drivers/usb/usbkbd.c

   1 /*
   2  * $Id: usbkbd.c,v 1.11 2000/05/29 09:01:52 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2000 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 <linux/usb.h>
  37
  38 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  39 MODULE_DESCRIPTION("USB HID Boot Protocol keyboard driver");
  40
  41 static unsigned char usb_kbd_keycode[256] = {
  42           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  43          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  44           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  45          27, 43, 84, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  46          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  47         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  48          72, 73, 82, 83, 86,127,116,117, 85, 89, 90, 91, 92, 93, 94, 95,
  49         120,121,122,123,134,138,130,132,128,129,131,137,133,135,136,113,
  50         115,114,  0,  0,  0,  0,  0,124,  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           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  56          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  57         150,158,159,128,136,177,178,176,142,152,173,140
  58 };
  59
  60 struct usb_kbd {
  61         struct input_dev dev;
  62         unsigned char new[8];
  63         unsigned char old[8];
  64         struct urb irq, led;
  65         devrequest dr;
  66         unsigned char leds;
  67         char name[128];
  68         int open;
  69 };
  70
  71 static void usb_kbd_irq(struct urb *urb)
  72 {
  73         struct usb_kbd *kbd = urb->context;
  74         int i;
  75
  76         if (urb->status) return;
  77
  78         for (i = 0; i < 8; i++)
  79                 input_report_key(&kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
  80
  81         for (i = 2; i < 8; i++) {
  82
  83                 if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
  84                         if (usb_kbd_keycode[kbd->old[i]])
  85                                 input_report_key(&kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
  86                         else
  87                                 info("Unknown key (scancode %#x) released.", kbd->old[i]);
  88                 }
  89
  90                 if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
  91                         if (usb_kbd_keycode[kbd->new[i]])
  92                                 input_report_key(&kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
  93                         else
  94                                 info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
  95                 }
  96         }
  97
  98         memcpy(kbd->old, kbd->new, 8);
  99 }
 100
 101 int usb_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 102 {
 103         struct usb_kbd *kbd = dev->private;
 104
 105         if (type != EV_LED) return -1;
 106
 107         if (kbd->led.status == -EINPROGRESS) {
 108                 warn("had to kill led urb");
 109                 usb_unlink_urb(&kbd->led);
 110         }
 111
 112         kbd->leds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 113                     (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 114                     (!!test_bit(LED_NUML,    dev->led));
 115
 116
 117         if (usb_submit_urb(&kbd->led)) {
 118                 err("usb_submit_urb(leds) failed");
 119                 return -1;
 120         }
 121
 122         return 0;
 123 }
 124
 125 static void usb_kbd_led(struct urb *urb)
 126 {
 127         if (urb->status)
 128                 warn("led urb status %d received", urb->status);
 129 }
 130
 131 static int usb_kbd_open(struct input_dev *dev)
 132 {
 133         struct usb_kbd *kbd = dev->private;
 134
 135         if (kbd->open++)
 136                 return 0;
 137
 138         if (usb_submit_urb(&kbd->irq))
 139                 return -EIO;
 140
 141         return 0;
 142 }
 143
 144 static void usb_kbd_close(struct input_dev *dev)
 145 {
 146         struct usb_kbd *kbd = dev->private;
 147
 148         if (!--kbd->open)
 149                 usb_unlink_urb(&kbd->irq);
 150 }
 151
 152 static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 153 {
