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u-boot-brain/cmd/tlv_eeprom.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* See file CREDITS for list of people who contributed to this
* project.
*
* Copyright (C) 2013 Curt Brune <curt@cumulusnetworks.com>
* Copyright (C) 2014 Srideep <srideep_devireddy@dell.com>
* Copyright (C) 2013 Miles Tseng <miles_tseng@accton.com>
* Copyright (C) 2014,2016 david_yang <david_yang@accton.com>
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <i2c.h>
#include <i2c_eeprom.h>
#include <env.h>
#include <init.h>
#include <net.h>
#include <asm/global_data.h>
#include <linux/ctype.h>
#include <u-boot/crc.h>
#include "tlv_eeprom.h"
DECLARE_GLOBAL_DATA_PTR;
#define MAX_TLV_DEVICES 2
/* File scope function prototypes */
static bool is_checksum_valid(u8 *eeprom);
static int read_eeprom(u8 *eeprom);
static void show_eeprom(u8 *eeprom);
static void decode_tlv(struct tlvinfo_tlv *tlv);
static void update_crc(u8 *eeprom);
static int prog_eeprom(u8 *eeprom);
static bool tlvinfo_find_tlv(u8 *eeprom, u8 tcode, int *eeprom_index);
static bool tlvinfo_delete_tlv(u8 *eeprom, u8 code);
static bool tlvinfo_add_tlv(u8 *eeprom, int tcode, char *strval);
static int set_mac(char *buf, const char *string);
static int set_date(char *buf, const char *string);
static int set_bytes(char *buf, const char *string, int *converted_accum);
static void show_tlv_devices(void);
/* Set to 1 if we've read EEPROM into memory */
static int has_been_read;
/* The EERPOM contents after being read into memory */
static u8 eeprom[TLV_INFO_MAX_LEN];
static struct udevice *tlv_devices[MAX_TLV_DEVICES];
static unsigned int current_dev;
#define to_header(p) ((struct tlvinfo_header *)p)
#define to_entry(p) ((struct tlvinfo_tlv *)p)
#define HDR_SIZE sizeof(struct tlvinfo_header)
#define ENT_SIZE sizeof(struct tlvinfo_tlv)
static inline bool is_digit(char c)
{
return (c >= '0' && c <= '9');
}
/**
* is_valid_tlv
*
* Perform basic sanity checks on a TLV field. The TLV is pointed to
* by the parameter provided.
* 1. The type code is not reserved (0x00 or 0xFF)
*/
static inline bool is_valid_tlv(struct tlvinfo_tlv *tlv)
{
return((tlv->type != 0x00) && (tlv->type != 0xFF));
}
/**
* is_hex
*
* Tests if character is an ASCII hex digit
*/
static inline u8 is_hex(char p)
{
return (((p >= '0') && (p <= '9')) ||
((p >= 'A') && (p <= 'F')) ||
((p >= 'a') && (p <= 'f')));
}
/**
* is_checksum_valid
*
* Validate the checksum in the provided TlvInfo EEPROM data. First,
* verify that the TlvInfo header is valid, then make sure the last
* TLV is a CRC-32 TLV. Then calculate the CRC over the EEPROM data
* and compare it to the value stored in the EEPROM CRC-32 TLV.
*/
static bool is_checksum_valid(u8 *eeprom)
{
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_crc;
unsigned int calc_crc;
unsigned int stored_crc;
// Is the eeprom header valid?
if (!is_valid_tlvinfo_header(eeprom_hdr))
return false;
// Is the last TLV a CRC?
eeprom_crc = to_entry(&eeprom[HDR_SIZE +
be16_to_cpu(eeprom_hdr->totallen) - (ENT_SIZE + 4)]);
if (eeprom_crc->type != TLV_CODE_CRC_32 || eeprom_crc->length != 4)
return false;
// Calculate the checksum
calc_crc = crc32(0, (void *)eeprom,
HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen) - 4);
stored_crc = (eeprom_crc->value[0] << 24) |
(eeprom_crc->value[1] << 16) |
(eeprom_crc->value[2] << 8) |
eeprom_crc->value[3];
return calc_crc == stored_crc;
}
/**
* read_eeprom
*
* Read the EEPROM into memory, if it hasn't already been read.
