ADAV80X

ADAV80X Sound CODEC Linux Driver.

Supported devices

ADAV801 and ADAV803 differs in serial interface. ADAV801 uses SPI, while ADAV803 uses I2C.

Reference Circuits

Evaluation Boards

Source Code

Status

Source

Mainlined?

git

Yes

Files

Function

File

driver

sound/soc/codecs/adav80x.c

include

sound/soc/codecs/adav80x.h

Supported Features

ASoC DAPM widgets

Name

Description

VINL

Left Analog Input

VINR

Right Analog Input

VOUTL

Left Analog Output

VOUTR

Right Analog Output

ALSA controls

Name

Description

Master Playback Volume

DAC Volume

Master Playback Switch

Mute/Unmute DAC output

Master Capture Switch

ADC Volume

Master Capture Volume

Mute/Unmute ADC input

PGA Capture Volume

Input PGA gain

ADC High Pass Filter Switch

Enable/Disable ADC high-pass filter

Playback De-emphasis Switch

Enable/Disable playback de-emphassis

Capture Select

Select the serial port capture source. Possible values: ADC, Playback, Aux Playback

Aux Capture Select

Select the auxiliary serial port capture source. Possible values: ADC, Playback, Aux Playback

DAC Select

Select the DAC signal source. Possible values: ADC, Playback, Aux Playback

Supported DAI formats

Name

Supported by driver

Description

SND_SOC_DAIFMT_I2S

yes

I2S mode

SND_SOC_DAIFMT_RIGHT_J

yes

Right Justified mode

SND_SOC_DAIFMT_LEFT_J

yes

Left Justified mode

SND_SOC_DAIFMT_DSP_A

no

data MSB after FRM LRC

SND_SOC_DAIFMT_DSP_B

no

data MSB during FRM LRC

SND_SOC_DAIFMT_AC97

no

AC97 mode

SND_SOC_DAIFMT_PDM

no

Pulse density modulation

SND_SOC_DAIFMT_NB_NF

yes

Normal bit- and frameclock

SND_SOC_DAIFMT_NB_IF

no

Normal bitclock, inverted frameclock

SND_SOC_DAIFMT_IB_NF

no

Inverted frameclock, normal bitclock

SND_SOC_DAIFMT_IB_IF

no

Inverted bit- and frameclock

SND_SOC_DAIFMT_CBM_CFM

yes

Codec bit- and frameclock master

SND_SOC_DAIFMT_CBS_CFM

no

Codec bitclock slave, frameclock master

SND_SOC_DAIFMT_CBM_CFS

no

Codec bitclock master, frameclock slave

SND_SOC_DAIFMT_CBS_CFS

yes

Codec bit- and frameclock slave

Currently unsupported features

  • Automatic level control

  • on-chip sample rate converter (Both serial ports have to use the same sample rate)

  • S/PDIF input and output

ADAV80X evaluation board driver

There is no dedicated Blackfin STAMP evaluation board for the ADAV80X. During test and driver development we used the EVAL-ADAV801/ADAV803 board.

It can be easily wired to the Blackfin STAMP SPORT header.

Source Code

Status

Source

Mainlined?

git

Yes

Files

Function

File

driver

sound/soc/blackfin/bfin-eval-adav80x.c

Kernel configuration

For ADAV801, enable SPI:

Device Drivers  --->
[*] SPI support  --->
***   SPI Master Controller Drivers ***
<*>   SPI controller driver for ADI Blackfin5xx

For ADAV803, enable I2C:

Device Drivers  --->
[*] I2C support  --->
[*]   I2C Hardware Bus support  --->
***     I2C system bus drivers (mostly embedded / system-on-chip) ***
<*>       Blackfin TWI I2C support
(100)     Blackfin TWI I2C clock (kHz)

Enable ALSA SoC evaluation board driver:

Device Drivers  --->
<M> Sound card support  --->
<M>   Advanced Linux Sound Architecture  --->
<M>     ALSA for SoC audio support  --->
<M>       Support for the EVAL-ADAV80X boards on Blackfin eval boards

Hardware configuration

Default setting for the 12-way DIP switch: from SW11 to SW0 - 110001110001. Keep all switch and jumpers as default value defined in the manual, except:

  • Playback Port Source: SW11: 0, SW10: 0 (Make it tri-state since we connect playback port to Blackfin SPORT)

  • ADAV80x MCLK Source: SW0: 0, LK4: A, LK5: ON, LK6: ON (Use the on board cystal oscillator as MCLK source).

To test using BF537-STAMP board, connect play and rec port on the ADAV80X evaluation board with SPORT0 on STAMP. Connect CPORT pins also to corresponding pins STAMP. Also, please make sure to connect the GND of the two boards together to get better signal.

Driver testing

Load the driver and make sure the sound card is properly instantiated.

root:/> modprobe snd-bf5xx-i2s
root:/> modprobe snd-soc-bf5xx-i2s
root:/> modprobe snd-soc-adav80x
root:/> modprobe snd-soc-bfin-eval-adav80x
dma rx:3 tx:4, err irq:45, regs:ffc00800
asoc: ADAV80X <-> bf5xx-i2s mapping ok

root:/> modprobe snd-pcm-oss
root:/> tone
TONE: generating sine wave at 1000 Hz...

root:/> arecord -f cd | aplay
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo