[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/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,
	RISO_KAGAKU_LED
};

/* the Webmail LED made by RISO KAGAKU CORP. decodes a color index
   internally, we want to keep the red+green+blue sysfs api, so we decode
   from 1-bit RGB to the riso kagaku color index according to this table... */

static unsigned const char riso_kagaku_tbl[] = {
/* R+2G+4B -> riso kagaku color index */
	[0] = 0, /* black   */
	[1] = 2, /* red     */
	[2] = 1, /* green   */
	[3] = 5, /* yellow  */
	[4] = 3, /* blue    */
	[5] = 6, /* magenta */
	[6] = 4, /* cyan    */
	[7] = 7  /* white   */
};

#define RISO_KAGAKU_IX(r,g,b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]

/* 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 },
	{ USB_DEVICE(0x1d34, 0x000a),
			.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
	{ USB_DEVICE(0x1294, 0x1320),
			.driver_info = RISO_KAGAKU_LED },
	{ },
};
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;
	int actlength;

	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;

	case RISO_KAGAKU_LED:
		buffer[0] = RISO_KAGAKU_IX(led->red, led->green, led->blue);
		buffer[1] = 0;
		buffer[2] = 0;
		buffer[3] = 0;
		buffer[4] = 0;

		retval = usb_interrupt_msg(led->udev,
			usb_sndctrlpipe(led->udev, 2),
			buffer, 5, &actlength, 1000 /*ms timeout*/);
		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,
};

module_usb_driver(led_driver);

