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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 | ||
17dd3f0f | 35 | #define GRIP_MAX_PORTS 4 |
1da177e4 LT |
36 | /* |
37 | * Grip multiport state | |
38 | */ | |
39 | ||
17dd3f0f DT |
40 | struct grip_port { |
41 | struct input_dev *dev; | |
42 | int mode; | |
43 | int registered; | |
44 | ||
45 | /* individual gamepad states */ | |
46 | int buttons; | |
47 | int xaxes; | |
48 | int yaxes; | |
49 | int dirty; /* has the state been updated? */ | |
50 | }; | |
51 | ||
1da177e4 LT |
52 | struct grip_mp { |
53 | struct gameport *gameport; | |
17dd3f0f DT |
54 | struct grip_port *port[GRIP_MAX_PORTS]; |
55 | // struct input_dev *dev[4]; | |
56 | // int mode[4]; | |
57 | // int registered[4]; | |
1da177e4 LT |
58 | int reads; |
59 | int bads; | |
60 | ||
61 | /* individual gamepad states */ | |
17dd3f0f DT |
62 | // int buttons[4]; |
63 | // int xaxes[4]; | |
64 | // int yaxes[4]; | |
65 | // int dirty[4]; /* has the state been updated? */ | |
1da177e4 LT |
66 | }; |
67 | ||
68 | /* | |
69 | * Multiport packet interpretation | |
70 | */ | |
71 | ||
72 | #define PACKET_FULL 0x80000000 /* packet is full */ | |
73 | #define PACKET_IO_FAST 0x40000000 /* 3 bits per gameport read */ | |
74 | #define PACKET_IO_SLOW 0x20000000 /* 1 bit per gameport read */ | |
75 | #define PACKET_MP_MORE 0x04000000 /* multiport wants to send more */ | |
76 | #define PACKET_MP_DONE 0x02000000 /* multiport done sending */ | |
77 | ||
78 | /* | |
79 | * Packet status code interpretation | |
80 | */ | |
81 | ||
82 | #define IO_GOT_PACKET 0x0100 /* Got a packet */ | |
83 | #define IO_MODE_FAST 0x0200 /* Used 3 data bits per gameport read */ | |
84 | #define IO_SLOT_CHANGE 0x0800 /* Multiport physical slot status changed */ | |
85 | #define IO_DONE 0x1000 /* Multiport is done sending packets */ | |
86 | #define IO_RETRY 0x4000 /* Try again later to get packet */ | |
87 | #define IO_RESET 0x8000 /* Force multiport to resend all packets */ | |
88 | ||
89 | /* | |
90 | * Gamepad configuration data. Other 9-pin digital joystick devices | |
91 | * may work with the multiport, so this may not be an exhaustive list! | |
92 | * Commodore 64 joystick remains untested. | |
93 | */ | |
94 | ||
95 | #define GRIP_INIT_DELAY 2000 /* 2 ms */ | |
96 | ||
97 | #define GRIP_MODE_NONE 0 | |
98 | #define GRIP_MODE_RESET 1 | |
99 | #define GRIP_MODE_GP 2 | |
100 | #define GRIP_MODE_C64 3 | |
101 | ||
17dd3f0f DT |
102 | static const int grip_btn_gp[] = { BTN_TR, BTN_TL, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, -1 }; |
103 | static const int grip_btn_c64[] = { BTN_JOYSTICK, -1 }; | |
1da177e4 | 104 | |
17dd3f0f DT |
105 | static const int grip_abs_gp[] = { ABS_X, ABS_Y, -1 }; |
106 | static const int grip_abs_c64[] = { ABS_X, ABS_Y, -1 }; | |
1da177e4 | 107 | |
17dd3f0f DT |
108 | static const int *grip_abs[] = { NULL, NULL, grip_abs_gp, grip_abs_c64 }; |
109 | static const int *grip_btn[] = { NULL, NULL, grip_btn_gp, grip_btn_c64 }; | |
1da177e4 | 110 | |
17dd3f0f | 111 | static const char *grip_name[] = { NULL, NULL, "Gravis Grip Pad", "Commodore 64 Joystick" }; |
1da177e4 LT |
112 | |
113 | static const int init_seq[] = { | |
