473 lines
12 KiB
C
473 lines
12 KiB
C
/*
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* SSM4567 amplifier audio driver
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*
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* Copyright 2014 Google Chromium project.
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* Author: Anatol Pomozov <anatol@chromium.org>
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*
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* Based on code copyright/by:
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* Copyright 2013 Analog Devices Inc.
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#define SSM4567_REG_POWER_CTRL 0x00
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#define SSM4567_REG_AMP_SNS_CTRL 0x01
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#define SSM4567_REG_DAC_CTRL 0x02
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#define SSM4567_REG_DAC_VOLUME 0x03
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#define SSM4567_REG_SAI_CTRL_1 0x04
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#define SSM4567_REG_SAI_CTRL_2 0x05
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#define SSM4567_REG_SAI_PLACEMENT_1 0x06
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#define SSM4567_REG_SAI_PLACEMENT_2 0x07
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#define SSM4567_REG_SAI_PLACEMENT_3 0x08
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#define SSM4567_REG_SAI_PLACEMENT_4 0x09
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#define SSM4567_REG_SAI_PLACEMENT_5 0x0a
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#define SSM4567_REG_SAI_PLACEMENT_6 0x0b
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#define SSM4567_REG_BATTERY_V_OUT 0x0c
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#define SSM4567_REG_LIMITER_CTRL_1 0x0d
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#define SSM4567_REG_LIMITER_CTRL_2 0x0e
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#define SSM4567_REG_LIMITER_CTRL_3 0x0f
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#define SSM4567_REG_STATUS_1 0x10
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#define SSM4567_REG_STATUS_2 0x11
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#define SSM4567_REG_FAULT_CTRL 0x12
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#define SSM4567_REG_PDM_CTRL 0x13
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#define SSM4567_REG_MCLK_RATIO 0x14
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#define SSM4567_REG_BOOST_CTRL_1 0x15
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#define SSM4567_REG_BOOST_CTRL_2 0x16
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#define SSM4567_REG_SOFT_RESET 0xff
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/* POWER_CTRL */
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#define SSM4567_POWER_APWDN_EN BIT(7)
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#define SSM4567_POWER_BSNS_PWDN BIT(6)
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#define SSM4567_POWER_VSNS_PWDN BIT(5)
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#define SSM4567_POWER_ISNS_PWDN BIT(4)
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#define SSM4567_POWER_BOOST_PWDN BIT(3)
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#define SSM4567_POWER_AMP_PWDN BIT(2)
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#define SSM4567_POWER_VBAT_ONLY BIT(1)
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#define SSM4567_POWER_SPWDN BIT(0)
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/* DAC_CTRL */
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#define SSM4567_DAC_HV BIT(7)
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#define SSM4567_DAC_MUTE BIT(6)
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#define SSM4567_DAC_HPF BIT(5)
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#define SSM4567_DAC_LPM BIT(4)
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#define SSM4567_DAC_FS_MASK 0x7
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#define SSM4567_DAC_FS_8000_12000 0x0
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#define SSM4567_DAC_FS_16000_24000 0x1
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#define SSM4567_DAC_FS_32000_48000 0x2
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#define SSM4567_DAC_FS_64000_96000 0x3
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#define SSM4567_DAC_FS_128000_192000 0x4
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/* SAI_CTRL_1 */
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#define SSM4567_SAI_CTRL_1_BCLK BIT(6)
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#define SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK (0x3 << 4)
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#define SSM4567_SAI_CTRL_1_TDM_BLCKS_32 (0x0 << 4)
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#define SSM4567_SAI_CTRL_1_TDM_BLCKS_48 (0x1 << 4)
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#define SSM4567_SAI_CTRL_1_TDM_BLCKS_64 (0x2 << 4)
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#define SSM4567_SAI_CTRL_1_FSYNC BIT(3)
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#define SSM4567_SAI_CTRL_1_LJ BIT(2)
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#define SSM4567_SAI_CTRL_1_TDM BIT(1)
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#define SSM4567_SAI_CTRL_1_PDM BIT(0)
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/* SAI_CTRL_2 */
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#define SSM4567_SAI_CTRL_2_AUTO_SLOT BIT(3)
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#define SSM4567_SAI_CTRL_2_TDM_SLOT_MASK 0x7
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#define SSM4567_SAI_CTRL_2_TDM_SLOT(x) (x)
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struct ssm4567 {
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struct regmap *regmap;
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};
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static const struct reg_default ssm4567_reg_defaults[] = {
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{ SSM4567_REG_POWER_CTRL, 0x81 },
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{ SSM4567_REG_AMP_SNS_CTRL, 0x09 },
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{ SSM4567_REG_DAC_CTRL, 0x32 },
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{ SSM4567_REG_DAC_VOLUME, 0x40 },
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{ SSM4567_REG_SAI_CTRL_1, 0x00 },
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{ SSM4567_REG_SAI_CTRL_2, 0x08 },
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{ SSM4567_REG_SAI_PLACEMENT_1, 0x01 },
