* The number of TAPs in the __jtag_all_taps list, used to track the
* assigned chain position to new TAPs
*/
-static int jtag_num_taps = 0;
+static unsigned jtag_num_taps = 0;
enum reset_types jtag_reset_config = RESET_NONE;
tap_state_t cmd_queue_end_state = TAP_RESET;
int jtag_speed = 0;
/* jtag commands */
+static int handle_interface_list_command(struct command_context_s *cmd_ctx,
+ char *cmd, char **args, int argc);
static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_jtag_khz_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
return __jtag_all_taps;
};
-int jtag_tap_count(void)
+unsigned jtag_tap_count(void)
{
return jtag_num_taps;
}
unsigned jtag_tap_count_enabled(void)
{
- jtag_tap_t *t;
- unsigned n;
-
- n = 0;
- t = jtag_all_taps();
- while(t){
- if( t->enabled ){
+ jtag_tap_t *t = jtag_all_taps();
+ unsigned n = 0;
+ while(t)
+ {
+ if (t->enabled)
n++;
- }
t = t->next_tap;
}
return n;
}
/// Append a new TAP to the chain of all taps.
-static void jtag_tap_add(struct jtag_tap_s *t)
+void jtag_tap_add(struct jtag_tap_s *t)
{
t->abs_chain_position = jtag_num_taps++;
*tap = t;
}
-jtag_tap_t *jtag_tap_by_string( const char *s )
+jtag_tap_t *jtag_tap_by_string(const char *s)
{
- jtag_tap_t *t;
+ /* try by name first */
+ jtag_tap_t *t = jtag_all_taps();
+ while (t)
+ {
+ if (0 == strcmp(t->dotted_name, s))
+ return t;
+ t = t->next_tap;
+ }
+
+ /* no tap found by name, so try to parse the name as a number */
char *cp;
+ unsigned n = strtoul(s, &cp, 0);
+ if ((s == cp) || (*cp != 0))
+ return NULL;
- t = jtag_all_taps();
- /* try name first */
- while(t){
- if( 0 == strcmp( t->dotted_name, s ) ){
- break;
- } else {
- t = t->next_tap;
- }
- }
- /* backup plan is by number */
- if( t == NULL ){
- /* ok - is "s" a number? */
- int n;
- n = strtol( s, &cp, 0 );
- if( (s != cp) && (*cp == 0) ){
- /* Then it is... */
- t = jtag_tap_by_abs_position(n);
- }
- }
- return t;
+ return jtag_tap_by_position(n);
}
-jtag_tap_t * jtag_tap_by_jim_obj( Jim_Interp *interp, Jim_Obj *o )
+jtag_tap_t *jtag_tap_by_jim_obj(Jim_Interp *interp, Jim_Obj *o)
{
- jtag_tap_t *t;
- const char *cp;
-
- cp = Jim_GetString( o, NULL );
- if(cp == NULL){
+ const char *cp = Jim_GetString(o, NULL);
+ jtag_tap_t *t = cp ? jtag_tap_by_string(cp) : NULL;
+ if (NULL == cp)
cp = "(unknown)";
- t = NULL;
- } else {
- t = jtag_tap_by_string( cp );
- }
- if( t == NULL ){
- Jim_SetResult_sprintf(interp,"Tap: %s is unknown", cp );
- }
+ if (NULL == t)
+ Jim_SetResult_sprintf(interp, "Tap '%s' could not be found", cp);
return t;
}
/* returns a pointer to the n-th device in the scan chain */
-jtag_tap_t * jtag_tap_by_abs_position( int n )
+jtag_tap_t *jtag_tap_by_position(unsigned n)
{
- int orig_n;
- jtag_tap_t *t;
+ jtag_tap_t *t = jtag_all_taps();
- orig_n = n;
- t = jtag_all_taps();
-
- while( t && (n > 0)) {
- n--;
+ while (t && n-- > 0)
t = t->next_tap;
- }
+
return t;
}
}
-/**
- * Generate an IR SCAN with a list of scan fields with one entry for each enabled TAP.
- *
- * If the input field list contains an instruction value for a TAP then that is used
- * otherwise the TAP is set to bypass.
- *
- * TAPs for which no fields are passed are marked as bypassed for subsequent DR SCANs.
