[U-Boot] [PATCH v2 10/11] board/ls2080qds: add the procedure to deply QSPI image.

[york sun]

On 03/06/2016 11:57 PM, Yuan Yao wrote:
> From: Yuan Yao <yao.yuan at nxp.com>
> 
> Signed-off-by: Yuan Yao <yao.yuan at 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 6ddad92..21e8c7b 100644
> --- a/board/freescale/ls2080aqds/README
> +++ b/board/freescale/ls2080aqds/README
> @@ -227,3 +227,38 @@ 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,

This procedure seems missing one step. How do users get a working u-boot
supporting QSPI? You patch (03/11) says QSPI and IFC share pins. So users must
build another U-Boot image such as SD boot. Using that as a bridge to boot into
a U-Boot version with QSPI support. Am I right?

York