catc.c

linux2.4.20下的针对三星公司的s3c2410的usb模块驱动代码

	if (urb->status)
		dbg("ctrl_done, status %d, len %d.", urb->status, urb->actual_length);

	spin_lock_irqsave(&catc->ctrl_lock, flags);

	q = catc->ctrl_queue + catc->ctrl_tail;

	if (q->dir) {
		if (q->buf && q->len)
			memcpy(q->buf, catc->ctrl_buf, q->len);
		else
			q->buf = catc->ctrl_buf;
	}

	if (q->callback)
		q->callback(catc, q);

	catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);

	if (catc->ctrl_head != catc->ctrl_tail)
		catc_ctrl_run(catc);
	else
		clear_bit(CTRL_RUNNING, &catc->flags);

	spin_unlock_irqrestore(&catc->ctrl_lock, flags);
}

static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
	u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
{
	struct ctrl_queue *q;
	int retval = 0;
	unsigned long flags;

	spin_lock_irqsave(&catc->ctrl_lock, flags);
	
	q = catc->ctrl_queue + catc->ctrl_head;

	q->dir = dir;
	q->request = request;
	q->value = value;
	q->index = index;
	q->buf = buf;
	q->len = len;
	q->callback = callback;

	catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);

	if (catc->ctrl_head == catc->ctrl_tail) {
		err("ctrl queue full");
		catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
		retval = -1;
	}

	if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
		catc_ctrl_run(catc);

	spin_unlock_irqrestore(&catc->ctrl_lock, flags);

	return retval;
}

/*
 * Statistics.
 */

static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
{
	int index = q->index - EthStats;
	u16 data, last;

	catc->stats_buf[index] = *((char *)q->buf);

	if (index & 1)
		return;

	data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
	last = catc->stats_vals[index >> 1];

	switch (index) {
		case TxSingleColl:
		case TxMultiColl:
			catc->stats.collisions += data - last;
			break;
		case TxExcessColl:
			catc->stats.tx_aborted_errors += data - last;
			catc->stats.tx_errors += data - last;
			break;
		case RxFramErr:
			catc->stats.rx_frame_errors += data - last;
			catc->stats.rx_errors += data - last;
			break;
	}

	catc->stats_vals[index >> 1] = data;
}

static void catc_stats_timer(unsigned long data)
{
	struct catc *catc = (void *) data;
	int i;

	for (i = 0; i < 8; i++)
		catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);

	mod_timer(&catc->timer, jiffies + STATS_UPDATE);
}

static struct net_device_stats *catc_get_stats(struct net_device *netdev)
{
	struct catc *catc = netdev->priv;
	return &catc->stats;
}

/*
 * Receive modes. Broadcast, Multicast, Promisc.
 */

static inline u32 ether_crc_le(int cnt, unsigned char *addr)
{
	unsigned int crc = 0xffffffff;
	u8 byte, idx, bit;
	
        for (idx = 0; idx < cnt; idx++)
                for (byte = *addr++, bit = 0; bit < 8; bit++, byte >>= 1)
                        crc = (crc >> 1) ^ (((crc ^ byte) & 1) ? 0xedb88320U : 0);
	return crc;
}

static void catc_multicast(unsigned char *addr, u8 *multicast)
{
	unsigned int crc = ether_crc_le(6, addr);
	multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
}

static void catc_set_multicast_list(struct net_device *netdev)
{
	struct catc *catc = netdev->priv;
	struct dev_mc_list *mc;
	u8 broadcast[6];
	u8 rx = RxEnable | RxPolarity | RxMultiCast;
	int i;

	memset(broadcast, 0xff, 6);
	memset(catc->multicast, 0, 64);

	catc_multicast(broadcast, catc->multicast);
	catc_multicast(netdev->dev_addr, catc->multicast);

	if (netdev->flags & IFF_PROMISC) {
		memset(catc->multicast, 0xff, 64);
		rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
	} 

	if (netdev->flags & IFF_ALLMULTI) {
		memset(catc->multicast, 0xff, 64);
	} else {
		for (i = 0, mc = netdev->mc_list; mc && i < netdev->mc_count; i++, mc = mc->next) {
			u32 crc = ether_crc_le(6, mc->dmi_addr);
			if (!catc->is_f5u011) {
				catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
			} else {
				catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
			}
		}
	}
	if (!catc->is_f5u011) {
		catc_set_reg_async(catc, RxUnit, rx);
		catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
	} else {
		f5u011_mchash_async(catc, catc->multicast);
		if (catc->rxmode[0] != rx) {
			catc->rxmode[0] = rx;
			dbg("Setting RX mode to %2.2X %2.2X", catc->rxmode[0],
			    catc->rxmode[1]);
			f5u011_rxmode_async(catc, catc->rxmode);
		}
	}
}

