GitHub/LineageOS/android_kernel_motorola_exynos9610.git
9 years agogreybus: es1: separate stopping and deallocating urbs
Johan Hovold [Wed, 4 Nov 2015 17:55:17 +0000 (18:55 +0100)]
greybus: es1: separate stopping and deallocating urbs

Separate stopping and deallocating our in-urbs.

This will facilitate implementing proper host-device life-time management.

Compile-only tested.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: separate stopping and deallocating urbs
Johan Hovold [Wed, 4 Nov 2015 17:55:16 +0000 (18:55 +0100)]
greybus: es2: separate stopping and deallocating urbs

Separate stopping and deallocating our in-urbs.

This will facilitate implementing proper host-device life-time management.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es1: separate urb allocation and submission
Johan Hovold [Wed, 4 Nov 2015 17:55:15 +0000 (18:55 +0100)]
greybus: es1: separate urb allocation and submission

Separate in-urb allocation and submission.

This is needed for the driver-model rework.

Compile-tested only.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: separate urb allocation and submission
Johan Hovold [Wed, 4 Nov 2015 17:55:14 +0000 (18:55 +0100)]
greybus: es2: separate urb allocation and submission

Refactor in-urb submission, and make sure to separate allocation and
submission.

Eventually we'll be submitting the urbs at cport enable rather than at
probe, and this is also needed for the driver-model rework.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: fix endpoint requirement check
Johan Hovold [Wed, 4 Nov 2015 17:55:13 +0000 (18:55 +0100)]
greybus: es2: fix endpoint requirement check

The current es2 implementation only checks for no IN or OUT bulk
endpoints, but still assumes there are precisely NUM_BULKS of each.

Specifically, urbs could be allocated and initialised to default values,
which amounts to bulk urbs being submitted to the control endpoint.

We should be able to handle any number of endpoints, but for now let's
just require NUM_BULKS of each.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: fix use-after-free at disconnect
Johan Hovold [Wed, 4 Nov 2015 17:55:12 +0000 (18:55 +0100)]
greybus: es2: fix use-after-free at disconnect

The interface private data is released as part of host-device removal
and must not be accessed afterwards.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: i2s: Remove deprecated I2S Bridged-PHY Protocol
Mark Greer [Wed, 4 Nov 2015 16:47:22 +0000 (09:47 -0700)]
greybus: i2s: Remove deprecated I2S Bridged-PHY Protocol

The Greybus I2S Bridged-PHY Protocol is deprecated so remove
all support for it from the Greybus code.

CC: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: audio: Remove I2S Bridged-PHY Protcol based audio driver
Mark Greer [Wed, 4 Nov 2015 16:47:21 +0000 (09:47 -0700)]
greybus: audio: Remove I2S Bridged-PHY Protcol based audio driver

The Greybus I2S Bridged-PHY Protocol is now deprecated so remove
the audio driver that is based on it.

CC: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: hd: use common prefix for exported functions
Johan Hovold [Tue, 3 Nov 2015 17:03:25 +0000 (18:03 +0100)]
greybus: hd: use common prefix for exported functions

Rename the exported functions using the common gb_-prefix.

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>
9 years agogreybus: hd: rename host-driver structure
Johan Hovold [Tue, 3 Nov 2015 17:03:24 +0000 (18:03 +0100)]
greybus: hd: rename host-driver structure

Rename host-driver structure to gb_hd_driver to more clearly separate it
from the host-device structure.

Also remove an outdated description of the struct.

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>
9 years agogreybus: hd: rename host-device structure
Johan Hovold [Tue, 3 Nov 2015 17:03:23 +0000 (18:03 +0100)]
greybus: hd: rename host-device structure

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>
9 years agogreybus: create host-device compilation unit
Johan Hovold [Tue, 3 Nov 2015 17:03:22 +0000 (18:03 +0100)]
greybus: create host-device compilation unit

Move everything host-device related to hd.c and hd.h.

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>
9 years agogreybus: remove obsolete comment
Johan Hovold [Tue, 3 Nov 2015 17:03:21 +0000 (18:03 +0100)]
greybus: remove obsolete comment

Remove obsolete comment about the driver model.

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>
9 years agogreybus: endo: fix ida memory leak
Johan Hovold [Tue, 3 Nov 2015 11:11:25 +0000 (12:11 +0100)]
greybus: endo: fix ida memory leak

Fix yet another ida memory leak due to failure to call the destructor.

