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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Driver for the Gravis Grip Multiport, a gamepad "hub" that |
4 | * connects up to four 9-pin digital gamepads/joysticks. | |
5 | * Driver tested on SMP and UP kernel versions 2.4.18-4 and 2.4.18-5. | |
6 | * | |
7 | * Thanks to Chris Gassib for helpful advice. | |
8 | * | |
9 | * Copyright (c) 2002 Brian Bonnlander, Bill Soudan | |
10 | * Copyright (c) 1998-2000 Vojtech Pavlik | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
1da177e4 LT |
15 | #include <linux/slab.h> |
16 | #include <linux/gameport.h> | |
17 | #include <linux/input.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/proc_fs.h> | |
4e57b681 | 20 | #include <linux/jiffies.h> |
1da177e4 LT |
21 | |
22 | #define DRIVER_DESC "Gravis Grip Multiport driver" | |
23 | ||
24 | MODULE_AUTHOR("Brian Bonnlander"); | |
25 | MODULE_DESCRIPTION(DRIVER_DESC); | |
26 | MODULE_LICENSE("GPL"); | |
27 | ||
28 | #ifdef GRIP_DEBUG | |
29 | #define dbg(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" , ## arg) | |
30 | #else | |
31 | #define dbg(format, arg...) do {} while (0) | |
32 | #endif | |
33 | ||
17dd3f0f | 34 | #define GRIP_MAX_PORTS 4 |
1da177e4 LT |
35 | /* |
36 | * Grip multiport state | |
37 | */ | |
38 | ||
17dd3f0f DT |
39 | struct grip_port { |
40 | struct input_dev *dev; | |
41 | int mode; | |
42 | int registered; | |
43 | ||
44 | /* individual gamepad states */ | |
45 | int buttons; | |
46 | int xaxes; | |
47 | int yaxes; | |
48 | int dirty; /* has the state been updated? */ | |
49 | }; | |
50 | ||
1da177e4 LT |
51 | struct grip_mp { |
52 | struct gameport *gameport; | |
17dd3f0f | 53 | struct grip_port *port[GRIP_MAX_PORTS]; |
1da177e4 LT |
54 | int reads; |
55 | int bads; | |
1da177e4 LT |
56 | }; |
57 | ||
58 | /* | |
59 | * Multiport packet interpretation | |
60 | */ | |
61 | ||
62 | #define PACKET_FULL 0x80000000 /* packet is full */ | |
63 | #define PACKET_IO_FAST 0x40000000 /* 3 bits per gameport read */ | |
64 | #define PACKET_IO_SLOW 0x20000000 /* 1 bit per gameport read */ | |
65 | #define PACKET_MP_MORE 0x04000000 /* multiport wants to send more */ | |
66 | #define PACKET_MP_DONE 0x02000000 /* multiport done sending */ | |
67 | ||
68 | /* | |
69 | * Packet status code interpretation | |
70 | */ | |
71 | ||
72 | #define IO_GOT_PACKET 0x0100 /* Got a packet */ | |
73 | #define IO_MODE_FAST 0x0200 /* Used 3 data bits per gameport read */ | |
74 | #define IO_SLOT_CHANGE 0x0800 /* Multiport physical slot status changed */ | |
75 | #define IO_DONE 0x1000 /* Multiport is done sending packets */ | |
76 | #define IO_RETRY 0x4000 /* Try again later to get packet */ | |
77 | #define IO_RESET 0x8000 /* Force multiport to resend all packets */ | |
78 | ||
79 | /* | |
80 | * Gamepad configuration data. Other 9-pin digital joystick devices | |
81 | * may work with the multiport, so this may not be an exhaustive list! | |
82 | * Commodore 64 joystick remains untested. | |
83 | */ | |
84 | ||
85 | #define GRIP_INIT_DELAY 2000 /* 2 ms */ | |
86 | ||
87 | #define GRIP_MODE_NONE 0 | |
88 | #define GRIP_MODE_RESET 1 | |
89 | #define GRIP_MODE_GP 2 | |
90 | #define GRIP_MODE_C64 3 | |
91 | ||
17dd3f0f DT |
92 | static const int grip_btn_gp[] = { BTN_TR, BTN_TL, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, -1 }; |
93 | static const int grip_btn_c64[] = { BTN_JOYSTICK, -1 }; | |
1da177e4 | 94 | |
17dd3f0f DT |
95 | static const int grip_abs_gp[] = { ABS_X, ABS_Y, -1 }; |
96 | static const int grip_abs_c64[] = { ABS_X, ABS_Y, -1 }; | |
