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spl: add serial download protocol (SDP) support 

Add USB serial download protocol support to SPL. If the SoC started
in recovery mode the SPL will immediately switch to SDP and wait for
further downloads/commands from the host side.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
This commit is contained in:
Stefan Agner 2017-08-16 11:00:54 -07:00 committed by Stefano Babic
parent 2f005695df
commit a3774c1c3c
4 changed files with 45 additions and 0 deletions
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6
common/spl/Kconfig
View File

@ -668,6 +668,12 @@ config SPL_DFU_RAM
endchoice
config SPL_USB_SDP_SUPPORT
bool "Support SDP (Serial Download Protocol)"
help
Enable Serial Download Protocol (SDP) device support in SPL. This
allows to download images into memory and execute (jump to) them
using the same protocol as implemented by the i.MX family's boot ROM.
endif
config SPL_WATCHDOG_SUPPORT

1
common/spl/Makefile
View File

@ -30,4 +30,5 @@ obj-$(CONFIG_$(SPL_TPL_)SATA_SUPPORT) += spl_sata.o
obj-$(CONFIG_$(SPL_TPL_)DFU_SUPPORT) += spl_dfu.o
obj-$(CONFIG_$(SPL_TPL_)SPI_LOAD) += spl_spi.o
obj-$(CONFIG_$(SPL_TPL_)RAM_SUPPORT) += spl_ram.o
obj-$(CONFIG_$(SPL_TPL_)USB_SDP_SUPPORT) += spl_sdp.o
endif

37
common/spl/spl_sdp.c Normal file
View File

@ -0,0 +1,37 @@
/*
* (C) Copyright 2016 Toradex
* Author: Stefan Agner <stefan.agner@toradex.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spl.h>
#include <usb.h>
#include <g_dnl.h>
#include <sdp.h>
DECLARE_GLOBAL_DATA_PTR;
static int spl_sdp_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
int ret;
const int controller_index = 0;
g_dnl_clear_detach();
g_dnl_register("usb_dnl_sdp");
ret = sdp_init(controller_index);
if (ret) {
error("SDP init failed: %d", ret);
return -ENODEV;
}
/* This command typically does not return but jumps to an image */
sdp_handle(controller_index);
error("SDP ended");
return -EINVAL;
}
SPL_LOAD_IMAGE_METHOD("USB SDP", 0, BOOT_DEVICE_BOARD, spl_sdp_load_image);

1
drivers/usb/gadget/Makefile
View File

@ -11,6 +11,7 @@ obj-$(CONFIG_USB_ETHER) += epautoconf.o config.o usbstring.o
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_USB_GADGET_SUPPORT) += g_dnl.o
obj-$(CONFIG_SPL_DFU_SUPPORT) += f_dfu.o
obj-$(CONFIG_SPL_USB_SDP_SUPPORT) += f_sdp.o
endif
# new USB gadget layer dependencies