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staging: iio: Documentation fixes
[zen-stable.git] / drivers / input / joystick / gamecon.c
blobfbd62abb66f9dc3017fc4f678dddd28cd889309e
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 input_dev *dev[GC_MAX_DEVICES];
93 struct timer_list timer;
94 int pad_count[GC_MAX];
95 int used;
96 struct mutex mutex;
97 };
98
99 struct gc_subdev {
100 unsigned int idx;
101 };
102
103 static struct gc *gc_base[3];
104
105 static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
106
107 static const char *gc_names[] = {
108 NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
109 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
110 "PSX DDR controller", "SNES mouse"
111 };
112
113 /*
114 * N64 support.
115 */
116
117 static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
118 static const short gc_n64_btn[] = {
119 BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
120 BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
121 };
122
123 #define GC_N64_LENGTH 32 /* N64 bit length, not including stop bit */
124 #define GC_N64_STOP_LENGTH 5 /* Length of encoded stop bit */
125 #define GC_N64_CMD_00 0x11111111UL
126 #define GC_N64_CMD_01 0xd1111111UL
127 #define GC_N64_CMD_03 0xdd111111UL
128 #define GC_N64_CMD_1b 0xdd1dd111UL
129 #define GC_N64_CMD_c0 0x111111ddUL
130 #define GC_N64_CMD_80 0x1111111dUL
131 #define GC_N64_STOP_BIT 0x1d /* Encoded stop bit */
132 #define GC_N64_REQUEST_DATA GC_N64_CMD_01 /* the request data command */
133 #define GC_N64_DELAY 133 /* delay between transmit request, and response ready (us) */
134 #define GC_N64_DWS 3 /* delay between write segments (required for sound playback because of ISA DMA) */
135 /* GC_N64_DWS > 24 is known to fail */
136 #define GC_N64_POWER_W 0xe2 /* power during write (transmit request) */
137 #define GC_N64_POWER_R 0xfd /* power during read */
138 #define GC_N64_OUT 0x1d /* output bits to the 4 pads */
139 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
140 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
141 /* than 123 us */
142 #define GC_N64_CLOCK 0x02 /* clock bits for read */
143
144 /*
145 * Used for rumble code.
146 */
147
148 /* Send encoded command */
149 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
150 unsigned char target)
151 {
152 struct parport *port = gc->pd->port;
153 int i;
154
155 for (i = 0; i < GC_N64_LENGTH; i++) {
156 unsigned char data = (cmd >> i) & 1 ? target : 0;
157 parport_write_data(port, GC_N64_POWER_W | data);
158 udelay(GC_N64_DWS);
159 }
160 }
161
162 /* Send stop bit */
163 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
164 {
165 struct parport *port = gc->pd->port;
166 int i;
167
168 for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
169 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
170 parport_write_data(port, GC_N64_POWER_W | data);
171 udelay(GC_N64_DWS);
172 }
173 }
174
175 /*
176 * gc_n64_read_packet() reads an N64 packet.
177 * Each pad uses one bit per byte. So all pads connected to this port
178 * are read in parallel.
179 */
180
181 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
182 {
183 int i;
184 unsigned long flags;
185
186 /*
187 * Request the pad to transmit data
188 */
189
190 local_irq_save(flags);
191 gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
192 gc_n64_send_stop_bit(gc, GC_N64_OUT);
193 local_irq_restore(flags);
194
195 /*
196 * Wait for the pad response to be loaded into the 33-bit register
197 * of the adapter.
198 */
199
200 udelay(GC_N64_DELAY);
201
202 /*
203 * Grab data (ignoring the last bit, which is a stop bit)
204 */
205
206 for (i = 0; i < GC_N64_LENGTH; i++) {
207 parport_write_data(gc->pd->port, GC_N64_POWER_R);
208 udelay(2);
209 data[i] = parport_read_status(gc->pd->port);
210 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
211 }
212
213 /*
214 * We must wait 200 ms here for the controller to reinitialize before
215 * the next read request. No worries as long as gc_read is polled less
216 * frequently than this.
217 */
218
219 }
220
221 static void gc_n64_process_packet(struct gc *gc)
222 {
223 unsigned char data[GC_N64_LENGTH];
224 struct input_dev *dev;
225 int i, j, s;
226 signed char x, y;
227
228 gc_n64_read_packet(gc, data);
229
230 for (i = 0; i < GC_MAX_DEVICES; i++) {
231
232 if (gc->pads[i].type != GC_N64)
233 continue;
234
235 dev = gc->pads[i].dev;
236 s = gc_status_bit[i];
237
238 if (s & ~(data[8] | data[9])) {
239
240 x = y = 0;
241
242 for (j = 0; j < 8; j++) {
243 if (data[23 - j] & s)
244 x |= 1 << j;
245 if (data[31 - j] & s)
246 y |= 1 << j;
247 }
248
249 input_report_abs(dev, ABS_X, x);
250 input_report_abs(dev, ABS_Y, -y);
251
252 input_report_abs(dev, ABS_HAT0X,
253 !(s & data[6]) - !(s & data[7]));
254 input_report_abs(dev, ABS_HAT0Y,
255 !(s & data[4]) - !(s & data[5]));
256
257 for (j = 0; j < 10; j++)
258 input_report_key(dev, gc_n64_btn[j],
259 s & data[gc_n64_bytes[j]]);
260
261 input_sync(dev);
262 }
263 }
264 }
265
266 static int gc_n64_play_effect(struct input_dev *dev, void *data,
267 struct ff_effect *effect)
268 {
269 int i;
270 unsigned long flags;
271 struct gc *gc = input_get_drvdata(dev);
272 struct gc_subdev *sdev = data;
273 unsigned char target = 1 << sdev->idx; /* select desired pin */
274
275 if (effect->type == FF_RUMBLE) {
276 struct ff_rumble_effect *rumble = &effect->u.rumble;
277 unsigned int cmd =
278 rumble->strong_magnitude || rumble->weak_magnitude ?
279 GC_N64_CMD_01 : GC_N64_CMD_00;
280
281 local_irq_save(flags);
282
283 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
284 gc_n64_send_command(gc, GC_N64_CMD_03, target);
285 gc_n64_send_command(gc, GC_N64_CMD_80, target);
286 gc_n64_send_command(gc, GC_N64_CMD_01, target);
287 for (i = 0; i < 32; i++)
288 gc_n64_send_command(gc, GC_N64_CMD_80, target);
289 gc_n64_send_stop_bit(gc, target);
290
291 udelay(GC_N64_DELAY);
292
293 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
294 gc_n64_send_command(gc, GC_N64_CMD_03, target);
295 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
296 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
297 for (i = 0; i < 32; i++)
298 gc_n64_send_command(gc, cmd, target);
299 gc_n64_send_stop_bit(gc, target);
300
301 local_irq_restore(flags);
302
303 }
304
305 return 0;
306 }
307
308 static int __init gc_n64_init_ff(struct input_dev *dev, int i)
309 {
310 struct gc_subdev *sdev;
311 int err;
312
313 sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
314 if (!sdev)
315 return -ENOMEM;
316
317 sdev->idx = i;
318
319 input_set_capability(dev, EV_FF, FF_RUMBLE);
320
321 err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
322 if (err) {
323 kfree(sdev);
324 return err;
325 }
326
327 return 0;
328 }
329
330 /*
331 * NES/SNES support.
332 */
333
334 #define GC_NES_DELAY 6 /* Delay between bits - 6us */
335 #define GC_NES_LENGTH 8 /* The NES pads use 8 bits of data */
336 #define GC_SNES_LENGTH 12 /* The SNES true length is 16, but the
337 last 4 bits are unused */
338 #define GC_SNESMOUSE_LENGTH 32 /* The SNES mouse uses 32 bits, the first
339 16 bits are equivalent to a gamepad */
340
341 #define GC_NES_POWER 0xfc
342 #define GC_NES_CLOCK 0x01
343 #define GC_NES_LATCH 0x02
344
345 static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
346 static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
347 static const short gc_snes_btn[] = {
348 BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
349 };
350
351 /*
352 * gc_nes_read_packet() reads a NES/SNES packet.
