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