PNP: Lindent all source files
[linux-2.6.git] / drivers / pnp / pnpacpi / core.c
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>
6  *
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  */
21
22 #include <linux/acpi.h>
23 #include <linux/pnp.h>
24 #include <linux/mod_devicetable.h>
25 #include <acpi/acpi_bus.h>
26 #include <acpi/actypes.h>
27
28 #include "pnpacpi.h"
29
30 static int num = 0;
31
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.
37  * Finaly only devices that have a CRS method need to be in this list.
38  */
39 static __initdata struct acpi_device_id excluded_id_list[] = {
40         {"PNP0C09", 0},         /* EC */
41         {"PNP0C0F", 0},         /* Link device */
42         {"PNP0000", 0},         /* PIC */
43         {"PNP0100", 0},         /* Timer */
44         {"", 0},
45 };
46
47 static inline int is_exclusive_device(struct acpi_device *dev)
48 {
49         return (!acpi_match_device_ids(dev, excluded_id_list));
50 }
51
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
75 static void __init pnpidacpi_to_pnpid(char *id, char *str)
76 {
77         str[0] = id[0];
78         str[1] = id[1];
79         str[2] = id[2];
80         str[3] = tolower(id[3]);
81         str[4] = tolower(id[4]);
82         str[5] = tolower(id[5]);
83         str[6] = tolower(id[6]);
84         str[7] = '\0';
85 }
86
87 static int pnpacpi_get_resources(struct pnp_dev *dev,
88                                  struct pnp_resource_table *res)
89 {
90         acpi_status status;
91         status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
92                                                   &dev->res);
93         return ACPI_FAILURE(status) ? -ENODEV : 0;
94 }
95
96 static int pnpacpi_set_resources(struct pnp_dev *dev,
97                                  struct pnp_resource_table *res)
98 {
99         acpi_handle handle = dev->data;
100         struct acpi_buffer buffer;
101         int ret = 0;
102         acpi_status status;
103
104         ret = pnpacpi_build_resource_template(handle, &buffer);
105         if (ret)
106                 return ret;
107         ret = pnpacpi_encode_resources(res, &buffer);
108         if (ret) {
109                 kfree(buffer.pointer);
110                 return ret;
111         }
112         status = acpi_set_current_resources(handle, &buffer);
113         if (ACPI_FAILURE(status))
114                 ret = -EINVAL;
115         kfree(buffer.pointer);
116         return ret;
117 }
118
119 static int pnpacpi_disable_resources(struct pnp_dev *dev)
120 {
121         acpi_status status;
122
123         /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
124         status = acpi_evaluate_object((acpi_handle) dev->data,
125                                       "_DIS", NULL, NULL);
126         return ACPI_FAILURE(status) ? -ENODEV : 0;
127 }
128
129 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
130 {
131         return acpi_bus_set_power((acpi_handle) dev->data,
132                                   acpi_pm_device_sleep_state(&dev->dev,
133                                                              device_may_wakeup
134                                                              (&dev->dev),
135                                                              NULL));
136 }
137
138 static int pnpacpi_resume(struct pnp_dev *dev)
139 {
140         return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
141 }
142
143 static struct pnp_protocol pnpacpi_protocol = {
144         .name = "Plug and Play ACPI",
145         .get = pnpacpi_get_resources,
146         .set = pnpacpi_set_resources,
147         .disable = pnpacpi_disable_resources,
148         .suspend = pnpacpi_suspend,
149         .resume = pnpacpi_resume,
150 };
151
152 static int __init pnpacpi_add_device(struct acpi_device *device)
153 {
154         acpi_handle temp = NULL;
155         acpi_status status;
156         struct pnp_id *dev_id;
157         struct pnp_dev *dev;
158
159         status = acpi_get_handle(device->handle, "_CRS", &temp);
160         if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
161             is_exclusive_device(device))
162                 return 0;
163
164         pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
165         dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
166         if (!dev) {
167                 pnp_err("Out of memory");
168                 return -ENOMEM;
169         }
170         dev->data = device->handle;
171         /* .enabled means if the device can decode the resources */
172         dev->active = device->status.enabled;
173         status = acpi_get_handle(device->handle, "_SRS", &temp);
174         if (ACPI_SUCCESS(status))
175                 dev->capabilities |= PNP_CONFIGURABLE;
176         dev->capabilities |= PNP_READ;
177         if (device->flags.dynamic_status)
178                 dev->capabilities |= PNP_WRITE;
179         if (device->flags.removable)
180                 dev->capabilities |= PNP_REMOVABLE;
181         status = acpi_get_handle(device->handle, "_DIS", &temp);
182         if (ACPI_SUCCESS(status))
183                 dev->capabilities |= PNP_DISABLE;
184
