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
)
133 return acpi_bus_set_power((acpi_handle
) dev
->data
,
134 acpi_pm_device_sleep_state(&dev
->dev
,
140 static int pnpacpi_resume(struct pnp_dev
*dev
)
142 return acpi_bus_set_power((acpi_handle
) dev
->data
, ACPI_STATE_D0
);
146 static struct pnp_protocol pnpacpi_protocol
= {
147 .name
= "Plug and Play ACPI",
148 .get
= pnpacpi_get_resources
,
149 .set
= pnpacpi_set_resources
,
150 .disable
= pnpacpi_disable_resources
,
151 #ifdef CONFIG_ACPI_SLEEP
152 .suspend
= pnpacpi_suspend
,
153 .resume
= pnpacpi_resume
,
157 static int __init
pnpacpi_add_device(struct acpi_device
*device
)
159 acpi_handle temp
= NULL
;
161 struct pnp_id
*dev_id
;
164 status
= acpi_get_handle(device
->handle
, "_CRS", &temp
);
165 if (ACPI_FAILURE(status
) || !ispnpidacpi(acpi_device_hid(device
)) ||
166 is_exclusive_device(device
))
169 pnp_dbg("ACPI device : hid %s", acpi_device_hid(device
));
170 dev
= kzalloc(sizeof(struct pnp_dev
), GFP_KERNEL
);
172 pnp_err("Out of memory");
175 dev
->data
= device
->handle
;
176 /* .enabled means the device can decode the resources */
177 dev
->active
= device
->status
.enabled
;
178 status
= acpi_get_handle(device
->handle
, "_SRS", &temp
);
179 if (ACPI_SUCCESS(status
))
180 dev
->capabilities
|= PNP_CONFIGURABLE
;
181 dev
->capabilities
|= PNP_READ
;
182 if (device
->flags
.dynamic_status
)
183 dev
->capabilities
|= PNP_WRITE
;
184 if (device
->flags
.removable
)
185 dev
->capabilities
|= PNP_REMOVABLE
;
186 status
= acpi_get_handle(device
->handle
, "_DIS", &temp
);
187 if (ACPI_SUCCESS(status
))
188 dev
->capabilities
|= PNP_DISABLE
;
190 dev
->protocol
= &pnpacpi_protocol
;
192 if (strlen(acpi_device_name(device
)))
193 strncpy(dev
->name
, acpi_device_name(device
), sizeof(dev
->name
));
195 strncpy(dev
->name
, acpi_device_bid(device
), sizeof(dev
->name
));
199 /* set the initial values for the PnP device */
200 dev_id
= kzalloc(sizeof(struct pnp_id
), GFP_KERNEL
);
203 pnpidacpi_to_pnpid(acpi_device_hid(device
), dev_id
->id
);
204 pnp_add_id(dev_id
, dev
);
207 /* parse allocated resource */
208 status
= pnpacpi_parse_allocated_resource(device
->handle
,
210 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
211 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
217 if (dev
->capabilities
& PNP_CONFIGURABLE
) {
218 status
= pnpacpi_parse_resource_option_data(device
->handle
,
220 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
221 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
227 /* parse compatible ids */
228 if (device
->flags
.compatible_ids
) {
229 struct acpi_compatible_id_list
*cid_list
= device
->pnp
.cid_list
;
232 for (i
= 0; i
< cid_list
->count
; i
++) {
233 if (!ispnpidacpi(cid_list
->id
[i
].value
))
235 dev_id
= kzalloc(sizeof(struct pnp_id
), GFP_KERNEL
);
239 pnpidacpi_to_pnpid(cid_list
->id
[i
].value
, dev_id
->id
);
240 pnp_add_id(dev_id
, dev
);
244 /* clear out the damaged flags */
246 pnp_init_resource_table(&dev
->res
);
258 static acpi_status __init
pnpacpi_add_device_handler(acpi_handle handle
,
259 u32 lvl
, void *context
,
262 struct acpi_device
*device
;
264 if (!acpi_bus_get_device(handle
, &device
))
265 pnpacpi_add_device(device
);
267 return AE_CTRL_DEPTH
;
271 static int __init
acpi_pnp_match(struct device
*dev
, void *_pnp
)
273 struct acpi_device
*acpi
= to_acpi_device(dev
);
274 struct pnp_dev
*pnp
= _pnp
;
276 /* true means it matched */
277 return acpi
->flags
.hardware_id
278 && !acpi_get_physical_device(acpi
->handle
)
279 && compare_pnp_id(pnp
->id
, acpi
->pnp
.hardware_id
);
282 static int __init
acpi_pnp_find_device(struct device
*dev
, acpi_handle
* handle
)
285 struct acpi_device
*acpi
;
287 adev
= bus_find_device(&acpi_bus_type
, NULL
,
288 to_pnp_dev(dev
), acpi_pnp_match
);
292 acpi
= to_acpi_device(adev
);
293 *handle
= acpi
->handle
;
298 /* complete initialization of a PNPACPI device includes having
299 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
301 static struct acpi_bus_type __initdata acpi_pnp_bus
= {
302 .bus
= &pnp_bus_type
,
303 .find_device
= acpi_pnp_find_device
,
306 int pnpacpi_disabled __initdata
;
307 static int __init
pnpacpi_init(void)
309 if (acpi_disabled
|| pnpacpi_disabled
) {
310 pnp_info("PnP ACPI: disabled");
313 pnp_info("PnP ACPI init");
314 pnp_register_protocol(&pnpacpi_protocol
);
315 register_acpi_bus_type(&acpi_pnp_bus
);
316 acpi_get_devices(NULL
, pnpacpi_add_device_handler
, NULL
, NULL
);
317 pnp_info("PnP ACPI: found %d devices", num
);
318 unregister_acpi_bus_type(&acpi_pnp_bus
);
319 pnp_platform_devices
= 1;
323 subsys_initcall(pnpacpi_init
);
325 static int __init
pnpacpi_setup(char *str
)
329 if (!strncmp(str
, "off", 3))
330 pnpacpi_disabled
= 1;
334 __setup("pnpacpi=", pnpacpi_setup
);