stm32f2x: Fix byte order bug.

Do not use buf_set_u32 on integers; they're not buffers.
If using buf_set_u32 on integers, bytes will be exchanged on Big Endian targets.
In this particular case, FLASH_OPTCR was incorrectly written, causing it to often
contain one of these values: 0x00aaaae1, 0x00aaffef, 0x00ffabe1 or 0x00abffe1.
This write-protected the device before flash-programming, causing this command...
flash write_image erase unlock myfile.elf
... to fail, complaining about write-protection.
Repeating the above command would change the OPTCR register each time.
After applying this patch, the OPTCR remains "unchanged".

Change-Id: I73d510fcc2e81a01973ad5c6e1aa22715ebd2743
Signed-off-by: Jens Bauer <jens@gpio.dk>
Reviewed-on: http://openocd.zylin.com/2466
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>

diff --git a/src/flash/nor/stm32f2x.c b/src/flash/nor/stm32f2x.c
index 8f35845b4516caf2230d64fd9cec2866be08b6f6..422eac1b4f28f3cf4b4fb67044497c16e72c264c 100644 (file)
--- a/src/flash/nor/stm32f2x.c
+++ b/src/flash/nor/stm32f2x.c
@@ -344,8 +344,8 @@ static int stm32x_write_options(struct flash_bank *bank)
 
        /* rebuild option data */
        optiondata = stm32x_info->option_bytes.user_options;
-       buf_set_u32(&optiondata, 8, 8, stm32x_info->option_bytes.RDP);
-       buf_set_u32(&optiondata, 16, 12, stm32x_info->option_bytes.protection);
+       optiondata |= stm32x_info->option_bytes.RDP << 8;
+       optiondata |= (stm32x_info->option_bytes.protection & 0x0fff) << 16;
 
        /* program options */
        retval = target_write_u32(target, STM32_FLASH_OPTCR, optiondata);
@@ -355,7 +355,7 @@ static int stm32x_write_options(struct flash_bank *bank)
        if (stm32x_info->has_large_mem) {
 
                uint32_t optiondata2 = 0;
-               buf_set_u32(&optiondata2, 16, 12, stm32x_info->option_bytes.protection >> 12);
+               optiondata2 |= (stm32x_info->option_bytes.protection & 0x00fff000) << 4;
                retval = target_write_u32(target, STM32_FLASH_OPTCR1, optiondata2);
                if (retval != ERROR_OK)
                        return retval;