[GitHub/mt8127/android_kernel_alcatel_ttab.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.
 *  Check given machine against acpi_osi_dmi_table[].
 *
 *  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;
	char *table;
	enum acpi_blacklist_predicates oem_revision_predicate;
	char *reason;
	u32 is_critical_error;
};

static struct dmi_system_id acpi_osi_dmi_table[] __initdata;

/*
 * 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_SIG_DSDT, less_than_or_equal,
	 "Multiple problems", 1},
	/* Sony FX120, FX140, FX150? */
	{"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
	 "ACPI driver problem", 1},
	/* Compaq Presario 800, Insyde BIOS */
	{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_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_SIG_DSDT, less_than_or_equal,
	 "Incorrect _ADR", 1},
	{"ASUS\0\0", "P2B-S   ", 0, ACPI_SIG_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) {
		printk(KERN_ERR PREFIX "no DMI BIOS year, "
			"acpi=force is required to enable ACPI\n" );
		return 1;
	}
	/* 0? Likely a buggy new BIOS */
	if (year == 0) {
		printk(KERN_ERR PREFIX "DMI BIOS year==0, "
			"assuming ACPI-capable machine\n" );
		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(acpi_blacklist[i].table, 0, &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();

	dmi_check_system(acpi_osi_dmi_table);

	return blacklisted;
}
#ifdef CONFIG_DMI
static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
	{}
};

