Hung-Te Lin submitted this change.

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soc/mediatek/mt8192: Init SSPM

SSPM is "Secure System Power Manager" that provides power control in
secure domain. The initialization flow is to load SSPM firmware to
its SRAM space and then enable.

Signed-off-by: TingHan.Shen <tinghan.shen@mediatek.com>
Change-Id: Ia834852af50e9e7e1b1222ed1e2be20e43139c62
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47786
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
M src/soc/mediatek/mt8192/Kconfig
M src/soc/mediatek/mt8192/Makefile.inc
M src/soc/mediatek/mt8192/include/soc/addressmap.h
A src/soc/mediatek/mt8192/include/soc/sspm.h
M src/soc/mediatek/mt8192/soc.c
A src/soc/mediatek/mt8192/sspm.c
6 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/src/soc/mediatek/mt8192/Kconfig b/src/soc/mediatek/mt8192/Kconfig
index 67e5a52..7373fe1 100644
--- a/src/soc/mediatek/mt8192/Kconfig
+++ b/src/soc/mediatek/mt8192/Kconfig
@@ -69,4 +69,10 @@
 	help
 	  The file name of the MediaTek SPM firmware.
 
+config SSPM_FIRMWARE
+	string
+	default "sspm.bin"
+	help
+	  The file name of the MediaTek SSPM firmware.
+
 endif
diff --git a/src/soc/mediatek/mt8192/Makefile.inc b/src/soc/mediatek/mt8192/Makefile.inc
index c02eabc..bd6fe27 100644
--- a/src/soc/mediatek/mt8192/Makefile.inc
+++ b/src/soc/mediatek/mt8192/Makefile.inc
@@ -46,6 +46,7 @@
 ramstage-y += ../common/mtcmos.c mtcmos.c
 ramstage-y += soc.c
 ramstage-y += spm.c
+ramstage-y += sspm.c
 ramstage-y += ../common/timer.c
 ramstage-y += ../common/uart.c
 ramstage-y += ../common/usb.c usb.c
@@ -56,6 +57,7 @@
 	$(CONFIG_DPM_DM_FIRMWARE) \
 	$(CONFIG_DPM_PM_FIRMWARE) \
 	$(CONFIG_MCUPM_FIRMWARE) \
+	$(CONFIG_SSPM_FIRMWARE) \
 	$(CONFIG_SPM_FIRMWARE)
 
 $(foreach fw, $(call strip_quotes,$(mcu-firmware-files)), \
diff --git a/src/soc/mediatek/mt8192/include/soc/addressmap.h b/src/soc/mediatek/mt8192/include/soc/addressmap.h
index 2e8ac9e..8297129 100644
--- a/src/soc/mediatek/mt8192/include/soc/addressmap.h
+++ b/src/soc/mediatek/mt8192/include/soc/addressmap.h
@@ -27,6 +27,8 @@
 	PMIF_SPMI_BASE		= IO_PHYS + 0x00027000,
 	PMICSPI_MST_BASE	= IO_PHYS + 0x00028000,
 	SPMI_MST_BASE		= IO_PHYS + 0x00029000,
+	SSPM_SRAM_BASE		= IO_PHYS + 0x00400000,
+	SSPM_CFG_BASE		= IO_PHYS + 0x00440000,
 	DPM_PM_SRAM_BASE	= IO_PHYS + 0x00900000,
 	DPM_DM_SRAM_BASE	= IO_PHYS + 0x00920000,
 	DPM_CFG_BASE		= IO_PHYS + 0x00940000,
diff --git a/src/soc/mediatek/mt8192/include/soc/sspm.h b/src/soc/mediatek/mt8192/include/soc/sspm.h
new file mode 100644
index 0000000..5749fa4
--- /dev/null
+++ b/src/soc/mediatek/mt8192/include/soc/sspm.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_MT8192_SSPM_H
+#define SOC_MEDIATEK_MT8192_SSPM_H
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+struct mt8192_sspm_regs {
+	u32 sw_rstn;
+};
+static struct mt8192_sspm_regs *const mt8192_sspm = (void *)SSPM_CFG_BASE;
+void sspm_init(void);
+#endif  /* SOC_MEDIATEK_MT8192_SSPM_H */
diff --git a/src/soc/mediatek/mt8192/soc.c b/src/soc/mediatek/mt8192/soc.c
index 00a57d2..bf9e8e7 100644
--- a/src/soc/mediatek/mt8192/soc.c
+++ b/src/soc/mediatek/mt8192/soc.c
@@ -4,6 +4,7 @@
 #include <soc/emi.h>
 #include <soc/mcupm.h>
 #include <soc/mmu_operations.h>
+#include <soc/sspm.h>
 #include <symbols.h>
 
 static void soc_read_resources(struct device *dev)
@@ -15,6 +16,7 @@
 {
 	mtk_mmu_disable_l2c_sram();
 	mcupm_init();
+	sspm_init();
 }
 
 static struct device_operations soc_ops = {
diff --git a/src/soc/mediatek/mt8192/sspm.c b/src/soc/mediatek/mt8192/sspm.c
new file mode 100644
index 0000000..b36e0df
--- /dev/null
+++ b/src/soc/mediatek/mt8192/sspm.c
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/mmio.h>
+#include <soc/mcu_common.h>
+#include <soc/sspm.h>
+#include <soc/symbols.h>
+
+static void reset_sspm(struct mtk_mcu *mcu)
+{
+	write32(&mt8192_sspm->sw_rstn, 0x1);
+}
+
+static struct mtk_mcu sspm = {
+	.firmware_name = CONFIG_SSPM_FIRMWARE,
+	.run_address = (void *)SSPM_SRAM_BASE,
+	.reset = reset_sspm,
+};
+
+void sspm_init(void)
+{
+	sspm.load_buffer = _dram_dma;
+	sspm.buffer_size = REGION_SIZE(dram_dma);
+
+	mtk_init_mcu(&sspm);
+}

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