linux/sound/i2c/cs8427.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Routines for control of the CS8427 via i2c bus
 *  IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 */

#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/bitrev.h>
#include <linux/module.h>
#include <asm/unaligned.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/cs8427.h>
#include <sound/asoundef.h>

static void snd_cs8427_reset(struct snd_i2c_device *cs8427);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;

#define CS8427_ADDR …

struct cs8427_stream { … };

struct cs8427 { … };

int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
			 unsigned char val)
{ … }

EXPORT_SYMBOL(…);

static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
{ … }

static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata)
{ … }

static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
				    int udata,
				    unsigned char *ndata,
				    int count)
{ … }

static void snd_cs8427_free(struct snd_i2c_device *device)
{ … }

int snd_cs8427_init(struct snd_i2c_bus *bus,
		    struct snd_i2c_device *device)
{ … }
EXPORT_SYMBOL(…);

int snd_cs8427_create(struct snd_i2c_bus *bus,
		      unsigned char addr,
		      unsigned int reset_timeout,
		      struct snd_i2c_device **r_cs8427)
{ … }

EXPORT_SYMBOL(…);

/*
 * Reset the chip using run bit, also lock PLL using ILRCK and
 * put back AES3INPUT. This workaround is described in latest
 * CS8427 datasheet, otherwise TXDSERIAL will not work.
 */
static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
{ … }

static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_info *uinfo)
{ … }

static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{ … }

static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_info *uinfo)
{ … }

static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{ … }

static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_info *uinfo)
{ … }

static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{ … }

static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{ … }

static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_info *uinfo)
{ … }

static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{ … }

static const struct snd_kcontrol_new snd_cs8427_iec958_controls[] = …;

int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
			    struct snd_pcm_substream *play_substream,
			    struct snd_pcm_substream *cap_substream)
{ … }

EXPORT_SYMBOL(…);

int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
{ … }

EXPORT_SYMBOL(…);

int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
{ … }

EXPORT_SYMBOL(…);