[deliverable/linux.git] / drivers / leds / leds-hp-disk.c

/*
 *  leds-hp-disk.c - driver for HP "hard disk protection" LED
 *
 *  Copyright (C) 2008 Pavel Machek
 *
 *  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/init.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/kthread.h>
#include <linux/leds.h>
#include <acpi/acpi_drivers.h>

#define DRIVER_NAME     "leds-hp-disk"
#define ACPI_MDPS_CLASS "led"

/* For automatic insertion of the module */
static struct acpi_device_id hpled_device_ids[] = {
	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, hpled_device_ids);

struct acpi_hpled {
	struct acpi_device	*device;   /* The ACPI device */
};

static struct acpi_hpled adev;

static acpi_status hpled_acpi_write(acpi_handle handle, int reg)
{
	unsigned long long ret; /* Not used when writing */
	union acpi_object in_obj[1];
	struct acpi_object_list args = { 1, in_obj };

	in_obj[0].type          = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = reg;

	return acpi_evaluate_integer(handle, "ALED", &args, &ret);
}

static void hpled_set(struct led_classdev *led_cdev,
			       enum led_brightness value)
{
	hpled_acpi_write(adev.device->handle, !!value);
}

static struct led_classdev hpled_led = {
	.name			= "hp:red:hddprotection",
	.default_trigger	= "heartbeat",
	.brightness_set		= hpled_set,
};

#ifdef CONFIG_PM
static int hpled_suspend(struct acpi_device *dev, pm_message_t state)
{
	led_classdev_suspend(&hpled_led);
	return 0;
}

static int hpled_resume(struct acpi_device *dev)
{
	led_classdev_resume(&hpled_led);
	return 0;
}
#else
#define hpled_suspend NULL
#define hpled_resume NULL
#endif

static int hpled_add(struct acpi_device *device)
{
	int ret;

	if (!device)
		return -EINVAL;

	adev.device = device;
	strcpy(acpi_device_name(device), DRIVER_NAME);
	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
	device->driver_data = &adev;

	ret = led_classdev_register(NULL, &hpled_led);
	return ret;
}

static int hpled_remove(struct acpi_device *device, int type)
{
	if (!device)
		return -EINVAL;

	led_classdev_unregister(&hpled_led);
	return 0;
}


static struct acpi_driver leds_hp_driver = {
	.name  = DRIVER_NAME,
	.class = ACPI_MDPS_CLASS,
	.ids   = hpled_device_ids,
	.ops = {
		.add     = hpled_add,
		.remove  = hpled_remove,
		.suspend = hpled_suspend,
		.resume  = hpled_resume,
	}
};

static int __init hpled_init_module(void)
{
	int ret;

	if (acpi_disabled)
		return -ENODEV;

	ret = acpi_bus_register_driver(&leds_hp_driver);
	if (ret < 0)
		return ret;

	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");

	return 0;
}

static void __exit hpled_exit_module(void)
{
	acpi_bus_unregister_driver(&leds_hp_driver);
}

MODULE_DESCRIPTION("Driver for HP disk protection LED");
MODULE_AUTHOR("Pavel Machek <pavel@suse.cz>");
MODULE_LICENSE("GPL");

module_init(hpled_init_module);
module_exit(hpled_exit_module);
Commit	Line	Data
9c78ff6e PM	1	/*
	2	* leds-hp-disk.c - driver for HP "hard disk protection" LED
	3	*
	4	* Copyright (C) 2008 Pavel Machek
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/init.h>
	23	#include <linux/dmi.h>
	24	#include <linux/module.h>
	25	#include <linux/types.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/interrupt.h>
	28	#include <linux/input.h>
	29	#include <linux/kthread.h>
9c78ff6e PM	30	#include <linux/leds.h>
	31	#include <acpi/acpi_drivers.h>
	32
	33	#define DRIVER_NAME "leds-hp-disk"
	34	#define ACPI_MDPS_CLASS "led"
	35
	36	/* For automatic insertion of the module */
	37	static struct acpi_device_id hpled_device_ids[] = {
	38	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
	39	{"", 0},
	40	};
	41	MODULE_DEVICE_TABLE(acpi, hpled_device_ids);
	42
	43	struct acpi_hpled {
	44	struct acpi_device device; / The ACPI device */
	45	};
	46
	47	static struct acpi_hpled adev;
	48
	49	static acpi_status hpled_acpi_write(acpi_handle handle, int reg)
	50	{
438f8de4	51	unsigned long long ret; /* Not used when writing */
9c78ff6e PM	52	union acpi_object in_obj[1];
	53	struct acpi_object_list args = { 1, in_obj };
	54
	55	in_obj[0].type = ACPI_TYPE_INTEGER;
	56	in_obj[0].integer.value = reg;
	57
	58	return acpi_evaluate_integer(handle, "ALED", &args, &ret);
	59	}
	60
	61	static void hpled_set(struct led_classdev *led_cdev,
	62	enum led_brightness value)
	63	{
	64	hpled_acpi_write(adev.device->handle, !!value);
	65	}
	66
	67	static struct led_classdev hpled_led = {
	68	.name = "hp:red:hddprotection",
	69	.default_trigger = "heartbeat",
	70	.brightness_set = hpled_set,
	71	};
	72
	73	#ifdef CONFIG_PM
	74	static int hpled_suspend(struct acpi_device *dev, pm_message_t state)
	75	{
	76	led_classdev_suspend(&hpled_led);
	77	return 0;
	78	}
	79
	80	static int hpled_resume(struct acpi_device *dev)
	81	{
	82	led_classdev_resume(&hpled_led);
	83	return 0;
	84	}
	85	#else
	86	#define hpled_suspend NULL
	87	#define hpled_resume NULL
	88	#endif
	89
	90	static int hpled_add(struct acpi_device *device)
	91	{
	92	int ret;
	93
	94	if (!device)
	95	return -EINVAL;
	96
	97	adev.device = device;
	98	strcpy(acpi_device_name(device), DRIVER_NAME);
	99	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
601a1b92	100	device->driver_data = &adev;
9c78ff6e PM	101
	102	ret = led_classdev_register(NULL, &hpled_led);
	103	return ret;
	104	}
	105
	106	static int hpled_remove(struct acpi_device *device, int type)
	107	{
	108	if (!device)
	109	return -EINVAL;
	110
	111	led_classdev_unregister(&hpled_led);
	112	return 0;
	113	}
	114
	115
	116
	117	static struct acpi_driver leds_hp_driver = {
	118	.name = DRIVER_NAME,
	119	.class = ACPI_MDPS_CLASS,
	120	.ids = hpled_device_ids,
	121	.ops = {
	122	.add = hpled_add,
	123	.remove = hpled_remove,
	124	.suspend = hpled_suspend,
	125	.resume = hpled_resume,
	126	}
	127	};
	128
	129	static int __init hpled_init_module(void)
	130	{
	131	int ret;
	132
	133	if (acpi_disabled)
	134	return -ENODEV;
	135
	136	ret = acpi_bus_register_driver(&leds_hp_driver);
	137	if (ret < 0)
	138	return ret;
	139
	140	printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
	141
	142	return 0;
	143	}
	144
	145	static void __exit hpled_exit_module(void)
	146	{
	147	acpi_bus_unregister_driver(&leds_hp_driver);
	148	}
	149
	150	MODULE_DESCRIPTION("Driver for HP disk protection LED");
	151	MODULE_AUTHOR("Pavel Machek <pavel@suse.cz>");
	152	MODULE_LICENSE("GPL");
	153
	154	module_init(hpled_init_module);
	155	module_exit(hpled_exit_module);