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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#include <media/v4l2-i2c-drv.h>
27
28#include "saa7191.h"
29
30#define SAA7191_MODULE_VERSION "0.0.5"
31
32MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
33MODULE_VERSION(SAA7191_MODULE_VERSION);
34MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
35MODULE_LICENSE("GPL");
36
37
38
39
40#ifdef SAA7191_DEBUG
41#define dprintk(x...) printk("SAA7191: " x);
42#else
43#define dprintk(x...)
44#endif
45
46#define SAA7191_SYNC_COUNT 30
47#define SAA7191_SYNC_DELAY 100
48
49struct saa7191 {
50 struct v4l2_subdev sd;
51
52
53
54 u8 reg[25];
55
56 int input;
57 v4l2_std_id norm;
58};
59
60static inline struct saa7191 *to_saa7191(struct v4l2_subdev *sd)
61{
62 return container_of(sd, struct saa7191, sd);
63}
64
65static const u8 initseq[] = {
66 0,
67
68 0x50,
69
70
71 0x30,
72 0x00,
73 0xe8,
74 0xb6,
75 0xf4,
76
77
78 SAA7191_LUMA_APER_1,
79 0x00,
80 0xf8,
81 0xf8,
82 0x90,
83 0x90,
84 0x00,
85 SAA7191_STDC_NFEN | SAA7191_STDC_HRMV,
86
87
88 SAA7191_IOCK_OEDC | SAA7191_IOCK_OEHS | SAA7191_IOCK_OEVS
89 | SAA7191_IOCK_OEDY,
90
91 SAA7191_CTL3_AUFD | SAA7191_CTL3_SCEN | SAA7191_CTL3_OFTS
92 | SAA7191_CTL3_YDEL0,
93
94 0x00,
95 0x2c,
96 0x00,
97 0x00,
98
99
100 0x34,
101 0x0a,
102 0xf4,
103 0xce,
104 0xf4,
105};
106
107
108
109static u8 saa7191_read_reg(struct v4l2_subdev *sd, u8 reg)
110{
111 return to_saa7191(sd)->reg[reg];
112}
113
114static int saa7191_read_status(struct v4l2_subdev *sd, u8 *value)
115{
116 struct i2c_client *client = v4l2_get_subdevdata(sd);
117 int ret;
118
119 ret = i2c_master_recv(client, value, 1);
120 if (ret < 0) {
121 printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed\n");
122 return ret;
123 }
124
125 return 0;
126}
127
128
129static int saa7191_write_reg(struct v4l2_subdev *sd, u8 reg, u8 value)
130{
131 struct i2c_client *client = v4l2_get_subdevdata(sd);
132
133 to_saa7191(sd)->reg[reg] = value;
134 return i2c_smbus_write_byte_data(client, reg, value);
135}
136
137
138static int saa7191_write_block(struct v4l2_subdev *sd,
139 u8 length, const u8 *data)
140{
141 struct i2c_client *client = v4l2_get_subdevdata(sd);
142 struct saa7191 *decoder = to_saa7191(sd);
143 int i;
144 int ret;
145
146 for (i = 0; i < (length - 1); i++) {
147 decoder->reg[data[0] + i] = data[i + 1];
148 }
149
150 ret = i2c_master_send(client, data, length);
151 if (ret < 0) {
152 printk(KERN_ERR "SAA7191: saa7191_write_block(): "
153 "write failed\n");
154 return ret;
155 }
156
157 return 0;
158}
159
160
161
162static int saa7191_s_routing(struct v4l2_subdev *sd,
163 u32 input, u32 output, u32 config)
164{
165 struct saa7191 *decoder = to_saa7191(sd);
166 u8 luma = saa7191_read_reg(sd, SAA7191_REG_LUMA);
167 u8 iock = saa7191_read_reg(sd, SAA7191_REG_IOCK);
168 int err;
169
170 switch (input) {
171 case SAA7191_INPUT_COMPOSITE:
172 iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1
173 | SAA7191_IOCK_GPSW2);
174
175 luma &= ~SAA7191_LUMA_BYPS;
