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/*
* 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 */
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