[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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#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;

	while (offset + sizeof(u16) <= skb->len) {
		u16 remaining = 0;
		unsigned char *data;

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

			/* get the packet length */
			rx->size = (u16) (rx->header & 0x7ff);
			if (rx->size != ((~rx->header >> 16) & 0x7ff)) {
				netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
					   rx->header, offset);
				rx->size = 0;
				return 0;
			}
			rx->ax_skb = netdev_alloc_skb_ip_align(dev->net,
							       rx->size);
			if (!rx->ax_skb)
				return 0;
		}

		if (rx->size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
			netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
				   rx->size);
			kfree_skb(rx->ax_skb);
			rx->ax_skb = NULL;
			rx->size = 0U;

			return 0;
		}

		if (rx->size > skb->len - offset) {
			remaining = rx->size - (skb->len - offset);
			rx->size = skb->len - offset;
		}

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

		offset += (rx->size + 1) & 0xfffe;
		rx->size = remaining;
	}

	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));
	}
	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
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
607740bc CR	23	#include "asix.h"
	24
	25	int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
	26	u16 size, void *data)
2e55cc72	27	{
0bc69efb ML	28	int ret;
	29	ret = usbnet_read_cmd(dev, cmd,
	30	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	31	value, index, data, size);
	32
	33	if (ret != size && ret >= 0)
	34	return -EINVAL;
	35	return ret;
2e55cc72 DB	36	}
2e55cc72 DB	37
607740bc CR	38	int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
607740bc CR	39	u16 size, void *data)
2e55cc72	40	{
0bc69efb ML	41	return usbnet_write_cmd(dev, cmd,
	42	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	43	value, index, data, size);
2e55cc72 DB	44	}
2e55cc72 DB	45
607740bc CR	46	void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
607740bc CR	47	u16 size, void *data)
933a27d3	48	{
0bc69efb ML	49	usbnet_write_cmd_async(dev, cmd,
	50	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	51	value, index, data, size);
933a27d3 DH	52	}
933a27d3 DH	53
8b5b6f54 LS	54	int asix_rx_fixup_internal(struct usbnet dev, struct sk_buff skb,
8b5b6f54 LS	55	struct asix_rx_fixup_info *rx)
933a27d3	56	{
a9e0aca4	57	int offset = 0;
933a27d3	58
8b5b6f54 LS	59	while (offset + sizeof(u16) <= skb->len) {
	60	u16 remaining = 0;
	61	unsigned char *data;
933a27d3	62
8b5b6f54 LS	63	if (!rx->size) {
	64	if ((skb->len - offset == sizeof(u16)) \|\|
	65	rx->split_head) {
	66	if(!rx->split_head) {
	67	rx->header = get_unaligned_le16(
	68	skb->data + offset);
	69	rx->split_head = true;
	70	offset += sizeof(u16);
	71	break;
	72	} else {
	73	rx->header \|= (get_unaligned_le16(
	74	skb->data + offset)
	75	<< 16);
	76	rx->split_head = false;
	77	offset += sizeof(u16);
	78	}
	79	} else {
	80	rx->header = get_unaligned_le32(skb->data +
	81	offset);
	82	offset += sizeof(u32);
	83	}
bc466e67	84
8b5b6f54 LS	85	/* get the packet length */
	86	rx->size = (u16) (rx->header & 0x7ff);
	87	if (rx->size != ((~rx->header >> 16) & 0x7ff)) {
	88	netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
	89	rx->header, offset);
	90	rx->size = 0;
	91	return 0;
	92	}
	93	rx->ax_skb = netdev_alloc_skb_ip_align(dev->net,
	94	rx->size);
	95	if (!rx->ax_skb)
	96	return 0;
3f78d1f2 NJ	97	}
3f78d1f2 NJ	98
8b5b6f54	99	if (rx->size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
60b86755	100	netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
8b5b6f54 LS	101	rx->size);
8b5b6f54 LS	102	kfree_skb(rx->ax_skb);
c5060cec	103	rx->ax_skb = NULL;
	104	rx->size = 0U;
	105
933a27d3 DH	106	return 0;
933a27d3 DH	107	}
933a27d3	108
