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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> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
7752d5cf | 39 | #include <linux/pci.h> |
1da177e4 LT |
40 | #include <acpi/acpi_bus.h> |
41 | #include <acpi/acpi_drivers.h> | |
eb27cae8 | 42 | #include <linux/dmi.h> |
1da177e4 | 43 | |
e60cc7a6 BH |
44 | #include "internal.h" |
45 | ||
1da177e4 | 46 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 47 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 48 | |
4be44fcd LB |
49 | struct acpi_device *acpi_root; |
50 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
51 | EXPORT_SYMBOL(acpi_root_dir); |
52 | ||
53 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
54 | ||
6415e12b ZY |
55 | static int set_power_nocheck(const struct dmi_system_id *id) |
56 | { | |
57 | printk(KERN_NOTICE PREFIX "%s detected - " | |
58 | "disable power check in power transistion\n", id->ident); | |
59 | acpi_power_nocheck = 1; | |
60 | return 0; | |
61 | } | |
62 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { | |
63 | { | |
64 | set_power_nocheck, "HP Pavilion 05", { | |
65 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
66 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), | |
67 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, | |
68 | {}, | |
69 | }; | |
70 | ||
71 | ||
1da177e4 LT |
72 | /* -------------------------------------------------------------------------- |
73 | Device Management | |
74 | -------------------------------------------------------------------------- */ | |
75 | ||
4be44fcd | 76 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 77 | { |
4be44fcd | 78 | acpi_status status = AE_OK; |
1da177e4 | 79 | |
1da177e4 LT |
80 | |
81 | if (!device) | |
d550d98d | 82 | return -EINVAL; |
1da177e4 LT |
83 | |
84 | /* TBD: Support fixed-feature devices */ | |
85 | ||
4be44fcd | 86 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 87 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
88 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
89 | handle)); | |
d550d98d | 90 | return -ENODEV; |
1da177e4 LT |
91 | } |
92 | ||
d550d98d | 93 | return 0; |
1da177e4 | 94 | } |
4be44fcd | 95 | |
1da177e4 LT |
96 | EXPORT_SYMBOL(acpi_bus_get_device); |
97 | ||
402ac536 BH |
98 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
99 | unsigned long long *sta) | |
1da177e4 | 100 | { |
402ac536 | 101 | acpi_status status; |
4be44fcd | 102 | |
402ac536 BH |
103 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
104 | if (ACPI_SUCCESS(status)) | |
105 | return AE_OK; | |
1da177e4 | 106 | |
402ac536 BH |
107 | if (status == AE_NOT_FOUND) { |
108 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
109 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
110 | return AE_OK; | |
1da177e4 | 111 | } |
402ac536 BH |
112 | return status; |
113 | } | |
1da177e4 | 114 | |
402ac536 BH |
115 | int acpi_bus_get_status(struct acpi_device *device) |
116 | { | |
117 | acpi_status status; | |
118 | unsigned long long sta; | |
119 | ||
120 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
121 | if (ACPI_FAILURE(status)) | |
122 | return -ENODEV; | |
123 | ||
124 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
125 | |
126 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
127 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
128 | "functional but not present;\n", | |
129 | device->pnp.bus_id, | |
130 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
131 | } |
132 | ||
4be44fcd LB |
133 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
134 | device->pnp.bus_id, | |
135 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 136 | return 0; |
1da177e4 | 137 | } |
4be44fcd | 138 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 139 | |
20733939 | 140 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 141 | void *context) |
20733939 ZR |
142 | { |
143 | return; | |
144 | } | |
145 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
146 | ||
147 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
148 | { | |
149 | acpi_status status = AE_OK; | |
150 | ||
151 | if (!*data) | |
152 | return -EINVAL; | |
153 | ||
154 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
155 | if (ACPI_FAILURE(status) || !*data) { | |
