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1da177e4 LT |
1 | /* |
2 | * $Id: grip_mp.c,v 1.9 2002/07/20 19:28:45 bonnland Exp $ | |
3 | * | |
4 | * Driver for the Gravis Grip Multiport, a gamepad "hub" that | |
5 | * connects up to four 9-pin digital gamepads/joysticks. | |
6 | * Driver tested on SMP and UP kernel versions 2.4.18-4 and 2.4.18-5. | |
7 | * | |
8 | * Thanks to Chris Gassib for helpful advice. | |
9 | * | |
10 | * Copyright (c) 2002 Brian Bonnlander, Bill Soudan | |
11 | * Copyright (c) 1998-2000 Vojtech Pavlik | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/gameport.h> | |
19 | #include <linux/input.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/proc_fs.h> | |
22 | ||
23 | #define DRIVER_DESC "Gravis Grip Multiport driver" | |
24 | ||
25 | MODULE_AUTHOR("Brian Bonnlander"); | |
26 | MODULE_DESCRIPTION(DRIVER_DESC); | |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
29 | #ifdef GRIP_DEBUG | |
30 | #define dbg(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" , ## arg) | |
31 | #else | |
32 | #define dbg(format, arg...) do {} while (0) | |
33 | #endif | |
34 | ||
35 | /* | |
36 | * Grip multiport state | |
37 | */ | |
38 | ||
39 | struct grip_mp { | |
40 | struct gameport *gameport; | |
41 | struct input_dev dev[4]; | |
42 | int mode[4]; | |
43 | int registered[4]; | |
44 | int reads; | |
45 | int bads; | |
46 | ||
47 | /* individual gamepad states */ | |
48 | int buttons[4]; | |
49 | int xaxes[4]; | |
50 | int yaxes[4]; | |
51 | int dirty[4]; /* has the state been updated? */ | |
52 | }; | |
53 | ||
54 | /* | |
55 | * Multiport packet interpretation | |
56 | */ | |
57 | ||
58 | #define PACKET_FULL 0x80000000 /* packet is full */ | |
59 | #define PACKET_IO_FAST 0x40000000 /* 3 bits per gameport read */ | |
60 | #define PACKET_IO_SLOW 0x20000000 /* 1 bit per gameport read */ | |
61 | #define PACKET_MP_MORE 0x04000000 /* multiport wants to send more */ | |
62 | #define PACKET_MP_DONE 0x02000000 /* multiport done sending */ | |
63 | ||
64 | /* | |
65 | * Packet status code interpretation | |
66 | */ | |
67 | ||
68 | #define IO_GOT_PACKET 0x0100 /* Got a packet */ | |
69 | #define IO_MODE_FAST 0x0200 /* Used 3 data bits per gameport read */ | |
70 | #define IO_SLOT_CHANGE 0x0800 /* Multiport physical slot status changed */ | |
71 | #define IO_DONE 0x1000 /* Multiport is done sending packets */ | |
72 | #define IO_RETRY 0x4000 /* Try again later to get packet */ | |
73 | #define IO_RESET 0x8000 /* Force multiport to resend all packets */ | |
74 | ||
75 | /* | |
76 | * Gamepad configuration data. Other 9-pin digital joystick devices | |
77 | * may work with the multiport, so this may not be an exhaustive list! | |
78 | * Commodore 64 joystick remains untested. | |
79 | */ | |
80 | ||
81 | #define GRIP_INIT_DELAY 2000 /* 2 ms */ | |
82 | ||
83 | #define GRIP_MODE_NONE 0 | |
84 | #define GRIP_MODE_RESET 1 | |
85 | #define GRIP_MODE_GP 2 | |
86 | #define GRIP_MODE_C64 3 | |
87 | ||
88 | static int grip_btn_gp[] = { BTN_TR, BTN_TL, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, -1 }; | |
89 | static int grip_btn_c64[] = { BTN_JOYSTICK, -1 }; | |
90 | ||
