eepro.c

linux 内核源代码

		eepro_sw2bank0(ioaddr); /* Switch back to Bank 0 */

		if (request_irq (*irqp, NULL, IRQF_SHARED, "bogus", dev) != EBUSY) {
			unsigned long irq_mask;
			/* Twinkle the interrupt, and check if it's seen */
			irq_mask = probe_irq_on();

			eepro_diag(ioaddr); /* RESET the 82595 */
			mdelay(20);

			if (*irqp == probe_irq_off(irq_mask))  /* It's a good IRQ line */
				break;

			/* clear all interrupts */
			eepro_clear_int(ioaddr);
		}
	} while (*++irqp);

	eepro_sw2bank1(ioaddr); /* Switch back to Bank 1 */

	/* Disable the physical interrupt line. */
	eepro_dis_intline(ioaddr);

	eepro_sw2bank0(ioaddr); /* Switch back to Bank 0 */

	/* Mask all the interrupts. */
	eepro_dis_int(ioaddr);

	/* clear all interrupts */
	eepro_clear_int(ioaddr);

	return dev->irq;
}

static int eepro_open(struct net_device *dev)
{
	unsigned short temp_reg, old8, old9;
	int irqMask;
	int i, ioaddr = dev->base_addr;
	struct eepro_local *lp = netdev_priv(dev);

	if (net_debug > 3)
		printk(KERN_DEBUG "%s: entering eepro_open routine.\n", dev->name);

	irqMask = lp->word[7];

	if (lp->eepro == LAN595FX_10ISA) {
		if (net_debug > 3) printk(KERN_DEBUG "p->eepro = 3;\n");
	}
	else if (irqMask == ee_FX_INT2IRQ) /* INT to IRQ Mask */
		{
			lp->eepro = 2; /* Yes, an Intel EtherExpress Pro/10+ */
			if (net_debug > 3) printk(KERN_DEBUG "p->eepro = 2;\n");
		}

	else if ((dev->dev_addr[0] == SA_ADDR0 &&
			dev->dev_addr[1] == SA_ADDR1 &&
			dev->dev_addr[2] == SA_ADDR2))
		{
			lp->eepro = 1;
			if (net_debug > 3) printk(KERN_DEBUG "p->eepro = 1;\n");
		}  /* Yes, an Intel EtherExpress Pro/10 */

	else lp->eepro = 0; /* No, it is a generic 82585 lan card */

	/* Get the interrupt vector for the 82595 */
	if (dev->irq < 2 && eepro_grab_irq(dev) == 0) {
		printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
		return -EAGAIN;
	}

	if (request_irq(dev->irq , &eepro_interrupt, 0, dev->name, dev)) {
		printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
		return -EAGAIN;
	}

	/* Initialize the 82595. */

	eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
	temp_reg = inb(ioaddr + lp->eeprom_reg);

	lp->stepping = temp_reg >> 5;	/* Get the stepping number of the 595 */

	if (net_debug > 3)
		printk(KERN_DEBUG "The stepping of the 82595 is %d\n", lp->stepping);

	if (temp_reg & 0x10) /* Check the TurnOff Enable bit */
		outb(temp_reg & 0xef, ioaddr + lp->eeprom_reg);
	for (i=0; i < 6; i++)
		outb(dev->dev_addr[i] , ioaddr + I_ADD_REG0 + i);

	temp_reg = inb(ioaddr + REG1);    /* Setup Transmit Chaining */
	outb(temp_reg | XMT_Chain_Int | XMT_Chain_ErrStop /* and discard bad RCV frames */
		| RCV_Discard_BadFrame, ioaddr + REG1);

	temp_reg = inb(ioaddr + REG2); /* Match broadcast */
	outb(temp_reg | 0x14, ioaddr + REG2);

	temp_reg = inb(ioaddr + REG3);
	outb(temp_reg & 0x3f, ioaddr + REG3); /* clear test mode */

	/* Set the receiving mode */
	eepro_sw2bank1(ioaddr); /* be CAREFUL, BANK 1 now */

