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 TR |
26 | #include <acpi/actypes.h> |
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 | { |
72dcc883 | 78 | dev_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 LT |
83 | { |
84 | acpi_handle handle = dev->data; | |
85 | struct acpi_buffer buffer; | |
cdef6254 | 86 | int ret; |
1da177e4 LT |
87 | acpi_status status; |
88 | ||
72dcc883 | 89 | dev_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 | } | |
98 | status = acpi_set_current_resources(handle, &buffer); | |
99 | if (ACPI_FAILURE(status)) | |
100 | ret = -EINVAL; | |
101 | kfree(buffer.pointer); | |
102 | return ret; | |
103 | } | |
104 | ||
105 | static int pnpacpi_disable_resources(struct pnp_dev *dev) | |
106 | { | |
107 | acpi_status status; | |
55955aad | 108 | |
1da177e4 | 109 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
9dd78466 BH |
110 | status = acpi_evaluate_object((acpi_handle) dev->data, |
111 | "_DIS", NULL, NULL); | |
1da177e4 LT |
112 | return ACPI_FAILURE(status) ? -ENODEV : 0; |
113 | } | |
114 | ||
673d5b43 | 115 | #ifdef CONFIG_ACPI_SLEEP |
fc30e68e SL |
116 | static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) |
117 | { | |
36e02b62 RW |
118 | int power_state; |
119 | ||
2fe2de5f | 120 | power_state = acpi_pm_device_sleep_state(&dev->dev, NULL); |
36e02b62 RW |
121 | if (power_state < 0) |
122 | power_state = (state.event == PM_EVENT_ON) ? | |
123 | ACPI_STATE_D0 : ACPI_STATE_D3; | |
124 | ||
125 | return acpi_bus_set_power((acpi_handle) dev->data, power_state); | |
fc30e68e SL |
126 | } |
127 | ||
128 | static int pnpacpi_resume(struct pnp_dev *dev) | |
129 | { | |
9dd78466 | 130 | return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0); |
fc30e68e | 131 | } |
673d5b43 | 132 | #endif |
fc30e68e | 133 | |
b449f63c | 134 | static struct pnp_protocol pnpacpi_protocol = { |
07d4e9af BH |
135 | .name = "Plug and Play ACPI", |
136 | .get = pnpacpi_get_resources, | |
137 | .set = pnpacpi_set_resources, | |
1da177e4 | 138 | .disable = pnpacpi_disable_resources, |
673d5b43 | 139 | #ifdef CONFIG_ACPI_SLEEP |
fc30e68e SL |
140 | .suspend = pnpacpi_suspend, |
141 | .resume = pnpacpi_resume, | |
673d5b43 | 142 | #endif |
1da177e4 LT |
143 | }; |
144 | ||
145 | static int __init pnpacpi_add_device(struct acpi_device *device) | |
146 | { | |
147 | acpi_handle temp = NULL; | |
148 | acpi_status status; | |
1da177e4 LT |
149 | struct pnp_dev *dev; |
150 | ||
07b0120d | 151 | status = acpi_get_handle(device->handle, "_CRS", &temp); |
152 | if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) || | |
9dd78466 | 153 | is_exclusive_device(device)) |
1da177e4 LT |
154 | return 0; |
155 | ||
bda1e4e5 BH |
156 | dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device)); |
157 | if (!dev) | |
1da177e4 | 158 | return -ENOMEM; |
bda1e4e5 | 159 | |
1da177e4 | 160 | dev->data = device->handle; |
07d4e9af | 161 | /* .enabled means the device can decode the resources */ |
1da177e4 LT |
162 | dev->active = device->status.enabled; |
163 | status = acpi_get_handle(device->handle, "_SRS", &temp); | |
164 | if (ACPI_SUCCESS(status)) | |
165 | dev->capabilities |= PNP_CONFIGURABLE; | |
166 | dev->capabilities |= PNP_READ; | |
856608ee | 167 | if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) |
1da177e4 LT |
168 | dev->capabilities |= PNP_WRITE; |
169 | if (device->flags.removable) | |
170 | dev->capabilities |= PNP_REMOVABLE; | |
171 | status = acpi_get_handle(device->handle, "_DIS", &temp); | |
172 | if (ACPI_SUCCESS(status)) | |
173 | dev->capabilities |= PNP_DISABLE; | |
174 | ||
1da177e4 LT |
175 | if (strlen(acpi_device_name(device))) |
176 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); | |
