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 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
132 return acpi_bus_set_power((acpi_handle) dev->data,
133 acpi_pm_device_sleep_state(&dev->dev,
139 static int pnpacpi_resume(struct pnp_dev *dev)
141 return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
144 static struct pnp_protocol pnpacpi_protocol = {
145 .name = "Plug and Play ACPI",
146 .get = pnpacpi_get_resources,
147 .set = pnpacpi_set_resources,
148 .disable = pnpacpi_disable_resources,
149 .suspend = pnpacpi_suspend,
150 .resume = pnpacpi_resume,
153 static int __init pnpacpi_add_device(struct acpi_device *device)
155 acpi_handle temp = NULL;
157 struct pnp_id *dev_id;
160 status = acpi_get_handle(device->handle, "_CRS", &temp);
161 if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
162 is_exclusive_device(device))
165 pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
166 dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
168 pnp_err("Out of memory");
171 dev->data = device->handle;
172 /* .enabled means the device can decode the resources */
173 dev->active = device->status.enabled;
174 status = acpi_get_handle(device->handle, "_SRS", &temp);
175 if (ACPI_SUCCESS(status))
176 dev->capabilities |= PNP_CONFIGURABLE;
177 dev->capabilities |= PNP_READ;
178 if (device->flags.dynamic_status)
179 dev->capabilities |= PNP_WRITE;
180 if (device->flags.removable)
181 dev->capabilities |= PNP_REMOVABLE;
182 status = acpi_get_handle(device->handle, "_DIS", &temp);
183 if (ACPI_SUCCESS(status))
184 dev->capabilities |= PNP_DISABLE;
186 dev->protocol = &pnpacpi_protocol;
188 if (strlen(acpi_device_name(device)))
189 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
191 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
195 /* set the initial values for the PnP device */
196 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
199 pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
200 pnp_add_id(dev_id, dev);
203 /* parse allocated resource */
204 status = pnpacpi_parse_allocated_resource(device->handle,
206 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
207 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
213 if (dev->capabilities & PNP_CONFIGURABLE) {
214 status = pnpacpi_parse_resource_option_data(device->handle,
216 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
217 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
223 /* parse compatible ids */
224 if (device->flags.compatible_ids) {
225 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
228 for (i = 0; i < cid_list->count; i++) {
229 if (!ispnpidacpi(cid_list->id[i].value))
231 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
235 pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
236 pnp_add_id(dev_id, dev);
240 /* clear out the damaged flags */
242 pnp_init_resource_table(&dev->res);
254 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
255 u32 lvl, void *context,
258 struct acpi_device *device;
260 if (!acpi_bus_get_device(handle, &device))
261 pnpacpi_add_device(device);
263 return AE_CTRL_DEPTH;
267 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
269 struct acpi_device *acpi = to_acpi_device(dev);
270 struct pnp_dev *pnp = _pnp;
272 /* true means it matched */
273 return acpi->flags.hardware_id
274 && !acpi_get_physical_device(acpi->handle)
275 && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
278 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
281 struct acpi_device *acpi;
283 adev = bus_find_device(&acpi_bus_type, NULL,
284 to_pnp_dev(dev), acpi_pnp_match);
288 acpi = to_acpi_device(adev);
289 *handle = acpi->handle;
294 /* complete initialization of a PNPACPI device includes having
295 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
297 static struct acpi_bus_type __initdata acpi_pnp_bus = {
298 .bus = &pnp_bus_type,
299 .find_device = acpi_pnp_find_device,
302 int pnpacpi_disabled __initdata;
303 static int __init pnpacpi_init(void)
305 if (acpi_disabled || pnpacpi_disabled) {
306 pnp_info("PnP ACPI: disabled");
309 pnp_info("PnP ACPI init");
310 pnp_register_protocol(&pnpacpi_protocol);
311 register_acpi_bus_type(&acpi_pnp_bus);
312 acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
313 pnp_info("PnP ACPI: found %d devices", num);
314 unregister_acpi_bus_type(&acpi_pnp_bus);
315 pnp_platform_devices = 1;
319 subsys_initcall(pnpacpi_init);
321 static int __init pnpacpi_setup(char *str)
325 if (!strncmp(str, "off", 3))
326 pnpacpi_disabled = 1;
330 __setup("pnpacpi=", pnpacpi_setup);