Merge branches 'armv7', 'at91', 'misc' and 'omap' into devel
[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 /* see also gs_psx_delay parameter in PSX support section */
64
65 #define GC_SNES         1
66 #define GC_NES          2
67 #define GC_NES4         3
68 #define GC_MULTI        4
69 #define GC_MULTI2       5
70 #define GC_N64          6
71 #define GC_PSX          7
72 #define GC_DDR          8
73 #define GC_SNESMOUSE    9
74
75 #define GC_MAX          9
76
77 #define GC_REFRESH_TIME HZ/100
78
79 struct gc {
80         struct pardevice *pd;
81         struct input_dev *dev[GC_MAX_DEVICES];
82         struct timer_list timer;
83         unsigned char pads[GC_MAX + 1];
84         int used;
85         struct mutex mutex;
86         char phys[GC_MAX_DEVICES][32];
87 };
88
89 static struct gc *gc_base[3];
90
91 static int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
92
93 static char *gc_names[] = { NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
94                                 "Multisystem 2-button joystick", "N64 controller", "PSX controller",
95                                 "PSX DDR controller", "SNES mouse" };
96 /*
97  * N64 support.
98  */
99
100 static unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
101 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 };
102
103 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
104 #define GC_N64_REQUEST_LENGTH   37              /* transmit request sequence is 9 bits long */
105 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
106 #define GC_N64_REQUEST          0x1dd1111111ULL /* the request data command (encoded for 000000011) */
107 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
108                                                 /* GC_N64_DWS > 24 is known to fail */
109 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
110 #define GC_N64_POWER_R          0xfd            /* power during read */
111 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
112                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
113                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
114                                                 /* than 123 us */
115 #define GC_N64_CLOCK            0x02            /* clock bits for read */
116
117 /*
118  * gc_n64_read_packet() reads an N64 packet.
119  * Each pad uses one bit per byte. So all pads connected to this port are read in parallel.
120  */
121
122 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
123 {
124         int i;
125         unsigned long flags;
126
127 /*
128  * Request the pad to transmit data
129  */
130
131         local_irq_save(flags);
132         for (i = 0; i < GC_N64_REQUEST_LENGTH; i++) {
133                 parport_write_data(gc->pd->port, GC_N64_POWER_W | ((GC_N64_REQUEST >> i) & 1 ? GC_N64_OUT : 0));
134                 udelay(GC_N64_DWS);
135         }
136         local_irq_restore(flags);
137
138 /*
139  * Wait for the pad response to be loaded into the 33-bit register of the adapter
140  */
141
142         udelay(GC_N64_DELAY);
143
144 /*
145  * Grab data (ignoring the last bit, which is a stop bit)
146  */
147
148         for (i = 0; i < GC_N64_LENGTH; i++) {
149                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
150                 data[i] = parport_read_status(gc->pd->port);
151                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
152          }
153
154 /*
155  * We must wait 200 ms here for the controller to reinitialize before the next read request.
156  * No worries as long as gc_read is polled less frequently than this.
157  */
158
159 }
160
161 static void gc_n64_process_packet(struct gc *gc)
162 {
163         unsigned char data[GC_N64_LENGTH];
164         signed char axes[2];
165         struct input_dev *dev;
166         int i, j, s;
167
168         gc_n64_read_packet(gc, data);
169
170         for (i = 0; i < GC_MAX_DEVICES; i++) {
171
172                 dev = gc->dev[i];
173                 if (!dev)
174                         continue;
175
176                 s = gc_status_bit[i];
177
178                 if (s & gc->pads[GC_N64] & ~(data[8] | data[9])) {
179
180                         axes[0] = axes[1] = 0;
181
182                         for (j = 0; j < 8; j++) {
183                                 if (data[23 - j] & s)
184                                         axes[0] |= 1 << j;
185                                 if (data[31 - j] & s)
186                                         axes[1] |= 1 << j;
187                         }
188
189                         input_report_abs(dev, ABS_X,  axes[0]);
190                         input_report_abs(dev, ABS_Y, -axes[1]);
191
192                         input_report_abs(dev, ABS_HAT0X, !(s & data[6]) - !(s & data[7]));
193                         input_report_abs(dev, ABS_HAT0Y, !(s & data[4]) - !(s & data[5]));
194
195                         for (j = 0; j < 10; j++)
196                                 input_report_key(dev, gc_n64_btn[j], s & data[gc_n64_bytes[j]]);
197
198                         input_sync(dev);
199                 }
200         }
201 }
202
203 /*
204  * NES/SNES support.
