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flash: change stm32lx driver probe behaviour 

Currently stm32lx flash driver will remove the readout protection if set
during a probe.

This may not be what the user wants, so let them decide.

Change-Id: I8575e3b339b10a4f7bac57cca9586dcab513d347
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/465
Tested-by: jenkins
This commit is contained in:
Spencer Oliver 2012-02-17 14:33:48 +00:00
parent 6dfd56a743
commit 38dc253001
1 changed files with 0 additions and 59 deletions
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59
src/flash/nor/stm32lx.c
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@ -463,7 +463,6 @@ static int stm32lx_probe(struct flash_bank *bank)
int i;
uint16_t flash_size;
uint32_t device_id;
uint32_t reg32;
stm32lx_info->probed = 0;
@ -479,64 +478,6 @@ static int stm32lx_probe(struct flash_bank *bank)
return ERROR_FAIL;
}
/* Read the RDP byte and check if it is 0xAA */
uint8_t rdp;
retval = target_read_u32(target, FLASH_OBR, &reg32);
if (retval != ERROR_OK)
return retval;
rdp = reg32 & 0xFF;
if (rdp != 0xAA) {
/*
* Unlocking the option byte is done by unlocking the PECR, then
* by writing the 2 option byte keys to OPTKEYR
*/
/* To unlock the PECR write the 2 PEKEY to the PEKEYR register */
retval = target_write_u32(target, FLASH_PEKEYR, PEKEY1);
if (retval != ERROR_OK)
return retval;
retval = target_write_u32(target, FLASH_PEKEYR, PEKEY2);
if (retval != ERROR_OK)
return retval;
/* Make sure it worked */
retval = target_read_u32(target, FLASH_PECR, &reg32);
if (retval != ERROR_OK)
return retval;
if (reg32 & FLASH_PECR__PELOCK)
return ERROR_FLASH_OPERATION_FAILED;
retval = target_write_u32(target, FLASH_OPTKEYR, OPTKEY1);
if (retval != ERROR_OK)
return retval;
retval = target_write_u32(target, FLASH_OPTKEYR, OPTKEY2);
if (retval != ERROR_OK)
return retval;
retval = target_read_u32(target, FLASH_PECR, &reg32);
if (retval != ERROR_OK)
return retval;
if (reg32 & FLASH_PECR__OPTLOCK) {
LOG_ERROR("OPTLOCK is not cleared");
return ERROR_FLASH_OPERATION_FAILED;
}
/* Then, write RDP to 0x00 to set level 1 */
reg32 = ((~0xAA) << 16) | (0xAA);
retval = target_write_u32(target, OB_RDP, reg32);
if (retval != ERROR_OK)
return retval;
/* Set Automatic update of the option byte, by setting OBL_LAUNCH in FLASH_PECR */
reg32 = FLASH_PECR__OBL_LAUNCH;
retval = target_write_u32(target, FLASH_PECR, reg32);
if (retval != ERROR_OK)
return retval;
}
/* get flash size from target. */
retval = target_read_u16(target, F_SIZE, &flash_size);
if (retval != ERROR_OK)