Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / drivers / input / joystick / gamecon.c
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 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/init.h>
38 #include <linux/parport.h>
39 #include <linux/input.h>
40 #include <linux/mutex.h>
41
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
44 MODULE_LICENSE("GPL");
45
46 #define GC_MAX_PORTS            3
47 #define GC_MAX_DEVICES          5
48
49 struct gc_config {
50         int args[GC_MAX_DEVICES + 1];
51         int nargs;
52 };
53
54 static struct gc_config gc[GC_MAX_PORTS] __initdata;
55
56 module_param_array_named(map, gc[0].args, int, &gc[0].nargs, 0);
57 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
58 module_param_array_named(map2, gc[1].args, int, &gc[1].nargs, 0);
59 MODULE_PARM_DESC(map2, "Describes second set of devices");
60 module_param_array_named(map3, gc[2].args, int, &gc[2].nargs, 0);
61 MODULE_PARM_DESC(map3, "Describes third set of devices");
62
63 __obsolete_setup("gc=");
64 __obsolete_setup("gc_2=");
65 __obsolete_setup("gc_3=");
66
67 /* see also gs_psx_delay parameter in PSX support section */
68
69 #define GC_SNES         1
70 #define GC_NES          2
71 #define GC_NES4         3
72 #define GC_MULTI        4
73 #define GC_MULTI2       5
74 #define GC_N64          6
75 #define GC_PSX          7
76 #define GC_DDR          8
77 #define GC_SNESMOUSE    9
78
79 #define GC_MAX          9
80
81 #define GC_REFRESH_TIME HZ/100
82
83 struct gc {
84         struct pardevice *pd;
85         struct input_dev *dev[GC_MAX_DEVICES];
86         struct timer_list timer;
87         unsigned char pads[GC_MAX + 1];
88         int used;
89         struct mutex mutex;
90         char phys[GC_MAX_DEVICES][32];
91 };
92
93 static struct gc *gc_base[3];
94
95 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
96
97 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
98                                 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
99                                 "PSX DDR controller", "SNES mouse" };
100 /*
101  * N64 support.
102  */
103
104 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
105 static short gc_n64_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START };
106
107 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
108 #define GC_N64_REQUEST_LENGTH   37              /* transmit request sequence is 9 bits long */
109 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
110 #define GC_N64_REQUEST          0x1dd1111111ULL /* the request data command (encoded for 000000011) */
111 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
112                                                 /* GC_N64_DWS > 24 is known to fail */
113 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
114 #define GC_N64_POWER_R          0xfd            /* power during read */
115 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
116                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
117                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
118                                                 /* than 123 us */
119 #define GC_N64_CLOCK            0x02            /* clock bits for read */
120
121 /*
122  * gc_n64_read_packet() reads an N64 packet.
123  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
124  */
125
126 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
127 {
128         int i;
129         unsigned long flags;
130
131 /*
132  * Request the pad to transmit data
133  */
134
135         local_irq_save(flags);
136         for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
137                 parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
138                 udelay(GC_N64_DWS);
139         }
140         local_irq_restore(flags);
141
142 /*
143  * Wait for the pad response to be loaded into the 33-bit register of the adapter
144  */
145
146         udelay(GC_N64_DELAY);
147
148 /*
149  * Grab data (ignoring the last bit, which is a stop bit)
150  */
151
152         for (i = 0; i < GC_N64_LENGTH; i++) {
153                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
154                 data[i] = parport_read_status(gc->pd->port);
155                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
156          }
157
158 /*
159  * We must wait 200 ms here for the controller to reinitialize before the next read request.
160  * No worries as long as gc_read is polled less frequently than this.
161  */
162
163 }
164
165 static void gc_n64_process_packet(struct gc *gc)
166 {
167         unsigned char data[GC_N64_LENGTH];
168         signed char axes[2];
169         struct input_dev *dev;
170         int i, j, s;
171
172         gc_n64_read_packet(gc, data);
173
174         for (i = 0; i < GC_MAX_DEVICES; i++) {
175
176                 dev = gc->dev[i];
177                 if (!dev)
178                         continue;
179
180                 s = gc_status_bit[i];
181
182                 if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
183
184                         axes[0] = axes[1] = 0;
185
186                         for (j = 0; j < 8; j++) {
187                                 if (data[23 - j] & s)
188                                         axes[0] |= 1 << j;
189                                 if (data[31 - j] & s)
190                                         axes[1] |= 1 << j;
191                         }
192
193                         input_report_abs(dev, ABS_X,  axes[0]);
194                         input_report_abs(dev, ABS_Y, -axes[1]);
195
196                         input_report_abs(dev, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
197                         input_report_abs(dev, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
198
199                         for (j = 0; j < 10; j++)
200                                 input_report_key(dev, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
201
202                         input_sync(dev);
203                 }
204         }
205 }
206
207 /*
208  * NES/SNES support.
