Commit | Line | Data |
---|---|---|
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> |
29b71a1c | 27 | |
1692b27b | 28 | #include "../base.h" |
1da177e4 LT |
29 | #include "pnpacpi.h" |
30 | ||
420a0f66 | 31 | static int num; |
1da177e4 | 32 | |
c4bb6f5a | 33 | /* We need only to blacklist devices that have already an acpi driver that |
34 | * can't use pnp layer. We don't need to blacklist device that are directly | |
35 | * used by the kernel (PCI root, ...), as it is harmless and there were | |
36 | * already present in pnpbios. But there is an exception for devices that | |
37 | * have irqs (PIC, Timer) because we call acpi_register_gsi. | |
07d4e9af | 38 | * Finally, only devices that have a CRS method need to be in this list. |
c4bb6f5a | 39 | */ |
6bf69b5e | 40 | static struct acpi_device_id excluded_id_list[] __initdata = { |
9dd78466 BH |
41 | {"PNP0C09", 0}, /* EC */ |
42 | {"PNP0C0F", 0}, /* Link device */ | |
43 | {"PNP0000", 0}, /* PIC */ | |
44 | {"PNP0100", 0}, /* Timer */ | |
29b71a1c TR |
45 | {"", 0}, |
46 | }; | |
47 | ||
9448b0d4 | 48 | static inline int __init is_exclusive_device(struct acpi_device *dev) |
1da177e4 | 49 | { |
29b71a1c | 50 | return (!acpi_match_device_ids(dev, excluded_id_list)); |
1da177e4 LT |
51 | } |
52 | ||
1da177e4 LT |
53 | /* |
54 | * Compatible Device IDs | |
55 | */ | |
56 | #define TEST_HEX(c) \ | |
57 | if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ | |
58 | return 0 | |
59 | #define TEST_ALPHA(c) \ | |
cdc87c5a | 60 | if (!('A' <= (c) && (c) <= 'Z')) \ |
1da177e4 | 61 | return 0 |
620e112c | 62 | static int __init ispnpidacpi(const char *id) |
1da177e4 LT |
63 | { |
64 | TEST_ALPHA(id[0]); | |
65 | TEST_ALPHA(id[1]); | |
66 | TEST_ALPHA(id[2]); | |
67 | TEST_HEX(id[3]); | |
68 | TEST_HEX(id[4]); | |
69 | TEST_HEX(id[5]); | |
70 | TEST_HEX(id[6]); | |
71 | if (id[7] != '\0') | |
72 | return 0; | |
73 | return 1; | |
74 | } | |
75 | ||
59284cb4 | 76 | static int pnpacpi_get_resources(struct pnp_dev *dev) |
1da177e4 | 77 | { |
2f53432c | 78 | pnp_dbg(&dev->dev, "get resources\n"); |
d152cf5d | 79 | return pnpacpi_parse_allocated_resource(dev); |
1da177e4 LT |
80 | } |
81 | ||
59284cb4 | 82 | static int pnpacpi_set_resources(struct pnp_dev *dev) |
1da177e4 | 83 | { |
cc8e7a35 RW |
84 | struct acpi_device *acpi_dev; |
85 | acpi_handle handle; | |
1da177e4 | 86 | struct acpi_buffer buffer; |
cdef6254 | 87 | int ret; |
1da177e4 | 88 | |
2f53432c | 89 | pnp_dbg(&dev->dev, "set resources\n"); |
cc8e7a35 | 90 | |
3a83f992 | 91 | handle = ACPI_HANDLE(&dev->dev); |
cfc57557 | 92 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
93 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
94 | return -ENODEV; | |
95 | } | |
96 | ||
a6b5e88c RW |
97 | if (WARN_ON_ONCE(acpi_dev != dev->data)) |
98 | dev->data = acpi_dev; | |
99 | ||
cdef6254 | 100 | ret = pnpacpi_build_resource_template(dev, &buffer); |
1da177e4 LT |
101 | if (ret) |
102 | return ret; | |
4ab55d8d | 103 | ret = pnpacpi_encode_resources(dev, &buffer); |
1da177e4 LT |
104 | if (ret) { |
105 | kfree(buffer.pointer); | |
106 | return ret; | |
107 | } | |
6328a574 | 108 | if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer))) |
1da177e4 | 109 | ret = -EINVAL; |
6328a574 WS |
110 | else if (acpi_bus_power_manageable(handle)) |
111 | ret = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
1da177e4 LT |
112 | kfree(buffer.pointer); |
