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12#include <linux/delay.h>
13#include <linux/errno.h>
14#include <linux/fs.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/major.h>
18#include <linux/module.h>
19#include <linux/mm.h>
20#include <linux/slab.h>
21
22#include <linux/videodev2.h>
23#include <linux/i2c.h>
24#include <media/v4l2-device.h>
25#include <media/v4l2-chip-ident.h>
26
27#include "saa7191.h"
28
29#define SAA7191_MODULE_VERSION "0.0.5"
30
31MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
32MODULE_VERSION(SAA7191_MODULE_VERSION);
33MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
34MODULE_LICENSE("GPL");
35
36
37
38
39#ifdef SAA7191_DEBUG
40#define dprintk(x...) printk("SAA7191: " x);
41#else
42#define dprintk(x...)
43#endif
44
45#define SAA7191_SYNC_COUNT 30
46#define SAA7191_SYNC_DELAY 100
47
48struct saa7191 {
49 struct v4l2_subdev sd;
50
51
52
53 u8 reg[25];
54
55 int input;
56 v4l2_std_id norm;
57};
58
59static inline struct saa7191 *to_saa7191(struct v4l2_subdev *sd)
60{
61 return container_of(sd, struct saa7191, sd);
62}
63
64static const u8 initseq[] = {
65 0,
66
67 0x50,
68
69
70 0x30,
71 0x00,
72 0xe8,
73 0xb6,
74 0xf4,
75
76
77 SAA7191_LUMA_APER_1,
78 0x00,
79 0xf8,
80 0xf8,
81 0x90,
82 0x90,
83 0x00,
84 SAA7191_STDC_NFEN | SAA7191_STDC_HRMV,
85
86
87 SAA7191_IOCK_OEDC | SAA7191_IOCK_OEHS | SAA7191_IOCK_OEVS
88 | SAA7191_IOCK_OEDY,
89
90 SAA7191_CTL3_AUFD | SAA7191_CTL3_SCEN | SAA7191_CTL3_OFTS
91 | SAA7191_CTL3_YDEL0,
92
93 0x00,
94 0x2c,
95 0x00,
96 0x00,
97
98
99 0x34,
100 0x0a,
101 0xf4,
102 0xce,
103 0xf4,
104};
105
106
107
108static u8 saa7191_read_reg(struct v4l2_subdev *sd, u8 reg)
109{
110 return to_saa7191(sd)->reg[reg];
111}
112
113static int saa7191_read_status(struct v4l2_subdev *sd, u8 *value)
114{
115 struct i2c_client *client = v4l2_get_subdevdata(sd);
116 int ret;
117
118 ret = i2c_master_recv(client, value, 1);
119 if (ret < 0) {
120 printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed\n");
121 return ret;
122 }
123
124 return 0;
125}
126
127
128static int saa7191_write_reg(struct v4l2_subdev *sd, u8 reg, u8 value)
129{
130 struct i2c_client *client = v4l2_get_subdevdata(sd);
131
132 to_saa7191(sd)->reg[reg] = value;
133 return i2c_smbus_write_byte_data(client, reg, value);
134}
135
136
137static int saa7191_write_block(struct v4l2_subdev *sd,
138 u8 length, const u8 *data)
139{
140 struct i2c_client *client = v4l2_get_subdevdata(sd);
141 struct saa7191 *decoder = to_saa7191(sd);
142 int i;
143 int ret;
144
145 for (i = 0; i < (length - 1); i++) {
146 decoder->reg[data[0] + i] = data[i + 1];
147 }
148
149 ret = i2c_master_send(client, data, length);
150 if (ret < 0) {
151 printk(KERN_ERR "SAA7191: saa7191_write_block(): "
152 "write failed\n");
153 return ret;
154 }
155
156 return 0;
157}
158
159
160
161static int saa7191_s_routing(struct v4l2_subdev *sd,
162 u32 input, u32 output, u32 config)
163{
164 struct saa7191 *decoder = to_saa7191(sd);
165 u8 luma = saa7191_read_reg(sd, SAA7191_REG_LUMA);
166 u8 iock = saa7191_read_reg(sd, SAA7191_REG_IOCK);
167 int err;
