From d59406482c1847959305a986376b35e57da28e69 Mon Sep 17 00:00:00 2001 From: Andre Heider Date: Sat, 5 Sep 2020 12:45:59 +0200 Subject: [PATCH] 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. Tested on a v5 board without eMMC. Signed-off-by: Andre Heider --- board/Marvell/mvebu_armada-37xx/board.c | 47 +++++++++++++++++++++ configs/mvebu_espressobin-88f3720_defconfig | 1 + 2 files changed, 48 insertions(+) --- a/board/Marvell/mvebu_armada-37xx/board.c +++ b/board/Marvell/mvebu_armada-37xx/board.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -50,6 +51,22 @@ DECLARE_GLOBAL_DATA_PTR; #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; @@ -63,6 +80,36 @@ int board_init(void) 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) { --- a/configs/mvebu_espressobin-88f3720_defconfig +++ b/configs/mvebu_espressobin-88f3720_defconfig @@ -84,3 +84,4 @@ CONFIG_USB_ETHER_RTL8152=y CONFIG_USB_ETHER_SMSC95XX=y CONFIG_SHA1=y CONFIG_SHA256=y +CONFIG_BOARD_LATE_INIT=y