* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2009 SoftPLC Corporation *
static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state),
int in_num_fields, scan_field_t *in_fields, tap_state_t state);
-/* note that this is not marked as static as it must be available from outside core.c for those
- that implement the jtag_xxx() minidriver layer
-*/
-int jtag_error=ERROR_OK;
+/**
+ * The jtag_error variable is set when an error occurs while executing
+ * the queue. Application code may set this using jtag_set_error(),
+ * when an error occurs during processing that should be reported during
+ * jtag_execute_queue().
+ *
+ * Tts value may be checked with jtag_get_error() and cleared with
+ * jtag_error_clear(). This value is returned (and cleared) by
+ * jtag_execute_queue().
+ */
+static int jtag_error = ERROR_OK;
-char* jtag_event_strings[] =
+static const char *jtag_event_strings[] =
{
- "JTAG controller reset (RESET or TRST)"
-};
-
-const Jim_Nvp nvp_jtag_tap_event[] = {
- { .value = JTAG_TAP_EVENT_ENABLE, .name = "tap-enable" },
- { .value = JTAG_TAP_EVENT_DISABLE, .name = "tap-disable" },
-
- { .name = NULL, .value = -1 }
+ [JTAG_TRST_ASSERTED] = "JTAG controller reset (TLR or TRST)",
+ [JTAG_TAP_EVENT_ENABLE] = "TAP enabled",
+ [JTAG_TAP_EVENT_DISABLE] = "TAP disabled",
};
+/*
+ * JTAG adapters must initialize with TRST and SRST de-asserted
+ * (they're negative logic, so that means *high*)
+ */
static int jtag_trst = 0;
static int jtag_srst = 0;
*/
static unsigned jtag_num_taps = 0;
-enum reset_types jtag_reset_config = RESET_NONE;
-tap_state_t cmd_queue_end_state = TAP_RESET;
+static enum reset_types jtag_reset_config = RESET_NONE;
+static tap_state_t cmd_queue_end_state = TAP_RESET;
tap_state_t cmd_queue_cur_state = TAP_RESET;
-int jtag_verify_capture_ir = 1;
-int jtag_verify = 1;
+static bool jtag_verify_capture_ir = true;
+static int jtag_verify = 1;
/* how long the OpenOCD should wait before attempting JTAG communication after reset lines deasserted (in ms) */
static int jtag_nsrst_delay = 0; /* default to no nSRST delay */
static int jtag_ntrst_delay = 0; /* default to no nTRST delay */
+typedef struct jtag_event_callback_s
+{
+ jtag_event_handler_t callback;
+ void* priv;
+ struct jtag_event_callback_s* next;
+} jtag_event_callback_t;
+
/* callbacks to inform high-level handlers about JTAG state changes */
-jtag_event_callback_t *jtag_event_callbacks;
+static jtag_event_callback_t *jtag_event_callbacks;
/* speed in kHz*/
static int speed_khz = 0;
-/* flag if the kHz speed was defined */
-bool hasKHz = false;
+/* speed to fallback to when RCLK is requested but not supported */
+static int rclk_fallback_speed_khz = 0;
+static enum {CLOCK_MODE_SPEED, CLOCK_MODE_KHZ, CLOCK_MODE_RCLK} clock_mode;
+static int jtag_speed = 0;
-struct jtag_interface_s *jtag = NULL;
+static struct jtag_interface_s *jtag = NULL;
/* configuration */
jtag_interface_t *jtag_interface = NULL;
-int jtag_speed = 0;
+
+void jtag_set_error(int error)
+{
+ if ((error == ERROR_OK) || (jtag_error != ERROR_OK))
+ return;
+ jtag_error = error;
+}
+int jtag_get_error(void)
+{
+ return jtag_error;
+}
+int jtag_error_clear(void)
+{
+ int temp = jtag_error;
+ jtag_error = ERROR_OK;
+ return temp;
+}
+
jtag_tap_t *jtag_all_taps(void)
{
{
jtag_tap_t *t = jtag_all_taps();
unsigned n = 0;
- while(t)
+ while (t)
{
if (t->enabled)
n++;
t->abs_chain_position = jtag_num_taps++;
jtag_tap_t **tap = &__jtag_all_taps;
- while(*tap != NULL)
+ while (*tap != NULL)
tap = &(*tap)->next_tap;
*tap = t;
}
+/* returns a pointer to the n-th device in the scan chain */
+static inline jtag_tap_t *jtag_tap_by_position(unsigned n)
+{
+ jtag_tap_t *t = jtag_all_taps();
+
+ while (t && n-- > 0)
+ t = t->next_tap;
+
+ return t;
+}
+
jtag_tap_t *jtag_tap_by_string(const char *s)
{
/* try by name first */
jtag_tap_t *t = jtag_all_taps();
+
while (t)
{
if (0 == strcmp(t->dotted_name, s))
}
/* 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))
+ unsigned n;
+ if (parse_uint(s, &n) != ERROR_OK)
return NULL;
- return jtag_tap_by_position(n);
+ /* FIXME remove this numeric fallback code late June 2010, along
+ * with all info in the User's Guide that TAPs have numeric IDs.
