408 lines
11 KiB
C
408 lines
11 KiB
C
/* i.MX AK4458 audio support
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*
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* Copyright 2017 NXP
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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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/slab.h>
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#include <linux/gpio/consumer.h>
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#include <linux/of_device.h>
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#include <linux/i2c.h>
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#include <linux/of_gpio.h>
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#include <linux/clk.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/pcm.h>
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#include <sound/soc-dapm.h>
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#include "fsl_sai.h"
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#include "fsl_dsd.h"
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struct imx_ak4458_data {
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struct snd_soc_card card;
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int num_codec_conf;
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struct snd_soc_codec_conf *codec_conf;
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bool tdm_mode;
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int pdn_gpio;
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unsigned int slots;
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unsigned int slot_width;
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bool one2one_ratio;
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};
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static struct snd_soc_dapm_widget imx_ak4458_dapm_widgets[] = {
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SND_SOC_DAPM_LINE("Line Out", NULL),
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};
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/**
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* Tables 3 & 4 - mapping LRCK fs and frame width
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*/
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static const struct imx_ak4458_fs_map {
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unsigned int rmin;
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unsigned int rmax;
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unsigned int wmin;
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unsigned int wmax;
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} fs_map[] = {
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/* Normal, < 32kHz */
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{ .rmin = 8000, .rmax = 24000, .wmin = 1024, .wmax = 1024, },
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/* Normal, 32kHz */
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{ .rmin = 32000, .rmax = 32000, .wmin = 256, .wmax = 1024, },
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/* Normal */
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{ .rmin = 44100, .rmax = 48000, .wmin = 256, .wmax = 768, },
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/* Double */
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{ .rmin = 88200, .rmax = 96000, .wmin = 256, .wmax = 512, },
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/* Quad */
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{ .rmin = 176400, .rmax = 192000, .wmin = 128, .wmax = 256, },
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/* Oct */
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{ .rmin = 352800, .rmax = 384000, .wmin = 32, .wmax = 128, },
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/* Hex */
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{ .rmin = 705600, .rmax = 768000, .wmin = 16, .wmax = 64, },
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};
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static const struct imx_ak4458_fs_mul {
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unsigned int min;
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unsigned int max;
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unsigned int mul;
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} fs_mul_tdm[] = {
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/*
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* Table 13 - Audio Interface Format
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* For TDM mode, MCLK should is set to
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* obtained from 2 * slots * slot_width
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*/
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{ .min = 128, .max = 128, .mul = 256 }, /* TDM128 */
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{ .min = 256, .max = 256, .mul = 512 }, /* TDM256 */
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{ .min = 512, .max = 512, .mul = 1024 }, /* TDM512 */
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};
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static const u32 ak4458_rates[] = {
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8000, 11025, 16000, 22050,
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32000, 44100, 48000, 88200,
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96000, 176400, 192000, 352800,
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384000, 705600, 768000,
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};
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static const u32 ak4458_rates_tdm[] = {
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8000, 16000, 32000,
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48000, 96000,
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};
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static const u32 ak4458_channels[] = {
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1, 2, 4, 6, 8, 10, 12, 14, 16,
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};
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static const u32 ak4458_channels_tdm[] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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};
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static unsigned long ak4458_get_mclk_rate(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct imx_ak4458_data *data = snd_soc_card_get_drvdata(rtd->card);
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unsigned int rate = params_rate(params);
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unsigned int width = data->slots * data->slot_width;
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int i, mode;
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if (data->tdm_mode) {
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/* can be 128, 256 or 512 */
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mode = data->slots * data->slot_width;
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for (i = 0; i < ARRAY_SIZE(fs_mul_tdm); i++) {
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/* min = max = slots * slots_width */
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if (mode != fs_mul_tdm[i].min)
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continue;
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return rate * fs_mul_tdm[i].mul;
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}
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} else {
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for (i = 0; i < ARRAY_SIZE(fs_map); i++) {
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if (rate >= fs_map[i].rmin && rate <= fs_map[i].rmax) {
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width = max(width, fs_map[i].wmin);
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width = min(width, fs_map[i].wmax);
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/* Adjust SAI bclk:mclk ratio */
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width *= data->one2one_ratio ? 1 : 2;
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return rate * width;
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}
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}
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}
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/* Let DAI manage clk frequency by default */
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return 0;
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}
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static int imx_aif_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_card *card = rtd->card;
