[linux.git] / drivers / leds / leds-fsg.c

/*
 * LED Driver for the Freecom FSG-3
 *
 * Copyright (c) 2008 Rod Whitby <[email protected]>
 *
 * Author: Rod Whitby <[email protected]>
 *
 * Based on leds-spitz.c
 * Copyright 2005-2006 Openedhand Ltd.
 * Author: Richard Purdie <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <mach/hardware.h>
#include <asm/io.h>

#define FSG_LED_WLAN_BIT	0
#define FSG_LED_WAN_BIT		1
#define FSG_LED_SATA_BIT	2
#define FSG_LED_USB_BIT		4
#define FSG_LED_RING_BIT	5
#define FSG_LED_SYNC_BIT	7

static short __iomem *latch_address;
static unsigned short latch_value;


static void fsg_led_wlan_set(struct led_classdev *led_cdev,
			     enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_WLAN_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_WLAN_BIT);
		*latch_address = latch_value;
	}
}

static void fsg_led_wan_set(struct led_classdev *led_cdev,
			    enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_WAN_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_WAN_BIT);
		*latch_address = latch_value;
	}
}

static void fsg_led_sata_set(struct led_classdev *led_cdev,
			     enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_SATA_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_SATA_BIT);
		*latch_address = latch_value;
	}
}

static void fsg_led_usb_set(struct led_classdev *led_cdev,
			    enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_USB_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_USB_BIT);
		*latch_address = latch_value;
	}
}

static void fsg_led_sync_set(struct led_classdev *led_cdev,
			     enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_SYNC_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_SYNC_BIT);
		*latch_address = latch_value;
	}
}

static void fsg_led_ring_set(struct led_classdev *led_cdev,
			     enum led_brightness value)
{
	if (value) {
		latch_value &= ~(1 << FSG_LED_RING_BIT);
		*latch_address = latch_value;
	} else {
		latch_value |=  (1 << FSG_LED_RING_BIT);
		*latch_address = latch_value;
	}
}


static struct led_classdev fsg_wlan_led = {
	.name			= "fsg:blue:wlan",
	.brightness_set		= fsg_led_wlan_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static struct led_classdev fsg_wan_led = {
	.name			= "fsg:blue:wan",
	.brightness_set		= fsg_led_wan_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static struct led_classdev fsg_sata_led = {
	.name			= "fsg:blue:sata",
	.brightness_set		= fsg_led_sata_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static struct led_classdev fsg_usb_led = {
	.name			= "fsg:blue:usb",
	.brightness_set		= fsg_led_usb_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static struct led_classdev fsg_sync_led = {
	.name			= "fsg:blue:sync",
	.brightness_set		= fsg_led_sync_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};

static struct led_classdev fsg_ring_led = {
	.name			= "fsg:blue:ring",
	.brightness_set		= fsg_led_ring_set,
	.flags			= LED_CORE_SUSPENDRESUME,
};


static int fsg_led_probe(struct platform_device *pdev)
{
	int ret;

	/* Map the LED chip select address space */
	latch_address = (unsigned short *) ioremap(IXP4XX_EXP_BUS_BASE(2), 512);
	if (!latch_address) {
		ret = -ENOMEM;
		goto failremap;
	}

	latch_value = 0xffff;
	*latch_address = latch_value;

	ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
	if (ret < 0)
		goto failwlan;

	ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
	if (ret < 0)
		goto failwan;

	ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
	if (ret < 0)
		goto failsata;

	ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
	if (ret < 0)
		goto failusb;

	ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
	if (ret < 0)
		goto failsync;

	ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
	if (ret < 0)
		goto failring;

	return ret;

 failring:
	led_classdev_unregister(&fsg_sync_led);
 failsync:
	led_classdev_unregister(&fsg_usb_led);
 failusb:
	led_classdev_unregister(&fsg_sata_led);
 failsata:
	led_classdev_unregister(&fsg_wan_led);
 failwan:
	led_classdev_unregister(&fsg_wlan_led);
 failwlan:
	iounmap(latch_address);
 failremap:

	return ret;
}

static int fsg_led_remove(struct platform_device *pdev)
{
	led_classdev_unregister(&fsg_wlan_led);
	led_classdev_unregister(&fsg_wan_led);
	led_classdev_unregister(&fsg_sata_led);
	led_classdev_unregister(&fsg_usb_led);
	led_classdev_unregister(&fsg_sync_led);
	led_classdev_unregister(&fsg_ring_led);

	iounmap(latch_address);

	return 0;
}


static struct platform_driver fsg_led_driver = {
	.probe		= fsg_led_probe,
	.remove		= fsg_led_remove,
	.driver		= {
		.name		= "fsg-led",
	},
};


static int __init fsg_led_init(void)
{
	return platform_driver_register(&fsg_led_driver);
}

static void __exit fsg_led_exit(void)
{
	platform_driver_unregister(&fsg_led_driver);
}


module_init(fsg_led_init);
module_exit(fsg_led_exit);