205  */
206
207 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
208 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
209 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
210                                            last 4 bits are unused */
211 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
212                                            16 bits are equivalent to a gamepad */
213
214 #define GC_NES_POWER    0xfc
215 #define GC_NES_CLOCK    0x01
216 #define GC_NES_LATCH    0x02
217
218 static unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
219 static unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
220 static short gc_snes_btn[] = { BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR };
221
222 /*
223  * gc_nes_read_packet() reads a NES/SNES packet.
224  * Each pad uses one bit per byte. So all pads connected to
225  * this port are read in parallel.
226  */
227
228 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
229 {
230         int i;
231
232         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
233         udelay(GC_NES_DELAY * 2);
234         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
235
236         for (i = 0; i < length; i++) {
237                 udelay(GC_NES_DELAY);
238                 parport_write_data(gc->pd->port, GC_NES_POWER);
239                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
240                 udelay(GC_NES_DELAY);
241                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
242         }
243 }
244
245 static void gc_nes_process_packet(struct gc *gc)
246 {
247         unsigned char data[GC_SNESMOUSE_LENGTH];
248         struct input_dev *dev;
249         int i, j, s, len;
250         char x_rel, y_rel;
251
252         len = gc->pads[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
253                         (gc->pads[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
254
255         gc_nes_read_packet(gc, len, data);
256
257         for (i = 0; i < GC_MAX_DEVICES; i++) {
258
259                 dev = gc->dev[i];
260                 if (!dev)
261                         continue;
262
263                 s = gc_status_bit[i];
264
265                 if (s & (gc->pads[GC_NES] | gc->pads[GC_SNES])) {
266                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
267                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
268                 }
269
270                 if (s & gc->pads[GC_NES])
271                         for (j = 0; j < 4; j++)
272                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_nes_bytes[j]]);
273
274                 if (s & gc->pads[GC_SNES])
275                         for (j = 0; j < 8; j++)
276                                 input_report_key(dev, gc_snes_btn[j], s & data[gc_snes_bytes[j]]);
277
278                 if (s & gc->pads[GC_SNESMOUSE]) {
279                         /*
280                          * The 4 unused bits from SNES controllers appear to be ID bits
281                          * so use them to make sure iwe are dealing with a mouse.
282                          * gamepad is connected. This is important since
283                          * my SNES gamepad sends 1's for bits 16-31, which
284                          * cause the mouse pointer to quickly move to the
285                          * upper left corner of the screen.
286                          */
287                         if (!(s & data[12]) && !(s & data[13]) &&
288                             !(s & data[14]) && (s & data[15])) {
289                                 input_report_key(dev, BTN_LEFT, s & data[9]);
290                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
291
292                                 x_rel = y_rel = 0;
293                                 for (j = 0; j < 7; j++) {
294                                         x_rel <<= 1;
295                                         if (data[25 + j] & s)
296                                                 x_rel |= 1;
297
298                                         y_rel <<= 1;
299                                         if (data[17 + j] & s)
300                                                 y_rel |= 1;
301                                 }
302
303                                 if (x_rel) {
304                                         if (data[24] & s)
305                                                 x_rel = -x_rel;
306                                         input_report_rel(dev, REL_X, x_rel);
307                                 }
308
309                                 if (y_rel) {
310                                         if (data[16] & s)
311                                                 y_rel = -y_rel;
312                                         input_report_rel(dev, REL_Y, y_rel);
313                                 }
314                         }
315                 }
316                 input_sync(dev);
317         }
318 }
319
320 /*
321  * Multisystem joystick support
322  */
323
324 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
325 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
326
327 /*
328  * gc_multi_read_packet() reads a Multisystem joystick packet.
