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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.
*/
/* Flash memory commands for Chrome EC */
#include "console.h"
#include "flash.h"
#include "host_command.h"
#include "registers.h" /* TODO: remove; only for temp debugging */
#include "shared_mem.h"
#include "system.h"
#include "util.h"
/* Parse offset and size from command line argv[0] and argv[1].
*
* Default values: If argc<1, leaves offset unchanged, returning error if
* *offset<0. If argc<2, leaves size unchanged, returning error if *size<0. */
static int parse_offset_size(int argc, char **argv, int *offset, int *size)
{
char *e;
int i;
if (argc >= 1) {
i = (uint32_t)strtoi(argv[0], &e, 0);
if (*e)
return EC_ERROR_INVAL;
*offset = i;
} else if (*offset < 0)
return EC_ERROR_INVAL;
if (argc >= 2) {
i = (uint32_t)strtoi(argv[1], &e, 0);
if (*e)
return EC_ERROR_INVAL;
*size = i;
} else if (*size < 0)
return EC_ERROR_INVAL;
return EC_SUCCESS;
}
/*****************************************************************************/
/* Console commands */
static int command_flash_info(int argc, char **argv)
{
const uint8_t *wp;
int banks = flash_get_size() / flash_get_protect_block_size();
int i;
ccprintf("Physical:%4d KB\n", flash_physical_size() / 1024);
ccprintf("Usable: %4d KB\n", flash_get_size() / 1024);
ccprintf("Write: %4d B\n", flash_get_write_block_size());
ccprintf("Erase: %4d B\n", flash_get_erase_block_size());
ccprintf("Protect: %4d B\n", flash_get_protect_block_size());
i = flash_get_protect_lock();
ccprintf("Lock: %s%s\n",
(i & FLASH_PROTECT_LOCK_SET) ? "LOCKED" : "unlocked",
(i & FLASH_PROTECT_LOCK_APPLIED) ? ",APPLIED" : "");
ccprintf("WP pin: %sasserted\n",
(i & FLASH_PROTECT_PIN_ASSERTED) ? "" : "de");
wp = flash_get_protect_array();
ccputs("Protected now:");
for (i = 0; i < banks; i++) {
if (!(i & 7))
ccputs(" ");
ccputs(wp[i] & FLASH_PROTECT_UNTIL_REBOOT ? "Y" : ".");
}
ccputs("\n Persistent: ");
for (i = 0; i < banks; i++) {
if (!(i & 7))
ccputs(" ");
ccputs(wp[i] & FLASH_PROTECT_PERSISTENT ? "Y" : ".");
}
ccputs("\n");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(flashinfo, command_flash_info);
static int command_flash_erase(int argc, char **argv)
{
int offset = -1;
int size = flash_get_erase_block_size();
int rv;
rv = parse_offset_size(argc - 1, argv + 1, &offset, &size);
if (rv)
return rv;
ccprintf("Erasing %d bytes at 0x%x...\n", size, offset, offset);
return flash_erase(offset, size);
}
DECLARE_CONSOLE_COMMAND(flasherase, command_flash_erase);
static int command_flash_write(int argc, char **argv)
{
int offset = -1;
int size = flash_get_erase_block_size();
int rv;
char *data;
int i;
rv = parse_offset_size(argc - 1, argv + 1, &offset, &size);
if (rv)
return rv;
if (size > shared_mem_size())
size = shared_mem_size();
/* Acquire the shared memory buffer */
rv = shared_mem_acquire(size, 0, &data);
if (rv) {
ccputs("Can't get shared mem\n");
return rv;
}
/* Fill the data buffer with a pattern */
for (i = 0; i < size; i++)
data[i] = i;
ccprintf("Writing %d bytes to 0x%x...\n",
size, offset, offset);
rv = flash_write(offset, size, data);
/* Free the buffer */
shared_mem_release(data);
return rv;
}
DECLARE_CONSOLE_COMMAND(flashwrite, command_flash_write);
static int command_flash_wp(int argc, char **argv)
{
int offset = -1;
int size = flash_get_protect_block_size();
int rv;
if (argc < 2)
return EC_ERROR_INVAL;
/* Commands that don't need offset and size */
if (!strcasecmp(argv[1], "lock"))
return flash_lock_protect(1);
else if (!strcasecmp(argv[1], "unlock"))
return flash_lock_protect(0);
/* All remaining commands need offset and size */
rv = parse_offset_size(argc - 2, argv + 2, &offset, &size);
if (rv)
return rv;
if (!strcasecmp(argv[1], "now"))
return flash_protect_until_reboot(offset, size);
else if (!strcasecmp(argv[1], "set"))
return flash_set_protect(offset, size, 1);
else if (!strcasecmp(argv[1], "clear"))
return flash_set_protect(offset, size, 0);
else
return EC_ERROR_INVAL;
}
DECLARE_CONSOLE_COMMAND(flashwp, command_flash_wp);
/*****************************************************************************/
/* Host commands */
int flash_command_get_info(uint8_t *data, int *resp_size)
{
struct ec_response_flash_info *r =
(struct ec_response_flash_info *)data;
