Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | /* * 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/init.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, }; /* 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 }, { }, }; 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; 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; 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"); |