mirror of
https://github.com/AsahiLinux/u-boot
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106 lines
3 KiB
ReStructuredText
106 lines
3 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+
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.. Copyright (C) 2023 Johan Jonker <jbx6244@gmail.com>
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RKMTD
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=====
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Info
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----
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The command rkmtd creates a virtual block device to transfer
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Rockchip boot block data to and from NAND with block orientated
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tools like "ums" and "rockusb".
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It uses the Rockchip MTD driver to scan for boot blocks and copies
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data from the first block in a GPT formatted virtual disk.
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Data must be written in U-boot "idbloader.img" format and start at
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partition "loader1" offset 64. The data header is parsed
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for length and offset. When the last sector is received
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it erases up to 5 erase blocks on NAND and writes boot blocks
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in a pattern depending on the NAND ID. Data is then verified.
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When a block turns out bad the block header is discarded.
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Limitations
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-----------
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- Support with CONFIG_ROCKCHIP_NAND MTD driver only.
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- Support for Rockchip boot block header type 1 only.
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- Pattern for listed NAND IDs only. (Logic still not disclosed by Rockchip)
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- The MTD framework driver data and NAND ID must be extracted at a lower level.
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Available rkmtd commands
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------------------------
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.. code-block:: bash
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rkmtd bind <label> - bind RKMTD device
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rkmtd unbind <label> - unbind RKMTD device
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rkmtd info [<label>] - show all available RKMTD devices
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rkmtd dev [<label>] - show or set current RKMTD device
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U-boot settings
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---------------
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Config to enable Rockchip MTD support:
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.. code-block:: bash
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CONFIG_MTD=y
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CONFIG_MTD_RAW_NAND=y
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CONFIG_SYS_NAND_DRIVER_ECC_LAYOUT=y
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CONFIG_SYS_NAND_USE_FLASH_BBT=y
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CONFIG_ROCKCHIP_NAND=y
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Option to keep existing NAND data unchanged:
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.. code-block:: bash
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CONFIG_ROCKCHIP_NAND_SKIP_BBTSCAN=y
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Commands to enable:
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.. code-block:: bash
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CONFIG_CMD_USB=y
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CONFIG_CMD_RKMTD=y
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CONFIG_CMD_ROCKUSB=y
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CONFIG_CMD_USB_MASS_STORAGE=y
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Linux Host (PC) tool commands combinations that work
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----------------------------------------------------
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.. table::
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:widths: 20 44
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==================== ============================================
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U-boot Linux
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==================== ============================================
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rkmtd bind 0
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rockusb 0 rkmtd 0
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upgrade_tool pl
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upgrade_tool rl 64 512 idbloader_backup.img
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upgrade_tool wl 64 idbloader.img
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upgrade_tool rd
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rkdeveloptool ppt
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rkdeveloptool rl 64 512 idbloader_backup.img
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rkdeveloptool wlx loader1 idbloader.img
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rkdeveloptool wl 64 idbloader.img
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rkdeveloptool rd
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rkflashtool r 64 512 > idbloader_backup.img
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rkflashtool w 64 512 < idbloader.img
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ums 0 rkmtd 0
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dd if=/dev/sda1 of=idbloader_backup.img
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dd if=idbloader.img of=/dev/sda1
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==================== ============================================
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