remove platform specific initialization from ethernet driver

Hardware filtering must always be enabled as long as there is an Ethernet
device registered, and use device tree for setting the link activity and
buffer shifting enable/disable bit.

SVN-Revision: 32486

target/linux/mcs814x/files-3.3/arch/arm/boot/dts/mcs8140.dtsi

@@ -37,11 +37,12 @@
 			ranges;
 
 			eth0: ethernet@40084000 {
-				//compatible = "moschip,mcs814x-eth";
 				compatible = "moschip,nuport-mac";
 				reg = <0x40084000 0xd8		// mac
 					0x40080000 0x58>;	// dma channels
 				interrupts = <4 5 29>;	/* tx, rx, link */
+				nuport-mac,buffer-shifting;
+				nuport-mac,link-activity = <0>;
 			};
 
 			tso@40088000 {

target/linux/mcs814x/files-3.3/arch/arm/boot/dts/rbt-832.dts

@@ -19,6 +19,9 @@
 
 	ahb {
 		vci {
+			eth0: ethernet@40084000 {
+				nuport-mac,link-activity = <0x01>;
+			};
 
 			adc {
 				sdram: memory@0,0 {

target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/common.c

@@ -12,6 +12,8 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/setup.h>
 #include <asm/mach-types.h>
@@ -31,9 +33,12 @@ static struct map_desc mcs814x_io_desc[] __initdata = {
 };
 
 #define SYSDBG_BS2		0x04
+#define  LED_CFG_MASK		0x03
 #define  CPU_MODE_SHIFT		23
 #define  CPU_MODE_MASK		0x03
 
+#define SYSDBG_SYSCTL_MAC	0x1d
+
 struct cpu_mode {
 	const char *name;
 	int gpio_start;
@@ -63,6 +68,70 @@ static const struct cpu_mode cpu_modes[] = {
 	},
 };
 
+static void mcs814x_eth_hardware_filter_set(u8 value)
+{
+	u32 reg;
+
+	reg = __raw_readl(_CONFADDR_DBGLED);
+	if (value)
+		reg |= 0x80;
+	else
+		reg &= ~0x80;
+	__raw_writel(reg, _CONFADDR_DBGLED);
+}
+
+static void mcs814x_eth_led_cfg_set(u8 cfg)
+{
+	u32 reg;
+
+	reg = __raw_readl(_CONFADDR_SYSDBG + SYSDBG_BS2);
+	reg &= ~LED_CFG_MASK;
+	reg |= cfg;
+	__raw_writel(reg, _CONFADDR_SYSDBG + SYSDBG_BS2);
+}
+
+static void mcs814x_eth_buffer_shifting_set(u8 value)
+{
+	u8 reg;
+
+	reg = __raw_readb(_CONFADDR_SYSDBG + SYSDBG_SYSCTL_MAC);
+	if (value)
+		reg |= 0x01;
+	else
+		reg &= ~0x01;
+	__raw_writeb(reg, _CONFADDR_SYSDBG + SYSDBG_SYSCTL_MAC);
+}
+
+static struct of_device_id mcs814x_eth_ids[] __initdata = {
+	{ .compatible = "moschip,nuport-mac", },
+	{ /* sentinel */ },
+};
+
+/* Configure platform specific knobs based on ethernet device node
+ * properties */
+static void mcs814x_eth_init(void)
+{
+	struct device_node *np;
+	const unsigned int *intspec;
+
+	np = of_find_matching_node(NULL, mcs814x_eth_ids);
+	if (!np)
+		return;
+
+	/* hardware filter must always be enabled */
+	mcs814x_eth_hardware_filter_set(1);
+
+	intspec = of_get_property(np, "nuport-mac,buffer-shifting", NULL);
+	if (!intspec)
+		mcs814x_eth_buffer_shifting_set(0);
+	else
+		mcs814x_eth_buffer_shifting_set(1);
+
+	intspec = of_get_property(np, "nuport-mac,link-activity", NULL);
+	if (intspec)
+		mcs814x_eth_led_cfg_set(be32_to_cpup(intspec));
+}
+
 void __init mcs814x_init_machine(void)
 {
 	u32 bs2, cpu_mode;
@@ -79,6 +148,8 @@ void __init mcs814x_init_machine(void)
 		if (gpio != -1)
 			gpio_request(gpio, cpu_modes[cpu_mode].name);
 	}
+
+	mcs814x_eth_init();
 }
 
