[deliverable/linux.git] / drivers / usb / misc / usbled.c

/*
 * USB LED driver
 *
 * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
 *
 *	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, version 2.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>


#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
#define DRIVER_DESC "USB LED Driver"

enum led_type {
	DELCOM_VISUAL_SIGNAL_INDICATOR,
	DREAM_CHEEKY_WEBMAIL_NOTIFIER,
};

/* table of devices that work with this driver */
static const struct usb_device_id id_table[] = {
	{ USB_DEVICE(0x0fc5, 0x1223),
			.driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR },
	{ USB_DEVICE(0x1d34, 0x0004),
			.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
	{ },
};
MODULE_DEVICE_TABLE (usb, id_table);

struct usb_led {
	struct usb_device *	udev;
	unsigned char		blue;
	unsigned char		red;
	unsigned char		green;
	enum led_type		type;
};

static void change_color(struct usb_led *led)
{
	int retval = 0;
	unsigned char *buffer;

	buffer = kmalloc(8, GFP_KERNEL);
	if (!buffer) {
		dev_err(&led->udev->dev, "out of memory\n");
		return;
	}

	switch (led->type) {
	case DELCOM_VISUAL_SIGNAL_INDICATOR: {
		unsigned char color = 0x07;

		if (led->blue)
			color &= ~0x04;
		if (led->red)
			color &= ~0x02;
		if (led->green)
			color &= ~0x01;
		dev_dbg(&led->udev->dev,
			"blue = %d, red = %d, green = %d, color = %.2x\n",
			led->blue, led->red, led->green, color);

		retval = usb_control_msg(led->udev,
					usb_sndctrlpipe(led->udev, 0),
					0x12,
					0xc8,
					(0x02 * 0x100) + 0x0a,
					(0x00 * 0x100) + color,
					buffer,
					8,
					2000);
		break;
	}

	case DREAM_CHEEKY_WEBMAIL_NOTIFIER:
		dev_dbg(&led->udev->dev,
			"red = %d, green = %d, blue = %d\n",
			led->red, led->green, led->blue);

		buffer[0] = led->red;
		buffer[1] = led->green;
		buffer[2] = led->blue;
		buffer[3] = buffer[4] = buffer[5] = 0;
		buffer[6] = 0x1a;
		buffer[7] = 0x05;

		retval = usb_control_msg(led->udev,
					usb_sndctrlpipe(led->udev, 0),
					0x09,
					0x21,
					0x200,
					0,
					buffer,
					8,
					2000);
		break;

	default:
		dev_err(&led->udev->dev, "unknown device type %d\n", led->type);
	}

	if (retval)
		dev_dbg(&led->udev->dev, "retval = %d\n", retval);
	kfree(buffer);
}

#define show_set(value)	\
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf)		\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct usb_led *led = usb_get_intfdata(intf);			\
									\
	return sprintf(buf, "%d\n", led->value);			\
}									\
static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct usb_led *led = usb_get_intfdata(intf);			\
	int temp = simple_strtoul(buf, NULL, 10);			\
									\
	led->value = temp;						\
	change_color(led);						\
	return count;							\
}									\
static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, show_##value, set_##value);
show_set(blue);
show_set(red);
show_set(green);

static int led_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(interface);
	struct usb_led *dev = NULL;
	int retval = -ENOMEM;

	dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
	if (dev == NULL) {
		dev_err(&interface->dev, "out of memory\n");
		goto error_mem;
	}

	dev->udev = usb_get_dev(udev);
	dev->type = id->driver_info;

	usb_set_intfdata (interface, dev);

	retval = device_create_file(&interface->dev, &dev_attr_blue);
	if (retval)
		goto error;
	retval = device_create_file(&interface->dev, &dev_attr_red);
	if (retval)
		goto error;
	retval = device_create_file(&interface->dev, &dev_attr_green);
	if (retval)
		goto error;

	if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) {
		unsigned char *enable;

		enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL);
		if (!enable) {
			dev_err(&interface->dev, "out of memory\n");
			retval = -ENOMEM;
			goto error;
		}

		retval = usb_control_msg(udev,
					usb_sndctrlpipe(udev, 0),
					0x09,
					0x21,
					0x200,
					0,
					enable,
					8,
					2000);

		kfree(enable);
		if (retval != 8)
			goto error;
	}

	dev_info(&interface->dev, "USB LED device now attached\n");
	return 0;

error:
	device_remove_file(&interface->dev, &dev_attr_blue);
	device_remove_file(&interface->dev, &dev_attr_red);
	device_remove_file(&interface->dev, &dev_attr_green);
	usb_set_intfdata (interface, NULL);
	usb_put_dev(dev->udev);
	kfree(dev);
error_mem:
	return retval;
}

static void led_disconnect(struct usb_interface *interface)
{
	struct usb_led *dev;

	dev = usb_get_intfdata (interface);

	device_remove_file(&interface->dev, &dev_attr_blue);
	device_remove_file(&interface->dev, &dev_attr_red);
	device_remove_file(&interface->dev, &dev_attr_green);

