Add adsp clock on/off support on mt8186 SoC.
Signed-off-by: Allen-KH Cheng allen-kh.cheng@mediatek.com Signed-off-by: Tinghan Shen tinghan.shen@mediatek.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Yaochun Hung yc.hung@mediatek.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/sof/mediatek/mt8186/Makefile | 2 +- sound/soc/sof/mediatek/mt8186/mt8186-clk.c | 101 +++++++++++++++++++++ sound/soc/sof/mediatek/mt8186/mt8186-clk.h | 24 +++++ sound/soc/sof/mediatek/mt8186/mt8186.c | 15 +++ 4 files changed, 141 insertions(+), 1 deletion(-) create mode 100644 sound/soc/sof/mediatek/mt8186/mt8186-clk.c create mode 100644 sound/soc/sof/mediatek/mt8186/mt8186-clk.h
diff --git a/sound/soc/sof/mediatek/mt8186/Makefile b/sound/soc/sof/mediatek/mt8186/Makefile index 03a12f2096f9..c1f5fc4e2495 100644 --- a/sound/soc/sof/mediatek/mt8186/Makefile +++ b/sound/soc/sof/mediatek/mt8186/Makefile @@ -1,4 +1,4 @@ # SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) -snd-sof-mt8186-objs := mt8186.o mt8186-loader.o +snd-sof-mt8186-objs := mt8186.o mt8186-clk.o mt8186-loader.o obj-$(CONFIG_SND_SOC_SOF_MT8186) += snd-sof-mt8186.o
diff --git a/sound/soc/sof/mediatek/mt8186/mt8186-clk.c b/sound/soc/sof/mediatek/mt8186/mt8186-clk.c new file mode 100644 index 000000000000..5f805981b8e6 --- /dev/null +++ b/sound/soc/sof/mediatek/mt8186/mt8186-clk.c @@ -0,0 +1,101 @@ +// 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 clock + +#include <linux/clk.h> +#include <linux/pm_runtime.h> +#include <linux/io.h> + +#include "../../sof-audio.h" +#include "../../ops.h" +#include "../adsp_helper.h" +#include "mt8186.h" +#include "mt8186-clk.h" + +static const char *adsp_clks[ADSP_CLK_MAX] = { + [CLK_TOP_AUDIODSP] = "audiodsp_sel", + [CLK_TOP_ADSP_BUS] = "adsp_bus_sel", +}; + +int mt8186_adsp_init_clock(struct snd_sof_dev *sdev) +{ + struct adsp_priv *priv = sdev->pdata->hw_pdata; + struct device *dev = sdev->dev; + int i; + + priv->clk = devm_kcalloc(dev, ADSP_CLK_MAX, sizeof(*priv->clk), GFP_KERNEL); + if (!priv->clk) + return -ENOMEM; + + for (i = 0; i < ADSP_CLK_MAX; i++) { + priv->clk[i] = devm_clk_get(dev, adsp_clks[i]); + + if (IS_ERR(priv->clk[i])) + return PTR_ERR(priv->clk[i]); + } + + return 0; +} + +static int adsp_enable_all_clock(struct snd_sof_dev *sdev) +{ + struct adsp_priv *priv = sdev->pdata->hw_pdata; + struct device *dev = sdev->dev; + int ret; + + ret = clk_prepare_enable(priv->clk[CLK_TOP_AUDIODSP]); + if (ret) { + dev_err(dev, "%s clk_prepare_enable(audiodsp) fail %d\n", + __func__, ret); + return ret; + } + + ret = clk_prepare_enable(priv->clk[CLK_TOP_ADSP_BUS]); + if (ret) { + dev_err(dev, "%s clk_prepare_enable(adsp_bus) fail %d\n", + __func__, ret); + clk_disable_unprepare(priv->clk[CLK_TOP_AUDIODSP]); + return ret; + } + + return 0; +} + +static void adsp_disable_all_clock(struct snd_sof_dev *sdev) +{ + struct adsp_priv *priv = sdev->pdata->hw_pdata; + + clk_disable_unprepare(priv->clk[CLK_TOP_ADSP_BUS]); + clk_disable_unprepare(priv->clk[CLK_TOP_AUDIODSP]); +} + +int adsp_clock_on(struct snd_sof_dev *sdev) +{ + struct device *dev = sdev->dev; + int ret; + + ret = adsp_enable_all_clock(sdev); + if (ret) { + dev_err(dev, "failed to adsp_enable_clock: %d\n", ret); + return ret; + } + snd_sof_dsp_write(sdev, DSP_REG_BAR, ADSP_CK_EN, + UART_EN | DMA_EN | TIMER_EN | COREDBG_EN | CORE_CLK_EN); + snd_sof_dsp_write(sdev, DSP_REG_BAR, ADSP_UART_CTRL, + UART_BCLK_CG | UART_RSTN); + + return 0; +} + +void adsp_clock_off(struct snd_sof_dev *sdev) +{ + snd_sof_dsp_write(sdev, DSP_REG_BAR, ADSP_CK_EN, 0); + snd_sof_dsp_write(sdev, DSP_REG_BAR, ADSP_UART_CTRL, 0); + adsp_disable_all_clock(sdev); +} + diff --git a/sound/soc/sof/mediatek/mt8186/mt8186-clk.h b/sound/soc/sof/mediatek/mt8186/mt8186-clk.h new file mode 100644 index 000000000000..fa174dfceff0 --- /dev/null +++ b/sound/soc/sof/mediatek/mt8186/mt8186-clk.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ + +/* + * Copyright (c) 2022 MediaTek Corporation. All rights reserved. + * + * Header file for the mt8186 DSP clock definition + */ + +#ifndef __MT8186_CLK_H +#define __MT8186_CLK_H + +struct snd_sof_dev; + +/* DSP clock */ +enum adsp_clk_id { + CLK_TOP_AUDIODSP, + CLK_TOP_ADSP_BUS, + ADSP_CLK_MAX +}; + +int mt8186_adsp_init_clock(struct snd_sof_dev *sdev); +int adsp_clock_on(struct snd_sof_dev *sdev); +void adsp_clock_off(struct snd_sof_dev *sdev); +#endif diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c index 892cd7d79994..a04cea77bd4d 100644 --- a/sound/soc/sof/mediatek/mt8186/mt8186.c +++ b/sound/soc/sof/mediatek/mt8186/mt8186.c @@ -25,6 +25,7 @@ #include "../../sof-audio.h" #include "../adsp_helper.h" #include "mt8186.h" +#include "mt8186-clk.h"
static int platform_parse_resource(struct platform_device *pdev, void *data) { @@ -276,6 +277,19 @@ static int mt8186_dsp_probe(struct snd_sof_dev *sdev) return ret; }
+ /* enable adsp clock before touching registers */ + ret = mt8186_adsp_init_clock(sdev); + if (ret) { + dev_err(sdev->dev, "mt8186_adsp_init_clock failed\n"); + return ret; + } + + ret = adsp_clock_on(sdev); + if (ret) { + dev_err(sdev->dev, "adsp_clock_on fail!\n"); + return ret; + } + adsp_sram_power_on(sdev);
return 0; @@ -285,6 +299,7 @@ static int mt8186_dsp_remove(struct snd_sof_dev *sdev) { sof_hifixdsp_shutdown(sdev); adsp_sram_power_off(sdev); + adsp_clock_off(sdev);
return 0; }