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ASoC: Add ssm2518 support

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This patch adds a ASoC CODEC driver for the SSM2516. The SSM2516 is a stereo
Class-D audio amplifier with an I2S interface for audio in and a built-in
dynamic range control processor.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen 2013-05-23 20:14:50 +02:00 committed by Mark Brown
parent c7788792a5
commit b6b5e76bb8
6 changed files with 924 additions and 0 deletions
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20
Documentation/devicetree/bindings/sound/ssm2518.txt Normal file
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@ -0,0 +1,20 @@
SSM2518 audio amplifier
This device supports I2C only.
Required properties:
- compatible : Must be "adi,ssm2518"
- reg : the I2C address of the device. This will either be 0x34 (ADDR pin low)
or 0x35 (ADDR pin high)
Optional properties:
- gpios : GPIO connected to the nSD pin. If the property is not present it is
assumed that the nSD pin is hardwired to always on.
Example:
ssm2518: ssm2518@34 {
compatible = "adi,ssm2518";
reg = <0x34>;
gpios = <&gpio 5 0>;
};

22
include/linux/platform_data/ssm2518.h Normal file
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@ -0,0 +1,22 @@
/*
* SSM2518 amplifier audio driver
*
* Copyright 2013 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*
* Licensed under the GPL-2.
*/
#ifndef __LINUX_PLATFORM_DATA_SSM2518_H__
#define __LINUX_PLATFORM_DATA_SSM2518_H__
/**
* struct ssm2518_platform_data - Platform data for the ssm2518 driver
* @enable_gpio: GPIO connected to the nSD pin. Set to -1 if the nSD pin is
* hardwired.
*/
struct ssm2518_platform_data {
int enable_gpio;
};
#endif

4
sound/soc/codecs/Kconfig
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@ -60,6 +60,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_SI476X if MFD_SI476X_CORE
select SND_SOC_SN95031 if INTEL_SCU_IPC
select SND_SOC_SPDIF
select SND_SOC_SSM2518 if I2C
select SND_SOC_SSM2602 if SND_SOC_I2C_AND_SPI
select SND_SOC_STA32X if I2C
select SND_SOC_STA529 if I2C
@ -313,6 +314,9 @@ config SND_SOC_SN95031
config SND_SOC_SPDIF
tristate
config SND_SOC_SSM2518
tristate
config SND_SOC_SSM2602
tristate

2
sound/soc/codecs/Makefile
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@ -52,6 +52,7 @@ snd-soc-si476x-objs := si476x.o
snd-soc-sn95031-objs := sn95031.o
snd-soc-spdif-tx-objs := spdif_transciever.o
snd-soc-spdif-rx-objs := spdif_receiver.o
snd-soc-ssm2518-objs := ssm2518.o
snd-soc-ssm2602-objs := ssm2602.o
snd-soc-sta32x-objs := sta32x.o
snd-soc-sta529-objs := sta529.o
@ -176,6 +177,7 @@ obj-$(CONFIG_SND_SOC_SIGMADSP) += snd-soc-sigmadsp.o
obj-$(CONFIG_SND_SOC_SI476X) += snd-soc-si476x.o
obj-$(CONFIG_SND_SOC_SN95031) +=snd-soc-sn95031.o
obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif-rx.o snd-soc-spdif-tx.o
obj-$(CONFIG_SND_SOC_SSM2518) += snd-soc-ssm2518.o
obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
obj-$(CONFIG_SND_SOC_STA32X) += snd-soc-sta32x.o
obj-$(CONFIG_SND_SOC_STA529) += snd-soc-sta529.o

856
sound/soc/codecs/ssm2518.c Normal file
