feat(mt8188): add DFD control in SiP service

DFD (Design for Debug) is a debugging tool, which scans flip-flops and
dumps to internal RAM on the WDT reset. After system reboots, those
values could be showed for debugging.

TEST=build pass.
BUG=b:244216434

Signed-off-by: Fengquan Chen <fengquan.chen@mediatek.corp-partner.google.com>
Change-Id: I468036131e941a46bc1ec12d33105146000730d8
diff --git a/plat/mediatek/drivers/dfd/mt8188/plat_dfd.c b/plat/mediatek/drivers/dfd/mt8188/plat_dfd.c
new file mode 100644
index 0000000..1aa68f5
--- /dev/null
+++ b/plat/mediatek/drivers/dfd/mt8188/plat_dfd.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2022, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <dfd.h>
+#include <plat_dfd.h>
+
+static uint64_t dfd_cache_dump;
+static bool dfd_enabled;
+static uint64_t dfd_base_addr;
+static uint64_t dfd_chain_length;
+
+void dfd_setup(uint64_t base_addr, uint64_t chain_length, uint64_t cache_dump)
+{
+	mmio_write_32(MTK_DRM_LATCH_CTL1, MTK_DRM_LATCH_CTL1_VAL);
+	mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_VAL);
+	mmio_write_32(MTK_WDT_LATCH_CTL2, MTK_WDT_LATCH_CTL2_VAL);
+
+	mmio_clrbits_32(DFD_O_INTRF_MCU_PWR_CTL_MASK, BIT(2));
+	mmio_setbits_32(DFD_V50_GROUP_0_63_DIFF, 0x1);
+	sync_writel(DFD_INTERNAL_CTL, 0x5);
+	mmio_setbits_32(DFD_INTERNAL_CTL, BIT(13));
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x1F << 3);
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 9);
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 19);
+
+	mmio_write_32(DFD_INTERNAL_PWR_ON, 0xB);
+	mmio_write_32(DFD_CHAIN_LENGTH0, chain_length);
+	mmio_write_32(DFD_INTERNAL_SHIFT_CLK_RATIO, 0x0);
+	mmio_write_32(DFD_INTERNAL_TEST_SO_OVER_64, 0x1);
+
+	mmio_write_32(DFD_TEST_SI_0, 0x0);
+	mmio_write_32(DFD_TEST_SI_1, 0x0);
+	mmio_write_32(DFD_TEST_SI_2, 0x0);
+	mmio_write_32(DFD_TEST_SI_3, 0x0);
+
+	sync_writel(DFD_POWER_CTL, 0xF9);
+	sync_writel(DFD_READ_ADDR, DFD_READ_ADDR_VAL);
+	sync_writel(DFD_V30_CTL, 0xD);
+
+	mmio_write_32(DFD_O_SET_BASEADDR_REG, base_addr >> 24);
+	mmio_write_32(DFD_O_REG_0, 0);
+
+	/* setup global variables for suspend and resume */
+	dfd_enabled = true;
+	dfd_base_addr = base_addr;
+	dfd_chain_length = chain_length;
+	dfd_cache_dump = cache_dump;
+
+	if ((cache_dump & DFD_CACHE_DUMP_ENABLE) != 0UL) {
+		mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_CACHE_VAL);
+		sync_writel(DFD_V35_ENABLE, 0x1);
+		sync_writel(DFD_V35_TAP_NUMBER, 0xB);
+		sync_writel(DFD_V35_TAP_EN, DFD_V35_TAP_EN_VAL);
+		sync_writel(DFD_V35_SEQ0_0, DFD_V35_SEQ0_0_VAL);
+
+		/* Cache dump only mode */
+		sync_writel(DFD_V35_CTL, 0x1);
+		mmio_write_32(DFD_INTERNAL_NUM_OF_TEST_SO_GROUP, 0xF);
+		mmio_write_32(DFD_CHAIN_LENGTH0, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH1, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH2, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH3, DFD_CHAIN_LENGTH_VAL);
+
+		if ((cache_dump & DFD_PARITY_ERR_TRIGGER) != 0UL) {
+			sync_writel(DFD_HW_TRIGGER_MASK, 0xC);
+			mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 4);
+		}
+	}
+	dsbsy();
+}
+
+void dfd_resume(void)
+{
+	if (dfd_enabled == true) {
+		dfd_setup(dfd_base_addr, dfd_chain_length, dfd_cache_dump);
