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Commit | Line | Data |
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2f24223a PS |
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. |