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{ SSM4567_REG_SAI_PLACEMENT_2, 0x20 },
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{ SSM4567_REG_SAI_PLACEMENT_3, 0x32 },
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{ SSM4567_REG_SAI_PLACEMENT_4, 0x07 },
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{ SSM4567_REG_SAI_PLACEMENT_5, 0x07 },
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{ SSM4567_REG_SAI_PLACEMENT_6, 0x07 },
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{ SSM4567_REG_BATTERY_V_OUT, 0x00 },
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{ SSM4567_REG_LIMITER_CTRL_1, 0xa4 },
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{ SSM4567_REG_LIMITER_CTRL_2, 0x73 },
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{ SSM4567_REG_LIMITER_CTRL_3, 0x00 },
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{ SSM4567_REG_STATUS_1, 0x00 },
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{ SSM4567_REG_STATUS_2, 0x00 },
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{ SSM4567_REG_FAULT_CTRL, 0x30 },
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{ SSM4567_REG_PDM_CTRL, 0x40 },
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{ SSM4567_REG_MCLK_RATIO, 0x11 },
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{ SSM4567_REG_BOOST_CTRL_1, 0x03 },
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{ SSM4567_REG_BOOST_CTRL_2, 0x00 },
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{ SSM4567_REG_SOFT_RESET, 0x00 },
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};
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static bool ssm4567_readable_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SSM4567_REG_POWER_CTRL ... SSM4567_REG_BOOST_CTRL_2:
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return true;
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default:
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return false;
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}
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}
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static bool ssm4567_writeable_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SSM4567_REG_POWER_CTRL ... SSM4567_REG_SAI_PLACEMENT_6:
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case SSM4567_REG_LIMITER_CTRL_1 ... SSM4567_REG_LIMITER_CTRL_3:
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case SSM4567_REG_FAULT_CTRL ... SSM4567_REG_BOOST_CTRL_2:
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/* The datasheet states that soft reset register is read-only,
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* but logically it is write-only. */
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case SSM4567_REG_SOFT_RESET:
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return true;
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default:
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return false;
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}
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}
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static bool ssm4567_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SSM4567_REG_BATTERY_V_OUT:
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case SSM4567_REG_STATUS_1 ... SSM4567_REG_STATUS_2:
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case SSM4567_REG_SOFT_RESET:
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return true;
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default:
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return false;
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}
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}
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static const DECLARE_TLV_DB_MINMAX_MUTE(ssm4567_vol_tlv, -7125, 2400);
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static const struct snd_kcontrol_new ssm4567_snd_controls[] = {
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SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0,
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0xff, 1, ssm4567_vol_tlv),
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SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0),
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SOC_SINGLE("DAC High Pass Filter Switch", SSM4567_REG_DAC_CTRL,
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5, 1, 0),
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};
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static const struct snd_kcontrol_new ssm4567_amplifier_boost_control =
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SOC_DAPM_SINGLE("Switch", SSM4567_REG_POWER_CTRL, 1, 1, 1);
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static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1),
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SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1,
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&ssm4567_amplifier_boost_control),
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SND_SOC_DAPM_OUTPUT("OUT"),
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};
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static const struct snd_soc_dapm_route ssm4567_routes[] = {
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{ "OUT", NULL, "Amplifier Boost" },
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{ "Amplifier Boost", "Switch", "DAC" },
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{ "OUT", NULL, "DAC" },
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};
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static int ssm4567_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
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unsigned int rate = params_rate(params);
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unsigned int dacfs;
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if (rate >= 8000 && rate <= 12000)
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dacfs = SSM4567_DAC_FS_8000_12000;
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else if (rate >= 16000 && rate <= 24000)
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dacfs = SSM4567_DAC_FS_16000_24000;
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else if (rate >= 32000 && rate <= 48000)
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dacfs = SSM4567_DAC_FS_32000_48000;
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else if (rate >= 64000 && rate <= 96000)
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dacfs = SSM4567_DAC_FS_64000_96000;
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else if (rate >= 128000 && rate <= 192000)
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dacfs = SSM4567_DAC_FS_128000_192000;
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else
