Commit | Line | Data |
---|---|---|
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; | |
face1c54 AW |
332 | if (IS_ENABLED(CONFIG_ACPI_BATTERY)) |
333 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_BATTERY_CHARGE_LIMITING_SUPPORT; | |
eccddd32 | 334 | |
b938a229 | 335 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 336 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
6e8345f2 | 337 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_OVER_16_PSTATES_SUPPORT; |
a8a967a2 | 338 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GED_SUPPORT; |
403ad17c | 339 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_IRQ_RESOURCE_SOURCE_SUPPORT; |
392ed6a7 AL |
340 | if (IS_ENABLED(CONFIG_ACPI_PRMT)) |
341 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT; | |
d7d43321 SH |
342 | if (IS_ENABLED(CONFIG_ACPI_FFH)) |
343 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_FFH_OPR_SUPPORT; | |
c2f4191a | 344 | |
01aabca2 JC |
345 | #ifdef CONFIG_ARM64 |
346 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; | |
347 | #endif | |
5c2832e9 | 348 | #ifdef CONFIG_X86 |
01aabca2 | 349 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; |
5c2832e9 SP |
350 | #endif |
351 | ||
72f2ecb7 PG |
352 | #ifdef CONFIG_ACPI_CPPC_LIB |
353 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
354 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
5c2832e9 SP |
355 | #endif |
356 | ||
0651ab90 PG |
357 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_FLEXIBLE_ADR_SPACE; |
358 | ||
de966cf4 | 359 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
360 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
361 | ||
5a6a2c0f MW |
362 | if (IS_ENABLED(CONFIG_USB4)) |
363 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_NATIVE_USB4_SUPPORT; | |
364 | ||
eccddd32 | 365 | if (!ghes_disable) |
b938a229 | 366 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
367 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
368 | return; | |
719e1f56 ML |
369 | |
370 | if (ACPI_FAILURE(acpi_run_osc(handle, &context))) | |
371 | return; | |
372 | ||
2ca8e628 RW |
373 | capbuf_ret = context.ret.pointer; |
374 | if (context.ret.length <= OSC_SUPPORT_DWORD) { | |
375 | kfree(context.ret.pointer); | |
376 | return; | |
377 | } | |
719e1f56 | 378 | |
2ca8e628 RW |
379 | /* |
380 | * Now run _OSC again with query flag clear and with the caps | |
381 | * supported by both the OS and the platform. | |
382 | */ | |
719e1f56 | 383 | capbuf[OSC_QUERY_DWORD] = 0; |
2ca8e628 RW |
384 | capbuf[OSC_SUPPORT_DWORD] = capbuf_ret[OSC_SUPPORT_DWORD]; |
385 | kfree(context.ret.pointer); | |
719e1f56 ML |
386 | |
387 | if (ACPI_FAILURE(acpi_run_osc(handle, &context))) | |
388 | return; | |
389 | ||
390 | capbuf_ret = context.ret.pointer; | |
2ca8e628 | 391 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
7feec743 ML |
392 | #ifdef CONFIG_ACPI_CPPC_LIB |
393 | osc_sb_cppc2_support_acked = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_CPCV2_SUPPORT; | |
394 | #endif | |
395 | ||
2ca8e628 RW |
396 | osc_sb_apei_support_acked = |
397 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; | |
398 | osc_pc_lpi_support_confirmed = | |
399 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
400 | osc_sb_native_usb4_support_confirmed = | |
401 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_NATIVE_USB4_SUPPORT; | |
0651ab90 PG |
402 | osc_cpc_flexible_adr_space_confirmed = |
403 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_CPC_FLEXIBLE_ADR_SPACE; | |
2ca8e628 | 404 | } |
5a6a2c0f MW |
405 | |
406 | kfree(context.ret.pointer); | |
407 | } | |
408 | ||
409 | /* | |
410 | * Native control of USB4 capabilities. If any of the tunneling bits is | |
411 | * set it means OS is in control and we use software based connection | |
412 | * manager. | |
413 | */ | |
414 | u32 osc_sb_native_usb4_control; | |
415 | EXPORT_SYMBOL_GPL(osc_sb_native_usb4_control); | |
416 | ||
417 | static void acpi_bus_decode_usb_osc(const char *msg, u32 bits) | |
418 | { | |
8e173cbb | 419 | pr_info("%s USB3%c DisplayPort%c PCIe%c XDomain%c\n", msg, |
5a6a2c0f MW |
420 | (bits & OSC_USB_USB3_TUNNELING) ? '+' : '-', |
421 | (bits & OSC_USB_DP_TUNNELING) ? '+' : '-', | |
422 | (bits & OSC_USB_PCIE_TUNNELING) ? '+' : '-', | |
423 | (bits & OSC_USB_XDOMAIN) ? '+' : '-'); | |
424 | } | |
425 | ||
426 | static u8 sb_usb_uuid_str[] = "23A0D13A-26AB-486C-9C5F-0FFA525A575A"; | |
427 | static void acpi_bus_osc_negotiate_usb_control(void) | |
428 | { | |
6d392d8d | 429 | u32 capbuf[3], *capbuf_ret; |
5a6a2c0f MW |
430 | struct acpi_osc_context context = { |
431 | .uuid_str = sb_usb_uuid_str, | |
432 | .rev = 1, | |
433 | .cap.length = sizeof(capbuf), | |
434 | .cap.pointer = capbuf, | |
435 | }; | |
436 | acpi_handle handle; | |
437 | acpi_status status; | |
438 | u32 control; | |
439 | ||
440 | if (!osc_sb_native_usb4_support_confirmed) | |
441 | return; | |
442 | ||
443 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) | |
444 | return; | |
445 | ||
446 | control = OSC_USB_USB3_TUNNELING | OSC_USB_DP_TUNNELING | | |
447 | OSC_USB_PCIE_TUNNELING | OSC_USB_XDOMAIN; | |
448 | ||
6d392d8d MW |
449 | /* |
450 | * Run _OSC first with query bit set, trying to get control over | |
451 | * all tunneling. The platform can then clear out bits in the | |
452 | * control dword that it does not want to grant to the OS. | |
453 | */ | |
454 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; | |
5a6a2c0f MW |
455 | capbuf[OSC_SUPPORT_DWORD] = 0; |
456 | capbuf[OSC_CONTROL_DWORD] = control; | |
457 | ||
