EXT_RESOURCES have been introduced in 12-CURRENT and all supported
releases have it enabled in their kernel config.
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D33823
(cherry picked from commit 36498b1408)
in sampling mode to workaround firmware bug.
This fixes reboot or poweroff on frame.work laptops after first touch.
(cherry picked from commit c508b0818b)
Make sure to reset 'message_done' flag when jumping from a message to the
next one within the same interrupt handler call. This happens only when
a write with no-stop flag message is followed by a write with no-start
flag message.
Without this fix the second message would be prematurely "completed"
without waiting for an ACK (or NACK) for its first byte and without
sending subsequent bytes (if any).
Fixes: ff1e8581 twsi: support more message combinations in transfers
(cherry picked from commit e5268c3d43)
Most prominently, add support for a transfer where a write with no-stop
flag is followed by a write with no-start flag. Logically, it's a
single larger write, but consumers may want to split it like that
because one part can be a register ID and the other part can be data to
be written to (or starting at) that register.
Such a transfer can be created by i2c tool and iic(4) driver, e.g., for
an EEPROM write at specific offset:
i2c -m tr -a 0x50 -d w -w 16 -o 0 -c 8 -v < /dev/random
This should be fixed by new code that handles the end of data transfer
for both reads and writes. It handles two existing conditions and one
new. Namely:
- the last message has been completed -- end of transfer;
- a message has been completed and the next one requires the start
condition;
- a message has been completed and the next one should be sent without
the start condition.
In the last case we simply switch to the next message and start sending
its data. Reads without the start condition are not supported yet,
though. That's because we NACK the last byte of the previous message,
so the device stops sending data. To fix this we will need to add a
look-ahead at the next message when handling the penultimate byte of the
current one.
This change also fixed a bug where msg_idx was not incremented after a
read message. Apparently, typically a read message is a last message in
a transfer, so the bug did not cause much trouble.
PR: 258994
(cherry picked from commit ff1e858180)
Assert that we are not receiving data beyond the requested length.
Assert that we have not NACK-ed incoming data prematurely.
Abort the current transfer if the incoming data is NACK-ed or not
NACK-ed unexpectedly.
Add debug logging of received data to complement logging of sent data.
(cherry picked from commit 00c07d9559)
The write at the end of twsi_intr() already handles all cases, no need
to have another write for TWSI_STATUS_START / TWSI_STATUS_RPTD_START.
(cherry picked from commit aeacf172fd)
Previously the code set TWSI_CONTROL_ACK in twsi_transfer() based on
whether the first message had a length of one. That was done regardless
of whether the message was a read or write and what kind of messages
followed it.
Now the bit is set or cleared while handling TWSI_STATUS_ADDR_R_ACK
state transition based on the current (read) message.
The old code did not correctly work in a scenario where a single byte
was read from an EEPROM device with two byte addressing.
For example:
i2c -m tr -a 0x50 -d r -w 16 -o 0 -c 1 -v
The reason is that the first message (a write) has two bytes, so
TWSI_CONTROL_ACK was set and never cleared.
Since the controller did not send NACK the EEPROM sent more data resulting
in a buffer overrun.
While working on TWSI_STATUS_ADDR_R_ACK I also added support for
the zero-length read access and then I did the same for zero-length write
access.
While rare, those types of I2C transactions are completely valid and are
used by some devices.
PR: 258994
(cherry picked from commit 04622a7f21)
twsi_error() is a new function that stops the current transfer and sets
up softc when an error condition is detected.
TWSI_STATUS_DATA_WR_NACK, TWSI_STATUS_BUS_ERROR and
TWSI_STATUS_ARBITRATION_LOST are now handled explicitly rather than
via the catch-all unknown status.
Also, twsi_intr() now calls wakeup() in a single place when the
transfer is finished.
(cherry picked from commit a4fe892208)
All accesses to softc are now done under a mutex to prevent data races
between the open context and the interrupt handler.
Additionally, the wait time in twsi_transfer is bounded now.
Previously we could get stuck there forever if an interrupt got lost.
(cherry picked from commit 69cfa60ddd)
Debug messages can now be enabled per driver instance via a new sysctl.
Also, debug messages in TWSI_READ and TWSI_WRITE require debug level
greater than 1 as they are mostly redundant because callers of those
functions already log most interesting results.
NB: the twsi drivers call their device iichb, so the new sysctl will
appear under dev.iichb.N.
(cherry picked from commit a2793d6182)
On-board devices should be configured via the FDT and overlays.
Hints are primarily useful for external and temporarily attached devices.
Adding hints is much easier and faster than writing and compiling
an overlay.
(cherry picked from commit 01e3492337)
On-board devices should be configured via the FDT and overlays.
Hints are primarily useful for external and temporarily attached devices.
Adding hints is much easier and faster than writing and compiling
an overlay.
(cherry picked from commit 27645265c4)
On-board devices should be configured via the FDT and overlays.
Hints are primarily useful for external and temporarily attached devices.
