Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
4 | * | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
6 | */ |
7 | ||
ee98460b RW |
8 | #define pr_fmt(fmt) "ACPI: " fmt |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/ioport.h> | |
d568df84 | 13 | #include <linux/kernel.h> |
1da177e4 LT |
14 | #include <linux/list.h> |
15 | #include <linux/sched.h> | |
16 | #include <linux/pm.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/proc_fs.h> | |
6697c052 | 19 | #include <linux/acpi.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
49a12877 | 21 | #include <linux/regulator/machine.h> |
baa0c019 PP |
22 | #include <linux/workqueue.h> |
23 | #include <linux/reboot.h> | |
24 | #include <linux/delay.h> | |
1da177e4 LT |
25 | #ifdef CONFIG_X86 |
26 | #include <asm/mpspec.h> | |
5d128fbd | 27 | #include <linux/dmi.h> |
1da177e4 | 28 | #endif |
3cf48554 | 29 | #include <linux/acpi_viot.h> |
7752d5cf | 30 | #include <linux/pci.h> |
eccddd32 | 31 | #include <acpi/apei.h> |
cd51e61c | 32 | #include <linux/suspend.h> |
cefc7ca4 | 33 | #include <linux/prmt.h> |
1da177e4 | 34 | |
e60cc7a6 BH |
35 | #include "internal.h" |
36 | ||
4be44fcd LB |
37 | struct acpi_device *acpi_root; |
38 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
39 | EXPORT_SYMBOL(acpi_root_dir); |
40 | ||
cce4f632 | 41 | #ifdef CONFIG_X86 |
73577d1d LZ |
42 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
43 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
44 | { | |
45 | return 0; | |
46 | } | |
47 | #else | |
aa2110cb LM |
48 | static int set_copy_dsdt(const struct dmi_system_id *id) |
49 | { | |
ee98460b | 50 | pr_notice("%s detected - force copy of DSDT to local memory\n", id->ident); |
aa2110cb LM |
51 | acpi_gbl_copy_dsdt_locally = 1; |
52 | return 0; | |
53 | } | |
73577d1d | 54 | #endif |
aa2110cb | 55 | |
ae976358 | 56 | static const struct dmi_system_id dsdt_dmi_table[] __initconst = { |
aa2110cb | 57 | /* |
100cf877 | 58 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
59 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
60 | */ | |
61 | { | |
62 | .callback = set_copy_dsdt, | |
100cf877 | 63 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
64 | .matches = { |
65 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 66 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 67 | }, |
cce4f632 LM |
68 | }, |
69 | {} | |
aa2110cb | 70 | }; |
cce4f632 | 71 | #endif |
aa2110cb | 72 | |
1da177e4 LT |
73 | /* -------------------------------------------------------------------------- |
74 | Device Management | |
75 | -------------------------------------------------------------------------- */ | |
76 | ||
402ac536 BH |
77 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
78 | unsigned long long *sta) | |
1da177e4 | 79 | { |
402ac536 | 80 | acpi_status status; |
4be44fcd | 81 | |
402ac536 BH |
82 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
83 | if (ACPI_SUCCESS(status)) | |
84 | return AE_OK; | |
1da177e4 | 85 | |
402ac536 BH |
86 | if (status == AE_NOT_FOUND) { |
87 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
88 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
89 | return AE_OK; | |
1da177e4 | 90 | } |
402ac536 BH |
91 | return status; |
92 | } | |
5a98231f | 93 | EXPORT_SYMBOL_GPL(acpi_bus_get_status_handle); |
1da177e4 | 94 | |
402ac536 BH |
95 | int acpi_bus_get_status(struct acpi_device *device) |
96 | { | |
97 | acpi_status status; | |
98 | unsigned long long sta; | |
99 | ||
1a68b346 HG |
100 | if (acpi_device_override_status(device, &sta)) { |
101 | acpi_set_device_status(device, sta); | |
b7ecf663 HG |
102 | return 0; |
103 | } | |
104 | ||
54ddce70 HG |
105 | /* Battery devices must have their deps met before calling _STA */ |
106 | if (acpi_device_is_battery(device) && device->dep_unmet) { | |
107 | acpi_set_device_status(device, 0); | |
108 | return 0; | |
109 | } | |
110 | ||
402ac536 BH |
111 | status = acpi_bus_get_status_handle(device->handle, &sta); |
112 | if (ACPI_FAILURE(status)) | |
113 | return -ENODEV; | |
114 | ||
d4aa921e RW |
115 | if (!device->status.present && device->status.enabled) { |
116 | pr_info(FW_BUG "Device [%s] status [%08x]: not present and enabled\n", | |
117 | device->pnp.bus_id, (u32)sta); | |
118 | device->status.enabled = 0; | |
119 | /* | |
120 | * The status is clearly invalid, so clear the functional bit as | |
121 | * well to avoid attempting to use the device. | |
122 | */ | |
123 | device->status.functional = 0; | |
124 | } | |
125 | ||
25db115b | 126 | acpi_set_device_status(device, sta); |
1da177e4 LT |
127 | |
128 | if (device->status.functional && !device->status.present) { | |
ee98460b RW |
129 | pr_debug("Device [%s] status [%08x]: functional but not present\n", |
130 | device->pnp.bus_id, (u32)sta); | |
1da177e4 LT |
131 | } |
132 | ||
ee98460b | 133 | pr_debug("Device [%s] status [%08x]\n", device->pnp.bus_id, (u32)sta); |
d550d98d | 134 | return 0; |
1da177e4 | 135 | } |
4be44fcd | 136 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 137 | |
20733939 | 138 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 139 | void *context) |
20733939 ZR |
140 | { |
141 | return; | |
142 | } | |
143 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
144 | ||
72013795 LT |
145 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
146 | { | |
147 | acpi_status status; | |
148 | ||
149 | status = acpi_attach_data(handle, | |
150 | acpi_bus_private_data_handler, data); | |
151 | if (ACPI_FAILURE(status)) { | |
152 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
153 | return -ENODEV; | |
154 | } | |
155 | ||
156 | return 0; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
159 | ||
20733939 ZR |
160 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
161 | { | |
6a8c0af6 | 162 | acpi_status status; |
20733939 | 163 | |
627ead72 | 164 | if (!data) |
20733939 ZR |
165 | return -EINVAL; |
166 | ||
167 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
168 | if (ACPI_FAILURE(status)) { |
169 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
170 | return -ENODEV; |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
72013795 LT |
175 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
176 | ||
177 | void acpi_bus_detach_private_data(acpi_handle handle) | |
178 | { | |
179 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 182 | |
70023de8 | 183 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 184 | struct acpi_osc_context *context, char *error) |
70023de8 | 185 | { |
70023de8 SL |
186 | int i; |
187 | ||
f26f5c8b RW |
188 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
189 | ||
190 | pr_debug("_OSC request data:"); | |
70023de8 | 191 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
192 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
193 | ||
194 | pr_debug("\n"); | |
70023de8 SL |
195 | } |
196 | ||
70023de8 SL |
197 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) |
198 | { | |
199 | acpi_status status; | |
200 | struct acpi_object_list input; | |
201 | union acpi_object in_params[4]; | |
202 | union acpi_object *out_obj; | |
