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flash: use stm32f2x flash size register 

Use the flash size register to calculate flash info.

Change-Id: Ia230db8a08d440710c030a9e5001f20561c9f420
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/337
Tested-by: jenkins
Reviewed-by: Mathias Küster <kesmtp@freenet.de>
__archive__
Spencer Oliver 2012-01-04 22:43:59 +00:00
parent a77ba6a8b4
commit e024bcc3d9
1 changed files with 34 additions and 18 deletions
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52
src/flash/nor/stm32f2x.c
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@ -575,7 +575,7 @@ static int stm32x_probe(struct flash_bank *bank)
struct target *target = bank->target;
struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
int i;
uint16_t num_pages;
uint16_t flash_size_in_kb;
uint32_t device_id;
uint32_t base_address = 0x08000000;
@ -587,22 +587,38 @@ static int stm32x_probe(struct flash_bank *bank)
return retval;
LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
if ((device_id & 0x7ff) != 0x411)
{
LOG_WARNING("Cannot identify target as a STM32 family, try the other STM32 drivers.");
/* get flash size from target. */
retval = target_read_u16(target, 0x1FFF7A10, &flash_size_in_kb);
if (retval != ERROR_OK) {
LOG_WARNING("failed reading flash size, default to max target family");
/* failed reading flash size, default to max target family */
flash_size_in_kb = 0xffff;
}
if ((device_id & 0x7ff) == 0x411) {
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 512k flash");
flash_size_in_kb = 512;
}
} else {
LOG_WARNING("Cannot identify target as a STM32 family.");
return ERROR_FAIL;
}
/* sectors sizes vary, handle this in a different code path
* than the rest.
*/
// Uhhh.... what to use here?
LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
/* calculate numbers of pages*/
num_pages = 4 + 1 + 7;
/* did we assign flash size? */
assert(flash_size_in_kb != 0xffff);
if (bank->sectors)
{
/* calculate numbers of pages */
int num_pages = (flash_size_in_kb / 128) + 4;
/* check that calculation result makes sense */
assert(num_pages > 0);
if (bank->sectors) {
free(bank->sectors);
bank->sectors = NULL;
}
@ -610,20 +626,20 @@ static int stm32x_probe(struct flash_bank *bank)
bank->base = base_address;
bank->num_sectors = num_pages;
bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
bank->size = 0;
/* fixed memory */
setup_sector(bank, 0, 4, 16 * 1024);
setup_sector(bank, 4, 1, 64 * 1024);
setup_sector(bank, 4+1, 7, 128 * 1024);
for (i = 0; i < num_pages; i++)
{
/* dynamic memory */
setup_sector(bank, 4 + 1, num_pages - 5, 128 * 1024);
for (i = 0; i < num_pages; i++) {
bank->sectors[i].is_erased = -1;
bank->sectors[i].is_protected = 0;
}
LOG_INFO("flash size = %dkBytes", bank->size / 1024);
stm32x_info->probed = 1;
return ERROR_OK;