usb: gadget: add u_qc_ether - QC Ethernet-over-USB link layer utilities.
This utilities is based on Ethernet-over-USB link layer utilities and
contains QC specific implementation (using SPS BAM-to-BAM for data
channel).
Change-Id: Iec417b4df57c34d1ba9368495c7a489c36ddf6dc
Signed-off-by: Ofir Cohen <ofirc@codeaurora.org>
diff --git a/drivers/usb/gadget/u_qc_ether.h b/drivers/usb/gadget/u_qc_ether.h
new file mode 100644
index 0000000..b3c281b
--- /dev/null
+++ b/drivers/usb/gadget/u_qc_ether.h
@@ -0,0 +1,97 @@
+/*
+ * u_qc_ether.h -- interface to USB gadget "ethernet link" utilities
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __U_QC_ETHER_H
+#define __U_QC_ETHER_H
+
+#include <linux/err.h>
+#include <linux/if_ether.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+
+#include "gadget_chips.h"
+
+
+/*
+ * This represents the USB side of an "ethernet" link, managed by a USB
+ * function which provides control and (maybe) framing. Two functions
+ * in different configurations could share the same ethernet link/netdev,
+ * using different host interaction models.
+ *
+ * There is a current limitation that only one instance of this link may
+ * be present in any given configuration. When that's a problem, network
+ * layer facilities can be used to package multiple logical links on this
+ * single "physical" one.
+ *
+ * This function is based on Ethernet-over-USB link layer utilities and
+ * contains MSM specific implementation.
+ */
+
+struct qc_gether {
+ struct usb_function func;
+
+ /* updated by gether_{connect,disconnect} */
+ struct eth_qc_dev *ioport;
+
+ /* endpoints handle full and/or high speeds */
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+
+ bool is_zlp_ok;
+
+ u16 cdc_filter;
+
+ /* hooks for added framing, as needed for RNDIS and EEM. */
+ u32 header_len;
+ /* NCM requires fixed size bundles */
+ bool is_fixed;
+ u32 fixed_out_len;
+ u32 fixed_in_len;
+ struct sk_buff *(*wrap)(struct qc_gether *port,
+ struct sk_buff *skb);
+ int (*unwrap)(struct qc_gether *port,
+ struct sk_buff *skb,
+ struct sk_buff_head *list);
+
+ /* called on network open/close */
+ void (*open)(struct qc_gether *);
+ void (*close)(struct qc_gether *);
+};
+
+/* netdev setup/teardown as directed by the gadget driver */
+int gether_qc_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]);
+void gether_qc_cleanup(void);
+/* variant of gether_setup that allows customizing network device name */
+int gether_qc_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
+ const char *netname);
+
+/* connect/disconnect is handled by individual functions */
+struct net_device *gether_qc_connect(struct qc_gether *);
+void gether_qc_disconnect(struct qc_gether *);
+
+/* each configuration may bind one instance of an ethernet link */
+int ecm_qc_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
+
+int
+rndis_qc_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
+ u32 vendorID, const char *manufacturer,
+ u8 maxPktPerXfer);
+#endif /* __U_QC_ETHER_H */