1 /*
2 * $Id: amikbd.c,v 1.13 2002/02/01 16:02:24 vojtech Exp $
3 *
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 *
6 * Based on the work of:
7 * Hamish Macdonald
8 */
9
10 /*
11 * Amiga keyboard driver for Linux/m68k
12 */
13
14 /*
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.
19 *
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.
24 *
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
28 *
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
32 */
33
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>
39 #include <linux/keyboard.h>
40
41 #include <asm/amigaints.h>
42 #include <asm/amigahw.h>
43 #include <asm/irq.h>
44
45 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
46 MODULE_DESCRIPTION("Amiga keyboard driver");
47 MODULE_LICENSE("GPL");
48
49 static unsigned char amikbd_keycode[0x78] __initdata = {
50 [0] = KEY_GRAVE,
51 [1] = KEY_1,
52 [2] = KEY_2,
53 [3] = KEY_3,
54 [4] = KEY_4,
55 [5] = KEY_5,
56 [6] = KEY_6,
57 [7] = KEY_7,
58 [8] = KEY_8,
59 [9] = KEY_9,
60 [10] = KEY_0,
61 [11] = KEY_MINUS,
62 [12] = KEY_EQUAL,
63 [13] = KEY_BACKSLASH,
64 [15] = KEY_KP0,
65 [16] = KEY_Q,
66 [17] = KEY_W,
67 [18] = KEY_E,
68 [19] = KEY_R,
69 [20] = KEY_T,
70 [21] = KEY_Y,
71 [22] = KEY_U,
72 [23] = KEY_I,
73 [24] = KEY_O,
74 [25] = KEY_P,
75 [26] = KEY_LEFTBRACE,
76 [27] = KEY_RIGHTBRACE,
77 [29] = KEY_KP1,
78 [30] = KEY_KP2,
79 [31] = KEY_KP3,
80 [32] = KEY_A,
81 [33] = KEY_S,
82 [34] = KEY_D,
83 [35] = KEY_F,
84 [36] = KEY_G,
85 [37] = KEY_H,
86 [38] = KEY_J,
87 [39] = KEY_K,
88 [40] = KEY_L,
89 [41] = KEY_SEMICOLON,
90 [42] = KEY_APOSTROPHE,
91 [43] = KEY_BACKSLASH,
92 [45] = KEY_KP4,
93 [46] = KEY_KP5,
94 [47] = KEY_KP6,
95 [48] = KEY_102ND,
96 [49] = KEY_Z,
97 [50] = KEY_X,
98 [51] = KEY_C,
99 [52] = KEY_V,
100 [53] = KEY_B,
101 [54] = KEY_N,
102 [55] = KEY_M,
103 [56] = KEY_COMMA,
104 [57] = KEY_DOT,
105 [58] = KEY_SLASH,
106 [60] = KEY_KPDOT,
107 [61] = KEY_KP7,
108 [62] = KEY_KP8,
109 [63] = KEY_KP9,
110 [64] = KEY_SPACE,
111 [65] = KEY_BACKSPACE,
112 [66] = KEY_TAB,
113 [67] = KEY_KPENTER,
114 [68] = KEY_ENTER,
115 [69] = KEY_ESC,
116 [70] = KEY_DELETE,
117 [74] = KEY_KPMINUS,
118 [76] = KEY_UP,
119 [77] = KEY_DOWN,
120 [78] = KEY_RIGHT,
121 [79] = KEY_LEFT,
122 [80] = KEY_F1,
123 [81] = KEY_F2,
124 [82] = KEY_F3,
125 [83] = KEY_F4,
126 [84] = KEY_F5,
127 [85] = KEY_F6,
128 [86] = KEY_F7,
129 [87] = KEY_F8,
130 [88] = KEY_F9,
131 [89] = KEY_F10,
132 [90] = KEY_KPLEFTPAREN,
133 [91] = KEY_KPRIGHTPAREN,
134 [92] = KEY_KPSLASH,
135 [93] = KEY_KPASTERISK,
136 [94] = KEY_KPPLUS,
137 [95] = KEY_HELP,
138 [96] = KEY_LEFTSHIFT,
139 [97] = KEY_RIGHTSHIFT,
140 [98] = KEY_CAPSLOCK,
141 [99] = KEY_LEFTCTRL,
142 [100] = KEY_LEFTALT,
143 [101] = KEY_RIGHTALT,
144 [102] = KEY_LEFTMETA,
145 [103] = KEY_RIGHTMETA
146 };
147
148 static const char *amikbd_messages[8] = {
149 [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
150 [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
151 [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
152 [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
153 [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
154 [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
155 [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
156 [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
157 };
158
159 static struct input_dev *amikbd_dev;
160
161 static irqreturn_t amikbd_interrupt(int irq, void *dummy)
162 {
163 unsigned char scancode, down;
164
165 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
166 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
167 udelay(85); /* wait until 85 us have expired */
168 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
169
170 down = !(scancode & 1); /* lowest bit is release bit */
171 scancode >>= 1;
172
173 if (scancode < 0x78) { /* scancodes < 0x78 are keys */
174 if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */
175 input_report_key(amikbd_dev, scancode, 1);
176 input_report_key(amikbd_dev, scancode, 0);
177 } else {
178 input_report_key(amikbd_dev, scancode, down);
179 }
180
181 input_sync(amikbd_dev);
182 } else /* scancodes >= 0x78 are error codes */
183 printk(amikbd_messages[scancode - 0x78]);
184
185 return IRQ_HANDLED;
186 }
187
188 static int __init amikbd_init(void)
189 {
190 int i, j, err;
191
192 if (!AMIGAHW_PRESENT(AMI_KEYBOARD))
193 return -ENODEV;
194
195 if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))
196 return -EBUSY;
197
198 amikbd_dev = input_allocate_device();
199 if (!amikbd_dev) {
200 printk(KERN_ERR "amikbd: not enough memory for input device\n");
201 err = -ENOMEM;
202 goto fail1;
203 }
204
205 amikbd_dev->name = "Amiga Keyboard";
206 amikbd_dev->phys = "amikbd/input0";
207 amikbd_dev->id.bustype = BUS_AMIGA;
208 amikbd_dev->id.vendor = 0x0001;
209 amikbd_dev->id.product = 0x0001;
210 amikbd_dev->id.version = 0x0100;
211
212 amikbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
213
214 for (i = 0; i < 0x78; i++)
215 set_bit(i, amikbd_dev->keybit);
216
217 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
218 static u_short temp_map[NR_KEYS] __initdata;
219 if (!key_maps[i])
220 continue;
221 memset(temp_map, 0, sizeof(temp_map));
222 for (j = 0; j < 0x78; j++) {
223 if (!amikbd_keycode[j])
224 continue;
225 temp_map[j] = key_maps[i][amikbd_keycode[j]];
226 }
227 for (j = 0; j < NR_KEYS; j++) {
228 if (!temp_map[j])
229 temp_map[j] = 0xf200;
230 }
231 memcpy(key_maps[i], temp_map, sizeof(temp_map));
232 }
233 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
234 if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
235 amikbd_interrupt)) {
236 err = -EBUSY;
237 goto fail2;
238 }
239
240 err = input_register_device(amikbd_dev);
241 if (err)
242 goto fail3;
243
244 return 0;
245
246 fail3: free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
247 fail2: input_free_device(amikbd_dev);
248 fail1: release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
249 return err;
250 }
251
252 static void __exit amikbd_exit(void)
253 {
254 free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);
255 input_unregister_device(amikbd_dev);
256 release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);
257 }
258
259 module_init(amikbd_init);
260 module_exit(amikbd_exit);
261
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