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9 years agogreybus: kernel_ver: add sg copy operations for kernel < 3.11
Rui Miguel Silva [Wed, 24 Jun 2015 22:20:27 +0000 (23:20 +0100)]
greybus: kernel_ver: add sg copy operations for kernel < 3.11

For older kernel, < 3.11, no copy to/from buffer with skip support was
defined. This could break builds for this versions of kernel.
Add them here.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Tested-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: fix defines for older kernels
Rui Miguel Silva [Wed, 24 Jun 2015 22:20:26 +0000 (23:20 +0100)]
greybus: sdio: fix defines for older kernels

Some of the options for mmc host, are not defined in older kernels.
MMC_CAP2_HS400_1_2V, MMC_CAP2_HS400_1_8V, MMC_TIMING_MMC_DDR52 and
MMC_TIMING_MMC_HS400.

To not use them for older versions.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Tested-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: control: Warn if non-control cport/bundles have control protocol/classes
Viresh Kumar [Mon, 22 Jun 2015 11:12:30 +0000 (16:42 +0530)]
greybus: control: Warn if non-control cport/bundles have control protocol/classes

It is possible that (by mistake) the manifest contains non-control
cports with their protocol set as control-protocol or non-control bundle
with their class set as control-class.

Catch such cases, WARN for them and finally ignore them.

Also WARN if the control cport doesn't have its protocol as
control-protocol and control bundle doesn't have its class as
control-class.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: send [dis]connected events over control CPort
Viresh Kumar [Mon, 22 Jun 2015 11:12:29 +0000 (16:42 +0530)]
greybus: connection: send [dis]connected events over control CPort

The AP needs to send connected and disconnection events to all
interfaces, before a CPort (other than control CPort) can be used.

For now do it which we initialize the connection, but it should be moved
to operations code later.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: hotplug function doesn't need to contain manifest now
Viresh Kumar [Mon, 22 Jun 2015 11:12:28 +0000 (16:42 +0530)]
greybus: hotplug function doesn't need to contain manifest now

Manifest is fetched with control protocol now and so we don't need space
for it in hotplug data.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: interface: Get manifest using Control protocol
Viresh Kumar [Mon, 22 Jun 2015 11:12:27 +0000 (16:42 +0530)]
greybus: interface: Get manifest using Control protocol

Control protocol is ready to be used for fetching manifest. Lets do it.

This changes few things:
- Creates/initializes bundle/connection for control protocol initially
  and skips doing the same later.
- Manifest is parsed at link-up now, instead of hotplug which was the
  case earlier. This is because we need device_id (provided during
  link-up) for registering bundle.
- Manifest is fetched using control protocol.

So the sequence of events is:

Event                 Previously       Now
-----                 ----------       ---
Interface Hotplug     create intf      create intf
                      parse mfst

Interface Link Up     init bundles     create control conn
                                       get mfst size
                                       get mfst
                                       parse mfst
                                       init bundles

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Add control protocol support
Viresh Kumar [Mon, 22 Jun 2015 11:12:26 +0000 (16:42 +0530)]
greybus: Add control protocol support

Add control protocol driver that is responsible for handling operations
on control CPort. The AP also needs to support incoming requests on its
control port. Features not implemented yet are marked as TODO for now.

NOTE: This also fixes cport-bundle-id to 0 and cport-id to 2 for control
protocol.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: Allow bundles/connections list to be non-empty at manifest parsing
Viresh Kumar [Mon, 22 Jun 2015 11:06:47 +0000 (16:36 +0530)]
greybus: manifest: Allow bundles/connections list to be non-empty at manifest parsing

A connection and a bundle will be created for interfaces at the very
beginning for control protocol's functioning. And so the list of bundles
and connections for a interface will be non-empty by the time manifest
is parsed.

Currently we are firing a WARN when these lists are found to be
non-empty. Lets fix that to contain single bundle and connection for
control protocol.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: sdio: extend sdio implementation
Rui Miguel Silva [Mon, 22 Jun 2015 13:03:52 +0000 (14:03 +0100)]
greybus: sdio: extend sdio implementation

Extend sdio implementation, as it for now it was basically stubs.

This implementation is compile tested only since there is no fw or
simulation support yet.
Next step is to add sdio support to gbsim and test it with success
using the mmc_test facility.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: makefile: add MMC to the required option list
Rui Miguel Silva [Mon, 22 Jun 2015 13:03:51 +0000 (14:03 +0100)]
greybus: makefile: add MMC to the required option list

Add MMC to the list of options that shall be enable.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Fix sparse warning
Bryan O'Donoghue [Thu, 18 Jun 2015 15:41:58 +0000 (16:41 +0100)]
greybus: uart: Fix sparse warning

Greg reported sparse picked up the following warning:
/home/gregkh/ara/greybus/uart.c:105:34: warning: cast to restricted __le16

