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
54MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
55MODULE_DESCRIPTION("Atari keyboard driver");
56MODULE_LICENSE("GPL");
57
58static unsigned char atakbd_keycode[0x72];
59
60static struct input_dev *atakbd_dev;
61
62static 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
85static 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
127static void __exit atakbd_exit(void)
128{
129	atari_input_keyboard_interrupt_hook = NULL;
130	input_unregister_device(atakbd_dev);
131}
132
133module_init(atakbd_init);
134module_exit(atakbd_exit);
135