PNPBIOS: remove include/linux/pnpbios.h
[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         dev_dbg(&dev->dev, "get resources\n");
79         return pnpacpi_parse_allocated_resource(dev);
80 }
81
82 static int pnpacpi_set_resources(struct pnp_dev *dev)
83 {
84         acpi_handle handle = dev->data;
85         struct acpi_buffer buffer;
86         int ret;
87         acpi_status status;
88
89         dev_dbg(&dev->dev, "set resources\n");
90         ret = pnpacpi_build_resource_template(dev, &buffer);
91         if (ret)
92                 return ret;
93         ret = pnpacpi_encode_resources(dev, &buffer);
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;
108
109         /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
110         status = acpi_evaluate_object((acpi_handle) dev->data,
111                                       "_DIS", NULL, NULL);
112         return ACPI_FAILURE(status) ? -ENODEV : 0;
113 }
114
115 #ifdef CONFIG_ACPI_SLEEP
116 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
117 {
118         int power_state;
119
120         power_state = acpi_pm_device_sleep_state(&dev->dev,
121                                                 device_may_wakeup(&dev->dev),
122                                                 NULL);
123         if (power_state < 0)
124                 power_state = (state.event == PM_EVENT_ON) ?
125                                 ACPI_STATE_D0 : ACPI_STATE_D3;
126
127         return acpi_bus_set_power((acpi_handle) dev->data, power_state);
128 }
129
130 static int pnpacpi_resume(struct pnp_dev *dev)
131 {
132         return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
133 }
134 #endif
135
136 static struct pnp_protocol pnpacpi_protocol = {
137         .name    = "Plug and Play ACPI",
138         .get     = pnpacpi_get_resources,
139         .set     = pnpacpi_set_resources,
140         .disable = pnpacpi_disable_resources,
141 #ifdef CONFIG_ACPI_SLEEP
142         .suspend = pnpacpi_suspend,
143         .resume = pnpacpi_resume,
144 #endif
145 };
146
147 static int __init pnpacpi_add_device(struct acpi_device *device)
148 {
149         acpi_handle temp = NULL;
150         acpi_status status;
151         struct pnp_dev *dev;
152
153         status = acpi_get_handle(device->handle, "_CRS", &temp);
154         if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
155             is_exclusive_device(device))
156                 return 0;
157
158         dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
159         if (!dev)
160                 return -ENOMEM;
161
162         dev->data = device->handle;
163         /* .enabled means the device can decode the resources */
164         dev->active = device->status.enabled;
165         status = acpi_get_handle(device->handle, "_SRS", &temp);
166         if (ACPI_SUCCESS(status))
167                 dev->capabilities |= PNP_CONFIGURABLE;
168         dev->capabilities |= PNP_READ;
169         if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
170                 dev->capabilities |= PNP_WRITE;
171         if (device->flags.removable)
172                 dev->capabilities |= PNP_REMOVABLE;
173         status = acpi_get_handle(device->handle, "_DIS", &temp);
174         if (ACPI_SUCCESS(status))
175                 dev->capabilities |= PNP_DISABLE;
176
177         if (strlen(acpi_device_name(device)))
178                 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
179         else
180                 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
181
182         if (dev->active)
183                 pnpacpi_parse_allocated_resource(dev);
184
185         if (dev->capabilities & PNP_CONFIGURABLE)
186                 pnpacpi_parse_resource_option_data(dev);
187
188         if (device->flags.compatible_ids) {
189                 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
190                 int i;
191
192                 for (i = 0; i < cid_list->count; i++) {
193                         if (!ispnpidacpi(cid_list->id[i].value))
194                                 continue;
195                         pnp_add_id(dev, cid_list->id[i].value);
196                 }
197         }
198
199         /* clear out the damaged flags */
200         if (!dev->active)
201                 pnp_init_resources(dev);
202         pnp_add_device(dev);
203         num++;
204
205         return AE_OK;
206 }
207
208 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
209                                                      u32 lvl, void *context,
210                                                      void **rv)
211 {
212         struct acpi_device *device;
213
214         if (!acpi_bus_get_device(handle, &device))
215                 pnpacpi_add_device(device);
216         else
217                 return AE_CTRL_DEPTH;
218         return AE_OK;
219 }
220
221 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
222 {
223         struct acpi_device *acpi = to_acpi_device(dev);
224         struct pnp_dev *pnp = _pnp;
225
226         /* true means it matched */
227         return acpi->flags.hardware_id
228             && !acpi_get_physical_device(acpi->handle)
229             && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
230 }
231
232 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
233 {
234         struct device *adev;
235         struct acpi_device *acpi;
236
237         adev = bus_find_device(&acpi_bus_type, NULL,
238                                to_pnp_dev(dev), acpi_pnp_match);
239         if (!adev)
240                 return -ENODEV;
241
242         acpi = to_acpi_device(adev);
243         *handle = acpi->handle;
244         put_device(adev);
245         return 0;
246 }
247
248 /* complete initialization of a PNPACPI device includes having
249  * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
250  */
251 static struct acpi_bus_type __initdata acpi_pnp_bus = {
252         .bus         = &pnp_bus_type,
253         .find_device = acpi_pnp_find_device,
254 };
255
256 int pnpacpi_disabled __initdata;
257 static int __init pnpacpi_init(void)
258 {
259         if (acpi_disabled || pnpacpi_disabled) {
260                 pnp_info("PnP ACPI: disabled");
261                 return 0;
262         }
263         pnp_info("PnP ACPI init");
264         pnp_register_protocol(&pnpacpi_protocol);
265         register_acpi_bus_type(&acpi_pnp_bus);
266         acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
267         pnp_info("PnP ACPI: found %d devices", num);
268         unregister_acpi_bus_type(&acpi_pnp_bus);
269         pnp_platform_devices = 1;
270         return 0;
271 }
272
273 subsys_initcall(pnpacpi_init);
274
275 static int __init pnpacpi_setup(char *str)
276 {
277         if (str == NULL)
278                 return 1;
279         if (!strncmp(str, "off", 3))
280                 pnpacpi_disabled = 1;
281         return 1;
282 }
283
284 __setup("pnpacpi=", pnpacpi_setup);