This is due to the control variable in gb_uart_serial_state_request which
needs to be declared __le16 not __u16.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reported-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Latch modem control signals for tciomget
Bryan O'Donoghue [Tue, 16 Jun 2015 10:28:11 +0000 (11:28 +0100)]
greybus: uart: Latch modem control signals for tciomget

Latch signals coming from UART module for
- GB_UART_CTRL_DCD
- GB_UART_CTRL_DSR
- GB_UART_CTRL_RI

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Revert "greybus: reserve host cport id 0"
Greg Kroah-Hartman [Wed, 17 Jun 2015 02:43:05 +0000 (19:43 -0700)]
greybus: Revert "greybus: reserve host cport id 0"

This reverts commit 698d4bd3e7541a660a3c3665f0af9e787650a239 as Alex
says it is broken.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Merge branch alex into Alexandre
Greg Kroah-Hartman [Mon, 15 Jun 2015 23:53:23 +0000 (16:53 -0700)]
greybus: Merge branch alex into Alexandre

This resolves a conflict with es2.c that I fixed up.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2.c: add a control request for endpoints mapping
Alexandre Bailon [Mon, 15 Jun 2015 16:08:14 +0000 (18:08 +0200)]
greybus: es2.c: add a control request for endpoints mapping

ES2 give us more endpoints. Use them to map one cport to two endpoints
(in and out). Because there is more cports than endpoints, we still
need to mux other cports traffic on 2 endpoints.
Firmware currently assumes these endpoints are 2 and 3.

By default, all cports are muxed.
To map one cport to 2 endpoints, use map_cport_to_ep().

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2.c: Increase the number of bulk endpoints
Alexandre Bailon [Mon, 15 Jun 2015 16:08:13 +0000 (18:08 +0200)]
greybus: es2.c: Increase the number of bulk endpoints

ES2 support 16 endpoints. Update es2.c to allocate endpoints, urbs
and buffers for these new endpoints.

Currently, they are not yet used and es2.c is working in legacy mode
(only original endpoints are used).

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2.c: create dedicated struct for cport_in and cport_out
Alexandre Bailon [Mon, 15 Jun 2015 16:08:12 +0000 (18:08 +0200)]
greybus: es2.c: create dedicated struct for cport_in and cport_out

Instead of keep cport buffers, urbs and endpoints in es1_ap_dev,
move them in two dedicated struct (es1_cport_in and es1_cport_out),
in order to ease the migration to es2 (increase the number of endpoint).

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es2.c: Don't use magic value for USB control request
Alexandre Bailon [Mon, 15 Jun 2015 16:08:11 +0000 (18:08 +0200)]
greybus: es2.c: Don't use magic value for USB control request

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es1.c: Don't use magic value for USB control request
Alexandre Bailon [Mon, 15 Jun 2015 16:08:10 +0000 (18:08 +0200)]
greybus: es1.c: Don't use magic value for USB control request

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: esX: use one byte to encode cport ids in header
Alex Elder [Sat, 13 Jun 2015 16:02:11 +0000 (11:02 -0500)]
greybus: esX: use one byte to encode cport ids in header

We now limit the maximum value for both host and module CPort ids,
and we know they can always be represented in a single byte.

Make use of this by using only one of the two pad bytes for encoding
the CPort id in a message header.

(Note that we have never used a CPort higher than 255.  Encoding
such a small CPort id in little endian 2-byte format has the same
result as what is done here.)

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: reserve host cport id 0
Alex Elder [Sat, 13 Jun 2015 16:02:10 +0000 (11:02 -0500)]
greybus: reserve host cport id 0

For ES1 and ES2, we use pad bytes in an operation message header to
encode the CPort ID used for transferring the message.  The pad
bytes should otherwise be zero, and we ensure this as the message
is passed to or from the upper layer.

If host-side CPort ID 0 is used, we have no way of knowing whether
the CPort field has been "packed" into the header.

To allow detection of this, reserve host CPort id 0.  Update
cport_id_valid() to treat 0 as invalid.

(CPort ID 0 is reserved by one of the UniPro standards.  We'll
assume for now that we never use it for Greybus.)

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: rename HOST_DEV_CPORT_ID_MAX
Alex Elder [Sat, 13 Jun 2015 16:02:09 +0000 (11:02 -0500)]
greybus: rename HOST_DEV_CPORT_ID_MAX

We limit the number of host-side CPorts to a fixed maximum (which
is less than the 4096 that UniPro allows).  This patch imposes a
similar limit on the CPort IDs defined by modules (signaling an
error if one too large is found in a manifest).

It seems reasonable to use the same value for both limits.  Change
the name of the constant that defines the host limit and use it for
both.  Update cport_id_valid() to enforce the maximum.

(Ultimately we should impose a limit like this; this change is being
made in preparation for supporting multiple connections over a
single CPort.)

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: esX: encapsulate packing cport id into header
Alex Elder [Sat, 13 Jun 2015 16:02:08 +0000 (11:02 -0500)]
greybus: esX: encapsulate packing cport id into header

For the ES1 and ES2 host interfaces we encode the CPort ID over
which the message should be sent within the message itself.  The
CPort ID is recorded in unused pad bytes found in the operation
message header in order to avoid introducing misaligned messages.

