talos-op-linux/include/linux/usb/gadget.h, branch v4.4.17

usb: gadget: introduce 'enabled' flag in struct usb_ep

2015-09-27T15:54:31+00:00

This patch introduces 'enabled' flag in struct usb_ep, and modifies usb_ep_enable() and usb_ep_disable() functions to encapsulate endpoint enabled/disabled state. It helps to avoid enabling endpoints which are already enabled, and disabling endpoints which are already disables. From now USB functions don't have to remember current endpoint enable/disable state, as this state is now handled automatically which makes this API less bug-prone. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: epautoconf: add usb_ep_autoconfig_release() function

2015-09-27T15:54:31+00:00

This patch introduces usb_ep_autoconfig_release() function which allows to release endpoint previously obtained from usb_ep_autoconfig() during USB function bind. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: move find_ep() from epautoconf to udc-core

2015-08-06T14:33:14+00:00

Move find_ep() to udc-core and rename it to gadget_find_ep_by_name(). It can be used in UDC drivers, especially in 'match_ep' callback after moving chip-specific endpoint matching logic from epautoconf to UDC drivers. Replace all calls of find_ep() function with gadget_find_ep_by_name(). Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: move ep_matches() from epautoconf to udc-core

2015-08-06T14:32:57+00:00

Move ep_matches() function to udc-core and rename it to usb_gadget_ep_match_desc(). This function can be used by UDC drivers in 'match_ep' callback to avoid writing lots of repetitive code. Replace all calls of ep_matches() with usb_gadget_ep_match_desc(). Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: add 'ep_match' callback to usb_gadget_ops

2015-08-06T14:31:45+00:00

Add callback that is called by epautoconf to allow UDC driver match the best endpoint for specific descriptor. It's intended to supply mechanism which allows to get rid of chip-specific endpoint matching code from epautoconf. If gadget has set 'ep_match' callback we prefer to call it first, and if it fails to find matching endpoint, then we try to use default matching algorithm. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: add endpoint capabilities helper macros

2015-08-04T17:25:09+00:00

Add macros useful while initializing array of endpoint capabilities structures. These macros makes structure initialization more compact to decrease number of code lines and increase readability of code. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: add endpoint capabilities flags

2015-08-04T17:24:46+00:00

Introduce struct usb_ep_caps which contains information about capabilities of usb endpoints - supported transfer types and directions. This structure should be filled by UDC driver for each of its endpoints, and will be used in epautoconf in new ep matching mechanism which will replace ugly guessing of endpoint capabilities basing on its name. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: encapsulate endpoint claiming mechanism

2015-08-04T17:24:05+00:00

So far it was necessary for usb functions to set ep->driver_data in endpoint obtained from autoconfig to non-null value, to indicate that endpoint is claimed by function (in autoconfig it was checked if endpoint has set this field to non-null value, and if it has, it was assumed that it is claimed). It could cause bugs because if some function doesn't set this field autoconfig could return the same endpoint more than one time. To help to avoid such bugs this patch adds claimed flag to struct usb_ep, and encapsulates endpoint claiming mechanism inside usb_ep_autoconfig_ss() and usb_ep_autoconfig_reset(), so now usb functions don't need to perform any additional actions to mark endpoint obtained from autoconfig as claimed. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: add 'quirk_zlp_not_supp' to usb_gadget

2015-07-30T16:43:35+00:00

Due to some UDC controllers may not support zlp, usb gadget layer needs to provide a generic way to inform gadget functions about non-standard hardware limitations. This patch adds 'quirk_zlp_not_supp' field to struct usb_gadget and helper function gadget_is_zlp_supported(). It also sets 'quirk_zlp_not_supp' to 1 in musb UDC driver, which has such limitation. [ balbi@ti.com : make it build ] Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi

usb: gadget: add 'quirk_stall_not_supp' to usb_gadget

2015-07-30T16:43:35+00:00

Due to some UDC controllers may not support stalling, usb gadget layer needs to provide a generic way to inform gadget functions about non-standard hardware limitations. This patch adds 'quirk_stall_not_supp' field to struct usb_gadget and helper function gadget_is_stall_supported(). It also sets 'quirk_stall_not_supp' to 1 in at91_udc driver, which has such limitation. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi