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;
}
static int flash_program_bytes(uint32_t offset, uint32_t bytes,
const uint8_t const *data)
{
int write_size;
int rv;
while (bytes > 0) {
/* Write length can not go beyond the end of the flash page */
write_size = MIN(bytes, CONFIG_FLASH_WRITE_IDEAL_SIZE -
(offset & (CONFIG_FLASH_WRITE_IDEAL_SIZE - 1)));
/* Enable write */
rv = flash_write_enable();
if (rv)
return rv;
/* Burst UMA transaction */
flash_burst_write(offset, write_size, data);
/* Wait write completed */
rv = flash_wait_ready(FLASH_ABORT_TIMEOUT);
if (rv)
return rv;
data += write_size;
offset += write_size;
bytes -= write_size;
}
return rv;
}
