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2021-09-15ptp: ocp: Enable 4th timestamper / PPS generatorJonathan Lemon1-8/+74
A 4th timestamper is added which timestamps the output of the PHC. The clock nanosecond offset is not always zero, so when compared to other timestampers, this provides precise measurements. Also, the timestamper interrupt from the PHC can be used to generate a PPS signal for /dev/pps. Also allow PTP_CLK_REQ_PEROUT requests for a 1PPS output, but do not actually configure any output pins, this is done via sysfs. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add second GNSS deviceJonathan Lemon1-2/+15
Upcoming boards may have a second GNSS receiver, getting information from a different constellation than the first receiver, which provides some measure of anti-spoofing. Expose the sysfs attribute for this device, if detected. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add NMEA outputJonathan Lemon1-2/+55
The timecard can provide a NMEA-1083 ZDA (time and date) output string on a serial port, which can be used to drive other devices. Add the NMEA resources, and the serial port as a sysfs attribute. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add debugfs entry for timecardJonathan Lemon1-0/+233
Provide a view into the timecard internals for debugging. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Separate the init and info logicJonathan Lemon1-36/+60
On startup, parts of the FPGA need to be initialized - break these out into their own functions, separate from the purely informational blocks. On startup, distrbute the UTC:TAI offset from the NMEA GNSS parser, if it is available. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add sysfs attribute utc_tai_offsetJonathan Lemon1-1/+48
IRIG and DCF output time in UTC, but the timecard operates on TAI internally. Add an attribute node which allows adding an offset to these modes before output. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add IRIG-B output mode controlJonathan Lemon1-0/+41
IRIG-B has several different output formats, the timecard defaults to using B007. Add a control which selects different output modes. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add IRIG-B and DCF blocksJonathan Lemon1-0/+129
IRIG (Inter-range Instrumentation Group) timecode format on one of the SMA output channels is provided by the IRIG master FPGA block. Enable the master when the IRIG output format is selected on either one of the output channels. By default, the output is in B007 format. DCF output format is provided by the DCF master block. Also enable the IRIG and DCF slaves, which parse an incoming signal from the external SMA connectors, and may be used to adjust the PHC. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add SMA selector and controlsJonathan Lemon1-28/+361
The latest firmware for the TimeCard adds selectable signals for the SMA input/outputs. Add support for SMA selectors, and the GPIO controls needed for steering signals. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Add third timestamperJonathan Lemon1-2/+17
The firmware may provide a third signal timestamper, so make it available for use. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Report error if resource registration fails.Jonathan Lemon1-1/+5
If a resource could not be registered, report the name of the resource and the error code. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Skip resources with out of range irqsJonathan Lemon1-29/+18
The TimeCard exposes different resources, which may have their own irqs. Space for the irqs is allocated through a MSI or MSI-X interrupt vector. On some platforms, the interrupt allocation fails. Rather than making this fatal, just skip exposing those resources. The main timecard functionality (that of a PTP clock) will work without the additional resources. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Skip I2C flash read when there is no controller.Jonathan Lemon1-2/+5
If an I2C controller isn't present, don't try and read the I2C flash. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: Parameterize the TOD information display.Jonathan Lemon1-1/+2
Only display the TOD information if there is a corresponding TOD resource. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-15ptp: ocp: parameterize the i2c driver usedJonathan Lemon1-4/+21
Move the xilinx i2c driver parameters to the resource block instead of hardcoding things in the registration functions. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-16ptp: ocp: Fix error path for pci_ocp_device_init()Jonathan Lemon1-3/+4
If ptp_ocp_device_init() fails, pci_disable_device() is skipped. Fix the error handling so this case is covered. Update ptp_ocp_remove() so the normal exit path is identical. Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: 773bda964921 ("ptp: ocp: Expose various resources on the timecard.") Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-16ptp: ocp: Fix uninitialized variable warning spotted by clang.Jonathan Lemon1-1/+1
If attempting to flash the firmware with a blob of size 0, the entire write loop is skipped and the uninitialized err is returned. Fix by setting to 0 first. Fixes: 773bda964921 ("ptp: ocp: Expose various resources on the timecard.") Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-09devlink: Set device as early as possibleLeon Romanovsky1-22/+4
