umcs(4): Fix two typos in source code comments

- s/frequences/frequencies/

MFC after: 3 days

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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umcs(4): Fix a typo in a kernel message

- s/confguration/configuration/
- s/nornal/normal/

Obtained from: NetBSD
MFC after: 5 days

usb: Remove unused devclass arguments to DRIVER_MODULE.

Fully revert f83f5d58394db57576bbed6dc7531997cabeb102 for the sys/dev/usb/serial
folder, only keeping the zero length packet API introduced in sys/dev/usb
after more reports of USB serial devices not

Fully revert f83f5d58394db57576bbed6dc7531997cabeb102 for the sys/dev/usb/serial
folder, only keeping the zero length packet API introduced in sys/dev/usb
after more reports of USB serial devices not supporting ZLPs.

Reported by: mav@
MFC after: 1 week
Sponsored by: NVIDIA Networking

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Send a zero-length-packet first when opening a BULK endpoint for USB serial
port devices. If it gets eaten it is fine. Many USB device side implementations
don't properly support the clear endpoint h

Send a zero-length-packet first when opening a BULK endpoint for USB serial
port devices. If it gets eaten it is fine. Many USB device side implementations
don't properly support the clear endpoint halt command and if they do, data is lost
because the transmit FIFO is typically reset when this command is received.

Tested by: jmg
MFC after: 1 week
Sponsored by: NVIDIA Networking

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usb: clean up empty lines in .c and .h files

Merge ^/head r357966 through r357999.

Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (2 of many)

r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marke

Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (2 of many)

r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked). Use it in
preparation for a general review of all nodes.
This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Reviewed by: hselasky, kib
Approved by: kib (mentor)
Differential Revision: https://reviews.freebsd.org/D23632

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MFHead @349234

Sponsored by: The FreeBSD Foundation

Some devices take undesired actions when RTS and DTR are
asserted. Some development boards for example will reset on DTR,
and some radio interfaces will transmit on RTS.

This patch allows "stty -f /

Some devices take undesired actions when RTS and DTR are
asserted. Some development boards for example will reset on DTR,
and some radio interfaces will transmit on RTS.

This patch allows "stty -f /dev/ttyu9.init -rtsdtr" to prevent
RTS and DTR from being asserted on open(), allowing these devices
to be used without problems.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D20031

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sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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Merge ^/head r303250 through r304235.

Translate modem status reg bits from ns16550 to SER_* values used by the
tty layer. Also, the line status reg bits are already ns16550 as expected
by the ucom layer, so no need for translation or a

Translate modem status reg bits from ns16550 to SER_* values used by the
tty layer. Also, the line status reg bits are already ns16550 as expected
by the ucom layer, so no need for translation or a local var to hold them.

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dev/usb: use our nitems() macro when param.h is available.

Reviewed by: hselasky

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation

Create a USB_PNP_INFO and use it to export the existing PNP
tables. Some drivers needed some slight re-arrangement of declarations
to accommodate this. Change the USB pnp tables slightly to allow
bet

Create a USB_PNP_INFO and use it to export the existing PNP
tables. Some drivers needed some slight re-arrangement of declarations
to accommodate this. Change the USB pnp tables slightly to allow
better compatibility with the system by moving linux driver info from
start of each entry to the end. All other PNP tables in the system
have the per-device flags and such at the end of the elements rather
that at the beginning.

Differential Review: https://reviews.freebsd.org/D3458

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Merge sync of head

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Make a bunch of USB debug SYSCTLs tunable, so that their value(s) can
be set before the USB device(s) are probed.

Merge from head@274682