Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 35 | |
| 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 64 | |
| 65 | #include <asm/page.h> |
| 66 | #include <asm/desc.h> |
| 67 | #include <asm/system.h> |
| 68 | #include <asm/byteorder.h> |
| 69 | |
| 70 | #include "pnpbios.h" |
| 71 | |
| 72 | |
| 73 | /* |
| 74 | * |
| 75 | * PnP BIOS INTERFACE |
| 76 | * |
| 77 | */ |
| 78 | |
| 79 | static union pnp_bios_install_struct * pnp_bios_install = NULL; |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | /* |
| 89 | * |
| 90 | * DOCKING FUNCTIONS |
| 91 | * |
| 92 | */ |
| 93 | |
| 94 | #ifdef CONFIG_HOTPLUG |
| 95 | |
| 96 | static int unloading = 0; |
| 97 | static struct completion unload_sem; |
| 98 | |
| 99 | /* |
| 100 | * (Much of this belongs in a shared routine somewhere) |
| 101 | */ |
| 102 | |
| 103 | static int pnp_dock_event(int dock, struct pnp_docking_station_info *info) |
| 104 | { |
| 105 | char *argv [3], **envp, *buf, *scratch; |
| 106 | int i = 0, value; |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | if (!current->fs->root) { |
| 109 | return -EAGAIN; |
| 110 | } |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 111 | if (!(envp = (char **) kcalloc (20, sizeof (char *), GFP_KERNEL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return -ENOMEM; |
| 113 | } |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 114 | if (!(buf = kcalloc (1, 256, GFP_KERNEL))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | kfree (envp); |
| 116 | return -ENOMEM; |
| 117 | } |
| 118 | |
Kay Sievers | 03438211 | 2005-11-11 04:25:06 +0100 | [diff] [blame] | 119 | /* FIXME: if there are actual users of this, it should be integrated into |
| 120 | * the driver core and use the usual infrastructure like sysfs and uevents */ |
| 121 | argv [0] = "/sbin/pnpbios"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | argv [1] = "dock"; |
| 123 | argv [2] = NULL; |
| 124 | |
| 125 | /* minimal command environment */ |
| 126 | envp [i++] = "HOME=/"; |
| 127 | envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; |
| 128 | |
| 129 | #ifdef DEBUG |
| 130 | /* hint that policy agent should enter no-stdout debug mode */ |
| 131 | envp [i++] = "DEBUG=kernel"; |
| 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 */ |
| 139 | envp [i++] = scratch; |
| 140 | scratch += sprintf (scratch, "ACTION=%s", dock?"add":"remove") + 1; |
| 141 | |
| 142 | /* Report the ident for the dock */ |
| 143 | envp [i++] = scratch; |
| 144 | scratch += sprintf (scratch, "DOCK=%x/%x/%x", |
| 145 | info->location_id, info->serial, info->capabilities); |
| 146 | envp[i] = NULL; |
| 147 | |
| 148 | value = call_usermodehelper (argv [0], argv, envp, 0); |
| 149 | kfree (buf); |
| 150 | kfree (envp); |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * Poll the PnP docking at regular intervals |
| 156 | */ |
| 157 | static int pnp_dock_thread(void * unused) |
| 158 | { |
| 159 | static struct pnp_docking_station_info now; |
| 160 | int docked = -1, d = 0; |
| 161 | daemonize("kpnpbiosd"); |
| 162 | allow_signal(SIGKILL); |
| 163 | while(!unloading && !signal_pending(current)) |
| 164 | { |
| 165 | int status; |
| 166 | |
| 167 | /* |
| 168 | * Poll every 2 seconds |
| 169 | */ |
| 170 | msleep_interruptible(2000); |
| 171 | |
| 172 | if(signal_pending(current)) { |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 173 | if (try_to_freeze()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | continue; |
| 175 | break; |
| 176 | } |
| 177 | |
| 178 | status = pnp_bios_dock_station_info(&now); |
| 179 | |
| 180 | switch(status) |
| 181 | { |
| 182 | /* |
| 183 | * No dock to manage |
| 184 | */ |