114 | 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
115 | 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, | |
116 | 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
117 | 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1 }; | |
118 | ||
119 | /* Maps multiport directional values to X,Y axis values (each axis encoded in 3 bits) */ | |
120 | ||
17dd3f0f | 121 | static const int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5 }; |
1da177e4 | 122 | |
17dd3f0f | 123 | static int register_slot(int i, struct grip_mp *grip); |
1da177e4 LT |
124 | |
125 | /* | |
126 | * Returns whether an odd or even number of bits are on in pkt. | |
127 | */ | |
128 | ||
129 | static int bit_parity(u32 pkt) | |
130 | { | |
131 | int x = pkt ^ (pkt >> 16); | |
132 | x ^= x >> 8; | |
133 | x ^= x >> 4; | |
134 | x ^= x >> 2; | |
135 | x ^= x >> 1; | |
136 | return x & 1; | |
137 | } | |
138 | ||
139 | /* | |
140 | * Poll gameport; return true if all bits set in 'onbits' are on and | |
141 | * all bits set in 'offbits' are off. | |
142 | */ | |
143 | ||
144 | static inline int poll_until(u8 onbits, u8 offbits, int u_sec, struct gameport* gp, u8 *data) | |
145 | { | |
146 | int i, nloops; | |
147 | ||
148 | nloops = gameport_time(gp, u_sec); | |
149 | for (i = 0; i < nloops; i++) { | |
150 | *data = gameport_read(gp); | |
151 | if ((*data & onbits) == onbits && | |
152 | (~(*data) & offbits) == offbits) | |
153 | return 1; | |
154 | } | |
155 | dbg("gameport timed out after %d microseconds.\n", u_sec); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Gets a 28-bit packet from the multiport. | |
161 | * | |
162 | * After getting a packet successfully, commands encoded by sendcode may | |
163 | * be sent to the multiport. | |
164 | * | |
165 | * The multiport clock value is reflected in gameport bit B4. | |
166 | * | |
167 | * Returns a packet status code indicating whether packet is valid, the transfer | |
168 | * mode, and any error conditions. | |
169 | * | |
170 | * sendflags: current I/O status | |
171 | * sendcode: data to send to the multiport if sendflags is nonzero | |
172 | */ | |
173 | ||
174 | static int mp_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
175 | { | |
176 | u8 raw_data; /* raw data from gameport */ | |
177 | u8 data_mask; /* packet data bits from raw_data */ | |
178 | u32 pkt; /* packet temporary storage */ | |
179 | int bits_per_read; /* num packet bits per gameport read */ | |
180 | int portvals = 0; /* used for port value sanity check */ | |
181 | int i; | |
182 | ||
183 | /* Gameport bits B0, B4, B5 should first be off, then B4 should come on. */ | |
184 | ||
185 | *packet = 0; | |
186 | raw_data = gameport_read(gameport); | |
187 | if (raw_data & 1) | |
ab0c3443 | 188 | return IO_RETRY; |
1da177e4 LT |
189 | |
190 | for (i = 0; i < 64; i++) { | |
191 | raw_data = gameport_read(gameport); | |
192 | portvals |= 1 << ((raw_data >> 4) & 3); /* Demux B4, B5 */ | |
193 | } | |
194 | ||
195 | if (portvals == 1) { /* B4, B5 off */ | |
196 | raw_data = gameport_read(gameport); | |
197 | portvals = raw_data & 0xf0; | |
198 | ||
199 | if (raw_data & 0x31) | |
200 | return IO_RESET; | |
201 | gameport_trigger(gameport); | |