/*
 * ioctl's
 */
static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr)
{
        struct catc *catc = dev->priv;
        u32 cmd;
	char tmp[40];
        
        if (get_user(cmd, (u32 *)useraddr))
                return -EFAULT;

        switch (cmd) {
        /* get driver info */
        case ETHTOOL_GDRVINFO: {
                struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
                strncpy(info.driver, SHORT_DRIVER_DESC, ETHTOOL_BUSINFO_LEN);
                strncpy(info.version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
		sprintf(tmp, "usb%d:%d", catc->usbdev->bus->busnum, catc->usbdev->devnum);
                strncpy(info.bus_info, tmp,ETHTOOL_BUSINFO_LEN);
                if (copy_to_user(useraddr, &info, sizeof(info)))
                        return -EFAULT;
                return 0;
        }

	/* get settings */
	case ETHTOOL_GSET:
		if (catc->is_f5u011) {
			struct ethtool_cmd ecmd = { 
				ETHTOOL_GSET, 
				SUPPORTED_10baseT_Half | SUPPORTED_TP, 
				ADVERTISED_10baseT_Half | ADVERTISED_TP, 
				SPEED_10, 
				DUPLEX_HALF, 
				PORT_TP, 
				0, 
				XCVR_INTERNAL, 
				AUTONEG_DISABLE, 
				1, 
				1 
			};
			if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
				return -EFAULT;
			return 0;
		} else {
			return -EOPNOTSUPP;
		}

        /* get link status */
        case ETHTOOL_GLINK: {
                struct ethtool_value edata = {ETHTOOL_GLINK};
                edata.data = netif_carrier_ok(dev);
                if (copy_to_user(useraddr, &edata, sizeof(edata)))
                        return -EFAULT;
                return 0;
        }
	}
        /* Note that the ethtool user space code requires EOPNOTSUPP */
        return -EOPNOTSUPP;
}

static int catc_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
        switch(cmd) {
        case SIOCETHTOOL:
	       return netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
        default:
	       return -ENOTTY; /* Apparently this is the standard ioctl errno */
        }
}


/*
 * Open, close.
 */

static int catc_open(struct net_device *netdev)
{
	struct catc *catc = netdev->priv;
	int status;

	catc->irq_urb.dev = catc->usbdev;
	if ((status = usb_submit_urb(&catc->irq_urb)) < 0) {
		err("submit(irq_urb) status %d", status);
		return -1;
	}

	netif_start_queue(netdev);

	if (!catc->is_f5u011)
		mod_timer(&catc->timer, jiffies + STATS_UPDATE);

	return 0;
}

static int catc_stop(struct net_device *netdev)
{
	struct catc *catc = netdev->priv;

	netif_stop_queue(netdev);

	if (!catc->is_f5u011)
		del_timer_sync(&catc->timer);

	usb_unlink_urb(&catc->rx_urb);
	usb_unlink_urb(&catc->tx_urb);
	usb_unlink_urb(&catc->irq_urb);
	usb_unlink_urb(&catc->ctrl_urb);

	return 0;
}

/*
 * USB probe, disconnect.
 */

static void *catc_probe(struct usb_device *usbdev, unsigned int ifnum, const struct usb_device_id *id)
{
	struct net_device *netdev;
	struct catc *catc;
	u8 broadcast[6];
	int i, pktsz;

	if (usb_set_interface(usbdev, ifnum, 1)) {
                err("Can't set altsetting 1.");
		return NULL;
	}

	catc = kmalloc(sizeof(struct catc), GFP_KERNEL);
	if (!catc)
		return NULL;

	memset(catc, 0, sizeof(struct catc));

	netdev = init_etherdev(0, 0);
	if (!netdev) {
		kfree(catc);
		return NULL;
	}

	netdev->open = catc_open;
	netdev->hard_start_xmit = catc_hard_start_xmit;
	netdev->stop = catc_stop;
	netdev->get_stats = catc_get_stats;
	netdev->tx_timeout = catc_tx_timeout;
	netdev->watchdog_timeo = TX_TIMEOUT;
	netdev->set_multicast_list = catc_set_multicast_list;
	netdev->do_ioctl = catc_ioctl;
	netdev->priv = catc;

	catc->usbdev = usbdev;
	catc->netdev = netdev;

	catc->tx_lock = SPIN_LOCK_UNLOCKED;
	catc->ctrl_lock = SPIN_LOCK_UNLOCKED;

	init_timer(&catc->timer);
	catc->timer.data = (long) catc;
	catc->timer.function = catc_stats_timer;

