[deliverable/linux.git] / drivers / net / usb / asix_common.c

/*
 * ASIX AX8817X based USB 2.0 Ethernet Devices
 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
 * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
 * Copyright (c) 2002-2003 TiVo Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "asix.h"

int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
		  u16 size, void *data)
{
	int ret;
	ret = usbnet_read_cmd(dev, cmd,
			       USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			       value, index, data, size);

	if (ret != size && ret >= 0)
		return -EINVAL;
	return ret;
}

int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
		   u16 size, void *data)
{
	return usbnet_write_cmd(dev, cmd,
				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				value, index, data, size);
}

void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
			  u16 size, void *data)
{
	usbnet_write_cmd_async(dev, cmd,
			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			       value, index, data, size);
}

int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
			   struct asix_rx_fixup_info *rx)
{
	int offset = 0;
	u16 size;

	while (offset + sizeof(u16) <= skb->len) {
		u16 copy_length;
		unsigned char *data;

		if (!rx->remaining) {
			if (skb->len - offset == sizeof(u16)) {
				rx->header = get_unaligned_le16(
						skb->data + offset);
				rx->split_head = true;
				offset += sizeof(u16);
				break;
			}

			if (rx->split_head == true) {
				rx->header |= (get_unaligned_le16(
						skb->data + offset) << 16);
				rx->split_head = false;
				offset += sizeof(u16);
			} else {
				rx->header = get_unaligned_le32(skb->data +
								offset);
				offset += sizeof(u32);
			}

			/* take frame length from Data header 32-bit word */
			size = (u16)(rx->header & 0x7ff);
			if (size != ((~rx->header >> 16) & 0x7ff)) {
				netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
					   rx->header, offset);
				return 0;
			}
			if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
				netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
					   size);
				return 0;
			}

			rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
			if (!rx->ax_skb)
				return 0;

			rx->remaining = size;
		}

		if (rx->remaining > skb->len - offset) {
			copy_length = skb->len - offset;
			rx->remaining -= copy_length;
		} else {
			copy_length = rx->remaining;
			rx->remaining = 0;
		}

		data = skb_put(rx->ax_skb, copy_length);
		memcpy(data, skb->data + offset, copy_length);
		if (!rx->remaining)
			usbnet_skb_return(dev, rx->ax_skb);

		offset += (copy_length + 1) & 0xfffe;
	}

	if (skb->len != offset) {
		netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
			   skb->len, offset);
		return 0;
	}

	return 1;
}

int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
{
	struct asix_common_private *dp = dev->driver_priv;
	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;

	return asix_rx_fixup_internal(dev, skb, rx);
}

struct sk_buff *asix_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) & (dev->maxpacket - 1)) ? 0 : 4;

	/* We need to push 4 bytes in front of frame (packet_len)
	 * and maybe add 4 bytes after the end (if padlen is 4)
	 *
	 * Avoid skb_copy_expand() expensive call, using following rules :
	 * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
	 *   is false (and if we have 4 bytes of headroom)
	 * - We are allowed to put 4 bytes at tail if skb_cloned()
	 *   is false (and if we have 4 bytes of tailroom)
	 *
	 * TCP packets for example are cloned, but skb_header_release()
	 * was called in tcp stack, allowing us to use headroom for our needs.
	 */
	if (!skb_header_cloned(skb) &&
	    !(padlen && skb_cloned(skb)) &&
	    headroom + tailroom >= 4 + padlen) {
		/* following should not happen, but better be safe */
		if (headroom < 4 ||
		    tailroom < padlen) {
			skb->data = memmove(skb->head + 4, skb->data, skb->len);
			skb_set_tail_pointer(skb, 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;
	}

	packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
	skb_push(skb, 4);
	cpu_to_le32s(&packet_len);
	skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));

	if (padlen) {
		cpu_to_le32s(&padbytes);
		memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
		skb_put(skb, sizeof(padbytes));
	}

	usbnet_set_skb_tx_stats(skb, 1, 0);
	return skb;
}

int asix_set_sw_mii(struct usbnet *dev)
{
	int ret;
	ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to enable software MII access\n");
	return ret;
}

int asix_set_hw_mii(struct usbnet *dev)
{
	int ret;
	ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to enable hardware MII access\n");
	return ret;
}

int asix_read_phy_addr(struct usbnet *dev, int internal)
{
	int offset = (internal ? 1 : 0);
	u8 buf[2];
	int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);

	netdev_dbg(dev->net, "asix_get_phy_addr()\n");

	if (ret < 0) {
		netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
		goto out;
	}
	netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
		   *((__le16 *)buf));
	ret = buf[offset];

out:
	return ret;
}

int asix_get_phy_addr(struct usbnet *dev)
{
	/* return the address of the internal phy */
	return asix_read_phy_addr(dev, 1);
}


int asix_sw_reset(struct usbnet *dev, u8 flags)
{
	int ret;

        ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);

	return ret;
}

u16 asix_read_rx_ctl(struct usbnet *dev)
{
	__le16 v;
	int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);

	if (ret < 0) {
		netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
		goto out;
	}
	ret = le16_to_cpu(v);
out:
	return ret;
}

int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
{
	int ret;

	netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
	ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
			   mode, ret);

	return ret;
}

u16 asix_read_medium_status(struct usbnet *dev)
{
	__le16 v;
	int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);

	if (ret < 0) {
		netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
			   ret);
		return ret;	/* TODO: callers not checking for error ret */
	}

	return le16_to_cpu(v);

}

int asix_write_medium_mode(struct usbnet *dev, u16 mode)
{
	int ret;

	netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
	ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
			   mode, ret);

	return ret;
}

int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
{
	int ret;

	netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
	ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
	if (ret < 0)
		netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
			   value, ret);

	if (sleep)
		msleep(sleep);

	return ret;
}

/*
 * AX88772 & AX88178 have a 16-bit RX_CTL value
 */
void asix_set_multicast(struct net_device *net)
{
	struct usbnet *dev = netdev_priv(net);
	struct asix_data *data = (struct asix_data *)&dev->data;
	u16 rx_ctl = AX_DEFAULT_RX_CTL;

	if (net->flags & IFF_PROMISC) {
		rx_ctl |= AX_RX_CTL_PRO;
	} else if (net->flags & IFF_ALLMULTI ||
		   netdev_mc_count(net) > AX_MAX_MCAST) {
		rx_ctl |= AX_RX_CTL_AMALL;
	} else if (netdev_mc_empty(net)) {
		/* just broadcast and directed */
	} else {
		/* We use the 20 byte dev->data
		 * for our 8 byte filter buffer
		 * to avoid allocating memory that
		 * is tricky to free later */
		struct netdev_hw_addr *ha;
		u32 crc_bits;

		memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);

		/* Build the multicast hash filter. */
		netdev_for_each_mc_addr(ha, net) {
			crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
			data->multi_filter[crc_bits >> 3] |=
			    1 << (crc_bits & 7);
		}

		asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
				   AX_MCAST_FILTER_SIZE, data->multi_filter);

		rx_ctl |= AX_RX_CTL_AM;
	}

	asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
}

int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
	struct usbnet *dev = netdev_priv(netdev);
	__le16 res;

	mutex_lock(&dev->phy_mutex);
	asix_set_sw_mii(dev);
	asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
				(__u16)loc, 2, &res);
	asix_set_hw_mii(dev);
	mutex_unlock(&dev->phy_mutex);

	netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
		   phy_id, loc, le16_to_cpu(res));

	return le16_to_cpu(res);
}

void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
{
	struct usbnet *dev = netdev_priv(netdev);
	__le16 res = cpu_to_le16(val);

	netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
		   phy_id, loc, val);
	mutex_lock(&dev->phy_mutex);
	asix_set_sw_mii(dev);
	asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
	asix_set_hw_mii(dev);
	mutex_unlock(&dev->phy_mutex);
}

void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
{
	struct usbnet *dev = netdev_priv(net);
	u8 opt;

	if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
		wolinfo->supported = 0;
		wolinfo->wolopts = 0;
		return;
	}
	wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
	wolinfo->wolopts = 0;
	if (opt & AX_MONITOR_LINK)
		wolinfo->wolopts |= WAKE_PHY;
	if (opt & AX_MONITOR_MAGIC)
		wolinfo->wolopts |= WAKE_MAGIC;
}

int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
{
	struct usbnet *dev = netdev_priv(net);
	u8 opt = 0;

