diff options
Diffstat (limited to 'drivers/net/usb/asix_common.c')
-rw-r--r-- | drivers/net/usb/asix_common.c | 781 |
1 files changed, 781 insertions, 0 deletions
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c new file mode 100644 index 0000000000..72ffc89b47 --- /dev/null +++ b/drivers/net/usb/asix_common.c @@ -0,0 +1,781 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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. + */ + +#include "asix.h" + +#define AX_HOST_EN_RETRIES 30 + +int __must_check asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, + u16 size, void *data, int in_pm) +{ + int ret; + int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); + + BUG_ON(!dev); + + if (!in_pm) + fn = usbnet_read_cmd; + else + fn = usbnet_read_cmd_nopm; + + ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, index, data, size); + + if (unlikely(ret < size)) { + ret = ret < 0 ? ret : -ENODATA; + + netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n", + index, ret); + } + + return ret; +} + +int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, + u16 size, void *data, int in_pm) +{ + int ret; + int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); + + BUG_ON(!dev); + + if (!in_pm) + fn = usbnet_write_cmd; + else + fn = usbnet_write_cmd_nopm; + + ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, index, data, size); + + if (unlikely(ret < 0)) + netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n", + index, ret); + + return ret; +} + +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); +} + +static int asix_set_sw_mii(struct usbnet *dev, int in_pm) +{ + int ret; + + ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm); + + if (ret < 0) + netdev_err(dev->net, "Failed to enable software MII access\n"); + return ret; +} + +static int asix_set_hw_mii(struct usbnet *dev, int in_pm) +{ + int ret; + + ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm); + if (ret < 0) + netdev_err(dev->net, "Failed to enable hardware MII access\n"); + return ret; +} + +static int asix_check_host_enable(struct usbnet *dev, int in_pm) +{ + int i, ret; + u8 smsr; + + for (i = 0; i < AX_HOST_EN_RETRIES; ++i) { + ret = asix_set_sw_mii(dev, in_pm); + if (ret == -ENODEV || ret == -ETIMEDOUT) + break; + usleep_range(1000, 1100); + ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, + 0, 0, 1, &smsr, in_pm); + if (ret == -ENODEV) + break; + else if (ret < 0) + continue; + else if (smsr & AX_HOST_EN) + break; + } + + return i >= AX_HOST_EN_RETRIES ? -ETIMEDOUT : ret; +} + +static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx) +{ + /* Reset the variables that have a lifetime outside of + * asix_rx_fixup_internal() so that future processing starts from a + * known set of initial conditions. + */ + + if (rx->ax_skb) { + /* Discard any incomplete Ethernet frame in the netdev buffer */ + kfree_skb(rx->ax_skb); + rx->ax_skb = NULL; + } + + /* Assume the Data header 32-bit word is at the start of the current + * or next URB socket buffer so reset all the state variables. + */ + rx->remaining = 0; + rx->split_head = false; + rx->header = 0; +} + +int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, + struct asix_rx_fixup_info *rx) +{ + int offset = 0; + u16 size; + + /* When an Ethernet frame spans multiple URB socket buffers, + * do a sanity test for the Data header synchronisation. + * Attempt to detect the situation of the previous socket buffer having + * been truncated or a socket buffer was missing. These situations + * cause a discontinuity in the data stream and therefore need to avoid + * appending bad data to the end of the current netdev socket buffer. + * Also avoid unnecessarily discarding a good current netdev socket + * buffer. + */ + if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) { + offset = ((rx->remaining + 1) & 0xfffe); + rx->header = get_unaligned_le32(skb->data + offset); + offset = 0; + + size = (u16)(rx->header & 0x7ff); + if (size != ((~rx->header >> 16) & 0x7ff)) { + netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n", + rx->remaining); + reset_asix_rx_fixup_info(rx); + } + } + + while (offset + sizeof(u16) <= skb->len) { + u16 copy_length; + + if (!rx->remaining) { + if (skb->len - offset == sizeof(u16)) { + rx->header = get_unaligned_le16( + skb->data + offset); + rx->split_head = true; + offset += sizeof(u16); + break; + } + + if (rx->split_head == true) { + rx->header |= (get_unaligned_le16( + skb->data + offset) << 16); + rx->split_head = false; + offset += sizeof(u16); + } else { + rx->header = get_unaligned_le32(skb->data + + offset); + offset += sizeof(u32); + } + + /* take frame length from Data header 32-bit word */ + size = (u16)(rx->header & 0x7ff); + if (size != ((~rx->header >> 16) & 0x7ff)) { + netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", + rx->header, offset); + reset_asix_rx_fixup_info(rx); + return 0; + } + if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { + netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n", + size); + reset_asix_rx_fixup_info(rx); + return 0; + } + + /* Sometimes may fail to get a netdev socket buffer but + * continue to process the URB socket buffer so that + * synchronisation of the Ethernet frame Data header + * word is maintained. + */ + rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); + + rx->remaining = size; + } + + if (rx->remaining > skb->len - offset) { + copy_length = skb->len - offset; + rx->remaining -= copy_length; + } else { + copy_length = rx->remaining; + rx->remaining = 0; + } + + if (rx->ax_skb) { + skb_put_data(rx->ax_skb, skb->data + offset, + copy_length); + if (!rx->remaining) { + usbnet_skb_return(dev, rx->ax_skb); + rx->ax_skb = NULL; + } + } + + offset += (copy_length + 1) & 0xfffe; + } + + if (skb->len != offset) { + netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n", + skb->len, offset); + reset_asix_rx_fixup_info(rx); + 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); +} + +void asix_rx_fixup_common_free(struct asix_common_private *dp) +{ + struct asix_rx_fixup_info *rx; + + if (!dp) + return; + + rx = &dp->rx_fixup_info; + + if (rx->ax_skb) { + kfree_skb(rx->ax_skb); + rx->ax_skb = NULL; + } +} + +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; + void *ptr; + + 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; + ptr = skb_push(skb, 4); + put_unaligned_le32(packet_len, ptr); + + if (padlen) { + put_unaligned_le32(padbytes, skb_tail_pointer(skb)); + skb_put(skb, sizeof(padbytes)); + } + + usbnet_set_skb_tx_stats(skb, 1, 0); + return skb; +} + +int asix_read_phy_addr(struct usbnet *dev, bool internal) +{ + int ret, offset; + u8 buf[2]; + + ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); + if (ret < 0) + goto error; + + if (ret < 2) { + ret = -EIO; + goto error; + } + + offset = (internal ? 1 : 0); + ret = buf[offset]; + + netdev_dbg(dev->net, "%s PHY address 0x%x\n", + internal ? "internal" : "external", ret); + + return ret; + +error: + netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret); + + return ret; +} + +int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) +{ + int ret; + + ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); + 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, int in_pm) +{ + __le16 v; + int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); + + 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 in_pm) +{ + 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, in_pm); + 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, int in_pm) +{ + __le16 v; + int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, + 0, 0, 2, &v, in_pm); + + 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 in_pm) +{ + 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, in_pm); + if (ret < 0) + netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", + mode, ret); + + return ret; +} + +/* set MAC link settings according to information from phylib */ +void asix_adjust_link(struct net_device *netdev) +{ + struct phy_device *phydev = netdev->phydev; + struct usbnet *dev = netdev_priv(netdev); + u16 mode = 0; + + if (phydev->link) { + mode = AX88772_MEDIUM_DEFAULT; + + if (phydev->duplex == DUPLEX_HALF) + mode &= ~AX_MEDIUM_FD; + + if (phydev->speed != SPEED_100) + mode &= ~AX_MEDIUM_PS; + } + + asix_write_medium_mode(dev, mode, 0); + phy_print_status(phydev); + usbnet_link_change(dev, phydev->link, 0); +} + +int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) +{ + 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, in_pm); + 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); +} + +static int __asix_mdio_read(struct net_device *netdev, int phy_id, int loc, + bool in_pm) +{ + struct usbnet *dev = netdev_priv(netdev); + __le16 res; + int ret; + + mutex_lock(&dev->phy_mutex); + + ret = asix_check_host_enable(dev, in_pm); + if (ret == -ENODEV || ret == -ETIMEDOUT) { + mutex_unlock(&dev->phy_mutex); + return ret; + } + + ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, + &res, in_pm); + if (ret < 0) + goto out; + + ret = asix_set_hw_mii(dev, in_pm); +out: + 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 ret < 0 ? ret : le16_to_cpu(res); +} + +int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) +{ + return __asix_mdio_read(netdev, phy_id, loc, false); +} + +static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc, + int val, bool in_pm) +{ + struct usbnet *dev = netdev_priv(netdev); + __le16 res = cpu_to_le16(val); + int ret; + + 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); + + ret = asix_check_host_enable(dev, in_pm); + if (ret == -ENODEV) + goto out; + + ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, + &res, in_pm); + if (ret < 0) + goto out; + + ret = asix_set_hw_mii(dev, in_pm); +out: + mutex_unlock(&dev->phy_mutex); + + return ret < 0 ? ret : 0; +} + +void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) +{ + __asix_mdio_write(netdev, phy_id, loc, val, false); +} + +/* MDIO read and write wrappers for phylib */ +int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum) +{ + struct usbnet *priv = bus->priv; + + return __asix_mdio_read(priv->net, phy_id, regnum, false); +} + +int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val) +{ + struct usbnet *priv = bus->priv; + + return __asix_mdio_write(priv->net, phy_id, regnum, val, false); +} + +int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) +{ + return __asix_mdio_read(netdev, phy_id, loc, true); +} + +void +asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val) +{ + __asix_mdio_write(netdev, phy_id, loc, val, true); +} + +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) < 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 | WAKE_MAGIC)) + return -EINVAL; + + 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) < 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_array(last_word - first_word + 1, sizeof(u16), + 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) < 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_array(last_word - first_word + 1, sizeof(u16), + 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], 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], 0); + 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, 0); + 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, 0); + 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, 0); + 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); + strscpy(info->driver, DRIVER_NAME, sizeof(info->driver)); + strscpy(info->version, DRIVER_VERSION, sizeof(info->version)); +} + +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; + + eth_hw_addr_set(net, addr->sa_data); + + /* 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; +} |