8b5b6f54 LS	109	if (rx->size > skb->len - offset) {
	110	remaining = rx->size - (skb->len - offset);
	111	rx->size = skb->len - offset;
	112	}
933a27d3	113
8b5b6f54 LS	114	data = skb_put(rx->ax_skb, rx->size);
	115	memcpy(data, skb->data + offset, rx->size);
	116	if (!remaining)
	117	usbnet_skb_return(dev, rx->ax_skb);
	118
	119	offset += (rx->size + 1) & 0xfffe;
	120	rx->size = remaining;
933a27d3 DH	121	}
933a27d3 DH	122
a9e0aca4	123	if (skb->len != offset) {
8b5b6f54 LS	124	netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
8b5b6f54 LS	125	skb->len, offset);
933a27d3 DH	126	return 0;
933a27d3 DH	127	}
8b5b6f54	128
933a27d3 DH	129	return 1;
	130	}
	131
8b5b6f54 LS	132	int asix_rx_fixup_common(struct usbnet dev, struct sk_buff skb)
	133	{
	134	struct asix_common_private *dp = dev->driver_priv;
	135	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
	136
	137	return asix_rx_fixup_internal(dev, skb, rx);
	138	}
	139
607740bc CR	140	struct sk_buff asix_tx_fixup(struct usbnet dev, struct sk_buff *skb,
607740bc CR	141	gfp_t flags)
933a27d3 DH	142	{
	143	int padlen;
	144	int headroom = skb_headroom(skb);
	145	int tailroom = skb_tailroom(skb);
	146	u32 packet_len;
	147	u32 padbytes = 0xffff0000;
	148
2a580949	149	padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
933a27d3	150
95162d65 ED	151	/* We need to push 4 bytes in front of frame (packet_len)
	152	* and maybe add 4 bytes after the end (if padlen is 4)
	153	*
	154	* Avoid skb_copy_expand() expensive call, using following rules :
	155	* - We are allowed to push 4 bytes in headroom if skb_header_cloned()
	156	* is false (and if we have 4 bytes of headroom)
	157	* - We are allowed to put 4 bytes at tail if skb_cloned()
	158	* is false (and if we have 4 bytes of tailroom)
	159	*
	160	* TCP packets for example are cloned, but skb_header_release()
	161	* was called in tcp stack, allowing us to use headroom for our needs.
	162	*/
	163	if (!skb_header_cloned(skb) &&
	164	!(padlen && skb_cloned(skb)) &&
	165	headroom + tailroom >= 4 + padlen) {
	166	/* following should not happen, but better be safe */
	167	if (headroom < 4 \|\|
	168	tailroom < padlen) {
933a27d3	169	skb->data = memmove(skb->head + 4, skb->data, skb->len);
27a884dc	170	skb_set_tail_pointer(skb, skb->len);
933a27d3 DH	171	}
	172	} else {
	173	struct sk_buff *skb2;
95162d65	174
933a27d3 DH	175	skb2 = skb_copy_expand(skb, 4, padlen, flags);
	176	dev_kfree_skb_any(skb);
	177	skb = skb2;
	178	if (!skb)
	179	return NULL;
	180	}
	181
95162d65	182	packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
933a27d3	183	skb_push(skb, 4);
57e4f041	184	cpu_to_le32s(&packet_len);
27d7ff46	185	skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
933a27d3	186
2a580949	187	if (padlen) {
57e4f041	188	cpu_to_le32s(&padbytes);
27a884dc	189	memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
933a27d3 DH	190	skb_put(skb, sizeof(padbytes));
	191	}
	192	return skb;
	193	}
	194
607740bc	195	int asix_set_sw_mii(struct usbnet *dev)
48b1be6a DH	196	{
	197	int ret;
	198	ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
	199	if (ret < 0)
60b86755	200	netdev_err(dev->net, "Failed to enable software MII access\n");
48b1be6a DH	201	return ret;
	202	}
	203
607740bc	204	int asix_set_hw_mii(struct usbnet *dev)
48b1be6a DH	205	{
	206	int ret;
	207	ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
	208	if (ret < 0)
60b86755	209	netdev_err(dev->net, "Failed to enable hardware MII access\n");
48b1be6a DH	210	return ret;
	211	}
	212
16626b0c	213	int asix_read_phy_addr(struct usbnet *dev, int internal)
48b1be6a	214	{
16626b0c	215	int offset = (internal ? 1 : 0);
51bf2976 AV	216	u8 buf[2];
51bf2976 AV	217	int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
48b1be6a	218
60b86755	219	netdev_dbg(dev->net, "asix_get_phy_addr()\n");
933a27d3	220
51bf2976	221	if (ret < 0) {
