[U-Boot] [PATCH 3/6] board/BuR/common: add 'brdefaulip_setup' function

[Hannes Schmelzer <hannes.schmelzer@br-automation.com>]

Many B&R boards are equipped with an I2C-EEPROM where various
information can be stored.

Today there is only a single byte for 'board_id' used.

We write this 'board_id' into environment for later use during boot.

If the value != 0xFF, meaning the byte is programmed, we modify the
"brdefaultip" environment variable for setting an IP-Address based on
board_id.

Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
---

 board/BuR/common/bur_common.h |  2 ++
 board/BuR/common/common.c     | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/board/BuR/common/bur_common.h b/board/BuR/common/bur_common.h
index f743194..2591bf4 100644
--- a/board/BuR/common/bur_common.h
+++ b/board/BuR/common/bur_common.h
@@ -21,4 +21,6 @@ void enable_i2c_pin_mux(void);
 void enable_board_pin_mux(void);
 int board_eth_init(bd_t *bis);
 
+int brdefaultip_setup(int bus, int chip);
+
 #endif
diff --git a/board/BuR/common/common.c b/board/BuR/common/common.c
index 28ebb84..89087d7 100644
--- a/board/BuR/common/common.c
+++ b/board/BuR/common/common.c
@@ -266,6 +266,40 @@ int ft_board_setup(void *blob, bd_t *bd)
 	return 0;
 }
 
+int brdefaultip_setup(int bus, int chip)
+{
+	int rc;
+	struct udevice *i2cdev;
+	u8 u8buf = 0;
+	char defip[256] = { 0 };
+
+	rc = i2c_get_chip_for_busnum(bus, chip, 2, &i2cdev);
+	if (rc != 0) {
+		printf("WARN: cannot probe baseboard EEPROM!\n");
+		return -1;
+	}
+
+	rc = dm_i2c_read(i2cdev, 0, &u8buf, 1);
+	if (rc != 0) {
+		printf("WARN: cannot read baseboard EEPROM!\n");
+		return -1;
+	}
+
+	if (u8buf != 0xFF)
+		snprintf(defip, sizeof(defip),
+			 "if test -r ${ipaddr}; then; else setenv ipaddr 192.168.60.%d; setenv serverip 192.168.60.254; setenv gatewayip 192.168.60.254; setenv netmask 255.255.255.0; fi;",
+			 u8buf);
+	else
+		strncpy(defip,
+			"if test -r ${ipaddr}; then; else setenv ipaddr 192.168.60.1; setenv serverip 192.168.60.254; setenv gatewayip 192.168.60.254; setenv netmask 255.255.255.0; fi;",
+			sizeof(defip));
+
+	env_set("brdefaultip", defip);
+	env_set_hex("board_id", u8buf);
+
+	return 0;
+}
+
 int overwrite_console(void)
 {
 	return 1;
-- 
2.7.4