ne2.c

linux 内核源代码

						/* Select page 0 */
			{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
			{0x49,	EN0_DCFG},  /* Set WORD-wide (0x49) access. */
			{0x00,	EN0_RCNTLO},  /* Clear the count regs. */
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_IMR},  /* Mask completion irq. */
			{0xFF,	EN0_ISR},
			{E8390_RXOFF, EN0_RXCR},  /* 0x20  Set to monitor */
			{E8390_TXOFF, EN0_TXCR},  /* 0x02  and loopback mode. */
			{32,	EN0_RCNTLO},
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_RSARLO},  /* DMA starting at 0x0000. */
			{0x00,	EN0_RSARHI},
			{E8390_RREAD+E8390_START, E8390_CMD},
		};

		for (i = 0; i < ARRAY_SIZE(program_seq); i++)
			outb_p(program_seq[i].value, base_addr +
				program_seq[i].offset);

	}
	for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
		SA_prom[i] = inb(base_addr + NE_DATAPORT);
	}

	/* I don't know whether the previous sequence includes the general
           board reset procedure, so better don't omit it and just overwrite
           the garbage read from a DE-320 with correct stuff. */

	if (mca_read_stored_pos(slot, 0) == 0xea) {
		unsigned int v;

		for (i = 0; i < 3; i++) {
 			v = dlink_get_eeprom(i, base_addr);
			SA_prom[(i << 1)    ] = v & 0xff;
			SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
		}
	}

	start_page = NESM_START_PG;
	stop_page = NESM_STOP_PG;

	dev->irq=irq;

	/* Snarf the interrupt now.  There's no point in waiting since we cannot
	   share and the board will usually be enabled. */
	retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
	if (retval) {
		printk (" unable to get IRQ %d (irqval=%d).\n",
				dev->irq, retval);
		goto out;
	}

	dev->base_addr = base_addr;

	for(i = 0; i < ETHER_ADDR_LEN; i++)
		dev->dev_addr[i] = SA_prom[i];

	printk(" %s\n", print_mac(mac, dev->dev_addr));

	printk("%s: %s found at %#x, using IRQ %d.\n",
			dev->name, name, base_addr, dev->irq);

	mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);

	ei_status.name = name;
	ei_status.tx_start_page = start_page;
	ei_status.stop_page = stop_page;
	ei_status.word16 = (2 == 2);

	ei_status.rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
	/* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_status.reset_8390 = &ne_reset_8390;
	ei_status.block_input = &ne_block_input;
	ei_status.block_output = &ne_block_output;
	ei_status.get_8390_hdr = &ne_get_8390_hdr;

	ei_status.priv = slot;

	dev->open = &ne_open;
	dev->stop = &ne_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = ei_poll;
#endif
	NS8390_init(dev, 0);

	retval = register_netdev(dev);
	if (retval)
		goto out1;
	return 0;
out1:
	mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
	free_irq(dev->irq, dev);
out:
	release_region(base_addr, NE_IO_EXTENT);
	return retval;
}

static int ne_open(struct net_device *dev)
{
	ei_open(dev);
	return 0;
}

static int ne_close(struct net_device *dev)
{
	if (ei_debug > 1)
		printk("%s: Shutting down ethercard.\n", dev->name);
	ei_close(dev);
	return 0;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */
static void ne_reset_8390(struct net_device *dev)
{
	unsigned long reset_start_time = jiffies;

	if (ei_debug > 1)
		printk("resetting the 8390 t=%ld...", jiffies);

	/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
	outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);

	ei_status.txing = 0;
	ei_status.dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
			printk("%s: ne_reset_8390() did not complete.\n",
					dev->name);
			break;
		}
	outb_p(ENISR_RESET, NE_BASE + EN0_ISR);	/* Ack intr. */
}

/* Grab the 8390 specific header. Similar to the block_input routine, but
   we don't need to be concerned with ring wrap as the header will be at
   the start of a page, so we optimize accordingly. */

static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
		int ring_page)
{

	int nic_base = dev->base_addr;

	/* This *shouldn't* happen.
	   If it does, it's the last thing you'll see */
	if (ei_status.dmaing) {
		printk("%s: DMAing conflict in ne_get_8390_hdr "
				"[DMAstat:%d][irqlock:%d].\n",
				dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
	outb_p(0, nic_base + EN0_RCNTHI);
	outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
	outb_p(ring_page, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_status.word16)
		insw(NE_BASE + NE_DATAPORT, hdr,
				sizeof(struct e8390_pkt_hdr)>>1);
	else
		insb(NE_BASE + NE_DATAPORT, hdr,
				sizeof(struct e8390_pkt_hdr));

	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
}

/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for
   hints. The NEx000 doesn't share the on-board packet memory -- you have
   to put the packet out through the "remote DMA" dataport using outb. */

static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
		int ring_offset)
{
#ifdef NE_SANITY_CHECK
	int xfer_count = count;
#endif
	int nic_base = dev->base_addr;
	char *buf = skb->data;

	/* This *shouldn't* happen.
	   If it does, it's the last thing you'll see */
	if (ei_status.dmaing) {
		printk("%s: DMAing conflict in ne_block_input "
				"[DMAstat:%d][irqlock:%d].\n",
				dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
	outb_p(count >> 8, nic_base + EN0_RCNTHI);
	outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
	outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
	if (ei_status.word16) {
		insw(NE_BASE + NE_DATAPORT,buf,count>>1);
		if (count & 0x01) {
			buf[count-1] = inb(NE_BASE + NE_DATAPORT);
#ifdef NE_SANITY_CHECK
			xfer_count++;
#endif
		}
	} else {
		insb(NE_BASE + NE_DATAPORT, buf, count);
	}

