Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * pnpacpi -- PnP ACPI driver | |
3 | * | |
4 | * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr> | |
5 | * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com> | |
55955aad | 6 | * |
1da177e4 LT |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
55955aad | 21 | |
26e6e9e5 | 22 | #include <linux/export.h> |
1da177e4 LT |
23 | #include <linux/acpi.h> |
24 | #include <linux/pnp.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
29b71a1c | 26 | #include <linux/mod_devicetable.h> |
1da177e4 | 27 | #include <acpi/acpi_bus.h> |
29b71a1c | 28 | |
1692b27b | 29 | #include "../base.h" |
1da177e4 LT |
30 | #include "pnpacpi.h" |
31 | ||
420a0f66 | 32 | static int num; |
1da177e4 | 33 | |
c4bb6f5a MC |
34 | /* We need only to blacklist devices that have already an acpi driver that |
35 | * can't use pnp layer. We don't need to blacklist device that are directly | |
36 | * used by the kernel (PCI root, ...), as it is harmless and there were | |
37 | * already present in pnpbios. But there is an exception for devices that | |
38 | * have irqs (PIC, Timer) because we call acpi_register_gsi. | |
07d4e9af | 39 | * Finally, only devices that have a CRS method need to be in this list. |
c4bb6f5a | 40 | */ |
6bf69b5e | 41 | static struct acpi_device_id excluded_id_list[] __initdata = { |
9dd78466 BH |
42 | {"PNP0C09", 0}, /* EC */ |
43 | {"PNP0C0F", 0}, /* Link device */ | |
44 | {"PNP0000", 0}, /* PIC */ | |
45 | {"PNP0100", 0}, /* Timer */ | |
29b71a1c TR |
46 | {"", 0}, |
47 | }; | |
48 | ||
9448b0d4 | 49 | static inline int __init is_exclusive_device(struct acpi_device *dev) |
1da177e4 | 50 | { |
29b71a1c | 51 | return (!acpi_match_device_ids(dev, excluded_id_list)); |
1da177e4 LT |
52 | } |
53 | ||
1da177e4 LT |
54 | /* |
55 | * Compatible Device IDs | |
56 | */ | |
57 | #define TEST_HEX(c) \ | |
58 | if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ | |
59 | return 0 | |
60 | #define TEST_ALPHA(c) \ | |
cdc87c5a | 61 | if (!('A' <= (c) && (c) <= 'Z')) \ |
1da177e4 | 62 | return 0 |
620e112c | 63 | static int __init ispnpidacpi(const char *id) |
1da177e4 LT |
64 | { |
65 | TEST_ALPHA(id[0]); | |
66 | TEST_ALPHA(id[1]); | |
67 | TEST_ALPHA(id[2]); | |
68 | TEST_HEX(id[3]); | |
69 | TEST_HEX(id[4]); | |
70 | TEST_HEX(id[5]); | |
71 | TEST_HEX(id[6]); | |
72 | if (id[7] != '\0') | |
73 | return 0; | |
74 | return 1; | |
75 | } | |
76 | ||
59284cb4 | 77 | static int pnpacpi_get_resources(struct pnp_dev *dev) |
1da177e4 | 78 | { |
2f53432c | 79 | pnp_dbg(&dev->dev, "get resources\n"); |
d152cf5d | 80 | return pnpacpi_parse_allocated_resource(dev); |
1da177e4 LT |
81 | } |
82 | ||
59284cb4 | 83 | static int pnpacpi_set_resources(struct pnp_dev *dev) |
1da177e4 | 84 | { |
cc8e7a35 RW |
85 | struct acpi_device *acpi_dev; |
86 | acpi_handle handle; | |
1da177e4 | 87 | struct acpi_buffer buffer; |
cdef6254 | 88 | int ret; |
1da177e4 | 89 | |
2f53432c | 90 | pnp_dbg(&dev->dev, "set resources\n"); |
cc8e7a35 RW |
91 | |
92 | handle = DEVICE_ACPI_HANDLE(&dev->dev); | |
cfc57557 | 93 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
94 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
95 | return -ENODEV; | |
96 | } | |
97 | ||
a6b5e88c RW |
98 | if (WARN_ON_ONCE(acpi_dev != dev->data)) |
99 | dev->data = acpi_dev; | |
100 | ||
cdef6254 | 101 | ret = pnpacpi_build_resource_template(dev, &buffer); |
1da177e4 LT |
102 | if (ret) |
103 | return ret; | |
4ab55d8d | 104 | ret = pnpacpi_encode_resources(dev, &buffer); |
1da177e4 LT |
105 | if (ret) { |
