[linux-2.6-block.git] / drivers / leds / leds-clevo-mail.c

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>

#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/leds.h>

#include <linux/io.h>
#include <linux/dmi.h>

#include <linux/i8042.h>

#define CLEVO_MAIL_LED_OFF		0x0084
#define CLEVO_MAIL_LED_BLINK_1HZ	0x008A
#define CLEVO_MAIL_LED_BLINK_0_5HZ	0x0083

MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
MODULE_DESCRIPTION("Clevo mail LED driver");
MODULE_LICENSE("GPL");

static bool nodetect;
module_param_named(nodetect, nodetect, bool, 0);
MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");

static struct platform_device *pdev;

static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
{
	pr_info("'%s' found\n", id->ident);
	return 1;
}

/*
 * struct clevo_mail_led_dmi_table - List of known good models
 *
 * Contains the known good models this driver is compatible with.
 * When adding a new model try to be as strict as possible. This
 * makes it possible to keep the false positives (the model is
 * detected as working, but in reality it is not) as low as
 * possible.
 */
static struct dmi_system_id clevo_mail_led_dmi_table[] __initdata = {
	{
		.callback = clevo_mail_led_dmi_callback,
		.ident = "Clevo D410J",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
			DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
		}
	},
	{
		.callback = clevo_mail_led_dmi_callback,
		.ident = "Clevo M5x0N",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
			DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
		}
	},
	{
		.callback = clevo_mail_led_dmi_callback,
		.ident = "Clevo M5x0V",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
			DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
			DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
		}
	},
	{
		.callback = clevo_mail_led_dmi_callback,
		.ident = "Clevo D400P",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"),
			DMI_MATCH(DMI_BOARD_NAME, "D400P"),
			DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "0106")
		}
	},
	{
		.callback = clevo_mail_led_dmi_callback,
		.ident = "Clevo D410V",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."),
			DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"),
			DMI_MATCH(DMI_BOARD_VERSION, "SS78B"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1")
		}
	},
	{ }
};
MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);

static void clevo_mail_led_set(struct led_classdev *led_cdev,
				enum led_brightness value)
{
	i8042_lock_chip();

	if (value == LED_OFF)
		i8042_command(NULL, CLEVO_MAIL_LED_OFF);
	else if (value <= LED_HALF)
		i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	else
		i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);

	i8042_unlock_chip();

}

static int clevo_mail_led_blink(struct led_classdev *led_cdev,
				unsigned long *delay_on,
				unsigned long *delay_off)
{
	int status = -EINVAL;

	i8042_lock_chip();

	if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) {
		/* Special case: the leds subsystem requested us to
		 * chose one user friendly blinking of the LED, and
		 * start it. Let's blink the led slowly (0.5Hz).
		 */
		*delay_on = 1000; /* ms */
		*delay_off = 1000; /* ms */
		i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
		status = 0;

	} else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) {
		/* blink the led with 1Hz */
		i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
		status = 0;

	} else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) {
		/* blink the led with 0.5Hz */
		i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
		status = 0;

	} else {
		pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
		       " returning -EINVAL (unsupported)\n",
		       *delay_on, *delay_off);
	}

	i8042_unlock_chip();

	return status;
}

static struct led_classdev clevo_mail_led = {
	.name			= "clevo::mail",
	.brightness_set		= clevo_mail_led_set,
	.blink_set		= clevo_mail_led_blink,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static int __init clevo_mail_led_probe(struct platform_device *pdev)
{
	return led_classdev_register(&pdev->dev, &clevo_mail_led);
}

static int clevo_mail_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&clevo_mail_led);
	return 0;
}

static struct platform_driver clevo_mail_led_driver = {
	.remove		= clevo_mail_led_remove,
	.driver		= {
		.name		= KBUILD_MODNAME,
	},
};

static int __init clevo_mail_led_init(void)
{
	int error = 0;
	int count = 0;

