arm: mvebu: Espressobin: Set environment variable fdtfile
Required for the generic distro mechanism.
Linux ships with 4 variants:
marvell/armada-3720-espressobin-v7-emmc.dtb
marvell/armada-3720-espressobin-v7.dtb
marvell/armada-3720-espressobin-emmc.dtb
marvell/armada-3720-espressobin.dtb
Use available information to determine the appropriate filename.
Fixes booting GRUB EFI arm64 on Fedora.
Reported-by: Dennis Gilmore <dennis@ausil.us>
Signed-off-by: Andre Heider <a.heider@gmail.com>
diff --git a/board/Marvell/mvebu_armada-37xx/board.c b/board/Marvell/mvebu_armada-37xx/board.c
index 7b9c322..eacee15 100644
--- a/board/Marvell/mvebu_armada-37xx/board.c
+++ b/board/Marvell/mvebu_armada-37xx/board.c
@@ -5,6 +5,7 @@
#include <common.h>
#include <dm.h>
+#include <env.h>
#include <i2c.h>
#include <init.h>
#include <phy.h>
@@ -50,6 +51,22 @@
#define MVEBU_G2_SMI_PHY_CMD_REG (24)
#define MVEBU_G2_SMI_PHY_DATA_REG (25)
+/*
+ * Memory Controller Registers
+ *
+ * Assembled based on public information:
+ * https://gitlab.nic.cz/turris/mox-boot-builder/-/blob/master/wtmi/main.c#L332-336
+ * https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-18.12/drivers/mv_ddr_mc6.h#L309-L332
+ *
+ * And checked against the written register values for the various topologies:
+ * https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-atf-mainline/a3700/mv_ddr_tim.h
+ */
+#define A3700_CH0_MC_CTRL2_REG MVEBU_REGISTER(0x002c4)
+#define A3700_MC_CTRL2_SDRAM_TYPE_MASK 0xf
+#define A3700_MC_CTRL2_SDRAM_TYPE_OFFS 4
+#define A3700_MC_CTRL2_SDRAM_TYPE_DDR3 2
+#define A3700_MC_CTRL2_SDRAM_TYPE_DDR4 3
+
int board_early_init_f(void)
{
return 0;
@@ -62,6 +79,36 @@
return 0;
}
+
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+ bool ddr4, emmc;
+
+ if (env_get("fdtfile"))
+ return 0;
+
+ if (!of_machine_is_compatible("globalscale,espressobin"))
+ return 0;
+
+ /* If the memory controller has been configured for DDR4, we're running on v7 */
+ ddr4 = ((readl(A3700_CH0_MC_CTRL2_REG) >> A3700_MC_CTRL2_SDRAM_TYPE_OFFS)
+ & A3700_MC_CTRL2_SDRAM_TYPE_MASK) == A3700_MC_CTRL2_SDRAM_TYPE_DDR4;
+
+ emmc = of_machine_is_compatible("globalscale,espressobin-emmc");
+
+ if (ddr4 && emmc)
+ env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");
+ else if (ddr4)
+ env_set("fdtfile", "marvell/armada-3720-espressobin-v7.dtb");
+ else if (emmc)
+ env_set("fdtfile", "marvell/armada-3720-espressobin-emmc.dtb");
+ else
+ env_set("fdtfile", "marvell/armada-3720-espressobin.dtb");
+
+ return 0;
+}
+#endif
/* Board specific AHCI / SATA enable code */
int board_ahci_enable(void)
diff --git a/configs/mvebu_espressobin-88f3720_defconfig b/configs/mvebu_espressobin-88f3720_defconfig
index 5e9fcd1..559aeb0 100644
--- a/configs/mvebu_espressobin-88f3720_defconfig
+++ b/configs/mvebu_espressobin-88f3720_defconfig
@@ -85,3 +85,4 @@
CONFIG_SHA1=y
CONFIG_SHA256=y
CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_BOARD_LATE_INIT=y