281 lines
6.6 KiB
C
281 lines
6.6 KiB
C
/*
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* sound\soc\sunxi\i2s1\sunxi_sndi2s1.c
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* (C) Copyright 2010-2016
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* Reuuimlla Technology Co., Ltd. <www.reuuimllatech.com>
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* huangxin <huangxin@Reuuimllatech.com>
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*
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* some simple description for this code
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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 as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/mutex.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/soc-dapm.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include "sunxi-i2s1.h"
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#include "sunxi-i2s1dma.h"
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static bool i2s1_pcm_select;
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static int i2s1_master;
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static int audio_format;
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static int signal_inversion;
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/*
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* i2s1_pcm_select == 0:--> pcm
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* i2s1_pcm_select == 1:--> i2s
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*/
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static int sunxi_i2s1_set_audio_mode(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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i2s1_pcm_select = ucontrol->value.integer.value[0];
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if (i2s1_pcm_select) {
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audio_format = 1;
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signal_inversion = 1;
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i2s1_master = 4;
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} else {
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audio_format = 4;
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signal_inversion = 3;
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i2s1_master = 1;
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}
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return 0;
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}
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static int sunxi_i2s1_get_audio_mode(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.integer.value[0] = i2s1_pcm_select;
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return 0;
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}
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/* I2s Or Pcm Audio Mode Select */
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static const struct snd_kcontrol_new sunxi_i2s1_controls[] = {
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SOC_SINGLE_BOOL_EXT("I2s Or Pcm Audio Mode Select format", 0,
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sunxi_i2s1_get_audio_mode, sunxi_i2s1_set_audio_mode),
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};
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static int sunxi_sndi2s1_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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int ret = 0;
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u32 freq = 22579200;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned long sample_rate = params_rate(params);
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switch (sample_rate) {
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case 8000:
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case 16000:
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case 32000:
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case 64000:
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case 128000:
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case 12000:
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case 24000:
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case 48000:
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case 96000:
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case 192000:
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freq = 24576000;
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break;
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}
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/*set system clock source freq and set the mode as i2s1 or pcm*/
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0 , freq, i2s1_pcm_select);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_A |
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SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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return ret;
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/*
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* codec clk & FRM master. AP as slave
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*/
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ret = snd_soc_dai_set_fmt(cpu_dai, (audio_format |
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(signal_inversion<<8) | (i2s1_master<<12)));
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, sample_rate);
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if (ret < 0)
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return ret;
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/*
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* audio_format == SND_SOC_DAIFMT_DSP_A
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* signal_inversion<<8 == SND_SOC_DAIFMT_IB_NF
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* i2s1_master<<12 == SND_SOC_DAIFMT_CBM_CFM
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*/
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I2S1_DBG("i2s1,audio_format:%d,SND_SOC_DAIFMT_DSP_A:%d\n", audio_format,
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SND_SOC_DAIFMT_DSP_A);
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I2S1_DBG("i2s1,signal_inversion:%d,SND_SOC_DAIFMT_IB_NF:%d\n",
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signal_inversion, SND_SOC_DAIFMT_IB_NF);
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I2S1_DBG("i2s1_master:%d,SND_SOC_DAIFMT_CBM_CFM:%d\n", i2s1_master,
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SND_SOC_DAIFMT_CBM_CFM);
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return 0;
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}
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/*
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* Card initialization
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*/
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static int sunxi_i2s1_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_codec *codec = rtd->codec;
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struct snd_soc_card *card = rtd->card;
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int ret;
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/* Add virtual switch */
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ret = snd_soc_add_codec_controls(codec, sunxi_i2s1_controls,
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ARRAY_SIZE(sunxi_i2s1_controls));
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if (ret) {
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dev_warn(card->dev,
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"Failed to register audio mode control, "
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"will continue without it.\n");
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}
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return 0;
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}
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static struct snd_soc_ops sunxi_sndi2s1_ops = {
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.hw_params = sunxi_sndi2s1_hw_params,