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@ -0,0 +1,856 @@
/*
* SSM2518 amplifier audio driver
*
* Copyright 2013 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/platform_data/ssm2518.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "ssm2518.h"
#define SSM2518_REG_POWER1 0x00
#define SSM2518_REG_CLOCK 0x01
#define SSM2518_REG_SAI_CTRL1 0x02
#define SSM2518_REG_SAI_CTRL2 0x03
#define SSM2518_REG_CHAN_MAP 0x04
#define SSM2518_REG_LEFT_VOL 0x05
#define SSM2518_REG_RIGHT_VOL 0x06
#define SSM2518_REG_MUTE_CTRL 0x07
#define SSM2518_REG_FAULT_CTRL 0x08
#define SSM2518_REG_POWER2 0x09
#define SSM2518_REG_DRC_1 0x0a
#define SSM2518_REG_DRC_2 0x0b
#define SSM2518_REG_DRC_3 0x0c
#define SSM2518_REG_DRC_4 0x0d
#define SSM2518_REG_DRC_5 0x0e
#define SSM2518_REG_DRC_6 0x0f
#define SSM2518_REG_DRC_7 0x10
#define SSM2518_REG_DRC_8 0x11
#define SSM2518_REG_DRC_9 0x12
#define SSM2518_POWER1_RESET BIT(7)
#define SSM2518_POWER1_NO_BCLK BIT(5)
#define SSM2518_POWER1_MCS_MASK (0xf << 1)
#define SSM2518_POWER1_MCS_64FS (0x0 << 1)
#define SSM2518_POWER1_MCS_128FS (0x1 << 1)
#define SSM2518_POWER1_MCS_256FS (0x2 << 1)
#define SSM2518_POWER1_MCS_384FS (0x3 << 1)
#define SSM2518_POWER1_MCS_512FS (0x4 << 1)
#define SSM2518_POWER1_MCS_768FS (0x5 << 1)
#define SSM2518_POWER1_MCS_100FS (0x6 << 1)
#define SSM2518_POWER1_MCS_200FS (0x7 << 1)
#define SSM2518_POWER1_MCS_400FS (0x8 << 1)
#define SSM2518_POWER1_SPWDN BIT(0)
#define SSM2518_CLOCK_ASR BIT(0)
#define SSM2518_SAI_CTRL1_FMT_MASK (0x3 << 5)
#define SSM2518_SAI_CTRL1_FMT_I2S (0x0 << 5)
#define SSM2518_SAI_CTRL1_FMT_LJ (0x1 << 5)
#define SSM2518_SAI_CTRL1_FMT_RJ_24BIT (0x2 << 5)
#define SSM2518_SAI_CTRL1_FMT_RJ_16BIT (0x3 << 5)
#define SSM2518_SAI_CTRL1_SAI_MASK (0x7 << 2)
#define SSM2518_SAI_CTRL1_SAI_I2S (0x0 << 2)
#define SSM2518_SAI_CTRL1_SAI_TDM_2 (0x1 << 2)
#define SSM2518_SAI_CTRL1_SAI_TDM_4 (0x2 << 2)
#define SSM2518_SAI_CTRL1_SAI_TDM_8 (0x3 << 2)
#define SSM2518_SAI_CTRL1_SAI_TDM_16 (0x4 << 2)
#define SSM2518_SAI_CTRL1_SAI_MONO (0x5 << 2)
#define SSM2518_SAI_CTRL1_FS_MASK (0x3)
#define SSM2518_SAI_CTRL1_FS_8000_12000 (0x0)
#define SSM2518_SAI_CTRL1_FS_16000_24000 (0x1)
#define SSM2518_SAI_CTRL1_FS_32000_48000 (0x2)
#define SSM2518_SAI_CTRL1_FS_64000_96000 (0x3)
#define SSM2518_SAI_CTRL2_BCLK_INTERAL BIT(7)
#define SSM2518_SAI_CTRL2_LRCLK_PULSE BIT(6)
#define SSM2518_SAI_CTRL2_LRCLK_INVERT BIT(5)
#define SSM2518_SAI_CTRL2_MSB BIT(4)
#define SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK (0x3 << 2)
#define SSM2518_SAI_CTRL2_SLOT_WIDTH_32 (0x0 << 2)
#define SSM2518_SAI_CTRL2_SLOT_WIDTH_24 (0x1 << 2)
#define SSM2518_SAI_CTRL2_SLOT_WIDTH_16 (0x2 << 2)
#define SSM2518_SAI_CTRL2_BCLK_INVERT BIT(1)
#define SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET 4
#define SSM2518_CHAN_MAP_RIGHT_SLOT_MASK 0xf0
#define SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET 0
#define SSM2518_CHAN_MAP_LEFT_SLOT_MASK 0x0f
#define SSM2518_MUTE_CTRL_ANA_GAIN BIT(5)
#define SSM2518_MUTE_CTRL_MUTE_MASTER BIT(0)
#define SSM2518_POWER2_APWDN BIT(0)
#define SSM2518_DAC_MUTE BIT(6)
#define SSM2518_DAC_FS_MASK 0x07