dfcaad8f | 203 | guid_t guid; |
70023de8 | 204 | u32 errors; |
9dc130fc | 205 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
206 | |
207 | if (!context) | |
208 | return AE_ERROR; | |
dfcaad8f | 209 | if (guid_parse(context->uuid_str, &guid)) |
70023de8 SL |
210 | return AE_ERROR; |
211 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
212 | context->ret.pointer = NULL; | |
213 | ||
214 | /* Setting up input parameters */ | |
215 | input.count = 4; | |
216 | input.pointer = in_params; | |
217 | in_params[0].type = ACPI_TYPE_BUFFER; | |
218 | in_params[0].buffer.length = 16; | |
dfcaad8f | 219 | in_params[0].buffer.pointer = (u8 *)&guid; |
70023de8 SL |
220 | in_params[1].type = ACPI_TYPE_INTEGER; |
221 | in_params[1].integer.value = context->rev; | |
222 | in_params[2].type = ACPI_TYPE_INTEGER; | |
223 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
224 | in_params[3].type = ACPI_TYPE_BUFFER; | |
225 | in_params[3].buffer.length = context->cap.length; | |
226 | in_params[3].buffer.pointer = context->cap.pointer; | |
227 | ||
9dc130fc | 228 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
229 | if (ACPI_FAILURE(status)) |
230 | return status; | |
231 | ||
9dc130fc | 232 | if (!output.length) |
70023de8 SL |
233 | return AE_NULL_OBJECT; |
234 | ||
9dc130fc SL |
235 | out_obj = output.pointer; |
236 | if (out_obj->type != ACPI_TYPE_BUFFER | |
237 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
238 | acpi_print_osc_error(handle, context, |
239 | "_OSC evaluation returned wrong type"); | |
240 | status = AE_TYPE; | |
241 | goto out_kfree; | |
242 | } | |
243 | /* Need to ignore the bit0 in result code */ | |
244 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
245 | if (errors) { | |
246 | if (errors & OSC_REQUEST_ERROR) | |
247 | acpi_print_osc_error(handle, context, | |
248 | "_OSC request failed"); | |
249 | if (errors & OSC_INVALID_UUID_ERROR) | |
250 | acpi_print_osc_error(handle, context, | |
251 | "_OSC invalid UUID"); | |
252 | if (errors & OSC_INVALID_REVISION_ERROR) | |
253 | acpi_print_osc_error(handle, context, | |
254 | "_OSC invalid revision"); | |
255 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 256 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
257 | & OSC_QUERY_ENABLE) |
258 | goto out_success; | |
259 | status = AE_SUPPORT; | |
260 | goto out_kfree; | |
261 | } | |
262 | status = AE_ERROR; | |
263 | goto out_kfree; | |
264 | } | |
265 | out_success: | |
9dc130fc | 266 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
267 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
268 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
269 | if (!context->ret.pointer) { |
270 | status = AE_NO_MEMORY; | |
271 | goto out_kfree; | |
272 | } | |
9dc130fc | 273 | status = AE_OK; |
70023de8 SL |
274 | |
275 | out_kfree: | |
9dc130fc | 276 | kfree(output.pointer); |
70023de8 SL |
277 | return status; |
278 | } | |
279 | EXPORT_SYMBOL(acpi_run_osc); | |
280 | ||
eccddd32 | 281 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
282 | |
283 | /* | |
284 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
285 | * OSPM supports platform coordinated low power idle(LPI) states | |
286 | */ | |
287 | bool osc_pc_lpi_support_confirmed; | |
288 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
289 | ||
0651ab90 PG |
290 | /* |
291 | * ACPI 6.2 Section 6.2.11.2 'Platform-Wide OSPM Capabilities': | |
292 | * Starting with ACPI Specification 6.2, all _CPC registers can be in | |
293 | * PCC, System Memory, System IO, or Functional Fixed Hardware address | |
294 | * spaces. OSPM support for this more flexible register space scheme is | |
295 | * indicated by the “Flexible Address Space for CPPC Registers” _OSC bit. | |
296 | * | |
297 | * Otherwise (cf ACPI 6.1, s8.4.7.1.1.X), _CPC registers must be in: | |
298 | * - PCC or Functional Fixed Hardware address space if defined | |
299 | * - SystemMemory address space (NULL register) if not defined | |
300 | */ | |
301 | bool osc_cpc_flexible_adr_space_confirmed; | |
302 | EXPORT_SYMBOL_GPL(osc_cpc_flexible_adr_space_confirmed); | |
303 | ||
5a6a2c0f MW |
304 | /* |
305 | * ACPI 6.4 Operating System Capabilities for USB. | |
306 | */ | |
307 | bool osc_sb_native_usb4_support_confirmed; | |
308 | EXPORT_SYMBOL_GPL(osc_sb_native_usb4_support_confirmed); | |
309 | ||
7feec743 | 310 | bool osc_sb_cppc2_support_acked; |
c42fa24b | 311 | |
3563ff96 | 312 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
719e1f56 | 313 | static void acpi_bus_osc_negotiate_platform_control(void) |
3563ff96 | 314 | { |
719e1f56 | 315 | u32 capbuf[2], *capbuf_ret; |
3563ff96 SL |
316 | struct acpi_osc_context context = { |
317 | .uuid_str = sb_uuid_str, | |
318 | .rev = 1, | |
319 | .cap.length = 8, | |
320 | .cap.pointer = capbuf, | |
321 | }; | |
322 | acpi_handle handle; | |
323 | ||
b938a229 BH |
324 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
325 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
326 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
327 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
328 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
329 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
95d43290 AW |
330 | if (IS_ENABLED(CONFIG_ACPI_THERMAL)) |
331 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_FAST_THERMAL_SAMPLING_SUPPORT; | |
eccddd32 | 332 | |
b938a229 | 333 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 334 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
6e8345f2 | 335 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_OVER_16_PSTATES_SUPPORT; |
a8a967a2 | 336 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GED_SUPPORT; |
403ad17c | 337 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_IRQ_RESOURCE_SOURCE_SUPPORT; |
392ed6a7 AL |
338 | if (IS_ENABLED(CONFIG_ACPI_PRMT)) |
339 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT; | |
d7d43321 SH |
340 | if (IS_ENABLED(CONFIG_ACPI_FFH)) |
341 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_FFH_OPR_SUPPORT; | |
c2f4191a | 342 | |
01aabca2 JC |
343 | #ifdef CONFIG_ARM64 |
344 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; | |
345 | #endif | |
5c2832e9 | 346 | #ifdef CONFIG_X86 |
01aabca2 | 347 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; |
5c2832e9 SP |
348 | #endif |
349 | ||
72f2ecb7 PG |
350 | #ifdef CONFIG_ACPI_CPPC_LIB |
351 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
352 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
5c2832e9 SP |
353 | #endif |
354 | ||
0651ab90 PG |
355 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_FLEXIBLE_ADR_SPACE; |
356 | ||
de966cf4 | 357 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
358 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
359 | ||
5a6a2c0f MW |
360 | if (IS_ENABLED(CONFIG_USB4)) |
361 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_NATIVE_USB4_SUPPORT; | |
362 | ||
eccddd32 | 363 | if (!ghes_disable) |
b938a229 | 364 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
365 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
366 | return; | |
