Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * pnpbios -- PnP BIOS driver | |
3 | * | |
4 | * This driver provides access to Plug-'n'-Play services provided by | |
5 | * the PnP BIOS firmware, described in the following documents: | |
6 | * Plug and Play BIOS Specification, Version 1.0A, 5 May 1994 | |
7 | * Plug and Play BIOS Clarification Paper, 6 October 1994 | |
8 | * Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corp. | |
9 | * | |
10 | * Originally (C) 1998 Christian Schmidt <schmidt@digadd.de> | |
11 | * Modifications (C) 1998 Tom Lees <tom@lpsg.demon.co.uk> | |
12 | * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net> | |
13 | * Further modifications (C) 2001, 2002 by: | |
14 | * Alan Cox <alan@redhat.com> | |
15 | * Thomas Hood | |
16 | * Brian Gerst <bgerst@didntduck.org> | |
17 | * | |
18 | * Ported to the PnP Layer and several additional improvements (C) 2002 | |
19 | * by Adam Belay <ambx1@neo.rr.com> | |
20 | * | |
21 | * This program is free software; you can redistribute it and/or modify it | |
22 | * under the terms of the GNU General Public License as published by the | |
23 | * Free Software Foundation; either version 2, or (at your option) any | |
24 | * later version. | |
25 | * | |
26 | * This program is distributed in the hope that it will be useful, but | |
27 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
29 | * General Public License for more details. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License | |
32 | * along with this program; if not, write to the Free Software | |
33 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
34 | */ | |
9dd78466 | 35 | |
1da177e4 LT |
36 | /* Change Log |
37 | * | |
38 | * Adam Belay - <ambx1@neo.rr.com> - March 16, 2003 | |
39 | * rev 1.01 Only call pnp_bios_dev_node_info once | |
40 | * Added pnpbios_print_status | |
41 | * Added several new error messages and info messages | |
42 | * Added pnpbios_interface_attach_device | |
43 | * integrated core and proc init system | |
44 | * Introduced PNPMODE flags | |
45 | * Removed some useless includes | |
46 | */ | |
47 | ||
48 | #include <linux/types.h> | |
49 | #include <linux/module.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/linkage.h> | |
52 | #include <linux/kernel.h> | |
1da177e4 LT |
53 | #include <linux/device.h> |
54 | #include <linux/pnp.h> | |
55 | #include <linux/mm.h> | |
56 | #include <linux/smp.h> | |
57 | #include <linux/slab.h> | |
1da177e4 LT |
58 | #include <linux/completion.h> |
59 | #include <linux/spinlock.h> | |
60 | #include <linux/dmi.h> | |
61 | #include <linux/delay.h> | |
62 | #include <linux/acpi.h> | |
7dfb7103 | 63 | #include <linux/freezer.h> |
db9c02fa | 64 | #include <linux/kthread.h> |
1da177e4 LT |
65 | |
66 | #include <asm/page.h> | |
67 | #include <asm/desc.h> | |
1da177e4 LT |
68 | #include <asm/byteorder.h> |
69 | ||
1692b27b | 70 | #include "../base.h" |
1da177e4 LT |
71 | #include "pnpbios.h" |
72 | ||
1da177e4 LT |
73 | /* |
74 | * | |
75 | * PnP BIOS INTERFACE | |
76 | * | |
77 | */ | |
78 | ||
9dd78466 | 79 | static union pnp_bios_install_struct *pnp_bios_install = NULL; |
1da177e4 LT |
80 | |
81 | int pnp_bios_present(void) | |
82 | { | |
83 | return (pnp_bios_install != NULL); | |
84 | } | |
85 | ||
86 | struct pnp_dev_node_info node_info; | |
87 | ||
1da177e4 LT |
88 | /* |
89 | * | |
90 | * DOCKING FUNCTIONS | |
91 | * | |
92 | */ | |
93 | ||
1da177e4 LT |