91 | static int grip_abs_gp[] = { ABS_X, ABS_Y, -1 }; | |
92 | static int grip_abs_c64[] = { ABS_X, ABS_Y, -1 }; | |
93 | ||
94 | static int *grip_abs[] = { NULL, NULL, grip_abs_gp, grip_abs_c64 }; | |
95 | static int *grip_btn[] = { NULL, NULL, grip_btn_gp, grip_btn_c64 }; | |
96 | ||
97 | static char *grip_name[] = { NULL, NULL, "Gravis Grip Pad", "Commodore 64 Joystick" }; | |
98 | ||
99 | static const int init_seq[] = { | |
100 | 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
101 | 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, | |
102 | 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
103 | 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1 }; | |
104 | ||
105 | /* Maps multiport directional values to X,Y axis values (each axis encoded in 3 bits) */ | |
106 | ||
107 | static int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5 }; | |
108 | ||
109 | static void register_slot(int i, struct grip_mp *grip); | |
110 | ||
111 | /* | |
112 | * Returns whether an odd or even number of bits are on in pkt. | |
113 | */ | |
114 | ||
115 | static int bit_parity(u32 pkt) | |
116 | { | |
117 | int x = pkt ^ (pkt >> 16); | |
118 | x ^= x >> 8; | |
119 | x ^= x >> 4; | |
120 | x ^= x >> 2; | |
121 | x ^= x >> 1; | |
122 | return x & 1; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Poll gameport; return true if all bits set in 'onbits' are on and | |
127 | * all bits set in 'offbits' are off. | |
128 | */ | |
129 | ||
130 | static inline int poll_until(u8 onbits, u8 offbits, int u_sec, struct gameport* gp, u8 *data) | |
131 | { | |
132 | int i, nloops; | |
133 | ||
134 | nloops = gameport_time(gp, u_sec); | |
135 | for (i = 0; i < nloops; i++) { | |
136 | *data = gameport_read(gp); | |
137 | if ((*data & onbits) == onbits && | |
138 | (~(*data) & offbits) == offbits) | |
139 | return 1; | |
140 | } | |
141 | dbg("gameport timed out after %d microseconds.\n", u_sec); | |
142 | return 0; | |
143 | } | |
144 | ||
145 | /* | |
146 | * Gets a 28-bit packet from the multiport. | |
147 | * | |
148 | * After getting a packet successfully, commands encoded by sendcode may | |
149 | * be sent to the multiport. | |
150 | * | |
151 | * The multiport clock value is reflected in gameport bit B4. | |
152 | * | |
153 | * Returns a packet status code indicating whether packet is valid, the transfer | |
154 | * mode, and any error conditions. | |
155 | * | |
156 | * sendflags: current I/O status | |
157 | * sendcode: data to send to the multiport if sendflags is nonzero | |
158 | */ | |
159 | ||
160 | static int mp_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
161 | { | |
162 | u8 raw_data; /* raw data from gameport */ | |
163 | u8 data_mask; /* packet data bits from raw_data */ | |
164 | u32 pkt; /* packet temporary storage */ | |
165 | int bits_per_read; /* num packet bits per gameport read */ | |
166 | int portvals = 0; /* used for port value sanity check */ | |
167 | int i; | |
168 | ||
169 | /* Gameport bits B0, B4, B5 should first be off, then B4 should come on. */ | |
170 | ||
171 | *packet = 0; | |
172 | raw_data = gameport_read(gameport); | |
173 | if (raw_data & 1) | |
