summaryrefslogtreecommitdiff
path: root/drivers/input/keyboard/amikbd.c
blob: e305c44cd0aa9045f4c62f2d3a42db05552ef224 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Hamish Macdonald
 */

/*
 * Amiga keyboard driver for Linux/m68k
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/keyboard.h>
#include <linux/platform_device.h>

#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <asm/irq.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Amiga keyboard driver");
MODULE_LICENSE("GPL");

#ifdef CONFIG_HW_CONSOLE
static unsigned char amikbd_keycode[0x78] __initdata = {
	[0]	 = KEY_GRAVE,
	[1]	 = KEY_1,
	[2]	 = KEY_2,
	[3]	 = KEY_3,
	[4]	 = KEY_4,
	[5]	 = KEY_5,
	[6]	 = KEY_6,
	[7]	 = KEY_7,
	[8]	 = KEY_8,
	[9]	 = KEY_9,
	[10]	 = KEY_0,
	[11]	 = KEY_MINUS,
	[12]	 = KEY_EQUAL,
	[13]	 = KEY_BACKSLASH,
	[15]	 = KEY_KP0,
	[16]	 = KEY_Q,
	[17]	 = KEY_W,
	[18]	 = KEY_E,
	[19]	 = KEY_R,
	[20]	 = KEY_T,
	[21]	 = KEY_Y,
	[22]	 = KEY_U,
	[23]	 = KEY_I,
	[24]	 = KEY_O,
	[25]	 = KEY_P,
	[26]	 = KEY_LEFTBRACE,
	[27]	 = KEY_RIGHTBRACE,
	[29]	 = KEY_KP1,
	[30]	 = KEY_KP2,
	[31]	 = KEY_KP3,
	[32]	 = KEY_A,
	[33]	 = KEY_S,
	[34]	 = KEY_D,
	[35]	 = KEY_F,
	[36]	 = KEY_G,
	[37]	 = KEY_H,
	[38]	 = KEY_J,
	[39]	 = KEY_K,
	[40]	 = KEY_L,
	[41]	 = KEY_SEMICOLON,
	[42]	 = KEY_APOSTROPHE,
	[43]	 = KEY_BACKSLASH,
	[45]	 = KEY_KP4,
	[46]	 = KEY_KP5,
	[47]	 = KEY_KP6,
	[48]	 = KEY_102ND,
	[49]	 = KEY_Z,
	[50]	 = KEY_X,
	[51]	 = KEY_C,
	[52]	 = KEY_V,
	[53]	 = KEY_B,
	[54]	 = KEY_N,
	[55]	 = KEY_M,
	[56]	 = KEY_COMMA,
	[57]	 = KEY_DOT,
	[58]	 = KEY_SLASH,
	[60]	 = KEY_KPDOT,
	[61]	 = KEY_KP7,
	[62]	 = KEY_KP8,
	[63]	 = KEY_KP9,
	[64]	 = KEY_SPACE,
	[65]	 = KEY_BACKSPACE,
	[66]	 = KEY_TAB,
	[67]	 = KEY_KPENTER,
	[68]	 = KEY_ENTER,
	[69]	 = KEY_ESC,
	[70]	 = KEY_DELETE,
	[74]	 = KEY_KPMINUS,
	[76]	 = KEY_UP,
	[77]	 = KEY_DOWN,
	[78]	 = KEY_RIGHT,
	[79]	 = KEY_LEFT,
	[80]	 = KEY_F1,
	[81]	 = KEY_F2,
	[82]	 = KEY_F3,
	[83]	 = KEY_F4,
	[84]	 = KEY_F5,
	[85]	 = KEY_F6,
	[86]	 = KEY_F7,
	[87]	 = KEY_F8,
	[88]	 = KEY_F9,
	[89]	 = KEY_F10,
	[90]	 = KEY_KPLEFTPAREN,
	[91]	 = KEY_KPRIGHTPAREN,
	[92]	 = KEY_KPSLASH,
	[93]	 = KEY_KPASTERISK,
	[94]	 = KEY_KPPLUS,
	[95]	 = KEY_HELP,
	[96]	 = KEY_LEFTSHIFT,
	[97]	 = KEY_RIGHTSHIFT,
	[98]	 = KEY_CAPSLOCK,
	[99]	 = KEY_LEFTCTRL,
	[100]	 = KEY_LEFTALT,
	[101]	 = KEY_RIGHTALT,
	[102]	 = KEY_LEFTMETA,
	[103]	 = KEY_RIGHTMETA
};