1da177e4 | 97 | |
17dd3f0f DT |
98 | static const int *grip_abs[] = { NULL, NULL, grip_abs_gp, grip_abs_c64 }; |
99 | static const int *grip_btn[] = { NULL, NULL, grip_btn_gp, grip_btn_c64 }; | |
1da177e4 | 100 | |
17dd3f0f | 101 | static const char *grip_name[] = { NULL, NULL, "Gravis Grip Pad", "Commodore 64 Joystick" }; |
1da177e4 LT |
102 | |
103 | static const int init_seq[] = { | |
104 | 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
105 | 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, | |
106 | 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, | |
107 | 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1 }; | |
108 | ||
109 | /* Maps multiport directional values to X,Y axis values (each axis encoded in 3 bits) */ | |
110 | ||
17dd3f0f | 111 | static const int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5 }; |
1da177e4 | 112 | |
17dd3f0f | 113 | static int register_slot(int i, struct grip_mp *grip); |
1da177e4 LT |
114 | |
115 | /* | |
116 | * Returns whether an odd or even number of bits are on in pkt. | |
117 | */ | |
118 | ||
119 | static int bit_parity(u32 pkt) | |
120 | { | |
121 | int x = pkt ^ (pkt >> 16); | |
122 | x ^= x >> 8; | |
123 | x ^= x >> 4; | |
124 | x ^= x >> 2; | |
125 | x ^= x >> 1; | |
126 | return x & 1; | |
127 | } | |
128 | ||
129 | /* | |
130 | * Poll gameport; return true if all bits set in 'onbits' are on and | |
131 | * all bits set in 'offbits' are off. | |
132 | */ | |
133 | ||
134 | static inline int poll_until(u8 onbits, u8 offbits, int u_sec, struct gameport* gp, u8 *data) | |
135 | { | |
136 | int i, nloops; | |
137 | ||
138 | nloops = gameport_time(gp, u_sec); | |
139 | for (i = 0; i < nloops; i++) { | |
140 | *data = gameport_read(gp); | |
141 | if ((*data & onbits) == onbits && | |
142 | (~(*data) & offbits) == offbits) | |
143 | return 1; | |
144 | } | |
145 | dbg("gameport timed out after %d microseconds.\n", u_sec); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Gets a 28-bit packet from the multiport. | |
151 | * | |
152 | * After getting a packet successfully, commands encoded by sendcode may | |
153 | * be sent to the multiport. | |
154 | * | |
155 | * The multiport clock value is reflected in gameport bit B4. | |
156 | * | |
157 | * Returns a packet status code indicating whether packet is valid, the transfer | |
158 | * mode, and any error conditions. | |
159 | * | |
160 | * sendflags: current I/O status | |
161 | * sendcode: data to send to the multiport if sendflags is nonzero | |
162 | */ | |
163 | ||
164 | static int mp_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
165 | { | |
166 | u8 raw_data; /* raw data from gameport */ | |
167 | u8 data_mask; /* packet data bits from raw_data */ | |
168 | u32 pkt; /* packet temporary storage */ | |
169 | int bits_per_read; /* num packet bits per gameport read */ | |
170 | int portvals = 0; /* used for port value sanity check */ | |
171 | int i; | |
172 | ||
173 | /* Gameport bits B0, B4, B5 should first be off, then B4 should come on. */ | |
174 | ||
175 | *packet = 0; | |
176 | raw_data = gameport_read(gameport); | |
177 | if (raw_data & 1) | |
ab0c3443 | 178 | return IO_RETRY; |
1da177e4 LT |
179 | |
180 | for (i = 0; i < 64; i++) { | |
181 | raw_data = gameport_read(gameport); | |
182 | portvals |= 1 << ((raw_data >> 4) & 3); /* Demux B4, B5 */ | |
183 | } | |
184 | ||
185 | if (portvals == 1) { /* B4, B5 off */ | |
186 | raw_data = gameport_read(gameport); | |
187 | portvals = raw_data & 0xf0; | |
188 | ||
189 | if (raw_data & 0x31) | |