719e1f56 ML |
367 | |
368 | if (ACPI_FAILURE(acpi_run_osc(handle, &context))) | |
369 | return; | |
370 | ||
2ca8e628 RW |
371 | capbuf_ret = context.ret.pointer; |
372 | if (context.ret.length <= OSC_SUPPORT_DWORD) { | |
373 | kfree(context.ret.pointer); | |
374 | return; | |
375 | } | |
719e1f56 | 376 | |
2ca8e628 RW |
377 | /* |
378 | * Now run _OSC again with query flag clear and with the caps | |
379 | * supported by both the OS and the platform. | |
380 | */ | |
719e1f56 | 381 | capbuf[OSC_QUERY_DWORD] = 0; |
2ca8e628 RW |
382 | capbuf[OSC_SUPPORT_DWORD] = capbuf_ret[OSC_SUPPORT_DWORD]; |
383 | kfree(context.ret.pointer); | |
719e1f56 ML |
384 | |
385 | if (ACPI_FAILURE(acpi_run_osc(handle, &context))) | |
386 | return; | |
387 | ||
388 | capbuf_ret = context.ret.pointer; | |
2ca8e628 | 389 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
7feec743 ML |
390 | #ifdef CONFIG_ACPI_CPPC_LIB |
391 | osc_sb_cppc2_support_acked = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_CPCV2_SUPPORT; | |
392 | #endif | |
393 | ||
2ca8e628 RW |
394 | osc_sb_apei_support_acked = |
395 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; | |
396 | osc_pc_lpi_support_confirmed = | |
397 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
398 | osc_sb_native_usb4_support_confirmed = | |
399 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_NATIVE_USB4_SUPPORT; | |
0651ab90 PG |
400 | osc_cpc_flexible_adr_space_confirmed = |
401 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_CPC_FLEXIBLE_ADR_SPACE; | |
2ca8e628 | 402 | } |
5a6a2c0f MW |
403 | |
404 | kfree(context.ret.pointer); | |
405 | } | |
406 | ||
407 | /* | |
408 | * Native control of USB4 capabilities. If any of the tunneling bits is | |
409 | * set it means OS is in control and we use software based connection | |
410 | * manager. | |
411 | */ | |
412 | u32 osc_sb_native_usb4_control; | |
413 | EXPORT_SYMBOL_GPL(osc_sb_native_usb4_control); | |
414 | ||
415 | static void acpi_bus_decode_usb_osc(const char *msg, u32 bits) | |
416 | { | |
8e173cbb | 417 | pr_info("%s USB3%c DisplayPort%c PCIe%c XDomain%c\n", msg, |
5a6a2c0f MW |
418 | (bits & OSC_USB_USB3_TUNNELING) ? '+' : '-', |
419 | (bits & OSC_USB_DP_TUNNELING) ? '+' : '-', | |
420 | (bits & OSC_USB_PCIE_TUNNELING) ? '+' : '-', | |
421 | (bits & OSC_USB_XDOMAIN) ? '+' : '-'); | |
422 | } | |
423 | ||
424 | static u8 sb_usb_uuid_str[] = "23A0D13A-26AB-486C-9C5F-0FFA525A575A"; | |
425 | static void acpi_bus_osc_negotiate_usb_control(void) | |
426 | { | |
6d392d8d | 427 | u32 capbuf[3], *capbuf_ret; |
5a6a2c0f MW |
428 | struct acpi_osc_context context = { |
429 | .uuid_str = sb_usb_uuid_str, | |
430 | .rev = 1, | |
431 | .cap.length = sizeof(capbuf), | |
432 | .cap.pointer = capbuf, | |
433 | }; | |
434 | acpi_handle handle; | |
435 | acpi_status status; | |
436 | u32 control; | |
437 | ||
438 | if (!osc_sb_native_usb4_support_confirmed) | |
439 | return; | |
440 | ||
441 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) | |
442 | return; | |
443 | ||
444 | control = OSC_USB_USB3_TUNNELING | OSC_USB_DP_TUNNELING | | |
445 | OSC_USB_PCIE_TUNNELING | OSC_USB_XDOMAIN; | |
446 | ||
6d392d8d MW |
447 | /* |
448 | * Run _OSC first with query bit set, trying to get control over | |
449 | * all tunneling. The platform can then clear out bits in the | |
450 | * control dword that it does not want to grant to the OS. | |
451 | */ | |
452 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; | |
5a6a2c0f MW |
453 | capbuf[OSC_SUPPORT_DWORD] = 0; |
454 | capbuf[OSC_CONTROL_DWORD] = control; | |
455 | ||
456 | status = acpi_run_osc(handle, &context); | |
457 | if (ACPI_FAILURE(status)) | |
458 | return; | |
459 | ||
460 | if (context.ret.length != sizeof(capbuf)) { | |
8e173cbb | 461 | pr_info("USB4 _OSC: returned invalid length buffer\n"); |
5a6a2c0f | 462 | goto out_free; |
719e1f56 ML |
463 | } |
464 | ||
6d392d8d MW |
465 | /* |
466 | * Run _OSC again now with query bit clear and the control dword | |
467 | * matching what the platform granted (which may not have all | |
468 | * the control bits set). | |
469 | */ | |
470 | capbuf_ret = context.ret.pointer; | |
471 | ||
472 | capbuf[OSC_QUERY_DWORD] = 0; | |
473 | capbuf[OSC_CONTROL_DWORD] = capbuf_ret[OSC_CONTROL_DWORD]; | |
474 | ||
475 | kfree(context.ret.pointer); | |
476 | ||
477 | status = acpi_run_osc(handle, &context); | |
478 | if (ACPI_FAILURE(status)) | |
479 | return; | |
480 | ||
481 | if (context.ret.length != sizeof(capbuf)) { | |
482 | pr_info("USB4 _OSC: returned invalid length buffer\n"); | |
483 | goto out_free; | |
484 | } | |
485 | ||
5a6a2c0f | 486 | osc_sb_native_usb4_control = |
6d392d8d | 487 | control & acpi_osc_ctx_get_pci_control(&context); |
5a6a2c0f MW |
488 | |
489 | acpi_bus_decode_usb_osc("USB4 _OSC: OS supports", control); | |
490 | acpi_bus_decode_usb_osc("USB4 _OSC: OS controls", | |
491 | osc_sb_native_usb4_control); | |
492 | ||
493 | out_free: | |
719e1f56 | 494 | kfree(context.ret.pointer); |
3563ff96 SL |
495 | } |
496 | ||
1da177e4 LT |
497 | /* -------------------------------------------------------------------------- |
498 | Notification Handling | |
499 | -------------------------------------------------------------------------- */ | |
500 | ||
c56610a8 RW |
501 | /** |
502 | * acpi_bus_notify - Global system-level (0x00-0x7F) notifications handler | |
503 | * @handle: Target ACPI object. | |
504 | * @type: Notification type. | |
505 | * @data: Ignored. | |
506 | * | |
507 | * This only handles notifications related to device hotplug. | |
1da177e4 | 508 | */ |
4be44fcd | 509 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 510 | { |
1a699476 | 511 | struct acpi_device *adev; |
02c37bd8 | 512 | |
1da177e4 | 513 | switch (type) { |
1da177e4 | 514 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 515 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
1da177e4 LT |
516 | break; |
517 | ||
518 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 519 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
1da177e4 LT |
520 | break; |
521 | ||
522 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 523 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
c56610a8 | 524 | return; |
1da177e4 LT |
525 | |
526 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 527 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
1da177e4 LT |
528 | break; |
529 | ||
530 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 531 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 | 532 | /* TBD: Exactly what does 'light' mean? */ |
c56610a8 | 533 | return; |
1da177e4 LT |
534 | |
535 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
536 | acpi_handle_err(handle, "Device cannot be configured due " |
537 | "to a frequency mismatch\n"); | |
c56610a8 | 538 | return; |
1da177e4 LT |
539 | |
540 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
541 | acpi_handle_err(handle, "Device cannot be configured due " |
542 | "to a bus mode mismatch\n"); | |
c56610a8 | 543 | return; |
1da177e4 LT |
544 | |