This patch defines some helper routines to abstract this activity.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: introduce cport_id_valid()
Alex Elder [Sat, 13 Jun 2015 16:02:07 +0000 (11:02 -0500)]
greybus: introduce cport_id_valid()

Define a public predicate that defines whether a CPort ID is valid.

Use it in the message_send() routine, and make the message reported
more accurately reflect the error.  Also use it to check whether the
CPort ID in a received message is valid; if it is not, just drop the
message.

Get rid of local variable "buffer" in message_send(); it adds no
value.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: clean up properly when parsing bundles
Alex Elder [Fri, 12 Jun 2015 15:21:12 +0000 (10:21 -0500)]
greybus: manifest: clean up properly when parsing bundles

Currently, if an error occurs creating a bundle, we simply
return an error without cleaning up any of the bundles that
had already been successfully set up.

Add code to destroy bundles that have been created in the event
an error occurs.  Add a check to ensure the interface's list of
bundles was empty before parsing for bundles begins.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: bundle: fix gb_bundle_destroy()
Alex Elder [Fri, 12 Jun 2015 15:21:11 +0000 (10:21 -0500)]
greybus: bundle: fix gb_bundle_destroy()

Currently gb_bundle_destroy() takes an interface as an argument,
and really doesn't do what a function by that name should do.

What it now does is delete all bundles associated with a given
interface.  What it should do is destroy a single bundle.

Move the looping logic out of gb_bundle_destroy() and into its
caller, gb_interface_destroy().  Pass each bundle in an interface to
gb_bundle_destroy(), which will do what's required to destroy a
single bundle (including removing it from its interface's bundle
list under protection of the lock).

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: bundle: refactor gb_bundle_find()
Alex Elder [Fri, 12 Jun 2015 15:21:10 +0000 (10:21 -0500)]
greybus: bundle: refactor gb_bundle_find()

Rearrange gb_bundle_find() so it follows the pattern used by
gb_connection_find().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: clean up properly when parsing cports
Alex Elder [Fri, 12 Jun 2015 15:21:09 +0000 (10:21 -0500)]
greybus: manifest: clean up properly when parsing cports

Currently, if an error occurs creating a connection, we simply
return an error without cleaning up any of the connections that
had already been successfully set up.

Add code to destroy connections that have been created in the event
an error occurs.  Add a check to ensure the bundle's list of
connections was empty before parsing for CPorts begins.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: un-abstract host cport id allocation
Alex Elder [Fri, 12 Jun 2015 15:21:08 +0000 (10:21 -0500)]
greybus: connection: un-abstract host cport id allocation

I did this recently for the endo id allocation code.

It's clearer now that the allocation of a CPort ID to use for
the AP side of a connection is not very complicated, and it
happens in a pretty controlled environment.  The functions that
abstract getting and releasing those ids don't really add that
much value.

This patch removes gb_connection_hd_cport_id_alloc() and
gb_connection_hd_cport_id_free(), and just open-codes their
activity in the few places they are called.

It is obvious now that the CPort ID allocation isn't done in
atomic context, so we can change the ida_simple_get() call to
use GFP_KERNEL.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: drop unneeded gb_protocol_put() calls
Alex Elder [Fri, 12 Jun 2015 15:21:07 +0000 (10:21 -0500)]
greybus: connection: drop unneeded gb_protocol_put() calls

Although a connection records its protocol id when it gets
created, its protocol handler doesn't actually get assigned
until gb_connection_bind_protocol() is called.

In gb_connection_create() there are some error paths in
which a reference to the connection's protocol is released
before the protocol handler has been associated with the
connection.

Get rid of those calls.

As a result, we will never pass a null protocol pointer to
gb_protocol_put().  Add a precautionary warning in that
function in the event that ever occurs.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: remove extra kfree() call
Alex Elder [Fri, 12 Jun 2015 15:21:06 +0000 (10:21 -0500)]
greybus: connection: remove extra kfree() call

When an error occurs in the device_add() call for a connection, the
device reference is dropped as required.  Because that's the device's
only reference, that will also lead to gb_connection_release() being
called, which frees the connection structure.

Right now we're then making an extra request to free the connection,
which is wrong.  Fix that.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: fix the clean up while uart initiates connection unsucessfully
Phong Tran [Wed, 10 Jun 2015 14:03:17 +0000 (21:03 +0700)]
greybus: uart: fix the clean up while uart initiates connection unsucessfully

There is lack of unregister and free the tty driver.
This patch fixes it.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: remove __init from .h files
Greg Kroah-Hartman [Thu, 11 Jun 2015 16:22:51 +0000 (09:22 -0700)]
greybus: remove __init from .h files

__init does not belong in a .h file, as it does not do anything there,
so remove all instances of it.

Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: Fix compilation warning
Viresh Kumar [Thu, 11 Jun 2015 11:09:42 +0000 (16:39 +0530)]
greybus: endo: Fix compilation warning

WARNING: /home/viresh/work/repos/ara/greybus/greybus.o(.init.text+0xb8):
Section mismatch in reference from the function init_module() to the
function .exit.text:gb_endo_exit()

The function __init init_module() references
a function __exit gb_endo_exit().