ab0c3443 | 174 | return IO_RETRY; |
1da177e4 LT |
175 | |
176 | for (i = 0; i < 64; i++) { | |
177 | raw_data = gameport_read(gameport); | |
178 | portvals |= 1 << ((raw_data >> 4) & 3); /* Demux B4, B5 */ | |
179 | } | |
180 | ||
181 | if (portvals == 1) { /* B4, B5 off */ | |
182 | raw_data = gameport_read(gameport); | |
183 | portvals = raw_data & 0xf0; | |
184 | ||
185 | if (raw_data & 0x31) | |
186 | return IO_RESET; | |
187 | gameport_trigger(gameport); | |
188 | ||
189 | if (!poll_until(0x10, 0, 308, gameport, &raw_data)) | |
190 | return IO_RESET; | |
191 | } else | |
192 | return IO_RETRY; | |
193 | ||
194 | /* Determine packet transfer mode and prepare for packet construction. */ | |
195 | ||
196 | if (raw_data & 0x20) { /* 3 data bits/read */ | |
197 | portvals |= raw_data >> 4; /* Compare B4-B7 before & after trigger */ | |
198 | ||
199 | if (portvals != 0xb) | |
200 | return 0; | |
201 | data_mask = 7; | |
202 | bits_per_read = 3; | |
203 | pkt = (PACKET_FULL | PACKET_IO_FAST) >> 28; | |
204 | } else { /* 1 data bit/read */ | |
205 | data_mask = 1; | |
206 | bits_per_read = 1; | |
207 | pkt = (PACKET_FULL | PACKET_IO_SLOW) >> 28; | |
208 | } | |
209 | ||
210 | /* Construct a packet. Final data bits must be zero. */ | |
211 | ||
212 | while (1) { | |
213 | if (!poll_until(0, 0x10, 77, gameport, &raw_data)) | |
214 | return IO_RESET; | |
215 | raw_data = (raw_data >> 5) & data_mask; | |
216 | ||
217 | if (pkt & PACKET_FULL) | |
218 | break; | |
219 | pkt = (pkt << bits_per_read) | raw_data; | |
220 | ||
221 | if (!poll_until(0x10, 0, 77, gameport, &raw_data)) | |
222 | return IO_RESET; | |
223 | } | |
224 | ||
225 | if (raw_data) | |
226 | return IO_RESET; | |
227 | ||
228 | /* If 3 bits/read used, drop from 30 bits to 28. */ | |
229 | ||
230 | if (bits_per_read == 3) { | |
231 | pkt = (pkt & 0xffff0000) | ((pkt << 1) & 0xffff); | |
232 | pkt = (pkt >> 2) | 0xf0000000; | |
233 | } | |
234 | ||
235 | if (bit_parity(pkt) == 1) | |
236 | return IO_RESET; | |
237 | ||
238 | /* Acknowledge packet receipt */ | |
239 | ||
240 | if (!poll_until(0x30, 0, 77, gameport, &raw_data)) | |
241 | return IO_RESET; | |
242 | ||
243 | raw_data = gameport_read(gameport); | |
244 | ||
245 | if (raw_data & 1) | |
246 | return IO_RESET; | |
247 | ||
248 | gameport_trigger(gameport); | |
249 | ||
250 | if (!poll_until(0, 0x20, 77, gameport, &raw_data)) | |
251 | return IO_RESET; | |
252 | ||
253 | /* Return if we just wanted the packet or multiport wants to send more */ | |
254 | ||
255 | *packet = pkt; | |
256 | if ((sendflags == 0) || ((sendflags & IO_RETRY) && !(pkt & PACKET_MP_DONE))) | |
257 | return IO_GOT_PACKET; | |
258 | ||
259 | if (pkt & PACKET_MP_MORE) | |
260 | return IO_GOT_PACKET | IO_RETRY; | |
261 | ||
262 | /* Multiport is done sending packets and is ready to receive data */ | |
263 | ||
264 | if (!poll_until(0x20, 0, 77, gameport, &raw_data)) | |
265 | return IO_GOT_PACKET | IO_RESET; | |
266 | ||
267 | raw_data = gameport_read(gameport); | |
268 | if (raw_data & 1) | |
269 | return IO_GOT_PACKET | IO_RESET; | |
270 | ||
271 | /* Trigger gameport based on bits in sendcode */ | |
272 | ||