+	}
+}
diff --git a/plat/mediatek/drivers/dfd/mt8188/plat_dfd.h b/plat/mediatek/drivers/dfd/mt8188/plat_dfd.h
new file mode 100644
index 0000000..5b98024
--- /dev/null
+++ b/plat/mediatek/drivers/dfd/mt8188/plat_dfd.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2022, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_DFD_H
+#define PLAT_DFD_H
+
+#include <lib/mmio.h>
+#include <platform_def.h>
+
+#define sync_writel(addr, val) do { mmio_write_32((addr), (val)); dsbsy(); } while (0)
+
+#define PLAT_MTK_DFD_SETUP_MAGIC		(0x99716150)
+#define PLAT_MTK_DFD_READ_MAGIC			(0x99716151)
+#define PLAT_MTK_DFD_WRITE_MAGIC		(0x99716152)
+
+#define MTK_DRM_LATCH_CTL1			(DRM_BASE + 0x40)
+#define MTK_DRM_LATCH_CTL2			(DRM_BASE + 0x44)
+
+#define MTK_WDT_BASE				(RGU_BASE)
+#define MTK_WDT_INTERVAL			(MTK_WDT_BASE + 0x10)
+#define MTK_WDT_LATCH_CTL2			(MTK_WDT_BASE + 0x48)
+
+#define MCU_BIU_BASE				(MCUCFG_BASE)
+#define MISC1_CFG_BASE				(MCU_BIU_BASE + 0xE040)
+#define DFD_INTERNAL_CTL			(MISC1_CFG_BASE + 0x00)
+#define DFD_INTERNAL_PWR_ON			(MISC1_CFG_BASE + 0x08)
+#define DFD_CHAIN_LENGTH0			(MISC1_CFG_BASE + 0x0C)
+#define DFD_INTERNAL_SHIFT_CLK_RATIO		(MISC1_CFG_BASE + 0x10)
+#define DFD_CHAIN_LENGTH1			(MISC1_CFG_BASE + 0x1C)
+#define DFD_CHAIN_LENGTH2			(MISC1_CFG_BASE + 0x20)
+#define DFD_CHAIN_LENGTH3			(MISC1_CFG_BASE + 0x24)
+#define DFD_INTERNAL_TEST_SO_0			(MISC1_CFG_BASE + 0x28)
+#define DFD_INTERNAL_NUM_OF_TEST_SO_GROUP	(MISC1_CFG_BASE + 0x30)
+#define DFD_INTERNAL_TEST_SO_OVER_64		(MISC1_CFG_BASE + 0x34)
+#define DFD_INTERNAL_SW_NS_TRIGGER		(MISC1_CFG_BASE + 0x3c)
+#define DFD_V30_CTL				(MISC1_CFG_BASE + 0x48)
+#define DFD_V30_BASE_ADDR			(MISC1_CFG_BASE + 0x4C)
+#define DFD_POWER_CTL				(MISC1_CFG_BASE + 0x50)
+#define DFD_TEST_SI_0				(MISC1_CFG_BASE + 0x58)
+#define DFD_TEST_SI_1				(MISC1_CFG_BASE + 0x5C)
+#define DFD_CLEAN_STATUS			(MISC1_CFG_BASE + 0x60)
+#define DFD_TEST_SI_2				(MISC1_CFG_BASE + 0x1D8)
+#define DFD_TEST_SI_3				(MISC1_CFG_BASE + 0x1DC)
+#define DFD_READ_ADDR				(MISC1_CFG_BASE + 0x1E8)
+#define DFD_HW_TRIGGER_MASK			(MISC1_CFG_BASE + 0xBC)
+
+#define DFD_V35_ENABLE				(MCU_BIU_BASE + 0xE0A8)
+#define DFD_V35_TAP_NUMBER			(MCU_BIU_BASE + 0xE0AC)
+#define DFD_V35_TAP_EN				(MCU_BIU_BASE + 0xE0B0)
+#define DFD_V35_CTL				(MCU_BIU_BASE + 0xE0B4)
+#define DFD_V35_SEQ0_0				(MCU_BIU_BASE + 0xE0C0)
+#define DFD_V35_SEQ0_1				(MCU_BIU_BASE + 0xE0C4)
+#define DFD_V50_GROUP_0_63_DIFF			(MCU_BIU_BASE + 0xE2AC)
+
+#define DFD_O_PROTECT_EN_REG			(0x10001220)
+#define DFD_O_INTRF_MCU_PWR_CTL_MASK		(0x10001A3C)
+#define DFD_O_SET_BASEADDR_REG			(0x10043000)
+#define DFD_O_REG_0				(0x10001390)
+
+#define DFD_CACHE_DUMP_ENABLE			(1U)
+#define DFD_PARITY_ERR_TRIGGER			(2U)
+
+#define DFD_V35_TAP_EN_VAL			(0x43FF)
+#define DFD_V35_SEQ0_0_VAL			(0x63668820)
+#define DFD_READ_ADDR_VAL			(0x40000008)
+#define DFD_CHAIN_LENGTH_VAL			(0xFFFFFFFF)
+
+#define MTK_WDT_LATCH_CTL2_VAL			(0x9507FFFF)
+#define MTK_WDT_INTERVAL_VAL			(0x6600000A)
+#define MTK_DRM_LATCH_CTL2_VAL			(0x950607D0)
+#define MTK_DRM_LATCH_CTL2_CACHE_VAL		(0x95065DC0)
+
+#define MTK_DRM_LATCH_CTL1_VAL			(0x95000013)
+
+#endif /* PLAT_DFD_H */