60b86755	222	netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
51bf2976	223	goto out;
48b1be6a	224	}
60b86755 JP	225	netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
60b86755 JP	226	((__le16 )buf));
16626b0c	227	ret = buf[offset];
51bf2976 AV	228
51bf2976 AV	229	out:
48b1be6a DH	230	return ret;
	231	}
	232
16626b0c CR	233	int asix_get_phy_addr(struct usbnet *dev)
	234	{
	235	/* return the address of the internal phy */
	236	return asix_read_phy_addr(dev, 1);
	237	}
	238
	239
607740bc	240	int asix_sw_reset(struct usbnet *dev, u8 flags)
48b1be6a DH	241	{
	242	int ret;
	243
	244	ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
	245	if (ret < 0)
60b86755	246	netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
933a27d3 DH	247
	248	return ret;
	249	}
48b1be6a	250
607740bc	251	u16 asix_read_rx_ctl(struct usbnet *dev)
933a27d3	252	{
51bf2976 AV	253	__le16 v;
51bf2976 AV	254	int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
933a27d3	255
51bf2976	256	if (ret < 0) {
60b86755	257	netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
51bf2976	258	goto out;
933a27d3	259	}
51bf2976 AV	260	ret = le16_to_cpu(v);
51bf2976 AV	261	out:
48b1be6a DH	262	return ret;
	263	}
	264
607740bc	265	int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
48b1be6a DH	266	{
	267	int ret;
	268
60b86755	269	netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
48b1be6a DH	270	ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
48b1be6a DH	271	if (ret < 0)
60b86755 JP	272	netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
60b86755 JP	273	mode, ret);
48b1be6a DH	274
	275	return ret;
	276	}
	277
607740bc	278	u16 asix_read_medium_status(struct usbnet *dev)
2e55cc72	279	{
51bf2976 AV	280	__le16 v;
51bf2976 AV	281	int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
2e55cc72	282
51bf2976	283	if (ret < 0) {
60b86755 JP	284	netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
60b86755 JP	285	ret);
83e1b918	286	return ret; /* TODO: callers not checking for error ret */
2e55cc72	287	}
83e1b918 GG	288
	289	return le16_to_cpu(v);
	290
2e55cc72 DB	291	}
2e55cc72 DB	292
607740bc	293	int asix_write_medium_mode(struct usbnet *dev, u16 mode)
2e55cc72	294	{
933a27d3	295	int ret;
2e55cc72	296
60b86755	297	netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
933a27d3 DH	298	ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
933a27d3 DH	299	if (ret < 0)
60b86755 JP	300	netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
60b86755 JP	301	mode, ret);
2e55cc72	302
933a27d3 DH	303	return ret;
933a27d3 DH	304	}
2e55cc72	305
607740bc	306	int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
933a27d3 DH	307	{
933a27d3 DH	308	int ret;
2e55cc72	309
60b86755	310	netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
933a27d3 DH	311	ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
933a27d3 DH	312	if (ret < 0)
60b86755 JP	313	netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
60b86755 JP	314	value, ret);
2e55cc72	315
933a27d3 DH	316	if (sleep)
	317	msleep(sleep);
	318
	319	return ret;
2e55cc72 DB	320	}
2e55cc72 DB	321
933a27d3 DH	322	/*
	323	* AX88772 & AX88178 have a 16-bit RX_CTL value
	324	*/
607740bc	325	void asix_set_multicast(struct net_device *net)
2e55cc72 DB	326	{
2e55cc72 DB	327	struct usbnet *dev = netdev_priv(net);
48b1be6a	328	struct asix_data data = (struct asix_data )&dev->data;
933a27d3	329	u16 rx_ctl = AX_DEFAULT_RX_CTL;
2e55cc72 DB	330
2e55cc72 DB	331	if (net->flags & IFF_PROMISC) {
933a27d3	332	rx_ctl \|= AX_RX_CTL_PRO;
8e95a202	333	} else if (net->flags & IFF_ALLMULTI \|\|
4cd24eaf	334	netdev_mc_count(net) > AX_MAX_MCAST) {
933a27d3	335	rx_ctl \|= AX_RX_CTL_AMALL;
4cd24eaf	336	} else if (netdev_mc_empty(net)) {
2e55cc72 DB	337	/* just broadcast and directed */
	338	} else {
	339	/* We use the 20 byte dev->data
	340	* for our 8 byte filter buffer
	341	* to avoid allocating memory that
