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diff --git a/doc/README.dfu b/doc/README.dfu new file mode 100644 index 0000000..f5344e2 --- /dev/null +++ b/doc/README.dfu @@ -0,0 +1,144 @@ +# SPDX-License-Identifier: GPL-2.0+ + +Device Firmware Upgrade (DFU) + +Overview: + + The Device Firmware Upgrade (DFU) allows to download and upload firmware + to/from U-Boot connected over USB. + + U-boot follows the Universal Serial Bus Device Class Specification for + Device Firmware Upgrade Version 1.1 the USB forum (DFU v1.1 in www.usb.org). + + U-Boot implements this DFU capability (CONFIG_DFU) with the command dfu + (cmd/dfu.c / CONFIG_CMD_DFU) based on: + - the DFU stack (common/dfu.c and common/spl/spl_dfu.c), based on the + USB DFU download gadget (drivers/usb/gadget/f_dfu.c) + - The access to mediums is done in DFU backends (driver/dfu) + + Today the supported DFU backends are: + - MMC (RAW or FAT / EXT2 / EXT3 / EXT4 file system) + - NAND + - RAM + - SF (serial flash) + + These DFU backends are also used by + - the dfutftp (see README.dfutftp) + - the thordown command (cmd/thordown.c and gadget/f_thor.c) + +Configuration Options: + CONFIG_DFU + CONFIG_DFU_OVER_USB + CONFIG_DFU_MMC + CONFIG_DFU_NAND + CONFIG_DFU_RAM + CONFIG_DFU_SF + CONFIG_CMD_DFU + +Environment variables: + the dfu command use 3 environments variables: + "dfu_alt_info" : the DFU setting for the USB download gadget with a comma + separated string of information on each alternate: + dfu_alt_info="<alt1>;<alt2>;....;<altN>" + + "dfu_bufsiz" : size of the DFU buffer, when absent, use + CONFIG_SYS_DFU_DATA_BUF_SIZE (8MiB by default) + + "dfu_hash_algo" : name of the hash algorithm to use + +Commands: + dfu <USB_controller> <interface> <dev> list + list the alternate device defined in "dfu_alt_info" + + dfu <USB_controller> <interface> <dev> + start the dfu stack on the USB instance with the selected medium + backend and use the "dfu_alt_info" variable to configure the + alternate setting and link each one with the medium + The dfu command continue until receive a ^C in console or + a DFU detach transaction from HOST. + + The possible values of <interface> are : + (with <USB controller> = 0 in the dfu command example) + + "mmc" (for eMMC and SD card) + cmd: dfu 0 mmc <dev> + each element in "dfu_alt_info" = + <name> raw <offset> <size> raw access to mmc device + <name> part <dev> <part_id> raw acces to partition + <name> fat <dev> <part_id> file in FAT partition + <name> ext4 <dev> <part_id> file in EXT4 partition + + with <partid> is the GPT or DOS partition index + + "nand" (raw slc nand device) + cmd: dfu 0 nand <dev> + each element in "dfu_alt_info" = + <name> raw <offset> <size> raw access to mmc device + <name> part <dev> <part_id> raw acces to partition + <name> partubi <dev> <part_id> raw acces to ubi partition + + with <partid> is the MTD partition index + + "ram" + cmd: dfu 0 ram <dev> + (<dev> is not used for RAM target) + each element in "dfu_alt_info" = + <name> ram <offset> <size> raw access to ram + + "sf" (serial flash : NOR) + cmd: dfu 0 sf <dev> + each element in "dfu_alt_info" = + <name> ram <offset> <size> raw access to sf device + +Host tools: + When U-Boot runs the dfu stack, the DFU host tools can be used + to send/receive firmwares on each configurated alternate. + + For example dfu-util is a host side implementation of the DFU 1.1 + specifications(http://dfu-util.sourceforge.net/) which works with U-Boot. + +Usage: + Example for firmware located in eMMC or SD card, with: + - alternate 1 (alt=1) for SPL partition (GPT partition 1) + - alternate 2 (alt=2) for U-Boot partition (GPT partition 2) + + The U-Boot configuration is: + + U-Boot> env set dfu_alt_info "spl part 0 1;u-boot part 0 2" + + U-Boot> dfu 0 mmc 0 list + DFU alt settings list: + dev: eMMC alt: 0 name: spl layout: RAW_ADDR + dev: eMMC alt: 1 name: u-boot layout: RAW_ADDR + + Boot> dfu 0 mmc 0 + + On the Host side: + + list the available alternate setting: + + $> dfu-util -l + dfu-util 0.9 + + Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. + Copyright 2010-2016 Tormod Volden and Stefan Schmidt + This program is Free Software and has ABSOLUTELY NO WARRANTY + Please report bugs to http://sourceforge.net/p/dfu-util/tickets/ + + Found DFU: [0483:5720] ver=0200, devnum=45, cfg=1, intf=0, path="3-1.3.1", \ + alt=1, name="u-boot", serial="003A00203438510D36383238" + Found DFU: [0483:5720] ver=0200, devnum=45, cfg=1, intf=0, path="3-1.3.1", \ + alt=0, name="spl", serial="003A00203438510D36383238" + + To download to U-Boot, use -D option + + $> dfu-util -a 0 -D u-boot-spl.bin + $> dfu-util -a 1 -D u-boot.bin + + To upload from U-Boot, use -U option + + $> dfu-util -a 0 -U u-boot-spl.bin + $> dfu-util -a 1 -U u-boot.bin + + To request a DFU detach and reset the USB connection: + $> dfu-util -a 0 -e -R |