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flash/nor/psoc4: adjust flash size limited by wounding

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All credit goes to Dmitry Grinberg
http://dmitry.gr/index.php?r=05.Projects&proj=24.%20PSoC4%20confidential

Change-Id: Iae8fd6f11a7f62e8ffe970473688f6fac5a0a261
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4324
Tested-by: jenkins
This commit is contained in:
Tomas Vanek 2018-01-06 12:10:12 +01:00
parent bb9d9c6026
commit e8b2e62d45
1 changed files with 27 additions and 0 deletions
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27
src/flash/nor/psoc4.c
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@ -78,6 +78,8 @@
CYBL10x6x, CY8C4127_BL, CY8C4247_BL Programming Specifications
Document No. 001-91508 Rev. *B September 22, 2014
http://dmitry.gr/index.php?r=05.Projects&proj=24.%20PSoC4%20confidential
*/
/* register locations */
@ -717,6 +719,22 @@ cleanup:
}
/* Due to Cypress's method of market segmentation some devices
* have accessible only 1/2, 1/4 or 1/8 of SPCIF described flash */
static int psoc4_test_flash_wounding(struct target *target, uint32_t flash_size)
{
int retval, i;
for (i = 3; i >= 1; i--) {
uint32_t addr = flash_size >> i;
uint32_t dummy;
retval = target_read_u32(target, addr, &dummy);
if (retval != ERROR_OK)
return i;
}
return 0;
}
static int psoc4_probe(struct flash_bank *bank)
{
struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
@ -798,6 +816,15 @@ static int psoc4_probe(struct flash_bank *bank)
if (num_macros != (num_rows + PSOC4_ROWS_PER_MACRO - 1) / PSOC4_ROWS_PER_MACRO)
LOG_WARNING("Number of macros does not correspond with flash size!");
if (!psoc4_info->legacy_family) {
int wounding = psoc4_test_flash_wounding(target, num_rows * row_size);
if (wounding > 0) {
flash_size_in_kb = flash_size_in_kb >> wounding;
num_rows = num_rows >> wounding;
LOG_INFO("WOUNDING detected: accessible flash size %" PRIu32 " kbytes", flash_size_in_kb);
}
}
if (bank->sectors) {
free(bank->sectors);
}