[PATCH] i2c: Drop i2c_driver.flags, 2 of 3
[linux-2.6.git] / drivers / media / video / saa7134 / saa6752hs.c
1 #include <linux/module.h>
2 #include <linux/kernel.h>
3 #include <linux/sched.h>
4 #include <linux/string.h>
5 #include <linux/timer.h>
6 #include <linux/delay.h>
7 #include <linux/errno.h>
8 #include <linux/slab.h>
9 #include <linux/poll.h>
10 #include <linux/i2c.h>
11 #include <linux/types.h>
12 #include <linux/videodev.h>
13 #include <linux/init.h>
14 #include <linux/crc32.h>
15
16
17 #define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
18 #define MPEG_VIDEO_MAX_BITRATE_MAX     27000
19 #define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
20 #define MPEG_PID_MAX ((1 << 14) - 1)
21
22 /* Addresses to scan */
23 static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
24 I2C_CLIENT_INSMOD;
25
26 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
27 MODULE_AUTHOR("Andrew de Quincey");
28 MODULE_LICENSE("GPL");
29
30 static struct i2c_driver driver;
31 static struct i2c_client client_template;
32
33 enum saa6752hs_videoformat {
34         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
35         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
36         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
37         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
38         SAA6752HS_VF_UNKNOWN,
39 };
40
41 static const struct v4l2_format v4l2_format_table[] =
42 {
43         [SAA6752HS_VF_D1] =
44                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
45         [SAA6752HS_VF_2_3_D1] =
46                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
47         [SAA6752HS_VF_1_2_D1] =
48                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
49         [SAA6752HS_VF_SIF] =
50                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
51         [SAA6752HS_VF_UNKNOWN] =
52                 { .fmt = { .pix = { .width = 0, .height = 0}}},
53 };
54
55 struct saa6752hs_state {
56         struct i2c_client             client;
57         struct v4l2_mpeg_compression  params;
58         enum saa6752hs_videoformat    video_format;
59         v4l2_std_id                   standard;
60 };
61
62 enum saa6752hs_command {
63         SAA6752HS_COMMAND_RESET = 0,
64         SAA6752HS_COMMAND_STOP = 1,
65         SAA6752HS_COMMAND_START = 2,
66         SAA6752HS_COMMAND_PAUSE = 3,
67         SAA6752HS_COMMAND_RECONFIGURE = 4,
68         SAA6752HS_COMMAND_SLEEP = 5,
69         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
70
71         SAA6752HS_COMMAND_MAX
72 };
73
74 /* ---------------------------------------------------------------------- */
75
76 static u8 PAT[] = {
77         0xc2, /* i2c register */
78         0x00, /* table number for encoder */
79
80         0x47, /* sync */
81         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
82         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
83
84         0x00, /* PSI pointer to start of table */
85
86         0x00, /* tid(0) */
87         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
88
89         0x00, 0x01, /* transport_stream_id(1) */
90
91         0xc1, /* version_number(0), current_next_indicator(1) */
92
93         0x00, 0x00, /* section_number(0), last_section_number(0) */
94
95         0x00, 0x01, /* program_number(1) */
96
97         0xe0, 0x00, /* PMT PID */
98
99         0x00, 0x00, 0x00, 0x00 /* CRC32 */
100 };
101
102 static u8 PMT[] = {
103         0xc2, /* i2c register */
104         0x01, /* table number for encoder */
105
106         0x47, /* sync */
107         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
108         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
109
110         0x00, /* PSI pointer to start of table */
111
112         0x02, /* tid(2) */
113         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
114
115         0x00, 0x01, /* program_number(1) */
116
117         0xc1, /* version_number(0), current_next_indicator(1) */
118
119         0x00, 0x00, /* section_number(0), last_section_number(0) */
120
121         0xe0, 0x00, /* PCR_PID */
122
123         0xf0, 0x00, /* program_info_length(0) */
124
125         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
126         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
127
128         0x00, 0x00, 0x00, 0x00 /* CRC32 */
129 };
130
131 static struct v4l2_mpeg_compression param_defaults =
132 {
133         .st_type         = V4L2_MPEG_TS_2,
134         .st_bitrate      = {
135                 .mode    = V4L2_BITRATE_CBR,
136                 .target  = 7000,
137         },
138
139         .ts_pid_pmt      = 16,
140         .ts_pid_video    = 260,
141         .ts_pid_audio    = 256,
142         .ts_pid_pcr      = 259,
143
144         .vi_type         = V4L2_MPEG_VI_2,
145         .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
146         .vi_bitrate      = {
147                 .mode    = V4L2_BITRATE_VBR,
148                 .target  = 4000,
149                 .max     = 6000,
150         },
151
152         .au_type         = V4L2_MPEG_AU_2_II,
153         .au_bitrate      = {
154                 .mode    = V4L2_BITRATE_CBR,
155                 .target  = 256,
156         },
157
158 };
159
160 /* ---------------------------------------------------------------------- */
161
162 static int saa6752hs_chip_command(struct i2c_client* client,
163                                   enum saa6752hs_command command)
164 {
165         unsigned char buf[3];
166         unsigned long timeout;
167         int status = 0;
168
169         /* execute the command */
170         switch(command) {
171         case SAA6752HS_COMMAND_RESET:
172                 buf[0] = 0x00;
173                 break;
174
175         case SAA6752HS_COMMAND_STOP:
176                 buf[0] = 0x03;
177                 break;
178
179         case SAA6752HS_COMMAND_START:
180                 buf[0] = 0x02;
181                 break;
182
183         case SAA6752HS_COMMAND_PAUSE:
184                 buf[0] = 0x04;
185                 break;
186
187         case SAA6752HS_COMMAND_RECONFIGURE:
188                 buf[0] = 0x05;
189                 break;
190
191         case SAA6752HS_COMMAND_SLEEP:
192                 buf[0] = 0x06;
193                 break;
194
195         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
196                 buf[0] = 0x07;
197                 break;
198
199         default:
200                 return -EINVAL;
201         }
202
203         /* set it and wait for it to be so */
204         i2c_master_send(client, buf, 1);
205         timeout = jiffies + HZ * 3;
206         for (;;) {
207                 /* get the current status */
208                 buf[0] = 0x10;
209                 i2c_master_send(client, buf, 1);
210                 i2c_master_recv(client, buf, 1);
211
212                 if (!(buf[0] & 0x20))
213                         break;
214                 if (time_after(jiffies,timeout)) {
215                         status = -ETIMEDOUT;
216                         break;
217                 }
218
219                 msleep(10);
220         }
221
222         /* delay a bit to let encoder settle */
223         msleep(50);
224
225         return status;
226 }
227
228
229 static int saa6752hs_set_bitrate(struct i2c_client* client,
230                                  struct v4l2_mpeg_compression* params)
231 {
232         u8 buf[3];
233
234         /* set the bitrate mode */
235         buf[0] = 0x71;
236         buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
237         i2c_master_send(client, buf, 2);
238
239         /* set the video bitrate */
240         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
241                 /* set the target bitrate */
242                 buf[0] = 0x80;
243                 buf[1] = params->vi_bitrate.target >> 8;
244                 buf[2] = params->vi_bitrate.target & 0xff;
245                 i2c_master_send(client, buf, 3);
246
247                 /* set the max bitrate */
248                 buf[0] = 0x81;
249                 buf[1] = params->vi_bitrate.max >> 8;
250                 buf[2] = params->vi_bitrate.max & 0xff;
251                 i2c_master_send(client, buf, 3);
252         } else {
253                 /* set the target bitrate (no max bitrate for CBR) */
254                 buf[0] = 0x81;
255                 buf[1] = params->vi_bitrate.target >> 8;
256                 buf[2] = params->vi_bitrate.target & 0xff;
257                 i2c_master_send(client, buf, 3);
258         }
259
260         /* set the audio bitrate */
261         buf[0] = 0x94;
262         buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
263         i2c_master_send(client, buf, 2);
264
265         /* set the total bitrate */
266         buf[0] = 0xb1;
267         buf[1] = params->st_bitrate.target >> 8;
268         buf[2] = params->st_bitrate.target & 0xff;
269         i2c_master_send(client, buf, 3);
270
271         return 0;
272 }
273
274 static void saa6752hs_set_subsampling(struct i2c_client* client,
275                                       struct v4l2_format* f)
276 {
277         struct saa6752hs_state *h = i2c_get_clientdata(client);
278         int dist_352, dist_480, dist_720;
279
280         /*
281           FIXME: translate and round width/height into EMPRESS
282           subsample type:
283
284           type   |   PAL   |  NTSC
285           ---------------------------
286           SIF    | 352x288 | 352x240
287           1/2 D1 | 352x576 | 352x480
288           2/3 D1 | 480x576 | 480x480
289           D1     | 720x576 | 720x480
290         */
291
292         dist_352 = abs(f->fmt.pix.width - 352);
293         dist_480 = abs(f->fmt.pix.width - 480);
294         dist_720 = abs(f->fmt.pix.width - 720);
295         if (dist_720 < dist_480) {
296                 f->fmt.pix.width = 720;
297                 f->fmt.pix.height = 576;
298                 h->video_format = SAA6752HS_VF_D1;
299         }
300         else if (dist_480 < dist_352) {
301                 f->fmt.pix.width = 480;
302                 f->fmt.pix.height = 576;
303                 h->video_format = SAA6752HS_VF_2_3_D1;
304         }
305         else {
306                 f->fmt.pix.width = 352;
307                 if (abs(f->fmt.pix.height - 576) <
308                     abs(f->fmt.pix.height - 288)) {
309                         f->fmt.pix.height = 576;
310                         h->video_format = SAA6752HS_VF_1_2_D1;
311                 }
312                 else {
313                         f->fmt.pix.height = 288;
314                         h->video_format = SAA6752HS_VF_SIF;
315                 }
316         }
317 }
318
319
320 static void saa6752hs_set_params(struct i2c_client* client,
321                                  struct v4l2_mpeg_compression* params)
322 {
323         struct saa6752hs_state *h = i2c_get_clientdata(client);
324
325         /* check PIDs */
326         if (params->ts_pid_pmt <= MPEG_PID_MAX)
327                 h->params.ts_pid_pmt = params->ts_pid_pmt;
328         if (params->ts_pid_pcr <= MPEG_PID_MAX)
329                 h->params.ts_pid_pcr = params->ts_pid_pcr;
330         if (params->ts_pid_video <= MPEG_PID_MAX)
331                 h->params.ts_pid_video = params->ts_pid_video;
332         if (params->ts_pid_audio <= MPEG_PID_MAX)
333                 h->params.ts_pid_audio = params->ts_pid_audio;
334
335         /* check bitrate parameters */
336         if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
337             (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
338                 h->params.vi_bitrate.mode = params->vi_bitrate.mode;
339         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
340                 h->params.st_bitrate.target = params->st_bitrate.target;
341         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
342                 h->params.vi_bitrate.target = params->vi_bitrate.target;
343         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
344                 h->params.vi_bitrate.max = params->vi_bitrate.max;
345         if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
346                 h->params.au_bitrate.target = params->au_bitrate.target;
347
348         /* aspect ratio */
349         if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
350             params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
351                 h->params.vi_aspect_ratio = params->vi_aspect_ratio;
352
353         /* range checks */
354         if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
355                 h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
356         if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
357                 h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
358         if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
359                 h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
360         if (h->params.au_bitrate.target <= 256)
361                 h->params.au_bitrate.target = 256;
362         else
363                 h->params.au_bitrate.target = 384;
364 }
365
366 static int saa6752hs_init(struct i2c_client* client)
367 {
368         unsigned char buf[9], buf2[4];
369         struct saa6752hs_state *h;
370         u32 crc;
