arm64: versal: Define board_late_init for versal

Define board_late_init which performs bootmode detection
and prepares corresponding distro boot commaand sequence.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/Kconfig

@@ -890,6 +890,7 @@ config ARCH_VERSAL
 	select DM_MMC if MMC
 	select DM_SERIAL
 	select OF_CONTROL
+	imply BOARD_LATE_INIT
 
 config ARCH_VF610
 	bool "Freescale Vybrid"

arch/arm/mach-versal/include/mach/hardware.h

@@ -51,3 +51,26 @@ struct rpu_regs {
 };
 
 #define rpu_base ((struct rpu_regs *)VERSAL_RPU_BASEADDR)
+
+#define VERSAL_CRP_BASEADDR	0xF1260000
+
+struct crp_regs {
+	u32 reserved0[128];
+	u32 boot_mode_usr;
+};
+
+#define crp_base ((struct crp_regs *)VERSAL_CRP_BASEADDR)
+
+/* Bootmode setting values */
+#define BOOT_MODES_MASK	0x0000000F
+#define QSPI_MODE_24BIT	0x00000001
+#define QSPI_MODE_32BIT	0x00000002
+#define SD_MODE		0x00000003 /* sd 0 */
+#define SD_MODE1	0x00000005 /* sd 1 */
+#define EMMC_MODE	0x00000006
+#define USB_MODE	0x00000007
+#define OSPI_MODE	0x00000008
+#define SD1_LSHFT_MODE	0x0000000E /* SD1 Level shifter */
+#define JTAG_MODE	0x00000000
+#define BOOT_MODE_USE_ALT	0x100
+#define BOOT_MODE_ALT_SHIFT	12

board/xilinx/versal/board.c

@@ -9,6 +9,8 @@
 #include <malloc.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -65,6 +67,115 @@ int board_early_init_r(void)
 	return 0;
 }
 
+int board_late_init(void)
+{
+	u32 reg = 0;
+	u8 bootmode;
+	struct udevice *dev;
+	int bootseq = -1;
+	int bootseq_len = 0;
+	int env_targets_len = 0;
+	const char *mode;
+	char *new_targets;
+	char *env_targets;
+
+	if (!(gd->flags & GD_FLG_ENV_DEFAULT)) {
+		debug("Saved variables - Skipping\n");
+		return 0;
+	}
+
+	reg = readl(&crp_base->boot_mode_usr);
+
+	if (reg >> BOOT_MODE_ALT_SHIFT)
+		reg >>= BOOT_MODE_ALT_SHIFT;
+
+	bootmode = reg & BOOT_MODES_MASK;
+
+	puts("Bootmode: ");
+	switch (bootmode) {
+	case JTAG_MODE:
+		puts("JTAG_MODE\n");
+		mode = "pxe dhcp";
+		break;
+	case QSPI_MODE_24BIT:
+		puts("QSPI_MODE_24\n");
+		mode = "xspi0";
+		break;
+	case QSPI_MODE_32BIT:
+		puts("QSPI_MODE_32\n");
+		mode = "xspi0";
+		break;
+	case OSPI_MODE:
+		puts("OSPI_MODE\n");
+		mode = "xspi0";
+		break;
+	case EMMC_MODE:
+		puts("EMMC_MODE\n");
+		mode = "mmc0";
+		break;
+	case SD_MODE:
+		puts("SD_MODE\n");
+		if (uclass_get_device_by_name(UCLASS_MMC,
+					      "sdhci@f1040000", &dev)) {
+			puts("Boot from SD0 but without SD0 enabled!\n");
+			return -1;
+		}
+		debug("mmc0 device found at %p, seq %d\n", dev, dev->seq);
+
+		mode = "mmc";
+		bootseq = dev->seq;
+		break;
+	case SD1_LSHFT_MODE:
+		puts("LVL_SHFT_");
+		/* fall through */
+	case SD_MODE1:
+		puts("SD_MODE1\n");
+		if (uclass_get_device_by_name(UCLASS_MMC,
+					      "sdhci@f1050000", &dev)) {
+			puts("Boot from SD1 but without SD1 enabled!\n");
+			return -1;
+		}
+		debug("mmc1 device found at %p, seq %d\n", dev, dev->seq);
+
+		mode = "mmc";
+		bootseq = dev->seq;
+		break;
+	default:
+		mode = "";
+		printf("Invalid Boot Mode:0x%x\n", bootmode);
+		break;
+	}
+
+	if (bootseq >= 0) {
+		bootseq_len = snprintf(NULL, 0, "%i", bootseq);
+		debug("Bootseq len: %x\n", bootseq_len);
+	}
+
+	/*
+	 * One terminating char + one byte for space between mode
+	 * and default boot_targets
+	 */
+	env_targets = env_get("boot_targets");
+	if (env_targets)
+		env_targets_len = strlen(env_targets);
+
+	new_targets = calloc(1, strlen(mode) + env_targets_len + 2 +
+			     bootseq_len);
+	if (!new_targets)
+		return -ENOMEM;
+
+	if (bootseq >= 0)
+		sprintf(new_targets, "%s%x %s", mode, bootseq,
+			env_targets ? env_targets : "");
+	else
+		sprintf(new_targets, "%s %s", mode,
+			env_targets ? env_targets : "");
+
+	env_set("boot_targets", new_targets);
+
+	return 0;
+}
+
 int dram_init_banksize(void)
 {
 	fdtdec_setup_memory_banksize();

configs/xilinx_versal_mini_emmc0_defconfig

@@ -7,6 +7,7 @@ CONFIG_SYS_MALLOC_LEN=0x80000
 CONFIG_COUNTER_FREQUENCY=2720000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_BOARD_LATE_INIT is not set
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y
 # CONFIG_CMDLINE_EDITING is not set

configs/xilinx_versal_mini_emmc1_defconfig

@@ -7,6 +7,7 @@ CONFIG_SYS_MALLOC_LEN=0x80000
 CONFIG_COUNTER_FREQUENCY=2720000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_BOARD_LATE_INIT is not set
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y
 # CONFIG_CMDLINE_EDITING is not set

configs/xilinx_versal_mini_ospi_defconfig

@@ -9,6 +9,7 @@ CONFIG_COUNTER_FREQUENCY=2720000
 CONFIG_NR_DRAM_BANKS=1
 # CONFIG_IMAGE_FORMAT_LEGACY is not set
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_BOARD_LATE_INIT is not set
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y
 # CONFIG_CMDLINE_EDITING is not set

configs/xilinx_versal_mini_qspi_defconfig

@@ -9,6 +9,7 @@ CONFIG_COUNTER_FREQUENCY=2720000
 CONFIG_NR_DRAM_BANKS=1
 # CONFIG_IMAGE_FORMAT_LEGACY is not set
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_BOARD_LATE_INIT is not set
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y
 # CONFIG_CMDLINE_EDITING is not set