106 | kfree(buffer.pointer); | |
107 | return ret; | |
108 | } | |
6328a574 | 109 | if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer))) |
1da177e4 | 110 | ret = -EINVAL; |
6328a574 WS |
111 | else if (acpi_bus_power_manageable(handle)) |
112 | ret = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
1da177e4 LT |
113 | kfree(buffer.pointer); |
114 | return ret; | |
115 | } | |
116 | ||
117 | static int pnpacpi_disable_resources(struct pnp_dev *dev) | |
118 | { | |
cc8e7a35 RW |
119 | struct acpi_device *acpi_dev; |
120 | acpi_handle handle; | |
6328a574 WS |
121 | int ret; |
122 | ||
123 | dev_dbg(&dev->dev, "disable resources\n"); | |
55955aad | 124 | |
cc8e7a35 | 125 | handle = DEVICE_ACPI_HANDLE(&dev->dev); |
cfc57557 | 126 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
127 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
128 | return 0; | |
129 | } | |
130 | ||
1da177e4 | 131 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
6328a574 | 132 | ret = 0; |
19bde778 LB |
133 | if (acpi_bus_power_manageable(handle)) |
134 | acpi_bus_set_power(handle, ACPI_STATE_D3); | |
135 | /* continue even if acpi_bus_set_power() fails */ | |
6328a574 WS |
136 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL))) |
137 | ret = -ENODEV; | |
138 | return ret; | |
1da177e4 LT |
139 | } |
140 | ||
673d5b43 | 141 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e AS |
142 | static bool pnpacpi_can_wakeup(struct pnp_dev *dev) |
143 | { | |
cc8e7a35 RW |
144 | struct acpi_device *acpi_dev; |
145 | acpi_handle handle; | |
146 | ||
147 | handle = DEVICE_ACPI_HANDLE(&dev->dev); | |
cfc57557 | 148 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
149 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
150 | return false; | |
151 | } | |
b14e033e AS |
152 | |
153 | return acpi_bus_can_wakeup(handle); | |
154 | } | |
155 | ||
fc30e68e SL |
156 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
157 | { | |
cc8e7a35 RW |
158 | struct acpi_device *acpi_dev; |
159 | acpi_handle handle; | |
160 | int error = 0; | |
161 | ||
162 | handle = DEVICE_ACPI_HANDLE(&dev->dev); | |
cfc57557 | 163 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
164 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
165 | return 0; | |
166 | } | |
36e02b62 | 167 | |
b14e033e | 168 | if (device_can_wakeup(&dev->dev)) { |
cc8e7a35 | 169 | error = acpi_pm_device_sleep_wake(&dev->dev, |
b14e033e | 170 | device_may_wakeup(&dev->dev)); |
cc8e7a35 RW |
171 | if (error) |
172 | return error; | |
173 | } | |
174 | ||
175 | if (acpi_bus_power_manageable(handle)) { | |
ee85f543 HY |
176 | int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL, |
177 | ACPI_STATE_D3); | |
cc8e7a35 RW |
178 | if (power_state < 0) |
179 | power_state = (state.event == PM_EVENT_ON) ? | |
180 | ACPI_STATE_D0 : ACPI_STATE_D3; | |
181 | ||
182 | /* | |
183 | * acpi_bus_set_power() often fails (keyboard port can't be | |
184 | * powered-down?), and in any case, our return value is ignored | |
185 | * by pnp_bus_suspend(). Hence we don't revert the wakeup | |
186 | * setting if the set_power fails. | |
187 | */ | |
188 | error = acpi_bus_set_power(handle, power_state); | |
b14e033e | 189 | } |
cc8e7a35 RW |
190 | |
191 | return error; | |
fc30e68e SL |
192 | } |
193 | ||
194 | static int pnpacpi_resume(struct pnp_dev *dev) | |
195 | { | |
cc8e7a35 RW |
196 | struct acpi_device *acpi_dev; |
197 | acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); | |
198 | int error = 0; | |
199 | ||
cfc57557 | 200 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