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>
9 years agogreybus: connection: kill gb_hd_connections_exit
Johan Hovold [Tue, 3 Nov 2015 11:11:26 +0000 (12:11 +0100)]
greybus: connection: kill gb_hd_connections_exit

Connections are destroyed as part of interface tear down. If we fail to
do that properly it's a bug that should be fixed rather than papered
over by a fall-back clean up function.

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>
9 years agogreybus: connection: fix potential null-deref when binding protocol
Johan Hovold [Tue, 3 Nov 2015 11:11:27 +0000 (12:11 +0100)]
greybus: connection: fix potential null-deref when binding protocol

We can have connections without bundles so we must not use the bundle
device for error messages when failing to look up a protocol.

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>
9 years agogreybus: connection: fix potential null-deref in connection create
Johan Hovold [Tue, 3 Nov 2015 11:11:28 +0000 (12:11 +0100)]
greybus: connection: fix potential null-deref in connection create

We allow connections without bundles so we must not use the bundle
device for error messages after binding the protocol.

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>
9 years agogreybus: connection: fix potential null-deref in hd_cport_enable
Johan Hovold [Tue, 3 Nov 2015 11:11:29 +0000 (12:11 +0100)]
greybus: connection: fix potential null-deref in hd_cport_enable

Use parent of host device for error messages as the connections bundle
may be NULL.

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>
9 years agogreybus: connection: use bundle device for bundle error messages
Johan Hovold [Tue, 3 Nov 2015 11:11:30 +0000 (12:11 +0100)]
greybus: connection: use bundle device for bundle error messages

It is safe to use the bundle device for error messages when we know we
have a bundle.

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>
9 years agogreybus: remove unused connection device type
Johan Hovold [Tue, 3 Nov 2015 11:11:31 +0000 (12:11 +0100)]
greybus: remove unused connection device type

The connection device type is no longer used.

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>
9 years agogreybus: remove unused host-device id
Johan Hovold [Tue, 3 Nov 2015 11:11:32 +0000 (12:11 +0100)]
greybus: remove unused host-device id

Remove unused device_id field from host-device structure.

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>
9 years agogreybus: es2: update obsolete bridge-device comments
Johan Hovold [Mon, 2 Nov 2015 10:56:57 +0000 (11:56 +0100)]
greybus: es2: update obsolete bridge-device comments

Update obsolete bridge-device comments to better describe our current
ES2 endpoint layout.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: control: remove unused request handler
Johan Hovold [Mon, 2 Nov 2015 10:56:59 +0000 (11:56 +0100)]
greybus: control: remove unused request handler

Remove request handler for control protocol that makes no sense as we do
not have any incoming control requests defined.

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>
9 years agogreybus: connection: remove unused time-stamp defines
Johan Hovold [Mon, 2 Nov 2015 10:56:58 +0000 (11:56 +0100)]
greybus: connection: remove unused time-stamp defines

Remove unused time-stamp defines, that were left in when the time-stamp
fifo was removed.

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>
9 years agogreybus: audio-pcm: fix use of variable unitialized
Bryan O'Donoghue [Thu, 29 Oct 2015 16:58:29 +0000 (16:58 +0000)]
greybus: audio-pcm: fix use of variable unitialized

Compiling with clang shows that period_elapsed will be used as a branch
conditional unitialized whenever snd_dev->transfer_done <
runtime->period_size. Since stack can grow up/down as we proceed though
the call stack this should be fixed. This patch fixes by explicitly
initalizing period_elapsed to zero.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: fix the placement of arguments to pr_err
Bryan O'Donoghue [Thu, 29 Oct 2015 16:58:24 +0000 (16:58 +0000)]
greybus: manifest: fix the placement of arguments to pr_err

We're one character out here in the placement of the inputs to pr_err().
Later patches show this up when pushing through checkpatch.pl. This patch
fixes by moving the offending variables one character left.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: don't assume just one AP bridge
Alex Elder [Wed, 28 Oct 2015 03:18:41 +0000 (22:18 -0500)]
greybus: es2: don't assume just one AP bridge

Previously we had only one AP bridge connected to the AP.  We will
now have two.  Now that the have moved the logging related symbols
into the AP device, we can stop assuming there's only on of them.