113 | return ret; | |
114 | } | |
115 | ||
116 | static int pnpacpi_disable_resources(struct pnp_dev *dev) | |
117 | { | |
cc8e7a35 RW |
118 | struct acpi_device *acpi_dev; |
119 | acpi_handle handle; | |
6328a574 WS |
120 | int ret; |
121 | ||
122 | dev_dbg(&dev->dev, "disable resources\n"); | |
55955aad | 123 | |
3a83f992 | 124 | handle = ACPI_HANDLE(&dev->dev); |
cfc57557 | 125 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
126 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
127 | return 0; | |
128 | } | |
129 | ||
1da177e4 | 130 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
6328a574 | 131 | ret = 0; |
19bde778 | 132 | if (acpi_bus_power_manageable(handle)) |
8ad928d5 | 133 | acpi_bus_set_power(handle, ACPI_STATE_D3_COLD); |
19bde778 | 134 | /* continue even if acpi_bus_set_power() fails */ |
6328a574 WS |
135 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL))) |
136 | ret = -ENODEV; | |
137 | return ret; | |
1da177e4 LT |
138 | } |
139 | ||
673d5b43 | 140 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e AS |
141 | static bool pnpacpi_can_wakeup(struct pnp_dev *dev) |
142 | { | |
cc8e7a35 RW |
143 | struct acpi_device *acpi_dev; |
144 | acpi_handle handle; | |
145 | ||
3a83f992 | 146 | handle = ACPI_HANDLE(&dev->dev); |
cfc57557 | 147 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
148 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
149 | return false; | |
150 | } | |
b14e033e AS |
151 | |
152 | return acpi_bus_can_wakeup(handle); | |
153 | } | |
154 | ||
fc30e68e SL |
155 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
156 | { | |
cc8e7a35 RW |
157 | struct acpi_device *acpi_dev; |
158 | acpi_handle handle; | |
159 | int error = 0; | |
160 | ||
3a83f992 | 161 | handle = ACPI_HANDLE(&dev->dev); |
cfc57557 | 162 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
163 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
164 | return 0; | |
165 | } | |
36e02b62 | 166 | |
b14e033e | 167 | if (device_can_wakeup(&dev->dev)) { |
cc8e7a35 | 168 | error = acpi_pm_device_sleep_wake(&dev->dev, |
b14e033e | 169 | device_may_wakeup(&dev->dev)); |
cc8e7a35 RW |
170 | if (error) |
171 | return error; | |
172 | } | |
173 | ||
174 | if (acpi_bus_power_manageable(handle)) { | |
ee85f543 | 175 | int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL, |
8ad928d5 | 176 | ACPI_STATE_D3_COLD); |
cc8e7a35 RW |
177 | if (power_state < 0) |
178 | power_state = (state.event == PM_EVENT_ON) ? | |
8ad928d5 | 179 | ACPI_STATE_D0 : ACPI_STATE_D3_COLD; |
cc8e7a35 RW |
180 | |
181 | /* | |
182 | * acpi_bus_set_power() often fails (keyboard port can't be | |
183 | * powered-down?), and in any case, our return value is ignored | |
184 | * by pnp_bus_suspend(). Hence we don't revert the wakeup | |
185 | * setting if the set_power fails. | |
186 | */ | |
187 | error = acpi_bus_set_power(handle, power_state); | |
b14e033e | 188 | } |
cc8e7a35 RW |
189 | |
190 | return error; | |
fc30e68e SL |
191 | } |
192 | ||
193 | static int pnpacpi_resume(struct pnp_dev *dev) | |
194 | { | |
cc8e7a35 | 195 | struct acpi_device *acpi_dev; |
3a83f992 | 196 | acpi_handle handle = ACPI_HANDLE(&dev->dev); |
cc8e7a35 RW |
197 | int error = 0; |
198 | ||
cfc57557 | 199 | if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { |
cc8e7a35 RW |
200 | dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); |
201 | return -ENODEV; | |
202 | } | |
