pegasus.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 1,333 行 · 第 1/3 页

static int pegasus_open(struct net_device *net)
{
	pegasus_t *pegasus = (pegasus_t *) net->priv;
	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_unlink_urb(pegasus->rx_urb);
		usb_unlink_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 = net->priv;

	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;
}
#ifdef	CONFIG_MII
static int pegasus_ethtool_ioctl(struct net_device *dev, void __user *useraddr)
{

	u32 ethcmd;
	pegasus_t *pegasus = dev->priv;

	if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
		return -EFAULT;

	switch (ethcmd) {
	/* get driver-specific version/etc. info */
	case ETHTOOL_GDRVINFO:{
			struct ethtool_drvinfo info;
			memset (&info, 0, sizeof (info));
			info.cmd = ETHTOOL_GDRVINFO;
			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));
			if (copy_to_user(useraddr, &info, sizeof (info)))
				return -EFAULT;
			return 0;
		}

	/* get settings */
	case ETHTOOL_GSET:{
			struct ethtool_cmd ecmd = { ETHTOOL_GSET };
			mii_ethtool_gset(&pegasus->mii, &ecmd);
			if (copy_to_user(useraddr, &ecmd, sizeof (ecmd)))
				return -EFAULT;
			return 0;
		}
	/* set settings */
	case ETHTOOL_SSET:{
			int r;
			struct ethtool_cmd ecmd;
			if (copy_from_user(&ecmd, useraddr, sizeof (ecmd)))
				return -EFAULT;
			r = mii_ethtool_sset(&pegasus->mii, &ecmd);
			return r;
		}
	/* restart autonegotiation */
	case ETHTOOL_NWAY_RST:{
			return mii_nway_restart(&pegasus->mii);
		}

	/* get link status */
	case ETHTOOL_GLINK:{
			struct ethtool_value edata = { ETHTOOL_GLINK };
			edata.data = mii_link_ok(&pegasus->mii);
			if (copy_to_user(useraddr, &edata, sizeof (edata)))
				return -EFAULT;
			return 0;
		}
	/* get message-level */
	case ETHTOOL_GMSGLVL:{
			struct ethtool_value edata = { ETHTOOL_GMSGLVL };
			/* edata.data = pegasus->msg_enable; FIXME */
			if (copy_to_user(useraddr, &edata, sizeof (edata)))
				return -EFAULT;
			return 0;
		}
	/* set message-level */
	case ETHTOOL_SMSGLVL:{
			struct ethtool_value edata;
			if (copy_from_user(&edata, useraddr, sizeof (edata)))
				return -EFAULT;
			/* sp->msg_enable = edata.data; FIXME */
			return 0;
		}

	}

	return -EOPNOTSUPP;

}
#else
static int pegasus_ethtool_ioctl(struct net_device *net, void __user *uaddr)
{
	pegasus_t *pegasus;
	int cmd;

	pegasus = net->priv;
	if (get_user(cmd, (int __user *) uaddr))
		return -EFAULT;
	switch (cmd) {
	case ETHTOOL_GDRVINFO:{
			struct ethtool_drvinfo info;
			memset (&info, 0, sizeof (info));
			info.cmd = ETHTOOL_GDRVINFO;
			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));
			if (copy_to_user(uaddr, &info, sizeof (info)))
				return -EFAULT;
			return 0;
		}
	case ETHTOOL_GSET:{
			struct ethtool_cmd ecmd;
			short lpa, bmcr;
			u8 port;

			memset(&ecmd, 0, sizeof (ecmd));
			ecmd.supported = (SUPPORTED_10baseT_Half |
					  SUPPORTED_10baseT_Full |
					  SUPPORTED_100baseT_Half |
					  SUPPORTED_100baseT_Full |
					  SUPPORTED_Autoneg |
					  SUPPORTED_TP | SUPPORTED_MII);
			get_registers(pegasus, Reg7b, 1, &port);
			if (port == 0)
				ecmd.port = PORT_MII;
			else
				ecmd.port = PORT_TP;
			ecmd.transceiver = XCVR_INTERNAL;
			ecmd.phy_address = pegasus->phy;
			read_mii_word(pegasus, pegasus->phy, MII_BMCR, &bmcr);
			read_mii_word(pegasus, pegasus->phy, MII_LPA, &lpa);
			if (bmcr & BMCR_ANENABLE) {
				ecmd.autoneg = AUTONEG_ENABLE;
				ecmd.speed = lpa & (LPA_100HALF | LPA_100FULL) ?
				    SPEED_100 : SPEED_10;
				if (ecmd.speed == SPEED_100)
					ecmd.duplex = lpa & LPA_100FULL ?
					    DUPLEX_FULL : DUPLEX_HALF;
				else
					ecmd.duplex = lpa & LPA_10FULL ?
					    DUPLEX_FULL : DUPLEX_HALF;
			} else {
				ecmd.autoneg = AUTONEG_DISABLE;
				ecmd.speed = bmcr & BMCR_SPEED100 ?
				    SPEED_100 : SPEED_10;
				ecmd.duplex = bmcr & BMCR_FULLDPLX ?
				    DUPLEX_FULL : DUPLEX_HALF;
			}
			if (copy_to_user(uaddr, &ecmd, sizeof (ecmd)))
				return -EFAULT;

			return 0;
		}
	case ETHTOOL_SSET:{
			return -EOPNOTSUPP;
		}
	case ETHTOOL_GLINK:{
			struct ethtool_value edata = { ETHTOOL_GLINK };
			edata.data = netif_carrier_ok(net);
			if (copy_to_user(uaddr, &edata, sizeof (edata)))
				return -EFAULT;
			return 0;
		}
	default:
		return -EOPNOTSUPP;
	}
}
#endif
static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
	__u16 *data = (__u16 *) & rq->ifr_ifru;
	pegasus_t *pegasus = net->priv;
	int res;

	switch (cmd) {
	case SIOCETHTOOL:
		res = pegasus_ethtool_ioctl(net, rq->ifr_data);
		break;
	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 = net->priv;

	if (net->flags & IFF_PROMISC) {
		pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
		info("%s: Promiscuous mode enabled", 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;
		info("%s set allmulti", 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)
{
	u16 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);
	if (!(pegasus = kmalloc(sizeof (struct pegasus), GFP_KERNEL))) {
		err("out of memory allocating device structure");
		goto out;
	}

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

	if (!alloc_urbs(pegasus))
		goto out1;

	net = alloc_etherdev(0);
	if (!net)
		goto out2;

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

	pegasus->usb = dev;
	pegasus->net = net;
	SET_MODULE_OWNER(net);
	net->priv = pegasus;
	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;
	net->mtu = PEGASUS_MTU;
	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)) {
		err("can't reset MAC");
		res = -EIO;
		goto out3;
	}
	set_ethernet_addr(pegasus);
	fill_skb_pool(pegasus);
	if (pegasus->features & PEGASUS_II) {
		info("setup Pegasus II specific registers");
		setup_pegasus_II(pegasus);
	}
	pegasus->phy = mii_phy_probe(pegasus);
	if (pegasus->phy == 0xff) {
		warn("can't locate MII phy, using default");
		pegasus->phy = 1;
	}
	usb_set_intfdata(intf, pegasus);
	SET_NETDEV_DEV(net, &intf->dev);
	res = register_netdev(net);
	if (res)
		goto out4;
	printk("%s: %s\n", net->name, usb_dev_id[dev_index].name);
	return 0;

out4:
	usb_set_intfdata(intf, NULL);
	free_skb_pool(pegasus);
out3:
	free_netdev(net);
out2:
	free_all_urbs(pegasus);
out1:
	kfree(pegasus);
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);
	kfree(pegasus);
}

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

static int __init pegasus_init(void)
{
	info(DRIVER_VERSION ":" DRIVER_DESC);
	return usb_register(&pegasus_driver);
}

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

module_init(pegasus_init);
module_exit(pegasus_exit);