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here.  If you see
	   this message you either 1) have a slightly incompatible clone
	   or 2) have noise/speed problems with your bus. */
	if (ei_debug > 1) {	/* DMA termination address check... */
		int addr, tries = 20;
		do {
			/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
			   -- it's broken for Rx on some cards! */
			int high = inb_p(nic_base + EN0_RSARHI);
			int low = inb_p(nic_base + EN0_RSARLO);
			addr = (high << 8) + low;
			if (((ring_offset + xfer_count) & 0xff) == low)
				break;
		} while (--tries > 0);
		if (tries <= 0)
			printk("%s: RX transfer address mismatch,"
				"%#4.4x (expected) vs. %#4.4x (actual).\n",
				dev->name, ring_offset + xfer_count, addr);
	}
#endif
	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
}

static void ne_block_output(struct net_device *dev, int count,
		const unsigned char *buf, const int start_page)
{
	int nic_base = NE_BASE;
	unsigned long dma_start;
#ifdef NE_SANITY_CHECK
	int retries = 0;
#endif

	/* Round the count up for word writes. Do we need to do this?
	   What effect will an odd byte count have on the 8390?
	   I should check someday. */
	if (ei_status.word16 && (count & 0x01))
		count++;

	/* This *shouldn't* happen.
	   If it does, it's the last thing you'll see */
	if (ei_status.dmaing) {
		printk("%s: DMAing conflict in ne_block_output."
				"[DMAstat:%d][irqlock:%d]\n",
				dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	/* We should already be in page 0, but to be safe... */
	outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

#ifdef NE_SANITY_CHECK
retry:
#endif

#ifdef NE8390_RW_BUGFIX
	/* Handle the read-before-write bug the same way as the
	   Crynwr packet driver -- the NatSemi method doesn't work.
	   Actually this doesn't always work either, but if you have
	   problems with your NEx000 this is better than nothing! */
	outb_p(0x42, nic_base + EN0_RCNTLO);
	outb_p(0x00, nic_base + EN0_RCNTHI);
	outb_p(0x42, nic_base + EN0_RSARLO);
	outb_p(0x00, nic_base + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
	/* Make certain that the dummy read has occurred. */
	SLOW_DOWN_IO;
	SLOW_DOWN_IO;
	SLOW_DOWN_IO;
#endif

	outb_p(ENISR_RDC, nic_base + EN0_ISR);

	/* Now the normal output. */
	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
	outb_p(count >> 8,   nic_base + EN0_RCNTHI);
	outb_p(0x00, nic_base + EN0_RSARLO);
	outb_p(start_page, nic_base + EN0_RSARHI);

	outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
	if (ei_status.word16) {
		outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
	} else {
		outsb(NE_BASE + NE_DATAPORT, buf, count);
	}

	dma_start = jiffies;

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here. */

	if (ei_debug > 1) {		/* DMA termination address check... */
		int addr, tries = 20;
		do {
			int high = inb_p(nic_base + EN0_RSARHI);
			int low = inb_p(nic_base + EN0_RSARLO);
			addr = (high << 8) + low;
			if ((start_page << 8) + count == addr)
				break;
		} while (--tries > 0);
		if (tries <= 0) {
			printk("%s: Tx packet transfer address mismatch,"
					"%#4.4x (expected) vs. %#4.4x (actual).\n",
					dev->name, (start_page << 8) + count, addr);
			if (retries++ == 0)
				goto retry;
		}
	}
#endif

	while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
		if (time_after(jiffies, dma_start + 2*HZ/100)) {		/* 20ms */
			printk("%s: timeout waiting for Tx RDC.\n", dev->name);
			ne_reset_8390(dev);
			NS8390_init(dev,1);
			break;
		}

	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
	return;
}


#ifdef MODULE
#define MAX_NE_CARDS	4	/* Max number of NE cards per module */
static struct net_device *dev_ne[MAX_NE_CARDS];
static int io[MAX_NE_CARDS];
static int irq[MAX_NE_CARDS];
static int bad[MAX_NE_CARDS];	/* 0xbad = bad sig or no reset ack */
MODULE_LICENSE("GPL");

module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(bad, int, NULL, 0);
MODULE_PARM_DESC(io, "(ignored)");
MODULE_PARM_DESC(irq, "(ignored)");
MODULE_PARM_DESC(bad, "(ignored)");

/* Module code fixed by David Weinehall */

int __init init_module(void)
{
	struct net_device *dev;
	int this_dev, found = 0;

	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		dev = alloc_ei_netdev();
		if (!dev)
			break;
		dev->irq = irq[this_dev];
		dev->mem_end = bad[this_dev];
		dev->base_addr = io[this_dev];
		if (do_ne2_probe(dev) == 0) {
			dev_ne[found++] = dev;
			continue;
		}
		free_netdev(dev);
		break;
	}
	if (found)
		return 0;
	printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
	return -ENXIO;
}

static void cleanup_card(struct net_device *dev)
{
	mca_mark_as_unused(ei_status.priv);
	mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
	free_irq(dev->irq, dev);
	release_region(dev->base_addr, NE_IO_EXTENT);
}

void __exit cleanup_module(void)
{
	int this_dev;

	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		struct net_device *dev = dev_ne[this_dev];
		if (dev) {
			unregister_netdev(dev);
			cleanup_card(dev);
			free_netdev(dev);
		}
	}
}
#endif /* MODULE */