c4da6940 | 203 | |
b14e033e AS |
204 | if (device_may_wakeup(&dev->dev)) |
205 | acpi_pm_device_sleep_wake(&dev->dev, false); | |
cc8e7a35 RW |
206 | |
207 | if (acpi_bus_power_manageable(handle)) | |
208 | error = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
209 | ||
210 | return error; | |
fc30e68e | 211 | } |
673d5b43 | 212 | #endif |
fc30e68e | 213 | |
9065ce45 | 214 | struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
215 | .name = "Plug and Play ACPI", |
216 | .get = pnpacpi_get_resources, | |
217 | .set = pnpacpi_set_resources, | |
1da177e4 | 218 | .disable = pnpacpi_disable_resources, |
673d5b43 | 219 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e | 220 | .can_wakeup = pnpacpi_can_wakeup, |
fc30e68e SL |
221 | .suspend = pnpacpi_suspend, |
222 | .resume = pnpacpi_resume, | |
673d5b43 | 223 | #endif |
1da177e4 | 224 | }; |
9065ce45 | 225 | EXPORT_SYMBOL(pnpacpi_protocol); |
1da177e4 | 226 | |
66c3ec4f | 227 | static char *__init pnpacpi_get_id(struct acpi_device *device) |
420a0f66 DT |
228 | { |
229 | struct acpi_hardware_id *id; | |
230 | ||
231 | list_for_each_entry(id, &device->pnp.ids, list) { | |
232 | if (ispnpidacpi(id->id)) | |
233 | return id->id; | |
234 | } | |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | static int __init pnpacpi_add_device(struct acpi_device *device) |
240 | { | |
1da177e4 | 241 | struct pnp_dev *dev; |
420a0f66 | 242 | char *pnpid; |
7f47fa6c | 243 | struct acpi_hardware_id *id; |
1da177e4 | 244 | |
29058753 AH |
245 | /* Skip devices that are already bound */ |
246 | if (device->physical_node_count) | |
247 | return 0; | |
248 | ||
39a0ad87 ZY |
249 | /* |
250 | * If a PnPacpi device is not present , the device | |
251 | * driver should not be loaded. | |
252 | */ | |
0e77e2c4 | 253 | if (!acpi_has_method(device->handle, "_CRS")) |
420a0f66 DT |
254 | return 0; |
255 | ||
256 | pnpid = pnpacpi_get_id(device); | |
257 | if (!pnpid) | |
258 | return 0; | |
259 | ||
260 | if (is_exclusive_device(device) || !device->status.present) | |
1da177e4 LT |
261 | return 0; |
262 | ||
420a0f66 | 263 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid); |
bda1e4e5 | 264 | if (!dev) |
1da177e4 | 265 | return -ENOMEM; |
bda1e4e5 | 266 | |
c4da6940 | 267 | dev->data = device; |
07d4e9af | 268 | /* .enabled means the device can decode the resources */ |
1da177e4 | 269 | dev->active = device->status.enabled; |
0e77e2c4 | 270 | if (acpi_has_method(device->handle, "_SRS")) |
1da177e4 LT |
271 | dev->capabilities |= PNP_CONFIGURABLE; |
272 | dev->capabilities |= PNP_READ; | |
856608ee | 273 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
274 | dev->capabilities |= PNP_WRITE; |
275 | if (device->flags.removable) | |
276 | dev->capabilities |= PNP_REMOVABLE; | |
0e77e2c4 | 277 | if (acpi_has_method(device->handle, "_DIS")) |
1da177e4 LT |
278 | dev->capabilities |= PNP_DISABLE; |
279 | ||
1da177e4 LT |
280 | if (strlen(acpi_device_name(device))) |
281 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
282 | else | |
283 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
284 | ||
d152cf5d BH |
285 | if (dev->active) |
286 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 287 | |
d152cf5d BH |
288 | if (dev->capabilities & PNP_CONFIGURABLE) |
289 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 290 | |
7f47fa6c | 291 | list_for_each_entry(id, &device->pnp.ids, list) { |