156 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
157 | handle)); | |
158 | return -ENODEV; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
164 | ||
1da177e4 LT |
165 | /* -------------------------------------------------------------------------- |
166 | Power Management | |
167 | -------------------------------------------------------------------------- */ | |
168 | ||
4be44fcd | 169 | int acpi_bus_get_power(acpi_handle handle, int *state) |
1da177e4 | 170 | { |
4be44fcd LB |
171 | int result = 0; |
172 | acpi_status status = 0; | |
173 | struct acpi_device *device = NULL; | |
27663c58 | 174 | unsigned long long psc = 0; |
1da177e4 | 175 | |
1da177e4 LT |
176 | |
177 | result = acpi_bus_get_device(handle, &device); | |
178 | if (result) | |
d550d98d | 179 | return result; |
1da177e4 LT |
180 | |
181 | *state = ACPI_STATE_UNKNOWN; | |
182 | ||
183 | if (!device->flags.power_manageable) { | |
184 | /* TBD: Non-recursive algorithm for walking up hierarchy */ | |
185 | if (device->parent) | |
186 | *state = device->parent->power.state; | |
187 | else | |
188 | *state = ACPI_STATE_D0; | |
4be44fcd | 189 | } else { |
1da177e4 | 190 | /* |
aafbcd16 | 191 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
192 | * indirectly (via power resources). |
193 | */ | |
0c99c528 ZR |
194 | if (device->power.flags.power_resources) { |
195 | result = acpi_power_get_inferred_state(device); | |
196 | if (result) | |
197 | return result; | |
198 | } else if (device->power.flags.explicit_get) { | |
4be44fcd LB |
199 | status = acpi_evaluate_integer(device->handle, "_PSC", |
200 | NULL, &psc); | |
1da177e4 | 201 | if (ACPI_FAILURE(status)) |
d550d98d | 202 | return -ENODEV; |
4be44fcd | 203 | device->power.state = (int)psc; |
1da177e4 LT |
204 | } |
205 | ||
206 | *state = device->power.state; | |
207 | } | |
208 | ||
209 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
4be44fcd | 210 | device->pnp.bus_id, device->power.state)); |
1da177e4 | 211 | |
d550d98d | 212 | return 0; |
1da177e4 | 213 | } |
1da177e4 | 214 | |
4be44fcd | 215 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 216 | |
4be44fcd | 217 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 218 | { |
4be44fcd LB |
219 | int result = 0; |
220 | acpi_status status = AE_OK; | |
221 | struct acpi_device *device = NULL; | |
222 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 223 | |
1da177e4 LT |
224 | |
225 | result = acpi_bus_get_device(handle, &device); | |
226 | if (result) | |
d550d98d | 227 | return result; |
1da177e4 LT |
228 | |
229 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 230 | return -EINVAL; |
1da177e4 LT |
231 | |
232 | /* Make sure this is a valid target state */ | |
233 | ||
234 | if (!device->flags.power_manageable) { | |
9805cb76 | 235 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 236 | kobject_name(&device->dev.kobj))); |
d550d98d | 237 | return -ENODEV; |
1da177e4 | 238 | } |
b913100d | 239 | /* |
c35923bc | 240 | * Get device's current power state |
b913100d | 241 | */ |
f5adfaa3 ZY |
242 | if (!acpi_power_nocheck) { |
243 | /* | |
244 | * Maybe the incorrect power state is returned on the bogus | |
245 | * bios, which is different with the real power state. | |
246 | * For example: the bios returns D0 state and the real power | |
247 | * state is D3. OS expects to set the device to D0 state. In | |
248 | * such case if OS uses the power state returned by the BIOS, | |
249 | * the device can't be transisted to the correct power state. | |
250 | * So if the acpi_power_nocheck is set, it is unnecessary to | |
251 | * get the power state by calling acpi_bus_get_power. | |
252 | */ | |
253 | acpi_bus_get_power(device->handle, &device->power.state); | |
254 | } | |
ec68373c | 255 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
256 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
257 | state)); | |
258 | return 0; | |
1da177e4 | 259 | } |
b1028c54 | 260 | |
1da177e4 | 261 | if (!device->power.states[state].flags.valid) { |
cece9296 | 262 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 263 | return -ENODEV; |
1da177e4 LT |
264 | } |
265 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 266 | printk(KERN_WARNING PREFIX |
a6fc6720 | 267 | "Cannot set device to a higher-powered" |
