linux-toradex.git/include/linux/usb/gadget.h, branch v4.9.16

usb: gadget: fix request length error for isoc transfer

2017-01-12T10:39:19+00:00

commit 982555fc26f9d8bcdbd5f9db0378fe0682eb4188 upstream.

For isoc endpoint descriptor, the wMaxPacketSize is not real max packet
size (see Table 9-13. Standard Endpoint Descriptor, USB 2.0 specifcation),
it may contain the number of packet, so the real max packet should be
ep->desc->wMaxPacketSize && 0x7ff.

Cc: Felipe F. Tonello 
Cc: Felipe Balbi 
Fixes: 16b114a6d797 ("usb: gadget: fix usb_ep_align_maybe
  endianness and new usb_ep_aligna")
Signed-off-by: Peter Chen 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman

usb: gadget: add a new quirk to avoid skb_reserve in u_ether.c

2016-08-31T07:06:03+00:00

Some platforms (e.g. USB-DMAC on R-Car SoCs) has memory alignment
restriction. If memory alignment is not match, the usb peripheral
driver decides not to use the DMA controller. Then, the performance
is not good.

In the case of u_ether.c, since it calls skb_reserve() in rx_submit(),
it is possible to cause memory alignment mismatch.

So, this patch adds a new quirk "quirk_avoids_skb_reserve" to avoid
skb_reserve() calling in u_ether.c to improve performance.

A peripheral driver will set this flag and network gadget drivers
(e.g. f_ncm.c) will reference the flag via gadget_avoids_skb_reserve().

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: gadget: fix usb_ep_align_maybe endianness and new usb_ep_align

2016-08-25T09:13:13+00:00

USB spec specifies wMaxPacketSize to be little endian (as other properties),
so when using this variable in the driver we should convert to the current
CPU endianness if necessary.

This patch also introduces usb_ep_align() which does always returns the
aligned buffer size for an endpoint. This is useful to be used by USB requests
allocator functions.

Signed-off-by: Felipe F. Tonello 
Signed-off-by: Felipe Balbi

usb: gadget: add tracepoints to the gadget API

2016-06-21T07:38:41+00:00

This new set of tracepoints will help all gadget
drivers and UDC drivers when problem appears. Note
that, in order to be able to add tracepoints to
udc-core.c we had to rename that to core.c and
statically link it with trace.c to form
udc-core.o. This is to make sure that module name
stays the same.

Signed-off-by: Felipe Balbi

usb: gadget: move gadget API functions to udc-core

2016-06-21T07:38:34+00:00

instead of defining all functions as static inlines,
let's move them to udc-core and export them with
EXPORT_SYMBOL_GPL, that way we can make sure that
only GPL drivers will use them.

As a side effect, it'll be nicer to add tracepoints
to the gadget API.

While at that, also fix Kconfig dependencies to
avoid randconfig build failures.

Acked-By: Sebastian Reichel 
Acked-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: gadget: Fix binding to UDC via configfs interface

2016-05-31T07:02:53+00:00

By default user could store only valid UDC name in configfs UDC
attr by doing:

echo $UDC_NAME > UDC

Commit (855ed04 "usb: gadget: udc-core: independent registration of
gadgets and gadget drivers") broke this behavior and allowed to store
any arbitrary string in UDC file and udc core was waiting for such
controller to appear.

echo "any arbitrary string here" > UDC

This commit fix this by adding a flag which prevents configfs
gadget from being added to list of pending drivers if UDC with
given name has not been found.

Signed-off-by: Krzysztof Opasiak 
Signed-off-by: Felipe Balbi

usb: gadget: udc: core: add usb_gadget_{un}map_request_by_dev()

2016-04-19T08:11:54+00:00

If the following environment, the first argument of DMA API should
be set to a DMAC's device structure, not a udc controller's one.
 - A udc controller needs an external DMAC device (like a DMA Engine).
 - The external DMAC enables IOMMU.

So, this patch add usb_gadget_{un}map_request_by_dev() API to set
a DMAC's device structure by a udc controller driver.

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: gadget: add hnp_polling_support and host_request_flag in usb_gadget

2016-03-04T13:14:35+00:00

Add 2 flags for USB OTG HNP polling, hnp_polling_support is to indicate
if the gadget can support HNP polling, host_request_flag is used for
gadget to store host request information from application, which can be
used to respond to HNP polling from host.

Acked-by: Peter Chen 
Signed-off-by: Li Jun 
Signed-off-by: Felipe Balbi

usb: gadget: provide interface for legacy gadgets to get UDC name

2016-03-04T13:14:35+00:00

Since commit 855ed04a3758b205e84b269f92d26ab36ed8e2f7 ("usb: gadget:
udc-core: independent registration of gadgets and gadget drivers") gadget
drivers can not assume that UDC drivers are already available on their
initialization. This broke the HACK, which was used in gadgetfs driver,
to get UDC controller name. This patch removes this hack and replaces it
by additional function in the UDC core (which is usefully only for legacy
drivers, please don't use it in the new code).

Reported-by: Vegard Nossum 
Signed-off-by: Marek Szyprowski 
Tested-by: Vegard Nossum 
Signed-off-by: Felipe Balbi

usb: gadget: Update usb_assign_descriptors for SuperSpeedPlus

2016-03-04T13:14:23+00:00

Add the 'ssp_descriptors' parameter to the usb_assign_descriptors()
function. This allows a function driver to add descriptors for
SuperSpeedPlus speeds if it supports it.

Also update all uses of this function in the gadget subsystem so that
they pass NULL for the ssp_descriptors parameters.

Signed-off-by: John Youn 
Signed-off-by: Felipe Balbi