[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;

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