soc/mediatek/mt8186: Inititalize ADSP

To use SOF correctly, we need to initialize ADSP in coreboot stage.

TEST=SOF driver is functional.
BUG=b:204229221

Change-Id: I45db587252ccdcdf75e0be2029743034a79925c5
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68289
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8186/Makefile.inc

@@ -27,6 +27,7 @@ romstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
 romstage-y += ../common/pmic_wrap.c pmic_wrap.c pmif.c mt6366.c
 romstage-y += ../common/rtc.c ../common/rtc_osc_init.c rtc.c
 
+ramstage-y += adsp.c
 ramstage-y += ../common/auxadc.c
 ramstage-$(CONFIG_ARM64_USE_ARM_TRUSTED_FIRMWARE) += ../common/bl31.c
 ramstage-y += ../common/ddp.c ddp.c

src/soc/mediatek/mt8186/adsp.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+#include <soc/adsp.h>
+
+void mtk_adsp_init(void)
+{
+	/* [0] CORE_CLK_EN, [1] COREDBG_EN, [3] TIMER_EN, [4] DMA_EN, [5] UART_EN */
+	setbits32(&mt8186_audiodsp->audiodsp_adsp_ck_en, 0x0000003B);
+}

src/soc/mediatek/mt8186/include/soc/addressmap.h

@@ -50,6 +50,7 @@ enum {
 	DRAMC_CHA_AO_BASE		= IO_PHYS + 0x00220000,
 	SSPM_SRAM_BASE			= IO_PHYS + 0x00400000,
 	SSPM_CFG_BASE			= IO_PHYS + 0x00440000,
+	AUDIODSP_BASE			= IO_PHYS + 0x00680000,
 	SFLASH_REG_BASE			= IO_PHYS + 0x01000000,
 	AUXADC_BASE			= IO_PHYS + 0x01001000,
 	UART0_BASE			= IO_PHYS + 0x01002000,

src/soc/mediatek/mt8186/include/soc/adsp.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_MT8186_ADSP_H
+#define SOC_MEDIATEK_MT8186_ADSP_H
+
+#include <soc/addressmap.h>
+
+struct mt8186_audiodsp_regs {
+	u32 reserved1[1024];
+	u32 audiodsp_adsp_ck_en;
+};
+check_member(mt8186_audiodsp_regs, audiodsp_adsp_ck_en, 0x1000);
+
+static struct mt8186_audiodsp_regs *const mt8186_audiodsp = (void *)AUDIODSP_BASE;
+
+void mtk_adsp_init(void);
+
+#endif

src/soc/mediatek/mt8186/soc.c

@@ -2,10 +2,12 @@
 
 #include <bootmem.h>
 #include <device/device.h>
+#include <soc/adsp.h>
 #include <soc/devapc.h>
 #include <soc/dfd.h>
 #include <soc/emi.h>
 #include <soc/mmu_operations.h>
+#include <soc/mtcmos.h>
 #include <soc/sspm.h>
 #include <symbols.h>
 
@@ -24,6 +26,12 @@ static void soc_init(struct device *dev)
 {
 	mtk_mmu_disable_l2c_sram();
 	sspm_init();
+
+	/* ADSP is required for all MT8186 projects, so it's initialized in soc.c */
+	mtcmos_adsp_power_on();
+	mtcmos_protect_adsp_bus();
+	mtk_adsp_init();
+
 	dapc_init();
 
 	if (CONFIG(MTK_DFD))