PNP: remove pnp_resource_table from internal get/set interfaces
[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 "../base.h"
29 #include "pnpacpi.h"
30
31 static int num = 0;
32
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.
38  * Finally, only devices that have a CRS method need to be in this list.
39  */
40 static struct acpi_device_id excluded_id_list[] __initdata = {
41         {"PNP0C09", 0},         /* EC */
42         {"PNP0C0F", 0},         /* Link device */
43         {"PNP0000", 0},         /* PIC */
44         {"PNP0100", 0},         /* Timer */
45         {"", 0},
46 };
47
48 static inline int is_exclusive_device(struct acpi_device *dev)
49 {
50         return (!acpi_match_device_ids(dev, excluded_id_list));
51 }
52
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
76 static int pnpacpi_get_resources(struct pnp_dev *dev)
77 {
78         acpi_status status;
79
80         status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
81                                                   &dev->res);
82         return ACPI_FAILURE(status) ? -ENODEV : 0;
83 }
84
85 static int pnpacpi_set_resources(struct pnp_dev *dev)
86 {
87         acpi_handle handle = dev->data;
88         struct acpi_buffer buffer;
89         int ret;
90         acpi_status status;
91
92         ret = pnpacpi_build_resource_template(dev, &buffer);
93         if (ret)
94                 return ret;
95         ret = pnpacpi_encode_resources(&dev->res, &buffer);
96         if (ret) {
97                 kfree(buffer.pointer);
98                 return ret;
99         }
100         status = acpi_set_current_resources(handle, &buffer);
101         if (ACPI_FAILURE(status))
102                 ret = -EINVAL;
103         kfree(buffer.pointer);
104         return ret;
105 }
106
107 static int pnpacpi_disable_resources(struct pnp_dev *dev)
108 {
109         acpi_status status;
110
111         /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
112         status = acpi_evaluate_object((acpi_handle) dev->data,
113                                       "_DIS", NULL, NULL);
114         return ACPI_FAILURE(status) ? -ENODEV : 0;
115 }
116
117 #ifdef CONFIG_ACPI_SLEEP
118 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
119 {
120         int power_state;
121
122         power_state = acpi_pm_device_sleep_state(&dev->dev,
123                                                 device_may_wakeup(&dev->dev),
124                                                 NULL);
125         if (power_state < 0)
126                 power_state = (state.event == PM_EVENT_ON) ?
127                                 ACPI_STATE_D0 : ACPI_STATE_D3;
128
129         return acpi_bus_set_power((acpi_handle) dev->data, power_state);
130 }
131
132 static int pnpacpi_resume(struct pnp_dev *dev)
133 {
134         return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
135 }
136 #endif
137
138 static struct pnp_protocol pnpacpi_protocol = {
139         .name    = "Plug and Play ACPI",
140         .get     = pnpacpi_get_resources,
141         .set     = pnpacpi_set_resources,
142         .disable = pnpacpi_disable_resources,
143 #ifdef CONFIG_ACPI_SLEEP
144         .suspend = pnpacpi_suspend,
145         .resume = pnpacpi_resume,
146 #endif
147 };
148
149 static int __init pnpacpi_add_device(struct acpi_device *device)
150 {
151         acpi_handle temp = NULL;
152         acpi_status status;
153         struct pnp_dev *dev;
154
155         status = acpi_get_handle(device->handle, "_CRS", &temp);
156         if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
157             is_exclusive_device(device))
158                 return 0;
159
160         dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
161         if (!dev)
162                 return -ENOMEM;
163
164         dev->data = device->handle;
165         /* .enabled means the device can decode the resources */
166         dev->active = device->status.enabled;
167         status = acpi_get_handle(device->handle, "_SRS", &temp);
168         if (ACPI_SUCCESS(status))
169                 dev->capabilities |= PNP_CONFIGURABLE;
170         dev->capabilities |= PNP_READ;
171         if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
172                 dev->capabilities |= PNP_WRITE;
173         if (device->flags.removable)
174                 dev->capabilities |= PNP_REMOVABLE;
175         status = acpi_get_handle(device->handle, "_DIS", &temp);
176         if (ACPI_SUCCESS(status))
177                 dev->capabilities |= PNP_DISABLE;
178
179         if (strlen(acpi_device_name(device)))
180                 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
181         else
182                 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
183
184         if (dev->active) {
185                 /* parse allocated resource */
186                 status = pnpacpi_parse_allocated_resource(device->handle,
187                                                           &dev->res);
188                 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
189                         pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
190                                 acpi_device_hid(device));
191                 }
192         }
193
194         if (dev->capabilities & PNP_CONFIGURABLE) {
195                 status = pnpacpi_parse_resource_option_data(device->handle,
196                                                             dev);
197                 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
198                         pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
199                                 acpi_device_hid(device));
200                 }
201         }
202
203         if (device->flags.compatible_ids) {
204                 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
205                 int i;
206
207                 for (i = 0; i < cid_list->count; i++) {
208                         if (!ispnpidacpi(cid_list->id[i].value))
209                                 continue;
210                         pnp_add_id(dev, cid_list->id[i].value);
211                 }
212         }
213
214         /* clear out the damaged flags */
215         if (!dev->active)
216                 pnp_init_resource_table(&dev->res);
217         pnp_add_device(dev);
218         num++;
219
220         return AE_OK;
221 }
222
223 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
224                                                      u32 lvl, void *context,
225                                                      void **rv)
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
236 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
237 {
238         struct acpi_device *acpi = to_acpi_device(dev);
239         struct pnp_dev *pnp = _pnp;
240
241         /* true means it matched */
242         return acpi->flags.hardware_id
243             && !acpi_get_physical_device(acpi->handle)
244             && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
245 }
246
247 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
248 {
249         struct device *adev;
250         struct acpi_device *acpi;
251
252         adev = bus_find_device(&acpi_bus_type, NULL,
253                                to_pnp_dev(dev), acpi_pnp_match);
254         if (!adev)
255                 return -ENODEV;
256
257         acpi = to_acpi_device(adev);
258         *handle = acpi->handle;
259         put_device(adev);
260         return 0;
261 }
262
263 /* complete initialization of a PNPACPI device includes having
264  * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
265  */
266 static struct acpi_bus_type __initdata acpi_pnp_bus = {
267         .bus         = &pnp_bus_type,
268         .find_device = acpi_pnp_find_device,
269 };
270
271 int pnpacpi_disabled __initdata;
272 static int __init pnpacpi_init(void)
273 {
274         if (acpi_disabled || pnpacpi_disabled) {
275                 pnp_info("PnP ACPI: disabled");
276                 return 0;
277         }
278         pnp_info("PnP ACPI init");
279         pnp_register_protocol(&pnpacpi_protocol);
280         register_acpi_bus_type(&acpi_pnp_bus);
281         acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
282         pnp_info("PnP ACPI: found %d devices", num);
283         unregister_acpi_bus_type(&acpi_pnp_bus);
284         pnp_platform_devices = 1;
285         return 0;
286 }
287
288 subsys_initcall(pnpacpi_init);
289
290 static int __init pnpacpi_setup(char *str)
291 {
292         if (str == NULL)
293                 return 1;
294         if (!strncmp(str, "off", 3))
295                 pnpacpi_disabled = 1;
296         return 1;
297 }
298
299 __setup("pnpacpi=", pnpacpi_setup);