458 | status = acpi_run_osc(handle, &context); | |
459 | if (ACPI_FAILURE(status)) | |
460 | return; | |
461 | ||
462 | if (context.ret.length != sizeof(capbuf)) { | |
8e173cbb | 463 | pr_info("USB4 _OSC: returned invalid length buffer\n"); |
5a6a2c0f | 464 | goto out_free; |
719e1f56 ML |
465 | } |
466 | ||
6d392d8d MW |
467 | /* |
468 | * Run _OSC again now with query bit clear and the control dword | |
469 | * matching what the platform granted (which may not have all | |
470 | * the control bits set). | |
471 | */ | |
472 | capbuf_ret = context.ret.pointer; | |
473 | ||
474 | capbuf[OSC_QUERY_DWORD] = 0; | |
475 | capbuf[OSC_CONTROL_DWORD] = capbuf_ret[OSC_CONTROL_DWORD]; | |
476 | ||
477 | kfree(context.ret.pointer); | |
478 | ||
479 | status = acpi_run_osc(handle, &context); | |
480 | if (ACPI_FAILURE(status)) | |
481 | return; | |
482 | ||
483 | if (context.ret.length != sizeof(capbuf)) { | |
484 | pr_info("USB4 _OSC: returned invalid length buffer\n"); | |
485 | goto out_free; | |
486 | } | |
487 | ||
5a6a2c0f | 488 | osc_sb_native_usb4_control = |
6d392d8d | 489 | control & acpi_osc_ctx_get_pci_control(&context); |
5a6a2c0f MW |
490 | |
491 | acpi_bus_decode_usb_osc("USB4 _OSC: OS supports", control); | |
492 | acpi_bus_decode_usb_osc("USB4 _OSC: OS controls", | |
493 | osc_sb_native_usb4_control); | |
494 | ||
495 | out_free: | |
719e1f56 | 496 | kfree(context.ret.pointer); |
3563ff96 SL |
497 | } |
498 | ||
1da177e4 LT |
499 | /* -------------------------------------------------------------------------- |
500 | Notification Handling | |
501 | -------------------------------------------------------------------------- */ | |
502 | ||
c56610a8 RW |
503 | /** |
504 | * acpi_bus_notify - Global system-level (0x00-0x7F) notifications handler | |
505 | * @handle: Target ACPI object. | |
506 | * @type: Notification type. | |
507 | * @data: Ignored. | |
508 | * | |
509 | * This only handles notifications related to device hotplug. | |
1da177e4 | 510 | */ |
4be44fcd | 511 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 512 | { |
1a699476 | 513 | struct acpi_device *adev; |
02c37bd8 | 514 | |
1da177e4 | 515 | switch (type) { |
1da177e4 | 516 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 517 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
1da177e4 LT |
518 | break; |
519 | ||
520 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 521 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
1da177e4 LT |
522 | break; |
523 | ||
524 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 525 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
c56610a8 | 526 | return; |
1da177e4 LT |
527 | |
528 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 529 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
1da177e4 LT |
530 | break; |
531 | ||
532 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 533 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 | 534 | /* TBD: Exactly what does 'light' mean? */ |
c56610a8 | 535 | return; |
1da177e4 LT |
536 | |
537 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
538 | acpi_handle_err(handle, "Device cannot be configured due " |
539 | "to a frequency mismatch\n"); | |
c56610a8 | 540 | return; |
1da177e4 LT |
541 | |
542 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
543 | acpi_handle_err(handle, "Device cannot be configured due " |
544 | "to a bus mode mismatch\n"); | |
c56610a8 | 545 | return; |
1da177e4 LT |
546 | |
547 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 548 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
c56610a8 | 549 | return; |
1da177e4 LT |
550 | |
551 | default: | |
f66abe92 | 552 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
c56610a8 | 553 | return; |
1da177e4 LT |
554 | } |
555 | ||
45e9aa1f | 556 | adev = acpi_get_acpi_dev(handle); |
9a4d8d60 | 557 | |
c56610a8 | 558 | if (adev && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
d0103387 RW |
559 | return; |
560 | ||
45e9aa1f | 561 | acpi_put_acpi_dev(adev); |
1a699476 | 562 | |
c56610a8 | 563 | acpi_evaluate_ost(handle, type, ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); |
1da177e4 LT |
564 | } |
565 | ||
5e557cba | 566 | static void acpi_notify_device(acpi_handle handle, u32 event, void *data) |
5894b0c4 RW |
567 | { |
568 | struct acpi_device *device = data; | |
d6fb6ee1 | 569 | struct acpi_driver *acpi_drv = to_acpi_driver(device->dev.driver); |
5894b0c4 | 570 | |
d6fb6ee1 | 571 | acpi_drv->ops.notify(device, event); |
5894b0c4 RW |
572 | } |
573 | ||
c56610a8 RW |
574 | static int acpi_device_install_notify_handler(struct acpi_device *device, |
575 | struct acpi_driver *acpi_drv) | |
5894b0c4 | 576 | { |
365eac5e | 577 | u32 type = acpi_drv->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS ? |
c56610a8 | 578 | ACPI_ALL_NOTIFY : ACPI_DEVICE_NOTIFY; |
365eac5e | 579 | acpi_status status; |
c56610a8 | 580 | |
365eac5e RW |
581 | status = acpi_install_notify_handler(device->handle, type, |
582 | acpi_notify_device, device); | |
5894b0c4 RW |
583 | if (ACPI_FAILURE(status)) |
584 | return -EINVAL; | |
365eac5e | 585 | |
5894b0c4 RW |
586 | return 0; |
587 | } | |
588 | ||
c56610a8 RW |
589 | static void acpi_device_remove_notify_handler(struct acpi_device *device, |
590 | struct acpi_driver *acpi_drv) | |
5894b0c4 | 591 | { |
365eac5e | 592 | u32 type = acpi_drv->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS ? |
c56610a8 RW |
593 | ACPI_ALL_NOTIFY : ACPI_DEVICE_NOTIFY; |
594 | ||
365eac5e RW |
595 | acpi_remove_notify_handler(device->handle, type, |
596 | acpi_notify_device); | |