202 | ||
203 | if (!poll_until(0x10, 0, 308, gameport, &raw_data)) | |
204 | return IO_RESET; | |
205 | } else | |
206 | return IO_RETRY; | |
207 | ||
208 | /* Determine packet transfer mode and prepare for packet construction. */ | |
209 | ||
210 | if (raw_data & 0x20) { /* 3 data bits/read */ | |
211 | portvals |= raw_data >> 4; /* Compare B4-B7 before & after trigger */ | |
212 | ||
213 | if (portvals != 0xb) | |
214 | return 0; | |
215 | data_mask = 7; | |
216 | bits_per_read = 3; | |
217 | pkt = (PACKET_FULL | PACKET_IO_FAST) >> 28; | |
218 | } else { /* 1 data bit/read */ | |
219 | data_mask = 1; | |
220 | bits_per_read = 1; | |
221 | pkt = (PACKET_FULL | PACKET_IO_SLOW) >> 28; | |
222 | } | |
223 | ||
224 | /* Construct a packet. Final data bits must be zero. */ | |
225 | ||
226 | while (1) { | |
227 | if (!poll_until(0, 0x10, 77, gameport, &raw_data)) | |
228 | return IO_RESET; | |
229 | raw_data = (raw_data >> 5) & data_mask; | |
230 | ||
231 | if (pkt & PACKET_FULL) | |
232 | break; | |
233 | pkt = (pkt << bits_per_read) | raw_data; | |
234 | ||
235 | if (!poll_until(0x10, 0, 77, gameport, &raw_data)) | |
236 | return IO_RESET; | |
237 | } | |
238 | ||
239 | if (raw_data) | |
240 | return IO_RESET; | |
241 | ||
242 | /* If 3 bits/read used, drop from 30 bits to 28. */ | |
243 | ||
244 | if (bits_per_read == 3) { | |
245 | pkt = (pkt & 0xffff0000) | ((pkt << 1) & 0xffff); | |
246 | pkt = (pkt >> 2) | 0xf0000000; | |
247 | } | |
248 | ||
249 | if (bit_parity(pkt) == 1) | |
250 | return IO_RESET; | |
251 | ||
252 | /* Acknowledge packet receipt */ | |
253 | ||
254 | if (!poll_until(0x30, 0, 77, gameport, &raw_data)) | |
255 | return IO_RESET; | |
256 | ||
257 | raw_data = gameport_read(gameport); | |
258 | ||
259 | if (raw_data & 1) | |
260 | return IO_RESET; | |
261 | ||
262 | gameport_trigger(gameport); | |
263 | ||
264 | if (!poll_until(0, 0x20, 77, gameport, &raw_data)) | |
265 | return IO_RESET; | |
266 | ||
267 | /* Return if we just wanted the packet or multiport wants to send more */ | |
268 | ||
269 | *packet = pkt; | |
270 | if ((sendflags == 0) || ((sendflags & IO_RETRY) && !(pkt & PACKET_MP_DONE))) | |
271 | return IO_GOT_PACKET; | |
272 | ||
273 | if (pkt & PACKET_MP_MORE) | |
274 | return IO_GOT_PACKET | IO_RETRY; | |
275 | ||
276 | /* Multiport is done sending packets and is ready to receive data */ | |
277 | ||
278 | if (!poll_until(0x20, 0, 77, gameport, &raw_data)) | |
279 | return IO_GOT_PACKET | IO_RESET; | |
280 | ||
281 | raw_data = gameport_read(gameport); | |
282 | if (raw_data & 1) | |
283 | return IO_GOT_PACKET | IO_RESET; | |
284 | ||
285 | /* Trigger gameport based on bits in sendcode */ | |
286 | ||
287 | gameport_trigger(gameport); | |
288 | do { | |
289 | if (!poll_until(0x20, 0x10, 116, gameport, &raw_data)) | |
290 | return IO_GOT_PACKET | IO_RESET; | |
291 | ||
292 | if (!poll_until(0x30, 0, 193, gameport, &raw_data)) | |
293 | return IO_GOT_PACKET | IO_RESET; | |
294 | ||
295 | if (raw_data & 1) | |
296 | return IO_GOT_PACKET | IO_RESET; | |
297 | ||
298 | if (sendcode & 1) | |
299 | gameport_trigger(gameport); | |
300 | ||
301 | sendcode >>= 1; | |
302 | } while (sendcode); | |
303 | ||
