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flash: reduce code duplication in stm32 flash probe 

Remove a lot of the repetitive code in stm32f1x flash probe by converting
the large if-selector to a switch, moving the common checks outside it and
concentrating the failure handling to a single point.

Do the same with stm32f2x and stm32lx for consistency.

Change-Id: Ic0ecfb1533c49f5d2108cda5fd20c8372d7c71ef
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/746
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
This commit is contained in:
Andreas Fritiofson 2012-07-17 00:43:46 +02:00 committed by Freddie Chopin
parent 38e44d1361
commit 9a8edbfa8b
3 changed files with 107 additions and 188 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

199
src/flash/nor/stm32f1x.c
View File

@ -880,6 +880,7 @@ static int stm32x_probe(struct flash_bank *bank)
struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
int i;
uint16_t flash_size_in_kb;
uint16_t max_flash_size_in_kb;
uint32_t device_id;
int page_size;
uint32_t base_address = 0x08000000;
@ -894,116 +895,76 @@ static int stm32x_probe(struct flash_bank *bank)
LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
/* get flash size from target. */
retval = stm32x_get_flash_size(bank, &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;
/* set page size, protection granularity and max flash size depending on family */
switch (device_id & 0xfff) {
case 0x410: /* medium density */
page_size = 1024;
stm32x_info->ppage_size = 4;
max_flash_size_in_kb = 128;
break;
case 0x412: /* low density */
page_size = 1024;
stm32x_info->ppage_size = 4;
max_flash_size_in_kb = 32;
break;
case 0x414: /* high density */
page_size = 2048;
stm32x_info->ppage_size = 2;
max_flash_size_in_kb = 512;
break;
case 0x418: /* connectivity line density */
page_size = 2048;
stm32x_info->ppage_size = 2;
max_flash_size_in_kb = 256;
break;
case 0x420: /* value line density */
page_size = 1024;
stm32x_info->ppage_size = 4;
max_flash_size_in_kb = 128;
break;
case 0x422: /* stm32f30x */
page_size = 2048;
stm32x_info->ppage_size = 2;
max_flash_size_in_kb = 256;
break;
case 0x428: /* value line High density */
page_size = 2048;
stm32x_info->ppage_size = 4;
max_flash_size_in_kb = 128;
break;
case 0x430: /* xl line density (dual flash banks) */
page_size = 2048;
stm32x_info->ppage_size = 2;
max_flash_size_in_kb = 1024;
stm32x_info->has_dual_banks = true;
break;
case 0x432: /* stm32f37x */
page_size = 2048;
stm32x_info->ppage_size = 2;
max_flash_size_in_kb = 256;
break;
case 0x440: /* stm32f0x */
page_size = 1024;
stm32x_info->ppage_size = 4;
max_flash_size_in_kb = 64;
break;
default:
LOG_WARNING("Cannot identify target as a STM32 family.");
return ERROR_FAIL;
}
/* some variants read 0 for flash size register
* use a max flash size as a default */
if (flash_size_in_kb == 0)
flash_size_in_kb = 0xffff;
/* get flash size from target. */
retval = stm32x_get_flash_size(bank, &flash_size_in_kb);
if ((device_id & 0xfff) == 0x410) {
/* medium density - we have 1k pages
* 4 pages for a protection area */
page_size = 1024;
stm32x_info->ppage_size = 4;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors incorrect on revA */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 128k flash");
flash_size_in_kb = 128;
}
} else if ((device_id & 0xfff) == 0x412) {
/* low density - we have 1k pages
* 4 pages for a protection area */
page_size = 1024;
stm32x_info->ppage_size = 4;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors incorrect on revA */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 32k flash");
flash_size_in_kb = 32;
}
} else if ((device_id & 0xfff) == 0x414) {
/* high density - we have 2k pages
* 2 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 2;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors incorrect on revZ */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 512k flash");
flash_size_in_kb = 512;
}
} else if ((device_id & 0xfff) == 0x418) {
/* connectivity line density - we have 2k pages
* 2 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 2;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors incorrect on revZ */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 256k flash");
flash_size_in_kb = 256;
}
} else if ((device_id & 0xfff) == 0x420) {
/* value line density - we have 1k pages
* 4 pages for a protection area */
page_size = 1024;
stm32x_info->ppage_size = 4;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 128k flash");
flash_size_in_kb = 128;
}
} else if ((device_id & 0xfff) == 0x422) {
/* stm32f30x - we have 2k pages
* 2 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 2;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 256k flash");
flash_size_in_kb = 256;
}
} else if ((device_id & 0xfff) == 0x428) {
/* value line High density - we have 2k pages
* 4 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 4;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 128k flash");
flash_size_in_kb = 128;
}
} else if ((device_id & 0xfff) == 0x430) {
/* xl line density - we have 2k pages
* 2 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 2;
stm32x_info->has_dual_banks = true;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 1024k flash");
flash_size_in_kb = 1024;
}
/* failed reading flash size or flash size invalid (early silicon),
* default to max target family */
if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
max_flash_size_in_kb);
flash_size_in_kb = max_flash_size_in_kb;
}
if (stm32x_info->has_dual_banks) {
/* split reported size into matching bank */
if (bank->base != 0x08080000) {
/* bank 0 will be fixed 512k */
@ -1014,32 +975,6 @@ static int stm32x_probe(struct flash_bank *bank)
stm32x_info->register_base = FLASH_REG_BASE_B1;
base_address = 0x08080000;
}
} else if ((device_id & 0xfff) == 0x432) {
/* stm32f37x - we have 2k pages
* 2 pages for a protection area */
page_size = 2048;
stm32x_info->ppage_size = 2;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 256k flash");
flash_size_in_kb = 256;
}
} else if ((device_id & 0xfff) == 0x440) {
/* stm32f0x - we have 1k pages
* 4 pages for a protection area */
page_size = 1024;
stm32x_info->ppage_size = 4;
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors incorrect on revZ */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 64k flash");
flash_size_in_kb = 64;
}
} else {
LOG_WARNING("Cannot identify target as a STM32 family.");
return ERROR_FAIL;
}
LOG_INFO("flash size = %dkbytes", flash_size_in_kb);

