src/sys/dev/uart/uart_dev_pl011.c, branch release/12.3.0FreeBSD source treehttps://cgit-dev.freebsd.org/src/atom?h=release%2F12.3.02019-05-28T22:22:40ZMFC r345405,345406,346228,346657,348195,348198: UART SPCR fixes.2019-05-28T22:22:40ZColin Percivalcperciva@FreeBSD.org2019-05-28T22:22:40Zurn:sha1:92182fab8a21dc8f5356ffe82a6562b99b8a8516
r345405: Obey SPCR AccessWidth parameter.
r345406: Initialize uart_bus_space_mem on arm64.
r346228: Add quirk to ignore AccessWidth on PL011 UART.
r346657: Handle SPCR BaudRate = 0.
r348195: Extract arm64 SPCR code and make it MI; use on x86 too.
r348198: Fix for r348195.
This unbreaks the console on EC2 a1.* and *.metal instances.
Sponsored by: https://www.patreon.com/cperciva
add snps IP uart support / genaralize UART2018-08-19T21:10:21ZMatt Macymmacy@FreeBSD.org2018-08-19T21:10:21Zurn:sha1:381388b9c48b07b08199b07b7657d46e8fcb59b0
This is an amalgam of a patch by Doug Ambrisko to
generalize uart_acpi_find_device, imp moving the
ACPI table to uart_dev_ns8250.c and advice by jhb
to work around a bug in the EPYC 3151 BIOS
(the BIOS incorrectly marks the serial ports as
disabled)
Reviewed by: imp
MFC after: 8 weeks
Differential Revision: https://reviews.freebsd.org/D16432
The Arm pl011 driver assumes it's running a devicetree based system.2018-02-28T15:02:27ZAndrew Turnerandrew@FreeBSD.org2018-02-28T15:02:27Zurn:sha1:92457451f4e936c87cba1534628b6014b5501194
It calls OF_* functions to check if it needs to implement workarounds.
This may not be the case on arm64 where we support both FDT and ACPI.
Fix this by checking if we are booting on FDT before calling these checks.
Reviewed by: ian
Sponsored by: DARPA, AFRL
Sponsored by: Cavium (Hardware)
Differential Revision: https://reviews.freebsd.org/D14515
Teach the Arm pl011 driver to attach to a SBSA uart. This is defined in2018-02-25T19:43:00ZAndrew Turnerandrew@FreeBSD.org2018-02-25T19:43:00Zurn:sha1:615395d9851af5e55ca315ba25b7f787c2e4af13
the Server Base System Architecture to be a subset of the pl011 r1p5. As
we don't use the removed features it is safe to just attach to the existing
driver as is.
Sponsored by: DARPA, AFRL
Rename the FDT compat_data array to a bus-specific name.2018-02-25T19:33:27ZAndrew Turnerandrew@FreeBSD.org2018-02-25T19:33:27Zurn:sha1:db65b25f88676dc213bf6da75e257cf3727b15a5
Sponsored by: DARPA, AFRL
Do pass removing some write-only variables from the kernel.2017-12-25T04:48:39ZAlexander Kabaevkan@FreeBSD.org2017-12-25T04:48:39Zurn:sha1:151ba7933aab5c8edc094715bffd9b97d84d2407
This reduces noise when kernel is compiled by newer GCC versions,
such as one used by external toolchain ports.
Reviewed by: kib, andrew(sys/arm and sys/arm64), emaste(partial), erj(partial)
Reviewed by: jhb (sys/dev/pci/* sys/kern/vfs_aio.c and sys/kern/kern_synch.c)
Differential Revision: https://reviews.freebsd.org/D10385
sys/dev: further adoption of SPDX licensing ID tags.2017-11-27T14:52:40ZPedro F. Giffunipfg@FreeBSD.org2017-11-27T14:52:40Zurn:sha1:718cf2ccb9956613756ab15d7a0e28f2c8e91cab
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.
Extend the pl011 small-fifos fix to other SoCs that indicate rev 52017-03-11T22:34:02ZIan Leporeian@FreeBSD.org2017-03-11T22:34:02Zurn:sha1:bf8bdd6762b3eaef7ddb1203600c06c0ed8331b4
hardware but lack the larger fifos rev 5 hardware should have.
The linux world (where our FDT data comes from) solved this by adding
a new property to pl011 nodes, "arm,primecell-periphid". When this
property is present, its values override the values in the hardware
periphid registers. For pl011 rev 5 hardware with small fifos, they
override the id so that it appears to be rev 4 hardware.
The driver now uses the new property when present. It also continues
to check the device compat string, to handle older fdt data that may
still be in use on existing systems (on RPi systems it is common to
update system software without updating fdt data which is part of the
boot firmware).
Reviewed by: imp
Handle fifo size differences between older and newer revs of pl011 hardware.2017-03-08T18:53:32ZIan Leporeian@FreeBSD.org2017-03-08T18:53:32Zurn:sha1:2cb357c5cd2ba914dcffcd1fa4301beff2356125
Starting with rev 5 (which is inexplicably indicated by a version number
of '3' in the Peripheral ID register), the pl011 doubled the size of the
rx and tx fifos, to 32 bytes, so read the ID register and set the size
variables in the softc accordingly.
An interesting wrinkle in this otherwise-simple concept is that the
bcm2835 SoC, used in Raspberry Pi systems among others, has the rev 5
pl011 hardware, but somehow also has the older 16-byte fifos. We check
the FDT data to see if the hardware is part of a bcm283x system and use
the smaller size if so.
Thanks to jchandra@ for pointing out that newer hardware has bigger fifos.
Reconfigure the fifo watermark levels on the pl011 uart to interrupt when2017-03-04T22:00:05ZIan Leporeian@FreeBSD.org2017-03-04T22:00:05Zurn:sha1:ac0577afe964ea3e643aac877ef8369261cd5a69
the fifos are 3/4 full (rc) or empty (tx).