cece9296 | 268 | " state than parent\n"); |
d550d98d | 269 | return -ENODEV; |
1da177e4 LT |
270 | } |
271 | ||
272 | /* | |
273 | * Transition Power | |
274 | * ---------------- | |
275 | * On transitions to a high-powered state we first apply power (via | |
276 | * power resources) then evalute _PSx. Conversly for transitions to | |
277 | * a lower-powered state. | |
b913100d | 278 | */ |
1da177e4 LT |
279 | if (state < device->power.state) { |
280 | if (device->power.flags.power_resources) { | |
281 | result = acpi_power_transition(device, state); | |
282 | if (result) | |
283 | goto end; | |
284 | } | |
285 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
286 | status = acpi_evaluate_object(device->handle, |
287 | object_name, NULL, NULL); | |
1da177e4 LT |
288 | if (ACPI_FAILURE(status)) { |
289 | result = -ENODEV; | |
290 | goto end; | |
291 | } | |
292 | } | |
4be44fcd | 293 | } else { |
1da177e4 | 294 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
295 | status = acpi_evaluate_object(device->handle, |
296 | object_name, NULL, NULL); | |
1da177e4 LT |
297 | if (ACPI_FAILURE(status)) { |
298 | result = -ENODEV; | |
299 | goto end; | |
300 | } | |
301 | } | |
302 | if (device->power.flags.power_resources) { | |
303 | result = acpi_power_transition(device, state); | |
304 | if (result) | |
305 | goto end; | |
306 | } | |
307 | } | |
308 | ||
4be44fcd | 309 | end: |
1da177e4 | 310 | if (result) |
cece9296 | 311 | printk(KERN_WARNING PREFIX |
ddc50b6a | 312 | "Device [%s] failed to transition to D%d\n", |
cece9296 | 313 | device->pnp.bus_id, state); |
5e32132b SL |
314 | else { |
315 | device->power.state = state; | |
4be44fcd LB |
316 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
317 | "Device [%s] transitioned to D%d\n", | |
318 | device->pnp.bus_id, state)); | |
5e32132b | 319 | } |
1da177e4 | 320 | |
d550d98d | 321 | return result; |
1da177e4 | 322 | } |
1da177e4 | 323 | |
4be44fcd | 324 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 325 | |
3737b2b1 RW |
326 | bool acpi_bus_power_manageable(acpi_handle handle) |
327 | { | |
328 | struct acpi_device *device; | |
329 | int result; | |
330 | ||
331 | result = acpi_bus_get_device(handle, &device); | |
332 | return result ? false : device->flags.power_manageable; | |
333 | } | |
334 | ||
335 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
336 | ||
eb9d0fe4 RW |
337 | bool acpi_bus_can_wakeup(acpi_handle handle) |
338 | { | |
339 | struct acpi_device *device; | |
340 | int result; | |
341 | ||
342 | result = acpi_bus_get_device(handle, &device); | |
343 | return result ? false : device->wakeup.flags.valid; | |
344 | } | |
345 | ||
346 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
347 | ||
70023de8 SL |
348 | static void acpi_print_osc_error(acpi_handle handle, |
349 | struct acpi_osc_context *context, char *error) | |
350 | { | |
351 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
352 | int i; | |
353 | ||
354 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
355 | printk(KERN_DEBUG "%s\n", error); | |
356 | else { | |
357 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
358 | kfree(buffer.pointer); | |
359 | } | |
360 | printk(KERN_DEBUG"_OSC request data:"); | |
361 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
362 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
363 | printk("\n"); | |
364 | } | |
365 | ||
366 | static u8 hex_val(unsigned char c) | |
367 | { | |
368 | return isdigit(c) ? c - '0' : toupper(c) - 'A' + 10; | |
369 | } | |
370 | ||
371 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) | |
372 | { | |
373 | int i; | |
374 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
375 | 24, 26, 28, 30, 32, 34}; | |
376 | ||
377 | if (strlen(str) != 36) | |
378 | return AE_BAD_PARAMETER; | |
379 | for (i = 0; i < 36; i++) { | |
380 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
381 | if (str[i] != '-') | |
382 | return AE_BAD_PARAMETER; | |
383 | } else if (!isxdigit(str[i])) | |
384 | return AE_BAD_PARAMETER; | |
385 | } | |
386 | for (i = 0; i < 16; i++) { | |
387 | uuid[i] = hex_val(str[opc_map_to_uuid[i]]) << 4; | |
388 | uuid[i] |= hex_val(str[opc_map_to_uuid[i] + 1]); | |
389 | } | |
390 | return AE_OK; | |
391 | } | |
392 | ||
393 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
