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Commit | Line | Data |
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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 | */ | |
1da177e4 LT |
103 | static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) |
104 | { | |
9dd78466 | 105 | char *argv[3], **envp, *buf, *scratch; |
1da177e4 LT |
106 | int i = 0, value; |
107 | ||
07d4e9af | 108 | if (!current->fs->root) |
1da177e4 | 109 | return -EAGAIN; |
07d4e9af | 110 | if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL))) |
1da177e4 | 111 | return -ENOMEM; |
cd861280 | 112 | if (!(buf = kzalloc(256, GFP_KERNEL))) { |
9dd78466 | 113 | kfree(envp); |
1da177e4 LT |
114 | return -ENOMEM; |
115 | } | |
116 | ||
07d4e9af BH |
117 | /* FIXME: if there are actual users of this, it should be |
118 | * integrated into the driver core and use the usual infrastructure | |
119 | * like sysfs and uevents | |
120 | */ | |
9dd78466 BH |
121 | argv[0] = "/sbin/pnpbios"; |
122 | argv[1] = "dock"; | |
123 | argv[2] = NULL; | |
1da177e4 LT |
124 | |
125 | /* minimal command environment */ | |
9dd78466 BH |
126 | envp[i++] = "HOME=/"; |
127 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
1da177e4 LT |
128 | |
129 | #ifdef DEBUG | |
130 | /* hint that policy agent should enter no-stdout debug mode */ | |
9dd78466 | 131 | envp[i++] = "DEBUG=kernel"; |
1da177e4 LT |
132 | #endif |
133 | /* extensible set of named bus-specific parameters, | |
134 | * supporting multiple driver selection algorithms. | |
135 | */ | |
136 | scratch = buf; | |
137 | ||
138 | /* action: add, remove */ | |
9dd78466 BH |
139 | envp[i++] = scratch; |
140 | scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1; | |
1da177e4 LT |
141 | |
142 | /* Report the ident for the dock */ | |
9dd78466 BH |
143 | envp[i++] = scratch; |
144 | scratch += sprintf(scratch, "DOCK=%x/%x/%x", | |
145 | info->location_id, info->serial, info->capabilities); | |
1da177e4 | 146 | envp[i] = NULL; |
9dd78466 | 147 | |
07d4e9af | 148 | value = call_usermodehelper(argv [0], argv, envp, UMH_WAIT_EXEC); |
9dd78466 BH |
149 | kfree(buf); |
150 | kfree(envp); | |
1da177e4 LT |
151 | return 0; |
152 | } | |
153 | ||
154 | /* | |
155 | * Poll the PnP docking at regular intervals | |
156 | */ | |
9dd78466 | 157 | static int pnp_dock_thread(void *unused) |
1da177e4 LT |
158 | { |
159 | static struct pnp_docking_station_info now; | |
160 | int docked = -1, d = 0; | |
07d4e9af | 161 | |
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 | ||
07d4e9af | 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 | 213 | |
9dd78466 | 214 | if (!pnpbios_is_dynamic(dev)) |
1da177e4 LT |
215 | return -EPERM; |
216 | ||
cd861280 | 217 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
218 | if (!node) |
219 | return -1; | |
9dd78466 | 220 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
221 | kfree(node); |
222 | return -ENODEV; | |
223 | } | |
224 | pnpbios_read_resources_from_node(res, node); | |
225 | dev->active = pnp_is_active(dev); | |
226 | kfree(node); | |
227 | return 0; | |
228 | } | |
229 | ||
9dd78466 BH |
230 | static int pnpbios_set_resources(struct pnp_dev *dev, |
231 | struct pnp_resource_table *res) | |
1da177e4 LT |
232 | { |
233 | u8 nodenum = dev->number; | |
9dd78466 | 234 | struct pnp_bios_node *node; |
1da177e4 LT |
235 | int ret; |
236 | ||
1da177e4 LT |
237 | if (!pnpbios_is_dynamic(dev)) |
238 | return -EPERM; | |
239 | ||
