+static int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+ u8 *head;
+ u32 header;
+ char *packet;
+ struct sk_buff *ax_skb;
+ u16 size;
+
+ head = (u8 *) skb->data;
+ memcpy(&header, head, sizeof(header));
+ le32_to_cpus(&header);
+ packet = head + sizeof(header);
+
+ skb_pull(skb, 4);
+
+ while (skb->len > 0) {
+ if ((short)(header & 0x0000ffff) !=
+ ~((short)((header & 0xffff0000) >> 16))) {
+ deverr(dev,"asix_rx_fixup() Bad Header Length");
+ }
+ /* get the packet length */
+ size = (u16) (header & 0x0000ffff);
+
+ if ((skb->len) - ((size + 1) & 0xfffe) == 0)
+ return 2;
+ if (size > ETH_FRAME_LEN) {
+ deverr(dev,"asix_rx_fixup() Bad RX Length %d", size);
+ return 0;
+ }
+ ax_skb = skb_clone(skb, GFP_ATOMIC);
+ if (ax_skb) {
+ ax_skb->len = size;
+ ax_skb->data = packet;
+ ax_skb->tail = packet + size;
+ usbnet_skb_return(dev, ax_skb);
+ } else {
+ return 0;
+ }
+
+ skb_pull(skb, (size + 1) & 0xfffe);
+
+ if (skb->len == 0)
+ break;
+
+ head = (u8 *) skb->data;
+ memcpy(&header, head, sizeof(header));
+ le32_to_cpus(&header);
+ packet = head + sizeof(header);
+ skb_pull(skb, 4);
+ }
+
+ if (skb->len < 0) {
+ deverr(dev,"asix_rx_fixup() Bad SKB Length %d", skb->len);
+ return 0;
+ }
+ return 1;
+}
+
+static 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) % 512) ? 0 : 4;
+
+ if ((!skb_cloned(skb))
+ && ((headroom + tailroom) >= (4 + padlen))) {
+ if ((headroom < 4) || (tailroom < padlen)) {
+ skb->data = memmove(skb->head + 4, skb->data, skb->len);
+ skb->tail = skb->data + 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;
+ }
+
+ skb_push(skb, 4);
+ packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
+ memcpy(skb->data, &packet_len, sizeof(packet_len));
+
+ if ((skb->len % 512) == 0) {
+ memcpy( skb->tail, &padbytes, sizeof(padbytes));
+ skb_put(skb, sizeof(padbytes));
+ }
+ return skb;
+}
+
+static void asix_status(struct usbnet *dev, struct urb *urb)
+{
+ struct ax88172_int_data *event;
+ int link;
+
+ if (urb->actual_length < 8)
+ return;
+
+ event = urb->transfer_buffer;
+ link = event->link & 0x01;
+ if (netif_carrier_ok(dev->net) != link) {
+ if (link) {
+ netif_carrier_on(dev->net);
+ usbnet_defer_kevent (dev, EVENT_LINK_RESET );
+ } else
+ netif_carrier_off(dev->net);
+ devdbg(dev, "Link Status is: %d", link);
+ }
+}
+
+static inline 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)
+ deverr(dev, "Failed to enable software MII access");
+ return ret;
+}
+
+static inline 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)
+ deverr(dev, "Failed to enable hardware MII access");
+ return ret;
+}
+
+static inline int asix_get_phy_addr(struct usbnet *dev)
+{
+ int ret = 0;
+ void *buf;
+
+ devdbg(dev, "asix_get_phy_addr()");
+
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ goto out1;
+
+ if ((ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID,
+ 0, 0, 2, buf)) < 2) {
+ deverr(dev, "Error reading PHYID register: %02x", ret);
+ goto out2;
+ }
+ devdbg(dev, "asix_get_phy_addr() returning 0x%04x", *((u16 *)buf));
+ ret = *((u8 *)buf + 1);
+out2:
+ kfree(buf);
+out1:
+ return ret;
+}
+
+static 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)
+ deverr(dev,"Failed to send software reset: %02x", ret);
+
+ return ret;
+}
+
+static u16 asix_read_rx_ctl(struct usbnet *dev)
+{
+ u16 ret = 0;
+ void *buf;
+
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ goto out1;
+
+ if ((ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL,
+ 0, 0, 2, buf)) < 2) {
+ deverr(dev, "Error reading RX_CTL register: %02x", ret);
+ goto out2;
+ }
+ ret = le16_to_cpu(*((u16 *)buf));
+out2:
+ kfree(buf);
+out1:
+ return ret;
+}
+
+static int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
+{
+ int ret;
+
+ devdbg(dev,"asix_write_rx_ctl() - mode = 0x%04x", mode);
+ ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
+ if (ret < 0)
+ deverr(dev, "Failed to write RX_CTL mode to 0x%04x: %02x",
+ mode, ret);
+
+ return ret;
+}
+
+static u16 asix_read_medium_status(struct usbnet *dev)
+{
+ u16 ret = 0;
+ void *buf;
+
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ goto out1;
+
+ if ((ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS,
+ 0, 0, 2, buf)) < 2) {
+ deverr(dev, "Error reading Medium Status register: %02x", ret);
+ goto out2;
+ }
+ ret = le16_to_cpu(*((u16 *)buf));
+out2:
+ kfree(buf);
+out1:
+ return ret;
+}
+
+static int asix_write_medium_mode(struct usbnet *dev, u16 mode)
+{
+ int ret;
+
+ devdbg(dev,"asix_write_medium_mode() - mode = 0x%04x", mode);
+ ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
+ if (ret < 0)
+ deverr(dev, "Failed to write Medium Mode mode to 0x%04x: %02x",
+ mode, ret);
+
+ return ret;
+}
+
+static int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
+{
+ int ret;
+
+ devdbg(dev,"asix_write_gpio() - value = 0x%04x", value);
+ ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
+ if (ret < 0)
+ deverr(dev, "Failed to write GPIO value 0x%04x: %02x",
+ value, ret);
+
+ if (sleep)
+ msleep(sleep);
+
+ return ret;
+}
+
+/*
+ * AX88772 & AX88178 have a 16-bit RX_CTL value
+ */
+static void asix_set_multicast(struct net_device *net)