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 char *amikbd_name = "Amiga keyboard";
161 static char *amikbd_phys = "amikbd/input0";
163 static irqreturn_t amikbd_interrupt(int irq, void *dummy, struct pt_regs *fp)
165 unsigned char scancode, down;
167 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
168 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
169 udelay(85); /* wait until 85 us have expired */
170 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
172 down = !(scancode & 1); /* lowest bit is release bit */
175 if (scancode < 0x78) { /* scancodes < 0x78 are keys */
177 scancode = amikbd_keycode[scancode];
179 input_regs(&amikbd_dev, fp);
181 if (scancode == KEY_CAPSLOCK) { /* CapsLock is a toggle switch key on Amiga */
182 input_report_key(&amikbd_dev, scancode, 1);
183 input_report_key(&amikbd_dev, scancode, 0);
184 input_sync(&amikbd_dev);
186 input_report_key(&amikbd_dev, scancode, down);
187 input_sync(&amikbd_dev);
189 } else /* scancodes >= 0x78 are error codes */
190 printk(amikbd_messages[scancode - 0x78]);
195 static int __init amikbd_init(void)
199 if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
202 if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
205 init_input_dev(&amikbd_dev);
207 amikbd_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
208 amikbd_dev.keycode = amikbd_keycode;
209 amikbd_dev.keycodesize = sizeof(unsigned char);
210 amikbd_dev.keycodemax = ARRAY_SIZE(amikbd_keycode);
212 for (i = 0; i < 0x78; i++)
213 if (amikbd_keycode[i])
214 set_bit(amikbd_keycode[i], amikbd_dev.keybit);
216 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
217 request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd", amikbd_interrupt);
219 amikbd_dev.name = amikbd_name;
220 amikbd_dev.phys = amikbd_phys;
221 amikbd_dev.id.bustype = BUS_AMIGA;
222 amikbd_dev.id.vendor = 0x0001;
223 amikbd_dev.id.product = 0x0001;
224 amikbd_dev.id.version = 0x0100;
226 input_register_device(&amikbd_dev);
228 printk(KERN_INFO "input: %s\n", amikbd_name);
233 static void __exit amikbd_exit(void)
235 input_unregister_device(&amikbd_dev);
236 free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
237 release_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100);
240 module_init(amikbd_init);
241 module_exit(amikbd_exit);