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, 87 insertions, 0 deletions

diff --git a/kernel/drivers/usb/musb/blackfin.h b/kernel/drivers/usb/musb/blackfin.h
new file mode 100644
index 000000000..c84dae546
--- /dev/null
+++ b/kernel/drivers/usb/musb/blackfin.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2007 by Analog Devices, Inc.
+ *
+ * The Inventra Controller Driver for Linux 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.
+ */
+
+#ifndef __MUSB_BLACKFIN_H__
+#define __MUSB_BLACKFIN_H__
+
+/*
+ * Blackfin specific definitions
+ */
+
+/* Anomalies notes:
+ *
+ *  05000450 - USB DMA Mode 1 Short Packet Data Corruption:
+ *             MUSB driver is designed to transfer buffer of N * maxpacket size
+ *             in DMA mode 1 and leave the rest of the data to the next
+ *             transfer in DMA mode 0, so we never transmit a short packet in
+ *             DMA mode 1.
+ *
+ *  05000463 - This anomaly doesn't affect this driver since it
+ *             never uses L1 or L2 memory as data destination.
+ *
+ *  05000464 - This anomaly doesn't affect this driver since it
+ *             never uses L1 or L2 memory as data source.
+ *
+ *  05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
+ *             no way to workaround for bulk endpoints.  Since the wMaxPackSize
+ *             of bulk is less than or equal to 512, while the fifo size of
+ *             endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
+ *             automatically when these endpoints are used for bulk OUT.
+ *
+ *  05000466 - This anomaly doesn't affect this driver since it never mixes
+ *             concurrent DMA and core accesses to the TX endpoint FIFOs.
+ *
+ *  05000467 - The workaround for this anomaly will introduce another
+ *             anomaly - 05000465.
+ */
+
+/* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
+ * unstable in host mode.  This may be caused by Anomaly 05000380.  After
+ * digging out the root cause, we will change this number accordingly.
+ * So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
+ */
+#if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
+	!defined(CONFIG_MUSB_PIO_ONLY)
+# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
+#endif
+
+#undef DUMP_FIFO_DATA
+#ifdef DUMP_FIFO_DATA
+static void dump_fifo_data(u8 *buf, u16 len)
+{
+	u8 *tmp = buf;
+	int i;
+
+	for (i = 0; i < len; i++) {
+		if (!(i % 16) && i)
+			pr_debug("\n");
+		pr_debug("%02x ", *tmp++);
+	}
+	pr_debug("\n");
+}
+#else
+#define dump_fifo_data(buf, len)	do {} while (0)
+#endif
+
+
+#define USB_DMA_BASE		USB_DMA_INTERRUPT
+#define USB_DMAx_CTRL		0x04
+#define USB_DMAx_ADDR_LOW	0x08
+#define USB_DMAx_ADDR_HIGH	0x0C
+#define USB_DMAx_COUNT_LOW	0x10
+#define USB_DMAx_COUNT_HIGH	0x14
+
+#define USB_DMA_REG(ep, reg)	(USB_DMA_BASE + 0x20 * ep + reg)
+
+/* Almost 1 second */
+#define TIMER_DELAY	(1 * HZ)
+
+static struct timer_list musb_conn_timer;
+
+#endif	/* __MUSB_BLACKFIN_H__ */