168
169 switch (input) {
170 case SAA7191_INPUT_COMPOSITE:
171 iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1
172 | SAA7191_IOCK_GPSW2);
173
174 luma &= ~SAA7191_LUMA_BYPS;
175 break;
176 case SAA7191_INPUT_SVIDEO:
177 iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2;
178
179 luma |= SAA7191_LUMA_BYPS;
180 break;
181 default:
182 return -EINVAL;
183 }
184
185 err = saa7191_write_reg(sd, SAA7191_REG_LUMA, luma);
186 if (err)
187 return -EIO;
188 err = saa7191_write_reg(sd, SAA7191_REG_IOCK, iock);
189 if (err)
190 return -EIO;
191
192 decoder->input = input;
193
194 return 0;
195}
196
197static int saa7191_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
198{
199 struct saa7191 *decoder = to_saa7191(sd);
200 u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC);
201 u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3);
202 u8 chcv = saa7191_read_reg(sd, SAA7191_REG_CHCV);
203 int err;
204
205 if (norm & V4L2_STD_PAL) {
206 stdc &= ~SAA7191_STDC_SECS;
207 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
208 chcv = SAA7191_CHCV_PAL;
209 } else if (norm & V4L2_STD_NTSC) {
210 stdc &= ~SAA7191_STDC_SECS;
211 ctl3 &= ~SAA7191_CTL3_AUFD;
212 ctl3 |= SAA7191_CTL3_FSEL;
213 chcv = SAA7191_CHCV_NTSC;
214 } else if (norm & V4L2_STD_SECAM) {
215 stdc |= SAA7191_STDC_SECS;
216 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
217 chcv = SAA7191_CHCV_PAL;
218 } else {
219 return -EINVAL;
220 }
221
222 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
223 if (err)
224 return -EIO;
225 err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc);
226 if (err)
227 return -EIO;
228 err = saa7191_write_reg(sd, SAA7191_REG_CHCV, chcv);
229 if (err)
230 return -EIO;
231
232 decoder->norm = norm;
233
234 dprintk("ctl3: %02x stdc: %02x chcv: %02x\n", ctl3,
235 stdc, chcv);
236 dprintk("norm: %llx\n", norm);
237
238 return 0;
239}
240
241static int saa7191_wait_for_signal(struct v4l2_subdev *sd, u8 *status)
242{
243 int i = 0;
244
245 dprintk("Checking for signal...\n");
246
247 for (i = 0; i < SAA7191_SYNC_COUNT; i++) {
248 if (saa7191_read_status(sd, status))
249 return -EIO;
250
251 if (((*status) & SAA7191_STATUS_HLCK) == 0) {
252 dprintk("Signal found\n");
253 return 0;
254 }
255
256 msleep(SAA7191_SYNC_DELAY);
257 }
258
259 dprintk("No signal\n");
260
261 return -EBUSY;
262}
263
264static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
265{
266 struct saa7191 *decoder = to_saa7191(sd);
267 u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC);
268 u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3);
269 u8 status;
270 v4l2_std_id old_norm = decoder->norm;
271 int err = 0;
272
273 dprintk("SAA7191 extended signal auto-detection...\n");
274
275 *norm = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
276 stdc &= ~SAA7191_STDC_SECS;
277 ctl3 &= ~(SAA7191_CTL3_FSEL);
278
279 err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc);
280 if (err) {
281 err = -EIO;
282 goto out;
283 }
284 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
285 if (err) {
286 err = -EIO;
287 goto out;
288 }
289
