summaryrefslogtreecommitdiffstats
path: root/drivers/input/keyboard/jornada680_kbd.c
blob: 74e75a6e8debca3a9e5c75df7ca3bccb534fb666 (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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
/*
 * drivers/input/keyboard/jornada680_kbd.c
 *
 * HP Jornada 620/660/680/690 scan keyboard platform driver
 *  Copyright (C) 2007  Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
 *
 * Based on hp680_keyb.c
 *  Copyright (C) 2006 Paul Mundt
 *  Copyright (C) 2005 Andriy Skulysh
 * Split from drivers/input/keyboard/hp600_keyb.c
 *  Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
 *  Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/input.h>
#include <linux/input-polldev.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <asm/delay.h>
#include <asm/io.h>

#define PCCR 0xa4000104
#define PDCR 0xa4000106
#define PECR 0xa4000108
#define PFCR 0xa400010a
#define PCDR 0xa4000124
#define PDDR 0xa4000126
#define PEDR 0xa4000128
#define PFDR 0xa400012a
#define PGDR 0xa400012c
#define PHDR 0xa400012e
#define PJDR 0xa4000130
#define PKDR 0xa4000132
#define PLDR 0xa4000134

static const unsigned short jornada_scancodes[] = {
/* PTD1 */	KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0,			/*  1  -> 8   */
		KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5,				/*  9  -> 16  */
/* PTD5 */	KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0,				/*  17 -> 24  */
		KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N,				/*  25 -> 32  */
/* PTD7 */	KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0,						/*  33 -> 40  */
		KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA,	/*  41 -> 48  */
/* PTE0 */	KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0,				/*  49 -> 56  */
		KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0,		/*  57 -> 64  */
/* PTE1 */	KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0,			/*  65 -> 72  */
		KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H,					/*  73 -> 80  */
/* PTE3 */	KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0,				/*  81 -> 88  */
		0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK,	/*  89 -> 96  */
/* PTE6 */	KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0,					/*  97 -> 104 */
		KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y,					/* 105 -> 112 */
/* PTE7 */	KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0,						/* 113 -> 120 */
		KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6,					/* 121 -> 128 */
/* **** */	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0
};

#define JORNADA_SCAN_SIZE	18

struct jornadakbd {
	struct input_polled_dev *poll_dev;
	unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
	unsigned char length;
	unsigned char old_scan[JORNADA_SCAN_SIZE];
	unsigned char new_scan[JORNADA_SCAN_SIZE];
};

static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
{
	struct input_dev *input_dev = jornadakbd->poll_dev->input;
	unsigned short *keymap = jornadakbd->keymap;
	unsigned int sync_me = 0;
	unsigned int i, j;

	for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
		unsigned char new = jornadakbd->new_scan[i];
		unsigned char old = jornadakbd->old_scan[i];
		unsigned int xor = new ^ old;

		if (xor == 0)
			continue;

		for (j = 0; j < 8; j++) {
			unsigned int bit = 1 << j;
			if (xor & bit) {
				unsigned int scancode = (i << 3) + j;
				input_event(input_dev,
					    EV_MSC, MSC_SCAN, scancode);
				input_report_key(input_dev,
						 keymap[scancode],
						 !(new & bit));
				sync_me = 1;
			}
		}
	}

	if (sync_me)
	    input_sync(input_dev);
}

static void jornada_scan_keyb(unsigned char *s)
{
	int i;
	unsigned short ec_static, dc_static; /* = UINT16_t */
	unsigned char matrix_switch[] = {
		0xfd, 0xff,   /* PTD1 PD(1) */
		0xdf, 0xff,   /* PTD5 PD(5) */
		0x7f, 0xff,   /* PTD7 PD(7) */
		0xff, 0xfe,   /* PTE0 PE(0) */
		0xff, 0xfd,   /* PTE1 PE(1) */
		0xff, 0xf7,   /* PTE3 PE(3) */
		0xff, 0xbf,   /* PTE6 PE(6) */
		0xff, 0x7f,   /* PTE7 PE(7) */
	}, *t = matrix_switch;
	/* PD(x) :
	1.   0xcc0c & (1~(1 << (2*(x)+1)))))
	2.   (0xf0cf & 0xfffff) */
	/* PE(x) :
	1.   0xcc0c & 0xffff
	2.   0xf0cf & (1~(1 << (2*(x)+1))))) */
	unsigned short matrix_PDE[] = {
		0xcc04, 0xf0cf,  /* PD(1) */
		0xc40c, 0xf0cf,	 /* PD(5) */
		0x4c0c, 0xf0cf,  /* PD(7) */
		0xcc0c, 0xf0cd,  /* PE(0) */
		0xcc0c, 0xf0c7,	 /* PE(1) */
		0xcc0c, 0xf04f,  /* PE(3) */
		0xcc0c, 0xd0cf,	 /* PE(6) */
		0xcc0c, 0x70cf,	 /* PE(7) */
	}, *y = matrix_PDE;