 void __init mcs814x_map_io(void)

target/linux/mcs814x/files-3.3/drivers/net/ethernet/mcs8140/nuport_mac.c

@@ -27,7 +27,6 @@
 
 #include <asm/unaligned.h>
 #include <asm/sizes.h>
-#include <mach/hardware.h>
 
 /* Hardware registers */
 #define MAC_BASE_ADDR		((priv->mac_base))
@@ -140,6 +139,7 @@ struct nuport_mac_priv {
 	int			old_link;
 	int			old_duplex;
 	u32			msg_level;
+	unsigned int		buffer_shifting_len;
 };
 
 static inline int nuport_mac_mii_busy_wait(struct nuport_mac_priv *priv)
@@ -515,8 +515,8 @@ static int nuport_mac_rx(struct net_device *dev, int limit)
 		len = priv->pkt_len[priv->cur_rx];
 
 		/* Remove 2 bytes added by RX buffer shifting */
-		len = len - 2;
+		len = len - priv->buffer_shifting_len;
-		skb->data = skb->data + 2;
+		skb->data = skb->data + priv->buffer_shifting_len;
 
 		/* Get packet status */
 		status = get_unaligned((u32 *) (skb->data + len));
@@ -691,18 +691,6 @@ static int nuport_mac_open(struct net_device *dev)
 	int ret;
 	struct nuport_mac_priv *priv = netdev_priv(dev);
 	unsigned long flags;
-	u32 reg;
-	u8 tmp;
-
-	/* Enable hardware filters */
-	reg = nuport_mac_readl((void __iomem *)_CONFADDR_DBGLED);
-	reg |= 0x80;
-	nuport_mac_writel(reg, (void __iomem *)_CONFADDR_DBGLED);
-
-	/* Set LEDs to Link act and RX/TX mode */
-	reg = nuport_mac_readl((void __iomem *)(_CONFADDR_SYSDBG + 0x04));
-	reg |= 0x01;
-	nuport_mac_writel(reg, (void __iomem *)(_CONFADDR_SYSDBG + 0x04));
 
 	ret = clk_enable(priv->emac_clk);
 	if (ret) {
@@ -747,11 +735,6 @@ static int nuport_mac_open(struct net_device *dev)
 		goto out_tx_irq;
 	}
 
-	/* Enable buffer shifting in RX */
-	tmp = nuport_mac_readb((void __iomem *)(_CONFADDR_SYSDBG + 0x1D));
-	tmp |= 0x01;
-	nuport_mac_writeb(tmp, (void __iomem *)(_CONFADDR_SYSDBG + 0x1D));
-
 	netif_start_queue(dev);
 
 	nuport_mac_init_tx_ring(priv);
@@ -947,6 +930,7 @@ static int __init nuport_mac_probe(struct platform_device *pdev)
 	int ret = 0;
 	int rx_irq, tx_irq, link_irq;
 	int i;
+	const unsigned int *intspec;
 
 	dev = alloc_etherdev(sizeof(struct nuport_mac_priv));
 	if (!dev) {
@@ -977,6 +961,13 @@ static int __init nuport_mac_probe(struct platform_device *pdev)
 	priv->dev = dev;
 	spin_lock_init(&priv->lock);
 
+	intspec = of_get_property(pdev->dev.of_node,
+				"nuport-mac,buffer-shifting", NULL);
+	if (!intspec)
+		priv->buffer_shifting_len = 0;
+	else
+		priv->buffer_shifting_len = 2;
+
 	priv->mac_base = devm_ioremap(&pdev->dev,
 				regs->start, resource_size(regs));
 	if (!priv->mac_base) {