[deliverable/linux.git] / drivers / acpi / blacklist.c

/*
 *  blacklist.c
 *
 *  Check to see if the given machine has a known bad ACPI BIOS
 *  or if the BIOS is too old.
 *
 *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
 *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <linux/dmi.h>

enum acpi_blacklist_predicates {
	all_versions,
	less_than_or_equal,
	equal,
	greater_than_or_equal,
};

struct acpi_blacklist_item {
	char oem_id[7];
	char oem_table_id[9];
	u32 oem_revision;
	acpi_table_type table;
	enum acpi_blacklist_predicates oem_revision_predicate;
	char *reason;
	u32 is_critical_error;
};

/*
 * POLICY: If *anything* doesn't work, put it on the blacklist.
 *	   If they are critical errors, mark it critical, and abort driver load.
 */
static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
	/* Compaq Presario 1700 */
	{"PTLTD ", "  DSDT  ", 0x06040000, ACPI_DSDT, less_than_or_equal,
	 "Multiple problems", 1},
	/* Sony FX120, FX140, FX150? */
	{"SONY  ", "U0      ", 0x20010313, ACPI_DSDT, less_than_or_equal,
	 "ACPI driver problem", 1},
	/* Compaq Presario 800, Insyde BIOS */
	{"INT440", "SYSFexxx", 0x00001001, ACPI_DSDT, less_than_or_equal,
	 "Does not use _REG to protect EC OpRegions", 1},
	/* IBM 600E - _ADR should return 7, but it returns 1 */
	{"IBM   ", "TP600E  ", 0x00000105, ACPI_DSDT, less_than_or_equal,
	 "Incorrect _ADR", 1},
	{"ASUS\0\0", "P2B-S   ", 0, ACPI_DSDT, all_versions,
	 "Bogus PCI routing", 1},

	{""}
};

#if	CONFIG_ACPI_BLACKLIST_YEAR

static int __init blacklist_by_year(void)
{
	int year = dmi_get_year(DMI_BIOS_DATE);
	/* Doesn't exist? Likely an old system */
	if (year == -1) 
		return 1;
	/* 0? Likely a buggy new BIOS */
	if (year == 0)
		return 0;
	if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
		printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
		       "acpi=force is required to enable ACPI\n",
		       year, CONFIG_ACPI_BLACKLIST_YEAR);
		return 1;
	}
	return 0;
}
#else
static inline int blacklist_by_year(void)
{
	return 0;
}
#endif

int __init acpi_blacklisted(void)
{
	int i = 0;
	int blacklisted = 0;
	struct acpi_table_header *table_header;

	while (acpi_blacklist[i].oem_id[0] != '\0') {
		if (acpi_get_table_header_early
		    (acpi_blacklist[i].table, &table_header)) {
			i++;
			continue;
		}

		if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
			i++;
			continue;
		}

		if (strncmp
		    (acpi_blacklist[i].oem_table_id, table_header->oem_table_id,
		     8)) {
			i++;
			continue;
		}

		if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
		    || (acpi_blacklist[i].oem_revision_predicate ==
			less_than_or_equal
			&& table_header->oem_revision <=
			acpi_blacklist[i].oem_revision)
		    || (acpi_blacklist[i].oem_revision_predicate ==
			greater_than_or_equal
			&& table_header->oem_revision >=
			acpi_blacklist[i].oem_revision)
		    || (acpi_blacklist[i].oem_revision_predicate == equal
			&& table_header->oem_revision ==
			acpi_blacklist[i].oem_revision)) {

			printk(KERN_ERR PREFIX
			       "Vendor \"%6.6s\" System \"%8.8s\" "
			       "Revision 0x%x has a known ACPI BIOS problem.\n",
			       acpi_blacklist[i].oem_id,
			       acpi_blacklist[i].oem_table_id,
			       acpi_blacklist[i].oem_revision);

			printk(KERN_ERR PREFIX
			       "Reason: %s. This is a %s error\n",
			       acpi_blacklist[i].reason,
			       (acpi_blacklist[i].
				is_critical_error ? "non-recoverable" :
				"recoverable"));

			blacklisted = acpi_blacklist[i].is_critical_error;
			break;
		} else {
			i++;
		}
	}

	blacklisted += blacklist_by_year();

