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> | |
53 | #include <linux/pnpbios.h> | |
54 | #include <linux/device.h> | |
55 | #include <linux/pnp.h> | |
56 | #include <linux/mm.h> | |
57 | #include <linux/smp.h> | |
58 | #include <linux/slab.h> | |
1da177e4 LT |
59 | #include <linux/completion.h> |
60 | #include <linux/spinlock.h> | |
61 | #include <linux/dmi.h> | |
62 | #include <linux/delay.h> | |
63 | #include <linux/acpi.h> | |
7dfb7103 | 64 | #include <linux/freezer.h> |
db9c02fa | 65 | #include <linux/kthread.h> |
1da177e4 LT |
66 | |
67 | #include <asm/page.h> | |
68 | #include <asm/desc.h> | |
69 | #include <asm/system.h> | |
70 | #include <asm/byteorder.h> | |
71 | ||
72 | #include "pnpbios.h" | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * | |
76 | * PnP BIOS INTERFACE | |
77 | * | |
78 | */ | |
79 | ||
9dd78466 | 80 | static union pnp_bios_install_struct *pnp_bios_install = NULL; |
1da177e4 LT |
81 | |
82 | int pnp_bios_present(void) | |
83 | { | |
84 | return (pnp_bios_install != NULL); | |
85 | } | |
86 | ||
87 | struct pnp_dev_node_info node_info; | |
88 | ||
1da177e4 LT |
89 | /* |
90 | * | |
91 | * DOCKING FUNCTIONS | |
92 | * | |
93 | */ | |
94 | ||
95 | #ifdef CONFIG_HOTPLUG | |
96 | ||
97 | static int unloading = 0; | |
98 | static struct completion unload_sem; | |
99 | ||
100 | /* | |
101 | * (Much of this belongs in a shared routine somewhere) | |
102 | */ | |
9dd78466 | 103 | |
1da177e4 LT |
104 | static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) |
105 | { | |
9dd78466 | 106 | char *argv[3], **envp, *buf, *scratch; |
1da177e4 LT |
107 | int i = 0, value; |
108 | ||
1da177e4 LT |
109 | if (!current->fs->root) { |
110 | return -EAGAIN; | |
111 | } | |
9dd78466 | 112 | if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL))) { |
1da177e4 LT |
113 | return -ENOMEM; |
114 | } | |
cd861280 | 115 | if (!(buf = kzalloc(256, GFP_KERNEL))) { |
9dd78466 | 116 | kfree(envp); |
1da177e4 LT |
117 | return -ENOMEM; |
118 | } | |
119 | ||
03438211 KS |
120 | /* FIXME: if there are actual users of this, it should be integrated into |
121 | * the driver core and use the usual infrastructure like sysfs and uevents */ | |
9dd78466 BH |
122 | argv[0] = "/sbin/pnpbios"; |
123 | argv[1] = "dock"; | |
124 | argv[2] = NULL; | |
1da177e4 LT |
125 | |
126 | /* minimal command environment */ | |
9dd78466 BH |
127 | envp[i++] = "HOME=/"; |
128 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
1da177e4 LT |
129 | |
130 | #ifdef DEBUG | |
131 | /* hint that policy agent should enter no-stdout debug mode */ | |
9dd78466 | 132 | envp[i++] = "DEBUG=kernel"; |
1da177e4 LT |
133 | #endif |
134 | /* extensible set of named bus-specific parameters, | |
135 | * supporting multiple driver selection algorithms. | |
136 | */ | |
137 | scratch = buf; | |
138 | ||
139 | /* action: add, remove */ | |
9dd78466 BH |
140 | envp[i++] = scratch; |
141 | scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1; | |
1da177e4 LT |
142 | |
143 | /* Report the ident for the dock */ | |
9dd78466 BH |
144 | envp[i++] = scratch; |
145 | scratch += sprintf(scratch, "DOCK=%x/%x/%x", | |
146 | info->location_id, info->serial, info->capabilities); | |
1da177e4 | 147 | envp[i] = NULL; |
9dd78466 BH |
148 | |
149 | value = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC); | |
