flash: New Spansion FM4 flash driver90/2190/15
commit43ff5acd45017fd9828cc56f54b929e600956c3b
authorAndreas Färber <afaerber@suse.de>
Mon, 20 Apr 2015 00:51:23 +0000 (20 02:51 +0200)
committerAndreas Fritiofson <andreas.fritiofson@gmail.com>
Mon, 29 Feb 2016 19:40:20 +0000 (29 19:40 +0000)
treef6642b088a641491ce0c8de96423cb1f45b6f1f2
parent13618ab99426b0786d6825e5816a3b082f8aa973
flash: New Spansion FM4 flash driver

The Spansion FM4 family of microcontrollers does not offer a way to
identify the chip model nor the flash size, except for Dual Flash vs.
regular layout. Therefore the family is passed as argument and
wildcard-matched - MB9BFx6x and S6E2CC families are supported.

Iterations showed that ...
1) Just doing the flash command sequence from SRAM loader code for each
half-word took 20 minutes for an 8 KB block.
2) Doing the busy-wait in the loader merely reduced the time to 19 minutes.
3) Significant performance gains were achieved by looping in loader code
rather than in OpenOCD and by maximizing the batch size across sectors,
getting us down to ~2 seconds for 8 KB and ~2.5 minutes for 1.1 MB.
(Tested with SK-FM4-176L-S6E2CC-ETH v11, CMSIS-DAP v23.)

gcc, objcopy -Obinary and bin2char.sh are used for automating the
integration of hand-written assembler snippets.

Change-Id: I092c81074662534f50b71b91d54eb8e0098fec76
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/2190
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
15 files changed:
README
contrib/loaders/flash/fm4/Makefile [new file with mode: 0644]
contrib/loaders/flash/fm4/erase.S [new file with mode: 0644]
contrib/loaders/flash/fm4/erase.inc [new file with mode: 0644]
contrib/loaders/flash/fm4/fm4.h [new file with mode: 0644]
contrib/loaders/flash/fm4/write.S [new file with mode: 0644]
contrib/loaders/flash/fm4/write.inc [new file with mode: 0644]
doc/openocd.texi
src/flash/nor/Makefile.am
src/flash/nor/drivers.c
src/flash/nor/fm4.c [new file with mode: 0644]
tcl/board/spansion_sk-fm4-176l-s6e2cc.cfg
tcl/board/spansion_sk-fm4-u120-9b560.cfg
tcl/target/fm4_mb9bf.cfg
tcl/target/fm4_s6e2cc.cfg