cd861280 | 240 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
241 | if (!node) |
242 | return -1; | |
9dd78466 | 243 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
244 | kfree(node); |
245 | return -ENODEV; | |
246 | } | |
9dd78466 | 247 | if (pnpbios_write_resources_to_node(res, node) < 0) { |
1da177e4 LT |
248 | kfree(node); |
249 | return -1; | |
250 | } | |
251 | ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); | |
252 | kfree(node); | |
253 | if (ret > 0) | |
254 | ret = -1; | |
255 | return ret; | |
256 | } | |
257 | ||
9dd78466 | 258 | static void pnpbios_zero_data_stream(struct pnp_bios_node *node) |
1da177e4 | 259 | { |
9dd78466 BH |
260 | unsigned char *p = (char *)node->data; |
261 | unsigned char *end = (char *)(node->data + node->size); | |
1da177e4 LT |
262 | unsigned int len; |
263 | int i; | |
07d4e9af | 264 | |
1da177e4 | 265 | while ((char *)p < (char *)end) { |
9dd78466 | 266 | if (p[0] & 0x80) { /* large tag */ |
1da177e4 LT |
267 | len = (p[2] << 8) | p[1]; |
268 | p += 3; | |
269 | } else { | |
9dd78466 | 270 | if (((p[0] >> 3) & 0x0f) == 0x0f) |
1da177e4 LT |
271 | return; |
272 | len = p[0] & 0x07; | |
273 | p += 1; | |
274 | } | |
275 | for (i = 0; i < len; i++) | |
276 | p[i] = 0; | |
277 | p += len; | |
278 | } | |
9dd78466 BH |
279 | printk(KERN_ERR |
280 | "PnPBIOS: Resource structure did not contain an end tag.\n"); | |
1da177e4 LT |
281 | } |
282 | ||
283 | static int pnpbios_disable_resources(struct pnp_dev *dev) | |
284 | { | |
9dd78466 | 285 | struct pnp_bios_node *node; |
1da177e4 LT |
286 | u8 nodenum = dev->number; |
287 | int ret; | |
288 | ||
9dd78466 | 289 | if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) |
1da177e4 LT |
290 | return -EPERM; |
291 | ||
cd861280 | 292 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
293 | if (!node) |
294 | return -ENOMEM; | |
295 | ||
9dd78466 | 296 | if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) { |
1da177e4 LT |
297 | kfree(node); |
298 | return -ENODEV; | |
299 | } | |
300 | pnpbios_zero_data_stream(node); | |
301 | ||
302 | ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); | |
303 | kfree(node); | |
304 | if (ret > 0) | |
305 | ret = -1; | |
306 | return ret; | |
307 | } | |
308 | ||
309 | /* PnP Layer support */ | |
310 | ||
311 | struct pnp_protocol pnpbios_protocol = { | |
9dd78466 BH |
312 | .name = "Plug and Play BIOS", |
313 | .get = pnpbios_get_resources, | |
314 | .set = pnpbios_set_resources, | |
1da177e4 LT |
315 | .disable = pnpbios_disable_resources, |
316 | }; | |
317 | ||
9dd78466 | 318 | static int insert_device(struct pnp_dev *dev, struct pnp_bios_node *node) |
1da177e4 | 319 | { |
9dd78466 BH |
320 | struct list_head *pos; |
321 | struct pnp_dev *pnp_dev; | |
1da177e4 LT |
322 | struct pnp_id *dev_id; |
323 | char id[8]; | |
324 | ||
325 | /* check if the device is already added */ | |
326 | dev->number = node->handle; | |
9dd78466 | 327 | list_for_each(pos, &pnpbios_protocol.devices) { |
1da177e4 LT |
328 | pnp_dev = list_entry(pos, struct pnp_dev, protocol_list); |
329 | if (dev->number == pnp_dev->number) | |
330 | return -1; | |
331 | } | |
332 | ||
333 | /* set the initial values for the PnP device */ | |
cd861280 | 334 | dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
1da177e4 LT |
335 | if (!dev_id) |
336 | return -1; | |
9dd78466 BH |
337 | pnpid32_to_pnpid(node->eisa_id, id); |
338 | memcpy(dev_id->id, id, 7); | |
1da177e4 LT |
339 | pnp_add_id(dev_id, dev); |
