summaryrefslogtreecommitdiffstats
path: root/drivers/input/joystick/guillemot.c
blob: 840ed9b512b26b5695e530545ba585741b1e9555 (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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
/*
 * $Id: guillemot.c,v 1.10 2002/01/22 20:28:12 vojtech Exp $
 *
 *  Copyright (c) 2001 Vojtech Pavlik
 */

/*
 * Guillemot Digital Interface Protocol driver for Linux
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/gameport.h>
#include <linux/input.h>
#include <linux/jiffies.h>

#define DRIVER_DESC	"Guillemot Digital joystick driver"

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

#define GUILLEMOT_MAX_START	600	/* 600 us */
#define GUILLEMOT_MAX_STROBE	60	/* 60 us */
#define GUILLEMOT_MAX_LENGTH	17	/* 17 bytes */

static short guillemot_abs_pad[] =
	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };

static short guillemot_btn_pad[] =
	{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };

static struct {
        int x;
        int y;
} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

struct guillemot_type {
	unsigned char id;
	short *abs;
	short *btn;
	int hat;
	char *name;
};

struct guillemot {
	struct gameport *gameport;
	struct input_dev *dev;
	int bads;
	int reads;
	struct guillemot_type *type;
	unsigned char length;
	char phys[32];
};

static struct guillemot_type guillemot_type[] = {
	{ 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
	{ 0 }};

/*
 * guillemot_read_packet() reads Guillemot joystick data.
 */

static int guillemot_read_packet(struct gameport *gameport, u8 *data)
{
	unsigned long flags;
	unsigned char u, v;
	unsigned int t, s;
	int i;

	for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
		data[i] = 0;

	i = 0;
	t = gameport_time(gameport, GUILLEMOT_MAX_START);
	s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);

	local_irq_save(flags);
	gameport_trigger(gameport);
	v = gameport_read(gameport);

	while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
		t--;
		u = v; v = gameport_read(gameport);
		if (v & ~u & 0x10) {
			data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
			i++;
			t = s;
		}
	}

	local_irq_restore(flags);

	return i;
}

/*
 * guillemot_poll() reads and analyzes Guillemot joystick data.
 */

static void guillemot_poll(struct gameport *gameport)
{
	struct guillemot *guillemot = gameport_get_drvdata(gameport);
	struct input_dev *dev = guillemot->dev;
	u8 data[GUILLEMOT_MAX_LENGTH];
	int i;

	guillemot->reads++;

	if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
		data[0] != 0x55 || data[16] != 0xaa) {
		guillemot->bads++;
	} else {

		for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
			input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);

		if (guillemot->type->hat) {
			input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
			input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
		}

		for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
			input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
	}

	input_sync(dev);
}

/*
 * guillemot_open() is a callback from the input open routine.
 */

static int guillemot_open(struct input_dev *dev)
{
	struct guillemot *guillemot = dev->private;

	gameport_start_polling(guillemot->gameport);
	return 0;
}

/*
 * guillemot_close() is a callback from the input close routine.
 */

static void guillemot_close(struct input_dev *dev)
{
	struct guillemot *guillemot = dev->private;

	gameport_stop_polling(guillemot->gameport);
}

/*
 * guillemot_connect() probes for Guillemot joysticks.
 */

static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
{
	struct guillemot *guillemot;
	struct input_dev *input_dev;
	u8 data[GUILLEMOT_MAX_LENGTH];
	int i, t;
	int err;

	guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!guillemot || !input_dev) {
		err = -ENOMEM;
		goto fail1;
	}

	guillemot->gameport = gameport;
	guillemot->dev = input_dev;

	gameport_set_drvdata(gameport, guillemot);

	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	if (err)
		goto fail1;

	i = guillemot_read_packet(gameport, data);

	if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
		err = -ENODEV;
		goto fail2;
	}

	for (i = 0; guillemot_type[i].name; i++)
		if (guillemot_type[i].id == data[11])
			break;

	if (!guillemot_type[i].name) {
		printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
			gameport->phys, data[12], data[13], data[11], data[14], data[15]);
		err = -ENODEV;
		goto fail2;
	}

	gameport_set_poll_handler(gameport, guillemot_poll);
	gameport_set_poll_interval(gameport, 20);

	snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
	guillemot->type = guillemot_type + i;

	input_dev->name = guillemot_type[i].name;
	input_dev->phys = guillemot->phys;
	input_dev->id.bustype = BUS_GAMEPORT;
	input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
	input_dev->id.product = guillemot_type[i].id;
	input_dev->id.version = (int)data[14] << 8 | data[15];
	input_dev->cdev.dev = &gameport->dev;
	input_dev->private = guillemot;

	input_dev->open = guillemot_open;
	input_dev->close = guillemot_close;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

	for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
		input_set_abs_params(input_dev, t, 0, 255, 0, 0);

	if (guillemot->type->hat) {
		input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
		input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
	}

	for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
		set_bit(t, input_dev->keybit);

	input_register_device(guillemot->dev);

	return 0;

fail2:	gameport_close(gameport);
fail1:  gameport_set_drvdata(gameport, NULL);
	input_free_device(input_dev);
	kfree(guillemot);
	return err;
}

static void guillemot_disconnect(struct gameport *gameport)
{
	struct guillemot *guillemot = gameport_get_drvdata(gameport);

	printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
	input_unregister_device(guillemot->dev);
	gameport_close(gameport);
	kfree(guillemot);
}

static struct gameport_driver guillemot_drv = {
	.driver		= {
		.name	= "guillemot",
	},
	.description	= DRIVER_DESC,
	.connect	= guillemot_connect,
	.disconnect	= guillemot_disconnect,
};

static int __init guillemot_init(void)
{
	gameport_register_driver(&guillemot_drv);
	return 0;
}

static void __exit guillemot_exit(void)
{
	gameport_unregister_driver(&guillemot_drv);
}

module_init(guillemot_init);
module_exit(guillemot_exit);
OpenPOWER on IntegriCloud