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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 | * | |
1da177e4 LT |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/ioport.h> | |
d568df84 | 24 | #include <linux/kernel.h> |
1da177e4 LT |
25 | #include <linux/list.h> |
26 | #include <linux/sched.h> | |
27 | #include <linux/pm.h> | |
28 | #include <linux/device.h> | |
29 | #include <linux/proc_fs.h> | |
6697c052 | 30 | #include <linux/acpi.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
49a12877 | 32 | #include <linux/regulator/machine.h> |
baa0c019 PP |
33 | #include <linux/workqueue.h> |
34 | #include <linux/reboot.h> | |
35 | #include <linux/delay.h> | |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
88ef16d8 | 39 | #include <linux/acpi_iort.h> |
7752d5cf | 40 | #include <linux/pci.h> |
eccddd32 | 41 | #include <acpi/apei.h> |
eb27cae8 | 42 | #include <linux/dmi.h> |
cd51e61c | 43 | #include <linux/suspend.h> |
1da177e4 | 44 | |
e60cc7a6 BH |
45 | #include "internal.h" |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 48 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 49 | |
4be44fcd LB |
50 | struct acpi_device *acpi_root; |
51 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
52 | EXPORT_SYMBOL(acpi_root_dir); |
53 | ||
cce4f632 | 54 | #ifdef CONFIG_X86 |
73577d1d LZ |
55 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
56 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
57 | { | |
58 | return 0; | |
59 | } | |
60 | #else | |
aa2110cb LM |
61 | static int set_copy_dsdt(const struct dmi_system_id *id) |
62 | { | |
63 | printk(KERN_NOTICE "%s detected - " | |
64 | "force copy of DSDT to local memory\n", id->ident); | |
65 | acpi_gbl_copy_dsdt_locally = 1; | |
66 | return 0; | |
67 | } | |
73577d1d | 68 | #endif |
84d7b8fd KHF |
69 | static int set_gbl_term_list(const struct dmi_system_id *id) |
70 | { | |
71 | acpi_gbl_parse_table_as_term_list = 1; | |
72 | return 0; | |
73 | } | |
aa2110cb | 74 | |
84d7b8fd KHF |
75 | static const struct dmi_system_id acpi_quirks_dmi_table[] __initconst = { |
76 | /* | |
77 | * Touchpad on Dell XPS 9570/Precision M5530 doesn't work under I2C | |
78 | * mode. | |
79 | * https://bugzilla.kernel.org/show_bug.cgi?id=198515 | |
80 | */ | |
81 | { | |
82 | .callback = set_gbl_term_list, | |
83 | .ident = "Dell Precision M5530", | |
84 | .matches = { | |
85 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
86 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision M5530"), | |
87 | }, | |
88 | }, | |
89 | { | |
90 | .callback = set_gbl_term_list, | |
91 | .ident = "Dell XPS 15 9570", | |
92 | .matches = { | |
93 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
94 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9570"), | |
95 | }, | |
96 | }, | |
aa2110cb | 97 | /* |
100cf877 | 98 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
84d7b8fd | 99 | * DSDT will be copied to memory. |
aa2110cb LM |
100 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
101 | */ | |
102 | { | |
103 | .callback = set_copy_dsdt, | |
100cf877 | 104 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
105 | .matches = { |
106 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 107 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 108 | }, |
cce4f632 LM |
109 | }, |
110 | {} | |
aa2110cb | 111 | }; |
abd273f5 AM |
112 | |
113 | static const char * const acpi_quirk_lenovo_bios_ids[] = { | |
114 | "N2H", /* first 3 bytes of Lenovo BIOS version */ | |
115 | NULL | |
116 | }; | |
117 | ||
118 | bool acpi_quirk_matches_bios_ids(const char * const ids[]) | |
119 | { | |
120 | const char *bios_vendor = dmi_get_system_info(DMI_BIOS_VENDOR); | |
121 | const char *bios_ver = dmi_get_system_info(DMI_BIOS_VERSION); | |
122 | int i; | |
123 | ||
124 | if ((!bios_vendor) && (!bios_ver) && strncmp(bios_vendor, "LENOVO", 6)) | |
125 | return false; | |
126 | ||
127 | for (i = 0; ids[i]; i++) | |
128 | if (!strncmp(bios_ver, ids[i], 3)) { | |
129 | acpi_gbl_parse_table_as_term_list = 1; | |
130 | return true; | |
131 | } | |
132 | ||
133 | return false; | |
134 | } | |
135 | ||
cce4f632 | 136 | #else |
84d7b8fd | 137 | static const struct dmi_system_id acpi_quirks_dmi_table[] __initconst = { |
cce4f632 LM |
138 | {} |
139 | }; | |
abd273f5 AM |
140 | |
141 | static const char * const acpi_quirk_lenovo_bios_ids[] = { | |
142 | NULL | |
143 | }; | |
144 | ||
145 | bool acpi_quirk_matches_bios_ids(const char * const ids[]) | |
146 | { | |
147 | return false; | |
148 | } | |
cce4f632 | 149 | #endif |
aa2110cb | 150 | |
1da177e4 LT |
151 | /* -------------------------------------------------------------------------- |
152 | Device Management | |
153 | -------------------------------------------------------------------------- */ | |
154 | ||
402ac536 BH |
155 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
156 | unsigned long long *sta) | |
1da177e4 | 157 | { |
402ac536 | 158 | acpi_status status; |
4be44fcd | 159 | |
402ac536 BH |
160 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
161 | if (ACPI_SUCCESS(status)) | |
162 | return AE_OK; | |
1da177e4 | 163 | |
402ac536 BH |
164 | if (status == AE_NOT_FOUND) { |
165 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
166 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
167 | return AE_OK; | |
1da177e4 | 168 | } |
402ac536 BH |
169 | return status; |
170 | } | |
1da177e4 | 171 | |
402ac536 BH |
172 | int acpi_bus_get_status(struct acpi_device *device) |
173 | { | |
174 | acpi_status status; | |
175 | unsigned long long sta; | |
176 | ||
b7ecf663 HG |
177 | if (acpi_device_always_present(device)) { |
178 | acpi_set_device_status(device, ACPI_STA_DEFAULT); | |
179 | return 0; | |
180 | } | |
181 | ||
d32b102f HG |
