[U-Boot] [PATCH v2 21/23] apalis_imx6: use SDP if USB serial downloader has been used

[Marcel Ziswiler]

From: Stefan Agner <stefan.agner at toradex.com>

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 <stefan.agner at toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>

---

Changes in v2: None

 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 2c90a40042..ce54638c4c 100644
--- a/board/toradex/apalis_imx6/apalis_imx6.c
+++ b/board/toradex/apalis_imx6/apalis_imx6.c
@@ -714,6 +714,14 @@ 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