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flash: stm32f2/f4/f7: Add One-Time-Porgrammable (OTP) support

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The OTP is part of the flash memory. It has 512 (1024 for F7) bytes
and is organized in 16 sectors with 32 (64 for F7) bytes each.
The OTP is exposed as separate flash bank 1 and can be used
with the usual flash commands.

Writing the OTP can be done as follows:

> stm32f2x otp 1 enable
> flash write bank 1 foo.bin 0
> mdw 0x1fff7800 4
> verify_image foo.bin 0x1fff7800
> stm32f2x otp 1 disable

Note: This patch is largely a rebase/cleanup of a patch
from 2012 by Laurent Charpentier and he did most of the work.

No new Clang-Analyzer warnings.

Change-Id: I5e6371f6a7c7a9929c1d7907d6ba4724f9d20d97
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Reviewed-on: http://openocd.zylin.com/829
Tested-by: jenkins
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Moritz Fischer
2019-01-21 09:24:12 -08:00
committed by Tomas Vanek
parent 2c76f1ac0e
commit f21c12abec
5 changed files with 226 additions and 10 deletions
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11
doc/openocd.texi
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@@ -6645,6 +6645,17 @@ the chip identification register, and autoconfigures itself.
flash bank $_FLASHNAME stm32f2x 0 0 0 0 $_TARGETNAME
@end example
If you use OTP (One-Time Programmable) memory define it as a second bank
as per the following example.
@example
flash bank $_FLASHNAME stm32f2x 0x1FFF7800 0 0 0 $_TARGETNAME
@end example
@deffn Command {stm32f2x otp } num (@option{enable}|@option{disable}|@option{show})
Enables or disables OTP write commands for bank @var{num}.
The @var{num} parameter is a value shown by @command{flash banks}.
@end deffn
Note that some devices have been found that have a flash size register that contains
an invalid value, to workaround this issue you can override the probed value used by
the flash driver.