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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [input/] [joystick/] [grip.c] - Blame information for rev 62

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1 62 marcus.erl
/*
2
 * $Id: grip.c,v 1.21 2002/01/22 20:27:57 vojtech Exp $
3
 *
4
 *  Copyright (c) 1998-2001 Vojtech Pavlik
5
 */
6
 
7
/*
8
 * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
9
 */
10
 
11
/*
12
 * This program is free software; you can redistribute it and/or modify
13
 * it under the terms of the GNU General Public License as published by
14
 * the Free Software Foundation; either version 2 of the License, or
15
 * (at your option) any later version.
16
 *
17
 * This program is distributed in the hope that it will be useful,
18
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20
 * GNU General Public License for more details.
21
 *
22
 * You should have received a copy of the GNU General Public License
23
 * along with this program; if not, write to the Free Software
24
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25
 *
26
 * Should you need to contact me, the author, you can do so either by
27
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
28
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29
 */
30
 
31
#include <linux/kernel.h>
32
#include <linux/module.h>
33
#include <linux/init.h>
34
#include <linux/slab.h>
35
#include <linux/gameport.h>
36
#include <linux/input.h>
37
#include <linux/jiffies.h>
38
 
39
#define DRIVER_DESC     "Gravis GrIP protocol joystick driver"
40
 
41
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42
MODULE_DESCRIPTION(DRIVER_DESC);
43
MODULE_LICENSE("GPL");
44
 
45
#define GRIP_MODE_GPP           1
46
#define GRIP_MODE_BD            2
47
#define GRIP_MODE_XT            3
48
#define GRIP_MODE_DC            4
49
 
50
#define GRIP_LENGTH_GPP         24
51
#define GRIP_STROBE_GPP         200     /* 200 us */
52
#define GRIP_LENGTH_XT          4
53
#define GRIP_STROBE_XT          64      /* 64 us */
54
#define GRIP_MAX_CHUNKS_XT      10
55
#define GRIP_MAX_BITS_XT        30
56
 
57
struct grip {
58
        struct gameport *gameport;
59
        struct input_dev *dev[2];
60
        unsigned char mode[2];
61
        int reads;
62
        int bads;
63
        char phys[2][32];
64
};
65
 
66
static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 };
67
static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
68
static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 };
69
static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
70
 
71
static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
72
static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
73
static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
74
static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
75
 
76
static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
77
                                "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
78
static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
79
static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
80
static char grip_anx[] = { 0, 0, 3, 5, 5 };
81
static char grip_cen[] = { 0, 0, 2, 2, 4 };
82
 
83
/*
84
 * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
85
 */
86
 
87
static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
88
{
89
        unsigned long flags;
90
        unsigned char u, v;
91
        unsigned int t;
92
        int i;
93
 
94
        int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
95
 
96
        data[0] = 0;
97
        t = strobe;
98
        i = 0;
99
 
100
        local_irq_save(flags);
101
 
102
        v = gameport_read(gameport) >> shift;
103
 
104
        do {
105
                t--;
106
                u = v; v = (gameport_read(gameport) >> shift) & 3;
107
                if (~v & u & 1) {
108
                        data[0] |= (v >> 1) << i++;
109
                        t = strobe;
110
                }
111
        } while (i < GRIP_LENGTH_GPP && t > 0);
112
 
113
        local_irq_restore(flags);
114
 
115
        if (i < GRIP_LENGTH_GPP) return -1;
116
 
117
        for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
118
                data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
119
 
120
        return -(i == GRIP_LENGTH_GPP);
121
}
122
 
123
/*
124
 * grip_xt_read_packet() reads a Gravis Xterminator packet.
125
 */
126
 
127
static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
128
{
129
        unsigned int i, j, buf, crc;
130
        unsigned char u, v, w;
131
        unsigned long flags;
132
        unsigned int t;
133
        char status;
134
 
135
        int strobe = gameport_time(gameport, GRIP_STROBE_XT);
136
 
137
        data[0] = data[1] = data[2] = data[3] = 0;
138
        status = buf = i = j = 0;
139
        t = strobe;
140
 
