GNU Linux-libre 4.9.328-gnu1
[releases.git] / 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35 #include <linux/kernel.h>
36 #include <linux/delay.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/parport.h>
40 #include <linux/input.h>
41 #include <linux/mutex.h>
42 #include <linux/slab.h>
43
44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
45 MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
46 MODULE_LICENSE("GPL");
47
48 #define GC_MAX_PORTS            3
49 #define GC_MAX_DEVICES          5
50
51 struct gc_config {
52         int args[GC_MAX_DEVICES + 1];
53         unsigned int nargs;
54 };
55
56 static struct gc_config gc_cfg[GC_MAX_PORTS];
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         int parportno;
96         struct mutex mutex;
97 };
98
99 struct gc_subdev {
100         unsigned int idx;
101 };
102
103 static struct gc *gc_base[3];
104
105 static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
106
107 static const char *gc_names[] = {
108         NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
109         "Multisystem 2-button joystick", "N64 controller", "PSX controller",
110         "PSX DDR controller", "SNES mouse"
111 };
112
113 /*
114  * N64 support.
115  */
116
117 static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
118 static const short gc_n64_btn[] = {
119         BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
120         BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
121 };
122
123 #define GC_N64_LENGTH           32              /* N64 bit length, not including stop bit */
124 #define GC_N64_STOP_LENGTH      5               /* Length of encoded stop bit */
125 #define GC_N64_CMD_00           0x11111111UL
126 #define GC_N64_CMD_01           0xd1111111UL
127 #define GC_N64_CMD_03           0xdd111111UL
128 #define GC_N64_CMD_1b           0xdd1dd111UL
129 #define GC_N64_CMD_c0           0x111111ddUL
130 #define GC_N64_CMD_80           0x1111111dUL
131 #define GC_N64_STOP_BIT         0x1d            /* Encoded stop bit */
132 #define GC_N64_REQUEST_DATA     GC_N64_CMD_01   /* the request data command */
133 #define GC_N64_DELAY            133             /* delay between transmit request, and response ready (us) */
134 #define GC_N64_DWS              3               /* delay between write segments (required for sound playback because of ISA DMA) */
135                                                 /* GC_N64_DWS > 24 is known to fail */
136 #define GC_N64_POWER_W          0xe2            /* power during write (transmit request) */
137 #define GC_N64_POWER_R          0xfd            /* power during read */
138 #define GC_N64_OUT              0x1d            /* output bits to the 4 pads */
139                                                 /* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
140                                                 /* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
141                                                 /* than 123 us */
142 #define GC_N64_CLOCK            0x02            /* clock bits for read */
143
144 /*
145  * Used for rumble code.
146  */
147
148 /* Send encoded command */
149 static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
150                                 unsigned char target)
151 {
152         struct parport *port = gc->pd->port;
153         int i;
154
155         for (i = 0; i < GC_N64_LENGTH; i++) {
156                 unsigned char data = (cmd >> i) & 1 ? target : 0;
157                 parport_write_data(port, GC_N64_POWER_W | data);
158                 udelay(GC_N64_DWS);
159         }
160 }
161
162 /* Send stop bit */
163 static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
164 {
165         struct parport *port = gc->pd->port;
166         int i;
167
168         for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
169                 unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
170                 parport_write_data(port, GC_N64_POWER_W | data);
171                 udelay(GC_N64_DWS);
172         }
173 }
174
175 /*
176  * gc_n64_read_packet() reads an N64 packet.
177  * Each pad uses one bit per byte. So all pads connected to this port
178  * are read in parallel.
179  */
180
181 static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
182 {
183         int i;
184         unsigned long flags;
185
186 /*
187  * Request the pad to transmit data
188  */
189
190         local_irq_save(flags);
191         gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
192         gc_n64_send_stop_bit(gc, GC_N64_OUT);
193         local_irq_restore(flags);
194
195 /*
196  * Wait for the pad response to be loaded into the 33-bit register
197  * of the adapter.
198  */
199
200         udelay(GC_N64_DELAY);
201
202 /*
203  * Grab data (ignoring the last bit, which is a stop bit)
204  */
205
206         for (i = 0; i < GC_N64_LENGTH; i++) {
207                 parport_write_data(gc->pd->port, GC_N64_POWER_R);
208                 udelay(2);
209                 data[i] = parport_read_status(gc->pd->port);
210                 parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
211          }
212
213 /*
214  * We must wait 200 ms here for the controller to reinitialize before
215  * the next read request. No worries as long as gc_read is polled less
216  * frequently than this.