304 | return IO_GOT_PACKET | IO_MODE_FAST; | |
305 | } | |
306 | ||
307 | /* | |
308 | * Disables and restores interrupts for mp_io(), which does the actual I/O. | |
309 | */ | |
310 | ||
311 | static int multiport_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
312 | { | |
313 | int status; | |
314 | unsigned long flags; | |
315 | ||
316 | local_irq_save(flags); | |
317 | status = mp_io(gameport, sendflags, sendcode, packet); | |
318 | local_irq_restore(flags); | |
319 | ||
320 | return status; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Puts multiport into digital mode. Multiport LED turns green. | |
325 | * | |
326 | * Returns true if a valid digital packet was received, false otherwise. | |
327 | */ | |
328 | ||
329 | static int dig_mode_start(struct gameport *gameport, u32 *packet) | |
330 | { | |
331 | int i, seq_len = sizeof(init_seq)/sizeof(int); | |
332 | int flags, tries = 0, bads = 0; | |
333 | ||
334 | for (i = 0; i < seq_len; i++) { /* Send magic sequence */ | |
335 | if (init_seq[i]) | |
336 | gameport_trigger(gameport); | |
337 | udelay(GRIP_INIT_DELAY); | |
338 | } | |
339 | ||
340 | for (i = 0; i < 16; i++) /* Wait for multiport to settle */ | |
341 | udelay(GRIP_INIT_DELAY); | |
342 | ||
343 | while (tries < 64 && bads < 8) { /* Reset multiport and try getting a packet */ | |
344 | ||
345 | flags = multiport_io(gameport, IO_RESET, 0x27, packet); | |
346 | ||
347 | if (flags & IO_MODE_FAST) | |
348 | return 1; | |
349 | ||
350 | if (flags & IO_RETRY) | |
351 | tries++; | |
352 | else | |
353 | bads++; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Packet structure: B0-B15 => gamepad state | |
360 | * B16-B20 => gamepad device type | |
361 | * B21-B24 => multiport slot index (1-4) | |
362 | * | |
363 | * Known device types: 0x1f (grip pad), 0x0 (no device). Others may exist. | |
364 | * | |
365 | * Returns the packet status. | |
366 | */ | |
367 | ||
368 | static int get_and_decode_packet(struct grip_mp *grip, int flags) | |
369 | { | |
17dd3f0f | 370 | struct grip_port *port; |
1da177e4 LT |
371 | u32 packet; |
372 | int joytype = 0; | |
17dd3f0f | 373 | int slot; |
1da177e4 LT |
374 | |
375 | /* Get a packet and check for validity */ | |
376 | ||
377 | flags &= IO_RESET | IO_RETRY; | |
378 | flags = multiport_io(grip->gameport, flags, 0, &packet); | |
379 | grip->reads++; | |
380 | ||
381 | if (packet & PACKET_MP_DONE) | |
382 | flags |= IO_DONE; | |
383 | ||
384 | if (flags && !(flags & IO_GOT_PACKET)) { | |
385 | grip->bads++; | |
386 | return flags; | |
387 | } | |
388 | ||
389 | /* Ignore non-gamepad packets, e.g. multiport hardware version */ | |
390 | ||
391 | slot = ((packet >> 21) & 0xf) - 1; | |
392 | if ((slot < 0) || (slot > 3)) | |
393 | return flags; | |
394 | ||
17dd3f0f DT |
395 | port = grip->port[slot]; |
396 | ||
1da177e4 LT |
397 | /* |
398 | * Handle "reset" packets, which occur at startup, and when gamepads | |
399 | * are removed or plugged in. May contain configuration of a new gamepad. | |
400 | */ | |
401 | ||
402 | joytype = (packet >> 16) & 0x1f; | |
403 | if (!joytype) { | |
404 | ||
17dd3f0f | 405 | if (port->registered) { |
1da177e4 | 406 | printk(KERN_INFO "grip_mp: removing %s, slot %d\n", |