141
        local_irq_save(flags);
142
 
143
        v = w = (gameport_read(gameport) >> shift) & 3;
144
 
145
        do {
146
                t--;
147
                u = (gameport_read(gameport) >> shift) & 3;
148
 
149
                if (u ^ v) {
150
 
151
                        if ((u ^ v) & 1) {
152
                                buf = (buf << 1) | (u >> 1);
153
                                t = strobe;
154
                                i++;
155
                        } else
156
 
157
                        if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
158
                                if (i == 20) {
159
                                        crc = buf ^ (buf >> 7) ^ (buf >> 14);
160
                                        if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
161
                                                data[buf >> 18] = buf >> 4;
162
                                                status |= 1 << (buf >> 18);
163
                                        }
164
                                        j++;
165
                                }
166
                                t = strobe;
167
                                buf = 0;
168
                                i = 0;
169
                        }
170
                        w = v;
171
                        v = u;
172
                }
173
 
174
        } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
175
 
176
        local_irq_restore(flags);
177
 
178
        return -(status != 0xf);
179
}
180
 
181
/*
182
 * grip_timer() repeatedly polls the joysticks and generates events.
183
 */
184
 
185
static void grip_poll(struct gameport *gameport)
186
{
187
        struct grip *grip = gameport_get_drvdata(gameport);
188
        unsigned int data[GRIP_LENGTH_XT];
189
        struct input_dev *dev;
190
        int i, j;
191
 
192
        for (i = 0; i < 2; i++) {
193
 
194
                dev = grip->dev[i];
195
                if (!dev)
196
                        continue;
197
 
198
                grip->reads++;
199
 
200
                switch (grip->mode[i]) {
201
 
202
                        case GRIP_MODE_GPP:
203
 
204
                                if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
205
                                        grip->bads++;
206
                                        break;
207
                                }
208
 
209
                                input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
210
                                input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
211
 
212
                                for (j = 0; j < 12; j++)
213
                                        if (grip_btn_gpp[j])
214
                                                input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
215
 
216
                                break;
217
 
218
                        case GRIP_MODE_BD:
219
 
220
                                if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
221
                                        grip->bads++;
222
                                        break;
223
                                }
224
 
225
                                input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
226
                                input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
227
                                input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
228
 
229
                                input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
230
                                input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
231
 
232
                                for (j = 0; j < 5; j++)
233
                                        input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
234
 
235
                                break;
236
 
237
                        case GRIP_MODE_XT:
238
 
239
                                if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
240
                                        grip->bads++;
241
                                        break;
242
                                }
243
 
244
                                input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
245
                                input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
246
                                input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
247
                                input_report_abs(dev, ABS_GAS,      (data[1] >> 8) & 0x3f);
248
                                input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
249
 
250
                                input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
251
                                input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
252
                                input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
253
                                input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
254
 
255
                                for (j = 0; j < 11; j++)
256
                                        input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
257
                                break;
258
 
259
                        case GRIP_MODE_DC:
260
 
261
                                if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
262
                                        grip->bads++;
263
                                        break;
264
                                }
265
 
266
                                input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
267
                                input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
268
                                input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
269
                                input_report_abs(dev, ABS_RY,       (data[1] >> 8) & 0x3f);
270
                                input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
271
 
272
                                input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
273
                                input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
274
 
275
                                for (j = 0; j < 9; j++)
276
                                        input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
277
                                break;
278
 
279
 
280
                }
281
 
282
                input_sync(dev);
283
        }
284
}
285
 
286
static int grip_open(struct input_dev *dev)
287
{
288
        struct grip *grip = input_get_drvdata(dev);
289
 
290
        gameport_start_polling(grip->gameport);
291
        return 0;
292
}
293
 
294
static void grip_close(struct input_dev *dev)
295
{
296
        struct grip *grip = input_get_drvdata(dev);
297
 
298
        gameport_stop_polling(grip->gameport);
299
}
300
 
301
static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
302
{
303
        struct grip *grip;
304
        struct input_dev *input_dev;
305
        unsigned int data[GRIP_LENGTH_XT];
306
        int i, j, t;
307
        int err;
308
 
309
        if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
310
                return -ENOMEM;
311
 
