The out only version of jtag_add_dr_scan smells like a bogus optimization
that complicates the minidriver API for questionable gain.
The function was only used by four old ARM targets. Rewrite the callers
to use the generic function and remove all implementations.
Change-Id: I13b643687ee8ed6bc9b6336e7096c34f40ea96af
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1801
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
This patch fixes the link to the Zylin ZY1000 JTAG Probe webpage.
The ZY1000 product line was acquired by Ultimate Solutions, Inc. in May 2011.
Change-Id: If68cd45a0c47aa20b2e4bb62939b2c505c8c8c2e
Signed-off-by: Bill Traynor <wmat@alphatroop.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Reviewed-on: http://openocd.zylin.com/571
Tested-by: jenkins
Reviewed-by: Peter Stuge <peter@stuge.se>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
disable asynchronous callbacks and reads as minidriver requires
reads and callbacks to be synchronous.
Could possibly be fixed by some design work.
Change-Id: I7ca79a551085b2e8ba6928e1762d1baed6e95d4b
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Reviewed-on: http://openocd.zylin.com/260
Tested-by: jenkins
Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>
Tested-by: Øyvind Harboe <oyvindharboe@gmail.com>
only flush write queue just before waiting for more data,
rather than when fetching more data from the buffer.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Found by inspection: the correct thing in the context is to use
usleep() rather than jtag_sleep(). Relates to JTAG over TCP/IP
only.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
If the JTAG speed has not been set, then it has no defined
value, add code to propagate the error.
No change to actual behavior as no new failure paths have
been introduced. This is a no-op patch to make subsequent patches
smaller.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
used /dev/mem and mmem() to memory map JTAG registers
into user space and used new configure options to exclude
eCos specific code.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
waiting for ZY1000 fifo to idle is now queued as
an asynchronous command. This radically improves
performance when waitIdle() is interspersed with
writes as no readback is required over TCP/IP.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
copy & paste error + added FIFO throttling to work around
lockup bug in FPGA.
The arm11 optimisation was introduced post v0.4.0, so this
is not a regression compared to previous release.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
make wait for srst deassert more long latency friendly
(JTAG over TCP/IP), print actual time if it was more than
1ms.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
first cut peek/poke over tcp/ip, used for debug/research
purposes only. Long term JTAG over TCP/IP might be an
offshoot. The performance is usable for development/testing
purposes.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
For testing and checking the build this can be useful,
it doesn't have any practical application outside development.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
The implementation is now more straightforward as the
scan_fields have been greatly simplified over time.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
By a bit of code inspection it seems like all of these
instances of jtag_get_end_state() can be unambigously
replaced by constants.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
How many bits to shift out before/after enabled tap not
in bypass is calculated outside the loop. This is more of
a demonstration of principle and to clarify code than
a performance optimisation as such. Follows up a bit
on the simplification work in jtag interface.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
In the code a single field was all that was ever used. Makes
jtag_add_ir_scan() simpler and leaves more complicated stuff
to jtag_add_plain_ir_scan().
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
jtag_add_dr/ir_scan() now takes the tap as the first
argument, rather than for each of the fields passed
in.
The code never exercised the path where there was
more than one tap being scanned, who knows if it even
worked.
This simplifies the implementation and reduces clutter
in the calling code.
use jtag_add_ir/dr_plain_scan() for more fancy situations.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
For support of SWD we need to be able to clock out special bit
sequences over TMS or SWDIO. Create this as a generic operation,
not yet called by anything, which is split as usual into:
- upper level abstraction ... here, jtag_add_tms_seq();
- midlayer implementation logic hooking that to the lowlevel code;
- lowlevel minidriver operation ... here, interface_add_tms_seq();
- message type for request queue, here JTAG_TMS.
This is done slightly differently than other operations: there's a flag
saying whether the interface driver supports this request. (In fact a
flag *word* so upper layers can learn about other capabilities too ...
for example, supporting SWD operations.)
That approach (flag) lets this method *eventually* be used to eliminate
pathmove() and statemove() support from most adapter drivers, by moving
all that logic into the mid-layer and increasing uniformity between the
various drivers. (Which will in turn reduce subtle bugginess.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Andreas Fritiofson
Spencer Oliver
Bill Traynor
Øyvind Harboe
Jonas Hörberg
David Brownell