94 | static struct completion unload_sem; |
95 | ||
96 | /* | |
97 | * (Much of this belongs in a shared routine somewhere) | |
98 | */ | |
1da177e4 LT |
99 | static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) |
100 | { | |
9dd78466 | 101 | char *argv[3], **envp, *buf, *scratch; |
1da177e4 LT |
102 | int i = 0, value; |
103 | ||
07d4e9af | 104 | if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL))) |
1da177e4 | 105 | return -ENOMEM; |
cd861280 | 106 | if (!(buf = kzalloc(256, GFP_KERNEL))) { |
9dd78466 | 107 | kfree(envp); |
1da177e4 LT |
108 | return -ENOMEM; |
109 | } | |
110 | ||
07d4e9af BH |
111 | /* FIXME: if there are actual users of this, it should be |
112 | * integrated into the driver core and use the usual infrastructure | |
113 | * like sysfs and uevents | |
114 | */ | |
9dd78466 BH |
115 | argv[0] = "/sbin/pnpbios"; |
116 | argv[1] = "dock"; | |
117 | argv[2] = NULL; | |
1da177e4 LT |
118 | |
119 | /* minimal command environment */ | |
9dd78466 BH |
120 | envp[i++] = "HOME=/"; |
121 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
1da177e4 LT |
122 | |
123 | #ifdef DEBUG | |
124 | /* hint that policy agent should enter no-stdout debug mode */ | |
9dd78466 | 125 | envp[i++] = "DEBUG=kernel"; |
1da177e4 LT |
126 | #endif |
127 | /* extensible set of named bus-specific parameters, | |
128 | * supporting multiple driver selection algorithms. | |
129 | */ | |
130 | scratch = buf; | |
131 | ||
132 | /* action: add, remove */ | |
9dd78466 BH |
133 | envp[i++] = scratch; |
134 | scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1; | |
1da177e4 LT |
135 | |
136 | /* Report the ident for the dock */ | |
9dd78466 BH |
137 | envp[i++] = scratch; |
138 | scratch += sprintf(scratch, "DOCK=%x/%x/%x", | |
139 | info->location_id, info->serial, info->capabilities); | |
1da177e4 | 140 | envp[i] = NULL; |
9dd78466 | 141 | |
07d4e9af | 142 | value = call_usermodehelper(argv [0], argv, envp, UMH_WAIT_EXEC); |
9dd78466 BH |
143 | kfree(buf); |
144 | kfree(envp); | |
1da177e4 LT |
145 | return 0; |
146 | } | |
147 | ||
148 | /* | |
149 | * Poll the PnP docking at regular intervals | |
150 | */ | |
9dd78466 | 151 | static int pnp_dock_thread(void *unused) |
1da177e4 LT |
152 | { |
153 | static struct pnp_docking_station_info now; | |
154 | int docked = -1, d = 0; | |
07d4e9af | 155 | |
83144186 | 156 | set_freezable(); |
b277c884 | 157 | while (1) { |
1da177e4 | 158 | int status; |
9dd78466 | 159 | |
1da177e4 LT |
160 | /* |
161 | * Poll every 2 seconds | |
162 | */ | |
163 | msleep_interruptible(2000); | |
164 | ||
db9c02fa EB |
165 | if (try_to_freeze()) |
166 | continue; | |
1da177e4 LT |
167 | |
168 | status = pnp_bios_dock_station_info(&now); | |
169 | ||
9dd78466 | 170 | switch (status) { |
1da177e4 LT |
171 | /* |
172 | * No dock to manage | |
173 | */ | |
9dd78466 BH |
174 | case PNP_FUNCTION_NOT_SUPPORTED: |
175 | complete_and_exit(&unload_sem, 0); | |
176 | case PNP_SYSTEM_NOT_DOCKED: | |
177 | d = 0; | |
178 | break; | |
179 | case PNP_SUCCESS: | |
180 | d = 1; | |
181 | break; | |
182 | default: | |
183 | pnpbios_print_status("pnp_dock_thread", status); | |
625505b5 AC |
184 | printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n"); |
185 | complete_and_exit(&unload_sem, 0); | |
1da177e4 | 186 | } |
9dd78466 BH |
187 | if (d != docked) { |
188 | if (pnp_dock_event(d, &now) == 0) { | |
1da177e4 LT |
189 | docked = d; |
190 | #if 0 | |
9dd78466 BH |