290 ctl3 |= SAA7191_CTL3_AUFD;
291 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
292 if (err) {
293 err = -EIO;
294 goto out;
295 }
296
297 msleep(SAA7191_SYNC_DELAY);
298
299 err = saa7191_wait_for_signal(sd, &status);
300 if (err)
301 goto out;
302
303 if (status & SAA7191_STATUS_FIDT) {
304
305 dprintk("60Hz signal: NTSC\n");
306 *norm = V4L2_STD_NTSC;
307 return 0;
308 }
309
310
311 dprintk("50Hz signal: Trying PAL...\n");
312
313
314 err = saa7191_s_std(sd, V4L2_STD_PAL);
315 if (err)
316 goto out;
317
318 msleep(SAA7191_SYNC_DELAY);
319
320 err = saa7191_wait_for_signal(sd, &status);
321 if (err)
322 goto out;
323
324
325 if (status & SAA7191_STATUS_FIDT) {
326 dprintk("No 50Hz signal\n");
327 saa7191_s_std(sd, old_norm);
328 return -EAGAIN;
329 }
330
331 if (status & SAA7191_STATUS_CODE) {
332 dprintk("PAL\n");
333 *norm = V4L2_STD_PAL;
334 return saa7191_s_std(sd, old_norm);
335 }
336
337 dprintk("No color detected with PAL - Trying SECAM...\n");
338
339
340 err = saa7191_s_std(sd, V4L2_STD_SECAM);
341 if (err)
342 goto out;
343
344 msleep(SAA7191_SYNC_DELAY);
345
346 err = saa7191_wait_for_signal(sd, &status);
347 if (err)
348 goto out;
349
350
351 if (status & SAA7191_STATUS_FIDT) {
352 dprintk("No 50Hz signal\n");
353 err = -EAGAIN;
354 goto out;
355 }
356
357 if (status & SAA7191_STATUS_CODE) {
358
359 dprintk("SECAM\n");
360 *norm = V4L2_STD_SECAM;
361 return saa7191_s_std(sd, old_norm);
362 }
363
364 dprintk("No color detected with SECAM - Going back to PAL.\n");
365
366out:
367 return saa7191_s_std(sd, old_norm);
368}
369
370static int saa7191_autodetect_norm(struct v4l2_subdev *sd)
371{
372 u8 status;
373
374 dprintk("SAA7191 signal auto-detection...\n");
375
376 dprintk("Reading status...\n");
377
378 if (saa7191_read_status(sd, &status))
379 return -EIO;
380
381 dprintk("Checking for signal...\n");
382
383
384 if (status & SAA7191_STATUS_HLCK) {
385 dprintk("No signal\n");
386 return -EBUSY;
387 }
388
389 dprintk("Signal found\n");
390
391 if (status & SAA7191_STATUS_FIDT) {
392
393 dprintk("NTSC\n");
394 return saa7191_s_std(sd, V4L2_STD_NTSC);
395 } else {
396
397 dprintk("PAL\n");
398 return saa7191_s_std(sd, V4L2_STD_PAL);
399 }
400}
401
402static int saa7191_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
403{
404 u8 reg;
405 int ret = 0;
406
407 switch (ctrl->id) {
408 case SAA7191_CONTROL_BANDPASS:
409 case SAA7191_CONTROL_BANDPASS_WEIGHT:
410 case SAA7191_CONTROL_CORING:
411 reg = saa7191_read_reg(sd, SAA7191_REG_LUMA);
412 switch (ctrl->id) {
413 case SAA7191_CONTROL_BANDPASS:
414 ctrl->value = ((s32)reg & SAA7191_LUMA_BPSS_MASK)
415 >> SAA7191_LUMA_BPSS_SHIFT;
416 break;
417 case SAA7191_CONTROL_BANDPASS_WEIGHT:
418 ctrl->value = ((s32)reg & SAA7191_LUMA_APER_MASK)
419 >> SAA7191_LUMA_APER_SHIFT;
420 break;
421 case SAA7191_CONTROL_CORING:
422 ctrl->value = ((s32)reg & SAA7191_LUMA_CORI_MASK)
423 >> SAA7191_LUMA_CORI_SHIFT;
424 break;
425 }
426 break;
427 case SAA7191_CONTROL_FORCE_COLOUR:
428 case SAA7191_CONTROL_CHROMA_GAIN:
429 reg = saa7191_read_reg(sd, SAA7191_REG_GAIN);