371         unsigned char localPAT[256];
372         unsigned char localPMT[256];
373
374         h = i2c_get_clientdata(client);
375
376         /* Set video format - must be done first as it resets other settings */
377         buf[0] = 0x41;
378         buf[1] = h->video_format;
379         i2c_master_send(client, buf, 2);
380
381         /* Set number of lines in input signal */
382         buf[0] = 0x40;
383         buf[1] = 0x00;
384         if (h->standard & V4L2_STD_525_60)
385                 buf[1] = 0x01;
386         i2c_master_send(client, buf, 2);
387
388         /* set bitrate */
389         saa6752hs_set_bitrate(client, &h->params);
390
391         /* Set GOP structure {3, 13} */
392         buf[0] = 0x72;
393         buf[1] = 0x03;
394         buf[2] = 0x0D;
395         i2c_master_send(client,buf,3);
396
397         /* Set minimum Q-scale {4} */
398         buf[0] = 0x82;
399         buf[1] = 0x04;
400         i2c_master_send(client,buf,2);
401
402         /* Set maximum Q-scale {12} */
403         buf[0] = 0x83;
404         buf[1] = 0x0C;
405         i2c_master_send(client,buf,2);
406
407         /* Set Output Protocol */
408         buf[0] = 0xD0;
409         buf[1] = 0x81;
410         i2c_master_send(client,buf,2);
411
412         /* Set video output stream format {TS} */
413         buf[0] = 0xB0;
414         buf[1] = 0x05;
415         i2c_master_send(client,buf,2);
416
417         /* compute PAT */
418         memcpy(localPAT, PAT, sizeof(PAT));
419         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
420         localPAT[18] = h->params.ts_pid_pmt & 0xff;
421         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
422         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
423         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
424         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
425         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
426
427         /* compute PMT */
428         memcpy(localPMT, PMT, sizeof(PMT));
429         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
430         localPMT[4] = h->params.ts_pid_pmt & 0xff;
431         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
432         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
433         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
434         localPMT[21] = h->params.ts_pid_video & 0xFF;
435         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
436         localPMT[26] = h->params.ts_pid_audio & 0xFF;
437         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
438         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
439         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
440         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
441         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
442
443         /* Set Audio PID */
444         buf[0] = 0xC1;
445         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
446         buf[2] = h->params.ts_pid_audio & 0xFF;
447         i2c_master_send(client,buf,3);
448
449         /* Set Video PID */
450         buf[0] = 0xC0;
451         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
452         buf[2] = h->params.ts_pid_video & 0xFF;
453         i2c_master_send(client,buf,3);
454
455         /* Set PCR PID */
456         buf[0] = 0xC4;
457         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
458         buf[2] = h->params.ts_pid_pcr & 0xFF;
459         i2c_master_send(client,buf,3);
460
461         /* Send SI tables */
462         i2c_master_send(client,localPAT,sizeof(PAT));
463         i2c_master_send(client,localPMT,sizeof(PMT));
464
465         /* mute then unmute audio. This removes buzzing artefacts */
466         buf[0] = 0xa4;
467         buf[1] = 1;
468         i2c_master_send(client, buf, 2);
469         buf[1] = 0;
470         i2c_master_send(client, buf, 2);
471
472         /* start it going */
473         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
474
475         /* readout current state */
476         buf[0] = 0xE1;
477         buf[1] = 0xA7;
478         buf[2] = 0xFE;
479         buf[3] = 0x82;
480         buf[4] = 0xB0;
481         i2c_master_send(client, buf, 5);
482         i2c_master_recv(client, buf2, 4);
483
484         /* change aspect ratio */
485         buf[0] = 0xE0;
486         buf[1] = 0xA7;
487         buf[2] = 0xFE;
488         buf[3] = 0x82;