182 | /* Battery devices must have their deps met before calling _STA */ |
183 | if (acpi_device_is_battery(device) && device->dep_unmet) { | |
184 | acpi_set_device_status(device, 0); | |
185 | return 0; | |
186 | } | |
187 | ||
402ac536 BH |
188 | status = acpi_bus_get_status_handle(device->handle, &sta); |
189 | if (ACPI_FAILURE(status)) | |
190 | return -ENODEV; | |
191 | ||
25db115b | 192 | acpi_set_device_status(device, sta); |
1da177e4 LT |
193 | |
194 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
195 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
196 | "functional but not present;\n", | |
25db115b | 197 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
198 | } |
199 | ||
4be44fcd | 200 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 201 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 202 | return 0; |
1da177e4 | 203 | } |
4be44fcd | 204 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 205 | |
20733939 | 206 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 207 | void *context) |
20733939 ZR |
208 | { |
209 | return; | |
210 | } | |
211 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
212 | ||
72013795 LT |
213 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
214 | { | |
215 | acpi_status status; | |
216 | ||
217 | status = acpi_attach_data(handle, | |
218 | acpi_bus_private_data_handler, data); | |
219 | if (ACPI_FAILURE(status)) { | |
220 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
221 | return -ENODEV; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
227 | ||
20733939 ZR |
228 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
229 | { | |
6a8c0af6 | 230 | acpi_status status; |
20733939 ZR |
231 | |
232 | if (!*data) | |
233 | return -EINVAL; | |
234 | ||
235 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
236 | if (ACPI_FAILURE(status)) { |
237 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
238 | return -ENODEV; |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
72013795 LT |
243 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
244 | ||
245 | void acpi_bus_detach_private_data(acpi_handle handle) | |
246 | { | |
247 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
248 | } | |
249 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 250 | |
70023de8 | 251 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 252 | struct acpi_osc_context *context, char *error) |
70023de8 | 253 | { |
70023de8 SL |
254 | int i; |
255 | ||
f26f5c8b RW |
256 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
257 | ||
258 | pr_debug("_OSC request data:"); | |
70023de8 | 259 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
260 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
261 | ||
262 | pr_debug("\n"); | |
70023de8 SL |
263 | } |
264 | ||
70023de8 SL |
265 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) |
266 | { | |
267 | acpi_status status; | |
268 | struct acpi_object_list input; | |
269 | union acpi_object in_params[4]; | |
270 | union acpi_object *out_obj; | |
dfcaad8f | 271 | guid_t guid; |
70023de8 | 272 | u32 errors; |
9dc130fc | 273 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
274 | |
275 | if (!context) | |
276 | return AE_ERROR; | |
dfcaad8f | 277 | if (guid_parse(context->uuid_str, &guid)) |
70023de8 SL |
278 | return AE_ERROR; |
279 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
280 | context->ret.pointer = NULL; | |
281 | ||
282 | /* Setting up input parameters */ | |
283 | input.count = 4; | |
284 | input.pointer = in_params; | |
285 | in_params[0].type = ACPI_TYPE_BUFFER; | |
286 | in_params[0].buffer.length = 16; | |
dfcaad8f | 287 | in_params[0].buffer.pointer = (u8 *)&guid; |
70023de8 SL |
288 | in_params[1].type = ACPI_TYPE_INTEGER; |
289 | in_params[1].integer.value = context->rev; | |
290 | in_params[2].type = ACPI_TYPE_INTEGER; | |
291 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
292 | in_params[3].type = ACPI_TYPE_BUFFER; | |
293 | in_params[3].buffer.length = context->cap.length; | |
294 | in_params[3].buffer.pointer = context->cap.pointer; | |
295 | ||
9dc130fc | 296 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
297 | if (ACPI_FAILURE(status)) |
298 | return status; | |
299 | ||
9dc130fc | 300 | if (!output.length) |
70023de8 SL |
301 | return AE_NULL_OBJECT; |
302 | ||
9dc130fc SL |
303 | out_obj = output.pointer; |
304 | if (out_obj->type != ACPI_TYPE_BUFFER | |
305 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
306 | acpi_print_osc_error(handle, context, |
307 | "_OSC evaluation returned wrong type"); | |
308 | status = AE_TYPE; | |
309 | goto out_kfree; | |
310 | } | |
311 | /* Need to ignore the bit0 in result code */ | |
312 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
313 | if (errors) { | |
314 | if (errors & OSC_REQUEST_ERROR) | |
315 | acpi_print_osc_error(handle, context, | |
316 | "_OSC request failed"); | |
317 | if (errors & OSC_INVALID_UUID_ERROR) | |
318 | acpi_print_osc_error(handle, context, | |
319 | "_OSC invalid UUID"); | |
320 | if (errors & OSC_INVALID_REVISION_ERROR) | |
321 | acpi_print_osc_error(handle, context, | |
322 | "_OSC invalid revision"); | |
323 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 324 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
325 | & OSC_QUERY_ENABLE) |
326 | goto out_success; | |
327 | status = AE_SUPPORT; | |
328 | goto out_kfree; | |
329 | } | |
330 | status = AE_ERROR; | |
331 | goto out_kfree; | |
332 | } | |
333 | out_success: | |
9dc130fc | 334 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
335 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
336 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
337 | if (!context->ret.pointer) { |
338 | status = AE_NO_MEMORY; | |
339 | goto out_kfree; | |
340 | } | |
9dc130fc | 341 | status = AE_OK; |
70023de8 SL |