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return -EINVAL;
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return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
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SSM4567_DAC_FS_MASK, dacfs);
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}
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static int ssm4567_mute(struct snd_soc_dai *dai, int mute)
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{
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struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(dai->codec);
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unsigned int val;
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val = mute ? SSM4567_DAC_MUTE : 0;
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return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
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SSM4567_DAC_MUTE, val);
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}
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static int ssm4567_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
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unsigned int rx_mask, int slots, int width)
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{
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struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
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unsigned int blcks;
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int slot;
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int ret;
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if (tx_mask == 0)
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return -EINVAL;
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if (rx_mask && rx_mask != tx_mask)
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return -EINVAL;
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slot = __ffs(tx_mask);
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if (tx_mask != BIT(slot))
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return -EINVAL;
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switch (width) {
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case 32:
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blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_32;
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break;
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case 48:
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blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_48;
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break;
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case 64:
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blcks = SSM4567_SAI_CTRL_1_TDM_BLCKS_64;
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break;
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default:
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return -EINVAL;
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}
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ret = regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_2,
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SSM4567_SAI_CTRL_2_AUTO_SLOT | SSM4567_SAI_CTRL_2_TDM_SLOT_MASK,
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SSM4567_SAI_CTRL_2_TDM_SLOT(slot));
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if (ret)
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return ret;
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return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
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SSM4567_SAI_CTRL_1_TDM_BLCKS_MASK, blcks);
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}
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static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct ssm4567 *ssm4567 = snd_soc_dai_get_drvdata(dai);
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unsigned int ctrl1 = 0;
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bool invert_fclk;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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invert_fclk = false;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;
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invert_fclk = false;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;
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invert_fclk = true;
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break;
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case SND_SOC_DAIFMT_IB_IF:
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ctrl1 |= SSM4567_SAI_CTRL_1_BCLK;
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invert_fclk = true;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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ctrl1 |= SSM4567_SAI_CTRL_1_LJ;
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invert_fclk = !invert_fclk;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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ctrl1 |= SSM4567_SAI_CTRL_1_TDM;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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ctrl1 |= SSM4567_SAI_CTRL_1_TDM | SSM4567_SAI_CTRL_1_LJ;
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break;
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case SND_SOC_DAIFMT_PDM:
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ctrl1 |= SSM4567_SAI_CTRL_1_PDM;
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break;
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default:
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return -EINVAL;
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}
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if (invert_fclk)
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ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;
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return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
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SSM4567_SAI_CTRL_1_BCLK |
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SSM4567_SAI_CTRL_1_FSYNC |
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SSM4567_SAI_CTRL_1_LJ |
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SSM4567_SAI_CTRL_1_TDM |
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SSM4567_SAI_CTRL_1_PDM,
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ctrl1);
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}
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static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable)
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{
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int ret = 0;
