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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / input / joystick / gamecon.c
blobe68e497864830f63a9dfa72ee7d5a4948bfb733a
1 /*
2 * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
3 *
4 * Copyright (c) 1999-2004 Vojtech Pavlik <vojtech@suse.cz>
5 * Copyright (c) 2004 Peter Nelson <rufus-kernel@hackish.org>
6 *
7 * Based on the work of:
8 * Andree Borrmann John Dahlstrom
9 * David Kuder Nathan Hand
10 * Raphael Assenat
11 */
12
13 /*
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 * Should you need to contact me, the author, you can do so either by
29 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
30 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
31 */
32
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35 #include <linux/kernel.h>
36 #include <linux/delay.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/parport.h>
40 #include <linux/input.h>
41 #include <linux/mutex.h>
42 #include <linux/slab.h>
43
44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
45 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
46 MODULE_LICENSE("GPL");
47
48 #define GC_MAX_PORTS 3
49 #define GC_MAX_DEVICES 5
50
51 struct gc_config {
52 int args[GC_MAX_DEVICES + 1];
53 unsigned int nargs;
54 };
55
56 static struct gc_config gc_cfg[GC_MAX_PORTS] __initdata;
57
58 module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
59 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
60 module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
61 MODULE_PARM_DESC(map2, "Describes second set of devices");
62 module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
63 MODULE_PARM_DESC(map3, "Describes third set of devices");
64
65 /* see also gs_psx_delay parameter in PSX support section */
66
67 enum gc_type {
68 GC_NONE = 0,
69 GC_SNES,
70 GC_NES,
71 GC_NES4,
72 GC_MULTI,
73 GC_MULTI2,
74 GC_N64,
75 GC_PSX,
76 GC_DDR,
77 GC_SNESMOUSE,
78 GC_MAX
79 };
80
81 #define GC_REFRESH_TIME HZ/100
82
83 struct gc_pad {
84 struct input_dev *dev;
85 enum gc_type type;
86 char phys[32];
87 };
88
89 struct gc {
90 struct pardevice *pd;
91 struct gc_pad pads[GC_MAX_DEVICES];
92 struct timer_list timer;
93 int pad_count[GC_MAX];
94 int used;
95 struct mutex mutex;
96 };
97
98 struct gc_subdev {
99 unsigned int idx;
100 };
101
102 static struct gc *gc_base[3];
103
104 static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
105
106 static const char *gc_names[] = {
107 NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
108 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
109 "PSX DDR controller", "SNES mouse"
110 };
111
112 /*
113 * N64 support.
114 */
115
116 static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
117 static const short gc_n64_btn[] = {
118 BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
119 BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
120 };
121
122 #define GC_N64_LENGTH 32 /* N64 bit length, not including stop bit */
123 #define GC_N64_STOP_LENGTH 5 /* Length of encoded stop bit */
124 #define GC_N64_CMD_00 0x11111111UL
125 #define GC_N64_CMD_01 0xd1111111UL
126 #define GC_N64_CMD_03 0xdd111111UL
127 #define GC_N64_CMD_1b 0xdd1dd111UL
128 #define GC_N64_CMD_c0 0x111111ddUL
129 #define GC_N64_CMD_80 0x1111111dUL
130 #define GC_N64_STOP_BIT 0x1d /* Encoded stop bit */
131 #define GC_N64_REQUEST_DATA GC_N64_CMD_01 /* the request data command */
132 #define GC_N64_DELAY 133 /* delay between transmit request, and response ready (us) */
133 #define GC_N64_DWS 3 /* delay between write segments (required for sound playback because of ISA DMA) */
134 /* GC_N64_DWS > 24 is known to fail */
135 #define GC_N64_POWER_W 0xe2 /* power during write (transmit request) */
136 #define GC_N64_POWER_R 0xfd /* power during read */
137 #define GC_N64_OUT 0x1d /* output bits to the 4 pads */
138 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
139 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
140 /* than 123 us */
141 #define GC_N64_CLOCK 0x02 /* clock bits for read */
142
143 /*
144 * Used for rumble code.
