linux-toradex.git/include/linux/usb/gadget.h, branch v3.9.4

usb: gadget: completely remove ->start/->stop

2013-01-24T19:11:32+00:00

Those have been deprecated for a long time and
previous patches just converted all remaining
users of those.

Since there are no in-tree users and we don't
want any new users for them, let's obliterate
every piece of code related to those calls.

Signed-off-by: Felipe Balbi

usb: gadget: composite: introduce usb_gstrings_attach()

2013-01-21T18:52:48+00:00

The USB strings don't (yet) fully work in multiple configs/gadget
environment. The string id is assigned to the descriptor and the struct
usb_strings. We create a copy of the individual descriptor so we don't
clash if we use a function more than once. However, we have only one
struct usb_string for each string.

Currently each function which is used multiple times checks for
"id != 0" and only assigns string ids if it did not happen yet. This
works well if we use the same function multiple times as long as we do
it within the "one" gadget we have. Trouble starts once we use the same
function in a second gadget.

In order to solve this I introduce usb_gstrings_attach(). This function will
crate a copy all structs except for the strings which are not copied.
After the copy it will assign USB ids and attach it to cdev.

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: udc-core: introduce UDC binding by name

2013-01-21T18:52:46+00:00

This patch adds udc_attach_driver() which allows to bind an UDC which is
specified by name to a driver. The name of available UDCs can be
obtained from /sys/class/udc. This interface is intended for configfs
interface.

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: always update HS/SS descriptors and create a copy of them

2012-10-31T13:09:44+00:00

HS and SS descriptors are staticaly created. They are updated during the
bind process with the endpoint address, string id or interface numbers.

After that, the descriptor chain is linked to struct usb_function which
is used by composite in order to serve the GET_DESCRIPTOR requests,
number of available configs and so on.

There is no need to assign the HS descriptor only if the UDC supports
HS speed because composite won't report those to the host if HS support
has not been reached. The same reasoning is valid for SS.

This patch makes sure each function updates HS/SS descriptors
unconditionally and uses the newly introduced helper function to create a
copy the descriptors for the speed which is supported by the UDC.

While at that, also rename f->descriptors to f->fs_descriptors in order
to make it more explicit what that means.

Cc: Laurent Pinchart 
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: move global vars from epautoconf into struct usb_gadget

2012-09-10T12:37:08+00:00

epautoconf has two global variables which count the endpoint number of
last assigned endpoint.
This patch removes the global variable and keeps it as per (UDC) gadget.
While here, the ifdef is removed and now the in and outpoint are
enumerated unconditionally. The dwc3 for instance supports 32 endpoints
in total.

Acked-by: Michal Nazarewicz 
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: remove global variable composite in composite.c

2012-09-10T12:35:41+00:00

This patch removes the global variable composite in composite.c.
The private data which was saved there is now passed via an additional
argument to the bind() function in struct usb_gadget_driver.

Only the "old-style" UDC drivers have to be touched here, new style are
doing it right because this change is made in udc-core.

Acked-by: Michal Nazarewicz 
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: move bind() callback back to struct usb_gadget_driver

2012-09-10T12:35:16+00:00

This partly reverts 07a18bd7 ("usb gadget: don't save bind callback in
struct usb_composite_driver") and fixes new drivers. The section missmatch
problems was solved by whitelisting bind callback in modpost.

Acked-by: Michal Nazarewicz 
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Felipe Balbi

usb: gadget: get rid of USB_GADGET_{DUAL,SUPER}SPEED

2012-08-31T09:49:40+00:00

This commit removes USB_GADGET_DUALSPEED and USB_GADGET_SUPERSPEED
Kconfig options.  Since now kernel allows many UDC drivers to be
compiled, those options may turn to no longer be valid.  For
instance, if someone decides to build UDC that supports super
speed and UDC that supports high speed only, the latter will be
"assumed" to support super speed since USB_GADGET_SUPERSPEED will
be selected by the former.

The test of whether CONFIG_USB_GADGET_*SPEED was defined was just
an optimisation which removed otherwise dead code (ie. if UDC is
not dual speed, there is no need to handle cases that can happen
if speed is high).  This commit removes those checks.

Signed-off-by: Michal Nazarewicz 
Signed-off-by: Felipe Balbi

usb: gadget: add generic map/unmap request utilities

2012-02-28T12:48:23+00:00

such utilities are currently duplicated on all UDC
drivers basically with the same structure. Let's group
all implementations into one generic implementation
and get rid of that duplication.

Signed-off-by: Felipe Balbi

usb: gadget: introduce support for sg lists

2011-12-21T11:24:44+00:00

Some controllers support scatter/gather transfers
and that might be very useful for some gadget drivers.

This means that we can make use of larger buffer
allocations which means we will have less completion
IRQs overtime, thus improving the perceived performance.

Signed-off-by: Felipe Balbi