avm_pci.c

linux 内核源代码

	if (cs->subtyp == AVM_FRITZ_PCI) {
		stat = ReadHDLCPCI(cs, 0, HDLC_STATUS);
	} else {
		stat = ReadHDLCPnP(cs, 0, HDLC_STATUS);
		if (stat & HDLC_INT_RPR)
			stat |= (ReadHDLCPnP(cs, 0, HDLC_STATUS+1))<<8;
	}
	if (stat & HDLC_INT_MASK) {
		if (!(bcs = Sel_BCS(cs, 0))) {
			if (cs->debug)
				debugl1(cs, "hdlc spurious channel 0 IRQ");
		} else
			HDLC_irq(bcs, stat);
	}
	if (cs->subtyp == AVM_FRITZ_PCI) {
		stat = ReadHDLCPCI(cs, 1, HDLC_STATUS);
	} else {
		stat = ReadHDLCPnP(cs, 1, HDLC_STATUS);
		if (stat & HDLC_INT_RPR)
			stat |= (ReadHDLCPnP(cs, 1, HDLC_STATUS+1))<<8;
	}
	if (stat & HDLC_INT_MASK) {
		if (!(bcs = Sel_BCS(cs, 1))) {
			if (cs->debug)
				debugl1(cs, "hdlc spurious channel 1 IRQ");
		} else
			HDLC_irq(bcs, stat);
	}
}

static void
hdlc_l2l1(struct PStack *st, int pr, void *arg)
{
	struct BCState *bcs = st->l1.bcs;
	struct sk_buff *skb = arg;
	u_long flags;

	switch (pr) {
		case (PH_DATA | REQUEST):
			spin_lock_irqsave(&bcs->cs->lock, flags);
			if (bcs->tx_skb) {
				skb_queue_tail(&bcs->squeue, skb);
			} else {
				bcs->tx_skb = skb;
				test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
				bcs->hw.hdlc.count = 0;
				bcs->cs->BC_Send_Data(bcs);
			}
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			break;
		case (PH_PULL | INDICATION):
			spin_lock_irqsave(&bcs->cs->lock, flags);
			if (bcs->tx_skb) {
				printk(KERN_WARNING "hdlc_l2l1: this shouldn't happen\n");
			} else {
				test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
				bcs->tx_skb = skb;
				bcs->hw.hdlc.count = 0;
				bcs->cs->BC_Send_Data(bcs);
			}
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			break;
		case (PH_PULL | REQUEST):
			if (!bcs->tx_skb) {
				test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
				st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
			} else
				test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
			break;
		case (PH_ACTIVATE | REQUEST):
			spin_lock_irqsave(&bcs->cs->lock, flags);
			test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
			modehdlc(bcs, st->l1.mode, st->l1.bc);
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			l1_msg_b(st, pr, arg);
			break;
		case (PH_DEACTIVATE | REQUEST):
			l1_msg_b(st, pr, arg);
			break;
		case (PH_DEACTIVATE | CONFIRM):
			spin_lock_irqsave(&bcs->cs->lock, flags);
			test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
			modehdlc(bcs, 0, st->l1.bc);
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
			break;
	}
}

static void
close_hdlcstate(struct BCState *bcs)
{
	modehdlc(bcs, 0, 0);
	if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
		kfree(bcs->hw.hdlc.rcvbuf);
		bcs->hw.hdlc.rcvbuf = NULL;
		kfree(bcs->blog);
		bcs->blog = NULL;
		skb_queue_purge(&bcs->rqueue);
		skb_queue_purge(&bcs->squeue);
		if (bcs->tx_skb) {
			dev_kfree_skb_any(bcs->tx_skb);
			bcs->tx_skb = NULL;
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
		}
	}
}

static int
open_hdlcstate(struct IsdnCardState *cs, struct BCState *bcs)
{
	if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
		if (!(bcs->hw.hdlc.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
			printk(KERN_WARNING
			       "HiSax: No memory for hdlc.rcvbuf\n");
			return (1);
		}
		if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
			printk(KERN_WARNING
				"HiSax: No memory for bcs->blog\n");
			test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
			kfree(bcs->hw.hdlc.rcvbuf);
			bcs->hw.hdlc.rcvbuf = NULL;
			return (2);
		}
		skb_queue_head_init(&bcs->rqueue);
		skb_queue_head_init(&bcs->squeue);
	}
	bcs->tx_skb = NULL;
	test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
	bcs->event = 0;
	bcs->hw.hdlc.rcvidx = 0;
	bcs->tx_cnt = 0;
	return (0);
}

