[PATCH v1 2/4] ASoC: SOF: mediatek: Add mt8186 sof fw loader and dsp ops

[Tinghan Shen]

Add mt8186-loader module with ops callback to load and run firmware
on mt8186 SoC.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng at mediatek.com>
Signed-off-by: Tinghan Shen <tinghan.shen at mediatek.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Reviewed-by: Yaochun Hung <yc.hung at mediatek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 sound/soc/sof/mediatek/mt8186/Makefile        |  2 +-
 sound/soc/sof/mediatek/mt8186/mt8186-loader.c | 53 +++++++++++++++++++
 sound/soc/sof/mediatek/mt8186/mt8186.c        | 18 +++++++
 sound/soc/sof/mediatek/mt8186/mt8186.h        |  3 ++
 4 files changed, 75 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/sof/mediatek/mt8186/mt8186-loader.c

diff --git a/sound/soc/sof/mediatek/mt8186/Makefile b/sound/soc/sof/mediatek/mt8186/Makefile
index e0e971c17d5e..03a12f2096f9 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
+snd-sof-mt8186-objs := mt8186.o mt8186-loader.o
 obj-$(CONFIG_SND_SOC_SOF_MT8186) += snd-sof-mt8186.o
 
diff --git a/sound/soc/sof/mediatek/mt8186/mt8186-loader.c b/sound/soc/sof/mediatek/mt8186/mt8186-loader.c
new file mode 100644
index 000000000000..6ab4921b1010
--- /dev/null
+++ b/sound/soc/sof/mediatek/mt8186/mt8186-loader.c
@@ -0,0 +1,53 @@
+// 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 at mediatek.com>
+//         Tinghan Shen <tinghan.shen at mediatek.com>
+//
+// Hardware interface for mt8186 DSP code loader
+
+#include <sound/sof.h>
+#include "mt8186.h"
+#include "../../ops.h"
+
+void 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);
+
+	/* 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 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);
+}
+
diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c
index 60021195e0b5..892cd7d79994 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.c
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.c
@@ -204,6 +204,17 @@ static int adsp_shared_base_ioremap(struct platform_device *pdev, void *data)
 	return 0;
 }
 
+static int mt8186_run(struct snd_sof_dev *sdev)
+{
+	u32 adsp_bootup_addr;
+
+	adsp_bootup_addr = SRAM_PHYS_BASE_FROM_DSP_VIEW;
+	dev_dbg(sdev->dev, "HIFIxDSP boot from base : 0x%08X\n", adsp_bootup_addr);
+	sof_hifixdsp_boot_sequence(sdev, adsp_bootup_addr);
+
+	return 0;
+}
+
 static int mt8186_dsp_probe(struct snd_sof_dev *sdev)
 {
 	struct platform_device *pdev = container_of(sdev->dev, struct platform_device, dev);
@@ -272,6 +283,7 @@ static int mt8186_dsp_probe(struct snd_sof_dev *sdev)
 
 static int mt8186_dsp_remove(struct snd_sof_dev *sdev)
 {
+	sof_hifixdsp_shutdown(sdev);
 	adsp_sram_power_off(sdev);
 
 	return 0;
@@ -289,6 +301,9 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = {
 	.probe		= mt8186_dsp_probe,
 	.remove		= mt8186_dsp_remove,
 
+	/* DSP core boot */
+	.run		= mt8186_run,
+
 	/* Block IO */
 	.block_read	= sof_block_read,
 	.block_write	= sof_block_write,
@@ -302,6 +317,9 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = {
 	/* misc */
 	.get_bar_index	= mt8186_get_bar_index,
 
+	/* firmware loading */
+	.load_firmware	= snd_sof_load_firmware_memcpy,
+
 	/* Firmware ops */
 	.dsp_arch_ops = &sof_xtensa_arch_ops,
 
diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.h b/sound/soc/sof/mediatek/mt8186/mt8186.h
index 40ea7cb9295b..df52ae9659e4 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.h
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.h
@@ -10,6 +10,7 @@
 #define __MT8186_H
 
 struct mtk_adsp_chip_info;
+struct snd_sof_dev;
 
 #define DSP_REG_BAR			4
 #define DSP_SECREG_BAR			5
@@ -74,4 +75,6 @@ struct mtk_adsp_chip_info;
 #define SIZE_SHARED_DRAM_UL			0x40000 /*Shared buffer for Uplink*/
 #define TOTAL_SIZE_SHARED_DRAM_FROM_TAIL	(SIZE_SHARED_DRAM_DL + SIZE_SHARED_DRAM_UL)
 
+void sof_hifixdsp_boot_sequence(struct snd_sof_dev *sdev, u32 boot_addr);
+void sof_hifixdsp_shutdown(struct snd_sof_dev *sdev);
 #endif
-- 
2.18.0