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Currently we check the U-Boot (legacy!) image header checksum very early
and bail out with an error message if it does not match.

Move that check later into the function, *after* we have established
that we are actually dealing with such an U-Boot image.

This avoids confusing error messages in case there is no U-Boot image
used at all.
Signed-off-by: Andre Przywara <osp@andrep.de>

spi: Add H616 support

The H616 SPI is very similar to the H6, only differs in the GPIOs
(again).
Add the SoC-ID at the right places and add the GPIOs according to the
manual.

Tested on OrangePi Zero 2.
Signed-off-by: Andre Przywara <osp@andrep.de>

wdreset: Add remaining SoCs

Enabling SPI flash support for H6 & R40 (+ fixes)

meminfo: Replace sys/io.h by direct register accesses.

The CCU section in all Allwinner manuals asks to de-assert the reset
signal first, then to ungate the bus clock.
On a nearby note it also requires to switch dividers before changing the
clock source.

The SPI flash code violated those two rules, fix this to make the code
more robust.
Signed-off-by: Andre Przywara <osp@andrep.de>

Shifting signed types to the left is dodgy, especially by 31 bits, since
it depends on the result type whether the result is undefined or not.

Do not take any chances here, and mark those shift bases as unsigned where
we can or will hit bit 31, to avoid undefined behaviour.
Signed-off-by: Andre Przywara <osp@andrep.de>

As Icenowy rightfully assumed, the V831 SPI support covers the H6 as
well. The only difference was a slight deviation in the pinmux setup:
the H6 has the SPI0-CS on pin PC5, the V831 on pin PC1.

Just add the right SoC ID and tweak the pinmux setup to enable it.

Tested on a Pine H64.
Signed-off-by: Andre Przywara <osp@andrep.de>

The R40 is closely related to the A20, but has in fact a newer
generation SPI controller.
Add the R40 SoC ID to the right places to enable SPI support.

Tested on a Bananapi M2 Berry with SPI flash attached to header pins.
Signed-off-by: Andre Przywara <osp@andrep.de>

The "wdreset" command so far only covered a few SoCs.

Add the watchdog data for the other ones as well.
Signed-off-by: Andre Przywara <osp@andrep.de>

spi: fix GPIO base address

Resolve typo for GPIO base address for SoCs other than V831.
Signed-off-by: Nazım Gediz Aydındoğmuş <gedizaydindogmus@gmail.com>

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

Add support for H616

V831 SoC support

The Allwinner V831 SoC has similar memory map and CCU with H6.

Add support for it by make the code to dynamically acquire the SPI0
memory base and add clock setup for V831.

These code should work on H6 too, but I am too lazy to test it.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

V831 SoC is one of sun8i family (with Cortex-A7 CPUs), and it follows a
similar memory map with H6.

Add support for it. The detection for H6-style memory map is positive on
V831, because it have the same version of GIC at the same address.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

The non-IRQ stack is moved to near the end of the SRAM C, which is very
high, and have no need to save.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

fel: enable A83T MMU

fel: SPI: add Eon support

spi: add support for V3s SoC

Add the JEDEC manufacturer ID for Eon to the list of recognized
vendors, also add the EN25QH series to the list of supported chips.
Those chips are used on some internal boards with V831 from Sipeed now,
but the chips themselves are widely available on the market. Tag the
struct definition with the member names on the way to improve readability
of the SPI flash chip description.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

The Allwinner V3s SoC have the same SPI0 pinmux configuration, SPI clock
configuration and SPI controller (base address and the controller) with
H3.

Add spiflash support for it.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

Add support for reading A10 SPI flash

A20 wdreset support

Provide a wrapper for reset via watchdog
Tested-By: Priit Laes plaes@plaes.org # On A20 with custom patch

Signed-off-by: Priit Laes <plaes@plaes.org>

The watchdog register isn't in the same place, nor uses the same values
to trigger a reset.
Signed-off-by: Karl Palsson <karlp@tweak.net.au>

The watchdog register isn't in the same place, nor uses the same values
to trigger a reset.
Signed-off-by: Karl Palsson <karlp@tweak.net.au>

FEL: introduce semantic versioning for SPL header

Add support for SPI on A20

A20 (as does A10) uses pins 0,1,2 and 23 in bank C
for SPI 0.
Signed-off-by: Priit Laes <priit.laes@paf.com>

Signed-off-by: Priit Laes <priit.laes@paf.com>

Every addition of a new feature to the SPL header currently requires us
to update the FEL tool, to teach it about the new supported maximum
value. Many times the FEL tool doesn't really care, but complains
anyway - and refuses to load.
Let's introduce semantic versioning [1] for this field, where backwards
compatible additions just increase a minor number, but incompatible
changes require bumping the major version.
We have 8 bits for the SPL header version, let's split this to have 3 bits
for the major and 5 bit for the minor version number.

[1] https://semver.org

Signed-off-by: Andre Przywara <osp@andrep.de>
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

v1.5-rc1

In the first case:

    pio.c: In function ‘main’:
    pio.c:355:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
        usage(0);
        ^~~~~~~~
    pio.c:356:3: note: here
       case 'm':
       ^~~~

The fallthrough is not intended because `usage()` never returns (it calls
`exit` unconditionally). Annotate as `noreturn` so the compiler realises this.

In the second case:

    fexc.c: In function ‘main’:
    fexc.c:312:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
       filename[1] = argv[optind+1]; /* out */
       ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
    fexc.c:313:2: note: here
      case 1:
      ^~~~

The fallthrough appears to be intended (the two argument case is a superset of
the one argument case). Annotate with a comment which tells the compiler this
is intended.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>

Add the JEDEC manufacturer ID for Macronix to the list of recognized
vendors, also add the MX25L series to the list of supported chips.
Those chips are used on the OrangePi PC 2 boards, for instance.
Tag the struct definition with the member names on the way to improve
readability of the SPI flash chip description.
Signed-off-by: Andre Przywara <osp@andrep.de>