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changes.mady.by.user Wells Lu

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  1. Output log at UART0 at 115,200 bps.

  2. UART0 pins can be turned off by OTP bit.

  3. Read IV_MX[6..3] pins to decide boot-device.

  4. Support 5 boot-devices: SPI-NOR flash, SPI-NAND flash, 8-bit NAND flash, eMMC, SD card, USB flash drive (on either USB2.0 or USB3.0 port)

  5. Support secure-boot.

    1. Verify digital signature of x-boot image.

    2. Decrypt x-boot image.

  6. Secure-boot is enabled by OTP bit.

  7. Support warm-boot (wake up from deep-sleep mode).

  8. Support peripheral-reset signal (output from G_MX2).

Main flow

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image-20240125-053602.pngImage Added

image-20240125-053613.pngImage Added

Device drivers

Drivers

Features

8-bit NAND

  1. First block of 8-bit NAND flash should contain Sunplus Boot Profile Header.

  2. Support reading 1K60 ECC sectors.

  3. x-boot image should be stored in 1K60 ECC sectors.

  4. Set MS control of pins of 8-bit NAND flash.

  5. Read cycle-time is 240 nS.

eMMC

  1. x-boot image should be stored at Boot Area Partition 1.

  2. Set MS control of pins of eMMC device.

  3. Bus clock is 25 MHz.

SPI-NAND

  1. First block of SPI-NAND flash should contain Sunplus Boot Profile Header.

  2. Support reading 1K60 ECC sectors.

  3. x-boot image should be stored in 1K60 ECC sectors.

  4. Support X1 and X2 position of SPI-NAND.

  5. Set MS control-bit of pins of SPI-NAND flash.

  6. Bus clock is 11.2 MHz.

SD card

  1. x-boot image should be stored at offset 0 of the file ISPBOOOT.BIN.

  2. File ISPBOOOT.BIN should be stored root directory of first partition of the SD card.

  3. First partition of the SD card should be FAT32 or FAT16 format.

  4. Bus clock is 5 MHz.

USB2.0 Host

  1. x-boot image should be stored at offset 0 of the file ISPBOOOT.BIN.

  2. File ISPBOOOT.BIN should be stored root directory of first partition of the USB flash drive.

  3. First partition of the USB flash drive should be FAT32 or FAT16 format.

  4. Support high-speed read operation only

USB3.0 Host

  1. x-boot image should be stored at offset 0 of the file ISPBOOOT.BIN.

  2. File ISPBOOOT.BIN should be stored root directory of first partition of the USB flash drive.

  3. First partition of the USB flash drive should be FAT32 or FAT16 format.

  4. Support high-speed read operation only

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