190 | return IO_RESET; | |
191 | gameport_trigger(gameport); | |
192 | ||
193 | if (!poll_until(0x10, 0, 308, gameport, &raw_data)) | |
194 | return IO_RESET; | |
195 | } else | |
196 | return IO_RETRY; | |
197 | ||
198 | /* Determine packet transfer mode and prepare for packet construction. */ | |
199 | ||
200 | if (raw_data & 0x20) { /* 3 data bits/read */ | |
201 | portvals |= raw_data >> 4; /* Compare B4-B7 before & after trigger */ | |
202 | ||
203 | if (portvals != 0xb) | |
204 | return 0; | |
205 | data_mask = 7; | |
206 | bits_per_read = 3; | |
207 | pkt = (PACKET_FULL | PACKET_IO_FAST) >> 28; | |
208 | } else { /* 1 data bit/read */ | |
209 | data_mask = 1; | |
210 | bits_per_read = 1; | |
211 | pkt = (PACKET_FULL | PACKET_IO_SLOW) >> 28; | |
212 | } | |
213 | ||
214 | /* Construct a packet. Final data bits must be zero. */ | |
215 | ||
216 | while (1) { | |
217 | if (!poll_until(0, 0x10, 77, gameport, &raw_data)) | |
218 | return IO_RESET; | |
219 | raw_data = (raw_data >> 5) & data_mask; | |
220 | ||
221 | if (pkt & PACKET_FULL) | |
222 | break; | |
223 | pkt = (pkt << bits_per_read) | raw_data; | |
224 | ||
225 | if (!poll_until(0x10, 0, 77, gameport, &raw_data)) | |
226 | return IO_RESET; | |
227 | } | |
228 | ||
229 | if (raw_data) | |
230 | return IO_RESET; | |
231 | ||
232 | /* If 3 bits/read used, drop from 30 bits to 28. */ | |
233 | ||
234 | if (bits_per_read == 3) { | |
235 | pkt = (pkt & 0xffff0000) | ((pkt << 1) & 0xffff); | |
236 | pkt = (pkt >> 2) | 0xf0000000; | |
237 | } | |
238 | ||
239 | if (bit_parity(pkt) == 1) | |
240 | return IO_RESET; | |
241 | ||
242 | /* Acknowledge packet receipt */ | |
243 | ||
244 | if (!poll_until(0x30, 0, 77, gameport, &raw_data)) | |
245 | return IO_RESET; | |
246 | ||
247 | raw_data = gameport_read(gameport); | |
248 | ||
249 | if (raw_data & 1) | |
250 | return IO_RESET; | |
251 | ||
252 | gameport_trigger(gameport); | |
253 | ||
254 | if (!poll_until(0, 0x20, 77, gameport, &raw_data)) | |
255 | return IO_RESET; | |
256 | ||
257 | /* Return if we just wanted the packet or multiport wants to send more */ | |
258 | ||
259 | *packet = pkt; | |
260 | if ((sendflags == 0) || ((sendflags & IO_RETRY) && !(pkt & PACKET_MP_DONE))) | |
261 | return IO_GOT_PACKET; | |
262 | ||
263 | if (pkt & PACKET_MP_MORE) | |
264 | return IO_GOT_PACKET | IO_RETRY; | |
265 | ||
266 | /* Multiport is done sending packets and is ready to receive data */ | |
267 | ||
268 | if (!poll_until(0x20, 0, 77, gameport, &raw_data)) | |
269 | return IO_GOT_PACKET | IO_RESET; | |
270 | ||
271 | raw_data = gameport_read(gameport); | |
272 | if (raw_data & 1) | |
273 | return IO_GOT_PACKET | IO_RESET; | |
274 | ||
275 | /* Trigger gameport based on bits in sendcode */ | |
276 | ||
277 | gameport_trigger(gameport); | |
278 | do { | |
279 | if (!poll_until(0x20, 0x10, 116, gameport, &raw_data)) | |
280 | return IO_GOT_PACKET | IO_RESET; | |
281 | ||
282 | if (!poll_until(0x30, 0, 193, gameport, &raw_data)) | |
283 | return IO_GOT_PACKET | IO_RESET; | |
284 | ||
285 | if (raw_data & 1) | |
286 | return IO_GOT_PACKET | IO_RESET; | |
287 | ||
288 | if (sendcode & 1) | |
289 | gameport_trigger(gameport); | |
290 | ||
291 | sendcode >>= 1; | |
292 | } while (sendcode); | |
293 | ||
294 | return IO_GOT_PACKET | IO_MODE_FAST; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Disables and restores interrupts for mp_io(), which does the actual I/O. | |
299 | */ | |
300 | ||
301 | static int multiport_io(struct gameport* gameport, int sendflags, int sendcode, u32 *packet) | |
