#endif
#include "bitbang.h"
-
-/* project specific includes */
-#include "log.h"
-#include "types.h"
#include "jtag.h"
-#include "configuration.h"
-
-/* system includes */
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-
/**
* Function bitbang_stableclocks
*/
#define CLOCK_IDLE() 0
-int bitbang_execute_queue(void);
-
/* The bitbang driver leaves the TCK 0 when in idle */
-
-void bitbang_end_state(tap_state_t state)
+static void bitbang_end_state(tap_state_t state)
{
if (tap_is_state_stable(state))
tap_set_end_state(state);
}
}
-void bitbang_state_move(void)
+static void bitbang_state_move(int skip)
{
int i=0, tms=0;
u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
- for (i = 0; i < 7; i++)
+ for (i = skip; i < 7; i++)
{
tms = (tms_scan >> i) & 1;
bitbang_interface->write(0, tms, 0);
tap_set_state(tap_get_end_state());
}
-void bitbang_path_move(pathmove_command_t *cmd)
+static void bitbang_path_move(pathmove_command_t *cmd)
{
int num_states = cmd->num_states;
int state_count;
tap_set_end_state(tap_get_state());
}
-void bitbang_runtest(int num_cycles)
+static void bitbang_runtest(int num_cycles)
{
int i;
if (tap_get_state() != TAP_IDLE)
{
bitbang_end_state(TAP_IDLE);
- bitbang_state_move();
+ bitbang_state_move(0);
}
/* execute num_cycles */
/* finish in end_state */
bitbang_end_state(saved_end_state);
if (tap_get_state() != tap_get_end_state())
- bitbang_state_move();
+ bitbang_state_move(0);
}
-void bitbang_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
+static void bitbang_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size)
{
tap_state_t saved_end_state = tap_get_end_state();
int bit_cnt;
else
bitbang_end_state(TAP_DRSHIFT);
- bitbang_state_move();
+ bitbang_state_move(0);
bitbang_end_state(saved_end_state);
}
}
}
- /* TAP_DRSHIFT & TAP_IRSHIFT are illegal end states, so we always transition to the pause
- * state which is a legal stable state from which statemove will work.
- *
- * Exit1 -> Pause
- */
- bitbang_interface->write(0, 0, 0);
- bitbang_interface->write(1, 0, 0);
- bitbang_interface->write(CLOCK_IDLE(), 0, 0);
-
- if (ir_scan)
- tap_set_state(TAP_IRPAUSE);
- else
- tap_set_state(TAP_DRPAUSE);
-
if (tap_get_state() != tap_get_end_state())
- bitbang_state_move();
+ {
+ /* we *KNOW* the above loop transitioned out of
+ * the shift state, so we skip the first state
+ * and move directly to the end state.
+ */
+ bitbang_state_move(1);
+ }
}
int bitbang_execute_queue(void)
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("end_state: %s", tap_state_name(cmd->cmd.end_state->end_state) );
#endif
- if (cmd->cmd.end_state->end_state != -1)
+ if (cmd->cmd.end_state->end_state != TAP_INVALID)
bitbang_end_state(cmd->cmd.end_state->end_state);
break;
case JTAG_RESET:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("runtest %i cycles, end in %s", cmd->cmd.runtest->num_cycles, tap_state_name(cmd->cmd.runtest->end_state) );
#endif
- if (cmd->cmd.runtest->end_state != -1)
+ if (cmd->cmd.runtest->end_state != TAP_INVALID)
bitbang_end_state(cmd->cmd.runtest->end_state);
bitbang_runtest(cmd->cmd.runtest->num_cycles);
break;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("statemove end in %s", tap_state_name(cmd->cmd.statemove->end_state));
#endif
- if (cmd->cmd.statemove->end_state != -1)
+ if (cmd->cmd.statemove->end_state != TAP_INVALID)
bitbang_end_state(cmd->cmd.statemove->end_state);
- bitbang_state_move();
+ bitbang_state_move(0);
break;
case JTAG_PATHMOVE:
#ifdef _DEBUG_JTAG_IO_
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("%s scan end in %s", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", tap_state_name(cmd->cmd.scan->end_state) );
#endif
- if (cmd->cmd.scan->end_state != -1)
+ if (cmd->cmd.scan->end_state != TAP_INVALID)
bitbang_end_state(cmd->cmd.scan->end_state);
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);