312
        grip->gameport = gameport;
313
 
314
        gameport_set_drvdata(gameport, grip);
315
 
316
        err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
317
        if (err)
318
                goto fail1;
319
 
320
        for (i = 0; i < 2; i++) {
321
                if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
322
                        grip->mode[i] = GRIP_MODE_GPP;
323
                        continue;
324
                }
325
                if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
326
                        if (!(data[3] & 7)) {
327
                                grip->mode[i] = GRIP_MODE_BD;
328
                                continue;
329
                        }
330
                        if (!(data[2] & 0xf0)) {
331
                                grip->mode[i] = GRIP_MODE_XT;
332
                                continue;
333
                        }
334
                        grip->mode[i] = GRIP_MODE_DC;
335
                        continue;
336
                }
337
        }
338
 
339
        if (!grip->mode[0] && !grip->mode[1]) {
340
                err = -ENODEV;
341
                goto fail2;
342
        }
343
 
344
        gameport_set_poll_handler(gameport, grip_poll);
345
        gameport_set_poll_interval(gameport, 20);
346
 
347
        for (i = 0; i < 2; i++) {
348
                if (!grip->mode[i])
349
                        continue;
350
 
351
                grip->dev[i] = input_dev = input_allocate_device();
352
                if (!input_dev) {
353
                        err = -ENOMEM;
354
                        goto fail3;
355
                }
356
 
357
                snprintf(grip->phys[i], sizeof(grip->phys[i]),
358
                         "%s/input%d", gameport->phys, i);
359
 
360
                input_dev->name = grip_name[grip->mode[i]];
361
                input_dev->phys = grip->phys[i];
362
                input_dev->id.bustype = BUS_GAMEPORT;
363
                input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
364
                input_dev->id.product = grip->mode[i];
365
                input_dev->id.version = 0x0100;
366
                input_dev->dev.parent = &gameport->dev;
367
 
368
                input_set_drvdata(input_dev, grip);
369
 
370
                input_dev->open = grip_open;
371
                input_dev->close = grip_close;
372
 
373
                input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
374
 
375
                for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
376
 
377
                        if (j < grip_cen[grip->mode[i]])
378
                                input_set_abs_params(input_dev, t, 14, 52, 1, 2);
379
                        else if (j < grip_anx[grip->mode[i]])
380
                                input_set_abs_params(input_dev, t, 3, 57, 1, 0);
381
                        else
382
                                input_set_abs_params(input_dev, t, -1, 1, 0, 0);
383
                }
384
 
385
                for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
386
                        if (t > 0)
387
                                set_bit(t, input_dev->keybit);
388
 
389
                err = input_register_device(grip->dev[i]);
390
                if (err)
391
                        goto fail4;
392
        }
393
 
394
        return 0;
395
 
396
 fail4: input_free_device(grip->dev[i]);
397
 fail3: while (--i >= 0)
398
                if (grip->dev[i])
399
                        input_unregister_device(grip->dev[i]);
400
 fail2: gameport_close(gameport);
401
 fail1: gameport_set_drvdata(gameport, NULL);
402
        kfree(grip);
403
        return err;
404
}
405
 
406
static void grip_disconnect(struct gameport *gameport)
407
{
408
        struct grip *grip = gameport_get_drvdata(gameport);
409
        int i;
410
 
411
        for (i = 0; i < 2; i++)
412
                if (grip->dev[i])
413
                        input_unregister_device(grip->dev[i]);
414
        gameport_close(gameport);
415
        gameport_set_drvdata(gameport, NULL);
416
        kfree(grip);
417
}
418
 
419
static struct gameport_driver grip_drv = {
420
        .driver         = {
421
                .name   = "grip",
422
                .owner  = THIS_MODULE,
423
        },
424
        .description    = DRIVER_DESC,
425
        .connect        = grip_connect,
426
        .disconnect     = grip_disconnect,
427
};
428
 
429
static int __init grip_init(void)
430
{
431
        gameport_register_driver(&grip_drv);
432
        return 0;
433
}
434
 
435
static void __exit grip_exit(void)
436
{
437
        gameport_unregister_driver(&grip_drv);
438
}
439
 
440
module_init(grip_init);
441
module_exit(grip_exit);

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