arm: mach-k3: am6_init: Add support for USB boot mode

Add support for identifying USB host and device boot modes

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>

arch/arm/mach-k3/am6_init.c

@@ -333,6 +333,11 @@ static u32 __get_primary_bootmedia(u32 devstat)
 			    CTRLMMR_MAIN_DEVSTAT_EMMC_PORT_SHIFT;
 		if (port == 0x1)
 			bootmode = BOOT_DEVICE_MMC2;
+	} else if (bootmode == BOOT_DEVICE_DFU) {
+		u32 mode = (devstat & CTRLMMR_MAIN_DEVSTAT_USB_MODE_MASK) >>
+			    CTRLMMR_MAIN_DEVSTAT_USB_MODE_SHIFT;
+		if (mode == 0x2)
+			bootmode = BOOT_DEVICE_USB;
 	}
 
 	return bootmode;

arch/arm/mach-k3/include/mach/am6_hardware.h

@@ -25,6 +25,8 @@
 #define CTRLMMR_MAIN_DEVSTAT_EMMC_PORT_SHIFT		14
 #define CTRLMMR_MAIN_DEVSTAT_BKUP_MMC_PORT_MASK		GENMASK(17, 17)
 #define CTRLMMR_MAIN_DEVSTAT_BKUP_MMC_PORT_SHIFT	12
+#define CTRLMMR_MAIN_DEVSTAT_USB_MODE_SHIFT		9
+#define CTRLMMR_MAIN_DEVSTAT_USB_MODE_MASK		GENMASK(10, 9)
 
 #define WKUP_CTRL_MMR0_BASE				0x43000000
 #define MCU_CTRL_MMR0_BASE				0x40f00000

arch/arm/mach-k3/include/mach/am6_spl.h

@@ -14,7 +14,8 @@
 #define BOOT_DEVICE_I2C			0x05
 #define BOOT_DEVICE_MMC2		0x06
 #define BOOT_DEVICE_ETHERNET		0x07
-#define BOOT_DEVICE_USB			0x08
+#define BOOT_DEVICE_DFU			0x08
+#define BOOT_DEVICE_USB			0x408
 #define BOOT_DEVICE_PCIE		0x09
 #define BOOT_DEVICE_UART		0x0a
 #define BOOT_DEVICE_NAND		0x0c