145 */
146
147 /* Send encoded command */
148 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
149 unsigned char target)
150 {
151 struct parport *port = gc->pd->port;
152 int i;
153
154 for (i = 0; i < GC_N64_LENGTH; i++) {
155 unsigned char data = (cmd >> i) & 1 ? target : 0;
156 parport_write_data(port, GC_N64_POWER_W | data);
157 udelay(GC_N64_DWS);
158 }
159 }
160
161 /* Send stop bit */
162 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
163 {
164 struct parport *port = gc->pd->port;
165 int i;
166
167 for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
168 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
169 parport_write_data(port, GC_N64_POWER_W | data);
170 udelay(GC_N64_DWS);
171 }
172 }
173
174 /*
175 * gc_n64_read_packet() reads an N64 packet.
176 * Each pad uses one bit per byte. So all pads connected to this port
177 * are read in parallel.
178 */
179
180 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
181 {
182 int i;
183 unsigned long flags;
184
185 /*
186 * Request the pad to transmit data
187 */
188
189 local_irq_save(flags);
190 gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
191 gc_n64_send_stop_bit(gc, GC_N64_OUT);
192 local_irq_restore(flags);
193
194 /*
195 * Wait for the pad response to be loaded into the 33-bit register
196 * of the adapter.
197 */
198
199 udelay(GC_N64_DELAY);
200
201 /*
202 * Grab data (ignoring the last bit, which is a stop bit)
203 */
204
205 for (i = 0; i < GC_N64_LENGTH; i++) {
206 parport_write_data(gc->pd->port, GC_N64_POWER_R);
207 udelay(2);
208 data[i] = parport_read_status(gc->pd->port);
209 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
210 }
211
212 /*
213 * We must wait 200 ms here for the controller to reinitialize before
214 * the next read request. No worries as long as gc_read is polled less
215 * frequently than this.
216 */
217
218 }
219
220 static void gc_n64_process_packet(struct gc *gc)
221 {
222 unsigned char data[GC_N64_LENGTH];
223 struct input_dev *dev;
224 int i, j, s;
225 signed char x, y;
226
227 gc_n64_read_packet(gc, data);
228
229 for (i = 0; i < GC_MAX_DEVICES; i++) {
230
231 if (gc->pads[i].type != GC_N64)
232 continue;
233
234 dev = gc->pads[i].dev;
235 s = gc_status_bit[i];
236
237 if (s & ~(data[8] | data[9])) {
238
239 x = y = 0;
240
241 for (j = 0; j < 8; j++) {
242 if (data[23 - j] & s)
243 x |= 1 << j;
244 if (data[31 - j] & s)
245 y |= 1 << j;
246 }
247
248 input_report_abs(dev, ABS_X, x);
249 input_report_abs(dev, ABS_Y, -y);
250
251 input_report_abs(dev, ABS_HAT0X,
252 !(s & data[6]) - !(s & data[7]));
253 input_report_abs(dev, ABS_HAT0Y,
254 !(s & data[4]) - !(s & data[5]));
255
256 for (j = 0; j < 10; j++)
257 input_report_key(dev, gc_n64_btn[j],
258 s & data[gc_n64_bytes[j]]);
259
260 input_sync(dev);
261 }
262 }
263 }
264
265 static int gc_n64_play_effect(struct input_dev *dev, void *data,
266 struct ff_effect *effect)
267 {
268 int i;
269 unsigned long flags;
270 struct gc *gc = input_get_drvdata(dev);
271 struct gc_subdev *sdev = data;
272 unsigned char target = 1 << sdev->idx; /* select desired pin */
273
274 if (effect->type == FF_RUMBLE) {
275 struct ff_rumble_effect *rumble = &effect->u.rumble;
276 unsigned int cmd =
277 rumble->strong_magnitude || rumble->weak_magnitude ?
278 GC_N64_CMD_01 : GC_N64_CMD_00;
279
280 local_irq_save(flags);
281
282 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
283 gc_n64_send_command(gc, GC_N64_CMD_03, target);
284 gc_n64_send_command(gc, GC_N64_CMD_80, target);
285 gc_n64_send_command(gc, GC_N64_CMD_01, target);
286 for (i = 0; i < 32; i++)
287 gc_n64_send_command(gc, GC_N64_CMD_80, target);
288 gc_n64_send_stop_bit(gc, target);
289
290 udelay(GC_N64_DELAY);
291
292 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
293 gc_n64_send_command(gc, GC_N64_CMD_03, target);
294 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
295 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
296 for (i = 0; i < 32; i++)
297 gc_n64_send_command(gc, cmd, target);
298 gc_n64_send_stop_bit(gc, target);
299
300 local_irq_restore(flags);
301
302 }
303
304 return 0;
305 }
306
307 static int __init gc_n64_init_ff(struct input_dev *dev, int i)
308 {
309 struct gc_subdev *sdev;
310 int err;
311
312 sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
313 if (!sdev)
314 return -ENOMEM;
315
316 sdev->idx = i;
317
318 input_set_capability(dev, EV_FF, FF_RUMBLE);
319
320 err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
321 if (err) {
322 kfree(sdev);
323 return err;
324 }
325
326 return 0;
327 }
328
329 /*
330 * NES/SNES support.