545 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 546 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
c56610a8 | 547 | return; |
1da177e4 LT |
548 | |
549 | default: | |
f66abe92 | 550 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
c56610a8 | 551 | return; |
1da177e4 LT |
552 | } |
553 | ||
45e9aa1f | 554 | adev = acpi_get_acpi_dev(handle); |
9a4d8d60 | 555 | |
c56610a8 | 556 | if (adev && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
d0103387 RW |
557 | return; |
558 | ||
45e9aa1f | 559 | acpi_put_acpi_dev(adev); |
1a699476 | 560 | |
c56610a8 | 561 | acpi_evaluate_ost(handle, type, ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); |
1da177e4 LT |
562 | } |
563 | ||
5e557cba | 564 | static void acpi_notify_device(acpi_handle handle, u32 event, void *data) |
5894b0c4 RW |
565 | { |
566 | struct acpi_device *device = data; | |
d6fb6ee1 | 567 | struct acpi_driver *acpi_drv = to_acpi_driver(device->dev.driver); |
5894b0c4 | 568 | |
d6fb6ee1 | 569 | acpi_drv->ops.notify(device, event); |
5894b0c4 RW |
570 | } |
571 | ||
c56610a8 RW |
572 | static int acpi_device_install_notify_handler(struct acpi_device *device, |
573 | struct acpi_driver *acpi_drv) | |
5894b0c4 | 574 | { |
365eac5e | 575 | u32 type = acpi_drv->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS ? |
c56610a8 | 576 | ACPI_ALL_NOTIFY : ACPI_DEVICE_NOTIFY; |
365eac5e | 577 | acpi_status status; |
c56610a8 | 578 | |
365eac5e RW |
579 | status = acpi_install_notify_handler(device->handle, type, |
580 | acpi_notify_device, device); | |
5894b0c4 RW |
581 | if (ACPI_FAILURE(status)) |
582 | return -EINVAL; | |
365eac5e | 583 | |
5894b0c4 RW |
584 | return 0; |
585 | } | |
586 | ||
c56610a8 RW |
587 | static void acpi_device_remove_notify_handler(struct acpi_device *device, |
588 | struct acpi_driver *acpi_drv) | |
5894b0c4 | 589 | { |
365eac5e | 590 | u32 type = acpi_drv->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS ? |
c56610a8 RW |
591 | ACPI_ALL_NOTIFY : ACPI_DEVICE_NOTIFY; |
592 | ||
365eac5e RW |
593 | acpi_remove_notify_handler(device->handle, type, |
594 | acpi_notify_device); | |
595 | ||
faae4437 | 596 | acpi_os_wait_events_complete(); |
5894b0c4 RW |
597 | } |
598 | ||
c542ce36 MW |
599 | int acpi_dev_install_notify_handler(struct acpi_device *adev, |
600 | u32 handler_type, | |
470508f6 | 601 | acpi_notify_handler handler, void *context) |
c542ce36 MW |
602 | { |
603 | acpi_status status; | |
604 | ||
605 | status = acpi_install_notify_handler(adev->handle, handler_type, | |
470508f6 | 606 | handler, context); |
c542ce36 MW |
607 | if (ACPI_FAILURE(status)) |
608 | return -ENODEV; | |
609 | ||
610 | return 0; | |
611 | } | |
612 | EXPORT_SYMBOL_GPL(acpi_dev_install_notify_handler); | |
613 | ||
614 | void acpi_dev_remove_notify_handler(struct acpi_device *adev, | |
615 | u32 handler_type, | |
616 | acpi_notify_handler handler) | |
617 | { | |
618 | acpi_remove_notify_handler(adev->handle, handler_type, handler); | |
619 | acpi_os_wait_events_complete(); | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(acpi_dev_remove_notify_handler); | |
622 | ||
baa0c019 PP |
623 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
624 | ||
625 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
626 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
627 | ||
628 | static void sb_notify_work(struct work_struct *dummy) | |
629 | { | |
630 | acpi_handle sb_handle; | |
631 | ||
632 | orderly_poweroff(true); | |
633 | ||
634 | /* | |
635 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
636 | * to evaluate _OST method once every 10seconds to indicate that | |
637 | * the shutdown is in progress | |
638 | */ | |
639 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
640 | while (1) { | |
641 | pr_info("Graceful shutdown in progress.\n"); | |
642 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
643 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
644 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
645 | } | |
646 | } | |
647 | ||
648 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
649 | { | |
650 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
651 | ||
652 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
653 | if (!work_busy(&acpi_sb_work)) | |
654 | schedule_work(&acpi_sb_work); | |
6d572d39 | 655 | } else { |
baa0c019 | 656 | pr_warn("event %x is not supported by \\_SB device\n", event); |
6d572d39 | 657 | } |
baa0c019 PP |
658 | } |
659 | ||
660 | static int __init acpi_setup_sb_notify_handler(void) | |
661 | { | |
662 | acpi_handle sb_handle; | |
663 | ||
664 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
665 | return -ENXIO; | |
666 | ||
667 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
668 | acpi_sb_notify, NULL))) | |
669 | return -EINVAL; | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
68c6b148 RW |
674 | /* -------------------------------------------------------------------------- |
675 | Device Matching | |
676 | -------------------------------------------------------------------------- */ | |
677 | ||
3b95bd16 AM |
678 | /** |
679 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
680 | * @adev: ACPI device in question | |
681 | * | |
682 | * Return: First physical node of ACPI device @adev | |
683 | */ | |
684 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
685 | { |
686 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 687 | struct device *phys_dev; |
e91a398c RW |
688 | |
689 | mutex_lock(physical_node_lock); | |
690 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 691 | phys_dev = NULL; |
e91a398c RW |
692 | } else { |
693 | const struct acpi_device_physical_node *node; | |
694 | ||
695 | node = list_first_entry(&adev->physical_node_list, | |
696 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
697 | |
698 | phys_dev = node->dev; | |
e91a398c RW |
699 | } |
700 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
701 | return phys_dev; |
702 | } | |
1c9698f8 | 703 | EXPORT_SYMBOL_GPL(acpi_get_first_physical_node); |
3b95bd16 AM |
704 | |
705 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
706 | const struct device *dev) | |
707 | { | |
708 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
709 | ||
710 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
711 | } |
712 | ||
3431e490 RW |
713 | /** |
714 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
715 | * @adev: ACPI companion device | |
716 | * @dev: Physical device to check | |
717 | * | |
718 | * Function checks if given @dev is the first physical devices attached to | |
719 | * the ACPI companion device. This distinction is needed in some cases | |
720 | * where the same companion device is shared between many physical devices. | |
721 | * | |
722 | * Note that the caller have to provide valid @adev pointer. | |
723 | */ | |
724 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
725 | const struct device *dev) | |
726 | { | |
e91a398c | 727 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
728 | } |
729 | ||
68c6b148 RW |
730 | /* |
731 | * acpi_companion_match() - Can we match via ACPI companion device | |
732 | * @dev: Device in question | |