329  */
330
331 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
332 {
333         int i;
334
335         for (i = 0; i < length; i++) {
336                 parport_write_data(gc->pd->port, ~(1 << i));
337                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
338         }
339 }
340
341 static void gc_multi_process_packet(struct gc *gc)
342 {
343         unsigned char data[GC_MULTI2_LENGTH];
344         struct input_dev *dev;
345         int i, s;
346
347         gc_multi_read_packet(gc, gc->pads[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH, data);
348
349         for (i = 0; i < GC_MAX_DEVICES; i++) {
350
351                 dev = gc->dev[i];
352                 if (!dev)
353                         continue;
354
355                 s = gc_status_bit[i];
356
357                 if (s & (gc->pads[GC_MULTI] | gc->pads[GC_MULTI2])) {
358                         input_report_abs(dev, ABS_X,  !(s & data[2]) - !(s & data[3]));
359                         input_report_abs(dev, ABS_Y,  !(s & data[0]) - !(s & data[1]));
360                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
361                 }
362
363                 if (s & gc->pads[GC_MULTI2])
364                         input_report_key(dev, BTN_THUMB, s & data[5]);
365
366                 input_sync(dev);
367         }
368 }
369
370 /*
371  * PSX support
372  *
373  * See documentation at:
374  *      http://www.dim.com/~mackys/psxmemcard/ps-eng2.txt
375  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
376  *      ftp://milano.usal.es/pablo/
377  *
378  */
379
380 #define GC_PSX_DELAY    25              /* 25 usec */
381 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
382 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
383
384 #define GC_PSX_MOUSE    1               /* Mouse */
385 #define GC_PSX_NEGCON   2               /* NegCon */
386 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
387 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
388 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
389
390 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
391 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
392 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
393 #define GC_PSX_SELECT   0x02            /* Pin 3 */
394
395 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
396 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
397
398 static int gc_psx_delay = GC_PSX_DELAY;
399 module_param_named(psx_delay, gc_psx_delay, uint, 0);
400 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
401
402 static short gc_psx_abs[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y };
403 static short gc_psx_btn[] = { BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
404                                 BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR };
405 static short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
406
407 /*
408  * gc_psx_command() writes 8bit command and reads 8bit data from
409  * the psx pad.
410  */
411
412 static void gc_psx_command(struct gc *gc, int b, unsigned char data[GC_MAX_DEVICES])
413 {
414         int i, j, cmd, read;
415
416         for (i = 0; i < GC_MAX_DEVICES; i++)
417                 data[i] = 0;
418
419         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
420                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
421                 parport_write_data(gc->pd->port, cmd | GC_PSX_POWER);
422                 udelay(gc_psx_delay);
423                 read = parport_read_status(gc->pd->port) ^ 0x80;
424                 for (j = 0; j < GC_MAX_DEVICES; j++)
425                         data[j] |= (read & gc_status_bit[j] & (gc->pads[GC_PSX] | gc->pads[GC_DDR])) ? (1 << i) : 0;
426                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
427                 udelay(gc_psx_delay);
428         }
429 }
430
431 /*
432  * gc_psx_read_packet() reads a whole psx packet and returns
433  * device identifier code.
