On 10/10/2016 11:04 PM, Yuan Yao wrote:
From: Yuan Yao yao.yuan@nxp.com
Signed-off-by: Yuan Yao yao.yuan@nxp.com
board/freescale/ls2080aqds/README | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/board/freescale/ls2080aqds/README b/board/freescale/ls2080aqds/README index f288750..0f7446a 100644 --- a/board/freescale/ls2080aqds/README +++ b/board/freescale/ls2080aqds/README @@ -188,3 +188,38 @@ DPMAC14 -> PHY4-P1 DPMAC15 -> PHY4-P2 DPMAC16 -> PHY4-P3
+Booting from QSPI +------------------- +Booting from QSPI requires two images, RCW and u-boot-dtb.bin. +The difference between QSPI boot RCW image and NOR boot image is the PBI +command sequence. Below is the setting for PBI commands for QDS which boot +on QSPI flash device.
+1) CCSR 4-byte write to 0x00e00404, data=0x00000000 +2) CCSR 4-byte write to 0x00e00400, data=0x20010000 +The above two commands set bootloc register to 0x00000000_20010000 where +the u-boot code will be running in QSPI flash.
+RCW image should be written to the beginning of QSPI flash device. +Example of using u-boot command
+=> sf probe 0:0 +SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB +=> sf erase 0 +<size of rcw image> +SF: 65536 bytes @ 0x0 Erased: OK +=> sf write <rcw image in memory> 0 <size of rcw image> +SF: 164 bytes @ 0x0 Written: OK
+To get the QSPI image, build u-boot with QSPI config, for example, +ls2080aqds_qspi_defconfig. The image needed is u-boot-dtb.bin. +The u-boot image should be written to 0x10000.
+=> sf probe 0:0 +SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB +=> sf erase 10000 +<size of u-boot image> +SF: 589824 bytes @ 0x10000 Erased: OK +=> sf write <u-boot image in memory> 10000 <size of u-boot image> +SF: 580966 bytes @ 0x10000 Written: OK
+With these two images in QSPI flash device, the board can boot from QSPI.
Yuan Yao,
I think the procedure can be applied to many of our boards with QSPI, right? It may be better to move this information out of ls2080aqds.
York