linux/sound/pci/oxygen/oxygen_pcm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * C-Media CMI8788 driver - PCM code
 *
 * Copyright (c) Clemens Ladisch <[email protected]>
 */

#include <linux/pci.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "oxygen.h"

/* most DMA channels have a 16-bit counter for 32-bit words */
#define BUFFER_BYTES_MAX …
/* the multichannel DMA channel has a 24-bit counter */
#define BUFFER_BYTES_MAX_MULTICH …

#define FIFO_BYTES …
#define FIFO_BYTES_MULTICH …

#define PERIOD_BYTES_MIN …

#define DEFAULT_BUFFER_BYTES …
#define DEFAULT_BUFFER_BYTES_MULTICH …

static const struct snd_pcm_hardware oxygen_stereo_hardware = …;
static const struct snd_pcm_hardware oxygen_multichannel_hardware = …;
static const struct snd_pcm_hardware oxygen_ac97_hardware = …;

static const struct snd_pcm_hardware *const oxygen_hardware[PCM_COUNT] = …;

static inline unsigned int
oxygen_substream_channel(struct snd_pcm_substream *substream)
{ … }

static int oxygen_open(struct snd_pcm_substream *substream,
		       unsigned int channel)
{ … }

static int oxygen_rec_a_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_rec_b_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_rec_c_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_spdif_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_multich_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_ac97_open(struct snd_pcm_substream *substream)
{ … }

static int oxygen_close(struct snd_pcm_substream *substream)
{ … }

static unsigned int oxygen_format(struct snd_pcm_hw_params *hw_params)
{ … }

static unsigned int oxygen_rate(struct snd_pcm_hw_params *hw_params)
{ … }

static unsigned int oxygen_i2s_bits(struct snd_pcm_hw_params *hw_params)
{ … }

static unsigned int oxygen_play_channels(struct snd_pcm_hw_params *hw_params)
{ … }

static const unsigned int channel_base_registers[PCM_COUNT] = …;

static int oxygen_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *hw_params)
{ … }

static u16 get_mclk(struct oxygen *chip, unsigned int channel,
		    struct snd_pcm_hw_params *params)
{ … }

static int oxygen_rec_a_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *hw_params)
{ … }

static int oxygen_rec_b_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *hw_params)
{ … }

static int oxygen_rec_c_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *hw_params)
{ … }

static int oxygen_spdif_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *hw_params)
{ … }

static int oxygen_multich_hw_params(struct snd_pcm_substream *substream,
				    struct snd_pcm_hw_params *hw_params)
{ … }

static int oxygen_hw_free(struct snd_pcm_substream *substream)
{ … }

static int oxygen_spdif_hw_free(struct snd_pcm_substream *substream)
{ … }

static int oxygen_prepare(struct snd_pcm_substream *substream)
{ … }

static int oxygen_trigger(struct snd_pcm_substream *substream, int cmd)
{ … }

static snd_pcm_uframes_t oxygen_pointer(struct snd_pcm_substream *substream)
{ … }

static const struct snd_pcm_ops oxygen_rec_a_ops = …;

static const struct snd_pcm_ops oxygen_rec_b_ops = …;

static const struct snd_pcm_ops oxygen_rec_c_ops = …;

static const struct snd_pcm_ops oxygen_spdif_ops = …;

static const struct snd_pcm_ops oxygen_multich_ops = …;

static const struct snd_pcm_ops oxygen_ac97_ops = …;

int oxygen_pcm_init(struct oxygen *chip)
{ … }