asix.c

linux-2.6.15.6

				0, 0, 6, buf)) < 0) {
		dbg("read AX_CMD_READ_NODE_ID failed: %d", ret);
		goto out2;
	}
	memcpy(dev->net->dev_addr, buf, ETH_ALEN);

	/* Get the PHY id */
	if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID,
				0, 0, 2, buf)) < 0) {
		dbg("error on read AX_CMD_READ_PHY_ID: %02x", ret);
		goto out2;
	} else if (ret < 2) {
		/* this should always return 2 bytes */
		dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
				ret);
		ret = -EIO;
		goto out2;
	}

	/* Initialize MII structure */
	dev->mii.dev = dev->net;
	dev->mii.mdio_read = ax8817x_mdio_read;
	dev->mii.mdio_write = ax8817x_mdio_write;
	dev->mii.phy_id_mask = 0x3f;
	dev->mii.reg_num_mask = 0x1f;
	dev->mii.phy_id = *((u8 *)buf + 1);
	dev->net->do_ioctl = ax8817x_ioctl;

	dev->net->set_multicast_list = ax8817x_set_multicast;
	dev->net->ethtool_ops = &ax8817x_ethtool_ops;

	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_ADVERTISE,
		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
	mii_nway_restart(&dev->mii);

	return 0;
out2:
	kfree(buf);
out1:
	return ret;
}

static struct ethtool_ops ax88772_ethtool_ops = {
	.get_drvinfo		= ax8817x_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_msglevel		= usbnet_get_msglevel,
	.set_msglevel		= usbnet_set_msglevel,
	.get_wol		= ax8817x_get_wol,
	.set_wol		= ax8817x_set_wol,
	.get_eeprom_len		= ax8817x_get_eeprom_len,
	.get_eeprom		= ax8817x_get_eeprom,
	.get_settings		= ax8817x_get_settings,
	.set_settings		= ax8817x_set_settings,
};

static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int ret;
	void *buf;

	usbnet_get_endpoints(dev,intf);

	buf = kmalloc(6, GFP_KERNEL);
	if(!buf) {
		dbg ("Cannot allocate memory for buffer");
		ret = -ENOMEM;
		goto out1;
	}

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
				     0x00B0, 0, 0, buf)) < 0)
		goto out2;

	msleep(5);
	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_PHY_SELECT,
				0x0001, 0, 0, buf)) < 0) {
		dbg("Select PHY #1 failed: %d", ret);
		goto out2;
	}

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPPD,
				0, 0, buf)) < 0) {
		dbg("Failed to power down internal PHY: %d", ret);
		goto out2;
	}

	msleep(150);
	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_CLEAR,
				0, 0, buf)) < 0) {
		dbg("Failed to perform software reset: %d", ret);
		goto out2;
	}

	msleep(150);
	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET,
	     			AX_SWRESET_IPRL | AX_SWRESET_PRL,
				0, 0, buf)) < 0) {
		dbg("Failed to set Internal/External PHY reset control: %d",
					ret);
		goto out2;
	}

	msleep(150);
	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL,
				0x0000, 0, 0, buf)) < 0) {
		dbg("Failed to reset RX_CTL: %d", ret);
		goto out2;
	}

	/* Get the MAC address */
	memset(buf, 0, ETH_ALEN);
	if ((ret = ax8817x_read_cmd(dev, AX88772_CMD_READ_NODE_ID,
				0, 0, ETH_ALEN, buf)) < 0) {
		dbg("Failed to read MAC address: %d", ret);
		goto out2;
	}
	memcpy(dev->net->dev_addr, buf, ETH_ALEN);

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII,
				0, 0, 0, buf)) < 0) {
		dbg("Enabling software MII failed: %d", ret);
		goto out2;
	}

	if (((ret = ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG,
	      			0x0010, 2, 2, buf)) < 0)
			|| (*((u16 *)buf) != 0x003b)) {
		dbg("Read PHY register 2 must be 0x3b00: %d", ret);
		goto out2;
	}

	/* Initialize MII structure */
	dev->mii.dev = dev->net;
	dev->mii.mdio_read = ax8817x_mdio_read;
	dev->mii.mdio_write = ax8817x_mdio_write;
	dev->mii.phy_id_mask = 0xff;
	dev->mii.reg_num_mask = 0xff;
	dev->net->do_ioctl = ax8817x_ioctl;

	/* Get the PHY id */
	if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID,
			0, 0, 2, buf)) < 0) {
		dbg("Error reading PHY ID: %02x", ret);
		goto out2;
	} else if (ret < 2) {
		/* this should always return 2 bytes */
		dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
		    ret);
		ret = -EIO;
		goto out2;
	}
	dev->mii.phy_id = *((u8 *)buf + 1);