static int
setstack_hdlc(struct PStack *st, struct BCState *bcs)
{
	bcs->channel = st->l1.bc;
	if (open_hdlcstate(st->l1.hardware, bcs))
		return (-1);
	st->l1.bcs = bcs;
	st->l2.l2l1 = hdlc_l2l1;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	return (0);
}

#if 0
void __init
clear_pending_hdlc_ints(struct IsdnCardState *cs)
{
	u_int val;

	if (cs->subtyp == AVM_FRITZ_PCI) {
		val = ReadHDLCPCI(cs, 0, HDLC_STATUS);
		debugl1(cs, "HDLC 1 STA %x", val);
		val = ReadHDLCPCI(cs, 1, HDLC_STATUS);
		debugl1(cs, "HDLC 2 STA %x", val);
	} else {
		val = ReadHDLCPnP(cs, 0, HDLC_STATUS);
		debugl1(cs, "HDLC 1 STA %x", val);
		val = ReadHDLCPnP(cs, 0, HDLC_STATUS + 1);
		debugl1(cs, "HDLC 1 RML %x", val);
		val = ReadHDLCPnP(cs, 0, HDLC_STATUS + 2);
		debugl1(cs, "HDLC 1 MODE %x", val);
		val = ReadHDLCPnP(cs, 0, HDLC_STATUS + 3);
		debugl1(cs, "HDLC 1 VIN %x", val);
		val = ReadHDLCPnP(cs, 1, HDLC_STATUS);
		debugl1(cs, "HDLC 2 STA %x", val);
		val = ReadHDLCPnP(cs, 1, HDLC_STATUS + 1);
		debugl1(cs, "HDLC 2 RML %x", val);
		val = ReadHDLCPnP(cs, 1, HDLC_STATUS + 2);
		debugl1(cs, "HDLC 2 MODE %x", val);
		val = ReadHDLCPnP(cs, 1, HDLC_STATUS + 3);
		debugl1(cs, "HDLC 2 VIN %x", val);
	}
}
#endif  /*  0  */

static void
inithdlc(struct IsdnCardState *cs)
{
	cs->bcs[0].BC_SetStack = setstack_hdlc;
	cs->bcs[1].BC_SetStack = setstack_hdlc;
	cs->bcs[0].BC_Close = close_hdlcstate;
	cs->bcs[1].BC_Close = close_hdlcstate;
	modehdlc(cs->bcs, -1, 0);
	modehdlc(cs->bcs + 1, -1, 1);
}

static irqreturn_t
avm_pcipnp_interrupt(int intno, void *dev_id)
{
	struct IsdnCardState *cs = dev_id;
	u_long flags;
	u_char val;
	u_char sval;

	spin_lock_irqsave(&cs->lock, flags);
	sval = inb(cs->hw.avm.cfg_reg + 2);
	if ((sval & AVM_STATUS0_IRQ_MASK) == AVM_STATUS0_IRQ_MASK) {
		/* possible a shared  IRQ reqest */
		spin_unlock_irqrestore(&cs->lock, flags);
		return IRQ_NONE;
	}
	if (!(sval & AVM_STATUS0_IRQ_ISAC)) {
		val = ReadISAC(cs, ISAC_ISTA);
		isac_interrupt(cs, val);
	}
	if (!(sval & AVM_STATUS0_IRQ_HDLC)) {
		HDLC_irq_main(cs);
	}
	WriteISAC(cs, ISAC_MASK, 0xFF);
	WriteISAC(cs, ISAC_MASK, 0x0);
	spin_unlock_irqrestore(&cs->lock, flags);
	return IRQ_HANDLED;
}