*/
static int read_eeprom(u8 *eeprom)
{
int ret;
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_tlv = to_entry(&eeprom[HDR_SIZE]);
if (has_been_read)
return 0;
/* Read the header */
ret = read_tlv_eeprom((void *)eeprom_hdr, 0, HDR_SIZE, current_dev);
/* If the header was successfully read, read the TLVs */
if (ret == 0 && is_valid_tlvinfo_header(eeprom_hdr))
ret = read_tlv_eeprom((void *)eeprom_tlv, HDR_SIZE,
be16_to_cpu(eeprom_hdr->totallen),
current_dev);
// If the contents are invalid, start over with default contents
if (!is_valid_tlvinfo_header(eeprom_hdr) ||
!is_checksum_valid(eeprom)) {
strcpy(eeprom_hdr->signature, TLV_INFO_ID_STRING);
eeprom_hdr->version = TLV_INFO_VERSION;
eeprom_hdr->totallen = cpu_to_be16(0);
update_crc(eeprom);
}
has_been_read = 1;
#ifdef DEBUG
show_eeprom(eeprom);
#endif
return ret;
}
/**
* show_eeprom
*
* Display the contents of the EEPROM
*/
static void show_eeprom(u8 *eeprom)
{
int tlv_end;
int curr_tlv;
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_tlv;
if (!is_valid_tlvinfo_header(eeprom_hdr)) {
printf("EEPROM does not contain data in a valid TlvInfo format.\n");
return;
}
printf("TLV: %u\n", current_dev);
printf("TlvInfo Header:\n");
printf(" Id String: %s\n", eeprom_hdr->signature);
printf(" Version: %d\n", eeprom_hdr->version);
printf(" Total Length: %d\n", be16_to_cpu(eeprom_hdr->totallen));
printf("TLV Name Code Len Value\n");
printf("-------------------- ---- --- -----\n");
curr_tlv = HDR_SIZE;
tlv_end = HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen);
while (curr_tlv < tlv_end) {
eeprom_tlv = to_entry(&eeprom[curr_tlv]);
if (!is_valid_tlv(eeprom_tlv)) {
printf("Invalid TLV field starting at EEPROM offset %d\n",
curr_tlv);
return;
}
decode_tlv(eeprom_tlv);
curr_tlv += ENT_SIZE + eeprom_tlv->length;
}
printf("Checksum is %s.\n",
is_checksum_valid(eeprom) ? "valid" : "invalid");
#ifdef DEBUG
printf("EEPROM dump: (0x%x bytes)", TLV_INFO_MAX_LEN);
for (i = 0; i < TLV_INFO_MAX_LEN; i++) {
if ((i % 16) == 0)
printf("\n%02X: ", i);
printf("%02X ", eeprom[i]);
}
printf("\n");
#endif
}
/**
* Struct for displaying the TLV codes and names.
*/
struct tlv_code_desc {
u8 m_code;
char *m_name;
};
/**
* List of TLV codes and names.
*/
static struct tlv_code_desc tlv_code_list[] = {
{ TLV_CODE_PRODUCT_NAME, "Product Name"},
{ TLV_CODE_PART_NUMBER, "Part Number"},
{ TLV_CODE_SERIAL_NUMBER, "Serial Number"},
{ TLV_CODE_MAC_BASE, "Base MAC Address"},
{ TLV_CODE_MANUF_DATE, "Manufacture Date"},
{ TLV_CODE_DEVICE_VERSION, "Device Version"},
{ TLV_CODE_LABEL_REVISION, "Label Revision"},
{ TLV_CODE_PLATFORM_NAME, "Platform Name"},
{ TLV_CODE_ONIE_VERSION, "ONIE Version"},
{ TLV_CODE_MAC_SIZE, "MAC Addresses"},
{ TLV_CODE_MANUF_NAME, "Manufacturer"},
{ TLV_CODE_MANUF_COUNTRY, "Country Code"},
{ TLV_CODE_VENDOR_NAME, "Vendor Name"},
{ TLV_CODE_DIAG_VERSION, "Diag Version"},
{ TLV_CODE_SERVICE_TAG, "Service Tag"},
{ TLV_CODE_VENDOR_EXT, "Vendor Extension"},
{ TLV_CODE_CRC_32, "CRC-32"},
};
/**
* Look up a TLV name by its type.
