net: introduce transparent driver private in ueth_data

Avoid clutter in ueth_data. Individual drivers should not mess
with structures belonging to the core like this.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/usb/eth/smsc95xx.c

@@ -25,6 +25,7 @@
 #include <usb.h>
 #include <linux/mii.h>
 #include "usb_ether.h"
+#include <malloc.h>
 
 /* SMSC LAN95xx based USB 2.0 Ethernet Devices */
 
@@ -146,6 +147,12 @@
 /* local vars */
 static int curr_eth_dev; /* index for name of next device detected */
 
+/* driver private */
+struct smsc95xx_private {
+	size_t rx_urb_size;  /* maximum USB URB size */
+	u32 mac_cr;  /* MAC control register value */
+	int have_hwaddr;  /* 1 if we have a hardware MAC address */
+};
 
 /*
  * Smsc95xx infrastructure commands
@@ -377,6 +384,7 @@ static int smsc95xx_init_mac_address(struct eth_device *eth,
 static int smsc95xx_write_hwaddr(struct eth_device *eth)
 {
 	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	struct smsc95xx_private *priv = dev->dev_priv;
 	u32 addr_lo = __get_unaligned_le32(&eth->enetaddr[0]);
 	u32 addr_hi = __get_unaligned_le16(&eth->enetaddr[4]);
 	int ret;
@@ -392,7 +400,7 @@ static int smsc95xx_write_hwaddr(struct eth_device *eth)
 		return ret;
 
 	debug("MAC %pM\n", eth->enetaddr);
-	dev->have_hwaddr = 1;
+	priv->have_hwaddr = 1;
 	return 0;
 }
 
@@ -425,19 +433,22 @@ static int smsc95xx_set_csums(struct ueth_data *dev,
 
 static void smsc95xx_set_multicast(struct ueth_data *dev)
 {
+	struct smsc95xx_private *priv = dev->dev_priv;
+
 	/* No multicast in u-boot */
-	dev->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
+	priv->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 }
 
 /* starts the TX path */
 static void smsc95xx_start_tx_path(struct ueth_data *dev)
 {
+	struct smsc95xx_private *priv = dev->dev_priv;
 	u32 reg_val;
 
 	/* Enable Tx at MAC */
-	dev->mac_cr |= MAC_CR_TXEN_;
+	priv->mac_cr |= MAC_CR_TXEN_;
 
-	smsc95xx_write_reg(dev, MAC_CR, dev->mac_cr);
+	smsc95xx_write_reg(dev, MAC_CR, priv->mac_cr);
 
 	/* Enable Tx at SCSRs */
 	reg_val = TX_CFG_ON_;
@@ -447,8 +458,10 @@ static void smsc95xx_start_tx_path(struct ueth_data *dev)
 /* Starts the Receive path */
 static void smsc95xx_start_rx_path(struct ueth_data *dev)
 {
-	dev->mac_cr |= MAC_CR_RXEN_;
-	smsc95xx_write_reg(dev, MAC_CR, dev->mac_cr);
+	struct smsc95xx_private *priv = dev->dev_priv;
+
+	priv->mac_cr |= MAC_CR_RXEN_;
+	smsc95xx_write_reg(dev, MAC_CR, priv->mac_cr);
 }
 
 /*
@@ -462,6 +475,8 @@ static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
 	u32 burst_cap;
 	int timeout;
 	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	struct smsc95xx_private *priv =
+		(struct smsc95xx_private *)dev->dev_priv;
 #define TIMEOUT_RESOLUTION 50	/* ms */
 	int link_detected;
 
@@ -504,9 +519,9 @@ static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
 		debug("timeout waiting for PHY Reset\n");
 		return -1;
 	}
-	if (!dev->have_hwaddr && smsc95xx_init_mac_address(eth, dev) == 0)
-		dev->have_hwaddr = 1;
-	if (!dev->have_hwaddr) {
+	if (!priv->have_hwaddr && smsc95xx_init_mac_address(eth, dev) == 0)
+		priv->have_hwaddr = 1;
+	if (!priv->have_hwaddr) {
 		puts("Error: SMSC95xx: No MAC address set - set usbethaddr\n");
 		return -1;
 	}
@@ -532,16 +547,16 @@ static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
 #ifdef TURBO_MODE
 	if (dev->pusb_dev->speed == USB_SPEED_HIGH) {
 		burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
-		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
+		priv->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 	} else {
 		burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
-		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
+		priv->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 	}
 #else
 	burst_cap = 0;
-	dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
+	priv->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 #endif
-	debug("rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
+	debug("rx_urb_size=%ld\n", (ulong)priv->rx_urb_size);
 
 	ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 	if (ret < 0)
@@ -606,7 +621,7 @@ static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
 	if (ret < 0)
 		return ret;
 
-	ret = smsc95xx_read_reg(dev, MAC_CR, &dev->mac_cr);
+	ret = smsc95xx_read_reg(dev, MAC_CR, &priv->mac_cr);
 	if (ret < 0)
 		return ret;
 
@@ -857,6 +872,12 @@ int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum,
 		return 0;
 	}
 	dev->privptr = (void *)ss;
+
+	/* alloc driver private */
+	ss->dev_priv = calloc(1, sizeof(struct smsc95xx_private));
+	if (!ss->dev_priv)
+		return 0;
+
 	return 1;
 }
 

include/usb_ether.h

@@ -50,12 +50,8 @@ struct ueth_data {
 	unsigned char	protocol;		/* .............. */
 	unsigned char	irqinterval;	/* Intervall for IRQ Pipe */
 
-	/* private fields for each driver can go here if needed */
-#ifdef CONFIG_USB_ETHER_SMSC95XX
-	size_t rx_urb_size;  /* maximum USB URB size */
-	u32 mac_cr;  /* MAC control register value */
-	int have_hwaddr;  /* 1 if we have a hardware MAC address */
-#endif
+	/* driver private */
+	void *dev_priv;
 };
 
 /*