| 185 | case PNP_FUNCTION_NOT_SUPPORTED: |
| 186 | complete_and_exit(&unload_sem, 0); |
| 187 | case PNP_SYSTEM_NOT_DOCKED: |
| 188 | d = 0; |
| 189 | break; |
| 190 | case PNP_SUCCESS: |
| 191 | d = 1; |
| 192 | break; |
| 193 | default: |
| 194 | pnpbios_print_status( "pnp_dock_thread", status ); |
| 195 | continue; |
| 196 | } |
| 197 | if(d != docked) |
| 198 | { |
| 199 | if(pnp_dock_event(d, &now)==0) |
| 200 | { |
| 201 | docked = d; |
| 202 | #if 0 |
| 203 | printk(KERN_INFO "PnPBIOS: Docking station %stached\n", docked?"at":"de"); |
| 204 | #endif |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | complete_and_exit(&unload_sem, 0); |
| 209 | } |
| 210 | |
| 211 | #endif /* CONFIG_HOTPLUG */ |
| 212 | |
| 213 | static int pnpbios_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res) |
| 214 | { |
| 215 | u8 nodenum = dev->number; |
| 216 | struct pnp_bios_node * node; |
| 217 | |
| 218 | /* just in case */ |
| 219 | if(!pnpbios_is_dynamic(dev)) |
| 220 | return -EPERM; |
| 221 | |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 222 | node = kcalloc(1, node_info.max_node_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (!node) |
| 224 | return -1; |
| 225 | if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) { |
| 226 | kfree(node); |
| 227 | return -ENODEV; |
| 228 | } |
| 229 | pnpbios_read_resources_from_node(res, node); |
| 230 | dev->active = pnp_is_active(dev); |
| 231 | kfree(node); |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | static int pnpbios_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res) |
| 236 | { |
| 237 | u8 nodenum = dev->number; |
| 238 | struct pnp_bios_node * node; |
| 239 | int ret; |
| 240 | |
| 241 | /* just in case */ |
| 242 | if (!pnpbios_is_dynamic(dev)) |
| 243 | return -EPERM; |
| 244 | |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 245 | node = kcalloc(1, node_info.max_node_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (!node) |
| 247 | return -1; |
| 248 | if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) { |
| 249 | kfree(node); |
| 250 | return -ENODEV; |
| 251 | } |
| 252 | if(pnpbios_write_resources_to_node(res, node)<0) { |
| 253 | kfree(node); |
| 254 | return -1; |
| 255 | } |
| 256 | ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node); |
| 257 | kfree(node); |
| 258 | if (ret > 0) |
| 259 | ret = -1; |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static void pnpbios_zero_data_stream(struct pnp_bios_node * node) |
| 264 | { |
| 265 | unsigned char * p = (char *)node->data; |
| 266 | unsigned char * end = (char *)(node->data + node->size); |
| 267 | unsigned int len; |
| 268 | int i; |
| 269 | while ((char *)p < (char *)end) { |
| 270 | if(p[0] & 0x80) { /* large tag */ |
| 271 | len = (p[2] << 8) | p[1]; |
| 272 | p += 3; |
| 273 | } else { |
| 274 | if (((p[0]>>3) & 0x0f) == 0x0f) |
| 275 | return; |
| 276 | len = p[0] & 0x07; |
| 277 | p += 1; |
| 278 | } |
| 279 | for (i = 0; i < len; i++) |
| 280 | p[i] = 0; |
| 281 | p += len; |
| 282 | } |
| 283 | printk(KERN_ERR "PnPBIOS: Resource structure did not contain an end tag.\n"); |
| 284 | } |
| 285 | |
| 286 | static int pnpbios_disable_resources(struct pnp_dev *dev) |
| 287 | { |
| 288 | struct pnp_bios_node * node; |
| 289 | u8 nodenum = dev->number; |
| 290 | int ret; |
| 291 | |
| 292 | /* just in case */ |
| 293 | if(dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev)) |
| 294 | return -EPERM; |
| 295 | |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 296 | node = kcalloc(1, node_info.max_node_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | if (!node) |
| 298 | return -ENOMEM; |
| 299 | |
| 300 | if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) { |