191 | printk(KERN_INFO |
192 | "PnPBIOS: Docking station %stached\n", | |
193 | docked ? "at" : "de"); | |
1da177e4 LT |
194 | #endif |
195 | } | |
196 | } | |
197 | } | |
198 | complete_and_exit(&unload_sem, 0); | |
199 | } | |
200 | ||
59284cb4 | 201 | static int pnpbios_get_resources(struct pnp_dev *dev) |
1da177e4 LT |
202 | { |
203 | u8 nodenum = dev->number; | |
9dd78466 | 204 | struct pnp_bios_node *node; |
1da177e4 | 205 | |
9dd78466 | 206 | if (!pnpbios_is_dynamic(dev)) |
1da177e4 LT |
207 | return -EPERM; |
208 | ||
2f53432c | 209 | pnp_dbg(&dev->dev, "get resources\n"); |
cd861280 | 210 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
211 | if (!node) |
212 | return -1; | |
9dd78466 | 213 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
214 | kfree(node); |
215 | return -ENODEV; | |
216 | } | |
4ab55d8d | 217 | pnpbios_read_resources_from_node(dev, node); |
1da177e4 LT |
218 | dev->active = pnp_is_active(dev); |
219 | kfree(node); | |
220 | return 0; | |
221 | } | |
222 | ||
59284cb4 | 223 | static int pnpbios_set_resources(struct pnp_dev *dev) |
1da177e4 LT |
224 | { |
225 | u8 nodenum = dev->number; | |
9dd78466 | 226 | struct pnp_bios_node *node; |
1da177e4 LT |
227 | int ret; |
228 | ||
1da177e4 LT |
229 | if (!pnpbios_is_dynamic(dev)) |
230 | return -EPERM; | |
231 | ||
2f53432c | 232 | pnp_dbg(&dev->dev, "set resources\n"); |
cd861280 | 233 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
234 | if (!node) |
235 | return -1; | |
9dd78466 | 236 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
237 | kfree(node); |
238 | return -ENODEV; | |
239 | } | |
4ab55d8d | 240 | if (pnpbios_write_resources_to_node(dev, node) < 0) { |
1da177e4 LT |
241 | kfree(node); |
242 | return -1; | |
243 | } | |
244 | ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); | |
245 | kfree(node); | |
246 | if (ret > 0) | |
247 | ret = -1; | |
248 | return ret; | |
249 | } | |
250 | ||
9dd78466 | 251 | static void pnpbios_zero_data_stream(struct pnp_bios_node *node) |
1da177e4 | 252 | { |
9dd78466 BH |
253 | unsigned char *p = (char *)node->data; |
254 | unsigned char *end = (char *)(node->data + node->size); | |
1da177e4 LT |
255 | unsigned int len; |
256 | int i; | |
07d4e9af | 257 | |
1da177e4 | 258 | while ((char *)p < (char *)end) { |
9dd78466 | 259 | if (p[0] & 0x80) { /* large tag */ |
1da177e4 LT |
260 | len = (p[2] << 8) | p[1]; |
261 | p += 3; | |
262 | } else { | |
9dd78466 | 263 | if (((p[0] >> 3) & 0x0f) == 0x0f) |
1da177e4 LT |
264 | return; |
265 | len = p[0] & 0x07; | |
266 | p += 1; | |
267 | } | |
268 | for (i = 0; i < len; i++) | |
269 | p[i] = 0; | |
270 | p += len; | |
271 | } | |
9dd78466 BH |
272 | printk(KERN_ERR |
273 | "PnPBIOS: Resource structure did not contain an end tag.\n"); | |
1da177e4 LT |
274 | } |
275 | ||
276 | static int pnpbios_disable_resources(struct pnp_dev *dev) | |
277 | { | |
9dd78466 | 278 | struct pnp_bios_node *node; |
1da177e4 LT |
279 | u8 nodenum = dev->number; |
280 | int ret; | |
281 | ||
9dd78466 | 282 | if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) |
1da177e4 LT |
283 | return -EPERM; |
284 | ||
cd861280 | 285 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
286 | if (!node) |
287 | return -ENOMEM; | |
288 | ||
9dd78466 | 289 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
290 | kfree(node); |
291 | return -ENODEV; | |
292 | } | |
293 | pnpbios_zero_data_stream(node); | |
294 | ||
