mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
e8fcbb6140
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: Christian Vogel <vogelchr@vogel.cx> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
274 lines
6.4 KiB
C
274 lines
6.4 KiB
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");
|