On both i.MX6 and i.MX7 (also true for VFxxx) there's an additional
path that leads mask ROM to switch into serial bootloader mode. Add
code to support it.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
arch/arm/mach-imx/boot.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index dc385ceae..7c59c2181 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -228,6 +228,8 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
#define IMX6_SRC_SBMR2 0x1c
#define IMX6_BMOD_SERIAL 0b01
#define IMX6_BMOD_RESERVED 0b11
+#define IMX6_BMOD_FUSES 0b00
+#define BT_FUSE_SEL BIT(4)
static bool imx6_bootsource_reserved(uint32_t sbmr2)
{
@@ -236,7 +238,14 @@ static bool imx6_bootsource_reserved(uint32_t sbmr2)
static bool imx6_bootsource_serial(uint32_t sbmr2)
{
- return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL;
+ return imx53_get_bmod(sbmr2) == IMX6_BMOD_SERIAL ||
+ /*
+ * If boot from fuses is selected and fuses are not
+ * programmed by setting BT_FUSE_SEL, ROM code will
+ * fallback to serial mode
+ */
+ (imx53_get_bmod(sbmr2) == IMX6_BMOD_FUSES &&
+ !(sbmr2 & BT_FUSE_SEL));
}
void imx6_get_boot_source(enum bootsource *src, int *instance)
--
2.14.3
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