Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
gamecon.c
Go to the documentation of this file.
1 /*
2  * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
3  *
4  * Copyright (c) 1999-2004 Vojtech Pavlik <[email protected]>
5  * Copyright (c) 2004 Peter Nelson <[email protected]>
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 <[email protected]>, 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 <[email protected]>");
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);
Generated on Thu Jan 10 2013 13:39:03 for Linux Kernel by   doxygen 1.8.2