434  */
435
436 static void gc_psx_read_packet(struct gc *gc, unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
437                                unsigned char id[GC_MAX_DEVICES])
438 {
439         int i, j, max_len = 0;
440         unsigned long flags;
441         unsigned char data2[GC_MAX_DEVICES];
442
443         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);  /* Select pad */
444         udelay(gc_psx_delay);
445         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);                  /* Deselect, begin command */
446         udelay(gc_psx_delay);
447
448         local_irq_save(flags);
449
450         gc_psx_command(gc, 0x01, data2);                                                /* Access pad */
451         gc_psx_command(gc, 0x42, id);                                                   /* Get device ids */
452         gc_psx_command(gc, 0, data2);                                                   /* Dump status */
453
454         for (i =0; i < GC_MAX_DEVICES; i++)                                                             /* Find the longest pad */
455                 if((gc_status_bit[i] & (gc->pads[GC_PSX] | gc->pads[GC_DDR]))
456                         && (GC_PSX_LEN(id[i]) > max_len)
457                         && (GC_PSX_LEN(id[i]) <= GC_PSX_BYTES))
458                         max_len = GC_PSX_LEN(id[i]);
459
460         for (i = 0; i < max_len; i++) {                                         /* Read in all the data */
461                 gc_psx_command(gc, 0, data2);
462                 for (j = 0; j < GC_MAX_DEVICES; j++)
463                         data[j][i] = data2[j];
464         }
465
466         local_irq_restore(flags);
467
468         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
469
470         for(i = 0; i < GC_MAX_DEVICES; i++)                                                             /* Set id's to the real value */
471                 id[i] = GC_PSX_ID(id[i]);
472 }
473
474 static void gc_psx_process_packet(struct gc *gc)
475 {
476         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
477         unsigned char id[GC_MAX_DEVICES];
478         struct input_dev *dev;
479         int i, j;
480
481         gc_psx_read_packet(gc, data, id);
482
483         for (i = 0; i < GC_MAX_DEVICES; i++) {
484
485                 dev = gc->dev[i];
486                 if (!dev)
487                         continue;
488
489                 switch (id[i]) {
490
491                         case GC_PSX_RUMBLE:
492
493                                 input_report_key(dev, BTN_THUMBL, ~data[i][0] & 0x04);
494                                 input_report_key(dev, BTN_THUMBR, ~data[i][0] & 0x02);
495
496                         case GC_PSX_NEGCON:
497                         case GC_PSX_ANALOG:
498
499                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
500                                         for(j = 0; j < 4; j++)
501                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
502                                 } else {
503                                         for (j = 0; j < 4; j++)
504                                                 input_report_abs(dev, gc_psx_abs[j + 2], data[i][j + 2]);
505
506                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
507                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
508                                 }
509
510                                 for (j = 0; j < 8; j++)
511                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
512
513                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
514                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
515
516                                 input_sync(dev);
517
518                                 break;
519
520                         case GC_PSX_NORMAL:
521                                 if (gc->pads[GC_DDR] & gc_status_bit[i]) {
522                                         for(j = 0; j < 4; j++)
523                                                 input_report_key(dev, gc_psx_ddr_btn[j], ~data[i][0] & (0x10 << j));
524                                 } else {
525                                         input_report_abs(dev, ABS_X, 128 + !(data[i][0] & 0x20) * 127 - !(data[i][0] & 0x80) * 128);
526                                         input_report_abs(dev, ABS_Y, 128 + !(data[i][0] & 0x40) * 127 - !(data[i][0] & 0x10) * 128);
527
528                                         /* for some reason if the extra axes are left unset they drift */
529                                         /* for (j = 0; j < 4; j++)
530                                                 input_report_abs(dev, gc_psx_abs[j + 2], 128);
531                                          * This needs to be debugged properly,
532                                          * maybe fuzz processing needs to be done in input_sync()
533                                          *                               --vojtech
534                                          */
535                                 }
536
537                                 for (j = 0; j < 8; j++)
538                                         input_report_key(dev, gc_psx_btn[j], ~data[i][1] & (1 << j));
539
540                                 input_report_key(dev, BTN_START,  ~data[i][0] & 0x08);
541                                 input_report_key(dev, BTN_SELECT, ~data[i][0] & 0x01);
542
543                                 input_sync(dev);
544
545                                 break;
546
547                         case 0: /* not a pad, ignore */
548                                 break;
549                 }
550         }
551 }
552
553 /*
554  * gc_timer() initiates reads of console pads data.
