2 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Based on the work of:
9 * Amiga keyboard driver for Linux/m68k
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
32 #include <linux/module.h>
33 #include <linux/init.h>
34 #include <linux/input.h>
35 #include <linux/delay.h>
36 #include <linux/interrupt.h>
37 #include <linux/keyboard.h>
39 #include <asm/amigaints.h>
40 #include <asm/amigahw.h>
43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
44 MODULE_DESCRIPTION("Amiga keyboard driver");
45 MODULE_LICENSE("GPL");
47 static unsigned char amikbd_keycode[0x78] __initdata = {
74 [27] = KEY_RIGHTBRACE,
88 [42] = KEY_APOSTROPHE,
109 [65] = KEY_BACKSPACE,
130 [90] = KEY_KPLEFTPAREN,
131 [91] = KEY_KPRIGHTPAREN,
133 [93] = KEY_KPASTERISK,
136 [96] = KEY_LEFTSHIFT,
137 [97] = KEY_RIGHTSHIFT,
141 [101] = KEY_RIGHTALT,
142 [102] = KEY_LEFTMETA,
143 [103] = KEY_RIGHTMETA
146 static const char *amikbd_messages[8] = {
147 [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
148 [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
149 [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
150 [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
151 [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
152 [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
153 [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
154 [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
157 static struct input_dev *amikbd_dev;
159 static irqreturn_t amikbd_interrupt(int irq, void *dummy)
161 unsigned char scancode, down;
163 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
164 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
165 udelay(85); /* wait until 85 us have expired */
166 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
168 down = !(scancode & 1); /* lowest bit is release bit */
171 if (scancode < 0x78) { /* scancodes < 0x78 are keys */
172 if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */
173 input_report_key(amikbd_dev, scancode, 1);
174 input_report_key(amikbd_dev, scancode, 0);
176 input_report_key(amikbd_dev, scancode, down);
179 input_sync(amikbd_dev);
180 } else /* scancodes >= 0x78 are error codes */
181 printk(amikbd_messages[scancode - 0x78]);
186 static int __init amikbd_init(void)
190 if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
193 if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
196 amikbd_dev = input_allocate_device();
198 printk(KERN_ERR "amikbd: not enough memory for input device\n");
203 amikbd_dev->name = "Amiga Keyboard";
204 amikbd_dev->phys = "amikbd/input0";
205 amikbd_dev->id.bustype = BUS_AMIGA;
206 amikbd_dev->id.vendor = 0x0001;
207 amikbd_dev->id.product = 0x0001;
208 amikbd_dev->id.version = 0x0100;
210 amikbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
212 for (i = 0; i < 0x78; i++)
213 set_bit(i, amikbd_dev->keybit);
215 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
216 static u_short temp_map[NR_KEYS] __initdata;
219 memset(temp_map, 0, sizeof(temp_map));
220 for (j = 0; j < 0x78; j++) {
221 if (!amikbd_keycode[j])
223 temp_map[j] = key_maps[i][amikbd_keycode[j]];
225 for (j = 0; j < NR_KEYS; j++) {
227 temp_map[j] = 0xf200;
229 memcpy(key_maps[i], temp_map, sizeof(temp_map));
231 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
232 if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
238 err = input_register_device(amikbd_dev);
244 fail3: free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
245 fail2: input_free_device(amikbd_dev);
246 fail1: release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
250 static void __exit amikbd_exit(void)
252 free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
253 input_unregister_device(amikbd_dev);
254 release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
257 module_init(amikbd_init);
258 module_exit(amikbd_exit);