apm_32.c

linux 内核源代码

}

#ifndef MODULE
static int __init apm_setup(char *str)
{
	int	invert;

	while ((str != NULL) && (*str != '\0')) {
		if (strncmp(str, "off", 3) == 0)
			apm_disabled = 1;
		if (strncmp(str, "on", 2) == 0)
			apm_disabled = 0;
		if ((strncmp(str, "bounce-interval=", 16) == 0) ||
		    (strncmp(str, "bounce_interval=", 16) == 0))
			bounce_interval = simple_strtol(str + 16, NULL, 0);
		if ((strncmp(str, "idle-threshold=", 15) == 0) ||
		    (strncmp(str, "idle_threshold=", 15) == 0))
			idle_threshold = simple_strtol(str + 15, NULL, 0);
		if ((strncmp(str, "idle-period=", 12) == 0) ||
		    (strncmp(str, "idle_period=", 12) == 0))
			idle_period = simple_strtol(str + 12, NULL, 0);
		invert = (strncmp(str, "no-", 3) == 0) ||
			(strncmp(str, "no_", 3) == 0);
		if (invert)
			str += 3;
		if (strncmp(str, "debug", 5) == 0)
			debug = !invert;
		if ((strncmp(str, "power-off", 9) == 0) ||
		    (strncmp(str, "power_off", 9) == 0))
			power_off = !invert;
		if (strncmp(str, "smp", 3) == 0)
		{
			smp = !invert;
			idle_threshold = 100;
		}
		if ((strncmp(str, "allow-ints", 10) == 0) ||
		    (strncmp(str, "allow_ints", 10) == 0))
 			apm_info.allow_ints = !invert;
		if ((strncmp(str, "broken-psr", 10) == 0) ||
		    (strncmp(str, "broken_psr", 10) == 0))
			apm_info.get_power_status_broken = !invert;
		if ((strncmp(str, "realmode-power-off", 18) == 0) ||
		    (strncmp(str, "realmode_power_off", 18) == 0))
			apm_info.realmode_power_off = !invert;
		str = strchr(str, ',');
		if (str != NULL)
			str += strspn(str, ", \t");
	}
	return 1;
}

__setup("apm=", apm_setup);
#endif

static const struct file_operations apm_bios_fops = {
	.owner		= THIS_MODULE,
	.read		= do_read,
	.poll		= do_poll,
	.ioctl		= do_ioctl,
	.open		= do_open,
	.release	= do_release,
};

static struct miscdevice apm_device = {
	APM_MINOR_DEV,
	"apm_bios",
	&apm_bios_fops
};


/* Simple "print if true" callback */
static int __init print_if_true(const struct dmi_system_id *d)
{
	printk("%s\n", d->ident);
	return 0;
}

/*
 * Some Bioses enable the PS/2 mouse (touchpad) at resume, even if it was
 * disabled before the suspend. Linux used to get terribly confused by that.
 */
static int __init broken_ps2_resume(const struct dmi_system_id *d)
{
	printk(KERN_INFO "%s machine detected. Mousepad Resume Bug workaround hopefully not needed.\n", d->ident);
	return 0;
}

/* Some bioses have a broken protected mode poweroff and need to use realmode */
static int __init set_realmode_power_off(const struct dmi_system_id *d)
{
	if (apm_info.realmode_power_off == 0) {
		apm_info.realmode_power_off = 1;
		printk(KERN_INFO "%s bios detected. Using realmode poweroff only.\n", d->ident);
	}
	return 0;
}

/* Some laptops require interrupts to be enabled during APM calls */
static int __init set_apm_ints(const struct dmi_system_id *d)
{
	if (apm_info.allow_ints == 0) {
		apm_info.allow_ints = 1;
		printk(KERN_INFO "%s machine detected. Enabling interrupts during APM calls.\n", d->ident);
	}
	return 0;
}

/* Some APM bioses corrupt memory or just plain do not work */
static int __init apm_is_horked(const struct dmi_system_id *d)
{
	if (apm_info.disabled == 0) {
		apm_info.disabled = 1;
		printk(KERN_INFO "%s machine detected. Disabling APM.\n", d->ident);
	}
	return 0;
}

static int __init apm_is_horked_d850md(const struct dmi_system_id *d)
{
	if (apm_info.disabled == 0) {
		apm_info.disabled = 1;
		printk(KERN_INFO "%s machine detected. Disabling APM.\n", d->ident);
		printk(KERN_INFO "This bug is fixed in bios P15 which is available for \n");
		printk(KERN_INFO "download from support.intel.com \n");
	}
	return 0;
}

/* Some APM bioses hang on APM idle calls */
static int __init apm_likes_to_melt(const struct dmi_system_id *d)
{
	if (apm_info.forbid_idle == 0) {
		apm_info.forbid_idle = 1;
		printk(KERN_INFO "%s machine detected. Disabling APM idle calls.\n", d->ident);
	}
	return 0;
}

