?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / pci / bt8xx / bttv-input.c
blobf36821367d8d708c24294234a4b58038486476cc
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 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/input.h>
28 #include <linux/slab.h>
29
30 #include "bttv.h"
31 #include "bttvp.h"
32
33
34 static int ir_debug;
35 module_param(ir_debug, int, 0644);
36
37 static int ir_rc5_remote_gap = 885;
38 module_param(ir_rc5_remote_gap, int, 0644);
39
40 #undef dprintk
41 #define dprintk(fmt, ...) \
42 do { \
43 if (ir_debug >= 1) \
44 pr_info(fmt, ##__VA_ARGS__); \
45 } while (0)
46
47 #define DEVNAME "bttv-input"
48
49 #define MODULE_NAME "bttv"
50
51 /* ---------------------------------------------------------------------- */
52
53 static void ir_handle_key(struct bttv *btv)
54 {
55 struct bttv_ir *ir = btv->remote;
56 u32 gpio,data;
57
58 /* read gpio value */
59 gpio = bttv_gpio_read(&btv->c);
60 if (ir->polling) {
61 if (ir->last_gpio == gpio)
62 return;
63 ir->last_gpio = gpio;
64 }
65
66 /* extract data */
67 data = ir_extract_bits(gpio, ir->mask_keycode);
68 dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
69 gpio, data,
70 ir->polling ? "poll" : "irq",
71 (gpio & ir->mask_keydown) ? " down" : "",
72 (gpio & ir->mask_keyup) ? " up" : "");
73
74 if ((ir->mask_keydown && (gpio & ir->mask_keydown)) ||
75 (ir->mask_keyup && !(gpio & ir->mask_keyup))) {
76 rc_keydown_notimeout(ir->dev, data, 0);
77 } else {
78 /* HACK: Probably, ir->mask_keydown is missing
79 for this board */
80 if (btv->c.type == BTTV_BOARD_WINFAST2000)
81 rc_keydown_notimeout(ir->dev, data, 0);
82
83 rc_keyup(ir->dev);
84 }
85 }
86
87 static void ir_enltv_handle_key(struct bttv *btv)
88 {
89 struct bttv_ir *ir = btv->remote;
90 u32 gpio, data, keyup;
91
92 /* read gpio value */
93 gpio = bttv_gpio_read(&btv->c);
94
95 /* extract data */
96 data = ir_extract_bits(gpio, ir->mask_keycode);
97
98 /* Check if it is keyup */
99 keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
100
101 if ((ir->last_gpio & 0x7f) != data) {
102 dprintk("gpio=0x%x code=%d | %s\n",
103 gpio, data,
104 (gpio & ir->mask_keyup) ? " up" : "up/down");
105
106 rc_keydown_notimeout(ir->dev, data, 0);
107 if (keyup)
108 rc_keyup(ir->dev);
109 } else {
110 if ((ir->last_gpio & 1 << 31) == keyup)
111 return;
112
113 dprintk("(cnt) gpio=0x%x code=%d | %s\n",
114 gpio, data,
115 (gpio & ir->mask_keyup) ? " up" : "down");
116
117 if (keyup)
118 rc_keyup(ir->dev);
119 else
120 rc_keydown_notimeout(ir->dev, data, 0);
121 }
122
123 ir->last_gpio = data | keyup;
124 }
125
126 static int bttv_rc5_irq(struct bttv *btv);
127
128 void bttv_input_irq(struct bttv *btv)
129 {
130 struct bttv_ir *ir = btv->remote;
131
132 if (ir->rc5_gpio)
133 bttv_rc5_irq(btv);
134 else if (!ir->polling)
135 ir_handle_key(btv);
136 }
137
138 static void bttv_input_timer(unsigned long data)
139 {
140 struct bttv *btv = (struct bttv*)data;
141 struct bttv_ir *ir = btv->remote;
142
143 if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
144 ir_enltv_handle_key(btv);
145 else
146 ir_handle_key(btv);
147 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
148 }
149
150 /*
151 * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying
152 * on the rc-core way. As we need to be sure that both IRQ transitions are
153 * properly triggered, Better to touch it only with this hardware for
154 * testing.