342 | |
343 | out_kfree: | |
9dc130fc SL |
344 | kfree(output.pointer); |
345 | if (status != AE_OK) | |
346 | context->ret.pointer = NULL; | |
70023de8 SL |
347 | return status; |
348 | } | |
349 | EXPORT_SYMBOL(acpi_run_osc); | |
350 | ||
eccddd32 | 351 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
352 | |
353 | /* | |
354 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
355 | * OSPM supports platform coordinated low power idle(LPI) states | |
356 | */ | |
357 | bool osc_pc_lpi_support_confirmed; | |
358 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
359 | ||
3563ff96 SL |
360 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
361 | static void acpi_bus_osc_support(void) | |
362 | { | |
363 | u32 capbuf[2]; | |
364 | struct acpi_osc_context context = { | |
365 | .uuid_str = sb_uuid_str, | |
366 | .rev = 1, | |
367 | .cap.length = 8, | |
368 | .cap.pointer = capbuf, | |
369 | }; | |
370 | acpi_handle handle; | |
371 | ||
b938a229 BH |
372 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
373 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
374 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
375 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
376 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
377 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 378 | |
b938a229 | 379 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 380 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 381 | |
5c2832e9 SP |
382 | #ifdef CONFIG_X86 |
383 | if (boot_cpu_has(X86_FEATURE_HWP)) { | |
384 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
385 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
386 | } | |
387 | #endif | |
388 | ||
de966cf4 | 389 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
390 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
391 | ||
eccddd32 | 392 | if (!ghes_disable) |
b938a229 | 393 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
394 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
395 | return; | |
eccddd32 HY |
396 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
397 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 398 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 399 | osc_sb_apei_support_acked = |
b938a229 | 400 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
401 | osc_pc_lpi_support_confirmed = |
402 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
403 | } | |
3563ff96 | 404 | kfree(context.ret.pointer); |
eccddd32 HY |
405 | } |
406 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
407 | } |
408 | ||
1da177e4 LT |
409 | /* -------------------------------------------------------------------------- |
410 | Notification Handling | |
411 | -------------------------------------------------------------------------- */ | |
412 | ||
1da177e4 LT |
413 | /** |
414 | * acpi_bus_notify | |
415 | * --------------- | |
416 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
417 | */ | |
4be44fcd | 418 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 419 | { |
1a699476 | 420 | struct acpi_device *adev; |
6d278131 | 421 | struct acpi_driver *driver; |
1a699476 | 422 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 423 | bool hotplug_event = false; |
02c37bd8 | 424 | |
1da177e4 | 425 | switch (type) { |
1da177e4 | 426 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 427 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 428 | hotplug_event = true; |
1da177e4 LT |
429 | break; |
430 | ||
431 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 432 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 433 | hotplug_event = true; |
1da177e4 LT |
434 | break; |
435 | ||
436 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 437 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
438 | break; |
439 | ||
440 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 441 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 442 | hotplug_event = true; |
1da177e4 LT |
443 | break; |
444 | ||
445 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 446 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
447 | /* TBD: Exactly what does 'light' mean? */ |
448 | break; | |
449 | ||
450 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
451 | acpi_handle_err(handle, "Device cannot be configured due " |
452 | "to a frequency mismatch\n"); | |
1da177e4 LT |
453 | break; |
454 | ||
455 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
456 | acpi_handle_err(handle, "Device cannot be configured due " |
457 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
458 | break; |
459 | ||
460 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 461 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
462 | break; |
463 | ||
464 | default: | |
f66abe92 RW |
465 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
466 | break; | |
1da177e4 LT |
467 | } |
468 | ||
1a699476 RW |
469 | adev = acpi_bus_get_acpi_device(handle); |
470 | if (!adev) | |
471 | goto err; | |
78ea4639 | 472 | |
1a699476 RW |
473 | driver = adev->driver; |
474 | if (driver && driver->ops.notify && | |
475 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
476 | driver->ops.notify(adev, type); | |
477 | ||
9a4d8d60 LCY |
478 | if (!hotplug_event) { |
479 | acpi_bus_put_acpi_device(adev); | |
480 | return; | |
481 | } | |
482 | ||
483 | if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) | |
d0103387 RW |
484 | return; |
485 | ||
1a699476 | 486 | acpi_bus_put_acpi_device(adev); |
1a699476 RW |
487 | |
488 | err: | |
700b8422 | 489 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
490 | } |
491 | ||
5894b0c4 RW |
492 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
493 | { | |
494 | struct acpi_device *device = data; | |
495 | ||
496 | device->driver->ops.notify(device, event); | |
