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zy1000: wait for srst to deassert

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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>
This commit is contained in:
Øyvind Harboe 2010-05-04 07:36:05 +02:00
parent fe60480b7a
commit 32e647acf4
1 changed files with 27 additions and 13 deletions
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40
src/jtag/zy1000/zy1000.c
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@ -49,6 +49,7 @@
#include <jtag/minidriver.h>
#include <jtag/interface.h>
#include <time.h>
#include <helper/time_support.h>
#include <netinet/tcp.h>
@ -176,28 +177,41 @@ void zy1000_reset(int trst, int srst)
}
/* wait for srst to float back up */
if (!srst)
if ((!srst && ((jtag_get_reset_config() & RESET_TRST_PULLS_SRST) == 0))||
(!srst && !trst && (jtag_get_reset_config() & RESET_TRST_PULLS_SRST)))
{
int i;
for (i = 0; i < 1000; i++)
{
bool first = true;
long long start;
long total = 0;
for (;;)
{
// We don't want to sense our own reset, so we clear here.
// There is of course a timing hole where we could loose
// a "real" reset.
if (!readSRST())
{
if (total > 1)
{
LOG_USER("SRST took %dms to deassert", (int)total);
}
break;
}
/* wait 1ms */
alive_sleep(1);
if (first)
{
first = false;
start = timeval_ms();
}
total = timeval_ms() - start;
if (total > 5000)
{
LOG_ERROR("SRST took too long to deassert: %dms", (int)total);
break;
}
}
if (i == 1000)
{
LOG_USER("SRST didn't deassert after %dms", i);
} else if (i > 1)
{
LOG_USER("SRST took %dms to deassert", i);
}
}
}