diff options
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-reg.h | 10 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 35 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx.h | 8 |
3 files changed, 52 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h index 491d66abe7f..12c9132b099 100644 --- a/drivers/media/video/em28xx/em28xx-reg.h +++ b/drivers/media/video/em28xx/em28xx-reg.h @@ -17,6 +17,16 @@ /* em28xx registers */ +#define EM28XX_R00_CHIPCFG 0x00 + +/* em28xx Chip Configuration 0x00 */ +#define EM28XX_CHIPCFG_VENDOR_AUDIO 0x80 +#define EM28XX_CHIPCFG_I2S_VOLUME_CAPABLE 0x40 +#define EM28XX_CHIPCFG_I2S_3_SAMPRATES 0x30 +#define EM28XX_CHIPCFG_I2S_5_SAMPRATES 0x20 +#define EM28XX_CHIPCFG_AC97 0x10 +#define EM28XX_CHIPCFG_AUDIOMASK 0x30 + /* GPIO/GPO registers */ #define EM2880_R04_GPO 0x04 /* em2880-em2883 only */ #define EM28XX_R08_GPIO 0x08 /* em2820 or upper */ diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 154a99c61ee..1e26061116e 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1933,16 +1933,49 @@ static struct video_device *em28xx_vdev_init(struct em28xx *dev, int em28xx_supports_audio_extension(struct em28xx *dev) { + int rc; + /* The chip dictates whether we support the Empia analog audio extension */ switch (dev->chip_id) { case CHIP_ID_EM2874: - /* Either a digital-only device or provides AC97 audio */ + /* Digital only device - no analog support */ + dev->audio_mode = EM28XX_NO_AUDIO; return 0; + case CHIP_ID_EM2860: case CHIP_ID_EM2883: default: + /* See how this device is configured */ + rc = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG); + if (rc & EM28XX_CHIPCFG_VENDOR_AUDIO) { + switch(rc & EM28XX_CHIPCFG_AUDIOMASK) { + case EM28XX_CHIPCFG_AC97: + em28xx_info("AC97 audio (5 sample rates)\n"); + dev->audio_mode = EM28XX_AC97; + break; + case EM28XX_CHIPCFG_I2S_3_SAMPRATES: + em28xx_info("I2S Audio (3 sample rates)\n"); + dev->audio_mode = EM28XX_I2S_3_SAMPLE_RATES; + break; + case EM28XX_CHIPCFG_I2S_5_SAMPRATES: + em28xx_info("I2S Audio (5 sample rates)\n"); + dev->audio_mode = EM28XX_I2S_5_SAMPLE_RATES; + break; + default: + em28xx_info("No audio support detected\n"); + dev->audio_mode = EM28XX_NO_AUDIO; + return 0; + } + } else { + em28xx_info("USB Audio class device\n"); + return 0; + } + /* The em28xx audio extension needs to be loaded */ return 1; } + + /* We should never reach this point */ + return 0; } static int register_analog_devices(struct em28xx *dev) diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index 3152d00e548..f47c8d34ec7 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -256,6 +256,13 @@ enum enum28xx_itype { EM28XX_RADIO, }; +enum em28xx_audio_mode { + EM28XX_NO_AUDIO, + EM28XX_I2S_3_SAMPLE_RATES, + EM28XX_I2S_5_SAMPLE_RATES, + EM28XX_AC97, +}; + enum em28xx_amux { EM28XX_AMUX_VIDEO, EM28XX_AMUX_LINE_IN, @@ -403,6 +410,7 @@ struct em28xx { u32 i2s_speed; /* I2S speed for audio digital stream */ enum em28xx_decoder decoder; + enum em28xx_audio_mode audio_mode; int tuner_type; /* type of the tuner */ int tuner_addr; /* tuner address */ |