colibri_vf: add Toradex config block

Add support for Toardex specific config block. This data structure
is available on NAND and written at production time. Get MAC
address as well as serial number and board revision from this
structure.

2 files changed, 126 insertions, 0 deletions

diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c
index ddc3a34dbb7..0aaf299c75b 100644
--- a/board/toradex/colibri_vf/colibri_vf.c
+++ b/board/toradex/colibri_vf/colibri_vf.c
@@ -18,6 +18,8 @@
 #include <miiphy.h>
 #include <netdev.h>
 #include <i2c.h>
+#include <malloc.h>
+#include <nand.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -432,6 +434,125 @@ int board_early_init_f(void)
 	return 0;
 }
 
+unsigned char *config_block = NULL;
+
+int read_cfb(void)
+{
+	unsigned char toradex_oui[3] = { 0x00, 0x14, 0x2d };
+	unsigned char ethaddr[6];
+	unsigned char *cfb_ethaddr;
+	size_t size = 0x800;
+
+	/* Allocate RAM area for config block */
+	config_block = malloc(size);
+
+	/* Clear it */
+	memset((void *)config_block, 0, size);
+
+	/* Read production parameter config block from first NAND */
+	if (nand_read_skip_bad(&nand_info[0], CONFIG_TRDX_CFG_BLOCK_OFFSET,
+			&size, NULL, nand_info[0].size, config_block))
+		return 1;
+	cfb_ethaddr = config_block + 8;
+	if (memcmp(cfb_ethaddr, toradex_oui, 3)) {
+		memset((void *)config_block, 0, size);
+		return 2;
+	}
+
+	/*
+	 * Check if Environment contains a valid MAC address, set the one from
+	 * config block if not
+	 */
+	if (!eth_getenv_enetaddr("ethaddr", ethaddr))
+		eth_setenv_enetaddr("ethaddr", cfb_ethaddr);
+
+	return 0;
+}
+
+#ifdef CONFIG_REVISION_TAG
+u32 get_board_rev(void)
+{
+	int i;
+	unsigned short major = 0, minor = 0, release = 0;
+	size_t size = 2048;
+
+	if(config_block == NULL)
+		return 0;
+
+	/* Parse revision information in config block */
+	for (i = 0; i < (size - 8); i++) {
+		if (config_block[i] == 0x02 && config_block[i+1] == 0x40 &&
+				config_block[i+2] == 0x08) {
+			break;
+		}
+	}
+
+	/* Parse revision information in config block */
+	major = (config_block[i+3] << 8) | config_block[i+4];
+	minor = (config_block[i+5] << 8) | config_block[i+6];
+	release = (config_block[i+7] << 8) | config_block[i+8];
+
+	/* Check validity */
+	if (major)
+		return ((major & 0xff) << 8) | ((minor & 0xf) << 4) |
+			((release & 0xf) + 0xa);
+	else
+		return 0;
+}
+#endif
+
+#ifdef CONFIG_SERIAL_TAG
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+	int array[8];
+	int i;
+	unsigned int serial = 0;
+	unsigned int serial_offset = 11;
+
+	serialnr->low = 0;
+	serialnr->high = 0;
+
+	if (config_block == NULL)
+		return;
+
+	/* Get MAC address from config block */
+	memcpy(&serial, config_block + serial_offset, 3);
+	serial = ntohl(serial);
+	serial >>= 8;
+
+	/* Check validity */
+	if (serial) {
+		/* Convert to Linux serial number format (hexadecimal coded
+		 * decimal)
+		 */
+		i = 7;
+		while (serial) {
+			array[i--] = serial % 10;
+			serial /= 10;
+		}
+		while (i >= 0)
+			array[i--] = 0;
+		serial = array[0];
+		for (i = 1; i < 8; i++) {
+			serial *= 16;
+			serial += array[i];
+		}
+
+		serialnr->low = serial;
+	}
+}
+#endif
+
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	if (read_cfb())
+		printf("Missing Toradex config block\n");
+
+	return 0;
+}
+#endif
+
 int board_init(void)
 {
 	/* address of boot parameters */
diff --git a/include/configs/colibri_vf.h b/include/configs/colibri_vf.h
index 8af213c4065..09e841e2e30 100644
--- a/include/configs/colibri_vf.h
+++ b/include/configs/colibri_vf.h
@@ -99,6 +99,11 @@
 
 #define CONFIG_BOOTDELAY		3
 
+#define CONFIG_BOARD_LATE_INIT
+#define CONFIG_TRDX_CFG_BLOCK_OFFSET	0x800
+#define CONFIG_REVISION_TAG
+#define CONFIG_SERIAL_TAG
+
 #define CONFIG_LOADADDR			0x82000000
 #define CONFIG_SYS_TEXT_BASE		0x3f408000