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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "comm-host.h"
#include "misc_util.h"
int ec_flash_read(uint8_t *buf, int offset, int size)
{
struct ec_params_flash_read p;
/* TODO(rspangler): need better way to determine max read size */
uint8_t rdata[EC_HOST_PARAM_SIZE - sizeof(struct ec_host_response)];
int rv;
int i;
/* Read data in chunks */
for (i = 0; i < size; i += sizeof(rdata)) {
p.offset = offset + i;
p.size = MIN(size - i, sizeof(rdata));
rv = ec_command(EC_CMD_FLASH_READ, 0,
&p, sizeof(p), rdata, sizeof(rdata));
if (rv < 0) {
fprintf(stderr, "Read error at offset %d\n", i);
return rv;
}
memcpy(buf + i, rdata, p.size);
}
return 0;
}
int ec_flash_verify(const uint8_t *buf, int offset, int size)
{
uint8_t *rbuf = malloc(size);
int rv;
int i;
if (!rbuf) {
fprintf(stderr, "Unable to allocate buffer.\n");
return -1;
}
rv = ec_flash_read(rbuf, offset, size);
if (rv < 0) {
free(rbuf);
return rv;
}
for (i = 0; i < size; i++) {
if (buf[i] != rbuf[i]) {
fprintf(stderr, "Mismatch at offset 0x%x: "
"want 0x%02x, got 0x%02x\n",
i, buf[i], rbuf[i]);
free(rbuf);
return -1;
}
}
free(rbuf);
return 0;
}
int ec_flash_write(const uint8_t *buf, int offset, int size)
{
struct ec_params_flash_write p;
int rv;
int i;
/* Write data in chunks */
for (i = 0; i < size; i += sizeof(p.data)) {
p.offset = offset + i;
p.size = MIN(size - i, sizeof(p.data));
memcpy(p.data, buf + i, p.size);
rv = ec_command(EC_CMD_FLASH_WRITE, 0, &p, sizeof(p), NULL, 0);
if (rv < 0) {
fprintf(stderr, "Write error at offset %d\n", i);
return rv;
}
}
return 0;
}
int ec_flash_erase(int offset, int size)
{
struct ec_params_flash_erase p;
p.offset = offset;
p.size = size;
return ec_command(EC_CMD_FLASH_ERASE, 0, &p, sizeof(p), NULL, 0);
}
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