	/* Save these control reg bits */
	dc_static = (__raw_readw(PDCR) & (~0xcc0c));
	ec_static = (__raw_readw(PECR) & (~0xf0cf));

	for (i = 0; i < 8; i++) {
		/* disable output for all but the one we want to scan */
		__raw_writew((dc_static | *y++), PDCR);
		__raw_writew((ec_static | *y++), PECR);
		udelay(5);

		/* Get scanline row */
		__raw_writeb(*t++, PDDR);
		__raw_writeb(*t++, PEDR);
		udelay(50);

		/* Read data */
		*s++ = __raw_readb(PCDR);
		*s++ = __raw_readb(PFDR);
	}
	/* Scan no lines */
	__raw_writeb(0xff, PDDR);
	__raw_writeb(0xff, PEDR);

	/* Enable all scanlines */
	__raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
	__raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);

	/* Ignore extra keys and events */
	*s++ = __raw_readb(PGDR);
	*s++ = __raw_readb(PHDR);
}

static void jornadakbd680_poll(struct input_polled_dev *dev)
{
	struct jornadakbd *jornadakbd = dev->private;

	jornada_scan_keyb(jornadakbd->new_scan);
	jornada_parse_kbd(jornadakbd);
	memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
}

static int jornada680kbd_probe(struct platform_device *pdev)
{
	struct jornadakbd *jornadakbd;
	struct input_polled_dev *poll_dev;
	struct input_dev *input_dev;
	int i, error;

	jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
	if (!jornadakbd)
		return -ENOMEM;

	poll_dev = input_allocate_polled_device();
	if (!poll_dev) {
		error = -ENOMEM;
		goto failed;
	}

	platform_set_drvdata(pdev, jornadakbd);

	jornadakbd->poll_dev = poll_dev;

	memcpy(jornadakbd->keymap, jornada_scancodes,
		sizeof(jornadakbd->keymap));

	poll_dev->private = jornadakbd;
	poll_dev->poll = jornadakbd680_poll;
	poll_dev->poll_interval = 50; /* msec */

	input_dev = poll_dev->input;
	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
	input_dev->name = "HP Jornada 680 keyboard";
	input_dev->phys = "jornadakbd/input0";
	input_dev->keycode = jornadakbd->keymap;
	input_dev->keycodesize = sizeof(unsigned short);
	input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
	input_dev->dev.parent = &pdev->dev;
	input_dev->id.bustype = BUS_HOST;

	for (i = 0; i < 128; i++)
		if (jornadakbd->keymap[i])
			__set_bit(jornadakbd->keymap[i], input_dev->keybit);
	__clear_bit(KEY_RESERVED, input_dev->keybit);

	input_set_capability(input_dev, EV_MSC, MSC_SCAN);

	error = input_register_polled_device(jornadakbd->poll_dev);
	if (error)
		goto failed;

	return 0;

 failed:
	printk(KERN_ERR "Jornadakbd: failed to register driver, error: %d\n",
		error);
	platform_set_drvdata(pdev, NULL);
	input_free_polled_device(poll_dev);
	kfree(jornadakbd);
	return error;

}

static int jornada680kbd_remove(struct platform_device *pdev)
{
	struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	input_unregister_polled_device(jornadakbd->poll_dev);
	input_free_polled_device(jornadakbd->poll_dev);
	kfree(jornadakbd);

	return 0;
}

static struct platform_driver jornada680kbd_driver = {
	.driver	= {
		.name	= "jornada680_kbd",
		.owner	= THIS_MODULE,
	},
	.probe	= jornada680kbd_probe,
	.remove	= jornada680kbd_remove,
};
module_platform_driver(jornada680kbd_driver);

MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:jornada680_kbd");