155 */
156
157 #define RC5_START(x) (((x) >> 12) & 3)
158 #define RC5_TOGGLE(x) (((x) >> 11) & 1)
159 #define RC5_ADDR(x) (((x) >> 6) & 31)
160 #define RC5_INSTR(x) ((x) & 63)
161
162 /* decode raw bit pattern to RC5 code */
163 static u32 bttv_rc5_decode(unsigned int code)
164 {
165 unsigned int org_code = code;
166 unsigned int pair;
167 unsigned int rc5 = 0;
168 int i;
169
170 for (i = 0; i < 14; ++i) {
171 pair = code & 0x3;
172 code >>= 2;
173
174 rc5 <<= 1;
175 switch (pair) {
176 case 0:
177 case 2:
178 break;
179 case 1:
180 rc5 |= 1;
181 break;
182 case 3:
183 dprintk("rc5_decode(%x) bad code\n",
184 org_code);
185 return 0;
186 }
187 }
188 dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
189 "instr=%x\n", rc5, org_code, RC5_START(rc5),
190 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
191 return rc5;
192 }
193
194 static void bttv_rc5_timer_end(unsigned long data)
195 {
196 struct bttv_ir *ir = (struct bttv_ir *)data;
197 struct timeval tv;
198 u32 gap;
199 u32 rc5 = 0;
200
201 /* get time */
202 do_gettimeofday(&tv);
203
204 /* avoid overflow with gap >1s */
205 if (tv.tv_sec - ir->base_time.tv_sec > 1) {
206 gap = 200000;
207 } else {
208 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
209 tv.tv_usec - ir->base_time.tv_usec;
210 }
211
212 /* signal we're ready to start a new code */
213 ir->active = false;
214
215 /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
216 if (gap < 28000) {
217 dprintk("spurious timer_end\n");
218 return;
219 }
220
221 if (ir->last_bit < 20) {
222 /* ignore spurious codes (caused by light/other remotes) */
223 dprintk("short code: %x\n", ir->code);
224 } else {
225 ir->code = (ir->code << ir->shift_by) | 1;
226 rc5 = bttv_rc5_decode(ir->code);
227
228 /* two start bits? */
229 if (RC5_START(rc5) != ir->start) {
230 pr_info(DEVNAME ":"
231 " rc5 start bits invalid: %u\n", RC5_START(rc5));
232
233 /* right address? */
234 } else if (RC5_ADDR(rc5) == ir->addr) {
235 u32 toggle = RC5_TOGGLE(rc5);
236 u32 instr = RC5_INSTR(rc5);
237
238 /* Good code */
239 rc_keydown(ir->dev, instr, toggle);
240 dprintk("instruction %x, toggle %x\n",
241 instr, toggle);
242 }
243 }
244 }
245
246 static int bttv_rc5_irq(struct bttv *btv)
247 {
248 struct bttv_ir *ir = btv->remote;
249 struct timeval tv;
250 u32 gpio;
251 u32 gap;
252 unsigned long current_jiffies;
253
254 /* read gpio port */
255 gpio = bttv_gpio_read(&btv->c);
256
257 /* get time of bit */
258 current_jiffies = jiffies;
259 do_gettimeofday(&tv);
260
261 /* avoid overflow with gap >1s */
262 if (tv.tv_sec - ir->base_time.tv_sec > 1) {
263 gap = 200000;
264 } else {
265 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
266 tv.tv_usec - ir->base_time.tv_usec;
267 }
268
269 dprintk("RC5 IRQ: gap %d us for %s\n",
270 gap, (gpio & 0x20) ? "mark" : "space");
271
272 /* remote IRQ? */
273 if (!(gpio & 0x20))
274 return 0;
275
276 /* active code => add bit */
277 if (ir->active) {
278 /* only if in the code (otherwise spurious IRQ or timer
279 late) */
280 if (ir->last_bit < 28) {
281 ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
282 ir_rc5_remote_gap;
283 ir->code |= 1 << ir->last_bit;
284 }
285 /* starting new code */
286 } else {
287 ir->active = true;
288 ir->code = 0;
289 ir->base_time = tv;
290 ir->last_bit = 0;
291
292 mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30));
293 }
294
295 /* toggle GPIO pin 4 to reset the irq */
296 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
297 bttv_gpio_write(&btv->c, gpio | (1 << 4));
298 return 1;
299 }
300
301 /* ---------------------------------------------------------------------- */
302
303 static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir)
304 {
305 if (ir->polling) {
306 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
307 ir->timer.expires = jiffies + msecs_to_jiffies(1000);
308 add_timer(&ir->timer);
309 } else if (ir->rc5_gpio) {
310 /* set timer_end for code completion */
311 setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir);
312 ir->shift_by = 1;
313 ir->start = 3;
314 ir->addr = 0x0;
315 ir->rc5_remote_gap = ir_rc5_remote_gap;
316 }
317 }
318
319 static void bttv_ir_stop(struct bttv *btv)
320 {
321 if (btv->remote->polling)
322 del_timer_sync(&btv->remote->timer);
323
324 if (btv->remote->rc5_gpio) {
325 u32 gpio;
326
327 del_timer_sync(&btv->remote->timer);
328
329 gpio = bttv_gpio_read(&btv->c);
330 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
331 }
332 }
333
334 /*
335 * Get_key functions used by I2C remotes
336 */
337
338 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
339 {
340 unsigned char b;
341
342 /* poll IR chip */
343 if (1 != i2c_master_recv(ir->c, &b, 1)) {
344 dprintk("read error\n");
345 return -EIO;
346 }
347
348 /* ignore 0xaa */
349 if (b==0xaa)
350 return 0;
351 dprintk("key %02x\n", b);
352
353 /*
354 * NOTE:
355 * lirc_i2c maps the pv951 code as:
356 * addr = 0x61D6
357 * cmd = bit_reverse (b)
358 * So, it seems that this device uses NEC extended
359 * I decided to not fix the table, due to two reasons:
360 * 1) Without the actual device, this is only a guess;
361 * 2) As the addr is not reported via I2C, nor can be changed,
362 * the device is bound to the vendor-provided RC.
