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>
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.
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 */
48 static inline int is_exclusive_device(struct acpi_device *dev)
50 return (!acpi_match_device_ids(dev, excluded_id_list));
54 * Compatible Device IDs
57 if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
59 #define TEST_ALPHA(c) \
60 if (!('@' <= (c) || (c) <= 'Z')) \
62 static int __init ispnpidacpi(char *id)
76 static int pnpacpi_get_resources(struct pnp_dev *dev,
77 struct pnp_resource_table *res)
81 status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
83 return ACPI_FAILURE(status) ? -ENODEV : 0;
86 static int pnpacpi_set_resources(struct pnp_dev *dev,
87 struct pnp_resource_table *res)
89 acpi_handle handle = dev->data;
90 struct acpi_buffer buffer;
94 ret = pnpacpi_build_resource_template(handle, &buffer);
97 ret = pnpacpi_encode_resources(res, &buffer);
99 kfree(buffer.pointer);
102 status = acpi_set_current_resources(handle, &buffer);
103 if (ACPI_FAILURE(status))
105 kfree(buffer.pointer);
109 static int pnpacpi_disable_resources(struct pnp_dev *dev)
113 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
114 status = acpi_evaluate_object((acpi_handle) dev->data,
116 return ACPI_FAILURE(status) ? -ENODEV : 0;
119 #ifdef CONFIG_ACPI_SLEEP
120 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
124 power_state = acpi_pm_device_sleep_state(&dev->dev,
125 device_may_wakeup(&dev->dev),
128 power_state = (state.event == PM_EVENT_ON) ?
129 ACPI_STATE_D0 : ACPI_STATE_D3;
131 return acpi_bus_set_power((acpi_handle) dev->data, power_state);
134 static int pnpacpi_resume(struct pnp_dev *dev)
136 return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
140 static struct pnp_protocol pnpacpi_protocol = {
141 .name = "Plug and Play ACPI",
142 .get = pnpacpi_get_resources,
143 .set = pnpacpi_set_resources,
144 .disable = pnpacpi_disable_resources,
145 #ifdef CONFIG_ACPI_SLEEP
146 .suspend = pnpacpi_suspend,
147 .resume = pnpacpi_resume,
151 static int __init pnpacpi_add_device(struct acpi_device *device)
153 acpi_handle temp = NULL;
157 status = acpi_get_handle(device->handle, "_CRS", &temp);
158 if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
159 is_exclusive_device(device))
162 dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
166 dev->data = device->handle;
167 /* .enabled means the device can decode the resources */
168 dev->active = device->status.enabled;
169 status = acpi_get_handle(device->handle, "_SRS", &temp);
170 if (ACPI_SUCCESS(status))
171 dev->capabilities |= PNP_CONFIGURABLE;
172 dev->capabilities |= PNP_READ;
173 if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
174 dev->capabilities |= PNP_WRITE;
175 if (device->flags.removable)
176 dev->capabilities |= PNP_REMOVABLE;
177 status = acpi_get_handle(device->handle, "_DIS", &temp);
178 if (ACPI_SUCCESS(status))
179 dev->capabilities |= PNP_DISABLE;
181 if (strlen(acpi_device_name(device)))
182 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
184 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
187 /* parse allocated resource */
188 status = pnpacpi_parse_allocated_resource(device->handle,
190 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
191 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
192 acpi_device_hid(device));
196 if (dev->capabilities & PNP_CONFIGURABLE) {
197 status = pnpacpi_parse_resource_option_data(device->handle,
199 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
200 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
201 acpi_device_hid(device));
205 if (device->flags.compatible_ids) {
206 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
209 for (i = 0; i < cid_list->count; i++) {
210 if (!ispnpidacpi(cid_list->id[i].value))
212 pnp_add_id(dev, cid_list->id[i].value);
216 /* clear out the damaged flags */
218 pnp_init_resource_table(&dev->res);
225 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
226 u32 lvl, void *context,
229 struct acpi_device *device;
231 if (!acpi_bus_get_device(handle, &device))
232 pnpacpi_add_device(device);
234 return AE_CTRL_DEPTH;
238 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
240 struct acpi_device *acpi = to_acpi_device(dev);
241 struct pnp_dev *pnp = _pnp;
243 /* true means it matched */
244 return acpi->flags.hardware_id
245 && !acpi_get_physical_device(acpi->handle)
246 && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
249 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
252 struct acpi_device *acpi;
254 adev = bus_find_device(&acpi_bus_type, NULL,
255 to_pnp_dev(dev), acpi_pnp_match);
259 acpi = to_acpi_device(adev);
260 *handle = acpi->handle;
265 /* complete initialization of a PNPACPI device includes having
266 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
268 static struct acpi_bus_type __initdata acpi_pnp_bus = {
269 .bus = &pnp_bus_type,
270 .find_device = acpi_pnp_find_device,
273 int pnpacpi_disabled __initdata;
274 static int __init pnpacpi_init(void)
276 if (acpi_disabled || pnpacpi_disabled) {
277 pnp_info("PnP ACPI: disabled");
280 pnp_info("PnP ACPI init");
281 pnp_register_protocol(&pnpacpi_protocol);
282 register_acpi_bus_type(&acpi_pnp_bus);
283 acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
284 pnp_info("PnP ACPI: found %d devices", num);
285 unregister_acpi_bus_type(&acpi_pnp_bus);
286 pnp_platform_devices = 1;
290 subsys_initcall(pnpacpi_init);
292 static int __init pnpacpi_setup(char *str)
296 if (!strncmp(str, "off", 3))
297 pnpacpi_disabled = 1;
301 __setup("pnpacpi=", pnpacpi_setup);