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(parent: 944d3e6) | patch
stlink: fix handling of DPv1 and DPv2 banked registers 78/4978/6
authorAntonio Borneo <borneo.antonio@gmail.com>
Thu, 28 Feb 2019 09:28:26 +0000 (10:28 +0100)
committerTomas Vanek <vanekt@fbl.cz>
Tue, 14 Jan 2020 11:40:45 +0000 (11:40 +0000)
commitd2308da6e9adc21acd8428afec770670e57bea25
tree7d4f43193024e13c31c10546b584b8c0b268ea35tree | snapshot
parent944d3e6771bd34e6495276a154929c2c0baf5e0acommit | diff
stlink: fix handling of DPv1 and DPv2 banked registers

Arm DPv1 and DPv2 support banked registers by setting the bank in
field DPBANKSEL of register DP_SELECT.
Old ST-Link firmware don't support banked registers and setting a
bank other than bank zero on DPv1 or DPv2 cause issues in the
firmware because it cannot set back bank zero to read CTRL/STAT.
New ST-Link firmware mask away DPBANKSEL bits while writing in
DP_SELECT but support banked register using the same packed method
used by OpenOCD:
#define BANK_REG(bank, reg) (((bank) << 4) | (reg))

Add a new macro STLINK_F_HAS_DPBANKSEL for firmware that support
arm DPv1 and DPv2, plus trigger an error if banked registers are
requested on old firmware.
Prevent changing DPBANKSEL on old firmware.
Log a debug message when changing DPBANKSEL will be ignored.

Change-Id: Iaa592517831d63f8da2290db54f6b32504e3081b
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4978
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
src/jtag/drivers/stlink_usb.c diff | blob | history
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