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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 1998-2001 Vojtech Pavlik
4 */
5
6/*
7 * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/gameport.h>
14#include <linux/input.h>
15#include <linux/jiffies.h>
16
17#define DRIVER_DESC "Gravis GrIP protocol joystick driver"
18
19MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
20MODULE_DESCRIPTION(DRIVER_DESC);
21MODULE_LICENSE("GPL");
22
23#define GRIP_MODE_GPP 1
24#define GRIP_MODE_BD 2
25#define GRIP_MODE_XT 3
26#define GRIP_MODE_DC 4
27
28#define GRIP_LENGTH_GPP 24
29#define GRIP_STROBE_GPP 200 /* 200 us */
30#define GRIP_LENGTH_XT 4
31#define GRIP_STROBE_XT 64 /* 64 us */
32#define GRIP_MAX_CHUNKS_XT 10
33#define GRIP_MAX_BITS_XT 30
34
35struct grip {
36 struct gameport *gameport;
37 struct input_dev *dev[2];
38 unsigned char mode[2];
39 int reads;
40 int bads;
41 char phys[2][32];
42};
43
44static 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 };
45static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
46static 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 };
47static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
48
49static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
50static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
51static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
52static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
53
54static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
55 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
56static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
57static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
58static char grip_anx[] = { 0, 0, 3, 5, 5 };
59static char grip_cen[] = { 0, 0, 2, 2, 4 };
60
61/*
62 * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
63 */
64
65static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
66{
67 unsigned long flags;
68 unsigned char u, v;
69 unsigned int t;
70 int i;
71
72 int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
73
74 data[0] = 0;
75 t = strobe;
76 i = 0;
77
78 local_irq_save(flags);
79
80 v = gameport_read(gameport) >> shift;
81
82 do {
83 t--;
84 u = v; v = (gameport_read(gameport) >> shift) & 3;
85 if (~v & u & 1) {
86 data[0] |= (v >> 1) << i++;
87 t = strobe;
88 }
89 } while (i < GRIP_LENGTH_GPP && t > 0);
90
91 local_irq_restore(flags);
92
93 if (i < GRIP_LENGTH_GPP) return -1;
94
95 for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
96 data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
97
98 return -(i == GRIP_LENGTH_GPP);
99}
100
101/*
102 * grip_xt_read_packet() reads a Gravis Xterminator packet.
103 */
104
105static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
106{
107 unsigned int i, j, buf, crc;
108 unsigned char u, v, w;
109 unsigned long flags;
110 unsigned int t;
111 char status;
112
113 int strobe = gameport_time(gameport, GRIP_STROBE_XT);
114
115 data[0] = data[1] = data[2] = data[3] = 0;
116 status = buf = i = j = 0;
117 t = strobe;
118
119 local_irq_save(flags);
120
121 v = w = (gameport_read(gameport) >> shift) & 3;
122
123 do {
124 t--;
125 u = (gameport_read(gameport) >> shift) & 3;
126
127 if (u ^ v) {
128
129 if ((u ^ v) & 1) {
130 buf = (buf << 1) | (u >> 1);
131 t = strobe;
132 i++;
133 } else
134
135 if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
136 if (i == 20) {
137 crc = buf ^ (buf >> 7) ^ (buf >> 14);
138 if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
139 data[buf >> 18] = buf >> 4;
140 status |= 1 << (buf >> 18);
141 }
142 j++;
143 }
144 t = strobe;
145 buf = 0;
146 i = 0;
147 }
148 w = v;
149 v = u;
150 }
151
152 } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
153
154 local_irq_restore(flags);
155
156 return -(status != 0xf);
157}
158
159/*
160 * grip_timer() repeatedly polls the joysticks and generates events.