 154         struct usb_interface_descriptor *interface;
 155         struct usb_endpoint_descriptor *endpoint;
 156         struct usb_kbd *kbd;
 157         int i, pipe, maxp;
 158         char *buf;
 159
 160         if (dev->descriptor.bNumConfigurations != 1) return NULL;
 161         interface = dev->config[0].interface[ifnum].altsetting + 0;
 162
 163         if (interface->bInterfaceClass != 3) return NULL;
 164         if (interface->bInterfaceSubClass != 1) return NULL;
 165         if (interface->bInterfaceProtocol != 1) return NULL;
 166         if (interface->bNumEndpoints != 1) return NULL;
 167
 168         endpoint = interface->endpoint + 0;
 169         if (!(endpoint->bEndpointAddress & 0x80)) return NULL;
 170         if ((endpoint->bmAttributes & 3) != 3) return NULL;
 171
 172         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 173         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 174
 175         usb_set_protocol(dev, interface->bInterfaceNumber, 0);
 176         usb_set_idle(dev, interface->bInterfaceNumber, 0, 0);
 177
 178         if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL))) return NULL;
 179         memset(kbd, 0, sizeof(struct usb_kbd));
 180
 181         kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
 182         kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);
 183
 184         for (i = 0; i < 255; i++)
 185                 set_bit(usb_kbd_keycode[i], kbd->dev.keybit);
 186         clear_bit(0, kbd->dev.keybit);
 187
 188         kbd->dev.private = kbd;
 189         kbd->dev.event = usb_kbd_event;
 190         kbd->dev.open = usb_kbd_open;
 191         kbd->dev.close = usb_kbd_close;
 192
 193         FILL_INT_URB(&kbd->irq, dev, pipe, kbd->new, maxp > 8 ? 8 : maxp,
 194                 usb_kbd_irq, kbd, endpoint->bInterval);
 195
 196         kbd->dr.requesttype = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 197         kbd->dr.request = USB_REQ_SET_REPORT;
 198         kbd->dr.value = 0x200;
 199         kbd->dr.index = interface->bInterfaceNumber;
 200         kbd->dr.length = 1;
 201
 202         kbd->dev.name = kbd->name;
 203         kbd->dev.idbus = BUS_USB;
 204         kbd->dev.idvendor = dev->descriptor.idVendor;
 205         kbd->dev.idproduct = dev->descriptor.idProduct;
 206         kbd->dev.idversion = dev->descriptor.bcdDevice;
 207
 208         if (!(buf = kmalloc(63, GFP_KERNEL))) {
 209                 kfree(kbd);
 210                 return NULL;
 211         }
 212
 213         if (dev->descriptor.iManufacturer &&
 214                 usb_string(dev, dev->descriptor.iManufacturer, buf, 63) > 0)
 215                         strcat(kbd->name, buf);
 216         if (dev->descriptor.iProduct &&
 217                 usb_string(dev, dev->descriptor.iProduct, buf, 63) > 0)
 218                         sprintf(kbd->name, "%s %s", kbd->name, buf);
 219
 220         if (!strlen(kbd->name))
 221                 sprintf(kbd->name, "USB HIDBP Keyboard %04x:%04x",
 222                         kbd->dev.idvendor, kbd->dev.idproduct);
 223
 224         kfree(buf);
 225
 226         FILL_CONTROL_URB(&kbd->led, dev, usb_sndctrlpipe(dev, 0),
 227                 (void*) &kbd->dr, &kbd->leds, 1, usb_kbd_led, kbd);
 228
 229         input_register_device(&kbd->dev);
 230
 231         printk(KERN_INFO "input%d: %s on on usb%d:%d.%d\n",
 232                  kbd->dev.number, kbd->name, dev->bus->busnum, dev->devnum, ifnum);
 233
 234         return kbd;
 235 }
 236
 237 static void usb_kbd_disconnect(struct usb_device *dev, void *ptr)
 238 {
 239         struct usb_kbd *kbd = ptr;
 240         usb_unlink_urb(&kbd->irq);
 241         input_unregister_device(&kbd->dev);
 242         kfree(kbd);
 243 }
 244
 245 static struct usb_driver usb_kbd_driver = {
 246         name:           "keyboard",
 247         probe:          usb_kbd_probe,
 248         disconnect:     usb_kbd_disconnect
 249 };
 250
 251 static int __init usb_kbd_init(void)
 252 {
 253         usb_register(&usb_kbd_driver);
 254         return 0;
 255 }
 256
 257 static void __exit usb_kbd_exit(void)
 258 {
 259         usb_deregister(&usb_kbd_driver);
 260 }
 261
 262 module_init(usb_kbd_init);
 263 module_exit(usb_kbd_exit);