sound/soc/sof/mediatek/mt8186/mt8186-loader.c

Source file repositories/reference/linux-study-clean/sound/soc/sof/mediatek/mt8186/mt8186-loader.c

File Facts

System
Linux kernel
Corpus path
sound/soc/sof/mediatek/mt8186/mt8186-loader.c
Extension
.c
Size
1723 bytes
Lines
59
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// Copyright (c) 2022 Mediatek Corporation. All rights reserved.
//
// Author: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
//         Tinghan Shen <tinghan.shen@mediatek.com>
//
// Hardware interface for mt8186 DSP code loader

#include <sound/sof.h>
#include "mt8186.h"
#include "../../ops.h"

void mt8186_sof_hifixdsp_boot_sequence(struct snd_sof_dev *sdev, u32 boot_addr)
{
	/* set RUNSTALL to stop core */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_HIFI_IO_CONFIG,
				RUNSTALL, RUNSTALL);

	/* enable mbox 0 & 1 IRQ */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_MBOX_IRQ_EN,
				DSP_MBOX0_IRQ_EN | DSP_MBOX1_IRQ_EN,
				DSP_MBOX0_IRQ_EN | DSP_MBOX1_IRQ_EN);

	/* set core boot address */
	snd_sof_dsp_write(sdev, DSP_SECREG_BAR, ADSP_ALTVEC_C0, boot_addr);
	snd_sof_dsp_write(sdev, DSP_SECREG_BAR, ADSP_ALTVECSEL, ADSP_ALTVECSEL_C0);

	/* assert core reset */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_CFGREG_SW_RSTN,
				SW_RSTN_C0 | SW_DBG_RSTN_C0,
				SW_RSTN_C0 | SW_DBG_RSTN_C0);

	/* hardware requirement */
	udelay(1);

	/* release core reset */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_CFGREG_SW_RSTN,
				SW_RSTN_C0 | SW_DBG_RSTN_C0,
				0);

	/* clear RUNSTALL (bit31) to start core */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_HIFI_IO_CONFIG,
				RUNSTALL, 0);
}

void mt8186_sof_hifixdsp_shutdown(struct snd_sof_dev *sdev)
{
	/* set RUNSTALL to stop core */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_HIFI_IO_CONFIG,
				RUNSTALL, RUNSTALL);

	/* assert core reset */
	snd_sof_dsp_update_bits(sdev, DSP_REG_BAR, ADSP_CFGREG_SW_RSTN,
				SW_RSTN_C0 | SW_DBG_RSTN_C0,
				SW_RSTN_C0 | SW_DBG_RSTN_C0);
}

Annotation

Implementation Notes