de2104x.c

是关于linux2.5.1的完全源码

		if (regs.len > DE_REGS_SIZE) {
			regs.len = DE_REGS_SIZE;
		}
		regs.version = (DE_REGS_VER << 2) | de->de21040;
		if (copy_to_user(useraddr, &regs, sizeof(regs)))
			return -EFAULT;

		useraddr += offsetof(struct ethtool_regs, data);

		spin_lock_irq(&de->lock);
		r = de_get_regs(de, regbuf);
		spin_unlock_irq(&de->lock);

		if (r)
			return r;
		if (copy_to_user(useraddr, regbuf, regs.len))
			return -EFAULT;
		return 0;
	}

	/* get SROM dump */
	case ETHTOOL_GEEPROM: {
		struct ethtool_eeprom eeprom;

		if (!de->ee_data)
			break;
		if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
			return -EFAULT;
		if ((eeprom.offset != 0) || (eeprom.magic != 0) ||
		    (eeprom.len != DE_EEPROM_SIZE))
			return -EINVAL;

		useraddr += offsetof(struct ethtool_regs, data);
		if (copy_to_user(useraddr, de->ee_data, DE_EEPROM_SIZE))
			return -EFAULT;
	}

	default:
		break;
	}

	return -EOPNOTSUPP;
}


static int de_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct de_private *de = dev->priv;
	int rc = 0;

	if (!netif_running(dev))
		return -EINVAL;
		
	switch (cmd) {
	case SIOCETHTOOL:
		return de_ethtool_ioctl(de, (void *) rq->ifr_data);

	default:
		rc = -EOPNOTSUPP;
		break;
	}

	return rc;
}

static void __init de21040_get_mac_address (struct de_private *de)
{
	unsigned i;

	dw32 (ROMCmd, 0);	/* Reset the pointer with a dummy write. */

	for (i = 0; i < 6; i++) {
		int value, boguscnt = 100000;
		do
			value = dr32(ROMCmd);
		while (value < 0 && --boguscnt > 0);
		de->dev->dev_addr[i] = value;
		if (boguscnt <= 0)
			printk(KERN_WARNING PFX "timeout reading 21040 MAC address byte %u\n", i);
	}
}

static void __init de21040_get_media_info(struct de_private *de)
{
	unsigned int i;

	de->media_type = DE_MEDIA_TP;
	de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full |
			       SUPPORTED_10baseT_Half | SUPPORTED_AUI;
	de->media_advertise = de->media_supported;

	for (i = 0; i < DE_MAX_MEDIA; i++) {
		switch (i) {
		case DE_MEDIA_AUI:
		case DE_MEDIA_TP:
		case DE_MEDIA_TP_FD:
			de->media[i].type = i;
			de->media[i].csr13 = t21040_csr13[i];
			de->media[i].csr14 = t21040_csr14[i];
			de->media[i].csr15 = t21040_csr15[i];
			break;
		default:
			de->media[i].type = DE_MEDIA_INVALID;
			break;
		}
	}
}

/* Note: this routine returns extra data bits for size detection. */
static unsigned __init tulip_read_eeprom(void *regs, int location, int addr_len)
{
	int i;
	unsigned retval = 0;
	void *ee_addr = regs + ROMCmd;
	int read_cmd = location | (EE_READ_CMD << addr_len);

	writel(EE_ENB & ~EE_CS, ee_addr);
	writel(EE_ENB, ee_addr);

	/* Shift the read command bits out. */
	for (i = 4 + addr_len; i >= 0; i--) {
		short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
		writel(EE_ENB | dataval, ee_addr);
		readl(ee_addr);
		writel(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
		readl(ee_addr);
		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
	}
	writel(EE_ENB, ee_addr);
	readl(ee_addr);

	for (i = 16; i > 0; i--) {
		writel(EE_ENB | EE_SHIFT_CLK, ee_addr);
		readl(ee_addr);
		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
		writel(EE_ENB, ee_addr);
		readl(ee_addr);
	}

	/* Terminate the EEPROM access. */
	writel(EE_ENB & ~EE_CS, ee_addr);
	return retval;
}

static void __init de21041_get_srom_info (struct de_private *de)
{
	unsigned i, sa_offset = 0, ofs;
	u8 ee_data[DE_EEPROM_SIZE + 6] = {};
	unsigned ee_addr_size = tulip_read_eeprom(de->regs, 0xff, 8) & 0x40000 ? 8 : 6;
	struct de_srom_info_leaf *il;
	void *bufp;

