[U-Boot] [PATCH] da850: add support to read mac address from spi flash

nagabhushana.netagunte at ti.com
2011-07-28T16:25:29Z

From: Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>

add misc_int_r function to read the mac address from SPI flash
if env variable ethaddr is not set.

Signed-off-by: Prakash PM <prakash.pm@ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>
---
board/davinci/da8xxevm/da850evm.c | 65 +++++++++++++++++++++++++++++++++++++
include/configs/da850evm.h | 1 +
2 files changed, 66 insertions(+), 0 deletions(-)

diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index a77e438..8d09bb9 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -25,10 +25,13 @@
#include <i2c.h>
#include <net.h>
#include <netdev.h>
+#include <spi.h>
+#include <spi_flash.h>
#include <asm/arch/hardware.h>
#include <asm/arch/emif_defs.h>
#include <asm/arch/emac_defs.h>
#include <asm/io.h>
+#include <asm/errno.h>
#include <asm/arch/davinci_misc.h>

DECLARE_GLOBAL_DATA_PTR;
@@ -383,4 +386,66 @@ int board_eth_init(bd_t *bis)

return 0;
}
+
#endif /* CONFIG_DRIVER_TI_EMAC */
+
+#define CFG_MAC_ADDR_SPI_BUS 0
+#define CFG_MAC_ADDR_SPI_CS 0
+#define CFG_MAC_ADDR_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
+#define CFG_MAC_ADDR_SPI_MODE SPI_MODE_3
+
+#define CFG_MAC_ADDR_OFFSET (flash->size - SZ_64K)
+
+static int get_mac_addr(u8 *addr)
+{
+ int ret;
+ struct spi_flash *flash;
+
+ flash = spi_flash_probe(CFG_MAC_ADDR_SPI_BUS, CFG_MAC_ADDR_SPI_CS,
+ CFG_MAC_ADDR_SPI_MAX_HZ, CFG_MAC_ADDR_SPI_MODE);
+ if (!flash) {
+ printf(" Error - unable to probe SPI flash.\n");
+ ret = -1;
+ goto err_probe;
+ }
+
+ ret = spi_flash_read(flash, CFG_MAC_ADDR_OFFSET, 6, addr);
+ if (ret) {
+ printf("Error - unable to read MAC address from SPI flash.\n");
+ goto err_read;
+ }
+
+err_read:
+ /* cannot call free currently since the free function calls free() for
+ * spi_flash structure though it is not directly allocated through
+ * malloc()
+ */
+err_probe:
+ return ret;
+}
+
+int misc_init_r(void)
+{
+ uint8_t tmp[20], addr[10];
+ int ret;
+
+ printf("ARM Clock : %d Hz\n", clk_get(DAVINCI_ARM_CLKID));
+
+ if (getenv("ethaddr") == NULL) {
+ /* Set Ethernet MAC address from EEPROM */
+ ret = get_mac_addr(addr);
+ if (ret != 0)
+ return -EINVAL;
+
+ if (is_multicast_ether_addr(addr) || is_zero_ether_addr(addr)) {
+ printf("Invalid MAC address read.\n");
+ return -EINVAL;
+ }
+ sprintf((char *)tmp, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0],
+ addr[1], addr[2], addr[3], addr[4], addr[5]);
+
+ setenv("ethaddr", (char *)tmp);
+ }
+
+ return 0;
+}
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index 21d8fe3..f7bf6be 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -161,6 +161,7 @@
/*
* U-Boot general configuration
*/
+#define CONFIG_MISC_INIT_R
#define CONFIG_BOOTFILE "uImage" /* Boot file name */
#define CONFIG_SYS_PROMPT "U-Boot > " /* Command Prompt */
#define CONFIG_SYS_CBSIZE 1024 /* Console I/O Buffer Size */
--
1.6.2.4