Specifically, rename symbols like "apb1_*" to be just "apb_*",
because the "1" is no longer meaningful.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: move logging dentries into es2 struct
Alex Elder [Wed, 28 Oct 2015 03:18:40 +0000 (22:18 -0500)]
greybus: es2: move logging dentries into es2 struct

Finish moving the logging data structures into the es2 AP data
structure rather than having it be a single global.  This patch
moves the two dentries related to logging.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: move logging fifo into es2 struct
Alex Elder [Wed, 28 Oct 2015 03:18:39 +0000 (22:18 -0500)]
greybus: es2: move logging fifo into es2 struct

Continue moving the logging data structures into the es2 AP data
structure rather than having it be a single global.  This patch
moves the fifo.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: move APB log task into the es2_ap_dev struct
Alex Elder [Wed, 28 Oct 2015 03:18:38 +0000 (22:18 -0500)]
greybus: es2: move APB log task into the es2_ap_dev struct

If an APB has a logging task it is associated with that APB.  Move
the task pointer into the es2_ap_dev structure rather than having it
be a single global.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: rename es2 data structures
Alex Elder [Wed, 28 Oct 2015 03:18:37 +0000 (22:18 -0500)]
greybus: es2: rename es2 data structures

I tried this once before and Greg NAK'd it because at that point the
es2 code was nearly identical to the es1 code.  This is no longer
the case, and we need to diverge further, so I think it's time to go
down that path.

The ap_dev structure changed significantly for ES2 versus ES1 as of
this commit:
    667f8d3 es2.c: create dedicated struct for cport_in and cport_out
Since the structures are no longer the same, they should not have
the same name.

This patch renames three data structures so the "1" is replaced with
a "2", to reflect the Toshiba AP bridge chip revision we are working
with.  The structures are:
    es1_ap_dev -> es2_ap_dev
    es1_cport_in -> es2_cport_in
    es1_cport_out -> es2_cport_out

It changes names of symbols having this type as well.  To finish the
job, all references "ES1" (in comments and in symbol names) have
been switched to use "ES2" instead.

The result is a lot of changes, but they amount to a global search
and replace of "es1" with "es2" (and "ES1" with "ES2"), and the
result has been compile tested.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: use official USB vendor/device id
Greg Kroah-Hartman [Thu, 22 Oct 2015 23:40:41 +0000 (16:40 -0700)]
greybus: es2: use official USB vendor/device id

We now have an officially assigned Google USB device id for the
APBridge, so add in support for it in the es2 driver.  The old entry can
be removed once the firmware has caught up and uses the new number.

We should use the version field to determine ES1/ES2/ES3, but that will
come later, for now, grab anything with this device id.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: db3-platform: get rid of redundant gpio tests
Alex Elder [Thu, 22 Oct 2015 18:03:26 +0000 (13:03 -0500)]
greybus: db3-platform: get rid of redundant gpio tests

In apb_ctrl_get_devtree_data(), the value returned by
of_get_named_gpio() has a redundant test for a negative
return value.  GPIO numbers are non-negative, so this
test is redundant--testing gpio_is_valid() is sufficient.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: db3-platform: Use dev_info for success messages
Viresh Kumar [Thu, 22 Oct 2015 14:36:57 +0000 (20:06 +0530)]
greybus: db3-platform: Use dev_info for success messages

Used dev_err() by mistake, fix it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: db3-platform: fix some typos
Alex Elder [Thu, 22 Oct 2015 13:58:17 +0000 (08:58 -0500)]
greybus: db3-platform: fix some typos

Fix misspelled "mandatory," and use "GPIOs" for the plural form (no
apostrophe and capitalized) in comments.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: db3-platform: fix code that fetches reset GPIO
Alex Elder [Thu, 22 Oct 2015 13:58:16 +0000 (08:58 -0500)]
greybus: db3-platform: fix code that fetches reset GPIO

The code that fetches the reset GPIO for an AP bridge suffers
from an apparent copy/paste error.  Fix it.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: move greybus_endo_setup() to endo.c
Viresh Kumar [Wed, 21 Oct 2015 10:12:44 +0000 (15:42 +0530)]
greybus: endo: move greybus_endo_setup() to endo.c

It belongs to the endo layer and should be placed in endo.c instead. Do
it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: module: fix double freeing of module structure
Viresh Kumar [Wed, 21 Oct 2015 09:56:45 +0000 (15:26 +0530)]
greybus: module: fix double freeing of module structure

The module will be released by gb_module_release() once all references
for the module are dropped. And so there is no need to free it in the
error path specially.

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>
9 years agogreybus: interface: fix double freeing of interface structure
Viresh Kumar [Wed, 21 Oct 2015 09:56:44 +0000 (15:26 +0530)]
greybus: interface: fix double freeing of interface structure

The interface will be released by gb_interface_release() once all
references for the interface are dropped. And so there is no need to
free it in the error path specially.

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>
9 years agogreybus: bundle: fix double freeing of bundle structure
Viresh Kumar [Wed, 21 Oct 2015 09:56:43 +0000 (15:26 +0530)]
greybus: bundle: fix double freeing of bundle structure

The bundle will be released by gb_bundle_release() once all references
for the bundle are dropped. And so there is no need to free it in the
error path specially.

