1 #include <linux/types.h>
2 #include <linux/kernel.h>
3 #include <linux/string.h>
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/slab.h>
10 #include <asm/system.h>
11 #include <linux/dmi.h>
12 #include <linux/bootmem.h>
27 #define dmi_printk(x) printk x
32 static char * __init dmi_string(struct dmi_header *dm, u8 s)
49 * We have to be cautious here. We have seen BIOSes with DMI pointers
50 * pointing to completely the wrong place for example
53 static int __init dmi_table(u32 base, int len, int num, void (*decode)(struct dmi_header *))
56 struct dmi_header *dm;
60 buf = bt_ioremap(base, len);
67 * Stop when we see all the items the table claimed to have
68 * OR we run off the end of the table (also happens)
71 while(i<num && data-buf+sizeof(struct dmi_header)<=len)
73 dm=(struct dmi_header *)data;
75 * We want to know the total length (formated area and strings)
76 * before decoding to make sure we won't run off the table in
77 * dmi_decode or dmi_string
80 while(data-buf<len-1 && (data[0] || data[1]))
92 inline static int __init dmi_checksum(u8 *buf)
102 static int __init dmi_iterate(void (*decode)(struct dmi_header *))
109 isa_memcpy_fromio(buf, fp, 15);
110 if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf))
112 u16 num=buf[13]<<8|buf[12];
113 u16 len=buf[7]<<8|buf[6];
114 u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8];
117 * DMI version 0.0 means that the real version is taken from
118 * the SMBIOS version, which we don't know at this point.
121 printk(KERN_INFO "DMI %d.%d present.\n",
122 buf[14]>>4, buf[14]&0x0F);
124 printk(KERN_INFO "DMI present.\n");
125 dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
127 dmi_printk((KERN_INFO "DMI table at 0x%08X.\n",
129 if(dmi_table(base,len, num, decode)==0)
137 static char *dmi_ident[DMI_STRING_MAX];
143 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
146 char *p = dmi_string(dm, d[string]);
147 if(p==NULL || *p == 0)
151 dmi_ident[slot] = alloc_bootmem(strlen(p)+1);
153 strcpy(dmi_ident[slot], p);
155 printk(KERN_ERR "dmi_save_ident: out of memory.\n");
159 * Ugly compatibility crap.
161 #define dmi_blacklist dmi_system_id
162 #define NO_MATCH { DMI_NONE, NULL}
163 #define MATCH DMI_MATCH
166 * Some machines, usually laptops, can't handle an enabled local APIC.
167 * The symptoms include hangs or reboots when suspending or resuming,
168 * attaching or detaching the power cord, or entering BIOS setup screens
169 * through magic key sequences.
171 static int __init local_apic_kills_bios(struct dmi_blacklist *d)
173 #ifdef CONFIG_X86_LOCAL_APIC
174 extern int enable_local_apic;
175 if (enable_local_apic == 0) {
176 enable_local_apic = -1;
177 printk(KERN_WARNING "%s with broken BIOS detected. "
178 "Refusing to enable the local APIC.\n",
187 * Toshiba keyboard likes to repeat keys when they are not repeated.
