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flash/nor/stm32lx: Add 'option_load' command

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Add command to re-load option bytes.

Tested with STM32L072CZ and STM32L152RCT6.

Change-Id: I5653f2222a48af1fe0332d4bdc3552e481e375d0
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/8998
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Marc Schink
2025-07-14 07:01:58 +00:00
committed by Tomas Vanek
parent 1ea763d23c
commit a1c7cd4fef
2 changed files with 38 additions and 1 deletions
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33
src/flash/nor/stm32lx.c
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@@ -90,6 +90,7 @@ static int stm32lx_lock_program_memory(struct flash_bank *bank);
static int stm32lx_enable_write_half_page(struct flash_bank *bank);
static int stm32lx_erase_sector(struct flash_bank *bank, int sector);
static int stm32lx_wait_until_bsy_clear(struct flash_bank *bank);
static int stm32lx_obl_launch(struct flash_bank *bank);
static int stm32lx_lock(struct flash_bank *bank);
static int stm32lx_unlock(struct flash_bank *bank);
static int stm32lx_mass_erase(struct flash_bank *bank);
@@ -354,6 +355,26 @@ COMMAND_HANDLER(stm32lx_handle_unlock_command)
return retval;
}
COMMAND_HANDLER(stm32lx_handle_option_load_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
struct flash_bank *bank;
int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
if (retval != ERROR_OK)
return retval;
retval = stm32lx_obl_launch(bank);
if (retval != ERROR_OK) {
command_print(CMD, "failed to load option bytes");
return retval;
}
return ERROR_OK;
}
static int stm32lx_protect_check(struct flash_bank *bank)
{
int retval;
@@ -921,6 +942,13 @@ static const struct command_registration stm32lx_exec_command_handlers[] = {
.usage = "bank_id",
.help = "Lower the readout protection from Level 1 to 0.",
},
{
.name = "option_load",
.handler = stm32lx_handle_option_load_command,
.mode = COMMAND_EXEC,
.usage = "bank_id",
.help = "Force re-load of device options (will cause device reset).",
},
COMMAND_REGISTRATION_DONE
};
@@ -1238,7 +1266,10 @@ static int stm32lx_obl_launch(struct flash_bank *bank)
{
struct target *target = bank->target;
struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int retval;
int retval = stm32lx_unlock_options_bytes(bank);
if (retval != ERROR_OK)
return retval;
/* This will fail as the target gets immediately rebooted */
target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,