*/
static inline const char *tlv_type2name(u8 type)
{
char *name = "Unknown";
int i;
for (i = 0; i < ARRAY_SIZE(tlv_code_list); i++) {
if (tlv_code_list[i].m_code == type) {
name = tlv_code_list[i].m_name;
break;
}
}
return name;
}
/*
* decode_tlv
*
* Print a string representing the contents of the TLV field. The format of
* the string is:
* 1. The name of the field left justified in 20 characters
* 2. The type code in hex right justified in 5 characters
* 3. The length in decimal right justified in 4 characters
* 4. The value, left justified in however many characters it takes
* The validity of EEPROM contents and the TLV field have been verified
* prior to calling this function.
*/
#define DECODE_NAME_MAX 20
/*
* The max decode value is currently for the 'raw' type or the 'vendor
* extension' type, both of which have the same decode format. The
* max decode string size is computed as follows:
*
* strlen(" 0xFF") * TLV_VALUE_MAX_LEN + 1
*
*/
#define DECODE_VALUE_MAX ((5 * TLV_VALUE_MAX_LEN) + 1)
static void decode_tlv(struct tlvinfo_tlv *tlv)
{
char name[DECODE_NAME_MAX];
char value[DECODE_VALUE_MAX];
int i;
strncpy(name, tlv_type2name(tlv->type), DECODE_NAME_MAX);
switch (tlv->type) {
case TLV_CODE_PRODUCT_NAME:
case TLV_CODE_PART_NUMBER:
case TLV_CODE_SERIAL_NUMBER:
case TLV_CODE_MANUF_DATE:
case TLV_CODE_LABEL_REVISION:
case TLV_CODE_PLATFORM_NAME:
case TLV_CODE_ONIE_VERSION:
case TLV_CODE_MANUF_NAME:
case TLV_CODE_MANUF_COUNTRY:
case TLV_CODE_VENDOR_NAME:
case TLV_CODE_DIAG_VERSION:
case TLV_CODE_SERVICE_TAG:
memcpy(value, tlv->value, tlv->length);
value[tlv->length] = 0;
break;
case TLV_CODE_MAC_BASE:
sprintf(value, "%02X:%02X:%02X:%02X:%02X:%02X",
tlv->value[0], tlv->value[1], tlv->value[2],
tlv->value[3], tlv->value[4], tlv->value[5]);
break;
case TLV_CODE_DEVICE_VERSION:
sprintf(value, "%u", tlv->value[0]);
break;
case TLV_CODE_MAC_SIZE:
sprintf(value, "%u", (tlv->value[0] << 8) | tlv->value[1]);
break;
case TLV_CODE_VENDOR_EXT:
value[0] = 0;
for (i = 0; (i < (DECODE_VALUE_MAX / 5)) && (i < tlv->length);
i++) {
sprintf(value, "%s 0x%02X", value, tlv->value[i]);
}
break;
case TLV_CODE_CRC_32:
sprintf(value, "0x%02X%02X%02X%02X",
tlv->value[0], tlv->value[1],
tlv->value[2], tlv->value[3]);
break;
default:
value[0] = 0;
for (i = 0; (i < (DECODE_VALUE_MAX / 5)) && (i < tlv->length);
i++) {
sprintf(value, "%s 0x%02X", value, tlv->value[i]);
}
break;
}
name[DECODE_NAME_MAX - 1] = 0;
printf("%-20s 0x%02X %3d %s\n", name, tlv->type, tlv->length, value);
}
/**
* update_crc
*
* This function updates the CRC-32 TLV. If there is no CRC-32 TLV, then
* one is added. This function should be called after each update to the
* EEPROM structure, to make sure the CRC is always correct.