MODULE_AUTHOR("Rod Whitby <[email protected]>");
MODULE_DESCRIPTION("Freecom FSG-3 LED driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
3b2e46f8 RW	1	/*
	2	* LED Driver for the Freecom FSG-3
	3	*
	4	* Copyright (c) 2008 Rod Whitby <[email protected]>
	5	*
	6	* Author: Rod Whitby <[email protected]>
	7	*
	8	* Based on leds-spitz.c
	9	* Copyright 2005-2006 Openedhand Ltd.
	10	* Author: Richard Purdie <[email protected]>
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/init.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/leds.h>
a09e64fb	22	#include <mach/hardware.h>
3b2e46f8 RW	23	#include <asm/io.h>
3b2e46f8 RW	24
914e7bc2 KH	25	#define FSG_LED_WLAN_BIT 0
	26	#define FSG_LED_WAN_BIT 1
	27	#define FSG_LED_SATA_BIT 2
	28	#define FSG_LED_USB_BIT 4
	29	#define FSG_LED_RING_BIT 5
	30	#define FSG_LED_SYNC_BIT 7
	31
3b2e46f8 RW	32	static short __iomem *latch_address;
	33	static unsigned short latch_value;
	34
	35
	36	static void fsg_led_wlan_set(struct led_classdev *led_cdev,
	37	enum led_brightness value)
	38	{
	39	if (value) {
	40	latch_value &= ~(1 << FSG_LED_WLAN_BIT);
	41	*latch_address = latch_value;
	42	} else {
	43	latch_value \|= (1 << FSG_LED_WLAN_BIT);
	44	*latch_address = latch_value;
	45	}
	46	}
	47
	48	static void fsg_led_wan_set(struct led_classdev *led_cdev,
	49	enum led_brightness value)
	50	{
	51	if (value) {
	52	latch_value &= ~(1 << FSG_LED_WAN_BIT);
	53	*latch_address = latch_value;
	54	} else {
	55	latch_value \|= (1 << FSG_LED_WAN_BIT);
	56	*latch_address = latch_value;
	57	}
	58	}
	59
	60	static void fsg_led_sata_set(struct led_classdev *led_cdev,
	61	enum led_brightness value)
	62	{
	63	if (value) {
	64	latch_value &= ~(1 << FSG_LED_SATA_BIT);
	65	*latch_address = latch_value;
	66	} else {
	67	latch_value \|= (1 << FSG_LED_SATA_BIT);
	68	*latch_address = latch_value;
	69	}
	70	}
	71
	72	static void fsg_led_usb_set(struct led_classdev *led_cdev,
	73	enum led_brightness value)
	74	{
	75	if (value) {
	76	latch_value &= ~(1 << FSG_LED_USB_BIT);
	77	*latch_address = latch_value;
	78	} else {
	79	latch_value \|= (1 << FSG_LED_USB_BIT);
	80	*latch_address = latch_value;
	81	}
	82	}
	83
	84	static void fsg_led_sync_set(struct led_classdev *led_cdev,
	85	enum led_brightness value)
	86	{
	87	if (value) {
	88	latch_value &= ~(1 << FSG_LED_SYNC_BIT);
	89	*latch_address = latch_value;
	90	} else {
	91	latch_value \|= (1 << FSG_LED_SYNC_BIT);
	92	*latch_address = latch_value;
	93	}
	94	}
	95
96	static void fsg_led_ring_set(struct led_classdev *led_cdev,
97	enum led_brightness value)
98	{
99	if (value) {
100	latch_value &= ~(1 << FSG_LED_RING_BIT);
101	*latch_address = latch_value;
102	} else {
103	latch_value \|= (1 << FSG_LED_RING_BIT);
104	*latch_address = latch_value;
105	}
106	}
107
108
3b2e46f8 RW	109	static struct led_classdev fsg_wlan_led = {
	110	.name = "fsg:blue:wlan",
	111	.brightness_set = fsg_led_wlan_set,
859cb7f2	112	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	113	};
	114
	115	static struct led_classdev fsg_wan_led = {
	116	.name = "fsg:blue:wan",
	117	.brightness_set = fsg_led_wan_set,
859cb7f2	118	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	119	};
	120
	121	static struct led_classdev fsg_sata_led = {
	122	.name = "fsg:blue:sata",