201 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
202 | return -ENODEV; | |
203 | } | |
c4da6940 | 204 | |
b14e033e AS |
205 | if (device_may_wakeup(&dev->dev)) |
206 | acpi_pm_device_sleep_wake(&dev->dev, false); | |
cc8e7a35 RW |
207 | |
208 | if (acpi_bus_power_manageable(handle)) | |
209 | error = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
210 | ||
211 | return error; | |
fc30e68e | 212 | } |
673d5b43 | 213 | #endif |
fc30e68e | 214 | |
9065ce45 | 215 | struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
216 | .name = "Plug and Play ACPI", |
217 | .get = pnpacpi_get_resources, | |
218 | .set = pnpacpi_set_resources, | |
1da177e4 | 219 | .disable = pnpacpi_disable_resources, |
673d5b43 | 220 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e | 221 | .can_wakeup = pnpacpi_can_wakeup, |
fc30e68e SL |
222 | .suspend = pnpacpi_suspend, |
223 | .resume = pnpacpi_resume, | |
673d5b43 | 224 | #endif |
1da177e4 | 225 | }; |
9065ce45 | 226 | EXPORT_SYMBOL(pnpacpi_protocol); |
1da177e4 | 227 | |
66c3ec4f | 228 | static char *__init pnpacpi_get_id(struct acpi_device *device) |
420a0f66 DT |
229 | { |
230 | struct acpi_hardware_id *id; | |
231 | ||
232 | list_for_each_entry(id, &device->pnp.ids, list) { | |
233 | if (ispnpidacpi(id->id)) | |
234 | return id->id; | |
235 | } | |
236 | ||
237 | return NULL; | |
238 | } | |
239 | ||
1da177e4 LT |
240 | static int __init pnpacpi_add_device(struct acpi_device *device) |
241 | { | |
242 | acpi_handle temp = NULL; | |
243 | acpi_status status; | |
1da177e4 | 244 | struct pnp_dev *dev; |
420a0f66 | 245 | char *pnpid; |
7f47fa6c | 246 | struct acpi_hardware_id *id; |
1da177e4 | 247 | |
29058753 AH |
248 | /* Skip devices that are already bound */ |
249 | if (device->physical_node_count) | |
250 | return 0; | |
251 | ||
39a0ad87 ZY |
252 | /* |
253 | * If a PnPacpi device is not present , the device | |
254 | * driver should not be loaded. | |
255 | */ | |
07b0120d | 256 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
420a0f66 DT |
257 | if (ACPI_FAILURE(status)) |
258 | return 0; | |
259 | ||
260 | pnpid = pnpacpi_get_id(device); | |
261 | if (!pnpid) | |
262 | return 0; | |
263 | ||
264 | if (is_exclusive_device(device) || !device->status.present) | |
1da177e4 LT |
265 | return 0; |
266 | ||
420a0f66 | 267 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid); |
bda1e4e5 | 268 | if (!dev) |
1da177e4 | 269 | return -ENOMEM; |
bda1e4e5 | 270 | |
c4da6940 | 271 | dev->data = device; |
07d4e9af | 272 | /* .enabled means the device can decode the resources */ |
1da177e4 LT |
273 | dev->active = device->status.enabled; |
274 | status = acpi_get_handle(device->handle, "_SRS", &temp); | |
275 | if (ACPI_SUCCESS(status)) | |
276 | dev->capabilities |= PNP_CONFIGURABLE; | |
277 | dev->capabilities |= PNP_READ; | |
856608ee | 278 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
279 | dev->capabilities |= PNP_WRITE; |
280 | if (device->flags.removable) | |
281 | dev->capabilities |= PNP_REMOVABLE; | |
282 | status = acpi_get_handle(device->handle, "_DIS", &temp); | |
283 | if (ACPI_SUCCESS(status)) | |
284 | dev->capabilities |= PNP_DISABLE; | |
285 | ||
1da177e4 LT |
286 | if (strlen(acpi_device_name(device))) |
287 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
288 | else | |
289 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
290 | ||
d152cf5d BH |
291 | if (dev->active) |
292 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 293 | |
d152cf5d BH |
294 | if (dev->capabilities & PNP_CONFIGURABLE) |
