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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / media / pci / bt8xx / bttv-input.c
blobda49c5567db5045eb33842a7cb923db1826d6db3
1 /*
2 *
3 * Copyright (c) 2003 Gerd Knorr
4 * Copyright (c) 2003 Pavel Machek
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/input.h>
24 #include <linux/slab.h>
25
26 #include "bttv.h"
27 #include "bttvp.h"
28
29
30 static int ir_debug;
31 module_param(ir_debug, int, 0644);
32
33 static int ir_rc5_remote_gap = 885;
34 module_param(ir_rc5_remote_gap, int, 0644);
35
36 #undef dprintk
37 #define dprintk(fmt, ...) \
38 do { \
39 if (ir_debug >= 1) \
40 pr_info(fmt, ##__VA_ARGS__); \
41 } while (0)
42
43 #define DEVNAME "bttv-input"
44
45 #define MODULE_NAME "bttv"
46
47 /* ---------------------------------------------------------------------- */
48
49 static void ir_handle_key(struct bttv *btv)
50 {
51 struct bttv_ir *ir = btv->remote;
52 u32 gpio,data;
53
54 /* read gpio value */
55 gpio = bttv_gpio_read(&btv->c);
56 if (ir->polling) {
57 if (ir->last_gpio == gpio)
58 return;
59 ir->last_gpio = gpio;
60 }
61
62 /* extract data */
63 data = ir_extract_bits(gpio, ir->mask_keycode);
64 dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
65 gpio, data,
66 ir->polling ? "poll" : "irq",
67 (gpio & ir->mask_keydown) ? " down" : "",
68 (gpio & ir->mask_keyup) ? " up" : "");
69
70 if ((ir->mask_keydown && (gpio & ir->mask_keydown)) ||
71 (ir->mask_keyup && !(gpio & ir->mask_keyup))) {
72 rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data, 0);
73 } else {
74 /* HACK: Probably, ir->mask_keydown is missing
75 for this board */
76 if (btv->c.type == BTTV_BOARD_WINFAST2000)
77 rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
78 0);
79
80 rc_keyup(ir->dev);
81 }
82 }
83
84 static void ir_enltv_handle_key(struct bttv *btv)
85 {
86 struct bttv_ir *ir = btv->remote;
87 u32 gpio, data, keyup;
88
89 /* read gpio value */
90 gpio = bttv_gpio_read(&btv->c);
91
92 /* extract data */
93 data = ir_extract_bits(gpio, ir->mask_keycode);
94
95 /* Check if it is keyup */
96 keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
97
98 if ((ir->last_gpio & 0x7f) != data) {
99 dprintk("gpio=0x%x code=%d | %s\n",
100 gpio, data,
101 (gpio & ir->mask_keyup) ? " up" : "up/down");
102
103 rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data, 0);
104 if (keyup)
105 rc_keyup(ir->dev);
106 } else {
107 if ((ir->last_gpio & 1 << 31) == keyup)
108 return;
109
110 dprintk("(cnt) gpio=0x%x code=%d | %s\n",
111 gpio, data,
112 (gpio & ir->mask_keyup) ? " up" : "down");
113
114 if (keyup)
115 rc_keyup(ir->dev);
116 else
117 rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
118 0);
119 }
120
121 ir->last_gpio = data | keyup;
122 }
123
124 static int bttv_rc5_irq(struct bttv *btv);
125
126 void bttv_input_irq(struct bttv *btv)
127 {
128 struct bttv_ir *ir = btv->remote;
129
130 if (ir->rc5_gpio)
131 bttv_rc5_irq(btv);
132 else if (!ir->polling)
133 ir_handle_key(btv);
134 }
135
136 static void bttv_input_timer(struct timer_list *t)
137 {
138 struct bttv_ir *ir = from_timer(ir, t, timer);
139 struct bttv *btv = ir->btv;
140
141 if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
142 ir_enltv_handle_key(btv);
143 else
144 ir_handle_key(btv);
145 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
146 }
147
148 /*
149 * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying
150 * on the rc-core way. As we need to be sure that both IRQ transitions are
151 * properly triggered, Better to touch it only with this hardware for
152 * testing.
