SAMSUNG: SMDKC100: Adds ethernet support.

Add setup for ethernet on SMDKC100, allowing kernel/ramdisk to be
loaded over tftp.

The preinit function will configure GPIO (GPK0CON) & SROMC to look
for environment in SROM Bank 3.

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

board/samsung/smdkc100/smdkc100.c

@@ -23,10 +23,40 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
+#include <asm/arch/smc.h>
+#include <asm/arch/gpio.h>
+#include <netdev.h>
+
 DECLARE_GLOBAL_DATA_PTR;
 
+/*
+ * Miscellaneous platform dependent initialisations
+ */
+static void smc9115_pre_init(void)
+{
+	u32 smc_bw_conf, smc_bc_conf;
+
+	struct s5pc100_gpio *const gpio =
+		(struct s5pc100_gpio *)S5PC100_GPIO_BASE;
+
+	/* gpio configuration GPK0CON */
+	gpio_cfg_pin(&gpio->gpio_k0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
+
+	/* Ethernet needs bus width of 16 bits */
+	smc_bw_conf = SMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
+	smc_bc_conf = SMC_BC_TACS(0x0) | SMC_BC_TCOS(0x4) | SMC_BC_TACC(0xe)
+			| SMC_BC_TCOH(0x1) | SMC_BC_TAH(0x4)
+			| SMC_BC_TACP(0x6) | SMC_BC_PMC(0x0);
+
+	/* Select and configure the SROMC bank */
+	s5pc1xx_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, smc_bc_conf);
+}
+
 int board_init(void)
 {
+	smc9115_pre_init();
+
 	gd->bd->bi_arch_number = MACH_TYPE_SMDKC100;
 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 
@@ -49,3 +79,12 @@ int checkboard(void)
 	return 0;
 }
 #endif
+
+int board_eth_init(bd_t *bis)
+{
+	int rc = 0;
+#ifdef CONFIG_SMC911X
+	rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
+#endif
+	return rc;
+}

include/configs/smdkc100.h

@@ -83,7 +83,6 @@
 #undef CONFIG_CMD_FLASH
 #undef CONFIG_CMD_IMLS
 #undef CONFIG_CMD_NAND
-#undef CONFIG_CMD_NET
 
 #define CONFIG_CMD_CACHE
 #define CONFIG_CMD_REGINFO
@@ -235,4 +234,15 @@
 
 #define CONFIG_DOS_PARTITION		1
 
+/*
+ * Ethernet Contoller driver
+ */
+#ifdef CONFIG_CMD_NET
+#define CONFIG_NET_MULTI
+#define CONFIG_SMC911X         1       /* we have a SMC9115 on-board   */
+#define CONFIG_SMC911X_16_BIT  1       /* SMC911X_16_BIT Mode          */
+#define CONFIG_SMC911X_BASE    0x98800300      /* SMC911X Drive Base   */
+#define CONFIG_ENV_SROM_BANK   3       /* Select SROM Bank-3 for Ethernet*/
+#endif /* CONFIG_CMD_NET */
+
 #endif	/* __CONFIG_H */