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 <acpi/acpi_bus.h>
29 /* We need only to blacklist devices that have already an acpi driver that
30 * can't use pnp layer. We don't need to blacklist device that are directly
31 * used by the kernel (PCI root, ...), as it is harmless and there were
32 * already present in pnpbios. But there is an exception for devices that
33 * have irqs (PIC, Timer) because we call acpi_register_gsi.
34 * Finaly only devices that have a CRS method need to be in this list.
36 static char __initdata excluded_id_list
[] =
38 "PNP0C0F," /* Link device */
40 "PNP0100," /* Timer */
42 static inline int is_exclusive_device(struct acpi_device
*dev
)
44 return (!acpi_match_ids(dev
, excluded_id_list
));
48 * Compatible Device IDs
51 if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
53 #define TEST_ALPHA(c) \
54 if (!('@' <= (c) || (c) <= 'Z')) \
56 static int __init
ispnpidacpi(char *id
)
70 static void __init
pnpidacpi_to_pnpid(char *id
, char *str
)
75 str
[3] = tolower(id
[3]);
76 str
[4] = tolower(id
[4]);
77 str
[5] = tolower(id
[5]);
78 str
[6] = tolower(id
[6]);
82 static int pnpacpi_get_resources(struct pnp_dev
* dev
, struct pnp_resource_table
* res
)
85 status
= pnpacpi_parse_allocated_resource((acpi_handle
)dev
->data
,
87 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
90 static int pnpacpi_set_resources(struct pnp_dev
* dev
, struct pnp_resource_table
* res
)
92 acpi_handle handle
= dev
->data
;
93 struct acpi_buffer buffer
;
97 ret
= pnpacpi_build_resource_template(handle
, &buffer
);
100 ret
= pnpacpi_encode_resources(res
, &buffer
);
102 kfree(buffer
.pointer
);
105 status
= acpi_set_current_resources(handle
, &buffer
);
106 if (ACPI_FAILURE(status
))
108 kfree(buffer
.pointer
);
112 static int pnpacpi_disable_resources(struct pnp_dev
*dev
)
116 /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
117 status
= acpi_evaluate_object((acpi_handle
)dev
->data
,
119 return ACPI_FAILURE(status
) ? -ENODEV
: 0;
122 static struct pnp_protocol pnpacpi_protocol
= {
123 .name
= "Plug and Play ACPI",
124 .get
= pnpacpi_get_resources
,
125 .set
= pnpacpi_set_resources
,
126 .disable
= pnpacpi_disable_resources
,
129 static int __init
pnpacpi_add_device(struct acpi_device
*device
)
131 acpi_handle temp
= NULL
;
133 struct pnp_id
*dev_id
;
136 status
= acpi_get_handle(device
->handle
, "_CRS", &temp
);
137 if (ACPI_FAILURE(status
) || !ispnpidacpi(acpi_device_hid(device
)) ||
138 is_exclusive_device(device
))
141 pnp_dbg("ACPI device : hid %s", acpi_device_hid(device
));
142 dev
= kzalloc(sizeof(struct pnp_dev
), GFP_KERNEL
);
144 pnp_err("Out of memory");
147 dev
->data
= device
->handle
;
148 /* .enabled means if the device can decode the resources */
149 dev
->active
= device
->status
.enabled
;
150 status
= acpi_get_handle(device
->handle
, "_SRS", &temp
);
151 if (ACPI_SUCCESS(status
))
152 dev
->capabilities
|= PNP_CONFIGURABLE
;
153 dev
->capabilities
|= PNP_READ
;
154 if (device
->flags
.dynamic_status
)
155 dev
->capabilities
|= PNP_WRITE
;
156 if (device
->flags
.removable
)
157 dev
->capabilities
|= PNP_REMOVABLE
;
158 status
= acpi_get_handle(device
->handle
, "_DIS", &temp
);
159 if (ACPI_SUCCESS(status
))
160 dev
->capabilities
|= PNP_DISABLE
;
162 dev
->protocol
= &pnpacpi_protocol
;
164 if (strlen(acpi_device_name(device
)))
165 strncpy(dev
->name
, acpi_device_name(device
), sizeof(dev
->name
));
167 strncpy(dev
->name
, acpi_device_bid(device
), sizeof(dev
->name
));
171 /* set the initial values for the PnP device */
172 dev_id
= kzalloc(sizeof(struct pnp_id
), GFP_KERNEL
);
175 pnpidacpi_to_pnpid(acpi_device_hid(device
), dev_id
->id
);
176 pnp_add_id(dev_id
, dev
);
179 /* parse allocated resource */
180 status
= pnpacpi_parse_allocated_resource(device
->handle
, &dev
->res
);
181 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
182 pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s", dev_id
->id
);
187 if(dev
->capabilities
& PNP_CONFIGURABLE
) {
188 status
= pnpacpi_parse_resource_option_data(device
->handle
,
190 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
191 pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", dev_id
->id
);
196 /* parse compatible ids */
197 if (device
->flags
.compatible_ids
) {
198 struct acpi_compatible_id_list
*cid_list
= device
->pnp
.cid_list
;
201 for (i
= 0; i
< cid_list
->count
; i
++) {
202 if (!ispnpidacpi(cid_list
->id
[i
].value
))
204 dev_id
= kzalloc(sizeof(struct pnp_id
), GFP_KERNEL
);
208 pnpidacpi_to_pnpid(cid_list
->id
[i
].value
, dev_id
->id
);
209 pnp_add_id(dev_id
, dev
);
213 /* clear out the damaged flags */
215 pnp_init_resource_table(&dev
->res
);
227 static acpi_status __init
pnpacpi_add_device_handler(acpi_handle handle
,
228 u32 lvl
, void *context
, void **rv
)
230 struct acpi_device
*device
;
232 if (!acpi_bus_get_device(handle
, &device
))
233 pnpacpi_add_device(device
);
235 return AE_CTRL_DEPTH
;
239 int pnpacpi_disabled __initdata
;
240 static int __init
pnpacpi_init(void)
242 if (acpi_disabled
|| pnpacpi_disabled
) {
243 pnp_info("PnP ACPI: disabled");
246 pnp_info("PnP ACPI init");
247 pnp_register_protocol(&pnpacpi_protocol
);
248 acpi_get_devices(NULL
, pnpacpi_add_device_handler
, NULL
, NULL
);
249 pnp_info("PnP ACPI: found %d devices", num
);
252 subsys_initcall(pnpacpi_init
);
254 static int __init
pnpacpi_setup(char *str
)
258 if (!strncmp(str
, "off", 3))
259 pnpacpi_disabled
= 1;
262 __setup("pnpacpi=", pnpacpi_setup
);
265 EXPORT_SYMBOL(pnpacpi_protocol
);