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> | |
29b71a1c | 24 | #include <linux/mod_devicetable.h> |
1da177e4 | 25 | #include <acpi/acpi_bus.h> |
29b71a1c | 26 | |
1692b27b | 27 | #include "../base.h" |
1da177e4 LT |
28 | #include "pnpacpi.h" |
29 | ||
30 | static int num = 0; | |
31 | ||
c4bb6f5a | 32 | /* We need only to blacklist devices that have already an acpi driver that |
33 | * can't use pnp layer. We don't need to blacklist device that are directly | |
34 | * used by the kernel (PCI root, ...), as it is harmless and there were | |
35 | * already present in pnpbios. But there is an exception for devices that | |
36 | * have irqs (PIC, Timer) because we call acpi_register_gsi. | |
07d4e9af | 37 | * Finally, only devices that have a CRS method need to be in this list. |
c4bb6f5a | 38 | */ |
6bf69b5e | 39 | static struct acpi_device_id excluded_id_list[] __initdata = { |
9dd78466 BH |
40 | {"PNP0C09", 0}, /* EC */ |
41 | {"PNP0C0F", 0}, /* Link device */ | |
42 | {"PNP0000", 0}, /* PIC */ | |
43 | {"PNP0100", 0}, /* Timer */ | |
29b71a1c TR |
44 | {"", 0}, |
45 | }; | |
46 | ||
9448b0d4 | 47 | static inline int __init is_exclusive_device(struct acpi_device *dev) |
1da177e4 | 48 | { |
29b71a1c | 49 | return (!acpi_match_device_ids(dev, excluded_id_list)); |
1da177e4 LT |
50 | } |
51 | ||
1da177e4 LT |
52 | /* |
53 | * Compatible Device IDs | |
54 | */ | |
55 | #define TEST_HEX(c) \ | |
56 | if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ | |
57 | return 0 | |
58 | #define TEST_ALPHA(c) \ | |
59 | if (!('@' <= (c) || (c) <= 'Z')) \ | |
60 | return 0 | |
61 | static int __init ispnpidacpi(char *id) | |
62 | { | |
63 | TEST_ALPHA(id[0]); | |
64 | TEST_ALPHA(id[1]); | |
65 | TEST_ALPHA(id[2]); | |
66 | TEST_HEX(id[3]); | |
67 | TEST_HEX(id[4]); | |
68 | TEST_HEX(id[5]); | |
69 | TEST_HEX(id[6]); | |
70 | if (id[7] != '\0') | |
71 | return 0; | |
72 | return 1; | |
73 | } | |
74 | ||
59284cb4 | 75 | static int pnpacpi_get_resources(struct pnp_dev *dev) |
1da177e4 | 76 | { |
2f53432c | 77 | pnp_dbg(&dev->dev, "get resources\n"); |
d152cf5d | 78 | return pnpacpi_parse_allocated_resource(dev); |
1da177e4 LT |
79 | } |
80 | ||
59284cb4 | 81 | static int pnpacpi_set_resources(struct pnp_dev *dev) |
1da177e4 LT |
82 | { |
83 | acpi_handle handle = dev->data; | |
84 | struct acpi_buffer buffer; | |
cdef6254 | 85 | int ret; |
1da177e4 | 86 | |
2f53432c | 87 | pnp_dbg(&dev->dev, "set resources\n"); |
cdef6254 | 88 | ret = pnpacpi_build_resource_template(dev, &buffer); |
1da177e4 LT |
89 | if (ret) |
90 | return ret; | |
4ab55d8d | 91 | ret = pnpacpi_encode_resources(dev, &buffer); |
1da177e4 LT |
92 | if (ret) { |
93 | kfree(buffer.pointer); | |
94 | return ret; | |
95 | } | |
6328a574 | 96 | if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer))) |
1da177e4 | 97 | ret = -EINVAL; |
6328a574 WS |
98 | else if (acpi_bus_power_manageable(handle)) |
99 | ret = acpi_bus_set_power(handle, ACPI_STATE_D0); | |
1da177e4 LT |
100 | kfree(buffer.pointer); |
101 | return ret; | |
102 | } | |
103 | ||
104 | static int pnpacpi_disable_resources(struct pnp_dev *dev) | |
105 | { | |
6328a574 WS |
106 | acpi_handle handle = dev->data; |
107 | int ret; | |
108 | ||
109 | dev_dbg(&dev->dev, "disable resources\n"); | |
55955aad | 110 | |
1da177e4 | 111 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
6328a574 | 112 | ret = 0; |
