usb: gadget: Add snapshot of DIAG function driver

Add function driver to support Qualcomm diagnostics port over USB.

This snapshot is taken as of msm-3.18 commit:
commit e70ad0cd5e (Promotion of kernel.lnx.3.18-151201)

Change-Id: I51aaa8f6a2e05fc252ea810244ddfc99ca2741cc
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>

1 files changed, 85 insertions, 0 deletions

diff --git a/include/linux/usb/usbdiag.h b/include/linux/usb/usbdiag.h
new file mode 100644
index 000000000000..1be8e634fcda
--- /dev/null
+++ b/include/linux/usb/usbdiag.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2008-2010, 2012-2014, The Linux Foundation.
+ * All rights reserved.
+ *
+ * All source code in this file is licensed under the following license except
+ * where indicated.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License 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.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you can find it at http://www.fsf.org
+ */
+
+#ifndef _DRIVERS_USB_DIAG_H_
+#define _DRIVERS_USB_DIAG_H_
+
+#include <linux/err.h>
+
+#define DIAG_LEGACY		"diag"
+#define DIAG_MDM		"diag_mdm"
+#define DIAG_QSC		"diag_qsc"
+#define DIAG_MDM2		"diag_mdm2"
+
+#define USB_DIAG_CONNECT	0
+#define USB_DIAG_DISCONNECT	1
+#define USB_DIAG_WRITE_DONE	2
+#define USB_DIAG_READ_DONE	3
+
+struct diag_request {
+	char *buf;
+	int length;
+	int actual;
+	int status;
+	void *context;
+};
+
+struct usb_diag_ch {
+	const char *name;
+	struct list_head list;
+	void (*notify)(void *priv, unsigned event, struct diag_request *d_req);
+	void *priv;
+	void *priv_usb;
+};
+
+#ifdef CONFIG_USB_G_ANDROID
+int usb_diag_request_size(struct usb_diag_ch *ch);
+struct usb_diag_ch *usb_diag_open(const char *name, void *priv,
+		void (*notify)(void *, unsigned, struct diag_request *));
+void usb_diag_close(struct usb_diag_ch *ch);
+int usb_diag_alloc_req(struct usb_diag_ch *ch, int n_write, int n_read);
+int usb_diag_read(struct usb_diag_ch *ch, struct diag_request *d_req);
+int usb_diag_write(struct usb_diag_ch *ch, struct diag_request *d_req);
+#else
+static inline struct usb_diag_ch *usb_diag_open(const char *name, void *priv,
+		void (*notify)(void *, unsigned, struct diag_request *))
+{
+	return ERR_PTR(-ENODEV);
+}
+static inline void usb_diag_close(struct usb_diag_ch *ch)
+{
+}
+static inline
+int usb_diag_alloc_req(struct usb_diag_ch *ch, int n_write, int n_read)
+{
+	return -ENODEV;
+}
+static inline
+int usb_diag_read(struct usb_diag_ch *ch, struct diag_request *d_req)
+{
+	return -ENODEV;
+}
+static inline
+int usb_diag_write(struct usb_diag_ch *ch, struct diag_request *d_req)
+{
+	return -ENODEV;
+}
+#endif /* CONFIG_USB_G_ANDROID */
+#endif /* _DRIVERS_USB_DIAG_H_ */