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if (!enable) {
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ret = regmap_update_bits(ssm4567->regmap,
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SSM4567_REG_POWER_CTRL,
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SSM4567_POWER_SPWDN, SSM4567_POWER_SPWDN);
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regcache_mark_dirty(ssm4567->regmap);
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}
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regcache_cache_only(ssm4567->regmap, !enable);
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if (enable) {
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ret = regmap_update_bits(ssm4567->regmap,
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SSM4567_REG_POWER_CTRL,
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SSM4567_POWER_SPWDN, 0x00);
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regcache_sync(ssm4567->regmap);
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}
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return ret;
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}
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static int ssm4567_set_bias_level(struct snd_soc_codec *codec,
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enum snd_soc_bias_level level)
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{
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struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
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int ret = 0;
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switch (level) {
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case SND_SOC_BIAS_ON:
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break;
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
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ret = ssm4567_set_power(ssm4567, true);
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break;
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case SND_SOC_BIAS_OFF:
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ret = ssm4567_set_power(ssm4567, false);
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break;
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}
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return ret;
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}
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static const struct snd_soc_dai_ops ssm4567_dai_ops = {
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.hw_params = ssm4567_hw_params,
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.digital_mute = ssm4567_mute,
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.set_fmt = ssm4567_set_dai_fmt,
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.set_tdm_slot = ssm4567_set_tdm_slot,
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};
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static struct snd_soc_dai_driver ssm4567_dai = {
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.name = "ssm4567-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 1,
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.rates = SNDRV_PCM_RATE_8000_192000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32,
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},
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.ops = &ssm4567_dai_ops,
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};
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static struct snd_soc_codec_driver ssm4567_codec_driver = {
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.set_bias_level = ssm4567_set_bias_level,
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.idle_bias_off = true,
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.controls = ssm4567_snd_controls,
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.num_controls = ARRAY_SIZE(ssm4567_snd_controls),
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.dapm_widgets = ssm4567_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(ssm4567_dapm_widgets),
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.dapm_routes = ssm4567_routes,
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.num_dapm_routes = ARRAY_SIZE(ssm4567_routes),
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};
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static const struct regmap_config ssm4567_regmap_config = {
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.val_bits = 8,
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.reg_bits = 8,
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.max_register = SSM4567_REG_SOFT_RESET,
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.readable_reg = ssm4567_readable_reg,
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.writeable_reg = ssm4567_writeable_reg,
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.volatile_reg = ssm4567_volatile_reg,
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.cache_type = REGCACHE_RBTREE,
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.reg_defaults = ssm4567_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(ssm4567_reg_defaults),
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};
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static int ssm4567_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct ssm4567 *ssm4567;
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int ret;
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ssm4567 = devm_kzalloc(&i2c->dev, sizeof(*ssm4567), GFP_KERNEL);
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if (ssm4567 == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, ssm4567);
|
|
|
|
ssm4567->regmap = devm_regmap_init_i2c(i2c, &ssm4567_regmap_config);
|
|
if (IS_ERR(ssm4567->regmap))
|
|
return PTR_ERR(ssm4567->regmap);
|
|
|
|
ret = regmap_write(ssm4567->regmap, SSM4567_REG_SOFT_RESET, 0x00);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ssm4567_set_power(ssm4567, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return snd_soc_register_codec(&i2c->dev, &ssm4567_codec_driver,
|
|
&ssm4567_dai, 1);
|
|
}
|
|
|
|
static int ssm4567_i2c_remove(struct i2c_client *client)
|
|
{
|
|
snd_soc_unregister_codec(&client->dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id ssm4567_i2c_ids[] = {
|
|
{ "ssm4567", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ssm4567_i2c_ids);
|
|
|
|
static struct i2c_driver ssm4567_driver = {
|
|
.driver = {
|
|
.name = "ssm4567",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = ssm4567_i2c_probe,
|
|
.remove = ssm4567_i2c_remove,
|
|
.id_table = ssm4567_i2c_ids,
|
|
};
|
|
module_i2c_driver(ssm4567_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC SSM4567 driver");
|
|
MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
|
|
MODULE_LICENSE("GPL");
|