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>
9 years agogreybus: endo: fix device-id allocation
Johan Hovold [Wed, 21 Oct 2015 09:51:43 +0000 (11:51 +0200)]
greybus: endo: fix device-id allocation

During endo registration, a unique device id was allocated but then
never used. Instead the default dev_id 0 (due to kzalloc) was used for
device-generation and later for id-deallocation.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: fix use-after-free in error path
Johan Hovold [Wed, 21 Oct 2015 09:51:42 +0000 (11:51 +0200)]
greybus: endo: fix use-after-free in error path

Fix use-after-free in endo-registration error path by moving the
id-release to the device release function.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: platform: Add platform driver for DB3 AP bridge
Vaibhav Hiremath [Wed, 21 Oct 2015 11:20:20 +0000 (16:50 +0530)]
greybus: platform: Add platform driver for DB3 AP bridge

With DB3, we now have AP as a master as far as AP bridges are concerned.
SVC will talk only to AP and AP will control bridges; unlike other
module interfaces.

So AP supposed to manage/control bridges in all power states including
power on reset.

During power on reset AP should follow below sequence -

Sequence (treated as a Cold Boot)

Stage-1
=======
AP:
 - Power On (Power up from PMIC to AP)
 - AP start booting
   Since power to AP bridges are controlled through gpio, power is gated
   to APB1 & 2
   No ref_clk to APB available (under SVC's control)
 - AP configures USB hub to enable HSIC interface to APB
 - As part of platform driver probe, AP follow below sequence
   - Set the pinctrl in default state
   - Hold APBs in reset by pulling down reset pin
   - Enable power to APB by enabling regulator and switches
   - De-assert (set 'low') 'boot_ret' signal
 - AP will assert (set 'high') the wake_detect signal, triggering
   connect/detect event to the SVC
 - AP waits for wake pulse from SVC

 SVC:
 - Power On (power up from PMIC to SVC)
 - SVC starts booting
 - SVC will de-assert reset signal to unipro switch
   - Switch starts booting
 - SVC confirms switch boot status using SPI (or something)
 - SVC waits for 300 msec (ES2 known issue)
 - SVC waits for detect/connect event from AP

Stage-2
=======
SVC:
 - ON connect/detect event, SVC send back wake pulse (cold boot)
   to AP over wake_detect pin, if SVC boot is completed.

AP:
 - On wake pulse from SVC (for cold boot), AP de-asserts (set high')
   reset signal to APB 1 and/or 2
 - Bridges starts booting
 - Eventually Unipro linkup occurs

Testing:

 - Build tested against Helium kernel
 - Due to unavailability of MSM and DB3 platform, only minimal testing
   has been done.
 - Code has been modified for validation on Helium + SDB platform.
    Mostly dts changes for gpio numbers
    And debug messages to check gpio values
 - On Helium + SDB platform, with addition of debug messages validated
   the sequence.

TODO list:

 - Currently _only_ supports power on sequence (cold boot).
   Both warm and cold boot support. Cold and Warm boot is
   differentiated based on pulse width of wake_detect signal
      >=5 msec = Cold boot else Warm boot
 - No support for Power management
   So the "power-down", "power-off", "wake_in" and "wake_out"
   signals are not explored/implemented.
 - Support for Work thread
    repetitive wake signal if no response from peer
    May required for PM support, as we have delays in the sequences
 - pinctrl states, specially to make sure we enable right pullup or pulldown
   when we set wake_detect pin to input
 - Convert gpio list into an array, and associated xxx-gpio-name property

Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: svc: don't trust any struct devices
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:53:31 +0000 (16:53 -0700)]
greybus: svc: don't trust any struct devices

As the svc code is "odd" in how things are set up at initial connection
time, we can't always "know" that we have a valid bundle to use for
error messages.  So just punt and always use pr_*() calls to ensure that
we never incorrectly dereference a pointer.

This will get fixed up soon, but for now, let's just live with a bit
messier error messages in the log.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: core: remove uevent handling for gb_connection
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:53:46 +0000 (16:53 -0700)]
greybus: core: remove uevent handling for gb_connection

As we are going to be removing the struct device from gb_connection,
there is no need to do anything for uevents for them.  So just remove
the code.  It wasn't doing anything anyway, so no functionality is lost
here at all.

