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@@ -42,16 +42,25 @@ Environment variables:
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separated string of information on each alternate:
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dfu_alt_info="<alt1>;<alt2>;....;<altN>"
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+ when only several device are used, the format is:
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+ - <interface> <dev>'='alternate list (';' separated)
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+ - each interface is separated by '&'
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+ dfu_alt_info=\
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+ "<interface1> <dev1>=<alt1>;....;<altN>&"\
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+ "<interface2> <dev2>=<altN+1>;....;<altM>&"\
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+ ...\
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+ "<interfaceI> <devI>=<altY+1>;....;<altZ>&"
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+
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"dfu_bufsiz" : size of the DFU buffer, when absent, use
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CONFIG_SYS_DFU_DATA_BUF_SIZE (8MiB by default)
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"dfu_hash_algo" : name of the hash algorithm to use
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Commands:
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- dfu <USB_controller> <interface> <dev> list
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+ dfu <USB_controller> [<interface> <dev>] list
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list the alternate device defined in "dfu_alt_info"
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- dfu <USB_controller> <interface> <dev>
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+ dfu <USB_controller> [<interface> <dev>]
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start the dfu stack on the USB instance with the selected medium
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backend and use the "dfu_alt_info" variable to configure the
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alternate setting and link each one with the medium
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@@ -95,6 +104,18 @@ Commands:
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with <partid> is the MTD partition index
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+ <interface> and <dev> are absent:
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+ the dfu command to use multiple devices
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+ cmd: dfu 0 list
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+ cmd: dfu 0
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+ "dfu_alt_info" variable provides the list of <interface> <dev> with
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+ alternate list separated by '&' with the same format for each <alt>
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+ mmc <dev>=<alt1>;....;<altN>
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+ nand <dev>=<alt1>;....;<altN>
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+ ram <dev>=<alt1>;....;<altN>
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+ sf <dev>=<alt1>;....;<altN>
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+
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+
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Host tools:
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When U-Boot runs the dfu stack, the DFU host tools can be used
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to send/receive firmwares on each configurated alternate.
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@@ -103,7 +124,7 @@ Host tools:
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specifications(http://dfu-util.sourceforge.net/) which works with U-Boot.
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Usage:
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- Example for firmware located in eMMC or SD card, with:
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+ Example 1: firmware located in eMMC or SD card, with:
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- alternate 1 (alt=1) for SPL partition (GPT partition 1)
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- alternate 2 (alt=2) for U-Boot partition (GPT partition 2)
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@@ -147,3 +168,34 @@ Usage:
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To request a DFU detach and reset the USB connection:
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$> dfu-util -a 0 -e -R
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+
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+
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+ Example 2: firmware located in NOR (sf) and NAND, with:
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+ - alternate 1 (alt=1) for SPL partition (NOR GPT partition 1)
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+ - alternate 2 (alt=2) for U-Boot partition (NOR GPT partition 2)
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+ - alternate 3 (alt=3) for U-Boot-env partition (NOR GPT partition 3)
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+ - alternate 4 (alt=4) for UBI partition (NAND GPT partition 1)
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+
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+ U-Boot> env set dfu_alt_info \
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+ "sf 0:0:10000000:0=spl part 0 1;u-boot part 0 2; \
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+ u-boot-env part 0 3&nand 0=UBI partubi 0,1"
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+
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+ U-Boot> dfu 0 list
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+
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+ DFU alt settings list:
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+ dev: SF alt: 0 name: spl layout: RAW_ADDR
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+ dev: SF alt: 1 name: ssbl layout: RAW_ADDR
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+ dev: SF alt: 2 name: u-boot-env layout: RAW_ADDR
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+ dev: NAND alt: 3 name: UBI layout: RAW_ADDR
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+
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+ U-Boot> dfu 0
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+
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+ $> dfu-util -l
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+ Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
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+ intf=0, alt=3, name="UBI", serial="002700333338511934383330"
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+ Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
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+ intf=0, alt=2, name="u-boot-env", serial="002700333338511934383330"
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+ Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
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+ intf=0, alt=1, name="u-boot", serial="002700333338511934383330"
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+ Found DFU: [0483:5720] ver=9999, devnum=96, cfg=1,\
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+ intf=0, alt=0, name="spl", serial="002700333338511934383330"
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