420a0f66 | 292 | if (!strcmp(id->id, pnpid)) |
7f47fa6c BH |
293 | continue; |
294 | if (!ispnpidacpi(id->id)) | |
295 | continue; | |
296 | pnp_add_id(dev, id->id); | |
1da177e4 LT |
297 | } |
298 | ||
299 | /* clear out the damaged flags */ | |
300 | if (!dev->active) | |
f4490002 | 301 | pnp_init_resources(dev); |
1da177e4 | 302 | pnp_add_device(dev); |
9dd78466 | 303 | num++; |
1da177e4 LT |
304 | |
305 | return AE_OK; | |
1da177e4 LT |
306 | } |
307 | ||
308 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
309 | u32 lvl, void *context, |
310 | void **rv) | |
1da177e4 LT |
311 | { |
312 | struct acpi_device *device; | |
313 | ||
314 | if (!acpi_bus_get_device(handle, &device)) | |
315 | pnpacpi_add_device(device); | |
316 | else | |
317 | return AE_CTRL_DEPTH; | |
318 | return AE_OK; | |
319 | } | |
320 | ||
55955aad DB |
321 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
322 | { | |
9dd78466 BH |
323 | struct acpi_device *acpi = to_acpi_device(dev); |
324 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
325 | |
326 | /* true means it matched */ | |
1033f904 | 327 | return !acpi->physical_node_count |
ea8d82fd | 328 | && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); |
55955aad DB |
329 | } |
330 | ||
9dd78466 | 331 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 332 | { |
9dd78466 BH |
333 | struct device *adev; |
334 | struct acpi_device *acpi; | |
55955aad DB |
335 | |
336 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 337 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
338 | if (!adev) |
339 | return -ENODEV; | |
340 | ||
341 | acpi = to_acpi_device(adev); | |
342 | *handle = acpi->handle; | |
343 | put_device(adev); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | /* complete initialization of a PNPACPI device includes having | |
348 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
349 | */ | |
53540098 RW |
350 | static bool acpi_pnp_bus_match(struct device *dev) |
351 | { | |
352 | return dev->bus == &pnp_bus_type; | |
353 | } | |
354 | ||
55955aad | 355 | static struct acpi_bus_type __initdata acpi_pnp_bus = { |
53540098 RW |
356 | .name = "PNP", |
357 | .match = acpi_pnp_bus_match, | |
55955aad DB |
358 | .find_device = acpi_pnp_find_device, |
359 | }; | |
360 | ||
1da177e4 | 361 | int pnpacpi_disabled __initdata; |
b449f63c | 362 | static int __init pnpacpi_init(void) |
1da177e4 LT |
363 | { |
364 | if (acpi_disabled || pnpacpi_disabled) { | |
c865d2f6 | 365 | printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); |
1da177e4 LT |
366 | return 0; |
367 | } | |
c865d2f6 | 368 | printk(KERN_INFO "pnp: PnP ACPI init\n"); |
1da177e4 | 369 | pnp_register_protocol(&pnpacpi_protocol); |
55955aad | 370 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 | 371 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
c865d2f6 | 372 | printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); |
55955aad | 373 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 374 | pnp_platform_devices = 1; |
1da177e4 LT |
375 | return 0; |
376 | } | |
9dd78466 | 377 | |
ed458df4 | 378 | fs_initcall(pnpacpi_init); |
1da177e4 LT |
379 | |
380 | static int __init pnpacpi_setup(char *str) | |
381 | { | |
382 | if (str == NULL) | |
383 | return 1; | |
384 | if (!strncmp(str, "off", 3)) | |
385 | pnpacpi_disabled = 1; | |
386 | return 1; | |
387 | } | |
9dd78466 | 388 | |
1da177e4 | 389 | __setup("pnpacpi=", pnpacpi_setup); |