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 | |
1da177e4 LT |
22 | #include <linux/acpi.h> |
23 | #include <linux/pnp.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
29b71a1c | 25 | #include <linux/mod_devicetable.h> |
1da177e4 | 26 | #include <acpi/acpi_bus.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) \ | |
60 | if (!('@' <= (c) || (c) <= 'Z')) \ | |
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 | { |
c4da6940 BH |
84 | struct acpi_device *acpi_dev = dev->data; |
85 | acpi_handle handle = acpi_dev->handle; | |
1da177e4 | 86 | struct acpi_buffer buffer; |
cdef6254 | 87 | int ret; |
1da177e4 | 88 | |
2f53432c | 89 | pnp_dbg(&dev->dev, "set resources\n"); |
cdef6254 | 90 | ret = pnpacpi_build_resource_template(dev, &buffer); |
1da177e4 LT |
91 | if (ret) |
92 | return ret; | |
4ab55d8d | 93 | ret = pnpacpi_encode_resources(dev, &buffer); |
1da177e4 LT |
94 | if (ret) { |
95 | kfree(buffer.pointer); | |
96 | return ret; | |
97 | } | |
6328a574 | 98 | if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer))) |
1da177e4 | 99 | ret = -EINVAL; |
6328a574 WS |
100 | else if (acpi_bus_power_manageable(handle)) |
101 | ret = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
1da177e4 LT |
102 | kfree(buffer.pointer); |
103 | return ret; | |
104 | } | |
105 | ||
106 | static int pnpacpi_disable_resources(struct pnp_dev *dev) | |
107 | { | |
c4da6940 BH |
108 | struct acpi_device *acpi_dev = dev->data; |
109 | acpi_handle handle = acpi_dev->handle; | |
6328a574 WS |
110 | int ret; |
111 | ||
112 | dev_dbg(&dev->dev, "disable resources\n"); | |
55955aad | 113 | |
1da177e4 | 114 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
6328a574 | 115 | ret = 0; |
19bde778 LB |
116 | if (acpi_bus_power_manageable(handle)) |
117 | acpi_bus_set_power(handle, ACPI_STATE_D3); | |
118 | /* continue even if acpi_bus_set_power() fails */ | |
6328a574 WS |
119 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL))) |
120 | ret = -ENODEV; | |
121 | return ret; | |
1da177e4 LT |
122 | } |
123 | ||
673d5b43 | 124 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e AS |
125 | static bool pnpacpi_can_wakeup(struct pnp_dev *dev) |
126 | { | |
127 | struct acpi_device *acpi_dev = dev->data; | |
128 | acpi_handle handle = acpi_dev->handle; | |
129 | ||
130 | return acpi_bus_can_wakeup(handle); | |
131 | } | |
132 | ||
fc30e68e SL |
133 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
134 | { | |
c4da6940 BH |
135 | struct acpi_device *acpi_dev = dev->data; |
136 | acpi_handle handle = acpi_dev->handle; | |
36e02b62 RW |
137 | int power_state; |
138 | ||
b14e033e AS |
139 | if (device_can_wakeup(&dev->dev)) { |
140 | int rc = acpi_pm_device_sleep_wake(&dev->dev, | |
141 | device_may_wakeup(&dev->dev)); | |
142 | ||
143 | if (rc) | |
144 | return rc; | |
145 | } | |
2fe2de5f | 146 | power_state = acpi_pm_device_sleep_state(&dev->dev, NULL); |
36e02b62 RW |
147 | if (power_state < 0) |
148 | power_state = (state.event == PM_EVENT_ON) ? | |
149 | ACPI_STATE_D0 : ACPI_STATE_D3; | |
150 | ||
b14e033e AS |
151 | /* acpi_bus_set_power() often fails (keyboard port can't be |
152 | * powered-down?), and in any case, our return value is ignored | |
153 | * by pnp_bus_suspend(). Hence we don't revert the wakeup | |
154 | * setting if the set_power fails. | |
155 | */ | |
c4da6940 | 156 | return acpi_bus_set_power(handle, power_state); |
