--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff