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, 247 insertions, 0 deletions

diff --git a/kernel/drivers/isdn/sc/interrupt.c b/kernel/drivers/isdn/sc/interrupt.c
new file mode 100644
index 000000000..e80cc76bc
--- /dev/null
+++ b/kernel/drivers/isdn/sc/interrupt.c
@@ -0,0 +1,247 @@
+/* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
+ *
+ * Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * For more information, please contact gpl-info@spellcast.com or write:
+ *
+ *     SpellCaster Telecommunications Inc.
+ *     5621 Finch Avenue East, Unit #3
+ *     Scarborough, Ontario  Canada
+ *     M1B 2T9
+ *     +1 (416) 297-8565
+ *     +1 (416) 297-6433 Facsimile
+ */
+
+#include "includes.h"
+#include "hardware.h"
+#include "message.h"
+#include "card.h"
+#include <linux/interrupt.h>
+
+/*
+ *
+ */
+irqreturn_t interrupt_handler(int dummy, void *card_inst)
+{
+
+	RspMessage rcvmsg;
+	int channel;
+	int card = (int)(unsigned long) card_inst;
+
+	if (!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+		return IRQ_NONE;
+	}
+
+	pr_debug("%s: Entered Interrupt handler\n",
+		 sc_adapter[card]->devicename);
+
+	/*
+	 * Pull all of the waiting messages off the response queue
+	 */
+	while (!receivemessage(card, &rcvmsg)) {
+		/*
+		 * Push the message to the adapter structure for
+		 * send_and_receive to snoop
+		 */
+		if (sc_adapter[card]->want_async_messages)
+			memcpy(&(sc_adapter[card]->async_msg),
+			       &rcvmsg, sizeof(RspMessage));
+
+		channel = (unsigned int) rcvmsg.phy_link_no;
+
+		/*
+		 * Trap Invalid request messages
+		 */
+		if (IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
+			pr_debug("%s: Invalid request Message, rsp_status = %d\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.rsp_status);
+			break;
+		}
+
+		/*
+		 * Check for a linkRead message
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
+		{
+			pr_debug("%s: Received packet 0x%x bytes long at 0x%lx\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.msg_data.response.msg_len,
+				 rcvmsg.msg_data.response.buff_offset);
+			rcvpkt(card, &rcvmsg);
+			continue;
+
+		}
+
+		/*
+		 * Handle a write acknoledgement
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
+			pr_debug("%s: Packet Send ACK on channel %d\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.phy_link_no);
+			sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].free_sendbufs++;
+			continue;
+		}
+
+		/*
+		 * Handle a connection message
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
+		{
+			unsigned int callid;
+			setup_parm setup;
+			pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.phy_link_no,
+				 rcvmsg.rsp_status,
+				 rcvmsg.msg_data.byte_array[2]);
+
+			memcpy(&callid, rcvmsg.msg_data.byte_array, sizeof(int));
+			if (callid >= 0x8000 && callid <= 0xFFFF)
+			{
+				pr_debug("%s: Got Dial-Out Rsp\n",
+					 sc_adapter[card]->devicename);
+				indicate_status(card, ISDN_STAT_DCONN,
+						(unsigned long)rcvmsg.phy_link_no - 1, NULL);
+
+			}
+			else if (callid >= 0x0000 && callid <= 0x7FFF)
+			{
+				int len;
+
+				pr_debug("%s: Got Incoming Call\n",
+					 sc_adapter[card]->devicename);
+				len = strlcpy(setup.phone, &(rcvmsg.msg_data.byte_array[4]),
+					      sizeof(setup.phone));
+				if (len >= sizeof(setup.phone))
+					continue;
+				len = strlcpy(setup.eazmsn,
+					      sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
+					      sizeof(setup.eazmsn));
+				if (len >= sizeof(setup.eazmsn))
+					continue;
+				setup.si1 = 7;
+				setup.si2 = 0;
+				setup.plan = 0;
+				setup.screen = 0;
+
+				indicate_status(card, ISDN_STAT_ICALL, (unsigned long)rcvmsg.phy_link_no - 1, (char *)&setup);
+				indicate_status(card, ISDN_STAT_DCONN, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
+			}
+			continue;
+		}
+
+		/*
+		 * Handle a disconnection message
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
+		{
+			pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.phy_link_no,
+				 rcvmsg.rsp_status,
+				 rcvmsg.msg_data.byte_array[2]);
+
+			indicate_status(card, ISDN_STAT_BHUP, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
+			indicate_status(card, ISDN_STAT_DHUP, (unsigned long)rcvmsg.phy_link_no - 1, NULL);
+			continue;
+
+		}
+
+		/*
+		 * Handle a startProc engine up message
+		 */
+		if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
+			pr_debug("%s: Received EngineUp message\n",
+				 sc_adapter[card]->devicename);
+			sc_adapter[card]->EngineUp = 1;
+			sendmessage(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetMyNumber, 1, 0, NULL);
+			sendmessage(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetMyNumber, 2, 0, NULL);
+			init_timer(&sc_adapter[card]->stat_timer);
+			sc_adapter[card]->stat_timer.function = check_phystat;
+			sc_adapter[card]->stat_timer.data = card;
+			sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
+			add_timer(&sc_adapter[card]->stat_timer);
+			continue;
+		}
+
+		/*
+		 * Start proc response
+		 */
+		if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
+			pr_debug("%s: StartProc Response Status %d\n",
+				 sc_adapter[card]->devicename,
+				 rcvmsg.rsp_status);
+			continue;
+		}
+
+		/*
+		 * Handle a GetMyNumber Rsp
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Call, 0, GetMyNumber)) {
+			strlcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no - 1].dn,
+				rcvmsg.msg_data.byte_array,
+				sizeof(rcvmsg.msg_data.byte_array));
+			continue;
+		}
+
+		/*
+		 * PhyStatus response
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
+			unsigned int b1stat, b2stat;
+
+			/*
+			 * Covert the message data to the adapter->phystat code
+			 */
+			b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
+			b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
+
+			sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
+			pr_debug("%s: PhyStat is 0x%2x\n",
+				 sc_adapter[card]->devicename,
+				 sc_adapter[card]->nphystat);
+			continue;
+		}
+
+
+		/*
+		 * Handle a GetFramFormat
+		 */
+		if (IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
+			if (rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
+				unsigned int proto = HDLC_PROTO;
+				/*
+				 * Set board format to HDLC if it wasn't already
+				 */
+				pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
+					 sc_adapter[card]->devicename,
+					 rcvmsg.msg_data.byte_array[0]);
+				sendmessage(card, CEPID, ceReqTypeCall,
+					    ceReqClass0,
+					    ceReqCallSetFrameFormat,
+					    (unsigned char)channel + 1,
+					    1, &proto);
+			}
+			continue;
+		}
+
+		/*
+		 * Hmm...
+		 */
+		pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
+			 sc_adapter[card]->devicename,
+			 rcvmsg.type, rcvmsg.class, rcvmsg.code,
+			 rcvmsg.phy_link_no);
+
+	}	/* while */
+
+	pr_debug("%s: Exiting Interrupt Handler\n",
+		 sc_adapter[card]->devicename);
+	return IRQ_HANDLED;
+}