[U-Boot] [PATCH 1/3] efi_loader: support USB boot in distro boot script

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Sun, Oct 14, 2018 at 02:21:11AM +0300, Tuomas Tynkkynen wrote:
> Hi Takahiro,
> 
> On Fri, 12 Oct 2018 14:09:07 +0900
> AKASHI Takahiro <takahiro.akashi@linaro.org> wrote:
> 
> > With this patch, a removable USB mass storage device attached to the
> > system will also be scanned to find and boot an EFI binary (that is
> > BOOTEFI_NAME, see config_distro_bootcmd.h).
> > 
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> > ---
> >  include/config_distro_bootcmd.h | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/config_distro_bootcmd.h
> > b/include/config_distro_bootcmd.h index 76e12b7bf4ee..dd47e27d6835
> > 100644 --- a/include/config_distro_bootcmd.h
> > +++ b/include/config_distro_bootcmd.h
> > @@ -26,7 +26,12 @@
> >   */
> >  
> >  #define BOOTENV_SHARED_BLKDEV_BODY(devtypel) \
> > -		"if " #devtypel " dev ${devnum}; then " \
> > +		"if test " #devtypel " = usb ; then " \
> > +			"if " #devtypel " info ${devnum}; then " \
> > +				"setenv devtype " #devtypel "; " \
> > +				"run scan_dev_for_boot_part; " \
> > +			"fi;" \
> > +		"elif " #devtypel " dev ${devnum}; then " \
> >  			"setenv devtype " #devtypel "; " \
> >  			"run scan_dev_for_boot_part; " \
> >  		"fi\0"
> 
> I can't see how this patch is needed - "usb dev" is a valid command
> (via do_usb() -> blk_common_cmd()) as long as CONFIG_USB_STORAGE is set.

Right.
I didn't notice this sub-command, dev, because I first consulted
"help usb" with default qemu_arm64_defconfig which doesn't have
CONFIG_USB_STORAGE. Since then I've believed it was not available.

Yet my patch #2&#3 should work.

-Takahiro Akashi