+
+#ifdef CONFIG_DRIVER_TI_EMAC
+
+#ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
+/**
+ * rmii_hw_init
+ *
+ * DA850/OMAP-L138 EVM can interface to a daughter card for
+ * additional features. This card has an I2C GPIO Expander TCA6416
+ * to select the required functions like camera, RMII Ethernet,
+ * character LCD, video.
+ *
+ * Initialization of the expander involves configuring the
+ * polarity and direction of the ports. P07-P05 are used here.
+ * These ports are connected to a Mux chip which enables only one
+ * functionality at a time.
+ *
+ * For RMII phy to respond, the MII MDIO clock has to be disabled
+ * since both the PHY devices have address as zero. The MII MDIO
+ * clock is controlled via GPIO2[6].
+ *
+ * This code is valid for Beta version of the hardware
+ */
+int rmii_hw_init(void)
+{
+ const struct pinmux_config gpio_pins[] = {
+ { pinmux(6), 8, 1 }
+ };
+ u_int8_t buf[2];
+ unsigned int temp;
+ int ret;
+
+ /* PinMux for GPIO */
+ if (davinci_configure_pin_mux(gpio_pins, ARRAY_SIZE(gpio_pins)) != 0)
+ return 1;
+
+ /* I2C Exapnder configuration */
+ /* Set polarity to non-inverted */
+ buf[0] = 0x0;
+ buf[1] = 0x0;
+ ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 4, 1, buf, 2);
+ if (ret) {
+ printf("\nExpander @ 0x%02x write FAILED!!!\n",
+ CONFIG_SYS_I2C_EXPANDER_ADDR);
+ return ret;
+ }
+
+ /* Configure P07-P05 as outputs */
+ buf[0] = 0x1f;
+ buf[1] = 0xff;
+ ret = i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 6, 1, buf, 2);
+ if (ret) {
+ printf("\nExpander @ 0x%02x write FAILED!!!\n",
+ CONFIG_SYS_I2C_EXPANDER_ADDR);
+ }
+
+ /* For Ethernet RMII selection
+ * P07(SelA)=0
+ * P06(SelB)=1
+ * P05(SelC)=1
+ */
+ if (i2c_read(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) {
+ printf("\nExpander @ 0x%02x read FAILED!!!\n",
+ CONFIG_SYS_I2C_EXPANDER_ADDR);
+ }
+
+ buf[0] &= 0x1f;
+ buf[0] |= (0 << 7) | (1 << 6) | (1 << 5);
+ if (i2c_write(CONFIG_SYS_I2C_EXPANDER_ADDR, 2, 1, buf, 1)) {
+ printf("\nExpander @ 0x%02x write FAILED!!!\n",
+ CONFIG_SYS_I2C_EXPANDER_ADDR);
+ }
+
+ /* Set the output as high */
+ temp = REG(GPIO_BANK2_REG_SET_ADDR);
+ temp |= (0x01 << 6);
+ REG(GPIO_BANK2_REG_SET_ADDR) = temp;
+
+ /* Set the GPIO direction as output */
+ temp = REG(GPIO_BANK2_REG_DIR_ADDR);
+ temp &= ~(0x01 << 6);
+ REG(GPIO_BANK2_REG_DIR_ADDR) = temp;
+
+ return 0;
+}
+#endif /* CONFIG_DRIVER_TI_EMAC_USE_RMII */
+
+/*
+ * Initializes on-board ethernet controllers.
+ */
+int board_eth_init(bd_t *bis)
+{
+#ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII
+ /* Select RMII fucntion through the expander */
+ if (rmii_hw_init())
+ printf("RMII hardware init failed!!!\n");
+#endif
+ if (!davinci_emac_initialize()) {
+ printf("Error: Ethernet init failed!\n");
+ return -1;
+ }
+
+ return 0;
+}
+#endif /* CONFIG_DRIVER_TI_EMAC */