[U-Boot] [RFC PATCH] fpga: Added support to load bit stream from SD/MMC

[Michal Simek]

Hi Tom,

On 05/02/2014 04:10 PM, Michal Simek wrote:
> From: Siva Durga Prasad Paladugu <siva.durga.paladugu at xilinx.com>
> 
> Added support to load a bitstream image in chunks by reading it in
> chunks from SD/MMC.
> Command format:
> loadfs [dev] [address] [image size] [blocksize] <interface>
>        [<dev[:part]>] <filename>
> Example: fpga loadfs 0 1000000 3dbafc 4000 mmc 0 fpga.bin
> 
> Signed-off-by: Siva Durga Prasad Paladugu <sivadur at xilinx.com>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
> 
> We have tested just FAT case but I am sending this as RFC
> to give some inputs from you.
> The reason for this command is that when u-boot running
> from OCM on zynq there is just 192kB for u-boot itself
> and there must be an option to load bitstream to PL
> because there full DDR controller.
> Bitstreams are bigger and bigger and reading it with chunks
> is only one way how to do it.
> This is also necessary to do it for u-boot SPL when
> we add fpga support there.
> 
> The question is if this is the way how to extend fpga command
> because loadfs should be fpga subcommand.
> 
> This patch is based on this branch.
> http://git.denx.de/?p=u-boot/u-boot-microblaze.git;a=shortlog;h=refs/heads/xnext/zynq
> 
> Thanks for your comments,
> Michal
> 
> ---
>  common/cmd_fpga.c             | 41 +++++++++++++++++++++
>  drivers/fpga/fpga.c           | 28 ++++++++++++++
>  drivers/fpga/xilinx.c         | 16 ++++++++
>  drivers/fpga/zynqpl.c         | 85 +++++++++++++++++++++++++++++++++++++++++++
>  include/configs/zynq-common.h |  1 +
>  include/fpga.h                |  9 +++++
>  include/xilinx.h              |  3 ++
>  7 files changed, 183 insertions(+)

Are you OK with this patch?
I would expect that you will have some comments regarding this because it is
command extension.
If you are OK with this I will add it to my next fpga pull request with
partial bitstream support.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform


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