273 | gameport_trigger(gameport); | |
274 | do { | |
275 | if (!poll_until(0x20, 0x10, 116, gameport, &raw_data)) | |
276 | return IO_GOT_PACKET | IO_RESET; | |
277 | ||
278 | if (!poll_until(0x30, 0, 193, gameport, &raw_data)) | |
279 | return IO_GOT_PACKET | IO_RESET; | |
280 | ||
281 | if (raw_data & 1) | |
282 | return IO_GOT_PACKET | IO_RESET; | |
283 | ||
284 | if (sendcode & 1) | |
285 | gameport_trigger(gameport); | |
286 | ||
287 | sendcode >>= 1; | |
288 | } while (sendcode); | |
289 | ||
290 | return IO_GOT_PACKET | IO_MODE_FAST; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Disables and restores interrupts for mp_io(), which does the actual I/O. | |
295 | */ | |
296 | ||
297 | static int multiport_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
298 | { | |
299 | int status; | |
300 | unsigned long flags; | |
301 | ||
302 | local_irq_save(flags); | |
303 | status = mp_io(gameport, sendflags, sendcode, packet); | |
304 | local_irq_restore(flags); | |
305 | ||
306 | return status; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Puts multiport into digital mode. Multiport LED turns green. | |
311 | * | |
312 | * Returns true if a valid digital packet was received, false otherwise. | |
313 | */ | |
314 | ||
315 | static int dig_mode_start(struct gameport *gameport, u32 *packet) | |
316 | { | |
317 | int i, seq_len = sizeof(init_seq)/sizeof(int); | |
318 | int flags, tries = 0, bads = 0; | |
319 | ||
320 | for (i = 0; i < seq_len; i++) { /* Send magic sequence */ | |
321 | if (init_seq[i]) | |
322 | gameport_trigger(gameport); | |
323 | udelay(GRIP_INIT_DELAY); | |
324 | } | |
325 | ||
326 | for (i = 0; i < 16; i++) /* Wait for multiport to settle */ | |
327 | udelay(GRIP_INIT_DELAY); | |
328 | ||
329 | while (tries < 64 && bads < 8) { /* Reset multiport and try getting a packet */ | |
330 | ||
331 | flags = multiport_io(gameport, IO_RESET, 0x27, packet); | |
332 | ||
333 | if (flags & IO_MODE_FAST) | |
334 | return 1; | |
335 | ||
336 | if (flags & IO_RETRY) | |
337 | tries++; | |
338 | else | |
339 | bads++; | |
340 | } | |
341 | return 0; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Packet structure: B0-B15 => gamepad state | |
346 | * B16-B20 => gamepad device type | |
347 | * B21-B24 => multiport slot index (1-4) | |
348 | * | |
349 | * Known device types: 0x1f (grip pad), 0x0 (no device). Others may exist. | |
350 | * | |
351 | * Returns the packet status. | |
352 | */ | |
353 | ||
354 | static int get_and_decode_packet(struct grip_mp *grip, int flags) | |
355 | { | |
356 | u32 packet; | |
357 | int joytype = 0; | |
358 | int slot = 0; | |
359 | ||
360 | /* Get a packet and check for validity */ | |
361 | ||
362 | flags &= IO_RESET | IO_RETRY; | |
363 | flags = multiport_io(grip->gameport, flags, 0, &packet); | |
364 | grip->reads++; | |
365 | ||
366 | if (packet & PACKET_MP_DONE) | |
367 | flags |= IO_DONE; | |
368 | ||
369 | if (flags && !(flags & IO_GOT_PACKET)) { | |
370 | grip->bads++; | |
371 | return flags; | |
372 | } | |
373 | ||
374 | /* Ignore non-gamepad packets, e.g. multiport hardware version */ | |
375 | ||
376 | slot = ((packet >> 21) & 0xf) - 1; | |
