[PATCH v1 09/22] arm: socfpga: Add handoff data support for Diamond Mesa

[Siew Chin Lim]

Diamond Mesa support both HPS handoff data and DDR handoff data.
HPS handoff data support re-use Straix10 and Agilex code. DDR
handoff data is newly introduced in Diamond Mesa.

Signed-off-by: Siew Chin Lim <elly.siew.chin.lim at intel.com>
---
 arch/arm/mach-socfpga/include/mach/handoff_soc64.h | 19 ++++++++++
 arch/arm/mach-socfpga/wrap_handoff_soc64.c         | 40 ++++++++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/arch/arm/mach-socfpga/include/mach/handoff_soc64.h b/arch/arm/mach-socfpga/include/mach/handoff_soc64.h
index 68e0278384..c38b232065 100644
--- a/arch/arm/mach-socfpga/include/mach/handoff_soc64.h
+++ b/arch/arm/mach-socfpga/include/mach/handoff_soc64.h
@@ -23,8 +23,27 @@
 #define SOC64_HANDOFF_OFFSET_DATA		0x10
 #define SOC64_HANDOFF_SIZE			4096
 
+#if defined(CONFIG_TARGET_SOCFPGA_STRATIX10) || \
+	defined(CONFIG_TARGET_SOCFPGA_AGILEX)
 #define SOC64_HANDOFF_BASE			0xFFE3F000
 #define SOC64_HANDOFF_MISC			(SOC64_HANDOFF_BASE + 0x610)
+#elif defined(CONFIG_TARGET_SOCFPGA_DM)
+#define SOC64_HANDOFF_BASE			0xFFE5F000
+#define SOC64_HANDOFF_MISC			(SOC64_HANDOFF_BASE + 0x630)
+
+/* DDR handoff */
+#define SOC64_HANDOFF_DDR_BASE			0xFFE5C000
+
+#define SOC64_HANDOFF_DDR_MAGIC			0x48524444
+#define SOC64_HANDOFF_DDR_UMCTL2_MAGIC		0x4C54434D
+#define SOC64_HANDOFF_DDR_MEMRESET_BASE		(SOC64_HANDOFF_DDR_BASE + 0xC)
+#define SOC64_HANDOFF_DDR_UMCTL2_SECTION	(SOC64_HANDOFF_DDR_BASE + 0x10)
+#define SOC64_HANDOFF_DDR_UMCTL2_BASE		(SOC64_HANDOFF_DDR_BASE + 0x1C)
+#define SOC64_HANDOFF_DDR_PHY_MAGIC		0x43594850
+#define SOC64_HANDOFF_DDR_PHY_INIT_ENGINE_MAGIC	0x45594850
+#define SOC64_HANDOFF_DDR_PHY_BASE_OFFSET	0x8
+#endif
+
 #define SOC64_HANDOFF_MUX			(SOC64_HANDOFF_BASE + 0x10)
 #define SOC64_HANDOFF_IOCTL			(SOC64_HANDOFF_BASE + 0x1A0)
 #define SOC64_HANDOFF_FPGA			(SOC64_HANDOFF_BASE + 0x330)
diff --git a/arch/arm/mach-socfpga/wrap_handoff_soc64.c b/arch/arm/mach-socfpga/wrap_handoff_soc64.c
index 672bdd5230..aea384897e 100644
--- a/arch/arm/mach-socfpga/wrap_handoff_soc64.c
+++ b/arch/arm/mach-socfpga/wrap_handoff_soc64.c
@@ -67,6 +67,46 @@ int socfpga_handoff_read(void *handoff_address, void *table, u32 table_len,
 			debug("at addr  0x%p\n", (u32 *)handoff_address);
 			return -EPERM;
 		}
+	} else {
+#ifdef CONFIG_TARGET_SOCFPGA_DM
+		temp = readl(handoff_address);
+		if (temp == SOC64_HANDOFF_DDR_UMCTL2_MAGIC) {
+			debug("%s: umctl2 handoff data =\n{\n",
+			      __func__);
+		} else if (temp == SOC64_HANDOFF_DDR_PHY_MAGIC) {
+			debug("%s: PHY handoff data =\n{\n",
+			      __func__);
+		} else if (temp == SOC64_HANDOFF_DDR_PHY_INIT_ENGINE_MAGIC) {
+			debug("%s: PHY engine handoff data =\n{\n",
+			      __func__);
+		}
+
+		debug("handoff table address = 0x%p table length = 0x%x\n",
+		      table_x32, table_len);
+
+		if (temp == SOC64_HANDOFF_DDR_UMCTL2_MAGIC ||
+		    temp == SOC64_HANDOFF_DDR_PHY_MAGIC ||
+		    temp == SOC64_HANDOFF_DDR_PHY_INIT_ENGINE_MAGIC) {
+			/* Using handoff from Quartus tools if exists */
+			for (i = 0; i < table_len; i++) {
+				*table_x32 = readl(handoff_address +
+						SOC64_HANDOFF_OFFSET_DATA + (i * 4));
+
+				if (!(i % 2))
+					debug(" No.%d Addr 0x%08x: ", i,
+					      *table_x32);
+				else
+					debug(" 0x%08x\n", *table_x32);
+
+				table_x32++;
+			}
+			debug("\n}\n");
+		} else {
+			debug("%s: Cannot find HANDOFF MAGIC ", __func__);
+			debug("at addr 0x%p\n", (u32 *)handoff_address);
+			return -EPERM;
+		}
+#endif
 	}
 
 	return 0;
-- 
2.13.0