82596.c

powerpc内核mpc8241linux系统下net驱动程序

		int i;

		rtc[3] |= 0x80;
		for (i = 0; i < 6; i++)
			eth_addr[i] = rtc[i * 4 + 7];	/* Stored in RTC RAM at offset 1 */
		rtc[3] = msr;
		dev->base_addr = BVME_I596_BASE;
		dev->irq = (unsigned) BVME_IRQ_I596;
	}
#endif
#ifdef CONFIG_APRICOT_INTEL
	int checksum = 0;
	int ioaddr = 0x300;

	/* this is easy the ethernet interface can only be at 0x300 */
	/* first check nothing is already registered here */

	if (check_region(ioaddr, I596_TOTAL_SIZE))
		return ENODEV;

	for (i = 0; i < 8; i++) {
		eth_addr[i] = inb(ioaddr + 8 + i);
		checksum += eth_addr[i];
	}

	/* checksum is a multiple of 0x100, got this wrong first time
	   some machines have 0x100, some 0x200. The DOS driver doesn't
	   even bother with the checksum */

	if (checksum % 0x100)
		return ENODEV;

	/* Some other boards trip the checksum.. but then appear as ether
	   address 0. Trap these - AC */

	if (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)
		return ENODEV;

	request_region(ioaddr, I596_TOTAL_SIZE, "i596");

	dev->base_addr = ioaddr;
	dev->irq = 10;
#endif
	ether_setup(dev);
	printk("%s: 82596 at %#3lx,", dev->name, dev->base_addr);

	for (i = 0; i < 6; i++)
		printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]);

	printk(" IRQ %d.\n", dev->irq);

	if (i596_debug > 0)
		printk(version);

	/* The APRICOT-specific entries in the device structure. */
	dev->open = &i596_open;
	dev->stop = &i596_close;
	dev->hard_start_xmit = &i596_start_xmit;
	dev->get_stats = &i596_get_stats;
	dev->set_multicast_list = &set_multicast_list;

	dev->mem_start = (int) kmalloc(sizeof(struct i596_private) + 0x0f, GFP_KERNEL);
	/* align for scp */
	dev->priv = (void *) ((dev->mem_start + 0xf) & 0xfffffff0);

	lp = (struct i596_private *) dev->priv;
	if (i596_debug)
		printk("%s: lp at 0x%08lx, lp->scb at 0x%08lx\n"
		,dev->name, (unsigned long) lp, (unsigned long) &lp->scb);
	memset((void *) lp, 0, sizeof(struct i596_private));
	lp->scb.command = 0;
	lp->scb.cmd = (struct i596_cmd *) I596_NULL;
	lp->scb.rfd = (struct i596_rfd *) I596_NULL;

	return 0;
}

static void i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct device *dev = dev_id;
	struct i596_private *lp;
	short ioaddr;
	int boguscnt = 2000;
	unsigned short status, ack_cmd = 0;

#ifdef CONFIG_BVME6000_NET
	if (MACH_IS_BVME6000) {
		if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
			i596_error(BVME_IRQ_I596, NULL, NULL);
			return;
		}
	}
#endif
	if (dev == NULL) {
		printk("i596_interrupt(): irq %d for unknown device.\n", irq);
		return;
	}
	if (i596_debug > 3)
		printk("%s: i596_interrupt(): irq %d\n", dev->name, irq);

	if (dev->interrupt)
		printk("%s: Re-entering the interrupt handler.\n", dev->name);

	dev->interrupt = 1;

	ioaddr = dev->base_addr;

	lp = (struct i596_private *) dev->priv;

	while (lp->scb.command)
		if (--boguscnt == 0) {
			printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command);
			break;
		}
	status = lp->scb.status;

	if (i596_debug > 4)
		printk("%s: i596 interrupt, status %4.4x.\n", dev->name, status);

	ack_cmd = status & 0xf000;

	if ((status & 0x8000) || (status & 0x2000)) {
		struct i596_cmd *ptr;

		if ((i596_debug > 4) && (status & 0x8000))
			printk("%s: i596 interrupt completed command.\n", dev->name);
		if ((i596_debug > 4) && (status & 0x2000))
			printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700);

		while ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (lp->cmd_head->status & STAT_C)) {
			ptr = lp->cmd_head;

			if (i596_debug > 2)
				printk("cmd_head->status = %04x, ->command = %04x\n",
				       lp->cmd_head->status, lp->cmd_head->command);
			lp->cmd_head = WSWAPcmd(lp->cmd_head->next);
			lp->cmd_backlog--;

			switch ((ptr->command) & 0x7) {
			case CmdTx:
				{
					struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
					struct sk_buff *skb = tx_cmd->skb;

