ADAV80X

ADAV80X Sound CODEC Linux Driver.

Supported Devices

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

Evaluation Boards

Reference Circuits

CN0219

Description

Driver features and limitations

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

Source Code

Status

Source	Mainlined?
Upstream tree	Yes

Files

Function	File
shared codec	sound/soc/codecs/adav80x.c
ADAV801 SPI driver	sound/soc/codecs/adav801.c
ADAV803 I2C driver	sound/soc/codecs/adav803.c
include	sound/soc/codecs/adav80x.h

Adding Linux driver support

Board integration

ADAV80X evaluation board driver

The following Blackfin board integration and configuration instructions are historical. Upstream removed the board driver in commit 6ca1118551ca5bb267e75faa6b944679ca195423; the source link below points to the last version before the removal. The ADAV80X codec and its ADAV801/ADAV803 bus drivers remain upstream.

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	Deprecated

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

Driver testing

Routing and DAPM

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	Mute/Unmute ADC input
Master Capture Volume	ADC digital volume
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`