pegasus.c

h内核

static void unlink_all_urbs(pegasus_t * pegasus)
{
	usb_kill_urb(pegasus->intr_urb);
	usb_kill_urb(pegasus->tx_urb);
	usb_kill_urb(pegasus->rx_urb);
	usb_kill_urb(pegasus->ctrl_urb);
}

static int alloc_urbs(pegasus_t * pegasus)
{
	pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!pegasus->ctrl_urb) {
		return 0;
	}
	pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!pegasus->rx_urb) {
		usb_free_urb(pegasus->ctrl_urb);
		return 0;
	}
	pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!pegasus->tx_urb) {
		usb_free_urb(pegasus->rx_urb);
		usb_free_urb(pegasus->ctrl_urb);
		return 0;
	}
	pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!pegasus->intr_urb) {
		usb_free_urb(pegasus->tx_urb);
		usb_free_urb(pegasus->rx_urb);
		usb_free_urb(pegasus->ctrl_urb);
		return 0;
	}

	return 1;
}

static int pegasus_open(struct net_device *net)
{
	pegasus_t *pegasus = netdev_priv(net);
	int res;

	if (pegasus->rx_skb == NULL)
		pegasus->rx_skb = pull_skb(pegasus);
	/*
	 ** Note: no point to free the pool.  it is empty :-)
	 */
	if (!pegasus->rx_skb)
		return -ENOMEM;

	set_registers(pegasus, EthID, 6, net->dev_addr);
	
	usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
			  usb_rcvbulkpipe(pegasus->usb, 1),
			  pegasus->rx_skb->data, PEGASUS_MTU + 8,
			  read_bulk_callback, pegasus);
	if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL)))
		warn("%s: failed rx_urb %d", __FUNCTION__, res);
	usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
			 usb_rcvintpipe(pegasus->usb, 3),
			 pegasus->intr_buff, sizeof (pegasus->intr_buff),
			 intr_callback, pegasus, pegasus->intr_interval);
	if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL)))
		warn("%s: failed intr_urb %d", __FUNCTION__, res);
	netif_start_queue(net);
	pegasus->flags |= PEGASUS_RUNNING;
	if ((res = enable_net_traffic(net, pegasus->usb))) {
		err("can't enable_net_traffic() - %d", res);
		res = -EIO;
		usb_kill_urb(pegasus->rx_urb);
		usb_kill_urb(pegasus->intr_urb);
		free_skb_pool(pegasus);
		goto exit;
	}
	set_carrier(net);
	res = 0;
exit:
	return res;
}

static int pegasus_close(struct net_device *net)
{
	pegasus_t *pegasus = netdev_priv(net);

	pegasus->flags &= ~PEGASUS_RUNNING;
	netif_stop_queue(net);
	if (!(pegasus->flags & PEGASUS_UNPLUG))
		disable_net_traffic(pegasus);
	tasklet_kill(&pegasus->rx_tl);
	unlink_all_urbs(pegasus);

	return 0;
}

void pegasus_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	pegasus_t *pegasus = netdev_priv(dev);
	strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
	strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
	usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
}

/* also handles three patterns of some kind in hardware */
#define	WOL_SUPPORTED	(WAKE_MAGIC|WAKE_PHY)

static void
pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	pegasus_t	*pegasus = netdev_priv(dev);

	wol->supported = WAKE_MAGIC | WAKE_PHY;
	wol->wolopts = pegasus->wolopts;
}

static int
pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	pegasus_t	*pegasus = netdev_priv(dev);
	u8		reg78 = 0x04;
	
	if (wol->wolopts & ~WOL_SUPPORTED)
		return -EINVAL;

	if (wol->wolopts & WAKE_MAGIC)
		reg78 |= 0x80;
	if (wol->wolopts & WAKE_PHY)
		reg78 |= 0x40;
	if (wol->wolopts)
		pegasus->eth_regs[0] |= 0x10;
	else
		pegasus->eth_regs[0] &= ~0x10;
	pegasus->wolopts = wol->wolopts;
	return set_register(pegasus, WakeupControl, reg78);
}

static inline void
pegasus_reset_wol(struct net_device *dev)
{
	struct ethtool_wolinfo wol;
	
	memset(&wol, 0, sizeof wol);
	(void) pegasus_set_wol(dev, &wol);
}

static int
pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	pegasus_t *pegasus = netdev_priv(dev);
	mii_ethtool_gset(&pegasus->mii, ecmd);
	return 0;
}
static int
pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
	pegasus_t *pegasus = netdev_priv(dev);
	return mii_ethtool_sset(&pegasus->mii, ecmd);
}

static int pegasus_nway_reset(struct net_device *dev)
{
	pegasus_t *pegasus = netdev_priv(dev);
	return mii_nway_restart(&pegasus->mii);
}

static u32 pegasus_get_link(struct net_device *dev)
{
	pegasus_t *pegasus = netdev_priv(dev);
	return mii_link_ok(&pegasus->mii);
}

static u32 pegasus_get_msglevel(struct net_device *dev)
{
	pegasus_t *pegasus = netdev_priv(dev);
	return pegasus->msg_level;
}

static void pegasus_set_msglevel(struct net_device *dev, u32 v)
{
	pegasus_t *pegasus = netdev_priv(dev);
	pegasus->msg_level = v;
}

static struct ethtool_ops ops = {
	.get_drvinfo = pegasus_get_drvinfo,
	.get_settings = pegasus_get_settings,
	.set_settings = pegasus_set_settings,
	.nway_reset = pegasus_nway_reset,
	.get_link = pegasus_get_link,
	.get_msglevel = pegasus_get_msglevel,
	.set_msglevel = pegasus_set_msglevel,
	.get_wol = pegasus_get_wol,
	.set_wol = pegasus_set_wol,
};

static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
	__u16 *data = (__u16 *) & rq->ifr_ifru;
	pegasus_t *pegasus = netdev_priv(net);
	int res;

	switch (cmd) {
	case SIOCDEVPRIVATE:
		data[0] = pegasus->phy;
	case SIOCDEVPRIVATE + 1:
		read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
		res = 0;
		break;
	case SIOCDEVPRIVATE + 2:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
		res = 0;
		break;
	default:
		res = -EOPNOTSUPP;
	}
	return res;
}

static void pegasus_set_multicast(struct net_device *net)
{
	pegasus_t *pegasus = netdev_priv(net);

	if (net->flags & IFF_PROMISC) {
		pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
		pr_info("%s: Promiscuous mode enabled.\n", net->name);
	} else if ((net->mc_count > multicast_filter_limit) ||
		   (net->flags & IFF_ALLMULTI)) {
		pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
		pr_info("%s: set allmulti\n", net->name);
	} else {
		pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
		pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
	}

	pegasus->flags |= ETH_REGS_CHANGE;
	ctrl_callback(pegasus->ctrl_urb, NULL);
}

static __u8 mii_phy_probe(pegasus_t * pegasus)
{
	int i;
	__u16 tmp;

	for (i = 0; i < 32; i++) {
		read_mii_word(pegasus, i, MII_BMSR, &tmp);
		if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
			continue;
		else
			return i;
	}

	return 0xff;
}

static inline void setup_pegasus_II(pegasus_t * pegasus)
{
	__u8 data = 0xa5;
	
	set_register(pegasus, Reg1d, 0);
	set_register(pegasus, Reg7b, 1);
	mdelay(100);
	if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
		set_register(pegasus, Reg7b, 0);
	else
		set_register(pegasus, Reg7b, 2);

	set_register(pegasus, 0x83, data);
	get_registers(pegasus, 0x83, 1, &data);

	if (data == 0xa5) {
		pegasus->chip = 0x8513;
	} else {
		pegasus->chip = 0;
	}

	set_register(pegasus, 0x80, 0xc0);
	set_register(pegasus, 0x83, 0xff);
	set_register(pegasus, 0x84, 0x01);
	
	if (pegasus->features & HAS_HOME_PNA && mii_mode)
		set_register(pegasus, Reg81, 6);
	else
		set_register(pegasus, Reg81, 2);
}

static int pegasus_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct net_device *net;
	pegasus_t *pegasus;
	int dev_index = id - pegasus_ids;
	int res = -ENOMEM;