217  */
218
219 }
220
221 static void gc_n64_process_packet(struct gc *gc)
222 {
223         unsigned char data[GC_N64_LENGTH];
224         struct input_dev *dev;
225         int i, j, s;
226         signed char x, y;
227
228         gc_n64_read_packet(gc, data);
229
230         for (i = 0; i < GC_MAX_DEVICES; i++) {
231
232                 if (gc->pads[i].type != GC_N64)
233                         continue;
234
235                 dev = gc->pads[i].dev;
236                 s = gc_status_bit[i];
237
238                 if (s & ~(data[8] | data[9])) {
239
240                         x = y = 0;
241
242                         for (j = 0; j < 8; j++) {
243                                 if (data[23 - j] & s)
244                                         x |= 1 << j;
245                                 if (data[31 - j] & s)
246                                         y |= 1 << j;
247                         }
248
249                         input_report_abs(dev, ABS_X,  x);
250                         input_report_abs(dev, ABS_Y, -y);
251
252                         input_report_abs(dev, ABS_HAT0X,
253                                          !(s & data[6]) - !(s & data[7]));
254                         input_report_abs(dev, ABS_HAT0Y,
255                                          !(s & data[4]) - !(s & data[5]));
256
257                         for (j = 0; j < 10; j++)
258                                 input_report_key(dev, gc_n64_btn[j],
259                                                  s & data[gc_n64_bytes[j]]);
260
261                         input_sync(dev);
262                 }
263         }
264 }
265
266 static int gc_n64_play_effect(struct input_dev *dev, void *data,
267                               struct ff_effect *effect)
268 {
269         int i;
270         unsigned long flags;
271         struct gc *gc = input_get_drvdata(dev);
272         struct gc_subdev *sdev = data;
273         unsigned char target = 1 << sdev->idx; /* select desired pin */
274
275         if (effect->type == FF_RUMBLE) {
276                 struct ff_rumble_effect *rumble = &effect->u.rumble;
277                 unsigned int cmd =
278                         rumble->strong_magnitude || rumble->weak_magnitude ?
279                         GC_N64_CMD_01 : GC_N64_CMD_00;
280
281                 local_irq_save(flags);
282
283                 /* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
284                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
285                 gc_n64_send_command(gc, GC_N64_CMD_80, target);
286                 gc_n64_send_command(gc, GC_N64_CMD_01, target);
287                 for (i = 0; i < 32; i++)
288                         gc_n64_send_command(gc, GC_N64_CMD_80, target);
289                 gc_n64_send_stop_bit(gc, target);
290
291                 udelay(GC_N64_DELAY);
292
293                 /* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
294                 gc_n64_send_command(gc, GC_N64_CMD_03, target);
295                 gc_n64_send_command(gc, GC_N64_CMD_c0, target);
296                 gc_n64_send_command(gc, GC_N64_CMD_1b, target);
297                 for (i = 0; i < 32; i++)
298                         gc_n64_send_command(gc, cmd, target);
299                 gc_n64_send_stop_bit(gc, target);
300
301                 local_irq_restore(flags);
302
303         }
304
305         return 0;
306 }
307
308 static int gc_n64_init_ff(struct input_dev *dev, int i)
309 {
310         struct gc_subdev *sdev;
311         int err;
312
313         sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
314         if (!sdev)
315                 return -ENOMEM;
316
317         sdev->idx = i;
318
319         input_set_capability(dev, EV_FF, FF_RUMBLE);
320
321         err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
322         if (err) {
323                 kfree(sdev);
324                 return err;
325         }
326
327         return 0;
328 }
329
330 /*
331  * NES/SNES support.
332  */
333
334 #define GC_NES_DELAY            6       /* Delay between bits - 6us */
335 #define GC_NES_LENGTH           8       /* The NES pads use 8 bits of data */
336 #define GC_SNES_LENGTH          12      /* The SNES true length is 16, but the
337                                            last 4 bits are unused */
338 #define GC_SNESMOUSE_LENGTH     32      /* The SNES mouse uses 32 bits, the first
339                                            16 bits are equivalent to a gamepad */
340
341 #define GC_NES_POWER    0xfc
342 #define GC_NES_CLOCK    0x01
343 #define GC_NES_LATCH    0x02
344
345 static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
346 static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
347 static const short gc_snes_btn[] = {
348         BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
349 };
350
351 /*
352  * gc_nes_read_packet() reads a NES/SNES packet.