597 | ||
faae4437 | 598 | acpi_os_wait_events_complete(); |
5894b0c4 RW |
599 | } |
600 | ||
c542ce36 MW |
601 | int acpi_dev_install_notify_handler(struct acpi_device *adev, |
602 | u32 handler_type, | |
470508f6 | 603 | acpi_notify_handler handler, void *context) |
c542ce36 MW |
604 | { |
605 | acpi_status status; | |
606 | ||
607 | status = acpi_install_notify_handler(adev->handle, handler_type, | |
470508f6 | 608 | handler, context); |
c542ce36 MW |
609 | if (ACPI_FAILURE(status)) |
610 | return -ENODEV; | |
611 | ||
612 | return 0; | |
613 | } | |
614 | EXPORT_SYMBOL_GPL(acpi_dev_install_notify_handler); | |
615 | ||
616 | void acpi_dev_remove_notify_handler(struct acpi_device *adev, | |
617 | u32 handler_type, | |
618 | acpi_notify_handler handler) | |
619 | { | |
620 | acpi_remove_notify_handler(adev->handle, handler_type, handler); | |
621 | acpi_os_wait_events_complete(); | |
622 | } | |
623 | EXPORT_SYMBOL_GPL(acpi_dev_remove_notify_handler); | |
624 | ||
baa0c019 PP |
625 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
626 | ||
627 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
628 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
629 | ||
630 | static void sb_notify_work(struct work_struct *dummy) | |
631 | { | |
632 | acpi_handle sb_handle; | |
633 | ||
634 | orderly_poweroff(true); | |
635 | ||
636 | /* | |
637 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
638 | * to evaluate _OST method once every 10seconds to indicate that | |
639 | * the shutdown is in progress | |
640 | */ | |
641 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
642 | while (1) { | |
643 | pr_info("Graceful shutdown in progress.\n"); | |
644 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
645 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
646 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
647 | } | |
648 | } | |
649 | ||
650 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
651 | { | |
652 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
653 | ||
654 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
655 | if (!work_busy(&acpi_sb_work)) | |
656 | schedule_work(&acpi_sb_work); | |
6d572d39 | 657 | } else { |
baa0c019 | 658 | pr_warn("event %x is not supported by \\_SB device\n", event); |
6d572d39 | 659 | } |
baa0c019 PP |
660 | } |
661 | ||
662 | static int __init acpi_setup_sb_notify_handler(void) | |
663 | { | |
664 | acpi_handle sb_handle; | |
665 | ||
666 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
667 | return -ENXIO; | |
668 | ||
669 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
670 | acpi_sb_notify, NULL))) | |
671 | return -EINVAL; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
68c6b148 RW |
676 | /* -------------------------------------------------------------------------- |
677 | Device Matching | |
678 | -------------------------------------------------------------------------- */ | |
679 | ||
3b95bd16 AM |
680 | /** |
681 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
682 | * @adev: ACPI device in question | |
683 | * | |
684 | * Return: First physical node of ACPI device @adev | |
685 | */ | |
686 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
687 | { |
688 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 689 | struct device *phys_dev; |
e91a398c RW |
690 | |
691 | mutex_lock(physical_node_lock); | |
692 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 693 | phys_dev = NULL; |
e91a398c RW |
694 | } else { |
695 | const struct acpi_device_physical_node *node; | |
696 | ||
697 | node = list_first_entry(&adev->physical_node_list, | |
698 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
699 | |
700 | phys_dev = node->dev; | |
e91a398c RW |
701 | } |
702 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
703 | return phys_dev; |
704 | } | |
1c9698f8 | 705 | EXPORT_SYMBOL_GPL(acpi_get_first_physical_node); |
3b95bd16 AM |
706 | |
707 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
708 | const struct device *dev) | |
709 | { | |
710 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
711 | ||
712 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
713 | } |
714 | ||
3431e490 RW |
715 | /** |
716 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
717 | * @adev: ACPI companion device | |
718 | * @dev: Physical device to check | |
719 | * | |
720 | * Function checks if given @dev is the first physical devices attached to | |
721 | * the ACPI companion device. This distinction is needed in some cases | |
722 | * where the same companion device is shared between many physical devices. | |
723 | * | |
724 | * Note that the caller have to provide valid @adev pointer. | |
725 | */ | |
726 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
727 | const struct device *dev) | |
728 | { | |
e91a398c | 729 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
730 | } |
731 | ||
68c6b148 RW |
732 | /* |
733 | * acpi_companion_match() - Can we match via ACPI companion device | |
734 | * @dev: Device in question | |
735 | * | |
736 | * Check if the given device has an ACPI companion and if that companion has | |
737 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
738 | * device associated with it. Return the companion pointer if that's the case | |
739 | * or NULL otherwise. | |
740 | * | |
741 | * If multiple physical devices are attached to a single ACPI companion, we need | |
742 | * to be careful. The usage scenario for this kind of relationship is that all | |
743 | * of the physical devices in question use resources provided by the ACPI | |