static void
reset_avmpcipnp(struct IsdnCardState *cs)
{
	printk(KERN_INFO "AVM PCI/PnP: reset\n");
	outb(AVM_STATUS0_RESET | AVM_STATUS0_DIS_TIMER, cs->hw.avm.cfg_reg + 2);
	mdelay(10);
	outb(AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER | AVM_STATUS0_ENA_IRQ, cs->hw.avm.cfg_reg + 2);
	outb(AVM_STATUS1_ENA_IOM | cs->irq, cs->hw.avm.cfg_reg + 3);
	mdelay(10);
	printk(KERN_INFO "AVM PCI/PnP: S1 %x\n", inb(cs->hw.avm.cfg_reg + 3));
}

static int
AVM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
{
	u_long flags;

	switch (mt) {
		case CARD_RESET:
			spin_lock_irqsave(&cs->lock, flags);
			reset_avmpcipnp(cs);
			spin_unlock_irqrestore(&cs->lock, flags);
			return(0);
		case CARD_RELEASE:
			outb(0, cs->hw.avm.cfg_reg + 2);
			release_region(cs->hw.avm.cfg_reg, 32);
			return(0);
		case CARD_INIT:
			spin_lock_irqsave(&cs->lock, flags);
			reset_avmpcipnp(cs);
			clear_pending_isac_ints(cs);
			initisac(cs);
			inithdlc(cs);
			outb(AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER,
				cs->hw.avm.cfg_reg + 2);
			WriteISAC(cs, ISAC_MASK, 0);
			outb(AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER |
				AVM_STATUS0_ENA_IRQ, cs->hw.avm.cfg_reg + 2);
			/* RESET Receiver and Transmitter */
			WriteISAC(cs, ISAC_CMDR, 0x41);
			spin_unlock_irqrestore(&cs->lock, flags);
			return(0);
		case CARD_TEST:
			return(0);
	}
	return(0);
}

static int __devinit avm_setup_rest(struct IsdnCardState *cs)
{
	u_int val, ver;

	cs->hw.avm.isac = cs->hw.avm.cfg_reg + 0x10;
	if (!request_region(cs->hw.avm.cfg_reg, 32,
		(cs->subtyp == AVM_FRITZ_PCI) ? "avm PCI" : "avm PnP")) {
		printk(KERN_WARNING
		       "HiSax: Fritz!PCI/PNP config port %x-%x already in use\n",
		       cs->hw.avm.cfg_reg,
		       cs->hw.avm.cfg_reg + 31);
		return (0);
	}
	switch (cs->subtyp) {
	  case AVM_FRITZ_PCI:
		val = inl(cs->hw.avm.cfg_reg);
		printk(KERN_INFO "AVM PCI: stat %#x\n", val);
		printk(KERN_INFO "AVM PCI: Class %X Rev %d\n",
			val & 0xff, (val>>8) & 0xff);
		cs->BC_Read_Reg = &ReadHDLC_s;
		cs->BC_Write_Reg = &WriteHDLC_s;
		break;
	  case AVM_FRITZ_PNP:
		val = inb(cs->hw.avm.cfg_reg);
		ver = inb(cs->hw.avm.cfg_reg + 1);
		printk(KERN_INFO "AVM PnP: Class %X Rev %d\n", val, ver);
		cs->BC_Read_Reg = &ReadHDLCPnP;
		cs->BC_Write_Reg = &WriteHDLCPnP;
		break;
	  default:
	  	printk(KERN_WARNING "AVM unknown subtype %d\n", cs->subtyp);
	  	return(0);
	}
	printk(KERN_INFO "HiSax: %s config irq:%d base:0x%X\n",
		(cs->subtyp == AVM_FRITZ_PCI) ? "AVM Fritz!PCI" : "AVM Fritz!PnP",
		cs->irq, cs->hw.avm.cfg_reg);

	setup_isac(cs);
	cs->readisac = &ReadISAC;
	cs->writeisac = &WriteISAC;
	cs->readisacfifo = &ReadISACfifo;
	cs->writeisacfifo = &WriteISACfifo;
	cs->BC_Send_Data = &hdlc_fill_fifo;
	cs->cardmsg = &AVM_card_msg;
	cs->irq_func = &avm_pcipnp_interrupt;
	cs->writeisac(cs, ISAC_MASK, 0xFF);
	ISACVersion(cs, (cs->subtyp == AVM_FRITZ_PCI) ? "AVM PCI:" : "AVM PnP:");
	return (1);
}