353  * Each pad uses one bit per byte. So all pads connected to
354  * this port are read in parallel.
355  */
356
357 static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
358 {
359         int i;
360
361         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
362         udelay(GC_NES_DELAY * 2);
363         parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
364
365         for (i = 0; i < length; i++) {
366                 udelay(GC_NES_DELAY);
367                 parport_write_data(gc->pd->port, GC_NES_POWER);
368                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
369                 udelay(GC_NES_DELAY);
370                 parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
371         }
372 }
373
374 static void gc_nes_process_packet(struct gc *gc)
375 {
376         unsigned char data[GC_SNESMOUSE_LENGTH];
377         struct gc_pad *pad;
378         struct input_dev *dev;
379         int i, j, s, len;
380         char x_rel, y_rel;
381
382         len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
383                         (gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
384
385         gc_nes_read_packet(gc, len, data);
386
387         for (i = 0; i < GC_MAX_DEVICES; i++) {
388
389                 pad = &gc->pads[i];
390                 dev = pad->dev;
391                 s = gc_status_bit[i];
392
393                 switch (pad->type) {
394
395                 case GC_NES:
396
397                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
398                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
399
400                         for (j = 0; j < 4; j++)
401                                 input_report_key(dev, gc_snes_btn[j],
402                                                  s & data[gc_nes_bytes[j]]);
403                         input_sync(dev);
404                         break;
405
406                 case GC_SNES:
407
408                         input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
409                         input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
410
411                         for (j = 0; j < 8; j++)
412                                 input_report_key(dev, gc_snes_btn[j],
413                                                  s & data[gc_snes_bytes[j]]);
414                         input_sync(dev);
415                         break;
416
417                 case GC_SNESMOUSE:
418                         /*
419                          * The 4 unused bits from SNES controllers appear
420                          * to be ID bits so use them to make sure we are
421                          * dealing with a mouse.
422                          * gamepad is connected. This is important since
423                          * my SNES gamepad sends 1's for bits 16-31, which
424                          * cause the mouse pointer to quickly move to the
425                          * upper left corner of the screen.
426                          */
427                         if (!(s & data[12]) && !(s & data[13]) &&
428                             !(s & data[14]) && (s & data[15])) {
429                                 input_report_key(dev, BTN_LEFT, s & data[9]);
430                                 input_report_key(dev, BTN_RIGHT, s & data[8]);
431
432                                 x_rel = y_rel = 0;
433                                 for (j = 0; j < 7; j++) {
434                                         x_rel <<= 1;
435                                         if (data[25 + j] & s)
436                                                 x_rel |= 1;
437
438                                         y_rel <<= 1;
439                                         if (data[17 + j] & s)
440                                                 y_rel |= 1;
441                                 }
442
443                                 if (x_rel) {
444                                         if (data[24] & s)
445                                                 x_rel = -x_rel;
446                                         input_report_rel(dev, REL_X, x_rel);
447                                 }
448
449                                 if (y_rel) {
450                                         if (data[16] & s)
451                                                 y_rel = -y_rel;
452                                         input_report_rel(dev, REL_Y, y_rel);
453                                 }
454
455                                 input_sync(dev);
456                         }
457                         break;
458
459                 default:
460                         break;
461                 }
462         }
463 }
464
465 /*
466  * Multisystem joystick support
467  */
468
469 #define GC_MULTI_LENGTH         5       /* Multi system joystick packet length is 5 */
470 #define GC_MULTI2_LENGTH        6       /* One more bit for one more button */
471
472 /*
473  * gc_multi_read_packet() reads a Multisystem joystick packet.
