diff options
Diffstat (limited to 'kernel/drivers/usb/misc/usbled.c')
| -rw-r--r-- | kernel/drivers/usb/misc/usbled.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/kernel/drivers/usb/misc/usbled.c b/kernel/drivers/usb/misc/usbled.c new file mode 100644 index 000000000..bdef0d6eb --- /dev/null +++ b/kernel/drivers/usb/misc/usbled.c @@ -0,0 +1,273 @@ +/* + * 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"); |