arm64: versal: Define board_late_init for versal

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

Also disable it for mini platforms because simply there is no need to have
it enabled.
But also disable it for virtual platform because Qemu is not modelling this
register space that's why travis testing would fail. This configuration
should be reverted when mainline Qemu is updated.

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

arch/arm/Kconfig

@@ -980,6 +980,7 @@ 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_defconfig

@@ -10,6 +10,7 @@ CONFIG_SYS_MEM_RSVD_FOR_MMU=y
 CONFIG_COUNTER_FREQUENCY=2720000
 # CONFIG_LEGACY_IMAGE_FORMAT 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_emmc0_defconfig

@@ -8,6 +8,7 @@ CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_MALLOC_LEN=0x80000
 CONFIG_COUNTER_FREQUENCY=2720000
 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

@@ -8,6 +8,7 @@ CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_MALLOC_LEN=0x80000
 CONFIG_COUNTER_FREQUENCY=2720000
 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_virt_defconfig

@@ -12,6 +12,7 @@ CONFIG_FIT_VERBOSE=y
 # CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
 CONFIG_BOOTDELAY=-1
 CONFIG_SUPPORT_RAW_INITRD=y
+# CONFIG_BOARD_LATE_INIT is not set
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_BOARD_EARLY_INIT_R=y
 CONFIG_HUSH_PARSER=y