* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "bitbang.h"
-#include "interface.h"
-#include "commands.h"
+#include <jtag/interface.h>
+#include <jtag/commands.h>
/**
* Function bitbang_stableclocks
*/
static void bitbang_stableclocks(int num_cycles);
-
struct bitbang_interface *bitbang_interface;
/* DANGER!!!! clock absolutely *MUST* be 0 in idle or reset won't work!
*/
#define CLOCK_IDLE() 0
-
/* The bitbang driver leaves the TCK 0 when in idle */
static void bitbang_end_state(tap_state_t state)
{
if (tap_is_state_stable(state))
tap_set_end_state(state);
- else
- {
+ else {
LOG_ERROR("BUG: %i is not a valid end state", state);
exit(-1);
}
uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
- for (i = skip; i < tms_count; i++)
- {
+ for (i = skip; i < tms_count; i++) {
tms = (tms_scan >> i) & 1;
bitbang_interface->write(0, tms, 0);
bitbang_interface->write(1, tms, 0);
tap_set_state(tap_get_end_state());
}
+/**
+ * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
+ * (or SWD) state machine.
+ */
+static int bitbang_execute_tms(struct jtag_command *cmd)
+{
+ unsigned num_bits = cmd->cmd.tms->num_bits;
+ const uint8_t *bits = cmd->cmd.tms->bits;
+
+ DEBUG_JTAG_IO("TMS: %d bits", num_bits);
+
+ int tms = 0;
+ for (unsigned i = 0; i < num_bits; i++) {
+ tms = ((bits[i/8] >> (i % 8)) & 1);
+ bitbang_interface->write(0, tms, 0);
+ bitbang_interface->write(1, tms, 0);
+ }
+ bitbang_interface->write(CLOCK_IDLE(), tms, 0);
+
+ return ERROR_OK;
+}
+
static void bitbang_path_move(struct pathmove_command *cmd)
{
int num_states = cmd->num_states;
int tms = 0;
state_count = 0;
- while (num_states)
- {
+ while (num_states) {
if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
- {
tms = 0;
- }
else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
- {
tms = 1;
- }
- else
- {
- LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
+ else {
+ LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
+ tap_state_name(tap_get_state()),
+ tap_state_name(cmd->path[state_count]));
exit(-1);
}
tap_state_t saved_end_state = tap_get_end_state();
/* only do a state_move when we're not already in IDLE */
- if (tap_get_state() != TAP_IDLE)
- {
+ if (tap_get_state() != TAP_IDLE) {
bitbang_end_state(TAP_IDLE);
bitbang_state_move(0);
}
/* execute num_cycles */
- for (i = 0; i < num_cycles; i++)
- {
+ for (i = 0; i < num_cycles; i++) {
bitbang_interface->write(0, 0, 0);
bitbang_interface->write(1, 0, 0);
}
bitbang_state_move(0);
}
-
static void bitbang_stableclocks(int num_cycles)
{
int tms = (tap_get_state() == TAP_RESET ? 1 : 0);
int i;
/* send num_cycles clocks onto the cable */
- for (i = 0; i < num_cycles; i++)
- {
+ for (i = 0; i < num_cycles; i++) {
bitbang_interface->write(1, tms, 0);
bitbang_interface->write(0, tms, 0);
}
}
-
-
static void bitbang_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
{
tap_state_t saved_end_state = tap_get_end_state();
int bit_cnt;
- if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) || (ir_scan && (tap_get_state() == TAP_IRSHIFT))))
- {
+ if (!((!ir_scan &&
+ (tap_get_state() == TAP_DRSHIFT)) ||
+ (ir_scan && (tap_get_state() == TAP_IRSHIFT)))) {
if (ir_scan)
bitbang_end_state(TAP_IRSHIFT);
else
bitbang_end_state(saved_end_state);
}
- for (bit_cnt = 0; bit_cnt < scan_size; bit_cnt++)
- {
+ for (bit_cnt = 0; bit_cnt < scan_size; bit_cnt++) {
int val = 0;
int tms = (bit_cnt == scan_size-1) ? 1 : 0;
int tdi;
bitbang_interface->write(1, tms, tdi);
- if (type != SCAN_OUT)
- {
+ if (type != SCAN_OUT) {
if (val)
buffer[bytec] |= bcval;
else
}
}
- if (tap_get_state() != tap_get_end_state())
- {
+ if (tap_get_state() != tap_get_end_state()) {
/* we *KNOW* the above loop transitioned out of
* the shift state, so we skip the first state
* and move directly to the end state.
int bitbang_execute_queue(void)
{
- struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
+ struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
int scan_size;
enum scan_type type;
uint8_t *buffer;
int retval;
- if (!bitbang_interface)
- {
+ if (!bitbang_interface) {
LOG_ERROR("BUG: Bitbang interface called, but not yet initialized");
exit(-1);
}
if (bitbang_interface->blink)
bitbang_interface->blink(1);
- while (cmd)
- {
- switch (cmd->type)
- {
+ while (cmd) {
+ switch (cmd->type) {
case JTAG_RESET:
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+ LOG_DEBUG("reset trst: %i srst %i",
+ cmd->cmd.reset->trst,
+ cmd->cmd.reset->srst);
#endif
- if ((cmd->cmd.reset->trst == 1) || (cmd->cmd.reset->srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
- {
+ if ((cmd->cmd.reset->trst == 1) ||
+ (cmd->cmd.reset->srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
tap_set_state(TAP_RESET);
- }
bitbang_interface->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
break;
case JTAG_RUNTEST:
#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));
+ LOG_DEBUG("runtest %i cycles, end in %s",
+ cmd->cmd.runtest->num_cycles,
+ tap_state_name(cmd->cmd.runtest->end_state));
#endif
bitbang_end_state(cmd->cmd.runtest->end_state);
bitbang_runtest(cmd->cmd.runtest->num_cycles);
bitbang_stableclocks(cmd->cmd.stableclocks->num_cycles);
break;
- case JTAG_STATEMOVE:
+ case JTAG_TLR_RESET:
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("statemove end in %s", tap_state_name(cmd->cmd.statemove->end_state));
+ LOG_DEBUG("statemove end in %s",
+ tap_state_name(cmd->cmd.statemove->end_state));
#endif
bitbang_end_state(cmd->cmd.statemove->end_state);
bitbang_state_move(0);
break;
case JTAG_PATHMOVE:
#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
- tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
+ LOG_DEBUG("pathmove: %i states, end in %s",
+ cmd->cmd.pathmove->num_states,
+ tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
#endif
bitbang_path_move(cmd->cmd.pathmove);
break;
case JTAG_SCAN:
#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));
+ LOG_DEBUG("%s scan end in %s",
+ (cmd->cmd.scan->ir_scan) ? "IR" : "DR",
+ tap_state_name(cmd->cmd.scan->end_state));
#endif
bitbang_end_state(cmd->cmd.scan->end_state);
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
#endif
jtag_sleep(cmd->cmd.sleep->us);
break;
+ case JTAG_TMS:
+ retval = bitbang_execute_tms(cmd);
+ break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
projects / fw / openocd / blobdiff