- *
- */
void jtag_add_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state)
{
if (jtag_verify&&jtag_verify_capture_ir)
}
}
-/**
- * Duplicate the scan fields passed into the function into an IR SCAN command
- *
- * This function assumes that the caller handles extra fields for bypassed TAPs
- *
- */
void jtag_add_plain_ir_scan(int in_num_fields, const scan_field_t *in_fields,
tap_state_t state)
{
}
-/**
- * Generate a DR SCAN using the fields passed to the function.
- * For connected TAPs, the function checks in_fields and uses fields
- * specified there. For bypassed TAPs, the function generates a dummy
- * 1-bit field. The bypass status of TAPs is set by jtag_add_ir_scan().
- */
void jtag_add_dr_scan(int in_num_fields, const scan_field_t *in_fields,
tap_state_t state)
{
jtag_set_error(retval);
}
-/**
- * Duplicate the scan fields passed into the function into a DR SCAN
- * command. Unlike jtag_add_dr_scan(), this function assumes that the
- * caller handles extra fields for bypassed TAPs.
- */
void jtag_add_plain_dr_scan(int in_num_fields, const scan_field_t *in_fields,
tap_state_t state)
{
if (!tap_is_state_stable(path[num_states - 1]))
{
LOG_ERROR("BUG: TAP path doesn't finish in a stable state");
- exit(-1);
+ jtag_set_error(ERROR_JTAG_NOT_STABLE_STATE);
+ return;
}
for (int i = 0; i < num_states; i++)
if (path[i] == TAP_RESET)
{
LOG_ERROR("BUG: TAP_RESET is not a valid state for pathmove sequences");
- exit(-1);
+ jtag_set_error(ERROR_JTAG_STATE_INVALID);
+ return;
}
if ( tap_state_transition(cur_state, true) != path[i]
{
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
tap_state_name(cur_state), tap_state_name(path[i]));
- exit(-1);
+ jtag_set_error(ERROR_JTAG_TRANSITION_INVALID);
+ return;
}
cur_state = path[i];
}
register_command(cmd_ctx, NULL, "interface", handle_interface_command,
COMMAND_CONFIG, "try to configure interface");
+ register_command(cmd_ctx, NULL,
+ "interface_list", &handle_interface_list_command,
+ COMMAND_ANY, "list all built-in interfaces");
register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command,
COMMAND_ANY, "(DEPRECATED) set jtag speed (if supported)");
register_command(cmd_ctx, NULL, "jtag_khz", handle_jtag_khz_command,
return ERROR_OK;
}
-static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_interface_command(struct command_context_s *cmd_ctx,
+ char *cmd, char **args, int argc)
{
- int i;
- int retval;
-
/* check whether the interface is already configured */
if (jtag_interface)
{
}
/* interface name is a mandatory argument */
- if (argc < 1 || args[0][0] == '\0')
- {
+ if (argc != 1 || args[0][0] == '\0')
return ERROR_COMMAND_SYNTAX_ERROR;
- }
- for (i=0; jtag_interfaces[i]; i++)
+ for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
{
- if (strcmp(args[0], jtag_interfaces[i]->name) == 0)
- {
- if ((retval = jtag_interfaces[i]->register_commands(cmd_ctx)) != ERROR_OK)
- {
+ if (strcmp(args[0], jtag_interfaces[i]->name) != 0)
+ continue;
+
+ int retval = jtag_interfaces[i]->register_commands(cmd_ctx);
+ if (ERROR_OK != retval)
return retval;
- }
- jtag_interface = jtag_interfaces[i];
+ jtag_interface = jtag_interfaces[i];
- 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;
- }
+ 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;
- }
+ return ERROR_OK;
}
/* no valid interface was found (i.e. the configuration option,
* didn't match one of the compiled-in interfaces
*/
- LOG_ERROR("No valid jtag interface found (%s)", args[0]);
- LOG_ERROR("compiled-in jtag interfaces:");
- for (i = 0; jtag_interfaces[i]; i++)
+ LOG_ERROR("The specified JTAG interface was not found (%s)", args[0]);
+ handle_interface_list_command(cmd_ctx, cmd, args, argc);
+ return ERROR_JTAG_INVALID_INTERFACE;
+}
+
+static int handle_interface_list_command(struct command_context_s *cmd_ctx,
+ char *cmd, char **args, int argc)
+{
+ if (strcmp(cmd, "interface_list") == 0 && argc > 0)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ command_print(cmd_ctx, "The following JTAG interfaces are available:");
+ for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
{
- LOG_ERROR("%i: %s", i, jtag_interfaces[i]->name);
+ const char *name = jtag_interfaces[i]->name;
+ command_print(cmd_ctx, "%u: %s", i + 1, name);
}
- return ERROR_JTAG_INVALID_INTERFACE;
+ return ERROR_OK;
}
static int handle_jtag_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
}
/**
- * Function jtag_add_statemove
- * moves from the current state to the goal \a state. This needs
+ * Moves from the current state to the goal \a state. This needs
* to be handled according to the xsvf spec, see the XSTATE command
* description.