All kernel devlink implementations call to devlink_alloc() during initialization routine for specific device which is used later as a parent device for devlink_register(). Such late device assignment causes to the situation which requires us to call to device_register() before setting other parameters, but that call opens devlink to the world and makes accessible for the netlink users. Any attempt to move devlink_register() to be the last call generates the following error due to access to the devlink->dev pointer. [ 8.758862] devlink_nl_param_fill+0x2e8/0xe50 [ 8.760305] devlink_param_notify+0x6d/0x180 [ 8.760435] __devlink_params_register+0x2f1/0x670 [ 8.760558] devlink_params_register+0x1e/0x20 The simple change of API to set devlink device in the devlink_alloc() instead of devlink_register() fixes all this above and ensures that prior to call to devlink_register() everything already set. Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Remove pending_image indicator from devlinkJonathan Lemon1-10/+0
After writing an image blob to the flash memory, a reboot is required to reload the FPGA. There is no versioning prsent in the FPGA image file, so only a running version is available. The 'stored version' was set to 'pending' in order to indicate a reboot was needed. This isn't reliable, as the module could be unloaded/loaded, losing the "reboot needed" indicator. Also, the devlink 'stored version' information is designed to refer to the actual image version. Unfortunately, there is no method to determine the flash image version other than booting it, so remove the devlink stored version setting. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Rename version string shown by devlink.Jonathan Lemon1-2/+2
The TimeCard has two FPGA images in the flash: the actual firmware, and a manufacturing fallback version which is intended to act as a loader in case the flash update failed. Name these "fw" and "loader", which are reflected in devlink: [root@timecard drv]# devlink dev info pci/0000:04:00.0: driver ptp_ocp serial_number fc:c2:3d:2e:d7:c0 versions: running: fw 5 Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Use 'gnss' naming instead of 'gps'Jonathan Lemon1-21/+21
GPS is not the only available positioning system. Use the generic naming of "GNSS" instead. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Remove devlink health and unused parameters.Jonathan Lemon1-80/+0
"devlink health" was used as a way to monitor the GNSS signal status. This isn't really the intended use, and the same functionality can be achived by monitoring the status file. Remove the devlink heath support entirely, and also remove the currently unused devlink parameters. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Add the mapping for the external PPS registers.Jonathan Lemon1-4/+11
There are two PPS blocks: one handles the external PPS signal output, with the other handling the PPS signal input to the internal clock. Add controls for the external PPS block. Rename the fields so they match their function. Add cable_delay to the register definitions. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-06ptp: ocp: Fix the error handling path for the class device.Jonathan Lemon1-1/+1
Move the put_device() call to the error handling path, so the device is released after the .release callback, avoiding a use-after-free. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-04ptp: ocp: Expose various resources on the timecard.Jonathan Lemon1-46/+1341
The OpenCompute timecard driver has additional functionality besides a clock. Make the following resources available: - The external timestamp channels (ts0/ts1) - devlink support for flashing and health reporting - GPS and MAC serial ports - board serial number (obtained from i2c device) Also add watchdog functionality for when GNSS goes into holdover. The resources are collected under a timecard class directory: [jlemon@timecard ~]$ ls -g /sys/class/timecard/ocp1/ total 0 -r--r--r--. 1 root 4096 Aug 3 19:49 available_clock_sources -rw-r--r--. 1 root 4096 Aug 3 19:49 clock_source lrwxrwxrwx. 1 root 0 Aug 3 19:49 device -> ../../../0000:04:00.0/ -r--r--r--. 1 root 4096 Aug 3 19:49 gps_sync lrwxrwxrwx. 1 root 0 Aug 3 19:49 i2c -> ../../xiic-i2c.1024/i2c-2/ drwxr-xr-x. 2 root 0 Aug 3 19:49 power/ lrwxrwxrwx. 1 root 0 Aug 3 19:49 pps -> ../../../../../virtual/pps/pps1/ lrwxrwxrwx. 1 root 0 Aug 3 19:49 ptp -> ../../ptp/ptp2/ -r--r--r--. 1 root 4096 Aug 3 19:49 serialnum lrwxrwxrwx. 1 root 0 Aug 3 19:49 subsystem -> ../../../../../../class/timecard/ lrwxrwxrwx. 1 root 0 Aug 3 19:49 ttyGPS -> ../../tty/ttyS7/ lrwxrwxrwx. 1 root 0 Aug 3 19:49 ttyMAC -> ../../tty/ttyS8/ -rw-r--r--. 1 root 4096 Aug 3 19:39 uevent The labeling is needed at the minimum, in order to tell the serial devices apart. Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-12ptp: ocp: Fix a resource leak in an error handling pathChristophe JAILLET1-1/+3
If an error occurs after a successful 'pci_ioremap_bar()' call, it must be undone by a corresponding 'pci_iounmap()' call, as already done in the remove function. Fixes: a7e1abad13f3 ("ptp: Add clock driver for the OpenCompute TimeCard.") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-12-05ptp: Add clock driver for the OpenCompute TimeCard.Jonathan Lemon1-0/+398
The OpenCompute time card is an atomic clock along with a GPS receiver that provides a Grandmaster clock source for a PTP enabled network. More information is available at http://www.timingcard.com/ Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Link: https://lore.kernel.org/r/20201204035128.2219252-2-jonathan.lemon@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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