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/* Copyright (c) 2011 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.
*/
/* Flash memory module for Chrome EC */
#include "console.h"
#include "flash.h"
#include "flash_commands.h"
#include "lpc_commands.h"
#include "registers.h" /* TODO: remove; only for temp debugging */
#include "shared_mem.h"
#include "uart.h"
#include "util.h"
/*****************************************************************************/
/* Console commands */
static int command_flash_info(int argc, char **argv)
{
uart_printf("Usable flash size: %d KB\n", flash_get_size());
return EC_SUCCESS;
}
static int command_flash_erase(int argc, char **argv)
{
int offset = 0;
int size = FLASH_ERASE_BYTES;
char *endptr;
int rv;
if (argc < 2) {
uart_puts("Usage: flasherase <offset> [size]\n");
return EC_ERROR_UNKNOWN;
}
offset = strtoi(argv[1], &endptr, 0);
if (*endptr) {
uart_puts("Invalid offset\n");
return EC_ERROR_UNKNOWN;
}
if (argc > 2) {
size = strtoi(argv[2], &endptr, 0);
if (*endptr) {
uart_puts("Invalid size\n");
return EC_ERROR_UNKNOWN;
}
}
uart_printf("Erasing %d bytes at offset 0x%x (%d)...\n",
size, offset, offset);
rv = flash_erase(offset, size);
if (rv == EC_SUCCESS)
uart_puts("done.\n");
else
uart_printf("failed. (error %d)\n", rv);
return rv;
}
static int command_flash_write(int argc, char **argv)
{
char *data;
int offset = 0;
int size = 1024; /* Default size */
char *endptr;
int rv;
int i;
if (argc < 2) {
uart_puts("Usage: flashwrite <offset> <size>\n");
return EC_ERROR_UNKNOWN;
}
offset = strtoi(argv[1], &endptr, 0);
if (*endptr) {
uart_puts("Invalid offset\n");
return EC_ERROR_UNKNOWN;
}
if (argc > 2) {
size = strtoi(argv[2], &endptr, 0);
if (*endptr) {
uart_puts("Invalid size\n");
return EC_ERROR_UNKNOWN;
}
if (size > shared_mem_size()) {
uart_puts("Truncating size\n");
size = sizeof(data);
}
}
/* Acquire the shared memory buffer */
rv = shared_mem_acquire(size, 0, &data);
if (rv) {
uart_printf("Unable to acquire %d byte buffer\n", size);
return rv;
}
/* Fill the data buffer with a pattern */
for (i = 0; i < size; i++)
data[i] = i;
uart_printf("Writing %d bytes to offset 0x%x (%d)...\n",
size, offset, offset);
rv = flash_write(offset, size, data);
if (rv == EC_SUCCESS)
uart_puts("done.\n");
else
uart_printf("failed. (error %d)\n", rv);
/* Free the buffer */
shared_mem_release(data);
return rv;
}
static int command_flash_wp(int argc, char **argv)
{
int b = 0;
char *endptr;
if (argc < 2) {
uart_puts("Usage: flashwp [bitmask]\n");
uart_printf("(current value of FMPPE1: 0x%08x)\n",
LM4_FLASH_FMPPE1);
return EC_SUCCESS;
}
b = strtoi(argv[1], &endptr, 0);
if (*endptr) {
uart_puts("Invalid bitmask\n");
return EC_ERROR_UNKNOWN;
}
uart_printf("FMPPE1 before: 0x%08x\n", LM4_FLASH_FMPPE1);
LM4_FLASH_FMPPE1 = b;
uart_printf("FMPPE1 after: 0x%08x\n", LM4_FLASH_FMPPE1);
return EC_SUCCESS;
}
static const struct console_command console_commands[] = {
{"flasherase", command_flash_erase},
{"flashinfo", command_flash_info},
{"flashwrite", command_flash_write},
{"flashwp", command_flash_wp},
};
static const struct console_group command_group = {
"Flash", console_commands, ARRAY_SIZE(console_commands)
};
/*****************************************************************************/
/* Host commands */
enum lpc_status flash_command_get_info(uint8_t *data)
{
struct lpc_response_flash_info *r =
(struct lpc_response_flash_info *)data;
r->flash_size = flash_get_size();
r->write_block_size = FLASH_WRITE_BYTES;
r->erase_block_size = FLASH_ERASE_BYTES;
r->protect_block_size = FLASH_PROTECT_BYTES;
return EC_LPC_STATUS_SUCCESS;
}
enum lpc_status flash_command_read(uint8_t *data)
{
struct lpc_params_flash_read *p =
(struct lpc_params_flash_read *)data;
struct lpc_response_flash_read *r =
(struct lpc_response_flash_read *)data;
if (p->size > sizeof(r->data))
return EC_LPC_STATUS_ERROR;
if (flash_read(p->offset, p->size, r->data))
return EC_LPC_STATUS_ERROR;
return EC_LPC_STATUS_SUCCESS;
}
enum lpc_status flash_command_write(uint8_t *data)
{
struct lpc_params_flash_write *p =
(struct lpc_params_flash_write *)data;
if (p->size > sizeof(p->data))
return EC_LPC_STATUS_ERROR;
if (flash_write(p->offset, p->size, p->data))
return EC_LPC_STATUS_ERROR;
return EC_LPC_STATUS_SUCCESS;
}
enum lpc_status flash_command_erase(uint8_t *data)
{
struct lpc_params_flash_erase *p =
(struct lpc_params_flash_erase *)data;
if (flash_erase(p->offset, p->size))
return EC_LPC_STATUS_ERROR;
return EC_LPC_STATUS_SUCCESS;
}
/*****************************************************************************/
/* Initialization */
int flash_commands_init(void)
{
/* Register our internal commands */
console_register_commands(&command_group);
return EC_SUCCESS;
}
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