744 | * companion. A typical case is an MFD device where all the sub-devices share | |
745 | * the parent's ACPI companion. In such cases we can only allow the primary | |
746 | * (first) physical device to be matched with the help of the companion's PNP | |
747 | * IDs. | |
748 | * | |
749 | * Additional physical devices sharing the ACPI companion can still use | |
750 | * resources available from it but they will be matched normally using functions | |
751 | * provided by their bus types (and analogously for their modalias). | |
752 | */ | |
86fca926 | 753 | const struct acpi_device *acpi_companion_match(const struct device *dev) |
68c6b148 RW |
754 | { |
755 | struct acpi_device *adev; | |
68c6b148 RW |
756 | |
757 | adev = ACPI_COMPANION(dev); | |
758 | if (!adev) | |
759 | return NULL; | |
760 | ||
761 | if (list_empty(&adev->pnp.ids)) | |
762 | return NULL; | |
763 | ||
e91a398c | 764 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
765 | } |
766 | ||
767 | /** | |
768 | * acpi_of_match_device - Match device object using the "compatible" property. | |
769 | * @adev: ACPI device object to match. | |
770 | * @of_match_table: List of device IDs to match against. | |
4222f38c | 771 | * @of_id: OF ID if matched |
68c6b148 RW |
772 | * |
773 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
774 | * identifiers and a _DSD object with the "compatible" property, use that | |
775 | * property to match against the given list of identifiers. | |
776 | */ | |
86fca926 | 777 | static bool acpi_of_match_device(const struct acpi_device *adev, |
4222f38c AS |
778 | const struct of_device_id *of_match_table, |
779 | const struct of_device_id **of_id) | |
68c6b148 RW |
780 | { |
781 | const union acpi_object *of_compatible, *obj; | |
782 | int i, nval; | |
783 | ||
784 | if (!adev) | |
785 | return false; | |
786 | ||
787 | of_compatible = adev->data.of_compatible; | |
788 | if (!of_match_table || !of_compatible) | |
789 | return false; | |
790 | ||
791 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
792 | nval = of_compatible->package.count; | |
793 | obj = of_compatible->package.elements; | |
794 | } else { /* Must be ACPI_TYPE_STRING. */ | |
795 | nval = 1; | |
796 | obj = of_compatible; | |
797 | } | |
798 | /* Now we can look for the driver DT compatible strings */ | |
799 | for (i = 0; i < nval; i++, obj++) { | |
800 | const struct of_device_id *id; | |
801 | ||
802 | for (id = of_match_table; id->compatible[0]; id++) | |
4222f38c AS |
803 | if (!strcasecmp(obj->string.pointer, id->compatible)) { |
804 | if (of_id) | |
805 | *of_id = id; | |
68c6b148 | 806 | return true; |
4222f38c | 807 | } |
68c6b148 RW |
808 | } |
809 | ||
810 | return false; | |
811 | } | |
812 | ||
51ede5d9 DD |
813 | static bool acpi_of_modalias(struct acpi_device *adev, |
814 | char *modalias, size_t len) | |
815 | { | |
816 | const union acpi_object *of_compatible; | |
817 | const union acpi_object *obj; | |
818 | const char *str, *chr; | |
819 | ||
820 | of_compatible = adev->data.of_compatible; | |
821 | if (!of_compatible) | |
822 | return false; | |
823 | ||
824 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
825 | obj = of_compatible->package.elements; | |
826 | else /* Must be ACPI_TYPE_STRING. */ | |
827 | obj = of_compatible; | |
828 | ||
829 | str = obj->string.pointer; | |
830 | chr = strchr(str, ','); | |
b75d2cd0 | 831 | strscpy(modalias, chr ? chr + 1 : str, len); |
51ede5d9 DD |
832 | |
833 | return true; | |
834 | } | |
835 | ||
836 | /** | |
837 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
838 | * @adev: ACPI device object to match | |
839 | * @default_id: ID string to use as default if no compatible string found | |
840 | * @modalias: Pointer to buffer that modalias value will be copied into | |
841 | * @len: Length of modalias buffer | |
842 | * | |
673aa1ed MR |
843 | * This is a counterpart of of_alias_from_compatible() for struct acpi_device |
844 | * objects. If there is a compatible string for @adev, it will be copied to | |
845 | * @modalias with the vendor prefix stripped; otherwise, @default_id will be | |
846 | * used. | |
51ede5d9 DD |
847 | */ |
848 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
849 | char *modalias, size_t len) | |
850 | { | |
851 | if (!acpi_of_modalias(adev, modalias, len)) | |
b75d2cd0 | 852 | strscpy(modalias, default_id, len); |
51ede5d9 DD |
853 | } |
854 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
855 | ||
68c6b148 RW |
856 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
857 | struct acpi_hardware_id *hwid) | |
858 | { | |
859 | int i, msk, byte_shift; | |
860 | char buf[3]; | |
861 | ||
862 | if (!id->cls) | |
863 | return false; | |
864 | ||
865 | /* Apply class-code bitmask, before checking each class-code byte */ | |
866 | for (i = 1; i <= 3; i++) { | |
867 | byte_shift = 8 * (3 - i); | |
868 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
869 | if (!msk) | |
870 | continue; | |
871 | ||
872 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
873 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
874 | return false; | |
875 | } | |
876 | return true; | |
877 | } | |
878 | ||
86fca926 | 879 | static bool __acpi_match_device(const struct acpi_device *device, |
4222f38c AS |
880 | const struct acpi_device_id *acpi_ids, |
881 | const struct of_device_id *of_ids, | |
882 | const struct acpi_device_id **acpi_id, | |
883 | const struct of_device_id **of_id) | |
68c6b148 RW |
884 | { |
885 | const struct acpi_device_id *id; | |
886 | struct acpi_hardware_id *hwid; | |
887 | ||
888 | /* | |