394 | { | |
395 | acpi_status status; | |
396 | struct acpi_object_list input; | |
397 | union acpi_object in_params[4]; | |
398 | union acpi_object *out_obj; | |
399 | u8 uuid[16]; | |
400 | u32 errors; | |
9dc130fc | 401 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
402 | |
403 | if (!context) | |
404 | return AE_ERROR; | |
405 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
406 | return AE_ERROR; | |
407 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
408 | context->ret.pointer = NULL; | |
409 | ||
410 | /* Setting up input parameters */ | |
411 | input.count = 4; | |
412 | input.pointer = in_params; | |
413 | in_params[0].type = ACPI_TYPE_BUFFER; | |
414 | in_params[0].buffer.length = 16; | |
415 | in_params[0].buffer.pointer = uuid; | |
416 | in_params[1].type = ACPI_TYPE_INTEGER; | |
417 | in_params[1].integer.value = context->rev; | |
418 | in_params[2].type = ACPI_TYPE_INTEGER; | |
419 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
420 | in_params[3].type = ACPI_TYPE_BUFFER; | |
421 | in_params[3].buffer.length = context->cap.length; | |
422 | in_params[3].buffer.pointer = context->cap.pointer; | |
423 | ||
9dc130fc | 424 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
425 | if (ACPI_FAILURE(status)) |
426 | return status; | |
427 | ||
9dc130fc | 428 | if (!output.length) |
70023de8 SL |
429 | return AE_NULL_OBJECT; |
430 | ||
9dc130fc SL |
431 | out_obj = output.pointer; |
432 | if (out_obj->type != ACPI_TYPE_BUFFER | |
433 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
434 | acpi_print_osc_error(handle, context, |
435 | "_OSC evaluation returned wrong type"); | |
436 | status = AE_TYPE; | |
437 | goto out_kfree; | |
438 | } | |
439 | /* Need to ignore the bit0 in result code */ | |
440 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
441 | if (errors) { | |
442 | if (errors & OSC_REQUEST_ERROR) | |
443 | acpi_print_osc_error(handle, context, | |
444 | "_OSC request failed"); | |
445 | if (errors & OSC_INVALID_UUID_ERROR) | |
446 | acpi_print_osc_error(handle, context, | |
447 | "_OSC invalid UUID"); | |
448 | if (errors & OSC_INVALID_REVISION_ERROR) | |
449 | acpi_print_osc_error(handle, context, | |
450 | "_OSC invalid revision"); | |
451 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
452 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
453 | & OSC_QUERY_ENABLE) | |
454 | goto out_success; | |
455 | status = AE_SUPPORT; | |
456 | goto out_kfree; | |
457 | } | |
458 | status = AE_ERROR; | |
459 | goto out_kfree; | |
460 | } | |
461 | out_success: | |
9dc130fc SL |
462 | context->ret.length = out_obj->buffer.length; |
463 | context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); | |
464 | if (!context->ret.pointer) { | |
465 | status = AE_NO_MEMORY; | |
466 | goto out_kfree; | |
467 | } | |
468 | memcpy(context->ret.pointer, out_obj->buffer.pointer, | |
469 | context->ret.length); | |
470 | status = AE_OK; | |
70023de8 SL |
471 | |
472 | out_kfree: | |
9dc130fc SL |
473 | kfree(output.pointer); |
474 | if (status != AE_OK) | |
475 | context->ret.pointer = NULL; | |
70023de8 SL |
476 | return status; |
477 | } | |
478 | EXPORT_SYMBOL(acpi_run_osc); | |
479 | ||
3563ff96 SL |
480 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
481 | static void acpi_bus_osc_support(void) | |
482 | { | |
483 | u32 capbuf[2]; | |
484 | struct acpi_osc_context context = { | |
485 | .uuid_str = sb_uuid_str, | |
486 | .rev = 1, | |
487 | .cap.length = 8, | |
488 | .cap.pointer = capbuf, | |
489 | }; | |
490 | acpi_handle handle; | |
491 | ||
492 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
493 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
494 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
495 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
496 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
497 | #endif | |
6a4e2b75 ZY |
498 | |
499 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
500 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
501 | #endif | |
3563ff96 SL |
502 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
503 | return; | |
504 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) | |
505 | kfree(context.ret.pointer); | |
506 | /* do we need to check the returned cap? Sounds no */ | |