176 break;
177 case SAA7191_INPUT_SVIDEO:
178 iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2;
179
180 luma |= SAA7191_LUMA_BYPS;
181 break;
182 default:
183 return -EINVAL;
184 }
185
186 err = saa7191_write_reg(sd, SAA7191_REG_LUMA, luma);
187 if (err)
188 return -EIO;
189 err = saa7191_write_reg(sd, SAA7191_REG_IOCK, iock);
190 if (err)
191 return -EIO;
192
193 decoder->input = input;
194
195 return 0;
196}
197
198static int saa7191_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
199{
200 struct saa7191 *decoder = to_saa7191(sd);
201 u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC);
202 u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3);
203 u8 chcv = saa7191_read_reg(sd, SAA7191_REG_CHCV);
204 int err;
205
206 if (norm & V4L2_STD_PAL) {
207 stdc &= ~SAA7191_STDC_SECS;
208 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
209 chcv = SAA7191_CHCV_PAL;
210 } else if (norm & V4L2_STD_NTSC) {
211 stdc &= ~SAA7191_STDC_SECS;
212 ctl3 &= ~SAA7191_CTL3_AUFD;
213 ctl3 |= SAA7191_CTL3_FSEL;
214 chcv = SAA7191_CHCV_NTSC;
215 } else if (norm & V4L2_STD_SECAM) {
216 stdc |= SAA7191_STDC_SECS;
217 ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
218 chcv = SAA7191_CHCV_PAL;
219 } else {
220 return -EINVAL;
221 }
222
223 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
224 if (err)
225 return -EIO;
226 err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc);
227 if (err)
228 return -EIO;
229 err = saa7191_write_reg(sd, SAA7191_REG_CHCV, chcv);
230 if (err)
231 return -EIO;
232
233 decoder->norm = norm;
234
235 dprintk("ctl3: %02x stdc: %02x chcv: %02x\n", ctl3,
236 stdc, chcv);
237 dprintk("norm: %llx\n", norm);
238
239 return 0;
240}
241
242static int saa7191_wait_for_signal(struct v4l2_subdev *sd, u8 *status)
243{
244 int i = 0;
245
246 dprintk("Checking for signal...\n");
247
248 for (i = 0; i < SAA7191_SYNC_COUNT; i++) {
249 if (saa7191_read_status(sd, status))
250 return -EIO;
251
252 if (((*status) & SAA7191_STATUS_HLCK) == 0) {
253 dprintk("Signal found\n");
254 return 0;
255 }
256
257 msleep(SAA7191_SYNC_DELAY);
258 }
259
260 dprintk("No signal\n");
261
262 return -EBUSY;
263}
264
265static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm)
266{
267 struct saa7191 *decoder = to_saa7191(sd);
268 u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC);
269 u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3);
270 u8 status;
271 v4l2_std_id old_norm = decoder->norm;
272 int err = 0;
273
274 dprintk("SAA7191 extended signal auto-detection...\n");
275
276 *norm = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
277 stdc &= ~SAA7191_STDC_SECS;
278 ctl3 &= ~(SAA7191_CTL3_FSEL);
279
280 err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc);
281 if (err) {
282 err = -EIO;
283 goto out;
284 }
285 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
286 if (err) {
287 err = -EIO;
288 goto out;
289 }
290
291 ctl3 |= SAA7191_CTL3_AUFD;
292 err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3);
293 if (err) {
294 err = -EIO;
