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path: root/drivers/staging/greybus/svc.h
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2016-04-25greybus: svc: clean up gb_svc struct for pwrmonDavid Lin
The power rail names and counts are unnecessarily stored in the gb_svc structure once the SVC created, this causes waste of memory usage. This patch removes rail names and rail counts storage from th gb_svc structure. Testing Done: - Validated the readings from /d/greybus/1-svc/pwrmon/* Signed-off-by: David Lin <dtwlin@google.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-04-25greybus: svc: add stub interface-activate functionJohan Hovold
Add message structures (based on the current spec) for the SVC Interface Activate operation, and a stub function that always return the Greybus interface type. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-04-25greybus: svc: add stub functions for v_sys, refclk and uniproJohan Hovold
Add stub functions for v_sys, refclk and unipro resource management. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-04-21greybus: svc: add AP power measurements debugfs supportDavid Lin
This change adds the AP Power Monitor functions to read out all the rails power information monitored by the SVC. Testing Done: - $ cat /d/greybus/1-svc/pwrmon/*/* and validate the output with the svc stub power monitor functions - $ tree /d/greybus/1-svc/pwrmon | | | |---pwrmon | | | | |---DUMMY_RAIL_1 | | | | | |---current_now | | | | | |---power_now | | | | | |---voltage_now | | | | |---DUMMY_RAIL_2 | | | | | |---current_now | | | | | |---power_now | | | | | |---voltage_now | | | | |---DUMMY_RAIL_3 | | | | | |---current_now | | | | | |---power_now | | | | | |---voltage_now | | | | |---DUMMY_RAIL_4 | | | | | |---current_now | | | | | |---power_now | | | | | |---voltage_now Signed-off-by: David Lin <dtwlin@google.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-04-07greybus: svc: add Interface power measurements supportDavid Lin
This change implements the AP Power Monitor functions for obtaining current/voltage/power on a specific rail of an Interface. Testing Done: $ cat /sys/bus/greybus/devices/1-3/current_now 103 $ cat /sys/bus/greybus/devices/1-3/power_now 303 $ cat /sys/bus/greybus/devices/1-3/voltage_now 203 Signed-off-by: David Lin <dtwlin@google.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-04-01greybus: Revert "Added a sysfs entry to power down the SVC"Akash Choudhari
This reverts commit a1d8f2c3856804ed26157104bb203edf4c882a6c.
2016-04-01greybus: Added a sysfs entry to power down the SVCGeorgi Dobrev
Added a sysfs entry called pwr_off. When a "1" is passed to it, it sends a GB_SVC_TYPE_PWR_DOWN command to the SVC, powering it down along with the switch and INA231 chips. Testing Done: Tested on EVT1_5, works. Signed-off-by: Georgi Dobrev <dobrev_georgi@projectara.com>
2016-03-30greybus: interface: move route creation to interface activationJohan Hovold
Creating and destroying a route to an interface is arguably an interface operation and belongs with the interface code. Add new interface_activate and interface_deactivate helpers that will be used to activate and deactivate an interface in the new interface boot sequence. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-03-30greybus: svc: indent CPort flag defines properlyJohan Hovold
Use tabs to indent CPort-flag values. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-03-30greybus: svc: remove bogus interface-reset helperJohan Hovold
Remove unused, bogus interface-reset helper. The interface-reset operation is initiated by the SVC, not the AP. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-03-30greybus: core: fix two container-of macrosJohan Hovold
Fix two greybus container-of macros that used the pointer name for the member. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-03-04greybus: connection: generalise CPortFlags handlingJohan Hovold
Generalise the svc connection-create helper to accept a cport-flags argument and handle the flags in the connection code instead. Note that the camera driver currently manages its data connection directly. We keep E2EFC enabled for now even though it will soon need to be disabled due to some pending firmware updates. Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-26greybus: svc watchdog: allow it to be enabled/disabled from userspaceGreg Kroah-Hartman
Sometimes you want to disable the SVC watchdog without having to patch your kernel, so provide a sysfs file to do this. This can let us do power measurements, and let the firmware developers not go crazy worrying that the kernel is going to reset their chips with no notice. Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-23greybus: svc: add a "watchdog" to check the network healthGreg Kroah-Hartman
Now that we have a svc ping command, let's add a watchdog to call it every so often (1 second at the moment.) If it finds something went wrong, post a stern message to the kernel log and call: start unipro_reset to reset the whole greybus hardware subsystem. Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-21greybus: svc: add ping commandGreg Kroah-Hartman
This implements the SVC "ping" command. It's tiny and simple, but we need something like this in order for us to "know" if all is working well. Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-20greybus: svc: add key event handlingRui Miguel Silva
Add a new input device associated with the SVC to handle key events. This new events are transfer over a new greybus svc operation which is unidirectional. It was selected the KEY_A for representing the KEY_ARA_BUTTON key code. Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-19greybus: svc: store protocol versionJohan Hovold
Store the "negotiated" protocol version to use in the svc state struct instead of the connection struct. The generic concept of a connection version is going away in favour of bundle-class versions. Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2016-01-12greybus: svc: add interface eject operationRui Miguel Silva
Add a new svc operation which will be used to send a request to eject a given interface. Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Reviewed-by: Jeffrey Carlyle <jcarlyle@google.com>
2016-01-08greybus: svc: Replace link config hack with standard operationLaurent Pinchart