#ifndef __ISAPNP__

static int __devinit avm_pnp_setup(struct IsdnCardState *cs)
{
	return(1);	/* no-op: success */
}

#else

static struct pnp_card *pnp_avm_c __devinitdata = NULL;

static int __devinit avm_pnp_setup(struct IsdnCardState *cs)
{
	struct pnp_dev *pnp_avm_d = NULL;

	if (!isapnp_present())
		return(1);	/* no-op: success */

	if ((pnp_avm_c = pnp_find_card(
		ISAPNP_VENDOR('A', 'V', 'M'),
		ISAPNP_FUNCTION(0x0900), pnp_avm_c))) {
		if ((pnp_avm_d = pnp_find_dev(pnp_avm_c,
			ISAPNP_VENDOR('A', 'V', 'M'),
			ISAPNP_FUNCTION(0x0900), pnp_avm_d))) {
			int err;

			pnp_disable_dev(pnp_avm_d);
			err = pnp_activate_dev(pnp_avm_d);
			if (err<0) {
				printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)\n",
					__FUNCTION__, err);
				return(0);
			}
			cs->hw.avm.cfg_reg =
				pnp_port_start(pnp_avm_d, 0);
			cs->irq = pnp_irq(pnp_avm_d, 0);
			if (!cs->irq) {
				printk(KERN_ERR "FritzPnP:No IRQ\n");
				return(0);
			}
			if (!cs->hw.avm.cfg_reg) {
				printk(KERN_ERR "FritzPnP:No IO address\n");
				return(0);
			}
			cs->subtyp = AVM_FRITZ_PNP;

			return (2);	/* goto 'ready' label */
		}
	}

	return (1);
}

#endif /* __ISAPNP__ */

#ifndef CONFIG_PCI_LEGACY

static int __devinit avm_pci_setup(struct IsdnCardState *cs)
{
	return(1);	/* no-op: success */
}

#else

static struct pci_dev *dev_avm __devinitdata = NULL;

static int __devinit avm_pci_setup(struct IsdnCardState *cs)
{
	if ((dev_avm = pci_find_device(PCI_VENDOR_ID_AVM,
		PCI_DEVICE_ID_AVM_A1, dev_avm))) {

		if (pci_enable_device(dev_avm))
			return(0);

		cs->irq = dev_avm->irq;
		if (!cs->irq) {
			printk(KERN_ERR "FritzPCI: No IRQ for PCI card found\n");
			return(0);
		}

		cs->hw.avm.cfg_reg = pci_resource_start(dev_avm, 1);
		if (!cs->hw.avm.cfg_reg) {
			printk(KERN_ERR "FritzPCI: No IO-Adr for PCI card found\n");
			return(0);
		}

		cs->subtyp = AVM_FRITZ_PCI;
	} else {
		printk(KERN_WARNING "FritzPCI: No PCI card found\n");
		return(0);
	}

	cs->irq_flags |= IRQF_SHARED;

	return (1);
}

#endif /* CONFIG_PCI_LEGACY */

int __devinit
setup_avm_pcipnp(struct IsdnCard *card)
{
	struct IsdnCardState *cs = card->cs;
	char tmp[64];
	int rc;

	strcpy(tmp, avm_pci_rev);
	printk(KERN_INFO "HiSax: AVM PCI driver Rev. %s\n", HiSax_getrev(tmp));

	if (cs->typ != ISDN_CTYPE_FRITZPCI)
		return (0);

	if (card->para[1]) {
		/* old manual method */
		cs->hw.avm.cfg_reg = card->para[1];
		cs->irq = card->para[0];
		cs->subtyp = AVM_FRITZ_PNP;
		goto ready;
	}

	rc = avm_pnp_setup(cs);
	if (rc < 1)
		return (0);
	if (rc == 2)
		goto ready;

	rc = avm_pci_setup(cs);
	if (rc < 1)
		return (0);

ready:
	return avm_setup_rest(cs);
}