507 | } | |
508 | ||
1da177e4 LT |
509 | /* -------------------------------------------------------------------------- |
510 | Event Management | |
511 | -------------------------------------------------------------------------- */ | |
512 | ||
14e04fb3 | 513 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
514 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
515 | ||
516 | LIST_HEAD(acpi_bus_event_list); | |
517 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
518 | ||
4be44fcd | 519 | extern int event_is_open; |
1da177e4 | 520 | |
8db85d4c | 521 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 522 | { |
8db85d4c | 523 | struct acpi_bus_event *event; |
4be44fcd | 524 | unsigned long flags = 0; |
1da177e4 | 525 | |
1da177e4 LT |
526 | /* drop event on the floor if no one's listening */ |
527 | if (!event_is_open) | |
d550d98d | 528 | return 0; |
1da177e4 LT |
529 | |
530 | event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); | |
531 | if (!event) | |
d550d98d | 532 | return -ENOMEM; |
1da177e4 | 533 | |
8db85d4c AS |
534 | strcpy(event->device_class, device_class); |
535 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
536 | event->type = type; |
537 | event->data = data; | |
538 | ||
539 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
540 | list_add_tail(&event->node, &acpi_bus_event_list); | |
541 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
542 | ||
543 | wake_up_interruptible(&acpi_bus_event_queue); | |
544 | ||
d550d98d | 545 | return 0; |
8db85d4c AS |
546 | |
547 | } | |
548 | ||
549 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
550 | ||
551 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
552 | { | |
553 | if (!device) | |
554 | return -EINVAL; | |
555 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
556 | device->pnp.bus_id, type, data); | |
1da177e4 | 557 | } |
4be44fcd | 558 | |
14e04fb3 | 559 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 560 | |
4be44fcd | 561 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 562 | { |
4be44fcd LB |
563 | unsigned long flags = 0; |
564 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
565 | |
566 | DECLARE_WAITQUEUE(wait, current); | |
567 | ||
1da177e4 LT |
568 | |
569 | if (!event) | |
d550d98d | 570 | return -EINVAL; |
1da177e4 LT |
571 | |
572 | if (list_empty(&acpi_bus_event_list)) { | |
573 | ||
574 | set_current_state(TASK_INTERRUPTIBLE); | |
575 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
576 | ||
577 | if (list_empty(&acpi_bus_event_list)) | |
578 | schedule(); | |
579 | ||
580 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
581 | set_current_state(TASK_RUNNING); | |
582 | ||
583 | if (signal_pending(current)) | |
d550d98d | 584 | return -ERESTARTSYS; |
1da177e4 LT |
585 | } |
586 | ||
587 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
588 | if (!list_empty(&acpi_bus_event_list)) { |
589 | entry = list_entry(acpi_bus_event_list.next, | |
590 | struct acpi_bus_event, node); | |
1da177e4 | 591 | list_del(&entry->node); |
f0a37e00 | 592 | } |
1da177e4 LT |
593 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
594 | ||
595 | if (!entry) | |
d550d98d | 596 | return -ENODEV; |
1da177e4 LT |
597 | |
598 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
599 | ||
600 | kfree(entry); | |
601 | ||
d550d98d | 602 | return 0; |
1da177e4 | 603 | } |
1da177e4 | 604 | |
14e04fb3 | 605 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
606 | |
607 | /* -------------------------------------------------------------------------- | |
608 | Notification Handling | |
609 | -------------------------------------------------------------------------- */ | |
610 | ||
ff754e2e | 611 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 612 | { |
ff754e2e | 613 | struct acpi_device *device; |
cdd5b8ca | 614 | acpi_status status; |
1da177e4 LT |
615 | struct acpi_device_status old_status; |
616 | ||
ff754e2e BH |
617 | if (acpi_bus_get_device(handle, &device)) |
618 | return; | |
1da177e4 | 619 | if (!device) |
cdd5b8ca | 620 | return; |
1da177e4 | 621 | |
1da177e4 LT |
622 | old_status = device->status; |
623 | ||
624 | /* | |
625 | * Make sure this device's parent is present before we go about | |
626 | * messing with the device. | |
627 | */ | |
