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| author | Poddar, Sourav <sourav.poddar@ti.com> | 2013-10-07 15:53:04 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-10-07 17:55:52 +0530 |
| commit | 2f24223ae150d9496694885cee401f4525b72acb (patch) | |
| tree | 287474c6d30ac52d78d2bb95cd153a6cdc255f87 /doc/SPI/README.ti_qspi_dra_test | |
| parent | 247cdf041351329cce2e24ab1080a83db4f3d254 (diff) | |
| download | blackbird-obmc-uboot-2f24223ae150d9496694885cee401f4525b72acb.tar.gz blackbird-obmc-uboot-2f24223ae150d9496694885cee401f4525b72acb.zip | |
README: qspi usecase and testing documentation.
Contains documentation and testing details for qspi flash
interface.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Diffstat (limited to 'doc/SPI/README.ti_qspi_dra_test')
| -rw-r--r-- | doc/SPI/README.ti_qspi_dra_test | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/doc/SPI/README.ti_qspi_dra_test b/doc/SPI/README.ti_qspi_dra_test new file mode 100644 index 0000000000..fe37857236 --- /dev/null +++ b/doc/SPI/README.ti_qspi_dra_test @@ -0,0 +1,48 @@ +------------------------------------------------- + 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 +SF: Warning - Only lower 16MiB accessible, Full access #define CONFIG_SPI_FLASH_BAR +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. |
