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, 255 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/prism54/isl_38xx.c b/kernel/drivers/net/wireless/prism54/isl_38xx.c
new file mode 100644
index 000000000..333c1a2f8
--- /dev/null
+++ b/kernel/drivers/net/wireless/prism54/isl_38xx.c
@@ -0,0 +1,255 @@
+/*
+ *  Copyright (C) 2002 Intersil Americas Inc.
+ *  Copyright (C) 2003-2004 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>_
+ *
+ *  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
+ *
+ *  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/>.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#include "prismcompat.h"
+#include "isl_38xx.h"
+#include "islpci_dev.h"
+#include "islpci_mgt.h"
+
+/******************************************************************************
+    Device Interface & Control functions
+******************************************************************************/
+
+/**
+ * isl38xx_disable_interrupts - disable all interrupts
+ * @device: pci memory base address
+ *
+ *  Instructs the device to disable all interrupt reporting by asserting
+ *  the IRQ line. New events may still show up in the interrupt identification
+ *  register located at offset %ISL38XX_INT_IDENT_REG.
+ */
+void
+isl38xx_disable_interrupts(void __iomem *device)
+{
+	isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+}
+
+void
+isl38xx_handle_sleep_request(isl38xx_control_block *control_block,
+			     int *powerstate, void __iomem *device_base)
+{
+	/* device requests to go into sleep mode
+	 * check whether the transmit queues for data and management are empty */
+	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ))
+		/* data tx queue not empty */
+		return;
+
+	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
+		/* management tx queue not empty */
+		return;
+
+	/* check also whether received frames are pending */
+	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ))
+		/* data rx queue not empty */
+		return;
+
+	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ))
+		/* management rx queue not empty */
+		return;
+
+#if VERBOSE > SHOW_ERROR_MESSAGES
+	DEBUG(SHOW_TRACING, "Device going to sleep mode\n");
+#endif
+
+	/* all queues are empty, allow the device to go into sleep mode */
+	*powerstate = ISL38XX_PSM_POWERSAVE_STATE;
+
+	/* assert the Sleep interrupt in the Device Interrupt Register */
+	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP,
+			  ISL38XX_DEV_INT_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+}
+
+void
+isl38xx_handle_wakeup(isl38xx_control_block *control_block,
+		      int *powerstate, void __iomem *device_base)
+{
+	/* device is in active state, update the powerstate flag */
+	*powerstate = ISL38XX_PSM_ACTIVE_STATE;
+
+	/* now check whether there are frames pending for the card */
+	if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)
+	    && !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
+		return;
+
+#if VERBOSE > SHOW_ERROR_MESSAGES
+	DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n");
+#endif
+
+	/* either data or management transmit queue has a frame pending
+	 * trigger the device by setting the Update bit in the Device Int reg */
+	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
+			  ISL38XX_DEV_INT_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+}
+
+void
+isl38xx_trigger_device(int asleep, void __iomem *device_base)
+{
+	u32 reg;
+
+#if VERBOSE > SHOW_ERROR_MESSAGES
+	u32 counter = 0;
+	struct timeval current_time;
+	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n");
+#endif
+
+	/* check whether the device is in power save mode */
+	if (asleep) {
+		/* device is in powersave, trigger the device for wakeup */
+#if VERBOSE > SHOW_ERROR_MESSAGES
+		do_gettimeofday(&current_time);
+		DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n",
+		      current_time.tv_sec, (long)current_time.tv_usec);
+
+		DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