190 static __init int broken_toshiba_keyboard(struct dmi_blacklist *d)
192 printk(KERN_WARNING "Toshiba with broken keyboard detected. If your keyboard sometimes generates 3 keypresses instead of one, see http://davyd.ucc.asn.au/projects/toshiba/README\n");
197 #ifdef CONFIG_ACPI_SLEEP
198 static __init int reset_videomode_after_s3(struct dmi_blacklist *d)
200 /* See acpi_wakeup.S */
201 extern long acpi_video_flags;
202 acpi_video_flags |= 2;
208 #ifdef CONFIG_ACPI_BOOT
209 extern int acpi_force;
211 static __init __attribute__((unused)) int dmi_disable_acpi(struct dmi_blacklist *d)
214 printk(KERN_NOTICE "%s detected: acpi off\n",d->ident);
218 "Warning: DMI blacklist says broken, but acpi forced\n");
224 * Limit ACPI to CPU enumeration for HT
226 static __init __attribute__((unused)) int force_acpi_ht(struct dmi_blacklist *d)
229 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", d->ident);
234 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
240 * early nForce2 reference BIOS shipped with a
241 * bogus ACPI IRQ0 -> pin2 interrupt override -- ignore it
243 static __init int ignore_timer_override(struct dmi_blacklist *d)
245 extern int acpi_skip_timer_override;
246 printk(KERN_NOTICE "%s detected: BIOS IRQ0 pin2 override"
247 " will be ignored\n", d->ident);
249 acpi_skip_timer_override = 1;
254 #ifdef CONFIG_ACPI_PCI
255 static __init int disable_acpi_irq(struct dmi_blacklist *d)
258 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
264 static __init int disable_acpi_pci(struct dmi_blacklist *d)
267 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
276 * Process the DMI blacklists
281 * This will be expanded over time to force things like the APM
282 * interrupt mask settings according to the laptop
285 static __initdata struct dmi_blacklist dmi_blacklist[]={
287 /* Machines which have problems handling enabled local APICs */
289 { local_apic_kills_bios, "Dell Inspiron", {
290 MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
291 MATCH(DMI_PRODUCT_NAME, "Inspiron"),
295 { local_apic_kills_bios, "Dell Latitude", {
296 MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
297 MATCH(DMI_PRODUCT_NAME, "Latitude"),
301 { local_apic_kills_bios, "IBM Thinkpad T20", {
302 MATCH(DMI_BOARD_VENDOR, "IBM"),
303 MATCH(DMI_BOARD_NAME, "264741U"),
307 { local_apic_kills_bios, "ASUS L3C", {
308 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
309 MATCH(DMI_BOARD_NAME, "P4_L3C"),
313 { broken_toshiba_keyboard, "Toshiba Satellite 4030cdt", { /* Keyboard generates spurious repeats */
314 MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
315 NO_MATCH, NO_MATCH, NO_MATCH
317 #ifdef CONFIG_ACPI_SLEEP
318 { reset_videomode_after_s3, "Toshiba Satellite 4030cdt", { /* Reset video mode after returning from ACPI S3 sleep */
319 MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
320 NO_MATCH, NO_MATCH, NO_MATCH
324 #ifdef CONFIG_ACPI_BOOT
326 * If your system is blacklisted here, but you find that acpi=force
327 * works for you, please contact acpi-devel@sourceforge.net
331 * Boxes that need ACPI disabled
334 { dmi_disable_acpi, "IBM Thinkpad", {
335 MATCH(DMI_BOARD_VENDOR, "IBM"),
336 MATCH(DMI_BOARD_NAME, "2629H1G"),
337 NO_MATCH, NO_MATCH }},
340 * Boxes that need acpi=ht
343 { force_acpi_ht, "FSC Primergy T850", {
344 MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
345 MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
346 NO_MATCH, NO_MATCH }},
348 { force_acpi_ht, "DELL GX240", {
349 MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
350 MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
351 NO_MATCH, NO_MATCH }},
353 { force_acpi_ht, "HP VISUALIZE NT Workstation", {
354 MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
355 MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
356 NO_MATCH, NO_MATCH }},
358 { force_acpi_ht, "Compaq Workstation W8000", {
359 MATCH(DMI_SYS_VENDOR, "Compaq"),
360 MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