	123	.brightness_set = fsg_led_sata_set,
859cb7f2	124	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	125	};
	126
	127	static struct led_classdev fsg_usb_led = {
	128	.name = "fsg:blue:usb",
	129	.brightness_set = fsg_led_usb_set,
859cb7f2	130	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	131	};
	132
	133	static struct led_classdev fsg_sync_led = {
	134	.name = "fsg:blue:sync",
	135	.brightness_set = fsg_led_sync_set,
859cb7f2	136	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	137	};
	138
	139	static struct led_classdev fsg_ring_led = {
	140	.name = "fsg:blue:ring",
	141	.brightness_set = fsg_led_ring_set,
859cb7f2	142	.flags = LED_CORE_SUSPENDRESUME,
3b2e46f8 RW	143	};
	144
	145
3b2e46f8 RW	146	static int fsg_led_probe(struct platform_device *pdev)
	147	{
	148	int ret;
	149
07f696c7 SW	150	/* Map the LED chip select address space */
	151	latch_address = (unsigned short *) ioremap(IXP4XX_EXP_BUS_BASE(2), 512);
	152	if (!latch_address) {
	153	ret = -ENOMEM;
	154	goto failremap;
	155	}
	156
	157	latch_value = 0xffff;
	158	*latch_address = latch_value;
	159
3b2e46f8 RW	160	ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
	161	if (ret < 0)
	162	goto failwlan;
	163
	164	ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
	165	if (ret < 0)
	166	goto failwan;
	167
	168	ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
	169	if (ret < 0)
	170	goto failsata;
	171
	172	ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
	173	if (ret < 0)
	174	goto failusb;
	175
	176	ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
	177	if (ret < 0)
	178	goto failsync;
	179
	180	ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
	181	if (ret < 0)
	182	goto failring;
	183
3b2e46f8 RW	184	return ret;
3b2e46f8 RW	185
3b2e46f8 RW	186	failring:
	187	led_classdev_unregister(&fsg_sync_led);
	188	failsync:
	189	led_classdev_unregister(&fsg_usb_led);
	190	failusb:
	191	led_classdev_unregister(&fsg_sata_led);
	192	failsata:
	193	led_classdev_unregister(&fsg_wan_led);
	194	failwan:
	195	led_classdev_unregister(&fsg_wlan_led);
	196	failwlan:
07f696c7 SW	197	iounmap(latch_address);
07f696c7 SW	198	failremap:
3b2e46f8 RW	199
	200	return ret;
	201	}
	202
	203	static int fsg_led_remove(struct platform_device *pdev)
	204	{
3b2e46f8 RW	205	led_classdev_unregister(&fsg_wlan_led);
	206	led_classdev_unregister(&fsg_wan_led);
	207	led_classdev_unregister(&fsg_sata_led);
	208	led_classdev_unregister(&fsg_usb_led);
	209	led_classdev_unregister(&fsg_sync_led);
	210	led_classdev_unregister(&fsg_ring_led);
	211
07f696c7 SW	212	iounmap(latch_address);
07f696c7 SW	213
3b2e46f8 RW	214	return 0;
	215	}
	216
	217
	218	static struct platform_driver fsg_led_driver = {
	219	.probe = fsg_led_probe,
	220	.remove = fsg_led_remove,
3b2e46f8 RW	221	.driver = {
	222	.name = "fsg-led",
	223	},
	224	};
	225
	226
	227	static int __init fsg_led_init(void)
	228	{
	229	return platform_driver_register(&fsg_led_driver);
	230	}
	231
	232	static void __exit fsg_led_exit(void)
	233	{
	234	platform_driver_unregister(&fsg_led_driver);
	235	}
	236
	237
	238	module_init(fsg_led_init);
	239	module_exit(fsg_led_exit);
	240
	241	MODULE_AUTHOR("Rod Whitby <[email protected]>");
	242	MODULE_DESCRIPTION("Freecom FSG-3 LED driver");
	243	MODULE_LICENSE("GPL");