When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

Fix two build warnings when building for arm64:

drivers/dfu/dfu_tftp.c: In function ‘dfu_tftp_write’:
drivers/dfu/dfu_tftp.c:59:37: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
  ret = dfu_write_from_mem_addr(dfu, (void *)addr, len);
                                     ^
and

drivers/dfu/dfu_tftp.c: In function ‘dfu_tftp_write’:
drivers/dfu/dfu_tftp.c:41:8: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 4 has type ‘__kernel_size_t {aka long unsigned int}’ [-Wformat=]
  debug("%s: image name: %s strlen: %u\n", __func__, sb, strlen(sb));
        ^

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Lukasz Majewski <lukma@denx.de>

Do the following to make the symbol names less confusing.

sed -i "s/\([TU][^_]\+\)_FUNCTION_DFU/DFU_OVER_\1/g" \
	`git grep _FUNCTION_DFU | cut -d ":" -f 1 | sort -u`

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Lukasz Majewski <lukma@denx.de>

Clean up the screaming mess of configuration options that DFU is.
It was impossible to configure DFU such that TFTP is enabled and
USB is not, this patch fixes that and assures that DFU TFTP and
DFU USB can be enabled separatelly and that the correct pieces
of code are compiled in.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Lukasz Majewski <lukma@denx.de>

The DFU code relies on the HASH config option. Make sure it is always there
by selecting it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>

U-Boot widely uses error() as a bit noisier variant of printf().

This macro causes name conflict with the following line in
include/linux/compiler-gcc.h:

  # define __compiletime_error(message) __attribute__((error(message)))

This prevents us from using __compiletime_error(), and makes it
difficult to fully sync BUILD_BUG macros with Linux.  (Notice
Linux's BUILD_BUG_ON_MSG is implemented by using compiletime_assert().)

Let's convert error() into now treewide-available pr_err().

Done with the help of Coccinelle, excluing tools/ directory.

The semantic patch I used is as follows:

// <smpl>
@@@@
-error
+pr_err
 (...)
// </smpl>

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Re-run Coccinelle]
Signed-off-by: Tom Rini <trini@konsulko.com>

We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>

- factorize code between read and write transaction
- always use dfu_transaction_cleanup() to initialize
  the internal variable: easy maintenance
- replace direct access by dfu_get_buf() and dfu_get_buf_size()

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

rename cleanup function, as now called by read

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

Change long (32 bits on arm) to u64 (same type than offset)
for size and read offset r_left

So partition and device used for DFU can be greater than 4GB

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>