					if ((ptr->status) & STAT_OK) {
						if (i596_debug > 2)
							print_eth(skb->data);
					} else {
						lp->stats.tx_errors++;
						if ((ptr->status) & 0x0020)
							lp->stats.collisions++;
						if (!((ptr->status) & 0x0040))
							lp->stats.tx_heartbeat_errors++;
						if ((ptr->status) & 0x0400)
							lp->stats.tx_carrier_errors++;
						if ((ptr->status) & 0x0800)
							lp->stats.collisions++;
						if ((ptr->status) & 0x1000)
							lp->stats.tx_aborted_errors++;
					}

					dev_kfree_skb(skb);

					ptr->next = (struct i596_cmd *) I596_NULL;
					kfree(tx_cmd);
					break;
				}
			case CmdMulticastList:
				{
					ptr->next = (struct i596_cmd *) I596_NULL;
					kfree(ptr);
					break;
				}
			case CmdTDR:
				{
					unsigned long status = *((unsigned long *) (ptr + 1));

					if (status & 0x8000) {
						if (i596_debug > 3)
							printk("%s: link ok.\n", dev->name);
					} else {
						if (status & 0x4000)
							printk("%s: Transceiver problem.\n", dev->name);
						if (status & 0x2000)
							printk("%s: Termination problem.\n", dev->name);
						if (status & 0x1000)
							printk("%s: Short circuit.\n", dev->name);

						if (i596_debug > 1)
							printk("%s: Time %ld.\n", dev->name, status & 0x07ff);
					}
					break;
				}
			case CmdConfigure:
				{
					ptr->next = (struct i596_cmd *) I596_NULL;
					/* Zap command so set_multicast_list() knows it is free */
					ptr->command = 0;
					break;
				}
			default:
				ptr->next = (struct i596_cmd *) I596_NULL;
			}
			lp->last_cmd = jiffies;
		}

		ptr = lp->cmd_head;
		while ((ptr != (struct i596_cmd *) I596_NULL) && (ptr != lp->cmd_tail)) {
			ptr->command &= 0x1fff;
			ptr = WSWAPcmd(ptr->next);
		}

		if ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (dev->start))
			ack_cmd |= CUC_START;
		lp->scb.cmd = WSWAPcmd(lp->cmd_head);
	}
	if ((status & 0x1000) || (status & 0x4000)) {
		if ((i596_debug > 4) && (status & 0x4000))
			printk("%s: i596 interrupt received a frame.\n", dev->name);
		/* Only RX_START if stopped - RGH 07-07-96 */
		if (status & 0x1000) {
			if (dev->start)
				ack_cmd |= RX_START;
			if (i596_debug > 1)
				printk("%s: i596 interrupt receive unit inactive %x.\n", dev->name, status & 0x00f0);
		}
		i596_rx(dev);
	}
	/* acknowledge the interrupt */

/*      COMMENTED OUT <<<<<
   if ((lp->scb.cmd != (struct i596_cmd *) I596_NULL) && (dev->start))
   ack_cmd |= CUC_START;
 */
	boguscnt = 1000;
	while (lp->scb.command)
		if (--boguscnt == 0) {
			printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command);
			break;
		}
	lp->scb.command = ack_cmd;

#ifdef CONFIG_MVME16x_NET
	if (MACH_IS_MVME16x) {
		/* Ack the interrupt */

		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;

		pcc2[0x2a] |= 0x08;
	}
#endif
#ifdef CONFIG_BVME6000_NET
	if (MACH_IS_BVME6000) {
		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;

		*ethirq = 1;
		*ethirq = 3;
	}
#endif
#ifdef CONFIG_APRICOT_INTEL
	(void) inb(ioaddr + 0x10);
	outb(4, ioaddr + 0xf);
#endif
	CA(dev);

	if (i596_debug > 4)
		printk("%s: exiting interrupt.\n", dev->name);

	dev->interrupt = 0;
	return;
}

static int i596_close(struct device *dev)
{
	struct i596_private *lp = (struct i596_private *) dev->priv;
	int boguscnt = 2000;
	unsigned long flags;

	dev->start = 0;
	dev->tbusy = 1;

	if (i596_debug > 1)
		printk("%s: Shutting down ethercard, status was %4.4x.\n",
		       dev->name, lp->scb.status);

	save_flags(flags);
	cli();

	while (lp->scb.command)
		if (--boguscnt == 0) {
			printk("%s: close1 timed out with status %4.4x, cmd %4.4x.\n",
			     dev->name, lp->scb.status, lp->scb.command);
			break;
		}
	lp->scb.command = CUC_ABORT | RX_ABORT;
	CA(dev);

	boguscnt = 2000;

	while (lp->scb.command)
		if (--boguscnt == 0) {
			printk("%s: close2 timed out with status %4.4x, cmd %4.4x.\n",
			     dev->name, lp->scb.status, lp->scb.command);
			break;
		}
	restore_flags(flags);

	i596_cleanup_cmd(lp);