353 * Each pad uses one bit per byte. So all pads connected to
354 * this port are read in parallel.
355 */
356
357 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
358 {
359 int i;
360
361 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
362 udelay(GC_NES_DELAY * 2);
363 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
364
365 for (i = 0; i < length; i++) {
366 udelay(GC_NES_DELAY);
367 parport_write_data(gc->pd->port, GC_NES_POWER);
368 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
369 udelay(GC_NES_DELAY);
370 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
371 }
372 }
373
374 static void gc_nes_process_packet(struct gc *gc)
375 {
376 unsigned char data[GC_SNESMOUSE_LENGTH];
377 struct gc_pad *pad;
378 struct input_dev *dev;
379 int i, j, s, len;
380 char x_rel, y_rel;
381
382 len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
383 (gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
384
385 gc_nes_read_packet(gc, len, data);
386
387 for (i = 0; i < GC_MAX_DEVICES; i++) {
388
389 pad = &gc->pads[i];
390 dev = gc->dev[i];
391 s = gc_status_bit[i];
392
393 switch (pad->type) {
394
395 case GC_NES:
396
397 input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
398 input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
399
400 for (j = 0; j < 4; j++)
401 input_report_key(dev, gc_snes_btn[j],
402 s & data[gc_nes_bytes[j]]);
403 input_sync(dev);
404 break;
405
406 case GC_SNES:
407
408 input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
409 input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
410
411 for (j = 0; j < 8; j++)
412 input_report_key(dev, gc_snes_btn[j],
413 s & data[gc_snes_bytes[j]]);
414 input_sync(dev);
415 break;
416
417 case GC_SNESMOUSE:
418 /*
419 * The 4 unused bits from SNES controllers appear
420 * to be ID bits so use them to make sure we are
421 * dealing with a mouse.
422 * gamepad is connected. This is important since
423 * my SNES gamepad sends 1's for bits 16-31, which
424 * cause the mouse pointer to quickly move to the
425 * upper left corner of the screen.
426 */
427 if (!(s & data[12]) && !(s & data[13]) &&
428 !(s & data[14]) && (s & data[15])) {
429 input_report_key(dev, BTN_LEFT, s & data[9]);
430 input_report_key(dev, BTN_RIGHT, s & data[8]);
431
432 x_rel = y_rel = 0;
433 for (j = 0; j < 7; j++) {
434 x_rel <<= 1;
435 if (data[25 + j] & s)
436 x_rel |= 1;
437
438 y_rel <<= 1;
439 if (data[17 + j] & s)
440 y_rel |= 1;
441 }
442
443 if (x_rel) {
444 if (data[24] & s)
445 x_rel = -x_rel;
446 input_report_rel(dev, REL_X, x_rel);
447 }
448
449 if (y_rel) {
450 if (data[16] & s)
451 y_rel = -y_rel;
452 input_report_rel(dev, REL_Y, y_rel);
453 }
454
455 input_sync(dev);
456 }
457 break;
458
459 default:
460 break;
461 }
462 }
463 }
464
465 /*
466 * Multisystem joystick support
467 */
468
469 #define GC_MULTI_LENGTH 5 /* Multi system joystick packet length is 5 */
470 #define GC_MULTI2_LENGTH 6 /* One more bit for one more button */
471
472 /*
473 * gc_multi_read_packet() reads a Multisystem joystick packet.
474 */
475
476 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
477 {
478 int i;
479
480 for (i = 0; i < length; i++) {
481 parport_write_data(gc->pd->port, ~(1 << i));
482 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
483 }
484 }
485
486 static void gc_multi_process_packet(struct gc *gc)
487 {
488 unsigned char data[GC_MULTI2_LENGTH];
489 int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
490 struct gc_pad *pad;
491 struct input_dev *dev;
492 int i, s;
493
494 gc_multi_read_packet(gc, data_len, data);
495
496 for (i = 0; i < GC_MAX_DEVICES; i++) {
497 pad = &gc->pads[i];
498 dev = pad->dev;
499 s = gc_status_bit[i];
500
501 switch (pad->type) {
502 case GC_MULTI2:
503 input_report_key(dev, BTN_THUMB, s & data[5]);
504 /* fall through */
505
506 case GC_MULTI:
507 input_report_abs(dev, ABS_X,
508 !(s & data[2]) - !(s & data[3]));
509 input_report_abs(dev, ABS_Y,
510 !(s & data[0]) - !(s & data[1]));
511 input_report_key(dev, BTN_TRIGGER, s & data[4]);
512 input_sync(dev);
513 break;
514
515 default:
516 break;
517 }
518 }
519 }
520
521 /*
522 * PSX support
523 *
524 * See documentation at:
525 * http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
526 * http://www.gamesx.com/controldata/psxcont/psxcont.htm
527 * ftp://milano.usal.es/pablo/
528 *
529 */
530
531 #define GC_PSX_DELAY 25 /* 25 usec */
532 #define GC_PSX_LENGTH 8 /* talk to the controller in bits */
533 #define GC_PSX_BYTES 6 /* the maximum number of bytes to read off the controller */
534
535 #define GC_PSX_MOUSE 1 /* Mouse */
536 #define GC_PSX_NEGCON 2 /* NegCon */
537 #define GC_PSX_NORMAL 4 /* Digital / Analog or Rumble in Digital mode */
538 #define GC_PSX_ANALOG 5 /* Analog in Analog mode / Rumble in Green mode */
539 #define GC_PSX_RUMBLE 7 /* Rumble in Red mode */
540
541 #define GC_PSX_CLOCK 0x04 /* Pin 4 */
542 #define GC_PSX_COMMAND 0x01 /* Pin 2 */
543 #define GC_PSX_POWER 0xf8 /* Pins 5-9 */
544 #define GC_PSX_SELECT 0x02 /* Pin 3 */
545
546 #define GC_PSX_ID(x) ((x) >> 4) /* High nibble is device type */
547 #define GC_PSX_LEN(x) (((x) & 0xf) << 1) /* Low nibble is length in bytes/2 */
548
549 static int gc_psx_delay = GC_PSX_DELAY;
550 module_param_named(psx_delay, gc_psx_delay, uint, 0);
551 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
552
553 static const short gc_psx_abs[] = {
554 ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
555 };
556 static const short gc_psx_btn[] = {
557 BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
558 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
559 };
560 static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
561
562 /*
563 * gc_psx_command() writes 8bit command and reads 8bit data from
564 * the psx pad.
565 */
566
567 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
568 {
569 struct parport *port = gc->pd->port;
570 int i, j, cmd, read;
571
572 memset(data, 0, GC_MAX_DEVICES);
573
574 for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
575 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
576 parport_write_data(port, cmd | GC_PSX_POWER);
577 udelay(gc_psx_delay);
578
579 read = parport_read_status(port) ^ 0x80;
580
581 for (j = 0; j < GC_MAX_DEVICES; j++) {
582 struct gc_pad *pad = &gc->pads[i];
583
584 if (pad->type == GC_PSX || pad->type == GC_DDR)
585 data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
586 }
587
588 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
589 udelay(gc_psx_delay);
590 }
591 }
592
593 /*
594 * gc_psx_read_packet() reads a whole psx packet and returns
595 * device identifier code.
