dm: net: usb: Refactor mcs7830 driver ready for DM conversion

Remove stamp data and create common functions for the main Ethernet
operations. This will make it easier to convert this driver to support
driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

1 files changed, 144 insertions, 121 deletions

diff --git a/drivers/usb/eth/mcs7830.c b/drivers/usb/eth/mcs7830.c
index bbdad8b79ae..de40bd6e4cc 100644
--- a/drivers/usb/eth/mcs7830.c
+++ b/drivers/usb/eth/mcs7830.c
@@ -89,13 +89,13 @@ struct mcs7830_private {
 
 /*
  * mcs7830_read_reg() - read a register of the network adapter
- * @dev:	network device to read from
+ * @udev:	network device to read from
  * @idx:	index of the register to start reading from
  * @size:	number of bytes to read
  * @data:	buffer to read into
  * Return: zero upon success, negative upon error
  */
-static int mcs7830_read_reg(struct ueth_data *dev, uint8_t idx,
+static int mcs7830_read_reg(struct usb_device *udev, uint8_t idx,
 			    uint16_t size, void *data)
 {
 	int len;
@@ -103,8 +103,8 @@ static int mcs7830_read_reg(struct ueth_data *dev, uint8_t idx,
 
 	debug("%s() idx=0x%04X sz=%d\n", __func__, idx, size);
 
-	len = usb_control_msg(dev->pusb_dev,
-			      usb_rcvctrlpipe(dev->pusb_dev, 0),
+	len = usb_control_msg(udev,
+			      usb_rcvctrlpipe(udev, 0),
 			      MCS7830_RD_BREQ,
 			      USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			      0, idx, buf, size,
@@ -119,13 +119,13 @@ static int mcs7830_read_reg(struct ueth_data *dev, uint8_t idx,
 
 /*
  * mcs7830_write_reg() - write a register of the network adapter
- * @dev:	network device to write to
+ * @udev:	network device to write to
  * @idx:	index of the register to start writing to
  * @size:	number of bytes to write
  * @data:	buffer holding the data to write
  * Return: zero upon success, negative upon error
  */
-static int mcs7830_write_reg(struct ueth_data *dev, uint8_t idx,
+static int mcs7830_write_reg(struct usb_device *udev, uint8_t idx,
 			     uint16_t size, void *data)
 {
 	int len;
@@ -134,8 +134,8 @@ static int mcs7830_write_reg(struct ueth_data *dev, uint8_t idx,
 	debug("%s() idx=0x%04X sz=%d\n", __func__, idx, size);
 
 	memcpy(buf, data, size);
-	len = usb_control_msg(dev->pusb_dev,
-			      usb_sndctrlpipe(dev->pusb_dev, 0),
+	len = usb_control_msg(udev,
+			      usb_sndctrlpipe(udev, 0),
 			      MCS7830_WR_BREQ,
 			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 			      0, idx, buf, size,
@@ -149,12 +149,12 @@ static int mcs7830_write_reg(struct ueth_data *dev, uint8_t idx,
 
 /*
  * mcs7830_phy_emit_wait() - emit PHY read/write access, wait for its execution
- * @dev:	network device to talk to
+ * @udev:	network device to talk to
  * @rwflag:	PHY_CMD1_READ or PHY_CMD1_WRITE opcode
  * @index:	number of the PHY register to read or write
  * Return: zero upon success, negative upon error
  */
-static int mcs7830_phy_emit_wait(struct ueth_data *dev,
+static int mcs7830_phy_emit_wait(struct usb_device *udev,
 				 uint8_t rwflag, uint8_t index)
 {
 	int rc;
@@ -164,14 +164,14 @@ static int mcs7830_phy_emit_wait(struct ueth_data *dev,
 	/* send the PHY read/write request */
 	cmd[0] = rwflag | PHY_CMD1_PHYADDR;
 	cmd[1] = PHY_CMD2_PEND | (index & 0x1f);
-	rc = mcs7830_write_reg(dev, REG_PHY_CMD, sizeof(cmd), cmd);
+	rc = mcs7830_write_reg(udev, REG_PHY_CMD, sizeof(cmd), cmd);
 	if (rc < 0)
 		return rc;
 