628 | if (device->parent && !device->parent->status.present) { | |
629 | device->status = device->parent->status; | |
cdd5b8ca | 630 | return; |
1da177e4 LT |
631 | } |
632 | ||
633 | status = acpi_bus_get_status(device); | |
634 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 635 | return; |
1da177e4 LT |
636 | |
637 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 638 | return; |
1da177e4 | 639 | |
1da177e4 LT |
640 | /* |
641 | * Device Insertion/Removal | |
642 | */ | |
643 | if ((device->status.present) && !(old_status.present)) { | |
644 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
645 | /* TBD: Handle device insertion */ | |
4be44fcd | 646 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
647 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
648 | /* TBD: Handle device removal */ | |
649 | } | |
1da177e4 LT |
650 | } |
651 | ||
ff754e2e | 652 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 653 | { |
1da177e4 | 654 | /* Status Change? */ |
ff754e2e | 655 | acpi_bus_check_device(handle); |
1da177e4 | 656 | |
1da177e4 LT |
657 | /* |
658 | * TBD: Enumerate child devices within this device's scope and | |
659 | * run acpi_bus_check_device()'s on them. | |
660 | */ | |
1da177e4 LT |
661 | } |
662 | ||
6bd00a61 SL |
663 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
664 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
665 | { | |
666 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
667 | } | |
668 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
669 | ||
670 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
671 | { | |
672 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
673 | } | |
674 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
675 | ||
1da177e4 LT |
676 | /** |
677 | * acpi_bus_notify | |
678 | * --------------- | |
679 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
680 | */ | |
4be44fcd | 681 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 682 | { |
4be44fcd | 683 | struct acpi_device *device = NULL; |
6d278131 | 684 | struct acpi_driver *driver; |
1da177e4 | 685 | |
02c37bd8 BH |
686 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
687 | type, handle)); | |
688 | ||
6bd00a61 SL |
689 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
690 | type, (void *)handle); | |
1da177e4 | 691 | |
1da177e4 LT |
692 | switch (type) { |
693 | ||
694 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 695 | acpi_bus_check_scope(handle); |
aafbcd16 | 696 | /* |
1da177e4 | 697 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 698 | * drivers via the device manager (device.c). |
1da177e4 LT |
699 | */ |
700 | break; | |
701 | ||
702 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 703 | acpi_bus_check_device(handle); |
aafbcd16 | 704 | /* |
1da177e4 | 705 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 706 | * drivers via the device manager (device.c). |
1da177e4 LT |
707 | */ |
708 | break; | |
709 | ||
710 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
711 | /* TBD */ |
712 | break; | |
713 | ||
714 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
715 | /* TBD */ |
716 | break; | |
717 | ||
718 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
719 | /* TBD: Exactly what does 'light' mean? */ |
720 | break; | |
721 | ||
722 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
723 | /* TBD */ |
724 | break; | |
725 | ||
726 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
727 | /* TBD */ |
728 | break; | |
729 | ||
730 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
731 | /* TBD */ |
732 | break; | |
733 | ||
734 | default: | |
4be44fcd LB |
735 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
736 | "Received unknown/unsupported notification [%08x]\n", | |
737 | type)); | |
1da177e4 LT |
738 | break; |
739 | } | |
740 | ||
ff754e2e BH |
741 | acpi_bus_get_device(handle, &device); |
742 | if (device) { | |
743 | driver = device->driver; | |
744 | if (driver && driver->ops.notify && | |
745 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
746 | driver->ops.notify(device, type); | |
747 | } | |
1da177e4 LT |
748 | } |
749 | ||
750 | /* -------------------------------------------------------------------------- | |
751 | Initialization/Cleanup | |