/*
 *  Check for clue free BIOS implementations who use
 *  the following QA technique
 *
 *      [ Write BIOS Code ]<------
 *               |                ^
 *      < Does it Compile >----N--
 *               |Y               ^
 *	< Does it Boot Win98 >-N--
 *               |Y
 *           [Ship It]
 *
 *	Phoenix A04  08/24/2000 is known bad (Dell Inspiron 5000e)
 *	Phoenix A07  09/29/2000 is known good (Dell Inspiron 5000)
 */
static int __init broken_apm_power(const struct dmi_system_id *d)
{
	apm_info.get_power_status_broken = 1;
	printk(KERN_WARNING "BIOS strings suggest APM bugs, disabling power status reporting.\n");
	return 0;
}

/*
 * This bios swaps the APM minute reporting bytes over (Many sony laptops
 * have this problem).
 */
static int __init swab_apm_power_in_minutes(const struct dmi_system_id *d)
{
	apm_info.get_power_status_swabinminutes = 1;
	printk(KERN_WARNING "BIOS strings suggest APM reports battery life in minutes and wrong byte order.\n");
	return 0;
}

static struct dmi_system_id __initdata apm_dmi_table[] = {
	{
		print_if_true,
		KERN_WARNING "IBM T23 - BIOS 1.03b+ and controller firmware 1.02+ may be needed for Linux APM.",
		{	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
			DMI_MATCH(DMI_BIOS_VERSION, "1AET38WW (1.01b)"), },
	},
	{	/* Handle problems with APM on the C600 */
		broken_ps2_resume, "Dell Latitude C600",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C600"), },
	},
	{	/* Allow interrupts during suspend on Dell Latitude laptops*/
		set_apm_ints, "Dell Latitude",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C510"), }
	},
	{	/* APM crashes */
		apm_is_horked, "Dell Inspiron 2500",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
			DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
	},
	{	/* Allow interrupts during suspend on Dell Inspiron laptops*/
		set_apm_ints, "Dell Inspiron", {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 4000"), },
	},
	{	/* Handle problems with APM on Inspiron 5000e */
		broken_apm_power, "Dell Inspiron 5000e",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "A04"),
			DMI_MATCH(DMI_BIOS_DATE, "08/24/2000"), },
	},
	{	/* Handle problems with APM on Inspiron 2500 */
		broken_apm_power, "Dell Inspiron 2500",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "A12"),
			DMI_MATCH(DMI_BIOS_DATE, "02/04/2002"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Dell Dimension 4100",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"),
			DMI_MATCH(DMI_BIOS_VENDOR,"Intel Corp."),
			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
	},
	{	/* Allow interrupts during suspend on Compaq Laptops*/
		set_apm_ints, "Compaq 12XL125",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Compaq PC"),
			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION,"4.06"), },
	},
	{	/* Allow interrupts during APM or the clock goes slow */
		set_apm_ints, "ASUSTeK",
		{	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "L8400K series Notebook PC"), },
	},
	{	/* APM blows on shutdown */
		apm_is_horked, "ABIT KX7-333[R]",
		{	DMI_MATCH(DMI_BOARD_VENDOR, "ABIT"),
			DMI_MATCH(DMI_BOARD_NAME, "VT8367-8233A (KX7-333[R])"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Trigem Delhi3",
		{	DMI_MATCH(DMI_SYS_VENDOR, "TriGem Computer, Inc"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Delhi3"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Fujitsu-Siemens",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "hoenix/FUJITSU SIEMENS"),
			DMI_MATCH(DMI_BIOS_VERSION, "Version1.01"), },
	},
	{	/* APM crashes */
		apm_is_horked_d850md, "Intel D850MD",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
			DMI_MATCH(DMI_BIOS_VERSION, "MV85010A.86A.0016.P07.0201251536"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Intel D810EMO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
			DMI_MATCH(DMI_BIOS_VERSION, "MO81010A.86A.0008.P04.0004170800"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Dell XPS-Z",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
			DMI_MATCH(DMI_BIOS_VERSION, "A11"),
			DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Sharp PC-PJ/AX",
		{	DMI_MATCH(DMI_SYS_VENDOR, "SHARP"),
			DMI_MATCH(DMI_PRODUCT_NAME, "PC-PJ/AX"),
			DMI_MATCH(DMI_BIOS_VENDOR,"SystemSoft"),
			DMI_MATCH(DMI_BIOS_VERSION,"Version R2.08"), },
	},
	{	/* APM crashes */
		apm_is_horked, "Dell Inspiron 2500",
		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
			DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
	},
	{	/* APM idle hangs */
		apm_likes_to_melt, "Jabil AMD",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
			DMI_MATCH(DMI_BIOS_VERSION, "0AASNP06"), },
	},
	{	/* APM idle hangs */
		apm_likes_to_melt, "AMI Bios",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
			DMI_MATCH(DMI_BIOS_VERSION, "0AASNP05"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-N505X(DE) */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0206H"),
			DMI_MATCH(DMI_BIOS_DATE, "08/23/99"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-N505VX */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "W2K06H0"),
			DMI_MATCH(DMI_BIOS_DATE, "02/03/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-XG29 */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0117A0"),
			DMI_MATCH(DMI_BIOS_DATE, "04/25/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z600NE */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0121Z1"),
			DMI_MATCH(DMI_BIOS_DATE, "05/11/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z600NE */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "WME01Z1"),
			DMI_MATCH(DMI_BIOS_DATE, "08/11/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z600LEK(DE) */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0206Z3"),
			DMI_MATCH(DMI_BIOS_DATE, "12/25/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0203D0"),
			DMI_MATCH(DMI_BIOS_DATE, "05/12/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0203Z3"),
			DMI_MATCH(DMI_BIOS_DATE, "08/25/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS (with updated BIOS) */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0209Z3"),
			DMI_MATCH(DMI_BIOS_DATE, "05/12/01"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-F104K */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0204K2"),
			DMI_MATCH(DMI_BIOS_DATE, "08/28/00"), },
	},

