enumerate child devices within this device's scope and | |
658 | * run acpi_bus_check_device()'s on them. | |
659 | */ | |
1da177e4 LT |
660 | } |
661 | ||
6bd00a61 SL |
662 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
663 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
664 | { | |
665 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
666 | } | |
667 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
668 | ||
669 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
670 | { | |
671 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
672 | } | |
673 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
674 | ||
1da177e4 LT |
675 | /** |
676 | * acpi_bus_notify | |
677 | * --------------- | |
678 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
679 | */ | |
4be44fcd | 680 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 681 | { |
4be44fcd | 682 | struct acpi_device *device = NULL; |
6d278131 | 683 | struct acpi_driver *driver; |
1da177e4 | 684 | |
02c37bd8 BH |
685 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
686 | type, handle)); | |
687 | ||
6bd00a61 SL |
688 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
689 | type, (void *)handle); | |
1da177e4 | 690 | |
1da177e4 LT |
691 | switch (type) { |
692 | ||
693 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 694 | acpi_bus_check_scope(handle); |
aafbcd16 | 695 | /* |
1da177e4 | 696 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 697 | * drivers via the device manager (device.c). |
1da177e4 LT |
698 | */ |
699 | break; | |
700 | ||
701 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 702 | acpi_bus_check_device(handle); |
aafbcd16 | 703 | /* |
1da177e4 | 704 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 705 | * drivers via the device manager (device.c). |
1da177e4 LT |
706 | */ |
707 | break; | |
708 | ||
709 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
710 | /* TBD */ |
711 | break; | |
712 | ||
713 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
714 | /* TBD */ |
715 | break; | |
716 | ||
717 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
718 | /* TBD: Exactly what does 'light' mean? */ |
719 | break; | |
720 | ||
721 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
722 | /* TBD */ |
723 | break; | |
724 | ||
725 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
726 | /* TBD */ |
727 | break; | |
728 | ||
729 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
730 | /* TBD */ |
731 | break; | |
732 | ||
733 | default: | |
4be44fcd LB |
734 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
735 | "Received unknown/unsupported notification [%08x]\n", | |
736 | type)); | |
1da177e4 LT |
737 | break; |
738 | } | |
739 | ||
ff754e2e BH |
740 | acpi_bus_get_device(handle, &device); |
741 | if (device) { | |
742 | driver = device->driver; | |
743 | if (driver && driver->ops.notify && | |
744 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
745 | driver->ops.notify(device, type); | |
746 | } | |
1da177e4 LT |
747 | } |
748 | ||
749 | /* -------------------------------------------------------------------------- | |
750 | Initialization/Cleanup | |
751 | -------------------------------------------------------------------------- */ | |
752 | ||
4be44fcd | 753 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 754 | { |
4be44fcd LB |
755 | acpi_status status = AE_OK; |
756 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
757 | struct acpi_object_list arg_list = { 1, &arg }; | |
758 | char *message = NULL; | |
1da177e4 | 759 | |
1da177e4 | 760 | |
aafbcd16 | 761 | /* |
1da177e4 LT |
762 | * Let the system know what interrupt model we are using by |
763 | * evaluating the \_PIC object, if exists. | |
764 | */ | |
765 | ||
766 | switch (acpi_irq_model) { | |
767 | case ACPI_IRQ_MODEL_PIC: | |
768 | message = "PIC"; | |
769 | break; | |
770 | case ACPI_IRQ_MODEL_IOAPIC: | |
771 | message = "IOAPIC"; | |
772 | break; | |
773 | case ACPI_IRQ_MODEL_IOSAPIC: | |
774 | message = "IOSAPIC"; | |
775 | break; | |
3948ec94 JK |
776 | case ACPI_IRQ_MODEL_PLATFORM: |
777 | message = "platform specific model"; | |
778 | break; | |
1da177e4 LT |
779 | default: |
780 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 781 | return -ENODEV; |
1da177e4 LT |
782 | } |
783 | ||
784 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
785 | ||
786 | arg.integer.value = acpi_irq_model; | |
787 | ||
788 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
789 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 790 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 791 | return -ENODEV; |
1da177e4 LT |
792 | } |
793 | ||
d550d98d | 794 | return 0; |
1da177e4 LT |
795 | } |
796 | ||
67a119f9 | 797 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
798 | |
799 | ||
4be44fcd | 800 | void __init acpi_early_init(void) |
1da177e4 | 801 | { |
4be44fcd | 802 | acpi_status status = AE_OK; |
1da177e4 LT |
803 | |
804 | if (acpi_disabled) | |
d550d98d | 805 | return; |
1da177e4 | 806 | |
61686124 BM |
807 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
808 | ||
1da177e4 LT |
809 | /* enable workarounds, unless strict ACPI spec. compliance */ |
810 | if (!acpi_strict) | |
811 | acpi_gbl_enable_interpreter_slack = TRUE; | |
812 | ||
ad71860a AS |
813 | acpi_gbl_permanent_mmap = 1; |
814 | ||
815 | status = acpi_reallocate_root_table(); | |
816 | if (ACPI_FAILURE(status)) { | |
817 | printk(KERN_ERR PREFIX | |
818 | "Unable to reallocate ACPI tables\n"); | |
819 | goto error0; | |
820 | } | |
821 | ||
1da177e4 LT |
822 | status = acpi_initialize_subsystem(); |
823 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
824 | printk(KERN_ERR PREFIX |
825 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
826 | goto error0; |
827 | } | |
828 | ||
829 | status = acpi_load_tables(); | |
830 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