17dd3f0f DT |
407 | grip_name[port->mode], slot); |
408 | input_unregister_device(port->dev); | |
409 | port->registered = 0; | |
1da177e4 LT |
410 | } |
411 | dbg("Reset: grip multiport slot %d\n", slot); | |
17dd3f0f | 412 | port->mode = GRIP_MODE_RESET; |
1da177e4 LT |
413 | flags |= IO_SLOT_CHANGE; |
414 | return flags; | |
415 | } | |
416 | ||
417 | /* Interpret a grip pad packet */ | |
418 | ||
419 | if (joytype == 0x1f) { | |
420 | ||
421 | int dir = (packet >> 8) & 0xf; /* eight way directional value */ | |
17dd3f0f DT |
422 | port->buttons = (~packet) & 0xff; |
423 | port->yaxes = ((axis_map[dir] >> 2) & 3) - 1; | |
424 | port->xaxes = (axis_map[dir] & 3) - 1; | |
425 | port->dirty = 1; | |
1da177e4 | 426 | |
17dd3f0f | 427 | if (port->mode == GRIP_MODE_RESET) |
1da177e4 LT |
428 | flags |= IO_SLOT_CHANGE; |
429 | ||
17dd3f0f | 430 | port->mode = GRIP_MODE_GP; |
1da177e4 | 431 | |
17dd3f0f | 432 | if (!port->registered) { |
1da177e4 LT |
433 | dbg("New Grip pad in multiport slot %d.\n", slot); |
434 | register_slot(slot, grip); | |
435 | } | |
436 | return flags; | |
437 | } | |
438 | ||
439 | /* Handle non-grip device codes. For now, just print diagnostics. */ | |
440 | ||
441 | { | |
442 | static int strange_code = 0; | |
443 | if (strange_code != joytype) { | |
444 | printk(KERN_INFO "Possible non-grip pad/joystick detected.\n"); | |
445 | printk(KERN_INFO "Got joy type 0x%x and packet 0x%x.\n", joytype, packet); | |
446 | strange_code = joytype; | |
447 | } | |
448 | } | |
449 | return flags; | |
450 | } | |
451 | ||
452 | /* | |
453 | * Returns true if all multiport slot states appear valid. | |
454 | */ | |
455 | ||
456 | static int slots_valid(struct grip_mp *grip) | |
457 | { | |
458 | int flags, slot, invalid = 0, active = 0; | |
459 | ||
460 | flags = get_and_decode_packet(grip, 0); | |
461 | if (!(flags & IO_GOT_PACKET)) | |
462 | return 0; | |
463 | ||
464 | for (slot = 0; slot < 4; slot++) { | |
17dd3f0f | 465 | if (grip->port[slot]->mode == GRIP_MODE_RESET) |
1da177e4 | 466 | invalid = 1; |
17dd3f0f | 467 | if (grip->port[slot]->mode != GRIP_MODE_NONE) |
1da177e4 LT |
468 | active = 1; |
469 | } | |
470 | ||
471 | /* Return true if no active slot but multiport sent all its data */ | |
472 | if (!active) | |
473 | return (flags & IO_DONE) ? 1 : 0; | |
474 | ||
475 | /* Return false if invalid device code received */ | |
476 | return invalid ? 0 : 1; | |
477 | } | |
478 | ||
479 | /* | |
480 | * Returns whether the multiport was placed into digital mode and | |
481 | * able to communicate its state successfully. | |
482 | */ | |
483 | ||
484 | static int multiport_init(struct grip_mp *grip) | |
485 | { | |
486 | int dig_mode, initialized = 0, tries = 0; | |
487 | u32 packet; | |
488 | ||
489 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
490 | while (!dig_mode && tries < 4) { | |
491 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
492 | tries++; | |
493 | } | |
494 | ||
495 | if (dig_mode) | |
496 | dbg("multiport_init(): digital mode activated.\n"); | |
497 | else { | |
498 | dbg("multiport_init(): unable to activate digital mode.\n"); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | /* Get packets, store multiport state, and check state's validity */ | |