361 NO_MATCH, NO_MATCH }},
363 { force_acpi_ht, "ASUS P4B266", {
364 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
365 MATCH(DMI_BOARD_NAME, "P4B266"),
366 NO_MATCH, NO_MATCH }},
368 { force_acpi_ht, "ASUS P2B-DS", {
369 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
370 MATCH(DMI_BOARD_NAME, "P2B-DS"),
371 NO_MATCH, NO_MATCH }},
373 { force_acpi_ht, "ASUS CUR-DLS", {
374 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
375 MATCH(DMI_BOARD_NAME, "CUR-DLS"),
376 NO_MATCH, NO_MATCH }},
378 { force_acpi_ht, "ABIT i440BX-W83977", {
379 MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
380 MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
381 NO_MATCH, NO_MATCH }},
383 { force_acpi_ht, "IBM Bladecenter", {
384 MATCH(DMI_BOARD_VENDOR, "IBM"),
385 MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
386 NO_MATCH, NO_MATCH }},
388 { force_acpi_ht, "IBM eServer xSeries 360", {
389 MATCH(DMI_BOARD_VENDOR, "IBM"),
390 MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
391 NO_MATCH, NO_MATCH }},
393 { force_acpi_ht, "IBM eserver xSeries 330", {
394 MATCH(DMI_BOARD_VENDOR, "IBM"),
395 MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
396 NO_MATCH, NO_MATCH }},
398 { force_acpi_ht, "IBM eserver xSeries 440", {
399 MATCH(DMI_BOARD_VENDOR, "IBM"),
400 MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
401 NO_MATCH, NO_MATCH }},
404 * Systems with nForce2 BIOS timer override bug
405 * nVidia claims all nForce have timer on pin0,
406 * and applying this workaround is a NOP on fixed BIOS,
407 * so prospects are good for replacing these entries
408 * with something to key of chipset PCI-ID.
410 { ignore_timer_override, "Abit NF7-S v2", {
411 MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
412 MATCH(DMI_BOARD_NAME, "NF7-S/NF7,NF7-V (nVidia-nForce2)"),
413 MATCH(DMI_BIOS_VERSION, "6.00 PG"),
414 MATCH(DMI_BIOS_DATE, "03/24/2004") }},
416 { ignore_timer_override, "Asus A7N8X v2", {
417 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
418 MATCH(DMI_BOARD_NAME, "A7N8X2.0"),
419 MATCH(DMI_BIOS_VERSION, "ASUS A7N8X2.0 Deluxe ACPI BIOS Rev 1007"),
420 MATCH(DMI_BIOS_DATE, "10/06/2003") }},
422 { ignore_timer_override, "Asus A7N8X-X", {
423 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
424 MATCH(DMI_BOARD_NAME, "A7N8X-X"),
425 MATCH(DMI_BIOS_VERSION, "ASUS A7N8X-X ACPI BIOS Rev 1009"),
426 MATCH(DMI_BIOS_DATE, "2/3/2004") }},
428 { ignore_timer_override, "MSI K7N2-Delta", {
429 MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
430 MATCH(DMI_BOARD_NAME, "MS-6570"),
431 MATCH(DMI_BIOS_VERSION, "6.00 PG"),
432 MATCH(DMI_BIOS_DATE, "03/29/2004") }},
434 { ignore_timer_override, "Shuttle SN41G2", {
435 MATCH(DMI_BOARD_VENDOR, "Shuttle Inc"),
436 MATCH(DMI_BOARD_NAME, "FN41"),
437 MATCH(DMI_BIOS_VERSION, "6.00 PG"),
438 MATCH(DMI_BIOS_DATE, "01/14/2004") }},
440 { ignore_timer_override, "Shuttle AN35N", {
441 MATCH(DMI_BOARD_VENDOR, "Shuttle Inc"),
442 MATCH(DMI_BOARD_NAME, "AN35"),
443 MATCH(DMI_BIOS_VERSION, "6.00 PG"),
444 MATCH(DMI_BIOS_DATE, "12/05/2003") }},
445 #endif // CONFIG_ACPI_BOOT
447 #ifdef CONFIG_ACPI_PCI
449 * Boxes that need ACPI PCI IRQ routing disabled
452 { disable_acpi_irq, "ASUS A7V", {
453 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
454 MATCH(DMI_BOARD_NAME, "<A7V>"),
455 /* newer BIOS, Revision 1011, does work */
456 MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"),
460 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
462 { disable_acpi_pci, "ASUS PR-DLS", { /* _BBN 0 bug */
463 MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
464 MATCH(DMI_BOARD_NAME, "PR-DLS"),
465 MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"),
466 MATCH(DMI_BIOS_DATE, "03/21/2003") }},
468 { disable_acpi_pci, "Acer TravelMate 36x Laptop", {
469 MATCH(DMI_SYS_VENDOR, "Acer"),
470 MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
481 * Walk the blacklist table running matching functions until someone
482 * returns 1 or we hit the end.