47
src/flash/nor/stm32f2x.c
View File

@ -586,6 +586,7 @@ static int stm32x_probe(struct flash_bank *bank)
struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
int i;
uint16_t flash_size_in_kb;
uint16_t max_flash_size_in_kb;
uint32_t device_id;
uint32_t base_address = 0x08000000;
@ -597,38 +598,28 @@ static int stm32x_probe(struct flash_bank *bank)
return retval;
LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
/* get flash size from target. */
retval = target_read_u16(target, 0x1FFF7A22, &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;
}
/* some variants read 0 for flash size register
* use a max flash size as a default */
if (flash_size_in_kb == 0)
flash_size_in_kb = 0xffff;
if ((device_id & 0xfff) == 0x411) {
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 1024k flash");
flash_size_in_kb = 1024;
}
} else if ((device_id & 0xfff) == 0x413) {
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 1024k flash");
flash_size_in_kb = 1024;
}
} else {
/* set max flash size depending on family */
switch (device_id & 0xfff) {
case 0x411:
case 0x413:
max_flash_size_in_kb = 1024;
break;
default:
LOG_WARNING("Cannot identify target as a STM32 family.");
return ERROR_FAIL;
}
/* get flash size from target. */
retval = target_read_u16(target, 0x1FFF7A22, &flash_size_in_kb);
/* failed reading flash size or flash size invalid (early silicon),
* default to max target family */
if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
max_flash_size_in_kb);
flash_size_in_kb = max_flash_size_in_kb;
}
LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
/* did we assign flash size? */

49
src/flash/nor/stm32lx.c
View File

@ -463,6 +463,7 @@ static int stm32lx_probe(struct flash_bank *bank)
struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int i;
uint16_t flash_size_in_kb;
uint16_t max_flash_size_in_kb;
uint32_t device_id;
stm32lx_info->probed = 0;
@ -474,38 +475,30 @@ static int stm32lx_probe(struct flash_bank *bank)
LOG_DEBUG("device id = 0x%08" PRIx32 "", device_id);
/* get flash size from target. */
retval = target_read_u16(target, F_SIZE, &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;
}
/* some variants read 0 for flash size register
* use a max flash size as a default */
if (flash_size_in_kb == 0)
flash_size_in_kb = 0xffff;
if ((device_id & 0xfff) == 0x416) {
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 128k flash");
flash_size_in_kb = 128;
}
} else if ((device_id & 0xfff) == 0x436) {
/* check for early silicon */
if (flash_size_in_kb == 0xffff) {
/* number of sectors may be incorrect on early silicon */
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 384k flash");
flash_size_in_kb = 384;
}
} else {
/* set max flash size depending on family */
switch (device_id & 0xfff) {
case 0x416:
max_flash_size_in_kb = 128;
break;
case 0x436:
max_flash_size_in_kb = 384;
break;
default:
LOG_WARNING("Cannot identify target as a STM32L family.");
return ERROR_FAIL;
}
/* get flash size from target. */
retval = target_read_u16(target, F_SIZE, &flash_size_in_kb);
/* failed reading flash size or flash size invalid (early silicon),
* default to max target family */
if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
max_flash_size_in_kb);
flash_size_in_kb = max_flash_size_in_kb;
}
/* STM32L - we have 32 sectors, 16 pages per sector -> 512 pages
* 16 pages for a protection area */