474  */
475
476 static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
477 {
478         int i;
479
480         for (i = 0; i < length; i++) {
481                 parport_write_data(gc->pd->port, ~(1 << i));
482                 data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
483         }
484 }
485
486 static void gc_multi_process_packet(struct gc *gc)
487 {
488         unsigned char data[GC_MULTI2_LENGTH];
489         int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
490         struct gc_pad *pad;
491         struct input_dev *dev;
492         int i, s;
493
494         gc_multi_read_packet(gc, data_len, data);
495
496         for (i = 0; i < GC_MAX_DEVICES; i++) {
497                 pad = &gc->pads[i];
498                 dev = pad->dev;
499                 s = gc_status_bit[i];
500
501                 switch (pad->type) {
502                 case GC_MULTI2:
503                         input_report_key(dev, BTN_THUMB, s & data[5]);
504                         /* fall through */
505
506                 case GC_MULTI:
507                         input_report_abs(dev, ABS_X,
508                                          !(s & data[2]) - !(s & data[3]));
509                         input_report_abs(dev, ABS_Y,
510                                          !(s & data[0]) - !(s & data[1]));
511                         input_report_key(dev, BTN_TRIGGER, s & data[4]);
512                         input_sync(dev);
513                         break;
514
515                 default:
516                         break;
517                 }
518         }
519 }
520
521 /*
522  * PSX support
523  *
524  * See documentation at:
525  *      http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt 
526  *      http://www.gamesx.com/controldata/psxcont/psxcont.htm
527  *
528  */
529
530 #define GC_PSX_DELAY    25              /* 25 usec */
531 #define GC_PSX_LENGTH   8               /* talk to the controller in bits */
532 #define GC_PSX_BYTES    6               /* the maximum number of bytes to read off the controller */
533
534 #define GC_PSX_MOUSE    1               /* Mouse */
535 #define GC_PSX_NEGCON   2               /* NegCon */
536 #define GC_PSX_NORMAL   4               /* Digital / Analog or Rumble in Digital mode  */
537 #define GC_PSX_ANALOG   5               /* Analog in Analog mode / Rumble in Green mode */
538 #define GC_PSX_RUMBLE   7               /* Rumble in Red mode */
539
540 #define GC_PSX_CLOCK    0x04            /* Pin 4 */
541 #define GC_PSX_COMMAND  0x01            /* Pin 2 */
542 #define GC_PSX_POWER    0xf8            /* Pins 5-9 */
543 #define GC_PSX_SELECT   0x02            /* Pin 3 */
544
545 #define GC_PSX_ID(x)    ((x) >> 4)      /* High nibble is device type */
546 #define GC_PSX_LEN(x)   (((x) & 0xf) << 1)      /* Low nibble is length in bytes/2 */
547
548 static int gc_psx_delay = GC_PSX_DELAY;
549 module_param_named(psx_delay, gc_psx_delay, uint, 0);
550 MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
551
552 static const short gc_psx_abs[] = {
553         ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
554 };
555 static const short gc_psx_btn[] = {
556         BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
557         BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
558 };
559 static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
560
561 /*
562  * gc_psx_command() writes 8bit command and reads 8bit data from
563  * the psx pad.
564  */
565
566 static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
567 {
568         struct parport *port = gc->pd->port;
569         int i, j, cmd, read;
570
571         memset(data, 0, GC_MAX_DEVICES);
572
573         for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
574                 cmd = (b & 1) ? GC_PSX_COMMAND : 0;
575                 parport_write_data(port, cmd | GC_PSX_POWER);
576                 udelay(gc_psx_delay);
577
578                 read = parport_read_status(port) ^ 0x80;
579
580                 for (j = 0; j < GC_MAX_DEVICES; j++) {
581                         struct gc_pad *pad = &gc->pads[j];
582
583                         if (pad->type == GC_PSX || pad->type == GC_DDR)
584                                 data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
585                 }
586
587                 parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
588                 udelay(gc_psx_delay);
589         }
590 }
591
592 /*
593  * gc_psx_read_packet() reads a whole psx packet and returns
594  * device identifier code.
595  */
596
597 static void gc_psx_read_packet(struct gc *gc,
598                                unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
599                                unsigned char id[GC_MAX_DEVICES])
600 {
601         int i, j, max_len = 0;
602         unsigned long flags;
603         unsigned char data2[GC_MAX_DEVICES];
604
605         /* Select pad */
606         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
607         udelay(gc_psx_delay);
608         /* Deselect, begin command */
609         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
610         udelay(gc_psx_delay);
611
612         local_irq_save(flags);
613
614         gc_psx_command(gc, 0x01, data2);        /* Access pad */
615         gc_psx_command(gc, 0x42, id);           /* Get device ids */
616         gc_psx_command(gc, 0, data2);           /* Dump status */
617
618         /* Find the longest pad */
619         for (i = 0; i < GC_MAX_DEVICES; i++) {
620                 struct gc_pad *pad = &gc->pads[i];
621
622                 if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
623                     GC_PSX_LEN(id[i]) > max_len &&
624                     GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
625                         max_len = GC_PSX_LEN(id[i]);
626                 }
627         }
628
629         /* Read in all the data */
630         for (i = 0; i < max_len; i++) {
631                 gc_psx_command(gc, 0, data2);
632                 for (j = 0; j < GC_MAX_DEVICES; j++)
633                         data[j][i] = data2[j];
634         }
635
636         local_irq_restore(flags);
637
638         parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
639
640         /* Set id's to the real value */
641         for (i = 0; i < GC_MAX_DEVICES; i++)
642                 id[i] = GC_PSX_ID(id[i]);
643 }
644
645 static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
646                               unsigned char *data)
647 {
648         struct input_dev *dev = pad->dev;
649         int i;
650
651         switch (psx_type) {
652
653         case GC_PSX_RUMBLE:
654
655                 input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
656                 input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
657
658         case GC_PSX_NEGCON:
659         case GC_PSX_ANALOG:
660
661                 if (pad->type == GC_DDR) {
662                         for (i = 0; i < 4; i++)
663                                 input_report_key(dev, gc_psx_ddr_btn[i],
664                                                  ~data[0] & (0x10 << i));
665                 } else {
666                         for (i = 0; i < 4; i++)
667                                 input_report_abs(dev, gc_psx_abs[i + 2],
668                                                  data[i + 2]);
669
670                         input_report_abs(dev, ABS_X,
671                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
672                         input_report_abs(dev, ABS_Y,
673                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
674                 }
675
676                 for (i = 0; i < 8; i++)
677                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
678
679                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
680                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
681
682                 input_sync(dev);
683
684                 break;
685
686         case GC_PSX_NORMAL:
687
688                 if (pad->type == GC_DDR) {
689                         for (i = 0; i < 4; i++)
690                                 input_report_key(dev, gc_psx_ddr_btn[i],
691                                                  ~data[0] & (0x10 << i));
692                 } else {
693                         input_report_abs(dev, ABS_X,
694                                 !!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
695                         input_report_abs(dev, ABS_Y,
696                                 !!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
697
698                         /*
699                          * For some reason if the extra axes are left unset
700                          * they drift.
701                          * for (i = 0; i < 4; i++)
702                                 input_report_abs(dev, gc_psx_abs[i + 2], 128);
703                          * This needs to be debugged properly,
704                          * maybe fuzz processing needs to be done
705                          * in input_sync()
706                          *                               --vojtech
707                          */
708                 }
709
710                 for (i = 0; i < 8; i++)
711                         input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
712
713                 input_report_key(dev, BTN_START,  ~data[0] & 0x08);
714                 input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
715
716                 input_sync(dev);
717
718                 break;
719
720         default: /* not a pad, ignore */
721                 break;
722         }
723 }
724
725 static void gc_psx_process_packet(struct gc *gc)
726 {
727         unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
728         unsigned char id[GC_MAX_DEVICES];
729         struct gc_pad *pad;
730         int i;
731
732         gc_psx_read_packet(gc, data, id);
733
734         for (i = 0; i < GC_MAX_DEVICES; i++) {
735                 pad = &gc->pads[i];
736                 if (pad->type == GC_PSX || pad->type == GC_DDR)
737                         gc_psx_report_one(pad, id[i], data[i]);
738         }
739 }
740
741 /*
742  * gc_timer() initiates reads of console pads data.
743  */
744
745 static void gc_timer(unsigned long private)
746 {
747         struct gc *gc = (void *) private;
748
749 /*
750  * N64 pads - must be read first, any read confuses them for 200 us
751  */
752
753         if (gc->pad_count[GC_N64])
754                 gc_n64_process_packet(gc);
755
756 /*
757  * NES and SNES pads or mouse
758  */
759
760         if (gc->pad_count[GC_NES] ||
761             gc->pad_count[GC_SNES] ||
762             gc->pad_count[GC_SNESMOUSE]) {
763                 gc_nes_process_packet(gc);
764         }
765
766 /*
767  * Multi and Multi2 joysticks
768  */
769
770         if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
771                 gc_multi_process_packet(gc);
772
773 /*
774  * PSX controllers
775  */
776
777         if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
778                 gc_psx_process_packet(gc);
779
780         mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
781 }
782
783 static int gc_open(struct input_dev *dev)
784 {
785         struct gc *gc = input_get_drvdata(dev);
786         int err;
787
788         err = mutex_lock_interruptible(&gc->mutex);
789         if (err)
790                 return err;
791
792         if (!gc->used++) {
793                 parport_claim(gc->pd);
794                 parport_write_control(gc->pd->port, 0x04);
795                 mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
796         }
797
798         mutex_unlock(&gc->mutex);
799         return 0;
800 }
801
802 static void gc_close(struct input_dev *dev)
803 {
804         struct gc *gc = input_get_drvdata(dev);
805
806         mutex_lock(&gc->mutex);
807         if (!--gc->used) {
808                 del_timer_sync(&gc->timer);
809                 parport_write_control(gc->pd->port, 0x00);
810                 parport_release(gc->pd);
811         }
812         mutex_unlock(&gc->mutex);
813 }
814
815 static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
816 {
817         struct gc_pad *pad = &gc->pads[idx];
818         struct input_dev *input_dev;
819         int i;
820         int err;
821
822         if (pad_type < 1 || pad_type >= GC_MAX) {
823                 pr_err("Pad type %d unknown\n", pad_type);
824                 return -EINVAL;
825         }
826
827         pad->dev = input_dev = input_allocate_device();
828         if (!input_dev) {
829                 pr_err("Not enough memory for input device\n");
830                 return -ENOMEM;
831         }
832
833         pad->type = pad_type;
834
835         snprintf(pad->phys, sizeof(pad->phys),
836                  "%s/input%d", gc->pd->port->name, idx);
837
838         input_dev->name = gc_names[pad_type];
839         input_dev->phys = pad->phys;
840         input_dev->id.bustype = BUS_PARPORT;
841         input_dev->id.vendor = 0x0001;
842         input_dev->id.product = pad_type;
843         input_dev->id.version = 0x0100;
844
845         input_set_drvdata(input_dev, gc);
846
847         input_dev->open = gc_open;
848         input_dev->close = gc_close;
849
850         if (pad_type != GC_SNESMOUSE) {
851                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
852
853                 for (i = 0; i < 2; i++)
854                         input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
855         } else
856                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
857
858         gc->pad_count[pad_type]++;
859
860         switch (pad_type) {
861
862         case GC_N64:
863                 for (i = 0; i < 10; i++)
864                         __set_bit(gc_n64_btn[i], input_dev->keybit);
865
866                 for (i = 0; i < 2; i++) {
867                         input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
868                         input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
869                 }
870
871                 err = gc_n64_init_ff(input_dev, idx);
872                 if (err) {
873                         pr_warning("Failed to initiate rumble for N64 device %d\n", idx);
874                         goto err_free_dev;
875                 }
876
877                 break;
878
879         case GC_SNESMOUSE:
880                 __set_bit(BTN_LEFT, input_dev->keybit);
881                 __set_bit(BTN_RIGHT, input_dev->keybit);
882                 __set_bit(REL_X, input_dev->relbit);
883                 __set_bit(REL_Y, input_dev->relbit);
884                 break;
885
886         case GC_SNES:
887                 for (i = 4; i < 8; i++)
888                         __set_bit(gc_snes_btn[i], input_dev->keybit);
889         case GC_NES:
890                 for (i = 0; i < 4; i++)
891                         __set_bit(gc_snes_btn[i], input_dev->keybit);
892                 break;
893
894         case GC_MULTI2:
895                 __set_bit(BTN_THUMB, input_dev->keybit);
896         case GC_MULTI:
897                 __set_bit(BTN_TRIGGER, input_dev->keybit);
898                 break;
899
900         case GC_PSX:
901                 for (i = 0; i < 6; i++)
902                         input_set_abs_params(input_dev,
903                                              gc_psx_abs[i], 4, 252, 0, 2);
904                 for (i = 0; i < 12; i++)
905                         __set_bit(gc_psx_btn[i], input_dev->keybit);
906
907                 break;
908
909         case GC_DDR:
910                 for (i = 0; i < 4; i++)
911                         __set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
912                 for (i = 0; i < 12; i++)
913                         __set_bit(gc_psx_btn[i], input_dev->keybit);
914
915                 break;
916         }
917
918         err = input_register_device(pad->dev);
919         if (err)
920                 goto err_free_dev;
921
922         return 0;
923
924 err_free_dev:
925         input_free_device(pad->dev);
926         pad->dev = NULL;
927         return err;
928 }
929
930 static void gc_attach(struct parport *pp)
931 {
932         struct gc *gc;
933         struct pardevice *pd;
934         int i, port_idx;
935         int count = 0;
936         int *pads, n_pads;
937         struct pardev_cb gc_parport_cb;
938
939         for (port_idx = 0; port_idx < GC_MAX_PORTS; port_idx++) {
940                 if (gc_cfg[port_idx].nargs == 0 || gc_cfg[port_idx].args[0] < 0)
941                         continue;
942
943                 if (gc_cfg[port_idx].args[0] == pp->number)
944                         break;
945         }
946
947         if (port_idx == GC_MAX_PORTS) {
948                 pr_debug("Not using parport%d.\n", pp->number);
949                 return;
950         }
951         pads = gc_cfg[port_idx].args + 1;
952         n_pads = gc_cfg[port_idx].nargs - 1;
953
954         memset(&gc_parport_cb, 0, sizeof(gc_parport_cb));
955         gc_parport_cb.flags = PARPORT_FLAG_EXCL;
956
957         pd = parport_register_dev_model(pp, "gamecon", &gc_parport_cb,
958                                         port_idx);
959         if (!pd) {
960                 pr_err("parport busy already - lp.o loaded?\n");
961                 return;
962         }
963
964         gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
965         if (!gc) {
966                 pr_err("Not enough memory\n");
967                 goto err_unreg_pardev;
968         }
969
970         mutex_init(&gc->mutex);
971         gc->pd = pd;
972         gc->parportno = pp->number;
973         setup_timer(&gc->timer, gc_timer, (long) gc);
974
975         for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
976                 if (!pads[i])
977                         continue;
978
979                 if (gc_setup_pad(gc, i, pads[i]))
980                         goto err_unreg_devs;
981
982                 count++;
983         }
984
985         if (count == 0) {
986                 pr_err("No valid devices specified\n");
987                 goto err_free_gc;
988         }
989
990         gc_base[port_idx] = gc;
991         return;
992
993  err_unreg_devs:
994         while (--i >= 0)
995                 if (gc->pads[i].dev)
996                         input_unregister_device(gc->pads[i].dev);
997  err_free_gc:
998         kfree(gc);
999  err_unreg_pardev:
1000         parport_unregister_device(pd);
1001 }
1002
1003 static void gc_detach(struct parport *port)
1004 {
1005         int i;
1006         struct gc *gc;
1007
1008         for (i = 0; i < GC_MAX_PORTS; i++) {
1009                 if (gc_base[i] && gc_base[i]->parportno == port->number)
1010                         break;
1011         }
1012
1013         if (i == GC_MAX_PORTS)
1014                 return;
1015
1016         gc = gc_base[i];
1017         gc_base[i] = NULL;
1018
1019         for (i = 0; i < GC_MAX_DEVICES; i++)
1020                 if (gc->pads[i].dev)
1021                         input_unregister_device(gc->pads[i].dev);
1022         parport_unregister_device(gc->pd);
1023         kfree(gc);
1024 }
1025
1026 static struct parport_driver gc_parport_driver = {
1027         .name = "gamecon",
1028         .match_port = gc_attach,
1029         .detach = gc_detach,
1030         .devmodel = true,
1031 };
1032
1033 static int __init gc_init(void)
1034 {
1035         int i;
1036         int have_dev = 0;
1037
1038         for (i = 0; i < GC_MAX_PORTS; i++) {
1039                 if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
1040                         continue;
1041
1042                 if (gc_cfg[i].nargs < 2) {
1043                         pr_err("at least one device must be specified\n");
1044                         return -EINVAL;
1045                 }
1046
1047                 have_dev = 1;
1048         }
1049
1050         if (!have_dev)
1051                 return -ENODEV;
1052
1053         return parport_register_driver(&gc_parport_driver);
1054 }
1055
1056 static void __exit gc_exit(void)
1057 {
1058         parport_unregister_driver(&gc_parport_driver);
1059 }
1060
1061 module_init(gc_init);
1062 module_exit(gc_exit);