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6c3d713e6d
There are a few known (minor) problems with having the support code for both I2C
and SPI in the same module:
* We need to be extra careful to make sure to not build the driver into the
kernel if one of the subsystems is build as a module (Currently only I2C
can be build as a module).
* The module init path error handling is rather ugly. E.g. what should be
done if either the SPI or the I2C driver fails to register? Most drivers
that implement SPI and I2C in the same module currently fallback to
undefined behavior in that case. Splitting the the driver into two
modules, one for each bus, allows the registration of the other bus driver
to continue without problems if one of them fails.
This patch splits the AD193X driver into 3 modules. One core module that
implements the device logic, but is independent of the bus method used. And one
module for SPI and I2C each that registers the drivers and sets up the regmap
struct for the bus.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/*
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* AD193X Audio Codec driver
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __AD193X_H__
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#define __AD193X_H__
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#include <linux/regmap.h>
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struct device;
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extern const struct regmap_config ad193x_regmap_config;
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int ad193x_probe(struct device *dev, struct regmap *regmap);
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#define AD193X_PLL_CLK_CTRL0 0x00
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#define AD193X_PLL_POWERDOWN 0x01
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#define AD193X_PLL_INPUT_MASK 0x6
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#define AD193X_PLL_INPUT_256 (0 << 1)
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#define AD193X_PLL_INPUT_384 (1 << 1)
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#define AD193X_PLL_INPUT_512 (2 << 1)
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#define AD193X_PLL_INPUT_768 (3 << 1)
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#define AD193X_PLL_CLK_CTRL1 0x01
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#define AD193X_DAC_CTRL0 0x02
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#define AD193X_DAC_POWERDOWN 0x01
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#define AD193X_DAC_SERFMT_MASK 0xC0
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#define AD193X_DAC_SERFMT_STEREO (0 << 6)
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#define AD193X_DAC_SERFMT_TDM (1 << 6)
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#define AD193X_DAC_CTRL1 0x03
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#define AD193X_DAC_CHAN_SHFT 1
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#define AD193X_DAC_CHAN_MASK (3 << AD193X_DAC_CHAN_SHFT)
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#define AD193X_DAC_LCR_MASTER (1 << 4)
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#define AD193X_DAC_BCLK_MASTER (1 << 5)
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#define AD193X_DAC_LEFT_HIGH (1 << 3)
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#define AD193X_DAC_BCLK_INV (1 << 7)
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#define AD193X_DAC_FMT_MASK (AD193X_DAC_LCR_MASTER | \
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AD193X_DAC_BCLK_MASTER | AD193X_DAC_LEFT_HIGH | AD193X_DAC_BCLK_INV)
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#define AD193X_DAC_CTRL2 0x04
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#define AD193X_DAC_WORD_LEN_SHFT 3
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#define AD193X_DAC_WORD_LEN_MASK 0x18
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#define AD193X_DAC_MASTER_MUTE 1
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#define AD193X_DAC_CHNL_MUTE 0x05
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#define AD193X_DACL1_MUTE 0
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#define AD193X_DACR1_MUTE 1
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#define AD193X_DACL2_MUTE 2
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#define AD193X_DACR2_MUTE 3
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#define AD193X_DACL3_MUTE 4
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#define AD193X_DACR3_MUTE 5
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#define AD193X_DACL4_MUTE 6
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#define AD193X_DACR4_MUTE 7
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#define AD193X_DAC_L1_VOL 0x06
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#define AD193X_DAC_R1_VOL 0x07
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#define AD193X_DAC_L2_VOL 0x08
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#define AD193X_DAC_R2_VOL 0x09
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#define AD193X_DAC_L3_VOL 0x0a
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#define AD193X_DAC_R3_VOL 0x0b
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#define AD193X_DAC_L4_VOL 0x0c
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#define AD193X_DAC_R4_VOL 0x0d
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#define AD193X_ADC_CTRL0 0x0e
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#define AD193X_ADC_POWERDOWN 0x01
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#define AD193X_ADC_HIGHPASS_FILTER 1
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#define AD193X_ADCL1_MUTE 2
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#define AD193X_ADCR1_MUTE 3
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#define AD193X_ADCL2_MUTE 4
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#define AD193X_ADCR2_MUTE 5
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#define AD193X_ADC_CTRL1 0x0f
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#define AD193X_ADC_SERFMT_MASK 0x60
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#define AD193X_ADC_SERFMT_STEREO (0 << 5)
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#define AD193X_ADC_SERFMT_TDM (1 << 5)
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#define AD193X_ADC_SERFMT_AUX (2 << 5)
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#define AD193X_ADC_WORD_LEN_MASK 0x3
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#define AD193X_ADC_CTRL2 0x10
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#define AD193X_ADC_CHAN_SHFT 4
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#define AD193X_ADC_CHAN_MASK (3 << AD193X_ADC_CHAN_SHFT)
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#define AD193X_ADC_LCR_MASTER (1 << 3)
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#define AD193X_ADC_BCLK_MASTER (1 << 6)
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#define AD193X_ADC_LEFT_HIGH (1 << 2)
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#define AD193X_ADC_BCLK_INV (1 << 1)
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#define AD193X_ADC_FMT_MASK (AD193X_ADC_LCR_MASTER | \
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AD193X_ADC_BCLK_MASTER | AD193X_ADC_LEFT_HIGH | AD193X_ADC_BCLK_INV)
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#define AD193X_2_CHANNELS 0
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#define AD193X_4_CHANNELS 1
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#define AD193X_8_CHANNELS 2
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#define AD193X_16_CHANNELS 3
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#define AD193X_NUM_REGS 17
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#endif
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