331 */
332
333 #define GC_NES_DELAY 6 /* Delay between bits - 6us */
334 #define GC_NES_LENGTH 8 /* The NES pads use 8 bits of data */
335 #define GC_SNES_LENGTH 12 /* The SNES true length is 16, but the
336 last 4 bits are unused */
337 #define GC_SNESMOUSE_LENGTH 32 /* The SNES mouse uses 32 bits, the first
338 16 bits are equivalent to a gamepad */
339
340 #define GC_NES_POWER 0xfc
341 #define GC_NES_CLOCK 0x01
342 #define GC_NES_LATCH 0x02
343
344 static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
345 static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
346 static const short gc_snes_btn[] = {
347 BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
348 };
349
350 /*
351 * gc_nes_read_packet() reads a NES/SNES packet.
352 * Each pad uses one bit per byte. So all pads connected to
353 * this port are read in parallel.
354 */
355
356 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
357 {
358 int i;
359
360 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
361 udelay(GC_NES_DELAY * 2);
362 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
363
364 for (i = 0; i < length; i++) {
365 udelay(GC_NES_DELAY);
366 parport_write_data(gc->pd->port, GC_NES_POWER);
367 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
368 udelay(GC_NES_DELAY);
369 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
370 }
371 }
372
373 static void gc_nes_process_packet(struct gc *gc)
374 {
375 unsigned char data[GC_SNESMOUSE_LENGTH];
376 struct gc_pad *pad;
377 struct input_dev *dev;
378 int i, j, s, len;
379 char x_rel, y_rel;
380
381 len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
382 (gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
383
384 gc_nes_read_packet(gc, len, data);
385
386 for (i = 0; i < GC_MAX_DEVICES; i++) {
387
388 pad = &gc->pads[i];
389 dev = pad->dev;
390 s = gc_status_bit[i];
391
392 switch (pad->type) {
393
394 case GC_NES:
395
396 input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
397 input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
398
399 for (j = 0; j < 4; j++)
400 input_report_key(dev, gc_snes_btn[j],
401 s & data[gc_nes_bytes[j]]);
402 input_sync(dev);
403 break;
404
405 case GC_SNES:
406
407 input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
408 input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
409
410 for (j = 0; j < 8; j++)
411 input_report_key(dev, gc_snes_btn[j],
412 s & data[gc_snes_bytes[j]]);
413 input_sync(dev);
414 break;
415
416 case GC_SNESMOUSE:
417 /*
418 * The 4 unused bits from SNES controllers appear
419 * to be ID bits so use them to make sure we are
420 * dealing with a mouse.
421 * gamepad is connected. This is important since
422 * my SNES gamepad sends 1's for bits 16-31, which
423 * cause the mouse pointer to quickly move to the
424 * upper left corner of the screen.
425 */
426 if (!(s & data[12]) && !(s & data[13]) &&
427 !(s & data[14]) && (s & data[15])) {
428 input_report_key(dev, BTN_LEFT, s & data[9]);
429 input_report_key(dev, BTN_RIGHT, s & data[8]);
430
431 x_rel = y_rel = 0;
432 for (j = 0; j < 7; j++) {
433 x_rel <<= 1;
434 if (data[25 + j] & s)
435 x_rel |= 1;
436
437 y_rel <<= 1;
438 if (data[17 + j] & s)
439 y_rel |= 1;
440 }
441
442 if (x_rel) {
443 if (data[24] & s)
444 x_rel = -x_rel;
445 input_report_rel(dev, REL_X, x_rel);
446 }
447
448 if (y_rel) {
449 if (data[16] & s)
450 y_rel = -y_rel;
451 input_report_rel(dev, REL_Y, y_rel);
452 }
453
454 input_sync(dev);
455 }
456 break;
457
458 default:
459 break;
460 }
461 }
462 }
463
464 /*
465 * Multisystem joystick support
466 */
467
468 #define GC_MULTI_LENGTH 5 /* Multi system joystick packet length is 5 */
469 #define GC_MULTI2_LENGTH 6 /* One more bit for one more button */
470
471 /*
472 * gc_multi_read_packet() reads a Multisystem joystick packet.
