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bus_blaster: do not fail on missing get_latency_timer 

Patch submitted from Trac #64
Seems certain clones do not correctly emulate the ftdi chip, if
the call to read the latency timer fails then do not treat this as a
failure.

Change-Id: Iae671b926d101adf1010639d11ca46c58d0af524
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/1627
Tested-by: jenkins
Reviewed-by: Xiaofan <xiaofanc@gmail.com>
This commit is contained in:
Søren Jørvang 2013-09-17 14:21:38 +01:00 committed by Spencer Oliver
parent b89917020d
commit 3f34ed9c79
2 changed files with 6 additions and 8 deletions
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7
src/jtag/drivers/usb_blaster/ublast_access_ftd2xx.c
View File

@ -136,12 +136,11 @@ static int ublast_ftd2xx_init(struct ublast_lowlevel *low)
}
status = FT_GetLatencyTimer(*ftdih, &latency_timer);
if (status != FT_OK) {
if (status != FT_OK)
LOG_ERROR("unable to get latency timer: %s",
ftd2xx_status_string(status));
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("current latency timer: %i", latency_timer);
else
LOG_DEBUG("current latency timer: %i", latency_timer);
status = FT_SetBitMode(*ftdih, 0x00, 0);
if (status != FT_OK) {

7
src/jtag/drivers/usb_blaster/ublast_access_ftdi.c
View File

@ -99,11 +99,10 @@ static int ublast_ftdi_init(struct ublast_lowlevel *low)
return ERROR_JTAG_INIT_FAILED;
}
if (ftdi_get_latency_timer(ftdic, &latency_timer) < 0) {
if (ftdi_get_latency_timer(ftdic, &latency_timer) < 0)
LOG_ERROR("unable to get latency timer");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("current latency timer: %u", latency_timer);
else
LOG_DEBUG("current latency timer: %u", latency_timer);
ftdi_disable_bitbang(ftdic);
return ERROR_OK;