As is_gb_connection() is no longer used, that is also removed in this
patch.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: bundle.h: add a private field to struct gb_bundle
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:54:00 +0000 (16:54 -0700)]
greybus: bundle.h: add a private field to struct gb_bundle

The gb_bundle structure needs a private field if we are going to be able
to replace the gb_connection device with this one for all use cases.

Ideally we could use the private pointer within the struct device, but
for now let's just try to mirror how people were using the gb_connection
structure to make the patches simpler, and the logic the same.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: protocol: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:54:18 +0000 (16:54 -0700)]
greybus: protocol: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the protocol code to use the bundle pointer instead of
the connection pointer when printing out error messages.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: greybus_trace: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:55:29 +0000 (16:55 -0700)]
greybus: greybus_trace: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the greybus trace code to use the bundle pointer
instead of the connection pointer when printing out tracing messages.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: loopback: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:55:46 +0000 (16:55 -0700)]
greybus: loopback: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the loopback driver to use the bundle pointer instead
of the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: connection: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:56:23 +0000 (16:56 -0700)]
greybus: connection: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the connection code to use the bundle pointer instead
of the connection pointer for some error messages.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: connection: remove 'struct device' from 'struct gb_connection'
Greg Kroah-Hartman [Fri, 16 Oct 2015 23:56:38 +0000 (16:56 -0700)]
greybus: connection: remove 'struct device' from 'struct gb_connection'

We don't want this in the driver core, as nothing will be binding to it,
that's the job of a bundle.  So remove the struct device and use a kref
to handle reference counting instead.

Note, I don't think we really need a kref, but it keeps the lifetime the
same as before, and is the simplest change for now.  In the future it
might be easier to just attach all connections to the bundle and clean
them up when the bundle is removed.

Also remove the cport sysfs documentation as it's no longer relevant.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
9 years agogreybus: sdio: some cleanups in command function
Rui Miguel Silva [Thu, 15 Oct 2015 22:56:52 +0000 (23:56 +0100)]
greybus: sdio: some cleanups in command function

Some cleanups in gb_sdio_command function, ret does not need to be
initialize and mrq is already pointing to request, no need to get it
from host.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: send data block details at command request
Rui Miguel Silva [Thu, 15 Oct 2015 22:56:51 +0000 (23:56 +0100)]
greybus: sdio: send data block details at command request

If SDIO request include data to be transfer send details (data blocks
and block size) in command request, as it seems some controllers need
this info prior to set the registers correctly.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: loopback: capture and present firmware supplied latencies
Bryan O'Donoghue [Thu, 15 Oct 2015 15:10:45 +0000 (16:10 +0100)]
greybus: loopback: capture and present firmware supplied latencies

In order to provide deep inspection of the greybus/UniPro system
instrumentation of

1. APBridge's view of UniPro latency
2. GPBridge's view of internal firmware-only latency

have both been added and reported to the AP in the transfer loopback
response header. When this data are present we latch and average it over
the number of requested cycles, presenting it to user-space via sysfs.

This patch adds the following sysfs entries for each loopback CPort

- apbridge_unipro_latency_avg_con
- apbridge_unipro_latency_max_con
- apbridge_unipro_latency_min_con
- gpbridge_firmware_latency_avg_con
- gpbridge_firmware_latency_max_con
- gpbridge_firmware_latency_min_con

and the following sysfs entries representing the average values across all
available CPorts

- apbridge_unipro_latency_avg_dev
- apbridge_unipro_latency_max_dev
- apbridge_unipro_latency_min_dev
- gpbridge_firmware_latency_avg_dev
- gpbridge_firmware_latency_max_dev
- gpbridge_firmware_latency_min_dev

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: loopback: add tracker variables to hold firmware timestamps
Bryan O'Donoghue [Thu, 15 Oct 2015 15:10:44 +0000 (16:10 +0100)]
greybus: loopback: add tracker variables to hold firmware timestamps

This patch adds tracker variables to hold the incoming firmware derived
timestamps where apbridge_latency_ts will contain the APBridge's view of
the UniPro turn-around time and gpbridge_latency_ts will contain the
GPBridge's view of it's own internal latency. Both values are reported
in microseconds.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: loopback: send command to APBridge to tag throughput
Bryan O'Donoghue [Thu, 15 Oct 2015 15:10:43 +0000 (16:10 +0100)]
greybus: loopback: send command to APBridge to tag throughput

A USB vendor command has been added to APBridge to allow for tagging of
specific CPort identifiers with internal timing data, specifically geared
towards capturing and understanding latencies in the UniPro fabric. This
patch sends a command to APBridge for each known loopback CPort to tag data
as appropriate. Subsequent patches will present this data to user-space for
ongoing integration analysis.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: add latency tag enable/disable callbacks
Bryan O'Donoghue [Thu, 15 Oct 2015 15:10:42 +0000 (16:10 +0100)]
greybus: connection: add latency tag enable/disable callbacks