	/* Set the interrupt vector */
	temp_reg = inb(ioaddr + INT_NO_REG);
	if (lp->eepro == LAN595FX || lp->eepro == LAN595FX_10ISA)
		outb((temp_reg & 0xf8) | irqrmap2[dev->irq], ioaddr + INT_NO_REG);
	else outb((temp_reg & 0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);


	temp_reg = inb(ioaddr + INT_NO_REG);
	if (lp->eepro == LAN595FX || lp->eepro == LAN595FX_10ISA)
		outb((temp_reg & 0xf0) | irqrmap2[dev->irq] | 0x08,ioaddr+INT_NO_REG);
	else outb((temp_reg & 0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);

	if (net_debug > 3)
		printk(KERN_DEBUG "eepro_open: content of INT Reg is %x\n", temp_reg);


	/* Initialize the RCV and XMT upper and lower limits */
	outb(lp->rcv_lower_limit >> 8, ioaddr + RCV_LOWER_LIMIT_REG);
	outb(lp->rcv_upper_limit >> 8, ioaddr + RCV_UPPER_LIMIT_REG);
	outb(lp->xmt_lower_limit >> 8, ioaddr + lp->xmt_lower_limit_reg);
	outb(lp->xmt_upper_limit >> 8, ioaddr + lp->xmt_upper_limit_reg);

	/* Enable the interrupt line. */
	eepro_en_intline(ioaddr);

	/* Switch back to Bank 0 */
	eepro_sw2bank0(ioaddr);

	/* Let RX and TX events to interrupt */
	eepro_en_int(ioaddr);

	/* clear all interrupts */
	eepro_clear_int(ioaddr);

	/* Initialize RCV */
	outw(lp->rcv_lower_limit, ioaddr + RCV_BAR);
	lp->rx_start = lp->rcv_lower_limit;
	outw(lp->rcv_upper_limit | 0xfe, ioaddr + RCV_STOP);

	/* Initialize XMT */
	outw(lp->xmt_lower_limit, ioaddr + lp->xmt_bar);
	lp->tx_start = lp->tx_end = lp->xmt_lower_limit;
	lp->tx_last = 0;

	/* Check for the i82595TX and i82595FX */
	old8 = inb(ioaddr + 8);
	outb(~old8, ioaddr + 8);

	if ((temp_reg = inb(ioaddr + 8)) == old8) {
		if (net_debug > 3)
			printk(KERN_DEBUG "i82595 detected!\n");
		lp->version = LAN595;
	}
	else {
		lp->version = LAN595TX;
		outb(old8, ioaddr + 8);
		old9 = inb(ioaddr + 9);

		if (irqMask==ee_FX_INT2IRQ) {
			if (net_debug > 3) {
				printk(KERN_DEBUG "IrqMask: %#x\n",irqMask);
				printk(KERN_DEBUG "i82595FX detected!\n");
			}
			lp->version = LAN595FX;
			outb(old9, ioaddr + 9);
			if (dev->if_port != TPE) {	/* Hopefully, this will fix the
							problem of using Pentiums and
							pro/10 w/ BNC. */
				eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
				temp_reg = inb(ioaddr + REG13);
				/* disable the full duplex mode since it is not
				applicable with the 10Base2 cable. */
				outb(temp_reg & ~(FDX | A_N_ENABLE), REG13);
				eepro_sw2bank0(ioaddr); /* be CAREFUL, BANK 0 now */
			}
		}
		else if (net_debug > 3) {
			printk(KERN_DEBUG "temp_reg: %#x  ~old9: %#x\n",temp_reg,((~old9)&0xff));
			printk(KERN_DEBUG "i82595TX detected!\n");
		}
	}

	eepro_sel_reset(ioaddr);

	netif_start_queue(dev);

	if (net_debug > 3)
		printk(KERN_DEBUG "%s: exiting eepro_open routine.\n", dev->name);

