2 * $Id: amikbd.c,v 1.13 2002/02/01 16:02:24 vojtech Exp $
4 * Copyright (c) 2000-2001 Vojtech Pavlik
6 * Based on the work of:
11 * Amiga keyboard driver for Linux/m68k
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Should you need to contact me, the author, you can do so either by
30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/input.h>
37 #include <linux/delay.h>
38 #include <linux/interrupt.h>
40 #include <asm/amigaints.h>
41 #include <asm/amigahw.h>
44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
45 MODULE_DESCRIPTION("Amiga keyboard driver");
46 MODULE_LICENSE("GPL");
48 static unsigned char amikbd_keycode[0x78] = {
75 [27] = KEY_RIGHTBRACE,
89 [42] = KEY_APOSTROPHE,
110 [65] = KEY_BACKSPACE,
131 [90] = KEY_KPLEFTPAREN,
132 [91] = KEY_KPRIGHTPAREN,
134 [93] = KEY_KPASTERISK,
137 [96] = KEY_LEFTSHIFT,
138 [97] = KEY_RIGHTSHIFT,
142 [101] = KEY_RIGHTALT,
143 [102] = KEY_LEFTMETA,
144 [103] = KEY_RIGHTMETA
147 static const char *amikbd_messages[8] = {
148 [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
149 [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
150 [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
151 [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
152 [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
153 [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
154 [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
155 [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
158 static struct input_dev *amikbd_dev;
160 static irqreturn_t amikbd_interrupt(int irq, void *dummy, struct pt_regs *fp)
162 unsigned char scancode, down;
164 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
165 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
166 udelay(85); /* wait until 85 us have expired */
167 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
169 down = !(scancode & 1); /* lowest bit is release bit */
172 if (scancode < 0x78) { /* scancodes < 0x78 are keys */
174 scancode = amikbd_keycode[scancode];
176 input_regs(amikbd_dev, fp);
178 if (scancode == KEY_CAPSLOCK) { /* CapsLock is a toggle switch key on Amiga */
179 input_report_key(amikbd_dev, scancode, 1);
180 input_report_key(amikbd_dev, scancode, 0);
182 input_report_key(amikbd_dev, scancode, down);
185 input_sync(amikbd_dev);
186 } else /* scancodes >= 0x78 are error codes */
187 printk(amikbd_messages[scancode - 0x78]);
192 static int __init amikbd_init(void)
196 if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
199 if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
202 amikbd_dev = input_allocate_device();
204 printk(KERN_ERR "amikbd: not enough memory for input device\n");
205 release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
209 amikbd_dev->name = "Amiga Keyboard";
210 amikbd_dev->phys = "amikbd/input0";
211 amikbd_dev->id.bustype = BUS_AMIGA;
212 amikbd_dev->id.vendor = 0x0001;
213 amikbd_dev->id.product = 0x0001;
214 amikbd_dev->id.version = 0x0100;
216 amikbd_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
217 amikbd_dev->keycode = amikbd_keycode;
218 amikbd_dev->keycodesize = sizeof(unsigned char);
219 amikbd_dev->keycodemax = ARRAY_SIZE(amikbd_keycode);
221 for (i = 0; i < 0x78; i++)
222 if (amikbd_keycode[i])
223 set_bit(amikbd_keycode[i], amikbd_dev->keybit);
225 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
226 request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd", amikbd_interrupt);
228 input_register_device(amikbd_dev);
232 static void __exit amikbd_exit(void)
234 free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
235 input_unregister_device(amikbd_dev);
236 release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
239 module_init(amikbd_init);
240 module_exit(amikbd_exit);