[U-Boot] [PATCH v2] TI: DaVinci DM365: Enabling network Support on DM365 EVM

[Tom]

s-paulraj at ti.com wrote:
> From: Sandeep Paulraj <s-paulraj at ti.com>
> 
> This patch enables EMAC on the DM365 EVM.
> 
> Signed-off-by: Sandeep Paulraj <s-paulraj at ti.com>
> ---
> Changes since v1 include using a memory map to manipulate GPIO registers.
> This was suggested by Wolfgang.
> When compiling with this patch DM365 will still give compilation issues as i have
> to send an update to the EMAC driver for DM365. Patch to follow.
>  board/davinci/dm365evm/dm365evm.c |   43 +++++++++++++++++++++++++++++++++++++
>  1 files changed, 43 insertions(+), 0 deletions(-)
> 
> diff --git a/board/davinci/dm365evm/dm365evm.c b/board/davinci/dm365evm/dm365evm.c
> index 99392b3..efd4713 100644
> --- a/board/davinci/dm365evm/dm365evm.c
> +++ b/board/davinci/dm365evm/dm365evm.c
> @@ -17,9 +17,12 @@
>  
>  #include <common.h>
>  #include <nand.h>
> +#include <asm/io.h>
>  #include <asm/arch/hardware.h>
>  #include <asm/arch/emif_defs.h>
>  #include <asm/arch/nand_defs.h>
> +#include <asm/arch/gpio_defs.h>
> +#include <netdev.h>
>  #include "../common/misc.h"
>  
>  DECLARE_GLOBAL_DATA_PTR;
> @@ -32,6 +35,46 @@ int board_init(void)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_DRIVER_TI_EMAC
> +int board_eth_init(bd_t *bis)
> +{
> +	uint8_t eeprom_enetaddr[6];
> +	int i;
> +	struct davinci_gpio *gpio1_base =
> +			(struct davinci_gpio *)DAVINCI_GPIO_BANK01;
> +
> +	/* Configure PINMUX 3 to enable EMAC pins */
> +	writel((readl(PINMUX3) | 0x1affff), PINMUX3);
> +
> +	/* Configure GPIO20 as output */
> +	writel((readl(&gpio1_base->dir) & 0xffefffff), &gpio1_base->dir);
> +
> +	/* Toggle GPIO 20 */
> +	for (i = 0; i < 20; i++) {
> +		/* GPIO 20 low */
> +		writel((readl(&gpio1_base->out_data) & 0xffefffff),
> +						&gpio1_base->out_data);
> +
> +		udelay(1000);
> +
> +		/* GPIO 20 high */
> +		writel((readl(&gpio1_base->out_data) | 0x00100000),
> +						&gpio1_base->out_data);
> +	}

You may want to convert the constants from
0xffeffff -> ~(1 << 20)
0x0010000 -> (1 << 20)
or bit = 20; (1 << bit)
Up to you.

Fine otherwise.
Tom

> +
> +	/* Configure I2C pins so that EEPROM can be read */
> +	writel((readl(PINMUX3) | 0x01400000), PINMUX3);
> +
> +	/* Read Ethernet MAC address from EEPROM */
> +	if (dvevm_read_mac_address(eeprom_enetaddr))
> +		dv_configure_mac_address(eeprom_enetaddr);
> +
> +	davinci_emac_initialize();
> +
> +	return 0;
> +}
> +#endif
> +
>  #ifdef CONFIG_NAND_DAVINCI
>  static void nand_dm365evm_select_chip(struct mtd_info *mtd, int chip)
>  {