473 */
474
475 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
476 {
477 int i;
478
479 for (i = 0; i < length; i++) {
480 parport_write_data(gc->pd->port, ~(1 << i));
481 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
482 }
483 }
484
485 static void gc_multi_process_packet(struct gc *gc)
486 {
487 unsigned char data[GC_MULTI2_LENGTH];
488 int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
489 struct gc_pad *pad;
490 struct input_dev *dev;
491 int i, s;
492
493 gc_multi_read_packet(gc, data_len, data);
494
495 for (i = 0; i < GC_MAX_DEVICES; i++) {
496 pad = &gc->pads[i];
497 dev = pad->dev;
498 s = gc_status_bit[i];
499
500 switch (pad->type) {
501 case GC_MULTI2:
502 input_report_key(dev, BTN_THUMB, s & data[5]);
503 /* fall through */
504
505 case GC_MULTI:
506 input_report_abs(dev, ABS_X,
507 !(s & data[2]) - !(s & data[3]));
508 input_report_abs(dev, ABS_Y,
509 !(s & data[0]) - !(s & data[1]));
510 input_report_key(dev, BTN_TRIGGER, s & data[4]);
511 input_sync(dev);
512 break;
513
514 default:
515 break;
516 }
517 }
518 }
519
520 /*
521 * PSX support
522 *
523 * See documentation at:
524 * http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt
525 * http://www.gamesx.com/controldata/psxcont/psxcont.htm
526 *
527 */
528
529 #define GC_PSX_DELAY 25 /* 25 usec */
530 #define GC_PSX_LENGTH 8 /* talk to the controller in bits */
531 #define GC_PSX_BYTES 6 /* the maximum number of bytes to read off the controller */
532
533 #define GC_PSX_MOUSE 1 /* Mouse */
534 #define GC_PSX_NEGCON 2 /* NegCon */
535 #define GC_PSX_NORMAL 4 /* Digital / Analog or Rumble in Digital mode */
536 #define GC_PSX_ANALOG 5 /* Analog in Analog mode / Rumble in Green mode */
537 #define GC_PSX_RUMBLE 7 /* Rumble in Red mode */
538
539 #define GC_PSX_CLOCK 0x04 /* Pin 4 */
540 #define GC_PSX_COMMAND 0x01 /* Pin 2 */
541 #define GC_PSX_POWER 0xf8 /* Pins 5-9 */
542 #define GC_PSX_SELECT 0x02 /* Pin 3 */
543
544 #define GC_PSX_ID(x) ((x) >> 4) /* High nibble is device type */
545 #define GC_PSX_LEN(x) (((x) & 0xf) << 1) /* Low nibble is length in bytes/2 */
546
547 static int gc_psx_delay = GC_PSX_DELAY;
548 module_param_named(psx_delay, gc_psx_delay, uint, 0);
549 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
550
551 static const short gc_psx_abs[] = {
552 ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
553 };
554 static const short gc_psx_btn[] = {
555 BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
556 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
557 };
558 static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
559
560 /*
561 * gc_psx_command() writes 8bit command and reads 8bit data from
562 * the psx pad.
563 */
564
565 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
566 {
567 struct parport *port = gc->pd->port;
568 int i, j, cmd, read;
569
570 memset(data, 0, GC_MAX_DEVICES);
571
572 for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
573 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
574 parport_write_data(port, cmd | GC_PSX_POWER);
575 udelay(gc_psx_delay);
576
577 read = parport_read_status(port) ^ 0x80;
578
579 for (j = 0; j < GC_MAX_DEVICES; j++) {
580 struct gc_pad *pad = &gc->pads[j];
581
582 if (pad->type == GC_PSX || pad->type == GC_DDR)
583 data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
584 }
585
586 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
587 udelay(gc_psx_delay);
588 }
589 }
590
591 /*
592 * gc_psx_read_packet() reads a whole psx packet and returns
593 * device identifier code.