Adding hints is much easier and faster than writing and compiling
an overlay.
(cherry picked from commit a75159eabc)
sysctl(8) first queries a sysctl to get a size of its value even if the
sysctl is of a fixed size, e.g. it has an integer type.
Only after that sysctl(8) queries an actual value of the sysctl.
Previosuly the driver would needlessly read a sensor in the first step.
(cherry picked from commit 43b031a371)
Implement kernel support for RFC 5549/8950.
* Relax control plane restrictions and allow specifying IPv6 gateways
for IPv4 routes. This behavior is controlled by the
net.route.rib_route_ipv6_nexthop sysctl (on by default).
* Always pass final destination in ro->ro_dst in ip_forward().
* Use ro->ro_dst to exract packet family inside if_output() routines.
Consistently use RO_GET_FAMILY() macro to handle ro=NULL case.
* Pass extracted family to nd6_resolve() to get the LLE with proper encap.
It leverages recent lltable changes committed in c541bd368f.
Presence of the functionality can be checked using ipv4_rfc5549_support feature(3).
Example usage:
route add -net 192.0.0.0/24 -inet6 fe80::5054:ff:fe14:e319%vtnet0
Differential Revision: https://reviews.freebsd.org/D30398
(cherry picked from commit 62e1a437f3)
during suspend/resume cycle. Previously used bus_generic_suspend_intr and
bus_generic_resume_intr may cause interrupt storm because of missed
interrupt acknowledges caused by blocking of intr handler.
Reported by: J.R. Oldroyd <jr_AT_opal_DOT_com>
(cherry picked from commit 82626fef62)
Commit message of the identical change in Linux driver says:
"When an I2C HID device is powered off during system sleep, as a result
of removing its power resources (by the ACPI core) the interrupt line
might go low as well. This results inadvertent interrupts."
This change fixes suspend/resume on Asus S510UQ laptops.
While here add a couple of typo fixes as well as a slight change to the
iichid_attach() code to have the power_on flag set properly.
Submitted by: J.R. Oldroyd <jr_AT_opal_DOT_com>
Reviewed by: wulf
(cherry picked from commit 5236888db7)
The second set of USB transfer is requested by hkbd(4) and
should improve HID keyboard handling in kdb and panic contexts.
Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D30486
(cherry picked from commit 9aa0e5af75)
This reverts commit aa37baf3d7.
The reverted commit was motivated by a problem observed on stable/12,
but it turns out that a better solution was committed in r348309 but not
MFCed. So, revert this change since it is unnecessary and not really
correct: it assumes that the order in which module metadata records is
defined determines their order in the output linker set. While this
seems to hold in my testing, it is not guaranteed.
Reported by: cem
Discussed with: imp
(cherry picked from commit 519b64e27f)
PNP info definitions currently have an unfortunate requirement in that
they must follow the associated module definition in the module metadata
linker set. Otherwise devmatch can segfault while processing the linker
hints file since kldxref maintains the order in the linker set.
A number of drivers violate this requirement. In some cases this can
cause devmatch(8) to segfault when processing the linker hints file.
Work around the problem for now simply by adjusting the drivers.
Reviewed by: imp
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D28260
Matching table format is compatible with ACPI_ID_PROBE bus method.
Note that while ACPI_ID_PROBE matches against _HID and all _CIDs, current
acpi_pnpinfo_str() exports only _HID and first _CID. That means second
and further _CIDs should be added to both acpi_pnpinfo_str() and
ACPICOMPAT_PNP_INFO if device matching against them is required.
Reviewed by: imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26824
motherboard temperatures. In particular, the U4 northbridge die is very
hard to cool or heat effectively with fans and is not responsive to load.
It generally sits around 64C, where it seems happy, so (like Linux) just
declare that to be its target temperature.
This makes the PowerMac G5 much less loud, with no change in the
temperatures of any system components.
MFC after: 2 weeks
hints work on per-channel basis as documented, rather than chip-wide. Also,
when configured via hints, return BUS_PROBE_NOWILDCARD on successful hints
match, so that the hints don't bogusly match other types of i2c chips.
We don't need to do the busy dance for this driver. It's handled by
destroy_dev() entirely. Since all we did was busy/unbusy in
open/close, just delete them. We therefore don't need to track closes
either.
Reviewed by: ian@
Differential Revision: https://reviews.freebsd.org/D26431
Make that distinction more explicit and regular in the code.
The difference in behavior is documented in the respective datasheets.
Previously, the code handled the distinction by writing the control
register multiple times where at least one write was zero and another
was one.
This can be considered a follow-up to r363021.
Reviewed by: manu
MFC after: 4 weeks
Differential Revision: https://reviews.freebsd.org/D26308
wakeup() does not have any effect on pause(), so if a transfer was
not finished by the time of the first check, then the thread
would sleep full 30 ms.
To do: protect the transfer and interrupt code with the mutex,
switch from tsleep from msleep
Reviewed by: manu
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D26309
