Remove overly defensive argument verification in gpio-chip callbacks. We
should trust gpiolib to get this right (or we would not even get any
callback) just like the other gpio drivers do.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Thu, 19 Mar 2015 15:46:18 +0000 (16:46 +0100)]
greybus: operation: use dev_err in gb_operation_sync
Use the more informative dev_err in gb_operation_sync, which includes
the connection device name in the error message (which in turn encodes
the module, interface, bundle and cport ids).
Add missing braces to conditional-construct branches while at it.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Thu, 19 Mar 2015 15:46:17 +0000 (16:46 +0100)]
greybus: connection: replace custom error function with dev_err
Remove custom connection error function and replace it with dev_err.
The standard error function provides more information in the message
prefix (e.g. includes the interface id), has a well-known semantics
(e.g. does does not add newlines to messages), and is even somewhat
shorter to type.
Note that some uses of the custom function were already adding double
newlines due to the non-standard semantics.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Thu, 19 Mar 2015 15:46:14 +0000 (16:46 +0100)]
greybus: ap: fix svc handshake protocol check
Fix incorrect SVC handshake protocol check, which would only bail out if
both major and minor protocol versions supported by the SVC differed.
Since we currently only support one version of the protocol, upgrade the
debug message to warning and bail unless the protocol versions match
perfectly for now.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Tue, 17 Mar 2015 09:55:52 +0000 (10:55 +0100)]
greybus: connection: fix oops after failed init
Make sure not to call connection_exit for connections that have never
been initialised (e.g. due to failure to init).
This fixes oopses due to null-dereferences and use-after-free in
connection_exit callbacks (e.g. trying to remove a gpio-chip that has
never been added) when the bundle and interface are ultimately
destroyed.
Johan Hovold [Mon, 2 Mar 2015 08:55:26 +0000 (09:55 +0100)]
greybus: connection: fix locking in gb_hd_connection_find
Fix unconditional re-enabling of interrupts in gb_hd_connection_find,
which can be called with local interrupts disabled from the USB
completion handler.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
When it receive an interrupt, the function gb_gpio_request_recv doesn't
use the good gpio number to get the irq number. Then, the expected irq is never fired.
Johan Hovold [Mon, 2 Mar 2015 11:34:40 +0000 (12:34 +0100)]
greybus: operation: fix locking issues
Fix unconditional re-enabling of interrupts in various operation
functions that can all be called with local interrupts disabled from USB
completion handlers.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Fri, 13 Feb 2015 06:58:04 +0000 (14:58 +0800)]
greybus: gpio: fix memory leaks at init and exit
Fix three related memory leaks in the init an exit callbacks, where the
gpio-lines array was never freed at all and the controller data wasn't
freed in the init error path.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Matt Porter [Tue, 17 Feb 2015 15:48:23 +0000 (10:48 -0500)]
greybus: gpio: add interrupt handling support
Adds gpio interrupt handling support using an irqchip/irqdomain
instantiation inside the GB GPIO driver. This implementation works
on older kernels such as 3.10 that do not have the gpiolib irqchip
helpers. Any line on a Greybus gpiochip may be configured as an
interrupt. Once configured, IRQ event messages received from a
module fire off the registered interrupt handler.
Signed-off-by: Matt Porter <mporter@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Johan Hovold [Fri, 13 Feb 2015 03:28:09 +0000 (11:28 +0800)]
greybus: bundle: fix sleep-while-atomic in gb_bundle_destroy
Make sure to release the spin lock protecting the interface bundle lists
before tearing down the connections and removing the bundle device,
which are operations that may sleep.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: es1.c: wait until the last possible minute to start the svc messages
When initializing the USB device, we were starting up the svc message
queue before the cport urbs were allocated. This might not be an issue
for "slower" machines, but not having any allocated urbs for a cport
might be an issue if we were to handle svc messages.
So wait until everything is properly initialized and allocated before
starting the svc urb.
SVC messages come in in an "order", so don't mess them up by processing
them out of order. Fix this by making our work queue ordered, which
should keep everything in line.
Reported-by: Perry Hung <perry@leaflabs.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Viresh Kumar [Thu, 22 Jan 2015 06:40:38 +0000 (12:10 +0530)]
greybus: i2c: fix name conflict between function and struct: gb_i2c_transfer_request
'gb_i2c_transfer_request' is the name given to a function and a struct. Though
we don't get any compilation errors/warnings about it, but the names should be
unique.
Viresh Kumar [Thu, 22 Jan 2015 07:12:39 +0000 (12:42 +0530)]
greybus: i2c: fix name conflict between function and struct: gb_i2c_transfer_response
'gb_i2c_transfer_response' is the name given to a function and a struct. Though
we don't get any compilation errors/warnings about it, but the names should be
unique.
Alexandre Bailon [Thu, 22 Jan 2015 07:23:37 +0000 (15:23 +0800)]
greybus: protocol.c: fix a kernel panic caused by __gb_protocol_register
__gb_protocol_register check if the protocol is not already registred,
and then register it. It register in existing->lists but at this point,
existing is always NULL (we exist just before if not).
Use gb_protocols instead.
Viresh Kumar [Wed, 21 Jan 2015 10:40:41 +0000 (16:10 +0530)]
greybus: Remove "gb-" prefix from .c files
Some files are still prefixed with "gb-" with the reasoning that the modules
would be named so, i.e. gb-*.ko. But this can be done by playing a bit in
Makefile instead and keep uniform naming of .c files.
