path: root/sound/soc/fsl/fsl-asoc-card.c

// SPDX-License-Identifier: GPL-2.0
//
// Freescale Generic ASoC Sound Card driver with ASRC
//
// Copyright (C) 2014 Freescale Semiconductor, Inc.
//
// Author: Nicolin Chen <nicoleotsuka@gmail.com>

#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#if IS_ENABLED(CONFIG_SND_AC97_CODEC)
#include <sound/ac97_codec.h>
#endif
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/simple_card_utils.h>

#include "fsl_esai.h"
#include "fsl_sai.h"
#include "imx-audmux.h"

#include "../codecs/sgtl5000.h"
#include "../codecs/wm8962.h"
#include "../codecs/wm8960.h"

#define CS427x_SYSCLK_MCLK 0

#define RX 0
#define TX 1

/* Default DAI format without Master and Slave flag */
#define DAI_FMT_BASE (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF)

/**
 * struct codec_priv - CODEC private data
 * @mclk_freq: Clock rate of MCLK
 * @mclk_id: MCLK (or main clock) id for set_sysclk()
 * @fll_id: FLL (or secordary clock) id for set_sysclk()
 * @pll_id: PLL id for set_pll()
 */
struct codec_priv {
	unsigned long mclk_freq;
	u32 mclk_id;
	u32 fll_id;
	u32 pll_id;
};

/**
 * struct cpu_priv - CPU private data
 * @sysclk_freq: SYSCLK rates for set_sysclk()
 * @sysclk_dir: SYSCLK directions for set_sysclk()
 * @sysclk_id: SYSCLK ids for set_sysclk()
 * @slot_width: Slot width of each frame
 *
 * Note: [1] for tx and [0] for rx
 */
struct cpu_priv {
	unsigned long sysclk_freq[2];
	u32 sysclk_dir[2];
	u32 sysclk_id[2];
	u32 slot_width;
};

/**
 * struct fsl_asoc_card_priv - Freescale Generic ASOC card private data
 * @dai_link: DAI link structure including normal one and DPCM link
 * @hp_jack: Headphone Jack structure
 * @mic_jack: Microphone Jack structure
 * @pdev: platform device pointer
 * @codec_priv: CODEC private data
 * @cpu_priv: CPU private data
 * @card: ASoC card structure
 * @streams: Mask of current active streams
 * @sample_rate: Current sample rate
 * @sample_format: Current sample format
 * @asrc_rate: ASRC sample rate used by Back-Ends
 * @asrc_format: ASRC sample format used by Back-Ends
 * @dai_fmt: DAI format between CPU and CODEC
 * @name: Card name
 */

struct fsl_asoc_card_priv {
	struct snd_soc_dai_link dai_link[3];
	struct asoc_simple_jack hp_jack;
	struct asoc_simple_jack mic_jack;
	struct platform_device *pdev;
	struct codec_priv codec_priv;
	struct cpu_priv cpu_priv;
	struct snd_soc_card card;
	u8 streams;
	u32 sample_rate;
	snd_pcm_format_t sample_format;
	u32 asrc_rate;
	snd_pcm_format_t asrc_format;
	u32 dai_fmt;
	char name[32];
};

/*
 * This dapm route map exists for DPCM link only.
 * The other routes shall go through Device Tree.
 *
 * Note: keep all ASRC routes in the second half
 *	 to drop them easily for non-ASRC cases.
 */
static const struct snd_soc_dapm_route audio_map[] = {
	/* 1st half -- Normal DAPM routes */
	{"Playback",  NULL, "CPU-Playback"},
	{"CPU-Capture",  NULL, "Capture"},
	/* 2nd half -- ASRC DAPM routes */
	{"CPU-Playback",  NULL, "ASRC-Playback"},
	{"ASRC-Capture",  NULL, "CPU-Capture"},
};

static const struct snd_soc_dapm_route audio_map_ac97[] = {
	/* 1st half -- Normal DAPM routes */
	{"Playback",  NULL, "AC97 Playback"},
	{"AC97 Capture",  NULL, "Capture"},
	/* 2nd half -- ASRC DAPM routes */
	{"AC97 Playback",  NULL, "ASRC-Playback"},
	{"ASRC-Capture",  NULL, "AC97 Capture"},
};

static const struct snd_soc_dapm_route audio_map_tx[] = {
	/* 1st half -- Normal DAPM routes */
	{"Playback",  NULL, "CPU-Playback"},
	/* 2nd half -- ASRC DAPM routes */
	{"CPU-Playback",  NULL, "ASRC-Playback"},
};

/* Add all possible widgets into here without being redundant */
static const struct snd_soc_dapm_widget fsl_asoc_card_dapm_widgets[] = {
	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
	SND_SOC_DAPM_LINE("Line In Jack", NULL),
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_MIC("AMIC", NULL),
	SND_SOC_DAPM_MIC("DMIC", NULL),
};

static bool fsl_asoc_card_is_ac97(struct fsl_asoc_card_priv *priv)
{
	return priv->dai_fmt == SND_SOC_DAIFMT_AC97;
}

static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
				   struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	struct codec_priv *codec_priv = &priv->codec_priv;
	struct cpu_priv *cpu_priv = &priv->cpu_priv;
	struct device *dev = rtd->card->dev;
	unsigned int pll_out;
	int ret;

	priv->sample_rate = params_rate(params);
	priv->sample_format = params_format(params);
	priv->streams |= BIT(substream->stream);

	if (fsl_asoc_card_is_ac97(priv))
		return 0;

	/* Specific configurations of DAIs starts from here */
	ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), cpu_priv->sysclk_id[tx],
				     cpu_priv->sysclk_freq[tx],
				     cpu_priv->sysclk_dir[tx]);
	if (ret && ret != -ENOTSUPP) {
		dev_err(dev, "failed to set sysclk for cpu dai\n");
		goto fail;
	}

	if (cpu_priv->slot_width) {
		ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2,
					       cpu_priv->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dev, "failed to set TDM slot for cpu dai\n");
			goto fail;
		}
	}

	/* Specific configuration for PLL */
	if (codec_priv->pll_id && codec_priv->fll_id) {
		if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
			pll_out = priv->sample_rate * 384;
		else
			pll_out = priv->sample_rate * 256;

		ret = snd_soc_dai_set_pll(asoc_rtd_to_codec