295 goto out;
296 }
297
298 msleep(SAA7191_SYNC_DELAY);
299
300 err = saa7191_wait_for_signal(sd, &status);
301 if (err)
302 goto out;
303
304 if (status & SAA7191_STATUS_FIDT) {
305
306 dprintk("60Hz signal: NTSC\n");
307 *norm = V4L2_STD_NTSC;
308 return 0;
309 }
310
311
312 dprintk("50Hz signal: Trying PAL...\n");
313
314
315 err = saa7191_s_std(sd, V4L2_STD_PAL);
316 if (err)
317 goto out;
318
319 msleep(SAA7191_SYNC_DELAY);
320
321 err = saa7191_wait_for_signal(sd, &status);
322 if (err)
323 goto out;
324
325
326 if (status & SAA7191_STATUS_FIDT) {
327 dprintk("No 50Hz signal\n");
328 saa7191_s_std(sd, old_norm);
329 return -EAGAIN;
330 }
331
332 if (status & SAA7191_STATUS_CODE) {
333 dprintk("PAL\n");
334 *norm = V4L2_STD_PAL;
335 return saa7191_s_std(sd, old_norm);
336 }
337
338 dprintk("No color detected with PAL - Trying SECAM...\n");
339
340
341 err = saa7191_s_std(sd, V4L2_STD_SECAM);
342 if (err)
343 goto out;
344
345 msleep(SAA7191_SYNC_DELAY);
346
347 err = saa7191_wait_for_signal(sd, &status);
348 if (err)
349 goto out;
350
351
352 if (status & SAA7191_STATUS_FIDT) {
353 dprintk("No 50Hz signal\n");
354 err = -EAGAIN;
355 goto out;
356 }
357
358 if (status & SAA7191_STATUS_CODE) {
359
360 dprintk("SECAM\n");
361 *norm = V4L2_STD_SECAM;
362 return saa7191_s_std(sd, old_norm);
363 }
364
365 dprintk("No color detected with SECAM - Going back to PAL.\n");
366
367out:
368 return saa7191_s_std(sd, old_norm);
369}
370
371static int saa7191_autodetect_norm(struct v4l2_subdev *sd)
372{
373 u8 status;
374
375 dprintk("SAA7191 signal auto-detection...\n");
376
377 dprintk("Reading status...\n");
378
379 if (saa7191_read_status(sd, &status))
380 return -EIO;
381
382 dprintk("Checking for signal...\n");
383
384
385 if (status & SAA7191_STATUS_HLCK) {
386 dprintk("No signal\n");
387 return -EBUSY;
388 }
389
390 dprintk("Signal found\n");
391
392 if (status & SAA7191_STATUS_FIDT) {
393
394 dprintk("NTSC\n");
395 return saa7191_s_std(sd, V4L2_STD_NTSC);
396 } else {
397
398 dprintk("PAL\n");
399 return saa7191_s_std(sd, V4L2_STD_PAL);
400 }
401}
402
403static int saa7191_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
404{
405 u8 reg;
406 int ret = 0;
407
408 switch (ctrl->id) {
409 case SAA7191_CONTROL_BANDPASS:
410 case SAA7191_CONTROL_BANDPASS_WEIGHT:
411 case SAA7191_CONTROL_CORING:
412 reg = saa7191_read_reg(sd, SAA7191_REG_LUMA);
413 switch (ctrl->id) {
414 case SAA7191_CONTROL_BANDPASS:
415 ctrl->value = ((s32)reg & SAA7191_LUMA_BPSS_MASK)
416 >> SAA7191_LUMA_BPSS_SHIFT;
417 break;
418 case SAA7191_CONTROL_BANDPASS_WEIGHT:
419 ctrl->value = ((s32)reg & SAA7191_LUMA_APER_MASK)
420 >> SAA7191_LUMA_APER_SHIFT;
421 break;
422 case SAA7191_CONTROL_CORING:
423 ctrl->value = ((s32)reg & SAA7191_LUMA_CORI_MASK)
424 >> SAA7191_LUMA_CORI_SHIFT;
425 break;
426 }
427 break;
428 case SAA7191_CONTROL_FORCE_COLOUR:
429 case SAA7191_CONTROL_CHROMA_GAIN:
430 reg = saa7191_read_reg(sd, SAA7191_REG_GAIN);
431 if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR)
