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, 420 insertions, 0 deletions

diff --git a/kernel/drivers/isdn/hisax/enternow_pci.c b/kernel/drivers/isdn/hisax/enternow_pci.c
new file mode 100644
index 000000000..e8d431a83
--- /dev/null
+++ b/kernel/drivers/isdn/hisax/enternow_pci.c
@@ -0,0 +1,420 @@
+/* enternow_pci.c,v 0.99 2001/10/02
+ *
+ * enternow_pci.c       Card-specific routines for
+ *                      Formula-n enter:now ISDN PCI ab
+ *                      Gerdes AG Power ISDN PCI
+ *                      Woerltronic SA 16 PCI
+ *                      (based on HiSax driver by Karsten Keil)
+ *
+ * Author               Christoph Ersfeld <info@formula-n.de>
+ *                      Formula-n Europe AG (www.formula-n.com)
+ *                      previously Gerdes AG
+ *
+ *
+ *                      This file is (c) under GNU PUBLIC LICENSE
+ *
+ * Notes:
+ * This driver interfaces to netjet.c which performs B-channel
+ * processing.
+ *
+ * Version 0.99 is the first release of this driver and there are
+ * certainly a few bugs.
+ * It isn't testet on linux 2.4 yet, so consider this code to be
+ * beta.
+ *
+ * Please don't report me any malfunction without sending
+ * (compressed) debug-logs.
+ * It would be nearly impossible to retrace it.
+ *
+ * Log D-channel-processing as follows:
+ *
+ * 1. Load hisax with card-specific parameters, this example ist for
+ *    Formula-n enter:now ISDN PCI and compatible
+ *    (f.e. Gerdes Power ISDN PCI)
+ *
+ *    modprobe hisax type=41 protocol=2 id=gerdes
+ *
+ *    if you chose an other value for id, you need to modify the
+ *    code below, too.
+ *
+ * 2. set debug-level
+ *
+ *    hisaxctrl gerdes 1 0x3ff
+ *    hisaxctrl gerdes 11 0x4f
+ *    cat /dev/isdnctrl >> ~/log &
+ *
+ * Please take also a look into /var/log/messages if there is
+ * anything importand concerning HISAX.
+ *
+ *
+ * Credits:
+ * Programming the driver for Formula-n enter:now ISDN PCI and
+ * necessary the driver for the used Amd 7930 D-channel-controller
+ * was spnsored by Formula-n Europe AG.
+ * Thanks to Karsten Keil and Petr Novak, who gave me support in
+ * Hisax-specific questions.
+ * I want so say special thanks to Carl-Friedrich Braun, who had to
+ * answer a lot of questions about generally ISDN and about handling
+ * of the Amd-Chip.
+ *
+ */
+
+
+#include "hisax.h"
+#include "isac.h"
+#include "isdnl1.h"
+#include "amd7930_fn.h"
+#include <linux/interrupt.h>
+#include <linux/ppp_defs.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include "netjet.h"
+
+
+
+static const char *enternow_pci_rev = "$Revision: 1.1.4.5 $";
+
+
+/* for PowerISDN PCI */
+#define TJ_AMD_IRQ                                              0x20
+#define TJ_LED1                                                 0x40
+#define TJ_LED2                                                 0x80
+
+
+/* The window to [the] AMD [chip]...
