[U-Boot,v4,20/20] rockchip: rk3188: add README.rockchip paragraph describing sd boot
diff mbox

Message ID 20170218184640.30635-21-heiko@sntech.de
State Accepted
Commit f46b859bfb1f1cf95721efbc04c22cb27dc70f80
Delegated to: Simon Glass
Headers show

Commit Message

Heiko Stuebner Feb. 18, 2017, 6:46 p.m. UTC
Building sd images for rk3188 requires more steps due to the needed split
into TPL and SPL as loaders. Describe how to build an image for it in a
separate paragraph in the READER.rockchip file.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 doc/README.rockchip | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

Comments

Simon Glass Feb. 21, 2017, 6:08 p.m. UTC | #1
Hi Heiko,

On 18 February 2017 at 11:46, Heiko Stuebner <heiko@sntech.de> wrote:
> Building sd images for rk3188 requires more steps due to the needed split
> into TPL and SPL as loaders. Describe how to build an image for it in a
> separate paragraph in the READER.rockchip file.
>
> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
> ---
>  doc/README.rockchip | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)

Acked-by: Simon Glass <sjg@chromium.org>

It would be great to implement this image creation in binman. It will
need to have support for tpl and rc4.

- Simon
Simon Glass Feb. 21, 2017, 8:35 p.m. UTC | #2
On 21 February 2017 at 11:08, Simon Glass <sjg@chromium.org> wrote:
> Hi Heiko,
>
> On 18 February 2017 at 11:46, Heiko Stuebner <heiko@sntech.de> wrote:
>> Building sd images for rk3188 requires more steps due to the needed split
>> into TPL and SPL as loaders. Describe how to build an image for it in a
>> separate paragraph in the READER.rockchip file.
>>
>> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
>> ---
>>  doc/README.rockchip | 26 ++++++++++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>
> Acked-by: Simon Glass <sjg@chromium.org>
>
> It would be great to implement this image creation in binman. It will
> need to have support for tpl and rc4.
>
> - Simon

Applied to u-boot-rockchip, thanks!

Patch
diff mbox

diff --git a/doc/README.rockchip b/doc/README.rockchip
index 43cafc7bd6..744fdcea14 100644
--- a/doc/README.rockchip
+++ b/doc/README.rockchip
@@ -147,6 +147,32 @@  For evb_rk3036 board:
 Note: rk3036 SDMMC and debug uart use the same iomux, so if you boot from SD, the
       debug uart must be disabled
 
+
+Booting from an SD card on RK3188
+=================================
+
+For rk3188 boards the general storage onto the card stays the same as
+described above, but the image creation needs a bit more care.
+
+The bootrom of rk3188 expects to find a small 1kb loader which returns
+control to the bootrom, after which it will load the real loader, which
+can then be up to 29kb in size and does the regular ddr init.
+
+Additionally the rk3188 requires everything the bootrom loads to be
+rc4-encrypted. Except for the very first stage the bootrom always reads
+and decodes 2kb pages, so files should be sized accordingly.
+
+# copy tpl, pad to 1020 bytes and append spl
+cat tpl/u-boot-tpl.bin > tplspl.bin
+truncate -s 1020 tplspl.bin
+cat spl/u-boot-spl.bin >> tplspl.bin
+tools/mkimage -n rk3188 -T rksd -d tplspl.bin out
+
+# truncate, encode and append u-boot.bin
+truncate -s %2048 u-boot.bin
+cat u-boot.bin | split -b 512 --filter='openssl rc4 -K 7C4E0304550509072D2C7B38170D1711' >> out
+
+
 Using fastboot on rk3288
 ========================
 - Write GPT partition layout to mmc device which fastboot want to use it to