295 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 296 | |
7f47fa6c | 297 | list_for_each_entry(id, &device->pnp.ids, list) { |
420a0f66 | 298 | if (!strcmp(id->id, pnpid)) |
7f47fa6c BH |
299 | continue; |
300 | if (!ispnpidacpi(id->id)) | |
301 | continue; | |
302 | pnp_add_id(dev, id->id); | |
1da177e4 LT |
303 | } |
304 | ||
305 | /* clear out the damaged flags */ | |
306 | if (!dev->active) | |
f4490002 | 307 | pnp_init_resources(dev); |
1da177e4 | 308 | pnp_add_device(dev); |
9dd78466 | 309 | num++; |
1da177e4 LT |
310 | |
311 | return AE_OK; | |
1da177e4 LT |
312 | } |
313 | ||
314 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
315 | u32 lvl, void *context, |
316 | void **rv) | |
1da177e4 LT |
317 | { |
318 | struct acpi_device *device; | |
319 | ||
320 | if (!acpi_bus_get_device(handle, &device)) | |
321 | pnpacpi_add_device(device); | |
322 | else | |
323 | return AE_CTRL_DEPTH; | |
324 | return AE_OK; | |
325 | } | |
326 | ||
55955aad DB |
327 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
328 | { | |
9dd78466 BH |
329 | struct acpi_device *acpi = to_acpi_device(dev); |
330 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
331 | |
332 | /* true means it matched */ | |
1033f904 | 333 | return !acpi->physical_node_count |
ea8d82fd | 334 | && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); |
55955aad DB |
335 | } |
336 | ||
9dd78466 | 337 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 338 | { |
9dd78466 BH |
339 | struct device *adev; |
340 | struct acpi_device *acpi; | |
55955aad DB |
341 | |
342 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 343 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
344 | if (!adev) |
345 | return -ENODEV; | |
346 | ||
347 | acpi = to_acpi_device(adev); | |
348 | *handle = acpi->handle; | |
349 | put_device(adev); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | /* complete initialization of a PNPACPI device includes having | |
354 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
355 | */ | |
53540098 RW |
356 | static bool acpi_pnp_bus_match(struct device *dev) |
357 | { | |
358 | return dev->bus == &pnp_bus_type; | |
359 | } | |
360 | ||
55955aad | 361 | static struct acpi_bus_type __initdata acpi_pnp_bus = { |
53540098 RW |
362 | .name = "PNP", |
363 | .match = acpi_pnp_bus_match, | |
55955aad DB |
364 | .find_device = acpi_pnp_find_device, |
365 | }; | |
366 | ||
1da177e4 | 367 | int pnpacpi_disabled __initdata; |
b449f63c | 368 | static int __init pnpacpi_init(void) |
1da177e4 LT |
369 | { |
370 | if (acpi_disabled || pnpacpi_disabled) { | |
c865d2f6 | 371 | printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); |
1da177e4 LT |
372 | return 0; |
373 | } | |
c865d2f6 | 374 | printk(KERN_INFO "pnp: PnP ACPI init\n"); |
1da177e4 | 375 | pnp_register_protocol(&pnpacpi_protocol); |
55955aad | 376 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 | 377 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
c865d2f6 | 378 | printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); |
55955aad | 379 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 380 | pnp_platform_devices = 1; |
1da177e4 LT |
381 | return 0; |
382 | } | |
9dd78466 | 383 | |
ed458df4 | 384 | fs_initcall(pnpacpi_init); |
1da177e4 LT |
385 | |
386 | static int __init pnpacpi_setup(char *str) | |
387 | { | |
388 | if (str == NULL) | |
389 | return 1; | |
390 | if (!strncmp(str, "off", 3)) | |
391 | pnpacpi_disabled = 1; | |
392 | return 1; | |
393 | } | |
9dd78466 | 394 | |
1da177e4 | 395 | __setup("pnpacpi=", pnpacpi_setup); |