fc30e68e SL |
157 | } |
158 | ||
159 | static int pnpacpi_resume(struct pnp_dev *dev) | |
160 | { | |
c4da6940 BH |
161 | struct acpi_device *acpi_dev = dev->data; |
162 | acpi_handle handle = acpi_dev->handle; | |
163 | ||
b14e033e AS |
164 | if (device_may_wakeup(&dev->dev)) |
165 | acpi_pm_device_sleep_wake(&dev->dev, false); | |
c4da6940 | 166 | return acpi_bus_set_power(handle, ACPI_STATE_D0); |
fc30e68e | 167 | } |
673d5b43 | 168 | #endif |
fc30e68e | 169 | |
9065ce45 | 170 | struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
171 | .name = "Plug and Play ACPI", |
172 | .get = pnpacpi_get_resources, | |
173 | .set = pnpacpi_set_resources, | |
1da177e4 | 174 | .disable = pnpacpi_disable_resources, |
673d5b43 | 175 | #ifdef CONFIG_ACPI_SLEEP |
b14e033e | 176 | .can_wakeup = pnpacpi_can_wakeup, |
fc30e68e SL |
177 | .suspend = pnpacpi_suspend, |
178 | .resume = pnpacpi_resume, | |
673d5b43 | 179 | #endif |
1da177e4 | 180 | }; |
9065ce45 | 181 | EXPORT_SYMBOL(pnpacpi_protocol); |
1da177e4 | 182 | |
66c3ec4f | 183 | static char *__init pnpacpi_get_id(struct acpi_device *device) |
420a0f66 DT |
184 | { |
185 | struct acpi_hardware_id *id; | |
186 | ||
187 | list_for_each_entry(id, &device->pnp.ids, list) { | |
188 | if (ispnpidacpi(id->id)) | |
189 | return id->id; | |
190 | } | |
191 | ||
192 | return NULL; | |
193 | } | |
194 | ||
1da177e4 LT |
195 | static int __init pnpacpi_add_device(struct acpi_device *device) |
196 | { | |
197 | acpi_handle temp = NULL; | |
198 | acpi_status status; | |
1da177e4 | 199 | struct pnp_dev *dev; |
420a0f66 | 200 | char *pnpid; |
7f47fa6c | 201 | struct acpi_hardware_id *id; |
1da177e4 | 202 | |
39a0ad87 ZY |
203 | /* |
204 | * If a PnPacpi device is not present , the device | |
205 | * driver should not be loaded. | |
206 | */ | |
07b0120d | 207 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
420a0f66 DT |
208 | if (ACPI_FAILURE(status)) |
209 | return 0; | |
210 | ||
211 | pnpid = pnpacpi_get_id(device); | |
212 | if (!pnpid) | |
213 | return 0; | |
214 | ||
215 | if (is_exclusive_device(device) || !device->status.present) | |
1da177e4 LT |
216 | return 0; |
217 | ||
420a0f66 | 218 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid); |
bda1e4e5 | 219 | if (!dev) |
1da177e4 | 220 | return -ENOMEM; |
bda1e4e5 | 221 | |
c4da6940 | 222 | dev->data = device; |
07d4e9af | 223 | /* .enabled means the device can decode the resources */ |
1da177e4 LT |
224 | dev->active = device->status.enabled; |
225 | status = acpi_get_handle(device->handle, "_SRS", &temp); | |
226 | if (ACPI_SUCCESS(status)) | |
227 | dev->capabilities |= PNP_CONFIGURABLE; | |
228 | dev->capabilities |= PNP_READ; | |
856608ee | 229 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
230 | dev->capabilities |= PNP_WRITE; |
231 | if (device->flags.removable) | |
232 | dev->capabilities |= PNP_REMOVABLE; | |
233 | status = acpi_get_handle(device->handle, "_DIS", &temp); | |
234 | if (ACPI_SUCCESS(status)) | |
235 | dev->capabilities |= PNP_DISABLE; | |
236 | ||
1da177e4 LT |
237 | if (strlen(acpi_device_name(device))) |
238 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
239 | else | |
240 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
241 | ||
d152cf5d BH |
242 | if (dev->active) |
243 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 244 | |
d152cf5d BH |
245 | if (dev->capabilities & PNP_CONFIGURABLE) |
