USB: add support for Dream Cheeky DL100B Webmail Notifier (1d34:0004)

So far the USBLED driver only supports Delcom's "USB Visual Signal
Indicator" (http://www.delcomproducts.com/products_USBLMP.asp). The
driver generates virtual files "red", "green", and "blue" under the
device's /sys/ directory, where color values can be read from and
written to.

This patch adds support for Dream Cheeky's "DL100B Webmail Notifier"
(http://www.dreamcheeky.com/webmail-notifier -- available from several
shops, such as http://www.conrad.at/ce/de/product/777048/USB-WEBMAIL).
This device isn't as pretty as Delcom's, but it's *far* cheaper, and
its 3 LEDs can be set in 32 brightness steps each. The grey envelope
contour can easily be removed, leaving a rather neutral white box (with
a few small holes), which is useful for generic signalling purposes.
Of course, the small circuit board can easily be put into a prettier
case.

The DL100B device pretends to be a HID, but the HID descriptor shows
that it's not overly useful as such (see below). The patch therefore
removes the "HID-ness" (hid-core.c, hid-ids.h), and adds the necessary
commands to usbled.c. The protocol info comes from the developer's
manual that Dream Cheeky kindly provided (815DeveloperManual.pdf).

HID descriptor:

  0: 05 01   Usage Page 'Generic Desktop Controls'
  2: 09 10   Usage 'Reserved'
  4: a1 01   Collection 'Application (mouse, keyboard)'
  6: 05 00           Usage Page 'Undefined'
  8: 19 10           Usage Minimum = 16
 10: 29 11           Usage Maximum = 17
 12: 15 00           Logical Minimum = 0
 14: 25 0f           Logical Maximum = 15
 16: 75 08           Report Size = 8
 18: 95 08           Report Count = 8
 20: 91 02           Output data *var abs lin pref-state null-pos non-vol bit-field
 22: 19 10           Usage Minimum = 16
 24: 29 11           Usage Maximum = 17
 26: 15 00           Logical Minimum = 0
 28: 25 0f           Logical Maximum = 15
 30: 75 08           Report Size = 8
 32: 95 08           Report Count = 8
 34: 81 00           Input data array abs lin pref-state null-pos non-vol bit-field
 36: c0      End Collection

Signed-off-by: Melchior FRANZ <mfranz@aon.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 90 insertions, 28 deletions

diff --git a/drivers/usb/misc/usbled.c b/drivers/usb/misc/usbled.c
index c96f51de1696..1732d9bc097e 100644
--- a/drivers/usb/misc/usbled.c
+++ b/drivers/usb/misc/usbled.c
@@ -1,5 +1,5 @@
 /*
- * USB LED driver - 1.1
+ * USB LED driver
  *
  * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
  *
@@ -20,12 +20,17 @@
 #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
 #define DRIVER_DESC "USB LED Driver"
 
-#define VENDOR_ID       0x0fc5
-#define PRODUCT_ID      0x1223
+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(VENDOR_ID, PRODUCT_ID) },
+        { 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);
@@ -35,15 +40,12 @@ struct usb_led {
         unsigned char           blue;
         unsigned char           red;
         unsigned char           green;
+        enum led_type           type;
 };
 
-#define BLUE    0x04
-#define RED     0x02
-#define GREEN   0x01
 static void change_color(struct usb_led *led)
 {
         int retval;
-        unsigned char color = 0x07;
         unsigned char *buffer;
 
         buffer = kmalloc(8, GFP_KERNEL);
@@ -52,25 +54,59 @@ static void change_color(struct usb_led *led)
                 return;
         }
 
-        if (led->blue)
-                color &= ~(BLUE);
-        if (led->red)
-                color &= ~(RED);
-        if (led->green)
-                color &= ~(GREEN);
-        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);
+        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);
@@ -107,11 +143,12 @@ static int led_probe(struct usb_interface *interface, const struct usb_device_id
 
         dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
         if (dev == NULL) {
-                dev_err(&interface->dev, "Out of memory\n");
+                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);
 
@@ -125,6 +162,31 @@ static int led_probe(struct usb_interface *interface, const struct usb_device_id
         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;