Eric Lee / smarc-uboot

11 Oct, 2019

1 commit

30 Sep, 2019

1 commit

29 Sep, 2019

1 commit

  • 77ac4a3e3   MLK-22444-2: nand: mxs_nand: add API for switching different BCH layouts ... Browse Code »

    On i.MX7 in a sake of reducing the disturbances caused by a neighboring
    cells in the FCB page in the NAND chip, a randomizer is enabled when
    reading the FCB page by ROM bootloader.

    Add API for setting BCH to specific layout (and restoring it back) used by
    ROM bootloader to be able to burn it in a proper way to NAND using
    nandbcb command.

    Signed-off-by: Igor Opaniuk
    Signed-off-by: Anti Sullin

    Signed-off-by: Alice Guo
    (cherry picked from commit eaba02830252ed044e319571a7f3ebed412ae93b)

    Igor Opaniuk
     

16 Jul, 2019

1 commit

  • 49538a259   i.MX6: nand: add nandbcb command for imx ... Browse Code »

    Writing/updating boot image in nand device is not
    straight forward in i.MX6 platform and it requires
    boot control block(BCB) to be configured.

    It becomes difficult to use uboot 'nand' command to
    write BCB since it requires platform specific attributes
    need to be taken care of.

    It is even difficult to use existing msx-nand.c driver by
    incorporating BCB attributes like mxs_dma_desc does
    because it requires change in mtd and nand command.

    So, cmd_nandbcb implemented in arch/arm/mach-imx

    BCB contains two data structures, Firmware Configuration Block(FCB)
    and Discovered Bad Block Table(DBBT). FCB has nand timings,
    DBBT search area, page address of firmware.

    On summary, nandbcb update will
    - erase the entire partition
    - create BCB by creating 2 FCB/DBBT block followed by
    1 FW block based on partition size and erasesize.
    - fill FCB/DBBT structures
    - write FW/SPL on FW1
    - write FCB/DBBT in first 2 blocks

    for nand boot, up on reset bootrom look for FCB structure in
    first block's if FCB found the nand timings are loaded for
    further reads. once FCB read done, DTTB will load and finally
    firmware will be loaded which is boot image.

    Refer section "NAND Boot" from doc/imx/common/imx6.txt for more usage
    information.

    Signed-off-by: Jagan Teki
    Signed-off-by: Sergey Kubushyn
    Signed-off-by: Shyam Saini
    Signed-off-by: Han Xu

    Shyam Saini