*/
static void update_crc(u8 *eeprom)
{
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_crc;
unsigned int calc_crc;
int eeprom_index;
// Discover the CRC TLV
if (!tlvinfo_find_tlv(eeprom, TLV_CODE_CRC_32, &eeprom_index)) {
unsigned int totallen = be16_to_cpu(eeprom_hdr->totallen);
if ((totallen + ENT_SIZE + 4) > TLV_TOTAL_LEN_MAX)
return;
eeprom_index = HDR_SIZE + totallen;
eeprom_hdr->totallen = cpu_to_be16(totallen + ENT_SIZE + 4);
}
eeprom_crc = to_entry(&eeprom[eeprom_index]);
eeprom_crc->type = TLV_CODE_CRC_32;
eeprom_crc->length = 4;
// Calculate the checksum
calc_crc = crc32(0, (void *)eeprom,
HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen) - 4);
eeprom_crc->value[0] = (calc_crc >> 24) & 0xFF;
eeprom_crc->value[1] = (calc_crc >> 16) & 0xFF;
eeprom_crc->value[2] = (calc_crc >> 8) & 0xFF;
eeprom_crc->value[3] = (calc_crc >> 0) & 0xFF;
}
/**
* prog_eeprom
*
* Write the EEPROM data from CPU memory to the hardware.
*/
static int prog_eeprom(u8 *eeprom)
{
int ret = 0;
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
int eeprom_len;
update_crc(eeprom);
eeprom_len = HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen);
ret = write_tlv_eeprom(eeprom, eeprom_len);
if (ret) {
printf("Programming failed.\n");
return -1;
}
printf("Programming passed.\n");
return 0;
}
/**
* show_tlv_code_list - Display the list of TLV codes and names
*/
void show_tlv_code_list(void)
{
int i;
printf("TLV Code TLV Name\n");
printf("======== =================\n");
for (i = 0; i < ARRAY_SIZE(tlv_code_list); i++) {
printf("0x%02X %s\n",
tlv_code_list[i].m_code,
tlv_code_list[i].m_name);
}
}
/**
* do_tlv_eeprom
*
* This function implements the tlv_eeprom command.
*/
int do_tlv_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
char cmd;
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
// If no arguments, read the EERPOM and display its contents
if (argc == 1) {
read_eeprom(eeprom);
show_eeprom(eeprom);
return 0;
}
// We only look at the first character to the command, so "read" and
// "reset" will both be treated as "read".
cmd = argv[1][0];
// Read the EEPROM contents
if (cmd == 'r') {
has_been_read = 0;
if (!read_eeprom(eeprom))
printf("EEPROM data loaded from device to memory.\n");
return 0;
}
// Subsequent commands require that the EEPROM has already been read.
if (!has_been_read) {
printf("Please read the EEPROM data first, using the 'tlv_eeprom read' command.\n");
return 0;
}
// Handle the commands that don't take parameters
if (argc == 2) {
switch (cmd) {
case 'w': /* write */
prog_eeprom(eeprom);
break;
case 'e': /* erase */
strcpy(eeprom_hdr->signature, TLV_INFO_ID_STRING);
eeprom_hdr->version = TLV_INFO_VERSION;
eeprom_hdr->totallen = cpu_to_be16(0);
update_crc(eeprom);
printf("EEPROM data in memory reset.\n");
break;
case 'l': /* list */
show_tlv_code_list();
break;
case 'd': /* dev */
show_tlv_devices();
break;
default:
cmd_usage(cmdtp);
break;
}
return 0;
}
// The set command takes one or two args.
if (argc > 4) {
cmd_usage(cmdtp);
return 0;
}
// Set command. If the TLV exists in the EEPROM, delete it. Then if
// data was supplied for this TLV add the TLV with the new contents at
// the end.
if (cmd == 's') {
int tcode;
tcode = simple_strtoul(argv[2], NULL, 0);
tlvinfo_delete_tlv(eeprom, tcode);
if (argc == 4)
tlvinfo_add_tlv(eeprom, tcode, argv[3]);
} else if (cmd == 'd') { /* 'dev' command */
unsigned int devnum;
devnum = simple_strtoul(argv[2], NULL, 0);
if (devnum > MAX_TLV_DEVICES || !tlv_devices[devnum]) {
printf("Invalid device number\n");
return 0;
}
current_dev = devnum;
has_been_read = 0;
} else {
cmd_usage(cmdtp);
}
return 0;
}
/**
* This macro defines the tlv_eeprom command line command.
*/
U_BOOT_CMD(tlv_eeprom, 4, 1, do_tlv_eeprom,
"Display and program the system EEPROM data block.",
"[read|write|set <type_code> <string_value>|erase|list]\n"
"tlv_eeprom\n"
" - With no arguments display the current contents.\n"
"tlv_eeprom dev [dev]\n"
" - List devices or set current EEPROM device.\n"
"tlv_eeprom read\n"
" - Load EEPROM data from device to memory.\n"
"tlv_eeprom write\n"
" - Write the EEPROM data to persistent storage.\n"
"tlv_eeprom set <type_code> <string_value>\n"
" - Set a field to a value.\n"
" - If no string_value, field is deleted.\n"
" - Use 'tlv_eeprom write' to make changes permanent.\n"
"tlv_eeprom erase\n"
" - Reset the in memory EEPROM data.\n"
" - Use 'tlv_eeprom read' to refresh the in memory EEPROM data.\n"
" - Use 'tlv_eeprom write' to make changes permanent.\n"
"tlv_eeprom list\n"
" - List the understood TLV codes and names.\n"
);
/**
* tlvinfo_find_tlv
*
* This function finds the TLV with the supplied code in the EERPOM.
* An offset from the beginning of the EEPROM is returned in the
* eeprom_index parameter if the TLV is found.
*/
static bool tlvinfo_find_tlv(u8 *eeprom, u8 tcode, int *eeprom_index)
{
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_tlv;
int eeprom_end;
// Search through the TLVs, looking for the first one which matches the
// supplied type code.
*eeprom_index = HDR_SIZE;
eeprom_end = HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen);
while (*eeprom_index < eeprom_end) {
eeprom_tlv = to_entry(&eeprom[*eeprom_index]);
if (!is_valid_tlv(eeprom_tlv))
return false;
if (eeprom_tlv->type == tcode)
return true;
*eeprom_index += ENT_SIZE + eeprom_tlv->length;
}
return(false);
}
/**
* tlvinfo_delete_tlv
*
* This function deletes the TLV with the specified type code from the
* EEPROM.
*/
static bool tlvinfo_delete_tlv(u8 *eeprom, u8 code)
{
int eeprom_index;
int tlength;
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_tlv;
// Find the TLV and then move all following TLVs "forward"
if (tlvinfo_find_tlv(eeprom, code, &eeprom_index)) {
eeprom_tlv = to_entry(&eeprom[eeprom_index]);
tlength = ENT_SIZE + eeprom_tlv->length;
memcpy(&eeprom[eeprom_index], &eeprom[eeprom_index + tlength],
HDR_SIZE +
be16_to_cpu(eeprom_hdr->totallen) - eeprom_index -
tlength);
eeprom_hdr->totallen =
cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) -
tlength);
update_crc(eeprom);
return true;
}
return false;
}
/**
* tlvinfo_add_tlv
*
* This function adds a TLV to the EEPROM, converting the value (a string) to
* the format in which it will be stored in the EEPROM.
*/
#define MAX_TLV_VALUE_LEN 256
static bool tlvinfo_add_tlv(u8 *eeprom, int tcode, char *strval)
{
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
struct tlvinfo_tlv *eeprom_tlv;
int new_tlv_len = 0;
u32 value;
char data[MAX_TLV_VALUE_LEN];
int eeprom_index;
// Encode each TLV type into the format to be stored in the EERPOM
switch (tcode) {
case TLV_CODE_PRODUCT_NAME:
case TLV_CODE_PART_NUMBER:
case TLV_CODE_SERIAL_NUMBER:
case TLV_CODE_LABEL_REVISION:
case TLV_CODE_PLATFORM_NAME:
case TLV_CODE_ONIE_VERSION:
case TLV_CODE_MANUF_NAME:
case TLV_CODE_MANUF_COUNTRY:
case TLV_CODE_VENDOR_NAME:
case TLV_CODE_DIAG_VERSION:
case TLV_CODE_SERVICE_TAG:
strncpy(data, strval, MAX_TLV_VALUE_LEN);
new_tlv_len = min_t(size_t, MAX_TLV_VALUE_LEN, strlen(strval));
break;
case TLV_CODE_DEVICE_VERSION:
value = simple_strtoul(strval, NULL, 0);
if (value >= 256) {
printf("ERROR: Device version must be 255 or less. Value supplied: %u",
value);
return false;
}
data[0] = value & 0xFF;
new_tlv_len = 1;
break;
case TLV_CODE_MAC_SIZE:
value = simple_strtoul(strval, NULL, 0);
if (value >= 65536) {
printf("ERROR: MAC Size must be 65535 or less. Value supplied: %u",
value);
return false;
}
data[0] = (value >> 8) & 0xFF;
data[1] = value & 0xFF;
new_tlv_len = 2;
break;
case TLV_CODE_MANUF_DATE:
if (set_date(data, strval) != 0)
return false;
new_tlv_len = 19;
break;
case TLV_CODE_MAC_BASE:
if (set_mac(data, strval) != 0)
return false;
new_tlv_len = 6;
break;
case TLV_CODE_CRC_32:
printf("WARNING: The CRC TLV is set automatically and cannot be set manually.\n");
return false;
case TLV_CODE_VENDOR_EXT:
default:
if (set_bytes(data, strval, &new_tlv_len) != 0)
return false;
break;
}
// Is there room for this TLV?
if ((be16_to_cpu(eeprom_hdr->totallen) + ENT_SIZE + new_tlv_len) >
TLV_TOTAL_LEN_MAX) {
printf("ERROR: There is not enough room in the EERPOM to save data.\n");
return false;
}
// Add TLV at the end, overwriting CRC TLV if it exists
if (tlvinfo_find_tlv(eeprom, TLV_CODE_CRC_32, &eeprom_index))
eeprom_hdr->totallen =
cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) -
ENT_SIZE - 4);
else
eeprom_index = HDR_SIZE + be16_to_cpu(eeprom_hdr->totallen);
eeprom_tlv = to_entry(&eeprom[eeprom_index]);
eeprom_tlv->type = tcode;
eeprom_tlv->length = new_tlv_len;
memcpy(eeprom_tlv->value, data, new_tlv_len);
// Update the total length and calculate (add) a new CRC-32 TLV
eeprom_hdr->totallen = cpu_to_be16(be16_to_cpu(eeprom_hdr->totallen) +
ENT_SIZE + new_tlv_len);
update_crc(eeprom);
return true;
}
/**
* set_mac
*
* Converts a string MAC address into a binary buffer.
*
* This function takes a pointer to a MAC address string
* (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number).
* The string format is verified and then converted to binary and
* stored in a buffer.
*/
static int set_mac(char *buf, const char *string)
{
char *p = (char *)string;
int i;
int err = 0;
char *end;
if (!p) {
printf("ERROR: NULL mac addr string passed in.\n");
return -1;
}
if (strlen(p) != 17) {
printf("ERROR: MAC address strlen() != 17 -- %zu\n", strlen(p));
printf("ERROR: Bad MAC address format: %s\n", string);
return -1;
}
for (i = 0; i < 17; i++) {
if ((i % 3) == 2) {
if (p[i] != ':') {
err++;
printf("ERROR: mac: p[%i] != :, found: `%c'\n",
i, p[i]);
break;
}
continue;
} else if (!is_hex(p[i])) {
err++;
printf("ERROR: mac: p[%i] != hex digit, found: `%c'\n",
i, p[i]);
break;
}
}
if (err != 0) {
printf("ERROR: Bad MAC address format: %s\n", string);
return -1;
}
/* Convert string to binary */
for (i = 0, p = (char *)string; i < 6; i++) {
buf[i] = p ? simple_strtoul(p, &end, 16) : 0;
if (p)
p = (*end) ? end + 1 : end;
}
if (!is_valid_ethaddr((u8 *)buf)) {
printf("ERROR: MAC address must not be 00:00:00:00:00:00, a multicast address or FF:FF:FF:FF:FF:FF.\n");
printf("ERROR: Bad MAC address format: %s\n", string);
return -1;
}
return 0;
}
/**
* set_date
*
* Validates the format of the data string
*
* This function takes a pointer to a date string (i.e. MM/DD/YYYY hh:mm:ss)
* and validates that the format is correct. If so the string is copied
* to the supplied buffer.