340 | pnpbios_parse_data_stream(dev, node); | |
341 | dev->active = pnp_is_active(dev); | |
342 | dev->flags = node->flags; | |
343 | if (!(dev->flags & PNPBIOS_NO_CONFIG)) | |
344 | dev->capabilities |= PNP_CONFIGURABLE; | |
3ae19208 | 345 | if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev)) |
1da177e4 LT |
346 | dev->capabilities |= PNP_DISABLE; |
347 | dev->capabilities |= PNP_READ; | |
348 | if (pnpbios_is_dynamic(dev)) | |
349 | dev->capabilities |= PNP_WRITE; | |
350 | if (dev->flags & PNPBIOS_REMOVABLE) | |
351 | dev->capabilities |= PNP_REMOVABLE; | |
352 | dev->protocol = &pnpbios_protocol; | |
353 | ||
354 | /* clear out the damaged flags */ | |
355 | if (!dev->active) | |
356 | pnp_init_resource_table(&dev->res); | |
357 | ||
358 | pnp_add_device(dev); | |
359 | pnpbios_interface_attach_device(node); | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static void __init build_devlist(void) | |
365 | { | |
366 | u8 nodenum; | |
367 | unsigned int nodes_got = 0; | |
368 | unsigned int devs = 0; | |
369 | struct pnp_bios_node *node; | |
370 | struct pnp_dev *dev; | |
371 | ||
cd861280 | 372 | node = kzalloc(node_info.max_node_size, GFP_KERNEL); |
1da177e4 LT |
373 | if (!node) |
374 | return; | |
375 | ||
9dd78466 | 376 | for (nodenum = 0; nodenum < 0xff;) { |
1da177e4 LT |
377 | u8 thisnodenum = nodenum; |
378 | /* eventually we will want to use PNPMODE_STATIC here but for now | |
379 | * dynamic will help us catch buggy bioses to add to the blacklist. | |
380 | */ | |
381 | if (!pnpbios_dont_use_current_config) { | |
9dd78466 BH |
382 | if (pnp_bios_get_dev_node |
383 | (&nodenum, (char)PNPMODE_DYNAMIC, node)) | |
1da177e4 LT |
384 | break; |
385 | } else { | |
9dd78466 BH |
386 | if (pnp_bios_get_dev_node |
387 | (&nodenum, (char)PNPMODE_STATIC, node)) | |
1da177e4 LT |
388 | break; |
389 | } | |
390 | nodes_got++; | |
9dd78466 | 391 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
1da177e4 LT |
392 | if (!dev) |
393 | break; | |
9dd78466 | 394 | if (insert_device(dev, node) < 0) |
1da177e4 LT |
395 | kfree(dev); |
396 | else | |
397 | devs++; | |
398 | if (nodenum <= thisnodenum) { | |
9dd78466 BH |
399 | printk(KERN_ERR |
400 | "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", | |
401 | (unsigned int)nodenum, | |
402 | (unsigned int)thisnodenum); | |
1da177e4 LT |
403 | break; |
404 | } | |
405 | } | |
406 | kfree(node); | |
407 | ||
9dd78466 BH |
408 | printk(KERN_INFO |
409 | "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", | |
410 | nodes_got, nodes_got != 1 ? "s" : "", devs); | |
1da177e4 LT |
411 | } |
412 | ||
413 | /* | |
414 | * | |
415 | * INIT AND EXIT | |
416 | * | |
417 | */ | |
418 | ||
07d4e9af BH |
419 | static int pnpbios_disabled; |
420 | int pnpbios_dont_use_current_config; | |
1da177e4 LT |
421 | |
422 | #ifndef MODULE | |
423 | static int __init pnpbios_setup(char *str) | |
424 | { | |
425 | int invert; | |
426 | ||
427 | while ((str != NULL) && (*str != '\0')) { | |
428 | if (strncmp(str, "off", 3) == 0) | |
9dd78466 | 429 | pnpbios_disabled = 1; |
1da177e4 | 430 | if (strncmp(str, "on", 2) == 0) |
9dd78466 | 431 | pnpbios_disabled = 0; |
1da177e4 LT |
432 | invert = (strncmp(str, "no-", 3) == 0); |
433 | if (invert) | |
434 | str += 3; | |
435 | if (strncmp(str, "curr", 4) == 0) | |
436 | pnpbios_dont_use_current_config = invert; | |
437 | str = strchr(str, ','); | |
438 | if (str != NULL) | |
439 | str += strspn(str, ", \t"); | |
440 | } | |
441 | ||
442 | return 1; | |
