| ------------------------------------------------- |
| Simple steps used to test the QSPI at U-Boot |
| ------------------------------------------------- |
| |
| For #1, build the patched U-Boot and load MLO/u-boot.img |
| |
| ---------------------------------- |
| Boot from another medium like MMC |
| ---------------------------------- |
| |
| U-Boot# mmc dev 0 |
| mmc0 is current device |
| U-Boot# fatload mmc 0 0x82000000 MLO |
| reading MLO |
| 55872 bytes read in 8 ms (6.7 MiB/s) |
| U-Boot# fatload mmc 0 0x83000000 u-boot.img |
| reading u-boot.img |
| 248600 bytes read in 19 ms (12.5 MiB/s) |
| |
| -------------------------------------------------- |
| Commands to erase/write u-boot/mlo to flash device |
| -------------------------------------------------- |
| U-Boot# sf probe 0 |
| SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB, mapped at 5c000000 |
| U-Boot# sf erase 0 0x10000 |
| SF: 65536 bytes @ 0x0 Erased: OK |
| U-Boot# sf erase 0x20000 0x10000 |
| SF: 65536 bytes @ 0x20000 Erased: OK |
| U-Boot# sf erase 0x30000 0x10000 |
| SF: 65536 bytes @ 0x30000 Erased: OK |
| U-Boot# sf erase 0x40000 0x10000 |
| SF: 65536 bytes @ 0x40000 Erased: OK |
| U-Boot# sf erase 0x50000 0x10000 |
| SF: 65536 bytes @ 0x50000 Erased: OK |
| U-Boot# sf erase 0x60000 0x10000 |
| SF: 65536 bytes @ 0x60000 Erased: OK |
| U-Boot# sf write 82000000 0 0x10000 |
| SF: 65536 bytes @ 0x0 Written: OK |
| U-Boot# sf write 83000000 0x20000 0x60000 |
| SF: 393216 bytes @ 0x20000 Written: OK |
| |
| For #2, set sysboot to QSPI-1 boot mode(SYSBOOT[5:0] = 100110) and power |
| on. ROM should find the GP header at offset 0 and load/execute SPL. SPL |
| then detects that ROM was in QSPI-1 mode (boot code 10) and attempts to |
| find a U-Boot image header at offset 0x20000 (set in the config file) |
| and proceeds to load that image using the U-Boot image payload offset/size |
| from the header. It will then start U-Boot. |
