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