 	/* wait for the response to become available (usually < 1ms) */
 	retry = 10;
 	do {
-		rc = mcs7830_read_reg(dev, REG_PHY_CMD, sizeof(cmd), cmd);
+		rc = mcs7830_read_reg(udev, REG_PHY_CMD, sizeof(cmd), cmd);
 		if (rc < 0)
 			return rc;
 		if (cmd[1] & PHY_CMD2_READY)
@@ -185,50 +185,51 @@ static int mcs7830_phy_emit_wait(struct ueth_data *dev,
 
 /*
  * mcs7830_read_phy() - read a PHY register of the network adapter
- * @dev:	network device to read from
+ * @udev:	network device to read from
  * @index:	index of the PHY register to read from
  * Return: non-negative 16bit register content, negative upon error
  */
-static int mcs7830_read_phy(struct ueth_data *dev, uint8_t index)
+static int mcs7830_read_phy(struct usb_device *udev, uint8_t index)
 {
 	int rc;
 	uint16_t val;
 
 	/* issue the PHY read request and wait for its execution */
-	rc = mcs7830_phy_emit_wait(dev, PHY_CMD1_READ, index);
+	rc = mcs7830_phy_emit_wait(udev, PHY_CMD1_READ, index);
 	if (rc < 0)
 		return rc;
 
 	/* fetch the PHY data which was read */
-	rc = mcs7830_read_reg(dev, REG_PHY_DATA, sizeof(val), &val);
+	rc = mcs7830_read_reg(udev, REG_PHY_DATA, sizeof(val), &val);
 	if (rc < 0)
 		return rc;
 	rc = le16_to_cpu(val);
-	debug("%s(%s, %d) => 0x%04X\n", __func__, dev->eth_dev.name, index, rc);
+	debug("%s(%d) => 0x%04X\n", __func__, index, rc);
 	return rc;
 }
 
 /*
  * mcs7830_write_phy() - write a PHY register of the network adapter
- * @dev:	network device to write to
+ * @udev:	network device to write to
  * @index:	index of the PHY register to write to
  * @val:	value to write to the PHY register
  * Return: zero upon success, negative upon error
  */
-static int mcs7830_write_phy(struct ueth_data *dev, uint8_t index, uint16_t val)
+static int mcs7830_write_phy(struct usb_device *udev, uint8_t index,
+			     uint16_t val)
 {
 	int rc;
 
-	debug("%s(%s, %d, 0x%04X)\n", __func__, dev->eth_dev.name, index, val);
+	debug("%s(%d, 0x%04X)\n", __func__, index, val);
 
 	/* setup the PHY data which is to get written */
 	val = cpu_to_le16(val);
-	rc = mcs7830_write_reg(dev, REG_PHY_DATA, sizeof(val), &val);
+	rc = mcs7830_write_reg(udev, REG_PHY_DATA, sizeof(val), &val);
 	if (rc < 0)
 		return rc;
 
 	/* issue the PHY write request and wait for its execution */
-	rc = mcs7830_phy_emit_wait(dev, PHY_CMD1_WRITE, index);
+	rc = mcs7830_phy_emit_wait(udev, PHY_CMD1_WRITE, index);
 	if (rc < 0)
 		return rc;
 
@@ -237,21 +238,21 @@ static int mcs7830_write_phy(struct ueth_data *dev, uint8_t index, uint16_t val)
 
 /*
  * mcs7830_write_config() - write to the network adapter's config register
- * @eth:	network device to write to
+ * @udev:	network device to write to
+ * @priv:	private data
  * Return: zero upon success, negative upon error
  *
  * the data which gets written is taken from the shadow config register
  * within the device driver's private data
  */
-static int mcs7830_write_config(struct ueth_data *dev)
+static int mcs7830_write_config(struct usb_device *udev,
+				struct mcs7830_private *priv)
 {
-	struct mcs7830_private *priv;
 	int rc;
 
 	debug("%s()\n", __func__);
-	priv = dev->dev_priv;
 
-	rc = mcs7830_write_reg(dev, REG_CONFIG,
+	rc = mcs7830_write_reg(udev, REG_CONFIG,
 			       sizeof(priv->config), &priv->config);
 	if (rc < 0) {
 		debug("writing config to adapter failed\n");
@@ -263,21 +264,21 @@ static int mcs7830_write_config(struct ueth_data *dev)
 
 /*
  * mcs7830_write_mchash() - write the network adapter's multicast filter
- * @eth:	network device to write to
+ * @udev:	network device to write to
+ * @priv:	private data
  * Return: zero upon success, negative upon error
  *
  * the data which gets written is taken from the shadow multicast hashes
  * within the device driver's private data
  */
-static int mcs7830_write_mchash(struct ueth_data *dev)
+static int mcs7830_write_mchash(struct usb_device *udev,
+				struct mcs7830_private *priv)
 {
-	struct mcs7830_private *priv;
 	int rc;
 
 	debug("%s()\n", __func__);
-	priv = dev->dev_priv;
 
-	rc = mcs7830_write_reg(dev, REG_MULTICAST_HASH,
+	rc = mcs7830_write_reg(udev, REG_MULTICAST_HASH,
 			       sizeof(priv->mchash), &priv->mchash);
 	if (rc < 0) {
 		debug("writing multicast hash to adapter failed\n");
@@ -289,12 +290,12 @@ static int mcs7830_write_mchash(struct ueth_data *dev)
 
 /*
  * mcs7830_set_autoneg() - setup and trigger ethernet link autonegotiation
- * @eth:	network device to run link negotiation on
+ * @udev:	network device to run link negotiation on
  * Return: zero upon success, negative upon error
  *
  * the routine advertises available media and starts autonegotiation
  */
-static int mcs7830_set_autoneg(struct ueth_data *dev)
+static int mcs7830_set_autoneg(struct usb_device *udev)
 {
 	int adv, flg;
 	int rc;
@@ -310,39 +311,39 @@ static int mcs7830_set_autoneg(struct ueth_data *dev)
 	 */
 
 	adv = ADVERTISE_PAUSE_CAP | ADVERTISE_ALL | ADVERTISE_CSMA;
-	rc = mcs7830_write_phy(dev, MII_ADVERTISE, adv);
+	rc = mcs7830_write_phy(udev, MII_ADVERTISE, adv);
 
 	flg = 0;
 	if (!rc)
-		rc = mcs7830_write_phy(dev, MII_BMCR, flg);
+		rc = mcs7830_write_phy(udev, MII_BMCR, flg);
 
 	flg |= BMCR_ANENABLE;
 	if (!rc)
-		rc = mcs7830_write_phy(dev, MII_BMCR, flg);
+		rc = mcs7830_write_phy(udev, MII_BMCR, flg);
 
 	flg |= BMCR_ANRESTART;
 	if (!rc)
-		rc = mcs7830_write_phy(dev, MII_BMCR, flg);
+		rc = mcs7830_write_phy(udev, MII_BMCR, flg);
 
 	return rc;
 }
 
 /*
  * mcs7830_get_rev() - identify a network adapter's chip revision
- * @eth:	network device to identify
+ * @udev:	network device to identify
  * Return: non-negative number, reflecting the revision number
  *
  * currently, only "rev C and higher" and "below rev C" are needed, so
  * the return value is #1 for "below rev C", and #2 for "rev C and above"
  */
-static int mcs7830_get_rev(struct ueth_data *dev)
+static int mcs7830_get_rev(struct usb_device *udev)
 {
 	uint8_t buf[2];
 	int rc;
 	int rev;
 
 	/* register 22 is readable in rev C and higher */
-	rc = mcs7830_read_reg(dev, REG_FRAME_DROP_COUNTER, sizeof(buf), buf);
+	rc = mcs7830_read_reg(udev, REG_FRAME_DROP_COUNTER, sizeof(buf), buf);
 	if (rc < 0)
 		rev = 1;
 	else
@@ -353,19 +354,19 @@ static int mcs7830_get_rev(struct ueth_data *dev)
 
 /*
  * mcs7830_apply_fixup() - identify an adapter and potentially apply fixups
- * @eth:	network device to identify and apply fixups to
+ * @udev:	network device to identify and apply fixups to
  * Return: zero upon success (no errors emitted from here)
  *
  * this routine identifies the network adapter's chip revision, and applies
  * fixups for known issues
  */
-static int mcs7830_apply_fixup(struct ueth_data *dev)
+static int mcs7830_apply_fixup(struct usb_device *udev)
 {
 	int rev;
 	int i;
 	uint8_t thr;
 
-	rev = mcs7830_get_rev(dev);
+	rev = mcs7830_get_rev(udev);
 	debug("%s() rev=%d\n", __func__, rev);
 
 	/*
@@ -374,10 +375,10 @@ static int mcs7830_apply_fixup(struct ueth_data *dev)
 	 * exactly", the introductory comment says "rev C and above")
 	 */
 	if (rev == 2) {
-		debug("%s: applying rev C fixup\n", dev->eth_dev.name);
+		debug("%s: applying rev C fixup\n", __func__);
 		thr = PAUSE_THRESHOLD_DEFAULT;
 		for (i = 0; i < 2; i++) {
-			(void)mcs7830_write_reg(dev, REG_PAUSE_THRESHOLD,
+			(void)mcs7830_write_reg(udev, REG_PAUSE_THRESHOLD,
 						sizeof(thr), &thr);
 			mdelay(1);
 		}
@@ -395,13 +396,12 @@ static int mcs7830_apply_fixup(struct ueth_data *dev)
  * of the interface callbacks can exchange ethernet frames; link negotiation is
  * triggered from here already and continues in background
  */
-static int mcs7830_basic_reset(struct ueth_data *dev)
+static int mcs7830_basic_reset(struct usb_device *udev,
+			       struct mcs7830_private *priv)
 {
-	struct mcs7830_private *priv;
 	int rc;
 
 	debug("%s()\n", __func__);
-	priv = dev->dev_priv;
 
 	/*
 	 * comment from the respective Linux driver, which
@@ -411,25 +411,25 @@ static int mcs7830_basic_reset(struct ueth_data *dev)
 	priv->config = CONF_TXENABLE;
 	priv->config |= CONF_ALLMULTICAST;
 
-	rc = mcs7830_set_autoneg(dev);
+	rc = mcs7830_set_autoneg(udev);
 	if (rc < 0) {
 		error("setting autoneg failed\n");
 		return rc;
 	}
 
-	rc = mcs7830_write_mchash(dev);
+	rc = mcs7830_write_mchash(udev, priv);
 	if (rc < 0) {
 		error("failed to set multicast hash\n");
 		return rc;
 	}
 
-	rc = mcs7830_write_config(dev);
+	rc = mcs7830_write_config(udev, priv);
 	if (rc < 0) {
 		error("failed to set configuration\n");
 		return rc;
 	}
 
-	rc = mcs7830_apply_fixup(dev);
+	rc = mcs7830_apply_fixup(udev);
 	if (rc < 0) {
 		error("fixup application failed\n");
 		return rc;
@@ -440,51 +440,38 @@ static int mcs7830_basic_reset(struct ueth_data *dev)
 
 /*
  * mcs7830_read_mac() - read an ethernet adapter's MAC address
- * @eth:	network device to read from
+ * @udev:	network device to read from
+ * @enetaddr:	place to put ethernet MAC address
  * Return: zero upon success, negative upon error
  *
  * this routine fetches the MAC address stored within the ethernet adapter,
  * and stores it in the ethernet interface's data structure
  */
-static int mcs7830_read_mac(struct eth_device *eth)
+static int mcs7830_read_mac(struct usb_device *udev, unsigned char enetaddr[])
 {
-	struct ueth_data *dev;
 	int rc;
 	uint8_t buf[ETH_ALEN];
 
 	debug("%s()\n", __func__);
-	dev = eth->priv;
 
-	rc = mcs7830_read_reg(dev, REG_ETHER_ADDR, ETH_ALEN, buf);
+	rc = mcs7830_read_reg(udev, REG_ETHER_ADDR, ETH_ALEN, buf);
 	if (rc < 0) {
 		debug("reading MAC from adapter failed\n");
 		return rc;
 	}
 
-	memcpy(&eth->enetaddr[0], buf, ETH_ALEN);
+	memcpy(enetaddr, buf, ETH_ALEN);
 	return 0;
 }
 
