drivers/input/keyboard/xtkbd.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  */
   4
   5 /*
   6  * XT keyboard driver for Linux
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/slab.h>
  30 #include <linux/module.h>
  31 #include <linux/input.h>
  32 #include <linux/init.h>
  33 #include <linux/serio.h>
  34
  35 #define DRIVER_DESC     "XT keyboard driver"
  36
  37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  38 MODULE_DESCRIPTION(DRIVER_DESC);
  39 MODULE_LICENSE("GPL");
  40
  41 #define XTKBD_EMUL0     0xe0
  42 #define XTKBD_EMUL1     0xe1
  43 #define XTKBD_KEY       0x7f
  44 #define XTKBD_RELEASE   0x80
  45
  46 static unsigned char xtkbd_keycode[256] = {
  47           0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  48          16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  49          32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  50          48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
  51          64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
  52          80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
  53           0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
  54         106
  55 };
  56
  57 struct xtkbd {
  58         unsigned char keycode[256];
  59         struct input_dev *dev;
  60         struct serio *serio;
  61         char phys[32];
  62 };
  63
  64 static irqreturn_t xtkbd_interrupt(struct serio *serio,
  65         unsigned char data, unsigned int flags)
  66 {
  67         struct xtkbd *xtkbd = serio_get_drvdata(serio);
  68
  69         switch (data) {
  70                 case XTKBD_EMUL0:
  71                 case XTKBD_EMUL1:
  72                         break;
  73                 default:
  74
  75                         if (xtkbd->keycode[data & XTKBD_KEY]) {
  76                                 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
  77                                 input_sync(xtkbd->dev);
  78                         } else {
  79                                 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
  80                                         data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
  81                         }
  82         }
  83         return IRQ_HANDLED;
  84 }
  85
  86 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
  87 {
  88         struct xtkbd *xtkbd;
  89         struct input_dev *input_dev;
  90         int err = -ENOMEM;
  91         int i;
  92
  93         xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
  94         input_dev = input_allocate_device();
  95         if (!xtkbd || !input_dev)
  96                 goto fail1;
  97
  98         xtkbd->serio = serio;
  99         xtkbd->dev = input_dev;
 100         snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
 101         memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
 102
 103         input_dev->name = "XT Keyboard";
 104         input_dev->phys = xtkbd->phys;
 105         input_dev->id.bustype = BUS_XTKBD;
 106         input_dev->id.vendor  = 0x0001;
 107         input_dev->id.product = 0x0001;
 108         input_dev->id.version = 0x0100;
 109         input_dev->dev.parent = &serio->dev;
 110
 111         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 112         input_dev->keycode = xtkbd->keycode;
 113         input_dev->keycodesize = sizeof(unsigned char);
 114         input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
 115
 116         for (i = 0; i < 255; i++)
 117                 set_bit(xtkbd->keycode[i], input_dev->keybit);
 118         clear_bit(0, input_dev->keybit);
 119
 120         serio_set_drvdata(serio, xtkbd);
 121
 122         err = serio_open(serio, drv);
 123         if (err)
 124                 goto fail2;
 125
 126         err = input_register_device(xtkbd->dev);
 127         if (err)
 128                 goto fail3;
 129
 130         return 0;
 131
 132  fail3: serio_close(serio);
 133  fail2: serio_set_drvdata(serio, NULL);
 134  fail1: 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         return serio_register_driver(&xtkbd_drv);
 175 }
 176
 177 static void __exit xtkbd_exit(void)
 178 {
 179         serio_unregister_driver(&xtkbd_drv);
 180 }
 181
 182 module_init(xtkbd_init);
 183 module_exit(xtkbd_exit);