*/
static int set_date(char *buf, const char *string)
{
int i;
if (!string) {
printf("ERROR: NULL date string passed in.\n");
return -1;
}
if (strlen(string) != 19) {
printf("ERROR: Date strlen() != 19 -- %zu\n", strlen(string));
printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n",
string);
return -1;
}
for (i = 0; string[i] != 0; i++) {
switch (i) {
case 2:
case 5:
if (string[i] != '/') {
printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n",
string);
return -1;
}
break;
case 10:
if (string[i] != ' ') {
printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n",
string);
return -1;
}
break;
case 13:
case 16:
if (string[i] != ':') {
printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n",
string);
return -1;
}
break;
default:
if (!is_digit(string[i])) {
printf("ERROR: Bad date format (MM/DD/YYYY hh:mm:ss): %s\n",
string);
return -1;
}
break;
}
}
strcpy(buf, string);
return 0;
}
/**
* set_bytes
*
* Converts a space-separated string of decimal numbers into a
* buffer of bytes.
*
* This function takes a pointer to a space-separated string of decimal
* numbers (i.e. "128 0x55 0321") with "C" standard radix specifiers
* and converts them to an array of bytes.
*/
static int set_bytes(char *buf, const char *string, int *converted_accum)
{
char *p = (char *)string;
int i;
uint byte;
if (!p) {
printf("ERROR: NULL string passed in.\n");
return -1;
}
/* Convert string to bytes */
for (i = 0, p = (char *)string; (i < TLV_VALUE_MAX_LEN) && (*p != 0);
i++) {
while ((*p == ' ') || (*p == '\t') || (*p == ',') ||
(*p == ';')) {
p++;
}
if (*p != 0) {
if (!is_digit(*p)) {
printf("ERROR: Non-digit found in byte string: (%s)\n",
string);
return -1;
}
byte = simple_strtoul(p, &p, 0);
if (byte >= 256) {
printf("ERROR: The value specified is greater than 255: (%u) in string: %s\n",
byte, string);
return -1;
}
buf[i] = byte & 0xFF;
}
}
if (i == TLV_VALUE_MAX_LEN && (*p != 0)) {
printf("ERROR: Trying to assign too many bytes (max: %d) in string: %s\n",
TLV_VALUE_MAX_LEN, string);
return -1;
}
*converted_accum = i;
return 0;
}
static void show_tlv_devices(void)
{
unsigned int dev;
for (dev = 0; dev < MAX_TLV_DEVICES; dev++)
if (tlv_devices[dev])
printf("TLV: %u%s\n", dev,
(dev == current_dev) ? " (*)" : "");
}
static int find_tlv_devices(struct udevice **tlv_devices_p)
{
int ret;
int count_dev = 0;
struct udevice *dev;
for (ret = uclass_first_device_check(UCLASS_I2C_EEPROM, &dev);
dev;
ret = uclass_next_device_check(&dev)) {
if (ret == 0)
tlv_devices_p[count_dev++] = dev;
if (count_dev >= MAX_TLV_DEVICES)
break;
}
return (count_dev == 0) ? -ENODEV : 0;
}
static struct udevice *find_tlv_device_by_index(int dev_num)
{
struct udevice *local_tlv_devices[MAX_TLV_DEVICES] = {};
struct udevice **tlv_devices_p;
int ret;
if (gd->flags & (GD_FLG_RELOC | GD_FLG_SPL_INIT)) {
/* Assume BSS is initialized; use static data */
if (tlv_devices[dev_num])
return tlv_devices[dev_num];
tlv_devices_p = tlv_devices;
} else {
tlv_devices_p = local_tlv_devices;
}
ret = find_tlv_devices(tlv_devices_p);
if (ret == 0 && tlv_devices_p[dev_num])
return tlv_devices_p[dev_num];
return NULL;
}
/**
* read_tlv_eeprom - read the hwinfo from i2c EEPROM
*/
int read_tlv_eeprom(void *eeprom, int offset, int len, int dev_num)
{
struct udevice *dev;
if (dev_num >= MAX_TLV_DEVICES)
return -EINVAL;
dev = find_tlv_device_by_index(dev_num);
if (!dev)
return -ENODEV;
return i2c_eeprom_read(dev, offset, eeprom, len);
}
/**
* write_tlv_eeprom - write the hwinfo to i2c EEPROM
