da830evm: Add support for TI EMAC

Adds support for ethernet networking on the da830evm platform.

This platform uses an SoC EMAC interface and a 3 port ethernet
switch as a PHY with an RMII interface. The PHY also has a i2c
interface for configuring the switch functions.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/da830evm/da830evm.c

@@ -34,8 +34,11 @@
 
 #include <common.h>
 #include <i2c.h>
+#include <net.h>
+#include <netdev.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/emif_defs.h>
+#include <asm/arch/emac_defs.h>
 #include <asm/io.h>
 #include "../common/misc.h"
 
@@ -69,6 +72,20 @@ static const struct pinmux_config emifa_nand_pins[] = {
 	{ pinmux[18], 1, 5 },
 };
 
+/* EMAC PHY interface pins */
+static const struct pinmux_config emac_pins[] = {
+	{ pinmux[9], 0, 5 },
+	{ pinmux[10], 2, 1 },
+	{ pinmux[10], 2, 2 },
+	{ pinmux[10], 2, 3 },
+	{ pinmux[10], 2, 4 },
+	{ pinmux[10], 2, 5 },
+	{ pinmux[10], 2, 6 },
+	{ pinmux[10], 2, 7 },
+	{ pinmux[11], 2, 0 },
+	{ pinmux[11], 2, 1 },
+};
+
 /* UART pin muxer settings */
 static const struct pinmux_config uart_pins[] = {
 	{ pinmux[8], 2, 7 },
@@ -77,8 +94,8 @@ static const struct pinmux_config uart_pins[] = {
 
 /* I2C pin muxer settings */
 static const struct pinmux_config i2c_pins[] = {
-	{ pinmux[9], 2, 3 },
-	{ pinmux[9], 2, 4 }
+	{ pinmux[8], 2, 3 },
+	{ pinmux[8], 2, 4 }
 };
 
 /* USB0_DRVVBUS pin muxer settings */
@@ -98,6 +115,9 @@ static const struct pinmux_resource pinmuxes[] = {
 #ifdef CONFIG_USE_NAND
 	PINMUX_ITEM(emifa_nand_pins),
 #endif
+#if defined(CONFIG_DRIVER_TI_EMAC)
+	PINMUX_ITEM(emac_pins),
+#endif
 };
 
 int board_init(void)
@@ -169,3 +189,44 @@ int board_init(void)
 
 	return(0);
 }
+
+#if defined(CONFIG_DRIVER_TI_EMAC)
+
+#define PHY_SW_I2C_ADDR	0x5f /* Address of PHY on i2c bus */
+
+/*
+ * Initializes on-board ethernet controllers.
+ */
+int board_eth_init(bd_t *bis)
+{
+	u_int8_t mac_addr[6];
+	u_int8_t switch_start_cmd[2] = { 0x01, 0x23 };
+
+	/* Read Ethernet MAC address from EEPROM */
+	if (dvevm_read_mac_address(mac_addr))
+		/* set address env if not already set */
+		dv_configure_mac_address(mac_addr);
+
+	/* read the address back from env */
+	if (!eth_getenv_enetaddr("ethaddr", mac_addr))
+		return -1;
+
+	/* provide the resulting addr to the driver */
+	davinci_eth_set_mac_addr(mac_addr);
+
+	/* enable the Ethernet switch in the 3 port PHY */
+	if (i2c_write(PHY_SW_I2C_ADDR, 0, 0,
+			switch_start_cmd, sizeof(switch_start_cmd))) {
+		printf("Ethernet switch start failed!\n");
+		return -1;
+	}
+
+	/* finally, initialise the driver */
+	if (!davinci_emac_initialize()) {
+		printf("Error: Ethernet init failed!\n");
+		return -1;
+	}
+
+	return 0;
+}
+#endif /* CONFIG_DRIVER_TI_EMAC */

include/asm-arm/arch-davinci/emac_defs.h

@@ -367,6 +367,7 @@ typedef struct  {
 
 int davinci_eth_phy_read(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data);
 int davinci_eth_phy_write(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data);
+void davinci_eth_set_mac_addr(const u_int8_t *addr);
 
 typedef struct
 {

include/configs/da830evm.h

@@ -27,6 +27,7 @@
 /*
  * Board
  */
+#define CONFIG_DRIVER_TI_EMAC
 
 /*
  * SoC Configuration