int flash_physical_write(int offset, int size, const char *data)
{
int dest_addr = offset;
const int sz_page = CONFIG_FLASH_WRITE_IDEAL_SIZE;
/* Fail if offset, size, and data aren't at least word-aligned */
if ((offset | size
| (uint32_t)(uintptr_t)data) & (CONFIG_FLASH_WRITE_SIZE - 1))
return EC_ERROR_INVAL;
/* check protection */
if (all_protected)
return EC_ERROR_ACCESS_DENIED;
/* Disable tri-state */
TRISTATE_FLASH(0);
/* Write the data per CONFIG_FLASH_WRITE_IDEAL_SIZE bytes */
for (; size >= sz_page; size -= sz_page) {
/* check protection */
if (flash_check_prot_range(dest_addr, sz_page))
return EC_ERROR_ACCESS_DENIED;
/* Enable write */
flash_write_enable();
/* Burst UMA transaction */
flash_burst_write(dest_addr, sz_page, data);
/* Wait write completed */
flash_wait_ready();
data += sz_page;
dest_addr += sz_page;
}
/* Handle final partial page, if any */
if (size != 0) {
/* check protection */
if (flash_check_prot_range(dest_addr, size))
return EC_ERROR_ACCESS_DENIED;
/* Enable write */
flash_write_enable();
/* Burst UMA transaction */
flash_burst_write(dest_addr, size, data);
/* Wait write completed */
flash_wait_ready();
}
/* Enable tri-state */
TRISTATE_FLASH(1);
return EC_SUCCESS;
}
int flash_physical_erase(int offset, int size)
{
int rv = EC_SUCCESS;
/* check protection */
if (all_protected)
return EC_ERROR_ACCESS_DENIED;
/* Lock physical flash operations */
flash_lock_mapped_storage(1);
/* Disable tri-state */
TRISTATE_FLASH(0);
/* Alignment has been checked in upper layer */
for (; size > 0; size -= CONFIG_FLASH_ERASE_SIZE,
offset += CONFIG_FLASH_ERASE_SIZE) {
/* check protection */
if (flash_check_prot_range(offset, CONFIG_FLASH_ERASE_SIZE)) {
rv = EC_ERROR_ACCESS_DENIED;
break;
}
/*
* Reload the watchdog timer, so that erasing many flash pages
* doesn't cause a watchdog reset. May not need this now that
* we're using msleep() below.
*/
watchdog_reload();
/* Enable write */
rv = flash_write_enable();
if (rv)
break;
/* Set erase address */
flash_set_address(offset);
/* Start erase */
flash_execute_cmd(CMD_SECTOR_ERASE, MASK_CMD_ADR);
/* Wait erase completed */
rv = flash_wait_ready(FLASH_ABORT_TIMEOUT);
if (rv)
break;
}
/* Enable tri-state */
TRISTATE_FLASH(1);
/* Unlock physical flash operations */
flash_lock_mapped_storage(0);
return rv;
}
int flash_physical_write(int offset, int size, const char *data)
{
int dest_addr = offset;
int write_len;
int rv;
/* Fail if offset, size, and data aren't at least word-aligned */
if ((offset | size
| (uint32_t)(uintptr_t)data) & (CONFIG_FLASH_WRITE_SIZE - 1))
return EC_ERROR_INVAL;
/* check protection */
if (all_protected)
return EC_ERROR_ACCESS_DENIED;
/* Lock physical flash operations */
flash_lock_mapped_storage(1);
/* Disable tri-state */
TRISTATE_FLASH(0);
while (size > 0) {
/* First write multiples of 256, then (size % 256) last */
write_len = ((size % CONFIG_FLASH_WRITE_IDEAL_SIZE) == size) ?
size : CONFIG_FLASH_WRITE_IDEAL_SIZE;
/* check protection */
if (flash_check_prot_range(dest_addr, write_len)) {
rv = EC_ERROR_ACCESS_DENIED;
break;
}
rv = flash_program_bytes(dest_addr, write_len, data);
if (rv)
break;
data += write_len;
dest_addr += write_len;
size -= write_len;
}
/* Enable tri-state */
TRISTATE_FLASH(1);
/* Unlock physical flash operations */
flash_lock_mapped_storage(0);
return rv;
}
int flash_physical_erase(int offset, int size)
{
/* check protection */
if (all_protected)
return EC_ERROR_ACCESS_DENIED;
/* Disable tri-state */
TRISTATE_FLASH(0);
/* Alignment has been checked in upper layer */
for (; size > 0; size -= CONFIG_FLASH_ERASE_SIZE,
offset += CONFIG_FLASH_ERASE_SIZE) {
/* Do nothing if already erased */
if (flash_is_erased(offset, CONFIG_FLASH_ERASE_SIZE))
continue;
/* check protection */
if (flash_check_prot_range(offset, CONFIG_FLASH_ERASE_SIZE))
return EC_ERROR_ACCESS_DENIED;
/*
* Reload the watchdog timer, so that erasing many flash pages
* doesn't cause a watchdog reset. May not need this now that
* we're using msleep() below.
*/
watchdog_reload();
/* Enable write */
flash_write_enable();
/* Set erase address */
flash_set_address(offset);
/* Start erase */
flash_execute_cmd(CMD_SECTOR_ERASE, MASK_CMD_ADR);
/* Wait erase completed */
flash_wait_ready();
}
/* Enable tri-state */
TRISTATE_FLASH(1);
return EC_SUCCESS;
}