302 | { | |
303 | int status; | |
304 | unsigned long flags; | |
305 | ||
306 | local_irq_save(flags); | |
307 | status = mp_io(gameport, sendflags, sendcode, packet); | |
308 | local_irq_restore(flags); | |
309 | ||
310 | return status; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Puts multiport into digital mode. Multiport LED turns green. | |
315 | * | |
316 | * Returns true if a valid digital packet was received, false otherwise. | |
317 | */ | |
318 | ||
319 | static int dig_mode_start(struct gameport *gameport, u32 *packet) | |
320 | { | |
5ec1f7f3 | 321 | int i; |
1da177e4 LT |
322 | int flags, tries = 0, bads = 0; |
323 | ||
5ec1f7f3 | 324 | for (i = 0; i < ARRAY_SIZE(init_seq); i++) { /* Send magic sequence */ |
1da177e4 LT |
325 | if (init_seq[i]) |
326 | gameport_trigger(gameport); | |
327 | udelay(GRIP_INIT_DELAY); | |
328 | } | |
329 | ||
330 | for (i = 0; i < 16; i++) /* Wait for multiport to settle */ | |
331 | udelay(GRIP_INIT_DELAY); | |
332 | ||
333 | while (tries < 64 && bads < 8) { /* Reset multiport and try getting a packet */ | |
334 | ||
335 | flags = multiport_io(gameport, IO_RESET, 0x27, packet); | |
336 | ||
337 | if (flags & IO_MODE_FAST) | |
338 | return 1; | |
339 | ||
340 | if (flags & IO_RETRY) | |
341 | tries++; | |
342 | else | |
343 | bads++; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Packet structure: B0-B15 => gamepad state | |
350 | * B16-B20 => gamepad device type | |
351 | * B21-B24 => multiport slot index (1-4) | |
352 | * | |
353 | * Known device types: 0x1f (grip pad), 0x0 (no device). Others may exist. | |
354 | * | |
355 | * Returns the packet status. | |
356 | */ | |
357 | ||
358 | static int get_and_decode_packet(struct grip_mp *grip, int flags) | |
359 | { | |
17dd3f0f | 360 | struct grip_port *port; |
1da177e4 LT |
361 | u32 packet; |
362 | int joytype = 0; | |
17dd3f0f | 363 | int slot; |
1da177e4 LT |
364 | |
365 | /* Get a packet and check for validity */ | |
366 | ||
367 | flags &= IO_RESET | IO_RETRY; | |
368 | flags = multiport_io(grip->gameport, flags, 0, &packet); | |
369 | grip->reads++; | |
370 | ||
371 | if (packet & PACKET_MP_DONE) | |
372 | flags |= IO_DONE; | |
373 | ||
374 | if (flags && !(flags & IO_GOT_PACKET)) { | |
375 | grip->bads++; | |
376 | return flags; | |
377 | } | |
378 | ||
379 | /* Ignore non-gamepad packets, e.g. multiport hardware version */ | |
380 | ||
381 | slot = ((packet >> 21) & 0xf) - 1; | |
382 | if ((slot < 0) || (slot > 3)) | |
383 | return flags; | |
384 | ||
17dd3f0f DT |
385 | port = grip->port[slot]; |
386 | ||
1da177e4 LT |
387 | /* |
388 | * Handle "reset" packets, which occur at startup, and when gamepads | |
389 | * are removed or plugged in. May contain configuration of a new gamepad. | |
390 | */ | |
391 | ||
392 | joytype = (packet >> 16) & 0x1f; | |
393 | if (!joytype) { | |
394 | ||
17dd3f0f | 395 | if (port->registered) { |
1da177e4 | 396 | printk(KERN_INFO "grip_mp: removing %s, slot %d\n", |
17dd3f0f DT |
397 | grip_name[port->mode], slot); |
398 | input_unregister_device(port->dev); | |
399 | port->registered = 0; | |
1da177e4 LT |
400 | } |
401 | dbg("Reset: grip multiport slot %d\n", slot); | |
17dd3f0f | 402 | port->mode = GRIP_MODE_RESET; |
1da177e4 LT |
403 | flags |= IO_SLOT_CHANGE; |
404 | return flags; | |
405 | } | |
406 | ||
407 | /* Interpret a grip pad packet */ | |
408 | ||
409 | if (joytype == 0x1f) { | |
410 | ||
411 | int dir = (packet >> 8) & 0xf; /* eight way directional value */ | |
17dd3f0f DT |
412 | port->buttons = (~packet) & 0xff; |