+		      current_time.tv_sec, (long)current_time.tv_usec,
+		      readl(device_base + ISL38XX_CTRL_STAT_REG));
+#endif
+
+		reg = readl(device_base + ISL38XX_INT_IDENT_REG);
+		if (reg == 0xabadface) {
+#if VERBOSE > SHOW_ERROR_MESSAGES
+			do_gettimeofday(&current_time);
+			DEBUG(SHOW_TRACING,
+			      "%08li.%08li Device register abadface\n",
+			      current_time.tv_sec, (long)current_time.tv_usec);
+#endif
+			/* read the Device Status Register until Sleepmode bit is set */
+			while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG),
+			       (reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) {
+				udelay(ISL38XX_WRITEIO_DELAY);
+#if VERBOSE > SHOW_ERROR_MESSAGES
+				counter++;
+#endif
+			}
+
+#if VERBOSE > SHOW_ERROR_MESSAGES
+			DEBUG(SHOW_TRACING,
+			      "%08li.%08li Device register read %08x\n",
+			      current_time.tv_sec, (long)current_time.tv_usec,
+			      readl(device_base + ISL38XX_CTRL_STAT_REG));
+			do_gettimeofday(&current_time);
+			DEBUG(SHOW_TRACING,
+			      "%08li.%08li Device asleep counter %i\n",
+			      current_time.tv_sec, (long)current_time.tv_usec,
+			      counter);
+#endif
+		}
+		/* assert the Wakeup interrupt in the Device Interrupt Register */
+		isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP,
+				  ISL38XX_DEV_INT_REG);
+
+#if VERBOSE > SHOW_ERROR_MESSAGES
+		udelay(ISL38XX_WRITEIO_DELAY);
+
+		/* perform another read on the Device Status Register */
+		reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
+		do_gettimeofday(&current_time);
+		DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
+		      current_time.tv_sec, (long)current_time.tv_usec, reg);
+#endif
+	} else {
+		/* device is (still) awake  */
+#if VERBOSE > SHOW_ERROR_MESSAGES
+		DEBUG(SHOW_TRACING, "Device is in active state\n");
+#endif
+		/* trigger the device by setting the Update bit in the Device Int reg */
+
+		isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
+				  ISL38XX_DEV_INT_REG);
+	}
+}
+
+void
+isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address)
+{
+#if VERBOSE > SHOW_ERROR_MESSAGES
+	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n");
+#endif
+
+	/* load the address of the control block in the device */
+	isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+
+	/* set the reset bit in the Device Interrupt Register */
+	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+
+	/* enable the interrupt for detecting initialization */
+
+	/* Note: Do not enable other interrupts here. We want the
+	 * device to have come up first 100% before allowing any other
+	 * interrupts. */
+	isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);  /* allow complete full reset */
+}
+
+void
+isl38xx_enable_common_interrupts(void __iomem *device_base)
+{
+	u32 reg;
+
+	reg = ISL38XX_INT_IDENT_UPDATE | ISL38XX_INT_IDENT_SLEEP |
+	      ISL38XX_INT_IDENT_WAKEUP;
+	isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG);
+	udelay(ISL38XX_WRITEIO_DELAY);
+}
+
+int
+isl38xx_in_queue(isl38xx_control_block *cb, int queue)
+{
+	const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) -
+			   le32_to_cpu(cb->device_curr_frag[queue]));
+
+	/* determine the amount of fragments in the queue depending on the type
+	 * of the queue, either transmit or receive */
+
+	BUG_ON(delta < 0);	/* driver ptr must be ahead of device ptr */
+
+	switch (queue) {
+		/* send queues */
+	case ISL38XX_CB_TX_MGMTQ:
+		BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
+
+	case ISL38XX_CB_TX_DATA_LQ:
+	case ISL38XX_CB_TX_DATA_HQ:
+		BUG_ON(delta > ISL38XX_CB_TX_QSIZE);
+		return delta;
+
+		/* receive queues */
+	case ISL38XX_CB_RX_MGMTQ:
+		BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
+		return ISL38XX_CB_MGMT_QSIZE - delta;
+
+	case ISL38XX_CB_RX_DATA_LQ:
+	case ISL38XX_CB_RX_DATA_HQ:
+		BUG_ON(delta > ISL38XX_CB_RX_QSIZE);
+		return ISL38XX_CB_RX_QSIZE - delta;
+	}
+	BUG();
+	return 0;
+}