329 lines
8.3 KiB
C
329 lines
8.3 KiB
C
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/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*
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* Based on imx-sgtl5000.c
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* Copyright 2012 Freescale Semiconductor, Inc.
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* Copyright 2012 Linaro Ltd.
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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/of_platform.h>
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#include <linux/i2c.h>
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#include <linux/slab.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/soc-dapm.h>
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#include <linux/pinctrl/consumer.h>
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#include "../codecs/wm8962.h"
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#include "imx-audmux.h"
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#define DAI_NAME_SIZE 32
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struct imx_wm8962_data {
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struct snd_soc_dai_link dai;
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struct snd_soc_card card;
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char codec_dai_name[DAI_NAME_SIZE];
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char platform_name[DAI_NAME_SIZE];
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struct clk *codec_clk;
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unsigned int clk_frequency;
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};
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struct imx_priv {
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struct platform_device *pdev;
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};
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static struct imx_priv card_priv;
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static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_SPK("Ext Spk", NULL),
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SND_SOC_DAPM_MIC("AMIC", NULL),
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SND_SOC_DAPM_MIC("DMIC", NULL),
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};
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static int sample_rate = 44100;
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static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE;
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static int imx_hifi_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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sample_rate = params_rate(params);
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sample_format = params_format(params);
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return 0;
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}
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static struct snd_soc_ops imx_hifi_ops = {
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.hw_params = imx_hifi_hw_params,
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};
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static int imx_wm8962_set_bias_level(struct snd_soc_card *card,
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struct snd_soc_dapm_context *dapm,
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enum snd_soc_bias_level level)
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{
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struct snd_soc_pcm_runtime *rtd;
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struct snd_soc_dai *codec_dai;
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struct imx_priv *priv = &card_priv;
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struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
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struct device *dev = &priv->pdev->dev;
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unsigned int pll_out;
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int ret;
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rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
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codec_dai = rtd->codec_dai;
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if (dapm->dev != codec_dai->dev)
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return 0;
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switch (level) {
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case SND_SOC_BIAS_PREPARE:
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if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
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if (sample_format == SNDRV_PCM_FORMAT_S24_LE)
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pll_out = sample_rate * 384;
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else
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pll_out = sample_rate * 256;
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ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
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WM8962_FLL_MCLK, data->clk_frequency,
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pll_out);
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if (ret < 0) {
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dev_err(dev, "failed to start FLL: %d\n", ret);
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return ret;
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}
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ret = snd_soc_dai_set_sysclk(codec_dai,
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WM8962_SYSCLK_FLL, pll_out,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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dev_err(dev, "failed to set SYSCLK: %d\n", ret);
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return ret;
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}
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}
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break;
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case SND_SOC_BIAS_STANDBY:
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if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {
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ret = snd_soc_dai_set_sysclk(codec_dai,
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WM8962_SYSCLK_MCLK, data->clk_frequency,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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dev_err(dev,
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"failed to switch away from FLL: %d\n",
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ret);
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return ret;
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}
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ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
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0, 0, 0);
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if (ret < 0) {
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dev_err(dev, "failed to stop FLL: %d\n", ret);
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return ret;
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}
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}
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break;
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default:
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break;
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}
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return 0;
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}
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static int imx_wm8962_late_probe(struct snd_soc_card *card)
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{
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struct snd_soc_pcm_runtime *rtd;
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struct snd_soc_dai *codec_dai;
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struct imx_priv *priv = &card_priv;
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struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
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struct device *dev = &priv->pdev->dev;
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int ret;
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rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
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codec_dai = rtd->codec_dai;
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
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data->clk_frequency, SND_SOC_CLOCK_IN);
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if (ret < 0)
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dev_err(dev, "failed to set sysclk in %s\n", __func__);
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return ret;
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}
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static int imx_wm8962_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct device_node *ssi_np, *codec_np;
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struct platform_device *ssi_pdev;
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struct imx_priv *priv = &card_priv;
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struct i2c_client *codec_dev;
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struct imx_wm8962_data *data;
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int int_port, ext_port;
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int ret;
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priv->pdev = pdev;
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ret = of_property_read_u32(np, "mux-int-port", &int_port);
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if (ret) {
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dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
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return ret;
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}
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ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
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if (ret) {
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dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
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return ret;
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}
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/*
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* The port numbering in the hardware manual starts at 1, while
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* the audmux API expects it starts at 0.