596 */
597
598 static void gc_psx_read_packet(struct gc *gc,
599 unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
600 unsigned char id[GC_MAX_DEVICES])
601 {
602 int i, j, max_len = 0;
603 unsigned long flags;
604 unsigned char data2[GC_MAX_DEVICES];
605
606 /* Select pad */
607 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
608 udelay(gc_psx_delay);
609 /* Deselect, begin command */
610 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
611 udelay(gc_psx_delay);
612
613 local_irq_save(flags);
614
615 gc_psx_command(gc, 0x01, data2); /* Access pad */
616 gc_psx_command(gc, 0x42, id); /* Get device ids */
617 gc_psx_command(gc, 0, data2); /* Dump status */
618
619 /* Find the longest pad */
620 for (i = 0; i < GC_MAX_DEVICES; i++) {
621 struct gc_pad *pad = &gc->pads[i];
622
623 if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
624 GC_PSX_LEN(id[i]) > max_len &&
625 GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
626 max_len = GC_PSX_LEN(id[i]);
627 }
628 }
629
630 /* Read in all the data */
631 for (i = 0; i < max_len; i++) {
632 gc_psx_command(gc, 0, data2);
633 for (j = 0; j < GC_MAX_DEVICES; j++)
634 data[j][i] = data2[j];
635 }
636
637 local_irq_restore(flags);
638
639 parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
640
641 /* Set id's to the real value */
642 for (i = 0; i < GC_MAX_DEVICES; i++)
643 id[i] = GC_PSX_ID(id[i]);
644 }
645
646 static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
647 unsigned char *data)
648 {
649 struct input_dev *dev = pad->dev;
650 int i;
651
652 switch (psx_type) {
653
654 case GC_PSX_RUMBLE:
655
656 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
657 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
658
659 case GC_PSX_NEGCON:
660 case GC_PSX_ANALOG:
661
662 if (pad->type == GC_DDR) {
663 for (i = 0; i < 4; i++)
664 input_report_key(dev, gc_psx_ddr_btn[i],
665 ~data[0] & (0x10 << i));
666 } else {
667 for (i = 0; i < 4; i++)
668 input_report_abs(dev, gc_psx_abs[i + 2],
669 data[i + 2]);
670
671 input_report_abs(dev, ABS_X,
672 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
673 input_report_abs(dev, ABS_Y,
674 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
675 }
676
677 for (i = 0; i < 8; i++)
678 input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
679
680 input_report_key(dev, BTN_START, ~data[0] & 0x08);
681 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
682
683 input_sync(dev);
684
685 break;
686
687 case GC_PSX_NORMAL:
688
689 if (pad->type == GC_DDR) {
690 for (i = 0; i < 4; i++)
691 input_report_key(dev, gc_psx_ddr_btn[i],
692 ~data[0] & (0x10 << i));
693 } else {
694 input_report_abs(dev, ABS_X,
695 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
696 input_report_abs(dev, ABS_Y,
697 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
698
699 /*
700 * For some reason if the extra axes are left unset
701 * they drift.
702 * for (i = 0; i < 4; i++)
703 input_report_abs(dev, gc_psx_abs[i + 2], 128);
704 * This needs to be debugged properly,
705 * maybe fuzz processing needs to be done
706 * in input_sync()
707 * --vojtech
708 */
709 }
710
711 for (i = 0; i < 8; i++)
712 input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
713
714 input_report_key(dev, BTN_START, ~data[0] & 0x08);
715 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
716
717 input_sync(dev);
718
719 break;
720
721 default: /* not a pad, ignore */
722 break;
723 }
724 }
725
726 static void gc_psx_process_packet(struct gc *gc)
727 {
728 unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
729 unsigned char id[GC_MAX_DEVICES];
730 struct gc_pad *pad;
731 int i;
732
733 gc_psx_read_packet(gc, data, id);
734
735 for (i = 0; i < GC_MAX_DEVICES; i++) {
736 pad = &gc->pads[i];
737 if (pad->type == GC_PSX || pad->type == GC_DDR)
738 gc_psx_report_one(pad, id[i], data[i]);
739 }
740 }
741
742 /*
743 * gc_timer() initiates reads of console pads data.