430 if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR)
431 ctrl->value = ((s32)reg & SAA7191_GAIN_COLO) ? 1 : 0;
432 else
433 ctrl->value = ((s32)reg & SAA7191_GAIN_LFIS_MASK)
434 >> SAA7191_GAIN_LFIS_SHIFT;
435 break;
436 case V4L2_CID_HUE:
437 reg = saa7191_read_reg(sd, SAA7191_REG_HUEC);
438 if (reg < 0x80)
439 reg += 0x80;
440 else
441 reg -= 0x80;
442 ctrl->value = (s32)reg;
443 break;
444 case SAA7191_CONTROL_VTRC:
445 reg = saa7191_read_reg(sd, SAA7191_REG_STDC);
446 ctrl->value = ((s32)reg & SAA7191_STDC_VTRC) ? 1 : 0;
447 break;
448 case SAA7191_CONTROL_LUMA_DELAY:
449 reg = saa7191_read_reg(sd, SAA7191_REG_CTL3);
450 ctrl->value = ((s32)reg & SAA7191_CTL3_YDEL_MASK)
451 >> SAA7191_CTL3_YDEL_SHIFT;
452 if (ctrl->value >= 4)
453 ctrl->value -= 8;
454 break;
455 case SAA7191_CONTROL_VNR:
456 reg = saa7191_read_reg(sd, SAA7191_REG_CTL4);
457 ctrl->value = ((s32)reg & SAA7191_CTL4_VNOI_MASK)
458 >> SAA7191_CTL4_VNOI_SHIFT;
459 break;
460 default:
461 ret = -EINVAL;
462 }
463
464 return ret;
465}
466
467static int saa7191_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
468{
469 u8 reg;
470 int ret = 0;
471
472 switch (ctrl->id) {
473 case SAA7191_CONTROL_BANDPASS:
474 case SAA7191_CONTROL_BANDPASS_WEIGHT:
475 case SAA7191_CONTROL_CORING:
476 reg = saa7191_read_reg(sd, SAA7191_REG_LUMA);
477 switch (ctrl->id) {
478 case SAA7191_CONTROL_BANDPASS:
479 reg &= ~SAA7191_LUMA_BPSS_MASK;
480 reg |= (ctrl->value << SAA7191_LUMA_BPSS_SHIFT)
481 & SAA7191_LUMA_BPSS_MASK;
482 break;
483 case SAA7191_CONTROL_BANDPASS_WEIGHT:
484 reg &= ~SAA7191_LUMA_APER_MASK;
485 reg |= (ctrl->value << SAA7191_LUMA_APER_SHIFT)
486 & SAA7191_LUMA_APER_MASK;
487 break;
488 case SAA7191_CONTROL_CORING:
489 reg &= ~SAA7191_LUMA_CORI_MASK;
490 reg |= (ctrl->value << SAA7191_LUMA_CORI_SHIFT)
491 & SAA7191_LUMA_CORI_MASK;
492 break;
493 }
494 ret = saa7191_write_reg(sd, SAA7191_REG_LUMA, reg);
495 break;
496 case SAA7191_CONTROL_FORCE_COLOUR:
497 case SAA7191_CONTROL_CHROMA_GAIN:
498 reg = saa7191_read_reg(sd, SAA7191_REG_GAIN);
499 if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR) {
500 if (ctrl->value)
501 reg |= SAA7191_GAIN_COLO;
502 else
503 reg &= ~SAA7191_GAIN_COLO;
504 } else {
505 reg &= ~SAA7191_GAIN_LFIS_MASK;
506 reg |= (ctrl->value << SAA7191_GAIN_LFIS_SHIFT)
507 & SAA7191_GAIN_LFIS_MASK;
508 }
509 ret = saa7191_write_reg(sd, SAA7191_REG_GAIN, reg);
510 break;
511 case V4L2_CID_HUE:
512 reg = ctrl->value & 0xff;
513 if (reg < 0x80)
514 reg += 0x80;
515 else
516 reg -= 0x80;
517 ret = saa7191_write_reg(sd, SAA7191_REG_HUEC, reg);
518 break;
519 case SAA7191_CONTROL_VTRC:
520 reg = saa7191_read_reg(sd, SAA7191_REG_STDC);
521 if (ctrl->value)
522 reg |= SAA7191_STDC_VTRC;
523 else
524 reg &= ~SAA7191_STDC_VTRC;
525 ret = saa7191_write_reg(sd, SAA7191_REG_STDC, reg);
526 break;
527 case SAA7191_CONTROL_LUMA_DELAY: {
528 s32 value = ctrl->value;
529 if (value < 0)
530 value += 8;
531 reg = saa7191_read_reg(sd, SAA7191_REG_CTL3);
532 reg &= ~SAA7191_CTL3_YDEL_MASK;
533 reg |= (value << SAA7191_CTL3_YDEL_SHIFT)
534 & SAA7191_CTL3_YDEL_MASK;