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_PRL,
				0, 0, buf)) < 0) {
		dbg("Set external PHY reset pin level: %d", ret);
		goto out2;
	}
	msleep(150);
	if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_RESET,
	     			AX_SWRESET_IPRL | AX_SWRESET_PRL,
				0, 0, buf)) < 0) {
		dbg("Set Internal/External PHY reset control: %d", ret);
		goto out2;
	}
	msleep(150);


	dev->net->set_multicast_list = ax8817x_set_multicast;
	dev->net->ethtool_ops = &ax88772_ethtool_ops;

	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
	ax8817x_mdio_write_le(dev->net, dev->mii.phy_id, MII_ADVERTISE,
			ADVERTISE_ALL | ADVERTISE_CSMA);
	mii_nway_restart(&dev->mii);

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE,
				AX88772_MEDIUM_DEFAULT, 0, 0, buf)) < 0) {
		dbg("Write medium mode register: %d", ret);
		goto out2;
	}

	if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_IPG0,
				AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,
				AX88772_IPG2_DEFAULT, 0, buf)) < 0) {
		dbg("Write IPG,IPG1,IPG2 failed: %d", ret);
		goto out2;
	}
	if ((ret =
	     ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf)) < 0) {
		dbg("Failed to set hardware MII: %02x", ret);
		goto out2;
	}

	/* Set RX_CTL to default values with 2k buffer, and enable cactus */
	if ((ret =
	     ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0088, 0, 0,
			       buf)) < 0) {
		dbg("Reset RX_CTL failed: %d", ret);
		goto out2;
	}

	kfree(buf);

	/* Asix framing packs multiple eth frames into a 2K usb bulk transfer */
	if (dev->driver_info->flags & FLAG_FRAMING_AX) {
		/* hard_mtu  is still the default - the device does not support
		   jumbo eth frames */
		dev->rx_urb_size = 2048;
	}

	return 0;

out2:
	kfree(buf);
out1:
	return ret;
}

static int ax88772_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
	u8  *head;
	u32  header;
	char *packet;
	struct sk_buff *ax_skb;
	u16 size;

	head = (u8 *) skb->data;
	memcpy(&header, head, sizeof(header));
	le32_to_cpus(&header);
	packet = head + sizeof(header);

	skb_pull(skb, 4);

	while (skb->len > 0) {
		if ((short)(header & 0x0000ffff) !=
		    ~((short)((header & 0xffff0000) >> 16))) {
			devdbg(dev,"header length data is error");
		}
		/* get the packet length */
		size = (u16) (header & 0x0000ffff);

		if ((skb->len) - ((size + 1) & 0xfffe) == 0)
			return 2;
		if (size > ETH_FRAME_LEN) {
			devdbg(dev,"invalid rx length %d", size);
			return 0;
		}
		ax_skb = skb_clone(skb, GFP_ATOMIC);
		if (ax_skb) {
			ax_skb->len = size;
			ax_skb->data = packet;
			ax_skb->tail = packet + size;
			usbnet_skb_return(dev, ax_skb);
		} else {
			return 0;
		}

		skb_pull(skb, (size + 1) & 0xfffe);

		if (skb->len == 0)
			break;

		head = (u8 *) skb->data;
		memcpy(&header, head, sizeof(header));
		le32_to_cpus(&header);
		packet = head + sizeof(header);
		skb_pull(skb, 4);
	}

	if (skb->len < 0) {
		devdbg(dev,"invalid rx length %d", skb->len);
		return 0;
	}
	return 1;
}

static struct sk_buff *ax88772_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
					gfp_t flags)
{
	int padlen;
	int headroom = skb_headroom(skb);
	int tailroom = skb_tailroom(skb);
	u32 packet_len;
	u32 padbytes = 0xffff0000;

	padlen = ((skb->len + 4) % 512) ? 0 : 4;

	if ((!skb_cloned(skb))
	    && ((headroom + tailroom) >= (4 + padlen))) {
		if ((headroom < 4) || (tailroom < padlen)) {
			skb->data = memmove(skb->head + 4, skb->data, skb->len);
			skb->tail = skb->data + skb->len;
		}
	} else {
		struct sk_buff *skb2;
		skb2 = skb_copy_expand(skb, 4, padlen, flags);
		dev_kfree_skb_any(skb);
		skb = skb2;
		if (!skb)
			return NULL;
	}

	skb_push(skb, 4);
	packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
	memcpy(skb->data, &packet_len, sizeof(packet_len));

	if ((skb->len % 512) == 0) {
		memcpy( skb->tail, &padbytes, sizeof(padbytes));
		skb_put(skb, sizeof(padbytes));
	}
	return skb;
}

static int ax88772_link_reset(struct usbnet *dev)
{
	u16 lpa;
	u16 adv;
	u16 res;
	u16 mode;

	mode = AX88772_MEDIUM_DEFAULT;
	lpa = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_LPA);
	adv = ax8817x_mdio_read_le(dev->net, dev->mii.phy_id, MII_ADVERTISE);
	res = mii_nway_result(lpa|adv);

	if ((res & LPA_DUPLEX) == 0)
		mode &= ~AX88772_MEDIUM_FULL_DUPLEX;
	if ((res & LPA_100) == 0)
		mode &= ~AX88772_MEDIUM_100MB;
	ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);

	return 0;
}

static const struct driver_info ax8817x_info = {
	.description = "ASIX AX8817x USB 2.0 Ethernet",
	.bind = ax8817x_bind,
	.status = ax8817x_status,
	.link_reset = ax88172_link_reset,
	.reset = ax88172_link_reset,
	.flags =  FLAG_ETHER,
	.data = 0x00130103,
};

static const struct driver_info dlink_dub_e100_info = {
	.description = "DLink DUB-E100 USB Ethernet",
	.bind = ax8817x_bind,
	.status = ax8817x_status,
	.link_reset = ax88172_link_reset,
	.reset = ax88172_link_reset,
	.flags =  FLAG_ETHER,
	.data = 0x009f9d9f,
};

static const struct driver_info netgear_fa120_info = {
	.description = "Netgear FA-120 USB Ethernet",
	.bind = ax8817x_bind,
	.status = ax8817x_status,
	.link_reset = ax88172_link_reset,
	.reset = ax88172_link_reset,
	.flags =  FLAG_ETHER,
	.data = 0x00130103,
};

static const struct driver_info hawking_uf200_info = {
	.description = "Hawking UF200 USB Ethernet",
	.bind = ax8817x_bind,
	.status = ax8817x_status,
	.link_reset = ax88172_link_reset,
	.reset = ax88172_link_reset,
	.flags =  FLAG_ETHER,
	.data = 0x001f1d1f,
};

static const struct driver_info ax88772_info = {
	.description = "ASIX AX88772 USB 2.0 Ethernet",
	.bind = ax88772_bind,
	.status = ax8817x_status,
	.link_reset = ax88772_link_reset,
	.reset = ax88772_link_reset,
	.flags = FLAG_ETHER | FLAG_FRAMING_AX,
	.rx_fixup = ax88772_rx_fixup,
	.tx_fixup = ax88772_tx_fixup,
	.data = 0x00130103,
};

static const struct usb_device_id	products [] = {
{
	// Linksys USB200M
	USB_DEVICE (0x077b, 0x2226),
	.driver_info =	(unsigned long) &ax8817x_info,
}, {
	// Netgear FA120
	USB_DEVICE (0x0846, 0x1040),
	.driver_info =  (unsigned long) &netgear_fa120_info,
}, {
	// DLink DUB-E100
	USB_DEVICE (0x2001, 0x1a00),
	.driver_info =  (unsigned long) &dlink_dub_e100_info,
}, {
	// Intellinet, ST Lab USB Ethernet
	USB_DEVICE (0x0b95, 0x1720),
	.driver_info =  (unsigned long) &ax8817x_info,
}, {
	// Hawking UF200, TrendNet TU2-ET100
	USB_DEVICE (0x07b8, 0x420a),
	.driver_info =  (unsigned long) &hawking_uf200_info,
}, {
        // Billionton Systems, USB2AR
        USB_DEVICE (0x08dd, 0x90ff),
        .driver_info =  (unsigned long) &ax8817x_info,
}, {
	// ATEN UC210T
	USB_DEVICE (0x0557, 0x2009),
	.driver_info =  (unsigned long) &ax8817x_info,
}, {
	// Buffalo LUA-U2-KTX
	USB_DEVICE (0x0411, 0x003d),
	.driver_info =  (unsigned long) &ax8817x_info,
}, {
	// Sitecom LN-029 "USB 2.0 10/100 Ethernet adapter"
	USB_DEVICE (0x6189, 0x182d),
	.driver_info =  (unsigned long) &ax8817x_info,
}, {
	// corega FEther USB2-TX
	USB_DEVICE (0x07aa, 0x0017),
	.driver_info =  (unsigned long) &ax8817x_info,
}, {
	// Surecom EP-1427X-2
	USB_DEVICE (0x1189, 0x0893),
	.driver_info = (unsigned long) &ax8817x_info,
}, {
	// goodway corp usb gwusb2e
	USB_DEVICE (0x1631, 0x6200),
	.driver_info = (unsigned long) &ax8817x_info,
}, {
	// ASIX AX88772 10/100
        USB_DEVICE (0x0b95, 0x7720),
        .driver_info = (unsigned long) &ax88772_info,
},
	{ },		// END
};
MODULE_DEVICE_TABLE(usb, products);

static struct usb_driver asix_driver = {
	.owner =	THIS_MODULE,
	.name =		"asix",
	.id_table =	products,
	.probe =	usbnet_probe,
	.suspend =	usbnet_suspend,
	.resume =	usbnet_resume,
	.disconnect =	usbnet_disconnect,
};

static int __init asix_init(void)
{
 	return usb_register(&asix_driver);
}
module_init(asix_init);

static void __exit asix_exit(void)
{
 	usb_deregister(&asix_driver);
}
module_exit(asix_exit);

MODULE_AUTHOR("David Hollis");
MODULE_DESCRIPTION("ASIX AX8817X based USB 2.0 Ethernet Devices");
MODULE_LICENSE("GPL");