	/* enabling rx */
	eepro_en_rx(ioaddr);

	return 0;
}

static void eepro_tx_timeout (struct net_device *dev)
{
	struct eepro_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	/* if (net_debug > 1) */
	printk (KERN_ERR "%s: transmit timed out, %s?\n", dev->name,
		"network cable problem");
	/* This is not a duplicate. One message for the console,
	   one for the log file  */
	printk (KERN_DEBUG "%s: transmit timed out, %s?\n", dev->name,
		"network cable problem");
	eepro_complete_selreset(ioaddr);
}


static int eepro_send_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct eepro_local *lp = netdev_priv(dev);
	unsigned long flags;
	int ioaddr = dev->base_addr;
	short length = skb->len;

	if (net_debug > 5)
		printk(KERN_DEBUG  "%s: entering eepro_send_packet routine.\n", dev->name);

	if (length < ETH_ZLEN) {
		if (skb_padto(skb, ETH_ZLEN))
			return 0;
		length = ETH_ZLEN;
	}
	netif_stop_queue (dev);

	eepro_dis_int(ioaddr);
	spin_lock_irqsave(&lp->lock, flags);

	{
		unsigned char *buf = skb->data;

		if (hardware_send_packet(dev, buf, length))
			/* we won't wake queue here because we're out of space */
			dev->stats.tx_dropped++;
		else {
		dev->stats.tx_bytes+=skb->len;
		dev->trans_start = jiffies;
			netif_wake_queue(dev);
		}

	}

	dev_kfree_skb (skb);

	/* You might need to clean up and record Tx statistics here. */
	/* dev->stats.tx_aborted_errors++; */

	if (net_debug > 5)
		printk(KERN_DEBUG "%s: exiting eepro_send_packet routine.\n", dev->name);

	eepro_en_int(ioaddr);
	spin_unlock_irqrestore(&lp->lock, flags);

	return 0;
}


/*	The typical workload of the driver:
	Handle the network interface interrupts. */

static irqreturn_t
eepro_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct eepro_local *lp;
	int ioaddr, status, boguscount = 20;
	int handled = 0;

	lp = netdev_priv(dev);

        spin_lock(&lp->lock);

	if (net_debug > 5)
		printk(KERN_DEBUG "%s: entering eepro_interrupt routine.\n", dev->name);

	ioaddr = dev->base_addr;

	while (((status = inb(ioaddr + STATUS_REG)) & (RX_INT|TX_INT)) && (boguscount--))
	{
		handled = 1;
		if (status & RX_INT) {
			if (net_debug > 4)
				printk(KERN_DEBUG "%s: packet received interrupt.\n", dev->name);

			eepro_dis_int(ioaddr);

			/* Get the received packets */
			eepro_ack_rx(ioaddr);
			eepro_rx(dev);

			eepro_en_int(ioaddr);
		}
		if (status & TX_INT) {
			if (net_debug > 4)
 				printk(KERN_DEBUG "%s: packet transmit interrupt.\n", dev->name);


			eepro_dis_int(ioaddr);

			/* Process the status of transmitted packets */
			eepro_ack_tx(ioaddr);
			eepro_transmit_interrupt(dev);

			eepro_en_int(ioaddr);
		}
	}

	if (net_debug > 5)
		printk(KERN_DEBUG "%s: exiting eepro_interrupt routine.\n", dev->name);

	spin_unlock(&lp->lock);
	return IRQ_RETVAL(handled);
}

static int eepro_close(struct net_device *dev)
{
	struct eepro_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	short temp_reg;

	netif_stop_queue(dev);

	eepro_sw2bank1(ioaddr); /* Switch back to Bank 1 */

	/* Disable the physical interrupt line. */
	temp_reg = inb(ioaddr + REG1);
	outb(temp_reg & 0x7f, ioaddr + REG1);

	eepro_sw2bank0(ioaddr); /* Switch back to Bank 0 */

	/* Flush the Tx and disable Rx. */
	outb(STOP_RCV_CMD, ioaddr);
	lp->tx_start = lp->tx_end = lp->xmt_lower_limit;
	lp->tx_last = 0;

	/* Mask all the interrupts. */
	eepro_dis_int(ioaddr);

	/* clear all interrupts */
	eepro_clear_int(ioaddr);

	/* Reset the 82595 */
	eepro_reset(ioaddr);

