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/serio.h>
  33
  34 #define DRIVER_DESC     "XT keyboard driver"
  35
  36 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  37 MODULE_DESCRIPTION(DRIVER_DESC);
  38 MODULE_LICENSE("GPL");
  39
  40 #define XTKBD_EMUL0     0xe0
  41 #define XTKBD_EMUL1     0xe1
  42 #define XTKBD_KEY       0x7f
  43 #define XTKBD_RELEASE   0x80
  44
  45 static unsigned char xtkbd_keycode[256] = {
  46           0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  47          16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
  48          32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  49          48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
  50          64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
  51          80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
  52           0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
  53         106
  54 };
  55
  56 struct xtkbd {
  57         unsigned char keycode[256];
  58         struct input_dev *dev;
  59         struct serio *serio;
  60         char phys[32];
  61 };
  62
  63 static irqreturn_t xtkbd_interrupt(struct serio *serio,
  64         unsigned char data, unsigned int flags)
  65 {
  66         struct xtkbd *xtkbd = serio_get_drvdata(serio);
  67
  68         switch (data) {
  69                 case XTKBD_EMUL0:
  70                 case XTKBD_EMUL1:
  71                         break;
  72                 default:
  73
  74                         if (xtkbd->keycode[data & XTKBD_KEY]) {
  75                                 input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
  76                                 input_sync(xtkbd->dev);
  77                         } else {
  78                                 printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
  79                                         data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
  80                         }
  81         }
  82         return IRQ_HANDLED;
  83 }
  84
  85 static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)
  86 {
  87         struct xtkbd *xtkbd;
  88         struct input_dev *input_dev;
  89         int err = -ENOMEM;
  90         int i;
  91
  92         xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);
  93         input_dev = input_allocate_device();
  94         if (!xtkbd || !input_dev)
  95                 goto fail1;
  96
  97         xtkbd->serio = serio;
  98         xtkbd->dev = input_dev;
  99         snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys);
 100         memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
 101
 102         input_dev->name = "XT Keyboard";
 103         input_dev->phys = xtkbd->phys;
 104         input_dev->id.bustype = BUS_XTKBD;
 105         input_dev->id.vendor  = 0x0001;
 106         input_dev->id.product = 0x0001;
 107         input_dev->id.version = 0x0100;
 108         input_dev->dev.parent = &serio->dev;
 109
 110         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 111         input_dev->keycode = xtkbd->keycode;
 112         input_dev->keycodesize = sizeof(unsigned char);
 113         input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);
 114
 115         for (i = 0; i < 255; i++)
 116                 set_bit(xtkbd->keycode[i], input_dev->keybit);
 117         clear_bit(0, input_dev->keybit);
 118
 119         serio_set_drvdata(serio, xtkbd);
 120
 121         err = serio_open(serio, drv);
 122         if (err)
 123                 goto fail2;
 124
 125         err = input_register_device(xtkbd->dev);
 126         if (err)
 127                 goto fail3;
 128
 129         return 0;
 130
 131  fail3: serio_close(serio);
 132  fail2: serio_set_drvdata(serio, NULL);
 133  fail1: input_free_device(input_dev);
 134         kfree(xtkbd);
 135         return err;
 136 }
 137
 138 static void xtkbd_disconnect(struct serio *serio)
 139 {
 140         struct xtkbd *xtkbd = serio_get_drvdata(serio);
 141
 142         serio_close(serio);
 143         serio_set_drvdata(serio, NULL);
 144         input_unregister_device(xtkbd->dev);
 145         kfree(xtkbd);
 146 }
 147
 148 static struct serio_device_id xtkbd_serio_ids[] = {
 149         {
 150                 .type   = SERIO_XT,
 151                 .proto  = SERIO_ANY,
 152                 .id     = SERIO_ANY,
 153                 .extra  = SERIO_ANY,
 154         },
 155         { 0 }
 156 };
 157
 158 MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);
 159
 160 static struct serio_driver xtkbd_drv = {
 161         .driver         = {
 162                 .name   = "xtkbd",
 163         },
 164         .description    = DRIVER_DESC,
 165         .id_table       = xtkbd_serio_ids,
 166         .interrupt      = xtkbd_interrupt,
 167         .connect        = xtkbd_connect,
 168         .disconnect     = xtkbd_disconnect,
 169 };
 170
 171 module_serio_driver(xtkbd_drv);