[U-Boot] [PATCH 3/3] SAMSUNG: SMDKC100: Adds ethernet support.

[Naveen Krishna Ch]

From: Naveen Krishna CH <chnaveen at chnaveen.localdomain>

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 at samsung.com>
---

Changes since V1: 

1. The CONFIG_BOOTP* and Net config Macros are removed from config header.
Comments from Ben Warren are fixed
2. The GPIO configuration is modified & Macro and Function are renamed.
Comments from Minkyu Kang are fixed

 board/samsung/smdkc100/smdkc100.c |   38 +++++++++++++++++++++++++++++++++++++
 include/configs/smdkc100.h        |   13 +++++++++++-
 2 files changed, 50 insertions(+), 1 deletions(-)

diff --git a/board/samsung/smdkc100/smdkc100.c b/board/samsung/smdkc100/smdkc100.c
index 15a1a27..43af5ea 100644
--- a/board/samsung/smdkc100/smdkc100.c
+++ b/board/samsung/smdkc100/smdkc100.c
@@ -23,10 +23,39 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
+#include <asm/arch/smc.h>
+#include <asm/arch/gpio.h>
+
 DECLARE_GLOBAL_DATA_PTR;
 
+/*
+ * Miscellaneous platform dependent initialisations
+ */
+static void smc9115_pre_init(void)
+{
+	u32 tmp;
+	u32 smc_bw_conf;
+	struct s5pc100_gpio *const gpio =
+		(struct s5pc100_gpio *)S5PC100_GPIO_BASE;
+
+	/* gpio configuration GPK0CON */
+	tmp = __raw_readl(&gpio->gpio_k0.con);
+	tmp &= ~(0xf << CONFIG_ENV_SROM_BANK * 4);
+	tmp |=  (0x2 << CONFIG_ENV_SROM_BANK * 4);
+	__raw_writel(tmp, &gpio->gpio_k0.con);
+
+	/* Ethernet needs bus width of 16 bits */
+	smc_bw_conf = SMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
+
+	/* Select and configure the SROMC bank */
+	s5pc1xx_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, SMC_BC_CON);
+}
+
 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 +78,12 @@ 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;
+}
diff --git a/include/configs/smdkc100.h b/include/configs/smdkc100.h
index a8ba052..f7cfc5e 100644
--- a/include/configs/smdkc100.h
+++ b/include/configs/smdkc100.h
@@ -83,7 +83,7 @@
 #undef CONFIG_CMD_FLASH
 #undef CONFIG_CMD_IMLS
 #undef CONFIG_CMD_NAND
-#undef CONFIG_CMD_NET
+#define CONFIG_CMD_NET         /* bootp, tftpboot, rarpboot */
 
 #define CONFIG_CMD_CACHE
 #define CONFIG_CMD_REGINFO
@@ -235,4 +235,15 @@
 
 #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 */
-- 
1.6.6