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====== ADAV80X Sound CODEC Linux Driver ======

===== Supported devices =====

  * [[adi>ADAV801]]
  * [[adi>ADAV803]]

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

===== Reference Circuits =====

  * [[adi>CN0219]]
===== Evaluation Boards ======

  * [[adi>EVAL-ADAV801EBZ]]
  * [[adi>EVAL-ADAV803EBZ]]

====== Source Code ======

==== Status ====

^ Source ^ Mainlined? ^
| [[git.linux.org>sound/soc/codecs/adav80x.c|git]] | [[git.linux.org>sound/soc/codecs/adav80x.c|Yes]] |

==== Files ====

^ Function ^ File ^
| driver  | [[git.linux.org>sound/soc/codecs/adav80x.c]] |
| include | [[git.linux.org>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?  ^
| [[bfgit>linux-kernel?sound/soc/blackfin/bfin-eval-adav80x.c|git]] | [[git.linux.org>sound/soc/blackfin/bfin-eval-adav80x.c|Yes]] |

==== Files ====

^ Function ^ File ^
| driver  | [[git.linux.org>sound/soc/blackfin/bfin-eval-adav80x.c]] |

===== Kernel configuration =====

For ADAV801, enable SPI:
<code>
Device Drivers  --->
[*] SPI support  --->
***   SPI Master Controller Drivers ***
<*>   SPI controller driver for ADI Blackfin5xx
</code>

For ADAV803, enable I2C:
<code>
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)
</code>

Enable ALSA SoC evaluation board driver:
<code>
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
</code>

===== 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.

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
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
</xterm>
</WRAP>

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
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
</xterm>
</WRAP>
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