-/*
- * mcs7830_write_mac() - write an ethernet adapter's MAC address
- * @eth:	network device to write to
- * Return: zero upon success, negative upon error
- *
- * this routine takes the MAC address from the ethernet interface's data
- * structure, and writes it into the ethernet adapter such that subsequent
- * exchange of ethernet frames uses this address
- */
-static int mcs7830_write_mac(struct eth_device *eth)
+static int mcs7830_write_mac_common(struct usb_device *udev,
+				    unsigned char enetaddr[])
 {
-	struct ueth_data *dev;
 	int rc;
 
 	debug("%s()\n", __func__);
-	dev = eth->priv;
 
-	if (sizeof(eth->enetaddr) != ETH_ALEN)
-		return -EINVAL;
-	rc = mcs7830_write_reg(dev, REG_ETHER_ADDR, ETH_ALEN, eth->enetaddr);
+	rc = mcs7830_write_reg(udev, REG_ETHER_ADDR, ETH_ALEN, enetaddr);
 	if (rc < 0) {
 		debug("writing MAC to adapter failed\n");
 		return rc;
@@ -492,28 +479,16 @@ static int mcs7830_write_mac(struct eth_device *eth)
 	return 0;
 }
 
-/*
- * mcs7830_init() - network interface's init callback
- * @eth:	network device to initialize
- * @bd:		board information
- * Return: zero upon success, negative upon error
- *
- * after initial setup during probe() and get_info(), this init() callback
- * ensures that the link is up and subsequent send() and recv() calls can
- * exchange ethernet frames
- */
-static int mcs7830_init(struct eth_device *eth, bd_t *bd)
+static int mcs7830_init_common(struct usb_device *udev)
 {
-	struct ueth_data *dev;
 	int timeout;
 	int have_link;
 
 	debug("%s()\n", __func__);
-	dev = eth->priv;
 
 	timeout = 0;
 	do {
-		have_link = mcs7830_read_phy(dev, MII_BMSR) & BMSR_LSTATUS;
+		have_link = mcs7830_read_phy(udev, MII_BMSR) & BMSR_LSTATUS;
 		if (have_link)
 			break;
 		udelay(LINKSTATUS_TIMEOUT_RES * 1000);
@@ -526,28 +501,18 @@ static int mcs7830_init(struct eth_device *eth, bd_t *bd)
 	return 0;
 }
 
-/*
- * mcs7830_send() - network interface's send callback
- * @eth:	network device to send the frame from
- * @packet:	ethernet frame content
- * @length:	ethernet frame length
- * Return: zero upon success, negative upon error
- *
- * this routine send an ethernet frame out of the network interface
- */
-static int mcs7830_send(struct eth_device *eth, void *packet, int length)
+static int mcs7830_send_common(struct ueth_data *ueth, void *packet,
+			       int length)
 {
-	struct ueth_data *dev;
+	struct usb_device *udev = ueth->pusb_dev;
 	int rc;
 	int gotlen;
 	/* there is a status byte after the ethernet frame */
 	ALLOC_CACHE_ALIGN_BUFFER(uint8_t, buf, PKTSIZE + sizeof(uint8_t));
 
-	dev = eth->priv;
-
 	memcpy(buf, packet, length);
-	rc = usb_bulk_msg(dev->pusb_dev,
-			  usb_sndbulkpipe(dev->pusb_dev, dev->ep_out),
+	rc = usb_bulk_msg(udev,
+			  usb_sndbulkpipe(udev, ueth->ep_out),
 			  &buf[0], length, &gotlen,
 			  USBCALL_TIMEOUT);
 	debug("%s() TX want len %d, got len %d, rc %d\n",
@@ -555,28 +520,17 @@ static int mcs7830_send(struct eth_device *eth, void *packet, int length)
 	return rc;
 }
 
-/*
- * mcs7830_recv() - network interface's recv callback
- * @eth:	network device to receive frames from
- * Return: zero upon success, negative upon error
- *
- * this routine checks for available ethernet frames that the network
- * interface might have received, and notifies the network stack
- */
-static int mcs7830_recv(struct eth_device *eth)
+static int mcs7830_recv_common(struct ueth_data *ueth, uint8_t *buf)
 {
-	struct ueth_data *dev;
-	ALLOC_CACHE_ALIGN_BUFFER(uint8_t, buf, MCS7830_RX_URB_SIZE);
 	int rc, wantlen, gotlen;
 	uint8_t sts;
 
 	debug("%s()\n", __func__);
-	dev = eth->priv;
 
