drivers/usb/usbkbd.c

   1 /*
   2  *  usbkbd.c  Version 0.1
   3  *
   4  *  Copyright (c) 1999 Vojtech Pavlik
   5  *
   6  *  USB HIDBP Keyboard support
   7  *
   8  *  Sponsored by SuSE
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
  28  * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/malloc.h>
  33 #include <linux/module.h>
  34 #include <linux/input.h>
  35 #include <linux/init.h>
  36 #include "usb.h"
  37
  38 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  39
  40 static unsigned char usb_kbd_keycode[256] = {
  41           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  42          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  43           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  44          27, 43, 84, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  45          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  46         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  47          72, 73, 82, 83, 86,127,116,117, 85, 89, 90, 91, 92, 93, 94, 95,
  48         120,121,122,123,134,138,130,132,128,129,131,137,133,135,136,113,
  49         115,114,  0,  0,  0,  0,  0,124,  0,  0,  0,  0,  0,  0,  0,  0,
  50           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  51           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  52           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  53           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  54           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  55          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  56         150,158,159,128,136,177,178,176,142,152,173,140
  57 };
  58
  59 struct usb_kbd {
  60         struct input_dev dev;
  61         unsigned char new[8];
  62         unsigned char old[8];
  63         struct urb irq, led;
  64         devrequest dr;
  65         unsigned char leds;
  66 };
  67
  68 static void usb_kbd_irq(struct urb *urb)
  69 {
  70         struct usb_kbd *kbd = urb->context;
  71         int i;
  72
  73         if (urb->status) return;
  74
  75         for (i = 0; i < 8; i++)
  76                 input_report_key(&kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
  77
  78         for (i = 2; i < 8; i++) {
  79
  80                 if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
  81                         if (usb_kbd_keycode[kbd->old[i]])
  82                                 input_report_key(&kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
  83                         else
  84                                 info("Unknown key (scancode %#x) released.", kbd->old[i]);
  85                 }
  86
  87                 if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
  88                         if (usb_kbd_keycode[kbd->new[i]])
  89                                 input_report_key(&kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
  90                         else
  91                                 info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
  92                 }
  93         }
  94
  95         memcpy(kbd->old, kbd->new, 8);
  96 }
  97
  98 int usb_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
  99 {
 100         struct usb_kbd *kbd = dev->private;
 101
 102         if (type != EV_LED) return -1;
 103
 104         if (kbd->led.status == -EINPROGRESS) {
 105                 warn("had to kill led urb");
 106                 usb_unlink_urb(&kbd->led);
 107         }
 108
 109         kbd->leds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 110                     (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 111                     (!!test_bit(LED_NUML,    dev->led));
 112
 113
 114         if (usb_submit_urb(&kbd->led)) {
 115                 err("usb_submit_urb(leds) failed");
 116                 return -1;
 117         }
 118
 119         return 0;
 120 }
 121
 122 static void usb_kbd_led(struct urb *urb)
 123 {
 124         if (urb->status)
 125                 warn("led urb status %d received", urb->status);
 126 }
 127
 128 static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 129 {
 130         struct usb_interface_descriptor *interface;
 131         struct usb_endpoint_descriptor *endpoint;
 132         struct usb_kbd *kbd;
 133         int i;
 134
 135         if (dev->descriptor.bNumConfigurations != 1) return NULL;
 136         interface = dev->config[0].interface[ifnum].altsetting + 0;
 137
 138         if (interface->bInterfaceClass != 3) return NULL;
 139         if (interface->bInterfaceSubClass != 1) return NULL;
 140         if (interface->bInterfaceProtocol != 1) return NULL;
 141         if (interface->bNumEndpoints != 1) return NULL;
 142
 143         endpoint = interface->endpoint + 0;
 144         if (!(endpoint->bEndpointAddress & 0x80)) return NULL;
 145         if ((endpoint->bmAttributes & 3) != 3) return NULL;
 146
 147         usb_set_protocol(dev, interface->bInterfaceNumber, 0);
 148         usb_set_idle(dev, interface->bInterfaceNumber, 0, 0);
 149
 150         if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL))) return NULL;
 151         memset(kbd, 0, sizeof(struct usb_kbd));
 152
 153         kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
 154         kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);
 155
 156         for (i = 0; i < 255; i++)
 157                 set_bit(usb_kbd_keycode[i], kbd->dev.keybit);
 158         clear_bit(0, kbd->dev.keybit);
 159
 160         kbd->dev.private = kbd;
 161         kbd->dev.event = usb_kbd_event;
 162
 163         {
 164                 int pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 165                 int maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 166
 167                 FILL_INT_URB(&kbd->irq, dev, pipe, kbd->new, maxp > 8 ? 8 : maxp,
 168                         usb_kbd_irq, kbd, endpoint->bInterval);
 169         }
 170
 171         kbd->dr.requesttype = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 172         kbd->dr.request = USB_REQ_SET_REPORT;
 173         kbd->dr.value = 0x200;
 174         kbd->dr.index = interface->bInterfaceNumber;
 175         kbd->dr.length = 1;
 176
 177         FILL_CONTROL_URB(&kbd->led, dev, usb_sndctrlpipe(dev, 0),
 178                 (void*) &kbd->dr, &kbd->leds, 1, usb_kbd_led, kbd);
 179
 180         if (usb_submit_urb(&kbd->irq)) {
 181                 kfree(kbd);
 182                 return NULL;
 183         }
 184
 185         input_register_device(&kbd->dev);
 186
 187         printk(KERN_INFO "input%d: USB HIDBP keyboard\n", kbd->dev.number);
 188
 189
 190         return kbd;
 191 }
 192
 193 static void usb_kbd_disconnect(struct usb_device *dev, void *ptr)
 194 {
 195         struct usb_kbd *kbd = ptr;
 196         usb_unlink_urb(&kbd->irq);
 197         input_unregister_device(&kbd->dev);
 198         kfree(kbd);
 199 }
 200
 201 static struct usb_driver usb_kbd_driver = {
 202         name:           "keyboard",
 203         probe:          usb_kbd_probe,
 204         disconnect:     usb_kbd_disconnect
 205 };
 206
 207 static int __init usb_kbd_init(void)
 208 {
 209         usb_register(&usb_kbd_driver);
 210         return 0;
 211 }
 212
 213 static void __exit usb_kbd_exit(void)
 214 {
 215         usb_deregister(&usb_kbd_driver);
 216 }
 217
 218 module_init(usb_kbd_init);
 219 module_exit(usb_kbd_exit);