377 | if ((slot < 0) || (slot > 3)) | |
378 | return flags; | |
379 | ||
380 | /* | |
381 | * Handle "reset" packets, which occur at startup, and when gamepads | |
382 | * are removed or plugged in. May contain configuration of a new gamepad. | |
383 | */ | |
384 | ||
385 | joytype = (packet >> 16) & 0x1f; | |
386 | if (!joytype) { | |
387 | ||
388 | if (grip->registered[slot]) { | |
389 | printk(KERN_INFO "grip_mp: removing %s, slot %d\n", | |
390 | grip_name[grip->mode[slot]], slot); | |
391 | input_unregister_device(grip->dev + slot); | |
392 | grip->registered[slot] = 0; | |
393 | } | |
394 | dbg("Reset: grip multiport slot %d\n", slot); | |
395 | grip->mode[slot] = GRIP_MODE_RESET; | |
396 | flags |= IO_SLOT_CHANGE; | |
397 | return flags; | |
398 | } | |
399 | ||
400 | /* Interpret a grip pad packet */ | |
401 | ||
402 | if (joytype == 0x1f) { | |
403 | ||
404 | int dir = (packet >> 8) & 0xf; /* eight way directional value */ | |
405 | grip->buttons[slot] = (~packet) & 0xff; | |
406 | grip->yaxes[slot] = ((axis_map[dir] >> 2) & 3) - 1; | |
407 | grip->xaxes[slot] = (axis_map[dir] & 3) - 1; | |
408 | grip->dirty[slot] = 1; | |
409 | ||
410 | if (grip->mode[slot] == GRIP_MODE_RESET) | |
411 | flags |= IO_SLOT_CHANGE; | |
412 | ||
413 | grip->mode[slot] = GRIP_MODE_GP; | |
414 | ||
415 | if (!grip->registered[slot]) { | |
416 | dbg("New Grip pad in multiport slot %d.\n", slot); | |
417 | register_slot(slot, grip); | |
418 | } | |
419 | return flags; | |
420 | } | |
421 | ||
422 | /* Handle non-grip device codes. For now, just print diagnostics. */ | |
423 | ||
424 | { | |
425 | static int strange_code = 0; | |
426 | if (strange_code != joytype) { | |
427 | printk(KERN_INFO "Possible non-grip pad/joystick detected.\n"); | |
428 | printk(KERN_INFO "Got joy type 0x%x and packet 0x%x.\n", joytype, packet); | |
429 | strange_code = joytype; | |
430 | } | |
431 | } | |
432 | return flags; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Returns true if all multiport slot states appear valid. | |
437 | */ | |
438 | ||
439 | static int slots_valid(struct grip_mp *grip) | |
440 | { | |
441 | int flags, slot, invalid = 0, active = 0; | |
442 | ||
443 | flags = get_and_decode_packet(grip, 0); | |
444 | if (!(flags & IO_GOT_PACKET)) | |
445 | return 0; | |
446 | ||
447 | for (slot = 0; slot < 4; slot++) { | |
448 | if (grip->mode[slot] == GRIP_MODE_RESET) | |
449 | invalid = 1; | |
450 | if (grip->mode[slot] != GRIP_MODE_NONE) | |
451 | active = 1; | |
452 | } | |
453 | ||
454 | /* Return true if no active slot but multiport sent all its data */ | |
455 | if (!active) | |
456 | return (flags & IO_DONE) ? 1 : 0; | |
457 | ||
458 | /* Return false if invalid device code received */ | |
459 | return invalid ? 0 : 1; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Returns whether the multiport was placed into digital mode and | |
464 | * able to communicate its state successfully. | |
465 | */ | |
466 | ||
467 | static int multiport_init(struct grip_mp *grip) | |
468 | { | |
469 | int dig_mode, initialized = 0, tries = 0; | |
470 | u32 packet; | |
471 | ||
472 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