889 | * If the device is not present, it is unnecessary to load device | |
890 | * driver for it. | |
891 | */ | |
892 | if (!device || !device->status.present) | |
4222f38c | 893 | return false; |
68c6b148 RW |
894 | |
895 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
896 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
4222f38c AS |
897 | if (acpi_ids) { |
898 | for (id = acpi_ids; id->id[0] || id->cls; id++) { | |
899 | if (id->id[0] && !strcmp((char *)id->id, hwid->id)) | |
900 | goto out_acpi_match; | |
901 | if (id->cls && __acpi_match_device_cls(id, hwid)) | |
902 | goto out_acpi_match; | |
903 | } | |
68c6b148 RW |
904 | } |
905 | ||
906 | /* | |
907 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
908 | * "compatible" property if found. | |
68c6b148 | 909 | */ |
4222f38c AS |
910 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) |
911 | return acpi_of_match_device(device, of_ids, of_id); | |
68c6b148 | 912 | } |
4222f38c AS |
913 | return false; |
914 | ||
915 | out_acpi_match: | |
916 | if (acpi_id) | |
917 | *acpi_id = id; | |
918 | return true; | |
68c6b148 RW |
919 | } |
920 | ||
2b5ae960 AS |
921 | /** |
922 | * acpi_match_acpi_device - Match an ACPI device against a given list of ACPI IDs | |
923 | * @ids: Array of struct acpi_device_id objects to match against. | |
924 | * @adev: The ACPI device pointer to match. | |
925 | * | |
926 | * Match the ACPI device @adev against a given list of ACPI IDs @ids. | |
927 | * | |
928 | * Return: | |
929 | * a pointer to the first matching ACPI ID on success or %NULL on failure. | |
930 | */ | |
931 | const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids, | |
932 | const struct acpi_device *adev) | |
933 | { | |
934 | const struct acpi_device_id *id = NULL; | |
935 | ||
936 | __acpi_match_device(adev, ids, NULL, &id, NULL); | |
937 | return id; | |
938 | } | |
939 | EXPORT_SYMBOL_GPL(acpi_match_acpi_device); | |
940 | ||
68c6b148 RW |
941 | /** |
942 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
943 | * @ids: Array of struct acpi_device_id object to match against. | |
944 | * @dev: The device structure to match. | |
945 | * | |
946 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
947 | * object for that handle and use that object to match against a given list of | |
948 | * device IDs. | |
949 | * | |
950 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
951 | */ | |
952 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
953 | const struct device *dev) | |
954 | { | |
2b5ae960 | 955 | return acpi_match_acpi_device(ids, acpi_companion_match(dev)); |
68c6b148 RW |
956 | } |
957 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
958 | ||
886ca88b AS |
959 | static const void *acpi_of_device_get_match_data(const struct device *dev) |
960 | { | |
961 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
962 | const struct of_device_id *match = NULL; | |
963 | ||
964 | if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match)) | |
965 | return NULL; | |
966 | ||
967 | return match->data; | |
968 | } | |
969 | ||
67dcc26d | 970 | const void *acpi_device_get_match_data(const struct device *dev) |
80212a16 | 971 | { |
fe79e392 | 972 | const struct acpi_device_id *acpi_ids = dev->driver->acpi_match_table; |
80212a16 SK |
973 | const struct acpi_device_id *match; |
974 | ||
fe79e392 | 975 | if (!acpi_ids) |
886ca88b AS |
976 | return acpi_of_device_get_match_data(dev); |
977 | ||
fe79e392 | 978 | match = acpi_match_device(acpi_ids, dev); |
80212a16 SK |
979 | if (!match) |
980 | return NULL; | |
981 | ||
67dcc26d | 982 | return (const void *)match->driver_data; |
80212a16 | 983 | } |
29d5325a | 984 | EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a16 | 985 | |
68c6b148 RW |
986 | int acpi_match_device_ids(struct acpi_device *device, |
987 | const struct acpi_device_id *ids) | |
988 | { | |
4222f38c | 989 | return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148 RW |
990 | } |
991 | EXPORT_SYMBOL(acpi_match_device_ids); | |
992 | ||
993 | bool acpi_driver_match_device(struct device *dev, | |
994 | const struct device_driver *drv) | |
995 | { | |
fe79e392 AS |
996 | const struct acpi_device_id *acpi_ids = drv->acpi_match_table; |
997 | const struct of_device_id *of_ids = drv->of_match_table; | |
68c6b148 | 998 | |
fe79e392 AS |
999 | if (!acpi_ids) |
1000 | return acpi_of_match_device(ACPI_COMPANION(dev), of_ids, NULL); | |
1001 | ||
1002 | return __acpi_match_device(acpi_companion_match(dev), acpi_ids, of_ids, NULL, NULL); | |
68c6b148 RW |
1003 | } |
1004 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
1005 | ||
5894b0c4 RW |
1006 | /* -------------------------------------------------------------------------- |
1007 | ACPI Driver Management | |
1008 | -------------------------------------------------------------------------- */ | |
1009 | ||
1010 | /** | |
48b9c486 | 1011 | * __acpi_bus_register_driver - register a driver with the ACPI bus |
5894b0c4 | 1012 | * @driver: driver being registered |
48b9c486 | 1013 | * @owner: owning module/driver |
5894b0c4 RW |
1014 | * |
1015 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
1016 | * devices that match the driver's criteria and binds. Returns zero for | |
1017 | * success or a negative error status for failure. | |
1018 | */ | |
48b9c486 | 1019 | int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner) |
5894b0c4 | 1020 | { |
5894b0c4 RW |
1021 | if (acpi_disabled) |
1022 | return -ENODEV; | |
1023 | driver->drv.name = driver->name; | |
1024 | driver->drv.bus = &acpi_bus_type; | |