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struct device *dev = card->dev;
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struct imx_ak4458_data *data = snd_soc_card_get_drvdata(card);
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unsigned int channels = params_channels(params);
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unsigned int fmt = SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
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unsigned long mclk_freq;
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bool is_dsd = fsl_is_dsd(params);
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int ret, i;
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if (is_dsd) {
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channels = 1;
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data->slots = 1;
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data->slot_width = params_width(params);
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fmt |= SND_SOC_DAIFMT_PDM;
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} else if (data->tdm_mode) {
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data->slots = 8;
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data->slot_width = 32;
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fmt |= SND_SOC_DAIFMT_DSP_B;
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} else {
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data->slots = 2;
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data->slot_width = params_physical_width(params);
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fmt |= SND_SOC_DAIFMT_I2S;
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}
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
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if (ret) {
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dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
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return ret;
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}
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ret = snd_soc_dai_set_tdm_slot(cpu_dai,
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BIT(channels) - 1, BIT(channels) - 1,
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data->slots, data->slot_width);
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if (ret) {
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dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
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return ret;
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}
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for (i = 0; i < rtd->num_codecs; i++) {
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struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
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ret = snd_soc_dai_set_fmt(codec_dai, fmt);
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if (ret) {
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dev_err(dev, "failed to set codec dai[%d] fmt: %d\n",
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i, ret);
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return ret;
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}
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ret = snd_soc_dai_set_tdm_slot(codec_dai,
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BIT(channels) - 1, BIT(channels) - 1,
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data->slots, data->slot_width);
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if (ret) {
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dev_err(dev, "failed to set codec dai[%d] tdm slot: %d\n",
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i, ret);
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return ret;
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}
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}
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/* set MCLK freq */
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mclk_freq = ak4458_get_mclk_rate(substream, params);
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if (is_dsd)
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mclk_freq = 22579200;
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ret = snd_soc_dai_set_sysclk(cpu_dai, FSL_SAI_CLK_MAST1, mclk_freq,
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SND_SOC_CLOCK_OUT);
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if (ret < 0)
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dev_err(dev, "failed to set cpui dai mclk1 rate (%lu): %d\n",
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mclk_freq, ret);
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return ret;
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}
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static int imx_aif_startup(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_card *card = rtd->card;
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struct imx_ak4458_data *data = snd_soc_card_get_drvdata(card);
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static struct snd_pcm_hw_constraint_list constraint_rates;
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static struct snd_pcm_hw_constraint_list constraint_channels;
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int ret;
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if (data->tdm_mode) {
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constraint_channels.list = ak4458_channels_tdm;
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constraint_channels.count = ARRAY_SIZE(ak4458_channels_tdm);
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constraint_rates.list = ak4458_rates_tdm;
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constraint_rates.count = ARRAY_SIZE(ak4458_rates_tdm);
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} else {
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constraint_channels.list = ak4458_channels;
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constraint_channels.count = ARRAY_SIZE(ak4458_channels);
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constraint_rates.list = ak4458_rates;
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constraint_rates.count = ARRAY_SIZE(ak4458_rates);
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}
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ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
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&constraint_channels);
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if (ret)
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return ret;
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ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
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&constraint_rates);
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if (ret)
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return ret;
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return 0;
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}
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static struct snd_soc_ops imx_aif_ops = {
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.hw_params = imx_aif_hw_params,
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.startup = imx_aif_startup,
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};
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static struct snd_soc_dai_link_component ak4458_codecs[] = {
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{
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/* Playback */
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.dai_name = "ak4458-aif",
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},
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{
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/* Capture */
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.dai_name = "ak4458-aif",
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},
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};
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static struct snd_soc_dai_link imx_ak4458_dai = {
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.name = "ak4458",
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.stream_name = "Audio",
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.codecs = ak4458_codecs,
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.num_codecs = 2,
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.ignore_pmdown_time = 1,
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.ops = &imx_aif_ops,