473 | while (!dig_mode && tries < 4) { | |
474 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
475 | tries++; | |
476 | } | |
477 | ||
478 | if (dig_mode) | |
479 | dbg("multiport_init(): digital mode activated.\n"); | |
480 | else { | |
481 | dbg("multiport_init(): unable to activate digital mode.\n"); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* Get packets, store multiport state, and check state's validity */ | |
486 | for (tries = 0; tries < 4096; tries++) { | |
487 | if ( slots_valid(grip) ) { | |
488 | initialized = 1; | |
489 | break; | |
490 | } | |
491 | } | |
492 | dbg("multiport_init(): initialized == %d\n", initialized); | |
493 | return initialized; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Reports joystick state to the linux input layer. | |
498 | */ | |
499 | ||
500 | static void report_slot(struct grip_mp *grip, int slot) | |
501 | { | |
502 | struct input_dev *dev = &(grip->dev[slot]); | |
503 | int i, buttons = grip->buttons[slot]; | |
504 | ||
505 | /* Store button states with linux input driver */ | |
506 | ||
507 | for (i = 0; i < 8; i++) | |
508 | input_report_key(dev, grip_btn_gp[i], (buttons >> i) & 1); | |
509 | ||
510 | /* Store axis states with linux driver */ | |
511 | ||
512 | input_report_abs(dev, ABS_X, grip->xaxes[slot]); | |
513 | input_report_abs(dev, ABS_Y, grip->yaxes[slot]); | |
514 | ||
515 | /* Tell the receiver of the events to process them */ | |
516 | ||
517 | input_sync(dev); | |
518 | ||
519 | grip->dirty[slot] = 0; | |
520 | } | |
521 | ||
522 | /* | |
523 | * Get the multiport state. | |
524 | */ | |
525 | ||
526 | static void grip_poll(struct gameport *gameport) | |
527 | { | |
528 | struct grip_mp *grip = gameport_get_drvdata(gameport); | |
529 | int i, npkts, flags; | |
530 | ||
531 | for (npkts = 0; npkts < 4; npkts++) { | |
532 | flags = IO_RETRY; | |
533 | for (i = 0; i < 32; i++) { | |
534 | flags = get_and_decode_packet(grip, flags); | |
535 | if ((flags & IO_GOT_PACKET) || !(flags & IO_RETRY)) | |
536 | break; | |
537 | } | |
538 | if (flags & IO_DONE) | |
539 | break; | |
540 | } | |
541 | ||
542 | for (i = 0; i < 4; i++) | |
543 | if (grip->dirty[i]) | |
544 | report_slot(grip, i); | |
545 | } | |
546 | ||
547 | /* | |
548 | * Called when a joystick device file is opened | |
549 | */ | |
550 | ||
551 | static int grip_open(struct input_dev *dev) | |
552 | { | |
553 | struct grip_mp *grip = dev->private; | |
554 | ||
555 | gameport_start_polling(grip->gameport); | |
556 | return 0; | |
557 | } | |
558 | ||
559 | /* | |
560 | * Called when a joystick device file is closed | |
561 | */ | |
562 | ||
563 | static void grip_close(struct input_dev *dev) | |
564 | { | |
565 | struct grip_mp *grip = dev->private; | |
566 | ||
567 | gameport_start_polling(grip->gameport); | |
568 | } | |
569 | ||
570 | /* | |
571 | * Tell the linux input layer about a newly plugged-in gamepad. | |
572 | */ | |
573 | ||
574 | static void register_slot(int slot, struct grip_mp *grip) | |
575 | { | |
576 | int j, t; | |
577 | ||
578 | grip->dev[slot].private = grip; | |
579 | grip->dev[slot].open = grip_open; | |
580 | grip->dev[slot].close = grip_close; | |
