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>
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 41a9910..e06896f 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -65,21 +65,6 @@
davinci_eth_mdio_enable();
}
-static u_int8_t davinci_eth_mac_addr[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
-
-/*
- * This function must be called before emac_open() if you want to override
- * the default mac address.
- */
-void davinci_eth_set_mac_addr(const u_int8_t *addr)
-{
- int i;
-
- for (i = 0; i < sizeof (davinci_eth_mac_addr); i++) {
- davinci_eth_mac_addr[i] = addr[i];
- }
-}
-
/* EMAC Addresses */
static volatile emac_regs *adap_emac = (emac_regs *)EMAC_BASE_ADDR;
static volatile ewrap_regs *adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
@@ -100,6 +85,43 @@
phy_t phy;
+static int davinci_eth_set_mac_addr(struct eth_device *dev)
+{
+ unsigned long mac_hi;
+ unsigned long mac_lo;
+
+ /*
+ * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
+ * receive)
+ * Using channel 0 only - other channels are disabled
+ * */
+ writel(0, &adap_emac->MACINDEX);
+ mac_hi = (dev->enetaddr[3] << 24) |
+ (dev->enetaddr[2] << 16) |
+ (dev->enetaddr[1] << 8) |
+ (dev->enetaddr[0]);
+ mac_lo = (dev->enetaddr[5] << 8) |
+ (dev->enetaddr[4]);
+
+ writel(mac_hi, &adap_emac->MACADDRHI);
+#if defined(DAVINCI_EMAC_VERSION2)
+ writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
+ &adap_emac->MACADDRLO);
+#else
+ writel(mac_lo, &adap_emac->MACADDRLO);
+#endif
+
+ writel(0, &adap_emac->MACHASH1);
+ writel(0, &adap_emac->MACHASH2);
+
+ /* Set source MAC address - REQUIRED */
+ writel(mac_hi, &adap_emac->MACSRCADDRHI);
+ writel(mac_lo, &adap_emac->MACSRCADDRLO);
+
+
+ return 0;
+}
+
static void davinci_eth_mdio_enable(void)
{
u_int32_t clkdiv;
@@ -286,8 +308,6 @@
dv_reg_p addr;
u_int32_t clkdiv, cnt;
volatile emac_desc *rx_desc;
- unsigned long mac_hi;
- unsigned long mac_lo;
debug_emac("+ emac_open\n");
@@ -311,30 +331,7 @@
writel(1, &adap_emac->TXCONTROL);
writel(1, &adap_emac->RXCONTROL);
- /* Set MAC Addresses & Init multicast Hash to 0 (disable any multicast receive) */
- /* Using channel 0 only - other channels are disabled */
- writel(0, &adap_emac->MACINDEX);
- mac_hi = (davinci_eth_mac_addr[3] << 24) |
- (davinci_eth_mac_addr[2] << 16) |
- (davinci_eth_mac_addr[1] << 8) |
- (davinci_eth_mac_addr[0]);
- mac_lo = (davinci_eth_mac_addr[5] << 8) |
- (davinci_eth_mac_addr[4]);
-
- writel(mac_hi, &adap_emac->MACADDRHI);
-#if defined(DAVINCI_EMAC_VERSION2)
- writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
- &adap_emac->MACADDRLO);
-#else
- writel(mac_lo, &adap_emac->MACADDRLO);
-#endif
-
- writel(0, &adap_emac->MACHASH1);
- writel(0, &adap_emac->MACHASH2);
-
- /* Set source MAC address - REQUIRED */
- writel(mac_hi, &adap_emac->MACSRCADDRHI);
- writel(mac_lo, &adap_emac->MACSRCADDRLO);
+ davinci_eth_set_mac_addr(dev);
/* Set DMA 8 TX / 8 RX Head pointers to 0 */
addr = &adap_emac->TX0HDP;
@@ -636,6 +633,7 @@
dev->halt = davinci_eth_close;
dev->send = davinci_eth_send_packet;
dev->recv = davinci_eth_rcv_packet;
+ dev->write_hwaddr = davinci_eth_set_mac_addr;
eth_register(dev);