Skip to content

R
raspberrypi-kernel

openeuler / raspberrypi-kernel

通知 13
Star 1
Fork 0
R
raspberrypi-kernel
切换分支/标签
  1. 15 10月, 2009 2 次提交
    • P
      ASoC: Codec driver for Texas Instruments tlv320dac33 codec · c8bf93f0
      由 Peter Ujfalusi 提交于 
      Driver for Texas Instruments TLV320DAC33 (SLAS546) low power stereo
audio DAC.

TLV320DAC33 is a stereo audio codec with integrated 24KB FIFO for low
power audio playback.

The digital interface can use I2S, DSP (A or B), Right and Left
justified formats.
DAC33 has stereo analog input, which can be bypassed to the analog
outputs.

Regarding to the internal 24KB FIFO the driver implements 'FIFO bypass'
mode (default) and nSample mode (FIFO is in use).
a) In 'FIFO bypass' mode the internal FIFO is not in use, the codec is
working synchronously as a normal codec (it needs constant stream of
data on the digital interface).

b) The nSample mode implementation uses one interrupt line from DAC33 to
the host:
Alarm threshold is set to 10ms of audio data (limit by the driver
implementation).
DAC33 will signal an interrupt, when the FIFO level goes under the
Alarm threshold.
The host will write to nSample register a value (number of stereo
samples), to tell DAC33 how many samples it should read in a burst from
the host. When the DAC33 received the number of samples, it disables the
clocks on the I2S bus. When the FIFO use again goes under the Alarm
threshold, DAC33 signals the host with an interrupt, and the process is
repeated.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      c8bf93f0
    • M
      ASoC: Remove snd_soc_suspend_device() · d2058b0c
      由 Mark Brown 提交于 
      The PM core will grow pm_link infrastructure in 2.6.33 which can be
used to implement the intended functionality of the ASoC-specific
device suspend and resume callbacks so drop them.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      d2058b0c
  3. 12 10月, 2009 1 次提交
  5. 10 10月, 2009 2 次提交
    • M
      ASoC: Minor fixups to tpa6130a2 driver · ebab1b1d
      由 Mark Brown 提交于 
      - Staticise ttpa6130a2_client.
- Remove unneeded cast from void.
- Use explict NULL rather than 0.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      ebab1b1d
    • P
      ASoC: TPA6130A2 amplifier driver · 493b67ef
      由 Peter Ujfalusi 提交于 
      Driver for Texas Instruments TPA6130A2 stereo headphone
amplifier.

The driver provides playback gain control and also pre-defined
DAPM_HP widgets and DAPM routings for power management.

The DAPM_HP widget names are:
"TPA6130A2 Headphone Left"
"TPA6130A2 Headphone Right"

From soc machine drivers to use with the tpa6130a2 amplifier,
the tpa6130a2_add_controls has to be called, which adds the alsa
controls and the DAPM routing needed for the tpa6130a2.
After that the machine driver can connect the codec's output
with 'TPA6130A2 Left' and 'TPA6130A2 Right':

        {"TPA6130A2 Left", NULL, "CODEC LEFT OUT"},
        {"TPA6130A2 Right", NULL, "CODEC RIGHT OUT"},

Internally the left and right channels are powered separately.
When none of the channels are needed the amplifier is powered
down:
hard power: valid GPIO number is passed within platform data
soft power: Using the software shutdown of the amplifier
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      493b67ef
  7. 07 10月, 2009 1 次提交
  9. 02 10月, 2009 1 次提交
  11. 01 10月, 2009 1 次提交
  13. 30 9月, 2009 2 次提交
  15. 22 9月, 2009 2 次提交
  17. 21 9月, 2009 1 次提交
  19. 17 9月, 2009 1 次提交
  21. 10 9月, 2009 1 次提交
  23. 08 9月, 2009 1 次提交
  25. 06 9月, 2009 1 次提交
  27. 03 9月, 2009 1 次提交
  29. 01 9月, 2009 1 次提交
  31. 26 8月, 2009 2 次提交
  33. 24 8月, 2009 1 次提交
  35. 23 8月, 2009 1 次提交
  37. 21 8月, 2009 2 次提交
  39. 19 8月, 2009 6 次提交
  41. 18 8月, 2009 4 次提交
  43. 17 8月, 2009 1 次提交
  45. 15 8月, 2009 3 次提交
  47. 14 8月, 2009 1 次提交