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V4L/DVB (8918): saa6752hs: simplify writing to registers

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Add some utility functions to set registers.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2008-09-06 07:00:24 -03:00 committed by Mauro Carvalho Chehab
parent 9afb7377ef
commit ff5f26b40a
1 changed files with 49 additions and 78 deletions
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127
drivers/media/video/saa7134/saa6752hs.c
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@ -224,7 +224,7 @@ static struct saa6752hs_mpeg_params param_defaults =
/* ---------------------------------------------------------------------- */
static int saa6752hs_chip_command(struct i2c_client* client,
static int saa6752hs_chip_command(struct i2c_client *client,
enum saa6752hs_command command)
{
unsigned char buf[3];
@ -291,54 +291,61 @@ static int saa6752hs_chip_command(struct i2c_client* client,
}
static int saa6752hs_set_bitrate(struct i2c_client* client,
static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val)
{
u8 buf[2];
buf[0] = reg;
buf[1] = val;
i2c_master_send(client, buf, 2);
}
static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val)
{
u8 buf[3];
buf[0] = reg;
buf[1] = val >> 8;
buf[2] = val & 0xff;
i2c_master_send(client, buf, 3);
}
static int saa6752hs_set_bitrate(struct i2c_client *client,
struct saa6752hs_state *h)
{
struct saa6752hs_mpeg_params *params = &h->params;
u8 buf[3];
int tot_bitrate;
int is_384k;
/* set the bitrate mode */
buf[0] = 0x71;
buf[1] = (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) ? 0 : 1;
i2c_master_send(client, buf, 2);
set_reg8(client, 0x71,
params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
/* set the video bitrate */
if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
/* set the target bitrate */
buf[0] = 0x80;
buf[1] = params->vi_bitrate >> 8;
buf[2] = params->vi_bitrate & 0xff;
i2c_master_send(client, buf, 3);
set_reg16(client, 0x80, params->vi_bitrate);
/* set the max bitrate */
buf[0] = 0x81;
buf[1] = params->vi_bitrate_peak >> 8;
buf[2] = params->vi_bitrate_peak & 0xff;
i2c_master_send(client, buf, 3);
set_reg16(client, 0x81, params->vi_bitrate_peak);
tot_bitrate = params->vi_bitrate_peak;
} else {
/* set the target bitrate (no max bitrate for CBR) */
buf[0] = 0x81;
buf[1] = params->vi_bitrate >> 8;
buf[2] = params->vi_bitrate & 0xff;
i2c_master_send(client, buf, 3);
set_reg16(client, 0x81, params->vi_bitrate);
tot_bitrate = params->vi_bitrate;
}
/* set the audio encoding */
buf[0] = 0x93;
buf[1] = (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
i2c_master_send(client, buf, 2);
set_reg8(client, 0x93,
params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
/* set the audio bitrate */
buf[0] = 0x94;
if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
buf[1] = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
else
buf[1] = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
tot_bitrate += buf[1] ? 384 : 256;
i2c_master_send(client, buf, 2);
is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
set_reg8(client, 0x94, is_384k);
tot_bitrate += is_384k ? 384 : 256;
/* Note: the total max bitrate is determined by adding the video and audio
bitrates together and also adding an extra 768kbit/s to stay on the
@ -349,16 +356,12 @@ static int saa6752hs_set_bitrate(struct i2c_client* client,
tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
/* set the total bitrate */
buf[0] = 0xb1;
buf[1] = tot_bitrate >> 8;
buf[2] = tot_bitrate & 0xff;
i2c_master_send(client, buf, 3);
set_reg16(client, 0xb1, tot_bitrate);
return 0;
}
static void saa6752hs_set_subsampling(struct i2c_client* client,
struct v4l2_format* f)
static void saa6752hs_set_subsampling(struct i2c_client *client,
struct v4l2_format *f)
{
struct saa6752hs_state *h = i2c_get_clientdata(client);
int dist_352, dist_480, dist_720;
@ -665,51 +668,31 @@ static int saa6752hs_init(struct i2c_client *client, u32 leading_null_bytes)
h = i2c_get_clientdata(client);
/* Set video format - must be done first as it resets other settings */
buf[0] = 0x41;
buf[1] = h->video_format;
i2c_master_send(client, buf, 2);
set_reg8(client, 0x41, h->video_format);
/* Set number of lines in input signal */
buf[0] = 0x40;
buf[1] = 0x00;
if (h->standard & V4L2_STD_525_60)
buf[1] = 0x01;
i2c_master_send(client, buf, 2);
set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0);
/* set bitrate */
saa6752hs_set_bitrate(client, h);
/* Set GOP structure {3, 13} */
buf[0] = 0x72;
buf[1] = 0x03;
buf[2] = 0x0D;
i2c_master_send(client,buf,3);
set_reg16(client, 0x72, 0x030d);
/* Set minimum Q-scale {4} */
buf[0] = 0x82;
buf[1] = 0x04;
i2c_master_send(client,buf,2);
set_reg8(client, 0x82, 0x04);
/* Set maximum Q-scale {12} */
buf[0] = 0x83;
buf[1] = 0x0C;
i2c_master_send(client,buf,2);
set_reg8(client, 0x83, 0x0c);
/* Set Output Protocol */
buf[0] = 0xD0;
buf[1] = 0x81;
i2c_master_send(client,buf,2);
set_reg8(client, 0xd0, 0x81);
/* Set video output stream format {TS} */
buf[0] = 0xB0;
buf[1] = 0x05;
i2c_master_send(client,buf,2);
set_reg8(client, 0xb0, 0x05);
/* Set leading null byte for TS */
buf[0] = 0xF6;
buf[1] = (leading_null_bytes >> 8) & 0xff;
buf[2] = leading_null_bytes & 0xff;
i2c_master_send(client, buf, 3);
set_reg16(client, 0xf6, leading_null_bytes);
/* compute PAT */
memcpy(localPAT, PAT, sizeof(PAT));
@ -744,33 +727,21 @@ static int saa6752hs_init(struct i2c_client *client, u32 leading_null_bytes)
localPMT[size - 1] = crc & 0xFF;
/* Set Audio PID */
buf[0] = 0xC1;
buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
buf[2] = h->params.ts_pid_audio & 0xFF;
i2c_master_send(client,buf,3);
set_reg16(client, 0xc1, h->params.ts_pid_audio);
/* Set Video PID */
buf[0] = 0xC0;
buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
buf[2] = h->params.ts_pid_video & 0xFF;
i2c_master_send(client,buf,3);
set_reg16(client, 0xc0, h->params.ts_pid_video);
/* Set PCR PID */
buf[0] = 0xC4;
buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
buf[2] = h->params.ts_pid_pcr & 0xFF;
i2c_master_send(client,buf,3);
set_reg16(client, 0xc4, h->params.ts_pid_pcr);
/* Send SI tables */
i2c_master_send(client, localPAT, sizeof(PAT));
i2c_master_send(client, localPMT, size);
/* mute then unmute audio. This removes buzzing artefacts */
buf[0] = 0xa4;
buf[1] = 1;
i2c_master_send(client, buf, 2);
buf[1] = 0;
i2c_master_send(client, buf, 2);
set_reg8(client, 0xa4, 1);
set_reg8(client, 0xa4, 0);
/* start it going */
saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);