	/* download entire eeprom */
	for (i = 0; i < DE_EEPROM_WORDS; i++)
		((u16 *)ee_data)[i] =
			le16_to_cpu(tulip_read_eeprom(de->regs, i, ee_addr_size));

	/* DEC now has a specification but early board makers
	   just put the address in the first EEPROM locations. */
	/* This does  memcmp(eedata, eedata+16, 8) */
	for (i = 0; i < 8; i ++)
		if (ee_data[i] != ee_data[16+i])
			sa_offset = 20;

	/* store MAC address */
	for (i = 0; i < 6; i ++)
		de->dev->dev_addr[i] = ee_data[i + sa_offset];

	/* get offset of controller 0 info leaf.  ignore 2nd byte. */
	ofs = ee_data[SROMC0InfoLeaf];
	if (ofs >= (sizeof(ee_data) - sizeof(struct de_srom_info_leaf) - sizeof(struct de_srom_media_block)))
		goto bad_srom;

	/* get pointer to info leaf */
	il = (struct de_srom_info_leaf *) &ee_data[ofs];

	/* paranoia checks */
	if (il->n_blocks == 0)
		goto bad_srom;
	if ((sizeof(ee_data) - ofs) <
	    (sizeof(struct de_srom_info_leaf) + (sizeof(struct de_srom_media_block) * il->n_blocks)))
		goto bad_srom;

	/* get default media type */
	switch (DE_UNALIGNED_16(&il->default_media)) {
	case 0x0001:  de->media_type = DE_MEDIA_BNC; break;
	case 0x0002:  de->media_type = DE_MEDIA_AUI; break;
	case 0x0204:  de->media_type = DE_MEDIA_TP_FD; break;
	default: de->media_type = DE_MEDIA_TP_AUTO; break;
	}
	
	if (netif_msg_probe(de))
		printk(KERN_INFO "de%d: SROM leaf offset %u, default media %s\n",
		       de->board_idx, ofs,
		       media_name[de->media_type]);

	/* init SIA register values to defaults */
	for (i = 0; i < DE_MAX_MEDIA; i++) {
		de->media[i].type = DE_MEDIA_INVALID;
		de->media[i].csr13 = 0xffff;
		de->media[i].csr14 = 0xffff;
		de->media[i].csr15 = 0xffff;
	}

	/* parse media blocks to see what medias are supported,
	 * and if any custom CSR values are provided
	 */
	bufp = ((void *)il) + sizeof(*il);
	for (i = 0; i < il->n_blocks; i++) {
		struct de_srom_media_block *ib = bufp;
		unsigned idx;

		/* index based on media type in media block */
		switch(ib->opts & MediaBlockMask) {
		case 0: /* 10baseT */
			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half
					  | SUPPORTED_Autoneg;
			idx = DE_MEDIA_TP;
			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
			break;
		case 1: /* BNC */
			de->media_supported |= SUPPORTED_BNC;
			idx = DE_MEDIA_BNC;
			break;
		case 2: /* AUI */
			de->media_supported |= SUPPORTED_AUI;
			idx = DE_MEDIA_AUI;
			break;
		case 4: /* 10baseT-FD */
			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full
					  | SUPPORTED_Autoneg;
			idx = DE_MEDIA_TP_FD;
			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
			break;
		default:
			goto bad_srom;
		}

		de->media[idx].type = idx;

		if (netif_msg_probe(de))
			printk(KERN_INFO "de%d:   media block #%u: %s",
			       de->board_idx, i,
			       media_name[de->media[idx].type]);

		bufp += sizeof (ib->opts);

		if (ib->opts & MediaCustomCSRs) {
			de->media[idx].csr13 = DE_UNALIGNED_16(&ib->csr13);
			de->media[idx].csr14 = DE_UNALIGNED_16(&ib->csr14);
			de->media[idx].csr15 = DE_UNALIGNED_16(&ib->csr15);
			bufp += sizeof(ib->csr13) + sizeof(ib->csr14) +
				sizeof(ib->csr15);

			if (netif_msg_probe(de))
				printk(" (%x,%x,%x)\n",
				       de->media[idx].csr13,
				       de->media[idx].csr14,
				       de->media[idx].csr15);
				       