295 | ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); | |
296 | kfree(node); | |
297 | if (ret > 0) | |
298 | ret = -1; | |
299 | return ret; | |
300 | } | |
301 | ||
302 | /* PnP Layer support */ | |
303 | ||
304 | struct pnp_protocol pnpbios_protocol = { | |
9dd78466 BH |
305 | .name = "Plug and Play BIOS", |
306 | .get = pnpbios_get_resources, | |
307 | .set = pnpbios_set_resources, | |
1da177e4 LT |
308 | .disable = pnpbios_disable_resources, |
309 | }; | |
310 | ||
2bb9a6b3 | 311 | static int __init insert_device(struct pnp_bios_node *node) |
1da177e4 | 312 | { |
9dd78466 | 313 | struct list_head *pos; |
36405e96 | 314 | struct pnp_dev *dev; |
1da177e4 | 315 | char id[8]; |
d8254e0e | 316 | int error; |
1da177e4 LT |
317 | |
318 | /* check if the device is already added */ | |
9dd78466 | 319 | list_for_each(pos, &pnpbios_protocol.devices) { |
36405e96 BH |
320 | dev = list_entry(pos, struct pnp_dev, protocol_list); |
321 | if (dev->number == node->handle) | |
d8254e0e | 322 | return -EEXIST; |
1da177e4 LT |
323 | } |
324 | ||
25eb8461 | 325 | pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id); |
bda1e4e5 BH |
326 | dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id); |
327 | if (!dev) | |
d8254e0e | 328 | return -ENOMEM; |
36405e96 | 329 | |
1da177e4 LT |
330 | pnpbios_parse_data_stream(dev, node); |
331 | dev->active = pnp_is_active(dev); | |
332 | dev->flags = node->flags; | |
333 | if (!(dev->flags & PNPBIOS_NO_CONFIG)) | |
334 | dev->capabilities |= PNP_CONFIGURABLE; | |
3ae19208 | 335 | if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev)) |
1da177e4 LT |
336 | dev->capabilities |= PNP_DISABLE; |
337 | dev->capabilities |= PNP_READ; | |
338 | if (pnpbios_is_dynamic(dev)) | |
339 | dev->capabilities |= PNP_WRITE; | |
340 | if (dev->flags & PNPBIOS_REMOVABLE) | |
341 | dev->capabilities |= PNP_REMOVABLE; | |
1da177e4 LT |
342 | |
343 | /* clear out the damaged flags */ | |
344 | if (!dev->active) | |
f4490002 | 345 | pnp_init_resources(dev); |
1da177e4 | 346 | |
d8254e0e DT |
347 | error = pnp_add_device(dev); |
348 | if (error) { | |
349 | put_device(&dev->dev); | |
350 | return error; | |
351 | } | |
352 | ||
1da177e4 LT |
353 | pnpbios_interface_attach_device(node); |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static void __init build_devlist(void) | |
359 | { | |
360 | u8 nodenum; | |
361 | unsigned int nodes_got = 0; | |
362 | unsigned int devs = 0; | |
363 | struct pnp_bios_node *node; | |
1da177e4 | 364 | |
cd861280 | 365 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
366 | if (!node) |
367 | return; | |
368 | ||
9dd78466 | 369 | for (nodenum = 0; nodenum < 0xff;) { |
1da177e4 LT |
370 | u8 thisnodenum = nodenum; |
371 | /* eventually we will want to use PNPMODE_STATIC here but for now | |
372 | * dynamic will help us catch buggy bioses to add to the blacklist. | |
373 | */ | |
374 | if (!pnpbios_dont_use_current_config) { | |
9dd78466 BH |
375 | if (pnp_bios_get_dev_node |
376 | (&nodenum, (char)PNPMODE_DYNAMIC, node)) | |
1da177e4 LT |
377 | break; |
378 | } else { | |
9dd78466 BH |
379 | if (pnp_bios_get_dev_node |
380 | (&nodenum, (char)PNPMODE_STATIC, node)) | |
1da177e4 LT |
381 | break; |
382 | } | |
383 | nodes_got++; | |
36405e96 | 384 | if (insert_device(node) == 0) |
1da177e4 LT |
385 | devs++; |
386 | if (nodenum <= thisnodenum) { | |
9dd78466 BH |
387 | printk(KERN_ERR |
388 | "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", | |
