drivers/input/keyboard/xtkbd.c

   1 /*
   2  * $Id: xtkbd.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * XT keyboard driver for Linux
   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@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/slab.h>
  32 #include <linux/module.h>
  33 #include <linux/input.h>
  34 #include <linux/init.h>
  35 #include <linux/serio.h>
  36
  37 #define DRIVER_DESC     "XT keyboard driver"
  38
  39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  40 MODULE_DESCRIPTION(DRIVER_DESC);
  41 MODULE_LICENSE("GPL");
  42
  43 #define XTKBD_EMUL0     0xe0
  44 #define XTKBD_EMUL1     0xe1
  45 #define XTKBD_KEY       0x7f
  46 #define XTKBD_RELEASE   0x80
  47
  48 static unsigned char xtkbd_keycode[256] = {
  49           0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  50          16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  51          32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  52          48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
  53          64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
  54          80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
  55           0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
  56         106
  57 };
  58
  59 static char *xtkbd_name = "XT Keyboard";
  60
  61 struct xtkbd {
  62         unsigned char keycode[256];
  63         struct input_dev dev;
  64         struct serio *serio;
  65         char phys[32];
  66 };
  67
  68 static irqreturn_t xtkbd_interrupt(struct serio *serio,
  69         unsigned char data, unsigned int flags, struct pt_regs *regs)
  70 {
  71         struct xtkbd *xtkbd = serio_get_drvdata(serio);
  72
  73         switch (data) {
  74                 case XTKBD_EMUL0:
  75                 case XTKBD_EMUL1:
  76                         break;
  77                 default:
  78
  79                         if (xtkbd->keycode[data & XTKBD_KEY]) {
  80                                 input_regs(&xtkbd->dev, regs);
  81                                 input_report_key(&xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
  82                                 input_sync(&xtkbd->dev);
  83                         } else {
  84                                 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
  85                                         data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
  86                         }
  87         }
  88         return IRQ_HANDLED;
  89 }
  90
  91 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
  92 {
  93         struct xtkbd *xtkbd;
  94         int i;
  95         int err;
  96
  97         if (!(xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL)))
  98                 return -ENOMEM;
  99
 100         memset(xtkbd, 0, sizeof(struct xtkbd));
 101
 102         xtkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 103
 104         xtkbd->serio = serio;
 105
 106         init_input_dev(&xtkbd->dev);
 107         xtkbd->dev.keycode = xtkbd->keycode;
 108         xtkbd->dev.keycodesize = sizeof(unsigned char);
 109         xtkbd->dev.keycodemax = ARRAY_SIZE(xtkbd_keycode);
 110         xtkbd->dev.private = xtkbd;
 111
 112         serio_set_drvdata(serio, xtkbd);
 113
 114         err = serio_open(serio, drv);
 115         if (err) {
 116                 serio_set_drvdata(serio, NULL);
 117                 kfree(xtkbd);
 118                 return err;
 119         }
 120
 121         memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
 122         for (i = 0; i < 255; i++)
 123                 set_bit(xtkbd->keycode[i], xtkbd->dev.keybit);
 124         clear_bit(0, xtkbd->dev.keybit);
 125
 126         sprintf(xtkbd->phys, "%s/input0", serio->phys);
 127
 128         xtkbd->dev.name = xtkbd_name;
 129         xtkbd->dev.phys = xtkbd->phys;
 130         xtkbd->dev.id.bustype = BUS_XTKBD;
 131         xtkbd->dev.id.vendor = 0x0001;
 132         xtkbd->dev.id.product = 0x0001;
 133         xtkbd->dev.id.version = 0x0100;
 134         xtkbd->dev.dev = &serio->dev;
 135
 136         input_register_device(&xtkbd->dev);
 137
 138         printk(KERN_INFO "input: %s on %s\n", xtkbd_name, serio->phys);
 139
 140         return 0;
 141 }
 142
 143 static void xtkbd_disconnect(struct serio *serio)
 144 {
 145         struct xtkbd *xtkbd = serio_get_drvdata(serio);
 146
 147         input_unregister_device(&xtkbd->dev);
 148         serio_close(serio);
 149         serio_set_drvdata(serio, NULL);
 150         kfree(xtkbd);
 151 }
 152
 153 static struct serio_device_id xtkbd_serio_ids[] = {
 154         {
 155                 .type   = SERIO_XT,
 156                 .proto  = SERIO_ANY,
 157                 .id     = SERIO_ANY,
 158                 .extra  = SERIO_ANY,
 159         },
 160         { 0 }
 161 };
 162
 163 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
 164
 165 static struct serio_driver xtkbd_drv = {
 166         .driver         = {
 167                 .name   = "xtkbd",
 168         },
 169         .description    = DRIVER_DESC,
 170         .id_table       = xtkbd_serio_ids,
 171         .interrupt      = xtkbd_interrupt,
 172         .connect        = xtkbd_connect,
 173         .disconnect     = xtkbd_disconnect,
 174 };
 175
 176 static int __init xtkbd_init(void)
 177 {
 178         serio_register_driver(&xtkbd_drv);
 179         return 0;
 180 }
 181
 182 static void __exit xtkbd_exit(void)
 183 {
 184         serio_unregister_driver(&xtkbd_drv);
 185 }
 186
 187 module_init(xtkbd_init);
 188 module_exit(xtkbd_exit);