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![Kuninori Morimoto](/assets/img/avatar_default.png)
codec driver and component driver has duplicated callback functions, and codec side functions are just copied to component side when register timing. This was quick-hack, but no longer needed. This patch moves these functions from codec driver to component driver. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@kernel.org>
622 lines
17 KiB
C
622 lines
17 KiB
C
/*
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* tas5720.c - ALSA SoC Texas Instruments TAS5720 Mono Audio Amplifier
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*
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* Copyright (C)2015-2016 Texas Instruments Incorporated - http://www.ti.com
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*
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* Author: Andreas Dannenberg <dannenberg@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/regulator/consumer.h>
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#include <linux/delay.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/soc-dapm.h>
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#include <sound/tlv.h>
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#include "tas5720.h"
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/* Define how often to check (and clear) the fault status register (in ms) */
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#define TAS5720_FAULT_CHECK_INTERVAL 200
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static const char * const tas5720_supply_names[] = {
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"dvdd", /* Digital power supply. Connect to 3.3-V supply. */
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"pvdd", /* Class-D amp and analog power supply (connected). */
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};
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#define TAS5720_NUM_SUPPLIES ARRAY_SIZE(tas5720_supply_names)
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struct tas5720_data {
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struct snd_soc_codec *codec;
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struct regmap *regmap;
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struct i2c_client *tas5720_client;
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struct regulator_bulk_data supplies[TAS5720_NUM_SUPPLIES];
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struct delayed_work fault_check_work;
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unsigned int last_fault;
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};
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static int tas5720_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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unsigned int rate = params_rate(params);
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bool ssz_ds;
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int ret;
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switch (rate) {
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case 44100:
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case 48000:
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ssz_ds = false;
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break;
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case 88200:
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case 96000:
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ssz_ds = true;
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break;
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default:
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dev_err(codec->dev, "unsupported sample rate: %u\n", rate);
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return -EINVAL;
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}
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
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TAS5720_SSZ_DS, ssz_ds);
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if (ret < 0) {
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dev_err(codec->dev, "error setting sample rate: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tas5720_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_codec *codec = dai->codec;
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u8 serial_format;
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int ret;
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if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
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dev_vdbg(codec->dev, "DAI Format master is not found\n");
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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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SND_SOC_DAIFMT_INV_MASK)) {
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case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
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/* 1st data bit occur one BCLK cycle after the frame sync */
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serial_format = TAS5720_SAIF_I2S;
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break;
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case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF):
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/*
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* Note that although the TAS5720 does not have a dedicated DSP
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* mode it doesn't care about the LRCLK duty cycle during TDM
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* operation. Therefore we can use the device's I2S mode with
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* its delaying of the 1st data bit to receive DSP_A formatted
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* data. See device datasheet for additional details.
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*/
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serial_format = TAS5720_SAIF_I2S;
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break;
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case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF):
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/*
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* Similar to DSP_A, we can use the fact that the TAS5720 does
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* not care about the LRCLK duty cycle during TDM to receive
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* DSP_B formatted data in LEFTJ mode (no delaying of the 1st
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* data bit).
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*/
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serial_format = TAS5720_SAIF_LEFTJ;
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break;
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case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
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/* No delay after the frame sync */
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serial_format = TAS5720_SAIF_LEFTJ;
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break;
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default:
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dev_vdbg(codec->dev, "DAI Format is not found\n");
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return -EINVAL;
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}
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
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TAS5720_SAIF_FORMAT_MASK,
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serial_format);
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if (ret < 0) {
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dev_err(codec->dev, "error setting SAIF format: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tas5720_set_dai_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask,
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int slots, int slot_width)
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{
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struct snd_soc_codec *codec = dai->codec;
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unsigned int first_slot;
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int ret;
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if (!tx_mask) {
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dev_err(codec->dev, "tx masks must not be 0\n");
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return -EINVAL;
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}
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/*
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* Determine the first slot that is being requested. We will only
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* use the first slot that is found since the TAS5720 is a mono
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* amplifier.