This patch adds a layered wrapper around optional latency tag
enable/disable commands to APBridge. When set APBridge and GPBridge will
insert timing information into reserved fields in the loopback response
header. Correspondingly when unset no timing information will be included
in the response payload.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es1,es2: add USB vendor command to timestamp
Bryan O'Donoghue [Thu, 15 Oct 2015 15:10:41 +0000 (16:10 +0100)]
greybus: es1,es2: add USB vendor command to timestamp

As part of an effort to get deep inspection of latencies throughout the
greybus network including HSIC, UniPro and firmware incurred latencies a
new command to the APBridge to tag a known offset with timestamping data
has been introduced. This patch adds that code to the es1 and es2 drivers.

- latency_tag_enable
- latency_tag_disable

Respectively send the enable/disable command to APBridge on a per-CPort
basis. This allows only specified cports to have timestamping data added by
APBridge, leaving any CPort not specifically enabled untouched.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: raw: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:31:00 +0000 (11:31 -0700)]
greybus: raw: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the raw driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: control: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:22:39 +0000 (11:22 -0700)]
greybus: control: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the control code to use the bundle pointer instead
of the connection pointer for printing out error messages.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: operation: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:21:06 +0000 (11:21 -0700)]
greybus: operation: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the operation code to use to use the bundle pointer
instead of the connection pointer when printing out error messages.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: usb: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:20:00 +0000 (11:20 -0700)]
greybus: usb: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the usb driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: sdio: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:19:42 +0000 (11:19 -0700)]
greybus: sdio: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the sdio driver to use the bundle pointer instead of
the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: light : use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:19:09 +0000 (11:19 -0700)]
greybus: light : use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the light driver to use the bundle pointer instead of
the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: pwm: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:18:50 +0000 (11:18 -0700)]
greybus: pwm: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the pwm driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: i2c: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:18:32 +0000 (11:18 -0700)]
greybus: i2c: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the i2c driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: gpio: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:17:55 +0000 (11:17 -0700)]
greybus: gpio: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the gpio driver to use the bundle pointer instead of
the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: firmware: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:17:29 +0000 (11:17 -0700)]
greybus: firmware: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the firmware driver to use the bundle pointer instead
of the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: audio: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:16:49 +0000 (11:16 -0700)]
greybus: audio: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the audio driver to use the bundle pointer instead of
the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: hid: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:16:24 +0000 (11:16 -0700)]
greybus: hid: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the hid driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: spi: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:15:38 +0000 (11:15 -0700)]
greybus: spi: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the spi driver to use the bundle pointer instead of the
connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: uart: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:15:12 +0000 (11:15 -0700)]
greybus: uart: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the uart driver to use the bundle pointer instead of
the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: vibrator: use the bundle struct device instead of the connector
Greg Kroah-Hartman [Wed, 14 Oct 2015 18:12:06 +0000 (11:12 -0700)]
greybus: vibrator: use the bundle struct device instead of the connector

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the vibrator driver to use the bundle pointer instead
of the connection pointer.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agogreybus: loopback: add reserved fields to track firmware latencies
Bryan O'Donoghue [Mon, 12 Oct 2015 14:45:05 +0000 (15:45 +0100)]
greybus: loopback: add reserved fields to track firmware latencies

The greybus specification has been extended to include two new reserved
fields, which the implementation is using to track internal firmware
latencies. This change adds the appropriate fields to the corresponding
kernel header.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: handle set_irq_flags api change
Johan Hovold [Tue, 13 Oct 2015 09:27:58 +0000 (11:27 +0200)]
greybus: gpio: handle set_irq_flags api change

The ARM-specific set_irq_flags helper has been removed in 4.3. Instead
of doing conditional compilation on the kernel version to avoid build
breakages, simply use the genirq interface directly.

Suggested-by: Rob Herring <rob.herring@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: build: add pwm to config options to enable
Johan Hovold [Tue, 13 Oct 2015 17:10:30 +0000 (19:10 +0200)]
greybus: build: add pwm to config options to enable

Add PWM to the kernel config options that shall be enabled.