static void __init amikbd_init_console_keymaps(void)
{
	/* We can spare 512 bytes on stack for temp_map in init path. */
	unsigned short temp_map[NR_KEYS];
	int i, j;

	for (i = 0; i < MAX_NR_KEYMAPS; i++) {
		if (!key_maps[i])
			continue;
		memset(temp_map, 0, sizeof(temp_map));
		for (j = 0; j < 0x78; j++) {
			if (!amikbd_keycode[j])
				continue;
			temp_map[j] = key_maps[i][amikbd_keycode[j]];
		}
		for (j = 0; j < NR_KEYS; j++) {
			if (!temp_map[j])
				temp_map[j] = 0xf200;
		}
		memcpy(key_maps[i], temp_map, sizeof(temp_map));
	}
}
#else /* !CONFIG_HW_CONSOLE */
static inline void amikbd_init_console_keymaps(void) {}
#endif /* !CONFIG_HW_CONSOLE */

static const char *amikbd_messages[8] = {
	[0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
	[1] = KERN_WARNING "amikbd: keyboard lost sync\n",
	[2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
	[3] = KERN_WARNING "amikbd: keyboard controller failure\n",
	[4] = KERN_ERR "amikbd: keyboard selftest failure\n",
	[5] = KERN_INFO "amikbd: initiate power-up key stream\n",
	[6] = KERN_INFO "amikbd: terminate power-up key stream\n",
	[7] = KERN_WARNING "amikbd: keyboard interrupt\n"
};

static irqreturn_t amikbd_interrupt(int irq, void *data)
{
	struct input_dev *dev = data;
	unsigned char scancode, down;

	scancode = ~ciaa.sdr;		/* get and invert scancode (keyboard is active low) */
	ciaa.cra |= 0x40;		/* switch SP pin to output for handshake */
	udelay(85);			/* wait until 85 us have expired */
	ciaa.cra &= ~0x40;		/* switch CIA serial port to input mode */

	down = !(scancode & 1);		/* lowest bit is release bit */
	scancode >>= 1;

	if (scancode < 0x78) {		/* scancodes < 0x78 are keys */
		if (scancode == 98) {	/* CapsLock is a toggle switch key on Amiga */
			input_report_key(dev, scancode, 1);
			input_report_key(dev, scancode, 0);
		} else {
			input_report_key(dev, scancode, down);
		}

		input_sync(dev);
	} else				/* scancodes >= 0x78 are error codes */
		printk(amikbd_messages[scancode - 0x78]);

	return IRQ_HANDLED;
}

static int __init amikbd_probe(struct platform_device *pdev)
{
	struct input_dev *dev;
	int i, err;

	dev = devm_input_allocate_device(&pdev->dev);
	if (!dev) {
		dev_err(&pdev->dev, "Not enough memory for input device\n");
		return -ENOMEM;
	}

	dev->name = pdev->name;
	dev->phys = "amikbd/input0";
	dev->id.bustype = BUS_AMIGA;
	dev->id.vendor = 0x0001;
	dev->id.product = 0x0001;
	dev->id.version = 0x0100;

	dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);

	for (i = 0; i < 0x78; i++)
		set_bit(i, dev->keybit);

	amikbd_init_console_keymaps();

	ciaa.cra &= ~0x41;	 /* serial data in, turn off TA */
	err = devm_request_irq(&pdev->dev, IRQ_AMIGA_CIAA_SP, amikbd_interrupt,
			       0, "amikbd", dev);
	if (err)
		return err;

	err = input_register_device(dev);
	if (err)
		return err;

	platform_set_drvdata(pdev, dev);

	return 0;
}

static struct platform_driver amikbd_driver = {
	.driver   = {
		.name	= "amiga-keyboard",
	},
};

module_platform_driver_probe(amikbd_driver, amikbd_probe);

MODULE_ALIAS("platform:amiga-keyboard");