lwn.git/Documentation/usb/gadget-testing.txt, branch docs-5.3

docs: usb: convert documents to ReST

2019-04-16T10:16:19+00:00

Convert USB documents to ReST, in order to prepare for adding it to the kernel API book, as most of the stuff there are driver or subsystem-related. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman

Documentation: usb: fix typo in UVC gadgetfs config command

2018-01-11T17:39:52+00:00

This seems to be a copy&paste error. With the fix the uvc gadget now can be created by following the instrucitons. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman

Documentation: fix usb related doc refs

2017-10-12T17:15:48+00:00

Update ref to usb proc_usb_info.txt. Signed-off-by: Tom Saeger Signed-off-by: Jonathan Corbet

usb: gadget: add f_uac1 variant based on a new u_audio api

2017-06-19T06:22:47+00:00

This patch adds a new function 'f_uac1' (f_uac1 with virtual "ALSA card") that uses recently created u_audio API. Comparing to legacy f_uac1 function implementation it doesn't require any real Audio codec to be present on the device. In f_uac1 audio streams are simply sinked to and sourced from a virtual ALSA sound card created using u_audio API. Legacy f_uac1 approach is to write audio samples directly to existing ALSA sound card f_uac1 approach is more generic/flexible one - create an ALSA sound card that represents USB Audio function and allows to be used by userspace application that may choose to do whatever it wants with the data received from the USB Host and choose to provide whatever it wants as audio data to the USB Host. f_uac1 also has capture support (gadget->host) thanks to easy implementation via u_audio. By default, capture interface has 48000kHz/2ch configuration, same as playback channel has. f_uac1 descriptors naming convention uses f_uac2 driver naming convention that makes it more common and meaningful. Comparing to f_uac1_legacy, the f_uac1 doesn't have volume/mute functionality. This is because the f_uac1 volume/mute feature unit was dummy implementation since that driver creation (2009) and never had any real volume control or mute functionality, so there is no any difference here. Since f_uac1 functionality, exposed interface to userspace (virtual ALSA card), input parameters are so different comparing to f_uac1_legacy, that there is no any reason to keep them in the same file/module, and separate function was created. g_audio can be built using one of existing UAC functions (f_uac1, f_uac1_legacy or f_uac2) Signed-off-by: Ruslan Bilovol Signed-off-by: Felipe Balbi

usb: gadget: function: make current f_uac1 implementation legacy

2017-06-19T06:22:47+00:00

Before introducing new f_uac1 function (with virtual ALSA card) make current implementation legacy. This includes renaming of existing files, some variables, config options and documentation Signed-off-by: Ruslan Bilovol Signed-off-by: Felipe Balbi

usb: gadget: uac2: add req_number as parameter

2017-01-24T09:04:21+00:00

There are only two requests for uac2, it may not be enough at high loading system which usb interrupt handler can't be serviced on time, then the data will be lost since it is isoc transfer for audio. In this patch, we introduce a parameter for the number for usb request, and the user can override it if current number for request is not enough for his/her use case. Besides, update this parameter for legacy audio gadget and documentation. Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi

Documentation: usb: update usb-tools repository address

2015-12-16T16:07:30+00:00

It seems that gitorious repository is no longer accessible, so we replace it with address to active repository. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

Documentation: usb: gadget-testing: add description for depth of queue

2015-12-15T15:12:41+00:00

Add both bulk and iso depth of queue for sourcesink. Reviewed-by: Krzysztof Opasiak Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi

doc: usb: gadget-testing: using the updated testusb.c

2015-07-31T14:02:07+00:00

testusb.c at http://www.linux-usb.org/usbtest/ is out of date, using the one at the kernel source folder. Cc: Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi

usb: gadget: rndis: remove the limit of available rndis connections

2015-05-07T18:47:17+00:00

RNDIS function has a limitation on the number of allowed instances. So far it has been RNDIS_MAX_CONFIGS, which happens to be one. In order to eliminate this kind of arbitrary limitation we should not preallocate a predefined (RNDIS_MAX_CONFIGS) array of struct rndis_params instances but instead allow allocating them on demand. This patch allocates struct rndis_params on demand in rndis_register(). Coversly, the structure is free()'d in rndis_deregister(). If CONFIG_USB_GADGET_DEBUG_FILES is set, the proc files are created which is the same behaviour as before, but the moment of creation is delayed until struct rndis_params is actually allocated. rnids_init() and rndis_exit() have nothing to do, so they are eliminated. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi