xref: /linux/drivers/input/joystick/gamecon.c (revision 14b42963f64b98ab61fa9723c03d71aa5ef4f862)
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 		snprintf(gc->phys[i], sizeof(gc->phys[i]),
765 			 "%s/input%d", gc->pd->port->name, i);
766 		err = gc_setup_pad(gc, i, pads[i]);
767 		if (err)
768 			goto err_unreg_devs;
769 
770 		err = input_register_device(gc->dev[i]);
771 		if (err)
772 			goto err_free_dev;
773 	}
774 
775 	if (!gc->pads[0]) {
776 		printk(KERN_ERR "gamecon.c: No valid devices specified\n");
777 		err = -EINVAL;
778 		goto err_free_gc;
779 	}
780 
781 	parport_put_port(pp);
782 	return gc;
783 
784  err_free_dev:
785 	input_free_device(gc->dev[i]);
786  err_unreg_devs:
787 	while (--i >= 0)
788 		if (gc->dev[i])
789 			input_unregister_device(gc->dev[i]);
790  err_free_gc:
791 	kfree(gc);
792  err_unreg_pardev:
793 	parport_unregister_device(pd);
794  err_put_pp:
795 	parport_put_port(pp);
796  err_out:
797 	return ERR_PTR(err);
798 }
799 
800 static void gc_remove(struct gc *gc)
801 {
802 	int i;
803 
804 	for (i = 0; i < GC_MAX_DEVICES; i++)
805 		if (gc->dev[i])
806 			input_unregister_device(gc->dev[i]);
807 	parport_unregister_device(gc->pd);
808 	kfree(gc);
809 }
810 
811 static int __init gc_init(void)
812 {
813 	int i;
814 	int have_dev = 0;
815 	int err = 0;
816 
817 	for (i = 0; i < GC_MAX_PORTS; i++) {
818 		if (gc[i].nargs == 0 || gc[i].args[0] < 0)
819 			continue;
820 
821 		if (gc[i].nargs < 2) {
822 			printk(KERN_ERR "gamecon.c: at least one device must be specified\n");
823 			err = -EINVAL;
824 			break;
825 		}
826 
827 		gc_base[i] = gc_probe(gc[i].args[0], gc[i].args + 1, gc[i].nargs - 1);
828 		if (IS_ERR(gc_base[i])) {
829 			err = PTR_ERR(gc_base[i]);
830 			break;
831 		}
832 
833 		have_dev = 1;
834 	}
835 
836 	if (err) {
837 		while (--i >= 0)
838 			if (gc_base[i])
839 				gc_remove(gc_base[i]);
840 		return err;
841 	}
842 
843 	return have_dev ? 0 : -ENODEV;
844 }
845 
846 static void __exit gc_exit(void)
847 {
848 	int i;
849 
850 	for (i = 0; i < GC_MAX_PORTS; i++)
851 		if (gc_base[i])
852 			gc_remove(gc_base[i]);
853 }
854 
855 module_init(gc_init);
856 module_exit(gc_exit);
857