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jtag: simplify management of non-implemented handlers 

There is just a single entry point for the jtag API .khz(),
.speed_div(), .power_dropout(), .srst_asserted().

Simplify the code by in-lining the default handler.
The overall code behaviour is not changed.
This change prevents modifying at run-time the content of
struct jtag_interface.

Inspired from change http://openocd.zylin.com/943
by Evan Hunter <ehunter@broadcom.com>

Change-Id: I09aeb76d614db57b1884ac7ee9f00c152cd77849
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4892
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Antonio Borneo 2018-07-11 10:21:04 +02:00 committed by Tomas Vanek
parent 7cddeb0af2
commit e26910fdad
2 changed files with 29 additions and 48 deletions
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39
src/jtag/adapter.c
View File

@ -66,30 +66,6 @@ static int jim_adapter_name(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
return JIM_OK;
}
static int default_khz(int khz, int *jtag_speed)
{
LOG_ERROR("Translation from khz to jtag_speed not implemented");
return ERROR_FAIL;
}
static int default_speed_div(int speed, int *khz)
{
LOG_ERROR("Translation from jtag_speed to khz not implemented");
return ERROR_FAIL;
}
static int default_power_dropout(int *dropout)
{
*dropout = 0; /* by default we can't detect power dropout */
return ERROR_OK;
}
static int default_srst_asserted(int *srst_asserted)
{
*srst_asserted = 0; /* by default we can't detect srst asserted */
return ERROR_OK;
}
COMMAND_HANDLER(interface_transport_command)
{
char **transports;
@ -158,21 +134,8 @@ COMMAND_HANDLER(handle_interface_command)
LOG_WARNING("Adapter driver '%s' did not declare "
"which transports it allows; assuming "
"legacy JTAG-only", jtag_interface->name);
retval = allow_transports(CMD_CTX, jtag_interface->transports
return allow_transports(CMD_CTX, jtag_interface->transports
? jtag_interface->transports : jtag_only);
if (ERROR_OK != retval)
return retval;
if (jtag_interface->khz == NULL)
jtag_interface->khz = default_khz;
if (jtag_interface->speed_div == NULL)
jtag_interface->speed_div = default_speed_div;
if (jtag_interface->power_dropout == NULL)
jtag_interface->power_dropout = default_power_dropout;
if (jtag_interface->srst_asserted == NULL)
jtag_interface->srst_asserted = default_srst_asserted;
return ERROR_OK;
}
/* no valid interface was found (i.e. the configuration option,

38
src/jtag/core.c
View File

@ -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)