		} else if (netif_msg_probe(de))
			printk("\n");

		if (bufp > ((void *)&ee_data[DE_EEPROM_SIZE - 3]))
			break;
	}

	de->media_advertise = de->media_supported;

fill_defaults:
	/* fill in defaults, for cases where custom CSRs not used */
	for (i = 0; i < DE_MAX_MEDIA; i++) {
		if (de->media[i].csr13 == 0xffff)
			de->media[i].csr13 = t21041_csr13[i];
		if (de->media[i].csr14 == 0xffff)
			de->media[i].csr14 = t21041_csr14[i];
		if (de->media[i].csr15 == 0xffff)
			de->media[i].csr15 = t21041_csr15[i];
	}

	de->ee_data = kmalloc(DE_EEPROM_SIZE, GFP_KERNEL);
	if (de->ee_data)
		memcpy(de->ee_data, &ee_data[0], DE_EEPROM_SIZE);

	return;

bad_srom:
	/* for error cases, it's ok to assume we support all these */
	for (i = 0; i < DE_MAX_MEDIA; i++)
		de->media[i].type = i;
	de->media_supported =
		SUPPORTED_10baseT_Half |
		SUPPORTED_10baseT_Full |
		SUPPORTED_Autoneg |
		SUPPORTED_TP |
		SUPPORTED_AUI |
		SUPPORTED_BNC;
	goto fill_defaults;
}

static int __init de_init_one (struct pci_dev *pdev,
				  const struct pci_device_id *ent)
{
	struct net_device *dev;
	struct de_private *de;
	int rc;
	void *regs;
	long pciaddr;
	static int board_idx = -1;

	board_idx++;

#ifndef MODULE
	if (board_idx == 0)
		printk("%s", version);
#endif

	/* allocate a new ethernet device structure, and fill in defaults */
	dev = alloc_etherdev(sizeof(struct de_private));
	if (!dev)
		return -ENOMEM;

	SET_MODULE_OWNER(dev);
	dev->open = de_open;
	dev->stop = de_close;
	dev->set_multicast_list = de_set_rx_mode;
	dev->hard_start_xmit = de_start_xmit;
	dev->get_stats = de_get_stats;
	dev->do_ioctl = de_ioctl;
	dev->tx_timeout = de_tx_timeout;
	dev->watchdog_timeo = TX_TIMEOUT;

	dev->irq = pdev->irq;

	de = dev->priv;
	de->de21040 = ent->driver_data == 0 ? 1 : 0;
	de->pdev = pdev;
	de->dev = dev;
	de->msg_enable = (debug < 0 ? DE_DEF_MSG_ENABLE : debug);
	de->board_idx = board_idx;
	spin_lock_init (&de->lock);
	init_timer(&de->media_timer);
	if (de->de21040)
		de->media_timer.function = de21040_media_timer;
	else
		de->media_timer.function = de21041_media_timer;
	de->media_timer.data = (unsigned long) de;

	netif_carrier_off(dev);
	netif_stop_queue(dev);

	/* wake up device, assign resources */
	rc = pci_enable_device(pdev);
	if (rc)
		goto err_out_free;

	/* reserve PCI resources to ensure driver atomicity */
	rc = pci_request_regions(pdev, DRV_NAME);
	if (rc)
		goto err_out_disable;

	/* check for invalid IRQ value */
	if (pdev->irq < 2) {
		rc = -EIO;
		printk(KERN_ERR PFX "invalid irq (%d) for pci dev %s\n",
		       pdev->irq, pdev->slot_name);
		goto err_out_res;
	}

	/* obtain and check validity of PCI I/O address */
	pciaddr = pci_resource_start(pdev, 1);
	if (!pciaddr) {
		rc = -EIO;
		printk(KERN_ERR PFX "no MMIO resource for pci dev %s\n",
		       pdev->slot_name);
		goto err_out_res;
	}
	if (pci_resource_len(pdev, 1) < DE_REGS_SIZE) {
		rc = -EIO;
		printk(KERN_ERR PFX "MMIO resource (%lx) too small on pci dev %s\n",
		       pci_resource_len(pdev, 1), pdev->slot_name);
		goto err_out_res;
	}