Viresh Kumar [Wed, 21 Jan 2015 10:40:40 +0000 (16:10 +0530)]
greybus: Remove "-gb" suffix from .c files
Some files are prefixed with "gb-" and some are suffixed with "-gb". The
rationale behind the first one is that the modules would be named so, i.e.
gb-*.ko. But there is no reason to keep the "-gb" suffix in the second case.
Rui Miguel Silva [Tue, 20 Jan 2015 16:38:44 +0000 (16:38 +0000)]
greybus: es1: release urb on error path
if error is return when submiting the urb, we need to make sure to release the
urb from the pool, or from the dinamicly allocated. As in it, factor out the free
code and create the free_urb function.
Signed-off-by: Rui Miguel Silva <rmfrfs@gmail.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Perry Hung [Wed, 14 Jan 2015 21:19:26 +0000 (16:19 -0500)]
greybus: gb_operation: replace timeout workqueue
If an operation is issued and the response never comes back,
gb_operation_timeout() cancels the operation but never wakes up the
waiter in gb_operation_request_send().
This patch removes the timeout workqueue and changes the request wait to
wait_for_completion_interruptible_timeout(), with timeout set to
OPERATION_TIMEOUT_DEFAULT.
Signed-off-by: Perry Hung <perry@leaflabs.com> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: Move the es1_ap_desc.c file to Documentation directory
This .c file isn't needed by the kernel driver, it's there for firmware
developers only, so just move it into the Documentation directory to
reduce confusion.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
Alexandre Bailon [Wed, 14 Jan 2015 09:23:49 +0000 (10:23 +0100)]
greybus: i2c-gb: fix bad message size in gb_i2c
The data_in_size variable was set to 1 for the status byte.
But now, the status byte has move to header. Then, the status byte
is "allocated" twice and cause bad message size error.
greybus: sysfs: put a \n at the end of all sysfs files
Right now some sysfs attributes have \n and some do not, so fix that and
put \n at the end of all of them to make it easier to parse things
properly in userspace.
We want to be able to "blame" a protocol for things at times, so give
them a name we can refer to them by. Announce when they are added or
removed from the system so we have a chance to know what is going on
in the kernel logs.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
greybus: module: get rid of global list of modules
Use the list that the driver core keeps of our structure, no need to
duplicate it with a local list as well. This gets rid of a static lock
too, always a nice thing to do.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
This bundles together the existing GP Bridged PHY protocols that were
part of the Greybus core: USB, UART, SDIO, PWM, and GPIO. This is now a
stand-alone kernel module. More logic will be moving here in the future
to handle bridged devices.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
greybus: vibrator-gb: move vibrator protocol to a stand-alone module.
We can't use the gb_protocol_driver() macro here as we need to do some
init and exit logic when loading and removing, so "open code" the module
init and exit functions.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
greybus: protocol: add a module owner to a protocol
Now that protocols can be in a module, we need to reference count them
to lock them into memory so they can't be removed while in use. So add
a module owner structure, and have it automatically be assigned when
registering the protocol.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
greybus: i2c-gb: split out into a stand-alone kernel module.
This splits the i2c-gb protocol into a stand-alone kernel module.
It's not going to stay in this fashion for long, this was done to test
the "can a protcol be loaded later" logic. Future refactoring is going
to move the gpbridge protocols to a separate kernel module, where this
protocol is going to live.
But for now, split it out, it is good to test with, and shows a bug in
gbsim at the moment.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: protocol: split binding of prototcols to connections out of init
When adding a new protocol to the system, walk all bundles and try to
hook up any connections that do not have a protocol already. This sets
the stage to allow for protocols to be loaded at any time, not just
before the device is seen in the system.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: protocol: switch gb_protocol_register() to return an int
We will want to return this value as a return value for module_init()
and bool does not play well with module_init(). So make it a "real"
error value and return int and fix up all callers of the function.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: interface: remove global manifest_descs list
The list was global and had no locking. It's not like we were ever
parsing more than one manifest at the same time right now, but we might
in the future. And we really want this to be local to the interface
itself, for future work redoing how to bind protocols to bundles, so
move the list to the interface structure.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Modules in the greybus system sit above the interface, so insert them
early in the sysfs tree. We dynamically create them when we have an
interface that references a module, as we don't get a "module create"
message directly. They also dynamically go away when the last interface
associated with a module is removed.
Naming scheme for modules/interfaces/bundles/connections is bumped up by
one ':', and now looks like the following:
We still have some "confusion" about interface ids and module ids, which
will be cleaned up later when the svc control protocol changes die down,
right now we just name a module after the interface as we don't have any
modules that have multiple interfaces in our systems.
This is really a list of interfaces, not modules, so rename it so that
we don't get confused when we really do add modules to the whole system
later on.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
It's a lot of renaming, some structures got renamed and also some
fields, but the goal was to rename things to make sense with the new
naming of how the system is put together in the 'driver model' view.
Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
greybus: es1-ap-usb: don't protest when getting -EPROTO USB errors
-EPROTO happens when devices are starting to go away in a system, or
there is something wrong on the USB connection. Either way, it's safe
to resubmit the urb for this error, don't complain to userspace about
this, as the user will see this for every device removed, which looks
scary, but means nothing.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
greybus: bundle: rename interface.[c|h] to bundle.[c|h]
We are renameing the "interface" term to "bundle" so rename the files
before we start changing structure names to make it easier for people to
see what really is happening in the changes.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>
projects / karo-tx-linux.git / log