From 5ac6f1a430e370828947a8342778c751bf0cb476 Mon Sep 17 00:00:00 2001
From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Date: Thu, 23 Oct 2014 09:52:22 +0200
Subject: toradex: add common config block code

Add common confg block hanlding. The config block is a Toradex
specific data structure containing manufacturing data and static
module information such as ethernet address.
---
 board/toradex/common/configblock.c | 161 +++++++++++++++++++++++++++++++++++++
 board/toradex/common/configblock.h |   9 +++
 2 files changed, 170 insertions(+)
 create mode 100644 board/toradex/common/configblock.c
 create mode 100644 board/toradex/common/configblock.h

diff --git a/board/toradex/common/configblock.c b/board/toradex/common/configblock.c
new file mode 100644
index 0000000000..5d28bc7d38
--- /dev/null
+++ b/board/toradex/common/configblock.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (c) 2011-2014 Toradex, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+#include <malloc.h>
+#include <mmc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_REVISION_TAG) || defined(CONFIG_SERIAL_TAG) || defined(CONFIG_TRDX_CFG_BLOCK)
+unsigned char *config_block = NULL;
+#endif
+
+#ifdef CONFIG_REVISION_TAG
+u32 get_board_rev(void)
+{
+	int i;
+	unsigned short major = 0, minor = 0, release = 0;
+	size_t size = CONFIG_TRDX_CFG_BLOCK_SIZE;
+
+	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 /* CONFIG_REVISION_TAG */
+
+#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 /* CONFIG_SERIAL_TAG */
+
+#ifdef CONFIG_TRDX_CFG_BLOCK
+int read_trdx_cfg_block(void)
+{
+	size_t size = CONFIG_TRDX_CFG_BLOCK_SIZE;
+#ifdef CONFIG_TRDX_CFG_BLOCK_IS_IN_MMC
+	struct mmc *mmc;
+	int dev = CONFIG_TRDX_CFG_BLOCK_DEV;
+	uint part = CONFIG_TRDX_CFG_BLOCK_PART;
+	uint blk_start;
+#endif /* CONFIG_TRDX_CFG_BLOCK_IS_IN_MMC */
+	int offset = CONFIG_TRDX_CFG_BLOCK_OFFSET;
+	unsigned char *cfg_block_ethaddr;
+	unsigned char toradex_oui[3] = { 0x00, 0x14, 0x2d };
+	unsigned char ethaddr[6];
+
+	/* Allocate RAM area for config block */
+	config_block = malloc(size);
+	if (!config_block) {
+		printf("Not enough malloc space available!\n");
+		return -1;
+	}
+
+	/* Clear it */
+	memset((void *)config_block, 0, size);
+
+#ifdef CONFIG_TRDX_CFG_BLOCK_IS_IN_MMC
+	/* Read production parameter config block from eMMC */
+	mmc = find_mmc_device(dev);
+	if (!mmc) {
+		puts("No MMC card found\n");
+		return 1;
+	}
+	if (part != mmc->part_num) {
+		if (mmc_switch_part(dev, part)) {
+			puts("MMC partition switch failed\n");
+			return 1;
+		}
+	}
+	if (offset < 0)
+		offset += mmc->capacity;
+	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
+
+	/* Just reading one 512 byte block */
+	if (mmc->block_dev.block_read(dev, blk_start, 1,
+				      (unsigned char *)config_block) != 1) {
+		return 1;
+	}
+
+	/* Switch back to regular eMMC user partition */
+	mmc_switch_part(0, 0);
+#endif /* CONFIG_TRDX_CFG_BLOCK_IS_IN_MMC */
+
+	/* Check validity */
+	cfg_block_ethaddr = config_block + 8;
+	if (memcmp(cfg_block_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", cfg_block_ethaddr);
+
+	return 0;
+}
+#endif /* CONFIG_TRDX_CFG_BLOCK */
diff --git a/board/toradex/common/configblock.h b/board/toradex/common/configblock.h
new file mode 100644
index 0000000000..5b204812b5
--- /dev/null
+++ b/board/toradex/common/configblock.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2011-2014 Toradex, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifdef CONFIG_TRDX_CFG_BLOCK
+int read_trdx_cfg_block(void);
+#endif
-- 
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