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>

diff --git a/src/jtag/drivers/usb_blaster/ublast_access_ftd2xx.c b/src/jtag/drivers/usb_blaster/ublast_access_ftd2xx.c
index e350650d3bab2d156a1a602ff5ed416d2501f4dc..14351fbd439e1c38f7176a89e7c75985b4c6c0df 100644 (file)
--- a/src/jtag/drivers/usb_blaster/ublast_access_ftd2xx.c
+++ b/src/jtag/drivers/usb_blaster/ublast_access_ftd2xx.c
@@ -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) {

diff --git a/src/jtag/drivers/usb_blaster/ublast_access_ftdi.c b/src/jtag/drivers/usb_blaster/ublast_access_ftdi.c
index 23893e14dfe6553ec60a6ced3a479bc2fb0770e9..2527fe9a6315f41dd856ac80622b6a9867b635f6 100644 (file)
--- a/src/jtag/drivers/usb_blaster/ublast_access_ftdi.c
+++ b/src/jtag/drivers/usb_blaster/ublast_access_ftdi.c
@@ -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;