path: root/sound/pci/hda/cs35l56_hda.c

// SPDX-License-Identifier: GPL-2.0-only
//
// HDA audio driver for Cirrus Logic CS35L56 smart amp
//
// Copyright (C) 2023 Cirrus Logic, Inc. and
//                    Cirrus Logic International Semiconductor Ltd.
//

#include <linux/acpi.h>
#include <linux/debugfs.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/cs-amp-lib.h>
#include <sound/hda_codec.h>
#include <sound/tlv.h>
#include "cirrus_scodec.h"
#include "cs35l56_hda.h"
#include "hda_component.h"
#include "hda_cs_dsp_ctl.h"
#include "hda_generic.h"

 /*
  * The cs35l56_hda_dai_config[] reg sequence configures the device as
  *  ASP1_BCLK_FREQ = 3.072 MHz
  *  ASP1_RX_WIDTH = 32 cycles per slot, ASP1_TX_WIDTH = 32 cycles per slot, ASP1_FMT = I2S
  *  ASP1_DOUT_HIZ_CONTROL = Hi-Z during unused timeslots
  *  ASP1_RX_WL = 24 bits per sample
  *  ASP1_TX_WL = 24 bits per sample
  *  ASP1_RXn_EN 1..3 and ASP1_TXn_EN 1..4 disabled
  *
  * Override any Windows-specific mixer settings applied by the firmware.
  */
static const struct reg_sequence cs35l56_hda_dai_config[] = {
	{ CS35L56_ASP1_CONTROL1,	0x00000021 },
	{ CS35L56_ASP1_CONTROL2,	0x20200200 },
	{ CS35L56_ASP1_CONTROL3,	0x00000003 },
	{ CS35L56_ASP1_FRAME_CONTROL1,	0x03020100 },
	{ CS35L56_ASP1_FRAME_CONTROL5,	0x00020100 },
	{ CS35L56_ASP1_DATA_CONTROL5,	0x00000018 },
	{ CS35L56_ASP1_DATA_CONTROL1,	0x00000018 },
	{ CS35L56_ASP1_ENABLES1,	0x00000000 },
	{ CS35L56_ASP1TX1_INPUT,	0x00000018 },
	{ CS35L56_ASP1TX2_INPUT,	0x00000019 },
	{ CS35L56_ASP1TX3_INPUT,	0x00000020 },
	{ CS35L56_ASP1TX4_INPUT,	0x00000028 },

};

static void cs35l56_hda_wait_dsp_ready(struct cs35l56_hda *cs35l56)
{
	/* Wait for patching to complete */
	flush_work(&cs35l56->dsp_work);
}

static void cs35l56_hda_play(struct cs35l56_hda *cs35l56)
{
	unsigned int val;
	int ret;

	cs35l56_hda_wait_dsp_ready(cs35l56);

	pm_runtime_get_sync(cs35l56->base.dev);
	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PLAY);
	if (ret == 0) {
		/* Wait for firmware to enter PS0 power state */
		ret = regmap_read_poll_timeout(cs35l56->base.regmap,
					       CS35L56_TRANSDUCER_ACTUAL_PS,
					       val, (val == CS35L56_PS0),
					       CS35L56_PS0_POLL_US,
					       CS35L56_PS0_TIMEOUT_US);
		if (ret)
			dev_warn(cs35l56->base.dev, "PS0 wait failed: %d\n", ret);
	}
	regmap_set_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
			BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
			cs35l56->asp_tx_mask);
	cs35l56->playing = true;
}

static void cs35l56_hda_pause(struct cs35l56_hda *cs35l56)
{
	cs35l56->playing = false;
	cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PAUSE);
	regmap_clear_bits(cs35l56->base.regmap, CS35L56_ASP1_ENABLES1,
			  BIT(CS35L56_ASP_RX1_EN_SHIFT) | BIT(CS35L56_ASP_RX2_EN_SHIFT) |
			  BIT(CS35L56_ASP_TX1_EN_SHIFT) | BIT(CS35L56_ASP_TX2_EN_SHIFT) |
			  BIT(CS35L56_ASP_TX3_EN_SHIFT) | BIT(CS35L56_ASP_TX4_EN_SHIFT));

	pm_runtime_mark_last_busy(cs35l56->base.dev);
	pm_runtime_put_autosuspend(cs35l56->base.dev);
}

static void cs35l56_hda_playback_hook(struct device *dev, int action)
{
	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);

	dev_dbg(cs35l56->base.dev, "%s()%d: action: %d\n", __func__, __LINE__, action);

	switch (action) {
	case HDA_GEN_PCM_ACT_PREPARE:
		if (cs35l56->playing)
			break;

		/* If we're suspended: flag that resume should start playback */
		if (cs35l56->suspended) {
			cs35l56->playing = true;
			break;
		}

		cs35l56_hda_play(cs35l56);
		break;
	case HDA_GEN_PCM_ACT_CLEANUP:
		if (!cs35l56->playing)
			break;

		cs35l56_hda_pause(cs35l56);
		break;
	default:
		break;
	}
}

static int cs35l56_hda_runtime_suspend(struct device *dev)
{
	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);

	if (cs35l56->cs_dsp.booted)
		cs_dsp_stop(&cs35l56->cs_dsp);

	return cs35l56_runtime_suspend_common(&cs35l56->base);
}

static int cs35l56_hda_runtime_resume(struct device *dev)
{
	struct cs35l56_hda *cs35l56 = dev_get_drvdata(dev);
	int ret;

	ret = cs35l56_runtime_resume_common(&cs35l56->base, false);
	if (ret < 0)
		return ret;

	if (cs35l56->cs_dsp.booted) {
		ret = cs_dsp_run(&cs35l56->cs_dsp);
		if (ret) {
			dev_dbg(cs35l56->base.dev, "%s: cs_dsp_run ret %d\n", __func__,