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*/
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int_port--;
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ext_port--;
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ret = imx_audmux_v2_configure_port(int_port,
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IMX_AUDMUX_V2_PTCR_SYN |
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IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
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IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
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IMX_AUDMUX_V2_PTCR_TFSDIR |
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IMX_AUDMUX_V2_PTCR_TCLKDIR,
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IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
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if (ret) {
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dev_err(&pdev->dev, "audmux internal port setup failed\n");
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return ret;
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}
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ret = imx_audmux_v2_configure_port(ext_port,
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IMX_AUDMUX_V2_PTCR_SYN,
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IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
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if (ret) {
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dev_err(&pdev->dev, "audmux external port setup failed\n");
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return ret;
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}
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ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
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codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
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if (!ssi_np || !codec_np) {
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dev_err(&pdev->dev, "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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ssi_pdev = of_find_device_by_node(ssi_np);
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if (!ssi_pdev) {
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dev_err(&pdev->dev, "failed to find SSI platform device\n");
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ret = -EINVAL;
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goto fail;
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}
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codec_dev = of_find_i2c_device_by_node(codec_np);
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if (!codec_dev || !codec_dev->dev.driver) {
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dev_err(&pdev->dev, "failed to find codec platform device\n");
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ret = -EINVAL;
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goto fail;
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}
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data) {
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ret = -ENOMEM;
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goto fail;
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}
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data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);
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if (IS_ERR(data->codec_clk)) {
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ret = PTR_ERR(data->codec_clk);
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dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
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goto fail;
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}
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data->clk_frequency = clk_get_rate(data->codec_clk);
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ret = clk_prepare_enable(data->codec_clk);
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if (ret) {
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dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);
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goto fail;
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}
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data->dai.name = "HiFi";
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data->dai.stream_name = "HiFi";
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data->dai.codec_dai_name = "wm8962";
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data->dai.codec_of_node = codec_np;
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data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
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data->dai.platform_of_node = ssi_np;
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data->dai.ops = &imx_hifi_ops;
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data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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data->card.dev = &pdev->dev;
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ret = snd_soc_of_parse_card_name(&data->card, "model");
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if (ret)
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goto clk_fail;
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ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
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if (ret)
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goto clk_fail;
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data->card.num_links = 1;
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data->card.owner = THIS_MODULE;
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data->card.dai_link = &data->dai;
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data->card.dapm_widgets = imx_wm8962_dapm_widgets;
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data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
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data->card.late_probe = imx_wm8962_late_probe;
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data->card.set_bias_level = imx_wm8962_set_bias_level;
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platform_set_drvdata(pdev, &data->card);
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snd_soc_card_set_drvdata(&data->card, data);
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ret = devm_snd_soc_register_card(&pdev->dev, &data->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 clk_fail;
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}
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of_node_put(ssi_np);
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of_node_put(codec_np);
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return 0;
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clk_fail:
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clk_disable_unprepare(data->codec_clk);
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fail:
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of_node_put(ssi_np);
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of_node_put(codec_np);
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return ret;
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}
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static int imx_wm8962_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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struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
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if (!IS_ERR(data->codec_clk))
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clk_disable_unprepare(data->codec_clk);
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return 0;
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}
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static const struct of_device_id imx_wm8962_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-wm8962", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
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static struct platform_driver imx_wm8962_driver = {
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.driver = {
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.name = "imx-wm8962",
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.pm = &snd_soc_pm_ops,
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.of_match_table = imx_wm8962_dt_ids,
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},
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.probe = imx_wm8962_probe,
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.remove = imx_wm8962_remove,
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};
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module_platform_driver(imx_wm8962_driver);
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MODULE_AUTHOR("Freescale Semiconductor, Inc.");
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MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:imx-wm8962");
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