sh: EcoVec24: write MAC address in boot

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 79 insertions, 2 deletions

diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index b44c06058e34..6cd1b782845f 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/usb/r8a66597.h>
+#include <linux/i2c.h>
 #include <video/sh_mobile_lcdc.h>
 #include <media/sh_mobile_ceu.h>
 #include <asm/heartbeat.h>
@@ -342,9 +343,77 @@ static struct platform_device *ecovec_devices[] __initdata = {
         &ceu1_device,
 };
 
+#define EEPROM_ADDR 0x50
+static u8 mac_read(struct i2c_adapter *a, u8 command)
+{
+        struct i2c_msg msg[2];
+        u8 buf;
+        int ret;
+
+        msg[0].addr  = EEPROM_ADDR;
+        msg[0].flags = 0;
+        msg[0].len   = 1;
+        msg[0].buf   = &command;
+
+        msg[1].addr  = EEPROM_ADDR;
+        msg[1].flags = I2C_M_RD;
+        msg[1].len   = 1;
+        msg[1].buf   = &buf;
+
+        ret = i2c_transfer(a, msg, 2);
+        if (ret < 0) {
+                printk(KERN_ERR "error %d\n", ret);
+                buf = 0xff;
+        }
+
+        return buf;
+}
+
+#define MAC_LEN 6
+static void __init sh_eth_init(void)
+{
+        struct i2c_adapter *a = i2c_get_adapter(1);
+        struct clk *eth_clk;
+        u8 mac[MAC_LEN];
+        int i;
+
+        if (!a) {
+                pr_err("can not get I2C 1\n");
+                return;
+        }
+
+        eth_clk = clk_get(NULL, "eth0");
+        if (!eth_clk) {
+                pr_err("can not get eth0 clk\n");
+                return;
+        }
+
+        /* read MAC address frome EEPROM */
+        for (i = 0; i < MAC_LEN; i++) {
+                mac[i] = mac_read(a, 0x10 + i);
+                msleep(10);
+        }
+
+        /* clock enable */
+        clk_enable(eth_clk);
+
+        /* reset sh-eth */
+        ctrl_outl(0x1, SH_ETH_ADDR + 0x0);
+
+        /* set MAC addr */
+        ctrl_outl((mac[0] << 24) |
+                  (mac[1] << 16) |
+                  (mac[2] <<  8) |
+                  (mac[3] <<  0), SH_ETH_MAHR);
+        ctrl_outl((mac[4] <<  8) |
+                  (mac[5] <<  0), SH_ETH_MALR);
+
+        clk_put(eth_clk);
+}
+
 #define PORT_HIZA 0xA4050158
 #define IODRIVEA  0xA405018A
-static int __init devices_setup(void)
+static int __init arch_setup(void)
 {
         /* enable SCIFA0 */
         gpio_request(GPIO_FN_SCIF0_TXD, NULL);
@@ -521,7 +590,15 @@ static int __init devices_setup(void)
         return platform_add_devices(ecovec_devices,
                                     ARRAY_SIZE(ecovec_devices));
 }
-arch_initcall(devices_setup);
+arch_initcall(arch_setup);
+
+static int __init devices_setup(void)
+{
+        sh_eth_init();
+        return 0;
+}
+device_initcall(devices_setup);
+
 
 static struct sh_machine_vector mv_ecovec __initmv = {
         .mv_name        = "R0P7724 (EcoVec)",