	if (wolinfo->wolopts & WAKE_PHY)
		opt |= AX_MONITOR_LINK;
	if (wolinfo->wolopts & WAKE_MAGIC)
		opt |= AX_MONITOR_MAGIC;

	if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
			      opt, 0, 0, NULL) < 0)
		return -EINVAL;

	return 0;
}

int asix_get_eeprom_len(struct net_device *net)
{
	return AX_EEPROM_LEN;
}

int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
		    u8 *data)
{
	struct usbnet *dev = netdev_priv(net);
	u16 *eeprom_buff;
	int first_word, last_word;
	int i;

	if (eeprom->len == 0)
		return -EINVAL;

	eeprom->magic = AX_EEPROM_MAGIC;

	first_word = eeprom->offset >> 1;
	last_word = (eeprom->offset + eeprom->len - 1) >> 1;

	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
			      GFP_KERNEL);
	if (!eeprom_buff)
		return -ENOMEM;

	/* ax8817x returns 2 bytes from eeprom on read */
	for (i = first_word; i <= last_word; i++) {
		if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
				  &(eeprom_buff[i - first_word])) < 0) {
			kfree(eeprom_buff);
			return -EIO;
		}
	}

	memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
	kfree(eeprom_buff);
	return 0;
}

int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
		    u8 *data)
{
	struct usbnet *dev = netdev_priv(net);
	u16 *eeprom_buff;
	int first_word, last_word;
	int i;
	int ret;

	netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
		   eeprom->len, eeprom->offset, eeprom->magic);

	if (eeprom->len == 0)
		return -EINVAL;

	if (eeprom->magic != AX_EEPROM_MAGIC)
		return -EINVAL;

	first_word = eeprom->offset >> 1;
	last_word = (eeprom->offset + eeprom->len - 1) >> 1;

	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
			      GFP_KERNEL);
	if (!eeprom_buff)
		return -ENOMEM;

	/* align data to 16 bit boundaries, read the missing data from
	   the EEPROM */
	if (eeprom->offset & 1) {
		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
				    &(eeprom_buff[0]));
		if (ret < 0) {
			netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
			goto free;
		}
	}

	if ((eeprom->offset + eeprom->len) & 1) {
		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
				    &(eeprom_buff[last_word - first_word]));
		if (ret < 0) {
			netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
			goto free;
		}
	}

	memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);

	/* write data to EEPROM */
	ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
	if (ret < 0) {
		netdev_err(net, "Failed to enable EEPROM write\n");
		goto free;
	}
	msleep(20);

	for (i = first_word; i <= last_word; i++) {
		netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
			   i, eeprom_buff[i - first_word]);
		ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
				     eeprom_buff[i - first_word], 0, NULL);
		if (ret < 0) {
			netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
				   i);
			goto free;
		}
		msleep(20);
	}

	ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
	if (ret < 0) {
		netdev_err(net, "Failed to disable EEPROM write\n");
		goto free;
	}

	ret = 0;
free:
	kfree(eeprom_buff);
	return ret;
}

void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
{
	/* Inherit standard device info */
	usbnet_get_drvinfo(net, info);
	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
	info->eedump_len = AX_EEPROM_LEN;
}

int asix_set_mac_address(struct net_device *net, void *p)
{
	struct usbnet *dev = netdev_priv(net);
	struct asix_data *data = (struct asix_data *)&dev->data;
	struct sockaddr *addr = p;

	if (netif_running(net))
		return -EBUSY;
	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);

	/* We use the 20 byte dev->data
	 * for our 6 byte mac buffer
	 * to avoid allocating memory that
	 * is tricky to free later */
	memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
	asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
							data->mac_addr);