581 | grip->dev[slot].name = grip_name[grip->mode[slot]]; | |
582 | grip->dev[slot].id.bustype = BUS_GAMEPORT; | |
583 | grip->dev[slot].id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; | |
584 | grip->dev[slot].id.product = 0x0100 + grip->mode[slot]; | |
585 | grip->dev[slot].id.version = 0x0100; | |
586 | grip->dev[slot].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); | |
587 | ||
588 | for (j = 0; (t = grip_abs[grip->mode[slot]][j]) >= 0; j++) | |
589 | input_set_abs_params(&grip->dev[slot], t, -1, 1, 0, 0); | |
590 | ||
591 | for (j = 0; (t = grip_btn[grip->mode[slot]][j]) >= 0; j++) | |
592 | if (t > 0) | |
593 | set_bit(t, grip->dev[slot].keybit); | |
594 | ||
595 | input_register_device(grip->dev + slot); | |
596 | grip->registered[slot] = 1; | |
597 | ||
598 | if (grip->dirty[slot]) /* report initial state, if any */ | |
599 | report_slot(grip, slot); | |
600 | ||
601 | printk(KERN_INFO "grip_mp: added %s, slot %d\n", | |
602 | grip_name[grip->mode[slot]], slot); | |
603 | } | |
604 | ||
605 | static int grip_connect(struct gameport *gameport, struct gameport_driver *drv) | |
606 | { | |
607 | struct grip_mp *grip; | |
608 | int err; | |
609 | ||
a97e148a | 610 | if (!(grip = kzalloc(sizeof(struct grip_mp), GFP_KERNEL))) |
1da177e4 LT |
611 | return -ENOMEM; |
612 | ||
613 | grip->gameport = gameport; | |
614 | ||
615 | gameport_set_drvdata(gameport, grip); | |
616 | ||
617 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
618 | if (err) | |
619 | goto fail1; | |
620 | ||
621 | gameport_set_poll_handler(gameport, grip_poll); | |
622 | gameport_set_poll_interval(gameport, 20); | |
623 | ||
624 | if (!multiport_init(grip)) { | |
625 | err = -ENODEV; | |
626 | goto fail2; | |
627 | } | |
628 | ||
629 | if (!grip->mode[0] && !grip->mode[1] && !grip->mode[2] && !grip->mode[3]) { | |
630 | /* nothing plugged in */ | |
631 | err = -ENODEV; | |
632 | goto fail2; | |
633 | } | |
634 | ||
635 | return 0; | |
636 | ||
637 | fail2: gameport_close(gameport); | |
638 | fail1: gameport_set_drvdata(gameport, NULL); | |
639 | kfree(grip); | |
640 | return err; | |
641 | } | |
642 | ||
643 | static void grip_disconnect(struct gameport *gameport) | |
644 | { | |
645 | struct grip_mp *grip = gameport_get_drvdata(gameport); | |
646 | int i; | |
647 | ||
648 | for (i = 0; i < 4; i++) | |
649 | if (grip->registered[i]) | |
650 | input_unregister_device(grip->dev + i); | |
651 | gameport_close(gameport); | |
652 | gameport_set_drvdata(gameport, NULL); | |
653 | kfree(grip); | |
654 | } | |
655 | ||
656 | static struct gameport_driver grip_drv = { | |
657 | .driver = { | |
658 | .name = "grip_mp", | |
659 | }, | |
660 | .description = DRIVER_DESC, | |
661 | .connect = grip_connect, | |
662 | .disconnect = grip_disconnect, | |
663 | }; | |
664 | ||
665 | static int __init grip_init(void) | |
666 | { | |
667 | gameport_register_driver(&grip_drv); | |
668 | return 0; | |
669 | } | |
670 | ||
671 | static void __exit grip_exit(void) | |
672 | { | |
673 | gameport_unregister_driver(&grip_drv); | |
674 | } | |
675 | ||
676 | module_init(grip_init); | |
677 | module_exit(grip_exit); |