	{	/* Handle problems with APM on Sony Vaio PCG-C1VN/C1VE */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0208P1"),
			DMI_MATCH(DMI_BIOS_DATE, "11/09/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-C1VE */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "R0204P1"),
			DMI_MATCH(DMI_BIOS_DATE, "09/12/00"), },
	},
	{	/* Handle problems with APM on Sony Vaio PCG-C1VE */
		swab_apm_power_in_minutes, "Sony VAIO",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
			DMI_MATCH(DMI_BIOS_VERSION, "WXPO1Z3"),
			DMI_MATCH(DMI_BIOS_DATE, "10/26/01"), },
	},
	{	/* broken PM poweroff bios */
		set_realmode_power_off, "Award Software v4.60 PGMA",
		{	DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."),
			DMI_MATCH(DMI_BIOS_VERSION, "4.60 PGMA"),
			DMI_MATCH(DMI_BIOS_DATE, "134526184"), },
	},

	/* Generic per vendor APM settings  */

	{	/* Allow interrupts during suspend on IBM laptops */
		set_apm_ints, "IBM",
		{	DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
	},

	{ }
};

/*
 * Just start the APM thread. We do NOT want to do APM BIOS
 * calls from anything but the APM thread, if for no other reason
 * than the fact that we don't trust the APM BIOS. This way,
 * most common APM BIOS problems that lead to protection errors
 * etc will have at least some level of being contained...
 *
 * In short, if something bad happens, at least we have a choice
 * of just killing the apm thread..
 */
static int __init apm_init(void)
{
	struct proc_dir_entry *apm_proc;
	struct desc_struct *gdt;
	int err;

	dmi_check_system(apm_dmi_table);

	if (apm_info.bios.version == 0 || paravirt_enabled()) {
		printk(KERN_INFO "apm: BIOS not found.\n");
		return -ENODEV;
	}
	printk(KERN_INFO
		"apm: BIOS version %d.%d Flags 0x%02x (Driver version %s)\n",
		((apm_info.bios.version >> 8) & 0xff),
		(apm_info.bios.version & 0xff),
		apm_info.bios.flags,
		driver_version);
	if ((apm_info.bios.flags & APM_32_BIT_SUPPORT) == 0) {
		printk(KERN_INFO "apm: no 32 bit BIOS support\n");
		return -ENODEV;
	}

	if (allow_ints)
		apm_info.allow_ints = 1;
	if (broken_psr)
		apm_info.get_power_status_broken = 1;
	if (realmode_power_off)
		apm_info.realmode_power_off = 1;
	/* User can override, but default is to trust DMI */
	if (apm_disabled != -1)
		apm_info.disabled = apm_disabled;

	/*
	 * Fix for the Compaq Contura 3/25c which reports BIOS version 0.1
	 * but is reportedly a 1.0 BIOS.
	 */
	if (apm_info.bios.version == 0x001)
		apm_info.bios.version = 0x100;

	/* BIOS < 1.2 doesn't set cseg_16_len */
	if (apm_info.bios.version < 0x102)
		apm_info.bios.cseg_16_len = 0; /* 64k */

	if (debug) {
		printk(KERN_INFO "apm: entry %x:%x cseg16 %x dseg %x",
			apm_info.bios.cseg, apm_info.bios.offset,
			apm_info.bios.cseg_16, apm_info.bios.dseg);
		if (apm_info.bios.version > 0x100)
			printk(" cseg len %x, dseg len %x",
				apm_info.bios.cseg_len,
				apm_info.bios.dseg_len);
		if (apm_info.bios.version > 0x101)
			printk(" cseg16 len %x", apm