mirror of https://gitee.com/openkylin/linux.git
274 lines
6.4 KiB
C
274 lines
6.4 KiB
C
/*
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* USB LED driver
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*
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* Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com"
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#define DRIVER_DESC "USB LED Driver"
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enum led_type {
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DELCOM_VISUAL_SIGNAL_INDICATOR,
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DREAM_CHEEKY_WEBMAIL_NOTIFIER,
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RISO_KAGAKU_LED
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};
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/* the Webmail LED made by RISO KAGAKU CORP. decodes a color index
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internally, we want to keep the red+green+blue sysfs api, so we decode
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from 1-bit RGB to the riso kagaku color index according to this table... */
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static unsigned const char riso_kagaku_tbl[] = {
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/* R+2G+4B -> riso kagaku color index */
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[0] = 0, /* black */
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[1] = 2, /* red */
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[2] = 1, /* green */
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[3] = 5, /* yellow */
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[4] = 3, /* blue */
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[5] = 6, /* magenta */
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[6] = 4, /* cyan */
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[7] = 7 /* white */
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};
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#define RISO_KAGAKU_IX(r,g,b) riso_kagaku_tbl[((r)?1:0)+((g)?2:0)+((b)?4:0)]
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/* table of devices that work with this driver */
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(0x0fc5, 0x1223),
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.driver_info = DELCOM_VISUAL_SIGNAL_INDICATOR },
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{ USB_DEVICE(0x1d34, 0x0004),
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.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
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{ USB_DEVICE(0x1d34, 0x000a),
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.driver_info = DREAM_CHEEKY_WEBMAIL_NOTIFIER },
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{ USB_DEVICE(0x1294, 0x1320),
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.driver_info = RISO_KAGAKU_LED },
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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struct usb_led {
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struct usb_device *udev;
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unsigned char blue;
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unsigned char red;
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unsigned char green;
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enum led_type type;
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};
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static void change_color(struct usb_led *led)
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{
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int retval = 0;
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unsigned char *buffer;
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int actlength;
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buffer = kmalloc(8, GFP_KERNEL);
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if (!buffer) {
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dev_err(&led->udev->dev, "out of memory\n");
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return;
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}
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switch (led->type) {
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case DELCOM_VISUAL_SIGNAL_INDICATOR: {
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unsigned char color = 0x07;
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if (led->blue)
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color &= ~0x04;
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if (led->red)
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color &= ~0x02;
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if (led->green)
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color &= ~0x01;
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dev_dbg(&led->udev->dev,
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"blue = %d, red = %d, green = %d, color = %.2x\n",
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led->blue, led->red, led->green, color);
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retval = usb_control_msg(led->udev,
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usb_sndctrlpipe(led->udev, 0),
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0x12,
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0xc8,
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(0x02 * 0x100) + 0x0a,
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(0x00 * 0x100) + color,
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buffer,
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8,
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2000);
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break;
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}
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case DREAM_CHEEKY_WEBMAIL_NOTIFIER:
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dev_dbg(&led->udev->dev,
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"red = %d, green = %d, blue = %d\n",
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led->red, led->green, led->blue);
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buffer[0] = led->red;
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buffer[1] = led->green;
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buffer[2] = led->blue;
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buffer[3] = buffer[4] = buffer[5] = 0;
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buffer[6] = 0x1a;
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buffer[7] = 0x05;
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retval = usb_control_msg(led->udev,
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usb_sndctrlpipe(led->udev, 0),
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0x09,
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0x21,
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0x200,
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0,
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buffer,
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8,
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2000);
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break;
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case RISO_KAGAKU_LED:
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buffer[0] = RISO_KAGAKU_IX(led->red, led->green, led->blue);
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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buffer[4] = 0;
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retval = usb_interrupt_msg(led->udev,
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usb_sndctrlpipe(led->udev, 2),
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buffer, 5, &actlength, 1000 /*ms timeout*/);
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break;
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default:
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dev_err(&led->udev->dev, "unknown device type %d\n", led->type);
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}
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if (retval)
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dev_dbg(&led->udev->dev, "retval = %d\n", retval);
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kfree(buffer);
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}
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#define show_set(value) \
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static ssize_t show_##value(struct device *dev, struct device_attribute *attr,\
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char *buf) \
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{ \
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struct usb_interface *intf = to_usb_interface(dev); \
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struct usb_led *led = usb_get_intfdata(intf); \
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\
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return sprintf(buf, "%d\n", led->value); \
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} \
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static ssize_t set_##value(struct device *dev, struct device_attribute *attr,\
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const char *buf, size_t count) \
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{ \
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struct usb_interface *intf = to_usb_interface(dev); \
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struct usb_led *led = usb_get_intfdata(intf); \
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int temp = simple_strtoul(buf, NULL, 10); \
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\
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led->value = temp; \
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change_color(led); \
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return count; \
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} \
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static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, show_##value, set_##value);
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show_set(blue);
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show_set(red);
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show_set(green);
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static int led_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(interface);
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struct usb_led *dev = NULL;
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int retval = -ENOMEM;
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dev = kzalloc(sizeof(struct usb_led), GFP_KERNEL);
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if (dev == NULL) {
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dev_err(&interface->dev, "out of memory\n");
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goto error_mem;
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}
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dev->udev = usb_get_dev(udev);
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dev->type = id->driver_info;
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usb_set_intfdata(interface, dev);
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retval = device_create_file(&interface->dev, &dev_attr_blue);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_red);
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if (retval)
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goto error;
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retval = device_create_file(&interface->dev, &dev_attr_green);
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if (retval)
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goto error;
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if (dev->type == DREAM_CHEEKY_WEBMAIL_NOTIFIER) {
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unsigned char *enable;
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enable = kmemdup("\x1f\x02\0\x5f\0\0\x1a\x03", 8, GFP_KERNEL);
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if (!enable) {
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dev_err(&interface->dev, "out of memory\n");
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retval = -ENOMEM;
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goto error;
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}
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retval = usb_control_msg(udev,
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usb_sndctrlpipe(udev, 0),
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0x09,
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0x21,
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0x200,
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0,
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enable,
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8,
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2000);
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kfree(enable);
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if (retval != 8)
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goto error;
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}
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dev_info(&interface->dev, "USB LED device now attached\n");
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return 0;
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error:
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device_remove_file(&interface->dev, &dev_attr_blue);
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device_remove_file(&interface->dev, &dev_attr_red);
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device_remove_file(&interface->dev, &dev_attr_green);
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usb_set_intfdata(interface, NULL);
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usb_put_dev(dev->udev);
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kfree(dev);
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error_mem:
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return retval;
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}
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static void led_disconnect(struct usb_interface *interface)
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{
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struct usb_led *dev;
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dev = usb_get_intfdata(interface);
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device_remove_file(&interface->dev, &dev_attr_blue);
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device_remove_file(&interface->dev, &dev_attr_red);
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device_remove_file(&interface->dev, &dev_attr_green);
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/* first remove the files, then set the pointer to NULL */
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usb_set_intfdata(interface, NULL);
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usb_put_dev(dev->udev);
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kfree(dev);
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dev_info(&interface->dev, "USB LED now disconnected\n");
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}
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static struct usb_driver led_driver = {
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.name = "usbled",
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.probe = led_probe,
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.disconnect = led_disconnect,
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.id_table = id_table,
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};
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module_usb_driver(led_driver);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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