	return 0;
}
Commit	Line	Data
2e55cc72 DB	1	/*
2e55cc72 DB	2	* ASIX AX8817X based USB 2.0 Ethernet Devices
933a27d3	3	* Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
2e55cc72	4	* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
933a27d3	5	* Copyright (C) 2006 James Painter <jamie.painter@iname.com>
2e55cc72 DB	6	* Copyright (c) 2002-2003 TiVo Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
9cb00073	19	* along with this program; if not, see <http://www.gnu.org/licenses/>.
2e55cc72 DB	20	*/
2e55cc72 DB	21
607740bc CR	22	#include "asix.h"
	23
	24	int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
	25	u16 size, void *data)
2e55cc72	26	{
0bc69efb ML	27	int ret;
	28	ret = usbnet_read_cmd(dev, cmd,
	29	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	30	value, index, data, size);
	31
	32	if (ret != size && ret >= 0)
	33	return -EINVAL;
	34	return ret;
2e55cc72 DB	35	}
2e55cc72 DB	36
607740bc CR	37	int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
607740bc CR	38	u16 size, void *data)
2e55cc72	39	{
0bc69efb ML	40	return usbnet_write_cmd(dev, cmd,
	41	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	42	value, index, data, size);
2e55cc72 DB	43	}
2e55cc72 DB	44
607740bc CR	45	void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
607740bc CR	46	u16 size, void *data)
933a27d3	47	{
0bc69efb ML	48	usbnet_write_cmd_async(dev, cmd,
	49	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	50	value, index, data, size);
933a27d3 DH	51	}
933a27d3 DH	52
8b5b6f54 LS	53	int asix_rx_fixup_internal(struct usbnet dev, struct sk_buff skb,
8b5b6f54 LS	54	struct asix_rx_fixup_info *rx)
933a27d3	55	{
a9e0aca4	56	int offset = 0;
7b0378f5	57	u16 size;
933a27d3	58
8b5b6f54	59	while (offset + sizeof(u16) <= skb->len) {
7b0378f5	60	u16 copy_length;
8b5b6f54	61	unsigned char *data;
933a27d3	62
7b0378f5	63	if (!rx->remaining) {
3bfc69ab DJ	64	if (skb->len - offset == sizeof(u16)) {
	65	rx->header = get_unaligned_le16(
	66	skb->data + offset);
	67	rx->split_head = true;
	68	offset += sizeof(u16);
	69	break;
	70	}
	71
	72	if (rx->split_head == true) {
	73	rx->header \|= (get_unaligned_le16(
	74	skb->data + offset) << 16);
	75	rx->split_head = false;
	76	offset += sizeof(u16);
8b5b6f54 LS	77	} else {
	78	rx->header = get_unaligned_le32(skb->data +
	79	offset);
	80	offset += sizeof(u32);
	81	}
bc466e67	82
7b0378f5 DJ	83	/* take frame length from Data header 32-bit word */
	84	size = (u16)(rx->header & 0x7ff);
	85	if (size != ((~rx->header >> 16) & 0x7ff)) {
8b5b6f54 LS	86	netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
8b5b6f54 LS	87	rx->header, offset);
8b5b6f54 LS	88	return 0;
8b5b6f54 LS	89	}
9a5ccd8e DJ	90	if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
	91	netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
	92	size);
	93	return 0;
	94	}
	95
7b0378f5	96	rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
8b5b6f54 LS	97	if (!rx->ax_skb)
8b5b6f54 LS	98	return 0;
3f78d1f2	99
9a5ccd8e	100	rx->remaining = size;
933a27d3	101	}
933a27d3	102
7b0378f5 DJ	103	if (rx->remaining > skb->len - offset) {
	104	copy_length = skb->len - offset;
	105	rx->remaining -= copy_length;
	106	} else {
	107	copy_length = rx->remaining;
	108	rx->remaining = 0;
8b5b6f54	109	}
933a27d3	110
7b0378f5 DJ	111	data = skb_put(rx->ax_skb, copy_length);
	112	memcpy(data, skb->data + offset, copy_length);
	113	if (!rx->remaining)
8b5b6f54 LS	114	usbnet_skb_return(dev, rx->ax_skb);
8b5b6f54 LS	115
7b0378f5	116	offset += (copy_length + 1) & 0xfffe;
933a27d3 DH	117	}
933a27d3 DH	118
a9e0aca4	119	if (skb->len != offset) {
8b5b6f54 LS	120	netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
8b5b6f54 LS	121	skb->len, offset);
933a27d3 DH	122	return 0;
933a27d3 DH	123	}