443 | } | |
444 | ||
445 | __setup("pnpbios=", pnpbios_setup); | |
446 | #endif | |
447 | ||
448 | /* PnP BIOS signature: "$PnP" */ | |
449 | #define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) | |
450 | ||
451 | static int __init pnpbios_probe_system(void) | |
452 | { | |
453 | union pnp_bios_install_struct *check; | |
454 | u8 sum; | |
455 | int length, i; | |
456 | ||
457 | printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); | |
458 | ||
459 | /* | |
9dd78466 | 460 | * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS |
1da177e4 LT |
461 | * structure and, if one is found, sets up the selectors and |
462 | * entry points | |
463 | */ | |
9dd78466 BH |
464 | for (check = (union pnp_bios_install_struct *)__va(0xf0000); |
465 | check < (union pnp_bios_install_struct *)__va(0xffff0); | |
1da177e4 LT |
466 | check = (void *)check + 16) { |
467 | if (check->fields.signature != PNP_SIGNATURE) | |
468 | continue; | |
9dd78466 BH |
469 | printk(KERN_INFO |
470 | "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", | |
471 | check); | |
1da177e4 LT |
472 | length = check->fields.length; |
473 | if (!length) { | |
9dd78466 BH |
474 | printk(KERN_ERR |
475 | "PnPBIOS: installation structure is invalid, skipping\n"); | |
1da177e4 LT |
476 | continue; |
477 | } | |
478 | for (sum = 0, i = 0; i < length; i++) | |
479 | sum += check->chars[i]; | |
480 | if (sum) { | |
9dd78466 BH |
481 | printk(KERN_ERR |
482 | "PnPBIOS: installation structure is corrupted, skipping\n"); | |
1da177e4 LT |
483 | continue; |
484 | } | |
485 | if (check->fields.version < 0x10) { | |
9dd78466 BH |
486 | printk(KERN_WARNING |
487 | "PnPBIOS: PnP BIOS version %d.%d is not supported\n", | |
1da177e4 LT |
488 | check->fields.version >> 4, |
489 | check->fields.version & 15); | |
490 | continue; | |
491 | } | |
9dd78466 BH |
492 | printk(KERN_INFO |
493 | "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", | |
494 | check->fields.version >> 4, check->fields.version & 15, | |
1da177e4 LT |
495 | check->fields.pm16cseg, check->fields.pm16offset, |
496 | check->fields.pm16dseg); | |
497 | pnp_bios_install = check; | |
498 | return 1; | |
499 | } | |
500 | ||
501 | printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); | |
502 | return 0; | |
503 | } | |
504 | ||
505 | static int __init exploding_pnp_bios(struct dmi_system_id *d) | |
506 | { | |
507 | printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); | |
508 | return 0; | |
509 | } | |
510 | ||
ffbe5523 | 511 | static struct dmi_system_id pnpbios_dmi_table[] __initdata = { |
9dd78466 BH |
512 | { /* PnPBIOS GPF on boot */ |
513 | .callback = exploding_pnp_bios, | |
514 | .ident = "Higraded P14H", | |
515 | .matches = { | |
516 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
517 | DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), | |
518 | DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), | |
519 | DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), | |
520 | }, | |
521 | }, | |
522 | { /* PnPBIOS GPF on boot */ | |
523 | .callback = exploding_pnp_bios, | |
524 | .ident = "ASUS P4P800", | |
525 | .matches = { | |
526 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), | |
527 | DMI_MATCH(DMI_BOARD_NAME, "P4P800"), | |
528 | }, | |
529 | }, | |
530 | {} | |
1da177e4 LT |
531 | }; |
532 | ||
533 | static int __init pnpbios_init(void) | |
534 | { | |
535 | int ret; | |
536 | ||
30cbc222 OH |
537 | #if defined(CONFIG_PPC_MERGE) |
