linux/sound/soc/sti/uniperif_player.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) STMicroelectronics SA 2015
 * Authors: Arnaud Pouliquen <[email protected]>
 *          for STMicroelectronics.
 */

#include <linux/clk.h>
#include <linux/mfd/syscon.h>

#include <sound/asoundef.h>
#include <sound/soc.h>

#include "uniperif.h"

/*
 * Some hardware-related definitions
 */

/* sys config registers definitions */
#define SYS_CFG_AUDIO_GLUE …

/*
 * Driver specific types.
 */

#define UNIPERIF_PLAYER_CLK_ADJ_MIN …
#define UNIPERIF_PLAYER_CLK_ADJ_MAX …
#define UNIPERIF_PLAYER_I2S_OUT …

/*
 * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
 * integrate  DAI_CPU capability in term of rate and supported channels
 */
static const struct snd_pcm_hardware uni_player_pcm_hw = …;

/*
 * uni_player_irq_handler
 * In case of error audio stream is stopped; stop action is protected via PCM
 * stream lock to avoid race condition with trigger callback.
 */
static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
{ … }

static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
{ … }

static void uni_player_set_channel_status(struct uniperif *player,
					  struct snd_pcm_runtime *runtime)
{ … }

static int uni_player_prepare_iec958(struct uniperif *player,
				     struct snd_pcm_runtime *runtime)
{ … }

static int uni_player_prepare_pcm(struct uniperif *player,
				  struct snd_pcm_runtime *runtime)
{ … }

static int uni_player_prepare_tdm(struct uniperif *player,
				  struct snd_pcm_runtime *runtime)
{ … }

/*
 * ALSA uniperipheral iec958 controls
 */
static int  uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_info *uinfo)
{ … }

static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{ … }

static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{ … }

static struct snd_kcontrol_new uni_player_iec958_ctl = …;

/*
 * uniperif rate adjustement control
 */
static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_info *uinfo)
{ … }

static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{ … }

static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{ … }

static struct snd_kcontrol_new uni_player_clk_adj_ctl = …;

static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = …;

static struct snd_kcontrol_new *snd_sti_iec_ctl[] = …;

static int uni_player_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{ … }

static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
				 unsigned int freq, int dir)
{ … }

static int uni_player_prepare(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{ … }

static int uni_player_start(struct uniperif *player)
{ … }

static int uni_player_stop(struct uniperif *player)
{ … }

int uni_player_resume(struct uniperif *player)
{ … }
EXPORT_SYMBOL_GPL(…);

static int uni_player_trigger(struct snd_pcm_substream *substream,
			      int cmd, struct snd_soc_dai *dai)
{ … }

static void uni_player_shutdown(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{ … }

static int uni_player_parse_dt_audio_glue(struct platform_device *pdev,
					  struct uniperif *player)
{ … }

static const struct snd_soc_dai_ops uni_player_dai_ops = …;

int uni_player_init(struct platform_device *pdev,
		    struct uniperif *player)
{ … }
EXPORT_SYMBOL_GPL(…);