8b5b6f54	124
933a27d3 DH	125	return 1;
	126	}
	127
8b5b6f54 LS	128	int asix_rx_fixup_common(struct usbnet dev, struct sk_buff skb)
	129	{
	130	struct asix_common_private *dp = dev->driver_priv;
	131	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
	132
	133	return asix_rx_fixup_internal(dev, skb, rx);
	134	}
	135
607740bc CR	136	struct sk_buff asix_tx_fixup(struct usbnet dev, struct sk_buff *skb,
607740bc CR	137	gfp_t flags)
933a27d3 DH	138	{
	139	int padlen;
	140	int headroom = skb_headroom(skb);
	141	int tailroom = skb_tailroom(skb);
	142	u32 packet_len;
	143	u32 padbytes = 0xffff0000;
	144
2a580949	145	padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
933a27d3	146
95162d65 ED	147	/* We need to push 4 bytes in front of frame (packet_len)
	148	* and maybe add 4 bytes after the end (if padlen is 4)
	149	*
	150	* Avoid skb_copy_expand() expensive call, using following rules :
	151	* - We are allowed to push 4 bytes in headroom if skb_header_cloned()
	152	* is false (and if we have 4 bytes of headroom)
	153	* - We are allowed to put 4 bytes at tail if skb_cloned()
	154	* is false (and if we have 4 bytes of tailroom)
	155	*
	156	* TCP packets for example are cloned, but skb_header_release()
	157	* was called in tcp stack, allowing us to use headroom for our needs.
	158	*/
	159	if (!skb_header_cloned(skb) &&
	160	!(padlen && skb_cloned(skb)) &&
	161	headroom + tailroom >= 4 + padlen) {
	162	/* following should not happen, but better be safe */
	163	if (headroom < 4 \|\|
	164	tailroom < padlen) {
933a27d3	165	skb->data = memmove(skb->head + 4, skb->data, skb->len);
27a884dc	166	skb_set_tail_pointer(skb, skb->len);
933a27d3 DH	167	}
	168	} else {
	169	struct sk_buff *skb2;
95162d65	170
933a27d3 DH	171	skb2 = skb_copy_expand(skb, 4, padlen, flags);
	172	dev_kfree_skb_any(skb);
	173	skb = skb2;
	174	if (!skb)
	175	return NULL;
	176	}
	177
95162d65	178	packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
933a27d3	179	skb_push(skb, 4);
57e4f041	180	cpu_to_le32s(&packet_len);
27d7ff46	181	skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
933a27d3	182
2a580949	183	if (padlen) {
57e4f041	184	cpu_to_le32s(&padbytes);
27a884dc	185	memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
933a27d3 DH	186	skb_put(skb, sizeof(padbytes));
933a27d3 DH	187	}
1e9e39f4	188
7a1e890e	189	usbnet_set_skb_tx_stats(skb, 1, 0);
933a27d3 DH	190	return skb;
	191	}
	192
607740bc	193	int asix_set_sw_mii(struct usbnet *dev)
48b1be6a DH	194	{
	195	int ret;
	196	ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
	197	if (ret < 0)
60b86755	198	netdev_err(dev->net, "Failed to enable software MII access\n");
48b1be6a DH	199	return ret;
	200	}
	201
607740bc	202	int asix_set_hw_mii(struct usbnet *dev)
48b1be6a DH	203	{
	204	int ret;
	205	ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
	206	if (ret < 0)
60b86755	207	netdev_err(dev->net, "Failed to enable hardware MII access\n");
48b1be6a DH	208	return ret;
	209	}
	210
16626b0c	211	int asix_read_phy_addr(struct usbnet *dev, int internal)
48b1be6a	212	{
16626b0c	213	int offset = (internal ? 1 : 0);
51bf2976 AV	214	u8 buf[2];
51bf2976 AV	215	int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
48b1be6a	216
60b86755	217	netdev_dbg(dev->net, "asix_get_phy_addr()\n");
933a27d3	218
51bf2976	219	if (ret < 0) {
60b86755	220	netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
51bf2976	221	goto out;
48b1be6a	222	}
60b86755 JP	223	netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
60b86755 JP	224	((__le16 )buf));
16626b0c	225	ret = buf[offset];
51bf2976 AV	226
51bf2976 AV	227	out:
48b1be6a DH	228	return ret;
	229	}
	230
16626b0c CR	231	int asix_get_phy_addr(struct usbnet *dev)
	232	{