538 | if (check_legacy_ioport(PNPBIOS_BASE)) | |
539 | return -ENODEV; | |
540 | #endif | |
6020c8f3 RR |
541 | if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) || |
542 | paravirt_enabled()) { | |
1da177e4 LT |
543 | printk(KERN_INFO "PnPBIOS: Disabled\n"); |
544 | return -ENODEV; | |
545 | } | |
1da177e4 LT |
546 | #ifdef CONFIG_PNPACPI |
547 | if (!acpi_disabled && !pnpacpi_disabled) { | |
548 | pnpbios_disabled = 1; | |
549 | printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); | |
550 | return -ENODEV; | |
551 | } | |
07d4e9af | 552 | #endif /* CONFIG_ACPI */ |
1da177e4 LT |
553 | |
554 | /* scan the system for pnpbios support */ | |
555 | if (!pnpbios_probe_system()) | |
556 | return -ENODEV; | |
557 | ||
558 | /* make preparations for bios calls */ | |
559 | pnpbios_calls_init(pnp_bios_install); | |
560 | ||
561 | /* read the node info */ | |
562 | ret = pnp_bios_dev_node_info(&node_info); | |
563 | if (ret) { | |
9dd78466 BH |
564 | printk(KERN_ERR |
565 | "PnPBIOS: Unable to get node info. Aborting.\n"); | |
1da177e4 LT |
566 | return ret; |
567 | } | |
568 | ||
569 | /* register with the pnp layer */ | |
570 | ret = pnp_register_protocol(&pnpbios_protocol); | |
571 | if (ret) { | |
9dd78466 BH |
572 | printk(KERN_ERR |
573 | "PnPBIOS: Unable to register driver. Aborting.\n"); | |
1da177e4 LT |
574 | return ret; |
575 | } | |
576 | ||
577 | /* start the proc interface */ | |
578 | ret = pnpbios_proc_init(); | |
579 | if (ret) | |
580 | printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); | |
581 | ||
582 | /* scan for pnpbios devices */ | |
583 | build_devlist(); | |
584 | ||
8f81dd14 | 585 | pnp_platform_devices = 1; |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
589 | subsys_initcall(pnpbios_init); | |
590 | ||
591 | static int __init pnpbios_thread_init(void) | |
592 | { | |
db9c02fa | 593 | struct task_struct *task; |
30cbc222 OH |
594 | #if defined(CONFIG_PPC_MERGE) |
595 | if (check_legacy_ioport(PNPBIOS_BASE)) | |
596 | return 0; | |
597 | #endif | |
1da177e4 LT |
598 | if (pnpbios_disabled) |
599 | return 0; | |
600 | #ifdef CONFIG_HOTPLUG | |
601 | init_completion(&unload_sem); | |
db9c02fa EB |
602 | task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd"); |
603 | if (!IS_ERR(task)) | |
1da177e4 LT |
604 | unloading = 0; |
605 | #endif | |
606 | return 0; | |
607 | } | |
608 | ||
609 | #ifndef MODULE | |
610 | ||
611 | /* init/main.c calls pnpbios_init early */ | |
612 | ||
613 | /* Start the kernel thread later: */ | |
614 | module_init(pnpbios_thread_init); | |
615 | ||
616 | #else | |
617 | ||
618 | /* | |
619 | * N.B.: Building pnpbios as a module hasn't been fully implemented | |
620 | */ | |
621 | ||
622 | MODULE_LICENSE("GPL"); | |
623 | ||
624 | static int __init pnpbios_init_all(void) | |
625 | { | |
626 | int r; | |
627 | ||
628 | r = pnpbios_init(); | |
629 | if (r) | |
630 | return r; | |
631 | r = pnpbios_thread_init(); | |
632 | if (r) | |
633 | return r; | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static void __exit pnpbios_exit(void) | |
638 | { | |
639 | #ifdef CONFIG_HOTPLUG | |
640 | unloading = 1; | |
641 | wait_for_completion(&unload_sem); | |
642 | #endif | |
643 | pnpbios_proc_exit(); | |
644 | /* We ought to free resources here */ | |
645 | return; | |
646 | } | |
647 | ||
648 | module_init(pnpbios_init_all); | |
649 | module_exit(pnpbios_exit); | |
650 | ||
651 | #endif | |
652 | ||
653 | EXPORT_SYMBOL(pnpbios_protocol); |