Fix it by removing __exit from endo_exit().

Fixes: cf64356c5151 ("endo: define endo_init() and endo_exit()")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: check for duplicate cport ids
Alex Elder [Tue, 9 Jun 2015 22:42:58 +0000 (17:42 -0500)]
greybus: connection: check for duplicate cport ids

Check at connection creation time for an attempt to create a
connection with an interface CPort ID that's the same as one that's
already been created.

Define a new helper function to look for such a duplicate.  The
check for a duplicate is only performed at initialization time,
and CPorts are initialized serially for each bundle, so there's
no need to acquire the list lock for this search.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: bundle: check for duplicate bundle ids
Alex Elder [Tue, 9 Jun 2015 22:42:57 +0000 (17:42 -0500)]
greybus: bundle: check for duplicate bundle ids

Check at bundle creation time to ensure we're not creating a bundle
with an id that's the same as one that's already been created.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: rework bundle parsing
Alex Elder [Tue, 9 Jun 2015 22:42:56 +0000 (17:42 -0500)]
greybus: manifest: rework bundle parsing

Rework the the code that parses the manifest for bundles so it only
touches each manifest descriptor once.  (Previously the list was
scanned from the beginning repeatedly until all bundles were found.)
Shorten the name of the descriptor variable, to avoid line wrap.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: rework cport parsing
Alex Elder [Tue, 9 Jun 2015 22:42:55 +0000 (17:42 -0500)]
greybus: manifest: rework cport parsing

Rework the the code that parses the manifest for CPorts associated
with a bundle so it only touches each manifest descriptor once.
(Previously the list was scanned from the beginning repeatedly
until all bundle CPorts were found.)  Shorten the name of the
descriptor variable, to avoid line wrap.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: use bundle's embedded interface pointer
Alex Elder [Tue, 9 Jun 2015 22:42:54 +0000 (17:42 -0500)]
greybus: manifest: use bundle's embedded interface pointer

An initialized bundle structure contains a pointer to its
interface.  Because of this there's no need to provide
the interface pointer to gb_manifest_parse_cports().  This
also precludes the possibility of passing a bad interface
pointer.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: really minor cleanups
Alex Elder [Tue, 9 Jun 2015 22:42:53 +0000 (17:42 -0500)]
greybus: manifest: really minor cleanups

This patch incorporates some very small cleanups to "manifest.c":
    - Rearrange code a bit in gb_manifest_parse() that ensures a
      manifest is big enough to hold a header.  If the manifest is
      exactly the size of a header, the error reported will now be
      "...must have 1 interface..." rather than "short manifest".
    - Fix the function comment for gb_manifest_parse_cports().
    - Use "an interface," not "a interface," and don't capitalize.
    - Delete some braces when getting interface product string.
    - A few other minor changes to comments and white space.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: clean up id assignment code
Alex Elder [Tue, 9 Jun 2015 22:42:52 +0000 (17:42 -0500)]
greybus: endo: clean up id assignment code

Recently code was added (back) to assign a unique id to each
endo, so satisfy uniqueness requirements of the Linux device
subsystem.  An ID allocator is used to manage the space of IDs.

Now that we have gb_endo_init(), we can initialize the map there,
and fully hide the ID map within "endo.c".

The original functions gb_endo_id_alloc() and gb_endo_id_free()
provided a nice abstract interface, but the direct ID allocation
calls are quite simple, so just call them directly.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: define endo_init() and endo_exit()
Alex Elder [Tue, 9 Jun 2015 22:42:51 +0000 (17:42 -0500)]
greybus: endo: define endo_init() and endo_exit()

Define init and exit functions to do one-time setup and teardown
of endo-related functionality.  Currently they're place holders;
the next patch will populate them.

Note that we now call gb_operation_exit() from gb_init(), so
we can no longer mark that function with __exit.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: tag core init and exit functions
Alex Elder [Tue, 9 Jun 2015 22:42:50 +0000 (17:42 -0500)]
greybus: tag core init and exit functions

The top-level functions gb_init() and gb_exit() are tagged with
__init and __exit, respectively.  These functions call a few
other functions that are similarly used only at initialization
and termination time.  So mark those functions accordingly.

Note that, because gb_ap_exit() and gb_debugfs_cleanup()
are called by gb_init() in error paths, these functions
cannot be declared with the __exit attribute.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: drop some unnecessary headers
Alex Elder [Tue, 9 Jun 2015 22:42:49 +0000 (17:42 -0500)]
greybus: drop some unnecessary headers

There's no need to include anything other than "greybus.h" in
"connection.c".  Same thing in "core.c" and "manifest.c" and
"svc.c".  Some files need headers included, but most come along
with "greybus.h".

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gb-audio: Reset sample count when CPort deactivated
Mark Greer [Tue, 9 Jun 2015 22:29:35 +0000 (15:29 -0700)]
greybus: gb-audio: Reset sample count when CPort deactivated

The sample count placed in Greybus I2S audio messages should be
reset every time a new audio stream is set up.  However, the
current code does not do the reset so make it so it does.

Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: es?: decrease buffer size to 2k
Greg Kroah-Hartman [Tue, 9 Jun 2015 20:47:48 +0000 (13:47 -0700)]
greybus: es?: decrease buffer size to 2k

The firmware is having a hard time with 4k buffers and memory
allocation, so decrease the size on the host side to 2k.  Also move away
from using PAGE_SIZE to denote 4k as that's not the case on all
architectures, and someone, someday, might get a rude surprise.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: remove the redundant unregister chrdev
Phong Tran [Tue, 9 Jun 2015 13:28:18 +0000 (20:28 +0700)]
greybus: uart: remove the redundant unregister chrdev

The unregister_chrdev_region() does twice here.
The chrdev region was unregistered
inside tty_unregister_driver().

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: move endo id map declaration to endo.h
Phong Tran [Tue, 9 Jun 2015 13:28:17 +0000 (20:28 +0700)]
greybus: endo: move endo id map declaration to endo.h

There is a sparse warning. The endo id map is also
used in endo.c. Should define in endo.h

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Tear down devices in the reverse order
Viresh Kumar [Thu, 4 Jun 2015 12:46:45 +0000 (18:16 +0530)]
greybus: Tear down devices in the reverse order

Normally, its a good practice to free resources in the reverse order in
which they are allocated, so that all the dependencies can be sorted out
properly.

This is true while creating/destroying devices as well. For example
consider this scenario (I faced a crash with control protocol due to
this). For a new module, we will first create a bundle+connection for
the control cport and then create other bundles/connections after
parsing manifest.

And while destroying interface on module hot unplug, we are removing the
devices in the order they are added. And so the bundle/connection for
the control cport are destroyed first. But, control cport was still
required while destroying other bundles/connections.

To solve this problem, lets destroy the resources in the reverse order
in which they are added.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: manifest: clean up a few pr_err() calls
Alex Elder [Mon, 8 Jun 2015 17:05:14 +0000 (12:05 -0500)]
greybus: manifest: clean up a few pr_err() calls

Provide a little more information in two pr_err() calls.
Also enclose a reported condition in parentheses, to match
the style used everywhere else in the file.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: core: rename greybus_deregister()
Alex Elder [Mon, 8 Jun 2015 17:05:13 +0000 (12:05 -0500)]
greybus: core: rename greybus_deregister()

Rename greybus_deregister() to be greybus_deregister_driver(), so
its name mirrors the greybus_register_driver() function it matches.
Define greybus_deregister() to be a trivial macro.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: properly interpret receive data size
Alex Elder [Mon, 8 Jun 2015 17:05:12 +0000 (12:05 -0500)]
greybus: uart: properly interpret receive data size

In gb_uart_request_recv(), the receive data size is in little-endian
format.  Do the proper byte swapping of that value before using it.
Found by "make check".

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: connection: make gb_connection_hd_find() private
Alex Elder [Mon, 8 Jun 2015 17:05:11 +0000 (12:05 -0500)]
greybus: connection: make gb_connection_hd_find() private

Give gb_connection_hd_find() static scope; it's never used
outside "connection.c".

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: svc: driver is basic to Greybus (not GP Bridge)
Alex Elder [Mon, 8 Jun 2015 17:05:10 +0000 (12:05 -0500)]
greybus: svc: driver is basic to Greybus (not GP Bridge)

The SVC protocol driver should have been defined as a basic
Greybus protocol driver, not a GP Bridge protocol driver.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Prefix module-id with endo id
Viresh Kumar [Sun, 7 Jun 2015 03:43:16 +0000 (09:13 +0530)]
greybus: Prefix module-id with endo id

Prefix module-id with endo-id to uniquely identify it for the entire
kernel.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Generate greybus wide unique ids for endo devices
Viresh Kumar [Sun, 7 Jun 2015 03:43:15 +0000 (09:13 +0530)]
greybus: Generate greybus wide unique ids for endo devices

Currently we name the endo device as "endo". And it shows up with the
same name in sysfs directory: /sys/bus/greybus/devices/.

But each device in kernel should be represented by a unique id in
kernel, and "endo" isn't unique.

Lets generate unique ids for endo devices. The ida mechanism for
allocating ids may be overkill but it works.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: s/bundle_cport_id/intf_cport_id
Viresh Kumar [Thu, 4 Jun 2015 04:48:01 +0000 (10:18 +0530)]
greybus: s/bundle_cport_id/intf_cport_id

This isn't unique just for the bundle but the complete interface. Its
wrong to call it bundle_cport_id. Lets name it intf_cport_id to make
things clear.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: operation: Remove unused variable 'buffer'
Viresh Kumar [Thu, 4 Jun 2015 04:28:21 +0000 (09:58 +0530)]
greybus: operation: Remove unused variable 'buffer'

'buffer' isn't used in this function, remove it.

Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Remove magic numbers make struct gb_tty variable names consistent
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:51 +0000 (13:40 +0100)]
greybus: uart: Remove magic numbers make struct gb_tty variable names consistent

Use defines for the data format command.
Tidy up naming of gb_tty variables.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Add gb_uart_request_recv for receiving async UART data
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:50 +0000 (13:40 +0100)]
greybus: uart: Add gb_uart_request_recv for receiving async UART data

gb_uart_request_recv job in life is to process unsolicited greybus
mesages from the UART.
Hook the incoming UART data and pass to the TTY layer.
Line-state changes still TBD.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: kmalloc for send_data once only
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:49 +0000 (13:40 +0100)]
greybus: uart: kmalloc for send_data once only

Make kmalloc for the send buffer a one time alloc based on the MTU for
a given greybus link.

The write_room for an gb_operation_sync then will be the size of the
buffer we use for a single operation.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: send_data should return size or error
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:48 +0000 (13:40 +0100)]
greybus: uart: send_data should return size or error

gb_operation_sync returns 0 on success but the calling function
expects the number of bytes written on success or a negative errno

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Update uart.c to register tty ports
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:47 +0000 (13:40 +0100)]
greybus: uart: Update uart.c to register tty ports

For each new UART connection we need to do a tty_port_init else
we'll crash when trying to access the tty mutex later on.
Base the TTY major/minor numbers on non-zero values.
Supply an empty operations structure for the newly regitered port.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Reduce UART count from 255 to 16
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:46 +0000 (13:40 +0100)]
greybus: uart: Reduce UART count from 255 to 16

Arbitrary number 255 is both not aligned and probably too big.
Move the UART count down to 16 which is still large but, more realistic.
8 may be too few for future testing setups, 16 should accomodate any.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Tidy naming convention to more closely match spec
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:45 +0000 (13:40 +0100)]
greybus: uart: Tidy naming convention to more closely match spec

Update tabs and naming of structures to match the naming used in the greybus
specification more closely.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Move UART protocol structs/defines to greybus_protocols.h
Bryan O'Donoghue [Tue, 2 Jun 2015 12:40:44 +0000 (13:40 +0100)]
greybus: uart: Move UART protocol structs/defines to greybus_protocols.h

gbsim depends on the structures and defines in greybus_protocols.h
generally in order to simulate firmware. Move UART defines into this
header to facilitate.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: uart: Fix the memory leak in connection init
Phong Tran [Mon, 1 Jun 2015 15:19:45 +0000 (22:19 +0700)]
greybus: uart: Fix the memory leak in connection init

If alloc minor is error, gb_tty should free.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: Add missing '\n' sprintf() for sysfs files
Viresh Kumar [Mon, 1 Jun 2015 12:13:36 +0000 (17:43 +0530)]
greybus: endo: Add missing '\n' sprintf() for sysfs files

Because of the missing '\n', this is how the output of reading endo
sysfs files looks:

root# cat /sys/bus/greybus/devices/endo/id
0x4755root#

Fix it by including \n to the end of the printed string.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: add irq-type defines
Johan Hovold [Thu, 28 May 2015 17:03:34 +0000 (19:03 +0200)]
greybus: gpio: add irq-type defines

Add Greybus GPIO IRQ-type defines rather than rely on the current
Linux implementation.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: remove unused debounce define
Johan Hovold [Thu, 28 May 2015 17:03:33 +0000 (19:03 +0200)]
greybus: gpio: remove unused debounce define

Remove unused debounce define from protocol header.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: delete "0xXXXX" portion in sysfs "endo" directory
Alex Elder [Wed, 27 May 2015 16:17:53 +0000 (11:17 -0500)]
greybus: endo: delete "0xXXXX" portion in sysfs "endo" directory

With the Endo "id" attribute in place, there's no need to encode
the ID of an Endo in its sysfs path.  So get rid of 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: drop redundant prefixes from sysfs basenames
Alex Elder [Wed, 27 May 2015 16:17:52 +0000 (11:17 -0500)]
greybus: endo: drop redundant prefixes from sysfs basenames

This commit:
    7e761e2 endo: rework some attributes
added a new "endo_id" attribute, located under a new "Endo"
directory in sysfs.  The resulting path looks like:
    Documentation/sysfs/endo-TYPE/Endo/endo_id
There's no need to have a separate "Endo" subdirectory to contain
Endo-specific attributes.

That commit also added "svc_" to some other paths related to the
SVC, like:
    Documentation/sysfs/endo-TYPE/SVC/svc_version
The additional "svc_" is redundant.

This patch retouches those paths a bit, mainly to remove some
redundancy.  It also makes the pathname components all lower case.
As a result, the above two paths now look like:
    Documentation/sysfs/endo-TYPE/id
    Documentation/sysfs/endo-TYPE/svc/version

All other Endo sysfs files are updated similarly.

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: update sysfs documentation files
Alex Elder [Wed, 27 May 2015 16:17:51 +0000 (11:17 -0500)]
greybus: update sysfs documentation files

Impose a few editorial conventions on the Greybus-related sysfs
files under "Documentation".
    - Capitalize "Endo" (except in path names)
    - Capitalize "ID" (except in path names)
    - Use "..." to indicate unspecified path components (because
      ".." means something else).
    - Add the "0x" prior to the "XXXX" representing the Endo ID.

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: add documentation for Endo sysfs files
Alex Elder [Wed, 27 May 2015 16:17:50 +0000 (11:17 -0500)]
greybus: add documentation for Endo sysfs files

Update the files documenting Greybus-related sysfs files under
Documentation/ to reflect the addition of the two recently-added
Endo attributes.

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: audio: Remove the MODULE_LICENSE()
Phong Tran [Thu, 28 May 2015 16:21:01 +0000 (23:21 +0700)]
greybus: audio: Remove the MODULE_LICENSE()

This is not a kernel module. It should not use
the module license macro.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: audio: Fix typo for macro I2S data version minor
Phong Tran [Thu, 28 May 2015 16:21:00 +0000 (23:21 +0700)]
greybus: audio: Fix typo for macro I2S data version minor

This macro should be DATA not MGMT.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: greybus_protocols: fix guard tag
Alex Elder [Wed, 27 May 2015 19:45:58 +0000 (14:45 -0500)]
greybus: greybus_protocols: fix guard tag

I neglected to update the "#ifndef/#define" when I renamed
"greybus_protocols.h".  Fix that.

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: gpio: update operation types
Johan Hovold [Wed, 27 May 2015 10:45:07 +0000 (12:45 +0200)]
greybus: gpio: update operation types

Update the remaining operation types now that the ack operation is gone
to avoid leaving a hole in the type definitions.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Merge branch 'master' of github.com:gregkh/greybus
Greg Kroah-Hartman [Thu, 28 May 2015 21:02:02 +0000 (14:02 -0700)]
greybus: Merge branch 'master' of github.com:gregkh/greybus

9 years agogreybus: svc: use macro for init and exit protocol
Phong Tran [Wed, 27 May 2015 14:31:03 +0000 (21:31 +0700)]
greybus: svc: use macro for init and exit protocol

Change to gb_gpbridge_protocol_driver for
making the consitent with other drivers.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: svc: Fix endian of hotplug request data
Phong Tran [Wed, 27 May 2015 14:31:02 +0000 (21:31 +0700)]
greybus: svc: Fix endian of hotplug request data

data of hotplug request should exchange to native
CPU format before assignment.

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: fix interrupt protocol
Johan Hovold [Tue, 26 May 2015 13:29:25 +0000 (15:29 +0200)]
greybus: gpio: fix interrupt protocol

The current interrupt implementation uses the simple irq-flow handler,
which means that the interrupt subsystem makes no irq-chip callbacks
when handling an interrupt. Specifically, no end-of-interrupt message is
sent when the threaded handler has run. This means that we may currently
re-enable an interrupt before it has been serviced (i.e. the irq-event
operation may complete before the threaded handler has run).

The simple flow handler also silently drops a second interrupt arriving
while a handler is running. This means that we may lose a second edge
interrupt with the current firmware.

Switch to a new one-shot interrupt protocol, where the primary handler
(firmware) always masks and acks an interrupt before sending an event to
the AP. The AP is responsible for unmasking the interrupt when it has
been handled. By having the firmware ack an edge interrupt before
sending the event, a second edge interrupt will no longer get lost.

This one-shot protocol can be implemented in the kernel by using the
level irq-flow handler, one-shot interrupts with threaded handlers and
bus-lock synchronisation for slow buses. Note that the same flow handler
is used for both edge and level interrupts.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: fix atomic sleep when using interrupts
Johan Hovold [Tue, 26 May 2015 13:29:24 +0000 (15:29 +0200)]
greybus: gpio: fix atomic sleep when using interrupts

The irq-chip callbacks are made in atomic context where we must not do
any synchronous greybus operations.

Fix the current gpio-interrupt implementation by using the bus-lock
functionality provided by the irq subsystem.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: rename irq mask and unmask callbacks
Johan Hovold [Tue, 26 May 2015 13:29:23 +0000 (15:29 +0200)]
greybus: gpio: rename irq mask and unmask callbacks

Rename irq mask and unmask functions to match the callback names.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: use irq-domain lookups
Johan Hovold [Tue, 26 May 2015 13:29:22 +0000 (15:29 +0200)]
greybus: gpio: use irq-domain lookups

Use irq_find_mapping directly rather than go through the legacy gpio
interface.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: don't call irq-flow handler directly
Johan Hovold [Tue, 26 May 2015 13:29:21 +0000 (15:29 +0200)]
greybus: gpio: don't call irq-flow handler directly

