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usb: gadget: Add match_ep() op to usb_gadget_ops

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Add match_ep() op to usb_gadget_ops similar to Linux kernel which is
useful in finding a suitable ep match for the function driver. This will
avoid adding more gadget_is_xxx() handling code to usb_ep_autoconfig().

Also sync usb_ep_caps struct thats is usually used in the match_ep()
callback by the gadget controller driver

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Vignesh Raghavendra 2019-10-01 17:26:31 +05:30 committed by Marek Vasut
parent c93e305af7
commit 77dcbdf3c1
2 changed files with 26 additions and 0 deletions
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3
drivers/usb/gadget/epautoconf.c
View File

@ -282,6 +282,9 @@ struct usb_ep *usb_ep_autoconfig(
return ep;
}
if (gadget->ops->match_ep)
ep = gadget->ops->match_ep(gadget, desc, NULL);
/* Second, look at endpoints until an unclaimed one looks usable */
list_for_each_entry(ep, &gadget->ep_list, ep_list) {
if (ep_matches(gadget, ep, desc))

23
include/linux/usb/gadget.h
View File

@ -129,11 +129,30 @@ struct usb_ep_ops {
void (*fifo_flush) (struct usb_ep *ep);
};
/**
* struct usb_ep_caps - endpoint capabilities description
* @type_control:Endpoint supports control type (reserved for ep0).
* @type_iso:Endpoint supports isochronous transfers.
* @type_bulk:Endpoint supports bulk transfers.
* @type_int:Endpoint supports interrupt transfers.
* @dir_in:Endpoint supports IN direction.
* @dir_out:Endpoint supports OUT direction.
*/
struct usb_ep_caps {
unsigned type_control:1;
unsigned type_iso:1;
unsigned type_bulk:1;
unsigned type_int:1;
unsigned dir_in:1;
unsigned dir_out:1;
};
/**
* struct usb_ep - device side representation of USB endpoint
* @name:identifier for the endpoint, such as "ep-a" or "ep9in-bulk"
* @ops: Function pointers used to access hardware-specific operations.
* @ep_list:the gadget's ep_list holds all of its endpoints
* @caps:The structure describing types and directions supported by endoint.
* @maxpacket:The maximum packet size used on this endpoint. The initial
* value can sometimes be reduced (hardware allowing), according to
* the endpoint descriptor used to configure the endpoint.
@ -159,6 +178,7 @@ struct usb_ep {
const char *name;
const struct usb_ep_ops *ops;
struct list_head ep_list;
struct usb_ep_caps caps;
unsigned maxpacket:16;
unsigned maxpacket_limit:16;
unsigned max_streams:16;
@ -447,6 +467,9 @@ struct usb_gadget_ops {
int (*udc_start)(struct usb_gadget *,
struct usb_gadget_driver *);
int (*udc_stop)(struct usb_gadget *);
struct usb_ep *(*match_ep)(struct usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
};
/**