209  */
210
211 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
212 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
213 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
214                                            last 4 bits are unused */
215 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
216                                            16 bits are equivalent to a gamepad */
217
218 #define GC_NES_POWER    0xfc
219 #define GC_NES_CLOCK    0x01
220 #define GC_NES_LATCH    0x02
221
222 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
223 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
224 static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };
225
226 /*
227  * gc_nes_read_packet() reads a NES/SNES packet.
228  * Each pad uses one bit per byte. So all pads connected to
229  * this port are read in parallel.
230  */
231
232 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
233 {
234         int i;
235
236         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
237         udelay(GC_NES_DELAY * 2);
238         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
239
240         for (i = 0; i < length; i++) {
241                 udelay(GC_NES_DELAY);
242                 parport_write_data(gc->pd->port, GC_NES_POWER);
243                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
244                 udelay(GC_NES_DELAY);
245                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
246         }
247 }
248
249 static void gc_nes_process_packet(struct gc *gc)
250 {
251         unsigned char data[GC_SNESMOUSE_LENGTH];
252         struct input_dev *dev;
253         int i, j, s, len;
254         char x_rel, y_rel;
255
256         len = gc->pads[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
257                         (gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
258
259         gc_nes_read_packet(gc, len, data);
260
261         for (i = 0; i < GC_MAX_DEVICES; i++) {
262
263                 dev = gc->dev[i];
264                 if (!dev)
265                         continue;
266
267                 s = gc_status_bit[i];
268
269                 if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
270                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
271                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
272                 }
273
274                 if (s & gc->pads[GC_NES])
275                         for (j = 0; j < 4; j++)
276                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
277
278                 if (s & gc->pads[GC_SNES])
279                         for (j = 0; j < 8; j++)
280                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
281
282                 if (s & gc->pads[GC_SNESMOUSE]) {
283                         /*
284                          * The 4 unused bits from SNES controllers appear to be ID bits
285                          * so use them to make sure iwe are dealing with a mouse.
286                          * gamepad is connected. This is important since
287                          * my SNES gamepad sends 1's for bits 16-31, which
288                          * cause the mouse pointer to quickly move to the
289                          * upper left corner of the screen.
290                          */
291                         if (!(s & data[12]) && !(s & data[13]) &&
292                             !(s & data[14]) && (s & data[15])) {
293                                 input_report_key(dev, BTN_LEFT, s & data[9]);
294                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
295
296                                 x_rel = y_rel = 0;
297                                 for (j = 0; j < 7; j++) {
298                                         x_rel <<= 1;
299                                         if (data[25 + j] & s)
300                                                 x_rel |= 1;
301
302                                         y_rel <<= 1;
303                                         if (data[17 + j] & s)
304                                                 y_rel |= 1;
305                                 }
306
307                                 if (x_rel) {
308                                         if (data[24] & s)
309                                                 x_rel = -x_rel;
310                                         input_report_rel(dev, REL_X, x_rel);
311                                 }
312
313                                 if (y_rel) {
314                                         if (data[16] & s)
315                                                 y_rel = -y_rel;
316                                         input_report_rel(dev, REL_Y, y_rel);
317                                 }
318                         }
319                 }
320                 input_sync(dev);
321         }
322 }
323
324 /*
325  * Multisystem joystick support
326  */
327
328 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
329 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
330
331 /*
332  * gc_multi_read_packet() reads a Multisystem joystick packet.