48b9c486 | 1025 | driver->drv.owner = owner; |
5894b0c4 | 1026 | |
4b76dfbc | 1027 | return driver_register(&driver->drv); |
5894b0c4 RW |
1028 | } |
1029 | ||
48b9c486 | 1030 | EXPORT_SYMBOL(__acpi_bus_register_driver); |
5894b0c4 RW |
1031 | |
1032 | /** | |
1033 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
1034 | * @driver: driver to unregister | |
1035 | * | |
1036 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
1037 | * devices that match the driver's criteria and unbinds. | |
1038 | */ | |
1039 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
1040 | { | |
1041 | driver_unregister(&driver->drv); | |
1042 | } | |
1043 | ||
1044 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
1045 | ||
1046 | /* -------------------------------------------------------------------------- | |
1047 | ACPI Bus operations | |
1048 | -------------------------------------------------------------------------- */ | |
1049 | ||
d69d8048 | 1050 | static int acpi_bus_match(struct device *dev, const struct device_driver *drv) |
5894b0c4 RW |
1051 | { |
1052 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
d69d8048 | 1053 | const struct acpi_driver *acpi_drv = to_acpi_driver(drv); |
5894b0c4 RW |
1054 | |
1055 | return acpi_dev->flags.match_driver | |
1056 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
1057 | } | |
1058 | ||
2a81ada3 | 1059 | static int acpi_device_uevent(const struct device *dev, struct kobj_uevent_env *env) |
5894b0c4 RW |
1060 | { |
1061 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
1062 | } | |
1063 | ||
1064 | static int acpi_device_probe(struct device *dev) | |
1065 | { | |
1066 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1067 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
1068 | int ret; | |
1069 | ||
1070 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | if (!acpi_drv->ops.add) | |
1074 | return -ENOSYS; | |
1075 | ||
1076 | ret = acpi_drv->ops.add(acpi_dev); | |
0d167101 MW |
1077 | if (ret) { |
1078 | acpi_dev->driver_data = NULL; | |
5894b0c4 | 1079 | return ret; |
0d167101 | 1080 | } |
5894b0c4 | 1081 | |
ee98460b RW |
1082 | pr_debug("Driver [%s] successfully bound to device [%s]\n", |
1083 | acpi_drv->name, acpi_dev->pnp.bus_id); | |
5894b0c4 RW |
1084 | |
1085 | if (acpi_drv->ops.notify) { | |
c56610a8 | 1086 | ret = acpi_device_install_notify_handler(acpi_dev, acpi_drv); |
5894b0c4 RW |
1087 | if (ret) { |
1088 | if (acpi_drv->ops.remove) | |
1089 | acpi_drv->ops.remove(acpi_dev); | |
1090 | ||
5894b0c4 RW |
1091 | acpi_dev->driver_data = NULL; |
1092 | return ret; | |
1093 | } | |
1094 | } | |
1095 | ||
ee98460b RW |
1096 | pr_debug("Found driver [%s] for device [%s]\n", acpi_drv->name, |
1097 | acpi_dev->pnp.bus_id); | |
1098 | ||
5894b0c4 RW |
1099 | get_device(dev); |
1100 | return 0; | |
1101 | } | |
1102 | ||
fc7a6209 | 1103 | static void acpi_device_remove(struct device *dev) |
5894b0c4 RW |
1104 | { |
1105 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
d6fb6ee1 | 1106 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
5894b0c4 | 1107 | |
e5ed878d | 1108 | if (acpi_drv->ops.notify) |
c56610a8 | 1109 | acpi_device_remove_notify_handler(acpi_dev, acpi_drv); |
e5ed878d UKK |
1110 | |
1111 | if (acpi_drv->ops.remove) | |
1112 | acpi_drv->ops.remove(acpi_dev); | |
5894b0c4 | 1113 | |
5894b0c4 RW |
1114 | acpi_dev->driver_data = NULL; |
1115 | ||
1116 | put_device(dev); | |
5894b0c4 RW |
1117 | } |
1118 | ||
592190b5 | 1119 | const struct bus_type acpi_bus_type = { |
5894b0c4 RW |
1120 | .name = "acpi", |
1121 | .match = acpi_bus_match, | |
1122 | .probe = acpi_device_probe, | |
1123 | .remove = acpi_device_remove, | |
1124 | .uevent = acpi_device_uevent, | |
1125 | }; | |
3c36fe93 RW |
1126 | |
1127 | int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data) | |
1128 | { | |
1129 | return bus_for_each_dev(&acpi_bus_type, NULL, data, fn); | |
1130 | } | |
1131 | EXPORT_SYMBOL_GPL(acpi_bus_for_each_dev); | |
5894b0c4 | 1132 | |
10fa1b2c RW |
1133 | struct acpi_dev_walk_context { |
1134 | int (*fn)(struct acpi_device *, void *); | |
1135 | void *data; | |
1136 | }; | |
1137 | ||
1138 | static int acpi_dev_for_one_check(struct device *dev, void *context) | |
1139 | { | |
1140 | struct acpi_dev_walk_context *adwc = context; | |
1141 | ||
1142 | if (dev->bus != &acpi_bus_type) | |
1143 | return 0; | |
1144 | ||
1145 | return adwc->fn(to_acpi_device(dev), adwc->data); | |
1146 | } | |
f8128c39 | 1147 | EXPORT_SYMBOL_GPL(acpi_dev_for_each_child); |
10fa1b2c | 1148 | |
cf6ba075 | 1149 | int acpi_dev_for_each_child(struct acpi_device *adev, |
10fa1b2c | 1150 | int (*fn)(struct acpi_device *, void *), void *data) |
cf6ba075 | 1151 | { |
10fa1b2c RW |
1152 | struct acpi_dev_walk_context adwc = { |
1153 | .fn = fn, | |
1154 | .data = data, | |
1155 | }; | |
1156 | ||
1157 | return device_for_each_child(&adev->dev, &adwc, acpi_dev_for_one_check); | |
cf6ba075 RW |
1158 | } |
1159 | ||
ff32e599 RW |
1160 | int acpi_dev_for_each_child_reverse(struct acpi_device *adev, |
1161 | int (*fn)(struct acpi_device *, void *), | |
1162 | void *data) | |
1163 | { | |
1164 | struct acpi_dev_walk_context adwc = { | |
1165 | .fn = fn, | |
1166 | .data = data, | |
1167 | }; | |
1168 | ||
1169 | return device_for_each_child_reverse(&adev->dev, &adwc, acpi_dev_for_one_check); | |
1170 | } | |
1171 | ||
1da177e4 LT |
1172 | /* -------------------------------------------------------------------------- |
1173 | Initialization/Cleanup | |
1174 | -------------------------------------------------------------------------- */ | |
