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

// SPDX-License-Identifier: GPL-2.0-only
#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 const struct dmi_system_id clevo_mail_led_dmi_table[] __initconst = {
	{
		.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 void clevo_mail_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&clevo_mail_led);
}

static struct platform_driver clevo_mail_led_driver = {
	.remove_new	= 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
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
5c6f844c	2	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
cec035de MN	3
	4	#include <linux/module.h>
	5
	6	#include <linux/platform_device.h>
	7	#include <linux/err.h>
	8	#include <linux/leds.h>
	9
	10	#include <linux/io.h>
	11	#include <linux/dmi.h>
	12
	13	#include <linux/i8042.h>
	14
	15	#define CLEVO_MAIL_LED_OFF 0x0084
	16	#define CLEVO_MAIL_LED_BLINK_1HZ 0x008A
	17	#define CLEVO_MAIL_LED_BLINK_0_5HZ 0x0083
	18
4d404fd5	19	MODULE_AUTHOR("Márton Németh <nm127@freemail.hu>");
cec035de MN	20	MODULE_DESCRIPTION("Clevo mail LED driver");
	21	MODULE_LICENSE("GPL");
	22
aad0f292	23	static bool nodetect;
cec035de MN	24	module_param_named(nodetect, nodetect, bool, 0);
	25	MODULE_PARM_DESC(nodetect, "Skip DMI hardware detection");
	26
	27	static struct platform_device *pdev;
	28
	29	static int __init clevo_mail_led_dmi_callback(const struct dmi_system_id *id)
	30	{
5c6f844c	31	pr_info("'%s' found\n", id->ident);
cec035de MN	32	return 1;
	33	}
	34
	35	/*
96f09791	36	* struct clevo_mail_led_dmi_table - List of known good models
cec035de MN	37	*
	38	* Contains the known good models this driver is compatible with.
	39	* When adding a new model try to be as strict as possible. This
	40	* makes it possible to keep the false positives (the model is
	41	* detected as working, but in reality it is not) as low as
	42	* possible.
	43	*/
6faadbbb	44	static const struct dmi_system_id clevo_mail_led_dmi_table[] __initconst = {
cec035de MN	45	{
	46	.callback = clevo_mail_led_dmi_callback,
	47	.ident = "Clevo D410J",
	48	.matches = {
	49	DMI_MATCH(DMI_SYS_VENDOR, "VIA"),
	50	DMI_MATCH(DMI_PRODUCT_NAME, "K8N800"),
	51	DMI_MATCH(DMI_PRODUCT_VERSION, "VT8204B")
	52	}
	53	},
	54	{
	55	.callback = clevo_mail_led_dmi_callback,
	56	.ident = "Clevo M5x0N",
	57	.matches = {
	58	DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
	59	DMI_MATCH(DMI_PRODUCT_NAME, "M5x0N")
	60	}
	61	},
	62	{
	63	.callback = clevo_mail_led_dmi_callback,
ee539a93	64	.ident = "Clevo M5x0V",
cec035de MN	65	.matches = {
	66	DMI_MATCH(DMI_BOARD_VENDOR, "CLEVO Co. "),
	67	DMI_MATCH(DMI_BOARD_NAME, "M5X0V "),
cec035de MN	68	DMI_MATCH(DMI_PRODUCT_VERSION, "VT6198")
	69	}
	70	},
b3ba31f8 MN	71	{
	72	.callback = clevo_mail_led_dmi_callback,
	73	.ident = "Clevo D400P",
	74	.matches = {
	75	DMI_MATCH(DMI_BOARD_VENDOR, "Clevo"),
	76	DMI_MATCH(DMI_BOARD_NAME, "D400P"),
	77	DMI_MATCH(DMI_BOARD_VERSION, "Rev.A"),
	78	DMI_MATCH(DMI_PRODUCT_VERSION, "0106")
	79	}
	80	},
cec035de MN	81	{
	82	.callback = clevo_mail_led_dmi_callback,
	83	.ident = "Clevo D410V",
	84	.matches = {
	85	DMI_MATCH(DMI_BOARD_VENDOR, "Clevo, Co."),
	86	DMI_MATCH(DMI_BOARD_NAME, "D400V/D470V"),
	87	DMI_MATCH(DMI_BOARD_VERSION, "SS78B"),
	88	DMI_MATCH(DMI_PRODUCT_VERSION, "Rev. A1")
	89	}
	90	},
	91	{ }
	92	};
96f09791	93	MODULE_DEVICE_TABLE(dmi, clevo_mail_led_dmi_table);
cec035de MN	94
	95	static void clevo_mail_led_set(struct led_classdev *led_cdev,
	96	enum led_brightness value)
	97	{
181d683d DT	98	i8042_lock_chip();
181d683d DT	99
cec035de MN	100	if (value == LED_OFF)
	101	i8042_command(NULL, CLEVO_MAIL_LED_OFF);
	102	else if (value <= LED_HALF)
	103	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	104	else
	105	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
	106
181d683d DT	107	i8042_unlock_chip();
181d683d DT	108
cec035de MN	109	}
cec035de MN	110
92e015cb	111	static int clevo_mail_led_blink(struct led_classdev *led_cdev,
4d404fd5 NM	112	unsigned long *delay_on,
4d404fd5 NM	113	unsigned long *delay_off)
92e015cb MN	114	{
	115	int status = -EINVAL;
	116
181d683d DT	117	i8042_lock_chip();
181d683d DT	118
92e015cb MN	119	if (delay_on == 0 / ms / && delay_off == 0 /* ms */) {
	120	/* Special case: the leds subsystem requested us to
	121	* chose one user friendly blinking of the LED, and
	122	* start it. Let's blink the led slowly (0.5Hz).
	123	*/
	124	delay_on = 1000; / ms */
	125	delay_off = 1000; / ms */
	126	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	127	status = 0;
	128
	129	} else if (delay_on == 500 / ms / && delay_off == 500 /* ms */) {
	130	/* blink the led with 1Hz */
	131	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
	132	status = 0;
	133
	134	} else if (delay_on == 1000 / ms / && delay_off == 1000 /* ms */) {
	135	/* blink the led with 0.5Hz */
	136	i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
	137	status = 0;
	138
	139	} else {
5c6f844c	140	pr_debug("clevo_mail_led_blink(..., %lu, %lu),"
92e015cb MN	141	" returning -EINVAL (unsupported)\n",
	142	delay_on, delay_off);
	143	}
	144
181d683d DT	145	i8042_unlock_chip();
181d683d DT	146
92e015cb MN	147	return status;
	148	}
	149
cec035de	150	static struct led_classdev clevo_mail_led = {
6c152bee	151	.name = "clevo::mail",
cec035de	152	.brightness_set = clevo_mail_led_set,
92e015cb	153	.blink_set = clevo_mail_led_blink,
859cb7f2	154	.flags = LED_CORE_SUSPENDRESUME,
cec035de MN	155	};
cec035de MN	156
0016db26	157	static int __init clevo_mail_led_probe(struct platform_device *pdev)
cec035de MN	158	{
	159	return led_classdev_register(&pdev->dev, &clevo_mail_led);
	160	}
	161
60613020	162	static void clevo_mail_led_remove(struct platform_device *pdev)
cec035de MN	163	{
cec035de MN	164	led_classdev_unregister(&clevo_mail_led);
cec035de MN	165	}
cec035de MN	166
cec035de	167	static struct platform_driver clevo_mail_led_driver = {
60613020	168	.remove_new = 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);