mirror of
https://github.com/brain-hackers/u-boot-brain
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251 lines
6.0 KiB
C
251 lines
6.0 KiB
C
![]() |
/*
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* (C) Copyright 2009-2016 CompuLab, Ltd.
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*
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* Authors: Nikita Kiryanov <nikita@compulab.co.il>
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* Igor Grinberg <grinberg@compulab.co.il>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/string.h>
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#include <eeprom_field.h>
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static void __eeprom_field_print_bin(const struct eeprom_field *field,
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char *delimiter, bool reverse)
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{
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int i;
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int from = reverse ? field->size - 1 : 0;
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int to = reverse ? 0 : field->size - 1;
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printf(PRINT_FIELD_SEGMENT, field->name);
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for (i = from; i != to; reverse ? i-- : i++)
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printf("%02x%s", field->buf[i], delimiter);
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printf("%02x\n", field->buf[i]);
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}
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static int __eeprom_field_update_bin(struct eeprom_field *field,
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const char *value, bool reverse)
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{
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int len = strlen(value);
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int k, j, i = reverse ? len - 1 : 0;
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unsigned char byte;
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char *endptr;
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/* each two characters in the string fit in one byte */
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if (len > field->size * 2)
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return -1;
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memset(field->buf, 0, field->size);
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/* i - string iterator, j - buf iterator */
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for (j = 0; j < field->size; j++) {
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byte = 0;
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char tmp[3] = { 0, 0, 0 };
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if ((reverse && i < 0) || (!reverse && i >= len))
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break;
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for (k = 0; k < 2; k++) {
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if (reverse && i == 0) {
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tmp[k] = value[i];
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break;
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}
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tmp[k] = value[reverse ? i - 1 + k : i + k];
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}
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byte = simple_strtoul(tmp, &endptr, 0);
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if (*endptr != '\0' || byte < 0)
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return -1;
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field->buf[j] = byte;
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i = reverse ? i - 2 : i + 2;
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}
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return 0;
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}
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static int __eeprom_field_update_bin_delim(struct eeprom_field *field,
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char *value, char *delimiter)
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{
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int count = 0;
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int i, val;
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const char *tmp = value;
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char *tok;
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char *endptr;
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tmp = strstr(tmp, delimiter);
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while (tmp != NULL) {
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count++;
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tmp++;
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tmp = strstr(tmp, delimiter);
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}
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if (count > field->size)
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return -1;
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tok = strtok(value, delimiter);
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for (i = 0; tok && i < field->size; i++) {
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val = simple_strtoul(tok, &endptr, 0);
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if (*endptr != '\0')
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return -1;
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/* here we assume that each tok is no more than byte long */
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field->buf[i] = (unsigned char)val;
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tok = strtok(NULL, delimiter);
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}
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return 0;
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}
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/**
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* eeprom_field_print_bin() - print a field which contains binary data
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*
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* Treat the field data as simple binary data, and print it as two digit
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* hexadecimal values.
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* Sample output:
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* Field Name 0102030405060708090a
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*
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* @field: an initialized field to print
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*/
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void eeprom_field_print_bin(const struct eeprom_field *field)
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{
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__eeprom_field_print_bin(field, "", false);
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}
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/**
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* eeprom_field_update_bin() - Update field with new data in binary form
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*
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* @field: an initialized field
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* @value: a string of values (i.e. "10b234a")
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*/
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int eeprom_field_update_bin(struct eeprom_field *field, char *value)
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{
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return __eeprom_field_update_bin(field, value, false);
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}
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/**
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* eeprom_field_update_reserved() - Update reserved field with new data in
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* binary form
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*
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* @field: an initialized field
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* @value: a space delimited string of byte values (i.e. "1 02 3 0x4")
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*/
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int eeprom_field_update_reserved(struct eeprom_field *field, char *value)
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{
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return __eeprom_field_update_bin_delim(field, value, " ");
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}
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/**
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* eeprom_field_print_bin_rev() - print a field which contains binary data in
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* reverse order
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*
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* Treat the field data as simple binary data, and print it in reverse order
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* as two digit hexadecimal values.
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*
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* Data in field:
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* 0102030405060708090a
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* Sample output:
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* Field Name 0a090807060504030201
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*
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* @field: an initialized field to print
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*/
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void eeprom_field_print_bin_rev(const struct eeprom_field *field)
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{
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__eeprom_field_print_bin(field, "", true);
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}
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/**
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* eeprom_field_update_bin_rev() - Update field with new data in binary form,
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* storing it in reverse
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*
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* This function takes a string of byte values, and stores them
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* in the field in the reverse order. i.e. if the input string was "1234",
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* "3412" will be written to the field.
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*
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* @field: an initialized field
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* @value: a string of byte values
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*/
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int eeprom_field_update_bin_rev(struct eeprom_field *field, char *value)
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{
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return __eeprom_field_update_bin(field, value, true);
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}
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/**
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* eeprom_field_print_mac_addr() - print a field which contains a mac address
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*
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* Treat the field data as simple binary data, and print it formatted as a MAC
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* address.
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* Sample output:
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* Field Name 01:02:03:04:05:06
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*
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* @field: an initialized field to print
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*/
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void eeprom_field_print_mac(const struct eeprom_field *field)
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{
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__eeprom_field_print_bin(field, ":", false);
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}
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/**
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* eeprom_field_update_mac() - Update a mac address field which contains binary
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* data
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*
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* @field: an initialized field
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* @value: a colon delimited string of byte values (i.e. "1:02:3:ff")
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*/
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int eeprom_field_update_mac(struct eeprom_field *field, char *value)
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{
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return __eeprom_field_update_bin_delim(field, value, ":");
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}
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/**
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* eeprom_field_print_ascii() - print a field which contains ASCII data
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* @field: an initialized field to print
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*/
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void eeprom_field_print_ascii(const struct eeprom_field *field)
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{
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char format[8];
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sprintf(format, "%%.%ds\n", field->size);
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printf(PRINT_FIELD_SEGMENT, field->name);
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printf(format, field->buf);
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}
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/**
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* eeprom_field_update_ascii() - Update field with new data in ASCII form
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* @field: an initialized field
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* @value: the new string data
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*
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* Returns 0 on success, -1 of failure (new string too long).
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*/
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int eeprom_field_update_ascii(struct eeprom_field *field, char *value)
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{
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if (strlen(value) >= field->size) {
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printf("%s: new data too long\n", field->name);
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return -1;
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}
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strncpy((char *)field->buf, value, field->size - 1);
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field->buf[field->size - 1] = '\0';
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return 0;
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}
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/**
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* eeprom_field_print_reserved() - print the "Reserved fields" field
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*
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* Print a notice that the following field_size bytes are reserved.
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*
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* Sample output:
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* Reserved fields (64 bytes)
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*
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* @field: an initialized field to print
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*/
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void eeprom_field_print_reserved(const struct eeprom_field *field)
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{
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printf(PRINT_FIELD_SEGMENT, "Reserved fields\t");
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printf("(%d bytes)\n", field->size);
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}
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