#define SSM2518_DAC_FS_8000 0x00
#define SSM2518_DAC_FS_16000 0x01
#define SSM2518_DAC_FS_32000 0x02
#define SSM2518_DAC_FS_64000 0x03
#define SSM2518_DAC_FS_128000 0x04
struct ssm2518 {
struct regmap *regmap;
bool right_j;
unsigned int sysclk;
const struct snd_pcm_hw_constraint_list *constraints;
int enable_gpio;
};
static const struct reg_default ssm2518_reg_defaults[] = {
{ 0x00, 0x05 },
{ 0x01, 0x00 },
{ 0x02, 0x02 },
{ 0x03, 0x00 },
{ 0x04, 0x10 },
{ 0x05, 0x40 },
{ 0x06, 0x40 },
{ 0x07, 0x81 },
{ 0x08, 0x0c },
{ 0x09, 0x99 },
{ 0x0a, 0x7c },
{ 0x0b, 0x5b },
{ 0x0c, 0x57 },
{ 0x0d, 0x89 },
{ 0x0e, 0x8c },
{ 0x0f, 0x77 },
{ 0x10, 0x26 },
{ 0x11, 0x1c },
{ 0x12, 0x97 },
};
static const DECLARE_TLV_DB_MINMAX_MUTE(ssm2518_vol_tlv, -7125, 2400);
static const DECLARE_TLV_DB_SCALE(ssm2518_compressor_tlv, -3400, 200, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_expander_tlv, -8100, 300, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_noise_gate_tlv, -9600, 300, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_post_drc_tlv, -2400, 300, 0);
static const DECLARE_TLV_DB_RANGE(ssm2518_limiter_tlv,
0, 7, TLV_DB_SCALE_ITEM(-2200, 200, 0),
7, 15, TLV_DB_SCALE_ITEM(-800, 100, 0),
);
static const char * const ssm2518_drc_peak_detector_attack_time_text[] = {
"0 ms", "0.1 ms", "0.19 ms", "0.37 ms", "0.75 ms", "1.5 ms", "3 ms",
"6 ms", "12 ms", "24 ms", "48 ms", "96 ms", "192 ms", "384 ms",
"768 ms", "1536 ms",
};
static const char * const ssm2518_drc_peak_detector_release_time_text[] = {
"0 ms", "1.5 ms", "3 ms", "6 ms", "12 ms", "24 ms", "48 ms", "96 ms",
"192 ms", "384 ms", "768 ms", "1536 ms", "3072 ms", "6144 ms",
"12288 ms", "24576 ms"
};
static const char * const ssm2518_drc_hold_time_text[] = {
"0 ms", "0.67 ms", "1.33 ms", "2.67 ms", "5.33 ms", "10.66 ms",
"21.32 ms", "42.64 ms", "85.28 ms", "170.56 ms", "341.12 ms",
"682.24 ms", "1364 ms",
};
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_attack_time_enum,
SSM2518_REG_DRC_2, 4, ssm2518_drc_peak_detector_attack_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_release_time_enum,
SSM2518_REG_DRC_2, 0, ssm2518_drc_peak_detector_release_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_attack_time_enum,
SSM2518_REG_DRC_6, 4, ssm2518_drc_peak_detector_attack_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_decay_time_enum,
SSM2518_REG_DRC_6, 0, ssm2518_drc_peak_detector_release_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_hold_time_enum,
SSM2518_REG_DRC_7, 4, ssm2518_drc_hold_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_noise_gate_hold_time_enum,
SSM2518_REG_DRC_7, 0, ssm2518_drc_hold_time_text);
static const SOC_ENUM_SINGLE_DECL(ssm2518_drc_rms_averaging_time_enum,
SSM2518_REG_DRC_9, 0, ssm2518_drc_peak_detector_release_time_text);
static const struct snd_kcontrol_new ssm2518_snd_controls[] = {
SOC_SINGLE("Playback De-emphasis Switch", SSM2518_REG_MUTE_CTRL,
4, 1, 0),
SOC_DOUBLE_R_TLV("Master Playback Volume", SSM2518_REG_LEFT_VOL,
SSM2518_REG_RIGHT_VOL, 0, 0xff, 1, ssm2518_vol_tlv),
SOC_DOUBLE("Master Playback Switch", SSM2518_REG_MUTE_CTRL, 2, 1, 1, 1),