+ * From address hw.njet.base + TJ_AMD_PORT onwards, the AMD
+ * maps [consecutive/multiple] 8 bits into the TigerJet I/O space
+ * -> 0x01 of the AMD at hw.njet.base + 0C4 */
+#define TJ_AMD_PORT                                             0xC0
+
+
+
+/* *************************** I/O-Interface functions ************************************* */
+
+
+/* cs->readisac, macro rByteAMD */
+static unsigned char
+ReadByteAmd7930(struct IsdnCardState *cs, unsigned char offset)
+{
+	/* direct register */
+	if (offset < 8)
+		return (inb(cs->hw.njet.isac + 4 * offset));
+
+	/* indirect register */
+	else {
+		outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
+		return (inb(cs->hw.njet.isac + 4 * AMD_DR));
+	}
+}
+
+/* cs->writeisac, macro wByteAMD */
+static void
+WriteByteAmd7930(struct IsdnCardState *cs, unsigned char offset, unsigned char value)
+{
+	/* direct register */
+	if (offset < 8)
+		outb(value, cs->hw.njet.isac + 4 * offset);
+
+	/* indirect register */
+	else {
+		outb(offset, cs->hw.njet.isac + 4 * AMD_CR);
+		outb(value, cs->hw.njet.isac + 4 * AMD_DR);
+	}
+}
+
+
+static void
+enpci_setIrqMask(struct IsdnCardState *cs, unsigned char val) {
+	if (!val)
+		outb(0x00, cs->hw.njet.base + NETJET_IRQMASK1);
+	else
+		outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
+}
+
+
+static unsigned char dummyrr(struct IsdnCardState *cs, int chan, unsigned char off)
+{
+	return (5);
+}
+
+static void dummywr(struct IsdnCardState *cs, int chan, unsigned char off, unsigned char value)
+{
+
+}
+
+
+/* ******************************************************************************** */
+
+
+static void
+reset_enpci(struct IsdnCardState *cs)
+{
+	if (cs->debug & L1_DEB_ISAC)
+		debugl1(cs, "enter:now PCI: reset");
+
+	/* Reset on, (also for AMD) */
+	cs->hw.njet.ctrl_reg = 0x07;
+	outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
+	mdelay(20);
+	/* Reset off */
+	cs->hw.njet.ctrl_reg = 0x30;
+	outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
+	/* 20ms delay */
+	mdelay(20);
+	cs->hw.njet.auxd = 0;  // LED-status
+	cs->hw.njet.dmactrl = 0;
+	outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
+	outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
+	outb(cs->hw.njet.auxd, cs->hw.njet.auxa); // LED off
+}
+
+
+static int
+enpci_card_msg(struct IsdnCardState *cs, int mt, void *arg)
+{
+	u_long flags;
+	unsigned char *chan;
+
+	if (cs->debug & L1_DEB_ISAC)
+		debugl1(cs, "enter:now PCI: card_msg: 0x%04X", mt);
+
+	switch (mt) {
+	case CARD_RESET:
+		spin_lock_irqsave(&cs->lock, flags);
+		reset_enpci(cs);
+		Amd7930_init(cs);
+		spin_unlock_irqrestore(&cs->lock, flags);
+		break;
+	case CARD_RELEASE:
+		release_io_netjet(cs);
+		break;
+	case CARD_INIT:
+		reset_enpci(cs);
+		inittiger(cs);
+		/* irq must be on here */
+		Amd7930_init(cs);
+		break;
+	case CARD_TEST:
+		break;
+	case MDL_ASSIGN:
+		/* TEI assigned, LED1 on */
+		cs->hw.njet.auxd = TJ_AMD_IRQ << 1;
+		outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
+		break;
+	case MDL_REMOVE:
+		/* TEI removed, LEDs off */
+		cs->hw.njet.auxd = 0;
+		outb(0x00, cs->hw.njet.base + NETJET_AUXDATA);
+		break;