246 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 247 | |
7f47fa6c | 248 | list_for_each_entry(id, &device->pnp.ids, list) { |
420a0f66 | 249 | if (!strcmp(id->id, pnpid)) |
7f47fa6c BH |
250 | continue; |
251 | if (!ispnpidacpi(id->id)) | |
252 | continue; | |
253 | pnp_add_id(dev, id->id); | |
1da177e4 LT |
254 | } |
255 | ||
256 | /* clear out the damaged flags */ | |
257 | if (!dev->active) | |
f4490002 | 258 | pnp_init_resources(dev); |
1da177e4 | 259 | pnp_add_device(dev); |
9dd78466 | 260 | num++; |
1da177e4 LT |
261 | |
262 | return AE_OK; | |
1da177e4 LT |
263 | } |
264 | ||
265 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
266 | u32 lvl, void *context, |
267 | void **rv) | |
1da177e4 LT |
268 | { |
269 | struct acpi_device *device; | |
270 | ||
271 | if (!acpi_bus_get_device(handle, &device)) | |
272 | pnpacpi_add_device(device); | |
273 | else | |
274 | return AE_CTRL_DEPTH; | |
275 | return AE_OK; | |
276 | } | |
277 | ||
55955aad DB |
278 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
279 | { | |
9dd78466 BH |
280 | struct acpi_device *acpi = to_acpi_device(dev); |
281 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
282 | |
283 | /* true means it matched */ | |
1131b938 | 284 | return !acpi_get_physical_device(acpi->handle) |
ea8d82fd | 285 | && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); |
55955aad DB |
286 | } |
287 | ||
9dd78466 | 288 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 289 | { |
9dd78466 BH |
290 | struct device *adev; |
291 | struct acpi_device *acpi; | |
55955aad DB |
292 | |
293 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 294 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
295 | if (!adev) |
296 | return -ENODEV; | |
297 | ||
298 | acpi = to_acpi_device(adev); | |
299 | *handle = acpi->handle; | |
300 | put_device(adev); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* complete initialization of a PNPACPI device includes having | |
305 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
306 | */ | |
307 | static struct acpi_bus_type __initdata acpi_pnp_bus = { | |
07d4e9af | 308 | .bus = &pnp_bus_type, |
55955aad DB |
309 | .find_device = acpi_pnp_find_device, |
310 | }; | |
311 | ||
1da177e4 | 312 | int pnpacpi_disabled __initdata; |
b449f63c | 313 | static int __init pnpacpi_init(void) |
1da177e4 LT |
314 | { |
315 | if (acpi_disabled || pnpacpi_disabled) { | |
c865d2f6 | 316 | printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); |
1da177e4 LT |
317 | return 0; |
318 | } | |
c865d2f6 | 319 | printk(KERN_INFO "pnp: PnP ACPI init\n"); |
1da177e4 | 320 | pnp_register_protocol(&pnpacpi_protocol); |
55955aad | 321 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 | 322 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
c865d2f6 | 323 | printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); |
55955aad | 324 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 325 | pnp_platform_devices = 1; |
1da177e4 LT |
326 | return 0; |
327 | } | |
9dd78466 | 328 | |
ed458df4 | 329 | fs_initcall(pnpacpi_init); |
1da177e4 LT |
330 | |
331 | static int __init pnpacpi_setup(char *str) | |
332 | { | |
333 | if (str == NULL) | |
334 | return 1; | |
335 | if (!strncmp(str, "off", 3)) | |
336 | pnpacpi_disabled = 1; | |
337 | return 1; | |
338 | } | |
9dd78466 | 339 | |
1da177e4 | 340 | __setup("pnpacpi=", pnpacpi_setup); |