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 <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/gadget/epautoconf.c | 6 ++++++
include/linux/usb/gadget.h | 3 +++
2 files changed, 9 insertions(+)
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 95e1275..f000c73 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -165,6 +165,12 @@ struct usb_ep *usb_ep_autoconfig_ss(
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+ if (gadget->ops->match_ep) {
+ ep = gadget->ops->match_ep(gadget, desc, ep_comp);
+ if (ep)
+ goto found_ep;
+ }
+
/* First, apply chip-specific "best usage" knowledge.
* This might make a good usb_gadget_ops hook ...
*/
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 82b5bcb..303214b 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -534,6 +534,9 @@ 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 *);
};
/**
--
1.9.1
--
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