amikbd.c revision d1659fcc59b21ec442564fedb67a5ad371f82380 
1/*
2 *  Copyright (c) 2000-2001 Vojtech Pavlik
3 *
4 *  Based on the work of:
5 *	Hamish Macdonald
6 */
7
8/*
9 * Amiga keyboard driver for Linux/m68k
10 */
11
12/*
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.
17 *
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.
22 *
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
26 *
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
30 */
31
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
39#include <asm/amigaints.h>
40#include <asm/amigahw.h>
41#include <asm/irq.h>
42
43MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
44MODULE_DESCRIPTION("Amiga keyboard driver");
45MODULE_LICENSE("GPL");
46
47static unsigned char amikbd_keycode[0x78] __initdata = {
48	[0]	 = KEY_GRAVE,
49	[1]	 = KEY_1,
50	[2]	 = KEY_2,
51	[3]	 = KEY_3,
52	[4]	 = KEY_4,
53	[5]	 = KEY_5,
54	[6]	 = KEY_6,
55	[7]	 = KEY_7,
56	[8]	 = KEY_8,
57	[9]	 = KEY_9,
58	[10]	 = KEY_0,
59	[11]	 = KEY_MINUS,
60	[12]	 = KEY_EQUAL,
61	[13]	 = KEY_BACKSLASH,
62	[15]	 = KEY_KP0,
63	[16]	 = KEY_Q,
64	[17]	 = KEY_W,
65	[18]	 = KEY_E,
66	[19]	 = KEY_R,
67	[20]	 = KEY_T,
68	[21]	 = KEY_Y,
69	[22]	 = KEY_U,
70	[23]	 = KEY_I,
71	[24]	 = KEY_O,
72	[25]	 = KEY_P,
73	[26]	 = KEY_LEFTBRACE,
74	[27]	 = KEY_RIGHTBRACE,
75	[29]	 = KEY_KP1,
76	[30]	 = KEY_KP2,
77	[31]	 = KEY_KP3,
78	[32]	 = KEY_A,
79	[33]	 = KEY_S,
80	[34]	 = KEY_D,
81	[35]	 = KEY_F,
82	[36]	 = KEY_G,
83	[37]	 = KEY_H,
84	[38]	 = KEY_J,
85	[39]	 = KEY_K,
86	[40]	 = KEY_L,
87	[41]	 = KEY_SEMICOLON,
88	[42]	 = KEY_APOSTROPHE,
89	[43]	 = KEY_BACKSLASH,
90	[45]	 = KEY_KP4,
91	[46]	 = KEY_KP5,
92	[47]	 = KEY_KP6,
93	[48]	 = KEY_102ND,
94	[49]	 = KEY_Z,
95	[50]	 = KEY_X,
96	[51]	 = KEY_C,
97	[52]	 = KEY_V,
98	[53]	 = KEY_B,
99	[54]	 = KEY_N,
100	[55]	 = KEY_M,
101	[56]	 = KEY_COMMA,
102	[57]	 = KEY_DOT,
103	[58]	 = KEY_SLASH,
104	[60]	 = KEY_KPDOT,
105	[61]	 = KEY_KP7,
106	[62]	 = KEY_KP8,
107	[63]	 = KEY_KP9,
108	[64]	 = KEY_SPACE,
109	[65]	 = KEY_BACKSPACE,
110	[66]	 = KEY_TAB,
111	[67]	 = KEY_KPENTER,
112	[68]	 = KEY_ENTER,
113	[69]	 = KEY_ESC,
114	[70]	 = KEY_DELETE,
115	[74]	 = KEY_KPMINUS,
116	[76]	 = KEY_UP,
117	[77]	 = KEY_DOWN,
118	[78]	 = KEY_RIGHT,
119	[79]	 = KEY_LEFT,
120	[80]	 = KEY_F1,
121	[81]	 = KEY_F2,
122	[82]	 = KEY_F3,
123	[83]	 = KEY_F4,
124	[84]	 = KEY_F5,
125	[85]	 = KEY_F6,
126	[86]	 = KEY_F7,
127	[87]	 = KEY_F8,
128	[88]	 = KEY_F9,
129	[89]	 = KEY_F10,
130	[90]	 = KEY_KPLEFTPAREN,
131	[91]	 = KEY_KPRIGHTPAREN,
132	[92]	 = KEY_KPSLASH,
133	[93]	 = KEY_KPASTERISK,
134	[94]	 = KEY_KPPLUS,
135	[95]	 = KEY_HELP,
136	[96]	 = KEY_LEFTSHIFT,
137	[97]	 = KEY_RIGHTSHIFT,
138	[98]	 = KEY_CAPSLOCK,
139	[99]	 = KEY_LEFTCTRL,
140	[100]	 = KEY_LEFTALT,
141	[101]	 = KEY_RIGHTALT,
142	[102]	 = KEY_LEFTMETA,
143	[103]	 = KEY_RIGHTMETA
144};
145
146static 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"
155};
156
157static struct input_dev *amikbd_dev;
158
159static irqreturn_t amikbd_interrupt(int irq, void *dummy)
160{
161	unsigned char scancode, down;
162
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 */
167
168	down = !(scancode & 1);		/* lowest bit is release bit */
169	scancode >>= 1;
170
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);
175		} else {
176			input_report_key(amikbd_dev, scancode, down);
177		}
178
179		input_sync(amikbd_dev);
180	} else				/* scancodes >= 0x78 are error codes */
181		printk(amikbd_messages[scancode - 0x78]);
182
183	return IRQ_HANDLED;
184}
185
186static int __init amikbd_init(void)
187{
188	int i, j, err;
189
190	if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
191		return -ENODEV;
192
193	if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
194		return -EBUSY;
195
196	amikbd_dev = input_allocate_device();
197	if (!amikbd_dev) {
198		printk(KERN_ERR "amikbd: not enough memory for input device\n");
199		err = -ENOMEM;
200		goto fail1;
201	}
202
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;
209
210	amikbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
211
212	for (i = 0; i < 0x78; i++)
213		set_bit(i, amikbd_dev->keybit);
214
215	for (i = 0; i < MAX_NR_KEYMAPS; i++) {
216		static u_short temp_map[NR_KEYS] __initdata;
217		if (!key_maps[i])
218			continue;
219		memset(temp_map, 0, sizeof(temp_map));
220		for (j = 0; j < 0x78; j++) {
221			if (!amikbd_keycode[j])
222				continue;
223			temp_map[j] = key_maps[i][amikbd_keycode[j]];
224		}
225		for (j = 0; j < NR_KEYS; j++) {
226			if (!temp_map[j])
227				temp_map[j] = 0xf200;
228		}
229		memcpy(key_maps[i], temp_map, sizeof(temp_map));
230	}
231	ciaa.cra &= ~0x41;	 /* serial data in, turn off TA */
232	if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
233			amikbd_interrupt)) {
234		err = -EBUSY;
235		goto fail2;
236	}
237
238	err = input_register_device(amikbd_dev);
239	if (err)
240		goto fail3;
241
242	return 0;
243
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);
247	return err;
248}
249
250static void __exit amikbd_exit(void)
251{
252	free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
253	input_unregister_device(amikbd_dev);
254	release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
255}
256
257module_init(amikbd_init);
258module_exit(amikbd_exit);
259