333  */
334
335 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
336 {
337         int i;
338
339         for (i = 0; i < length; i++) {
340                 parport_write_data(gc->pd->port, ~(1 << i));
341                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
342         }
343 }
344
345 static void gc_multi_process_packet(struct gc *gc)
346 {
347         unsigned char data[GC_MULTI2_LENGTH];
348         struct input_dev *dev;
349         int i, s;
350
351         gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
352
353         for (i = 0; i < GC_MAX_DEVICES; i++) {
354
355                 dev = gc->dev[i];
356                 if (!dev)
357                         continue;
358
359                 s = gc_status_bit[i];
360
361                 if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
362                         input_report_abs(dev, ABS_X,  !(s & data[2]) - !(s & data[3]));
363                         input_report_abs(dev, ABS_Y,  !(s & data[0]) - !(s & data[1]));
364                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
365                 }
366
367                 if (s & gc->pads[GC_MULTI2])
368                         input_report_key(dev, BTN_THUMB, s & data[5]);
369
370                 input_sync(dev);
371         }
372 }
373
374 /*
375  * PSX support
376  *
377  * See documentation at:
378  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
379  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
380  *      ftp://milano.usal.es/pablo/
381  *
382  */
383
384 #define GC_PSX_DELAY    25              /* 25 usec */
385 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
386 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
387
388 #define GC_PSX_MOUSE    1               /* Mouse */
389 #define GC_PSX_NEGCON   2               /* NegCon */
390 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
391 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
392 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
393
394 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
395 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
396 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
397 #define GC_PSX_SELECT   0x02            /* Pin 3 */
398
399 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
400 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
401
402 static int gc_psx_delay = GC_PSX_DELAY;
403 module_param_named(psx_delay, gc_psx_delay, uint, 0);
404 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
405
406 __obsolete_setup("gc_psx_delay=");
407
408 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
409 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
410                                 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
411 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
412
413 /*
414  * gc_psx_command() writes 8bit command and reads 8bit data from
415  * the psx pad.
416  */
417
418 static void gc_psx_command(struct gc *gc, int b, unsigned char data[GC_MAX_DEVICES])
419 {
420         int i, j, cmd, read;
421
422         for (i = 0; i < GC_MAX_DEVICES; i++)
423                 data[i] = 0;
424
425         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
426                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
427                 parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
428                 udelay(gc_psx_delay);
429                 read = parport_read_status(gc->pd->port) ^ 0x80;
430                 for (j = 0; j < GC_MAX_DEVICES; j++)
431                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
432                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
433                 udelay(gc_psx_delay);
434         }
435 }
436
437 /*
438  * gc_psx_read_packet() reads a whole psx packet and returns
439  * device identifier code.
440  */
441
442 static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
443                                unsigned char id[GC_MAX_DEVICES])
444 {
445         int i, j, max_len = 0;
446         unsigned long flags;
447         unsigned char data2[GC_MAX_DEVICES];
448
449         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);  /* Select pad */
450         udelay(gc_psx_delay);
451         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);                  /* Deselect, begin command */
452         udelay(gc_psx_delay);
453
454         local_irq_save(flags);
455
456         gc_psx_command(gc, 0x01, data2);                                                /* Access pad */
457         gc_psx_command(gc, 0x42, id);                                                   /* Get device ids */
458         gc_psx_command(gc, 0, data2);                                                   /* Dump status */
459
460         for (i =0; i < GC_MAX_DEVICES; i++)                                                             /* Find the longest pad */
461                 if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
462                         && (GC_PSX_LEN(id[i]) > max_len)
463                         && (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
464                         max_len = GC_PSX_LEN(id[i]);
465
466         for (i = 0; i < max_len; i++) {                                         /* Read in all the data */
467                 gc_psx_command(gc, 0, data2);
468                 for (j = 0; j < GC_MAX_DEVICES; j++)
469                         data[j][i] = data2[j];
470         }
471
472         local_irq_restore(flags);
473
474         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
475
476         for(i = 0; i < GC_MAX_DEVICES; i++)                                                             /* Set id's to the real value */
477                 id[i] = GC_PSX_ID(id[i]);
478 }
479
480 static void gc_psx_process_packet(struct gc *gc)
481 {
482         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
483         unsigned char id[GC_MAX_DEVICES];
484         struct input_dev *dev;
485         int i, j;
486
487         gc_psx_read_packet(gc, data, id);
488
489         for (i = 0; i < GC_MAX_DEVICES; i++) {
490
491                 dev = gc->dev[i];
492                 if (!dev)
493                         continue;
494
495                 switch (id[i]) {
496
497                         case GC_PSX_RUMBLE:
498
499                                 input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
500                                 input_report_key(dev, BTN_THUMBR, ~data[i][0] & 0x02);
501
502                         case GC_PSX_NEGCON:
503                         case GC_PSX_ANALOG:
504
505                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
506                                         for(j = 0; j < 4; j++)
507                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
508                                 } else {
509                                         for (j = 0; j < 4; j++)
510                                                 input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);
511
512                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
513                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
514                                 }
515
516                                 for (j = 0; j < 8; j++)
517                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
518
519                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
520                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
521
522                                 input_sync(dev);
523
524                                 break;
525
526                         case GC_PSX_NORMAL:
527                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
528                                         for(j = 0; j < 4; j++)
529                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
530                                 } else {
531                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
532                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
533
534                                         /* for some reason if the extra axes are left unset they drift */
535                                         /* for (j = 0; j < 4; j++)
536                                                 input_report_abs(dev, gc_psx_abs[j + 2], 128);
537                                          * This needs to be debugged properly,
538                                          * maybe fuzz processing needs to be done in input_sync()
539                                          *                               --vojtech
540                                          */
541                                 }
542
543                                 for (j = 0; j < 8; j++)
544                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
545
546                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
547                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
548
549                                 input_sync(dev);
550
551                                 break;
552
553                         case 0: /* not a pad, ignore */
554                                 break;
555                 }
556         }
557 }
558
559 /*
560  * gc_timer() initiates reads of console pads data.