161 */
162
163static void grip_poll(struct gameport *gameport)
164{
165 struct grip *grip = gameport_get_drvdata(gameport);
166 unsigned int data[GRIP_LENGTH_XT];
167 struct input_dev *dev;
168 int i, j;
169
170 for (i = 0; i < 2; i++) {
171
172 dev = grip->dev[i];
173 if (!dev)
174 continue;
175
176 grip->reads++;
177
178 switch (grip->mode[i]) {
179
180 case GRIP_MODE_GPP:
181
182 if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
183 grip->bads++;
184 break;
185 }
186
187 input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
188 input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
189
190 for (j = 0; j < 12; j++)
191 if (grip_btn_gpp[j])
192 input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
193
194 break;
195
196 case GRIP_MODE_BD:
197
198 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
199 grip->bads++;
200 break;
201 }
202
203 input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
204 input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
205 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
206
207 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
208 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
209
210 for (j = 0; j < 5; j++)
211 input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
212
213 break;
214
215 case GRIP_MODE_XT:
216
217 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
218 grip->bads++;
219 break;
220 }
221
222 input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
223 input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
224 input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f);
225 input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f);
226 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
227
228 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
229 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
230 input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
231 input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
232
233 for (j = 0; j < 11; j++)
234 input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
235 break;
236
237 case GRIP_MODE_DC:
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, (data[0] >> 8) & 0x3f);
246 input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f);
247 input_report_abs(dev, ABS_RY, (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
253 for (j = 0; j < 9; j++)
254 input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
255 break;
256
257
258 }
259
260 input_sync(dev);
261 }
262}
263
264static int grip_open(struct input_dev *dev)
265{
266 struct grip *grip = input_get_drvdata(dev);
267
268 gameport_start_polling(grip->gameport);
269 return 0;
270}
271
272static void grip_close(struct input_dev *dev)
273{
274 struct grip *grip = input_get_drvdata(dev);
275
276 gameport_stop_polling(grip->gameport);
277}
278
279static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
280{
281 struct grip *grip;
282 struct input_dev *input_dev;
283 unsigned int data[GRIP_LENGTH_XT];
284 int i, j, t;
285 int err;
286
287 if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
288 return -ENOMEM;
289
290 grip->gameport = gameport;
291
292 gameport_set_drvdata(gameport, grip);
293
294 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
295 if (err)
296 goto fail1;
297
298 for (i = 0; i < 2; i++) {
299 if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
300 grip->mode[i] = GRIP_MODE_GPP;
301 continue;
302 }
303 if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
304 if (!(data[3] & 7)) {
305 grip->mode[i] = GRIP_MODE_BD;
306 continue;
307 }
308 if (!(data[2] & 0xf0)) {
309 grip->mode[i] = GRIP_MODE_XT;
310 continue;
311 }
312 grip->mode[i] = GRIP_MODE_DC;
313 continue;
314 }
315 }
316
317 if (!grip->mode[0] && !grip->mode[1]) {
318 err = -ENODEV;
319 goto fail2;
320 }
321
322 gameport_set_poll_handler(gameport, grip_poll);
323 gameport_set_poll_interval(gameport, 20);
324
325 for (i = 0; i < 2; i++) {
326 if (!grip->mode[i])
327 continue;
328
329 grip->dev[i] = input_dev = input_allocate_device();
330 if (!input_dev) {
331 err = -ENOMEM;
332 goto fail3;
333 }
334
335 snprintf(grip->phys[i], sizeof(grip->phys[i]),
336 "%s/input%d", gameport->phys, i);
337
338 input_dev->name = grip_name[grip->mode[i]];
339 input_dev->phys = grip->phys[i];
340 input_dev->id.bustype = BUS_GAMEPORT;
341 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
342 input_dev->id.product = grip->mode[i];
343 input_dev->id.version = 0x0100;
344 input_dev->dev.parent = &gameport->dev;
345
346 input_set_drvdata(input_dev, grip);
347
348 input_dev->open = grip_open;
349 input_dev->close = grip_close;
350
351 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
352
353 for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
354
355 if (j < grip_cen[grip->mode[i]])
356 input_set_abs_params(input_dev, t, 14, 52, 1, 2);
357 else if (j < grip_anx[grip->mode[i]])
358 input_set_abs_params(input_dev, t, 3, 57, 1, 0);
359 else
360 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
361 }
362
363 for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