	342	* is tricky to free later */
22bedad3	343	struct netdev_hw_addr *ha;
2e55cc72	344	u32 crc_bits;
2e55cc72 DB	345
	346	memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
	347
	348	/* Build the multicast hash filter. */
22bedad3 JP	349	netdev_for_each_mc_addr(ha, net) {
22bedad3 JP	350	crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
2e55cc72 DB	351	data->multi_filter[crc_bits >> 3] \|=
2e55cc72 DB	352	1 << (crc_bits & 7);
2e55cc72 DB	353	}
2e55cc72 DB	354
48b1be6a	355	asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
2e55cc72 DB	356	AX_MCAST_FILTER_SIZE, data->multi_filter);
2e55cc72 DB	357
933a27d3	358	rx_ctl \|= AX_RX_CTL_AM;
2e55cc72 DB	359	}
2e55cc72 DB	360
48b1be6a	361	asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
2e55cc72 DB	362	}
2e55cc72 DB	363
607740bc	364	int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
2e55cc72 DB	365	{
2e55cc72 DB	366	struct usbnet *dev = netdev_priv(netdev);
51bf2976	367	__le16 res;
2e55cc72	368
a9fc6338	369	mutex_lock(&dev->phy_mutex);
48b1be6a DH	370	asix_set_sw_mii(dev);
48b1be6a DH	371	asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
51bf2976	372	(__u16)loc, 2, &res);
48b1be6a	373	asix_set_hw_mii(dev);
a9fc6338	374	mutex_unlock(&dev->phy_mutex);
2e55cc72	375
60b86755 JP	376	netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
60b86755 JP	377	phy_id, loc, le16_to_cpu(res));
2e55cc72	378
51bf2976	379	return le16_to_cpu(res);
2e55cc72 DB	380	}
2e55cc72 DB	381
607740bc	382	void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
2e55cc72 DB	383	{
2e55cc72 DB	384	struct usbnet *dev = netdev_priv(netdev);
51bf2976	385	__le16 res = cpu_to_le16(val);
2e55cc72	386
60b86755 JP	387	netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
60b86755 JP	388	phy_id, loc, val);
a9fc6338	389	mutex_lock(&dev->phy_mutex);
48b1be6a	390	asix_set_sw_mii(dev);
51bf2976	391	asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
48b1be6a	392	asix_set_hw_mii(dev);
a9fc6338	393	mutex_unlock(&dev->phy_mutex);
2e55cc72 DB	394	}
2e55cc72 DB	395
607740bc	396	void asix_get_wol(struct net_device net, struct ethtool_wolinfo wolinfo)
2e55cc72 DB	397	{
	398	struct usbnet *dev = netdev_priv(net);
	399	u8 opt;
	400
48b1be6a	401	if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
2e55cc72 DB	402	wolinfo->supported = 0;
	403	wolinfo->wolopts = 0;
	404	return;
	405	}
	406	wolinfo->supported = WAKE_PHY \| WAKE_MAGIC;
	407	wolinfo->wolopts = 0;
f87ce5b2	408	if (opt & AX_MONITOR_LINK)
	409	wolinfo->wolopts \|= WAKE_PHY;
	410	if (opt & AX_MONITOR_MAGIC)
	411	wolinfo->wolopts \|= WAKE_MAGIC;
2e55cc72 DB	412	}
2e55cc72 DB	413
607740bc	414	int asix_set_wol(struct net_device net, struct ethtool_wolinfo wolinfo)
2e55cc72 DB	415	{
	416	struct usbnet *dev = netdev_priv(net);
	417	u8 opt = 0;
2e55cc72 DB	418
	419	if (wolinfo->wolopts & WAKE_PHY)
	420	opt \|= AX_MONITOR_LINK;
	421	if (wolinfo->wolopts & WAKE_MAGIC)
	422	opt \|= AX_MONITOR_MAGIC;
2e55cc72	423
48b1be6a	424	if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
51bf2976	425	opt, 0, 0, NULL) < 0)
2e55cc72 DB	426	return -EINVAL;
	427
	428	return 0;
	429	}
	430
607740bc	431	int asix_get_eeprom_len(struct net_device *net)
2e55cc72	432	{
ceb02c91	433	return AX_EEPROM_LEN;
2e55cc72 DB	434	}
2e55cc72 DB	435
607740bc CR	436	int asix_get_eeprom(struct net_device net, struct ethtool_eeprom eeprom,
607740bc CR	437	u8 *data)
2e55cc72 DB	438	{
2e55cc72 DB	439	struct usbnet *dev = netdev_priv(net);
ceb02c91 CR	440	u16 *eeprom_buff;
ceb02c91 CR	441	int first_word, last_word;
2e55cc72 DB	442	int i;
2e55cc72 DB	443
ceb02c91	444	if (eeprom->len == 0)
2e55cc72 DB	445	return -EINVAL;
	446
	447	eeprom->magic = AX_EEPROM_MAGIC;
	448
ceb02c91 CR	449	first_word = eeprom->offset >> 1;
	450	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
	451
	452	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