	/* Check with the help of DMI if we are running on supported hardware */
	if (!nodetect) {
		count = dmi_check_system(clevo_mail_led_dmi_table);
	} else {
		count = 1;
		pr_err("Skipping DMI detection. "
		       "If the driver works on your hardware please "
		       "report model and the output of dmidecode in tracker "
		       "at http://sourceforge.net/projects/clevo-mailled/\n");
	}

	if (!count)
		return -ENODEV;

	pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
	if (!IS_ERR(pdev)) {
		error = platform_driver_probe(&clevo_mail_led_driver,
					      clevo_mail_led_probe);
		if (error) {
			pr_err("Can't probe platform driver\n");
			platform_device_unregister(pdev);
		}
	} else
		error = PTR_ERR(pdev);

	return error;
}

static void __exit clevo_mail_led_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&clevo_mail_led_driver);

	clevo_mail_led_set(NULL, LED_OFF);
}

module_init(clevo_mail_led_init);
module_exit(clevo_mail_led_exit);
Commit	Line	Data
5c6f844c	1	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
cec035de MN	2
	3	#include <linux/module.h>
	4
	5	#include <linux/platform_device.h>
	6	#include <linux/err.h>
	7	#include <linux/leds.h>
	8
	9	#include <linux/io.h>
	10	#include <linux/dmi.h>
	11
	12	#include <linux/i8042.h>
	13
	14	#define CLEVO_MAIL_LED_OFF 0x0084
	15	#define CLEVO_MAIL_LED_BLINK_1HZ 0x008A
	16	#define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083
	17
4d404fd5	18	MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
cec035de MN	19	MODULE_DESCRIPTION("Clevo mail LED driver");
	20	MODULE_LICENSE("GPL");
	21
aad0f292	22	static bool nodetect;
cec035de MN	23	module_param_named(nodetect, nodetect, bool, 0);
	24	MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
	25
	26	static struct platform_device *pdev;
	27
	28	static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
	29	{
5c6f844c	30	pr_info("'%s' found\n", id->ident);
cec035de MN	31	return 1;
	32	}
	33
	34	/*
96f09791	35	* struct clevo_mail_led_dmi_table - List of known good models
cec035de MN	36	*
	37	* Contains the known good models this driver is compatible with.
	38	* When adding a new model try to be as strict as possible. This
	39	* makes it possible to keep the false positives (the model is
	40	* detected as working, but in reality it is not) as low as
	41	* possible.
	42	*/
939086ea	43	static struct dmi_system_id clevo_mail_led_dmi_table[] __initdata = {
cec035de MN	44	{
	45	.callback = clevo_mail_led_dmi_callback,
	46	.ident = "Clevo D410J",
	47	.matches = {
	48	DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
	49	DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
	50	DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
	51	}
	52	},
	53	{
	54	.callback = clevo_mail_led_dmi_callback,
	55	.ident = "Clevo M5x0N",
	56	.matches = {
	57	DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
	58	DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
	59	}
	60	},
	61	{
	62	.callback = clevo_mail_led_dmi_callback,
ee539a93	63	.ident = "Clevo M5x0V",
cec035de MN	64	.matches = {
	65	DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
	66	DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
cec035de MN	67	DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
	68	}
	69	},
b3ba31f8 MN	70	{
	71	.callback = clevo_mail_led_dmi_callback,
	72	.ident = "Clevo D400P",
	73	.matches = {
	74	DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"),
	75	DMI_MATCH(DMI_BOARD_NAME, "D400P"),
	76	DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"),
	77	DMI_MATCH(DMI_PRODUCT_VERSION, "0106")
	78	}
	79	},
cec035de MN	80	{
	81	.callback = clevo_mail_led_dmi_callback,
	82	.ident = "Clevo D410V",
	83	.matches = {
	84	DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."),
	85	DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"),
	86	DMI_MATCH(DMI_BOARD_VERSION, "SS78B"),
	87	DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1")
	88	}
	89	},