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.playback_only = 1,
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};
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static int imx_ak4458_probe(struct platform_device *pdev)
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{
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struct imx_ak4458_data *priv;
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struct device_node *cpu_np, *codec_np_0 = NULL, *codec_np_1 = NULL;
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struct platform_device *cpu_pdev;
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int ret;
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
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if (!cpu_np) {
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dev_err(&pdev->dev, "audio dai phandle missing or invalid\n");
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ret = -EINVAL;
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goto fail;
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}
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codec_np_0 = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
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if (!codec_np_0) {
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dev_err(&pdev->dev, "audio codec phandle missing or invalid\n");
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ret = -EINVAL;
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goto fail;
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}
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codec_np_1 = of_parse_phandle(pdev->dev.of_node, "audio-codec", 1);
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if (!codec_np_1) {
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dev_err(&pdev->dev, "audio codec phandle missing or invalid\n");
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ret = -EINVAL;
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goto fail;
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}
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cpu_pdev = of_find_device_by_node(cpu_np);
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if (!cpu_pdev) {
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dev_err(&pdev->dev, "failed to find SAI platform device\n");
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ret = -EINVAL;
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goto fail;
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}
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if (of_find_property(pdev->dev.of_node, "fsl,tdm", NULL))
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priv->tdm_mode = true;
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priv->num_codec_conf = 2;
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priv->codec_conf = devm_kzalloc(&pdev->dev,
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priv->num_codec_conf * sizeof(struct snd_soc_codec_conf),
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GFP_KERNEL);
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if (!priv->codec_conf) {
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ret = -ENOMEM;
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goto fail;
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}
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priv->codec_conf[0].name_prefix = "0";
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priv->codec_conf[0].of_node = codec_np_0;
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priv->codec_conf[1].name_prefix = "1";
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priv->codec_conf[1].of_node = codec_np_1;
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ak4458_codecs[0].of_node = codec_np_0;
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ak4458_codecs[1].of_node = codec_np_1;
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imx_ak4458_dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
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imx_ak4458_dai.platform_of_node = cpu_np;
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priv->card.num_links = 1;
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priv->card.dai_link = &imx_ak4458_dai;
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priv->card.dev = &pdev->dev;
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priv->card.owner = THIS_MODULE;
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priv->card.dapm_widgets = imx_ak4458_dapm_widgets;
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priv->card.num_dapm_widgets = ARRAY_SIZE(imx_ak4458_dapm_widgets);
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priv->card.codec_conf = priv->codec_conf;
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priv->card.num_configs = priv->num_codec_conf;
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priv->one2one_ratio = !of_device_is_compatible(pdev->dev.of_node,
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"fsl,imx-audio-ak4458-mq");
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priv->pdn_gpio = of_get_named_gpio(pdev->dev.of_node, "ak4458,pdn-gpio", 0);
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if (gpio_is_valid(priv->pdn_gpio)) {
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ret = devm_gpio_request_one(&pdev->dev, priv->pdn_gpio,
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GPIOF_OUT_INIT_LOW, "ak4458,pdn");
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if (ret) {
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dev_err(&pdev->dev, "unable to get pdn gpio\n");
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goto fail;
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}
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gpio_set_value_cansleep(priv->pdn_gpio, 0);
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usleep_range(1000, 2000);
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gpio_set_value_cansleep(priv->pdn_gpio, 1);
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usleep_range(1000, 2000);
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}
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ret = snd_soc_of_parse_card_name(&priv->card, "model");
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if (ret)
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goto fail;
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snd_soc_card_set_drvdata(&priv->card, priv);
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ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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goto fail;
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}
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ret = 0;
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fail:
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if (cpu_np)
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of_node_put(cpu_np);
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if (codec_np_0)
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of_node_put(codec_np_0);
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if (codec_np_1)
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of_node_put(codec_np_1);
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return ret;
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}
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static const struct of_device_id imx_ak4458_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-ak4458", },
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{ .compatible = "fsl,imx-audio-ak4458-mq", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, imx_ak4458_dt_ids);
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static struct platform_driver imx_ak4458_driver = {
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.driver = {
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.name = "imx-ak4458",
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.pm = &snd_soc_pm_ops,
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.of_match_table = imx_ak4458_dt_ids,
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},
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.probe = imx_ak4458_probe,
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};
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module_platform_driver(imx_ak4458_driver);
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MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
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MODULE_DESCRIPTION("Freescale i.MX AK4458 ASoC machine driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:imx-ak4458");
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