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>
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 acpi_device_id excluded_id_list[] __initdata = {
40 {"PNP0C09", 0}, /* EC */
41 {"PNP0C0F", 0}, /* Link device */
42 {"PNP0000", 0}, /* PIC */
43 {"PNP0100", 0}, /* Timer */
47 static inline int __init 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 int pnpacpi_get_resources(struct pnp_dev *dev)
77 pnp_dbg(&dev->dev, "get resources\n");
78 return pnpacpi_parse_allocated_resource(dev);
81 static int pnpacpi_set_resources(struct pnp_dev *dev)
83 struct acpi_device *acpi_dev = dev->data;
84 acpi_handle handle = acpi_dev->handle;
85 struct acpi_buffer buffer;
88 pnp_dbg(&dev->dev, "set resources\n");
89 ret = pnpacpi_build_resource_template(dev, &buffer);
92 ret = pnpacpi_encode_resources(dev, &buffer);
94 kfree(buffer.pointer);
97 if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
99 else if (acpi_bus_power_manageable(handle))
100 ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
101 kfree(buffer.pointer);
105 static int pnpacpi_disable_resources(struct pnp_dev *dev)
107 struct acpi_device *acpi_dev = dev->data;
108 acpi_handle handle = acpi_dev->handle;
111 dev_dbg(&dev->dev, "disable resources\n");
113 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
115 if (acpi_bus_power_manageable(handle))
116 acpi_bus_set_power(handle, ACPI_STATE_D3);
117 /* continue even if acpi_bus_set_power() fails */
118 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
123 #ifdef CONFIG_ACPI_SLEEP
124 static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
126 struct acpi_device *acpi_dev = dev->data;
127 acpi_handle handle = acpi_dev->handle;
130 power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
132 power_state = (state.event == PM_EVENT_ON) ?
133 ACPI_STATE_D0 : ACPI_STATE_D3;
135 return acpi_bus_set_power(handle, power_state);
138 static int pnpacpi_resume(struct pnp_dev *dev)
140 struct acpi_device *acpi_dev = dev->data;
141 acpi_handle handle = acpi_dev->handle;
143 return acpi_bus_set_power(handle, ACPI_STATE_D0);
147 struct pnp_protocol pnpacpi_protocol = {
148 .name = "Plug and Play ACPI",
149 .get = pnpacpi_get_resources,
150 .set = pnpacpi_set_resources,
151 .disable = pnpacpi_disable_resources,
152 #ifdef CONFIG_ACPI_SLEEP
153 .suspend = pnpacpi_suspend,
154 .resume = pnpacpi_resume,
157 EXPORT_SYMBOL(pnpacpi_protocol);
159 static int __init pnpacpi_add_device(struct acpi_device *device)
161 acpi_handle temp = NULL;
164 struct acpi_hardware_id *id;
167 * If a PnPacpi device is not present , the device
168 * driver should not be loaded.
170 status = acpi_get_handle(device->handle, "_CRS", &temp);
171 if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
172 is_exclusive_device(device) || (!device->status.present))
175 dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
180 /* .enabled means the device can decode the resources */
181 dev->active = device->status.enabled;
182 status = acpi_get_handle(device->handle, "_SRS", &temp);
183 if (ACPI_SUCCESS(status))
184 dev->capabilities |= PNP_CONFIGURABLE;
185 dev->capabilities |= PNP_READ;
186 if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
187 dev->capabilities |= PNP_WRITE;
188 if (device->flags.removable)
189 dev->capabilities |= PNP_REMOVABLE;
190 status = acpi_get_handle(device->handle, "_DIS", &temp);
191 if (ACPI_SUCCESS(status))
192 dev->capabilities |= PNP_DISABLE;
194 if (strlen(acpi_device_name(device)))
195 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
197 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
200 pnpacpi_parse_allocated_resource(dev);
202 if (dev->capabilities & PNP_CONFIGURABLE)
203 pnpacpi_parse_resource_option_data(dev);
205 list_for_each_entry(id, &device->pnp.ids, list) {
206 if (!strcmp(id->id, acpi_device_hid(device)))
208 if (!ispnpidacpi(id->id))
210 pnp_add_id(dev, id->id);
213 /* clear out the damaged flags */
215 pnp_init_resources(dev);
222 static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
223 u32 lvl, void *context,
226 struct acpi_device *device;
228 if (!acpi_bus_get_device(handle, &device))
229 pnpacpi_add_device(device);
231 return AE_CTRL_DEPTH;
235 static int __init acpi_pnp_match(struct device *dev, void *_pnp)
237 struct acpi_device *acpi = to_acpi_device(dev);
238 struct pnp_dev *pnp = _pnp;
240 /* true means it matched */
241 return !acpi_get_physical_device(acpi->handle)
242 && compare_pnp_id(pnp->id, acpi_device_hid(acpi));
245 static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
248 struct acpi_device *acpi;
250 adev = bus_find_device(&acpi_bus_type, NULL,
251 to_pnp_dev(dev), acpi_pnp_match);
255 acpi = to_acpi_device(adev);
256 *handle = acpi->handle;
261 /* complete initialization of a PNPACPI device includes having
262 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
264 static struct acpi_bus_type __initdata acpi_pnp_bus = {
265 .bus = &pnp_bus_type,
266 .find_device = acpi_pnp_find_device,
269 int pnpacpi_disabled __initdata;
270 static int __init pnpacpi_init(void)
272 if (acpi_disabled || pnpacpi_disabled) {
273 printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
276 printk(KERN_INFO "pnp: PnP ACPI init\n");
277 pnp_register_protocol(&pnpacpi_protocol);
278 register_acpi_bus_type(&acpi_pnp_bus);
279 acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
280 printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
281 unregister_acpi_bus_type(&acpi_pnp_bus);
282 pnp_platform_devices = 1;
286 fs_initcall(pnpacpi_init);
288 static int __init pnpacpi_setup(char *str)
292 if (!strncmp(str, "off", 3))
293 pnpacpi_disabled = 1;
297 __setup("pnpacpi=", pnpacpi_setup);