From: Robert Baldyga <r.baldyga@samsung.com>
To: balbi@ti.com
Cc: gregkh@linuxfoundation.org, Peter.Chen@freescale.com,
        johnyoun@synopsys.com, dahlmann.thomas@arcor.de,
        nicolas.ferre@atmel.com, cernekee@gmail.com, leoli@freescale.com,
        daniel@zonque.org, haojian.zhuang@gmail.com, robert.jarzmik@free.fr,
        michal.simek@xilinx.com, devel@driverdev.osuosl.org,
        linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-omap@vger.kernel.org, linux-geode@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org,
        andrzej.p@samsung.com, m.szyprowski@samsung.com,
        stern@rowland.harvard.edu, petr.cvek@tul.cz,
        Robert Baldyga <r.baldyga@samsung.com>
Subject: [PATCH v5 41/46] usb: gadget: add 'ep_match' callback to usb_gadget_ops
Date: Fri, 31 Jul 2015 16:00:53 +0200
Message-id: <1438351258-31578-42-git-send-email-r.baldyga@samsung.com>
In-reply-to: <1438351258-31578-1-git-send-email-r.baldyga@samsung.com>
References: <1438351258-31578-1-git-send-email-r.baldyga@samsung.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1820
Lines: 54

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@samsung.com>
---
 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 4fa6f5d..1b1fee0 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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