aboutsummaryrefslogtreecommitdiff
path: root/drivers/input/joystick/iforce/iforce-packets.c
blob: 58728ebaaf80ccc33b31770af4e77a7d824a7299 (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
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/*
 * $Id: iforce-packets.c,v 1.16 2002/07/07 10:22:50 jdeneux Exp $
 *
 *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
 *  Copyright (c) 2001-2002 Johann Deneux <deneux@ifrance.com>
 *
 *  USB/RS232 I-Force joysticks and wheels.
 */

/*
 * 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 "iforce.h"

static struct {
	__s32 x;
	__s32 y;
} iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};


void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data)
{
	int i;

	printk(KERN_DEBUG "iforce.c: %s ( cmd = %04x, data = ", msg, cmd);
	for (i = 0; i < LO(cmd); i++)
		printk("%02x ", data[i]);
	printk(")\n");
}

/*
 * Send a packet of bytes to the device
 */
int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
{
	/* Copy data to buffer */
	int n = LO(cmd);
	int c;
	int empty;
	int head, tail;
	unsigned long flags;

/*
 * Update head and tail of xmit buffer
 */
	spin_lock_irqsave(&iforce->xmit_lock, flags);

	head = iforce->xmit.head;
	tail = iforce->xmit.tail;

	if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
		printk(KERN_WARNING "iforce.c: not enough space in xmit buffer to send new packet\n");
		spin_unlock_irqrestore(&iforce->xmit_lock, flags);
		return -1;
	}

	empty = head == tail;
	XMIT_INC(iforce->xmit.head, n+2);

/*
 * Store packet in xmit buffer
 */
	iforce->xmit.buf[head] = HI(cmd);
	XMIT_INC(head, 1);
	iforce->xmit.buf[head] = LO(cmd);
	XMIT_INC(head, 1);

	c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
	if (n < c) c=n;

	memcpy(&iforce->xmit.buf[head],
	       data,
	       c);
	if (n != c) {
		memcpy(&iforce->xmit.buf[0],
		       data + c,
		       n - c);
	}
	XMIT_INC(head, n);

	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
/*
 * If necessary, start the transmission
 */
	switch (iforce->bus) {

#ifdef CONFIG_JOYSTICK_IFORCE_232
		case IFORCE_232:
		if (empty)
			iforce_serial_xmit(iforce);
		break;
#endif
#ifdef CONFIG_JOYSTICK_IFORCE_USB
		case IFORCE_USB:

		if (iforce->usbdev && empty &&
			!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {

			iforce_usb_xmit(iforce);
		}
		break;
#endif
	}
	return 0;
}

/* Start or stop an effect */
int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
{
	unsigned char data[3];

printk(KERN_DEBUG "iforce-packets.c: control_playback %d %d\n", id, value);

	data[0] = LO(id);
	data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
	data[2] = LO(value);
	return iforce_send_packet(iforce, FF_CMD_PLAY, data);
}

/* Mark an effect that was being updated as ready. That means it can be updated
 * again */
static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
{
	int i;
	for (i=0; i<iforce->dev.ff_effects_max; ++i) {
		if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
		    (iforce->core_effects[i].mod1_chunk.start == addr ||
		     iforce->core_effects[i].mod2_chunk.start == addr)) {
			clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
			return 0;
		}
	}
	printk(KERN_WARNING "iforce-packets.c: unused effect %04x updated !!!\n", addr);
	return -1;
}

void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data, struct pt_regs *regs)
{
	struct input_dev *dev = &iforce->dev;
	int i;
	static int being_used = 0;

	if (being_used)
		printk(KERN_WARNING "iforce-packets.c: re-entrant call to iforce_process %d\n", being_used);
	being_used++;