SOC_SINGLE("Amp Low Power Mode Switch", SSM2518_REG_POWER2, 4, 1, 0),
SOC_SINGLE("DAC Low Power Mode Switch", SSM2518_REG_POWER2, 3, 1, 0),
SOC_SINGLE("DRC Limiter Switch", SSM2518_REG_DRC_1, 5, 1, 0),
SOC_SINGLE("DRC Compressor Switch", SSM2518_REG_DRC_1, 4, 1, 0),
SOC_SINGLE("DRC Expander Switch", SSM2518_REG_DRC_1, 3, 1, 0),
SOC_SINGLE("DRC Noise Gate Switch", SSM2518_REG_DRC_1, 2, 1, 0),
SOC_DOUBLE("DRC Switch", SSM2518_REG_DRC_1, 0, 1, 1, 0),
SOC_SINGLE_TLV("DRC Limiter Threshold Volume",
SSM2518_REG_DRC_3, 4, 15, 1, ssm2518_limiter_tlv),
SOC_SINGLE_TLV("DRC Compressor Lower Threshold Volume",
SSM2518_REG_DRC_3, 0, 15, 1, ssm2518_compressor_tlv),
SOC_SINGLE_TLV("DRC Expander Upper Threshold Volume", SSM2518_REG_DRC_4,
4, 15, 1, ssm2518_expander_tlv),
SOC_SINGLE_TLV("DRC Noise Gate Threshold Volume",
SSM2518_REG_DRC_4, 0, 15, 1, ssm2518_noise_gate_tlv),
SOC_SINGLE_TLV("DRC Upper Output Threshold Volume",
SSM2518_REG_DRC_5, 4, 15, 1, ssm2518_limiter_tlv),
SOC_SINGLE_TLV("DRC Lower Output Threshold Volume",
SSM2518_REG_DRC_5, 0, 15, 1, ssm2518_noise_gate_tlv),
SOC_SINGLE_TLV("DRC Post Volume", SSM2518_REG_DRC_8,
2, 15, 1, ssm2518_post_drc_tlv),
SOC_ENUM("DRC Peak Detector Attack Time",
ssm2518_drc_peak_detector_attack_time_enum),
SOC_ENUM("DRC Peak Detector Release Time",
ssm2518_drc_peak_detector_release_time_enum),
SOC_ENUM("DRC Attack Time", ssm2518_drc_attack_time_enum),
SOC_ENUM("DRC Decay Time", ssm2518_drc_decay_time_enum),
SOC_ENUM("DRC Hold Time", ssm2518_drc_hold_time_enum),
SOC_ENUM("DRC Noise Gate Hold Time",
ssm2518_drc_noise_gate_hold_time_enum),
SOC_ENUM("DRC RMS Averaging Time", ssm2518_drc_rms_averaging_time_enum),
};
static const struct snd_soc_dapm_widget ssm2518_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", "HiFi Playback", SSM2518_REG_POWER2, 1, 1),
SND_SOC_DAPM_DAC("DACR", "HiFi Playback", SSM2518_REG_POWER2, 2, 1),
SND_SOC_DAPM_OUTPUT("OUTL"),
SND_SOC_DAPM_OUTPUT("OUTR"),
};
static const struct snd_soc_dapm_route ssm2518_routes[] = {
{ "OUTL", NULL, "DACL" },
{ "OUTR", NULL, "DACR" },
};
struct ssm2518_mcs_lut {
unsigned int rate;
const unsigned int *sysclks;
};
static const unsigned int ssm2518_sysclks_2048000[] = {
2048000, 4096000, 8192000, 12288000, 16384000, 24576000,
3200000, 6400000, 12800000, 0
};
static const unsigned int ssm2518_sysclks_2822000[] = {
2822000, 5644800, 11289600, 16934400, 22579200, 33868800,
4410000, 8820000, 17640000, 0
};
static const unsigned int ssm2518_sysclks_3072000[] = {
3072000, 6144000, 12288000, 16384000, 24576000, 38864000,
4800000, 9600000, 19200000, 0
};
static const struct ssm2518_mcs_lut ssm2518_mcs_lut[] = {
{ 8000, ssm2518_sysclks_2048000, },
{ 11025, ssm2518_sysclks_2822000, },
{ 12000, ssm2518_sysclks_3072000, },
{ 16000, ssm2518_sysclks_2048000, },
{ 24000, ssm2518_sysclks_3072000, },
{ 22050, ssm2518_sysclks_2822000, },
{ 32000, ssm2518_sysclks_2048000, },
{ 44100, ssm2518_sysclks_2822000, },
{ 48000, ssm2518_sysclks_3072000, },
{ 96000, ssm2518_sysclks_3072000, },
};
static const unsigned int ssm2518_rates_2048000[] = {
8000, 16000, 32000,
};
static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2048000 = {
