diff options
Diffstat (limited to 'board/davinci/da8xxevm/da850evm.c')
| -rw-r--r-- | board/davinci/da8xxevm/da850evm.c | 112 |
1 files changed, 108 insertions, 4 deletions
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c index 8c9ff7c..291757c 100644 --- a/board/davinci/da8xxevm/da850evm.c +++ b/board/davinci/da8xxevm/da850evm.c @@ -54,6 +54,15 @@ static const struct pinmux_config uart_pins[] = { #ifdef CONFIG_DRIVER_TI_EMAC static const struct pinmux_config emac_pins[] = { +#ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII + { pinmux(14), 8, 2 }, + { pinmux(14), 8, 3 }, + { pinmux(14), 8, 4 }, + { pinmux(14), 8, 5 }, + { pinmux(14), 8, 6 }, + { pinmux(14), 8, 7 }, + { pinmux(15), 8, 1 }, +#else /* ! CONFIG_DRIVER_TI_EMAC_USE_RMII */ { pinmux(2), 8, 1 }, { pinmux(2), 8, 2 }, { pinmux(2), 8, 3 }, @@ -69,10 +78,10 @@ static const struct pinmux_config emac_pins[] = { { pinmux(3), 8, 5 }, { pinmux(3), 8, 6 }, { pinmux(3), 8, 7 }, +#endif /* CONFIG_DRIVER_TI_EMAC_USE_RMII */ { pinmux(4), 8, 0 }, { pinmux(4), 8, 1 } }; -#endif /* CONFIG_DRIVER_TI_EMAC */ /* I2C pin muxer settings */ static const struct pinmux_config i2c_pins[] = { @@ -99,6 +108,13 @@ const struct pinmux_config nand_pins[] = { }; #endif +#ifdef CONFIG_DRIVER_TI_EMAC_USE_RMII +#define HAS_RMII 1 +#else +#define HAS_RMII 0 +#endif +#endif /* CONFIG_DRIVER_TI_EMAC */ + static const struct pinmux_resource pinmuxes[] = { #ifdef CONFIG_SPI_FLASH PINMUX_ITEM(spi1_pins), @@ -203,9 +219,8 @@ int board_init(void) #ifdef CONFIG_DRIVER_TI_EMAC if (davinci_configure_pin_mux(emac_pins, ARRAY_SIZE(emac_pins)) != 0) return 1; - /* set cfgchip3 to select MII */ - writel(readl(&davinci_syscfg_regs->cfgchip3) & ~(1 << 8), - &davinci_syscfg_regs->cfgchip3); + + da850_emac_mii_mode_sel(HAS_RMII); #endif /* CONFIG_DRIVER_TI_EMAC */ /* enable the console UART */ @@ -218,11 +233,100 @@ int board_init(void) #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; |