153 */
154
155 #define RC5_START(x) (((x) >> 12) & 0x03)
156 #define RC5_TOGGLE(x) (((x) >> 11) & 0x01)
157 #define RC5_ADDR(x) (((x) >> 6) & 0x1f)
158 #define RC5_INSTR(x) (((x) >> 0) & 0x3f)
159
160 /* decode raw bit pattern to RC5 code */
161 static u32 bttv_rc5_decode(unsigned int code)
162 {
163 unsigned int org_code = code;
164 unsigned int pair;
165 unsigned int rc5 = 0;
166 int i;
167
168 for (i = 0; i < 14; ++i) {
169 pair = code & 0x3;
170 code >>= 2;
171
172 rc5 <<= 1;
173 switch (pair) {
174 case 0:
175 case 2:
176 break;
177 case 1:
178 rc5 |= 1;
179 break;
180 case 3:
181 dprintk("rc5_decode(%x) bad code\n",
182 org_code);
183 return 0;
184 }
185 }
186 dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, instr=%x\n",
187 rc5, org_code, RC5_START(rc5),
188 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
189 return rc5;
190 }
191
192 static void bttv_rc5_timer_end(struct timer_list *t)
193 {
194 struct bttv_ir *ir = from_timer(ir, t, timer);
195 ktime_t tv;
196 u32 gap, rc5, scancode;
197 u8 toggle, command, system;
198
199 /* get time */
200 tv = ktime_get();
201
202 gap = ktime_to_us(ktime_sub(tv, ir->base_time));
203 /* avoid overflow with gap >1s */
204 if (gap > USEC_PER_SEC) {
205 gap = 200000;
206 }
207 /* signal we're ready to start a new code */
208 ir->active = false;
209
210 /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
211 if (gap < 28000) {
212 dprintk("spurious timer_end\n");
213 return;
214 }
215
216 if (ir->last_bit < 20) {
217 /* ignore spurious codes (caused by light/other remotes) */
218 dprintk("short code: %x\n", ir->code);
219 return;
220 }
221
222 ir->code = (ir->code << ir->shift_by) | 1;
223 rc5 = bttv_rc5_decode(ir->code);
224
225 toggle = RC5_TOGGLE(rc5);
226 system = RC5_ADDR(rc5);
227 command = RC5_INSTR(rc5);
228
229 switch (RC5_START(rc5)) {
230 case 0x3:
231 break;
232 case 0x2:
233 command += 0x40;
234 break;
235 default:
236 return;
237 }
238
239 scancode = RC_SCANCODE_RC5(system, command);
240 rc_keydown(ir->dev, RC_PROTO_RC5, scancode, toggle);
241 dprintk("scancode %x, toggle %x\n", scancode, toggle);
242 }
243
244 static int bttv_rc5_irq(struct bttv *btv)
245 {
246 struct bttv_ir *ir = btv->remote;
247 ktime_t tv;
248 u32 gpio;
249 u32 gap;
250 unsigned long current_jiffies;
251
252 /* read gpio port */
253 gpio = bttv_gpio_read(&btv->c);
254
255 /* get time of bit */
256 current_jiffies = jiffies;
257 tv = ktime_get();
258
259 gap = ktime_to_us(ktime_sub(tv, ir->base_time));
260 /* avoid overflow with gap >1s */
261 if (gap > USEC_PER_SEC) {
262 gap = 200000;
263 }
264
265 dprintk("RC5 IRQ: gap %d us for %s\n",
266 gap, (gpio & 0x20) ? "mark" : "space");
267
268 /* remote IRQ? */
269 if (!(gpio & 0x20))
270 return 0;
271
272 /* active code => add bit */
273 if (ir->active) {
274 /* only if in the code (otherwise spurious IRQ or timer
275 late) */
276 if (ir->last_bit < 28) {
277 ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
278 ir_rc5_remote_gap;
279 ir->code |= 1 << ir->last_bit;
280 }
281 /* starting new code */
282 } else {
283 ir->active = true;
284 ir->code = 0;
285 ir->base_time = tv;
286 ir->last_bit = 0;
287
288 mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30));
289 }
290
291 /* toggle GPIO pin 4 to reset the irq */
292 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
293 bttv_gpio_write(&btv->c, gpio | (1 << 4));
294 return 1;
295 }
296
297 /* ---------------------------------------------------------------------- */
298
299 static void bttv_ir_start(struct bttv_ir *ir)
300 {
301 if (ir->polling) {
302 timer_setup(&ir->timer, bttv_input_timer, 0);
303 ir->timer.expires = jiffies + msecs_to_jiffies(1000);
304 add_timer(&ir->timer);
305 } else if (ir->rc5_gpio) {
306 /* set timer_end for code completion */
307 timer_setup(&ir->timer, bttv_rc5_timer_end, 0);
308 ir->shift_by = 1;
309 ir->rc5_remote_gap = ir_rc5_remote_gap;
310 }
311 }
312
313 static void bttv_ir_stop(struct bttv *btv)
314 {
315 if (btv->remote->polling)
316 del_timer_sync(&btv->remote->timer);
317
318 if (btv->remote->rc5_gpio) {
319 u32 gpio;
320
321 del_timer_sync(&btv->remote->timer);
322
323 gpio = bttv_gpio_read(&btv->c);
324 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
325 }
326 }
327
328 /*
329 * Get_key functions used by I2C remotes
330 */
331
332 static int get_key_pv951(struct IR_i2c *ir, enum rc_proto *protocol,
333 u32 *scancode, u8 *toggle)
334 {
335 unsigned char b;
336
337 /* poll IR chip */
338 if (1 != i2c_master_recv(ir->c, &b, 1)) {
339 dprintk("read error\n");
340 return -EIO;
341 }
342
343 /* ignore 0xaa */
344 if (b==0xaa)
345 return 0;
346 dprintk("key %02x\n", b);
347
348 /*
349 * NOTE:
350 * lirc_i2c maps the pv951 code as:
351 * addr = 0x61D6
352 * cmd = bit_reverse (b)
353 * So, it seems that this device uses NEC extended
354 * I decided to not fix the table, due to two reasons:
355 * 1) Without the actual device, this is only a guess;
356 * 2) As the addr is not reported via I2C, nor can be changed,
357 * the device is bound to the vendor-provided RC.