733 | * | |
734 | * Check if the given device has an ACPI companion and if that companion has | |
735 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
736 | * device associated with it. Return the companion pointer if that's the case | |
737 | * or NULL otherwise. | |
738 | * | |
739 | * If multiple physical devices are attached to a single ACPI companion, we need | |
740 | * to be careful. The usage scenario for this kind of relationship is that all | |
741 | * of the physical devices in question use resources provided by the ACPI | |
742 | * companion. A typical case is an MFD device where all the sub-devices share | |
743 | * the parent's ACPI companion. In such cases we can only allow the primary | |
744 | * (first) physical device to be matched with the help of the companion's PNP | |
745 | * IDs. | |
746 | * | |
747 | * Additional physical devices sharing the ACPI companion can still use | |
748 | * resources available from it but they will be matched normally using functions | |
749 | * provided by their bus types (and analogously for their modalias). | |
750 | */ | |
86fca926 | 751 | const struct acpi_device *acpi_companion_match(const struct device *dev) |
68c6b148 RW |
752 | { |
753 | struct acpi_device *adev; | |
68c6b148 RW |
754 | |
755 | adev = ACPI_COMPANION(dev); | |
756 | if (!adev) | |
757 | return NULL; | |
758 | ||
759 | if (list_empty(&adev->pnp.ids)) | |
760 | return NULL; | |
761 | ||
e91a398c | 762 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
763 | } |
764 | ||
765 | /** | |
766 | * acpi_of_match_device - Match device object using the "compatible" property. | |
767 | * @adev: ACPI device object to match. | |
768 | * @of_match_table: List of device IDs to match against. | |
4222f38c | 769 | * @of_id: OF ID if matched |
68c6b148 RW |
770 | * |
771 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
772 | * identifiers and a _DSD object with the "compatible" property, use that | |
773 | * property to match against the given list of identifiers. | |
774 | */ | |
86fca926 | 775 | static bool acpi_of_match_device(const struct acpi_device *adev, |
4222f38c AS |
776 | const struct of_device_id *of_match_table, |
777 | const struct of_device_id **of_id) | |
68c6b148 RW |
778 | { |
779 | const union acpi_object *of_compatible, *obj; | |
780 | int i, nval; | |
781 | ||
782 | if (!adev) | |
783 | return false; | |
784 | ||
785 | of_compatible = adev->data.of_compatible; | |
786 | if (!of_match_table || !of_compatible) | |
787 | return false; | |
788 | ||
789 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
790 | nval = of_compatible->package.count; | |
791 | obj = of_compatible->package.elements; | |
792 | } else { /* Must be ACPI_TYPE_STRING. */ | |
793 | nval = 1; | |
794 | obj = of_compatible; | |
795 | } | |
796 | /* Now we can look for the driver DT compatible strings */ | |
797 | for (i = 0; i < nval; i++, obj++) { | |
798 | const struct of_device_id *id; | |
799 | ||
800 | for (id = of_match_table; id->compatible[0]; id++) | |
4222f38c AS |
801 | if (!strcasecmp(obj->string.pointer, id->compatible)) { |
802 | if (of_id) | |
803 | *of_id = id; | |
68c6b148 | 804 | return true; |
4222f38c | 805 | } |
68c6b148 RW |
806 | } |
807 | ||
808 | return false; | |
809 | } | |
810 | ||
51ede5d9 DD |
811 | static bool acpi_of_modalias(struct acpi_device *adev, |
812 | char *modalias, size_t len) | |
813 | { | |
814 | const union acpi_object *of_compatible; | |
815 | const union acpi_object *obj; | |
816 | const char *str, *chr; | |
817 | ||
818 | of_compatible = adev->data.of_compatible; | |
819 | if (!of_compatible) | |
820 | return false; | |
821 | ||
822 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
823 | obj = of_compatible->package.elements; | |
824 | else /* Must be ACPI_TYPE_STRING. */ | |
825 | obj = of_compatible; | |
826 | ||
827 | str = obj->string.pointer; | |
828 | chr = strchr(str, ','); | |
b75d2cd0 | 829 | strscpy(modalias, chr ? chr + 1 : str, len); |
51ede5d9 DD |
830 | |
831 | return true; | |
832 | } | |
833 | ||
834 | /** | |
835 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
836 | * @adev: ACPI device object to match | |
837 | * @default_id: ID string to use as default if no compatible string found | |
838 | * @modalias: Pointer to buffer that modalias value will be copied into | |
839 | * @len: Length of modalias buffer | |
840 | * | |
673aa1ed MR |
841 | * This is a counterpart of of_alias_from_compatible() for struct acpi_device |
842 | * objects. If there is a compatible string for @adev, it will be copied to | |
843 | * @modalias with the vendor prefix stripped; otherwise, @default_id will be | |
844 | * used. | |
51ede5d9 DD |
845 | */ |
846 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
847 | char *modalias, size_t len) | |
848 | { | |
849 | if (!acpi_of_modalias(adev, modalias, len)) | |
b75d2cd0 | 850 | strscpy(modalias, default_id, len); |
51ede5d9 DD |
851 | } |
852 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
853 | ||
68c6b148 RW |
854 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
855 | struct acpi_hardware_id *hwid) | |
856 | { | |
857 | int i, msk, byte_shift; | |
858 | char buf[3]; | |
859 | ||
860 | if (!id->cls) | |
861 | return false; | |
862 | ||
863 | /* Apply class-code bitmask, before checking each class-code byte */ | |
864 | for (i = 1; i <= 3; i++) { | |
865 | byte_shift = 8 * (3 - i); | |
866 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
867 | if (!msk) | |
868 | continue; | |
869 | ||
870 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
871 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
872 | return false; | |
873 | } | |
874 | return true; | |
875 | } | |
876 | ||
86fca926 | 877 | static bool __acpi_match_device(const struct acpi_device *device, |
4222f38c AS |
878 | const struct acpi_device_id *acpi_ids, |
879 | const struct of_device_id *of_ids, | |
880 | const struct acpi_device_id **acpi_id, | |
881 | const struct of_device_id **of_id) | |
68c6b148 RW |
882 | { |
883 | const struct acpi_device_id *id; | |
884 | struct acpi_hardware_id *hwid; | |
885 | ||
886 | /* | |
887 | * If the device is not present, it is unnecessary to load device | |
888 | * driver for it. | |
889 | */ | |
890 | if (!device || !device->status.present) | |
4222f38c | 891 | return false; |
68c6b148 RW |
892 | |
893 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
894 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
4222f38c AS |
895 | if (acpi_ids) { |
896 | for (id = acpi_ids; id->id[0] || id->cls; id++) { | |
897 | if (id->id[0] && !strcmp((char *)id->id, hwid->id)) | |
898 | goto out_acpi_match; | |
899 | if (id->cls && __acpi_match_device_cls(id, hwid)) | |
900 | goto out_acpi_match; | |
901 | } | |
68c6b148 RW |
902 | } |
903 | ||
904 | /* | |
905 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
906 | * "compatible" property if found. | |
68c6b148 | 907 | */ |
4222f38c AS |
908 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) |
909 | return acpi_of_match_device(device, of_ids, of_id); | |
68c6b148 | 910 | } |