744 */
745
746 static void gc_timer(unsigned long private)
747 {
748 struct gc *gc = (void *) private;
749
750 /*
751 * N64 pads - must be read first, any read confuses them for 200 us
752 */
753
754 if (gc->pad_count[GC_N64])
755 gc_n64_process_packet(gc);
756
757 /*
758 * NES and SNES pads or mouse
759 */
760
761 if (gc->pad_count[GC_NES] ||
762 gc->pad_count[GC_SNES] ||
763 gc->pad_count[GC_SNESMOUSE]) {
764 gc_nes_process_packet(gc);
765 }
766
767 /*
768 * Multi and Multi2 joysticks
769 */
770
771 if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
772 gc_multi_process_packet(gc);
773
774 /*
775 * PSX controllers
776 */
777
778 if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
779 gc_psx_process_packet(gc);
780
781 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
782 }
783
784 static int gc_open(struct input_dev *dev)
785 {
786 struct gc *gc = input_get_drvdata(dev);
787 int err;
788
789 err = mutex_lock_interruptible(&gc->mutex);
790 if (err)
791 return err;
792
793 if (!gc->used++) {
794 parport_claim(gc->pd);
795 parport_write_control(gc->pd->port, 0x04);
796 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
797 }
798
799 mutex_unlock(&gc->mutex);
800 return 0;
801 }
802
803 static void gc_close(struct input_dev *dev)
804 {
805 struct gc *gc = input_get_drvdata(dev);
806
807 mutex_lock(&gc->mutex);
808 if (!--gc->used) {
809 del_timer_sync(&gc->timer);
810 parport_write_control(gc->pd->port, 0x00);
811 parport_release(gc->pd);
812 }
813 mutex_unlock(&gc->mutex);
814 }
815
816 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
817 {
818 struct gc_pad *pad = &gc->pads[idx];
819 struct input_dev *input_dev;
820 int i;
821 int err;
822
823 if (pad_type < 1 || pad_type >= GC_MAX) {
824 pr_err("Pad type %d unknown\n", pad_type);
825 return -EINVAL;
826 }
827
828 pad->dev = input_dev = input_allocate_device();
829 if (!input_dev) {
830 pr_err("Not enough memory for input device\n");
831 return -ENOMEM;
832 }
833
834 pad->type = pad_type;
835
836 snprintf(pad->phys, sizeof(pad->phys),
837 "%s/input%d", gc->pd->port->name, idx);
838
839 input_dev->name = gc_names[pad_type];
840 input_dev->phys = pad->phys;
841 input_dev->id.bustype = BUS_PARPORT;
842 input_dev->id.vendor = 0x0001;
843 input_dev->id.product = pad_type;
844 input_dev->id.version = 0x0100;
845
846 input_set_drvdata(input_dev, gc);
847
848 input_dev->open = gc_open;
849 input_dev->close = gc_close;
850
851 if (pad_type != GC_SNESMOUSE) {
852 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
853
854 for (i = 0; i < 2; i++)
855 input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
856 } else
857 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
858
859 gc->pad_count[pad_type]++;
860
861 switch (pad_type) {
862
863 case GC_N64:
864 for (i = 0; i < 10; i++)
865 __set_bit(gc_n64_btn[i], input_dev->keybit);
866
867 for (i = 0; i < 2; i++) {
868 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
869 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
870 }
871
872 err = gc_n64_init_ff(input_dev, idx);
873 if (err) {
874 pr_warning("Failed to initiate rumble for N64 device %d\n", idx);
875 goto err_free_dev;
876 }
877
878 break;
879
880 case GC_SNESMOUSE:
881 __set_bit(BTN_LEFT, input_dev->keybit);
882 __set_bit(BTN_RIGHT, input_dev->keybit);
883 __set_bit(REL_X, input_dev->relbit);
884 __set_bit(REL_Y, input_dev->relbit);
885 break;
886
887 case GC_SNES:
888 for (i = 4; i < 8; i++)
889 __set_bit(gc_snes_btn[i], input_dev->keybit);
