Introduce function returning address of given endpoint within the function.
This value can be useful during preparation of class or vendor specific
descriptors in prep_vendor_descs() callback. It can be also necessary
to handle some class or vendor specific setup requests.
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/gadget/composite.c | 20 ++++++++++++++++++++
include/linux/usb/composite.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 7e3721d..417e2f9 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -688,6 +688,26 @@ int usb_get_interface_id(struct usb_function *f, int i)
}
EXPORT_SYMBOL_GPL(usb_get_interface_id);
+int usb_get_endpoint_address(struct usb_function *f, int i, int a, int e)
+{
+ struct usb_composite_ep *ep;
+
+ if (!f->descs)
+ return -ENODEV;
+ if (f->descs->intfs_num <= i)
+ return -ENODEV;
+ if (f->descs->intfs[i]->altsets_num <= a)
+ return -ENODEV;
+ if (f->descs->intfs[i]->altsets[a]->eps_num <= e)
+ return -ENODEV;
+ ep = f->descs->intfs[i]->altsets[a]->eps[e];
+ if (!ep->ep)
+ return -ENODEV;
+
+ return ep->ep->address;
+}
+EXPORT_SYMBOL_GPL(usb_get_endpoint_address);
+
/**
* usb_function_get_ep - obtains endpoint of given index from active
* altsetting of given interface
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index b2fb260..b6f1e0cc 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -427,6 +427,8 @@ int usb_ep_add_vendor_desc(struct usb_function *f, int i, int a, int e,
int usb_get_interface_id(struct usb_function *f, int i);
+int usb_get_endpoint_address(struct usb_function *f, int i, int a, int e);
+
struct usb_ep *usb_function_get_ep(struct usb_function *f, int intf, int ep);
int usb_interface_id(struct usb_configuration *, struct usb_function *);
--
1.9.1
--
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