x86: quark: Enable on-chip ethernet controllers

Intel Quark SoC integrates two 10/100 ethernet controllers which can
be connected to an external RMII PHY. The MAC IP is from Designware.
Enable this support with the existing U-Boot Designware MAC driver
so that the ethernet port on Intel Galileo board can be used.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/quark/quark.c

@@ -6,6 +6,8 @@
 
 #include <common.h>
 #include <mmc.h>
+#include <netdev.h>
+#include <phy.h>
 #include <asm/io.h>
 #include <asm/pci.h>
 #include <asm/post.h>
@@ -116,3 +118,20 @@ int cpu_mmc_init(bd_t *bis)
 	return pci_mmc_init("Quark SDHCI", mmc_supported,
 			    ARRAY_SIZE(mmc_supported));
 }
+
+int cpu_eth_init(bd_t *bis)
+{
+	u32 base;
+	int ret0, ret1;
+
+	pci_read_config_dword(QUARK_EMAC0, PCI_BASE_ADDRESS_0, &base);
+	ret0 = designware_initialize(base, PHY_INTERFACE_MODE_RMII);
+
+	pci_read_config_dword(QUARK_EMAC1, PCI_BASE_ADDRESS_0, &base);
+	ret1 = designware_initialize(base, PHY_INTERFACE_MODE_RMII);
+
+	if (ret0 < 0 && ret1 < 0)
+		return -1;
+	else
+		return 0;
+}

include/configs/galileo.h

@@ -57,4 +57,9 @@
 #define CONFIG_MMC_SDMA
 #define CONFIG_CMD_MMC
 
+/* 10/100M Ethernet support */
+#define CONFIG_DESIGNWARE_ETH
+#define CONFIG_DW_ALTDESCRIPTOR
+#define CONFIG_PHYLIB
+
 #endif	/* __CONFIG_H */