389 | (unsigned int)nodenum, | |
390 | (unsigned int)thisnodenum); | |
1da177e4 LT |
391 | break; |
392 | } | |
393 | } | |
394 | kfree(node); | |
395 | ||
9dd78466 BH |
396 | printk(KERN_INFO |
397 | "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", | |
398 | nodes_got, nodes_got != 1 ? "s" : "", devs); | |
1da177e4 LT |
399 | } |
400 | ||
401 | /* | |
402 | * | |
403 | * INIT AND EXIT | |
404 | * | |
405 | */ | |
406 | ||
07d4e9af BH |
407 | static int pnpbios_disabled; |
408 | int pnpbios_dont_use_current_config; | |
1da177e4 | 409 | |
1da177e4 LT |
410 | static int __init pnpbios_setup(char *str) |
411 | { | |
412 | int invert; | |
413 | ||
414 | while ((str != NULL) && (*str != '\0')) { | |
415 | if (strncmp(str, "off", 3) == 0) | |
9dd78466 | 416 | pnpbios_disabled = 1; |
1da177e4 | 417 | if (strncmp(str, "on", 2) == 0) |
9dd78466 | 418 | pnpbios_disabled = 0; |
1da177e4 LT |
419 | invert = (strncmp(str, "no-", 3) == 0); |
420 | if (invert) | |
421 | str += 3; | |
422 | if (strncmp(str, "curr", 4) == 0) | |
423 | pnpbios_dont_use_current_config = invert; | |
424 | str = strchr(str, ','); | |
425 | if (str != NULL) | |
426 | str += strspn(str, ", \t"); | |
427 | } | |
428 | ||
429 | return 1; | |
430 | } | |
431 | ||
432 | __setup("pnpbios=", pnpbios_setup); | |
1da177e4 LT |
433 | |
434 | /* PnP BIOS signature: "$PnP" */ | |
435 | #define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) | |
436 | ||
437 | static int __init pnpbios_probe_system(void) | |
438 | { | |
439 | union pnp_bios_install_struct *check; | |
440 | u8 sum; | |
441 | int length, i; | |
442 | ||
443 | printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); | |
444 | ||
445 | /* | |
9dd78466 | 446 | * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS |
1da177e4 LT |
447 | * structure and, if one is found, sets up the selectors and |
448 | * entry points | |
449 | */ | |
9dd78466 BH |
450 | for (check = (union pnp_bios_install_struct *)__va(0xf0000); |
451 | check < (union pnp_bios_install_struct *)__va(0xffff0); | |
1da177e4 LT |
452 | check = (void *)check + 16) { |
453 | if (check->fields.signature != PNP_SIGNATURE) | |
454 | continue; | |
9dd78466 BH |
455 | printk(KERN_INFO |
456 | "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", | |
457 | check); | |
1da177e4 LT |
458 | length = check->fields.length; |
459 | if (!length) { | |
9dd78466 BH |
460 | printk(KERN_ERR |
461 | "PnPBIOS: installation structure is invalid, skipping\n"); | |
1da177e4 LT |
462 | continue; |
463 | } | |
464 | for (sum = 0, i = 0; i < length; i++) | |
465 | sum += check->chars[i]; | |
466 | if (sum) { | |
9dd78466 BH |
467 | printk(KERN_ERR |
468 | "PnPBIOS: installation structure is corrupted, skipping\n"); | |
1da177e4 LT |
469 | continue; |
470 | } | |
471 | if (check->fields.version < 0x10) { | |
9dd78466 BH |
472 | printk(KERN_WARNING |
473 | "PnPBIOS: PnP BIOS version %d.%d is not supported\n", | |
1da177e4 LT |
474 | check->fields.version >> 4, |
475 | check->fields.version & 15); | |
476 | continue; | |
477 | } | |
9dd78466 BH |
478 | printk(KERN_INFO |
479 | "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", | |
480 | check->fields.version >> 4, check->fields.version & 15, | |
1da177e4 LT |
481 | check->fields.pm16cseg, check->fields.pm16offset, |
482 | check->fields.pm16dseg); | |
483 | pnp_bios_install = check; | |
484 | return 1; | |
485 | } | |
486 | ||
