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 __init
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
)
78 pnp_dbg(&dev
->dev
, "get resources\n");
79 return pnpacpi_parse_allocated_resource(dev
);
82 static int pnpacpi_set_resources(struct pnp_dev
*dev
)
84 acpi_handle handle
= dev
->data
;
85 struct acpi_buffer buffer
;
89 pnp_dbg(&dev
->dev
, "set resources\n");
90 ret
= pnpacpi_build_resource_template(dev
, &buffer
);
93 ret
= pnpacpi_encode_resources(dev
, &buffer
);
95 kfree(buffer
.pointer
);
98 status
= acpi_set_current_resources(handle
, &buffer
);
99 if (ACPI_FAILURE(status
))
101 kfree(buffer
.pointer
);
105 static int pnpacpi_disable_resources(struct pnp_dev
*dev
)
109 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
110 status
= acpi_evaluate_object((acpi_handle
) dev
->data
,
112 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
115 #ifdef CONFIG_ACPI_SLEEP
116 static int pnpacpi_suspend(struct pnp_dev
*dev
, pm_message_t state
)
120 power_state
= acpi_pm_device_sleep_state(&dev
->dev
, NULL
);
122 power_state
= (state
.event
== PM_EVENT_ON
) ?
123 ACPI_STATE_D0
: ACPI_STATE_D3
;
125 return acpi_bus_set_power((acpi_handle
) dev
->data
, power_state
);
128 static int pnpacpi_resume(struct pnp_dev
*dev
)
130 return acpi_bus_set_power((acpi_handle
) dev
->data
, ACPI_STATE_D0
);
134 static struct pnp_protocol pnpacpi_protocol
= {
135 .name
= "Plug and Play ACPI",
136 .get
= pnpacpi_get_resources
,
137 .set
= pnpacpi_set_resources
,
138 .disable
= pnpacpi_disable_resources
,
139 #ifdef CONFIG_ACPI_SLEEP
140 .suspend
= pnpacpi_suspend
,
141 .resume
= pnpacpi_resume
,
145 static int __init
pnpacpi_add_device(struct acpi_device
*device
)
147 acpi_handle temp
= NULL
;
152 * If a PnPacpi device is not present , the device
153 * driver should not be loaded.
155 status
= acpi_get_handle(device
->handle
, "_CRS", &temp
);
156 if (ACPI_FAILURE(status
) || !ispnpidacpi(acpi_device_hid(device
)) ||
157 is_exclusive_device(device
) || (!device
->status
.present
))
160 dev
= pnp_alloc_dev(&pnpacpi_protocol
, num
, acpi_device_hid(device
));
164 dev
->data
= device
->handle
;
165 /* .enabled means the device can decode the resources */
166 dev
->active
= device
->status
.enabled
;
167 status
= acpi_get_handle(device
->handle
, "_SRS", &temp
);
168 if (ACPI_SUCCESS(status
))
169 dev
->capabilities
|= PNP_CONFIGURABLE
;
170 dev
->capabilities
|= PNP_READ
;
171 if (device
->flags
.dynamic_status
&& (dev
->capabilities
& PNP_CONFIGURABLE
))
172 dev
->capabilities
|= PNP_WRITE
;
173 if (device
->flags
.removable
)
174 dev
->capabilities
|= PNP_REMOVABLE
;
175 status
= acpi_get_handle(device
->handle
, "_DIS", &temp
);
176 if (ACPI_SUCCESS(status
))
177 dev
->capabilities
|= PNP_DISABLE
;
179 if (strlen(acpi_device_name(device
)))
180 strncpy(dev
->name
, acpi_device_name(device
), sizeof(dev
->name
));
182 strncpy(dev
->name
, acpi_device_bid(device
), sizeof(dev
->name
));
185 pnpacpi_parse_allocated_resource(dev
);
187 if (dev
->capabilities
& PNP_CONFIGURABLE
)
188 pnpacpi_parse_resource_option_data(dev
);
190 if (device
->flags
.compatible_ids
) {
191 struct acpi_compatible_id_list
*cid_list
= device
->pnp
.cid_list
;
194 for (i
= 0; i
< cid_list
->count
; i
++) {
195 if (!ispnpidacpi(cid_list
->id
[i
].value
))
197 pnp_add_id(dev
, cid_list
->id
[i
].value
);
201 /* clear out the damaged flags */
203 pnp_init_resources(dev
);
210 static acpi_status __init
pnpacpi_add_device_handler(acpi_handle handle
,
211 u32 lvl
, void *context
,
214 struct acpi_device
*device
;
216 if (!acpi_bus_get_device(handle
, &device
))
217 pnpacpi_add_device(device
);
219 return AE_CTRL_DEPTH
;
223 static int __init
acpi_pnp_match(struct device
*dev
, void *_pnp
)
225 struct acpi_device
*acpi
= to_acpi_device(dev
);
226 struct pnp_dev
*pnp
= _pnp
;
228 /* true means it matched */
229 return acpi
->flags
.hardware_id
230 && !acpi_get_physical_device(acpi
->handle
)
231 && compare_pnp_id(pnp
->id
, acpi
->pnp
.hardware_id
);
234 static int __init
acpi_pnp_find_device(struct device
*dev
, acpi_handle
* handle
)
237 struct acpi_device
*acpi
;
239 adev
= bus_find_device(&acpi_bus_type
, NULL
,
240 to_pnp_dev(dev
), acpi_pnp_match
);
244 acpi
= to_acpi_device(adev
);
245 *handle
= acpi
->handle
;
250 /* complete initialization of a PNPACPI device includes having
251 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
253 static struct acpi_bus_type __initdata acpi_pnp_bus
= {
254 .bus
= &pnp_bus_type
,
255 .find_device
= acpi_pnp_find_device
,
258 int pnpacpi_disabled __initdata
;
259 static int __init
pnpacpi_init(void)
261 if (acpi_disabled
|| pnpacpi_disabled
) {
262 printk(KERN_INFO
"pnp: PnP ACPI: disabled\n");
265 printk(KERN_INFO
"pnp: PnP ACPI init\n");
266 pnp_register_protocol(&pnpacpi_protocol
);
267 register_acpi_bus_type(&acpi_pnp_bus
);
268 acpi_get_devices(NULL
, pnpacpi_add_device_handler
, NULL
, NULL
);
269 printk(KERN_INFO
"pnp: PnP ACPI: found %d devices\n", num
);
270 unregister_acpi_bus_type(&acpi_pnp_bus
);
271 pnp_platform_devices
= 1;
275 fs_initcall(pnpacpi_init
);
277 static int __init
pnpacpi_setup(char *str
)
281 if (!strncmp(str
, "off", 3))
282 pnpacpi_disabled
= 1;
286 __setup("pnpacpi=", pnpacpi_setup
);