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>
1da177e4 LT	13	#include <linux/errno.h>
1da177e4 LT	14	#include <linux/slab.h>
	15	#include <linux/module.h>
	16	#include <linux/usb.h>
	17
	18
	19	#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
	20	#define DRIVER_DESC "USB LED Driver"
	21
73bc7d31 MF	22	enum led_type {
	23	DELCOM_VISUAL_SIGNAL_INDICATOR,
	24	DREAM_CHEEKY_WEBMAIL_NOTIFIER,
e8fcbb61	25	RISO_KAGAKU_LED
73bc7d31	26	};
1da177e4	27
e8fcbb61 CV	28	/* the Webmail LED made by RISO KAGAKU CORP. decodes a color index
	29	internally, we want to keep the red+green+blue sysfs api, so we decode
	30	from 1-bit RGB to the riso kagaku color index according to this table... */
	31
	32	static unsigned const char riso_kagaku_tbl[] = {
	33	/* R+2G+4B -> riso kagaku color index */
	34	[0] = 0, /* black */
	35	[1] = 2, /* red */
	36	[2] = 1, /* green */
	37	[3] = 5, /* yellow */
	38	[4] = 3, /* blue */
	39	[5] = 6, /* magenta */
	40	[6] = 4, /* cyan */
	41	[7] = 7 /* white */
	42	};
	43
	44	#define RISO_KAGAKU_IX(r,g,b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]
	45
1da177e4	46	/* table of devices that work with this driver */
33b9e162	47	static const struct usb_device_id id_table[] = {
73bc7d31 MF	48	{ USB_DEVICE(0x0fc5, 0x1223),
	49	.driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR },
	50	{ USB_DEVICE(0x1d34, 0x0004),
	51	.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
789aaa2e DD	52	{ USB_DEVICE(0x1d34, 0x000a),
789aaa2e DD	53	.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
e8fcbb61 CV	54	{ USB_DEVICE(0x1294, 0x1320),
e8fcbb61 CV	55	.driver_info = RISO_KAGAKU_LED },
1da177e4 LT	56	{ },
1da177e4 LT	57	};
ea835863	58	MODULE_DEVICE_TABLE(usb, id_table);
1da177e4 LT	59
1da177e4 LT	60	struct usb_led {
ea835863	61	struct usb_device *udev;
1da177e4 LT	62	unsigned char blue;
	63	unsigned char red;
	64	unsigned char green;
73bc7d31	65	enum led_type type;
1da177e4 LT	66	};
1da177e4 LT	67
1da177e4 LT	68	static void change_color(struct usb_led *led)
1da177e4 LT	69	{
952eca0a	70	int retval = 0;
1da177e4	71	unsigned char *buffer;
e8fcbb61	72	int actlength;
1da177e4 LT	73
	74	buffer = kmalloc(8, GFP_KERNEL);
	75	if (!buffer) {
	76	dev_err(&led->udev->dev, "out of memory\n");
	77	return;
	78	}
	79
73bc7d31 MF	80	switch (led->type) {
	81	case DELCOM_VISUAL_SIGNAL_INDICATOR: {
	82	unsigned char color = 0x07;
	83
	84	if (led->blue)
	85	color &= ~0x04;
	86	if (led->red)
	87	color &= ~0x02;
	88	if (led->green)
	89	color &= ~0x01;
	90	dev_dbg(&led->udev->dev,
	91	"blue = %d, red = %d, green = %d, color = %.2x\n",
	92	led->blue, led->red, led->green, color);
	93
	94	retval = usb_control_msg(led->udev,
	95	usb_sndctrlpipe(led->udev, 0),
	96	0x12,
	97	0xc8,
	98	(0x02 * 0x100) + 0x0a,
	99	(0x00 * 0x100) + color,
	100	buffer,
	101	8,
	102	2000);
	103	break;
	104	}
	105
	106	case DREAM_CHEEKY_WEBMAIL_NOTIFIER:
	107	dev_dbg(&led->udev->dev,
	108	"red = %d, green = %d, blue = %d\n",
	109	led->red, led->green, led->blue);
	110
	111	buffer[0] = led->red;
	112	buffer[1] = led->green;
	113	buffer[2] = led->blue;
	114	buffer[3] = buffer[4] = buffer[5] = 0;
	115	buffer[6] = 0x1a;
	116	buffer[7] = 0x05;
	117
	118	retval = usb_control_msg(led->udev,
	119	usb_sndctrlpipe(led->udev, 0),
	120	0x09,
	121	0x21,
	122	0x200,
	123	0,
	124	buffer,
	125	8,
	126	2000);
	127	break;
	128
e8fcbb61 CV	129	case RISO_KAGAKU_LED:
	130	buffer[0] = RISO_KAGAKU_IX(led->red, led->green, led->blue);
	131	buffer[1] = 0;
	132	buffer[2] = 0;
	133	buffer[3] = 0;
	134	buffer[4] = 0;
	135
	136	retval = usb_interrupt_msg(led->udev,
	137	usb_sndctrlpipe(led->udev, 2),
	138	buffer, 5, &actlength, 1000 /ms timeout/);
	139	break;
	140
73bc7d31 MF	141	default:
	142	dev_err(&led->udev->dev, "unknown device type %d\n", led->type);
	143	}
	144
1da177e4 LT	145	if (retval)
	146	dev_dbg(&led->udev->dev, "retval = %d\n", retval);