	/* The F5U011 has the same vendor/product as the netmate 
	 *  but a device version of 0x130
	 */
	if (usbdev->descriptor.idVendor == 0x0423 && 
	    usbdev->descriptor.idProduct == 0xa &&
	    catc->usbdev->descriptor.bcdDevice == 0x0130) {
		dbg("Testing for f5u011");
		catc->is_f5u011 = 1;
		atomic_set(&catc->recq_sz, 0);
		pktsz = RX_PKT_SZ;
	} else {
		pktsz = RX_MAX_BURST * (PKT_SZ + 2);
	}

	FILL_CONTROL_URB(&catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
		NULL, NULL, 0, catc_ctrl_done, catc);

	FILL_BULK_URB(&catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
		NULL, 0, catc_tx_done, catc);

	FILL_BULK_URB(&catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
		catc->rx_buf, pktsz, catc_rx_done, catc);

	FILL_INT_URB(&catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
                catc->irq_buf, 2, catc_irq_done, catc, 1);

	if (!catc->is_f5u011) {
		dbg("Checking memory size\n");

		i = 0x12345678;
		catc_write_mem(catc, 0x7a80, &i, 4);
		i = 0x87654321;	
		catc_write_mem(catc, 0xfa80, &i, 4);
		catc_read_mem(catc, 0x7a80, &i, 4);
	  
		switch (i) {
		case 0x12345678:
			catc_set_reg(catc, TxBufCount, 8);
			catc_set_reg(catc, RxBufCount, 32);
			dbg("64k Memory\n");
			break;
		default:
			warn("Couldn't detect memory size, assuming 32k");
		case 0x87654321:
			catc_set_reg(catc, TxBufCount, 4);
			catc_set_reg(catc, RxBufCount, 16);
			dbg("32k Memory\n");
			break;
		}
	  
		dbg("Getting MAC from SEEROM.");
	  
		catc_get_mac(catc, netdev->dev_addr);
		
		dbg("Setting MAC into registers.");
	  
		for (i = 0; i < 6; i++)
			catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
		
		dbg("Filling the multicast list.");
	  
		memset(broadcast, 0xff, 6);
		catc_multicast(broadcast, catc->multicast);
		catc_multicast(netdev->dev_addr, catc->multicast);
		catc_write_mem(catc, 0xfa80, catc->multicast, 64);
		
		dbg("Clearing error counters.");
		
		for (i = 0; i < 8; i++)
			catc_set_reg(catc, EthStats + i, 0);
		catc->last_stats = jiffies;
		
		dbg("Enabling.");
		
		catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
		catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
		catc_set_reg(catc, LEDCtrl, LEDLink);
		catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
	} else {
		dbg("Performing reset\n");
		catc_reset(catc);
		catc_get_mac(catc, netdev->dev_addr);
		
		dbg("Setting RX Mode");
		catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
		catc->rxmode[1] = 0;
		f5u011_rxmode(catc, catc->rxmode);
	}
	dbg("Init done.");
	printk(KERN_INFO "%s: %s USB Ethernet at usb%d:%d.%d, ",
	       netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
	       usbdev->bus->busnum, usbdev->devnum, ifnum);
	for (i = 0; i < 5; i++) printk("%2.2x:", netdev->dev_addr[i]);
	printk("%2.2x.\n", netdev->dev_addr[i]);
	return catc;
}

static void catc_disconnect(struct usb_device *usbdev, void *dev_ptr)
{
	struct catc *catc = dev_ptr;
	unregister_netdev(catc->netdev);
	kfree(catc->netdev);
	kfree(catc);
}

/*
 * Module functions and tables.
 */

static struct usb_device_id catc_id_table [] = {
	{ USB_DEVICE(0x0423, 0xa) },	/* CATC Netmate, Belkin F5U011 */
	{ USB_DEVICE(0x0423, 0xc) },	/* CATC Netmate II, Belkin F5U111 */
	{ USB_DEVICE(0x08d1, 0x1) },	/* smartBridges smartNIC */
	{ }
};

MODULE_DEVICE_TABLE(usb, catc_id_table);

static struct usb_driver catc_driver = {
	name:		"catc",
	probe:		catc_probe,
	disconnect:	catc_disconnect,
	id_table:	catc_id_table,
};

static int __init catc_init(void)
{
	info(DRIVER_VERSION " " DRIVER_DESC);
	usb_register(&catc_driver);
	return 0;
}

static void __exit catc_exit(void)
{
	usb_deregister(&catc_driver);
}

module_init(catc_init);
module_exit(catc_exit);