	usb_get_dev(dev);
	net = alloc_etherdev(sizeof(struct pegasus));
	if (!net) {
		err("out of memory allocating device structure");
		goto out;
	}

	pegasus = netdev_priv(net);
	memset(pegasus, 0, sizeof (struct pegasus));
	pegasus->dev_index = dev_index;
	init_waitqueue_head(&pegasus->ctrl_wait);

	if (!alloc_urbs(pegasus))
		goto out1;

	tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);

	pegasus->usb = dev;
	pegasus->net = net;
	SET_MODULE_OWNER(net);
	net->open = pegasus_open;
	net->stop = pegasus_close;
	net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
	net->tx_timeout = pegasus_tx_timeout;
	net->do_ioctl = pegasus_ioctl;
	net->hard_start_xmit = pegasus_start_xmit;
	net->set_multicast_list = pegasus_set_multicast;
	net->get_stats = pegasus_netdev_stats;
	SET_ETHTOOL_OPS(net, &ops);
	pegasus->mii.dev = net;
	pegasus->mii.mdio_read = mdio_read;
	pegasus->mii.mdio_write = mdio_write;
	pegasus->mii.phy_id_mask = 0x1f;
	pegasus->mii.reg_num_mask = 0x1f;
	spin_lock_init(&pegasus->rx_pool_lock);

	pegasus->features = usb_dev_id[dev_index].private;
	get_interrupt_interval(pegasus);
	if (reset_mac(pegasus)) {
		dev_err(&intf->dev, "can't reset MAC\n");
		res = -EIO;
		goto out2;
	}
	set_ethernet_addr(pegasus);
	fill_skb_pool(pegasus);
	if (pegasus->features & PEGASUS_II) {
		dev_info(&intf->dev, "setup Pegasus II specific registers\n");
		setup_pegasus_II(pegasus);
	}
	pegasus->phy = mii_phy_probe(pegasus);
	if (pegasus->phy == 0xff) {
		dev_warn(&intf->dev, "can't locate MII phy, using default\n");
		pegasus->phy = 1;
	}
	usb_set_intfdata(intf, pegasus);
	SET_NETDEV_DEV(net, &intf->dev);
	pegasus_reset_wol(net);
	res = register_netdev(net);
	if (res)
		goto out3;
	pr_info("%s: %s\n", net->name, usb_dev_id[dev_index].name);
	return 0;

out3:
	usb_set_intfdata(intf, NULL);
	free_skb_pool(pegasus);
out2:
	free_all_urbs(pegasus);
out1:
	free_netdev(net);
out:
	usb_put_dev(dev);
	return res;
}

static void pegasus_disconnect(struct usb_interface *intf)
{
	struct pegasus *pegasus = usb_get_intfdata(intf);

	usb_set_intfdata(intf, NULL);
	if (!pegasus) {
		warn("unregistering non-existant device");
		return;
	}

	pegasus->flags |= PEGASUS_UNPLUG;
	unregister_netdev(pegasus->net);
	usb_put_dev(interface_to_usbdev(intf));
	free_all_urbs(pegasus);
	free_skb_pool(pegasus);
	if (pegasus->rx_skb)
		dev_kfree_skb(pegasus->rx_skb);
	free_netdev(pegasus->net);
}

static int pegasus_suspend (struct usb_interface *intf, u32 state)
{
	struct pegasus *pegasus = usb_get_intfdata(intf);
	
	netif_device_detach (pegasus->net);
	return 0;
}

static int pegasus_resume (struct usb_interface *intf)
{
	struct pegasus *pegasus = usb_get_intfdata(intf);

	netif_device_attach (pegasus->net);
	return 0;
}

static struct usb_driver pegasus_driver = {
	.name = driver_name,
	.probe = pegasus_probe,
	.disconnect = pegasus_disconnect,
	.id_table = pegasus_ids,
	.suspend = pegasus_suspend,
	.resume = pegasus_resume,
};

static int __init pegasus_init(void)
{
	pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
	return usb_register(&pegasus_driver);
}

static void __exit pegasus_exit(void)
{
	usb_deregister(&pegasus_driver);
}

module_init(pegasus_init);
module_exit(pegasus_exit);