	453	GFP_KERNEL);
	454	if (!eeprom_buff)
	455	return -ENOMEM;
	456
2e55cc72	457	/* ax8817x returns 2 bytes from eeprom on read */
ceb02c91 CR	458	for (i = first_word; i <= last_word; i++) {
	459	if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
	460	&(eeprom_buff[i - first_word])) < 0) {
	461	kfree(eeprom_buff);
	462	return -EIO;
	463	}
2e55cc72	464	}
ceb02c91 CR	465
	466	memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
	467	kfree(eeprom_buff);
2e55cc72 DB	468	return 0;
	469	}
	470
cb7b24cd CR	471	int asix_set_eeprom(struct net_device net, struct ethtool_eeprom eeprom,
	472	u8 *data)
	473	{
	474	struct usbnet *dev = netdev_priv(net);
	475	u16 *eeprom_buff;
	476	int first_word, last_word;
	477	int i;
	478	int ret;
	479
	480	netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
	481	eeprom->len, eeprom->offset, eeprom->magic);
	482
	483	if (eeprom->len == 0)
	484	return -EINVAL;
	485
	486	if (eeprom->magic != AX_EEPROM_MAGIC)
	487	return -EINVAL;
	488
	489	first_word = eeprom->offset >> 1;
	490	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
	491
	492	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
	493	GFP_KERNEL);
	494	if (!eeprom_buff)
	495	return -ENOMEM;
	496
	497	/* align data to 16 bit boundaries, read the missing data from
	498	the EEPROM */
	499	if (eeprom->offset & 1) {
	500	ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
	501	&(eeprom_buff[0]));
	502	if (ret < 0) {
	503	netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
	504	goto free;
	505	}
	506	}
	507
	508	if ((eeprom->offset + eeprom->len) & 1) {
	509	ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
	510	&(eeprom_buff[last_word - first_word]));
	511	if (ret < 0) {
	512	netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
	513	goto free;
	514	}
	515	}
	516
	517	memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
	518
	519	/* write data to EEPROM */
	520	ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
	521	if (ret < 0) {
	522	netdev_err(net, "Failed to enable EEPROM write\n");
	523	goto free;
	524	}
	525	msleep(20);
	526
	527	for (i = first_word; i <= last_word; i++) {
	528	netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
	529	i, eeprom_buff[i - first_word]);
	530	ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
	531	eeprom_buff[i - first_word], 0, NULL);
	532	if (ret < 0) {
	533	netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
	534	i);
535	goto free;
536	}
537	msleep(20);
538	}
539
540	ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
541	if (ret < 0) {
542	netdev_err(net, "Failed to disable EEPROM write\n");
543	goto free;
544	}
545
546	ret = 0;
547	free:
548	kfree(eeprom_buff);
549	return ret;
550	}
551
607740bc	552	void asix_get_drvinfo(struct net_device net, struct ethtool_drvinfo info)
2e55cc72 DB	553	{
	554	/* Inherit standard device info */
	555	usbnet_get_drvinfo(net, info);
7826d43f JP	556	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
7826d43f JP	557	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
ceb02c91	558	info->eedump_len = AX_EEPROM_LEN;
2e55cc72 DB	559	}
2e55cc72 DB	560
607740bc	561	int asix_set_mac_address(struct net_device net, void p)
7f29a3ba JK	562	{
	563	struct usbnet *dev = netdev_priv(net);
	564	struct asix_data data = (struct asix_data )&dev->data;
	565	struct sockaddr *addr = p;
	566
	567	if (netif_running(net))
	568	return -EBUSY;
	569	if (!is_valid_ether_addr(addr->sa_data))
	570	return -EADDRNOTAVAIL;
	571
	572	memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
	573
	574	/* We use the 20 byte dev->data
	575	* for our 6 byte mac buffer
	576	* to avoid allocating memory that
	577	* is tricky to free later */
	578	memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
	579	asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
	580	data->mac_addr);
	581
	582	return 0;
	583	}