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};
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static struct snd_soc_dai_link sunxi_sndi2s1_dai_link = {
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.name = "I2S1",
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.stream_name = "SUNXI-I2S1",
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.cpu_dai_name = "i2s1",
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.codec_dai_name = "sndi2s1",
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.init = sunxi_i2s1_init,
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.platform_name = "sunxi-i2s1-pcm-audio.0",
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.codec_name = "sunxi-i2s1-codec.0",
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.ops = &sunxi_sndi2s1_ops,
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};
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static struct snd_soc_card snd_soc_sunxi_sndi2s1 = {
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.name = "sndi2s1",
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.owner = THIS_MODULE,
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.dai_link = &sunxi_sndi2s1_dai_link,
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.num_links = 1,
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};
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static int sunxi_sndi2s1_dev_probe(struct platform_device *pdev)
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{
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int ret = 0;
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int val;
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struct snd_soc_card *card = &snd_soc_sunxi_sndi2s1;
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struct device_node *np = pdev->dev.of_node;
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struct device_node *i2s1_np =
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of_parse_phandle(np, "sunxi,i2s1-controller", 0);
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sunxi_sndi2s1_dai_link.cpu_dai_name = NULL;
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sunxi_sndi2s1_dai_link.cpu_of_node = i2s1_np;
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ret = of_property_read_u32(i2s1_np, "i2s1_select", &val);
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if (ret < 0) {
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dev_warn(&pdev->dev, "i2s1_select missing or invalid\n");
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i2s1_pcm_select = 0;
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} else {
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i2s1_pcm_select = val;
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dev_dbg(&pdev->dev, "i2s1_select:%d\n", val);
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}
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ret = of_property_read_u32(i2s1_np, "i2s1_master", &val);
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if (ret < 0) {
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dev_warn(&pdev->dev, "i2s1_master missing or invalid\n");
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i2s1_master = 0;
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} else {
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i2s1_master = val;
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dev_dbg(&pdev->dev, "i2s1_master:%d\n", val);
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}
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ret = of_property_read_u32(i2s1_np, "audio_format", &val);
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if (ret < 0) {
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dev_warn(&pdev->dev, "audio_format missing or invalid\n");
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audio_format = 0;
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} else {
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audio_format = val;
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dev_dbg(&pdev->dev, "audio_format:%d\n", val);
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}
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ret = of_property_read_u32(i2s1_np, "signal_inversion", &val);
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if (ret < 0) {
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dev_warn(&pdev->dev, "signal_inversion missing or invalid\n");
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signal_inversion = 0;
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} else {
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signal_inversion = val;
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dev_dbg(&pdev->dev, "signal_inversion:%d\n", val);
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}
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card->dev = &pdev->dev;
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev,
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"snd_soc_register_card() failed: %d\n", ret);
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}
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return ret;
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}
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static int sunxi_sndi2s1_dev_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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snd_soc_unregister_card(card);
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return 0;
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}
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static const struct of_device_id sunxi_i2s1_of_match[] = {
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{ .compatible = "allwinner,sunxi-sndi2s1", },
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{},
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};
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/*method relating*/
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static struct platform_driver sunxi_i2s1_driver = {
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.probe = sunxi_sndi2s1_dev_probe,
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.remove = sunxi_sndi2s1_dev_remove,
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.driver = {
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.name = "sndi2s1",
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.owner = THIS_MODULE,
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.of_match_table = sunxi_i2s1_of_match,
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.pm = &snd_soc_pm_ops,
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},
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};
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static int __init sunxi_sndi2s1_init(void)
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{
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int err = 0;
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err = platform_driver_register(&sunxi_i2s1_driver);
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if (err < 0)
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return err;
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return 0;
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}
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module_init(sunxi_sndi2s1_init);
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static void __exit sunxi_sndi2s1_exit(void)
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{
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platform_driver_unregister(&sunxi_i2s1_driver);
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}
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module_exit(sunxi_sndi2s1_exit);
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MODULE_AUTHOR("huangxin");
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MODULE_DESCRIPTION("SUNXI_sndi2s1 ALSA SoC audio driver");
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MODULE_LICENSE("GPL");
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