890 case GC_NES:
891 for (i = 0; i < 4; i++)
892 __set_bit(gc_snes_btn[i], input_dev->keybit);
893 break;
894
895 case GC_MULTI2:
896 __set_bit(BTN_THUMB, input_dev->keybit);
897 case GC_MULTI:
898 __set_bit(BTN_TRIGGER, input_dev->keybit);
899 break;
900
901 case GC_PSX:
902 for (i = 0; i < 6; i++)
903 input_set_abs_params(input_dev,
904 gc_psx_abs[i], 4, 252, 0, 2);
905 for (i = 0; i < 12; i++)
906 __set_bit(gc_psx_btn[i], input_dev->keybit);
907
908 break;
909
910 case GC_DDR:
911 for (i = 0; i < 4; i++)
912 __set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
913 for (i = 0; i < 12; i++)
914 __set_bit(gc_psx_btn[i], input_dev->keybit);
915
916 break;
917 }
918
919 err = input_register_device(pad->dev);
920 if (err)
921 goto err_free_dev;
922
923 return 0;
924
925 err_free_dev:
926 input_free_device(pad->dev);
927 pad->dev = NULL;
928 return err;
929 }
930
931 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
932 {
933 struct gc *gc;
934 struct parport *pp;
935 struct pardevice *pd;
936 int i;
937 int count = 0;
938 int err;
939
940 pp = parport_find_number(parport);
941 if (!pp) {
942 pr_err("no such parport %d\n", parport);
943 err = -EINVAL;
944 goto err_out;
945 }
946
947 pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
948 if (!pd) {
949 pr_err("parport busy already - lp.o loaded?\n");
950 err = -EBUSY;
951 goto err_put_pp;
952 }
953
954 gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
955 if (!gc) {
956 pr_err("Not enough memory\n");
957 err = -ENOMEM;
958 goto err_unreg_pardev;
959 }
960
961 mutex_init(&gc->mutex);
962 gc->pd = pd;
963 setup_timer(&gc->timer, gc_timer, (long) gc);
964
965 for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
966 if (!pads[i])
967 continue;
968
969 err = gc_setup_pad(gc, i, pads[i]);
970 if (err)
971 goto err_unreg_devs;
972
973 count++;
974 }
975
976 if (count == 0) {
977 pr_err("No valid devices specified\n");
978 err = -EINVAL;
979 goto err_free_gc;
980 }
981
982 parport_put_port(pp);
983 return gc;
984
985 err_unreg_devs:
986 while (--i >= 0)
987 if (gc->pads[i].dev)
988 input_unregister_device(gc->pads[i].dev);
989 err_free_gc:
990 kfree(gc);
991 err_unreg_pardev:
992 parport_unregister_device(pd);
993 err_put_pp:
994 parport_put_port(pp);
995 err_out:
996 return ERR_PTR(err);
997 }
998
999 static void gc_remove(struct gc *gc)
1000 {
1001 int i;
1002
1003 for (i = 0; i < GC_MAX_DEVICES; i++)
1004 if (gc->pads[i].dev)
1005 input_unregister_device(gc->pads[i].dev);
1006 parport_unregister_device(gc->pd);
1007 kfree(gc);
1008 }
1009
1010 static int __init gc_init(void)
1011 {
1012 int i;
1013 int have_dev = 0;
1014 int err = 0;
1015
1016 for (i = 0; i < GC_MAX_PORTS; i++) {
1017 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
1018 continue;
1019
1020 if (gc_cfg[i].nargs < 2) {
1021 pr_err("at least one device must be specified\n");
1022 err = -EINVAL;
1023 break;
1024 }
1025
1026 gc_base[i] = gc_probe(gc_cfg[i].args[0],
1027 gc_cfg[i].args + 1, gc_cfg[i].nargs - 1);
1028 if (IS_ERR(gc_base[i])) {
1029 err = PTR_ERR(gc_base[i]);
1030 break;
1031 }
1032
1033 have_dev = 1;
1034 }
1035
1036 if (err) {
1037 while (--i >= 0)
1038 if (gc_base[i])
1039 gc_remove(gc_base[i]);
1040 return err;
1041 }
1042
1043 return have_dev ? 0 : -ENODEV;
1044 }
1045
1046 static void __exit gc_exit(void)
1047 {
1048 int i;
1049
1050 for (i = 0; i < GC_MAX_PORTS; i++)
1051 if (gc_base[i])
1052 gc_remove(gc_base[i]);
1053 }
1054
1055 module_init(gc_init);
1056 module_exit(gc_exit);