497 | } | |
498 | ||
499 | static void acpi_device_notify_fixed(void *data) | |
500 | { | |
501 | struct acpi_device *device = data; | |
502 | ||
503 | /* Fixed hardware devices have no handles */ | |
504 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
505 | } | |
506 | ||
507 | static u32 acpi_device_fixed_event(void *data) | |
508 | { | |
509 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
510 | return ACPI_INTERRUPT_HANDLED; | |
511 | } | |
512 | ||
513 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
514 | { | |
515 | acpi_status status; | |
516 | ||
517 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
518 | status = | |
519 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
520 | acpi_device_fixed_event, | |
521 | device); | |
522 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
523 | status = | |
524 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
525 | acpi_device_fixed_event, | |
526 | device); | |
527 | else | |
528 | status = acpi_install_notify_handler(device->handle, | |
529 | ACPI_DEVICE_NOTIFY, | |
530 | acpi_device_notify, | |
531 | device); | |
532 | ||
533 | if (ACPI_FAILURE(status)) | |
534 | return -EINVAL; | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
539 | { | |
540 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
541 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
542 | acpi_device_fixed_event); | |
543 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
544 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
545 | acpi_device_fixed_event); | |
546 | else | |
547 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
548 | acpi_device_notify); | |
549 | } | |
550 | ||
baa0c019 PP |
551 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
552 | ||
553 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
554 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
555 | ||
556 | static void sb_notify_work(struct work_struct *dummy) | |
557 | { | |
558 | acpi_handle sb_handle; | |
559 | ||
560 | orderly_poweroff(true); | |
561 | ||
562 | /* | |
563 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
564 | * to evaluate _OST method once every 10seconds to indicate that | |
565 | * the shutdown is in progress | |
566 | */ | |
567 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
568 | while (1) { | |
569 | pr_info("Graceful shutdown in progress.\n"); | |
570 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
571 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
572 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
573 | } | |
574 | } | |
575 | ||
576 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
577 | { | |
578 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
579 | ||
580 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
581 | if (!work_busy(&acpi_sb_work)) | |
582 | schedule_work(&acpi_sb_work); | |
583 | } else | |
584 | pr_warn("event %x is not supported by \\_SB device\n", event); | |
585 | } | |
586 | ||
587 | static int __init acpi_setup_sb_notify_handler(void) | |
588 | { | |
589 | acpi_handle sb_handle; | |
590 | ||
591 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
592 | return -ENXIO; | |
593 | ||
594 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
595 | acpi_sb_notify, NULL))) | |
596 | return -EINVAL; | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
68c6b148 RW |
601 | /* -------------------------------------------------------------------------- |
602 | Device Matching | |
603 | -------------------------------------------------------------------------- */ | |
604 | ||
3b95bd16 AM |
605 | /** |
606 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
607 | * @adev: ACPI device in question | |
608 | * | |
609 | * Return: First physical node of ACPI device @adev | |
610 | */ | |
611 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
612 | { |
613 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 614 | struct device *phys_dev; |
e91a398c RW |
615 | |
616 | mutex_lock(physical_node_lock); | |
617 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 618 | phys_dev = NULL; |
e91a398c RW |
619 | } else { |
620 | const struct acpi_device_physical_node *node; | |
621 | ||
622 | node = list_first_entry(&adev->physical_node_list, | |
623 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
624 | |
625 | phys_dev = node->dev; | |
e91a398c RW |
626 | } |
627 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
628 | return phys_dev; |
629 | } | |
630 | ||
631 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
632 | const struct device *dev) | |
633 | { | |
634 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
635 | ||
636 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
637 | } |
638 | ||
3431e490 RW |
639 | /** |
640 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
641 | * @adev: ACPI companion device | |
642 | * @dev: Physical device to check | |
643 | * | |
644 | * Function checks if given @dev is the first physical devices attached to | |
645 | * the ACPI companion device. This distinction is needed in some cases | |
646 | * where the same companion device is shared between many physical devices. | |
647 | * | |
648 | * Note that the caller have to provide valid @adev pointer. | |
649 | */ | |
650 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
651 | const struct device *dev) | |
652 | { | |
e91a398c | 653 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
654 | } |
655 | ||
68c6b148 RW |
656 | /* |
657 | * acpi_companion_match() - Can we match via ACPI companion device | |
658 | * @dev: Device in question | |
659 | * | |
660 | * Check if the given device has an ACPI companion and if that companion has | |
661 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
