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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 | ||
31 | static int num = 0; | |
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 | |
62 | static int __init ispnpidacpi(char *id) | |
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 |
fc30e68e SL |
125 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
126 | { | |
c4da6940 BH |
127 | struct acpi_device *acpi_dev = dev->data; |
128 | acpi_handle handle = acpi_dev->handle; | |
36e02b62 RW |
129 | int power_state; |
130 | ||
2fe2de5f | 131 | power_state = acpi_pm_device_sleep_state(&dev->dev, NULL); |
36e02b62 RW |
132 | if (power_state < 0) |
133 | power_state = (state.event == PM_EVENT_ON) ? | |
134 | ACPI_STATE_D0 : ACPI_STATE_D3; | |
135 | ||
c4da6940 | 136 | return acpi_bus_set_power(handle, power_state); |
fc30e68e SL |
137 | } |
138 | ||
139 | static int pnpacpi_resume(struct pnp_dev *dev) | |
140 | { | |
c4da6940 BH |
141 | struct acpi_device *acpi_dev = dev->data; |
142 | acpi_handle handle = acpi_dev->handle; | |
143 | ||
144 | return acpi_bus_set_power(handle, ACPI_STATE_D0); | |
fc30e68e | 145 | } |
673d5b43 | 146 | #endif |
fc30e68e | 147 | |
9065ce45 | 148 | struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
149 | .name = "Plug and Play ACPI", |
150 | .get = pnpacpi_get_resources, | |
151 | .set = pnpacpi_set_resources, | |
1da177e4 | 152 | .disable = pnpacpi_disable_resources, |
673d5b43 | 153 | #ifdef CONFIG_ACPI_SLEEP |
fc30e68e SL |
154 | .suspend = pnpacpi_suspend, |
155 | .resume = pnpacpi_resume, | |
673d5b43 | 156 | #endif |
1da177e4 | 157 | }; |
9065ce45 | 158 | EXPORT_SYMBOL(pnpacpi_protocol); |
1da177e4 LT |
159 | |
160 | static int __init pnpacpi_add_device(struct acpi_device *device) | |
161 | { | |
162 | acpi_handle temp = NULL; | |
163 | acpi_status status; | |
1da177e4 | 164 | struct pnp_dev *dev; |
7f47fa6c | 165 | struct acpi_hardware_id *id; |
1da177e4 | 166 | |
39a0ad87 ZY |
167 | /* |
168 | * If a PnPacpi device is not present , the device | |
169 | * driver should not be loaded. | |
170 | */ | |
07b0120d | 171 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
172 | if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) || | |
39a0ad87 | 173 | is_exclusive_device(device) || (!device->status.present)) |
1da177e4 LT |
174 | return 0; |
175 | ||
bda1e4e5 BH |
176 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device)); |
177 | if (!dev) | |
1da177e4 | 178 | return -ENOMEM; |
bda1e4e5 | 179 | |
c4da6940 | 180 | dev->data = device; |
07d4e9af | 181 | /* .enabled means the device can decode the resources */ |
1da177e4 LT |
182 | dev->active = device->status.enabled; |
183 | status = acpi_get_handle(device->handle, "_SRS", &temp); | |
184 | if (ACPI_SUCCESS(status)) | |
185 | dev->capabilities |= PNP_CONFIGURABLE; | |
186 | dev->capabilities |= PNP_READ; | |
856608ee | 187 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
188 | dev->capabilities |= PNP_WRITE; |
189 | if (device->flags.removable) | |
190 | dev->capabilities |= PNP_REMOVABLE; | |
191 | status = acpi_get_handle(device->handle, "_DIS", &temp); | |
192 | if (ACPI_SUCCESS(status)) | |
193 | dev->capabilities |= PNP_DISABLE; | |
194 | ||
1da177e4 LT |
195 | if (strlen(acpi_device_name(device))) |
196 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
197 | else | |
198 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
199 | ||
d152cf5d BH |
200 | if (dev->active) |
201 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 202 | |
d152cf5d BH |
203 | if (dev->capabilities & PNP_CONFIGURABLE) |
204 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 205 | |
7f47fa6c BH |
206 | list_for_each_entry(id, &device->pnp.ids, list) { |
207 | if (!strcmp(id->id, acpi_device_hid(device))) | |
208 | continue; | |
209 | if (!ispnpidacpi(id->id)) | |
210 | continue; | |
211 | pnp_add_id(dev, id->id); | |
1da177e4 LT |
212 | } |
213 | ||
214 | /* clear out the damaged flags */ | |
215 | if (!dev->active) | |
f4490002 | 216 | pnp_init_resources(dev); |
1da177e4 | 217 | pnp_add_device(dev); |
9dd78466 | 218 | num++; |
1da177e4 LT |
219 | |
220 | return AE_OK; | |
1da177e4 LT |
221 | } |
222 | ||
223 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
224 | u32 lvl, void *context, |
225 | void **rv) | |
1da177e4 LT |
226 | { |
227 | struct acpi_device *device; | |
228 | ||
229 | if (!acpi_bus_get_device(handle, &device)) | |
230 | pnpacpi_add_device(device); | |
231 | else | |
232 | return AE_CTRL_DEPTH; | |
233 | return AE_OK; | |
234 | } | |
235 | ||
55955aad DB |
236 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
237 | { | |
9dd78466 BH |
238 | struct acpi_device *acpi = to_acpi_device(dev); |
239 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
240 | |
241 | /* true means it matched */ | |
1131b938 | 242 | return !acpi_get_physical_device(acpi->handle) |
ea8d82fd | 243 | && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); |
55955aad DB |
244 | } |
245 | ||
9dd78466 | 246 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 247 | { |
9dd78466 BH |
248 | struct device *adev; |
249 | struct acpi_device *acpi; | |
55955aad DB |
250 | |
251 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 252 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
253 | if (!adev) |
254 | return -ENODEV; | |
255 | ||
256 | acpi = to_acpi_device(adev); | |
257 | *handle = acpi->handle; | |
258 | put_device(adev); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | /* complete initialization of a PNPACPI device includes having | |
263 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
264 | */ | |
265 | static struct acpi_bus_type __initdata acpi_pnp_bus = { | |
07d4e9af | 266 | .bus = &pnp_bus_type, |
55955aad DB |
267 | .find_device = acpi_pnp_find_device, |
268 | }; | |
269 | ||
1da177e4 | 270 | int pnpacpi_disabled __initdata; |
b449f63c | 271 | static int __init pnpacpi_init(void) |
1da177e4 LT |
272 | { |
273 | if (acpi_disabled || pnpacpi_disabled) { | |
c865d2f6 | 274 | printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); |
1da177e4 LT |
275 | return 0; |
276 | } | |
c865d2f6 | 277 | printk(KERN_INFO "pnp: PnP ACPI init\n"); |
1da177e4 | 278 | pnp_register_protocol(&pnpacpi_protocol); |
55955aad | 279 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 | 280 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
c865d2f6 | 281 | printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); |
55955aad | 282 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 283 | pnp_platform_devices = 1; |
1da177e4 LT |
284 | return 0; |
285 | } | |
9dd78466 | 286 | |
ed458df4 | 287 | fs_initcall(pnpacpi_init); |
1da177e4 LT |
288 | |
289 | static int __init pnpacpi_setup(char *str) | |
290 | { | |
291 | if (str == NULL) | |
292 | return 1; | |
293 | if (!strncmp(str, "off", 3)) | |
294 | pnpacpi_disabled = 1; | |
295 | return 1; | |
296 | } | |
9dd78466 | 297 | |
1da177e4 | 298 | __setup("pnpacpi=", pnpacpi_setup); |