Use generic_handle_irq_desc rather than call a hardcoded irq-flow
handler directly.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: remove unused irq-ack operation
Johan Hovold [Tue, 26 May 2015 13:29:20 +0000 (15:29 +0200)]
greybus: gpio: remove unused irq-ack operation

Remove unused irq-ack operation, which has never been called and does
not make sense for message-signalled interrupts over slow buses.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: gpio: fix debugfs output
Johan Hovold [Tue, 26 May 2015 13:29:19 +0000 (15:29 +0200)]
greybus: gpio: fix debugfs output

Fix debugfs output by removing the unimplemented, custom dbg_show
callback. The default implementation is perfectly sufficient.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: operation: add support for incoming unidirectional operations
Johan Hovold [Tue, 26 May 2015 13:29:18 +0000 (15:29 +0200)]
greybus: operation: add support for incoming unidirectional operations

Add support for incoming, unidirectional operations where the sender of
a request does not care about a response.

Unidirectional operations have an operation id of 0.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: Merge branch 'master' of github.com:gregkh/greybus
Greg Kroah-Hartman [Tue, 26 May 2015 15:39:33 +0000 (08:39 -0700)]
greybus: Merge branch 'master' of github.com:gregkh/greybus

9 years agogreybus: introduce SVC protocol
Alex Elder [Fri, 22 May 2015 18:02:08 +0000 (13:02 -0500)]
greybus: introduce SVC protocol

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>
9 years agogreybus: update copyrights
Alex Elder [Fri, 22 May 2015 17:59:16 +0000 (12:59 -0500)]
greybus: update copyrights

Update the copyright statements for recently-modified source files.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: add copyright statements
Alex Elder [Fri, 22 May 2015 17:59:15 +0000 (12:59 -0500)]
greybus: add copyright statements

The Greybus audio source files included no copyright statements.
Add them.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: core: don't set up endo until host device is initialized
Alex Elder [Fri, 22 May 2015 17:56:49 +0000 (12:56 -0500)]
greybus: core: don't set up endo until host device is initialized

Currently, the data structure representing an Endo is set up at the
time a host device gets created.  This is too early.

Once the control infrastructure is in place, there's no sense in
setting up the Endo utnil after we have heard from the SVC via a
probe operation on our control CPort.  And even then, there's
no real point until we've successfully authenticated with the SVC,
which will be indicated by the arrival of the Control protocol
"connected" operation request notifying us that our SVC CPort
is operational.

In addition to this logical argument, we also can't actually
receive any messages on the Control CPort until the host device
is set up and ready to receive messages.  At the point we're
currently setting up the Endo data structure, that has not yet
been done.

Define a new exported function greybus_endo_setup(), which will
be used (for now) as the entry point for setting up the Endo
data structure.  Arrange to call it in the host USB driver
probe method, *after* we are set up for handling messages.

Note: Once the control protocol has been implemented, this function
may no longer need to be exported.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: record AP interface id
Alex Elder [Fri, 22 May 2015 17:56:48 +0000 (12:56 -0500)]
greybus: endo: record AP interface id

The AP resides in a particular position on an Endo, which is
identified by an interface ID.  (For now we'll assume the AP uses
just one interface.)  Record the this AP interface ID when creating
an Endo.  Add a sysfs attribute to display it as well.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: rework some attributes
Alex Elder [Fri, 22 May 2015 17:56:47 +0000 (12:56 -0500)]
greybus: endo: rework some attributes

The SVC is not the same as the Endo.  There are some attributes
(such as the Endo ID) that are independent of attributes of
the SVC (like its version).

The current "Endo attributes" are really SVC attributes.
Rename a few functions and variables to reflect that.

Add a new attribute group for Endo-specific attributes, and
populate it with the Endo ID.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: endo: encapsulate computing the max interface id
Alex Elder [Fri, 22 May 2015 17:56:46 +0000 (12:56 -0500)]
greybus: endo: encapsulate computing the max interface id

The maximum interface id on an Endo is the result of a non-trivial
calculation.  It'll be needed for an upcoming patch, so create a
macro to compute it.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: rename "gpbridge.h"
Alex Elder [Fri, 22 May 2015 17:35:32 +0000 (12:35 -0500)]
greybus: rename "gpbridge.h"

The file "gpbridge.h" is now used as a single place to define
all protocol message structures.  These protocols are not
necessarily related to the GP bridge, so the name of the
file is misleading.

Rename it "greybus_protocols.h".

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: include "gpbridge.h" from "greybus.h"
Alex Elder [Fri, 22 May 2015 17:35:31 +0000 (12:35 -0500)]
greybus: include "gpbridge.h" from "greybus.h"

Avoid the need for all the source files to include "gpbridge.h"
by just having "greybus.h" include it.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
9 years agogreybus: core: return error code when creating host device
Alex Elder [Fri, 22 May 2015 14:52:45 +0000 (09:52 -0500)]
greybus: core: return error code when creating host device

Return a pointer-coded error from greybus_create_hd() rather
than NULL in the event an error occurs.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>