drivers/isdn/hisax/nj_s.c - kernel/bruno - Git at Google

 /* $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);
 }
	/* $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);
	}