[U-Boot] [PATCH] da850evm: basic MII EMAC support

[Ben Gardiner <bengardiner@nanometrics.ca>]

The current da850evm support in u-boot/master [1] omits any use of
the davinci EMAC. This patch adds basic support for the EMAC using
the MII PHY found on the baseboard of the EVM. The MAC address is
read from the environment variable 'ethadd'. Note that this is
different from the da850evm support in the u-boot omapl1 tree
where the MAC address is read from SPI flash [2].

CC: Sandeep Paulraj <s-paulraj@ti.com>
CC: Sudhakar Rajashekhara <sudhakar.raj@ti.com>

[1] http://git.denx.de/?p=u-boot.git
[2] http://arago-project.org/git/projects/?p=u-boot-omapl1.git

---

I am submitting this patch for inclusion in v2010.12, not v2010.09 since it
introduces a new feature.

---
 board/davinci/da8xxevm/da850evm.c |   60 +++++++++++++++++++++++++++++++++++++
 include/configs/da850evm.h        |   15 +++++++++
 2 files changed, 75 insertions(+), 0 deletions(-)

diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index eeb456c..30645e5 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -23,7 +23,11 @@
 
 #include <common.h>
 #include <i2c.h>
+#include <net.h>
+#include <netdev.h>
 #include <asm/arch/hardware.h>
+#include <asm/arch/emif_defs.h>
+#include <asm/arch/emac_defs.h>
 #include <asm/io.h>
 #include "../common/misc.h"
 #include "common.h"
@@ -48,6 +52,28 @@ static const struct pinmux_config uart_pins[] = {
 	{ pinmux(4), 2, 5 }
 };
 
+#ifdef CONFIG_DRIVER_TI_EMAC
+const struct pinmux_config emac_pins[] = {
+	{ pinmux(2), 8, 1 },
+	{ pinmux(2), 8, 2 },
+	{ pinmux(2), 8, 3 },
+	{ pinmux(2), 8, 4 },
+	{ pinmux(2), 8, 5 },
+	{ pinmux(2), 8, 6 },
+	{ pinmux(2), 8, 7 },
+	{ pinmux(3), 8, 0 },
+	{ pinmux(3), 8, 1 },
+	{ pinmux(3), 8, 2 },
+	{ pinmux(3), 8, 3 },
+	{ pinmux(3), 8, 4 },
+	{ pinmux(3), 8, 5 },
+	{ pinmux(3), 8, 6 },
+	{ pinmux(3), 8, 7 },
+	{ pinmux(4), 8, 0 },
+	{ pinmux(4), 8, 1 }
+};
+#endif /* CONFIG_DRIVER_TI_EMAC */
+
 /* I2C pin muxer settings */
 static const struct pinmux_config i2c_pins[] = {
 	{ pinmux(4), 2, 2 },
@@ -102,6 +128,14 @@ int board_init(void)
 	if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
 		return 1;
 
+#ifdef CONFIG_DRIVER_TI_EMAC
+	if (davinci_configure_pin_mux(emac_pins, ARRAY_SIZE(emac_pins)) != 0)
+		return 1;
+	/* set cfgchip3 to select MII */
+	writel(readl(&davinci_syscfg_regs->cfgchip3) & ~(1 << 8),
+			     &davinci_syscfg_regs->cfgchip3);
+#endif /* CONFIG_DRIVER_TI_EMAC */
+
 	/* enable the console UART */
 	writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
 		DAVINCI_UART_PWREMU_MGMT_UTRST),
@@ -109,3 +143,29 @@ int board_init(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_DRIVER_TI_EMAC
+
+/*
+ * Initializes on-board ethernet controllers.
+ */
+int board_eth_init(bd_t *bis)
+{
+	u_int8_t mac_addr[6];
+
+	/* read the address from env */
+	if (!eth_getenv_enetaddr("ethaddr", mac_addr))
+		return -1;
+
+	/* provide the resulting addr to the driver */
+	davinci_eth_set_mac_addr(mac_addr);
+
+	/* finally, initialise the driver */
+	if (!davinci_emac_initialize()) {
+		printf("Error: Ethernet init failed!\n");
+		return -1;
+	}
+
+	return 0;
+}
+#endif /* CONFIG_DRIVER_TI_EMAC */
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index 357715d..432c5e6 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -26,6 +26,7 @@
 /*
  * Board
  */
+#define CONFIG_DRIVER_TI_EMAC
 
 /*
  * SoC Configuration
@@ -79,6 +80,20 @@
 #define CONFIG_SYS_I2C_SLAVE		10 /* Bogus, master-only in U-Boot */
 
 /*
+ * Network & Ethernet Configuration
+ */
+#ifdef CONFIG_DRIVER_TI_EMAC
+#define CONFIG_EMAC_MDIO_PHY_NUM	0
+#define CONFIG_MII
+#define CONFIG_BOOTP_DEFAULT
+#define CONFIG_BOOTP_DNS
+#define CONFIG_BOOTP_DNS2
+#define CONFIG_BOOTP_SEND_HOSTNAME
+#define CONFIG_NET_RETRY_COUNT	10
+#define CONFIG_NET_MULTI
+#endif
+
+/*
  * U-Boot general configuration
  */
 #define CONFIG_BOOTFILE		"uImage" /* Boot file name */
-- 
1.7.0.4