From: Stefan Agner <[email protected]>

In case USB serial downloader has been used to load U-Boot start the
serial download protocol (SDP) emulation. This allows to download
complete images such as Toradex Easy Installer over USB SDP as well.
This code uses the boot ROM provided boot information to reliably
detect USB serial downloader.

Signed-off-by: Stefan Agner <[email protected]>
Acked-by: Marcel Ziswiler <[email protected]>

---

 board/toradex/apalis_imx6/apalis_imx6.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/board/toradex/apalis_imx6/apalis_imx6.c 
b/board/toradex/apalis_imx6/apalis_imx6.c
index 696994a6b6..542b1ebafe 100644
--- a/board/toradex/apalis_imx6/apalis_imx6.c
+++ b/board/toradex/apalis_imx6/apalis_imx6.c
@@ -705,6 +705,14 @@ int board_late_init(void)
 #endif /* CONFIG_TDX_APALIS_IMX6_V1_0 */
 #endif /* CONFIG_REVISION_TAG */
 
+#ifdef CONFIG_CMD_USB_SDP
+       if (is_boot_from_usb()) {
+               printf("Serial Downloader recovery mode, using sdp command\n");
+               env_set("bootdelay", "0");
+               env_set("bootcmd", "sdp 0");
+       }
+#endif /* CONFIG_CMD_USB_SDP */
+
        return 0;
 }
 #endif /* CONFIG_BOARD_LATE_INIT */
-- 
2.20.1

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