1175 | ||
4be44fcd | 1176 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 1177 | { |
6a8c0af6 | 1178 | acpi_status status; |
4be44fcd | 1179 | char *message = NULL; |
1da177e4 | 1180 | |
1da177e4 | 1181 | |
aafbcd16 | 1182 | /* |
1da177e4 LT |
1183 | * Let the system know what interrupt model we are using by |
1184 | * evaluating the \_PIC object, if exists. | |
1185 | */ | |
1186 | ||
1187 | switch (acpi_irq_model) { | |
1188 | case ACPI_IRQ_MODEL_PIC: | |
1189 | message = "PIC"; | |
1190 | break; | |
1191 | case ACPI_IRQ_MODEL_IOAPIC: | |
1192 | message = "IOAPIC"; | |
1193 | break; | |
1194 | case ACPI_IRQ_MODEL_IOSAPIC: | |
1195 | message = "IOSAPIC"; | |
1196 | break; | |
fbe61ec7 HG |
1197 | case ACPI_IRQ_MODEL_GIC: |
1198 | message = "GIC"; | |
1199 | break; | |
3948ec94 JK |
1200 | case ACPI_IRQ_MODEL_PLATFORM: |
1201 | message = "platform specific model"; | |
1202 | break; | |
e8bba72b JL |
1203 | case ACPI_IRQ_MODEL_LPIC: |
1204 | message = "LPIC"; | |
1205 | break; | |
1da177e4 | 1206 | default: |
ee98460b | 1207 | pr_info("Unknown interrupt routing model\n"); |
d550d98d | 1208 | return -ENODEV; |
1da177e4 LT |
1209 | } |
1210 | ||
ee98460b | 1211 | pr_info("Using %s for interrupt routing\n", message); |
1da177e4 | 1212 | |
0db98202 | 1213 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 1214 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
ee98460b | 1215 | pr_info("_PIC evaluation failed: %s\n", acpi_format_exception(status)); |
d550d98d | 1216 | return -ENODEV; |
1da177e4 LT |
1217 | } |
1218 | ||
d550d98d | 1219 | return 0; |
1da177e4 LT |
1220 | } |
1221 | ||
b064a8fa RW |
1222 | /** |
1223 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1224 | * | |
1225 | * The ACPI tables are accessible after this, but the handling of events has not | |
1226 | * been initialized and the global lock is not available yet, so AML should not | |
1227 | * be executed at this point. | |
1228 | * | |
1229 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1230 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1231 | */ | |
4be44fcd | 1232 | void __init acpi_early_init(void) |
1da177e4 | 1233 | { |
6a8c0af6 | 1234 | acpi_status status; |
1da177e4 LT |
1235 | |
1236 | if (acpi_disabled) | |
d550d98d | 1237 | return; |
1da177e4 | 1238 | |
ee98460b | 1239 | pr_info("Core revision %08x\n", ACPI_CA_VERSION); |
61686124 | 1240 | |
1da177e4 LT |
1241 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1242 | if (!acpi_strict) | |
1243 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1244 | ||
8d3523fb | 1245 | acpi_permanent_mmap = true; |
ad71860a | 1246 | |
5d128fbd | 1247 | #ifdef CONFIG_X86 |
ae976358 KHF |
1248 | /* |
1249 | * If the machine falls into the DMI check table, | |
5d128fbd JD |
1250 | * DSDT will be copied to memory. |
1251 | * Note that calling dmi_check_system() here on other architectures | |
1252 | * would not be OK because only x86 initializes dmi early enough. | |
1253 | * Thankfully only x86 systems need such quirks for now. | |
ae976358 KHF |
1254 | */ |
1255 | dmi_check_system(dsdt_dmi_table); | |
5d128fbd | 1256 | #endif |
aa2110cb | 1257 | |
ad71860a AS |
1258 | status = acpi_reallocate_root_table(); |
1259 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1260 | pr_err("Unable to reallocate ACPI tables\n"); |
ad71860a AS |
1261 | goto error0; |
1262 | } | |
1263 | ||
1da177e4 LT |
1264 | status = acpi_initialize_subsystem(); |
1265 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1266 | pr_err("Unable to initialize the ACPI Interpreter\n"); |
1da177e4 LT |
1267 | goto error0; |
1268 | } | |
1269 | ||
1da177e4 LT |
1270 | #ifdef CONFIG_X86 |
1271 | if (!acpi_ioapic) { | |
1da177e4 | 1272 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1273 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1274 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1275 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1276 | } | |
1da177e4 | 1277 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1278 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1279 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1280 | } else { |
1da177e4 | 1281 | /* |
cee324b1 | 1282 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1283 | * update it with result from INT_SRC_OVR parsing |
1284 | */ | |
cee324b1 | 1285 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1286 | } |
1287 | #endif | |
b064a8fa RW |
1288 | return; |
1289 | ||
1290 | error0: | |
1291 | disable_acpi(); | |
1292 | } | |
1293 | ||
1294 | /** | |
1295 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1296 | * | |
3af03f77 | 1297 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1298 | * |
1299 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1300 | * done before all things that really depend on ACPI. The right spot appears to | |
1301 | * be before finalizing the EFI initialization. | |
1302 | */ | |
1303 | void __init acpi_subsystem_init(void) | |
1304 | { | |
1305 | acpi_status status; | |
1306 | ||
1307 | if (acpi_disabled) | |
1308 | return; | |
1da177e4 | 1309 | |
4505a201 | 1310 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 | 1311 | if (ACPI_FAILURE(status)) { |
ee98460b | 1312 | pr_err("Unable to enable ACPI\n"); |
b064a8fa RW |
1313 | disable_acpi(); |
1314 | } else { | |
1315 | /* | |
1316 | * If the system is using ACPI then we can be reasonably | |
1317 | * confident that any regulators are managed by the firmware | |
1318 | * so tell the regulator core it has everything it needs to | |
1319 | * know. | |
1320 | */ | |
