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, 129 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/rt2x00/rt2x00firmware.c b/kernel/drivers/net/wireless/rt2x00/rt2x00firmware.c
new file mode 100644
index 000000000..5813300f6
--- /dev/null
+++ b/kernel/drivers/net/wireless/rt2x00/rt2x00firmware.c
@@ -0,0 +1,129 @@
+/*
+	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
+	<http://rt2x00.serialmonkey.com>
+
+	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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 firmware loading routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
+{
+	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
+	const struct firmware *fw;
+	char *fw_name;
+	int retval;
+
+	/*
+	 * Read correct firmware from harddisk.
+	 */
+	fw_name = rt2x00dev->ops->lib->get_firmware_name(rt2x00dev);
+	if (!fw_name) {
+		rt2x00_err(rt2x00dev,
+			   "Invalid firmware filename\n"
+			   "Please file bug report to %s\n", DRV_PROJECT);
+		return -EINVAL;
+	}
+
+	rt2x00_info(rt2x00dev, "Loading firmware file '%s'\n", fw_name);
+
+	retval = request_firmware(&fw, fw_name, device);
+	if (retval) {
+		rt2x00_err(rt2x00dev, "Failed to request Firmware\n");
+		return retval;
+	}
+
+	if (!fw || !fw->size || !fw->data) {
+		rt2x00_err(rt2x00dev, "Failed to read Firmware\n");
+		release_firmware(fw);
+		return -ENOENT;
+	}
+
+	rt2x00_info(rt2x00dev, "Firmware detected - version: %d.%d\n",
+		    fw->data[fw->size - 4], fw->data[fw->size - 3]);
+	snprintf(rt2x00dev->hw->wiphy->fw_version,
+			sizeof(rt2x00dev->hw->wiphy->fw_version), "%d.%d",
+			fw->data[fw->size - 4], fw->data[fw->size - 3]);
+
+	retval = rt2x00dev->ops->lib->check_firmware(rt2x00dev, fw->data, fw->size);
+	switch (retval) {
+	case FW_OK:
+		break;
+	case FW_BAD_CRC:
+		rt2x00_err(rt2x00dev, "Firmware checksum error\n");
+		goto exit;
+	case FW_BAD_LENGTH:
+		rt2x00_err(rt2x00dev, "Invalid firmware file length (len=%zu)\n",
+			   fw->size);
+		goto exit;
+	case FW_BAD_VERSION:
+		rt2x00_err(rt2x00dev, "Current firmware does not support detected chipset\n");
+		goto exit;
+	}
+
+	rt2x00dev->fw = fw;
+
+	return 0;
+
+exit:
+	release_firmware(fw);
+
+	return -ENOENT;
+}
+
+int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
+{
+	int retval;
+
+	if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_FIRMWARE))
+		return 0;
+
+	if (!rt2x00dev->fw) {
+		retval = rt2x00lib_request_firmware(rt2x00dev);
+		if (retval)
+			return retval;
+	}
+
+	/*
+	 * Send firmware to the device.
+	 */
+	retval = rt2x00dev->ops->lib->load_firmware(rt2x00dev,
+						    rt2x00dev->fw->data,
+						    rt2x00dev->fw->size);
+
+	/*
+	 * When the firmware is uploaded to the hardware the LED
+	 * association status might have been triggered, for correct
+	 * LED handling it should now be reset.
+	 */
+	rt2x00leds_led_assoc(rt2x00dev, false);
+
+	return retval;
+}
+
+void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
+{
+	release_firmware(rt2x00dev->fw);
+	rt2x00dev->fw = NULL;
+}