1 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/include/mach/usb_bridge.h b/arch/arm/mach-exynos/include/mach/usb_bridge.h
new file mode 100644
index 0000000..1a1c23b
--- /dev/null
+++ b/arch/arm/mach-exynos/include/mach/usb_bridge.h
@@ -0,0 +1,156 @@
+/* Copyright (c) 2011-2012, 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 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+
+#ifndef __LINUX_USB_BRIDGE_H__
+#define __LINUX_USB_BRIDGE_H__
+
+#include <linux/netdevice.h>
+#include <linux/usb.h>
+
+/* bridge device 0: DUN
+ * bridge device 1 : Tethered RMNET
+ */
+#define MAX_BRIDGE_DEVICES 2
+
+struct bridge_ops {
+	int (*send_pkt)(void *, void *, size_t actual);
+	void (*send_cbits)(void *, unsigned int);
+
+	/* flow control */
+	void (*unthrottle_tx)(void *);
+};
+
+#define TX_THROTTLED BIT(0)
+#define RX_THROTTLED BIT(1)
+
+struct bridge {
+	/* context of the gadget port using bridge driver */
+	void *ctx;
+
+	/* bridge device array index mapped to the gadget port array index.
+	 * data bridge[ch_id] <-- bridge --> gadget port[ch_id]
+	 */
+	unsigned int ch_id;
+
+	/* flow control bits */
+	unsigned long flags;
+
+	/* data/ctrl bridge callbacks */
+	struct bridge_ops ops;
+};
+
+/**
+ * timestamp_info: stores timestamp info for skb life cycle during data
+ * transfer for tethered rmnet/DUN.
+ * @created: stores timestamp at the time of creation of SKB.
+ * @rx_queued: stores timestamp when SKB queued to HW to receive
+ * data.
+ * @rx_done: stores timestamp when skb queued to h/w is completed.
+ * @rx_done_sent: stores timestamp when SKB is sent from gadget rmnet/DUN
+ * driver to bridge rmnet/DUN driver or vice versa.
+ * @tx_queued: stores timestamp when SKB is queued to send data.
+ *
+ * note that size of this struct shouldnt exceed 48bytes that's the max skb->cb
+ * holds.
+ */
+struct timestamp_info {
+	struct data_bridge	*dev;
+
+	unsigned int		created;
+	unsigned int		rx_queued;
+	unsigned int		rx_done;
+	unsigned int		rx_done_sent;
+	unsigned int		tx_queued;
+};
+
+/* Maximum timestamp message length */
+#define DBG_DATA_MSG	128UL
+
+/* Maximum timestamp messages */
+#define DBG_DATA_MAX	32UL
+
+/* timestamp buffer descriptor */
+struct timestamp_buf {
+	char		(buf[DBG_DATA_MAX])[DBG_DATA_MSG];   /* buffer */
+	unsigned	idx;   /* index */
+	rwlock_t	lck;   /* lock */
+};
+
+#if defined(CONFIG_USB_QCOM_MDM_BRIDGE) ||	\
+	defined(CONFIG_USB_QCOM_MDM_BRIDGE_MODULE)
+
+/* Bridge APIs called by gadget driver */
+int ctrl_bridge_open(struct bridge *);
+void ctrl_bridge_close(unsigned int);
+int ctrl_bridge_write(unsigned int, char *, size_t);
+int ctrl_bridge_set_cbits(unsigned int, unsigned int);
+unsigned int ctrl_bridge_get_cbits_tohost(unsigned int);
+int data_bridge_open(struct bridge *brdg);
+void data_bridge_close(unsigned int);
+int data_bridge_write(unsigned int , struct sk_buff *);
+int data_bridge_unthrottle_rx(unsigned int);
+
+/* defined in control bridge */
+int ctrl_bridge_probe(struct usb_interface *, struct usb_host_endpoint *, int);
+void ctrl_bridge_disconnect(unsigned int);
+int ctrl_bridge_resume(unsigned int);
+int ctrl_bridge_suspend(unsigned int);
+
+#else
+
+static inline int __maybe_unused ctrl_bridge_open(struct bridge *brdg)
+{
+	return -ENODEV;
+}
+
+static inline void __maybe_unused ctrl_bridge_close(unsigned int id) { }
+
+static inline int __maybe_unused ctrl_bridge_write(unsigned int id,
+						char *data, size_t size)
+{
+	return -ENODEV;
+}
+
+static inline int __maybe_unused ctrl_bridge_set_cbits(unsigned int id,
+					unsigned int cbits)
+{
+	return -ENODEV;
+}
+
+static inline unsigned int __maybe_unused
+ctrl_bridge_get_cbits_tohost(unsigned int id)
+{
+	return -ENODEV;
+}
+
+static inline int __maybe_unused data_bridge_open(struct bridge *brdg)
+{
+	return -ENODEV;
+}
+
+static inline void __maybe_unused data_bridge_close(unsigned int id) { }
+
+static inline int __maybe_unused data_bridge_write(unsigned int id,
+					    struct sk_buff *skb)
+{
+	return -ENODEV;
+}
+
+static inline int __maybe_unused data_bridge_unthrottle_rx(unsigned int id)
+{
+	return -ENODEV;
+}
+
+#endif
+
+#endif