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Diffstat (limited to 'drivers/net/usb/asix_common.c')
-rw-r--r--drivers/net/usb/asix_common.c763
1 files changed, 763 insertions, 0 deletions
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
new file mode 100644
index 000000000..7bc6e8f85
--- /dev/null
+++ b/drivers/net/usb/asix_common.c
@@ -0,0 +1,763 @@
+// 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"
+
+int 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 < 0))
+ 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 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_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;
+}
+
+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;
+}
+
+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, 0);
+
+ netdev_dbg(dev->net, "asix_get_phy_addr()\n");
+
+ if (ret < 2) {
+ 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 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;
+}
+
+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);
+}
+
+int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
+{
+ struct usbnet *dev = netdev_priv(netdev);
+ __le16 res;
+ u8 smsr;
+ int i = 0;
+ int ret;
+
+ mutex_lock(&dev->phy_mutex);
+ do {
+ ret = asix_set_sw_mii(dev, 0);
+ if (ret == -ENODEV || ret == -ETIMEDOUT)
+ break;
+ usleep_range(1000, 1100);
+ ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
+ 0, 0, 1, &smsr, 0);
+ } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
+ if (ret == -ENODEV || ret == -ETIMEDOUT) {
+ mutex_unlock(&dev->phy_mutex);
+ return ret;
+ }
+
+ asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
+ (__u16)loc, 2, &res, 0);
+ asix_set_hw_mii(dev, 0);
+ 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);
+ u8 smsr;
+ int i = 0;
+ 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);
+ do {
+ ret = asix_set_sw_mii(dev, 0);
+ if (ret == -ENODEV)
+ break;
+ usleep_range(1000, 1100);
+ ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
+ 0, 0, 1, &smsr, 0);
+ } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
+ if (ret == -ENODEV) {
+ mutex_unlock(&dev->phy_mutex);
+ return;
+ }
+
+ asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
+ (__u16)loc, 2, &res, 0);
+ asix_set_hw_mii(dev, 0);
+ mutex_unlock(&dev->phy_mutex);
+}
+
+int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc)
+{
+ struct usbnet *dev = netdev_priv(netdev);
+ __le16 res;
+ u8 smsr;
+ int i = 0;
+ int ret;
+
+ mutex_lock(&dev->phy_mutex);
+ do {
+ ret = asix_set_sw_mii(dev, 1);
+ if (ret == -ENODEV || ret == -ETIMEDOUT)
+ break;
+ usleep_range(1000, 1100);
+ ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
+ 0, 0, 1, &smsr, 1);
+ } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
+ if (ret == -ENODEV || ret == -ETIMEDOUT) {
+ mutex_unlock(&dev->phy_mutex);
+ return ret;
+ }
+
+ asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
+ (__u16)loc, 2, &res, 1);
+ asix_set_hw_mii(dev, 1);
+ mutex_unlock(&dev->phy_mutex);
+
+ netdev_dbg(dev->net, "asix_mdio_read_nopm() 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_nopm(struct net_device *netdev, int phy_id, int loc, int val)
+{
+ struct usbnet *dev = netdev_priv(netdev);
+ __le16 res = cpu_to_le16(val);
+ u8 smsr;
+ int i = 0;
+ 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);
+ do {
+ ret = asix_set_sw_mii(dev, 1);
+ if (ret == -ENODEV)
+ break;
+ usleep_range(1000, 1100);
+ ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
+ 0, 0, 1, &smsr, 1);
+ } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
+ if (ret == -ENODEV) {
+ mutex_unlock(&dev->phy_mutex);
+ return;
+ }
+
+ asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
+ (__u16)loc, 2, &res, 1);
+ asix_set_hw_mii(dev, 1);
+ 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) < 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);
+ strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
+ strlcpy(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;
+
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 22:14:31 +0000