535 ret = saa7191_write_reg(sd, SAA7191_REG_CTL3, reg);
536 break;
537 }
538 case SAA7191_CONTROL_VNR:
539 reg = saa7191_read_reg(sd, SAA7191_REG_CTL4);
540 reg &= ~SAA7191_CTL4_VNOI_MASK;
541 reg |= (ctrl->value << SAA7191_CTL4_VNOI_SHIFT)
542 & SAA7191_CTL4_VNOI_MASK;
543 ret = saa7191_write_reg(sd, SAA7191_REG_CTL4, reg);
544 break;
545 default:
546 ret = -EINVAL;
547 }
548
549 return ret;
550}
551
552
553
554static int saa7191_g_input_status(struct v4l2_subdev *sd, u32 *status)
555{
556 u8 status_reg;
557 int res = V4L2_IN_ST_NO_SIGNAL;
558
559 if (saa7191_read_status(sd, &status_reg))
560 return -EIO;
561 if ((status_reg & SAA7191_STATUS_HLCK) == 0)
562 res = 0;
563 if (!(status_reg & SAA7191_STATUS_CODE))
564 res |= V4L2_IN_ST_NO_COLOR;
565 *status = res;
566 return 0;
567}
568
569
570static int saa7191_g_chip_ident(struct v4l2_subdev *sd,
571 struct v4l2_dbg_chip_ident *chip)
572{
573 struct i2c_client *client = v4l2_get_subdevdata(sd);
574
575 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7191, 0);
576}
577
578
579
580static const struct v4l2_subdev_core_ops saa7191_core_ops = {
581 .g_chip_ident = saa7191_g_chip_ident,
582 .g_ctrl = saa7191_g_ctrl,
583 .s_ctrl = saa7191_s_ctrl,
584 .s_std = saa7191_s_std,
585};
586
587static const struct v4l2_subdev_video_ops saa7191_video_ops = {
588 .s_routing = saa7191_s_routing,
589 .querystd = saa7191_querystd,
590 .g_input_status = saa7191_g_input_status,
591};
592
593static const struct v4l2_subdev_ops saa7191_ops = {
594 .core = &saa7191_core_ops,
595 .video = &saa7191_video_ops,
596};
597
598static int saa7191_probe(struct i2c_client *client,
599 const struct i2c_device_id *id)
600{
601 int err = 0;
602 struct saa7191 *decoder;
603 struct v4l2_subdev *sd;
604
605 v4l_info(client, "chip found @ 0x%x (%s)\n",
606 client->addr << 1, client->adapter->name);
607
608 decoder = kzalloc(sizeof(*decoder), GFP_KERNEL);
609 if (!decoder)
610 return -ENOMEM;
611
612 sd = &decoder->sd;
613 v4l2_i2c_subdev_init(sd, client, &saa7191_ops);
614
615 err = saa7191_write_block(sd, sizeof(initseq), initseq);
616 if (err) {
617 printk(KERN_ERR "SAA7191 initialization failed\n");
618 kfree(decoder);
619 return err;
620 }
621
622 printk(KERN_INFO "SAA7191 initialized\n");
623
624 decoder->input = SAA7191_INPUT_COMPOSITE;
625 decoder->norm = V4L2_STD_PAL;
626
627 err = saa7191_autodetect_norm(sd);
628 if (err && (err != -EBUSY))
629 printk(KERN_ERR "SAA7191: Signal auto-detection failed\n");
630
631 return 0;
632}
633
634static int saa7191_remove(struct i2c_client *client)
635{
636 struct v4l2_subdev *sd = i2c_get_clientdata(client);
637
638 v4l2_device_unregister_subdev(sd);
639 kfree(to_saa7191(sd));
640 return 0;
641}
642
643static const struct i2c_device_id saa7191_id[] = {
644 { "saa7191", 0 },
645 { }
646};
647MODULE_DEVICE_TABLE(i2c, saa7191_id);
648
649static struct i2c_driver saa7191_driver = {
650 .driver = {
651 .owner = THIS_MODULE,
652 .name = "saa7191",
653 },
654 .probe = saa7191_probe,
655 .remove = saa7191_remove,
656 .id_table = saa7191_id,
657};
658
659module_i2c_driver(saa7191_driver);
660