	90	{ }
	91	};
96f09791	92	MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);
cec035de MN	93
	94	static void clevo_mail_led_set(struct led_classdev *led_cdev,
	95	enum led_brightness value)
	96	{
181d683d DT	97	i8042_lock_chip();
181d683d DT	98
cec035de MN	99	if (value == LED_OFF)
	100	i8042_command(NULL, CLEVO_MAIL_LED_OFF);
	101	else if (value <= LED_HALF)
	102	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	103	else
	104	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
	105
181d683d DT	106	i8042_unlock_chip();
181d683d DT	107
cec035de MN	108	}
cec035de MN	109
92e015cb	110	static int clevo_mail_led_blink(struct led_classdev *led_cdev,
4d404fd5 NM	111	unsigned long *delay_on,
4d404fd5 NM	112	unsigned long *delay_off)
92e015cb MN	113	{
	114	int status = -EINVAL;
	115
181d683d DT	116	i8042_lock_chip();
181d683d DT	117
92e015cb MN	118	if (delay_on == 0 / ms / && delay_off == 0 /* ms */) {
	119	/* Special case: the leds subsystem requested us to
	120	* chose one user friendly blinking of the LED, and
	121	* start it. Let's blink the led slowly (0.5Hz).
	122	*/
	123	delay_on = 1000; / ms */
	124	delay_off = 1000; / ms */
	125	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	126	status = 0;
	127
	128	} else if (delay_on == 500 / ms / && delay_off == 500 /* ms */) {
	129	/* blink the led with 1Hz */
	130	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
	131	status = 0;
	132
	133	} else if (delay_on == 1000 / ms / && delay_off == 1000 /* ms */) {
	134	/* blink the led with 0.5Hz */
	135	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	136	status = 0;
	137
	138	} else {
5c6f844c	139	pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
92e015cb MN	140	" returning -EINVAL (unsupported)\n",
	141	delay_on, delay_off);
	142	}
	143
181d683d DT	144	i8042_unlock_chip();
181d683d DT	145
92e015cb MN	146	return status;
	147	}
	148
cec035de	149	static struct led_classdev clevo_mail_led = {
6c152bee	150	.name = "clevo::mail",
cec035de	151	.brightness_set = clevo_mail_led_set,
92e015cb	152	.blink_set = clevo_mail_led_blink,
859cb7f2	153	.flags = LED_CORE_SUSPENDRESUME,
cec035de MN	154	};
cec035de MN	155
0016db26	156	static int __init clevo_mail_led_probe(struct platform_device *pdev)
cec035de MN	157	{
	158	return led_classdev_register(&pdev->dev, &clevo_mail_led);
	159	}
	160
	161	static int clevo_mail_led_remove(struct platform_device *pdev)
	162	{
	163	led_classdev_unregister(&clevo_mail_led);
	164	return 0;
	165	}
	166
cec035de	167	static struct platform_driver clevo_mail_led_driver = {
cec035de	168	.remove = clevo_mail_led_remove,
cec035de MN	169	.driver = {
	170	.name = KBUILD_MODNAME,
	171	},
	172	};
	173
	174	static int __init clevo_mail_led_init(void)
	175	{
	176	int error = 0;
	177	int count = 0;
	178
	179	/* Check with the help of DMI if we are running on supported hardware */
	180	if (!nodetect) {
96f09791	181	count = dmi_check_system(clevo_mail_led_dmi_table);
cec035de MN	182	} else {
cec035de MN	183	count = 1;
5c6f844c	184	pr_err("Skipping DMI detection. "
cec035de MN	185	"If the driver works on your hardware please "
	186	"report model and the output of dmidecode in tracker "
	187	"at http://sourceforge.net/projects/clevo-mailled/\n");
	188	}
	189
	190	if (!count)
	191	return -ENODEV;
	192
	193	pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
	194	if (!IS_ERR(pdev)) {
	195	error = platform_driver_probe(&clevo_mail_led_driver,
	196	clevo_mail_led_probe);
	197	if (error) {
5c6f844c	198	pr_err("Can't probe platform driver\n");
cec035de MN	199	platform_device_unregister(pdev);
	200	}
	201	} else
	202	error = PTR_ERR(pdev);
	203
	204	return error;
	205	}
	206
	207	static void __exit clevo_mail_led_exit(void)
	208	{
	209	platform_device_unregister(pdev);
	210	platform_driver_unregister(&clevo_mail_led_driver);
	211
	212	clevo_mail_led_set(NULL, LED_OFF);
	213	}
	214
	215	module_init(clevo_mail_led_init);
	216	module_exit(clevo_mail_led_exit);