#ifdef CONFIG_MVME16x_NET
	if (MACH_IS_MVME16x) {
		volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;

		/* Disable all ints */
		pcc2[0x28] = 1;
		pcc2[0x2a] = 0x40;
		pcc2[0x2b] = 0x40;	/* Set snooping bits now! */
	}
#endif
#ifdef CONFIG_BVME6000_NET
	if (MACH_IS_BVME6000) {
		volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;

		*ethirq = 1;
	}
#endif

	free_irq(dev->irq, dev);
	remove_rx_bufs(dev);
	MOD_DEC_USE_COUNT;

	return 0;
}

static struct net_device_stats *
 i596_get_stats(struct device *dev)
{
	struct i596_private *lp = (struct i596_private *) dev->priv;

	return &lp->stats;
}

/*
 *    Set or clear the multicast filter for this adaptor.
 */

static void set_multicast_list(struct device *dev)
{
	struct i596_private *lp = (struct i596_private *) dev->priv;
	struct i596_cmd *cmd;
	int config = 0;

	if (i596_debug > 1)
		printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n", dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF", dev->flags & IFF_ALLMULTI ? "ON" : "OFF");

	if ((dev->flags & IFF_PROMISC) && !(lp->i596_config[8] & 0x01)) {
		lp->i596_config[8] |= 0x01;
		config = 1;
	}
	if (!(dev->flags & IFF_PROMISC) && (lp->i596_config[8] & 0x01)) {
		lp->i596_config[8] &= ~0x01;
		config = 1;
	}
	if ((dev->flags & IFF_ALLMULTI) && (lp->i596_config[11] & 0x20)) {
		lp->i596_config[11] &= ~0x20;
		config = 1;
	}
	if (!(dev->flags & IFF_ALLMULTI) && !(lp->i596_config[11] & 0x20)) {
		lp->i596_config[11] |= 0x20;
		config = 1;
	}
	if (config) {
		if (lp->set_conf.command)
			printk("%s: config change request already queued\n",
			       dev->name);
		else {
			lp->set_conf.command = CmdConfigure;
			i596_add_cmd(dev, &lp->set_conf);
		}
	}
	if (dev->mc_count > 0) {
		struct dev_mc_list *dmi;
		unsigned char *cp;
		cmd = (struct i596_cmd *) kmalloc(sizeof(struct i596_cmd) + 2 + dev->mc_count * 6, GFP_ATOMIC);
		if (cmd == NULL) {
			printk("%s: set_multicast Memory squeeze.\n", dev->name);
			return;
		}
		cmd->command = CmdMulticastList;
		*((unsigned short *) (cmd + 1)) = dev->mc_count * 6;
		cp = ((unsigned char *) (cmd + 1)) + 2;
		for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) {
			memcpy(cp, dmi->dmi_addr, 6);
			if (i596_debug > 1)
				printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, *(cp + 0), *(cp + 1), *(cp + 2), *(cp + 3), *(cp + 4), *(cp + 5));
			cp += 6;
		}
		if (i596_debug > 2)
			print_eth(((char *) (cmd + 1)) + 2);
		i596_add_cmd(dev, cmd);
	}
}

#ifdef HAVE_DEVLIST
static unsigned int i596_portlist[] __initdata =
{0x300, 0};
struct netdev_entry i596_drv =
{"apricot", i82596_probe, I596_TOTAL_SIZE, apricot_portlist};
#endif

#ifdef MODULE
static char devicename[9] =
{0,};
static struct device dev_apricot =
{
	devicename,		/* device name inserted by /linux/drivers/net/net_init.c */
	0, 0, 0, 0,
	0x300, 10,
	0, 0, 0, NULL, i82596_probe};

static int io = 0x300;
static int irq = 10;
MODULE_PARM(irq, "i");

int init_module(void)
{
	dev_apricot.base_addr = io;
	dev_apricot.irq = irq;
	if (register_netdev(&dev_apricot) != 0)
		return -EIO;
	return 0;
}

void cleanup_module(void)
{
	unregister_netdev(&dev_apricot);
	kfree((void *) dev_apricot.mem_start);
	dev_apricot.priv = NULL;

	/* If we don't do this, we can't re-insmod it later. */
	release_region(dev_apricot.base_addr, I596_TOTAL_SIZE);
}

#endif				/* MODULE */

/*
 * Local variables:
 *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
 * End:
 */