	147	kfree(buffer);
	148	}
	149
	150	#define show_set(value) \
ea835863 ZP	151	static ssize_t show_##value(struct device dev, struct device_attribute attr,\
ea835863 ZP	152	char *buf) \
1da177e4 LT	153	{ \
	154	struct usb_interface *intf = to_usb_interface(dev); \
	155	struct usb_led *led = usb_get_intfdata(intf); \
	156	\
	157	return sprintf(buf, "%d\n", led->value); \
	158	} \
ea835863 ZP	159	static ssize_t set_##value(struct device dev, struct device_attribute attr,\
ea835863 ZP	160	const char *buf, size_t count) \
1da177e4 LT	161	{ \
	162	struct usb_interface *intf = to_usb_interface(dev); \
	163	struct usb_led *led = usb_get_intfdata(intf); \
	164	int temp = simple_strtoul(buf, NULL, 10); \
	165	\
	166	led->value = temp; \
	167	change_color(led); \
	168	return count; \
	169	} \
48f11547	170	static DEVICE_ATTR(value, S_IRUGO \| S_IWUSR, show_##value, set_##value);
1da177e4 LT	171	show_set(blue);
	172	show_set(red);
	173	show_set(green);
	174
ea835863 ZP	175	static int led_probe(struct usb_interface *interface,
ea835863 ZP	176	const struct usb_device_id *id)
1da177e4 LT	177	{
	178	struct usb_device *udev = interface_to_usbdev(interface);
	179	struct usb_led *dev = NULL;
	180	int retval = -ENOMEM;
	181
06d69474	182	dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
1da177e4	183	if (dev == NULL) {
73bc7d31	184	dev_err(&interface->dev, "out of memory\n");
4d42e1bb	185	goto error_mem;
1da177e4	186	}
1da177e4 LT	187
1da177e4 LT	188	dev->udev = usb_get_dev(udev);
73bc7d31	189	dev->type = id->driver_info;
1da177e4	190
ea835863	191	usb_set_intfdata(interface, dev);
1da177e4	192
4d42e1bb GKH	193	retval = device_create_file(&interface->dev, &dev_attr_blue);
	194	if (retval)
	195	goto error;
	196	retval = device_create_file(&interface->dev, &dev_attr_red);
	197	if (retval)
	198	goto error;
	199	retval = device_create_file(&interface->dev, &dev_attr_green);
	200	if (retval)
	201	goto error;
1da177e4	202
73bc7d31 MF	203	if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) {
	204	unsigned char *enable;
	205
	206	enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL);
	207	if (!enable) {
	208	dev_err(&interface->dev, "out of memory\n");
	209	retval = -ENOMEM;
	210	goto error;
	211	}
	212
	213	retval = usb_control_msg(udev,
	214	usb_sndctrlpipe(udev, 0),
	215	0x09,
	216	0x21,
	217	0x200,
	218	0,
	219	enable,
	220	8,
	221	2000);
	222
	223	kfree(enable);
	224	if (retval != 8)
	225	goto error;
	226	}
	227
1da177e4 LT	228	dev_info(&interface->dev, "USB LED device now attached\n");
	229	return 0;
	230
	231	error:
4d42e1bb GKH	232	device_remove_file(&interface->dev, &dev_attr_blue);
	233	device_remove_file(&interface->dev, &dev_attr_red);
	234	device_remove_file(&interface->dev, &dev_attr_green);
ea835863	235	usb_set_intfdata(interface, NULL);
4d42e1bb	236	usb_put_dev(dev->udev);
1da177e4	237	kfree(dev);
4d42e1bb	238	error_mem:
1da177e4 LT	239	return retval;
	240	}
	241
	242	static void led_disconnect(struct usb_interface *interface)
	243	{
	244	struct usb_led *dev;
	245
ea835863	246	dev = usb_get_intfdata(interface);
1da177e4 LT	247
	248	device_remove_file(&interface->dev, &dev_attr_blue);
	249	device_remove_file(&interface->dev, &dev_attr_red);
	250	device_remove_file(&interface->dev, &dev_attr_green);
	251
ed206ec9	252	/* first remove the files, then set the pointer to NULL */
ea835863	253	usb_set_intfdata(interface, NULL);
ed206ec9	254
1da177e4 LT	255	usb_put_dev(dev->udev);
	256
	257	kfree(dev);
	258
	259	dev_info(&interface->dev, "USB LED now disconnected\n");
	260	}
	261
	262	static struct usb_driver led_driver = {
1da177e4 LT	263	.name = "usbled",
	264	.probe = led_probe,
	265	.disconnect = led_disconnect,
	266	.id_table = id_table,
	267	};
	268
65db4305	269	module_usb_driver(led_driver);
1da177e4 LT	270
	271	MODULE_AUTHOR(DRIVER_AUTHOR);
	272	MODULE_DESCRIPTION(DRIVER_DESC);
	273	MODULE_LICENSE("GPL");