4222f38c AS |
911 | return false; |
912 | ||
913 | out_acpi_match: | |
914 | if (acpi_id) | |
915 | *acpi_id = id; | |
916 | return true; | |
68c6b148 RW |
917 | } |
918 | ||
2b5ae960 AS |
919 | /** |
920 | * acpi_match_acpi_device - Match an ACPI device against a given list of ACPI IDs | |
921 | * @ids: Array of struct acpi_device_id objects to match against. | |
922 | * @adev: The ACPI device pointer to match. | |
923 | * | |
924 | * Match the ACPI device @adev against a given list of ACPI IDs @ids. | |
925 | * | |
926 | * Return: | |
927 | * a pointer to the first matching ACPI ID on success or %NULL on failure. | |
928 | */ | |
929 | const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids, | |
930 | const struct acpi_device *adev) | |
931 | { | |
932 | const struct acpi_device_id *id = NULL; | |
933 | ||
934 | __acpi_match_device(adev, ids, NULL, &id, NULL); | |
935 | return id; | |
936 | } | |
937 | EXPORT_SYMBOL_GPL(acpi_match_acpi_device); | |
938 | ||
68c6b148 RW |
939 | /** |
940 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
941 | * @ids: Array of struct acpi_device_id object to match against. | |
942 | * @dev: The device structure to match. | |
943 | * | |
944 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
945 | * object for that handle and use that object to match against a given list of | |
946 | * device IDs. | |
947 | * | |
948 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
949 | */ | |
950 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
951 | const struct device *dev) | |
952 | { | |
2b5ae960 | 953 | return acpi_match_acpi_device(ids, acpi_companion_match(dev)); |
68c6b148 RW |
954 | } |
955 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
956 | ||
886ca88b AS |
957 | static const void *acpi_of_device_get_match_data(const struct device *dev) |
958 | { | |
959 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
960 | const struct of_device_id *match = NULL; | |
961 | ||
962 | if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match)) | |
963 | return NULL; | |
964 | ||
965 | return match->data; | |
966 | } | |
967 | ||
67dcc26d | 968 | const void *acpi_device_get_match_data(const struct device *dev) |
80212a16 | 969 | { |
fe79e392 | 970 | const struct acpi_device_id *acpi_ids = dev->driver->acpi_match_table; |
80212a16 SK |
971 | const struct acpi_device_id *match; |
972 | ||
fe79e392 | 973 | if (!acpi_ids) |
886ca88b AS |
974 | return acpi_of_device_get_match_data(dev); |
975 | ||
fe79e392 | 976 | match = acpi_match_device(acpi_ids, dev); |
80212a16 SK |
977 | if (!match) |
978 | return NULL; | |
979 | ||
67dcc26d | 980 | return (const void *)match->driver_data; |
80212a16 | 981 | } |
29d5325a | 982 | EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a16 | 983 | |
68c6b148 RW |
984 | int acpi_match_device_ids(struct acpi_device *device, |
985 | const struct acpi_device_id *ids) | |
986 | { | |
4222f38c | 987 | return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148 RW |
988 | } |
989 | EXPORT_SYMBOL(acpi_match_device_ids); | |
990 | ||
991 | bool acpi_driver_match_device(struct device *dev, | |
992 | const struct device_driver *drv) | |
993 | { | |
fe79e392 AS |
994 | const struct acpi_device_id *acpi_ids = drv->acpi_match_table; |
995 | const struct of_device_id *of_ids = drv->of_match_table; | |
68c6b148 | 996 | |
fe79e392 AS |
997 | if (!acpi_ids) |
998 | return acpi_of_match_device(ACPI_COMPANION(dev), of_ids, NULL); | |
999 | ||
1000 | return __acpi_match_device(acpi_companion_match(dev), acpi_ids, of_ids, NULL, NULL); | |
68c6b148 RW |
1001 | } |
1002 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
1003 | ||
5894b0c4 RW |
1004 | /* -------------------------------------------------------------------------- |
1005 | ACPI Driver Management | |
1006 | -------------------------------------------------------------------------- */ | |
1007 | ||
1008 | /** | |
48b9c486 | 1009 | * __acpi_bus_register_driver - register a driver with the ACPI bus |
5894b0c4 | 1010 | * @driver: driver being registered |
48b9c486 | 1011 | * @owner: owning module/driver |
5894b0c4 RW |
1012 | * |
1013 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1014 | * devices that match the driver's criteria and binds. Returns zero for | |
1015 | * success or a negative error status for failure. | |
1016 | */ | |
48b9c486 | 1017 | int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner) |
5894b0c4 | 1018 | { |
5894b0c4 RW |
1019 | if (acpi_disabled) |
1020 | return -ENODEV; | |
1021 | driver->drv.name = driver->name; | |
1022 | driver->drv.bus = &acpi_bus_type; | |
48b9c486 | 1023 | driver->drv.owner = owner; |
5894b0c4 | 1024 | |
4b76dfbc | 1025 | return driver_register(&driver->drv); |
5894b0c4 RW |
1026 | } |
1027 | ||
48b9c486 | 1028 | EXPORT_SYMBOL(__acpi_bus_register_driver); |
5894b0c4 RW |
1029 | |
1030 | /** | |
1031 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
1032 | * @driver: driver to unregister | |
1033 | * | |
1034 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1035 | * devices that match the driver's criteria and unbinds. | |
1036 | */ | |
1037 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1038 | { | |
1039 | driver_unregister(&driver->drv); | |
1040 | } | |
1041 | ||
1042 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1043 | ||
1044 | /* -------------------------------------------------------------------------- | |
1045 | ACPI Bus operations | |
1046 | -------------------------------------------------------------------------- */ | |
1047 | ||
1048 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
1049 | { | |
1050 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1051 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1052 | ||
1053 | return acpi_dev->flags.match_driver | |
1054 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
1055 | } | |
1056 | ||
2a81ada3 | 1057 | static int acpi_device_uevent(const struct device *dev, struct kobj_uevent_env *env) |
5894b0c4 RW |
1058 | { |
1059 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
1060 | } | |
1061 | ||
1062 | static int acpi_device_probe(struct device *dev) | |
1063 | { | |
1064 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1065 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1066 | int ret; | |
1067 | ||
1068 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
1069 | return -EINVAL; | |
1070 | ||
1071 | if (!acpi_drv->ops.add) | |
1072 | return -ENOSYS; | |
1073 | ||
1074 | ret = acpi_drv->ops.add(acpi_dev); | |
0d167101 MW |
1075 | if (ret) { |
1076 | acpi_dev->driver_data = NULL; | |
5894b0c4 | 1077 | return ret; |
0d167101 | 1078 | } |
5894b0c4 | 1079 | |
ee98460b RW |
1080 | pr_debug("Driver [%s] successfully bound to device [%s]\n", |
1081 | acpi_drv->name, acpi_dev->pnp.bus_id); | |
5894b0c4 RW |
1082 | |
1083 | if (acpi_drv->ops.notify) { | |
c56610a8 | 1084 | ret = acpi_device_install_notify_handler(acpi_dev, acpi_drv); |
5894b0c4 RW |
1085 | if (ret) { |
1086 | if (acpi_drv->ops.remove) | |
1087 | acpi_drv->ops.remove(acpi_dev); | |
1088 | ||
5894b0c4 RW |