662 | * device associated with it. Return the companion pointer if that's the case | |
663 | * or NULL otherwise. | |
664 | * | |
665 | * If multiple physical devices are attached to a single ACPI companion, we need | |
666 | * to be careful. The usage scenario for this kind of relationship is that all | |
667 | * of the physical devices in question use resources provided by the ACPI | |
668 | * companion. A typical case is an MFD device where all the sub-devices share | |
669 | * the parent's ACPI companion. In such cases we can only allow the primary | |
670 | * (first) physical device to be matched with the help of the companion's PNP | |
671 | * IDs. | |
672 | * | |
673 | * Additional physical devices sharing the ACPI companion can still use | |
674 | * resources available from it but they will be matched normally using functions | |
675 | * provided by their bus types (and analogously for their modalias). | |
676 | */ | |
677 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
678 | { | |
679 | struct acpi_device *adev; | |
68c6b148 RW |
680 | |
681 | adev = ACPI_COMPANION(dev); | |
682 | if (!adev) | |
683 | return NULL; | |
684 | ||
685 | if (list_empty(&adev->pnp.ids)) | |
686 | return NULL; | |
687 | ||
e91a398c | 688 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
689 | } |
690 | ||
691 | /** | |
692 | * acpi_of_match_device - Match device object using the "compatible" property. | |
693 | * @adev: ACPI device object to match. | |
694 | * @of_match_table: List of device IDs to match against. | |
695 | * | |
696 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
697 | * identifiers and a _DSD object with the "compatible" property, use that | |
698 | * property to match against the given list of identifiers. | |
699 | */ | |
700 | static bool acpi_of_match_device(struct acpi_device *adev, | |
701 | const struct of_device_id *of_match_table) | |
702 | { | |
703 | const union acpi_object *of_compatible, *obj; | |
704 | int i, nval; | |
705 | ||
706 | if (!adev) | |
707 | return false; | |
708 | ||
709 | of_compatible = adev->data.of_compatible; | |
710 | if (!of_match_table || !of_compatible) | |
711 | return false; | |
712 | ||
713 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
714 | nval = of_compatible->package.count; | |
715 | obj = of_compatible->package.elements; | |
716 | } else { /* Must be ACPI_TYPE_STRING. */ | |
717 | nval = 1; | |
718 | obj = of_compatible; | |
719 | } | |
720 | /* Now we can look for the driver DT compatible strings */ | |
721 | for (i = 0; i < nval; i++, obj++) { | |
722 | const struct of_device_id *id; | |
723 | ||
724 | for (id = of_match_table; id->compatible[0]; id++) | |
725 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
726 | return true; | |
727 | } | |
728 | ||
729 | return false; | |
730 | } | |
731 | ||
51ede5d9 DD |
732 | static bool acpi_of_modalias(struct acpi_device *adev, |
733 | char *modalias, size_t len) | |
734 | { | |
735 | const union acpi_object *of_compatible; | |
736 | const union acpi_object *obj; | |
737 | const char *str, *chr; | |
738 | ||
739 | of_compatible = adev->data.of_compatible; | |
740 | if (!of_compatible) | |
741 | return false; | |
742 | ||
743 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
744 | obj = of_compatible->package.elements; | |
745 | else /* Must be ACPI_TYPE_STRING. */ | |
746 | obj = of_compatible; | |
747 | ||
748 | str = obj->string.pointer; | |
749 | chr = strchr(str, ','); | |
750 | strlcpy(modalias, chr ? chr + 1 : str, len); | |
751 | ||
752 | return true; | |
753 | } | |
754 | ||
755 | /** | |
756 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
757 | * @adev: ACPI device object to match | |
758 | * @default_id: ID string to use as default if no compatible string found | |
759 | * @modalias: Pointer to buffer that modalias value will be copied into | |
760 | * @len: Length of modalias buffer | |
761 | * | |
762 | * This is a counterpart of of_modalias_node() for struct acpi_device objects. | |
763 | * If there is a compatible string for @adev, it will be copied to @modalias | |
764 | * with the vendor prefix stripped; otherwise, @default_id will be used. | |
765 | */ | |
766 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
767 | char *modalias, size_t len) | |
768 | { | |
769 | if (!acpi_of_modalias(adev, modalias, len)) | |
770 | strlcpy(modalias, default_id, len); | |
771 | } | |
772 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
773 | ||
68c6b148 RW |
774 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
775 | struct acpi_hardware_id *hwid) | |
776 | { | |
777 | int i, msk, byte_shift; | |
778 | char buf[3]; | |
779 | ||
780 | if (!id->cls) | |
781 | return false; | |
782 | ||
783 | /* Apply class-code bitmask, before checking each class-code byte */ | |
784 | for (i = 1; i <= 3; i++) { | |
785 | byte_shift = 8 * (3 - i); | |
786 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
787 | if (!msk) | |
788 | continue; | |
789 | ||
790 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
791 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
792 | return false; | |
793 | } | |
794 | return true; | |
795 | } | |
796 | ||
797 | static const struct acpi_device_id *__acpi_match_device( | |
798 | struct acpi_device *device, | |
799 | const struct acpi_device_id *ids, | |
800 | const struct of_device_id *of_ids) | |
801 | { | |
802 | const struct acpi_device_id *id; | |
803 | struct acpi_hardware_id *hwid; | |
804 | ||
805 | /* | |
806 | * If the device is not present, it is unnecessary to load device | |
807 | * driver for it. | |
808 | */ | |
809 | if (!device || !device->status.present) | |
810 | return NULL; | |
811 | ||
812 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
813 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