594 */
595
596 static void gc_psx_read_packet(struct gc *gc,
597 unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
598 unsigned char id[GC_MAX_DEVICES])
599 {
600 int i, j, max_len = 0;
601 unsigned long flags;
602 unsigned char data2[GC_MAX_DEVICES];
603
604 /* Select pad */
605 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
606 udelay(gc_psx_delay);
607 /* Deselect, begin command */
608 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
609 udelay(gc_psx_delay);
610
611 local_irq_save(flags);
612
613 gc_psx_command(gc, 0x01, data2); /* Access pad */
614 gc_psx_command(gc, 0x42, id); /* Get device ids */
615 gc_psx_command(gc, 0, data2); /* Dump status */
616
617 /* Find the longest pad */
618 for (i = 0; i < GC_MAX_DEVICES; i++) {
619 struct gc_pad *pad = &gc->pads[i];
620
621 if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
622 GC_PSX_LEN(id[i]) > max_len &&
623 GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
624 max_len = GC_PSX_LEN(id[i]);
625 }
626 }
627
628 /* Read in all the data */
629 for (i = 0; i < max_len; i++) {
630 gc_psx_command(gc, 0, data2);
631 for (j = 0; j < GC_MAX_DEVICES; j++)
632 data[j][i] = data2[j];
633 }
634
635 local_irq_restore(flags);
636
637 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
638
639 /* Set id's to the real value */
640 for (i = 0; i < GC_MAX_DEVICES; i++)
641 id[i] = GC_PSX_ID(id[i]);
642 }
643
644 static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
645 unsigned char *data)
646 {
647 struct input_dev *dev = pad->dev;
648 int i;
649
650 switch (psx_type) {
651
652 case GC_PSX_RUMBLE:
653
654 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
655 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
656
657 case GC_PSX_NEGCON:
658 case GC_PSX_ANALOG:
659
660 if (pad->type == GC_DDR) {
661 for (i = 0; i < 4; i++)
662 input_report_key(dev, gc_psx_ddr_btn[i],
663 ~data[0] & (0x10 << i));
664 } else {
665 for (i = 0; i < 4; i++)
666 input_report_abs(dev, gc_psx_abs[i + 2],
667 data[i + 2]);
668
669 input_report_abs(dev, ABS_X,
670 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
671 input_report_abs(dev, ABS_Y,
672 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
673 }
674
675 for (i = 0; i < 8; i++)
676 input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
677
678 input_report_key(dev, BTN_START, ~data[0] & 0x08);
679 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
680
681 input_sync(dev);
682
683 break;
684
685 case GC_PSX_NORMAL:
686
687 if (pad->type == GC_DDR) {
688 for (i = 0; i < 4; i++)
689 input_report_key(dev, gc_psx_ddr_btn[i],
690 ~data[0] & (0x10 << i));
691 } else {
692 input_report_abs(dev, ABS_X,
693 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
694 input_report_abs(dev, ABS_Y,
695 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
696
697 /*
698 * For some reason if the extra axes are left unset
699 * they drift.
700 * for (i = 0; i < 4; i++)
701 input_report_abs(dev, gc_psx_abs[i + 2], 128);
702 * This needs to be debugged properly,
703 * maybe fuzz processing needs to be done
704 * in input_sync()
705 * --vojtech
706 */
707 }
708
709 for (i = 0; i < 8; i++)
710 input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
711
712 input_report_key(dev, BTN_START, ~data[0] & 0x08);
713 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
714
715 input_sync(dev);
716
717 break;
718
719 default: /* not a pad, ignore */
720 break;
721 }
722 }
723
724 static void gc_psx_process_packet(struct gc *gc)
725 {
726 unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
727 unsigned char id[GC_MAX_DEVICES];
728 struct gc_pad *pad;
729 int i;
730
731 gc_psx_read_packet(gc, data, id);
732
733 for (i = 0; i < GC_MAX_DEVICES; i++) {
734 pad = &gc->pads[i];
735 if (pad->type == GC_PSX || pad->type == GC_DDR)
736 gc_psx_report_one(pad, id[i], data[i]);
737 }
738 }
739
740 /*
741 * gc_timer() initiates reads of console pads data.