.list = ssm2518_rates_2048000,
.count = ARRAY_SIZE(ssm2518_rates_2048000),
};
static const unsigned int ssm2518_rates_2822000[] = {
11025, 22050, 44100,
};
static const struct snd_pcm_hw_constraint_list ssm2518_constraints_2822000 = {
.list = ssm2518_rates_2822000,
.count = ARRAY_SIZE(ssm2518_rates_2822000),
};
static const unsigned int ssm2518_rates_3072000[] = {
12000, 24000, 48000, 96000,
};
static const struct snd_pcm_hw_constraint_list ssm2518_constraints_3072000 = {
.list = ssm2518_rates_3072000,
.count = ARRAY_SIZE(ssm2518_rates_3072000),
};
static const unsigned int ssm2518_rates_12288000[] = {
8000, 12000, 16000, 24000, 32000, 48000, 96000,
};
static const struct snd_pcm_hw_constraint_list ssm2518_constraints_12288000 = {
.list = ssm2518_rates_12288000,
.count = ARRAY_SIZE(ssm2518_rates_12288000),
};
static unsigned int ssm2518_lookup_mcs(struct ssm2518 *ssm2518,
unsigned int rate)
{
const unsigned int *sysclks = NULL;
int i;
for (i = 0; i < ARRAY_SIZE(ssm2518_mcs_lut); i++) {
if (ssm2518_mcs_lut[i].rate == rate) {
sysclks = ssm2518_mcs_lut[i].sysclks;
break;
}
}
if (!sysclks)
return -EINVAL;
for (i = 0; sysclks[i]; i++) {
if (sysclks[i] == ssm2518->sysclk)
return i;
}
return -EINVAL;
}
static int ssm2518_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
unsigned int rate = params_rate(params);
unsigned int ctrl1, ctrl1_mask;
int mcs;
int ret;
mcs = ssm2518_lookup_mcs(ssm2518, rate);
if (mcs < 0)
return mcs;
ctrl1_mask = SSM2518_SAI_CTRL1_FS_MASK;
if (rate >= 8000 && rate <= 12000)
ctrl1 = SSM2518_SAI_CTRL1_FS_8000_12000;
else if (rate >= 16000 && rate <= 24000)
ctrl1 = SSM2518_SAI_CTRL1_FS_16000_24000;
else if (rate >= 32000 && rate <= 48000)
ctrl1 = SSM2518_SAI_CTRL1_FS_32000_48000;
else if (rate >= 64000 && rate <= 96000)
ctrl1 = SSM2518_SAI_CTRL1_FS_64000_96000;
else
return -EINVAL;
if (ssm2518->right_j) {
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_16BIT;
break;
case SNDRV_PCM_FORMAT_S24_LE:
ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT;
break;
default:
return -EINVAL;
}
ctrl1_mask |= SSM2518_SAI_CTRL1_FMT_MASK;
}
/* Disable auto samplerate detection */
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_CLOCK,
SSM2518_CLOCK_ASR, SSM2518_CLOCK_ASR);
if (ret < 0)
return ret;
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1,
ctrl1_mask, ctrl1);
if (ret < 0)
return ret;
return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
SSM2518_POWER1_MCS_MASK, mcs << 1);
}
static int ssm2518_mute(struct snd_soc_dai *dai, int mute)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
unsigned int val;
if (mute)
val = SSM2518_MUTE_CTRL_MUTE_MASTER;
else
val = 0;
return regmap_update_bits(ssm2518->regmap, SSM2518_REG_MUTE_CTRL,
SSM2518_MUTE_CTRL_MUTE_MASTER, val);
}
static int ssm2518_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
unsigned int ctrl1 = 0, ctrl2 = 0;
bool invert_fclk;
int ret;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
invert_fclk = false;
break;
case SND_SOC_DAIFMT_IB_NF:
ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT;
invert_fclk = false;
break;
case SND_SOC_DAIFMT_NB_IF:
invert_fclk = true;
break;
