Sync up with head (up to r288341).

Merge ^/head r287878 through r288034.

Add alternate descriptors support for if_dwc.

This also adds a newbus interface that allows a SoC to override the
following settings:

- if_dwc specific SoC initialization;
- if_dwc descriptor typ

Add alternate descriptors support for if_dwc.

This also adds a newbus interface that allows a SoC to override the
following settings:

- if_dwc specific SoC initialization;
- if_dwc descriptor type;
- if_dwc MII clock.

This seems to be an old version of the hardware descriptors but it is
still in use in a few SoCs (namely Allwinner A20 and Amlogic at least).

Tested on Cubieboard2 and Banana pi.

Tested for regressions on Altera Cyclone by br@ (old version).

Obtained from: NetBSD

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Remove unnecessary includes and, while here, sort them.

Merge ^/head r287680 through r287877.

Do not call mii_mediachg() from NIC interrupt handler.

This fixes the link instability on banana pi (A20).

Suggested by: yongari

Merge from head

Catch up with head, primarily for the 1.14.4.0 firmware.

Merge ^/head r285153 through r285283.

When initializing the (unused) TX descriptors it is not necessary set the
chain bit.

Obtained from: NetBSD

Use uint32_t consistently to store registers values.

Always use unsigned numbers to avoid undefined behavior on (1 << 31).

Remove unused variables and some stray semicolons.

No functional changes.

Fix the sent packets statistics for if_dwc.

Catch up with HEAD (r280229-r284686).

Merge from head

Merged ^/head r283871 through r284187.

Fix wrong variable name in the previous commit.

Pointy hat to: loos
Reported by: araujo

Fix the OACTIVE handling on if_dwc.

Previously the OACTIVE flag was being set when the tx descriptors are fully
allocated but it wasn't unset anywhere.

As soon as a packet is transmitted, unset the

Fix the OACTIVE handling on if_dwc.

Previously the OACTIVE flag was being set when the tx descriptors are fully
allocated but it wasn't unset anywhere.

As soon as a packet is transmitted, unset the OACTIVE flag and call start
routine to push any pending packets from the tx queue.

This closes another race where a full tx queue would jam the tx path (tx
queue is full, new packets cannot be added to queue and dwc_txstart never
gets called).

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Merge sync of head

MFH: r280643-r281852

Sponsored by: The FreeBSD Foundation

Merge from HEAD

o Remove superfluous includes
o Avoid NULL pointer access
o Fix 'set but not used' warning

Submitted by: Sebastian Huber <sebastian.huber@embedded-brains.de>

Merge from head

Merge r278538 through r279514.

MFH: r278593-r278966

Sponsored by: The FreeBSD Foundation

Merge ^/head r278499 through r278755.