503 | for (tries = 0; tries < 4096; tries++) { | |
17dd3f0f | 504 | if (slots_valid(grip)) { |
1da177e4 LT |
505 | initialized = 1; |
506 | break; | |
507 | } | |
508 | } | |
509 | dbg("multiport_init(): initialized == %d\n", initialized); | |
510 | return initialized; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Reports joystick state to the linux input layer. | |
515 | */ | |
516 | ||
517 | static void report_slot(struct grip_mp *grip, int slot) | |
518 | { | |
17dd3f0f DT |
519 | struct grip_port *port = grip->port[slot]; |
520 | int i; | |
1da177e4 LT |
521 | |
522 | /* Store button states with linux input driver */ | |
523 | ||
524 | for (i = 0; i < 8; i++) | |
17dd3f0f | 525 | input_report_key(port->dev, grip_btn_gp[i], (port->buttons >> i) & 1); |
1da177e4 LT |
526 | |
527 | /* Store axis states with linux driver */ | |
528 | ||
17dd3f0f DT |
529 | input_report_abs(port->dev, ABS_X, port->xaxes); |
530 | input_report_abs(port->dev, ABS_Y, port->yaxes); | |
1da177e4 LT |
531 | |
532 | /* Tell the receiver of the events to process them */ | |
533 | ||
17dd3f0f | 534 | input_sync(port->dev); |
1da177e4 | 535 | |
17dd3f0f | 536 | port->dirty = 0; |
1da177e4 LT |
537 | } |
538 | ||
539 | /* | |
540 | * Get the multiport state. | |
541 | */ | |
542 | ||
543 | static void grip_poll(struct gameport *gameport) | |
544 | { | |
545 | struct grip_mp *grip = gameport_get_drvdata(gameport); | |
546 | int i, npkts, flags; | |
547 | ||
548 | for (npkts = 0; npkts < 4; npkts++) { | |
549 | flags = IO_RETRY; | |
550 | for (i = 0; i < 32; i++) { | |
551 | flags = get_and_decode_packet(grip, flags); | |
552 | if ((flags & IO_GOT_PACKET) || !(flags & IO_RETRY)) | |
553 | break; | |
554 | } | |
555 | if (flags & IO_DONE) | |
556 | break; | |
557 | } | |
558 | ||
559 | for (i = 0; i < 4; i++) | |
17dd3f0f | 560 | if (grip->port[i]->dirty) |
1da177e4 LT |
561 | report_slot(grip, i); |
562 | } | |
563 | ||
564 | /* | |
565 | * Called when a joystick device file is opened | |
566 | */ | |
567 | ||
568 | static int grip_open(struct input_dev *dev) | |
569 | { | |
570 | struct grip_mp *grip = dev->private; | |
571 | ||
572 | gameport_start_polling(grip->gameport); | |
573 | return 0; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Called when a joystick device file is closed | |
578 | */ | |
579 | ||
580 | static void grip_close(struct input_dev *dev) | |
581 | { | |
582 | struct grip_mp *grip = dev->private; | |
583 | ||
584 | gameport_start_polling(grip->gameport); | |
585 | } | |
586 | ||
587 | /* | |
588 | * Tell the linux input layer about a newly plugged-in gamepad. | |
589 | */ | |
590 | ||
17dd3f0f | 591 | static int register_slot(int slot, struct grip_mp *grip) |
1da177e4 | 592 | { |
17dd3f0f DT |
593 | struct grip_port *port = grip->port[slot]; |
594 | struct input_dev *input_dev; | |
1da177e4 LT |
595 | int j, t; |
596 | ||
17dd3f0f DT |
597 | port->dev = input_dev = input_allocate_device(); |
598 | if (!input_dev) | |
599 | return -ENOMEM; | |
600 | ||
601 | input_dev->name = grip_name[port->mode]; | |
602 | input_dev->id.bustype = BUS_GAMEPORT; | |
603 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; | |
