This adapts all files that were identifed by licensecheck
(https://salsa.debian.org/build-common-team/licensecheck.git) as
licensed under the GPL.

The advantage is that these specifiers are machine-parseable which helps
license conformance, e.g. for packaging barebox in Debian.

While touching these files also do some minor comment reformatting to
get some uniform layout.

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

Reduces image size by ~100K (from 699K to 598K) on my test
configuration.

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

Most callers of arm_setup_stack substract a fixed offset of 8, 12 or 16
bytes from the stack top. This is unnecessary as on ARM we have a stack
that decrements before storing values. Substracting this offset probably
goes back to the U-Boot version we forked from. Stop this now.

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

When bootstrapping Barebox via JTAG rdu2_sram_setup() won't be
executed resulting in non functional DEBUG_LL API. Move low-level UART
initialization code to be a part of start_imx6_zii_rdu2() to avoid
that problem.

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

While at it, also remove pinux configuration for RX pin (completely
unused) and fix strange setup_uart()'s indentation.

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

We use BOOTSOURCE_SPI to denote, among other things, QSPI on i.MX7 and
VFxxx, whereas on i.MX6 it is used to mean SPI-NOR. To make functions
like imx_xload() work consistently across various i.MX platforms use
already existent BOOTSOURCE_SPI_NOR constant to mean booting from
SPI-NOR on i.MX6 as well.

Replace all in-tree code that relying on the old value as well.

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

We need to distinguish between the i.MX6d/q and the i.MX6d/q plus SoC
variants. Add a cpu type for them to make that possible in the next
steps.

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

Use symbolic constants for RAM base address, to do that rename
MX6_MMDC_PORT0_BASE_ADDR to MX6_MMDC_PORT01_BASE_ADDR to distinguish
it from SoCs with only one DDR controller (i.MX6UL) where port 0 will
always be at 0x80000000.

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

When we are linked at 0x0 and running at 0x01000000 then
get_runtime_offset() should return 0x01000000 and not 0xff000000. This
makes get_runtime_offset() more consistent and better understandable.

This was tested on a Freescale i.MX53 Quickstart board. Additionally
relocate_to_adr() was tested since that is normally not called.

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

This allows for easier deployments on the different units, as there is no
need to flash different images to the Quad and QuadPlus units anymore.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This adds support for the QuadPlus variant of the board as a separate
Barebox binary.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add support for RDU2 board from Zodiac Inflight Innovations.

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