case SND_SOC_DAIFMT_IB_IF:
ctrl2 |= SSM2518_SAI_CTRL2_BCLK_INVERT;
invert_fclk = true;
break;
default:
return -EINVAL;
}
ssm2518->right_j = false;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ;
invert_fclk = !invert_fclk;
break;
case SND_SOC_DAIFMT_RIGHT_J:
ctrl1 |= SSM2518_SAI_CTRL1_FMT_RJ_24BIT;
ssm2518->right_j = true;
invert_fclk = !invert_fclk;
break;
case SND_SOC_DAIFMT_DSP_A:
ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE;
ctrl1 |= SSM2518_SAI_CTRL1_FMT_I2S;
invert_fclk = false;
break;
case SND_SOC_DAIFMT_DSP_B:
ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_PULSE;
ctrl1 |= SSM2518_SAI_CTRL1_FMT_LJ;
invert_fclk = false;
break;
default:
return -EINVAL;
}
if (invert_fclk)
ctrl2 |= SSM2518_SAI_CTRL2_LRCLK_INVERT;
ret = regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL1, ctrl1);
if (ret)
return ret;
return regmap_write(ssm2518->regmap, SSM2518_REG_SAI_CTRL2, ctrl2);
}
static int ssm2518_set_power(struct ssm2518 *ssm2518, bool enable)
{
int ret = 0;
if (!enable) {
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
SSM2518_POWER1_SPWDN, SSM2518_POWER1_SPWDN);
regcache_mark_dirty(ssm2518->regmap);
}
if (gpio_is_valid(ssm2518->enable_gpio))
gpio_set_value(ssm2518->enable_gpio, enable);
regcache_cache_only(ssm2518->regmap, !enable);
if (enable) {
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
SSM2518_POWER1_SPWDN | SSM2518_POWER1_RESET, 0x00);
regcache_sync(ssm2518->regmap);
}
return ret;
}
static int ssm2518_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
int ret = 0;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
ret = ssm2518_set_power(ssm2518, true);
break;
case SND_SOC_BIAS_OFF:
ret = ssm2518_set_power(ssm2518, false);
break;
}
if (ret)
return ret;
codec->dapm.bias_level = level;
return 0;
}
static int ssm2518_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int width)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
unsigned int ctrl1, ctrl2;
int left_slot, right_slot;
int ret;
if (slots == 0)
return regmap_update_bits(ssm2518->regmap,
SSM2518_REG_SAI_CTRL1, SSM2518_SAI_CTRL1_SAI_MASK,
SSM2518_SAI_CTRL1_SAI_I2S);
if (tx_mask == 0 || tx_mask != 0)
return -EINVAL;
if (slots == 1) {
if (tx_mask != 1)
return -EINVAL;
left_slot = 0;
right_slot = 0;
} else {
/* We assume the left channel < right channel */
left_slot = ffs(tx_mask);
tx_mask &= ~(1 << tx_mask);
if (tx_mask == 0) {
right_slot = left_slot;
} else {
right_slot = ffs(tx_mask);
tx_mask &= ~(1 << tx_mask);
}
}
if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
return -EINVAL;
switch (width) {
case 16:
ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_16;
break;
case 24:
ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_24;
break;
case 32:
ctrl2 = SSM2518_SAI_CTRL2_SLOT_WIDTH_32;
break;
default:
return -EINVAL;
}
switch (slots) {
case 1:
ctrl1 = SSM2518_SAI_CTRL1_SAI_MONO;
break;
case 2:
ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_2;
break;
case 4:
ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_4;
break;
case 8:
ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_8;
break;
case 16:
ctrl1 = SSM2518_SAI_CTRL1_SAI_TDM_16;
break;
