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stm32lx flash: fix flash size for Medium+ devices 

Unfortunately the Medium+ density and 0x436 devices have their F_SIZE register
at a different location: 0x1FF800CC instead of 0x1FF8004C.  Fix this for
the 0x427 Medium+ devices and also the 0x436 devices.  Furthermore, for
0x436 devices the flash size is reported as a 0 or 1 code rather than
the size in Kb.  Please see RM0038 r8 or newer for an explanation, as
noted in the comments.

Change-Id: Ie03b1e119a61f2a854bc2ccc5f90ce3e8852e272
Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
Reviewed-on: http://openocd.zylin.com/1522
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
This commit is contained in:
Andrey Yurovsky 2013-07-22 17:26:02 -07:00 committed by Spencer Oliver
parent f7fed92a4a
commit 8f444e2247
1 changed files with 18 additions and 2 deletions
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20
src/flash/nor/stm32lx.c
View File

@ -88,6 +88,7 @@
/* other registers */
#define DBGMCU_IDCODE 0xE0042000
#define F_SIZE 0x1FF8004C
#define F_SIZE_MP 0x1FF800CC /* on 0x427 Medium+ and 0x436 HD devices */
/* Constants */
#define FLASH_PAGE_SIZE 256
@ -554,8 +555,23 @@ static int stm32lx_probe(struct flash_bank *bank)
return ERROR_FAIL;
}
/* Get the flash size from target. */
retval = target_read_u16(target, F_SIZE, &flash_size_in_kb);
/* Get the flash size from target. 0x427 and 0x436 devices use a
* different location for the Flash Size register, please see RM0038 r8 or
* newer. */
if ((device_id & 0xfff) == 0x427 || (device_id & 0xfff) == 0x436)
retval = target_read_u16(target, F_SIZE_MP, &flash_size_in_kb);
else
retval = target_read_u16(target, F_SIZE, &flash_size_in_kb);
/* 0x436 devices report their flash size as a 0 or 1 code indicating 384K
* or 256K, respectively. Please see RM0038 r8 or newer and refer to
* section 30.1.1. */
if (retval == ERROR_OK && (device_id & 0xfff) == 0x436) {
if (flash_size_in_kb == 0)
flash_size_in_kb = 384;
else if (flash_size_in_kb == 1)
flash_size_in_kb = 256;
}
/* Failed reading flash size or flash size invalid (early silicon),
* default to max target family */