752 | -------------------------------------------------------------------------- */ | |
753 | ||
4be44fcd | 754 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 755 | { |
4be44fcd LB |
756 | acpi_status status = AE_OK; |
757 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
758 | struct acpi_object_list arg_list = { 1, &arg }; | |
759 | char *message = NULL; | |
1da177e4 | 760 | |
1da177e4 | 761 | |
aafbcd16 | 762 | /* |
1da177e4 LT |
763 | * Let the system know what interrupt model we are using by |
764 | * evaluating the \_PIC object, if exists. | |
765 | */ | |
766 | ||
767 | switch (acpi_irq_model) { | |
768 | case ACPI_IRQ_MODEL_PIC: | |
769 | message = "PIC"; | |
770 | break; | |
771 | case ACPI_IRQ_MODEL_IOAPIC: | |
772 | message = "IOAPIC"; | |
773 | break; | |
774 | case ACPI_IRQ_MODEL_IOSAPIC: | |
775 | message = "IOSAPIC"; | |
776 | break; | |
3948ec94 JK |
777 | case ACPI_IRQ_MODEL_PLATFORM: |
778 | message = "platform specific model"; | |
779 | break; | |
1da177e4 LT |
780 | default: |
781 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 782 | return -ENODEV; |
1da177e4 LT |
783 | } |
784 | ||
785 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
786 | ||
787 | arg.integer.value = acpi_irq_model; | |
788 | ||
789 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
790 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 791 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 792 | return -ENODEV; |
1da177e4 LT |
793 | } |
794 | ||
d550d98d | 795 | return 0; |
1da177e4 LT |
796 | } |
797 | ||
67a119f9 | 798 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
799 | |
800 | ||
4be44fcd | 801 | void __init acpi_early_init(void) |
1da177e4 | 802 | { |
4be44fcd | 803 | acpi_status status = AE_OK; |
1da177e4 LT |
804 | |
805 | if (acpi_disabled) | |
d550d98d | 806 | return; |
1da177e4 | 807 | |
61686124 BM |
808 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
809 | ||
1da177e4 LT |
810 | /* enable workarounds, unless strict ACPI spec. compliance */ |
811 | if (!acpi_strict) | |
812 | acpi_gbl_enable_interpreter_slack = TRUE; | |
813 | ||
ad71860a AS |
814 | acpi_gbl_permanent_mmap = 1; |
815 | ||
816 | status = acpi_reallocate_root_table(); | |
817 | if (ACPI_FAILURE(status)) { | |
818 | printk(KERN_ERR PREFIX | |
819 | "Unable to reallocate ACPI tables\n"); | |
820 | goto error0; | |
821 | } | |
822 | ||
1da177e4 LT |
823 | status = acpi_initialize_subsystem(); |
824 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
825 | printk(KERN_ERR PREFIX |
826 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
827 | goto error0; |
828 | } | |
829 | ||
830 | status = acpi_load_tables(); | |
831 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
832 | printk(KERN_ERR PREFIX |
833 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
834 | goto error0; |
835 | } | |
836 | ||
1da177e4 LT |
837 | #ifdef CONFIG_X86 |
838 | if (!acpi_ioapic) { | |
1da177e4 | 839 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
840 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
841 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
842 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
843 | } | |
1da177e4 | 844 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 845 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 846 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 847 | } else { |
1da177e4 | 848 | /* |
cee324b1 | 849 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
850 | * update it with result from INT_SRC_OVR parsing |
851 | */ | |
cee324b1 | 852 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
853 | } |
854 | #endif | |
855 | ||
4be44fcd LB |
856 | status = |
857 | acpi_enable_subsystem(~ | |
858 | (ACPI_NO_HARDWARE_INIT | | |
859 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
860 | if (ACPI_FAILURE(status)) { |
861 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
862 | goto error0; | |
863 | } | |
864 | ||
d550d98d | 865 | return; |
1da177e4 | 866 | |
4be44fcd | 867 | error0: |
1da177e4 | 868 | disable_acpi(); |
d550d98d | 869 | return; |
1da177e4 LT |
870 | } |
871 | ||
4be44fcd | 872 | static int __init acpi_bus_init(void) |
1da177e4 | 873 | { |
4be44fcd LB |
874 | int result = 0; |
875 | acpi_status status = AE_OK; | |
876 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 877 | |