r->flash_size = flash_get_size();
r->write_block_size = flash_get_write_block_size();
r->erase_block_size = flash_get_erase_block_size();
r->protect_block_size = flash_get_protect_block_size();
*resp_size = sizeof(struct ec_response_flash_info);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_INFO, flash_command_get_info);
#ifdef SUPPORT_CHECKSUM
int flash_command_checksum(uint8_t *data, int *resp_size)
{
struct ec_params_flash_checksum *p =
(struct ec_params_flash_checksum *)data;
struct ec_response_flash_checksum *r =
(struct ec_response_flash_checksum *)data;
uint8_t cs, byte;
int j;
for (cs = 0, j = 0; j < p->size; ++j) {
if (flash_read(p->offset + j, 1, &byte))
return EC_RES_ERROR;
BYTE_IN(cs, byte);
}
r->checksum = cs;
*resp_size = sizeof(struct ec_response_flash_checksum);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_CHECKSUM, flash_command_checksum);
#endif
int flash_command_read(uint8_t *data, int *resp_size)
{
struct ec_params_flash_read *p =
(struct ec_params_flash_read *)data;
struct ec_response_flash_read *r =
(struct ec_response_flash_read *)data;
if (p->size > sizeof(r->data))
return EC_RES_ERROR;
if (flash_read(p->offset, p->size, r->data))
return EC_RES_ERROR;
*resp_size = sizeof(struct ec_response_flash_read);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_READ, flash_command_read);
int flash_command_write(uint8_t *data, int *resp_size)
{
struct ec_params_flash_write *p =
(struct ec_params_flash_write *)data;
if (p->size > sizeof(p->data))
return EC_RES_ERROR;
if (system_unsafe_to_overwrite(p->offset, p->size))
return EC_RES_ACCESS_DENIED;
if (flash_write(p->offset, p->size, p->data))
return EC_RES_ERROR;
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_WRITE, flash_command_write);
int flash_command_erase(uint8_t *data, int *resp_size)
{
struct ec_params_flash_erase *p =
(struct ec_params_flash_erase *)data;
if (system_unsafe_to_overwrite(p->offset, p->size))
return EC_RES_ACCESS_DENIED;
if (flash_erase(p->offset, p->size))
return EC_RES_ERROR;
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_ERASE, flash_command_erase);
int flash_command_wp_enable(uint8_t *data, int *resp_size)
{
struct ec_params_flash_wp_enable *p =
(struct ec_params_flash_wp_enable *)data;
return flash_lock_protect(p->enable_wp ? 1 : 0);
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_WP_ENABLE,
flash_command_wp_enable);
int flash_command_wp_get_state(uint8_t *data, int *resp_size)
{
struct ec_response_flash_wp_enable *p =
(struct ec_response_flash_wp_enable *)data;
if (flash_get_protect_lock() & FLASH_PROTECT_LOCK_SET)
p->enable_wp = 1;
else
p->enable_wp = 0;
*resp_size = sizeof(struct ec_response_flash_wp_enable);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_WP_GET_STATE,
flash_command_wp_get_state);
int flash_command_wp_set_range(uint8_t *data, int *resp_size)
{
struct ec_params_flash_wp_range *p =
(struct ec_params_flash_wp_range *)data;
enum ec_status ret;
if (p->size)
ret = flash_set_protect(p->offset, p->size, 1);
else
ret = flash_set_protect(0, flash_get_size(), 0);
return ret;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_WP_SET_RANGE,
flash_command_wp_set_range);
int flash_command_wp_get_range(uint8_t *data, int *resp_size)
{
struct ec_response_flash_wp_range *p =
(struct ec_response_flash_wp_range *)data;
int pbsize = flash_get_protect_block_size();
int banks = flash_get_size() / pbsize;
const uint8_t *blocks;
int i;
int min = -1, max = banks - 1; /* the enclosed range for protected. */
blocks = flash_get_protect_array();
for (i = 0; i < banks; i++) {
if (min == -1) {
/* Looking for the first protected bank. */
if (blocks[i] & (FLASH_PROTECT_PERSISTENT |
FLASH_PROTECT_UNTIL_REBOOT)) {
min = i;
}
} else if (i < max) {
/* Looking for the unprotected bank. */
if (!(blocks[i] & (FLASH_PROTECT_PERSISTENT |
FLASH_PROTECT_UNTIL_REBOOT))) {
max = i - 1;
}
}
}
/* TODO(crosbug.com/p/9492): return multiple region of ranges(). */
if (min == -1) {
/* None of bank is protected. */
p->offset = 0;
p->size = 0;
} else {
p->offset = min * pbsize;
p->size = (max - min + 1) * pbsize;
}
*resp_size = sizeof(struct ec_response_flash_wp_range);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FLASH_WP_GET_RANGE,
flash_command_wp_get_range);
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