AM35xx: add EMAC support

AM35xx has DaVinci-compatible EMAC.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>

arch/arm/cpu/armv7/omap3/Makefile

@@ -32,6 +32,7 @@ COBJS	+= clock.o
 COBJS	+= mem.o
 COBJS	+= sys_info.o
 
+COBJS-$(CONFIG_DRIVER_TI_EMAC)	+= emac.o
 COBJS-$(CONFIG_EMIF4)	+= emif4.o
 COBJS-$(CONFIG_SDRC)	+= sdrc.o
 

arch/arm/cpu/armv7/omap3/emac.c

@@ -0,0 +1,44 @@
+/*
+ *
+ * DaVinci EMAC initialization.
+ *
+ * (C) Copyright 2011, Ilya Yanok, Emcraft Systems
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <common.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <asm/arch/am35x_def.h>
+
+/*
+ * Initializes on-chip ethernet controllers.
+ * to override, implement board_eth_init()
+ */
+int cpu_eth_init(bd_t *bis)
+{
+	u32 reset;
+
+	/* ensure that the module is out of reset */
+	reset = readl(&am35x_scm_general_regs->ip_sw_reset);
+	reset &= ~CPGMACSS_SW_RST;
+	writel(reset, &am35x_scm_general_regs->ip_sw_reset);
+
+	return davinci_emac_initialize();
+}