| 301 | kfree(node); |
| 302 | return -ENODEV; |
| 303 | } |
| 304 | pnpbios_zero_data_stream(node); |
| 305 | |
| 306 | ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node); |
| 307 | kfree(node); |
| 308 | if (ret > 0) |
| 309 | ret = -1; |
| 310 | return ret; |
| 311 | } |
| 312 | |
| 313 | /* PnP Layer support */ |
| 314 | |
| 315 | struct pnp_protocol pnpbios_protocol = { |
| 316 | .name = "Plug and Play BIOS", |
| 317 | .get = pnpbios_get_resources, |
| 318 | .set = pnpbios_set_resources, |
| 319 | .disable = pnpbios_disable_resources, |
| 320 | }; |
| 321 | |
| 322 | static int insert_device(struct pnp_dev *dev, struct pnp_bios_node * node) |
| 323 | { |
| 324 | struct list_head * pos; |
| 325 | struct pnp_dev * pnp_dev; |
| 326 | struct pnp_id *dev_id; |
| 327 | char id[8]; |
| 328 | |
| 329 | /* check if the device is already added */ |
| 330 | dev->number = node->handle; |
| 331 | list_for_each (pos, &pnpbios_protocol.devices){ |
| 332 | pnp_dev = list_entry(pos, struct pnp_dev, protocol_list); |
| 333 | if (dev->number == pnp_dev->number) |
| 334 | return -1; |
| 335 | } |
| 336 | |
| 337 | /* set the initial values for the PnP device */ |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 338 | dev_id = kcalloc(1, sizeof(struct pnp_id), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (!dev_id) |
| 340 | return -1; |
| 341 | pnpid32_to_pnpid(node->eisa_id,id); |
| 342 | memcpy(dev_id->id,id,7); |
| 343 | pnp_add_id(dev_id, dev); |
| 344 | pnpbios_parse_data_stream(dev, node); |
| 345 | dev->active = pnp_is_active(dev); |
| 346 | dev->flags = node->flags; |
| 347 | if (!(dev->flags & PNPBIOS_NO_CONFIG)) |
| 348 | dev->capabilities |= PNP_CONFIGURABLE; |
| 349 | if (!(dev->flags & PNPBIOS_NO_DISABLE)) |
| 350 | dev->capabilities |= PNP_DISABLE; |
| 351 | dev->capabilities |= PNP_READ; |
| 352 | if (pnpbios_is_dynamic(dev)) |
| 353 | dev->capabilities |= PNP_WRITE; |
| 354 | if (dev->flags & PNPBIOS_REMOVABLE) |
| 355 | dev->capabilities |= PNP_REMOVABLE; |
| 356 | dev->protocol = &pnpbios_protocol; |
| 357 | |
| 358 | /* clear out the damaged flags */ |
| 359 | if (!dev->active) |
| 360 | pnp_init_resource_table(&dev->res); |
| 361 | |
| 362 | pnp_add_device(dev); |
| 363 | pnpbios_interface_attach_device(node); |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | static void __init build_devlist(void) |
| 369 | { |
| 370 | u8 nodenum; |
| 371 | unsigned int nodes_got = 0; |
| 372 | unsigned int devs = 0; |
| 373 | struct pnp_bios_node *node; |
| 374 | struct pnp_dev *dev; |
| 375 | |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 376 | node = kcalloc(1, node_info.max_node_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | if (!node) |
| 378 | return; |
| 379 | |
| 380 | for(nodenum=0; nodenum<0xff; ) { |
| 381 | u8 thisnodenum = nodenum; |
| 382 | /* eventually we will want to use PNPMODE_STATIC here but for now |
| 383 | * dynamic will help us catch buggy bioses to add to the blacklist. |
| 384 | */ |
| 385 | if (!pnpbios_dont_use_current_config) { |
| 386 | if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_DYNAMIC, node)) |
| 387 | break; |
| 388 | } else { |
| 389 | if (pnp_bios_get_dev_node(&nodenum, (char )PNPMODE_STATIC, node)) |
| 390 | break; |
| 391 | } |
| 392 | nodes_got++; |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 393 | dev = kcalloc(1, sizeof (struct pnp_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (!dev) |
| 395 | break; |
| 396 | if(insert_device(dev,node)<0) |
| 397 | kfree(dev); |
| 398 | else |
| 399 | devs++; |
| 400 | if (nodenum <= thisnodenum) { |