+	case MDL_BC_ASSIGN:
+		/* activate B-channel */
+		chan = (unsigned char *)arg;
+
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "enter:now PCI: assign phys. BC %d in AMD LMR1", *chan);
+
+		cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 | (*chan + 1)), "MDL_BC_ASSIGN");
+		/* at least one b-channel in use, LED 2 on */
+		cs->hw.njet.auxd |= TJ_AMD_IRQ << 2;
+		outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
+		break;
+	case MDL_BC_RELEASE:
+		/* deactivate B-channel */
+		chan = (unsigned char *)arg;
+
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "enter:now PCI: release phys. BC %d in Amd LMR1", *chan);
+
+		cs->dc.amd7930.ph_command(cs, (cs->dc.amd7930.lmr1 & ~(*chan + 1)), "MDL_BC_RELEASE");
+		/* no b-channel active -> LED2 off */
+		if (!(cs->dc.amd7930.lmr1 & 3)) {
+			cs->hw.njet.auxd &= ~(TJ_AMD_IRQ << 2);
+			outb(cs->hw.njet.auxd, cs->hw.njet.base + NETJET_AUXDATA);
+		}
+		break;
+	default:
+		break;
+
+	}
+	return (0);
+}
+
+static irqreturn_t
+enpci_interrupt(int intno, void *dev_id)
+{
+	struct IsdnCardState *cs = dev_id;
+	unsigned char s0val, s1val, ir;
+	u_long flags;
+
+	spin_lock_irqsave(&cs->lock, flags);
+	s1val = inb(cs->hw.njet.base + NETJET_IRQSTAT1);
+
+	/* AMD threw an interrupt */
+	if (!(s1val & TJ_AMD_IRQ)) {
+		/* read and clear interrupt-register */
+		ir = ReadByteAmd7930(cs, 0x00);
+		Amd7930_interrupt(cs, ir);
+		s1val = 1;
+	} else
+		s1val = 0;
+	s0val = inb(cs->hw.njet.base + NETJET_IRQSTAT0);
+	if ((s0val | s1val) == 0) { // shared IRQ
+		spin_unlock_irqrestore(&cs->lock, flags);
+		return IRQ_NONE;
+	}
+	if (s0val)
+		outb(s0val, cs->hw.njet.base + NETJET_IRQSTAT0);
+
+	/* DMA-Interrupt: B-channel-stuff */
+	/* set bits in sval to indicate which page is free */
+	if (inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR) <
+	    inl(cs->hw.njet.base + NETJET_DMA_WRITE_IRQ))
+		/* the 2nd write page is free */
+		s0val = 0x08;
+	else	/* the 1st write page is free */
+		s0val = 0x04;
+	if (inl(cs->hw.njet.base + NETJET_DMA_READ_ADR) <
+	    inl(cs->hw.njet.base + NETJET_DMA_READ_IRQ))
+		/* the 2nd read page is free */
+		s0val = s0val | 0x02;
+	else	/* the 1st read page is free */
+		s0val = s0val | 0x01;
+	if (s0val != cs->hw.njet.last_is0) /* we have a DMA interrupt */
+	{
+		if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+			spin_unlock_irqrestore(&cs->lock, flags);
+			return IRQ_HANDLED;
+		}
+		cs->hw.njet.irqstat0 = s0val;
+		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_READ) !=
+		    (cs->hw.njet.last_is0 & NETJET_IRQM0_READ))
+			/* we have a read dma int */
+			read_tiger(cs);
+		if ((cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE) !=
+		    (cs->hw.njet.last_is0 & NETJET_IRQM0_WRITE))
+			/* we have a write dma int */
+			write_tiger(cs);
+		test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+	}
+	spin_unlock_irqrestore(&cs->lock, flags);
+	return IRQ_HANDLED;
+}
+
+static int en_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
+{
+	if (pci_enable_device(dev_netjet))
+		return (0);
+	cs->irq = dev_netjet->irq;
+	if (!cs->irq) {
+		printk(KERN_WARNING "enter:now PCI: No IRQ for PCI card found\n");
