1*2f24223aSPoddar, Sourav------------------------------------------------- 2*2f24223aSPoddar, Sourav Simple steps used to test the QSPI at U-Boot 3*2f24223aSPoddar, Sourav------------------------------------------------- 4*2f24223aSPoddar, Sourav 5*2f24223aSPoddar, SouravFor #1, build the patched U-Boot and load MLO/u-boot.img 6*2f24223aSPoddar, Sourav 7*2f24223aSPoddar, Sourav---------------------------------- 8*2f24223aSPoddar, SouravBoot from another medium like MMC 9*2f24223aSPoddar, Sourav---------------------------------- 10*2f24223aSPoddar, Sourav 11*2f24223aSPoddar, SouravU-Boot# mmc dev 0 12*2f24223aSPoddar, Souravmmc0 is current device 13*2f24223aSPoddar, SouravU-Boot# fatload mmc 0 0x82000000 MLO 14*2f24223aSPoddar, Souravreading MLO 15*2f24223aSPoddar, Sourav55872 bytes read in 8 ms (6.7 MiB/s) 16*2f24223aSPoddar, SouravU-Boot# fatload mmc 0 0x83000000 u-boot.img 17*2f24223aSPoddar, Souravreading u-boot.img 18*2f24223aSPoddar, Sourav248600 bytes read in 19 ms (12.5 MiB/s) 19*2f24223aSPoddar, Sourav 20*2f24223aSPoddar, Sourav-------------------------------------------------- 21*2f24223aSPoddar, SouravCommands to erase/write u-boot/mlo to flash device 22*2f24223aSPoddar, Sourav-------------------------------------------------- 23*2f24223aSPoddar, SouravU-Boot# sf probe 0 24*2f24223aSPoddar, SouravSF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB, mapped at 5c000000 25*2f24223aSPoddar, SouravU-Boot# sf erase 0 0x10000 26*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x0 Erased: OK 27*2f24223aSPoddar, SouravU-Boot# sf erase 0x20000 0x10000 28*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x20000 Erased: OK 29*2f24223aSPoddar, SouravU-Boot# sf erase 0x30000 0x10000 30*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x30000 Erased: OK 31*2f24223aSPoddar, SouravU-Boot# sf erase 0x40000 0x10000 32*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x40000 Erased: OK 33*2f24223aSPoddar, SouravU-Boot# sf erase 0x50000 0x10000 34*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x50000 Erased: OK 35*2f24223aSPoddar, SouravU-Boot# sf erase 0x60000 0x10000 36*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x60000 Erased: OK 37*2f24223aSPoddar, SouravU-Boot# sf write 82000000 0 0x10000 38*2f24223aSPoddar, SouravSF: 65536 bytes @ 0x0 Written: OK 39*2f24223aSPoddar, SouravU-Boot# sf write 83000000 0x20000 0x60000 40*2f24223aSPoddar, SouravSF: 393216 bytes @ 0x20000 Written: OK 41*2f24223aSPoddar, Sourav 42*2f24223aSPoddar, SouravFor #2, set sysboot to QSPI-1 boot mode(SYSBOOT[5:0] = 100110) and power 43*2f24223aSPoddar, Souravon. ROM should find the GP header at offset 0 and load/execute SPL. SPL 44*2f24223aSPoddar, Souravthen detects that ROM was in QSPI-1 mode (boot code 10) and attempts to 45*2f24223aSPoddar, Souravfind a U-Boot image header at offset 0x20000 (set in the config file) 46*2f24223aSPoddar, Souravand proceeds to load that image using the U-Boot image payload offset/size 47*2f24223aSPoddar, Souravfrom the header. It will then start U-Boot. 48