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cm-t54: add EEPROM support and MAC address handling

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cm-t54 Eth MAC address is stored in onboard EEPROM.
Add EEPROM support and setup stored Eth MAC address.

If EEPROM does not contain a valid MAC, then generate it from the
processor ID code (reference code is taken from OMAP5 uEvm board file).

Modify Device Tree blob MAC address field with retrieved data.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
This commit is contained in:
Dmitry Lifshitz 2014-04-27 13:18:46 +03:00 committed by Tom Rini
parent 076446f106
commit a9375f3328
2 changed files with 72 additions and 0 deletions
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63
board/compulab/cm_t54/cm_t54.c
View File

@ -9,6 +9,7 @@
*/
#include <common.h>
#include <fdt_support.h>
#include <usb.h>
#include <mmc.h>
#include <palmas.h>
@ -20,6 +21,8 @@
#include <asm/arch/ehci.h>
#include <asm/ehci-omap.h>
#include "../common/eeprom.h"
#define DIE_ID_REG_BASE (OMAP54XX_L4_CORE_BASE + 0x2000)
#define DIE_ID_REG_OFFSET 0x200
@ -99,6 +102,66 @@ int board_mmc_init(bd_t *bis)
}
#endif
#ifdef CONFIG_USB_HOST_ETHER
void ft_board_setup(void *blob, bd_t *bd)
{
uint8_t enetaddr[6];
/* MAC addr */
if (eth_getenv_enetaddr("usbethaddr", enetaddr)) {
fdt_find_and_setprop(blob, "/smsc95xx@0", "mac-address",
enetaddr, 6, 1);
}
}
static void generate_mac_addr(uint8_t *enetaddr)
{
int reg;
reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
/*
* create a fake MAC address from the processor ID code.
* first byte is 0x02 to signify locally administered.
*/
enetaddr[0] = 0x02;
enetaddr[1] = readl(reg + 0x10) & 0xff;
enetaddr[2] = readl(reg + 0xC) & 0xff;
enetaddr[3] = readl(reg + 0x8) & 0xff;
enetaddr[4] = readl(reg) & 0xff;
enetaddr[5] = (readl(reg) >> 8) & 0xff;
}
/*
* Routine: handle_mac_address
* Description: prepare MAC address for on-board Ethernet.
*/
static int handle_mac_address(void)
{
uint8_t enetaddr[6];
int ret;
ret = eth_getenv_enetaddr("usbethaddr", enetaddr);
if (ret)
return 0;
ret = cl_eeprom_read_mac_addr(enetaddr);
if (!ret || !is_valid_ether_addr(enetaddr))
generate_mac_addr(enetaddr);
if (!is_valid_ether_addr(enetaddr))
return -1;
return eth_setenv_enetaddr("usbethaddr", enetaddr);
}
int board_eth_init(bd_t *bis)
{
return handle_mac_address();
}
#endif
#ifdef CONFIG_USB_EHCI
static struct omap_usbhs_board_data usbhs_bdata = {
.port_mode[0] = OMAP_USBHS_PORT_MODE_UNUSED,

9
include/configs/cm_t54.h
View File

@ -19,6 +19,15 @@
#undef CONFIG_MISC_INIT_R
#undef CONFIG_SPL_OS_BOOT
/* Device Tree defines */
#define CONFIG_OF_LIBFDT
#define CONFIG_OF_BOARD_SETUP
/* EEPROM related defines */
#define CONFIG_SYS_I2C_OMAP34XX
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
/* Enable SD/MMC CD and WP GPIOs */
#define OMAP_HSMMC_USE_GPIO