 	/* fetch input data from the adapter */
 	wantlen = MCS7830_RX_URB_SIZE;
-	rc = usb_bulk_msg(dev->pusb_dev,
-			  usb_rcvbulkpipe(dev->pusb_dev, dev->ep_in),
+	rc = usb_bulk_msg(ueth->pusb_dev,
+			  usb_rcvbulkpipe(ueth->pusb_dev, ueth->ep_in),
 			  &buf[0], wantlen, &gotlen,
 			  USBCALL_TIMEOUT);
 	debug("%s() RX want len %d, got len %d, rc %d\n",
@@ -601,8 +555,7 @@ static int mcs7830_recv(struct eth_device *eth)
 
 	if (sts == STAT_RX_FRAME_CORRECT) {
 		debug("%s() got a frame, len=%d\n", __func__, gotlen);
-		net_process_received_packet(buf, gotlen);
-		return 0;
+		return gotlen;
 	}
 
 	debug("RX: frame error (sts 0x%02X, %s %s %s %s %s)\n",
@@ -616,6 +569,60 @@ static int mcs7830_recv(struct eth_device *eth)
 }
 
 /*
+ * mcs7830_init() - network interface's init callback
+ * @udev:	network device to initialize
+ * @bd:		board information
+ * Return: zero upon success, negative upon error
+ *
+ * after initial setup during probe() and get_info(), this init() callback
+ * ensures that the link is up and subsequent send() and recv() calls can
+ * exchange ethernet frames
+ */
+static int mcs7830_init(struct eth_device *eth, bd_t *bd)
+{
+	struct ueth_data *dev = eth->priv;
+
+	return mcs7830_init_common(dev->pusb_dev);
+}
+
+/*
+ * mcs7830_send() - network interface's send callback
+ * @eth:	network device to send the frame from
+ * @packet:	ethernet frame content
+ * @length:	ethernet frame length
+ * Return: zero upon success, negative upon error
+ *
+ * this routine send an ethernet frame out of the network interface
+ */
+static int mcs7830_send(struct eth_device *eth, void *packet, int length)
+{
+	struct ueth_data *dev = eth->priv;
+
+	return mcs7830_send_common(dev, packet, length);
+}
+
+/*
+ * mcs7830_recv() - network interface's recv callback
+ * @eth:	network device to receive frames from
+ * Return: zero upon success, negative upon error
+ *
+ * this routine checks for available ethernet frames that the network
+ * interface might have received, and notifies the network stack
+ */
+static int mcs7830_recv(struct eth_device *eth)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(uint8_t, buf, MCS7830_RX_URB_SIZE);
+	struct ueth_data *ueth = eth->priv;
+	int len;
+
+	len = mcs7830_recv_common(ueth, buf);
+	if (len <= 0)
+		net_process_received_packet(buf, len);
+
+	return 0;
+}
+
+/*
  * mcs7830_halt() - network interface's halt callback
  * @eth:	network device to cease operation of
  * Return: none
@@ -629,6 +636,22 @@ static void mcs7830_halt(struct eth_device *eth)
 }
 
 /*
+ * mcs7830_write_mac() - write an ethernet adapter's MAC address
+ * @eth:	network device to write to
+ * Return: zero upon success, negative upon error
+ *
+ * this routine takes the MAC address from the ethernet interface's data
+ * structure, and writes it into the ethernet adapter such that subsequent
+ * exchange of ethernet frames uses this address
+ */
+static int mcs7830_write_mac(struct eth_device *eth)
+{
+	struct ueth_data *ueth = eth->priv;
+
+	return mcs7830_write_mac_common(ueth->pusb_dev, eth->enetaddr);
+}
+
+/*
  * mcs7830_iface_idx - index of detected network interfaces
  *
  * this counter keeps track of identified supported interfaces,
@@ -802,10 +825,10 @@ int mcs7830_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 	eth->write_hwaddr = mcs7830_write_mac;
 	eth->priv = ss;
 
-	if (mcs7830_basic_reset(ss))
+	if (mcs7830_basic_reset(ss->pusb_dev, ss->dev_priv))
 		return 0;
 
-	if (mcs7830_read_mac(eth))
+	if (mcs7830_read_mac(ss->pusb_dev, eth->enetaddr))
 		return 0;
 	debug("MAC %pM\n", eth->enetaddr);