561  */
562
563 static void gc_timer(unsigned long private)
564 {
565         struct gc *gc = (void *) private;
566
567 /*
568  * N64 pads - must be read first, any read confuses them for 200 us
569  */
570
571         if (gc->pads[GC_N64])
572                 gc_n64_process_packet(gc);
573
574 /*
575  * NES and SNES pads or mouse
576  */
577
578         if (gc->pads[GC_NES] || gc->pads[GC_SNES] || gc->pads[GC_SNESMOUSE])
579                 gc_nes_process_packet(gc);
580
581 /*
582  * Multi and Multi2 joysticks
583  */
584
585         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
586                 gc_multi_process_packet(gc);
587
588 /*
589  * PSX controllers
590  */
591
592         if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
593                 gc_psx_process_packet(gc);
594
595         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
596 }
597
598 static int gc_open(struct input_dev *dev)
599 {
600         struct gc *gc = dev->private;
601         int err;
602
603         err = mutex_lock_interruptible(&gc->mutex);
604         if (err)
605                 return err;
606
607         if (!gc->used++) {
608                 parport_claim(gc->pd);
609                 parport_write_control(gc->pd->port, 0x04);
610                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
611         }
612
613         mutex_unlock(&gc->mutex);
614         return 0;
615 }
616
617 static void gc_close(struct input_dev *dev)
618 {
619         struct gc *gc = dev->private;
620
621         mutex_lock(&gc->mutex);
622         if (!--gc->used) {
623                 del_timer_sync(&gc->timer);
624                 parport_write_control(gc->pd->port, 0x00);
625                 parport_release(gc->pd);
626         }
627         mutex_unlock(&gc->mutex);
628 }
629
630 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
631 {
632         struct input_dev *input_dev;
633         int i;
634
635         if (!pad_type)
636                 return 0;
637
638         if (pad_type < 1 || pad_type > GC_MAX) {
639                 printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
640                 return -EINVAL;
641         }
642
643         gc->dev[idx] = input_dev = input_allocate_device();
644         if (!input_dev) {
645                 printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
646                 return -ENOMEM;
647         }
648
649         input_dev->name = gc_names[pad_type];
650         input_dev->phys = gc->phys[idx];
651         input_dev->id.bustype = BUS_PARPORT;
652         input_dev->id.vendor = 0x0001;
653         input_dev->id.product = pad_type;
654         input_dev->id.version = 0x0100;
655         input_dev->private = gc;
656
657         input_dev->open = gc_open;
658         input_dev->close = gc_close;
659
660         if (pad_type != GC_SNESMOUSE) {
661                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
662
663                 for (i = 0; i < 2; i++)
664                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
665         } else
666                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
667
668         gc->pads[0] |= gc_status_bit[idx];
669         gc->pads[pad_type] |= gc_status_bit[idx];
670
671         switch (pad_type) {
672
673                 case GC_N64:
674                         for (i = 0; i < 10; i++)
675                                 set_bit(gc_n64_btn[i], input_dev->keybit);
676
677                         for (i = 0; i < 2; i++) {
678                                 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
679                                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
680                         }
681
682                         break;
683
684                 case GC_SNESMOUSE:
685                         set_bit(BTN_LEFT, input_dev->keybit);
686                         set_bit(BTN_RIGHT, input_dev->keybit);
687                         set_bit(REL_X, input_dev->relbit);
688                         set_bit(REL_Y, input_dev->relbit);
689                         break;
690
691                 case GC_SNES:
692                         for (i = 4; i < 8; i++)
693                                 set_bit(gc_snes_btn[i], input_dev->keybit);
694                 case GC_NES:
695                         for (i = 0; i < 4; i++)
696                                 set_bit(gc_snes_btn[i], input_dev->keybit);
697                         break;
698
699                 case GC_MULTI2:
700                         set_bit(BTN_THUMB, input_dev->keybit);
701                 case GC_MULTI:
702                         set_bit(BTN_TRIGGER, input_dev->keybit);
703                         break;
704
705                 case GC_PSX:
706                         for (i = 0; i < 6; i++)
707                                 input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
708                         for (i = 0; i < 12; i++)
709                                 set_bit(gc_psx_btn[i], input_dev->keybit);
710
711                         break;
712
713                 case GC_DDR:
714                         for (i = 0; i < 4; i++)
715                                 set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
716                         for (i = 0; i < 12; i++)
717                                 set_bit(gc_psx_btn[i], input_dev->keybit);
718
719                         break;
720         }
721
722         return 0;
723 }
724
725 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
726 {
727         struct gc *gc;
728         struct parport *pp;
729         struct pardevice *pd;
730         int i;
731         int err;
732
733         pp = parport_find_number(parport);
734         if (!pp) {
735                 printk(KERN_ERR "gamecon.c: no such parport\n");
736                 err = -EINVAL;
737                 goto err_out;
738         }
739
740         pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
741         if (!pd) {
742                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
743                 err = -EBUSY;
744                 goto err_put_pp;
745         }
746
747         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
748         if (!gc) {
749                 printk(KERN_ERR "gamecon.c: Not enough memory\n");
750                 err = -ENOMEM;
751                 goto err_unreg_pardev;
752         }
753
754         mutex_init(&gc->mutex);
755         gc->pd = pd;
756         init_timer(&gc->timer);
757         gc->timer.data = (long) gc;
758         gc->timer.function = gc_timer;
759
760         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
761                 if (!pads[i])
762                         continue;
763
764                 sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
765                 err = gc_setup_pad(gc, i, pads[i]);
766                 if (err)
767                         goto err_unreg_devs;
768
769                 err = input_register_device(gc->dev[i]);
770                 if (err)
771                         goto err_free_dev;
772         }
773
774         if (!gc->pads[0]) {
775                 printk(KERN_ERR "gamecon.c: No valid devices specified\n");
776                 err = -EINVAL;
777                 goto err_free_gc;
778         }
779
780         parport_put_port(pp);
781         return gc;
782
783  err_free_dev:
784         input_free_device(gc->dev[i]);
785  err_unreg_devs:
786         while (--i >= 0)
787                 if (gc->dev[i])
788                         input_unregister_device(gc->dev[i]);
789  err_free_gc:
790         kfree(gc);
791  err_unreg_pardev:
792         parport_unregister_device(pd);
793  err_put_pp:
794         parport_put_port(pp);
795  err_out:
796         return ERR_PTR(err);
797 }
798
799 static void gc_remove(struct gc *gc)
800 {
801         int i;
802
803         for (i = 0; i < GC_MAX_DEVICES; i++)
804                 if (gc->dev[i])
805                         input_unregister_device(gc->dev[i]);
806         parport_unregister_device(gc->pd);
807         kfree(gc);
808 }
809
810 static int __init gc_init(void)
811 {
812         int i;
813         int have_dev = 0;
814         int err = 0;
815
816         for (i = 0; i < GC_MAX_PORTS; i++) {
817                 if (gc[i].nargs == 0 || gc[i].args[0] < 0)
818                         continue;
819
820                 if (gc[i].nargs < 2) {
821                         printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
822                         err = -EINVAL;
823                         break;
824                 }
825
826                 gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
827                 if (IS_ERR(gc_base[i])) {
828                         err = PTR_ERR(gc_base[i]);
829                         break;
830                 }
831
832                 have_dev = 1;
833         }
834
835         if (err) {
836                 while (--i >= 0)
837                         if (gc_base[i])
838                                 gc_remove(gc_base[i]);
839                 return err;
840         }
841
842         return have_dev ? 0 : -ENODEV;
843 }
844
845 static void __exit gc_exit(void)
846 {
847         int i;
848
849         for (i = 0; i < GC_MAX_PORTS; i++)
850                 if (gc_base[i])
851                         gc_remove(gc_base[i]);
852 }
853
854 module_init(gc_init);
855 module_exit(gc_exit);