When PWM is not enabled connection init will fail with

greybus endo0:3:4:9:9: failed to register PWM: -22

when using the default manifest.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: remove duplicate protocol lookup error message
Johan Hovold [Tue, 13 Oct 2015 17:10:29 +0000 (19:10 +0200)]
greybus: connection: remove duplicate protocol lookup error message

Remove duplicate protocol lookup error message, which has already been
logged.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: protocol: make protocol-lookup error message more informative
Johan Hovold [Tue, 13 Oct 2015 17:10:28 +0000 (19:10 +0200)]
greybus: protocol: make protocol-lookup error message more informative

Make protocol lookup error more informative, by moving it to
gb_connection_bind_protocol and using dev_err.

Also make sure to use hex format for the protocol id as that is what is
used everywhere else.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: vibrator: add missing protocol-register error handling
Johan Hovold [Tue, 13 Oct 2015 17:10:27 +0000 (19:10 +0200)]
greybus: vibrator: add missing protocol-register error handling

Add missing error handling when registering the vibrator protocol during
module init.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: protocol: make version debug message more informative
Johan Hovold [Tue, 13 Oct 2015 17:10:26 +0000 (19:10 +0200)]
greybus: protocol: make version debug message more informative

Include function, protocol name and id when printing the version
response debug message.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: protocol: warn on protocol put errors
Johan Hovold [Tue, 13 Oct 2015 17:10:25 +0000 (19:10 +0200)]
greybus: protocol: warn on protocol put errors

Issue a warning if we fail to look up a protocol when dropping a
reference.

This should never happen as we hold a reference to the protocol module
and protocols should only be deregistered at module unload.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: protocol: warn on bad deregistration
Johan Hovold [Tue, 13 Oct 2015 17:10:24 +0000 (19:10 +0200)]
greybus: protocol: warn on bad deregistration

A protocol should be deregistered exactly once when the protocol module
is being unloaded. This means that protocol deregister will never be
called with active users as we take a module reference when looking up a
protocol.

Remove comment suggesting that we could one day forcefully stop a user
of a protocol, and issue a big warning if a protocol is deregistered
more than once or at some other time than during module unload (e.g.
with active users).

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: operation: clean up error messages
Johan Hovold [Tue, 13 Oct 2015 17:10:23 +0000 (19:10 +0200)]
greybus: operation: clean up error messages

Clean up and improve error messages.

Demote a warning message to warning level.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: operation: drop OOM-response FIXME
Johan Hovold [Tue, 13 Oct 2015 17:10:22 +0000 (19:10 +0200)]
greybus: operation: drop OOM-response FIXME

Drop FIXME about sending responses in OOM situations.

If we fail to allocate an operation for an incoming request, we have
bigger problems than to worry about sending a response.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: replace pr_err with dev_err
Johan Hovold [Tue, 13 Oct 2015 17:10:21 +0000 (19:10 +0200)]
greybus: connection: replace pr_err with dev_err

Replace a couple of pr_err with more informative dev_err and clean up
the messages somewhat.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es1/es2: clean up error messages
Johan Hovold [Tue, 13 Oct 2015 17:10:20 +0000 (19:10 +0200)]
greybus: es1/es2: clean up error messages

Replace the remaining pr_err with dev_err, and drop redundant function
prefixes.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: destroy connection on failing to bind it
Fabien Parent [Tue, 13 Oct 2015 15:34:51 +0000 (17:34 +0200)]
greybus: connection: destroy connection on failing to bind it

gb_connection_bind_protocol() returns proper error codes now and we
should destroy the connection on failures.

This change also fixes a NULL deref on hotplug when the control connection fails
to initialize.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2: implement cport reset control request
Fabien Parent [Tue, 13 Oct 2015 15:34:50 +0000 (17:34 +0200)]
greybus: es2: implement cport reset control request

Toshiba UniPro IP requires to reset the CPort that has been used in a previous
connection. This commit implement a new control request in order to
reset CPorts on an APBridgeA.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: clarify operator precedence
Rui Miguel Silva [Thu, 8 Oct 2015 11:10:54 +0000 (12:10 +0100)]
greybus: sdio: clarify operator precedence

When translating capabilities from greybus to mmc values add some
parentheses to clarify operation precedence and avoid static analyses
warnings.

[sdio.c:81]: (style) Clarify calculation precedence for '&' and '?'

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: convert greybus ocr values to mmc ones
Rui Miguel Silva [Thu, 8 Oct 2015 11:10:53 +0000 (12:10 +0100)]
greybus: sdio: convert greybus ocr values to mmc ones

It was missing the translation between the ocr vdd values of greybus to
mmc_core values. This would make the detection of range voltage fail.

mmc: host doesn't support card's voltages

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: fix card removable detection
Rui Miguel Silva [Thu, 8 Oct 2015 11:10:52 +0000 (12:10 +0100)]
greybus: sdio: fix card removable detection

In kernel versions bellow 3.15, the mmc_card_is_removable helper
function has an extra check used for a suspend/resume hack. This made
the gd_sdio_process_event to behave badly handling the module card
insert event in that versions.