177 | else | |
178 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); | |
179 | ||
d152cf5d BH |
180 | if (dev->active) |
181 | pnpacpi_parse_allocated_resource(dev); | |
1da177e4 | 182 | |
d152cf5d BH |
183 | if (dev->capabilities & PNP_CONFIGURABLE) |
184 | pnpacpi_parse_resource_option_data(dev); | |
55955aad | 185 | |
1da177e4 LT |
186 | if (device->flags.compatible_ids) { |
187 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; | |
188 | int i; | |
189 | ||
190 | for (i = 0; i < cid_list->count; i++) { | |
191 | if (!ispnpidacpi(cid_list->id[i].value)) | |
192 | continue; | |
772defc6 | 193 | pnp_add_id(dev, cid_list->id[i].value); |
1da177e4 LT |
194 | } |
195 | } | |
196 | ||
197 | /* clear out the damaged flags */ | |
198 | if (!dev->active) | |
f4490002 | 199 | pnp_init_resources(dev); |
1da177e4 | 200 | pnp_add_device(dev); |
9dd78466 | 201 | num++; |
1da177e4 LT |
202 | |
203 | return AE_OK; | |
1da177e4 LT |
204 | } |
205 | ||
206 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, | |
9dd78466 BH |
207 | u32 lvl, void *context, |
208 | void **rv) | |
1da177e4 LT |
209 | { |
210 | struct acpi_device *device; | |
211 | ||
212 | if (!acpi_bus_get_device(handle, &device)) | |
213 | pnpacpi_add_device(device); | |
214 | else | |
215 | return AE_CTRL_DEPTH; | |
216 | return AE_OK; | |
217 | } | |
218 | ||
55955aad DB |
219 | static int __init acpi_pnp_match(struct device *dev, void *_pnp) |
220 | { | |
9dd78466 BH |
221 | struct acpi_device *acpi = to_acpi_device(dev); |
222 | struct pnp_dev *pnp = _pnp; | |
55955aad DB |
223 | |
224 | /* true means it matched */ | |
225 | return acpi->flags.hardware_id | |
9dd78466 BH |
226 | && !acpi_get_physical_device(acpi->handle) |
227 | && compare_pnp_id(pnp->id, acpi->pnp.hardware_id); | |
55955aad DB |
228 | } |
229 | ||
9dd78466 | 230 | static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) |
55955aad | 231 | { |
9dd78466 BH |
232 | struct device *adev; |
233 | struct acpi_device *acpi; | |
55955aad DB |
234 | |
235 | adev = bus_find_device(&acpi_bus_type, NULL, | |
9dd78466 | 236 | to_pnp_dev(dev), acpi_pnp_match); |
55955aad DB |
237 | if (!adev) |
238 | return -ENODEV; | |
239 | ||
240 | acpi = to_acpi_device(adev); | |
241 | *handle = acpi->handle; | |
242 | put_device(adev); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* complete initialization of a PNPACPI device includes having | |
247 | * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. | |
248 | */ | |
249 | static struct acpi_bus_type __initdata acpi_pnp_bus = { | |
07d4e9af | 250 | .bus = &pnp_bus_type, |
55955aad DB |
251 | .find_device = acpi_pnp_find_device, |
252 | }; | |
253 | ||
1da177e4 | 254 | int pnpacpi_disabled __initdata; |
b449f63c | 255 | static int __init pnpacpi_init(void) |
1da177e4 LT |
256 | { |
257 | if (acpi_disabled || pnpacpi_disabled) { | |
258 | pnp_info("PnP ACPI: disabled"); | |
259 | return 0; | |
260 | } | |
261 | pnp_info("PnP ACPI init"); | |
262 | pnp_register_protocol(&pnpacpi_protocol); | |
55955aad | 263 | register_acpi_bus_type(&acpi_pnp_bus); |
1da177e4 LT |
264 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
265 | pnp_info("PnP ACPI: found %d devices", num); | |
55955aad | 266 | unregister_acpi_bus_type(&acpi_pnp_bus); |
8f81dd14 | 267 | pnp_platform_devices = 1; |
1da177e4 LT |
268 | return 0; |
269 | } | |
9dd78466 | 270 | |
1da177e4 LT |
271 | subsys_initcall(pnpacpi_init); |
272 | ||
273 | static int __init pnpacpi_setup(char *str) | |
274 | { | |
275 | if (str == NULL) | |
276 | return 1; | |
277 | if (!strncmp(str, "off", 3)) | |
278 | pnpacpi_disabled = 1; | |
279 | return 1; | |
280 | } | |
9dd78466 | 281 | |
1da177e4 | 282 | __setup("pnpacpi=", pnpacpi_setup); |