	233	/* return the address of the internal phy */
	234	return asix_read_phy_addr(dev, 1);
	235	}
	236
	237
607740bc	238	int asix_sw_reset(struct usbnet *dev, u8 flags)
48b1be6a DH	239	{
	240	int ret;
	241
	242	ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
	243	if (ret < 0)
60b86755	244	netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
933a27d3 DH	245
	246	return ret;
	247	}
48b1be6a	248
607740bc	249	u16 asix_read_rx_ctl(struct usbnet *dev)
933a27d3	250	{
51bf2976 AV	251	__le16 v;
51bf2976 AV	252	int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
933a27d3	253
51bf2976	254	if (ret < 0) {
60b86755	255	netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
51bf2976	256	goto out;
933a27d3	257	}
51bf2976 AV	258	ret = le16_to_cpu(v);
51bf2976 AV	259	out:
48b1be6a DH	260	return ret;
	261	}
	262
607740bc	263	int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
48b1be6a DH	264	{
	265	int ret;
	266
60b86755	267	netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
48b1be6a DH	268	ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
48b1be6a DH	269	if (ret < 0)
60b86755 JP	270	netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
60b86755 JP	271	mode, ret);
48b1be6a DH	272
	273	return ret;
	274	}
	275
607740bc	276	u16 asix_read_medium_status(struct usbnet *dev)
2e55cc72	277	{
51bf2976 AV	278	__le16 v;
51bf2976 AV	279	int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
2e55cc72	280
51bf2976	281	if (ret < 0) {
60b86755 JP	282	netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
60b86755 JP	283	ret);
83e1b918	284	return ret; /* TODO: callers not checking for error ret */
2e55cc72	285	}
83e1b918 GG	286
	287	return le16_to_cpu(v);
	288
2e55cc72 DB	289	}
2e55cc72 DB	290
607740bc	291	int asix_write_medium_mode(struct usbnet *dev, u16 mode)
2e55cc72	292	{
933a27d3	293	int ret;
2e55cc72	294
60b86755	295	netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
933a27d3 DH	296	ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
933a27d3 DH	297	if (ret < 0)
60b86755 JP	298	netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
60b86755 JP	299	mode, ret);
2e55cc72	300
933a27d3 DH	301	return ret;
933a27d3 DH	302	}
2e55cc72	303
607740bc	304	int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
933a27d3 DH	305	{
933a27d3 DH	306	int ret;
2e55cc72	307
60b86755	308	netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
933a27d3 DH	309	ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
933a27d3 DH	310	if (ret < 0)
60b86755 JP	311	netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
60b86755 JP	312	value, ret);
2e55cc72	313
933a27d3 DH	314	if (sleep)
	315	msleep(sleep);
	316
	317	return ret;
2e55cc72 DB	318	}
2e55cc72 DB	319
933a27d3 DH	320	/*
	321	* AX88772 & AX88178 have a 16-bit RX_CTL value
	322	*/
607740bc	323	void asix_set_multicast(struct net_device *net)
2e55cc72 DB	324	{
2e55cc72 DB	325	struct usbnet *dev = netdev_priv(net);
48b1be6a	326	struct asix_data data = (struct asix_data )&dev->data;
933a27d3	327	u16 rx_ctl = AX_DEFAULT_RX_CTL;
2e55cc72 DB	328
2e55cc72 DB	329	if (net->flags & IFF_PROMISC) {
933a27d3	330	rx_ctl \|= AX_RX_CTL_PRO;
8e95a202	331	} else if (net->flags & IFF_ALLMULTI \|\|
4cd24eaf	332	netdev_mc_count(net) > AX_MAX_MCAST) {
933a27d3	333	rx_ctl \|= AX_RX_CTL_AMALL;
4cd24eaf	334	} else if (netdev_mc_empty(net)) {
2e55cc72 DB	335	/* just broadcast and directed */
	336	} else {
	337	/* We use the 20 byte dev->data
	338	* for our 8 byte filter buffer
	339	* to avoid allocating memory that
	340	* is tricky to free later */
22bedad3	341	struct netdev_hw_addr *ha;
2e55cc72	342	u32 crc_bits;
2e55cc72 DB	343
	344	memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
	345
	346	/* Build the multicast hash filter. */
