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
)
80 dev_dbg(&dev
->dev
, "get resources\n");
81 status
= pnpacpi_parse_allocated_resource(dev
);
82 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
85 static int pnpacpi_set_resources(struct pnp_dev
*dev
)
87 acpi_handle handle
= dev
->data
;
88 struct acpi_buffer buffer
;
92 dev_dbg(&dev
->dev
, "set resources\n");
93 ret
= pnpacpi_build_resource_template(dev
, &buffer
);
96 ret
= pnpacpi_encode_resources(dev
, &buffer
);
98 kfree(buffer
.pointer
);
101 status
= acpi_set_current_resources(handle
, &buffer
);
102 if (ACPI_FAILURE(status
))
104 kfree(buffer
.pointer
);
108 static int pnpacpi_disable_resources(struct pnp_dev
*dev
)
112 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
113 status
= acpi_evaluate_object((acpi_handle
) dev
->data
,
115 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
118 #ifdef CONFIG_ACPI_SLEEP
119 static int pnpacpi_suspend(struct pnp_dev
*dev
, pm_message_t state
)
123 power_state
= acpi_pm_device_sleep_state(&dev
->dev
,
124 device_may_wakeup(&dev
->dev
),
127 power_state
= (state
.event
== PM_EVENT_ON
) ?
128 ACPI_STATE_D0
: ACPI_STATE_D3
;
130 return acpi_bus_set_power((acpi_handle
) dev
->data
, power_state
);
133 static int pnpacpi_resume(struct pnp_dev
*dev
)
135 return acpi_bus_set_power((acpi_handle
) dev
->data
, ACPI_STATE_D0
);
139 static struct pnp_protocol pnpacpi_protocol
= {
140 .name
= "Plug and Play ACPI",
141 .get
= pnpacpi_get_resources
,
142 .set
= pnpacpi_set_resources
,
143 .disable
= pnpacpi_disable_resources
,
144 #ifdef CONFIG_ACPI_SLEEP
145 .suspend
= pnpacpi_suspend
,
146 .resume
= pnpacpi_resume
,
150 static int __init
pnpacpi_add_device(struct acpi_device
*device
)
152 acpi_handle temp
= NULL
;
156 status
= acpi_get_handle(device
->handle
, "_CRS", &temp
);
157 if (ACPI_FAILURE(status
) || !ispnpidacpi(acpi_device_hid(device
)) ||
158 is_exclusive_device(device
))
161 dev
= pnp_alloc_dev(&pnpacpi_protocol
, num
, acpi_device_hid(device
));
165 dev
->data
= device
->handle
;
166 /* .enabled means the device can decode the resources */
167 dev
->active
= device
->status
.enabled
;
168 status
= acpi_get_handle(device
->handle
, "_SRS", &temp
);
169 if (ACPI_SUCCESS(status
))
170 dev
->capabilities
|= PNP_CONFIGURABLE
;
171 dev
->capabilities
|= PNP_READ
;
172 if (device
->flags
.dynamic_status
&& (dev
->capabilities
& PNP_CONFIGURABLE
))
173 dev
->capabilities
|= PNP_WRITE
;
174 if (device
->flags
.removable
)
175 dev
->capabilities
|= PNP_REMOVABLE
;
176 status
= acpi_get_handle(device
->handle
, "_DIS", &temp
);
177 if (ACPI_SUCCESS(status
))
178 dev
->capabilities
|= PNP_DISABLE
;
180 if (strlen(acpi_device_name(device
)))
181 strncpy(dev
->name
, acpi_device_name(device
), sizeof(dev
->name
));
183 strncpy(dev
->name
, acpi_device_bid(device
), sizeof(dev
->name
));
186 /* parse allocated resource */
187 status
= pnpacpi_parse_allocated_resource(dev
);
188 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
189 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
190 acpi_device_hid(device
));
194 if (dev
->capabilities
& PNP_CONFIGURABLE
) {
195 status
= pnpacpi_parse_resource_option_data(dev
);
196 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
197 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
198 acpi_device_hid(device
));
202 if (device
->flags
.compatible_ids
) {
203 struct acpi_compatible_id_list
*cid_list
= device
->pnp
.cid_list
;
206 for (i
= 0; i
< cid_list
->count
; i
++) {
207 if (!ispnpidacpi(cid_list
->id
[i
].value
))
209 pnp_add_id(dev
, cid_list
->id
[i
].value
);
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
->flags
.hardware_id
242 && !acpi_get_physical_device(acpi
->handle
)
243 && compare_pnp_id(pnp
->id
, acpi
->pnp
.hardware_id
);
246 static int __init
acpi_pnp_find_device(struct device
*dev
, acpi_handle
* handle
)
249 struct acpi_device
*acpi
;
251 adev
= bus_find_device(&acpi_bus_type
, NULL
,
252 to_pnp_dev(dev
), acpi_pnp_match
);
256 acpi
= to_acpi_device(adev
);
257 *handle
= acpi
->handle
;
262 /* complete initialization of a PNPACPI device includes having
263 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
265 static struct acpi_bus_type __initdata acpi_pnp_bus
= {
266 .bus
= &pnp_bus_type
,
267 .find_device
= acpi_pnp_find_device
,
270 int pnpacpi_disabled __initdata
;
271 static int __init
pnpacpi_init(void)
273 if (acpi_disabled
|| pnpacpi_disabled
) {
274 pnp_info("PnP ACPI: disabled");
277 pnp_info("PnP ACPI init");
278 pnp_register_protocol(&pnpacpi_protocol
);
279 register_acpi_bus_type(&acpi_pnp_bus
);
280 acpi_get_devices(NULL
, pnpacpi_add_device_handler
, NULL
, NULL
);
281 pnp_info("PnP ACPI: found %d devices", num
);
282 unregister_acpi_bus_type(&acpi_pnp_bus
);
283 pnp_platform_devices
= 1;
287 subsys_initcall(pnpacpi_init
);
289 static int __init
pnpacpi_setup(char *str
)
293 if (!strncmp(str
, "off", 3))
294 pnpacpi_disabled
= 1;
298 __setup("pnpacpi=", pnpacpi_setup
);