814 | for (id = ids; id->id[0] || id->cls; id++) { | |
815 | if (id->id[0] && !strcmp((char *) id->id, hwid->id)) | |
816 | return id; | |
817 | else if (id->cls && __acpi_match_device_cls(id, hwid)) | |
818 | return id; | |
819 | } | |
820 | ||
821 | /* | |
822 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
823 | * "compatible" property if found. | |
824 | * | |
825 | * The id returned by the below is not valid, but the only | |
826 | * caller passing non-NULL of_ids here is only interested in | |
827 | * whether or not the return value is NULL. | |
828 | */ | |
829 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) | |
830 | && acpi_of_match_device(device, of_ids)) | |
831 | return id; | |
832 | } | |
833 | return NULL; | |
834 | } | |
835 | ||
836 | /** | |
837 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
838 | * @ids: Array of struct acpi_device_id object to match against. | |
839 | * @dev: The device structure to match. | |
840 | * | |
841 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
842 | * object for that handle and use that object to match against a given list of | |
843 | * device IDs. | |
844 | * | |
845 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
846 | */ | |
847 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
848 | const struct device *dev) | |
849 | { | |
850 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); | |
851 | } | |
852 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
853 | ||
854 | int acpi_match_device_ids(struct acpi_device *device, | |
855 | const struct acpi_device_id *ids) | |
856 | { | |
857 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; | |
858 | } | |
859 | EXPORT_SYMBOL(acpi_match_device_ids); | |
860 | ||
861 | bool acpi_driver_match_device(struct device *dev, | |
862 | const struct device_driver *drv) | |
863 | { | |
864 | if (!drv->acpi_match_table) | |
865 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
866 | drv->of_match_table); | |
867 | ||
868 | return !!__acpi_match_device(acpi_companion_match(dev), | |
869 | drv->acpi_match_table, drv->of_match_table); | |
870 | } | |
871 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
872 | ||
5894b0c4 RW |
873 | /* -------------------------------------------------------------------------- |
874 | ACPI Driver Management | |
875 | -------------------------------------------------------------------------- */ | |
876 | ||
877 | /** | |
878 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
879 | * @driver: driver being registered | |
880 | * | |
881 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
882 | * devices that match the driver's criteria and binds. Returns zero for | |
883 | * success or a negative error status for failure. | |
884 | */ | |
885 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
886 | { | |
887 | int ret; | |
888 | ||
889 | if (acpi_disabled) | |
890 | return -ENODEV; | |
891 | driver->drv.name = driver->name; | |
892 | driver->drv.bus = &acpi_bus_type; | |
893 | driver->drv.owner = driver->owner; | |
894 | ||
895 | ret = driver_register(&driver->drv); | |
896 | return ret; | |
897 | } | |
898 | ||
899 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
900 | ||
901 | /** | |
902 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
903 | * @driver: driver to unregister | |
904 | * | |
905 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
906 | * devices that match the driver's criteria and unbinds. | |
907 | */ | |
908 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
909 | { | |
910 | driver_unregister(&driver->drv); | |
911 | } | |
912 | ||
913 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
914 | ||
915 | /* -------------------------------------------------------------------------- | |
916 | ACPI Bus operations | |
917 | -------------------------------------------------------------------------- */ | |
918 | ||
919 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
920 | { | |
921 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
922 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
923 | ||
924 | return acpi_dev->flags.match_driver | |
925 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
926 | } | |
927 | ||
928 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
929 | { | |
930 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
931 | } | |
932 | ||
933 | static int acpi_device_probe(struct device *dev) | |
934 | { | |
935 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
936 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
937 | int ret; | |
938 | ||
939 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
940 | return -EINVAL; | |
941 | ||
942 | if (!acpi_drv->ops.add) | |
943 | return -ENOSYS; | |
944 | ||
945 | ret = acpi_drv->ops.add(acpi_dev); | |
946 | if (ret) | |
947 | return ret; | |
948 | ||
949 | acpi_dev->driver = acpi_drv; | |
950 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
951 | "Driver [%s] successfully bound to device [%s]\n", | |
952 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
953 | ||
954 | if (acpi_drv->ops.notify) { | |
955 | ret = acpi_device_install_notify_handler(acpi_dev); | |
956 | if (ret) { | |
957 | if (acpi_drv->ops.remove) | |
958 | acpi_drv->ops.remove(acpi_dev); | |
959 | ||
960 | acpi_dev->driver = NULL; | |
961 | acpi_dev->driver_data = NULL; | |
962 | return ret; | |
963 | } | |
964 | } | |
965 | ||
966 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
967 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
968 | get_device(dev); | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static int acpi_device_remove(struct device * dev) | |
973 | { | |
974 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
975 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
976 | ||
977 | if (acpi_drv) { | |
