dmaengine: Add support for BCM2708

Add support for DMA controller of BCM2708 as used in the Raspberry Pi.
Currently it only supports cyclic DMA.

Signed-off-by: Florian Meier <florian.meier@koalo.de>

dmaengine: expand functionality by supporting scatter/gather transfers sdhci-bcm2708 and dma.c: fix for LITE channels
ASoC: Add support for BCM2708

This driver adds support for digital audio (I2S)
for the BCM2708 SoC that is used by the
Raspberry Pi. External audio codecs can be
connected to the Raspberry Pi via P5 header.

It relies on cyclic DMA engine support for BCM2708.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
ASoC: Add support for PCM5102A codec

Some definitions to support the PCM5102A codec
by Texas Instruments.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
BCM2708: Add I2S support to board file

Adds the required initializations for I2S
to the board file of mach-bcm2708.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
ASoC: Add support for HifiBerry DAC

This adds a machine driver for the HifiBerry DAC.
It is a sound card that can
be stacked onto the Raspberry Pi.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
BCM2708: Add HifiBerry DAC to board file

This adds the initalization of the HifiBerry DAC
to the mach-bcm2708 board file.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
ASoC: BCM2708: Add 24 bit support

This adds 24 bit support to the I2S driver of the BCM2708.
Besides enabling the 24 bit flags, it includes two bug fixes:

MMAP is not supported. Claiming this leads to strange issues
when the format of driver and file do not match.

The datasheet states that the width extension bit should be set
for widths greater than 24, but greater or equal would be correct.
This follows from the definition of the width field.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
bcm2708-i2s: Update bclk_ratio to more correct values
BCM2708: Add I2S and DMA support to default config

This commit adds several modules that are needed for
I2S support for the Raspberry Pi to the defconfig.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
ASoC: BCM2708: Add support for RPi-DAC

This adds a machine driver for the RPi-DAC.

Signed-off-by: Florian Meier <florian.meier@koalo.de>
ASoC: wm8804: Implement MCLK configuration options, add 32bit support WM8804 can run with PLL frequencies of 256xfs and 128xfs for most sample rates. At 192kHz only 128xfs is supported. The existing driver selects 128xfs automatically for some lower samples rates. By using an additional mclk_div divider, it is now possible to control the behaviour. This allows using 256xfs PLL frequency on all sample rates up to 96kHz. It should allow lower jitter and better signal quality. The behavior has to be controlled by the sound card driver, because some sample frequency share the same setting. e.g. 192kHz and 96kHz use 24.576MHz master clock. The only difference is the MCLK divider.

This also added support for 32bit data.

Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
ASoC: BCM:Add support for HiFiBerry Digi. Driver is based on the patched WM8804 driver.

Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
BCM2708: Added support for HiFiBerry Digi board Board initalization by I2C

Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
BCM2708: Added HiFiBerry Digi configuration option It will be compiled as a module by default. This also includes the WM8804 driver.

Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
ASoC: wm8804: Set idle_bias_off to false Idle bias has been change to remove warning on driver startup

Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
Add IQaudIO Sound Card support for Raspberry Pi
soc-core: Fix volsw_range funcs so SOC_DOUBLE_R_RANGE_TLV works.

This is so that the correct range of values as specified
with the SOC_DOUBLE_R_RANGE_TLV macro are sent to the
hardware for both the normal and invert cases.
pcm512x: Use a range macro for Volume and rename to PCM.

This allows limiting the output gain to avoid clipping in the
DAC ouput stages.
Move GPIO setup to hw_params.

This is used to stop the I2S driver from breaking
the GPIO setup for other uses of the PCM interface
vmstat: Workaround for issue where dirty page count goes negative

See:
https://github.com/raspberrypi/linux/issues/617
http://www.spinics.net/lists/linux-mm/msg72236.html