| 401 | printk(KERN_ERR "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n", (unsigned int)nodenum, (unsigned int)thisnodenum); |
| 402 | break; |
| 403 | } |
| 404 | } |
| 405 | kfree(node); |
| 406 | |
| 407 | printk(KERN_INFO "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n", |
| 408 | nodes_got, nodes_got != 1 ? "s" : "", devs); |
| 409 | } |
| 410 | |
| 411 | /* |
| 412 | * |
| 413 | * INIT AND EXIT |
| 414 | * |
| 415 | */ |
| 416 | |
| 417 | static int pnpbios_disabled; /* = 0 */ |
| 418 | int pnpbios_dont_use_current_config; /* = 0 */ |
| 419 | |
| 420 | #ifndef MODULE |
| 421 | static int __init pnpbios_setup(char *str) |
| 422 | { |
| 423 | int invert; |
| 424 | |
| 425 | while ((str != NULL) && (*str != '\0')) { |
| 426 | if (strncmp(str, "off", 3) == 0) |
| 427 | pnpbios_disabled=1; |
| 428 | if (strncmp(str, "on", 2) == 0) |
| 429 | pnpbios_disabled=0; |
| 430 | invert = (strncmp(str, "no-", 3) == 0); |
| 431 | if (invert) |
| 432 | str += 3; |
| 433 | if (strncmp(str, "curr", 4) == 0) |
| 434 | pnpbios_dont_use_current_config = invert; |
| 435 | str = strchr(str, ','); |
| 436 | if (str != NULL) |
| 437 | str += strspn(str, ", \t"); |
| 438 | } |
| 439 | |
| 440 | return 1; |
| 441 | } |
| 442 | |
| 443 | __setup("pnpbios=", pnpbios_setup); |
| 444 | #endif |
| 445 | |
| 446 | /* PnP BIOS signature: "$PnP" */ |
| 447 | #define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24)) |
| 448 | |
| 449 | static int __init pnpbios_probe_system(void) |
| 450 | { |
| 451 | union pnp_bios_install_struct *check; |
| 452 | u8 sum; |
| 453 | int length, i; |
| 454 | |
| 455 | printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n"); |
| 456 | |
| 457 | /* |
| 458 | * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS |
| 459 | * structure and, if one is found, sets up the selectors and |
| 460 | * entry points |
| 461 | */ |
| 462 | for (check = (union pnp_bios_install_struct *) __va(0xf0000); |
| 463 | check < (union pnp_bios_install_struct *) __va(0xffff0); |
| 464 | check = (void *)check + 16) { |
| 465 | if (check->fields.signature != PNP_SIGNATURE) |
| 466 | continue; |
| 467 | printk(KERN_INFO "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n", check); |
| 468 | length = check->fields.length; |
| 469 | if (!length) { |
| 470 | printk(KERN_ERR "PnPBIOS: installation structure is invalid, skipping\n"); |
| 471 | continue; |
| 472 | } |
| 473 | for (sum = 0, i = 0; i < length; i++) |
| 474 | sum += check->chars[i]; |
| 475 | if (sum) { |
| 476 | printk(KERN_ERR "PnPBIOS: installation structure is corrupted, skipping\n"); |
| 477 | continue; |
| 478 | } |
| 479 | if (check->fields.version < 0x10) { |
| 480 | printk(KERN_WARNING "PnPBIOS: PnP BIOS version %d.%d is not supported\n", |
| 481 | check->fields.version >> 4, |
| 482 | check->fields.version & 15); |
| 483 | continue; |
| 484 | } |
| 485 | printk(KERN_INFO "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n", |
| 486 | check->fields.version >> 4, check->fields.version & 15, |
| 487 | check->fields.pm16cseg, check->fields.pm16offset, |
| 488 | check->fields.pm16dseg); |
| 489 | pnp_bios_install = check; |
| 490 | return 1; |
| 491 | } |
| 492 | |
| 493 | printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n"); |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static int __init exploding_pnp_bios(struct dmi_system_id *d) |
| 498 | { |
| 499 | printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident); |
| 500 | return 0; |
| 501 | } |
| 502 | |
maximilian attems | ffbe552 | 2005-04-16 15:25:51 -0700 | [diff] [blame] | 503 | static struct dmi_system_id pnpbios_dmi_table[] __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | { /* PnPBIOS GPF on boot */ |
| 505 | .callback = exploding_pnp_bios, |
| 506 | .ident = "Higraded P14H", |
| 507 | .matches = { |
| 508 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), |
| 509 | DMI_MATCH(DMI_BIOS_VERSION, "07.00T"), |
| 510 | DMI_MATCH(DMI_SYS_VENDOR, "Higraded"), |
| 511 | DMI_MATCH(DMI_PRODUCT_NAME, "P14H"), |
| 512 | }, |
| 513 | }, |
| 514 | { /* PnPBIOS GPF on boot */ |
| 515 | .callback = exploding_pnp_bios, |
| 516 | .ident = "ASUS P4P800", |
| 517 | .matches = { |
| 518 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."), |
| 519 | DMI_MATCH(DMI_BOARD_NAME, "P4P800"), |
| 520 | }, |
| 521 | }, |
| 522 | { } |
| 523 | }; |
| 524 | |
| 525 | static int __init pnpbios_init(void) |
| 526 | { |
| 527 | int ret; |
| 528 | |
| 529 | if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table)) { |
| 530 | printk(KERN_INFO "PnPBIOS: Disabled\n"); |
| 531 | return -ENODEV; |
| 532 | } |
| 533 | |
| 534 | #ifdef CONFIG_PNPACPI |
| 535 | if (!acpi_disabled && !pnpacpi_disabled) { |
| 536 | pnpbios_disabled = 1; |
| 537 | printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n"); |
| 538 | return -ENODEV; |
| 539 | } |
| 540 | #endif /* CONFIG_ACPI */ |
| 541 | |
| 542 | /* scan the system for pnpbios support */ |
| 543 | if (!pnpbios_probe_system()) |
| 544 | return -ENODEV; |
| 545 | |
| 546 | /* make preparations for bios calls */ |
| 547 | pnpbios_calls_init(pnp_bios_install); |
| 548 | |
| 549 | /* read the node info */ |
| 550 | ret = pnp_bios_dev_node_info(&node_info); |
| 551 | if (ret) { |
| 552 | printk(KERN_ERR "PnPBIOS: Unable to get node info. Aborting.\n"); |
| 553 | return ret; |
| 554 | } |
| 555 | |
| 556 | /* register with the pnp layer */ |
| 557 | ret = pnp_register_protocol(&pnpbios_protocol); |
| 558 | if (ret) { |
| 559 | printk(KERN_ERR "PnPBIOS: Unable to register driver. Aborting.\n"); |
| 560 | return ret; |
| 561 | } |
| 562 | |
| 563 | /* start the proc interface */ |
| 564 | ret = pnpbios_proc_init(); |
| 565 | if (ret) |
| 566 | printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n"); |
| 567 | |
| 568 | /* scan for pnpbios devices */ |
| 569 | build_devlist(); |
| 570 | |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | subsys_initcall(pnpbios_init); |
| 575 | |
| 576 | static int __init pnpbios_thread_init(void) |
| 577 | { |
| 578 | if (pnpbios_disabled) |
| 579 | return 0; |
| 580 | #ifdef CONFIG_HOTPLUG |
| 581 | init_completion(&unload_sem); |
| 582 | if (kernel_thread(pnp_dock_thread, NULL, CLONE_KERNEL) > 0) |
| 583 | unloading = 0; |
| 584 | #endif |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | #ifndef MODULE |
| 589 | |
| 590 | /* init/main.c calls pnpbios_init early */ |
| 591 | |
| 592 | /* Start the kernel thread later: */ |
| 593 | module_init(pnpbios_thread_init); |
| 594 | |
| 595 | #else |
| 596 | |
| 597 | /* |
| 598 | * N.B.: Building pnpbios as a module hasn't been fully implemented |
| 599 | */ |
| 600 | |
| 601 | MODULE_LICENSE("GPL"); |
| 602 | |
| 603 | static int __init pnpbios_init_all(void) |
| 604 | { |
| 605 | int r; |
| 606 | |
| 607 | r = pnpbios_init(); |
| 608 | if (r) |
| 609 | return r; |
| 610 | r = pnpbios_thread_init(); |
| 611 | if (r) |
| 612 | return r; |
| 613 | return 0; |
| 614 | } |
| 615 | |
| 616 | static void __exit pnpbios_exit(void) |
| 617 | { |
| 618 | #ifdef CONFIG_HOTPLUG |
| 619 | unloading = 1; |
| 620 | wait_for_completion(&unload_sem); |
| 621 | #endif |
| 622 | pnpbios_proc_exit(); |
| 623 | /* We ought to free resources here */ |
| 624 | return; |
| 625 | } |
| 626 | |
| 627 | module_init(pnpbios_init_all); |
| 628 | module_exit(pnpbios_exit); |
| 629 | |
| 630 | #endif |
| 631 | |
| 632 | EXPORT_SYMBOL(pnpbios_protocol); |