So, just test bit the flag that we need, instead of using the helper
function. This way will work in all kernel versions.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: add field to get_caps response
Rui Miguel Silva [Thu, 8 Oct 2015 11:10:51 +0000 (12:10 +0100)]
greybus: sdio: add field to get_caps response

Frequency maximum and minimum are needed to complete the configuration
of the controller. Add them to get_caps response operation.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: svc: skip setting flags for boot over unipro
Viresh Kumar [Wed, 7 Oct 2015 19:40:24 +0000 (15:40 -0400)]
greybus: svc: skip setting flags for boot over unipro

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>
9 years agogreybus: build: android: fix strip module build step
Michael Scott [Mon, 5 Oct 2015 19:33:04 +0000 (12:33 -0700)]
greybus: build: android: fix strip module build step

Currently, the greybus module .ko files are quite large and the
following error was observed during Android build for each greybus module:
strip: Unable to recognise the format of the input file `<module>`

Fix the strip build step by replacing the undefined KERNEL_TOOLCHAIN_PATH
variable with the GREYBUS_CC_PREFIX variable.  Also used as the
CROSS_COMPILER value for the module make.

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: build: android: replace Linaro build specific logic with AOSP equivalents
Michael Scott [Fri, 2 Oct 2015 19:05:33 +0000 (12:05 -0700)]
greybus: build: android: replace Linaro build specific logic with AOSP equivalents

When using greybus build in a different Android setup, it was noted that
several portions of this makefile rely on Linaro specific build items.
Replace these with more generic build steps.

- ANDROID_64 is only defined by Linaro build tasks, use TARGET_ARCH to
  establish ARCH= parameter for greybus build
- KERNEL_TOOLS_PREFIX is only defined by Linaro build tasks.  AOSP has
  a near equivalent variable: TARGET_TOOLS_PREFIX
- build-greybus was dependant on subtask: android_kernel a task defined
  only by Linaro build tasks.  Replace with a generic dependancy to
  the kernel binary located in $OUT (INSTALLED_KERNEL_TARGET).
  End result is the same: kernel must be built before greybus modules

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: fix generic_handle_irq_desc api change
Rui Miguel Silva [Wed, 30 Sep 2015 10:11:57 +0000 (11:11 +0100)]
greybus: gpio: fix generic_handle_irq_desc api change

The generic_handle_irq_desc api only have changed in 4.3.0, so check
against the correct version, if not will break builds for 4.2.x.

Fixes: e7895cfc476 ("gpio: handle api change in generic_handle_irq_desc()")
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>
9 years agogreybus: gpio: handle api change in generic_handle_irq_desc()
Greg Kroah-Hartman [Tue, 29 Sep 2015 18:39:17 +0000 (20:39 +0200)]
greybus: gpio: handle api change in generic_handle_irq_desc()

generic_handle_irq_desc changed the api in the 4.2 kernel, so fix up the
gpio driver to handle this properly to keep it working.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: operation: remove gb_operation_destroy
Johan Hovold [Sun, 27 Sep 2015 00:59:15 +0000 (17:59 -0700)]
greybus: operation: remove gb_operation_destroy

Remove legacy interface to "destroy" operations, which is now just a
wrapper for gb_operation_put.

The old interface name hides the fact that all operations are refcounted
and may live on even after having "destroyed" them.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es1/2: fix use-after-free in completion callback
Johan Hovold [Sat, 26 Sep 2015 21:37:59 +0000 (14:37 -0700)]
greybus: es1/2: fix use-after-free in completion callback

Reset the hcpriv field before returning the message to greybus core in
the OUT-URB completion callback.

This fixes a use-after-free bug when sending responses to incoming
requests as the final reference is then dropped when the message is
returned.

Reported-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: firmware: Don't send control-disconnected event for firmware protocol
Viresh Kumar [Wed, 23 Sep 2015 23:48:13 +0000 (16:48 -0700)]
greybus: firmware: Don't send control-disconnected event for firmware protocol

After downloading the firmware for the next boot stage, module's
firmware (for current boot stage) jumps into it and the new firmware and
sends hotplug request to SVC. On hotplug request from the SVC, the AP
first removes the existing interface.

At this time, there is no point sending disconnected event for the
firmware protocol, for the firmware used in previous stage, as the new
firmware wouldn't be aware about it.

Set flags for firmware protocol to skip control-disconnected operations.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>