	/* first remove the files, then set the pointer to NULL */
	usb_set_intfdata (interface, NULL);

	usb_put_dev(dev->udev);

	kfree(dev);

	dev_info(&interface->dev, "USB LED now disconnected\n");
}

static struct usb_driver led_driver = {
	.name =		"usbled",
	.probe =	led_probe,
	.disconnect =	led_disconnect,
	.id_table =	id_table,
};

static int __init usb_led_init(void)
{
	int retval = 0;

	retval = usb_register(&led_driver);
	if (retval)
		err("usb_register failed. Error number %d", retval);
	return retval;
}

static void __exit usb_led_exit(void)
{
	usb_deregister(&led_driver);
}

module_init (usb_led_init);
module_exit (usb_led_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
73bc7d31	2	* USB LED driver
1da177e4 LT	3	*
	4	* Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation, version 2.
	9	*
	10	*/
	11
1da177e4 LT	12	#include <linux/kernel.h>
	13	#include <linux/errno.h>
	14	#include <linux/init.h>
	15	#include <linux/slab.h>
	16	#include <linux/module.h>
	17	#include <linux/usb.h>
	18
	19
	20	#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
	21	#define DRIVER_DESC "USB LED Driver"
	22
73bc7d31 MF	23	enum led_type {
	24	DELCOM_VISUAL_SIGNAL_INDICATOR,
	25	DREAM_CHEEKY_WEBMAIL_NOTIFIER,
	26	};
1da177e4 LT	27
1da177e4 LT	28	/* table of devices that work with this driver */
33b9e162	29	static const struct usb_device_id id_table[] = {
73bc7d31 MF	30	{ USB_DEVICE(0x0fc5, 0x1223),
	31	.driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR },
	32	{ USB_DEVICE(0x1d34, 0x0004),
	33	.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
1da177e4 LT	34	{ },
	35	};
	36	MODULE_DEVICE_TABLE (usb, id_table);
	37
	38	struct usb_led {
	39	struct usb_device * udev;
	40	unsigned char blue;
	41	unsigned char red;
	42	unsigned char green;
73bc7d31	43	enum led_type type;
1da177e4 LT	44	};
1da177e4 LT	45
1da177e4 LT	46	static void change_color(struct usb_led *led)
1da177e4 LT	47	{
952eca0a	48	int retval = 0;
1da177e4 LT	49	unsigned char *buffer;
	50
	51	buffer = kmalloc(8, GFP_KERNEL);
	52	if (!buffer) {
	53	dev_err(&led->udev->dev, "out of memory\n");
	54	return;
	55	}
	56
73bc7d31 MF	57	switch (led->type) {
	58	case DELCOM_VISUAL_SIGNAL_INDICATOR: {
	59	unsigned char color = 0x07;
	60
	61	if (led->blue)
	62	color &= ~0x04;
	63	if (led->red)
	64	color &= ~0x02;
	65	if (led->green)
	66	color &= ~0x01;
	67	dev_dbg(&led->udev->dev,
	68	"blue = %d, red = %d, green = %d, color = %.2x\n",
	69	led->blue, led->red, led->green, color);
	70
	71	retval = usb_control_msg(led->udev,
	72	usb_sndctrlpipe(led->udev, 0),
	73	0x12,
	74	0xc8,
	75	(0x02 * 0x100) + 0x0a,
	76	(0x00 * 0x100) + color,
	77	buffer,
	78	8,
	79	2000);
	80	break;
	81	}
	82
	83	case DREAM_CHEEKY_WEBMAIL_NOTIFIER:
	84	dev_dbg(&led->udev->dev,
	85	"red = %d, green = %d, blue = %d\n",
	86	led->red, led->green, led->blue);
	87
	88	buffer[0] = led->red;
	89	buffer[1] = led->green;
	90	buffer[2] = led->blue;
	91	buffer[3] = buffer[4] = buffer[5] = 0;
	92	buffer[6] = 0x1a;
	93	buffer[7] = 0x05;
	94
	95	retval = usb_control_msg(led->udev,
	96	usb_sndctrlpipe(led->udev, 0),
	97	0x09,
	98	0x21,
	99	0x200,
	100	0,
	101	buffer,
	102	8,
	103	2000);
	104	break;
	105
	106	default:
	107	dev_err(&led->udev->dev, "unknown device type %d\n", led->type);
	108	}
	109
1da177e4 LT	110	if (retval)
	111	dev_dbg(&led->udev->dev, "retval = %d\n", retval);
	112	kfree(buffer);
	113	}
	114
	115	#define show_set(value) \
060b8845	116	static ssize_t show_##value(struct device dev, struct device_attribute attr, char *buf) \
1da177e4 LT	117	{ \
	118	struct usb_interface *intf = to_usb_interface(dev); \
	119	struct usb_led *led = usb_get_intfdata(intf); \
	120	\
	121	return sprintf(buf, "%d\n", led->value); \
	122	} \