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*/
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first_slot = __ffs(tx_mask);
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if (first_slot > 7) {
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dev_err(codec->dev, "slot selection out of bounds (%u)\n",
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first_slot);
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return -EINVAL;
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}
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/* Enable manual TDM slot selection (instead of I2C ID based) */
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL1_REG,
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TAS5720_TDM_CFG_SRC, TAS5720_TDM_CFG_SRC);
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if (ret < 0)
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goto error_snd_soc_update_bits;
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/* Configure the TDM slot to process audio from */
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
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TAS5720_TDM_SLOT_SEL_MASK, first_slot);
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if (ret < 0)
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goto error_snd_soc_update_bits;
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return 0;
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error_snd_soc_update_bits:
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dev_err(codec->dev, "error configuring TDM mode: %d\n", ret);
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return ret;
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}
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static int tas5720_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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int ret;
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
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TAS5720_MUTE, mute ? TAS5720_MUTE : 0);
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if (ret < 0) {
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dev_err(codec->dev, "error (un-)muting device: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static void tas5720_fault_check_work(struct work_struct *work)
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{
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struct tas5720_data *tas5720 = container_of(work, struct tas5720_data,
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fault_check_work.work);
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struct device *dev = tas5720->codec->dev;
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unsigned int curr_fault;
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int ret;
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ret = regmap_read(tas5720->regmap, TAS5720_FAULT_REG, &curr_fault);
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if (ret < 0) {
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dev_err(dev, "failed to read FAULT register: %d\n", ret);
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goto out;
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}
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/* Check/handle all errors except SAIF clock errors */
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curr_fault &= TAS5720_OCE | TAS5720_DCE | TAS5720_OTE;
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/*
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* Only flag errors once for a given occurrence. This is needed as
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* the TAS5720 will take time clearing the fault condition internally
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* during which we don't want to bombard the system with the same
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* error message over and over.
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*/
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if ((curr_fault & TAS5720_OCE) && !(tas5720->last_fault & TAS5720_OCE))
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dev_crit(dev, "experienced an over current hardware fault\n");
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if ((curr_fault & TAS5720_DCE) && !(tas5720->last_fault & TAS5720_DCE))
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dev_crit(dev, "experienced a DC detection fault\n");
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if ((curr_fault & TAS5720_OTE) && !(tas5720->last_fault & TAS5720_OTE))
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dev_crit(dev, "experienced an over temperature fault\n");
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/* Store current fault value so we can detect any changes next time */
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tas5720->last_fault = curr_fault;
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if (!curr_fault)
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goto out;
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/*
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* Periodically toggle SDZ (shutdown bit) H->L->H to clear any latching
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* faults as long as a fault condition persists. Always going through
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* the full sequence no matter the first return value to minimizes
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* chances for the device to end up in shutdown mode.
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*/
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ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
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TAS5720_SDZ, 0);
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if (ret < 0)
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dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
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ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
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TAS5720_SDZ, TAS5720_SDZ);
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if (ret < 0)
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dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
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out:
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/* Schedule the next fault check at the specified interval */
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schedule_delayed_work(&tas5720->fault_check_work,
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msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
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}
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static int tas5720_codec_probe(struct snd_soc_codec *codec)
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{
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struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
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unsigned int device_id;
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int ret;
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tas5720->codec = codec;
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ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
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tas5720->supplies);
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if (ret != 0) {
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dev_err(codec->dev, "failed to enable supplies: %d\n", ret);
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return ret;
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}
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ret = regmap_read(tas5720->regmap, TAS5720_DEVICE_ID_REG, &device_id);
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if (ret < 0) {
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dev_err(codec->dev, "failed to read device ID register: %d\n",
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ret);
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goto probe_fail;
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}
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if (device_id != TAS5720_DEVICE_ID) {
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dev_err(codec->dev, "wrong device ID. expected: %u read: %u\n",
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TAS5720_DEVICE_ID, device_id);
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ret = -ENODEV;
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goto probe_fail;
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}
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/* Set device to mute */
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ret = snd_soc_update_bits(codec, TAS5720_DIGITAL_CTRL2_REG,
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TAS5720_MUTE, TAS5720_MUTE);
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if (ret < 0)
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goto error_snd_soc_update_bits;
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/*
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* Enter shutdown mode - our default when not playing audio - to
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* minimize current consumption. On the TAS5720 there is no real down
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* side doing so as all device registers are preserved and the wakeup
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* of the codec is rather quick which we do using a dapm widget.