413 | port->yaxes = ((axis_map[dir] >> 2) & 3) - 1; | |
414 | port->xaxes = (axis_map[dir] & 3) - 1; | |
415 | port->dirty = 1; | |
1da177e4 | 416 | |
17dd3f0f | 417 | if (port->mode == GRIP_MODE_RESET) |
1da177e4 LT |
418 | flags |= IO_SLOT_CHANGE; |
419 | ||
17dd3f0f | 420 | port->mode = GRIP_MODE_GP; |
1da177e4 | 421 | |
17dd3f0f | 422 | if (!port->registered) { |
1da177e4 | 423 | dbg("New Grip pad in multiport slot %d.\n", slot); |
127278ce DT |
424 | if (register_slot(slot, grip)) { |
425 | port->mode = GRIP_MODE_RESET; | |
426 | port->dirty = 0; | |
427 | } | |
1da177e4 LT |
428 | } |
429 | return flags; | |
430 | } | |
431 | ||
432 | /* Handle non-grip device codes. For now, just print diagnostics. */ | |
433 | ||
434 | { | |
435 | static int strange_code = 0; | |
436 | if (strange_code != joytype) { | |
437 | printk(KERN_INFO "Possible non-grip pad/joystick detected.\n"); | |
438 | printk(KERN_INFO "Got joy type 0x%x and packet 0x%x.\n", joytype, packet); | |
439 | strange_code = joytype; | |
440 | } | |
441 | } | |
442 | return flags; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Returns true if all multiport slot states appear valid. | |
447 | */ | |
448 | ||
449 | static int slots_valid(struct grip_mp *grip) | |
450 | { | |
451 | int flags, slot, invalid = 0, active = 0; | |
452 | ||
453 | flags = get_and_decode_packet(grip, 0); | |
454 | if (!(flags & IO_GOT_PACKET)) | |
455 | return 0; | |
456 | ||
457 | for (slot = 0; slot < 4; slot++) { | |
17dd3f0f | 458 | if (grip->port[slot]->mode == GRIP_MODE_RESET) |
1da177e4 | 459 | invalid = 1; |
17dd3f0f | 460 | if (grip->port[slot]->mode != GRIP_MODE_NONE) |
1da177e4 LT |
461 | active = 1; |
462 | } | |
463 | ||
464 | /* Return true if no active slot but multiport sent all its data */ | |
465 | if (!active) | |
466 | return (flags & IO_DONE) ? 1 : 0; | |
467 | ||
468 | /* Return false if invalid device code received */ | |
469 | return invalid ? 0 : 1; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Returns whether the multiport was placed into digital mode and | |
474 | * able to communicate its state successfully. | |
475 | */ | |
476 | ||
477 | static int multiport_init(struct grip_mp *grip) | |
478 | { | |
479 | int dig_mode, initialized = 0, tries = 0; | |
480 | u32 packet; | |
481 | ||
482 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
483 | while (!dig_mode && tries < 4) { | |
484 | dig_mode = dig_mode_start(grip->gameport, &packet); | |
485 | tries++; | |
486 | } | |
487 | ||
488 | if (dig_mode) | |
489 | dbg("multiport_init(): digital mode activated.\n"); | |
490 | else { | |
491 | dbg("multiport_init(): unable to activate digital mode.\n"); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /* Get packets, store multiport state, and check state's validity */ | |
496 | for (tries = 0; tries < 4096; tries++) { | |
17dd3f0f | 497 | if (slots_valid(grip)) { |
1da177e4 LT |
498 | initialized = 1; |
499 | break; | |
500 | } | |
501 | } | |
502 | dbg("multiport_init(): initialized == %d\n", initialized); | |
503 | return initialized; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Reports joystick state to the linux input layer. | |
508 | */ | |
509 | ||
510 | static void report_slot(struct grip_mp *grip, int slot) | |
511 | { | |
17dd3f0f DT |
512 | struct grip_port *port = grip->port[slot]; |
513 | int i; | |
1da177e4 LT |
514 | |
515 | /* Store button states with linux input driver */ | |
516 | ||
517 | for (i = 0; i < 8; i++) | |
17dd3f0f | 518 | input_report_key(port->dev, grip_btn_gp[i], (port->buttons >> i) & 1); |