176f9c18 | 878 | acpi_os_initialize1(); |
1da177e4 | 879 | |
4be44fcd LB |
880 | status = |
881 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 882 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
883 | printk(KERN_ERR PREFIX |
884 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
885 | goto error1; |
886 | } | |
887 | ||
1da177e4 LT |
888 | /* |
889 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
890 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
891 | * is called). | |
892 | * | |
aafbcd16 | 893 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
894 | * the EC parameters out of that. |
895 | */ | |
896 | status = acpi_ec_ecdt_probe(); | |
897 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 898 | |
3563ff96 SL |
899 | acpi_bus_osc_support(); |
900 | ||
1da177e4 LT |
901 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
902 | if (ACPI_FAILURE(status)) { | |
903 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
904 | goto error1; | |
905 | } | |
906 | ||
78f16996 AC |
907 | acpi_early_processor_set_pdc(); |
908 | ||
455c8793 ZY |
909 | /* |
910 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
911 | * is necessary to enable it as early as possible. | |
912 | */ | |
913 | acpi_boot_ec_enable(); | |
914 | ||
1da177e4 LT |
915 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
916 | ||
aafbcd16 AS |
917 | /* Initialize sleep structures */ |
918 | acpi_sleep_init(); | |
919 | ||
1da177e4 LT |
920 | /* |
921 | * Get the system interrupt model and evaluate \_PIC. | |
922 | */ | |
923 | result = acpi_bus_init_irq(); | |
924 | if (result) | |
925 | goto error1; | |
926 | ||
927 | /* | |
928 | * Register the for all standard device notifications. | |
929 | */ | |
4be44fcd LB |
930 | status = |
931 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
932 | &acpi_bus_notify, NULL); | |
1da177e4 | 933 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
934 | printk(KERN_ERR PREFIX |
935 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
936 | goto error1; |
937 | } | |
938 | ||
939 | /* | |
940 | * Create the top ACPI proc directory | |
941 | */ | |
942 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
943 | ||
d550d98d | 944 | return 0; |
1da177e4 LT |
945 | |
946 | /* Mimic structured exception handling */ | |
4be44fcd | 947 | error1: |
1da177e4 | 948 | acpi_terminate(); |
d550d98d | 949 | return -ENODEV; |
1da177e4 LT |
950 | } |
951 | ||
99e0d2fc | 952 | struct kobject *acpi_kobj; |
1da177e4 | 953 | |
4be44fcd | 954 | static int __init acpi_init(void) |
1da177e4 | 955 | { |
4be44fcd | 956 | int result = 0; |
1da177e4 | 957 | |
1da177e4 | 958 | |
1da177e4 LT |
959 | if (acpi_disabled) { |
960 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 961 | return -ENODEV; |
1da177e4 LT |
962 | } |
963 | ||
f62ed9e3 | 964 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 965 | if (!acpi_kobj) { |
96b2dd1f | 966 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
967 | acpi_kobj = NULL; |
968 | } | |
1da177e4 | 969 | |
0e46517d | 970 | init_acpi_device_notify(); |
1da177e4 LT |
971 | result = acpi_bus_init(); |
972 | ||
973 | if (!result) { | |
7752d5cf | 974 | pci_mmcfg_late_init(); |
9f9adecd LB |
975 | if (!(pm_flags & PM_APM)) |
976 | pm_flags |= PM_ACPI; | |
1da177e4 | 977 | else { |
4be44fcd LB |
978 | printk(KERN_INFO PREFIX |
979 | "APM is already active, exiting\n"); | |
1da177e4 LT |
980 | disable_acpi(); |
981 | result = -ENODEV; | |
982 | } | |
1da177e4 LT |
983 | } else |
984 | disable_acpi(); | |
81d0273d BH |
985 | |
986 | if (acpi_disabled) | |
987 | return result; | |
988 | ||
6415e12b ZY |
989 | /* |
990 | * If the laptop falls into the DMI check table, the power state check | |
991 | * will be disabled in the course of device power transistion. | |
992 | */ | |
993 | dmi_check_system(power_nocheck_dmi_table); | |
e747f274 BH |
994 | |
995 | acpi_scan_init(); | |
a5f820fe | 996 | acpi_ec_init(); |
44515374 | 997 | acpi_power_init(); |
141a0af3 | 998 | acpi_system_init(); |
84f810c3 | 999 | acpi_debug_init(); |
9cee43e0 | 1000 | acpi_sleep_proc_init(); |
201b8c65 | 1001 | acpi_wakeup_device_init(); |
d550d98d | 1002 | return result; |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | subsys_initcall(acpi_init); |