489         buf[4] = 0xB0;
490         buf[5] = buf2[0];
491         switch(h->params.vi_aspect_ratio) {
492         case V4L2_MPEG_ASPECT_16_9:
493                 buf[6] = buf2[1] | 0x40;
494                 break;
495         case V4L2_MPEG_ASPECT_4_3:
496         default:
497                 buf[6] = buf2[1] & 0xBF;
498                 break;
499                 break;
500         }
501         buf[7] = buf2[2];
502         buf[8] = buf2[3];
503         i2c_master_send(client, buf, 9);
504
505         return 0;
506 }
507
508 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
509 {
510         struct saa6752hs_state *h;
511
512         printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
513
514         if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
515                 return -ENOMEM;
516         memset(h,0,sizeof(*h));
517         h->client = client_template;
518         h->params = param_defaults;
519         h->client.adapter = adap;
520         h->client.addr = addr;
521
522         /* Assume 625 input lines */
523         h->standard = 0;
524
525         i2c_set_clientdata(&h->client, h);
526         i2c_attach_client(&h->client);
527
528         return 0;
529 }
530
531 static int saa6752hs_probe(struct i2c_adapter *adap)
532 {
533         if (adap->class & I2C_CLASS_TV_ANALOG)
534                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
535         return 0;
536 }
537
538 static int saa6752hs_detach(struct i2c_client *client)
539 {
540         struct saa6752hs_state *h;
541
542         h = i2c_get_clientdata(client);
543         i2c_detach_client(client);
544         kfree(h);
545         return 0;
546 }
547
548 static int
549 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
550 {
551         struct saa6752hs_state *h = i2c_get_clientdata(client);
552         struct v4l2_mpeg_compression *params = arg;
553         int err = 0;
554
555         switch (cmd) {
556         case VIDIOC_S_MPEGCOMP:
557                 if (NULL == params) {
558                         /* apply settings and start encoder */
559                         saa6752hs_init(client);
560                         break;
561                 }
562                 saa6752hs_set_params(client, params);
563                 /* fall through */
564         case VIDIOC_G_MPEGCOMP:
565                 *params = h->params;
566                 break;
567         case VIDIOC_G_FMT:
568         {
569            struct v4l2_format *f = arg;
570
571            if (h->video_format == SAA6752HS_VF_UNKNOWN)
572                    h->video_format = SAA6752HS_VF_D1;
573            f->fmt.pix.width =
574                    v4l2_format_table[h->video_format].fmt.pix.width;
575            f->fmt.pix.height =
576                    v4l2_format_table[h->video_format].fmt.pix.height;
577            break ;
578         }
579         case VIDIOC_S_FMT:
580         {
581                 struct v4l2_format *f = arg;
582
583                 saa6752hs_set_subsampling(client, f);
584                 break;
585         }
586         case VIDIOC_S_STD:
587                 h->standard = *((v4l2_std_id *) arg);
588                 break;
589         default:
590                 /* nothing */
591                 break;
592         }
593
594         return err;
595 }
596
597 /* ----------------------------------------------------------------------- */
598
599 static struct i2c_driver driver = {
600         .owner          = THIS_MODULE,
601         .name           = "i2c saa6752hs MPEG encoder",
602         .id             = I2C_DRIVERID_SAA6752HS,
603         .attach_adapter = saa6752hs_probe,
604         .detach_client  = saa6752hs_detach,
605         .command        = saa6752hs_command,
606 };
607
608 static struct i2c_client client_template =
609 {
610         .name       = "saa6752hs",
611         .flags      = I2C_CLIENT_ALLOW_USE,
612         .driver     = &driver,
613 };
614
615 static int __init saa6752hs_init_module(void)
616 {
617         return i2c_add_driver(&driver);
618 }
619
620 static void __exit saa6752hs_cleanup_module(void)
621 {
622         i2c_del_driver(&driver);
623 }
624
625 module_init(saa6752hs_init_module);
626 module_exit(saa6752hs_cleanup_module);
627
628 /*
629  * Overrides for Emacs so that we follow Linus's tabbing style.
630  * ---------------------------------------------------------------------------
631  * Local variables:
632  * c-basic-offset: 8
633  * End:
634  */