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/*
* SSM4567 amplifier audio driver
*
* Copyright 2014 Google Chromium project.
* Author: Anatol Pomozov <anatol@chromium.org>
*
* Based on code copyright/by:
* Copyright 2013 Analog Devices Inc.
*
* 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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#define SSM4567_REG_POWER_CTRL 0x00
#define SSM4567_REG_AMP_SNS_CTRL 0x01
#define SSM4567_REG_DAC_CTRL 0x02
#define SSM4567_REG_DAC_VOLUME 0x03
#define SSM4567_REG_SAI_CTRL_1 0x04
#define SSM4567_REG_SAI_CTRL_2 0x05
#define SSM4567_REG_SAI_PLACEMENT_1 0x06
#define SSM4567_REG_SAI_PLACEMENT_2 0x07
#define SSM4567_REG_SAI_PLACEMENT_3 0x08
#define SSM4567_REG_SAI_PLACEMENT_4 0x09
#define SSM4567_REG_SAI_PLACEMENT_5 0x0a
#define SSM4567_REG_SAI_PLACEMENT_6 0x0b
#define SSM4567_REG_BATTERY_V_OUT 0x0c
#define SSM4567_REG_LIMITER_CTRL_1 0x0d
#define SSM4567_REG_LIMITER_CTRL_2 0x0e
#define SSM4567_REG_LIMITER_CTRL_3 0x0f
#define SSM4567_REG_STATUS_1 0x10
#define SSM4567_REG_STATUS_2 0x11
#define SSM4567_REG_FAULT_CTRL 0x12
#define SSM4567_REG_PDM_CTRL 0x13
#define SSM4567_REG_MCLK_RATIO 0x14
#define SSM4567_REG_BOOST_CTRL_1 0x15
#define SSM4567_REG_BOOST_CTRL_2 0x16
#define SSM4567_REG_SOFT_RESET 0xff
/* POWER_CTRL */
#define SSM4567_POWER_APWDN_EN BIT(7)
#define SSM4567_POWER_BSNS_PWDN BIT(6)
#define SSM4567_POWER_VSNS_PWDN BIT(5)
#define SSM4567_POWER_ISNS_PWDN BIT(4)
#define SSM4567_POWER_BOOST_PWDN BIT(3)
#define SSM4567_POWER_AMP_PWDN BIT(2)
#define SSM4567_POWER_VBAT_ONLY BIT(1)
#define SSM4567_POWER_SPWDN BIT(0)
/* DAC_CTRL */
#define SSM4567_DAC_HV BIT(7)
#define SSM4567_DAC_MUTE BIT(6)
#define SSM4567_DAC_HPF BIT(5)
#define SSM4567_DAC_LPM BIT(4)
#define SSM4567_DAC_FS_MASK 0x7
#define SSM4567_DAC_FS_8000_12000 0x0
#define SSM4567_DAC_FS_16000_24000 0x1
#define SSM4567_DAC_FS_32000_48000 0x2
#define SSM4567_DAC_FS_64000_96000 0x3
#define SSM4567_DAC_FS_128000_192000 0x4
/* SAI_CTRL_1 */
#define SSM4567_SAI_CTRL_1_BCLK BIT(6)
#define SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK (0x3 << 4)
#define SSM4567_SAI_CTRL_1_TDM_BLCKS_32 (0x0 << 4)
#define SSM4567_SAI_CTRL_1_TDM_BLCKS_48 (0x1 << 4)
#define SSM4567_SAI_CTRL_1_TDM_BLCKS_64 (0x2 << 4)
#define SSM4567_SAI_CTRL_1_FSYNC BIT(3)
#define SSM4567_SAI_CTRL_1_LJ BIT(2)
#define SSM4567_SAI_CTRL_1_TDM BIT(1)
#define SSM4567_SAI_CTRL_1_PDM BIT(0)
/* SAI_CTRL_2 */
#define SSM4567_SAI_CTRL_2_AUTO_SLOT BIT(3)
#define SSM4567_SAI_CTRL_2_TDM_SLOT_MASK 0x7
#define SSM4567_SAI_CTRL_2_TDM_SLOT(x) (x)
struct ssm4567 {
struct regmap *regmap;
};
static const struct reg_default ssm4567_reg_defaults[] = {
{ SSM4567_REG_POWER_CTRL, 0x81 },
{ SSM4567_REG_AMP_SNS_CTRL, 0x09 },
{ SSM4567_REG_DAC_CTRL, 0x32 },
{ SSM4567_REG_DAC_VOLUME, 0x40 },
{ SSM4567_REG_SAI_CTRL_1, 0x00 },
{ SSM4567_REG_SAI_CTRL_2, 0x08 },
{ SSM4567_REG_SAI_PLACEMENT_1, 0x01 },
{ SSM4567_REG_SAI_PLACEMENT_2, 0x20 },
{ SSM4567_REG_SAI_PLACEMENT_3, 0x32 },
{ SSM4567_REG_SAI_PLACEMENT_4, 0x07 },
{ SSM4567_REG_SAI_PLACEMENT_5, 0x07 },
{ SSM4567_REG_SAI_PLACEMENT_6, 0x07 },
{ SSM4567_REG_BATTERY_V_OUT, 0x00 },
{ SSM4567_REG_LIMITER_CTRL_1, 0xa4 },
{ SSM4567_REG_LIMITER_CTRL_2, 0x73 },
{ SSM4567_REG_LIMITER_CTRL_3, 0x00 },
{ SSM4567_REG_STATUS_1, 0x00 },
{ SSM4567_REG_STATUS_2, 0x00 },
{ SSM4567_REG_FAULT_CTRL, 0x30 },
{ SSM4567_REG_PDM_CTRL, 0x40 },
{ SSM4567_REG_MCLK_RATIO, 0x11 },
{ SSM4567_REG_BOOST_CTRL_1, 0x03 },
{ SSM4567_REG_BOOST_CTRL_2, 0x00 },
{ SSM4567_REG_SOFT_RESET, 0x00 },
};