486 static __init void dmi_check_blacklist(void)
488 #ifdef CONFIG_ACPI_BOOT
489 #define ACPI_BLACKLIST_CUTOFF_YEAR 2001
491 if (dmi_ident[DMI_BIOS_DATE]) {
492 char *s = strrchr(dmi_ident[DMI_BIOS_DATE], '/');
494 int year, disable = 0;
496 year = simple_strtoul(s,NULL,0);
498 disable = year < ACPI_BLACKLIST_CUTOFF_YEAR;
499 else if (year < 1 || (year > 90 && year <= 99))
501 if (disable && !acpi_force) {
502 printk(KERN_NOTICE "ACPI disabled because your bios is from %s and too old\n", s);
503 printk(KERN_NOTICE "You can enable it with acpi=force\n");
509 dmi_check_system(dmi_blacklist);
515 * Process a DMI table entry. Right now all we care about are the BIOS
516 * and machine entries. For 2.5 we should pull the smbus controller info
520 static void __init dmi_decode(struct dmi_header *dm)
529 dmi_printk(("BIOS Vendor: %s\n",
530 dmi_string(dm, data[4])));
531 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
532 dmi_printk(("BIOS Version: %s\n",
533 dmi_string(dm, data[5])));
534 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
535 dmi_printk(("BIOS Release: %s\n",
536 dmi_string(dm, data[8])));
537 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
540 dmi_printk(("System Vendor: %s\n",
541 dmi_string(dm, data[4])));
542 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
543 dmi_printk(("Product Name: %s\n",
544 dmi_string(dm, data[5])));
545 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
546 dmi_printk(("Version: %s\n",
547 dmi_string(dm, data[6])));
548 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
549 dmi_printk(("Serial Number: %s\n",
550 dmi_string(dm, data[7])));
553 dmi_printk(("Board Vendor: %s\n",
554 dmi_string(dm, data[4])));
555 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
556 dmi_printk(("Board Name: %s\n",
557 dmi_string(dm, data[5])));
558 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
559 dmi_printk(("Board Version: %s\n",
560 dmi_string(dm, data[6])));
561 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
566 void __init dmi_scan_machine(void)
568 int err = dmi_iterate(dmi_decode);
570 dmi_check_blacklist();
572 printk(KERN_INFO "DMI not present.\n");
577 * dmi_check_system - check system DMI data
578 * @list: array of dmi_system_id structures to match against
580 * Walk the blacklist table running matching functions until someone
581 * returns non zero or we hit the end. Callback function is called for
582 * each successfull match. Returns the number of matches.
584 int dmi_check_system(struct dmi_system_id *list)
587 struct dmi_system_id *d = list;
590 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
591 int s = d->matches[i].slot;
594 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
599 if (d->callback && d->callback(d))
608 EXPORT_SYMBOL(dmi_check_system);
611 * dmi_get_system_info - return DMI data value
612 * @field: data index (see enum dmi_filed)
614 * Returns one DMI data value, can be used to perform
615 * complex DMI data checks.
617 char * dmi_get_system_info(int field)
619 return dmi_ident[field];
622 EXPORT_SYMBOL(dmi_get_system_info);