604 | input_dev->id.product = 0x0100 + port->mode; | |
605 | input_dev->id.version = 0x0100; | |
606 | input_dev->cdev.dev = &grip->gameport->dev; | |
607 | input_dev->private = grip; | |
608 | ||
609 | input_dev->open = grip_open; | |
610 | input_dev->close = grip_close; | |
1da177e4 | 611 | |
17dd3f0f | 612 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
1da177e4 | 613 | |
17dd3f0f DT |
614 | for (j = 0; (t = grip_abs[port->mode][j]) >= 0; j++) |
615 | input_set_abs_params(input_dev, t, -1, 1, 0, 0); | |
616 | ||
617 | for (j = 0; (t = grip_btn[port->mode][j]) >= 0; j++) | |
1da177e4 | 618 | if (t > 0) |
17dd3f0f | 619 | set_bit(t, input_dev->keybit); |
1da177e4 | 620 | |
17dd3f0f DT |
621 | input_register_device(port->dev); |
622 | port->registered = 1; | |
1da177e4 | 623 | |
17dd3f0f | 624 | if (port->dirty) /* report initial state, if any */ |
1da177e4 LT |
625 | report_slot(grip, slot); |
626 | ||
17dd3f0f | 627 | return 0; |
1da177e4 LT |
628 | } |
629 | ||
630 | static int grip_connect(struct gameport *gameport, struct gameport_driver *drv) | |
631 | { | |
632 | struct grip_mp *grip; | |
633 | int err; | |
634 | ||
a97e148a | 635 | if (!(grip = kzalloc(sizeof(struct grip_mp), GFP_KERNEL))) |
1da177e4 LT |
636 | return -ENOMEM; |
637 | ||
638 | grip->gameport = gameport; | |
639 | ||
640 | gameport_set_drvdata(gameport, grip); | |
641 | ||
642 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
643 | if (err) | |
644 | goto fail1; | |
645 | ||
646 | gameport_set_poll_handler(gameport, grip_poll); | |
647 | gameport_set_poll_interval(gameport, 20); | |
648 | ||
649 | if (!multiport_init(grip)) { | |
650 | err = -ENODEV; | |
651 | goto fail2; | |
652 | } | |
653 | ||
17dd3f0f | 654 | if (!grip->port[0]->mode && !grip->port[1]->mode && !grip->port[2]->mode && !grip->port[3]->mode) { |
1da177e4 LT |
655 | /* nothing plugged in */ |
656 | err = -ENODEV; | |
657 | goto fail2; | |
658 | } | |
659 | ||
660 | return 0; | |
661 | ||
662 | fail2: gameport_close(gameport); | |
663 | fail1: gameport_set_drvdata(gameport, NULL); | |
664 | kfree(grip); | |
665 | return err; | |
666 | } | |
667 | ||
668 | static void grip_disconnect(struct gameport *gameport) | |
669 | { | |
670 | struct grip_mp *grip = gameport_get_drvdata(gameport); | |
671 | int i; | |
672 | ||
673 | for (i = 0; i < 4; i++) | |
17dd3f0f DT |
674 | if (grip->port[i]->registered) |
675 | input_unregister_device(grip->port[i]->dev); | |
1da177e4 LT |
676 | gameport_close(gameport); |
677 | gameport_set_drvdata(gameport, NULL); | |
678 | kfree(grip); | |
679 | } | |
680 | ||
681 | static struct gameport_driver grip_drv = { | |
682 | .driver = { | |
683 | .name = "grip_mp", | |
684 | }, | |
685 | .description = DRIVER_DESC, | |
686 | .connect = grip_connect, | |
687 | .disconnect = grip_disconnect, | |
688 | }; | |
689 | ||
690 | static int __init grip_init(void) | |
691 | { | |
692 | gameport_register_driver(&grip_drv); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | static void __exit grip_exit(void) | |
697 | { | |
698 | gameport_unregister_driver(&grip_drv); | |
699 | } | |
700 | ||
701 | module_init(grip_init); | |
702 | module_exit(grip_exit); |