davinci_emac: davinci_eth_set_mac_addr to ->write_hwaddr

This patch proposes to migrate the davinci_emac driver to using the
eth_device->write_hwaddr function pointer as suggested by Ben Warren.

All the davinci boards had the behaviour, prior to this patch, of
sync'ing the environment variable enetaddr with the MAC address read
from non-volatile storage on boot -- when the two locations disagreed,
the environment variable value took precendence. This patch keeps the
same behaviour but lets eth_initialize take care of it.

This patch refactors davinci_emac setup in the boards so that the MAC
address is read from non-volatile storage into the environment variable
and then the environment variable value is use in eth_intialize. The
only exception is the direct call to davinci_eth_set_mac_addr made by
the da830evm board init which was changed into an assignment of the
enetaddr field.

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Tested-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

2 files changed, 10 insertions, 33 deletions

diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c
index 86a875e..b60a46e 100644
--- a/board/davinci/common/misc.c
+++ b/board/davinci/common/misc.c
@@ -85,45 +85,22 @@ err:
 	return 0;
 }
 
-/* If there is a MAC address in the environment, and if it is not identical to
- * the MAC address in the EEPROM, then a warning is printed and the MAC address
- * from the environment is used.
- *
+/*
  * If there is no MAC address in the environment, then it will be initialized
  * (silently) from the value in the EEPROM.
  */
-void dv_configure_mac_address(uint8_t *rom_enetaddr)
+void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
 {
-	int i;
-	u_int8_t env_enetaddr[6];
-	char *tmp = getenv("ethaddr");
-	char *end;
-
-	/* Read Ethernet MAC address from the U-Boot environment.
-	 * If it is not defined, env_enetaddr[] will be cleared. */
-	for (i = 0; i < 6; i++) {
-		env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
-		if (tmp)
-			tmp = (*end) ? end+1 : end;
-	}
-
-	/* Check if EEPROM and U-Boot environment MAC addresses match. */
-	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
-	    memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
-		printf("Warning: MAC addresses don't match:\n");
-		printf("  EEPROM MAC address: %pM\n", rom_enetaddr);
-		printf("     \"ethaddr\" value: %pM\n", env_enetaddr) ;
-		debug("### Using MAC address from environment\n");
-	}
-	if (!tmp) {
-		char ethaddr[20];
+	uint8_t env_enetaddr[6];
 
+	eth_getenv_enetaddr_by_index(0, env_enetaddr);
+	if (!memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 		/* There is no MAC address in the environment, so we initialize
 		 * it from the value in the EEPROM. */
-		sprintf(ethaddr, "%pM", rom_enetaddr) ;
-		debug("### Setting environment from EEPROM MAC address = \"%s\"\n",
-		      ethaddr);
-		setenv("ethaddr", ethaddr);
+		debug("### Setting environment from EEPROM MAC address = "
+			"\"%pM\"\n",
+			env_enetaddr);
+		eth_setenv_enetaddr("ethaddr", rom_enetaddr);
 	}
 }
 
diff --git a/board/davinci/common/misc.h b/board/davinci/common/misc.h
index 329c369..a6ac3b9 100644
--- a/board/davinci/common/misc.h
+++ b/board/davinci/common/misc.h
@@ -46,7 +46,7 @@ struct pinmux_resource {
 			  }
 
 int dvevm_read_mac_address(uint8_t *buf);
-void dv_configure_mac_address(uint8_t *rom_enetaddr);
+void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr);
 int davinci_configure_pin_mux(const struct pinmux_config *pins, int n_pins);
 int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
 				    int n_items);