+		return (0);
+	}
+	cs->hw.njet.base = pci_resource_start(dev_netjet, 0);
+	if (!cs->hw.njet.base) {
+		printk(KERN_WARNING "enter:now PCI: No IO-Adr for PCI card found\n");
+		return (0);
+	}
+	/* checks Sub-Vendor ID because system crashes with Traverse-Card */
+	if ((dev_netjet->subsystem_vendor != 0x55) ||
+	    (dev_netjet->subsystem_device != 0x02)) {
+		printk(KERN_WARNING "enter:now: You tried to load this driver with an incompatible TigerJet-card\n");
+		printk(KERN_WARNING "Use type=20 for Traverse NetJet PCI Card.\n");
+		return (0);
+	}
+
+	return (1);
+}
+
+static void en_cs_init(struct IsdnCard *card, struct IsdnCardState *cs)
+{
+	cs->hw.njet.auxa = cs->hw.njet.base + NETJET_AUXDATA;
+	cs->hw.njet.isac = cs->hw.njet.base + 0xC0; // Fenster zum AMD
+
+	/* Reset an */
+	cs->hw.njet.ctrl_reg = 0x07;  // geändert von 0xff
+	outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
+	/* 20 ms Pause */
+	mdelay(20);
+
+	cs->hw.njet.ctrl_reg = 0x30;  /* Reset Off and status read clear */
+	outb(cs->hw.njet.ctrl_reg, cs->hw.njet.base + NETJET_CTRL);
+	mdelay(10);
+
+	cs->hw.njet.auxd = 0x00; // war 0xc0
+	cs->hw.njet.dmactrl = 0;
+
+	outb(~TJ_AMD_IRQ, cs->hw.njet.base + NETJET_AUXCTRL);
+	outb(TJ_AMD_IRQ, cs->hw.njet.base + NETJET_IRQMASK1);
+	outb(cs->hw.njet.auxd, cs->hw.njet.auxa);
+}
+
+static int en_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
+{
+	const int bytecnt = 256;
+
+	printk(KERN_INFO
+	       "enter:now PCI: PCI card configured at 0x%lx IRQ %d\n",
+	       cs->hw.njet.base, cs->irq);
+	if (!request_region(cs->hw.njet.base, bytecnt, "Fn_ISDN")) {
+		printk(KERN_WARNING
+		       "HiSax: enter:now config port %lx-%lx already in use\n",
+		       cs->hw.njet.base,
+		       cs->hw.njet.base + bytecnt);
+		return (0);
+	}
+
+	setup_Amd7930(cs);
+	cs->hw.njet.last_is0 = 0;
+	/* macro rByteAMD */
+	cs->readisac = &ReadByteAmd7930;
+	/* macro wByteAMD */
+	cs->writeisac = &WriteByteAmd7930;
+	cs->dc.amd7930.setIrqMask = &enpci_setIrqMask;
+
+	cs->BC_Read_Reg  = &dummyrr;
+	cs->BC_Write_Reg = &dummywr;
+	cs->BC_Send_Data = &netjet_fill_dma;
+	cs->cardmsg = &enpci_card_msg;
+	cs->irq_func = &enpci_interrupt;
+	cs->irq_flags |= IRQF_SHARED;
+
+	return (1);
+}
+
+static struct pci_dev *dev_netjet = NULL;
+
+/* called by config.c */
+int setup_enternow_pci(struct IsdnCard *card)
+{
+	int ret;
+	struct IsdnCardState *cs = card->cs;
+	char tmp[64];
+
+#ifdef __BIG_ENDIAN
+#error "not running on big endian machines now"
+#endif
+
+	strcpy(tmp, enternow_pci_rev);
+	printk(KERN_INFO "HiSax: Formula-n Europe AG enter:now ISDN PCI driver Rev. %s\n", HiSax_getrev(tmp));
+	if (cs->typ != ISDN_CTYPE_ENTERNOW)
+		return (0);
+	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+
+	for (;;)
+	{
+		if ((dev_netjet = hisax_find_pci_device(PCI_VENDOR_ID_TIGERJET,
+							PCI_DEVICE_ID_TIGERJET_300,  dev_netjet))) {
+			ret = en_pci_probe(dev_netjet, cs);
+			if (!ret)
+				return (0);
+		} else {
+			printk(KERN_WARNING "enter:now PCI: No PCI card found\n");
+			return (0);
+		}
+
+		en_cs_init(card, cs);
+		break;
+	}
+
+	return en_cs_init_rest(card, cs);
+}