150 | kfree(buf); | |
151 | kfree(envp); | |
1da177e4 LT |
152 | return 0; |
153 | } | |
154 | ||
155 | /* | |
156 | * Poll the PnP docking at regular intervals | |
157 | */ | |
9dd78466 | 158 | static int pnp_dock_thread(void *unused) |
1da177e4 LT |
159 | { |
160 | static struct pnp_docking_station_info now; | |
161 | int docked = -1, d = 0; | |
83144186 | 162 | set_freezable(); |
9dd78466 | 163 | while (!unloading) { |
1da177e4 | 164 | int status; |
9dd78466 | 165 | |
1da177e4 LT |
166 | /* |
167 | * Poll every 2 seconds | |
168 | */ | |
169 | msleep_interruptible(2000); | |
170 | ||
db9c02fa EB |
171 | if (try_to_freeze()) |
172 | continue; | |
1da177e4 LT |
173 | |
174 | status = pnp_bios_dock_station_info(&now); | |
175 | ||
9dd78466 | 176 | switch (status) { |
1da177e4 LT |
177 | /* |
178 | * No dock to manage | |
179 | */ | |
9dd78466 BH |
180 | case PNP_FUNCTION_NOT_SUPPORTED: |
181 | complete_and_exit(&unload_sem, 0); | |
182 | case PNP_SYSTEM_NOT_DOCKED: | |
183 | d = 0; | |
184 | break; | |
185 | case PNP_SUCCESS: | |
186 | d = 1; | |
187 | break; | |
188 | default: | |
189 | pnpbios_print_status("pnp_dock_thread", status); | |
190 | continue; | |
1da177e4 | 191 | } |
9dd78466 BH |
192 | if (d != docked) { |
193 | if (pnp_dock_event(d, &now) == 0) { | |
1da177e4 LT |
194 | docked = d; |
195 | #if 0 | |
9dd78466 BH |
196 | printk(KERN_INFO |
197 | "PnPBIOS: Docking station %stached\n", | |
198 | docked ? "at" : "de"); | |
1da177e4 LT |
199 | #endif |
200 | } | |
201 | } | |
202 | } | |
203 | complete_and_exit(&unload_sem, 0); | |
204 | } | |
205 | ||
9dd78466 | 206 | #endif /* CONFIG_HOTPLUG */ |
1da177e4 | 207 | |
9dd78466 BH |
208 | static int pnpbios_get_resources(struct pnp_dev *dev, |
209 | struct pnp_resource_table *res) | |
1da177e4 LT |
210 | { |
211 | u8 nodenum = dev->number; | |
9dd78466 | 212 | struct pnp_bios_node *node; |
1da177e4 LT |
213 | |
214 | /* just in case */ | |
9dd78466 | 215 | if (!pnpbios_is_dynamic(dev)) |
1da177e4 LT |
216 | return -EPERM; |
217 | ||
cd861280 | 218 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
219 | if (!node) |
220 | return -1; | |
9dd78466 | 221 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
222 | kfree(node); |
223 | return -ENODEV; | |
224 | } | |
225 | pnpbios_read_resources_from_node(res, node); | |
226 | dev->active = pnp_is_active(dev); | |
227 | kfree(node); | |
228 | return 0; | |
229 | } | |
230 | ||
9dd78466 BH |
231 | static int pnpbios_set_resources(struct pnp_dev *dev, |
232 | struct pnp_resource_table *res) | |
1da177e4 LT |
233 | { |
234 | u8 nodenum = dev->number; | |
9dd78466 | 235 | struct pnp_bios_node *node; |
1da177e4 LT |
236 | int ret; |
237 | ||
238 | /* just in case */ | |
239 | if (!pnpbios_is_dynamic(dev)) | |
240 | return -EPERM; | |
241 | ||
cd861280 | 242 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
243 | if (!node) |
244 | return -1; | |
9dd78466 | 245 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
246 | kfree(node); |
247 | return -ENODEV; | |
248 | } | |
9dd78466 | 249 | if (pnpbios_write_resources_to_node(res, node) < 0) { |
1da177e4 LT |
250 | kfree(node); |
251 | return -1; | |
252 | } | |
253 | ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); | |
254 | kfree(node); | |
255 | if (ret > 0) | |
256 | ret = -1; | |
257 | return ret; | |