19bde778 LB |
113 | if (acpi_bus_power_manageable(handle)) |
114 | acpi_bus_set_power(handle, ACPI_STATE_D3); | |
115 | /* continue even if acpi_bus_set_power() fails */ | |
6328a574 WS |
116 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL))) |
117 | ret = -ENODEV; | |
118 | return ret; | |
1da177e4 LT |
119 | } |
120 | ||
673d5b43 | 121 | #ifdef CONFIG_ACPI_SLEEP |
fc30e68e SL |
122 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
123 | { | |
36e02b62 RW |
124 | int power_state; |
125 | ||
2fe2de5f | 126 | power_state = acpi_pm_device_sleep_state(&dev->dev, NULL); |
36e02b62 RW |
127 | if (power_state < 0) |
128 | power_state = (state.event == PM_EVENT_ON) ? | |
129 | ACPI_STATE_D0 : ACPI_STATE_D3; | |
130 | ||
131 | return acpi_bus_set_power((acpi_handle) dev->data, power_state); | |
fc30e68e SL |
132 | } |
133 | ||
134 | static int pnpacpi_resume(struct pnp_dev *dev) | |
135 | { | |
9dd78466 | 136 | return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0); |
fc30e68e | 137 | } |
673d5b43 | 138 | #endif |
fc30e68e | 139 | |
b449f63c | 140 | static struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
141 | .name = "Plug and Play ACPI", |
142 | .get = pnpacpi_get_resources, | |
143 | .set = pnpacpi_set_resources, | |
1da177e4 | 144 | .disable = pnpacpi_disable_resources, |
673d5b43 | 145 | #ifdef CONFIG_ACPI_SLEEP |
fc30e68e SL |
146 | .suspend = pnpacpi_suspend, |
147 | .resume = pnpacpi_resume, | |
673d5b43 | 148 | #endif |
1da177e4 LT |
149 | }; |
150 | ||
151 | static int __init pnpacpi_add_device(struct acpi_device *device) | |
152 | { | |
153 | acpi_handle temp = NULL; | |
154 | acpi_status status; | |
1da177e4 | 155 | struct pnp_dev *dev; |
7f47fa6c | 156 | struct acpi_hardware_id *id; |
1da177e4 | 157 | |
39a0ad87 ZY |
158 | /* |
159 | * If a PnPacpi device is not present , the device | |
160 | * driver should not be loaded. | |
161 | */ | |
07b0120d | 162 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
163 | if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) || | |
39a0ad87 | 164 | is_exclusive_device(device) || (!device->status.present)) |
1da177e4 LT |
165 | return 0; |
166 | ||
bda1e4e5 BH |
167 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device)); |
168 | if (!dev) | |
1da177e4 | 169 | return -ENOMEM; |
bda1e4e5 | 170 | |
1da177e4 | 171 | dev->data = device->handle; |
07d4e9af | 172 | /* .enabled means the device can decode the resources */ |
1da177e4 LT |
173 | dev->active = device->status.enabled; |
174 | status = acpi_get_handle(device->handle, "_SRS", &temp); | |
175 | if (ACPI_SUCCESS(status)) | |
176 | dev->capabilities |= PNP_CONFIGURABLE; | |
177 | dev->capabilities |= PNP_READ; | |
856608ee | 178 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
179 | dev->capabilities |= PNP_WRITE; |
180 | if (device->flags.removable) | |
181 | dev->capabilities |= PNP_REMOVABLE; | |
182 | status = acpi_get_handle(device->handle, "_DIS", &temp); | |
183 | if (ACPI_SUCCESS(status)) | |
184 | dev->capabilities |= PNP_DISABLE; | |
185 | ||
1da177e4 LT |
186 | if (strlen(acpi_device_name(device))) |
187 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
188 | else | |
189 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
190 | ||
d152cf5d BH |
191 | if (dev->active) |
192 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 193 | |
d152cf5d BH |
194 | if (dev->capabilities & PNP_CONFIGURABLE) |