*/
int write_tlv_eeprom(void *eeprom, int len)
{
if (!(gd->flags & GD_FLG_RELOC))
return -ENODEV;
if (!tlv_devices[current_dev])
return -ENODEV;
return i2c_eeprom_write(tlv_devices[current_dev], 0, eeprom, len);
}
int read_tlvinfo_tlv_eeprom(void *eeprom, struct tlvinfo_header **hdr,
struct tlvinfo_tlv **first_entry, int dev_num)
{
int ret;
struct tlvinfo_header *tlv_hdr;
struct tlvinfo_tlv *tlv_ent;
/* Read TLV header */
ret = read_tlv_eeprom(eeprom, 0, HDR_SIZE, dev_num);
if (ret < 0)
return ret;
tlv_hdr = eeprom;
if (!is_valid_tlvinfo_header(tlv_hdr))
return -EINVAL;
/* Read TLV entries */
tlv_ent = to_entry(&tlv_hdr[1]);
ret = read_tlv_eeprom(tlv_ent, HDR_SIZE,
be16_to_cpu(tlv_hdr->totallen), dev_num);
if (ret < 0)
return ret;
if (!is_checksum_valid(eeprom))
return -EINVAL;
*hdr = tlv_hdr;
*first_entry = tlv_ent;
return 0;
}
/**
* mac_read_from_eeprom
*
* Read the MAC addresses from EEPROM
*
* This function reads the MAC addresses from EEPROM and sets the
* appropriate environment variables for each one read.
*
* The environment variables are only set if they haven't been set already.
* This ensures that any user-saved variables are never overwritten.
*
* This function must be called after relocation.
*/
int mac_read_from_eeprom(void)
{
unsigned int i;
int eeprom_index;
struct tlvinfo_tlv *eeprom_tlv;
int maccount;
u8 macbase[6];
struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
puts("EEPROM: ");
if (read_eeprom(eeprom)) {
printf("Read failed.\n");
return -1;
}
maccount = 1;
if (tlvinfo_find_tlv(eeprom, TLV_CODE_MAC_SIZE, &eeprom_index)) {
eeprom_tlv = to_entry(&eeprom[eeprom_index]);
maccount = (eeprom_tlv->value[0] << 8) | eeprom_tlv->value[1];
}
memcpy(macbase, "\0\0\0\0\0\0", 6);
if (tlvinfo_find_tlv(eeprom, TLV_CODE_MAC_BASE, &eeprom_index)) {
eeprom_tlv = to_entry(&eeprom[eeprom_index]);
memcpy(macbase, eeprom_tlv->value, 6);
}
for (i = 0; i < maccount; i++) {
if (is_valid_ethaddr(macbase)) {
char ethaddr[18];
char enetvar[11];
sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
macbase[0], macbase[1], macbase[2],
macbase[3], macbase[4], macbase[5]);
sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i);
/* Only initialize environment variables that are blank
* (i.e. have not yet been set)
*/
if (!env_get(enetvar))
env_set(enetvar, ethaddr);
macbase[5]++;
if (macbase[5] == 0) {
macbase[4]++;
if (macbase[4] == 0) {
macbase[3]++;
if (macbase[3] == 0) {
macbase[0] = 0;
macbase[1] = 0;
macbase[2] = 0;
}
}
}
}
}
printf("%s v%u len=%u\n", eeprom_hdr->signature, eeprom_hdr->version,
be16_to_cpu(eeprom_hdr->totallen));
return 0;
}
/**
* populate_serial_number - read the serial number from EEPROM
*
* This function reads the serial number from the EEPROM and sets the
* appropriate environment variable.
*
* The environment variable is only set if it has not been set
* already. This ensures that any user-saved variables are never
* overwritten.
*
* This function must be called after relocation.
*/
int populate_serial_number(void)
{
char serialstr[257];
int eeprom_index;
struct tlvinfo_tlv *eeprom_tlv;
if (env_get("serial#"))
return 0;
if (read_eeprom(eeprom)) {
printf("Read failed.\n");
return -1;
}
if (tlvinfo_find_tlv(eeprom, TLV_CODE_SERIAL_NUMBER, &eeprom_index)) {
eeprom_tlv = to_entry(&eeprom[eeprom_index]);
memcpy(serialstr, eeprom_tlv->value, eeprom_tlv->length);
serialstr[eeprom_tlv->length] = 0;
env_set("serial#", serialstr);
}
return 0;
}
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