+static int stm32l4_protect(struct flash_bank *bank, int set, unsigned int first, unsigned int last)
+{
+ struct target *target = bank->target;
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+
+ if (stm32l4_is_otp(bank)) {
+ LOG_ERROR("cannot protect/unprotect OTP memory");
+ return ERROR_FLASH_OPER_UNSUPPORTED;
+ }
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* refresh the sectors' protection */
+ int ret = stm32l4_protect_check(bank);
+ if (ret != ERROR_OK)
+ return ret;
+
+ /* the requested sectors could be located into bank1 and/or bank2 */
+ if (last < stm32l4_info->bank1_sectors) {
+ return stm32l4_protect_same_bank(bank, STM32_BANK1, set, first, last);
+ } else if (first >= stm32l4_info->bank1_sectors) {
+ return stm32l4_protect_same_bank(bank, STM32_BANK2, set, first, last);
+ } else {
+ ret = stm32l4_protect_same_bank(bank, STM32_BANK1, set, first, stm32l4_info->bank1_sectors - 1);
+ if (ret != ERROR_OK)
+ return ret;
+
+ return stm32l4_protect_same_bank(bank, STM32_BANK2, set, stm32l4_info->bank1_sectors, last);
+ }
+}
+