22bedad3 JP	347	netdev_for_each_mc_addr(ha, net) {
22bedad3 JP	348	crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
2e55cc72 DB	349	data->multi_filter[crc_bits >> 3] \|=
2e55cc72 DB	350	1 << (crc_bits & 7);
2e55cc72 DB	351	}
2e55cc72 DB	352
48b1be6a	353	asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
2e55cc72 DB	354	AX_MCAST_FILTER_SIZE, data->multi_filter);
2e55cc72 DB	355
933a27d3	356	rx_ctl \|= AX_RX_CTL_AM;
2e55cc72 DB	357	}
2e55cc72 DB	358
48b1be6a	359	asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
2e55cc72 DB	360	}
2e55cc72 DB	361
607740bc	362	int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
2e55cc72 DB	363	{
2e55cc72 DB	364	struct usbnet *dev = netdev_priv(netdev);
51bf2976	365	__le16 res;
2e55cc72	366
a9fc6338	367	mutex_lock(&dev->phy_mutex);
48b1be6a DH	368	asix_set_sw_mii(dev);
48b1be6a DH	369	asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
51bf2976	370	(__u16)loc, 2, &res);
48b1be6a	371	asix_set_hw_mii(dev);
a9fc6338	372	mutex_unlock(&dev->phy_mutex);
2e55cc72	373
60b86755 JP	374	netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
60b86755 JP	375	phy_id, loc, le16_to_cpu(res));
2e55cc72	376
51bf2976	377	return le16_to_cpu(res);
2e55cc72 DB	378	}
2e55cc72 DB	379
607740bc	380	void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
2e55cc72 DB	381	{
2e55cc72 DB	382	struct usbnet *dev = netdev_priv(netdev);
51bf2976	383	__le16 res = cpu_to_le16(val);
2e55cc72	384
60b86755 JP	385	netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
60b86755 JP	386	phy_id, loc, val);
a9fc6338	387	mutex_lock(&dev->phy_mutex);
48b1be6a	388	asix_set_sw_mii(dev);
51bf2976	389	asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
48b1be6a	390	asix_set_hw_mii(dev);
a9fc6338	391	mutex_unlock(&dev->phy_mutex);
2e55cc72 DB	392	}
2e55cc72 DB	393
607740bc	394	void asix_get_wol(struct net_device net, struct ethtool_wolinfo wolinfo)
2e55cc72 DB	395	{
	396	struct usbnet *dev = netdev_priv(net);
	397	u8 opt;
	398
48b1be6a	399	if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
2e55cc72 DB	400	wolinfo->supported = 0;
	401	wolinfo->wolopts = 0;
	402	return;
	403	}
	404	wolinfo->supported = WAKE_PHY \| WAKE_MAGIC;
	405	wolinfo->wolopts = 0;
f87ce5b2	406	if (opt & AX_MONITOR_LINK)
	407	wolinfo->wolopts \|= WAKE_PHY;
	408	if (opt & AX_MONITOR_MAGIC)
	409	wolinfo->wolopts \|= WAKE_MAGIC;
2e55cc72 DB	410	}
2e55cc72 DB	411
607740bc	412	int asix_set_wol(struct net_device net, struct ethtool_wolinfo wolinfo)
2e55cc72 DB	413	{
	414	struct usbnet *dev = netdev_priv(net);
	415	u8 opt = 0;
2e55cc72 DB	416
	417	if (wolinfo->wolopts & WAKE_PHY)
	418	opt \|= AX_MONITOR_LINK;
	419	if (wolinfo->wolopts & WAKE_MAGIC)
	420	opt \|= AX_MONITOR_MAGIC;
2e55cc72	421
48b1be6a	422	if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
51bf2976	423	opt, 0, 0, NULL) < 0)
2e55cc72 DB	424	return -EINVAL;
	425
	426	return 0;
	427	}
	428
607740bc	429	int asix_get_eeprom_len(struct net_device *net)
2e55cc72	430	{
ceb02c91	431	return AX_EEPROM_LEN;
2e55cc72 DB	432	}
2e55cc72 DB	433
607740bc CR	434	int asix_get_eeprom(struct net_device net, struct ethtool_eeprom eeprom,
607740bc CR	435	u8 *data)
2e55cc72 DB	436	{
2e55cc72 DB	437	struct usbnet *dev = netdev_priv(net);
ceb02c91 CR	438	u16 *eeprom_buff;
ceb02c91 CR	439	int first_word, last_word;
2e55cc72 DB	440	int i;
2e55cc72 DB	441
ceb02c91	442	if (eeprom->len == 0)
2e55cc72 DB	443	return -EINVAL;
	444
	445	eeprom->magic = AX_EEPROM_MAGIC;
	446
ceb02c91 CR	447	first_word = eeprom->offset >> 1;
	448	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
	449
	450	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
	451	GFP_KERNEL);
	452	if (!eeprom_buff)
	453	return -ENOMEM;
	454
2e55cc72	455	/* ax8817x returns 2 bytes from eeprom on read */
