drivers/input/keyboard/atakbd.c

   1 /*
   2  *  atakbd.c
   3  *
   4  *  Copyright (c) 2005 Michael Schmitz
   5  *
   6  * Based on amikbd.c, which is
   7  *
   8  *  Copyright (c) 2000-2001 Vojtech Pavlik
   9  *
  10  *  Based on the work of:
  11  *      Hamish Macdonald
  12  */
  13
  14 /*
  15  * Atari keyboard driver for Linux/m68k
  16  *
  17  * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
  18  * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
  19  * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
  20  * This driver only deals with handing key events off to the input layer.
  21  */
  22
  23 /*
  24  * This program is free software; you can redistribute it and/or modify
  25  * it under the terms of the GNU General Public License as published by
  26  * the Free Software Foundation; either version 2 of the License, or
  27  * (at your option) any later version.
  28  *
  29  * This program is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  * GNU General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU General Public License
  35  * along with this program; if not, write to the Free Software
  36  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  37  *
  38  * Should you need to contact me, the author, you can do so either by
  39  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  40  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  41  */
  42
  43 #include <linux/module.h>
  44 #include <linux/init.h>
  45 #include <linux/input.h>
  46 #include <linux/delay.h>
  47 #include <linux/interrupt.h>
  48
  49 #include <asm/atariints.h>
  50 #include <asm/atarihw.h>
  51 #include <asm/atarikb.h>
  52 #include <asm/irq.h>
  53
  54 MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
  55 MODULE_DESCRIPTION("Atari keyboard driver");
  56 MODULE_LICENSE("GPL");
  57
  58 static unsigned char atakbd_keycode[0x72];
  59
  60 static struct input_dev *atakbd_dev;
  61
  62 static void atakbd_interrupt(unsigned char scancode, char down)
  63 {
  64
  65         if (scancode < 0x72) {          /* scancodes < 0xf2 are keys */
  66
  67                 // report raw events here?
  68
  69                 scancode = atakbd_keycode[scancode];
  70
  71                 if (scancode == KEY_CAPSLOCK) { /* CapsLock is a toggle switch key on Amiga */
  72                         input_report_key(atakbd_dev, scancode, 1);
  73                         input_report_key(atakbd_dev, scancode, 0);
  74                         input_sync(atakbd_dev);
  75                 } else {
  76                         input_report_key(atakbd_dev, scancode, down);
  77                         input_sync(atakbd_dev);
  78                 }
  79         } else                          /* scancodes >= 0xf2 are mouse data, most likely */
  80                 printk(KERN_INFO "atakbd: unhandled scancode %x\n", scancode);
  81
  82         return;
  83 }
  84
  85 static int __init atakbd_init(void)
  86 {
  87         int i;
  88
  89         if (!ATARIHW_PRESENT(ST_MFP))
  90                 return -EIO;
  91
  92         // TODO: request_mem_region if not done in arch code
  93
  94         if (!(atakbd_dev = input_allocate_device()))
  95                 return -ENOMEM;
  96
  97         // need to init core driver if not already done so
  98         if (atari_keyb_init())
  99                 return -ENODEV;
 100
 101         atakbd_dev->name = "Atari Keyboard";
 102         atakbd_dev->phys = "atakbd/input0";
 103         atakbd_dev->id.bustype = BUS_ATARI;
 104         atakbd_dev->id.vendor = 0x0001;
 105         atakbd_dev->id.product = 0x0001;
 106         atakbd_dev->id.version = 0x0100;
 107
 108         atakbd_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 109         atakbd_dev->keycode = atakbd_keycode;
 110         atakbd_dev->keycodesize = sizeof(unsigned char);
 111         atakbd_dev->keycodemax = ARRAY_SIZE(atakbd_keycode);
 112
 113         for (i = 1; i < 0x72; i++) {
 114                 atakbd_keycode[i] = i;
 115                 set_bit(atakbd_keycode[i], atakbd_dev->keybit);
 116         }
 117
 118         input_register_device(atakbd_dev);
 119
 120         atari_input_keyboard_interrupt_hook = atakbd_interrupt;
 121
 122         printk(KERN_INFO "input: %s at IKBD ACIA\n", atakbd_dev->name);
 123
 124         return 0;
 125 }
 126
 127 static void __exit atakbd_exit(void)
 128 {
 129         atari_input_keyboard_interrupt_hook = NULL;
 130         input_unregister_device(atakbd_dev);
 131 }
 132
 133 module_init(atakbd_init);
 134 module_exit(atakbd_exit);