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| author | Øyvind Harboe <oyvind.harboe@zylin.com> | 2010-01-11 10:21:56 +0100 |
|---|---|---|
| committer | Øyvind Harboe <oyvind.harboe@zylin.com> | 2010-01-11 10:25:13 +0100 |
| commit | c74ca40e09baebe8b86b1a77ad343f7b8ebde5d6 (patch) | |
| tree | 79f61bb6eb23f07e5d302c5c56c249aa8f5cf7a2 | |
| parent | 8c730aaee22a505cf66666be3ff28734ac885418 (diff) | |
| download | openocd_libswd-c74ca40e09baebe8b86b1a77ad343f7b8ebde5d6.tar.gz openocd_libswd-c74ca40e09baebe8b86b1a77ad343f7b8ebde5d6.tar.bz2 openocd_libswd-c74ca40e09baebe8b86b1a77ad343f7b8ebde5d6.tar.xz openocd_libswd-c74ca40e09baebe8b86b1a77ad343f7b8ebde5d6.zip | |
zy1000: reset bugfix
flush JTAG FIFO before reset. Fixes RCLK problems observed
w/lpc2148, but really fixes a wider range of problems.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
| -rw-r--r-- | src/jtag/zy1000/zy1000.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c index e66a8b5a..9070f2e3 100644 --- a/src/jtag/zy1000/zy1000.c +++ b/src/jtag/zy1000/zy1000.c @@ -132,6 +132,13 @@ static int zy1000_power_dropout(int *dropout) void zy1000_reset(int trst, int srst) { LOG_DEBUG("zy1000 trst=%d, srst=%d", trst, srst); + + /* flush the JTAG FIFO. Not flushing the queue before messing with + * reset has such interesting bugs as causing hard to reproduce + * RCLK bugs as RCLK will stop responding when TRST is asserted + */ + waitIdle(); + if (!srst) { ZY1000_POKE(ZY1000_JTAG_BASE + 0x14, 0x00000001); @@ -156,7 +163,6 @@ void zy1000_reset(int trst, int srst) if (trst||(srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST))) { - waitIdle(); /* we're now in the RESET state until trst is deasserted */ ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_RESET); } else |