default:
return -EINVAL;
}
ret = regmap_write(ssm2518->regmap, SSM2518_REG_CHAN_MAP,
(left_slot << SSM2518_CHAN_MAP_LEFT_SLOT_OFFSET) |
(right_slot << SSM2518_CHAN_MAP_RIGHT_SLOT_OFFSET));
if (ret)
return ret;
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL1,
SSM2518_SAI_CTRL1_SAI_MASK, ctrl1);
if (ret)
return ret;
return regmap_update_bits(ssm2518->regmap, SSM2518_REG_SAI_CTRL2,
SSM2518_SAI_CTRL2_SLOT_WIDTH_MASK, ctrl2);
}
static int ssm2518_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(dai->codec);
if (ssm2518->constraints)
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, ssm2518->constraints);
return 0;
}
#define SSM2518_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
static const struct snd_soc_dai_ops ssm2518_dai_ops = {
.startup = ssm2518_startup,
.hw_params = ssm2518_hw_params,
.digital_mute = ssm2518_mute,
.set_fmt = ssm2518_set_dai_fmt,
.set_tdm_slot = ssm2518_set_tdm_slot,
};
static struct snd_soc_dai_driver ssm2518_dai = {
.name = "ssm2518-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SSM2518_FORMATS,
},
.ops = &ssm2518_dai_ops,
};
static int ssm2518_probe(struct snd_soc_codec *codec)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
int ret;
codec->control_data = ssm2518->regmap;
ret = snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
return ssm2518_set_bias_level(codec, SND_SOC_BIAS_OFF);
}
static int ssm2518_remove(struct snd_soc_codec *codec)
{
ssm2518_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int ssm2518_set_sysclk(struct snd_soc_codec *codec, int clk_id,
int source, unsigned int freq, int dir)
{
struct ssm2518 *ssm2518 = snd_soc_codec_get_drvdata(codec);
unsigned int val;
if (clk_id != SSM2518_SYSCLK)
return -EINVAL;
switch (source) {
case SSM2518_SYSCLK_SRC_MCLK:
val = 0;
break;
case SSM2518_SYSCLK_SRC_BCLK:
/* In this case the bitclock is used as the system clock, and
* the bitclock signal needs to be connected to the MCLK pin and
* the BCLK pin is left unconnected */
val = SSM2518_POWER1_NO_BCLK;
break;
default:
return -EINVAL;
}
switch (freq) {
case 0:
ssm2518->constraints = NULL;
break;
case 2048000:
case 4096000:
case 8192000:
case 3200000:
case 6400000:
case 12800000:
ssm2518->constraints = &ssm2518_constraints_2048000;
break;
case 2822000:
case 5644800:
case 11289600:
case 16934400:
case 22579200:
case 33868800:
case 4410000:
case 8820000:
case 17640000:
ssm2518->constraints = &ssm2518_constraints_2822000;
break;
case 3072000:
case 6144000:
case 38864000:
case 4800000:
case 9600000:
case 19200000:
ssm2518->constraints = &ssm2518_constraints_3072000;
break;
case 12288000:
case 16384000:
case 24576000:
ssm2518->constraints = &ssm2518_constraints_12288000;
break;
default:
return -EINVAL;
}
ssm2518->sysclk = freq;
return regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER1,
SSM2518_POWER1_NO_BCLK, val);
}
static struct snd_soc_codec_driver ssm2518_codec_driver = {
.probe = ssm2518_probe,
.remove = ssm2518_remove,
.set_bias_level = ssm2518_set_bias_level,
.set_sysclk = ssm2518_set_sysclk,
.idle_bias_off = true,
.controls = ssm2518_snd_controls,
.num_controls = ARRAY_SIZE(ssm2518_snd_controls),