555  */
556
557 static void gc_timer(unsigned long private)
558 {
559         struct gc *gc = (void *) private;
560
561 /*
562  * N64 pads - must be read first, any read confuses them for 200 us
563  */
564
565         if (gc->pads[GC_N64])
566                 gc_n64_process_packet(gc);
567
568 /*
569  * NES and SNES pads or mouse
570  */
571
572         if (gc->pads[GC_NES] || gc->pads[GC_SNES] || gc->pads[GC_SNESMOUSE])
573                 gc_nes_process_packet(gc);
574
575 /*
576  * Multi and Multi2 joysticks
577  */
578
579         if (gc->pads[GC_MULTI] || gc->pads[GC_MULTI2])
580                 gc_multi_process_packet(gc);
581
582 /*
583  * PSX controllers
584  */
585
586         if (gc->pads[GC_PSX] || gc->pads[GC_DDR])
587                 gc_psx_process_packet(gc);
588
589         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
590 }
591
592 static int gc_open(struct input_dev *dev)
593 {
594         struct gc *gc = input_get_drvdata(dev);
595         int err;
596
597         err = mutex_lock_interruptible(&gc->mutex);
598         if (err)
599                 return err;
600
601         if (!gc->used++) {
602                 parport_claim(gc->pd);
603                 parport_write_control(gc->pd->port, 0x04);
604                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
605         }
606
607         mutex_unlock(&gc->mutex);
608         return 0;
609 }
610
611 static void gc_close(struct input_dev *dev)
612 {
613         struct gc *gc = input_get_drvdata(dev);
614
615         mutex_lock(&gc->mutex);
616         if (!--gc->used) {
617                 del_timer_sync(&gc->timer);
618                 parport_write_control(gc->pd->port, 0x00);
619                 parport_release(gc->pd);
620         }
621         mutex_unlock(&gc->mutex);
622 }
623
624 static int __init gc_setup_pad(struct gc *gc, int idx, int pad_type)
625 {
626         struct input_dev *input_dev;
627         int i;
628
629         if (!pad_type)
630                 return 0;
631
632         if (pad_type < 1 || pad_type > GC_MAX) {
633                 printk(KERN_WARNING "gamecon.c: Pad type %d unknown\n", pad_type);
634                 return -EINVAL;
635         }
636
637         gc->dev[idx] = input_dev = input_allocate_device();
638         if (!input_dev) {
639                 printk(KERN_ERR "gamecon.c: Not enough memory for input device\n");
640                 return -ENOMEM;
641         }
642
643         input_dev->name = gc_names[pad_type];
644         input_dev->phys = gc->phys[idx];
645         input_dev->id.bustype = BUS_PARPORT;
646         input_dev->id.vendor = 0x0001;
647         input_dev->id.product = pad_type;
648         input_dev->id.version = 0x0100;
649
650         input_set_drvdata(input_dev, gc);
651
652         input_dev->open = gc_open;
653         input_dev->close = gc_close;
654
655         if (pad_type != GC_SNESMOUSE) {
656                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
657
658                 for (i = 0; i < 2; i++)
659                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
660         } else
661                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
662
663         gc->pads[0] |= gc_status_bit[idx];
664         gc->pads[pad_type] |= gc_status_bit[idx];
665
666         switch (pad_type) {
667
668                 case GC_N64:
669                         for (i = 0; i < 10; i++)
670                                 set_bit(gc_n64_btn[i], input_dev->keybit);
671
672                         for (i = 0; i < 2; i++) {
673                                 input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
674                                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
675                         }
676
677                         break;
678
679                 case GC_SNESMOUSE:
680                         set_bit(BTN_LEFT, input_dev->keybit);
681                         set_bit(BTN_RIGHT, input_dev->keybit);
682                         set_bit(REL_X, input_dev->relbit);
683                         set_bit(REL_Y, input_dev->relbit);
684                         break;
685
686                 case GC_SNES:
687                         for (i = 4; i < 8; i++)
688                                 set_bit(gc_snes_btn[i], input_dev->keybit);
689                 case GC_NES:
690                         for (i = 0; i < 4; i++)
691                                 set_bit(gc_snes_btn[i], input_dev->keybit);
692                         break;
693
694                 case GC_MULTI2:
695                         set_bit(BTN_THUMB, input_dev->keybit);
696                 case GC_MULTI:
697                         set_bit(BTN_TRIGGER, input_dev->keybit);
698                         break;
699
700                 case GC_PSX:
701                         for (i = 0; i < 6; i++)
702                                 input_set_abs_params(input_dev, gc_psx_abs[i], 4, 252, 0, 2);
703                         for (i = 0; i < 12; i++)
704                                 set_bit(gc_psx_btn[i], input_dev->keybit);
705
706                         break;
707
708                 case GC_DDR:
709                         for (i = 0; i < 4; i++)
710                                 set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
711                         for (i = 0; i < 12; i++)
712                                 set_bit(gc_psx_btn[i], input_dev->keybit);
713
714                         break;
715         }
716
717         return 0;
718 }
719
720 static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
721 {
722         struct gc *gc;
723         struct parport *pp;
724         struct pardevice *pd;
725         int i;
726         int err;
727
728         pp = parport_find_number(parport);
729         if (!pp) {
730                 printk(KERN_ERR "gamecon.c: no such parport\n");
731                 err = -EINVAL;
732                 goto err_out;
733         }
734
735         pd = parport_register_device(pp, "gamecon", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
736         if (!pd) {
737                 printk(KERN_ERR "gamecon.c: parport busy already - lp.o loaded?\n");
738                 err = -EBUSY;
739                 goto err_put_pp;
740         }
741
742         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
743         if (!gc) {
744                 printk(KERN_ERR "gamecon.c: Not enough memory\n");
745                 err = -ENOMEM;
746                 goto err_unreg_pardev;
747         }
748
749         mutex_init(&gc->mutex);
750         gc->pd = pd;
751         init_timer(&gc->timer);
752         gc->timer.data = (long) gc;
753         gc->timer.function = gc_timer;
754
755         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
756                 if (!pads[i])
757                         continue;
758
759                 snprintf(gc->phys[i], sizeof(gc->phys[i]),
760                          "%s/input%d", gc->pd->port->name, i);
761                 err = gc_setup_pad(gc, i, pads[i]);
762                 if (err)
763                         goto err_unreg_devs;
764
765                 err = input_register_device(gc->dev[i]);
766                 if (err)
767                         goto err_free_dev;
768         }
769
770         if (!gc->pads[0]) {
771                 printk(KERN_ERR "gamecon.c: No valid devices specified\n");
772                 err = -EINVAL;
773                 goto err_free_gc;
774         }
775
776         parport_put_port(pp);
777         return gc;
778
779  err_free_dev:
780         input_free_device(gc->dev[i]);
781  err_unreg_devs:
782         while (--i >= 0)
783                 if (gc->dev[i])
784                         input_unregister_device(gc->dev[i]);
785  err_free_gc:
786         kfree(gc);
787  err_unreg_pardev:
788         parport_unregister_device(pd);
789  err_put_pp:
790         parport_put_port(pp);
791  err_out:
792         return ERR_PTR(err);
793 }
794
795 static void gc_remove(struct gc *gc)
796 {
797         int i;
798
799         for (i = 0; i < GC_MAX_DEVICES; i++)
800                 if (gc->dev[i])
801                         input_unregister_device(gc->dev[i]);
802         parport_unregister_device(gc->pd);
803         kfree(gc);
804 }
805
806 static int __init gc_init(void)
807 {
808         int i;
809         int have_dev = 0;
810         int err = 0;
811
812         for (i = 0; i < GC_MAX_PORTS; i++) {
813                 if (gc[i].nargs == 0 || gc[i].args[0] < 0)
814                         continue;
815
816                 if (gc[i].nargs < 2) {
817                         printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
818                         err = -EINVAL;
819                         break;
820                 }
821
822                 gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
823                 if (IS_ERR(gc_base[i])) {
824                         err = PTR_ERR(gc_base[i]);
825                         break;
826                 }
827
828                 have_dev = 1;
829         }
830
831         if (err) {
832                 while (--i >= 0)
833                         if (gc_base[i])
834                                 gc_remove(gc_base[i]);
835                 return err;
836         }
837
838         return have_dev ? 0 : -ENODEV;
839 }
840
841 static void __exit gc_exit(void)
842 {
843         int i;
844
845         for (i = 0; i < GC_MAX_PORTS; i++)
846                 if (gc_base[i])
847                         gc_remove(gc_base[i]);
848 }
849
850 module_init(gc_init);
851 module_exit(gc_exit);