ARM: i.MX: xload-esdhc: Add support for i.MX8 ...

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Allow custom buffer address, device offset ...

Add code to support specifying different buffer address and SD/MMC
device offset to read it from in esdhc_start_image(). This change is
needed to support i.MX8.

NOTE: We intentionnaly "emulate" reading at arbitrary offset in
esdhc_start_image() as opposed to implementing it in
esdhc_read_blocks() in order to avoid having to detect if units of
blocks or bytes should be used to specify offset to CMD18.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Rework to make code be less i.MX6-specific ...

Convert imx6_esdhc_start_image() into a generic esdhc_start_image() by
making accept already filled "struct esdhc" as well as use
esdhc_read_blocks().

With that change, create new imx6_esdhc_start_image() whose sole task
is to properly fill a struct esdhc with appropriate offset and to pass
it on to esdhc_start_image().

Both changes are made with a goal of simplifying adding support of new
SoC in mind (see following commits adding support for i.MX8 as example).

NOTE: This commit does not re-implement imx6_esdhc_load_image(),
instead opting for dropping it, due to lack of any users in the
codebase.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload: Fix compiler warning ...

the ESDHC controller is a 32bit device, so can do DMA only on the
lower 32bit. Fix the compiler warning about casting a pointer to integer
of different size on aarch64 by casting to unsigned long first. Error
out if the destination does not fit into 32bit though.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Find entry in image ...

The binary image generated by barebox contains an instruction at the
very beginning to jump over the header. However, when the image is
written to a SD card and the first 512 bytes are skipped in order to
preserve the partition table then this jump instruction is lost. Instead
of relying on the jump instruction at the image beginning calculate
the image entry from the i.MX header instead of relying on the beginning
of the image being the entry point.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Add debug messages ...

When imx6_esdhc_start_image fails print an error, otherwise print a
success message.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Fix typo successul -> successful ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload-esdhc: Add GPL header ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: xload: implement esdhc xload for i.MX6 ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>