linux/sound/soc/sof/intel/hda-pcm.c

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license.  When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation
//
// Authors: Liam Girdwood <[email protected]>
//	    Ranjani Sridharan <[email protected]>
//	    Rander Wang <[email protected]>
//          Keyon Jie <[email protected]>
//

/*
 * Hardware interface for generic Intel audio DSP HDA IP
 */

#include <linux/moduleparam.h>
#include <sound/hda_register.h>
#include <sound/pcm_params.h>
#include <trace/events/sof_intel.h>
#include "../sof-audio.h"
#include "../ops.h"
#include "hda.h"

#define SDnFMT_BASE(x) …
#define SDnFMT_MULT(x) …
#define SDnFMT_DIV(x) …
#define SDnFMT_BITS(x) …
#define SDnFMT_CHAN(x) …

static bool hda_always_enable_dmi_l1;
module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444);
MODULE_PARM_DESC(…) …;

static bool hda_disable_rewinds;
module_param_named(disable_rewinds, hda_disable_rewinds, bool, 0444);
MODULE_PARM_DESC(…) …;

u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
{
	switch (rate) {
	case 8000:
		return SDnFMT_DIV(6);
	case 9600:
		return SDnFMT_DIV(5);
	case 11025:
		return SDnFMT_BASE(1) | SDnFMT_DIV(4);
	case 16000:
		return SDnFMT_DIV(3);
	case 22050:
		return SDnFMT_BASE(1) | SDnFMT_DIV(2);
	case 32000:
		return SDnFMT_DIV(3) | SDnFMT_MULT(2);
	case 44100:
		return SDnFMT_BASE(1);
	case 48000:
		return 0;
	case 88200:
		return SDnFMT_BASE(1) | SDnFMT_MULT(2);
	case 96000:
		return SDnFMT_MULT(2);
	case 176400:
		return SDnFMT_BASE(1) | SDnFMT_MULT(4);
	case 192000:
		return SDnFMT_MULT(4);
	default:
		dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
			 rate);
		return 0; /* use 48KHz if not found */
	}
};

u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
{
	switch (sample_bits) {
	case 8:
		return SDnFMT_BITS(0);
	case 16:
		return SDnFMT_BITS(1);
	case 20:
		return SDnFMT_BITS(2);
	case 24:
		return SDnFMT_BITS(3);
	case 32:
		return SDnFMT_BITS(4);
	default:
		dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
			 sample_bits);
		return SDnFMT_BITS(1); /* use 16bits format if not found */
	}
};

int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
			  struct snd_pcm_substream *substream,
			  struct snd_pcm_hw_params *params,
			  struct snd_sof_platform_stream_params *platform_params)
{ … }
EXPORT_SYMBOL_NS(…);

/* update SPIB register with appl position */
int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL_NS(…);

int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
			struct snd_pcm_substream *substream, int cmd)
{ … }
EXPORT_SYMBOL_NS(…);

snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
				      struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL_NS(…);

int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
		     struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL_NS(…);

int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
		      struct snd_pcm_substream *substream)
{ … }
EXPORT_SYMBOL_NS(…);