358 */
359
360 *protocol = RC_PROTO_UNKNOWN;
361 *scancode = b;
362 *toggle = 0;
363 return 1;
364 }
365
366 /* Instantiate the I2C IR receiver device, if present */
367 void init_bttv_i2c_ir(struct bttv *btv)
368 {
369 const unsigned short addr_list[] = {
370 0x1a, 0x18, 0x64, 0x30, 0x71,
371 I2C_CLIENT_END
372 };
373 struct i2c_board_info info;
374 struct i2c_client *i2c_dev;
375
376 if (0 != btv->i2c_rc)
377 return;
378
379 memset(&info, 0, sizeof(struct i2c_board_info));
380 memset(&btv->init_data, 0, sizeof(btv->init_data));
381 strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
382
383 switch (btv->c.type) {
384 case BTTV_BOARD_PV951:
385 btv->init_data.name = "PV951";
386 btv->init_data.get_key = get_key_pv951;
387 btv->init_data.ir_codes = RC_MAP_PV951;
388 info.addr = 0x4b;
389 break;
390 }
391
392 if (btv->init_data.name) {
393 info.platform_data = &btv->init_data;
394 i2c_dev = i2c_new_device(&btv->c.i2c_adap, &info);
395 } else {
396 /*
397 * The external IR receiver is at i2c address 0x34 (0x35 for
398 * reads). Future Hauppauge cards will have an internal
399 * receiver at 0x30 (0x31 for reads). In theory, both can be
400 * fitted, and Hauppauge suggest an external overrides an
401 * internal.
402 * That's why we probe 0x1a (~0x34) first. CB
403 */
404 i2c_dev = i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
405 }
406 if (NULL == i2c_dev)
407 return;
408
409 #if defined(CONFIG_MODULES) && defined(MODULE)
410 request_module("ir-kbd-i2c");
411 #endif
412 }
413
414 int bttv_input_init(struct bttv *btv)
415 {
416 struct bttv_ir *ir;
417 char *ir_codes = NULL;
418 struct rc_dev *rc;
419 int err = -ENOMEM;
420
421 if (!btv->has_remote)
422 return -ENODEV;
423
424 ir = kzalloc(sizeof(*ir),GFP_KERNEL);
425 rc = rc_allocate_device(RC_DRIVER_SCANCODE);
426 if (!ir || !rc)
427 goto err_out_free;
428
429 /* detect & configure */
430 switch (btv->c.type) {
431 case BTTV_BOARD_AVERMEDIA:
432 case BTTV_BOARD_AVPHONE98:
433 case BTTV_BOARD_AVERMEDIA98:
434 ir_codes = RC_MAP_AVERMEDIA;
435 ir->mask_keycode = 0xf88000;
436 ir->mask_keydown = 0x010000;
437 ir->polling = 50; // ms
438 break;
439
440 case BTTV_BOARD_AVDVBT_761:
441 case BTTV_BOARD_AVDVBT_771:
442 ir_codes = RC_MAP_AVERMEDIA_DVBT;
443 ir->mask_keycode = 0x0f00c0;
444 ir->mask_keydown = 0x000020;
445 ir->polling = 50; // ms
446 break;
447
448 case BTTV_BOARD_PXELVWPLTVPAK:
449 ir_codes = RC_MAP_PIXELVIEW;
450 ir->mask_keycode = 0x003e00;
451 ir->mask_keyup = 0x010000;
452 ir->polling = 50; // ms
453 break;
454 case BTTV_BOARD_PV_M4900:
455 case BTTV_BOARD_PV_BT878P_9B:
456 case BTTV_BOARD_PV_BT878P_PLUS:
457 ir_codes = RC_MAP_PIXELVIEW;
458 ir->mask_keycode = 0x001f00;
459 ir->mask_keyup = 0x008000;
460 ir->polling = 50; // ms
461 break;
462
463 case BTTV_BOARD_WINFAST2000:
464 ir_codes = RC_MAP_WINFAST;
465 ir->mask_keycode = 0x1f8;
466 break;
467 case BTTV_BOARD_MAGICTVIEW061:
468 case BTTV_BOARD_MAGICTVIEW063:
469 ir_codes = RC_MAP_WINFAST;
470 ir->mask_keycode = 0x0008e000;
471 ir->mask_keydown = 0x00200000;
