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Commit e8fcbb61 authored by Christian Vogel's avatar Christian Vogel Committed by Greg Kroah-Hartman
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usb/misc/usbled: Add Riso Kagaku Webmail Notifier 

Add support for the "Webmail Notifier" (USB powered LED for signaling
new emails) made by Riso Kagaku Corp. which displays 7 distinct colors.

USB Protocol initially reverse engineered by
	https://code.google.com/p/usbmailnotifier/

.

Signed-off-by: default avatarChristian Vogel <vogelchr@vogel.cx>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ea17c7c6

drivers/usb/misc/usbled.c

+34 −0
Original line number Diff line number Diff line
@@ -22,8 +22,27 @@ 
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),
@@ -32,6 +51,8 @@ static const struct usb_device_id id_table[] = { 
			.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);
@@ -48,6 +69,7 @@ static void change_color(struct usb_led *led) 
{

	int retval = 0;

	unsigned char *buffer;

	int actlength;



	buffer = kmalloc(8, GFP_KERNEL);

	if (!buffer) {
@@ -104,6 +126,18 @@ static void change_color(struct usb_led *led) 
					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);

	}