258 | } | |
259 | ||
9dd78466 | 260 | static void pnpbios_zero_data_stream(struct pnp_bios_node *node) |
1da177e4 | 261 | { |
9dd78466 BH |
262 | unsigned char *p = (char *)node->data; |
263 | unsigned char *end = (char *)(node->data + node->size); | |
1da177e4 LT |
264 | unsigned int len; |
265 | int i; | |
266 | while ((char *)p < (char *)end) { | |
9dd78466 | 267 | if (p[0] & 0x80) { /* large tag */ |
1da177e4 LT |
268 | len = (p[2] << 8) | p[1]; |
269 | p += 3; | |
270 | } else { | |
9dd78466 | 271 | if (((p[0] >> 3) & 0x0f) == 0x0f) |
1da177e4 LT |
272 | return; |
273 | len = p[0] & 0x07; | |
274 | p += 1; | |
275 | } | |
276 | for (i = 0; i < len; i++) | |
277 | p[i] = 0; | |
278 | p += len; | |
279 | } | |
9dd78466 BH |
280 | printk(KERN_ERR |
281 | "PnPBIOS: Resource structure did not contain an end tag.\n"); | |
1da177e4 LT |
282 | } |
283 | ||
284 | static int pnpbios_disable_resources(struct pnp_dev *dev) | |
285 | { | |
9dd78466 | 286 | struct pnp_bios_node *node; |
1da177e4 LT |
287 | u8 nodenum = dev->number; |
288 | int ret; | |
289 | ||
290 | /* just in case */ | |
9dd78466 | 291 | if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) |
1da177e4 LT |
292 | return -EPERM; |
293 | ||
cd861280 | 294 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
295 | if (!node) |
296 | return -ENOMEM; | |
297 | ||
9dd78466 | 298 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
299 | kfree(node); |
300 | return -ENODEV; | |
301 | } | |
302 | pnpbios_zero_data_stream(node); | |
303 | ||
304 | ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); | |
305 | kfree(node); | |
306 | if (ret > 0) | |
307 | ret = -1; | |
308 | return ret; | |
309 | } | |
310 | ||
311 | /* PnP Layer support */ | |
312 | ||
313 | struct pnp_protocol pnpbios_protocol = { | |
9dd78466 BH |
314 | .name = "Plug and Play BIOS", |
315 | .get = pnpbios_get_resources, | |
316 | .set = pnpbios_set_resources, | |
1da177e4 LT |
317 | .disable = pnpbios_disable_resources, |
318 | }; | |
319 | ||
9dd78466 | 320 | static int insert_device(struct pnp_dev *dev, struct pnp_bios_node *node) |
1da177e4 | 321 | { |
9dd78466 BH |
322 | struct list_head *pos; |
323 | struct pnp_dev *pnp_dev; | |
1da177e4 LT |
324 | struct pnp_id *dev_id; |
325 | char id[8]; | |
326 | ||
327 | /* check if the device is already added */ | |
328 | dev->number = node->handle; | |
9dd78466 | 329 | list_for_each(pos, &pnpbios_protocol.devices) { |
1da177e4 LT |
330 | pnp_dev = list_entry(pos, struct pnp_dev, protocol_list); |
331 | if (dev->number == pnp_dev->number) | |
332 | return -1; | |
333 | } | |
334 | ||
335 | /* set the initial values for the PnP device */ | |
cd861280 | 336 | dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
1da177e4 LT |
337 | if (!dev_id) |
338 | return -1; | |
9dd78466 BH |
339 | pnpid32_to_pnpid(node->eisa_id, id); |
340 | memcpy(dev_id->id, id, 7); | |
1da177e4 LT |
341 | pnp_add_id(dev_id, dev); |
342 | pnpbios_parse_data_stream(dev, node); | |
343 | dev->active = pnp_is_active(dev); | |
344 | dev->flags = node->flags; | |
345 | if (!(dev->flags & PNPBIOS_NO_CONFIG)) | |
346 | dev->capabilities |= PNP_CONFIGURABLE; | |
3ae19208 | 347 | if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev)) |
1da177e4 LT |
348 | dev->capabilities |= PNP_DISABLE; |
349 | dev->capabilities |= PNP_READ; | |