432 ctrl->value = ((s32)reg & SAA7191_GAIN_COLO) ? 1 : 0;
433 else
434 ctrl->value = ((s32)reg & SAA7191_GAIN_LFIS_MASK)
435 >> SAA7191_GAIN_LFIS_SHIFT;
436 break;
437 case V4L2_CID_HUE:
438 reg = saa7191_read_reg(sd, SAA7191_REG_HUEC);
439 if (reg < 0x80)
440 reg += 0x80;
441 else
442 reg -= 0x80;
443 ctrl->value = (s32)reg;
444 break;
445 case SAA7191_CONTROL_VTRC:
446 reg = saa7191_read_reg(sd, SAA7191_REG_STDC);
447 ctrl->value = ((s32)reg & SAA7191_STDC_VTRC) ? 1 : 0;
448 break;
449 case SAA7191_CONTROL_LUMA_DELAY:
450 reg = saa7191_read_reg(sd, SAA7191_REG_CTL3);
451 ctrl->value = ((s32)reg & SAA7191_CTL3_YDEL_MASK)
452 >> SAA7191_CTL3_YDEL_SHIFT;
453 if (ctrl->value >= 4)
454 ctrl->value -= 8;
455 break;
456 case SAA7191_CONTROL_VNR:
457 reg = saa7191_read_reg(sd, SAA7191_REG_CTL4);
458 ctrl->value = ((s32)reg & SAA7191_CTL4_VNOI_MASK)
459 >> SAA7191_CTL4_VNOI_SHIFT;
460 break;
461 default:
462 ret = -EINVAL;
463 }
464
465 return ret;
466}
467
468static int saa7191_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
469{
470 u8 reg;
471 int ret = 0;
472
473 switch (ctrl->id) {
474 case SAA7191_CONTROL_BANDPASS:
475 case SAA7191_CONTROL_BANDPASS_WEIGHT:
476 case SAA7191_CONTROL_CORING:
477 reg = saa7191_read_reg(sd, SAA7191_REG_LUMA);
478 switch (ctrl->id) {
479 case SAA7191_CONTROL_BANDPASS:
480 reg &= ~SAA7191_LUMA_BPSS_MASK;
481 reg |= (ctrl->value << SAA7191_LUMA_BPSS_SHIFT)
482 & SAA7191_LUMA_BPSS_MASK;
483 break;
484 case SAA7191_CONTROL_BANDPASS_WEIGHT:
485 reg &= ~SAA7191_LUMA_APER_MASK;
486 reg |= (ctrl->value << SAA7191_LUMA_APER_SHIFT)
487 & SAA7191_LUMA_APER_MASK;
488 break;
489 case SAA7191_CONTROL_CORING:
490 reg &= ~SAA7191_LUMA_CORI_MASK;
491 reg |= (ctrl->value << SAA7191_LUMA_CORI_SHIFT)
492 & SAA7191_LUMA_CORI_MASK;
493 break;
494 }
495 ret = saa7191_write_reg(sd, SAA7191_REG_LUMA, reg);
496 break;
497 case SAA7191_CONTROL_FORCE_COLOUR:
498 case SAA7191_CONTROL_CHROMA_GAIN:
499 reg = saa7191_read_reg(sd, SAA7191_REG_GAIN);
500 if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR) {
501 if (ctrl->value)
502 reg |= SAA7191_GAIN_COLO;
503 else
504 reg &= ~SAA7191_GAIN_COLO;
505 } else {
506 reg &= ~SAA7191_GAIN_LFIS_MASK;
507 reg |= (ctrl->value << SAA7191_GAIN_LFIS_SHIFT)
508 & SAA7191_GAIN_LFIS_MASK;
509 }
510 ret = saa7191_write_reg(sd, SAA7191_REG_GAIN, reg);
511 break;
512 case V4L2_CID_HUE:
513 reg = ctrl->value & 0xff;
514 if (reg < 0x80)
515 reg += 0x80;
516 else
517 reg -= 0x80;
518 ret = saa7191_write_reg(sd, SAA7191_REG_HUEC, reg);
519 break;
520 case SAA7191_CONTROL_VTRC:
521 reg = saa7191_read_reg(sd, SAA7191_REG_STDC);
522 if (ctrl->value)
523 reg |= SAA7191_STDC_VTRC;
524 else
525 reg &= ~SAA7191_STDC_VTRC;
526 ret = saa7191_write_reg(sd, SAA7191_REG_STDC, reg);
527 break;
528 case SAA7191_CONTROL_LUMA_DELAY: {
529 s32 value = ctrl->value;
530 if (value < 0)
531 value += 8;
532 reg = saa7191_read_reg(sd, SAA7191_REG_CTL3);
533 reg &= ~SAA7191_CTL3_YDEL_MASK;
534 reg |= (value << SAA7191_CTL3_YDEL_SHIFT)
535 & SAA7191_CTL3_YDEL_MASK;
