[U-Boot] [PATCH 2/2] arm: K3: am654: Add support for getting boot mode

[Andrew F. Davis]

Read the boot mode register to find the boot mode. Only use eMMC boot0
mode when the mode is eMMC boot (called BOOT_DEVICE_MMC1 currently due
to current conflating of boot mode and boot device), and not iff the
boot device is MMC port 0.

Signed-off-by: Andrew F. Davis <afd at ti.com>
---
 arch/arm/mach-k3/am6_init.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/mach-k3/am6_init.c b/arch/arm/mach-k3/am6_init.c
index b2388b98ec..68f0b8c011 100644
--- a/arch/arm/mach-k3/am6_init.c
+++ b/arch/arm/mach-k3/am6_init.c
@@ -72,6 +72,29 @@ void board_init_f(ulong dummy)
 	preloader_console_init();
 }
 
+u32 spl_boot_mode(const u32 boot_device)
+{
+#if defined(CONFIG_SUPPORT_EMMC_BOOT)
+	u32 devstat = readl(CTRLMMR_MAIN_DEVSTAT);
+	u32 bootindex = readl(K3_BOOT_PARAM_TABLE_INDEX_VAL);
+
+	u32 bootmode = (devstat & CTRLMMR_MAIN_DEVSTAT_BOOTMODE_MASK) >>
+			CTRLMMR_MAIN_DEVSTAT_BOOTMODE_SHIFT;
+
+	/* eMMC boot0 mode is only supported for primary boot */
+	if (bootindex == K3_PRIMARY_BOOTMODE &&
+	    bootmode == BOOT_DEVICE_MMC1)
+		return MMCSD_MODE_EMMCBOOT;
+#endif
+
+	/* Everything else use filesystem if available */
+#if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
+	return MMCSD_MODE_FS;
+#else
+	return MMCSD_MODE_RAW;
+#endif
+}
+
 static u32 __get_backup_bootmedia(u32 devstat)
 {
 	u32 bkup_boot = (devstat & CTRLMMR_MAIN_DEVSTAT_BKUP_BOOTMODE_MASK) >>
-- 
2.18.0