static bool ssm4567_readable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SSM4567_REG_POWER_CTRL ... SSM4567_REG_BOOST_CTRL_2:
return true;
default:
return false;
}
}
static bool ssm4567_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SSM4567_REG_POWER_CTRL ... SSM4567_REG_SAI_PLACEMENT_6:
case SSM4567_REG_LIMITER_CTRL_1 ... SSM4567_REG_LIMITER_CTRL_3:
case SSM4567_REG_FAULT_CTRL ... SSM4567_REG_BOOST_CTRL_2:
/* The datasheet states that soft reset register is read-only,
* but logically it is write-only. */
case SSM4567_REG_SOFT_RESET:
return true;
default:
return false;
}
}
static bool ssm4567_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SSM4567_REG_BATTERY_V_OUT:
case SSM4567_REG_STATUS_1 ... SSM4567_REG_STATUS_2:
case SSM4567_REG_SOFT_RESET:
return true;
default:
return false;
}
}
static const DECLARE_TLV_DB_MINMAX_MUTE(ssm4567_vol_tlv, -7125, 2400);
static const struct snd_kcontrol_new ssm4567_snd_controls[] = {
SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0,
0xff, 1, ssm4567_vol_tlv),
SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0),
SOC_SINGLE("DAC High Pass Filter Switch", SSM4567_REG_DAC_CTRL,
5, 1, 0),
};
static const struct snd_kcontrol_new ssm4567_amplifier_boost_control =
SOC_DAPM_SINGLE("Switch", SSM4567_REG_POWER_CTRL, 1, 1, 1);
static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1),
SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1,
&ssm4567_amplifier_boost_control),
SND_SOC_DAPM_OUTPUT("OUT"),
};
static const struct snd_soc_dapm_route ssm4567_routes[] = {
{ "OUT", NULL, "Amplifier Boost" },
{ "Amplifier Boost", "Switch", "DAC" },
{ "OUT", NULL, "DAC" },
};
static int ssm4567_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 ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
unsigned int rate = params_rate(params);
unsigned int dacfs;
if (rate >= 8000 && rate <= 12000)
dacfs = SSM4567_DAC_FS_8000_12000;
else if (rate >= 16000 && rate <= 24000)
dacfs = SSM4567_DAC_FS_16000_24000;
else if (rate >= 32000 && rate <= 48000)
dacfs = SSM4567_DAC_FS_32000_48000;
else if (rate >= 64000 && rate <= 96000)
dacfs = SSM4567_DAC_FS_64000_96000;
else if (rate >= 128000 && rate <= 192000)
dacfs = SSM4567_DAC_FS_128000_192000;
else
return -EINVAL;
return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
SSM4567_DAC_FS_MASK, dacfs);
}
static int ssm4567_mute(struct snd_soc_dai *dai, int mute)
{
struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(dai->codec);
unsigned int val;
val = mute ? SSM4567_DAC_MUTE : 0;
return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
SSM4567_DAC_MUTE, val);
}
static int ssm4567_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int width)
{
struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
unsigned int blcks;
int slot;
int ret;
if (tx_mask == 0)
return -EINVAL;
if (rx_mask && rx_mask != tx_mask)
return -EINVAL;
slot = __ffs(tx_mask);
if (tx_mask != BIT(slot))
return -EINVAL;
switch (width) {
case 32:
blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_32;
break;
case 48:
blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_48;
break;
case 64:
blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_64;
break;
default:
return -EINVAL;
}
ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_2,
SSM4567_SAI_CTRL_2_AUTO_SLOT | SSM4567_SAI_CTRL_2_TDM_SLOT_MASK,
SSM4567_SAI_CTRL_2_TDM_SLOT(slot));
if (ret)
return ret;
return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK, blcks);
}
static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
unsigned int ctrl1 = 0;
bool invert_fclk;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt
|