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/* Copyright (c) 2012 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.
*/
/* Persistent storage commands for Chrome EC */
#include "board.h"
#include "eeprom.h"
#include "host_command.h"
#include "uart.h"
#include "util.h"
enum lpc_status pstore_command_get_info(uint8_t *data)
{
struct lpc_response_pstore_info *r =
(struct lpc_response_pstore_info *)data;
uart_printf("ee block size=%d, count=%d\n",
eeprom_get_block_size(), eeprom_get_block_count());
ASSERT(EEPROM_BLOCK_START_PSTORE + EEPROM_BLOCK_COUNT_PSTORE <=
eeprom_get_block_count());
r->pstore_size = EEPROM_BLOCK_COUNT_PSTORE * eeprom_get_block_size();
r->access_size = sizeof(uint32_t);
return EC_LPC_RESULT_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_LPC_COMMAND_PSTORE_INFO, pstore_command_get_info);
enum lpc_status pstore_command_read(uint8_t *data)
{
struct lpc_params_pstore_read *p =
(struct lpc_params_pstore_read *)data;
struct lpc_response_pstore_read *r =
(struct lpc_response_pstore_read *)data;
char *dest = r->data;
int block_size = eeprom_get_block_size();
int block = p->offset / block_size + EEPROM_BLOCK_COUNT_PSTORE;
int offset = p->offset % block_size;
int bytes_left = p->size;
if (p->size > sizeof(r->data))
return EC_LPC_RESULT_ERROR;
while (bytes_left) {
/* Read what we can from the current block */
int bytes_this = MIN(bytes_left, block_size - offset);
if (block >=
EEPROM_BLOCK_START_PSTORE + EEPROM_BLOCK_COUNT_PSTORE)
return EC_LPC_RESULT_ERROR;
if (eeprom_read(block, offset, bytes_this, dest))
return EC_LPC_RESULT_ERROR;
/* Continue to the next block if necessary */
offset = 0;
block++;
bytes_left -= bytes_this;
dest += bytes_this;
}
return EC_LPC_RESULT_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_LPC_COMMAND_PSTORE_READ, pstore_command_read);
enum lpc_status pstore_command_write(uint8_t *data)
{
struct lpc_params_pstore_write *p =
(struct lpc_params_pstore_write *)data;
const char *src = p->data;
int block_size = eeprom_get_block_size();
int block = p->offset / block_size + EEPROM_BLOCK_COUNT_PSTORE;
int offset = p->offset % block_size;
int bytes_left = p->size;
if (p->size > sizeof(p->data))
return EC_LPC_RESULT_ERROR;
while (bytes_left) {
/* Write what we can to the current block */
int bytes_this = MIN(bytes_left, block_size - offset);
if (block >=
EEPROM_BLOCK_START_PSTORE + EEPROM_BLOCK_COUNT_PSTORE)
return EC_LPC_RESULT_ERROR;
if (eeprom_write(block, offset, bytes_this, src))
return EC_LPC_RESULT_ERROR;
/* Continue to the next block if necessary */
offset = 0;
block++;
bytes_left -= bytes_this;
src += bytes_this;
}
return EC_LPC_RESULT_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_LPC_COMMAND_PSTORE_WRITE, pstore_command_write);
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