350 | if (pnpbios_is_dynamic(dev)) | |
351 | dev->capabilities |= PNP_WRITE; | |
352 | if (dev->flags & PNPBIOS_REMOVABLE) | |
353 | dev->capabilities |= PNP_REMOVABLE; | |
354 | dev->protocol = &pnpbios_protocol; | |
355 | ||
356 | /* clear out the damaged flags */ | |
357 | if (!dev->active) | |
358 | pnp_init_resource_table(&dev->res); | |
359 | ||
360 | pnp_add_device(dev); | |
361 | pnpbios_interface_attach_device(node); | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | static void __init build_devlist(void) | |
367 | { | |
368 | u8 nodenum; | |
369 | unsigned int nodes_got = 0; | |
370 | unsigned int devs = 0; | |
371 | struct pnp_bios_node *node; | |
372 | struct pnp_dev *dev; | |
373 | ||
cd861280 | 374 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
375 | if (!node) |
376 | return; | |
377 | ||
9dd78466 | 378 | for (nodenum = 0; nodenum < 0xff;) { |
1da177e4 LT |
379 | u8 thisnodenum = nodenum; |
380 | /* eventually we will want to use PNPMODE_STATIC here but for now | |
381 | * dynamic will help us catch buggy bioses to add to the blacklist. | |
382 | */ | |
383 | if (!pnpbios_dont_use_current_config) { | |
9dd78466 BH |
384 | if (pnp_bios_get_dev_node |
385 | (&nodenum, (char)PNPMODE_DYNAMIC, node)) | |
1da177e4 LT |
386 | break; |
387 | } else { | |
9dd78466 BH |
388 | if (pnp_bios_get_dev_node |
389 | (&nodenum, (char)PNPMODE_STATIC, node)) | |
1da177e4 LT |
390 | break; |
391 | } | |
392 | nodes_got++; | |
9dd78466 | 393 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
1da177e4 LT |
394 | if (!dev) |
395 | break; | |
9dd78466 | 396 | if (insert_device(dev, node) < 0) |
1da177e4 LT |
397 | kfree(dev); |
398 | else | |
399 | devs++; | |
400 | if (nodenum <= thisnodenum) { | |
9dd78466 BH |
401 | printk(KERN_ERR |
402 | "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", | |
403 | (unsigned int)nodenum, | |
404 | (unsigned int)thisnodenum); | |
1da177e4 LT |
405 | break; |
406 | } | |
407 | } | |
408 | kfree(node); | |
409 | ||
9dd78466 BH |
410 | printk(KERN_INFO |
411 | "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", | |
412 | nodes_got, nodes_got != 1 ? "s" : "", devs); | |
1da177e4 LT |
413 | } |
414 | ||
415 | /* | |
416 | * | |
417 | * INIT AND EXIT | |
418 | * | |
419 | */ | |
420 | ||
9dd78466 BH |
421 | static int pnpbios_disabled; /* = 0 */ |
422 | int pnpbios_dont_use_current_config; /* = 0 */ | |
1da177e4 LT |
423 | |
424 | #ifndef MODULE | |
425 | static int __init pnpbios_setup(char *str) | |
426 | { | |
427 | int invert; | |
428 | ||
429 | while ((str != NULL) && (*str != '\0')) { | |
430 | if (strncmp(str, "off", 3) == 0) | |
9dd78466 | 431 | pnpbios_disabled = 1; |
1da177e4 | 432 | if (strncmp(str, "on", 2) == 0) |
9dd78466 | 433 | pnpbios_disabled = 0; |
1da177e4 LT |
434 | invert = (strncmp(str, "no-", 3) == 0); |
435 | if (invert) | |
436 | str += 3; | |
437 | if (strncmp(str, "curr", 4) == 0) | |
438 | pnpbios_dont_use_current_config = invert; | |
439 | str = strchr(str, ','); | |
440 | if (str != NULL) | |
441 | str += strspn(str, ", \t"); | |
442 | } | |
443 | ||
444 | return 1; | |
445 | } | |
446 | ||
447 | __setup("pnpbios=", pnpbios_setup); | |
448 | #endif | |
449 | ||
450 | /* PnP BIOS signature: "$PnP" */ | |
451 | #define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) | |
452 | ||
