2 * pnpacpi -- PnP ACPI driver
4 * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
5 * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
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
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.
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
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>
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 * Finally, only devices that have a CRS method need to be in this list.
39 static struct __initdata acpi_device_id excluded_id_list[] = {
40 {"PNP0C09", 0}, /* EC */
41 {"PNP0C0F", 0}, /* Link device */
42 {"PNP0000", 0}, /* PIC */
43 {"PNP0100", 0}, /* Timer */
47 static inline int is_exclusive_device(struct acpi_device *dev)
49 return (!acpi_match_device_ids(dev, excluded_id_list));
53 * Compatible Device IDs
56 if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
58 #define TEST_ALPHA(c) \
59 if (!('@' <= (c) || (c) <= 'Z')) \
61 static int __init ispnpidacpi(char *id)
75 static void __init pnpidacpi_to_pnpid(char *id, char *str)
80 str[3] = tolower(id[3]);
81 str[4] = tolower(id[4]);
82 str[5] = tolower(id[5]);
83 str[6] = tolower(id[6]);
87 static int pnpacpi_get_resources(struct pnp_dev *dev,
88 struct pnp_resource_table *res)
92 status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
94 return ACPI_FAILURE(status) ? -ENODEV : 0;
97 static int pnpacpi_set_resources(struct pnp_dev *dev,
98 struct pnp_resource_table *res)
100 acpi_handle handle = dev->data;
101 struct acpi_buffer buffer;
105 ret = pnpacpi_build_resource_template(handle, &buffer);
108 ret = pnpacpi_encode_resources(res, &buffer);
110 kfree(buffer.pointer);
113 status = acpi_set_current_resources(handle, &buffer);
114 if (ACPI_FAILURE(status))
116 kfree(buffer.pointer);
120 static int pnpacpi_disable_resources(struct pnp_dev *dev)
124 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
125 status = acpi_evaluate_object((acpi_handle) dev->data,
127 return ACPI_FAILURE(status) ? -ENODEV : 0;
130 #ifdef CONFIG_ACPI_SLEEP
131 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
135 power_state = acpi_pm_device_sleep_state(&dev->dev,
136 device_may_wakeup(&dev->dev),
139 power_state = (state.event == PM_EVENT_ON) ?
140 ACPI_STATE_D0 : ACPI_STATE_D3;
142 return acpi_bus_set_power((acpi_handle) dev->data, power_state);
145 static int pnpacpi_resume(struct pnp_dev *dev)
147 return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
151 static struct pnp_protocol pnpacpi_protocol = {
152 .name = "Plug and Play ACPI",
153 .get = pnpacpi_get_resources,
154 .set = pnpacpi_set_resources,
155 .disable = pnpacpi_disable_resources,
156 #ifdef CONFIG_ACPI_SLEEP
157 .suspend = pnpacpi_suspend,
158 .resume = pnpacpi_resume,
162 static int __init pnpacpi_add_device(struct acpi_device *device)
164 acpi_handle temp = NULL;
166 struct pnp_id *dev_id;
169 status = acpi_get_handle(device->handle, "_CRS", &temp);
170 if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
171 is_exclusive_device(device))
174 pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
175 dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
177 pnp_err("Out of memory");
180 dev->data = device->handle;
181 /* .enabled means the device can decode the resources */
182 dev->active = device->status.enabled;
183 status = acpi_get_handle(device->handle, "_SRS", &temp);
184 if (ACPI_SUCCESS(status))
185 dev->capabilities |= PNP_CONFIGURABLE;
186 dev->capabilities |= PNP_READ;
187 if (device->flags.dynamic_status)
188 dev->capabilities |= PNP_WRITE;
189 if (device->flags.removable)
190 dev->capabilities |= PNP_REMOVABLE;
191 status = acpi_get_handle(device->handle, "_DIS", &temp);
192 if (ACPI_SUCCESS(status))
193 dev->capabilities |= PNP_DISABLE;
195 dev->protocol = &pnpacpi_protocol;
197 if (strlen(acpi_device_name(device)))
198 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
200 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
204 /* set the initial values for the PnP device */
205 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
208 pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
209 pnp_add_id(dev_id, dev);
212 /* parse allocated resource */
213 status = pnpacpi_parse_allocated_resource(device->handle,
215 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
216 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
222 if (dev->capabilities & PNP_CONFIGURABLE) {
223 status = pnpacpi_parse_resource_option_data(device->handle,
225 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
226 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
232 /* parse compatible ids */
233 if (device->flags.compatible_ids) {
234 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
237 for (i = 0; i < cid_list->count; i++) {
238 if (!ispnpidacpi(cid_list->id[i].value))
240 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
244 pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
245 pnp_add_id(dev_id, dev);
249 /* clear out the damaged flags */
251 pnp_init_resource_table(&dev->res);
263 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
264 u32 lvl, void *context,
267 struct acpi_device *device;
269 if (!acpi_bus_get_device(handle, &device))
270 pnpacpi_add_device(device);
272 return AE_CTRL_DEPTH;
276 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
278 struct acpi_device *acpi = to_acpi_device(dev);
279 struct pnp_dev *pnp = _pnp;
281 /* true means it matched */
282 return acpi->flags.hardware_id
283 && !acpi_get_physical_device(acpi->handle)
284 && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
287 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
290 struct acpi_device *acpi;
292 adev = bus_find_device(&acpi_bus_type, NULL,
293 to_pnp_dev(dev), acpi_pnp_match);
297 acpi = to_acpi_device(adev);
298 *handle = acpi->handle;
303 /* complete initialization of a PNPACPI device includes having
304 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
306 static struct acpi_bus_type __initdata acpi_pnp_bus = {
307 .bus = &pnp_bus_type,
308 .find_device = acpi_pnp_find_device,
311 int pnpacpi_disabled __initdata;
312 static int __init pnpacpi_init(void)
314 if (acpi_disabled || pnpacpi_disabled) {
315 pnp_info("PnP ACPI: disabled");
318 pnp_info("PnP ACPI init");
319 pnp_register_protocol(&pnpacpi_protocol);
320 register_acpi_bus_type(&acpi_pnp_bus);
321 acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
322 pnp_info("PnP ACPI: found %d devices", num);
323 unregister_acpi_bus_type(&acpi_pnp_bus);
324 pnp_platform_devices = 1;
328 subsys_initcall(pnpacpi_init);
330 static int __init pnpacpi_setup(char *str)
334 if (!strncmp(str, "off", 3))
335 pnpacpi_disabled = 1;
339 __setup("pnpacpi=", pnpacpi_setup);