#endif /* CONFIG_DMI */
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.
d4b7dc49	6	* Check given machine against acpi_osi_dmi_table[].
1da177e4 LT	7	*
	8	* Copyright (C) 2004 Len Brown <len.brown@intel.com>
	9	* Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
	10	*
	11	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or (at
	16	* your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful, but
	19	* WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	21	* General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License along
	24	* with this program; if not, write to the Free Software Foundation, Inc.,
	25	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	26	*
	27	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	28	*/
	29
1da177e4 LT	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
	32	#include <linux/init.h>
	33	#include <linux/acpi.h>
	34	#include <acpi/acpi_bus.h>
	35	#include <linux/dmi.h>
	36
4be44fcd LB	37	enum acpi_blacklist_predicates {
	38	all_versions,
	39	less_than_or_equal,
	40	equal,
	41	greater_than_or_equal,
1da177e4 LT	42	};
1da177e4 LT	43
4be44fcd LB	44	struct acpi_blacklist_item {
	45	char oem_id[7];
	46	char oem_table_id[9];
	47	u32 oem_revision;
ad71860a	48	char *table;
4be44fcd LB	49	enum acpi_blacklist_predicates oem_revision_predicate;
	50	char *reason;
	51	u32 is_critical_error;
1da177e4 LT	52	};
1da177e4 LT	53
d4b7dc49 LB	54	static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
d4b7dc49 LB	55
1da177e4 LT	56	/*
	57	* POLICY: If anything doesn't work, put it on the blacklist.
	58	* If they are critical errors, mark it critical, and abort driver load.
	59	*/
4be44fcd	60	static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
1da177e4	61	/* Compaq Presario 1700 */
ad71860a	62	{"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
4be44fcd	63	"Multiple problems", 1},
1da177e4	64	/* Sony FX120, FX140, FX150? */
ad71860a	65	{"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
4be44fcd	66	"ACPI driver problem", 1},
1da177e4	67	/* Compaq Presario 800, Insyde BIOS */
ad71860a	68	{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
4be44fcd	69	"Does not use _REG to protect EC OpRegions", 1},
1da177e4	70	/* IBM 600E - _ADR should return 7, but it returns 1 */
ad71860a	71	{"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
4be44fcd	72	"Incorrect _ADR", 1},
ad71860a	73	{"ASUS\0\0", "P2B-S ", 0, ACPI_SIG_DSDT, all_versions,
4be44fcd	74	"Bogus PCI routing", 1},
1da177e4 LT	75
	76	{""}
	77	};
	78
1da177e4 LT	79	#if CONFIG_ACPI_BLACKLIST_YEAR
1da177e4 LT	80
4be44fcd	81	static int __init blacklist_by_year(void)
1da177e4	82	{
f083a329 AK	83	int year = dmi_get_year(DMI_BIOS_DATE);
f083a329 AK	84	/* Doesn't exist? Likely an old system */
5b27b176 AGACI	85	if (year == -1) {
	86	printk(KERN_ERR PREFIX "no DMI BIOS year, "
	87	"acpi=force is required to enable ACPI\n" );
f083a329	88	return 1;
5b27b176	89	}
f083a329	90	/* 0? Likely a buggy new BIOS */
5b27b176 AGACI	91	if (year == 0) {
	92	printk(KERN_ERR PREFIX "DMI BIOS year==0, "
	93	"assuming ACPI-capable machine\n" );
1da177e4	94	return 0;
5b27b176	95	}
1da177e4	96	if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
4be44fcd LB	97	printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
	98	"acpi=force is required to enable ACPI\n",
	99	year, CONFIG_ACPI_BLACKLIST_YEAR);
1da177e4 LT	100	return 1;
	101	}
	102	return 0;
	103	}
	104	#else
4be44fcd LB	105	static inline int blacklist_by_year(void)
	106	{
	107	return 0;
	108	}
1da177e4 LT	109	#endif
1da177e4 LT	110
4be44fcd	111	int __init acpi_blacklisted(void)
1da177e4 LT	112	{
	113	int i = 0;
	114	int blacklisted = 0;
428f2112	115	struct acpi_table_header table_header;
1da177e4	116
4be44fcd	117	while (acpi_blacklist[i].oem_id[0] != '\0') {
ad71860a	118	if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
1da177e4 LT	119	i++;
	120	continue;
	121	}
	122
428f2112	123	if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
1da177e4 LT	124	i++;
	125	continue;
	126	}
	127
4be44fcd	128	if (strncmp
428f2112	129	(acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
4be44fcd	130	8)) {
1da177e4 LT	131	i++;
	132	continue;
	133	}
	134
	135	if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
4be44fcd LB	136	\|\| (acpi_blacklist[i].oem_revision_predicate ==
4be44fcd LB	137	less_than_or_equal
428f2112	138	&& table_header.oem_revision <=
4be44fcd LB	139	acpi_blacklist[i].oem_revision)
	140	\|\| (acpi_blacklist[i].oem_revision_predicate ==
	141	greater_than_or_equal
428f2112	142	&& table_header.oem_revision >=
4be44fcd	143	acpi_blacklist[i].oem_revision)
1da177e4	144	\|\| (acpi_blacklist[i].oem_revision_predicate == equal
428f2112	145	&& table_header.oem_revision ==
4be44fcd LB	146	acpi_blacklist[i].oem_revision)) {
	147
	148	printk(KERN_ERR PREFIX
	149	"Vendor \"%6.6s\" System \"%8.8s\" "
	150	"Revision 0x%x has a known ACPI BIOS problem.\n",
	151	acpi_blacklist[i].oem_id,
	152	acpi_blacklist[i].oem_table_id,
	153	acpi_blacklist[i].oem_revision);
	154
	155	printk(KERN_ERR PREFIX
	156	"Reason: %s. This is a %s error\n",
	157	acpi_blacklist[i].reason,
	158	(acpi_blacklist[i].
	159	is_critical_error ? "non-recoverable" :
	160	"recoverable"));
1da177e4 LT	161
	162	blacklisted = acpi_blacklist[i].is_critical_error;
	163	break;
4be44fcd	164	} else {
1da177e4 LT	165	i++;
	166	}
	167	}
	168
	169	blacklisted += blacklist_by_year();
	170
d4b7dc49 LB	171	dmi_check_system(acpi_osi_dmi_table);
d4b7dc49 LB	172
1da177e4 LT	173	return blacklisted;
1da177e4 LT	174	}
d4b7dc49 LB	175	#ifdef CONFIG_DMI
	176	static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
	177	{}
	178	};
	179
	180	#endif /* CONFIG_DMI */