742 */
743
744 static void gc_timer(unsigned long private)
745 {
746 struct gc *gc = (void *) private;
747
748 /*
749 * N64 pads - must be read first, any read confuses them for 200 us
750 */
751
752 if (gc->pad_count[GC_N64])
753 gc_n64_process_packet(gc);
754
755 /*
756 * NES and SNES pads or mouse
757 */
758
759 if (gc->pad_count[GC_NES] ||
760 gc->pad_count[GC_SNES] ||
761 gc->pad_count[GC_SNESMOUSE]) {
762 gc_nes_process_packet(gc);
763 }
764
765 /*
766 * Multi and Multi2 joysticks
767 */
768
769 if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
770 gc_multi_process_packet(gc);
771
772 /*
773 * PSX controllers
774 */
775
776 if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
777 gc_psx_process_packet(gc);
778
779 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
780 }
781
782 static int gc_open(struct input_dev *dev)
783 {
784 struct gc *gc = input_get_drvdata(dev);
785 int err;
786
787 err = mutex_lock_interruptible(&gc->mutex);
788 if (err)
789 return err;
790
791 if (!gc->used++) {
792 parport_claim(gc->pd);
793 parport_write_control(gc->pd->port, 0x04);
794 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
795 }
796
797 mutex_unlock(&gc->mutex);
798 return 0;
799 }
800
801 static void gc_close(struct input_dev *dev)
802 {
803 struct gc *gc = input_get_drvdata(dev);
804
805 mutex_lock(&gc->mutex);
806 if (!--gc->used) {
807 del_timer_sync(&gc->timer);
808 parport_write_control(gc->pd->port, 0x00);
809 parport_release(gc->pd);
810 }
811 mutex_unlock(&gc->mutex);
812 }
813
814 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
815 {
816 struct gc_pad *pad = &gc->pads[idx];
817 struct input_dev *input_dev;
818 int i;
819 int err;
820
821 if (pad_type < 1 || pad_type >= GC_MAX) {
822 pr_err("Pad type %d unknown\n", pad_type);
823 return -EINVAL;
824 }
825
826 pad->dev = input_dev = input_allocate_device();
827 if (!input_dev) {
828 pr_err("Not enough memory for input device\n");
829 return -ENOMEM;
830 }
831
832 pad->type = pad_type;
833
834 snprintf(pad->phys, sizeof(pad->phys),
835 "%s/input%d", gc->pd->port->name, idx);
836
837 input_dev->name = gc_names[pad_type];
838 input_dev->phys = pad->phys;
839 input_dev->id.bustype = BUS_PARPORT;
840 input_dev->id.vendor = 0x0001;
841 input_dev->id.product = pad_type;
842 input_dev->id.version = 0x0100;
843
844 input_set_drvdata(input_dev, gc);
845
846 input_dev->open = gc_open;
847 input_dev->close = gc_close;
848
849 if (pad_type != GC_SNESMOUSE) {
850 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
851
852 for (i = 0; i < 2; i++)
853 input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
854 } else
855 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
856
857 gc->pad_count[pad_type]++;
858
859 switch (pad_type) {
860
861 case GC_N64:
862 for (i = 0; i < 10; i++)
863 __set_bit(gc_n64_btn[i], input_dev->keybit);
864
865 for (i = 0; i < 2; i++) {
866 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
867 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
868 }
869
870 err = gc_n64_init_ff(input_dev, idx);
871 if (err) {
872 pr_warning("Failed to initiate rumble for N64 device %d\n", idx);
873 goto err_free_dev;
874 }
875
876 break;
877
878 case GC_SNESMOUSE:
879 __set_bit(BTN_LEFT, input_dev->keybit);
880 __set_bit(BTN_RIGHT, input_dev->keybit);
881 __set_bit(REL_X, input_dev->relbit);
882 __set_bit(REL_Y, input_dev->relbit);
883 break;
884
885 case GC_SNES:
886 for (i = 4; i < 8; i++)
887 __set_bit(gc_snes_btn[i], input_dev->keybit);