195 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 196 | |
7f47fa6c BH |
197 | list_for_each_entry(id, &device->pnp.ids, list) { |
198 | if (!strcmp(id->id, acpi_device_hid(device))) | |
199 | continue; | |
200 | if (!ispnpidacpi(id->id)) | |
201 | continue; | |
202 | pnp_add_id(dev, id->id); | |
1da177e4 LT |
203 | } |
204 | ||
205 | /* clear out the damaged flags */ | |
206 | if (!dev->active) | |
f4490002 | 207 | pnp_init_resources(dev); |
1da177e4 | 208 | pnp_add_device(dev); |
9dd78466 | 209 | num++; |
1da177e4 LT |
210 | |
211 | return AE_OK; | |
1da177e4 LT |
212 | } |
213 | ||
214 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
215 | u32 lvl, void *context, |
216 | void **rv) | |
1da177e4 LT |
217 | { |
218 | struct acpi_device *device; | |
219 | ||
220 | if (!acpi_bus_get_device(handle, &device)) | |
221 | pnpacpi_add_device(device); | |
222 | else | |
223 | return AE_CTRL_DEPTH; | |
224 | return AE_OK; | |
225 | } | |
226 | ||
55955aad DB |
227 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
228 | { | |
9dd78466 BH |
229 | struct acpi_device *acpi = to_acpi_device(dev); |
230 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
231 | |
232 | /* true means it matched */ | |
1131b938 | 233 | return !acpi_get_physical_device(acpi->handle) |
ea8d82fd | 234 | && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); |
55955aad DB |
235 | } |
236 | ||
9dd78466 | 237 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 238 | { |
9dd78466 BH |
239 | struct device *adev; |
240 | struct acpi_device *acpi; | |
55955aad DB |
241 | |
242 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 243 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
244 | if (!adev) |
245 | return -ENODEV; | |
246 | ||
247 | acpi = to_acpi_device(adev); | |
248 | *handle = acpi->handle; | |
249 | put_device(adev); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | /* complete initialization of a PNPACPI device includes having | |
254 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
255 | */ | |
256 | static struct acpi_bus_type __initdata acpi_pnp_bus = { | |
07d4e9af | 257 | .bus = &pnp_bus_type, |
55955aad DB |
258 | .find_device = acpi_pnp_find_device, |
259 | }; | |
260 | ||
1da177e4 | 261 | int pnpacpi_disabled __initdata; |
b449f63c | 262 | static int __init pnpacpi_init(void) |
1da177e4 LT |
263 | { |
264 | if (acpi_disabled || pnpacpi_disabled) { | |
c865d2f6 | 265 | printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); |
1da177e4 LT |
266 | return 0; |
267 | } | |
c865d2f6 | 268 | printk(KERN_INFO "pnp: PnP ACPI init\n"); |
1da177e4 | 269 | pnp_register_protocol(&pnpacpi_protocol); |
55955aad | 270 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 | 271 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
c865d2f6 | 272 | printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); |
55955aad | 273 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 274 | pnp_platform_devices = 1; |
1da177e4 LT |
275 | return 0; |
276 | } | |
9dd78466 | 277 | |
ed458df4 | 278 | fs_initcall(pnpacpi_init); |
1da177e4 LT |
279 | |
280 | static int __init pnpacpi_setup(char *str) | |
281 | { | |
282 | if (str == NULL) | |
283 | return 1; | |
284 | if (!strncmp(str, "off", 3)) | |
285 | pnpacpi_disabled = 1; | |
286 | return 1; | |
287 | } | |
9dd78466 | 288 | |
1da177e4 | 289 | __setup("pnpacpi=", pnpacpi_setup); |