831 | printk(KERN_ERR PREFIX |
832 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
833 | goto error0; |
834 | } | |
835 | ||
1da177e4 LT |
836 | #ifdef CONFIG_X86 |
837 | if (!acpi_ioapic) { | |
1da177e4 | 838 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
839 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
840 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
841 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
842 | } | |
1da177e4 | 843 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 844 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 845 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 846 | } else { |
1da177e4 | 847 | /* |
cee324b1 | 848 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
849 | * update it with result from INT_SRC_OVR parsing |
850 | */ | |
cee324b1 | 851 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
852 | } |
853 | #endif | |
854 | ||
4be44fcd LB |
855 | status = |
856 | acpi_enable_subsystem(~ | |
857 | (ACPI_NO_HARDWARE_INIT | | |
858 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
859 | if (ACPI_FAILURE(status)) { |
860 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
861 | goto error0; | |
862 | } | |
863 | ||
d550d98d | 864 | return; |
1da177e4 | 865 | |
4be44fcd | 866 | error0: |
1da177e4 | 867 | disable_acpi(); |
d550d98d | 868 | return; |
1da177e4 LT |
869 | } |
870 | ||
4be44fcd | 871 | static int __init acpi_bus_init(void) |
1da177e4 | 872 | { |
4be44fcd LB |
873 | int result = 0; |
874 | acpi_status status = AE_OK; | |
875 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 876 | |
176f9c18 | 877 | acpi_os_initialize1(); |
1da177e4 | 878 | |
4be44fcd LB |
879 | status = |
880 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 881 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
882 | printk(KERN_ERR PREFIX |
883 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
884 | goto error1; |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* |
888 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
889 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
890 | * is called). | |
891 | * | |
aafbcd16 | 892 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
893 | * the EC parameters out of that. |
894 | */ | |
895 | status = acpi_ec_ecdt_probe(); | |
896 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 897 | |
3563ff96 SL |
898 | acpi_bus_osc_support(); |
899 | ||
1da177e4 LT |
900 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
901 | if (ACPI_FAILURE(status)) { | |
902 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
903 | goto error1; | |
904 | } | |
905 | ||
78f16996 AC |
906 | acpi_early_processor_set_pdc(); |
907 | ||
455c8793 ZY |
908 | /* |
909 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
910 | * is necessary to enable it as early as possible. | |
911 | */ | |
912 | acpi_boot_ec_enable(); | |
913 | ||
1da177e4 LT |
914 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
915 | ||
aafbcd16 AS |
916 | /* Initialize sleep structures */ |
917 | acpi_sleep_init(); | |
918 | ||
1da177e4 LT |
919 | /* |
920 | * Get the system interrupt model and evaluate \_PIC. | |
921 | */ | |
922 | result = acpi_bus_init_irq(); | |
923 | if (result) | |
924 | goto error1; | |
925 | ||
926 | /* | |
927 | * Register the for all standard device notifications. | |
928 | */ | |
4be44fcd LB |
929 | status = |
930 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
931 | &acpi_bus_notify, NULL); | |
1da177e4 | 932 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
933 | printk(KERN_ERR PREFIX |
934 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
935 | goto error1; |
936 | } | |
937 | ||
938 | /* | |
939 | * Create the top ACPI proc directory | |
940 | */ | |
941 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
942 | ||
d550d98d | 943 | return 0; |
1da177e4 LT |
944 | |
945 | /* Mimic structured exception handling */ | |
4be44fcd | 946 | error1: |
1da177e4 | 947 | acpi_terminate(); |
d550d98d | 948 | return -ENODEV; |
1da177e4 LT |
949 | } |
950 | ||
99e0d2fc | 951 | struct kobject *acpi_kobj; |
1da177e4 | 952 | |
4be44fcd | 953 | static int __init acpi_init(void) |
1da177e4 | 954 | { |
4be44fcd | 955 | int result = 0; |
1da177e4 | 956 | |
1da177e4 | 957 | |
1da177e4 LT |
958 | if (acpi_disabled) { |
959 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 960 | return -ENODEV; |
1da177e4 LT |
961 | } |
962 | ||
f62ed9e3 | 963 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 964 | if (!acpi_kobj) { |
96b2dd1f | 965 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
966 | acpi_kobj = NULL; |
967 | } | |
1da177e4 | 968 | |
0e46517d | 969 | init_acpi_device_notify(); |
1da177e4 LT |
970 | result = acpi_bus_init(); |
971 | ||
972 | if (!result) { | |
7752d5cf | 973 | pci_mmcfg_late_init(); |
9f9adecd LB |
974 | if (!(pm_flags & PM_APM)) |
975 | pm_flags |= PM_ACPI; | |
1da177e4 | 976 | else { |
4be44fcd LB |
977 | printk(KERN_INFO PREFIX |
978 | "APM is already active, exiting\n"); | |
1da177e4 LT |
979 | disable_acpi(); |
980 | result = -ENODEV; | |
981 | } | |
1da177e4 LT |
982 | } else |
983 | disable_acpi(); | |
81d0273d BH |
984 | |
985 | if (acpi_disabled) | |
986 | return result; | |
987 | ||
6415e12b ZY |
988 | /* |
989 | * If the laptop falls into the DMI check table, the power state check | |
990 | * will be disabled in the course of device power transistion. | |
991 | */ | |
992 | dmi_check_system(power_nocheck_dmi_table); | |
e747f274 BH |
993 | |
994 | acpi_scan_init(); | |
a5f820fe | 995 | acpi_ec_init(); |
44515374 | 996 | acpi_power_init(); |
141a0af3 | 997 | acpi_system_init(); |
84f810c3 | 998 | acpi_debug_init(); |
9cee43e0 | 999 | acpi_sleep_proc_init(); |
201b8c65 | 1000 | acpi_wakeup_device_init(); |
d550d98d | 1001 | return result; |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | subsys_initcall(acpi_init); |