1089 | acpi_dev->driver_data = NULL; |
1090 | return ret; | |
1091 | } | |
1092 | } | |
1093 | ||
ee98460b RW |
1094 | pr_debug("Found driver [%s] for device [%s]\n", acpi_drv->name, |
1095 | acpi_dev->pnp.bus_id); | |
1096 | ||
5894b0c4 RW |
1097 | get_device(dev); |
1098 | return 0; | |
1099 | } | |
1100 | ||
fc7a6209 | 1101 | static void acpi_device_remove(struct device *dev) |
5894b0c4 RW |
1102 | { |
1103 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
d6fb6ee1 | 1104 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
5894b0c4 | 1105 | |
e5ed878d | 1106 | if (acpi_drv->ops.notify) |
c56610a8 | 1107 | acpi_device_remove_notify_handler(acpi_dev, acpi_drv); |
e5ed878d UKK |
1108 | |
1109 | if (acpi_drv->ops.remove) | |
1110 | acpi_drv->ops.remove(acpi_dev); | |
5894b0c4 | 1111 | |
5894b0c4 RW |
1112 | acpi_dev->driver_data = NULL; |
1113 | ||
1114 | put_device(dev); | |
5894b0c4 RW |
1115 | } |
1116 | ||
592190b5 | 1117 | const struct bus_type acpi_bus_type = { |
5894b0c4 RW |
1118 | .name = "acpi", |
1119 | .match = acpi_bus_match, | |
1120 | .probe = acpi_device_probe, | |
1121 | .remove = acpi_device_remove, | |
1122 | .uevent = acpi_device_uevent, | |
1123 | }; | |
3c36fe93 RW |
1124 | |
1125 | int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data) | |
1126 | { | |
1127 | return bus_for_each_dev(&acpi_bus_type, NULL, data, fn); | |
1128 | } | |
1129 | EXPORT_SYMBOL_GPL(acpi_bus_for_each_dev); | |
5894b0c4 | 1130 | |
10fa1b2c RW |
1131 | struct acpi_dev_walk_context { |
1132 | int (*fn)(struct acpi_device *, void *); | |
1133 | void *data; | |
1134 | }; | |
1135 | ||
1136 | static int acpi_dev_for_one_check(struct device *dev, void *context) | |
1137 | { | |
1138 | struct acpi_dev_walk_context *adwc = context; | |
1139 | ||
1140 | if (dev->bus != &acpi_bus_type) | |
1141 | return 0; | |
1142 | ||
1143 | return adwc->fn(to_acpi_device(dev), adwc->data); | |
1144 | } | |
f8128c39 | 1145 | EXPORT_SYMBOL_GPL(acpi_dev_for_each_child); |
10fa1b2c | 1146 | |
cf6ba075 | 1147 | int acpi_dev_for_each_child(struct acpi_device *adev, |
10fa1b2c | 1148 | int (*fn)(struct acpi_device *, void *), void *data) |
cf6ba075 | 1149 | { |
10fa1b2c RW |
1150 | struct acpi_dev_walk_context adwc = { |
1151 | .fn = fn, | |
1152 | .data = data, | |
1153 | }; | |
1154 | ||
1155 | return device_for_each_child(&adev->dev, &adwc, acpi_dev_for_one_check); | |
cf6ba075 RW |
1156 | } |
1157 | ||
ff32e599 RW |
1158 | int acpi_dev_for_each_child_reverse(struct acpi_device *adev, |
1159 | int (*fn)(struct acpi_device *, void *), | |
1160 | void *data) | |
1161 | { | |
1162 | struct acpi_dev_walk_context adwc = { | |
1163 | .fn = fn, | |
1164 | .data = data, | |
1165 | }; | |
1166 | ||
1167 | return device_for_each_child_reverse(&adev->dev, &adwc, acpi_dev_for_one_check); | |
1168 | } | |
1169 | ||
1da177e4 LT |
1170 | /* -------------------------------------------------------------------------- |
1171 | Initialization/Cleanup | |
1172 | -------------------------------------------------------------------------- */ | |
1173 | ||
4be44fcd | 1174 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 1175 | { |
6a8c0af6 | 1176 | acpi_status status; |
4be44fcd | 1177 | char *message = NULL; |
1da177e4 | 1178 | |
1da177e4 | 1179 | |
aafbcd16 | 1180 | /* |
1da177e4 LT |
1181 | * Let the system know what interrupt model we are using by |
1182 | * evaluating the \_PIC object, if exists. | |
1183 | */ | |
1184 | ||
1185 | switch (acpi_irq_model) { | |
1186 | case ACPI_IRQ_MODEL_PIC: | |
1187 | message = "PIC"; | |
1188 | break; | |
1189 | case ACPI_IRQ_MODEL_IOAPIC: | |
1190 | message = "IOAPIC"; | |
1191 | break; | |
1192 | case ACPI_IRQ_MODEL_IOSAPIC: | |
1193 | message = "IOSAPIC"; | |
1194 | break; | |
fbe61ec7 HG |
1195 | case ACPI_IRQ_MODEL_GIC: |
1196 | message = "GIC"; | |
1197 | break; | |
3948ec94 JK |
1198 | case ACPI_IRQ_MODEL_PLATFORM: |
1199 | message = "platform specific model"; | |
1200 | break; | |
e8bba72b JL |
1201 | case ACPI_IRQ_MODEL_LPIC: |
1202 | message = "LPIC"; | |
1203 | break; | |
1da177e4 | 1204 | default: |
ee98460b | 1205 | pr_info("Unknown interrupt routing model\n"); |
d550d98d | 1206 | return -ENODEV; |
1da177e4 LT |
1207 | } |
1208 | ||
ee98460b | 1209 | pr_info("Using %s for interrupt routing\n", message); |
1da177e4 | 1210 | |
0db98202 | 1211 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 1212 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
ee98460b | 1213 | pr_info("_PIC evaluation failed: %s\n", acpi_format_exception(status)); |
d550d98d | 1214 | return -ENODEV; |
1da177e4 LT |
1215 | } |
1216 | ||
d550d98d | 1217 | return 0; |
1da177e4 LT |
1218 | } |
1219 | ||
b064a8fa RW |
1220 | /** |
1221 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1222 | * | |
1223 | * The ACPI tables are accessible after this, but the handling of events has not | |
1224 | * been initialized and the global lock is not available yet, so AML should not | |
1225 | * be executed at this point. | |
1226 | * | |
1227 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1228 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1229 | */ | |
4be44fcd | 1230 | void __init acpi_early_init(void) |
1da177e4 | 1231 | { |
6a8c0af6 | 1232 | acpi_status status; |
1da177e4 LT |
1233 | |
1234 | if (acpi_disabled) | |
d550d98d | 1235 | return; |
1da177e4 | 1236 | |
ee98460b | 1237 | pr_info("Core revision %08x\n", ACPI_CA_VERSION); |
61686124 | 1238 | |
1da177e4 LT |
1239 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1240 | if (!acpi_strict) | |
1241 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1242 | ||
8d3523fb | 1243 | acpi_permanent_mmap = true; |
ad71860a | 1244 | |
5d128fbd | 1245 | #ifdef CONFIG_X86 |
ae976358 KHF |
1246 | /* |
1247 | * If the machine falls into the DMI check table, | |
5d128fbd JD |
1248 | * DSDT will be copied to memory. |
1249 | * Note that calling dmi_check_system() here on other architectures | |
1250 | * would not be OK because only x86 initializes dmi early enough. | |
1251 | * Thankfully only x86 systems need such quirks for now. | |
ae976358 KHF |
1252 | */ |
1253 | dmi_check_system(dsdt_dmi_table); | |
5d128fbd | 1254 | #endif |
aa2110cb | 1255 | |
ad71860a AS |
1256 | status = acpi_reallocate_root_table(); |
1257 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1258 | pr_err("Unable to reallocate ACPI tables\n"); |
ad71860a AS |
1259 | goto error0; |
1260 | } | |
1261 | ||
1da177e4 LT |
1262 | status = acpi_initialize_subsystem(); |
1263 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1264 | pr_err("Unable to initialize the ACPI Interpreter\n"); |
1da177e4 LT |
1265 | goto error0; |
1266 | } | |
1267 | ||
1da177e4 LT |
1268 | #ifdef CONFIG_X86 |
1269 | if (!acpi_ioapic) { | |
1da177e4 | 1270 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1271 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1272 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1273 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1274 | } | |
1da177e4 | 1275 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1276 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1277 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1278 | } else { |
