| Poddar, Sourav | 78a00ce | 2013-10-07 15:53:04 +0530 | [diff] [blame] | 1 | ------------------------------------------------- |
| 2 | Simple steps used to test the QSPI at U-Boot |
| 3 | ------------------------------------------------- |
| 4 | |
| 5 | For #1, build the patched U-Boot and load MLO/u-boot.img |
| 6 | |
| 7 | ---------------------------------- |
| 8 | Boot from another medium like MMC |
| 9 | ---------------------------------- |
| 10 | |
| 11 | U-Boot# mmc dev 0 |
| 12 | mmc0 is current device |
| 13 | U-Boot# fatload mmc 0 0x82000000 MLO |
| 14 | reading MLO |
| 15 | 55872 bytes read in 8 ms (6.7 MiB/s) |
| 16 | U-Boot# fatload mmc 0 0x83000000 u-boot.img |
| 17 | reading u-boot.img |
| 18 | 248600 bytes read in 19 ms (12.5 MiB/s) |
| 19 | |
| 20 | -------------------------------------------------- |
| 21 | Commands to erase/write u-boot/mlo to flash device |
| 22 | -------------------------------------------------- |
| 23 | U-Boot# sf probe 0 |
| 24 | SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB, mapped at 5c000000 |
| 25 | SF: Warning - Only lower 16MiB accessible, Full access #define CONFIG_SPI_FLASH_BAR |
| 26 | U-Boot# sf erase 0 0x10000 |
| 27 | SF: 65536 bytes @ 0x0 Erased: OK |
| 28 | U-Boot# sf erase 0x20000 0x10000 |
| 29 | SF: 65536 bytes @ 0x20000 Erased: OK |
| 30 | U-Boot# sf erase 0x30000 0x10000 |
| 31 | SF: 65536 bytes @ 0x30000 Erased: OK |
| 32 | U-Boot# sf erase 0x40000 0x10000 |
| 33 | SF: 65536 bytes @ 0x40000 Erased: OK |
| 34 | U-Boot# sf erase 0x50000 0x10000 |
| 35 | SF: 65536 bytes @ 0x50000 Erased: OK |
| 36 | U-Boot# sf erase 0x60000 0x10000 |
| 37 | SF: 65536 bytes @ 0x60000 Erased: OK |
| 38 | U-Boot# sf write 82000000 0 0x10000 |
| 39 | SF: 65536 bytes @ 0x0 Written: OK |
| 40 | U-Boot# sf write 83000000 0x20000 0x60000 |
| 41 | SF: 393216 bytes @ 0x20000 Written: OK |
| 42 | |
| 43 | For #2, set sysboot to QSPI-1 boot mode(SYSBOOT[5:0] = 100110) and power |
| 44 | on. ROM should find the GP header at offset 0 and load/execute SPL. SPL |
| 45 | then detects that ROM was in QSPI-1 mode (boot code 10) and attempts to |
| 46 | find a U-Boot image header at offset 0x20000 (set in the config file) |
| 47 | and proceeds to load that image using the U-Boot image payload offset/size |
| 48 | from the header. It will then start U-Boot. |