+ *
+ * From the XSVF spec, pertaining to XSTATE:
+ *
+ * For special states known as stable states (Test-Logic-Reset,
+ * Run-Test/Idle, Pause-DR, Pause- IR), an XSVF interpreter follows
+ * predefined TAP state paths when the starting state is a stable state
+ * and when the XSTATE specifies a new stable state. See the STATE
+ * command in the [Ref 5] for the TAP state paths between stable
+ * states.
+ *
+ * For non-stable states, XSTATE should specify a state that is only one
+ * TAP state transition distance from the current TAP state to avoid
+ * undefined TAP state paths. A sequence of multiple XSTATE commands can
+ * be issued to transition the TAP through a specific state path.
+ *
+ * @note Unless @a tms_bits holds a path that agrees with [Ref 5] in *
+ * above spec, then this code is not fully conformant to the xsvf spec.
+ * This puts a burden on tap_get_tms_path() function from the xsvf spec.
+ * If in doubt, you should confirm that that burden is being met.
+ *
+ * Otherwise, state must be immediately reachable in one clock cycle,
+ * and does not need to be a stable state.
*/
int jtag_add_statemove(tap_state_t goal_state)
{
- int retval = ERROR_OK;
-
- tap_state_t moves[8];
tap_state_t cur_state = cmd_queue_cur_state;
- int i;
- int tms_bits;
- int tms_count;
LOG_DEBUG( "cur_state=%s goal_state=%s",
tap_state_name(cur_state),
tap_state_name(goal_state) );
- /* From the XSVF spec, pertaining to XSTATE:
-
- For special states known as stable states (Test-Logic-Reset,
- Run-Test/Idle, Pause-DR, Pause- IR), an XSVF interpreter follows
- predefined TAP state paths when the starting state is a stable state and
- when the XSTATE specifies a new stable state (see the STATE command in
- the [Ref 5] for the TAP state paths between stable states). For
- non-stable states, XSTATE should specify a state that is only one TAP
- state transition distance from the current TAP state to avoid undefined
- TAP state paths. A sequence of multiple XSTATE commands can be issued to
- transition the TAP through a specific state path.
- */
-
if (goal_state==cur_state )
; /* nothing to do */
-
else if( goal_state==TAP_RESET )
{
jtag_add_tlr();
}
-
else if( tap_is_state_stable(cur_state) && tap_is_state_stable(goal_state) )
{
- /* note: unless tms_bits holds a path that agrees with [Ref 5] in above
- spec, then this code is not fully conformant to the xsvf spec. This
- puts a burden on tap_get_tms_path() function from the xsvf spec.
- If in doubt, you should confirm that that burden is being met.
- */
-
- tms_bits = tap_get_tms_path(cur_state, goal_state);
- tms_count = tap_get_tms_path_len(cur_state, goal_state);
+ unsigned tms_bits = tap_get_tms_path(cur_state, goal_state);
+ unsigned tms_count = tap_get_tms_path_len(cur_state, goal_state);
+ tap_state_t moves[8];
+ assert(tms_count < DIM(moves));
- assert( (unsigned) tms_count < DIM(moves) );
-
- for (i=0; i<tms_count; i++, tms_bits>>=1)
+ for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1)
{
bool bit = tms_bits & 1;
jtag_add_pathmove(tms_count, moves);
}
-
- /* else state must be immediately reachable in one clock cycle, and does not
- need to be a stable state.
- */
else if( tap_state_transition(cur_state, true) == goal_state
|| tap_state_transition(cur_state, false) == goal_state )
{
- /* move a single state */
- moves[0] = goal_state;
- jtag_add_pathmove( 1, moves );
+ jtag_add_pathmove(1, &goal_state);
}
else
- {
- retval = ERROR_FAIL;
- }
+ return ERROR_FAIL;
- return retval;
+ return ERROR_OK;
}
void jtag_set_nsrst_delay(unsigned delay)
Code Review / openocd.git / blobdiff