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, 115 insertions, 0 deletions

diff --git a/kernel/drivers/media/pci/bt8xx/bttv-if.c b/kernel/drivers/media/pci/bt8xx/bttv-if.c
new file mode 100644
index 000000000..538652e16
--- /dev/null
+++ b/kernel/drivers/media/pci/bt8xx/bttv-if.c
@@ -0,0 +1,115 @@
+/*
+
+    bttv-if.c  --  old gpio interface to other kernel modules
+		   don't use in new code, will go away in 2.7
+		   have a look at bttv-gpio.c instead.
+
+    bttv - Bt848 frame grabber driver
+
+    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
+			   & Marcus Metzler (mocm@thp.uni-koeln.de)
+    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "bttvp.h"
+
+EXPORT_SYMBOL(bttv_get_pcidev);
+EXPORT_SYMBOL(bttv_gpio_enable);
+EXPORT_SYMBOL(bttv_read_gpio);
+EXPORT_SYMBOL(bttv_write_gpio);
+
+/* ----------------------------------------------------------------------- */
+/* Exported functions - for other modules which want to access the         */
+/*                      gpio ports (IR for example)                        */
+/*                      see bttv.h for comments                            */
+
+struct pci_dev* bttv_get_pcidev(unsigned int card)
+{
+	if (card >= bttv_num)
+		return NULL;
+	if (!bttvs[card])
+		return NULL;
+
+	return bttvs[card]->c.pci;
+}
+
+
+int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+	gpio_inout(mask,data);
+	if (bttv_gpio)
+		bttv_gpio_tracking(btv,"extern enable");
+	return 0;
+}
+
+int bttv_read_gpio(unsigned int card, unsigned long *data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+	if(btv->shutdown) {
+		return -ENODEV;
+	}
+
+/* prior setting BT848_GPIO_REG_INP is (probably) not needed
+   because we set direct input on init */
+	*data = gpio_read();
+	return 0;
+}
+
+int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+/* prior setting BT848_GPIO_REG_INP is (probably) not needed
+   because direct input is set on init */
+	gpio_bits(mask,data);
+	if (bttv_gpio)
+		bttv_gpio_tracking(btv,"extern write");
+	return 0;
+}