X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fisdn%2Fhisax%2Fnj_s.c;fp=kernel%2Fdrivers%2Fisdn%2Fhisax%2Fnj_s.c;h=32b4bbd18eb9237208eb13f4c95e567bd237b750;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git

diff --git a/kernel/drivers/isdn/hisax/nj_s.c b/kernel/drivers/isdn/hisax/nj_s.c
new file mode 100644
index 000000000..32b4bbd18
--- /dev/null
+++ b/kernel/drivers/isdn/hisax/nj_s.c
@@ -0,0 +1,294 @@
+/* $Id: nj_s.c,v 2.13.2.4 2004/01/16 01:53:48 keil Exp $
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#include <linux/init.h>
+#include "hisax.h"
+#include "isac.h"
+#include "isdnl1.h"
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/ppp_defs.h>
+#include "netjet.h"
+
+static const char *NETjet_S_revision = "$Revision: 2.13.2.4 $";
+
+static u_char dummyrr(struct IsdnCardState *cs, int chan, u_char off)
+{
+	return (5);
+}
+
+static void dummywr(struct IsdnCardState *cs, int chan, u_char off, u_char value)
+{
+}
+
+static irqreturn_t
+netjet_s_interrupt(int intno, void *dev_id)
+{
+	struct IsdnCardState *cs = dev_id;
+	u_char val, s1val, s0val;
+	u_long flags;
+
+	spin_lock_irqsave(&cs->lock, flags);
+	s1val = bytein(cs->hw.njet.base + NETJET_IRQSTAT1);
+	if (!(s1val & NETJET_ISACIRQ)) {
+		val = NETjet_ReadIC(cs, ISAC_ISTA);
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "tiger: i1 %x %x", s1val, val);
+		if (val) {
+			isac_interrupt(cs, val);
+			NETjet_WriteIC(cs, ISAC_MASK, 0xFF);
+			NETjet_WriteIC(cs, ISAC_MASK, 0x0);
+		}
+		s1val = 1;
+	} else
+		s1val = 0;
+	/*
+	 * read/write stat0 is better, because lower IRQ rate
+	 * Note the IRQ is on for 125 us if a condition match
+	 * thats long on modern CPU and so the IRQ is reentered
+	 * all the time.
+	 */
+	s0val = bytein(cs->hw.njet.base + NETJET_IRQSTAT0);
+	if ((s0val | s1val) == 0) { // shared IRQ
+		spin_unlock_irqrestore(&cs->lock, flags);
+		return IRQ_NONE;
+	}
+	if (s0val)
+		byteout(cs->hw.njet.base + NETJET_IRQSTAT0, s0val);
+	/* start new code 13/07/00 GE */
+	/* 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 |= 0x02;
+	else	/* the 1st read page is free */
+		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)) {
+			printk(KERN_WARNING "nj LOCK_ATOMIC s0val %x->%x\n",
+			       cs->hw.njet.last_is0, s0val);
+			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);
+		/* end new code 13/07/00 GE */
+		test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+	}
+	spin_unlock_irqrestore(&cs->lock, flags);
+	return IRQ_HANDLED;
+}
+
+static void
+reset_netjet_s(struct IsdnCardState *cs)
+{
+	cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
+	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
+	mdelay(10);
+	/* now edge triggered for TJ320 GE 13/07/00 */
+	/* see comment in IRQ function */
+	if (cs->subtyp) /* TJ320 */
+		cs->hw.njet.ctrl_reg = 0x40;  /* Reset Off and status read clear */
+	else
+		cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
+	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
+	mdelay(10);
+	cs->hw.njet.auxd = 0;
+	cs->hw.njet.dmactrl = 0;
+	byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
+	byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
+	byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
+}
+
+static int
+NETjet_S_card_msg(struct IsdnCardState *cs, int mt, void *arg)
+{
+	u_long flags;
+
+	switch (mt) {
+	case CARD_RESET:
+		spin_lock_irqsave(&cs->lock, flags);
+		reset_netjet_s(cs);
+		spin_unlock_irqrestore(&cs->lock, flags);
+		return (0);
+	case CARD_RELEASE:
+		release_io_netjet(cs);
+		return (0);
+	case CARD_INIT:
+		reset_netjet_s(cs);
+		inittiger(cs);
+		spin_lock_irqsave(&cs->lock, flags);
+		clear_pending_isac_ints(cs);
+		initisac(cs);
+		/* Reenable all IRQ */
+		cs->writeisac(cs, ISAC_MASK, 0);
+		spin_unlock_irqrestore(&cs->lock, flags);
