treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX8M: Add i.MX8MM support ...

This adds support for the i.MX8MM.

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

ARM: i.MX: bbu: early exit when partition too small ...

So far, writing a barebox image exceeding the partition size aborts with
EPERM as truncate isn't implemented:

  ERROR: writing to /dev/flash-boot.barebox failed with Operation
  not permitted
  update failed
  ERROR: fastboot: update barebox: Operation not permitted

This is unfortunate because by the time the truncation fails, erasing
the partition had already occurred. Avoid this by checking prior to the
pwrite_all whether the file to be written is big enough. This is valid
here because barebox update wouldn't be called on a regular file.

While at it, present callers with a more helpful ENOSPC error.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX: bbu: Fix variable type in imx_bbu_internal_v2_write_nand_dbbt() ...

MEMGETBADBLOCK returns loff_t, so that's the type we should use to
store its result.

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

ARM: i.MX: bbu: Fix lseek error check in imx_bbu_internal_v2_write_nand_dbbt() ...

Don't use 'int' to store lseek()'s return value to avoid problems with
large seek offsets. While at it, make sure to populate return error
code from 'errno'.

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

ARM: i.MX8MQ: bbu: Add MMC boot handler ...

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

ARM: i.MX7: bbu: Add I2C and SPI handler ...

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

ARM: i.MX7: bbu: Add MMC boot handler ...

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

ARM: VFxxx: bbu: Add a handler for MMC boot partitions ...

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

ARM: i.MX: bbu: Detect MMC before reading current boot partition ...

In order to be able to read "mmcN.boot" we need to detect that device
first. Not doing so would result in failure if "barebox_update" is
executed before "detect mmc0".

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

ARM: i.MX: bbu: Convert devicefile to device name ...

Data->devicefile can contain absolute path to target device, so we
need to convert it to a device name before we can safely use it.

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

ARM: i.MX: bbu: Check retrun value of getenv() ...

Add code to make sure that getenv() returned correct result and bail
out if it failed.

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

ARM: i.MX51: bbu: Add a handler for MMC boot partitions ...

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

ARM: i.MX: bbu: Add support for v1 header to MMC boot handler ...

Convert imx_bbu_internal_v2_mmcboot_update() to use imx_bbu_update()
for actual update in order to be able to support v1 as well as v2
headers. While at it rename the function to
imx_bbu_internal_mmcboot_update() to reflect that change.

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

ARM: i.MX: bbu: Use pwrite_full() instead of pwrite() ...

Use pwrite_full() instead of pwrite() to make sure that all of the
data was written to target device. While at it adjust return value of
imx_bbu_write_device() to be zero in case of success.

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

ARM: i.MX: bbu: Add support for MMC on i.MX8MQ ...

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

ARM: i.MX: bbu: Add support for SPI/I2C on VFxxx ...

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

ARM: i.MX: bbu: Adjust FLASH_HEADER_OFFSET_MMC for i.MX8MQ ...

Flash header is located at 33KiB mark on i.MX8MQ, so we need to take
that into account when initializing imx_handler->flash_header_offset.

Convert FLASH_HEADER_OFFSET_MMC into a function call that will check
if Barebox is running on i.MX8MQ CPU and adjust the offset
accordingly.

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

ARM: i.MX: bbu: Move protect code into a separate routine ...

Both code sections responsible for enabling/disabling underlying
device write protection are almost identical to each other. To avoid
code duplication move them into a separate routine and adjust the rest
of the code accordignly.

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

ARM: i.MX: bbu: Alias imx5*_bbu_internal_spi_i2c_register_handler() ...

Alias imx5*_bbu_internal_spi_i2c_register_handler() to a common function.

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

ARM: i.MX: bbu: Alias imx5*_bbu_internal_mmc_register_handler() ...

Alias imx5*_bbu_internal_mmc_register_handler() to
imx_bbu_internal_mmc_register_handler()

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

ARM: i.MX: bbu: Detect which platforms need v2 i.MX header ...

Detect which platforms need header v2 based on current CPU type and
replace all of the code explicitly specifying that.

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

ARM: i.MX: bbu: Constify all 'devicefile' arguments ...

Constify all 'devicefile' arguments since they are treated as so by
all of the users in BBU code.

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

ARM: i.MX: bbu: Simplify imx53_bbu_internal_nand_register_handler() ...

Second parameter of __init_handler() will initialize
handler.devicefile for us, so there's no need to to it explicitly
after.

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

ARM: i.MX: bbu: Consolidate various update helpers ...

All three, imx_bbu_internal_v1_update(), imx_bbu_external_update() and
imx_bbu_internal_v2_update() are doing exactly the same thing. Instead
of having three almost identical functions, convert
imx_bbu_internal_v2_update() (the most versatile of the three) to be a
generic function and use it everywhere.

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

ARM: i.MX: bbu: Drop IMX_INTERNAL_FLAG_NAND ...

Replace IMX_INTERNAL_FLAG_NAND with a function pointer that can be
customized by individual registration functions. The change by iteself
doesn't have that much value, however it makes the simplification in
the commit that follows more straightforward.

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

ARM: i.MX: bbu: Move inner-image type check ...

Since imx_bbu_check_prereq() already uses file_detect_type() and we've
extended it to understand i.MX boot image file type, we can simplify a
bunch of repetitive code as follows:

    1. Convert all checks from IVT_BARKER to filetype_imx_image_v2
       check

    2. Move all of the checking to be a part of imx_bbu_check_prereq()

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

ARM: i.MX: bbu: Remove unused define ...

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

ARM: i.MX: bbu: support partitions starting at i.MX header ...

The i.MX header is at an offset in the boot device, usually 0x400 bytes.
This patch adds a flag to support the case that the partition the image
is written to starts at that offset rather than 0x0.

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

ARM: i.MX: bbu: reimplement IMX_INTERNAL_FLAG_KEEP_DOSPART flag ...

This patch reimplements the IMX_INTERNAL_FLAG_KEEP_DOSPART flag
and makes it more generic. Until now we only kept a dos partition
table over the update. Beginning with i.MX8 we may also want to
preserve a GPT, so we have to extend the preserved area.

It might also be the case that not (only) a partition table is
stored in the initial area of a device, but also other unrelated
data, so it's better to just keep the initial area that is unused
by the i.MX ROM. It's also good to export the flag to allow boards
to specify the initial area shall be preserved.

When a board wants to set the flag for a mtd like device then it
has to check for suitable erase sizes beforehand. We do not check
this (yet).

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