363 */
364
365 *ir_key = b;
366 *ir_raw = b;
367 return 1;
368 }
369
370 /* Instantiate the I2C IR receiver device, if present */
371 void init_bttv_i2c_ir(struct bttv *btv)
372 {
373 const unsigned short addr_list[] = {
374 0x1a, 0x18, 0x64, 0x30, 0x71,
375 I2C_CLIENT_END
376 };
377 struct i2c_board_info info;
378 struct i2c_client *i2c_dev;
379
380 if (0 != btv->i2c_rc)
381 return;
382
383 memset(&info, 0, sizeof(struct i2c_board_info));
384 memset(&btv->init_data, 0, sizeof(btv->init_data));
385 strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
386
387 switch (btv->c.type) {
388 case BTTV_BOARD_PV951:
389 btv->init_data.name = "PV951";
390 btv->init_data.get_key = get_key_pv951;
391 btv->init_data.ir_codes = RC_MAP_PV951;
392 info.addr = 0x4b;
393 break;
394 }
395
396 if (btv->init_data.name) {
397 info.platform_data = &btv->init_data;
398 i2c_dev = i2c_new_device(&btv->c.i2c_adap, &info);
399 } else {
400 /*
401 * The external IR receiver is at i2c address 0x34 (0x35 for
402 * reads). Future Hauppauge cards will have an internal
403 * receiver at 0x30 (0x31 for reads). In theory, both can be
404 * fitted, and Hauppauge suggest an external overrides an
405 * internal.
406 * That's why we probe 0x1a (~0x34) first. CB
407 */
408 i2c_dev = i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
409 }
410 if (NULL == i2c_dev)
411 return;
412
413 #if defined(CONFIG_MODULES) && defined(MODULE)
414 request_module("ir-kbd-i2c");
415 #endif
416 }
417
418 int bttv_input_init(struct bttv *btv)
419 {
420 struct bttv_ir *ir;
421 char *ir_codes = NULL;
422 struct rc_dev *rc;
423 int err = -ENOMEM;
424
425 if (!btv->has_remote)
426 return -ENODEV;
427
428 ir = kzalloc(sizeof(*ir),GFP_KERNEL);
429 rc = rc_allocate_device();
430 if (!ir || !rc)
431 goto err_out_free;
432
433 /* detect & configure */
434 switch (btv->c.type) {
435 case BTTV_BOARD_AVERMEDIA:
436 case BTTV_BOARD_AVPHONE98:
437 case BTTV_BOARD_AVERMEDIA98:
438 ir_codes = RC_MAP_AVERMEDIA;
439 ir->mask_keycode = 0xf88000;
440 ir->mask_keydown = 0x010000;
441 ir->polling = 50; // ms
442 break;
443
444 case BTTV_BOARD_AVDVBT_761:
445 case BTTV_BOARD_AVDVBT_771:
446 ir_codes = RC_MAP_AVERMEDIA_DVBT;
447 ir->mask_keycode = 0x0f00c0;
448 ir->mask_keydown = 0x000020;
449 ir->polling = 50; // ms
450 break;
451
452 case BTTV_BOARD_PXELVWPLTVPAK:
453 ir_codes = RC_MAP_PIXELVIEW;
454 ir->mask_keycode = 0x003e00;
455 ir->mask_keyup = 0x010000;
456 ir->polling = 50; // ms
457 break;
458 case BTTV_BOARD_PV_M4900:
459 case BTTV_BOARD_PV_BT878P_9B:
460 case BTTV_BOARD_PV_BT878P_PLUS:
461 ir_codes = RC_MAP_PIXELVIEW;
462 ir->mask_keycode = 0x001f00;
463 ir->mask_keyup = 0x008000;
464 ir->polling = 50; // ms
465 break;
466
467 case BTTV_BOARD_WINFAST2000:
468 ir_codes = RC_MAP_WINFAST;
469 ir->mask_keycode = 0x1f8;
470 break;
471 case BTTV_BOARD_MAGICTVIEW061:
472 case BTTV_BOARD_MAGICTVIEW063:
473 ir_codes = RC_MAP_WINFAST;
474 ir->mask_keycode = 0x0008e000;
475 ir->mask_keydown = 0x00200000;