978 | if (acpi_drv->ops.notify) | |
979 | acpi_device_remove_notify_handler(acpi_dev); | |
980 | if (acpi_drv->ops.remove) | |
981 | acpi_drv->ops.remove(acpi_dev); | |
982 | } | |
983 | acpi_dev->driver = NULL; | |
984 | acpi_dev->driver_data = NULL; | |
985 | ||
986 | put_device(dev); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | struct bus_type acpi_bus_type = { | |
991 | .name = "acpi", | |
992 | .match = acpi_bus_match, | |
993 | .probe = acpi_device_probe, | |
994 | .remove = acpi_device_remove, | |
995 | .uevent = acpi_device_uevent, | |
996 | }; | |
997 | ||
1da177e4 LT |
998 | /* -------------------------------------------------------------------------- |
999 | Initialization/Cleanup | |
1000 | -------------------------------------------------------------------------- */ | |
1001 | ||
4be44fcd | 1002 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 1003 | { |
6a8c0af6 | 1004 | acpi_status status; |
4be44fcd | 1005 | char *message = NULL; |
1da177e4 | 1006 | |
1da177e4 | 1007 | |
aafbcd16 | 1008 | /* |
1da177e4 LT |
1009 | * Let the system know what interrupt model we are using by |
1010 | * evaluating the \_PIC object, if exists. | |
1011 | */ | |
1012 | ||
1013 | switch (acpi_irq_model) { | |
1014 | case ACPI_IRQ_MODEL_PIC: | |
1015 | message = "PIC"; | |
1016 | break; | |
1017 | case ACPI_IRQ_MODEL_IOAPIC: | |
1018 | message = "IOAPIC"; | |
1019 | break; | |
1020 | case ACPI_IRQ_MODEL_IOSAPIC: | |
1021 | message = "IOSAPIC"; | |
1022 | break; | |
fbe61ec7 HG |
1023 | case ACPI_IRQ_MODEL_GIC: |
1024 | message = "GIC"; | |
1025 | break; | |
3948ec94 JK |
1026 | case ACPI_IRQ_MODEL_PLATFORM: |
1027 | message = "platform specific model"; | |
1028 | break; | |
1da177e4 LT |
1029 | default: |
1030 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 1031 | return -ENODEV; |
1da177e4 LT |
1032 | } |
1033 | ||
1034 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
1035 | ||
0db98202 | 1036 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 1037 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 1038 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 1039 | return -ENODEV; |
1da177e4 LT |
1040 | } |
1041 | ||
d550d98d | 1042 | return 0; |
1da177e4 LT |
1043 | } |
1044 | ||
b064a8fa RW |
1045 | /** |
1046 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1047 | * | |
1048 | * The ACPI tables are accessible after this, but the handling of events has not | |
1049 | * been initialized and the global lock is not available yet, so AML should not | |
1050 | * be executed at this point. | |
1051 | * | |
1052 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1053 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1054 | */ | |
4be44fcd | 1055 | void __init acpi_early_init(void) |
1da177e4 | 1056 | { |
6a8c0af6 | 1057 | acpi_status status; |
1da177e4 LT |
1058 | |
1059 | if (acpi_disabled) | |
d550d98d | 1060 | return; |
1da177e4 | 1061 | |
61686124 BM |
1062 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
1063 | ||
1da177e4 LT |
1064 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1065 | if (!acpi_strict) | |
1066 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1067 | ||
8d3523fb | 1068 | acpi_permanent_mmap = true; |
ad71860a | 1069 | |
84d7b8fd KHF |
1070 | /* Check machine-specific quirks */ |
1071 | dmi_check_system(acpi_quirks_dmi_table); | |
abd273f5 | 1072 | acpi_quirk_matches_bios_ids(acpi_quirk_lenovo_bios_ids); |
aa2110cb | 1073 | |
ad71860a AS |
1074 | status = acpi_reallocate_root_table(); |
1075 | if (ACPI_FAILURE(status)) { | |
1076 | printk(KERN_ERR PREFIX | |
1077 | "Unable to reallocate ACPI tables\n"); | |
1078 | goto error0; | |
1079 | } | |
1080 | ||
1da177e4 LT |
1081 | status = acpi_initialize_subsystem(); |
1082 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
1083 | printk(KERN_ERR PREFIX |
1084 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
1085 | goto error0; |
1086 | } | |
1087 | ||
1ef35668 LZ |
1088 | if (!acpi_gbl_parse_table_as_term_list && |
1089 | acpi_gbl_group_module_level_code) { | |
fe6cbea0 LZ |
1090 | status = acpi_load_tables(); |
1091 | if (ACPI_FAILURE(status)) { | |
1092 | printk(KERN_ERR PREFIX | |
1093 | "Unable to load the System Description Tables\n"); | |
1094 | goto error0; | |
1095 | } | |
1da177e4 LT |
1096 | } |
1097 | ||
1da177e4 LT |
1098 | #ifdef CONFIG_X86 |
1099 | if (!acpi_ioapic) { | |
1da177e4 | 1100 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1101 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1102 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1103 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1104 | } | |
1da177e4 | 1105 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1106 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1107 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1108 | } else { |
1da177e4 | 1109 | /* |
cee324b1 | 1110 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1111 | * update it with result from INT_SRC_OVR parsing |
1112 | */ | |
cee324b1 | 1113 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1114 | } |
1115 | #endif | |
b064a8fa RW |
1116 | return; |
1117 | ||
1118 | error0: | |
1119 | disable_acpi(); | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1124 | * | |
3af03f77 | 1125 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1126 | * |
1127 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1128 | * done before all things that really depend on ACPI. The right spot appears to | |
1129 | * be before finalizing the EFI initialization. | |
1130 | */ | |
1131 | void __init acpi_subsystem_init(void) | |
1132 | { | |
1133 | acpi_status status; | |
1134 | ||
1135 | if (acpi_disabled) | |
1136 | return; | |
1da177e4 | 1137 | |
4505a201 | 1138 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1139 | if (ACPI_FAILURE(status)) { |