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*/
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ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
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TAS5720_SDZ, 0);
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if (ret < 0)
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goto error_snd_soc_update_bits;
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INIT_DELAYED_WORK(&tas5720->fault_check_work, tas5720_fault_check_work);
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return 0;
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error_snd_soc_update_bits:
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dev_err(codec->dev, "error configuring device registers: %d\n", ret);
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probe_fail:
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regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
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tas5720->supplies);
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return ret;
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}
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static int tas5720_codec_remove(struct snd_soc_codec *codec)
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{
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struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
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int ret;
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cancel_delayed_work_sync(&tas5720->fault_check_work);
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ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
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tas5720->supplies);
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if (ret < 0)
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dev_err(codec->dev, "failed to disable supplies: %d\n", ret);
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return ret;
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};
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static int tas5720_dac_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
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struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
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int ret;
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if (event & SND_SOC_DAPM_POST_PMU) {
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/* Take TAS5720 out of shutdown mode */
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ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
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TAS5720_SDZ, TAS5720_SDZ);
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if (ret < 0) {
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dev_err(codec->dev, "error waking codec: %d\n", ret);
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return ret;
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}
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/*
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* Observe codec shutdown-to-active time. The datasheet only
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* lists a nominal value however just use-it as-is without
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* additional padding to minimize the delay introduced in
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* starting to play audio (actually there is other setup done
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* by the ASoC framework that will provide additional delays,
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* so we should always be safe).
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*/
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msleep(25);
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/* Turn on TAS5720 periodic fault checking/handling */
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tas5720->last_fault = 0;
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schedule_delayed_work(&tas5720->fault_check_work,
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msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
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} else if (event & SND_SOC_DAPM_PRE_PMD) {
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/* Disable TAS5720 periodic fault checking/handling */
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cancel_delayed_work_sync(&tas5720->fault_check_work);
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/* Place TAS5720 in shutdown mode to minimize current draw */
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ret = snd_soc_update_bits(codec, TAS5720_POWER_CTRL_REG,
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TAS5720_SDZ, 0);
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if (ret < 0) {
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dev_err(codec->dev, "error shutting down codec: %d\n",
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ret);
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return ret;
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}
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}
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return 0;
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}
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#ifdef CONFIG_PM
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static int tas5720_suspend(struct snd_soc_codec *codec)
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{
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struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
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int ret;
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regcache_cache_only(tas5720->regmap, true);
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regcache_mark_dirty(tas5720->regmap);
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ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
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tas5720->supplies);
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if (ret < 0)
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dev_err(codec->dev, "failed to disable supplies: %d\n", ret);
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return ret;
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}
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static int tas5720_resume(struct snd_soc_codec *codec)
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{
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struct tas5720_data *tas5720 = snd_soc_codec_get_drvdata(codec);
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
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tas5720->supplies);
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if (ret < 0) {
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dev_err(codec->dev, "failed to enable supplies: %d\n", ret);
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return ret;
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}
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regcache_cache_only(tas5720->regmap, false);
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ret = regcache_sync(tas5720->regmap);
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if (ret < 0) {
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dev_err(codec->dev, "failed to sync regcache: %d\n", ret);
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return ret;
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}
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return 0;
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}
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#else
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#define tas5720_suspend NULL
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#define tas5720_resume NULL
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#endif
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static bool tas5720_is_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case TAS5720_DEVICE_ID_REG:
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case TAS5720_FAULT_REG:
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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 struct regmap_config tas5720_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = TAS5720_MAX_REG,
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.cache_type = REGCACHE_RBTREE,
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.volatile_reg = tas5720_is_volatile_reg,
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};
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/*
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* DAC analog gain. There are four discrete values to select from, ranging
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* from 19.2 dB to 26.3dB.
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*/
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static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
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0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
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0x1, 0x1, TLV_DB_SCALE_ITEM(2070, 0, 0),
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0x2, 0x2, TLV_DB_SCALE_ITEM(2350, 0, 0),
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0x3, 0x3, TLV_DB_SCALE_ITEM(2630, 0, 0),
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);
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/*
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* DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that
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* setting the gain below -100 dB (register value <0x7) is effectively a MUTE
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* as per device datasheet.
