soc/mediatek/mt8192: Init DPM

DPM is a hardware module for DRAM power management and for better
power saving in low power mode.

BUG=none
TEST=Boots correctly on Asurada

Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Change-Id: I16b341ad63940b45b886c4a7fd733c1970624e40
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46393
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8192/dpm.c b/src/soc/mediatek/mt8192/dpm.c
new file mode 100644
index 0000000000..7acdf68feb
--- /dev/null
+++ b/src/soc/mediatek/mt8192/dpm.c
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/mmio.h>
+#include <soc/dpm.h>
+#include <soc/mcu_common.h>
+#include <soc/symbols.h>
+
+static void reset_dpm(struct mtk_mcu *mcu)
+{
+	/* write bootargs */
+	write32(&mtk_dpm->twam_window_len, 0x0);
+	write32(&mtk_dpm->twam_mon_type, 0x0);
+
+	/* free RST */
+	setbits32(&mtk_dpm->sw_rstn, DPM_SW_RSTN_RESET);
+}
+
+static struct mtk_mcu dpm_mcu[] = {
+	{
+		.firmware_name = CONFIG_DPM_DM_FIRMWARE,
+		.run_address = (void *)DPM_DM_SRAM_BASE,
+	},
+	{
+		.firmware_name = CONFIG_DPM_PM_FIRMWARE,
+		.run_address = (void *)DPM_PM_SRAM_BASE,
+		.reset = reset_dpm,
+	},
+};
+
+int dpm_init(void)
+{
+	int i;
+	struct mtk_mcu *dpm;
+
+	/* config DPM SRAM layout */
+	clrsetbits32(&mtk_dpm->sw_rstn, DPM_MEM_RATIO_MASK, DPM_MEM_RATIO_CFG1);
+
+	for (i = 0; i < ARRAY_SIZE(dpm_mcu); i++) {
+		dpm = &dpm_mcu[i];
+		dpm->load_buffer = _dram_dma;
+		dpm->buffer_size = REGION_SIZE(dram_dma);
+		if (mtk_init_mcu(dpm))
+			return -1;
+	}
+
+	return 0;
+}