Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 141 insertions, 0 deletions

diff --git a/kernel/drivers/staging/vt6656/firmware.c b/kernel/drivers/staging/vt6656/firmware.c
new file mode 100644
index 000000000..d440f284b
--- /dev/null
+++ b/kernel/drivers/staging/vt6656/firmware.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *
+ * File: baseband.c
+ *
+ * Purpose: Implement functions to access baseband
+ *
+ * Author: Yiching Chen
+ *
+ * Date: May 20, 2004
+ *
+ * Functions:
+ *
+ * Revision History:
+ *
+ */
+
+#include <linux/compiler.h>
+#include "firmware.h"
+#include "usbpipe.h"
+
+#define FIRMWARE_VERSION	0x133		/* version 1.51 */
+#define FIRMWARE_NAME		"vntwusb.fw"
+
+#define FIRMWARE_CHUNK_SIZE	0x400
+
+int vnt_download_firmware(struct vnt_private *priv)
+{
+	struct device *dev = &priv->usb->dev;
+	const struct firmware *fw;
+	int status;
+	void *buffer = NULL;
+	bool result = false;
+	u16 length;
+	int ii, rc;
+
+	dev_dbg(dev, "---->Download firmware\n");
+
+	rc = request_firmware(&fw, FIRMWARE_NAME, dev);
+	if (rc) {
+		dev_err(dev, "firmware file %s request failed (%d)\n",
+			FIRMWARE_NAME, rc);
+			goto out;
+	}
+
+	buffer = kmalloc(FIRMWARE_CHUNK_SIZE, GFP_KERNEL);
+	if (!buffer)
+		goto free_fw;
+
+	for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
+		length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
+		memcpy(buffer, fw->data + ii, length);
+
+		status = vnt_control_out(priv,
+						0,
+						0x1200+ii,
+						0x0000,
+						length,
+						buffer);
+
+		dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
+
+		if (status != STATUS_SUCCESS)
+			goto free_fw;
+	}
+
+	result = true;
+free_fw:
+	release_firmware(fw);
+
+out:
+	kfree(buffer);
+
+	return result;
+}
+MODULE_FIRMWARE(FIRMWARE_NAME);
+
+int vnt_firmware_branch_to_sram(struct vnt_private *priv)
+{
+	int status;
+
+	dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
+
+	status = vnt_control_out(priv,
+					1,
+					0x1200,
+					0x0000,
+					0,
+					NULL);
+	return status == STATUS_SUCCESS;
+}
+
+int vnt_check_firmware_version(struct vnt_private *priv)
+{
+	int status;
+
+	status = vnt_control_in(priv,
+					MESSAGE_TYPE_READ,
+					0,
+					MESSAGE_REQUEST_VERSION,
+					2,
+					(u8 *)&priv->firmware_version);
+
+	dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
+						priv->firmware_version);
+
+	if (status != STATUS_SUCCESS) {
+		dev_dbg(&priv->usb->dev, "Firmware Invalid.\n");
+		return false;
+	}
+	if (priv->firmware_version == 0xFFFF) {
+		dev_dbg(&priv->usb->dev, "In Loader.\n");
+		return false;
+	}
+
+	dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
+						priv->firmware_version);
+
+	if (priv->firmware_version < FIRMWARE_VERSION) {
+		/* branch to loader for download new firmware */
+		vnt_firmware_branch_to_sram(priv);
+		return false;
+	}
+	return true;
+}