+		return (0);
+	case CARD_TEST:
+		return (0);
+	}
+	return (0);
+}
+
+static int njs_pci_probe(struct pci_dev *dev_netjet, struct IsdnCardState *cs)
+{
+	u32 cfg;
+
+	if (pci_enable_device(dev_netjet))
+		return (0);
+	pci_set_master(dev_netjet);
+	cs->irq = dev_netjet->irq;
+	if (!cs->irq) {
+		printk(KERN_WARNING "NETjet-S: 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 "NETjet-S: No IO-Adr for PCI card found\n");
+		return (0);
+	}
+	/* the TJ300 and TJ320 must be detected, the IRQ handling is different
+	 * unfortunately the chips use the same device ID, but the TJ320 has
+	 * the bit20 in status PCI cfg register set
+	 */
+	pci_read_config_dword(dev_netjet, 0x04, &cfg);
+	if (cfg & 0x00100000)
+		cs->subtyp = 1; /* TJ320 */
+	else
+		cs->subtyp = 0; /* TJ300 */
+	/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG www.formula-n.com */
+	if ((dev_netjet->subsystem_vendor == 0x55) &&
+	    (dev_netjet->subsystem_device == 0x02)) {
+		printk(KERN_WARNING "Netjet: You tried to load this driver with an incompatible TigerJet-card\n");
+		printk(KERN_WARNING "Use type=41 for Formula-n enter:now ISDN PCI and compatible\n");
+		return (0);
+	}
+	/* end new code */
+
+	return (1);
+}
+
+static int njs_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 | NETJET_ISAC_OFF;
+
+	cs->hw.njet.ctrl_reg = 0xff;  /* Reset On */
+	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
+	mdelay(10);
+
+	cs->hw.njet.ctrl_reg = 0x00;  /* Reset Off and status read clear */
+	byteout(cs->hw.njet.base + NETJET_CTRL, cs->hw.njet.ctrl_reg);
+	mdelay(10);
+
+	cs->hw.njet.auxd = 0xC0;
+	cs->hw.njet.dmactrl = 0;
+
+	byteout(cs->hw.njet.base + NETJET_AUXCTRL, ~NETJET_ISACIRQ);
+	byteout(cs->hw.njet.base + NETJET_IRQMASK1, NETJET_ISACIRQ);
+	byteout(cs->hw.njet.auxa, cs->hw.njet.auxd);
+
+	switch (((NETjet_ReadIC(cs, ISAC_RBCH) >> 5) & 3))
+	{
+	case 0:
+		return 1;	/* end loop */
+
+	case 3:
+		printk(KERN_WARNING "NETjet-S: NETspider-U PCI card found\n");
+		return -1;	/* continue looping */
+
+	default:
+		printk(KERN_WARNING "NETjet-S: No PCI card found\n");
+		return 0;	/* end loop & function */
+	}
+	return 1;			/* end loop */
+}
+
+static int njs_cs_init_rest(struct IsdnCard *card, struct IsdnCardState *cs)
+{
+	const int bytecnt = 256;
+
+	printk(KERN_INFO
+	       "NETjet-S: %s card configured at %#lx IRQ %d\n",
+	       cs->subtyp ? "TJ320" : "TJ300", cs->hw.njet.base, cs->irq);
+	if (!request_region(cs->hw.njet.base, bytecnt, "netjet-s isdn")) {
+		printk(KERN_WARNING
+		       "HiSax: NETjet-S config port %#lx-%#lx already in use\n",
+		       cs->hw.njet.base,
+		       cs->hw.njet.base + bytecnt);
+		return (0);
+	}
+	cs->readisac  = &NETjet_ReadIC;
+	cs->writeisac = &NETjet_WriteIC;
+	cs->readisacfifo  = &NETjet_ReadICfifo;
+	cs->writeisacfifo = &NETjet_WriteICfifo;
+	cs->BC_Read_Reg  = &dummyrr;
+	cs->BC_Write_Reg = &dummywr;
+	cs->BC_Send_Data = &netjet_fill_dma;
+	setup_isac(cs);
+	cs->cardmsg = &NETjet_S_card_msg;
+	cs->irq_func = &netjet_s_interrupt;
+	cs->irq_flags |= IRQF_SHARED;
+	ISACVersion(cs, "NETjet-S:");
+
+	return (1);
+}
+
+static struct pci_dev *dev_netjet = NULL;
+
+int setup_netjet_s(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, NETjet_S_revision);
+	printk(KERN_INFO "HiSax: Traverse Tech. NETjet-S driver Rev. %s\n", HiSax_getrev(tmp));
+	if (cs->typ != ISDN_CTYPE_NETJET_S)
+		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 = njs_pci_probe(dev_netjet, cs);
+			if (!ret)
+				return (0);
+		} else {
+			printk(KERN_WARNING "NETjet-S: No PCI card found\n");
+			return (0);
+		}
+
+		ret = njs_cs_init(card, cs);
+		if (!ret)
+			return (0);
+		if (ret > 0)
+			break;
+		/* otherwise, ret < 0, continue looping */
+	}
+
+	return njs_cs_init_rest(card, cs);
+}