487 | printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); | |
488 | return 0; | |
489 | } | |
490 | ||
1855256c | 491 | static int __init exploding_pnp_bios(const struct dmi_system_id *d) |
1da177e4 LT |
492 | { |
493 | printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); | |
494 | return 0; | |
495 | } | |
496 | ||
ffbe5523 | 497 | static struct dmi_system_id pnpbios_dmi_table[] __initdata = { |
9dd78466 BH |
498 | { /* PnPBIOS GPF on boot */ |
499 | .callback = exploding_pnp_bios, | |
500 | .ident = "Higraded P14H", | |
501 | .matches = { | |
502 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
503 | DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), | |
506 | }, | |
507 | }, | |
508 | { /* PnPBIOS GPF on boot */ | |
509 | .callback = exploding_pnp_bios, | |
510 | .ident = "ASUS P4P800", | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), | |
513 | DMI_MATCH(DMI_BOARD_NAME, "P4P800"), | |
514 | }, | |
515 | }, | |
516 | {} | |
1da177e4 LT |
517 | }; |
518 | ||
519 | static int __init pnpbios_init(void) | |
520 | { | |
521 | int ret; | |
522 | ||
6020c8f3 | 523 | if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) || |
80dfd83d | 524 | arch_pnpbios_disabled()) { |
1da177e4 LT |
525 | printk(KERN_INFO "PnPBIOS: Disabled\n"); |
526 | return -ENODEV; | |
527 | } | |
80dfd83d | 528 | |
1da177e4 LT |
529 | #ifdef CONFIG_PNPACPI |
530 | if (!acpi_disabled && !pnpacpi_disabled) { | |
531 | pnpbios_disabled = 1; | |
532 | printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); | |
533 | return -ENODEV; | |
534 | } | |
07d4e9af | 535 | #endif /* CONFIG_ACPI */ |
1da177e4 LT |
536 | |
537 | /* scan the system for pnpbios support */ | |
538 | if (!pnpbios_probe_system()) | |
539 | return -ENODEV; | |
540 | ||
541 | /* make preparations for bios calls */ | |
542 | pnpbios_calls_init(pnp_bios_install); | |
543 | ||
544 | /* read the node info */ | |
545 | ret = pnp_bios_dev_node_info(&node_info); | |
546 | if (ret) { | |
9dd78466 BH |
547 | printk(KERN_ERR |
548 | "PnPBIOS: Unable to get node info. Aborting.\n"); | |
1da177e4 LT |
549 | return ret; |
550 | } | |
551 | ||
552 | /* register with the pnp layer */ | |
553 | ret = pnp_register_protocol(&pnpbios_protocol); | |
554 | if (ret) { | |
9dd78466 BH |
555 | printk(KERN_ERR |
556 | "PnPBIOS: Unable to register driver. Aborting.\n"); | |
1da177e4 LT |
557 | return ret; |
558 | } | |
559 | ||
560 | /* start the proc interface */ | |
561 | ret = pnpbios_proc_init(); | |
562 | if (ret) | |
563 | printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); | |
564 | ||
565 | /* scan for pnpbios devices */ | |
566 | build_devlist(); | |
567 | ||
8f81dd14 | 568 | pnp_platform_devices = 1; |
1da177e4 LT |
569 | return 0; |
570 | } | |
571 | ||
ed458df4 | 572 | fs_initcall(pnpbios_init); |
1da177e4 LT |
573 | |
574 | static int __init pnpbios_thread_init(void) | |
575 | { | |
38de2790 | 576 | struct task_struct *task; |
933ee711 | 577 | |
1da177e4 LT |
578 | if (pnpbios_disabled) |
579 | return 0; | |
38de2790 BP |
580 | |
581 | init_completion(&unload_sem); | |
582 | task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd"); | |
583 | if (IS_ERR(task)) | |
584 | return PTR_ERR(task); | |
585 | ||
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
1da177e4 LT |
589 | /* Start the kernel thread later: */ |
590 | module_init(pnpbios_thread_init); | |
591 | ||
1da177e4 | 592 | EXPORT_SYMBOL(pnpbios_protocol); |