1da177e4 | 1279 | /* |
cee324b1 | 1280 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1281 | * update it with result from INT_SRC_OVR parsing |
1282 | */ | |
cee324b1 | 1283 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1284 | } |
1285 | #endif | |
b064a8fa RW |
1286 | return; |
1287 | ||
1288 | error0: | |
1289 | disable_acpi(); | |
1290 | } | |
1291 | ||
1292 | /** | |
1293 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1294 | * | |
3af03f77 | 1295 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1296 | * |
1297 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1298 | * done before all things that really depend on ACPI. The right spot appears to | |
1299 | * be before finalizing the EFI initialization. | |
1300 | */ | |
1301 | void __init acpi_subsystem_init(void) | |
1302 | { | |
1303 | acpi_status status; | |
1304 | ||
1305 | if (acpi_disabled) | |
1306 | return; | |
1da177e4 | 1307 | |
4505a201 | 1308 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 | 1309 | if (ACPI_FAILURE(status)) { |
ee98460b | 1310 | pr_err("Unable to enable ACPI\n"); |
b064a8fa RW |
1311 | disable_acpi(); |
1312 | } else { | |
1313 | /* | |
1314 | * If the system is using ACPI then we can be reasonably | |
1315 | * confident that any regulators are managed by the firmware | |
1316 | * so tell the regulator core it has everything it needs to | |
1317 | * know. | |
1318 | */ | |
1319 | regulator_has_full_constraints(); | |
1da177e4 | 1320 | } |
1da177e4 LT |
1321 | } |
1322 | ||
68bdb677 OP |
1323 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1324 | { | |
8d287e82 RW |
1325 | if (event == ACPI_TABLE_EVENT_LOAD) |
1326 | acpi_scan_table_notify(); | |
68bdb677 OP |
1327 | |
1328 | return acpi_sysfs_table_handler(event, table, context); | |
1329 | } | |
1330 | ||
4be44fcd | 1331 | static int __init acpi_bus_init(void) |
1da177e4 | 1332 | { |
6a8c0af6 BH |
1333 | int result; |
1334 | acpi_status status; | |
1da177e4 | 1335 | |
176f9c18 | 1336 | acpi_os_initialize1(); |
1da177e4 | 1337 | |
d737f333 ES |
1338 | status = acpi_load_tables(); |
1339 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1340 | pr_err("Unable to load the System Description Tables\n"); |
d737f333 | 1341 | goto error1; |
fe6cbea0 LZ |
1342 | } |
1343 | ||
b1c03308 RW |
1344 | /* |
1345 | * ACPI 2.0 requires the EC driver to be loaded and work before the EC | |
1346 | * device is found in the namespace. | |
1347 | * | |
1348 | * This is accomplished by looking for the ECDT table and getting the EC | |
1349 | * parameters out of that. | |
1350 | * | |
1351 | * Do that before calling acpi_initialize_objects() which may trigger EC | |
1352 | * address space accesses. | |
1353 | */ | |
1354 | acpi_ec_ecdt_probe(); | |
1355 | ||
fe6cbea0 LZ |
1356 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1357 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1358 | pr_err("Unable to start the ACPI Interpreter\n"); |
fe6cbea0 LZ |
1359 | goto error1; |
1360 | } | |
1361 | ||
1da177e4 LT |
1362 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1363 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1364 | pr_err("Unable to initialize ACPI objects\n"); |
1da177e4 LT |
1365 | goto error1; |
1366 | } | |
1367 | ||
fc54ab72 LM |
1368 | /* |
1369 | * _OSC method may exist in module level code, | |
1370 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1371 | */ | |
719e1f56 | 1372 | acpi_bus_osc_negotiate_platform_control(); |
5a6a2c0f | 1373 | acpi_bus_osc_negotiate_usb_control(); |
fc54ab72 | 1374 | |
b1d248d9 ZR |
1375 | /* |
1376 | * _PDC control method may load dynamic SSDT tables, | |
1377 | * and we need to install the table handler before that. | |
1378 | */ | |
68bdb677 OP |
1379 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1380 | ||
b1d248d9 ZR |
1381 | acpi_sysfs_init(); |
1382 | ||
95272641 | 1383 | acpi_early_processor_control_setup(); |
78f16996 | 1384 | |
455c8793 ZY |
1385 | /* |
1386 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1387 | * is necessary to enable it as early as possible. | |
1388 | */ | |
dcf15cbd | 1389 | acpi_ec_dsdt_probe(); |
455c8793 | 1390 | |
ee98460b | 1391 | pr_info("Interpreter enabled\n"); |
1da177e4 | 1392 | |
aafbcd16 AS |
1393 | /* Initialize sleep structures */ |
1394 | acpi_sleep_init(); | |
1395 | ||
1da177e4 LT |
1396 | /* |
1397 | * Get the system interrupt model and evaluate \_PIC. | |
1398 | */ | |
1399 | result = acpi_bus_init_irq(); | |
1400 | if (result) | |
1401 | goto error1; | |
1402 | ||
1403 | /* | |
1404 | * Register the for all standard device notifications. | |
1405 | */ | |
4be44fcd LB |
1406 | status = |
1407 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1408 | &acpi_bus_notify, NULL); | |
1da177e4 | 1409 | if (ACPI_FAILURE(status)) { |
ee98460b | 1410 | pr_err("Unable to register for system notifications\n"); |
1da177e4 LT |
1411 | goto error1; |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * Create the top ACPI proc directory | |
1416 | */ | |
1417 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1418 | ||
1dcc3d33 RW |
1419 | result = bus_register(&acpi_bus_type); |
1420 | if (!result) | |
1421 | return 0; | |
1da177e4 LT |
1422 | |
1423 | /* Mimic structured exception handling */ | |
4be44fcd | 1424 | error1: |
1da177e4 | 1425 | acpi_terminate(); |
d550d98d | 1426 | return -ENODEV; |
1da177e4 LT |
1427 | } |
1428 | ||
99e0d2fc | 1429 | struct kobject *acpi_kobj; |
f2d4753f | 1430 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1431 | |
4be44fcd | 1432 | static int __init acpi_init(void) |
1da177e4 | 1433 | { |
6831c6ed | 1434 | int result; |
1da177e4 | 1435 | |
1da177e4 | 1436 | if (acpi_disabled) { |
ee98460b | 1437 | pr_info("Interpreter disabled.\n"); |
d550d98d | 1438 | return -ENODEV; |
1da177e4 LT |
1439 | } |
1440 | ||
f62ed9e3 | 1441 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
9b645601 | 1442 | if (!acpi_kobj) |
ee98460b | 1443 | pr_debug("%s: kset create error\n", __func__); |
1da177e4 | 1444 | |
cefc7ca4 | 1445 | init_prmt(); |
77e2a047 | 1446 | acpi_init_pcc(); |
1da177e4 | 1447 | result = acpi_bus_init(); |
6831c6ed | 1448 | if (result) { |
4ac7a817 | 1449 | kobject_put(acpi_kobj); |
1da177e4 | 1450 | disable_acpi(); |
81d0273d | 1451 | return result; |
6831c6ed | 1452 | } |
d7d43321 | 1453 | acpi_init_ffh(); |
81d0273d | 1454 | |
6831c6ed | 1455 | pci_mmcfg_late_init(); |
3dcb861d | 1456 | acpi_viot_early_init(); |
dc4e8c07 | 1457 | acpi_hest_init(); |
27e932a3 | 1458 | acpi_ghes_init(); |
d5921c46 | 1459 | acpi_arm_init(); |
e747f274 | 1460 | acpi_scan_init(); |
a5f820fe | 1461 | acpi_ec_init(); |
a25ee920 | 1462 | acpi_debugfs_init(); |
9cee43e0 | 1463 | acpi_sleep_proc_init(); |
201b8c65 | 1464 | acpi_wakeup_device_init(); |
836d0830 | 1465 | acpi_debugger_init(); |
baa0c019 | 1466 | acpi_setup_sb_notify_handler(); |
3cf48554 | 1467 | acpi_viot_init(); |
6831c6ed | 1468 | return 0; |
1da177e4 LT |
1469 | } |
1470 | ||
1471 | subsys_initcall(acpi_init); |