Under construction…
X-Boot is the first-stage boot loader. It is loaded into internal SRAM and run by internal ROM code of SP7350. Note that before X-Boot initializes and trains DRAM controller, DRAM is not available.
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Drivers locations and features
Drivers | Folders | Features |
8-bit NAND | nand/ | Support loading U-Boot image from 8-bit NAND flash. First block of 8-bit NAND flash should contain Sunplus Boot Profile Header. Support reading 1K60 ECC sectors. U-Boot image should be stored in 1K60 sectors.
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ADC | adc/ | |
eMMC | sdmmc/ | Support loading U-Boot image from eMMC device. U-Boot image should be stored at User Data Area. eMMC should contain GUID Partition Table (GPT).
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I2C driver | i2c/ | Support I2C master mode. Support 100kHz and 400kHz speeds.
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NVMEN (OTP) | otp/ | Support read and write OTP.
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SD card | sdmmc/ | Support loading U-Boot image from an SD card. U-Boot image should be stored at root directory of first partition of the SD card. File-name of the U-Boot image should be u-boot.img. First partition of the SD card should be FAT32 or FAT16 format.
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SPI-NAND | nand/ | Support loading U-Boot image from SPI-NAND flash. First block of SPI-NAND flash should contain Sunplus Boot Profile Header. Support reading 1K60 ECC sectors. U-Boot image should be stored in 1K60 ECC sectors. Support SPI-NAND flash mounted in X1 or X2 position.
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USB2.0 Host | usb/ | Support loading U-Boot image from an USB flash drive in USB2.0 port. U-Boot image should be stored at root directory of first partition of the USB flash drive. File-name of the U-Boot image should be u-boot.img. First partition of the USB flash drive should be FAT32 or FAT16 format. Support high-speed read operation only
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USB3.0 Host | usb/ | Support loading U-Boot image from an USB flash drive in USB3.0 port. U-Boot image should be stored at root directory of first partition of the USB flash drive. File-name of the U-Boot image should be u-boot.img. First partition of the USB flash drive should be FAT32 or FAT16 format. Support high-speed read operation only
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