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
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>
38 #include <linux/platform_device.h>
40 #include <asm/amigaints.h>
41 #include <asm/amigahw.h>
45 MODULE_DESCRIPTION("Amiga keyboard driver");
46 MODULE_LICENSE("GPL");
48 static unsigned char amikbd_keycode[0x78] __initdata = {
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 irqreturn_t amikbd_interrupt(int irq, void *data)
160 struct input_dev *dev = data;
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(dev, scancode, 1);
174 input_report_key(dev, scancode, 0);
176 input_report_key(dev, scancode, down);
180 } else /* scancodes >= 0x78 are error codes */
181 printk(amikbd_messages[scancode - 0x78]);
186 static int __init amikbd_probe(struct platform_device *pdev)
188 struct input_dev *dev;
191 dev = input_allocate_device();
193 dev_err(&pdev->dev, "Not enough memory for input device\n");
197 dev->name = pdev->name;
198 dev->phys = "amikbd/input0";
199 dev->id.bustype = BUS_AMIGA;
200 dev->id.vendor = 0x0001;
201 dev->id.product = 0x0001;
202 dev->id.version = 0x0100;
203 dev->dev.parent = &pdev->dev;
205 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
207 for (i = 0; i < 0x78; i++)
208 set_bit(i, dev->keybit);
210 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
211 static u_short temp_map[NR_KEYS] __initdata;
214 memset(temp_map, 0, sizeof(temp_map));
215 for (j = 0; j < 0x78; j++) {
216 if (!amikbd_keycode[j])
218 temp_map[j] = key_maps[i][amikbd_keycode[j]];
220 for (j = 0; j < NR_KEYS; j++) {
222 temp_map[j] = 0xf200;
224 memcpy(key_maps[i], temp_map, sizeof(temp_map));
226 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
227 err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
232 err = input_register_device(dev);
236 platform_set_drvdata(pdev, dev);
240 fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
241 fail2: input_free_device(dev);
245 static int __exit amikbd_remove(struct platform_device *pdev)
247 struct input_dev *dev = platform_get_drvdata(pdev);
249 platform_set_drvdata(pdev, NULL);
250 free_irq(IRQ_AMIGA_CIAA_SP, dev);
251 input_unregister_device(dev);
255 static struct platform_driver amikbd_driver = {
256 .remove = __exit_p(amikbd_remove),
258 .name = "amiga-keyboard",
259 .owner = THIS_MODULE,
263 static int __init amikbd_init(void)
265 return platform_driver_probe(&amikbd_driver, amikbd_probe);
268 module_init(amikbd_init);
270 static void __exit amikbd_exit(void)
272 platform_driver_unregister(&amikbd_driver);
275 module_exit(amikbd_exit);
277 MODULE_ALIAS("platform:amiga-keyboard");