888 case GC_NES:
889 for (i = 0; i < 4; i++)
890 __set_bit(gc_snes_btn[i], input_dev->keybit);
891 break;
892
893 case GC_MULTI2:
894 __set_bit(BTN_THUMB, input_dev->keybit);
895 case GC_MULTI:
896 __set_bit(BTN_TRIGGER, input_dev->keybit);
897 break;
898
899 case GC_PSX:
900 for (i = 0; i < 6; i++)
901 input_set_abs_params(input_dev,
902 gc_psx_abs[i], 4, 252, 0, 2);
903 for (i = 0; i < 12; i++)
904 __set_bit(gc_psx_btn[i], input_dev->keybit);
905
906 break;
907
908 case GC_DDR:
909 for (i = 0; i < 4; i++)
910 __set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
911 for (i = 0; i < 12; i++)
912 __set_bit(gc_psx_btn[i], input_dev->keybit);
913
914 break;
915 }
916
917 err = input_register_device(pad->dev);
918 if (err)
919 goto err_free_dev;
920
921 return 0;
922
923 err_free_dev:
924 input_free_device(pad->dev);
925 pad->dev = NULL;
926 return err;
927 }
928
929 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
930 {
931 struct gc *gc;
932 struct parport *pp;
933 struct pardevice *pd;
934 int i;
935 int count = 0;
936 int err;
937
938 pp = parport_find_number(parport);
939 if (!pp) {
940 pr_err("no such parport %d\n", parport);
941 err = -EINVAL;
942 goto err_out;
943 }
944
945 pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
946 if (!pd) {
947 pr_err("parport busy already - lp.o loaded?\n");
948 err = -EBUSY;
949 goto err_put_pp;
950 }
951
952 gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
953 if (!gc) {
954 pr_err("Not enough memory\n");
955 err = -ENOMEM;
956 goto err_unreg_pardev;
957 }
958
959 mutex_init(&gc->mutex);
960 gc->pd = pd;
961 setup_timer(&gc->timer, gc_timer, (long) gc);
962
963 for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
964 if (!pads[i])
965 continue;
966
967 err = gc_setup_pad(gc, i, pads[i]);
968 if (err)
969 goto err_unreg_devs;
970
971 count++;
972 }
973
974 if (count == 0) {
975 pr_err("No valid devices specified\n");
976 err = -EINVAL;
977 goto err_free_gc;
978 }
979
980 parport_put_port(pp);
981 return gc;
982
983 err_unreg_devs:
984 while (--i >= 0)
985 if (gc->pads[i].dev)
986 input_unregister_device(gc->pads[i].dev);
987 err_free_gc:
988 kfree(gc);
989 err_unreg_pardev:
990 parport_unregister_device(pd);
991 err_put_pp:
992 parport_put_port(pp);
993 err_out:
994 return ERR_PTR(err);
995 }
996
997 static void gc_remove(struct gc *gc)
998 {
999 int i;
1000
1001 for (i = 0; i < GC_MAX_DEVICES; i++)
1002 if (gc->pads[i].dev)
1003 input_unregister_device(gc->pads[i].dev);
1004 parport_unregister_device(gc->pd);
1005 kfree(gc);
1006 }
1007
1008 static int __init gc_init(void)
1009 {
1010 int i;
1011 int have_dev = 0;
1012 int err = 0;
1013
1014 for (i = 0; i < GC_MAX_PORTS; i++) {
1015 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
1016 continue;
1017
1018 if (gc_cfg[i].nargs < 2) {
1019 pr_err("at least one device must be specified\n");
1020 err = -EINVAL;
1021 break;
1022 }
1023
1024 gc_base[i] = gc_probe(gc_cfg[i].args[0],
1025 gc_cfg[i].args + 1, gc_cfg[i].nargs - 1);
1026 if (IS_ERR(gc_base[i])) {
1027 err = PTR_ERR(gc_base[i]);
1028 break;
1029 }
1030
1031 have_dev = 1;
1032 }
1033
1034 if (err) {
1035 while (--i >= 0)
1036 if (gc_base[i])
1037 gc_remove(gc_base[i]);
1038 return err;
1039 }
1040
1041 return have_dev ? 0 : -ENODEV;
1042 }
1043
1044 static void __exit gc_exit(void)
1045 {
1046 int i;
1047
1048 for (i = 0; i < GC_MAX_PORTS; i++)
1049 if (gc_base[i])
1050 gc_remove(gc_base[i]);
1051 }
1052
1053 module_init(gc_init);
1054 module_exit(gc_exit);