1321 | regulator_has_full_constraints(); | |
1da177e4 | 1322 | } |
1da177e4 LT |
1323 | } |
1324 | ||
68bdb677 OP |
1325 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1326 | { | |
8d287e82 RW |
1327 | if (event == ACPI_TABLE_EVENT_LOAD) |
1328 | acpi_scan_table_notify(); | |
68bdb677 OP |
1329 | |
1330 | return acpi_sysfs_table_handler(event, table, context); | |
1331 | } | |
1332 | ||
4be44fcd | 1333 | static int __init acpi_bus_init(void) |
1da177e4 | 1334 | { |
6a8c0af6 BH |
1335 | int result; |
1336 | acpi_status status; | |
1da177e4 | 1337 | |
176f9c18 | 1338 | acpi_os_initialize1(); |
1da177e4 | 1339 | |
d737f333 ES |
1340 | status = acpi_load_tables(); |
1341 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1342 | pr_err("Unable to load the System Description Tables\n"); |
d737f333 | 1343 | goto error1; |
fe6cbea0 LZ |
1344 | } |
1345 | ||
b1c03308 RW |
1346 | /* |
1347 | * ACPI 2.0 requires the EC driver to be loaded and work before the EC | |
1348 | * device is found in the namespace. | |
1349 | * | |
1350 | * This is accomplished by looking for the ECDT table and getting the EC | |
1351 | * parameters out of that. | |
1352 | * | |
1353 | * Do that before calling acpi_initialize_objects() which may trigger EC | |
1354 | * address space accesses. | |
1355 | */ | |
1356 | acpi_ec_ecdt_probe(); | |
1357 | ||
fe6cbea0 LZ |
1358 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1359 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1360 | pr_err("Unable to start the ACPI Interpreter\n"); |
fe6cbea0 LZ |
1361 | goto error1; |
1362 | } | |
1363 | ||
1da177e4 LT |
1364 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1365 | if (ACPI_FAILURE(status)) { | |
ee98460b | 1366 | pr_err("Unable to initialize ACPI objects\n"); |
1da177e4 LT |
1367 | goto error1; |
1368 | } | |
1369 | ||
fc54ab72 LM |
1370 | /* |
1371 | * _OSC method may exist in module level code, | |
1372 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1373 | */ | |
719e1f56 | 1374 | acpi_bus_osc_negotiate_platform_control(); |
5a6a2c0f | 1375 | acpi_bus_osc_negotiate_usb_control(); |
fc54ab72 | 1376 | |
b1d248d9 ZR |
1377 | /* |
1378 | * _PDC control method may load dynamic SSDT tables, | |
1379 | * and we need to install the table handler before that. | |
1380 | */ | |
68bdb677 OP |
1381 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1382 | ||
b1d248d9 ZR |
1383 | acpi_sysfs_init(); |
1384 | ||
95272641 | 1385 | acpi_early_processor_control_setup(); |
78f16996 | 1386 | |
455c8793 ZY |
1387 | /* |
1388 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1389 | * is necessary to enable it as early as possible. | |
1390 | */ | |
dcf15cbd | 1391 | acpi_ec_dsdt_probe(); |
455c8793 | 1392 | |
ee98460b | 1393 | pr_info("Interpreter enabled\n"); |
1da177e4 | 1394 | |
aafbcd16 AS |
1395 | /* Initialize sleep structures */ |
1396 | acpi_sleep_init(); | |
1397 | ||
1da177e4 LT |
1398 | /* |
1399 | * Get the system interrupt model and evaluate \_PIC. | |
1400 | */ | |
1401 | result = acpi_bus_init_irq(); | |
1402 | if (result) | |
1403 | goto error1; | |
1404 | ||
1405 | /* | |
1406 | * Register the for all standard device notifications. | |
1407 | */ | |
4be44fcd LB |
1408 | status = |
1409 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1410 | &acpi_bus_notify, NULL); | |
1da177e4 | 1411 | if (ACPI_FAILURE(status)) { |
ee98460b | 1412 | pr_err("Unable to register for system notifications\n"); |
1da177e4 LT |
1413 | goto error1; |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Create the top ACPI proc directory | |
1418 | */ | |
1419 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1420 | ||
1dcc3d33 RW |
1421 | result = bus_register(&acpi_bus_type); |
1422 | if (!result) | |
1423 | return 0; | |
1da177e4 LT |
1424 | |
1425 | /* Mimic structured exception handling */ | |
4be44fcd | 1426 | error1: |
1da177e4 | 1427 | acpi_terminate(); |
d550d98d | 1428 | return -ENODEV; |
1da177e4 LT |
1429 | } |
1430 | ||
99e0d2fc | 1431 | struct kobject *acpi_kobj; |
f2d4753f | 1432 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1433 | |
4be44fcd | 1434 | static int __init acpi_init(void) |
1da177e4 | 1435 | { |
6831c6ed | 1436 | int result; |
1da177e4 | 1437 | |
1da177e4 | 1438 | if (acpi_disabled) { |
ee98460b | 1439 | pr_info("Interpreter disabled.\n"); |
d550d98d | 1440 | return -ENODEV; |
1da177e4 LT |
1441 | } |
1442 | ||
f62ed9e3 | 1443 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
9b645601 | 1444 | if (!acpi_kobj) |
ee98460b | 1445 | pr_debug("%s: kset create error\n", __func__); |
1da177e4 | 1446 | |
cefc7ca4 | 1447 | init_prmt(); |
77e2a047 | 1448 | acpi_init_pcc(); |
1da177e4 | 1449 | result = acpi_bus_init(); |
6831c6ed | 1450 | if (result) { |
4ac7a817 | 1451 | kobject_put(acpi_kobj); |
1da177e4 | 1452 | disable_acpi(); |
81d0273d | 1453 | return result; |
6831c6ed | 1454 | } |
d7d43321 | 1455 | acpi_init_ffh(); |
81d0273d | 1456 | |
6831c6ed | 1457 | pci_mmcfg_late_init(); |
3dcb861d | 1458 | acpi_viot_early_init(); |
dc4e8c07 | 1459 | acpi_hest_init(); |
27e932a3 | 1460 | acpi_ghes_init(); |
d5921c46 | 1461 | acpi_arm_init(); |
e747f274 | 1462 | acpi_scan_init(); |
a5f820fe | 1463 | acpi_ec_init(); |
a25ee920 | 1464 | acpi_debugfs_init(); |
9cee43e0 | 1465 | acpi_sleep_proc_init(); |
201b8c65 | 1466 | acpi_wakeup_device_init(); |
836d0830 | 1467 | acpi_debugger_init(); |
baa0c019 | 1468 | acpi_setup_sb_notify_handler(); |
3cf48554 | 1469 | acpi_viot_init(); |
6831c6ed | 1470 | return 0; |
1da177e4 LT |
1471 | } |
1472 | ||
1473 | subsys_initcall(acpi_init); |