The link config operation was a hack only designed to fulfill the camera driver's needs. Now that a standard operation is defined for the same purpose, implement it and remove the hack. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-12-21greybus: svc: Add support for the link config operationLaurent Pinchart
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-12-08greybus: svc: create svc along with host deviceJohan Hovold
Create svc device along with host-device and move the svc-connection to the svc structure. The svc connection is enabled when registering the host device, but as the SVC protocol is currently driven by the SVC, we need to defer registration of the svc device to the connection request handler. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-12-03greybus: core: add bus id to ueventsJohan Hovold
Add the bus id to all greybus uevents. This is needed to identify devices that are being removed (e.g. at hot-unplug). Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-12-02greybus: svc: fix racy hotplug handlingJohan Hovold
Fix racy hotplug handling by serialising all processing of hot-plug and unplug requests using a single-threaded dedicated workqueue. This fixes a reported crash during enumeration when processing multiple events. The current svc implementation does not handle concurrency at all (e.g. no interface list lock or refcounting) so we need to use the big hammer for now. Note that we will eventually want to process events for different interfaces in parallel, but that we'd still need a workqueue in order not to starve other svc requests (e.g. for timesync). Reported-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org> Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-11-25greybus: hd: fix svc-connection handlingJohan Hovold
Create the svc connection when registering the host-device and remove the current svc connection hacks that "upgraded" the svc connection once the endo id and ap interface id was known. Note that the old implementation was partly based on a misunderstanding as it was the remote interface id, rather than the local AP interface id, that used to define a connection (but we also needed the endo_id). The remote interface is no longer needed as static connections, such as the svc connection, are now simply defined by the host-device and host cport id. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-11-25greybus: svc: move endo id and ap interface id to svcJohan Hovold
Move endo_id and AP interface id to the svc device. The endo abstraction is about to be removed, and these attributes are arguable attributes of the svc anyway. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-11-25greybus: svc: register svc device at helloJohan Hovold
Register the svc device upon reception of the HELLO request. The SVC HELLO request contains the endo id and AP interface id, which will be exposed from the svc device rather than the endo. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-11-04greybus: hd: rename host-device structureJohan Hovold
Rename host-device structure gb_host_device to match our other structures. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-10-09greybus: svc: skip setting flags for boot over uniproViresh Kumar
We need to skip setting E2EFC and other flags to the SVC connection create request, for all cports, on an interface that need to boot over unipro, i.e. interfaces required to download firmware. This also adds a FIXME as we need to do it differently for ES3. Tested-by: Eli Sennesh <esennesh@leaflabs.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off by: Eli Sennesh <esennesh@leaflabs.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-09-14greybus: svc: Implement DME peer get/set attributes helpersViresh Kumar
These are required to get/set DME attributes of the modules. This is implemented based on the greybus specifications. Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-09-03greybus: svc: unexport few internal functionsViresh Kumar
There are no external users of these, and probably would never be. Make them static. Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
2015-09-03greybus: svc: No need to return errors from [gb_]svc_connection_destroy()Viresh Kumar
These routines are responsible to destroy a connection that is going away, the return value is of no use. At best, print an error message to show that we got an error. Make their return type void. Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
2015-07-24greybus: svc: remove interface->svc pointerViresh Kumar
Its not updated/used anymore, remove it. Also move back the struct gb_svc to svc.c as its not referenced by external users anymore. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Perry Hung <perry@leaflabs.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-07-22greybus: svc: Add helpers to create AP<->SVC connectionViresh Kumar
SVC connection is required before the AP knows its position on the endo and type of endo. To enable message processing between the AP and SVC at this time, we need a partially initialized connection which can handle these messages. Once the AP receives more information from the SVC, it can discard this partially initialized connection and create a proper one, tied to a bundle and interface. Destroying the partially initialized connection is a bit tricky, as it is required to send a response to svc-hello. That part will be properly fixed separately. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-07-08greybus: svc: save pointer to struct gb_svc in struct gb_interfaceViresh Kumar
Its another special protocol (just like control protocol) and is required to be accessed from other files, lets save a pointer to it in interface structure. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-07-08greybus: svc: SVC is part of greybus coreViresh Kumar
Its an essential part of greybus core and shouldn't be present as a separate module. Make it part of greybus.ko module. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
2015-05-23greybus: introduce SVC protocolAlex Elder
This patch adds support for the Greybus SVC protocol. We may want to rearrange protocol numbers at some point, since this is a pretty fundamental protocol. Note: It has only been compile tested; no SVC CPorts have yet been defined, so this code is not yet exercised. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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