sound/soc/amlogic/auge/sharebuffer.c

/*
 * sound/soc/amlogic/auge/sharebuffer.c
 *
 * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */
#include <sound/pcm.h>

#include <linux/amlogic/media/sound/aout_notify.h>

#include "sharebuffer.h"
#include "ddr_mngr.h"

#include "spdif_hw.h"

static int sharebuffer_spdifout_prepare(struct snd_pcm_substream *substream,
	struct frddr *fr, int spdif_id, int lane_i2s)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int bit_depth;
	struct iec958_chsts chsts;

	bit_depth = snd_pcm_format_width(runtime->format);

	spdifout_samesource_set(spdif_id,
		aml_frddr_get_fifo_id(fr),
		bit_depth,
		runtime->channels,
		true,
		lane_i2s);

	/* spdif to hdmitx */
	spdifout_to_hdmitx_ctrl(spdif_id);
	/* check and set channel status */
	spdif_get_channel_status_info(&chsts, runtime->rate);
	spdif_set_channel_status_info(&chsts, spdif_id);
	/* notify hdmitx audio */
	aout_notifier_call_chain(0x1, substream);

	return 0;
}

static int sharebuffer_spdifout_free(struct snd_pcm_substream *substream,
	struct frddr *fr, int spdif_id)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int bit_depth;

	bit_depth = snd_pcm_format_width(runtime->format);

	/* spdif b is always on */
	if (spdif_id != 1)
		spdifout_samesource_set(spdif_id,
			aml_frddr_get_fifo_id(fr),
			bit_depth,
			runtime->channels,
			false, 0);

	return 0;
}

void sharebuffer_enable(int sel, bool enable, bool reenable)
{
	if (sel < 0) {
		pr_err("Not support same source\n");
		return;
	} else if (sel < 3) {
		// TODO: same with tdm
	} else if (sel < 5) {
		/* same source with spdif a/b */
		spdifout_enable(sel - 3, enable, reenable);
	}
}

int sharebuffer_prepare(struct snd_pcm_substream *substream,
	void *pfrddr, int samesource_sel, int lane_i2s)
{
	struct frddr *fr = (struct frddr *)pfrddr;

	/* each module prepare, clocks and controls */
	if (samesource_sel < 0) {
		pr_err("Not support same source\n");
		return -EINVAL;
	} else if (samesource_sel < 3) {
		// TODO: same with tdm
	} else if (samesource_sel < 5) {
		/* same source with spdif a/b */
		sharebuffer_spdifout_prepare(substream,
			fr, samesource_sel - 3, lane_i2s);
	}

	/* frddr, share buffer, src_sel1 */
	aml_frddr_select_dst_ss(fr, samesource_sel, 1, true);

	return 0;
}

int sharebuffer_free(struct snd_pcm_substream *substream,
	void *pfrddr, int samesource_sel)
{
	struct frddr *fr = (struct frddr *)pfrddr;

	/* each module prepare, clocks and controls */
	if (samesource_sel < 0) {
		pr_err("Not support same source\n");
		return -EINVAL;
	} else if (samesource_sel < 3) {
		// TODO: same with tdm
	} else if (samesource_sel < 5) {
		/* same source with spdif a/b */
		sharebuffer_spdifout_free(substream, fr, samesource_sel - 3);
	}

	/* frddr, share buffer, src_sel1 */
	aml_frddr_select_dst_ss(fr, samesource_sel, 1, false);

	return 0;
}


int sharebuffer_trigger(int cmd, int samesource_sel, bool reenable)
{
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		sharebuffer_enable(samesource_sel, true, reenable);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		sharebuffer_enable(samesource_sel, false, reenable);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

void sharebuffer_get_mclk_fs_ratio(int samesource_sel,
	int *pll_mclk_ratio, int *mclk_fs_ratio)
{
	if (samesource_sel < 0) {
		pr_err("Not support same source\n");
	} else if (samesource_sel < 3) {
		// TODO: same with tdm
	} else if (samesource_sel < 5) {
		/* spdif a/b */
		*pll_mclk_ratio = 4;
		*mclk_fs_ratio = 128;
	}
}