060b8845	123	static ssize_t set_##value(struct device dev, struct device_attribute attr, const char *buf, size_t count) \
1da177e4 LT	124	{ \
	125	struct usb_interface *intf = to_usb_interface(dev); \
	126	struct usb_led *led = usb_get_intfdata(intf); \
	127	int temp = simple_strtoul(buf, NULL, 10); \
	128	\
	129	led->value = temp; \
	130	change_color(led); \
	131	return count; \
	132	} \
48f11547	133	static DEVICE_ATTR(value, S_IRUGO \| S_IWUSR, show_##value, set_##value);
1da177e4 LT	134	show_set(blue);
	135	show_set(red);
	136	show_set(green);
	137
	138	static int led_probe(struct usb_interface interface, const struct usb_device_id id)
	139	{
	140	struct usb_device *udev = interface_to_usbdev(interface);
	141	struct usb_led *dev = NULL;
	142	int retval = -ENOMEM;
	143
06d69474	144	dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
1da177e4	145	if (dev == NULL) {
73bc7d31	146	dev_err(&interface->dev, "out of memory\n");
4d42e1bb	147	goto error_mem;
1da177e4	148	}
1da177e4 LT	149
1da177e4 LT	150	dev->udev = usb_get_dev(udev);
73bc7d31	151	dev->type = id->driver_info;
1da177e4 LT	152
	153	usb_set_intfdata (interface, dev);
	154
4d42e1bb GKH	155	retval = device_create_file(&interface->dev, &dev_attr_blue);
	156	if (retval)
	157	goto error;
	158	retval = device_create_file(&interface->dev, &dev_attr_red);
	159	if (retval)
	160	goto error;
	161	retval = device_create_file(&interface->dev, &dev_attr_green);
	162	if (retval)
	163	goto error;
1da177e4	164
73bc7d31 MF	165	if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) {
	166	unsigned char *enable;
	167
	168	enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL);
	169	if (!enable) {
	170	dev_err(&interface->dev, "out of memory\n");
	171	retval = -ENOMEM;
	172	goto error;
	173	}
	174
	175	retval = usb_control_msg(udev,
	176	usb_sndctrlpipe(udev, 0),
	177	0x09,
	178	0x21,
	179	0x200,
	180	0,
	181	enable,
	182	8,
	183	2000);
	184
	185	kfree(enable);
	186	if (retval != 8)
	187	goto error;
	188	}
	189
1da177e4 LT	190	dev_info(&interface->dev, "USB LED device now attached\n");
	191	return 0;
	192
	193	error:
4d42e1bb GKH	194	device_remove_file(&interface->dev, &dev_attr_blue);
	195	device_remove_file(&interface->dev, &dev_attr_red);
	196	device_remove_file(&interface->dev, &dev_attr_green);
	197	usb_set_intfdata (interface, NULL);
	198	usb_put_dev(dev->udev);
1da177e4	199	kfree(dev);
4d42e1bb	200	error_mem:
1da177e4 LT	201	return retval;
	202	}
	203
	204	static void led_disconnect(struct usb_interface *interface)
	205	{
	206	struct usb_led *dev;
	207
	208	dev = usb_get_intfdata (interface);
1da177e4 LT	209
	210	device_remove_file(&interface->dev, &dev_attr_blue);
	211	device_remove_file(&interface->dev, &dev_attr_red);
	212	device_remove_file(&interface->dev, &dev_attr_green);
	213
ed206ec9 ON	214	/* first remove the files, then set the pointer to NULL */
	215	usb_set_intfdata (interface, NULL);
	216
1da177e4 LT	217	usb_put_dev(dev->udev);
	218
	219	kfree(dev);
	220
	221	dev_info(&interface->dev, "USB LED now disconnected\n");
	222	}
	223
	224	static struct usb_driver led_driver = {
1da177e4 LT	225	.name = "usbled",
	226	.probe = led_probe,
	227	.disconnect = led_disconnect,
	228	.id_table = id_table,
	229	};
	230
	231	static int __init usb_led_init(void)
	232	{
	233	int retval = 0;
	234
	235	retval = usb_register(&led_driver);
	236	if (retval)
	237	err("usb_register failed. Error number %d", retval);
	238	return retval;
	239	}
	240
	241	static void __exit usb_led_exit(void)
	242	{
	243	usb_deregister(&led_driver);
	244	}
	245
	246	module_init (usb_led_init);
	247	module_exit (usb_led_exit);
	248
	249	MODULE_AUTHOR(DRIVER_AUTHOR);
	250	MODULE_DESCRIPTION(DRIVER_DESC);
	251	MODULE_LICENSE("GPL");