1140 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1141 | disable_acpi(); |
1142 | } else { | |
1143 | /* | |
1144 | * If the system is using ACPI then we can be reasonably | |
1145 | * confident that any regulators are managed by the firmware | |
1146 | * so tell the regulator core it has everything it needs to | |
1147 | * know. | |
1148 | */ | |
1149 | regulator_has_full_constraints(); | |
1da177e4 | 1150 | } |
1da177e4 LT |
1151 | } |
1152 | ||
68bdb677 OP |
1153 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1154 | { | |
1155 | acpi_scan_table_handler(event, table, context); | |
1156 | ||
1157 | return acpi_sysfs_table_handler(event, table, context); | |
1158 | } | |
1159 | ||
4be44fcd | 1160 | static int __init acpi_bus_init(void) |
1da177e4 | 1161 | { |
6a8c0af6 BH |
1162 | int result; |
1163 | acpi_status status; | |
1da177e4 | 1164 | |
176f9c18 | 1165 | acpi_os_initialize1(); |
1da177e4 | 1166 | |
1da177e4 LT |
1167 | /* |
1168 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
fe6cbea0 LZ |
1169 | * the EC device is found in the namespace (i.e. before |
1170 | * acpi_load_tables() is called). | |
1da177e4 | 1171 | * |
aafbcd16 | 1172 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
1173 | * the EC parameters out of that. |
1174 | */ | |
1175 | status = acpi_ec_ecdt_probe(); | |
1176 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 1177 | |
1ef35668 LZ |
1178 | if (acpi_gbl_parse_table_as_term_list || |
1179 | !acpi_gbl_group_module_level_code) { | |
fe6cbea0 LZ |
1180 | status = acpi_load_tables(); |
1181 | if (ACPI_FAILURE(status)) { | |
1182 | printk(KERN_ERR PREFIX | |
1183 | "Unable to load the System Description Tables\n"); | |
1184 | goto error1; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); | |
1189 | if (ACPI_FAILURE(status)) { | |
1190 | printk(KERN_ERR PREFIX | |
1191 | "Unable to start the ACPI Interpreter\n"); | |
1192 | goto error1; | |
1193 | } | |
1194 | ||
1da177e4 LT |
1195 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1196 | if (ACPI_FAILURE(status)) { | |
1197 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1198 | goto error1; | |
1199 | } | |
1200 | ||
a2121167 SP |
1201 | /* Set capability bits for _OSC under processor scope */ |
1202 | acpi_early_processor_osc(); | |
1203 | ||
fc54ab72 LM |
1204 | /* |
1205 | * _OSC method may exist in module level code, | |
1206 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1207 | */ | |
1208 | acpi_bus_osc_support(); | |
1209 | ||
b1d248d9 ZR |
1210 | /* |
1211 | * _PDC control method may load dynamic SSDT tables, | |
1212 | * and we need to install the table handler before that. | |
1213 | */ | |
68bdb677 OP |
1214 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1215 | ||
b1d248d9 ZR |
1216 | acpi_sysfs_init(); |
1217 | ||
78f16996 AC |
1218 | acpi_early_processor_set_pdc(); |
1219 | ||
455c8793 ZY |
1220 | /* |
1221 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1222 | * is necessary to enable it as early as possible. | |
1223 | */ | |
dcf15cbd | 1224 | acpi_ec_dsdt_probe(); |
455c8793 | 1225 | |
1da177e4 LT |
1226 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1227 | ||
aafbcd16 AS |
1228 | /* Initialize sleep structures */ |
1229 | acpi_sleep_init(); | |
1230 | ||
1da177e4 LT |
1231 | /* |
1232 | * Get the system interrupt model and evaluate \_PIC. | |
1233 | */ | |
1234 | result = acpi_bus_init_irq(); | |
1235 | if (result) | |
1236 | goto error1; | |
1237 | ||
1238 | /* | |
1239 | * Register the for all standard device notifications. | |
1240 | */ | |
4be44fcd LB |
1241 | status = |
1242 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1243 | &acpi_bus_notify, NULL); | |
1da177e4 | 1244 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1245 | printk(KERN_ERR PREFIX |
1246 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1247 | goto error1; |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * Create the top ACPI proc directory | |
1252 | */ | |
1253 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1254 | ||
1dcc3d33 RW |
1255 | result = bus_register(&acpi_bus_type); |
1256 | if (!result) | |
1257 | return 0; | |
1da177e4 LT |
1258 | |
1259 | /* Mimic structured exception handling */ | |
4be44fcd | 1260 | error1: |
1da177e4 | 1261 | acpi_terminate(); |
d550d98d | 1262 | return -ENODEV; |
1da177e4 LT |
1263 | } |
1264 | ||
99e0d2fc | 1265 | struct kobject *acpi_kobj; |
f2d4753f | 1266 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1267 | |
4be44fcd | 1268 | static int __init acpi_init(void) |
1da177e4 | 1269 | { |
6831c6ed | 1270 | int result; |
1da177e4 | 1271 | |
1da177e4 LT |
1272 | if (acpi_disabled) { |
1273 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1274 | return -ENODEV; |
1da177e4 LT |
1275 | } |
1276 | ||
f62ed9e3 | 1277 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1278 | if (!acpi_kobj) { |
96b2dd1f | 1279 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1280 | acpi_kobj = NULL; |
1281 | } | |
1da177e4 | 1282 | |
0e46517d | 1283 | init_acpi_device_notify(); |
1da177e4 | 1284 | result = acpi_bus_init(); |
6831c6ed | 1285 | if (result) { |
1da177e4 | 1286 | disable_acpi(); |
81d0273d | 1287 | return result; |
6831c6ed | 1288 | } |
81d0273d | 1289 | |
6831c6ed | 1290 | pci_mmcfg_late_init(); |
88ef16d8 | 1291 | acpi_iort_init(); |
e747f274 | 1292 | acpi_scan_init(); |
a5f820fe | 1293 | acpi_ec_init(); |
a25ee920 | 1294 | acpi_debugfs_init(); |
9cee43e0 | 1295 | acpi_sleep_proc_init(); |
201b8c65 | 1296 | acpi_wakeup_device_init(); |
836d0830 | 1297 | acpi_debugger_init(); |
baa0c019 | 1298 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1299 | return 0; |
1da177e4 LT |
1300 | } |
1301 | ||
1302 | subsys_initcall(acpi_init); |