	return blacklisted;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* blacklist.c
	3	*
	4	* Check to see if the given machine has a known bad ACPI BIOS
	5	* or if the BIOS is too old.
	6	*
	7	* Copyright (C) 2004 Len Brown <len.brown@intel.com>
	8	* Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
	9	*
	10	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or (at
	15	* your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful, but
	18	* WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	20	* General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License along
	23	* with this program; if not, write to the Free Software Foundation, Inc.,
	24	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	25	*
	26	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	27	*/
	28
1da177e4 LT	29	#include <linux/kernel.h>
	30	#include <linux/module.h>
	31	#include <linux/init.h>
	32	#include <linux/acpi.h>
	33	#include <acpi/acpi_bus.h>
	34	#include <linux/dmi.h>
	35
4be44fcd LB	36	enum acpi_blacklist_predicates {
	37	all_versions,
	38	less_than_or_equal,
	39	equal,
	40	greater_than_or_equal,
1da177e4 LT	41	};
1da177e4 LT	42
4be44fcd LB	43	struct acpi_blacklist_item {
	44	char oem_id[7];
	45	char oem_table_id[9];
	46	u32 oem_revision;
	47	acpi_table_type table;
	48	enum acpi_blacklist_predicates oem_revision_predicate;
	49	char *reason;
	50	u32 is_critical_error;
1da177e4 LT	51	};
	52
	53	/*
	54	* POLICY: If anything doesn't work, put it on the blacklist.
	55	* If they are critical errors, mark it critical, and abort driver load.
	56	*/
4be44fcd	57	static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
1da177e4	58	/* Compaq Presario 1700 */
4be44fcd LB	59	{"PTLTD ", " DSDT ", 0x06040000, ACPI_DSDT, less_than_or_equal,
4be44fcd LB	60	"Multiple problems", 1},
1da177e4	61	/* Sony FX120, FX140, FX150? */
4be44fcd LB	62	{"SONY ", "U0 ", 0x20010313, ACPI_DSDT, less_than_or_equal,
4be44fcd LB	63	"ACPI driver problem", 1},
1da177e4	64	/* Compaq Presario 800, Insyde BIOS */
4be44fcd LB	65	{"INT440", "SYSFexxx", 0x00001001, ACPI_DSDT, less_than_or_equal,
4be44fcd LB	66	"Does not use _REG to protect EC OpRegions", 1},
1da177e4	67	/* IBM 600E - _ADR should return 7, but it returns 1 */
4be44fcd LB	68	{"IBM ", "TP600E ", 0x00000105, ACPI_DSDT, less_than_or_equal,
	69	"Incorrect _ADR", 1},
	70	{"ASUS\0\0", "P2B-S ", 0, ACPI_DSDT, all_versions,
	71	"Bogus PCI routing", 1},
1da177e4 LT	72
	73	{""}
	74	};
	75
1da177e4 LT	76	#if CONFIG_ACPI_BLACKLIST_YEAR
1da177e4 LT	77
4be44fcd	78	static int __init blacklist_by_year(void)
1da177e4	79	{
f083a329 AK	80	int year = dmi_get_year(DMI_BIOS_DATE);
	81	/* Doesn't exist? Likely an old system */
	82	if (year == -1)
	83	return 1;
	84	/* 0? Likely a buggy new BIOS */
	85	if (year == 0)
1da177e4	86	return 0;
1da177e4	87	if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
4be44fcd LB	88	printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
	89	"acpi=force is required to enable ACPI\n",
	90	year, CONFIG_ACPI_BLACKLIST_YEAR);
1da177e4 LT	91	return 1;
	92	}
	93	return 0;
	94	}
	95	#else
4be44fcd LB	96	static inline int blacklist_by_year(void)
	97	{
	98	return 0;
	99	}
1da177e4 LT	100	#endif
1da177e4 LT	101
4be44fcd	102	int __init acpi_blacklisted(void)
1da177e4 LT	103	{
	104	int i = 0;
	105	int blacklisted = 0;
	106	struct acpi_table_header *table_header;
	107
4be44fcd LB	108	while (acpi_blacklist[i].oem_id[0] != '\0') {
	109	if (acpi_get_table_header_early
	110	(acpi_blacklist[i].table, &table_header)) {
1da177e4 LT	111	i++;
	112	continue;
	113	}
	114
	115	if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
	116	i++;
	117	continue;
	118	}
	119
4be44fcd LB	120	if (strncmp
	121	(acpi_blacklist[i].oem_table_id, table_header->oem_table_id,
	122	8)) {
1da177e4 LT	123	i++;
	124	continue;
	125	}
	126
	127	if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
4be44fcd LB	128	\|\| (acpi_blacklist[i].oem_revision_predicate ==
	129	less_than_or_equal
	130	&& table_header->oem_revision <=
	131	acpi_blacklist[i].oem_revision)
	132	\|\| (acpi_blacklist[i].oem_revision_predicate ==
	133	greater_than_or_equal
	134	&& table_header->oem_revision >=
	135	acpi_blacklist[i].oem_revision)
1da177e4	136	\|\| (acpi_blacklist[i].oem_revision_predicate == equal
4be44fcd LB	137	&& table_header->oem_revision ==
	138	acpi_blacklist[i].oem_revision)) {
	139
	140	printk(KERN_ERR PREFIX
	141	"Vendor \"%6.6s\" System \"%8.8s\" "
	142	"Revision 0x%x has a known ACPI BIOS problem.\n",
	143	acpi_blacklist[i].oem_id,
	144	acpi_blacklist[i].oem_table_id,
	145	acpi_blacklist[i].oem_revision);
	146
	147	printk(KERN_ERR PREFIX
	148	"Reason: %s. This is a %s error\n",
	149	acpi_blacklist[i].reason,
	150	(acpi_blacklist[i].
	151	is_critical_error ? "non-recoverable" :
	152	"recoverable"));
1da177e4 LT	153
	154	blacklisted = acpi_blacklist[i].is_critical_error;
	155	break;
4be44fcd	156	} else {
1da177e4 LT	157	i++;
	158	}
	159	}
	160
	161	blacklisted += blacklist_by_year();
	162
	163	return blacklisted;
	164	}