476 break;
477 case BTTV_BOARD_APAC_VIEWCOMP:
478 ir_codes = RC_MAP_APAC_VIEWCOMP;
479 ir->mask_keycode = 0x001f00;
480 ir->mask_keyup = 0x008000;
481 ir->polling = 50; // ms
482 break;
483 case BTTV_BOARD_ASKEY_CPH03X:
484 case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
485 case BTTV_BOARD_CONTVFMI:
486 ir_codes = RC_MAP_PIXELVIEW;
487 ir->mask_keycode = 0x001F00;
488 ir->mask_keyup = 0x006000;
489 ir->polling = 50; // ms
490 break;
491 case BTTV_BOARD_NEBULA_DIGITV:
492 ir_codes = RC_MAP_NEBULA;
493 ir->rc5_gpio = true;
494 break;
495 case BTTV_BOARD_MACHTV_MAGICTV:
496 ir_codes = RC_MAP_APAC_VIEWCOMP;
497 ir->mask_keycode = 0x001F00;
498 ir->mask_keyup = 0x004000;
499 ir->polling = 50; /* ms */
500 break;
501 case BTTV_BOARD_KOZUMI_KTV_01C:
502 ir_codes = RC_MAP_PCTV_SEDNA;
503 ir->mask_keycode = 0x001f00;
504 ir->mask_keyup = 0x006000;
505 ir->polling = 50; /* ms */
506 break;
507 case BTTV_BOARD_ENLTV_FM_2:
508 ir_codes = RC_MAP_ENCORE_ENLTV2;
509 ir->mask_keycode = 0x00fd00;
510 ir->mask_keyup = 0x000080;
511 ir->polling = 1; /* ms */
512 ir->last_gpio = ir_extract_bits(bttv_gpio_read(&btv->c),
513 ir->mask_keycode);
514 break;
515 }
516 if (NULL == ir_codes) {
517 dprintk("Ooops: IR config error [card=%d]\n", btv->c.type);
518 err = -ENODEV;
519 goto err_out_free;
520 }
521
522 if (ir->rc5_gpio) {
523 u32 gpio;
524 /* enable remote irq */
525 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
526 gpio = bttv_gpio_read(&btv->c);
527 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
528 bttv_gpio_write(&btv->c, gpio | (1 << 4));
529 } else {
530 /* init hardware-specific stuff */
531 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
532 }
533
534 /* init input device */
535 ir->dev = rc;
536
537 snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
538 btv->c.type);
539 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
540 pci_name(btv->c.pci));
541
542 rc->input_name = ir->name;
543 rc->input_phys = ir->phys;
544 rc->input_id.bustype = BUS_PCI;
545 rc->input_id.version = 1;
546 if (btv->c.pci->subsystem_vendor) {
547 rc->input_id.vendor = btv->c.pci->subsystem_vendor;
548 rc->input_id.product = btv->c.pci->subsystem_device;
549 } else {
550 rc->input_id.vendor = btv->c.pci->vendor;
551 rc->input_id.product = btv->c.pci->device;
552 }
553 rc->dev.parent = &btv->c.pci->dev;
554 rc->map_name = ir_codes;
555 rc->driver_name = MODULE_NAME;
556
557 btv->remote = ir;
558 bttv_ir_start(btv, ir);
559
560 /* all done */
561 err = rc_register_device(rc);
562 if (err)
563 goto err_out_stop;
564
565 return 0;
566
567 err_out_stop:
568 bttv_ir_stop(btv);
569 btv->remote = NULL;
570 err_out_free:
571 rc_free_device(rc);
572 kfree(ir);
573 return err;
574 }
575
576 void bttv_input_fini(struct bttv *btv)
577 {
578 if (btv->remote == NULL)
579 return;
580
581 bttv_ir_stop(btv);
582 rc_unregister_device(btv->remote->dev);
583 kfree(btv->remote);
584 btv->remote = NULL;
585 }
Linux with added FPC-III support