1da177e4 LT |
519 | |
520 | /* Store axis states with linux driver */ | |
521 | ||
17dd3f0f DT |
522 | input_report_abs(port->dev, ABS_X, port->xaxes); |
523 | input_report_abs(port->dev, ABS_Y, port->yaxes); | |
1da177e4 LT |
524 | |
525 | /* Tell the receiver of the events to process them */ | |
526 | ||
17dd3f0f | 527 | input_sync(port->dev); |
1da177e4 | 528 | |
17dd3f0f | 529 | port->dirty = 0; |
1da177e4 LT |
530 | } |
531 | ||
532 | /* | |
533 | * Get the multiport state. | |
534 | */ | |
535 | ||
536 | static void grip_poll(struct gameport *gameport) | |
537 | { | |
538 | struct grip_mp *grip = gameport_get_drvdata(gameport); | |
539 | int i, npkts, flags; | |
540 | ||
541 | for (npkts = 0; npkts < 4; npkts++) { | |
542 | flags = IO_RETRY; | |
543 | for (i = 0; i < 32; i++) { | |
544 | flags = get_and_decode_packet(grip, flags); | |
545 | if ((flags & IO_GOT_PACKET) || !(flags & IO_RETRY)) | |
546 | break; | |
547 | } | |
548 | if (flags & IO_DONE) | |
549 | break; | |
550 | } | |
551 | ||
552 | for (i = 0; i < 4; i++) | |
17dd3f0f | 553 | if (grip->port[i]->dirty) |
1da177e4 LT |
554 | report_slot(grip, i); |
555 | } | |
556 | ||
557 | /* | |
558 | * Called when a joystick device file is opened | |
559 | */ | |
560 | ||
561 | static int grip_open(struct input_dev *dev) | |
562 | { | |
8715c1cf | 563 | struct grip_mp *grip = input_get_drvdata(dev); |
1da177e4 LT |
564 | |
565 | gameport_start_polling(grip->gameport); | |
566 | return 0; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Called when a joystick device file is closed | |
571 | */ | |
572 | ||
573 | static void grip_close(struct input_dev *dev) | |
574 | { | |
8715c1cf | 575 | struct grip_mp *grip = input_get_drvdata(dev); |
1da177e4 | 576 | |
8715c1cf | 577 | gameport_stop_polling(grip->gameport); |
1da177e4 LT |
578 | } |
579 | ||
580 | /* | |
581 | * Tell the linux input layer about a newly plugged-in gamepad. | |
582 | */ | |
583 | ||
17dd3f0f | 584 | static int register_slot(int slot, struct grip_mp *grip) |
1da177e4 | 585 | { |
17dd3f0f DT |
586 | struct grip_port *port = grip->port[slot]; |
587 | struct input_dev *input_dev; | |
1da177e4 | 588 | int j, t; |
127278ce | 589 | int err; |
1da177e4 | 590 | |
17dd3f0f DT |
591 | port->dev = input_dev = input_allocate_device(); |
592 | if (!input_dev) | |
593 | return -ENOMEM; | |
594 | ||
595 | input_dev->name = grip_name[port->mode]; | |
596 | input_dev->id.bustype = BUS_GAMEPORT; | |
597 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; | |
598 | input_dev->id.product = 0x0100 + port->mode; | |
599 | input_dev->id.version = 0x0100; | |
935e658e | 600 | input_dev->dev.parent = &grip->gameport->dev; |
8715c1cf DT |
601 | |
602 | input_set_drvdata(input_dev, grip); | |
17dd3f0f DT |
603 | |
604 | input_dev->open = grip_open; | |
605 | input_dev->close = grip_close; | |
1da177e4 | 606 | |
7b19ada2 | 607 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
1da177e4 | 608 | |
17dd3f0f DT |
609 | for (j = 0; (t = grip_abs[port->mode][j]) >= 0; j++) |
610 | input_set_abs_params(input_dev, t, -1, 1, 0, 0); | |
611 | ||
612 | for (j = 0; (t = grip_btn[port->mode][j]) >= 0; j++) | |
1da177e4 | 613 | if (t > 0) |
17dd3f0f | 614 | set_bit(t, input_dev->keybit); |
1da177e4 | 615 | |
127278ce DT |
616 | err = input_register_device(port->dev); |
617 | if (err) { | |
618 | input_free_device(port->dev); | |
619 | return err; | |
620 | } | |
621 | ||
17dd3f0f | 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 | ||
98a84131 | 690 | module_gameport_driver(grip_drv); |