185         dev->protocol = &pnpacpi_protocol;
186
187         if (strlen(acpi_device_name(device)))
188                 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
189         else
190                 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
191
192         dev->number = num;
193
194         /* set the initial values for the PnP device */
195         dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
196         if (!dev_id)
197                 goto err;
198         pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
199         pnp_add_id(dev_id, dev);
200
201         if (dev->active) {
202                 /* parse allocated resource */
203                 status =
204                     pnpacpi_parse_allocated_resource(device->handle, &dev->res);
205                 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
206                         pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
207                                 dev_id->id);
208                         goto err1;
209                 }
210         }
211
212         if (dev->capabilities & PNP_CONFIGURABLE) {
213                 status = pnpacpi_parse_resource_option_data(device->handle,
214                                                             dev);
215                 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
216                         pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
217                                 dev_id->id);
218                         goto err1;
219                 }
220         }
221
222         /* parse compatible ids */
223         if (device->flags.compatible_ids) {
224                 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
225                 int i;
226
227                 for (i = 0; i < cid_list->count; i++) {
228                         if (!ispnpidacpi(cid_list->id[i].value))
229                                 continue;
230                         dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
231                         if (!dev_id)
232                                 continue;
233
234                         pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
235                         pnp_add_id(dev_id, dev);
236                 }
237         }
238
239         /* clear out the damaged flags */
240         if (!dev->active)
241                 pnp_init_resource_table(&dev->res);
242         pnp_add_device(dev);
243         num++;
244
245         return AE_OK;
246       err1:
247         kfree(dev_id);
248       err:
249         kfree(dev);
250         return -EINVAL;
251 }
252
253 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
254                                                      u32 lvl, void *context,
255                                                      void **rv)
256 {
257         struct acpi_device *device;
258
259         if (!acpi_bus_get_device(handle, &device))
260                 pnpacpi_add_device(device);
261         else
262                 return AE_CTRL_DEPTH;
263         return AE_OK;
264 }
265
266 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
267 {
268         struct acpi_device *acpi = to_acpi_device(dev);
269         struct pnp_dev *pnp = _pnp;
270
271         /* true means it matched */
272         return acpi->flags.hardware_id
273             && !acpi_get_physical_device(acpi->handle)
274             && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
275 }
276
277 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
278 {
279         struct device *adev;
280         struct acpi_device *acpi;
281
282         adev = bus_find_device(&acpi_bus_type, NULL,
283                                to_pnp_dev(dev), acpi_pnp_match);
284         if (!adev)
285                 return -ENODEV;
286
287         acpi = to_acpi_device(adev);
288         *handle = acpi->handle;
289         put_device(adev);
290         return 0;
291 }
292
293 /* complete initialization of a PNPACPI device includes having
294  * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
295  */
296 static struct acpi_bus_type __initdata acpi_pnp_bus = {
297         .bus = &pnp_bus_type,
298         .find_device = acpi_pnp_find_device,
299 };
300
301 int pnpacpi_disabled __initdata;
302 static int __init pnpacpi_init(void)
303 {
304         if (acpi_disabled || pnpacpi_disabled) {
305                 pnp_info("PnP ACPI: disabled");
306                 return 0;
307         }
308         pnp_info("PnP ACPI init");
309         pnp_register_protocol(&pnpacpi_protocol);
310         register_acpi_bus_type(&acpi_pnp_bus);
311         acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
312         pnp_info("PnP ACPI: found %d devices", num);
313         unregister_acpi_bus_type(&acpi_pnp_bus);
314         pnp_platform_devices = 1;
315         return 0;
316 }
317
318 subsys_initcall(pnpacpi_init);
319
320 static int __init pnpacpi_setup(char *str)
321 {
322         if (str == NULL)
323                 return 1;
324         if (!strncmp(str, "off", 3))
325                 pnpacpi_disabled = 1;
326         return 1;
327 }
328
329 __setup("pnpacpi=", pnpacpi_setup);
330
331 #if 0
332 EXPORT_SYMBOL(pnpacpi_protocol);
333 #endif