	/* release the interrupt */
	free_irq(dev->irq, dev);

	/* Update the statistics here. What statistics? */

	return 0;
}

/* Set or clear the multicast filter for this adaptor.
 */
static void
set_multicast_list(struct net_device *dev)
{
	struct eepro_local *lp = netdev_priv(dev);
	short ioaddr = dev->base_addr;
	unsigned short mode;
	struct dev_mc_list *dmi=dev->mc_list;

	if (dev->flags&(IFF_ALLMULTI|IFF_PROMISC) || dev->mc_count > 63)
	{
		/*
		 *	We must make the kernel realise we had to move
		 *	into promisc mode or we start all out war on
		 *	the cable. If it was a promisc request the
		 *	flag is already set. If not we assert it.
		 */
		dev->flags|=IFF_PROMISC;

		eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
		mode = inb(ioaddr + REG2);
		outb(mode | PRMSC_Mode, ioaddr + REG2);
		mode = inb(ioaddr + REG3);
		outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
		eepro_sw2bank0(ioaddr); /* Return to BANK 0 now */
	}

	else if (dev->mc_count==0 )
	{
		eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
		mode = inb(ioaddr + REG2);
		outb(mode & 0xd6, ioaddr + REG2); /* Turn off Multi-IA and PRMSC_Mode bits */
		mode = inb(ioaddr + REG3);
		outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
		eepro_sw2bank0(ioaddr); /* Return to BANK 0 now */
	}

	else
	{
		unsigned short status, *eaddrs;
		int i, boguscount = 0;

		/* Disable RX and TX interrupts.  Necessary to avoid
		   corruption of the HOST_ADDRESS_REG by interrupt
		   service routines. */
		eepro_dis_int(ioaddr);

		eepro_sw2bank2(ioaddr); /* be CAREFUL, BANK 2 now */
		mode = inb(ioaddr + REG2);
		outb(mode | Multi_IA, ioaddr + REG2);
		mode = inb(ioaddr + REG3);
		outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
		eepro_sw2bank0(ioaddr); /* Return to BANK 0 now */
		outw(lp->tx_end, ioaddr + HOST_ADDRESS_REG);
		outw(MC_SETUP, ioaddr + IO_PORT);
		outw(0, ioaddr + IO_PORT);
		outw(0, ioaddr + IO_PORT);
		outw(6*(dev->mc_count + 1), ioaddr + IO_PORT);

		for (i = 0; i < dev->mc_count; i++)
		{
			eaddrs=(unsigned short *)dmi->dmi_addr;
			dmi=dmi->next;
			outw(*eaddrs++, ioaddr + IO_PORT);
			outw(*eaddrs++, ioaddr + IO_PORT);
			outw(*eaddrs++, ioaddr + IO_PORT);
		}

		eaddrs = (unsigned short *) dev->dev_addr;
		outw(eaddrs[0], ioaddr + IO_PORT);
		outw(eaddrs[1], ioaddr + IO_PORT);
		outw(eaddrs[2], ioaddr + IO_PORT);
		outw(lp->tx_end, ioaddr + lp->xmt_bar);
		outb(MC_SETUP, ioaddr);

		/* Update the transmit queue */
		i = lp->tx_end + XMT_HEADER + 6*(dev->mc_count + 1);

		if (lp->tx_start != lp->tx_end)
		{
			/* update the next address and the chain bit in the
			   last packet */
			outw(lp->tx_last + XMT_CHAIN, ioaddr + HOST_ADDRESS_REG);
			outw(i, ioaddr + IO_PORT);
			outw(lp->tx_last + XMT_COUNT, ioaddr + HOST_ADDRESS_REG);
			status = inw(ioaddr + IO_PORT);
			outw(status | CHAIN_BIT, ioaddr + IO_PORT);
			lp->tx_end = i ;
		}
		else {
			lp->tx_start = lp->tx_end = i ;
		}

		/* Acknowledge that the MC setup is done */
		do { /* We should be doing this in the eepro_interrupt()! */
			SLOW_DOWN;
			SLOW_DOWN;