	/* remap CSR registers */
	regs = ioremap_nocache(pciaddr, DE_REGS_SIZE);
	if (!regs) {
		rc = -EIO;
		printk(KERN_ERR PFX "Cannot map PCI MMIO (%lx@%lx) on pci dev %s\n",
		       pci_resource_len(pdev, 1), pciaddr, pdev->slot_name);
		goto err_out_res;
	}
	dev->base_addr = (unsigned long) regs;
	de->regs = regs;

	de_adapter_wake(de);

	/* make sure hardware is not running */
	rc = de_reset_mac(de);
	if (rc) {
		printk(KERN_ERR PFX "Cannot reset MAC, pci dev %s\n",
		       pdev->slot_name);
		goto err_out_iomap;
	}

	/* get MAC address, initialize default media type and
	 * get list of supported media
	 */
	if (de->de21040) {
		de21040_get_mac_address(de);
		de21040_get_media_info(de);
	} else {
		de21041_get_srom_info(de);
	}

	/* register new network interface with kernel */
	rc = register_netdev(dev);
	if (rc)
		goto err_out_iomap;

	/* print info about board and interface just registered */
	printk (KERN_INFO "%s: %s at 0x%lx, "
		"%02x:%02x:%02x:%02x:%02x:%02x, "
		"IRQ %d\n",
		dev->name,
		de->de21040 ? "21040" : "21041",
		dev->base_addr,
		dev->dev_addr[0], dev->dev_addr[1],
		dev->dev_addr[2], dev->dev_addr[3],
		dev->dev_addr[4], dev->dev_addr[5],
		dev->irq);

	pci_set_drvdata(pdev, dev);

	/* enable busmastering */
	pci_set_master(pdev);

	/* put adapter to sleep */
	de_adapter_sleep(de);

	return 0;

err_out_iomap:
	if (de->ee_data)
		kfree(de->ee_data);
	iounmap(regs);
err_out_res:
	pci_release_regions(pdev);
err_out_disable:
	pci_disable_device(pdev);
err_out_free:
	kfree(dev);
	return rc;
}

static void __exit de_remove_one (struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct de_private *de = dev->priv;

	if (!dev)
		BUG();
	unregister_netdev(dev);
	if (de->ee_data)
		kfree(de->ee_data);
	iounmap(de->regs);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	kfree(dev);
}

#ifdef CONFIG_PM

static int de_suspend (struct pci_dev *pdev, u32 state)
{
	struct net_device *dev = pci_get_drvdata (pdev);
	struct de_private *de = dev->priv;

	rtnl_lock();
	if (netif_running (dev)) {
		del_timer_sync(&de->media_timer);

		disable_irq(dev->irq);
		spin_lock_irq(&de->lock);

		de_stop_hw(de);
		netif_stop_queue(dev);
		netif_device_detach(dev);
		netif_carrier_off(dev);

		spin_unlock_irq(&de->lock);
		enable_irq(dev->irq);
		
		/* Update the error counts. */
		__de_get_stats(de);

		synchronize_irq();
		de_clean_rings(de);

		de_adapter_sleep(de);
		pci_disable_device(pdev);
	} else {
		netif_device_detach(dev);
	}
	rtnl_unlock();
	return 0;
}

static int de_resume (struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata (pdev);
	struct de_private *de = dev->priv;

	rtnl_lock();
	if (netif_device_present(dev))
		goto out;
	if (netif_running(dev)) {
		pci_enable_device(pdev);
		de_init_hw(de);
		netif_device_attach(dev);
	} else {
		netif_device_attach(dev);
	}
out:
	rtnl_unlock();
	return 0;
}

#endif /* CONFIG_PM */

static struct pci_driver de_driver = {
	name:		DRV_NAME,
	id_table:	de_pci_tbl,
	probe:		de_init_one,
	remove:		de_remove_one,
#ifdef CONFIG_PM
	suspend:	de_suspend,
	resume:		de_resume,
#endif
};

static int __init de_init (void)
{
#ifdef MODULE
	printk("%s", version);
#endif
	return pci_module_init (&de_driver);
}

static void __exit de_exit (void)
{
	pci_unregister_driver (&de_driver);
}

module_init(de_init);
module_exit(de_exit);