ceb02c91 CR	456	for (i = first_word; i <= last_word; i++) {
	457	if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
	458	&(eeprom_buff[i - first_word])) < 0) {
	459	kfree(eeprom_buff);
	460	return -EIO;
	461	}
2e55cc72	462	}
ceb02c91 CR	463
	464	memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
	465	kfree(eeprom_buff);
2e55cc72 DB	466	return 0;
	467	}
	468
cb7b24cd CR	469	int asix_set_eeprom(struct net_device net, struct ethtool_eeprom eeprom,
	470	u8 *data)
	471	{
	472	struct usbnet *dev = netdev_priv(net);
	473	u16 *eeprom_buff;
	474	int first_word, last_word;
	475	int i;
	476	int ret;
	477
	478	netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
	479	eeprom->len, eeprom->offset, eeprom->magic);
	480
	481	if (eeprom->len == 0)
	482	return -EINVAL;
	483
	484	if (eeprom->magic != AX_EEPROM_MAGIC)
	485	return -EINVAL;
	486
	487	first_word = eeprom->offset >> 1;
	488	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
	489
	490	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
	491	GFP_KERNEL);
	492	if (!eeprom_buff)
	493	return -ENOMEM;
	494
	495	/* align data to 16 bit boundaries, read the missing data from
	496	the EEPROM */
	497	if (eeprom->offset & 1) {
	498	ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
	499	&(eeprom_buff[0]));
	500	if (ret < 0) {
	501	netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
	502	goto free;
	503	}
	504	}
	505
	506	if ((eeprom->offset + eeprom->len) & 1) {
	507	ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
	508	&(eeprom_buff[last_word - first_word]));
	509	if (ret < 0) {
	510	netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
	511	goto free;
	512	}
	513	}
	514
	515	memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
	516
	517	/* write data to EEPROM */
	518	ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
	519	if (ret < 0) {
	520	netdev_err(net, "Failed to enable EEPROM write\n");
	521	goto free;
	522	}
	523	msleep(20);
	524
	525	for (i = first_word; i <= last_word; i++) {
	526	netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
	527	i, eeprom_buff[i - first_word]);
	528	ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
	529	eeprom_buff[i - first_word], 0, NULL);
	530	if (ret < 0) {
	531	netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
	532	i);
533	goto free;
534	}
535	msleep(20);
536	}
537
538	ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
539	if (ret < 0) {
540	netdev_err(net, "Failed to disable EEPROM write\n");
541	goto free;
542	}
543
544	ret = 0;
545	free:
546	kfree(eeprom_buff);
547	return ret;
548	}
549
607740bc	550	void asix_get_drvinfo(struct net_device net, struct ethtool_drvinfo info)
2e55cc72 DB	551	{
	552	/* Inherit standard device info */
	553	usbnet_get_drvinfo(net, info);
7826d43f JP	554	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
7826d43f JP	555	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
ceb02c91	556	info->eedump_len = AX_EEPROM_LEN;
2e55cc72 DB	557	}
2e55cc72 DB	558
607740bc	559	int asix_set_mac_address(struct net_device net, void p)
7f29a3ba JK	560	{
	561	struct usbnet *dev = netdev_priv(net);
	562	struct asix_data data = (struct asix_data )&dev->data;
	563	struct sockaddr *addr = p;
	564
	565	if (netif_running(net))
	566	return -EBUSY;
	567	if (!is_valid_ether_addr(addr->sa_data))
	568	return -EADDRNOTAVAIL;
	569
	570	memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
	571
	572	/* We use the 20 byte dev->data
	573	* for our 6 byte mac buffer
	574	* to avoid allocating memory that
	575	* is tricky to free later */
	576	memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
	577	asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
	578	data->mac_addr);
	579
	580	return 0;
	581	}