536 ret = saa7191_write_reg(sd, SAA7191_REG_CTL3, reg);
537 break;
538 }
539 case SAA7191_CONTROL_VNR:
540 reg = saa7191_read_reg(sd, SAA7191_REG_CTL4);
541 reg &= ~SAA7191_CTL4_VNOI_MASK;
542 reg |= (ctrl->value << SAA7191_CTL4_VNOI_SHIFT)
543 & SAA7191_CTL4_VNOI_MASK;
544 ret = saa7191_write_reg(sd, SAA7191_REG_CTL4, reg);
545 break;
546 default:
547 ret = -EINVAL;
548 }
549
550 return ret;
551}
552
553
554
555static int saa7191_g_input_status(struct v4l2_subdev *sd, u32 *status)
556{
557 u8 status_reg;
558 int res = V4L2_IN_ST_NO_SIGNAL;
559
560 if (saa7191_read_status(sd, &status_reg))
561 return -EIO;
562 if ((status_reg & SAA7191_STATUS_HLCK) == 0)
563 res = 0;
564 if (!(status_reg & SAA7191_STATUS_CODE))
565 res |= V4L2_IN_ST_NO_COLOR;
566 *status = res;
567 return 0;
568}
569
570
571static int saa7191_g_chip_ident(struct v4l2_subdev *sd,
572 struct v4l2_dbg_chip_ident *chip)
573{
574 struct i2c_client *client = v4l2_get_subdevdata(sd);
575
576 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7191, 0);
577}
578
579
580
581static const struct v4l2_subdev_core_ops saa7191_core_ops = {
582 .g_chip_ident = saa7191_g_chip_ident,
583 .g_ctrl = saa7191_g_ctrl,
584 .s_ctrl = saa7191_s_ctrl,
585 .s_std = saa7191_s_std,
586};
587
588static const struct v4l2_subdev_video_ops saa7191_video_ops = {
589 .s_routing = saa7191_s_routing,
590 .querystd = saa7191_querystd,
591 .g_input_status = saa7191_g_input_status,
592};
593
594static const struct v4l2_subdev_ops saa7191_ops = {
595 .core = &saa7191_core_ops,
596 .video = &saa7191_video_ops,
597};
598
599static int saa7191_probe(struct i2c_client *client,
600 const struct i2c_device_id *id)
601{
602 int err = 0;
603 struct saa7191 *decoder;
604 struct v4l2_subdev *sd;
605
606 v4l_info(client, "chip found @ 0x%x (%s)\n",
607 client->addr << 1, client->adapter->name);
608
609 decoder = kzalloc(sizeof(*decoder), GFP_KERNEL);
610 if (!decoder)
611 return -ENOMEM;
612
613 sd = &decoder->sd;
614 v4l2_i2c_subdev_init(sd, client, &saa7191_ops);
615
616 err = saa7191_write_block(sd, sizeof(initseq), initseq);
617 if (err) {
618 printk(KERN_ERR "SAA7191 initialization failed\n");
619 kfree(decoder);
620 return err;
621 }
622
623 printk(KERN_INFO "SAA7191 initialized\n");
624
625 decoder->input = SAA7191_INPUT_COMPOSITE;
626 decoder->norm = V4L2_STD_PAL;
627
628 err = saa7191_autodetect_norm(sd);
629 if (err && (err != -EBUSY))
630 printk(KERN_ERR "SAA7191: Signal auto-detection failed\n");
631
632 return 0;
633}
634
635static int saa7191_remove(struct i2c_client *client)
636{
637 struct v4l2_subdev *sd = i2c_get_clientdata(client);
638
639 v4l2_device_unregister_subdev(sd);
640 kfree(to_saa7191(sd));
641 return 0;
642}
643
644static const struct i2c_device_id saa7191_id[] = {
645 { "saa7191", 0 },
646 { }
647};
648MODULE_DEVICE_TABLE(i2c, saa7191_id);
649
650static struct v4l2_i2c_driver_data v4l2_i2c_data = {
651 .name = "saa7191",
652 .probe = saa7191_probe,
653 .remove = saa7191_remove,
654 .id_table = saa7191_id,
655};
656
