SPDX: Convert all of our single license tags to Linux Kernel style

[platform/kernel/u-boot.git] / arch / arm / mach-imx / spl.c

diff --git a/arch/arm/mach-imx/spl.c b/arch/arm/mach-imx/spl.c
index b2521b2..a20b30d 100644 (file)
--- a/arch/arm/mach-imx/spl.c
+++ b/arch/arm/mach-imx/spl.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014 Gateworks Corporation
  * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
  *
  * Author: Tim Harvey <tharvey@gateworks.com>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
@@ -101,6 +100,29 @@ u32 spl_boot_device(void)
 /* Translate iMX7/MX8M boot device to the SPL boot device enumeration */
 u32 spl_boot_device(void)
 {
+#if defined(CONFIG_MX7)
+       unsigned int bmode = readl(&src_base->sbmr2);
+
+       /*
+        * Check for BMODE if serial downloader is enabled
+        * BOOT_MODE - see IMX7DRM Table 6-24
+        */
+       if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
+               return BOOT_DEVICE_BOARD;
+
+       /*
+        * The above method does not detect that the boot ROM used
+        * serial downloader in case the boot ROM decided to use the
+        * serial downloader as a fall back (primary boot source failed).
+        *
+        * Infer that the boot ROM used the USB serial downloader by
+        * checking whether the USB PHY is currently active... This
+        * assumes that SPL did not (yet) initialize the USB PHY...
+        */
+       if (is_boot_from_usb())
+               return BOOT_DEVICE_BOARD;
+#endif
+
        enum boot_device boot_device_spl = get_boot_device();
 
        switch (boot_device_spl) {