364 if (t > 0)
365 set_bit(t, input_dev->keybit);
366
367 err = input_register_device(grip->dev[i]);
368 if (err)
369 goto fail4;
370 }
371
372 return 0;
373
374 fail4: input_free_device(grip->dev[i]);
375 fail3: while (--i >= 0)
376 if (grip->dev[i])
377 input_unregister_device(grip->dev[i]);
378 fail2: gameport_close(gameport);
379 fail1: gameport_set_drvdata(gameport, NULL);
380 kfree(grip);
381 return err;
382}
383
384static void grip_disconnect(struct gameport *gameport)
385{
386 struct grip *grip = gameport_get_drvdata(gameport);
387 int i;
388
389 for (i = 0; i < 2; i++)
390 if (grip->dev[i])
391 input_unregister_device(grip->dev[i]);
392 gameport_close(gameport);
393 gameport_set_drvdata(gameport, NULL);
394 kfree(grip);
395}
396
397static struct gameport_driver grip_drv = {
398 .driver = {
399 .name = "grip",
400 .owner = THIS_MODULE,
401 },
402 .description = DRIVER_DESC,
403 .connect = grip_connect,
404 .disconnect = grip_disconnect,
405};
406
407module_gameport_driver(grip_drv);
1/*
2 * Copyright (c) 1998-2001 Vojtech Pavlik
3 */
4
5/*
6 * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
7 */
8
9/*
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 * Should you need to contact me, the author, you can do so either by
25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
27 */
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/slab.h>
32#include <linux/gameport.h>
33#include <linux/input.h>
34#include <linux/jiffies.h>
35
36#define DRIVER_DESC "Gravis GrIP protocol joystick driver"
37
38MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
39MODULE_DESCRIPTION(DRIVER_DESC);
40MODULE_LICENSE("GPL");
41
42#define GRIP_MODE_GPP 1
43#define GRIP_MODE_BD 2
44#define GRIP_MODE_XT 3
45#define GRIP_MODE_DC 4
46
47#define GRIP_LENGTH_GPP 24
48#define GRIP_STROBE_GPP 200 /* 200 us */
49#define GRIP_LENGTH_XT 4
50#define GRIP_STROBE_XT 64 /* 64 us */
51#define GRIP_MAX_CHUNKS_XT 10
52#define GRIP_MAX_BITS_XT 30
53
54struct grip {
55 struct gameport *gameport;
56 struct input_dev *dev[2];
57 unsigned char mode[2];
58 int reads;
59 int bads;
60 char phys[2][32];
61};
62
63static 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 };
64static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
65static 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 };
66static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
67
68static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
69static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
70static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
71static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
72
73static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
74 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
75static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
76static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
77static char grip_anx[] = { 0, 0, 3, 5, 5 };
78static char grip_cen[] = { 0, 0, 2, 2, 4 };
79
80/*
81 * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
82 */
83
84static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
85{
86 unsigned long flags;
87 unsigned char u, v;
88 unsigned int t;
89 int i;
90
91 int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
92
93 data[0] = 0;
94 t = strobe;
95 i = 0;
96
97 local_irq_save(flags);
98
99 v = gameport_read(gameport) >> shift;
100
101 do {
102 t--;
103 u = v; v = (gameport_read(gameport) >> shift) & 3;
104 if (~v & u & 1) {
105 data[0] |= (v >> 1) << i++;
106 t = strobe;
107 }
108 } while (i < GRIP_LENGTH_GPP && t > 0);
109
110 local_irq_restore(flags);
111
112 if (i < GRIP_LENGTH_GPP) return -1;
113
114 for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
115 data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
116
117 return -(i == GRIP_LENGTH_GPP);
118}
119
120/*
121 * grip_xt_read_packet() reads a Gravis Xterminator packet.
122 */
123
124static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
125{
126 unsigned int i, j, buf, crc;
127 unsigned char u, v, w;
128 unsigned long flags;
129 unsigned int t;
130 char status;
131
132 int strobe = gameport_time(gameport, GRIP_STROBE_XT);
133
134 data[0] = data[1] = data[2] = data[3] = 0;
135 status = buf = i = j = 0;
136 t = strobe;
137
138 local_irq_save(flags);
139
140 v = w = (gameport_read(gameport) >> shift) & 3;
141
142 do {
143 t--;
144 u = (gameport_read(gameport) >> shift) & 3;
145
146 if (u ^ v) {
147
148 if ((u ^ v) & 1) {
149 buf = (buf << 1) | (u >> 1);
150 t = strobe;
151 i++;
152 } else
153
154 if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
155 if (i == 20) {
156 crc = buf ^ (buf >> 7) ^ (buf >> 14);
157 if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
158 data[buf >> 18] = buf >> 4;
159 status |= 1 << (buf >> 18);
160 }
161 j++;
162 }
163 t = strobe;
164 buf = 0;
165 i = 0;
166 }
167 w = v;
168 v = u;
169 }
170
171 } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
172
173 local_irq_restore(flags);
174
175 return -(status != 0xf);
176}
177
178/*
179 * grip_timer() repeatedly polls the joysticks and generates events.