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*/
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static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0);
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static const struct snd_kcontrol_new tas5720_snd_controls[] = {
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SOC_SINGLE_TLV("Speaker Driver Playback Volume",
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TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, dac_tlv),
|
|
SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
|
|
TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_widget tas5720_dapm_widgets[] = {
|
|
SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
|
|
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5720_dac_event,
|
|
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
|
|
SND_SOC_DAPM_OUTPUT("OUT")
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route tas5720_audio_map[] = {
|
|
{ "DAC", NULL, "DAC IN" },
|
|
{ "OUT", NULL, "DAC" },
|
|
};
|
|
|
|
static struct snd_soc_codec_driver soc_codec_dev_tas5720 = {
|
|
.probe = tas5720_codec_probe,
|
|
.remove = tas5720_codec_remove,
|
|
.suspend = tas5720_suspend,
|
|
.resume = tas5720_resume,
|
|
|
|
.component_driver = {
|
|
.controls = tas5720_snd_controls,
|
|
.num_controls = ARRAY_SIZE(tas5720_snd_controls),
|
|
.dapm_widgets = tas5720_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
|
|
.dapm_routes = tas5720_audio_map,
|
|
.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
|
|
},
|
|
};
|
|
|
|
/* PCM rates supported by the TAS5720 driver */
|
|
#define TAS5720_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
|
|
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
|
|
|
|
/* Formats supported by TAS5720 driver */
|
|
#define TAS5720_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\
|
|
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE)
|
|
|
|
static struct snd_soc_dai_ops tas5720_speaker_dai_ops = {
|
|
.hw_params = tas5720_hw_params,
|
|
.set_fmt = tas5720_set_dai_fmt,
|
|
.set_tdm_slot = tas5720_set_dai_tdm_slot,
|
|
.digital_mute = tas5720_mute,
|
|
};
|
|
|
|
/*
|
|
* TAS5720 DAI structure
|
|
*
|
|
* Note that were are advertising .playback.channels_max = 2 despite this being
|
|
* a mono amplifier. The reason for that is that some serial ports such as TI's
|
|
* McASP module have a minimum number of channels (2) that they can output.
|
|
* Advertising more channels than we have will allow us to interface with such
|
|
* a serial port without really any negative side effects as the TAS5720 will
|
|
* simply ignore any extra channel(s) asides from the one channel that is
|
|
* configured to be played back.
|
|
*/
|
|
static struct snd_soc_dai_driver tas5720_dai[] = {
|
|
{
|
|
.name = "tas5720-amplifier",
|
|
.playback = {
|
|
.stream_name = "Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = TAS5720_RATES,
|
|
.formats = TAS5720_FORMATS,
|
|
},
|
|
.ops = &tas5720_speaker_dai_ops,
|
|
},
|
|
};
|
|
|
|
static int tas5720_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct tas5720_data *data;
|
|
int ret;
|
|
int i;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->tas5720_client = client;
|
|
data->regmap = devm_regmap_init_i2c(client, &tas5720_regmap_config);
|
|
if (IS_ERR(data->regmap)) {
|
|
ret = PTR_ERR(data->regmap);
|
|
dev_err(dev, "failed to allocate register map: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
|
|
data->supplies[i].supply = tas5720_supply_names[i];
|
|
|
|
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
|
|
data->supplies);
|
|
if (ret != 0) {
|
|
dev_err(dev, "failed to request supplies: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_set_drvdata(dev, data);
|
|
|
|
ret = snd_soc_register_codec(&client->dev,
|
|
&soc_codec_dev_tas5720,
|
|
tas5720_dai, ARRAY_SIZE(tas5720_dai));
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to register codec: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tas5720_remove(struct i2c_client *client)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
|
|
snd_soc_unregister_codec(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tas5720_id[] = {
|
|
{ "tas5720", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tas5720_id);
|
|
|
|
#if IS_ENABLED(CONFIG_OF)
|
|
static const struct of_device_id tas5720_of_match[] = {
|
|
{ .compatible = "ti,tas5720", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tas5720_of_match);
|
|
#endif
|
|
|
|
static struct i2c_driver tas5720_i2c_driver = {
|
|
.driver = {
|
|
.name = "tas5720",
|
|
.of_match_table = of_match_ptr(tas5720_of_match),
|
|
},
|
|
.probe = tas5720_probe,
|
|
.remove = tas5720_remove,
|
|
.id_table = tas5720_id,
|
|
};
|
|
|
|
module_i2c_driver(tas5720_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
|
|
MODULE_DESCRIPTION("TAS5720 Audio amplifier driver");
|
|
MODULE_LICENSE("GPL");
|