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stm32lx: Add support for lock/unlock (RDP Level 0<->1) 

Change-Id: Iecc356373e084056d048d92820062483cac3c8ec
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3234
Tested-by: jenkins
Reviewed-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
__archive__
Andreas Fritiofson 2016-02-09 17:50:47 +01:00 committed by Freddie Chopin
parent b200dea387
commit 0534a5e0ab
1 changed files with 106 additions and 17 deletions
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123
src/flash/nor/stm32lx.c
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@ -103,6 +103,8 @@ 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_lock(struct flash_bank *bank);
static int stm32lx_unlock(struct flash_bank *bank);
static int stm32lx_mass_erase(struct flash_bank *bank);
static int stm32lx_wait_until_bsy_clear_timeout(struct flash_bank *bank, int timeout);
@ -332,6 +334,46 @@ COMMAND_HANDLER(stm32lx_handle_mass_erase_command)
return retval;
}
COMMAND_HANDLER(stm32lx_handle_lock_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 (ERROR_OK != retval)
return retval;
retval = stm32lx_lock(bank);
if (retval == ERROR_OK)
command_print(CMD_CTX, "STM32Lx locked, takes effect after power cycle.");
else
command_print(CMD_CTX, "STM32Lx lock failed");
return retval;
}
COMMAND_HANDLER(stm32lx_handle_unlock_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 (ERROR_OK != retval)
return retval;
retval = stm32lx_unlock(bank);
if (retval == ERROR_OK)
command_print(CMD_CTX, "STM32Lx unlocked, takes effect after power cycle.");
else
command_print(CMD_CTX, "STM32Lx unlock failed");
return retval;
}
static int stm32lx_protect_check(struct flash_bank *bank)
{
int retval;
@ -945,6 +987,20 @@ static const struct command_registration stm32lx_exec_command_handlers[] = {
.usage = "bank_id",
.help = "Erase entire flash device. including available EEPROM",
},
{
.name = "lock",
.handler = stm32lx_handle_lock_command,
.mode = COMMAND_EXEC,
.usage = "bank_id",
.help = "Increase the readout protection to Level 1.",
},
{
.name = "unlock",
.handler = stm32lx_handle_unlock_command,
.mode = COMMAND_EXEC,
.usage = "bank_id",
.help = "Lower the readout protection from Level 1 to 0.",
},
COMMAND_REGISTRATION_DONE
};
@ -1278,6 +1334,54 @@ static int stm32lx_obl_launch(struct flash_bank *bank)
return tries ? ERROR_OK : ERROR_FAIL;
}
static int stm32lx_lock(struct flash_bank *bank)
{
int retval;
struct target *target = bank->target;
if (target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
retval = stm32lx_unlock_options_bytes(bank);
if (retval != ERROR_OK)
return retval;
/* set the RDP protection level to 1 */
retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR1);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int stm32lx_unlock(struct flash_bank *bank)
{
int retval;
struct target *target = bank->target;
if (target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
retval = stm32lx_unlock_options_bytes(bank);
if (retval != ERROR_OK)
return retval;
/* set the RDP protection level to 0 */
retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR0);
if (retval != ERROR_OK)
return retval;
retval = stm32lx_wait_until_bsy_clear_timeout(bank, 30000);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int stm32lx_mass_erase(struct flash_bank *bank)
{
int retval;
@ -1292,13 +1396,7 @@ static int stm32lx_mass_erase(struct flash_bank *bank)
stm32lx_info = bank->driver_priv;
retval = stm32lx_unlock_options_bytes(bank);
if (retval != ERROR_OK)
return retval;
/* mass erase flash memory */
/* set the RDP protection level to 1 */
retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR1);
retval = stm32lx_lock(bank);
if (retval != ERROR_OK)
return retval;
@ -1306,16 +1404,7 @@ static int stm32lx_mass_erase(struct flash_bank *bank)
if (retval != ERROR_OK)
return retval;
retval = stm32lx_unlock_options_bytes(bank);
if (retval != ERROR_OK)
return retval;
/* set the RDP protection level to 0 */
retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR0);
if (retval != ERROR_OK)
return retval;
retval = stm32lx_wait_until_bsy_clear_timeout(bank, 30000);
retval = stm32lx_unlock(bank);
if (retval != ERROR_OK)
return retval;