180 */
181
182static void grip_poll(struct gameport *gameport)
183{
184 struct grip *grip = gameport_get_drvdata(gameport);
185 unsigned int data[GRIP_LENGTH_XT];
186 struct input_dev *dev;
187 int i, j;
188
189 for (i = 0; i < 2; i++) {
190
191 dev = grip->dev[i];
192 if (!dev)
193 continue;
194
195 grip->reads++;
196
197 switch (grip->mode[i]) {
198
199 case GRIP_MODE_GPP:
200
201 if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
202 grip->bads++;
203 break;
204 }
205
206 input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
207 input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
208
209 for (j = 0; j < 12; j++)
210 if (grip_btn_gpp[j])
211 input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
212
213 break;
214
215 case GRIP_MODE_BD:
216
217 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
218 grip->bads++;
219 break;
220 }
221
222 input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
223 input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
224 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
225
226 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
227 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
228
229 for (j = 0; j < 5; j++)
230 input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
231
232 break;
233
234 case GRIP_MODE_XT:
235
236 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
237 grip->bads++;
238 break;
239 }
240
241 input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
242 input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
243 input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f);
244 input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f);
245 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
246
247 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
248 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
249 input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
250 input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
251
252 for (j = 0; j < 11; j++)
253 input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
254 break;
255
256 case GRIP_MODE_DC:
257
258 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
259 grip->bads++;
260 break;
261 }
262
263 input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
264 input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f);
265 input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f);
266 input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f);
267 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
268
269 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
270 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
271
272 for (j = 0; j < 9; j++)
273 input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
274 break;
275
276
277 }
278
279 input_sync(dev);
280 }
281}
282
283static int grip_open(struct input_dev *dev)
284{
285 struct grip *grip = input_get_drvdata(dev);
286
287 gameport_start_polling(grip->gameport);
288 return 0;
289}
290
291static void grip_close(struct input_dev *dev)
292{
293 struct grip *grip = input_get_drvdata(dev);
294
295 gameport_stop_polling(grip->gameport);
296}
297
298static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
299{
300 struct grip *grip;
301 struct input_dev *input_dev;
302 unsigned int data[GRIP_LENGTH_XT];
303 int i, j, t;
304 int err;
305
306 if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
307 return -ENOMEM;
308
309 grip->gameport = gameport;
310
311 gameport_set_drvdata(gameport, grip);
312
313 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
314 if (err)
315 goto fail1;
316
317 for (i = 0; i < 2; i++) {
318 if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
319 grip->mode[i] = GRIP_MODE_GPP;
320 continue;
321 }
322 if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
323 if (!(data[3] & 7)) {
324 grip->mode[i] = GRIP_MODE_BD;
325 continue;
326 }
327 if (!(data[2] & 0xf0)) {
328 grip->mode[i] = GRIP_MODE_XT;
329 continue;
330 }
331 grip->mode[i] = GRIP_MODE_DC;
332 continue;
333 }
334 }
335
336 if (!grip->mode[0] && !grip->mode[1]) {
337 err = -ENODEV;
338 goto fail2;
339 }
340
341 gameport_set_poll_handler(gameport, grip_poll);
342 gameport_set_poll_interval(gameport, 20);
343
344 for (i = 0; i < 2; i++) {
345 if (!grip->mode[i])
346 continue;
347
348 grip->dev[i] = input_dev = input_allocate_device();
349 if (!input_dev) {
350 err = -ENOMEM;
351 goto fail3;
352 }
353
354 snprintf(grip->phys[i], sizeof(grip->phys[i]),
355 "%s/input%d", gameport->phys, i);
356
357 input_dev->name = grip_name[grip->mode[i]];
358 input_dev->phys = grip->phys[i];
359 input_dev->id.bustype = BUS_GAMEPORT;
360 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
361 input_dev->id.product = grip->mode[i];
362 input_dev->id.version = 0x0100;
363 input_dev->dev.parent = &gameport->dev;
364
365 input_set_drvdata(input_dev, grip);
366
367 input_dev->open = grip_open;
368 input_dev->close = grip_close;
369
370 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
371
372 for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
373
374 if (j < grip_cen[grip->mode[i]])
375 input_set_abs_params(input_dev, t, 14, 52, 1, 2);
376 else if (j < grip_anx[grip->mode[i]])
377 input_set_abs_params(input_dev, t, 3, 57, 1, 0);
378 else
379 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
380 }
381
382 for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
383 if (t > 0)
384 set_bit(t, input_dev->keybit);
385
386 err = input_register_device(grip->dev[i]);
387 if (err)
388 goto fail4;
389 }
390
391 return 0;
392
393 fail4: input_free_device(grip->dev[i]);
394 fail3: while (--i >= 0)
395 if (grip->dev[i])
396 input_unregister_device(grip->dev[i]);
397 fail2: gameport_close(gameport);
398 fail1: gameport_set_drvdata(gameport, NULL);
399 kfree(grip);
400 return err;
401}
402
403static void grip_disconnect(struct gameport *gameport)
404{
405 struct grip *grip = gameport_get_drvdata(gameport);
406 int i;
407
408 for (i = 0; i < 2; i++)
409 if (grip->dev[i])
410 input_unregister_device(grip->dev[i]);
411 gameport_close(gameport);
412 gameport_set_drvdata(gameport, NULL);
413 kfree(grip);
414}
415
416static struct gameport_driver grip_drv = {
417 .driver = {
418 .name = "grip",
419 .owner = THIS_MODULE,
420 },
421 .description = DRIVER_DESC,
422 .connect = grip_connect,
423 .disconnect = grip_disconnect,
424};
425
426module_gameport_driver(grip_drv);