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 struct xtkbd {
  60         unsigned char keycode[256];
  61         struct input_dev *dev;
  62         struct serio *serio;
  63         char phys[32];
  64 };
  65
  66 static irqreturn_t xtkbd_interrupt(struct serio *serio,
  67         unsigned char data, unsigned int flags, struct pt_regs *regs)
  68 {
  69         struct xtkbd *xtkbd = serio_get_drvdata(serio);
  70
  71         switch (data) {
  72                 case XTKBD_EMUL0:
  73                 case XTKBD_EMUL1:
  74                         break;
  75                 default:
  76
  77                         if (xtkbd->keycode[data & XTKBD_KEY]) {
  78                                 input_regs(xtkbd->dev, regs);
  79                                 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
  80                                 input_sync(xtkbd->dev);
  81                         } else {
  82                                 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
  83                                         data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
  84                         }
  85         }
  86         return IRQ_HANDLED;
  87 }
  88
  89 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
  90 {
  91         struct xtkbd *xtkbd;
  92         struct input_dev *input_dev;
  93         int err = -ENOMEM;
  94         int i;
  95
  96         xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
  97         input_dev = input_allocate_device();
  98         if (!xtkbd || !input_dev)
  99                 goto fail;
 100
 101         xtkbd->serio = serio;
 102         xtkbd->dev = input_dev;
 103         snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
 104         memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
 105
 106         input_dev->name = "XT Keyboard";
 107         input_dev->phys = xtkbd->phys;
 108         input_dev->id.bustype = BUS_XTKBD;
 109         input_dev->id.vendor  = 0x0001;
 110         input_dev->id.product = 0x0001;
 111         input_dev->id.version = 0x0100;
 112         input_dev->cdev.dev = &serio->dev;
 113         input_dev->private = xtkbd;
 114
 115         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 116         input_dev->keycode = xtkbd->keycode;
 117         input_dev->keycodesize = sizeof(unsigned char);
 118         input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
 119
 120         for (i = 0; i < 255; i++)
 121                 set_bit(xtkbd->keycode[i], input_dev->keybit);
 122         clear_bit(0, input_dev->keybit);
 123
 124         serio_set_drvdata(serio, xtkbd);
 125
 126         err = serio_open(serio, drv);
 127         if (err)
 128                 goto fail;
 129
 130         input_register_device(xtkbd->dev);
 131         return 0;
 132
 133  fail:  serio_set_drvdata(serio, NULL);
 134         input_free_device(input_dev);
 135         kfree(xtkbd);
 136         return err;
 137 }
 138
 139 static void xtkbd_disconnect(struct serio *serio)
 140 {
 141         struct xtkbd *xtkbd = serio_get_drvdata(serio);
 142
 143         serio_close(serio);
 144         serio_set_drvdata(serio, NULL);
 145         input_unregister_device(xtkbd->dev);
 146         kfree(xtkbd);
 147 }
 148
 149 static struct serio_device_id xtkbd_serio_ids[] = {
 150         {
 151                 .type   = SERIO_XT,
 152                 .proto  = SERIO_ANY,
 153                 .id     = SERIO_ANY,
 154                 .extra  = SERIO_ANY,
 155         },
 156         { 0 }
 157 };
 158
 159 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
 160
 161 static struct serio_driver xtkbd_drv = {
 162         .driver         = {
 163                 .name   = "xtkbd",
 164         },
 165         .description    = DRIVER_DESC,
 166         .id_table       = xtkbd_serio_ids,
 167         .interrupt      = xtkbd_interrupt,
 168         .connect        = xtkbd_connect,
 169         .disconnect     = xtkbd_disconnect,
 170 };
 171
 172 static int __init xtkbd_init(void)
 173 {
 174         serio_register_driver(&xtkbd_drv);
 175         return 0;
 176 }
 177
 178 static void __exit xtkbd_exit(void)
 179 {
 180         serio_unregister_driver(&xtkbd_drv);
 181 }
 182
 183 module_init(xtkbd_init);
 184 module_exit(xtkbd_exit);