Initial release of Flash bank driver for Bouffalo chips.
The driver currently supports BL602, BL702, BL702L series of chips.
Similar SFlash core is inside of BL808, BL606P and BL616 series,
so those might be supported in future as well.
With adapter speed set to 8000, it can reach speed 140 KiB/s.
Since chips have eXecute In Place support, and they also require
boot config in Flash at offset 0x0, it's required to have properly
crafted linker script, so OpenOCD knows where to write firmware
through gdb.
There is required flash bank parameter, which specifies the chip type.
This is required because BL702 and BL702L have same TAP ID CODE, and
there are no usable indicators to use for automatic chip type
recognition in the chip.
Change-Id: Id57336d447be3c608b39ba3ed143527bfdc0af98
Signed-off-by: Marek Kraus <gamelaster@outlook.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8527
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
BL602, BL702 and BL702L series of chips are sharing same architecture,
so they all need same software reset mechanism as well.
Only difference (in terms of configuration needed for JTAG) are TAP ID,
workarea address and size. This is addressed by creating bl602_common.cfg
tcl file, which contains all those common stuff between the chips.
The script is prefixed by bl602, as this was
first *publicly* available chip from Bouffalo with this architecture.
This patch also improves reset mechanism. Previous reset mechanism did not
worked properly when slower JTAG adapter was used (it attached too late).
New reset mechanism uses various methods to keep CPU in BootROM, until
the JTAG adapter does not attach again after reset. Additionally,
we trigger SW Reset by directly using DMI commands to write to register
with system bus method, to avoid getting error about unsuccessful write.
The new method works on both FT232H (8MHz JTAG clock) and
unnamed CMSIS-DAP dongle (1.5MHz JTAG clock).
Change-Id: I5be3694927793fd3f64c9ed4ee6ded2db0d25cae
Signed-off-by: Marek Kraus <gamelaster@outlook.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8593
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