#ifdef CONFIG_JOYSTICK_IFORCE_232
	if (HI(iforce->expect_packet) == HI(cmd)) {
		iforce->expect_packet = 0;
		iforce->ecmd = cmd;
		memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
		wake_up(&iforce->wait);
	}
#endif

	if (!iforce->type) {
		being_used--;
		return;
	}

	switch (HI(cmd)) {

		case 0x01:	/* joystick position data */
		case 0x03:	/* wheel position data */

			input_regs(dev, regs);

			if (HI(cmd) == 1) {
				input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
				input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
				input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
				if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
					input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
			} else {
				input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
				input_report_abs(dev, ABS_GAS,   255 - data[2]);
				input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
			}

			input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
			input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);

			for (i = 0; iforce->type->btn[i] >= 0; i++)
				input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));

			/* If there are untouched bits left, interpret them as the second hat */
			if (i <= 8) {
				int btns = data[6];
				if (test_bit(ABS_HAT1X, dev->absbit)) {
					if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
					else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
					else input_report_abs(dev, ABS_HAT1X, 0);
				}
				if (test_bit(ABS_HAT1Y, dev->absbit)) {
					if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
					else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
					else input_report_abs(dev, ABS_HAT1Y, 0);
				}
			}

			input_sync(dev);

			break;

		case 0x02:	/* status report */
			input_regs(dev, regs);
			input_report_key(dev, BTN_DEAD, data[0] & 0x02);
			input_sync(dev);

			/* Check if an effect was just started or stopped */
			i = data[1] & 0x7f;
			if (data[1] & 0x80) {
				if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
				/* Report play event */
				input_report_ff_status(dev, i, FF_STATUS_PLAYING);
				}
			}
			else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
				/* Report stop event */
				input_report_ff_status(dev, i, FF_STATUS_STOPPED);
			}
			if (LO(cmd) > 3) {
				int j;
				for (j=3; j<LO(cmd); j+=2) {
					mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
				}
			}
			break;
	}
	being_used--;
}

int iforce_get_id_packet(struct iforce *iforce, char *packet)
{
	DECLARE_WAITQUEUE(wait, current);
	int timeout = HZ; /* 1 second */

	switch (iforce->bus) {

	case IFORCE_USB:

#ifdef CONFIG_JOYSTICK_IFORCE_USB
		iforce->cr.bRequest = packet[0];
		iforce->ctrl->dev = iforce->usbdev;

		set_current_state(TASK_INTERRUPTIBLE);
		add_wait_queue(&iforce->wait, &wait);

		if (usb_submit_urb(iforce->ctrl, GFP_ATOMIC)) {
			set_current_state(TASK_RUNNING);
			remove_wait_queue(&iforce->wait, &wait);
			return -1;
		}

		while (timeout && iforce->ctrl->status == -EINPROGRESS)
			timeout = schedule_timeout(timeout);

		set_current_state(TASK_RUNNING);
		remove_wait_queue(&iforce->wait, &wait);

		if (!timeout) {
			usb_unlink_urb(iforce->ctrl);
			return -1;
		}
#else
		printk(KERN_ERR "iforce_get_id_packet: iforce->bus = USB!\n");
#endif
		break;

	case IFORCE_232:

#ifdef CONFIG_JOYSTICK_IFORCE_232
		iforce->expect_packet = FF_CMD_QUERY;
		iforce_send_packet(iforce, FF_CMD_QUERY, packet);

		set_current_state(TASK_INTERRUPTIBLE);
		add_wait_queue(&iforce->wait, &wait);

		while (timeout && iforce->expect_packet)
			timeout = schedule_timeout(timeout);

		set_current_state(TASK_RUNNING);
		remove_wait_queue(&iforce->wait, &wait);

		if (!timeout) {
			iforce->expect_packet = 0;
			return -1;
		}
#else
		printk(KERN_ERR "iforce_get_id_packet: iforce->bus = SERIO!\n");
#endif
		break;

	default:
		printk(KERN_ERR "iforce_get_id_packet: iforce->bus = %d\n",
		       iforce->bus);
		break;
	}

	return -(iforce->edata[0] != packet[0]);
}