472 break;
473 case BTTV_BOARD_APAC_VIEWCOMP:
474 ir_codes = RC_MAP_APAC_VIEWCOMP;
475 ir->mask_keycode = 0x001f00;
476 ir->mask_keyup = 0x008000;
477 ir->polling = 50; // ms
478 break;
479 case BTTV_BOARD_ASKEY_CPH03X:
480 case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
481 case BTTV_BOARD_CONTVFMI:
482 case BTTV_BOARD_KWORLD_VSTREAM_XPERT:
483 ir_codes = RC_MAP_PIXELVIEW;
484 ir->mask_keycode = 0x001F00;
485 ir->mask_keyup = 0x006000;
486 ir->polling = 50; // ms
487 break;
488 case BTTV_BOARD_NEBULA_DIGITV:
489 ir_codes = RC_MAP_NEBULA;
490 ir->rc5_gpio = true;
491 break;
492 case BTTV_BOARD_MACHTV_MAGICTV:
493 ir_codes = RC_MAP_APAC_VIEWCOMP;
494 ir->mask_keycode = 0x001F00;
495 ir->mask_keyup = 0x004000;
496 ir->polling = 50; /* ms */
497 break;
498 case BTTV_BOARD_KOZUMI_KTV_01C:
499 ir_codes = RC_MAP_PCTV_SEDNA;
500 ir->mask_keycode = 0x001f00;
501 ir->mask_keyup = 0x006000;
502 ir->polling = 50; /* ms */
503 break;
504 case BTTV_BOARD_ENLTV_FM_2:
505 ir_codes = RC_MAP_ENCORE_ENLTV2;
506 ir->mask_keycode = 0x00fd00;
507 ir->mask_keyup = 0x000080;
508 ir->polling = 1; /* ms */
509 ir->last_gpio = ir_extract_bits(bttv_gpio_read(&btv->c),
510 ir->mask_keycode);
511 break;
512 }
513
514 if (!ir_codes) {
515 dprintk("Ooops: IR config error [card=%d]\n", btv->c.type);
516 err = -ENODEV;
517 goto err_out_free;
518 }
519
520 if (ir->rc5_gpio) {
521 u32 gpio;
522 /* enable remote irq */
523 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
524 gpio = bttv_gpio_read(&btv->c);
525 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
526 bttv_gpio_write(&btv->c, gpio | (1 << 4));
527 } else {
528 /* init hardware-specific stuff */
529 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
530 }
531
532 /* init input device */
533 ir->dev = rc;
534 ir->btv = btv;
535
536 snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
537 btv->c.type);
538 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
539 pci_name(btv->c.pci));
540
541 rc->device_name = ir->name;
542 rc->input_phys = ir->phys;
543 rc->input_id.bustype = BUS_PCI;
544 rc->input_id.version = 1;
545 if (btv->c.pci->subsystem_vendor) {
546 rc->input_id.vendor = btv->c.pci->subsystem_vendor;
547 rc->input_id.product = btv->c.pci->subsystem_device;
548 } else {
549 rc->input_id.vendor = btv->c.pci->vendor;
550 rc->input_id.product = btv->c.pci->device;
551 }
552 rc->dev.parent = &btv->c.pci->dev;
553 rc->map_name = ir_codes;
554 rc->driver_name = MODULE_NAME;
555
556 btv->remote = ir;
557 bttv_ir_start(ir);
558
559 /* all done */
560 err = rc_register_device(rc);
561 if (err)
562 goto err_out_stop;
563
564 return 0;
565
566 err_out_stop:
567 bttv_ir_stop(btv);
568 btv->remote = NULL;
569 err_out_free:
570 rc_free_device(rc);
571 kfree(ir);
572 return err;
573 }
574
575 void bttv_input_fini(struct bttv *btv)
576 {
577 if (btv->remote == NULL)
578 return;
579
580 bttv_ir_stop(btv);
581 rc_unregister_device(btv->remote->dev);
582 kfree(btv->remote);
583 btv->remote = NULL;
584 }
CRIS linux kernel tree