jtag: simplify management of non-implemented handlers

[openocd.git] / src / jtag / core.c

diff --git a/src/jtag/core.c b/src/jtag/core.c
index e57f62db7df1012979e05e51d06b318adaf0096b..84e93967753bd5f94194f7b4fbb0521aff64bb02 100644 (file)
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -1611,14 +1611,18 @@ static int adapter_khz_to_speed(unsigned khz, int *speed)
 {
        LOG_DEBUG("convert khz to interface specific speed value");
        speed_khz = khz;
-       if (jtag != NULL) {
-               LOG_DEBUG("have interface set up");
-               int speed_div1;
-               int retval = jtag->khz(jtag_get_speed_khz(), &speed_div1);
-               if (ERROR_OK != retval)
-                       return retval;
-               *speed = speed_div1;
+       if (!jtag)
+               return ERROR_OK;
+       LOG_DEBUG("have interface set up");
+       if (!jtag->khz) {
+               LOG_ERROR("Translation from khz to jtag_speed not implemented");
+               return ERROR_FAIL;
        }
+       int speed_div1;
+       int retval = jtag->khz(jtag_get_speed_khz(), &speed_div1);
+       if (ERROR_OK != retval)
+               return retval;
+       *speed = speed_div1;
        return ERROR_OK;
 }
 
@@ -1681,7 +1685,13 @@ int jtag_get_speed_readable(int *khz)
        int retval = jtag_get_speed(&jtag_speed_var);
        if (retval != ERROR_OK)
                return retval;
-       return jtag ? jtag->speed_div(jtag_speed_var, khz) : ERROR_OK;
+       if (!jtag)
+               return ERROR_OK;
+       if (!jtag->speed_div) {
+               LOG_ERROR("Translation from jtag_speed to khz not implemented");
+               return ERROR_FAIL;
+       }
+       return jtag->speed_div(jtag_speed_var, khz);
 }
 
 void jtag_set_verify(bool enable)
@@ -1712,12 +1722,20 @@ int jtag_power_dropout(int *dropout)
                LOG_ERROR("No Valid JTAG Interface Configured.");
                exit(-1);
        }
-       return jtag->power_dropout(dropout);
+       if (jtag->power_dropout)
+               return jtag->power_dropout(dropout);
+
+       *dropout = 0; /* by default we can't detect power dropout */
+       return ERROR_OK;
 }
 
 int jtag_srst_asserted(int *srst_asserted)
 {
-       return jtag->srst_asserted(srst_asserted);
+       if (jtag->srst_asserted)
+               return jtag->srst_asserted(srst_asserted);
+
+       *srst_asserted = 0; /* by default we can't detect srst asserted */
+       return ERROR_OK;
 }
 
 enum reset_types jtag_get_reset_config(void)