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u-boot/doc/README.dfu
Andy Shevchenko 98a8f445fd dfu: Add optional timeout parameter 
When the `dfu` command is called from the U-Boot environment,
it now accepts an optional parameter that specifies a timeout (in seconds).
If a DFU connection is not made within that time the `dfu` command exits
(as it would if Ctrl+C was pressed). If the timeout is left empty or being
zero the `dfu` command behaves as it does now.

This is useful for allowing U-Boot to check to see if anything wants to
upload new firmware before continuing to boot.

The patch is based on the commit
5e966ccc3c
by Sebastien Colleur, which has been heavily reworked due to U-Boot changes
in the past.

Signed-off-by: Brad Campbell <bradjc5@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-01-07 14:37:50 +01:00

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# 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)
- MTD (all MTD device: NAND, SPI-NOR, SPI-NAND,...)
- virtual
These DFU backends are also used by
- the dfutftp (see README.dfutftp)
- the thordown command (cmd/thordown.c and gadget/f_thor.c)
The "virtual" backend is a generic DFU backend to support a board specific
target (for example OTP), only based on the weak functions:
- dfu_write_medium_virt
- dfu_get_medium_size_virt
- dfu_read_medium_virt
Configuration Options:
CONFIG_DFU
CONFIG_DFU_OVER_USB
CONFIG_DFU_MMC
CONFIG_DFU_MTD
CONFIG_DFU_NAND
CONFIG_DFU_RAM
CONFIG_DFU_SF
CONFIG_DFU_SF_PART
CONFIG_DFU_TIMEOUT
CONFIG_DFU_VIRTUAL
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>"
when only several device are used, the format is:
- <interface> <dev>'='alternate list (';' separated)
- each interface is separated by '&'
dfu_alt_info=\
"<interface1> <dev1>=<alt1>;....;<altN>&"\
"<interface2> <dev2>=<altN+1>;....;<altM>&"\
...\
"<interfaceI> <devI>=<altY+1>;....;<altZ>&"
"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>] [<timeout>]
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. If CONFIG_DFU_TIMEOUT option
is enabled and <timeout> parameter is present in the command line,
the DFU operation will be aborted automatically after <timeout>
seconds of waiting remote to initiate DFU session.
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
<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
"mtd" (all MTD device: NAND, SPI-NOR, SPI-NAND,...)
cmd: dfu 0 mtd <dev>
with <dev> the mtd identifier as defined in mtd command
(nand0, nor0, spi-nand0,...)
each element in "dfu_alt_info" =
<name> raw <offset> <size> raw access to mtd 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
"virt"
cmd: dfu 0 virt <dev>
each element in "dfu_alt_info" =
<name>
<interface> and <dev> are absent:
the dfu command to use multiple devices
cmd: dfu 0 list
cmd: dfu 0
"dfu_alt_info" variable provides the list of <interface> <dev> with
alternate list separated by '&' with the same format for each <alt>
mmc <dev>=<alt1>;....;<altN>
nand <dev>=<alt1>;....;<altN>
ram <dev>=<alt1>;....;<altN>
sf <dev>=<alt1>;....;<altN>
mtd <dev>=<alt1>;....;<altN>
virt <dev>=<alt1>;....;<altN>
Callbacks:
The weak callback functions can be implemented to manage specific behavior
- dfu_initiated_callback : called when the DFU transaction is started,
used to initiase the device
- dfu_flush_callback : called at the end of the DFU write after DFU
manifestation, used to manage the device when
DFU transaction is closed
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 1: 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
Example 2: firmware located in NOR (sf) and NAND, with:
- alternate 1 (alt=1) for SPL partition (NOR GPT partition 1)
- alternate 2 (alt=2) for U-Boot partition (NOR GPT partition 2)
- alternate 3 (alt=3) for U-Boot-env partition (NOR GPT partition 3)
- alternate 4 (alt=4) for UBI partition (NAND GPT partition 1)
U-Boot> env set dfu_alt_info \
"sf 0:0:10000000:0=spl part 0 1;u-boot part 0 2; \
u-boot-env part 0 3&nand 0=UBI partubi 0,1"
U-Boot> dfu 0 list
DFU alt settings list:
dev: SF alt: 0 name: spl layout: RAW_ADDR
dev: SF alt: 1 name: ssbl layout: RAW_ADDR
dev: SF alt: 2 name: u-boot-env layout: RAW_ADDR
dev: NAND alt: 3 name: UBI layout: RAW_ADDR
U-Boot> dfu 0
$> dfu-util -l
Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
intf=0, alt=3, name="UBI", serial="002700333338511934383330"
Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
intf=0, alt=2, name="u-boot-env", serial="002700333338511934383330"
Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
intf=0, alt=1, name="u-boot", serial="002700333338511934383330"
Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
intf=0, alt=0, name="spl", serial="002700333338511934383330"
Same example with MTD backend
U-Boot> env set dfu_alt_info \
"mtd nor0=spl part 1;u-boot part 2;u-boot-env part 3&"\
"mtd nand0=UBI partubi 1"
U-Boot> dfu 0 list
using id 'nor0,0'
using id 'nor0,1'
using id 'nor0,2'
using id 'nand0,0'
DFU alt settings list:
dev: MTD alt: 0 name: spl layout: RAW_ADDR
dev: MTD alt: 1 name: u-boot layout: RAW_ADDR
dev: MTD alt: 2 name: u-boot-env layout: RAW_ADDR
dev: MTD alt: 3 name: UBI layout: RAW_ADDR
Example 3: firmware located in SD Card (mmc) and virtual partition on
OTP and PMIC not volatile memory
- alternate 1 (alt=1) for scard
- alternate 2 (alt=2) for OTP (virtual)
- alternate 3 (alt=3) for PMIC NVM (virtual)
U-Boot> env set dfu_alt_info \
"mmc 0=sdcard raw 0 0x100000&"\
"virt 0=otp" \
"virt 1=pmic"
U-Boot> dfu 0 list
DFU alt settings list:
dev: eMMC alt: 0 name: sdcard layout: RAW_ADDR
dev: VIRT alt: 1 name: otp layout: RAW_ADDR
dev: VIRT alt: 2 name: pmic layout: RAW_ADDR
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