.dapm_widgets = ssm2518_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ssm2518_dapm_widgets),
.dapm_routes = ssm2518_routes,
.num_dapm_routes = ARRAY_SIZE(ssm2518_routes),
};
static bool ssm2518_register_volatile(struct device *dev, unsigned int reg)
{
return false;
}
static const struct regmap_config ssm2518_regmap_config = {
.val_bits = 8,
.reg_bits = 8,
.max_register = SSM2518_REG_DRC_9,
.volatile_reg = ssm2518_register_volatile,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = ssm2518_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(ssm2518_reg_defaults),
};
static int ssm2518_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ssm2518_platform_data *pdata = i2c->dev.platform_data;
struct ssm2518 *ssm2518;
int ret;
ssm2518 = devm_kzalloc(&i2c->dev, sizeof(*ssm2518), GFP_KERNEL);
if (ssm2518 == NULL)
return -ENOMEM;
if (pdata) {
ssm2518->enable_gpio = pdata->enable_gpio;
} else if (i2c->dev.of_node) {
ssm2518->enable_gpio = of_get_gpio(i2c->dev.of_node, 0);
if (ssm2518->enable_gpio < 0 && ssm2518->enable_gpio != -ENOENT)
return ssm2518->enable_gpio;
} else {
ssm2518->enable_gpio = -1;
}
if (gpio_is_valid(ssm2518->enable_gpio)) {
ret = devm_gpio_request_one(&i2c->dev, ssm2518->enable_gpio,
GPIOF_OUT_INIT_HIGH, "SSM2518 nSD");
if (ret)
return ret;
}
i2c_set_clientdata(i2c, ssm2518);
ssm2518->regmap = devm_regmap_init_i2c(i2c, &ssm2518_regmap_config);
if (IS_ERR(ssm2518->regmap))
return PTR_ERR(ssm2518->regmap);
/*
* The reset bit is obviously volatile, but we need to be able to cache
* the other bits in the register, so we can't just mark the whole
* register as volatile. Since this is the only place where we'll ever
* touch the reset bit just bypass the cache for this operation.
*/
regcache_cache_bypass(ssm2518->regmap, true);
ret = regmap_write(ssm2518->regmap, SSM2518_REG_POWER1,
SSM2518_POWER1_RESET);
regcache_cache_bypass(ssm2518->regmap, false);
if (ret)
return ret;
ret = regmap_update_bits(ssm2518->regmap, SSM2518_REG_POWER2,
SSM2518_POWER2_APWDN, 0x00);
if (ret)
return ret;
ret = ssm2518_set_power(ssm2518, false);
if (ret)
return ret;
return snd_soc_register_codec(&i2c->dev, &ssm2518_codec_driver,
&ssm2518_dai, 1);
}
static int ssm2518_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id ssm2518_i2c_ids[] = {
{ "ssm2518", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ssm2518_i2c_ids);
static struct i2c_driver ssm2518_driver = {
.driver = {
.name = "ssm2518",
.owner = THIS_MODULE,
},
.probe = ssm2518_i2c_probe,
.remove = ssm2518_i2c_remove,
.id_table = ssm2518_i2c_ids,
};
module_i2c_driver(ssm2518_driver);
MODULE_DESCRIPTION("ASoC SSM2518 driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");

20
sound/soc/codecs/ssm2518.h Normal file
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@ -0,0 +1,20 @@
/*
* SSM2518 amplifier audio driver
*
* Copyright 2013 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*
* Licensed under the GPL-2.
*/
#ifndef __SND_SOC_CODECS_SSM2518_H__
#define __SND_SOC_CODECS_SSM2518_H__
#define SSM2518_SYSCLK 0
enum ssm2518_sysclk_src {
SSM2518_SYSCLK_SRC_MCLK = 0,
SSM2518_SYSCLK_SRC_BCLK = 1,
};
#endif