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Groups > linux.kernel > #1325346

[PATCH v4 18/43] usb: gadget: composite: usb_get_endpoint_address() function

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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@samsung.com>
---
 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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[PATCH v4 00/43] usb: gadget: composite: introduce new function API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 10/43] usb: gadget: composite: handle vendor descs Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 16/43] usb: gadget: composite: add usb_function_get_ep()  function Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 24/43] usb: gadget: f_rndis: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 18/43] usb: gadget: composite: usb_get_endpoint_address()  function Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 06/43] usb: gadget: composite: introduce new descriptors  format Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
    Re: [PATCH v4 06/43] usb: gadget: composite: introduce new  descriptors format kbuild test robot <lkp@intel.com> - 2016-02-04 06:20 +0100
  [PATCH v4 15/43] usb: gadget: composite: handle get_alt() automatically Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 04/43] usb: gadget: configfs: fix error path Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 37/43] usb: gadget: f_mass_storage: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 23/43] usb: gadget: f_ecm: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 02/43] usb: gadget: f_sourcesink: free requests in  sourcesink_disable() Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 13/43] usb: gadget: composite: enable eps before calling  set_alt() callback Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 32/43] usb: gadget: f_obex: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 20/43] usb: gadget: configfs: add new composite API support Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 27/43] usb: gadget: f_acm: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 26/43] usb: gadget: f_hid: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 30/43] usb: gadget: f_printer: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 08/43] usb: gadget: composite: introduce new USB function ops Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 35/43] usb: gadget: f_uac1: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 31/43] usb: gadget: f_serial: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 42/43] Documentation: update uvc configfs interface  description Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 43/43] usb: gadget: f_uvc: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 25/43] usb: gadget: f_hid: handle requests lifetime properly Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 03/43] usb: gadget: f_loopback: free requests in  loopback_disable() Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 38/43] usb: gadget: u_serial: remove  usb_ep_enable()/usb_ep_disable() Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 34/43] usb: gadget: f_subset: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 29/43] usb: gadget: f_ncm: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 22/43] usb: gadget: f_sourcesink: convert to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 39/43] usb: gadget: u_ether: remove  usb_ep_enable()/usb_ep_disable() Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 40/43] usb: gadget: uvc: fix typo in UVCG_OPTS_ATTR() macro Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 36/43] usb: gadget: f_uac2: conversion to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 41/43] usb: gadget: uvc: simplify descriptors generation Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 13:50 +0100
  [PATCH v4 09/43] usb: gadget: composite: handle function bind Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
    Re: [PATCH v4 09/43] usb: gadget: composite: handle function bind kbuild test robot <lkp@intel.com> - 2016-02-04 06:50 +0100
  [PATCH v4 01/43] usb: gadget: f_sourcesink: make ISO altset  user-selectable Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 12/43] usb: gadget: composite: disable eps before calling  disable() callback Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 17/43] usb: gadget: composite: add usb_get_interface_id()  function Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 19/43] usb: gadget: composite: enable adding USB functions  using new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 05/43] usb: gadget: composite: fix recursive spinlock locking Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 21/43] usb: gadget: f_loopback: convert to new API Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 14/43] usb: gadget: composite: introduce clear_alt()  operation Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 11/43] usb: gadget: composite: generate old descs for  compatibility Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100
  [PATCH v4 07/43] usb: gadget: composite: add functions for descriptors  handling Robert Baldyga <r.baldyga@samsung.com> - 2016-02-03 14:00 +0100

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