ASoC: blackfin I2S(TDM mode) CPU DAI driver

The I2S DAI driver for blackfin SPORT, but works in TDM mode.
I2S is not a special case of TDM with only left and right two slots for
SPORT interface. I2S coordinates with TDM in SPORT, but not a part of
TDM. TDM require different hardware configuration with I2S, not only
different slot number.  One is "Stereo Serial Operation" mode of SPORT,
the other one is "Multichannel Operation" mode. They are incompatible
at the same time.
Hardware and DMA description and data transfer flow are much different
for I2S and TDM. Merging them as a whole will be very ugly and difficult
to maintain.
So we don't define a new DAI type, but give two DAI instances for standard
I2S and TDM, both in I2S-family DAI type. The TDM instance still uses the
I2S-family DAI type.

Signed-off-by: Barry Song <21cnbao@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/sound/soc/blackfin/Kconfig b/sound/soc/blackfin/Kconfig
index 811596f4c092..2ab6d2fa87a0 100644
--- a/sound/soc/blackfin/Kconfig
+++ b/sound/soc/blackfin/Kconfig
@@ -7,6 +7,15 @@ config SND_BF5XX_I2S
           mode (supports single stereo In/Out).
           You will also need to select the audio interfaces to support below.
 
+config SND_BF5XX_TDM
+        tristate "SoC I2S(TDM mode) Audio for the ADI BF5xx chip"
+        depends on (BLACKFIN && SND_SOC)
+        help
+          Say Y or M if you want to add support for codecs attached to
+          the Blackfin SPORT (synchronous serial ports) interface in TDM
+          mode.
+          You will also need to select the audio interfaces to support below.
+
 config SND_BF5XX_SOC_SSM2602
         tristate "SoC SSM2602 Audio support for BF52x ezkit"
         depends on SND_BF5XX_I2S
@@ -69,6 +78,10 @@ config SND_BF5XX_SOC_I2S
         tristate
         select SND_BF5XX_SOC_SPORT
 
+config SND_BF5XX_SOC_TDM
+        tristate
+        select SND_BF5XX_SOC_SPORT
+
 config SND_BF5XX_SOC_AC97
         tristate
         select AC97_BUS
@@ -85,7 +98,7 @@ config SND_BF5XX_SOC_AD1980
 
 config SND_BF5XX_SPORT_NUM
         int "Set a SPORT for Sound chip"
-        depends on (SND_BF5XX_I2S || SND_BF5XX_AC97)
+        depends on (SND_BF5XX_I2S || SND_BF5XX_AC97 || SND_BF5XX_TDM)
         range 0 3 if BF54x
         range 0 1 if !BF54x
         default 0