xilinx: versal: Add support for saving env based on bootmode

Enable saving variables to MMC(FAT) and SPI based on primary
bootmode. If bootmode is JTAG, dont save env anywhere(NOWHERE).

Enable ENV_FAT_DEVICE_AND_PART="0:auto" for Versal platforms as well.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/versal/board.c

@@ -9,6 +9,7 @@
 #include <env.h>
 #include <fdtdec.h>
 #include <init.h>
+#include <env_internal.h>
 #include <log.h>
 #include <malloc.h>
 #include <time.h>
@@ -245,3 +246,32 @@ int dram_init(void)
 void reset_cpu(void)
 {
 }
+
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+	u32 bootmode = versal_get_bootmode();
+
+	if (prio)
+		return ENVL_UNKNOWN;
+
+	switch (bootmode) {
+	case EMMC_MODE:
+	case SD_MODE:
+	case SD1_LSHFT_MODE:
+	case SD_MODE1:
+		if (IS_ENABLED(CONFIG_ENV_IS_IN_FAT))
+			return ENVL_FAT;
+		if (IS_ENABLED(CONFIG_ENV_IS_IN_EXT4))
+			return ENVL_EXT4;
+		return ENVL_UNKNOWN;
+	case OSPI_MODE:
+	case QSPI_MODE_24BIT:
+	case QSPI_MODE_32BIT:
+		if (IS_ENABLED(CONFIG_ENV_IS_IN_SPI_FLASH))
+			return ENVL_SPI_FLASH;
+		return ENVL_UNKNOWN;
+	case JTAG_MODE:
+	default:
+		return ENVL_NOWHERE;
+	}
+}

configs/xilinx_versal_virt_defconfig

@@ -39,6 +39,9 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_CMD_UBI=y
 CONFIG_OF_BOARD=y
+CONFIG_ENV_IS_NOWHERE=y
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_NETCONSOLE=y

env/Kconfig

@@ -445,7 +445,7 @@ config ENV_FAT_DEVICE_AND_PART
 	string "Device and partition for where to store the environemt in FAT"
 	depends on ENV_IS_IN_FAT
 	default "0:1" if TI_COMMON_CMD_OPTIONS
-	default "0:auto" if ARCH_ZYNQ || ARCH_ZYNQMP
+	default "0:auto" if ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_VERSAL
 	default "0:auto" if ARCH_SUNXI && MMC_SUNXI_SLOT_EXTRA = -1
 	default "1:auto" if ARCH_SUNXI && MMC_SUNXI_SLOT_EXTRA != -1
 	default "0" if ARCH_AT91