USB: gadget: QDSS: Add snapshot of USB QDSS Function driver

This change adds USB QDSS function driver which is used for
USB QDSS functionality. This snapshot is taken as of msm-3.18
kernel commit d5809484bb1b.

Signed-off-by: Mayank Rana <mrana@codeaurora.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/include/linux/usb/usb_qdss.h b/include/linux/usb/usb_qdss.h
new file mode 100644
index 000000000000..8ce293ecf9dd
--- /dev/null
+++ b/include/linux/usb/usb_qdss.h
@@ -0,0 +1,94 @@
+/* Copyright (c) 2012-2013, The Linux Foundation. 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_QDSS_H
+#define __LINUX_USB_QDSS_H
+
+#include <linux/kernel.h>
+
+struct qdss_request {
+	char *buf;
+	int length;
+	int actual;
+	int status;
+	void *context;
+};
+
+struct usb_qdss_ch {
+	const char *name;
+	struct list_head list;
+	void (*notify)(void *priv, unsigned event, struct qdss_request *d_req,
+		struct usb_qdss_ch *);
+	void *priv;
+	void *priv_usb;
+	int app_conn;
+};
+
+enum qdss_state {
+	USB_QDSS_CONNECT,
+	USB_QDSS_DISCONNECT,
+	USB_QDSS_CTRL_READ_DONE,
+	USB_QDSS_DATA_WRITE_DONE,
+	USB_QDSS_CTRL_WRITE_DONE,
+};
+
+#ifdef CONFIG_USB_G_ANDROID
+struct usb_qdss_ch *usb_qdss_open(const char *name, void *priv,
+	void (*notify)(void *, unsigned, struct qdss_request *,
+		struct usb_qdss_ch *));
+void usb_qdss_close(struct usb_qdss_ch *ch);
+int usb_qdss_alloc_req(struct usb_qdss_ch *ch, int n_write, int n_read);
+void usb_qdss_free_req(struct usb_qdss_ch *ch);
+int usb_qdss_read(struct usb_qdss_ch *ch, struct qdss_request *d_req);
+int usb_qdss_write(struct usb_qdss_ch *ch, struct qdss_request *d_req);
+int usb_qdss_ctrl_write(struct usb_qdss_ch *ch, struct qdss_request *d_req);
+int usb_qdss_ctrl_read(struct usb_qdss_ch *ch, struct qdss_request *d_req);
+#else
+static inline struct usb_qdss_ch *usb_qdss_open(const char *name, void *priv,
+	void (*n)(void *, u32, struct qdss_request *, struct usb_qdss_ch *))
+{
+	return ERR_PTR(-ENODEV);
+}
+
+static inline int usb_qdss_read(struct usb_qdss_ch *c, struct qdss_request *d)
+{
+	return -ENODEV;
+}
+
+static inline int usb_qdss_write(struct usb_qdss_ch *c, struct qdss_request *d)
+{
+	return -ENODEV;
+}
+
+static inline int usb_qdss_ctrl_write(struct usb_qdss_ch *c,
+		struct qdss_request *d)
+{
+	return -ENODEV;
+}
+
+static inline int usb_qdss_ctrl_read(struct usb_qdss_ch *c,
+		struct qdss_request *d)
+{
+	return -ENODEV;
+}
+static inline int usb_qdss_alloc_req(struct usb_qdss_ch *c, int n_wr, int n_rd)
+{
+	return -ENODEV;
+}
+
+
+static inline void usb_qdss_close(struct usb_qdss_ch *ch) { }
+
+static inline void usb_qdss_free_req(struct usb_qdss_ch *ch) { }
+#endif
+
+#endif