453 | static int __init pnpbios_probe_system(void) | |
454 | { | |
455 | union pnp_bios_install_struct *check; | |
456 | u8 sum; | |
457 | int length, i; | |
458 | ||
459 | printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); | |
460 | ||
461 | /* | |
9dd78466 | 462 | * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS |
1da177e4 LT |
463 | * structure and, if one is found, sets up the selectors and |
464 | * entry points | |
465 | */ | |
9dd78466 BH |
466 | for (check = (union pnp_bios_install_struct *)__va(0xf0000); |
467 | check < (union pnp_bios_install_struct *)__va(0xffff0); | |
1da177e4 LT |
468 | check = (void *)check + 16) { |
469 | if (check->fields.signature != PNP_SIGNATURE) | |
470 | continue; | |
9dd78466 BH |
471 | printk(KERN_INFO |
472 | "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", | |
473 | check); | |
1da177e4 LT |
474 | length = check->fields.length; |
475 | if (!length) { | |
9dd78466 BH |
476 | printk(KERN_ERR |
477 | "PnPBIOS: installation structure is invalid, skipping\n"); | |
1da177e4 LT |
478 | continue; |
479 | } | |
480 | for (sum = 0, i = 0; i < length; i++) | |
481 | sum += check->chars[i]; | |
482 | if (sum) { | |
9dd78466 BH |
483 | printk(KERN_ERR |
484 | "PnPBIOS: installation structure is corrupted, skipping\n"); | |
1da177e4 LT |
485 | continue; |
486 | } | |
487 | if (check->fields.version < 0x10) { | |
9dd78466 BH |
488 | printk(KERN_WARNING |
489 | "PnPBIOS: PnP BIOS version %d.%d is not supported\n", | |
1da177e4 LT |
490 | check->fields.version >> 4, |
491 | check->fields.version & 15); | |
492 | continue; | |
493 | } | |
9dd78466 BH |
494 | printk(KERN_INFO |
495 | "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", | |
496 | check->fields.version >> 4, check->fields.version & 15, | |
1da177e4 LT |
497 | check->fields.pm16cseg, check->fields.pm16offset, |
498 | check->fields.pm16dseg); | |
499 | pnp_bios_install = check; | |
500 | return 1; | |
501 | } | |
502 | ||
503 | printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static int __init exploding_pnp_bios(struct dmi_system_id *d) | |
508 | { | |
509 | printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); | |
510 | return 0; | |
511 | } | |
512 | ||
ffbe5523 | 513 | static struct dmi_system_id pnpbios_dmi_table[] __initdata = { |
9dd78466 BH |
514 | { /* PnPBIOS GPF on boot */ |
515 | .callback = exploding_pnp_bios, | |
516 | .ident = "Higraded P14H", | |
517 | .matches = { | |
518 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
519 | DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), | |
520 | DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), | |
521 | DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), | |
522 | }, | |
523 | }, | |
524 | { /* PnPBIOS GPF on boot */ | |
525 | .callback = exploding_pnp_bios, | |
526 | .ident = "ASUS P4P800", | |
527 | .matches = { | |
528 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), | |
529 | DMI_MATCH(DMI_BOARD_NAME, "P4P800"), | |
530 | }, | |
531 | }, | |
532 | {} | |
1da177e4 LT |
533 | }; |
534 | ||
535 | static int __init pnpbios_init(void) | |
536 | { | |
537 | int ret; | |
538 | ||
30cbc222 OH |
539 | #if defined(CONFIG_PPC_MERGE) |
540 | if (check_legacy_ioport(PNPBIOS_BASE)) | |
541 | return -ENODEV; | |
542 | #endif | |
6020c8f3 RR |
543 | if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) || |
544 | paravirt_enabled()) { | |
1da177e4 LT |
545 | printk(KERN_INFO "PnPBIOS: Disabled\n"); |
546 | return -ENODEV; | |
547 | } | |
1da177e4 LT |
548 | #ifdef CONFIG_PNPACPI |
549 | if (!acpi_disabled && !pnpacpi_disabled) { | |
550 | pnpbios_disabled = 1; | |
551 | printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); | |
552 | return -ENODEV; | |
553 | } | |
554 | #endif /* CONFIG_ACPI */ | |
555 | ||
556 | /* scan the system for pnpbios support */ | |
557 | if (!pnpbios_probe_system()) | |
558 | return -ENODEV; | |
559 | ||
560 | /* make preparations for bios calls */ | |
561 | pnpbios_calls_init(pnp_bios_install); | |
562 | ||
563 | /* read the node info */ | |
564 | ret = pnp_bios_dev_node_info(&node_info); | |
565 | if (ret) { | |
9dd78466 BH |
566 | printk(KERN_ERR |
567 | "PnPBIOS: Unable to get node info. Aborting.\n"); | |
1da177e4 LT |
568 | return ret; |
569 | } | |
570 | ||
571 | /* register with the pnp layer */ | |
572 | ret = pnp_register_protocol(&pnpbios_protocol); | |
573 | if (ret) { | |
9dd78466 BH |
574 | printk(KERN_ERR |
575 | "PnPBIOS: Unable to register driver. Aborting.\n"); | |
1da177e4 LT |
576 | return ret; |
577 | } | |
578 | ||
579 | /* start the proc interface */ | |
580 | ret = pnpbios_proc_init(); | |
581 | if (ret) | |
582 | printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); | |
583 | ||
584 | /* scan for pnpbios devices */ | |
585 | build_devlist(); | |
586 | ||
8f81dd14 | 587 | pnp_platform_devices = 1; |
1da177e4 LT |
588 | return 0; |
589 | } | |
590 | ||
591 | subsys_initcall(pnpbios_init); | |
592 | ||
593 | static int __init pnpbios_thread_init(void) | |
594 | { | |
db9c02fa | 595 | struct task_struct *task; |
30cbc222 OH |
596 | #if defined(CONFIG_PPC_MERGE) |
597 | if (check_legacy_ioport(PNPBIOS_BASE)) | |
598 | return 0; | |
599 | #endif | |
1da177e4 LT |
600 | if (pnpbios_disabled) |
601 | return 0; | |
602 | #ifdef CONFIG_HOTPLUG | |
603 | init_completion(&unload_sem); | |
db9c02fa EB |
604 | task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd"); |
605 | if (!IS_ERR(task)) | |
1da177e4 LT |
606 | unloading = 0; |
607 | #endif | |
608 | return 0; | |
609 | } | |
610 | ||
611 | #ifndef MODULE | |
612 | ||
613 | /* init/main.c calls pnpbios_init early */ | |
614 | ||
615 | /* Start the kernel thread later: */ | |
616 | module_init(pnpbios_thread_init); | |
617 | ||
618 | #else | |
619 | ||
620 | /* | |
621 | * N.B.: Building pnpbios as a module hasn't been fully implemented | |
622 | */ | |
623 | ||
624 | MODULE_LICENSE("GPL"); | |
625 | ||
626 | static int __init pnpbios_init_all(void) | |
627 | { | |
628 | int r; | |
629 | ||
630 | r = pnpbios_init(); | |
631 | if (r) | |
632 | return r; | |
633 | r = pnpbios_thread_init(); | |
634 | if (r) | |
635 | return r; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static void __exit pnpbios_exit(void) | |
640 | { | |
641 | #ifdef CONFIG_HOTPLUG | |
642 | unloading = 1; | |
643 | wait_for_completion(&unload_sem); | |
644 | #endif | |
645 | pnpbios_proc_exit(); | |
646 | /* We ought to free resources here */ | |
647 | return; | |
648 | } | |
649 | ||
650 | module_init(pnpbios_init_all); | |
651 | module_exit(pnpbios_exit); | |
652 | ||
653 | #endif | |
654 | ||
655 | EXPORT_SYMBOL(pnpbios_protocol); |