+ * Also update "scan_chain" output to not display the numbers.
+ */
+ t = jtag_tap_by_position(n);
+ if (t)
+ LOG_WARNING("Specify TAP '%s' by name, not number %u",
+ t->dotted_name, n);
+
+ return t;
}
jtag_tap_t *jtag_tap_by_jim_obj(Jim_Interp *interp, Jim_Obj *o)
return t;
}
-/* returns a pointer to the n-th device in the scan chain */
-jtag_tap_t *jtag_tap_by_position(unsigned n)
+jtag_tap_t* jtag_tap_next_enabled(jtag_tap_t* p)
{
- jtag_tap_t *t = jtag_all_taps();
-
- while (t && n-- > 0)
- t = t->next_tap;
-
- return t;
+ p = p ? p->next_tap : jtag_all_taps();
+ while (p)
+ {
+ if (p->enabled)
+ return p;
+ p = p->next_tap;
+ }
+ return NULL;
}
const char *jtag_tap_name(const jtag_tap_t *tap)
}
-int jtag_register_event_callback(int (*callback)(enum jtag_event event, void *priv), void *priv)
+int jtag_register_event_callback(jtag_event_handler_t callback, void *priv)
{
jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
return ERROR_OK;
}
-int jtag_unregister_event_callback(int (*callback)(enum jtag_event event, void *priv))
+int jtag_unregister_event_callback(jtag_event_handler_t callback, void *priv)
{
- jtag_event_callback_t **callbacks_p = &jtag_event_callbacks;
+ jtag_event_callback_t **callbacks_p;
+ jtag_event_callback_t **next;
if (callback == NULL)
{
return ERROR_INVALID_ARGUMENTS;
}
- while (*callbacks_p)
+ for (callbacks_p = &jtag_event_callbacks;
+ *callbacks_p != NULL;
+ callbacks_p = next)
{
- jtag_event_callback_t **next = &((*callbacks_p)->next);
+ next = &((*callbacks_p)->next);
+
+ if ((*callbacks_p)->priv != priv)
+ continue;
+
if ((*callbacks_p)->callback == callback)
{
free(*callbacks_p);
*callbacks_p = *next;
}
- callbacks_p = next;
}
return ERROR_OK;
while (callback)
{
+ jtag_event_callback_t *next;
+
+ /* callback may remove itself */
+ next = callback->next;
callback->callback(event, callback->priv);
- callback = callback->next;
+ callback = next;
}
return ERROR_OK;
{
jtag_checks();
- assert(state!=TAP_INVALID);
+ assert(state != TAP_INVALID);
cmd_queue_cur_state = state;
}
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)
+ if (jtag_verify && jtag_verify_capture_ir)
{
/* 8 x 32 bit id's is enough for all invocations */
/* if we are to run a verification of the ir scan, we need to get the input back.
* We may have to allocate space if the caller didn't ask for the input back.
*/
- in_fields[j].check_value=in_fields[j].tap->expected;
- in_fields[j].check_mask=in_fields[j].tap->expected_mask;
+ in_fields[j].check_value = in_fields[j].tap->expected;
+ in_fields[j].check_mask = in_fields[j].tap->expected_mask;
}
jtag_add_scan_check(jtag_add_ir_scan_noverify, in_num_fields, in_fields, state);
} else
jtag_set_error(retval);
}
-void jtag_add_callback(jtag_callback1_t f, u8 *in)
+void jtag_add_callback(jtag_callback1_t f, jtag_callback_data_t data0)
{
- interface_jtag_add_callback(f, in);
+ interface_jtag_add_callback(f, data0);
}
-void jtag_add_callback4(jtag_callback_t f, u8 *in,
+void jtag_add_callback4(jtag_callback_t f, jtag_callback_data_t data0,
jtag_callback_data_t data1, jtag_callback_data_t data2,
jtag_callback_data_t data3)
{
- interface_jtag_add_callback4(f, in, data1, data2, data3);
+ interface_jtag_add_callback4(f, data0, data1, data2, data3);
}
-int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *in_check_mask, int num_bits);
+int jtag_check_value_inner(uint8_t *captured, uint8_t *in_check_value, uint8_t *in_check_mask, int num_bits);
-static int jtag_check_value_mask_callback(u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
+static int jtag_check_value_mask_callback(jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3)
{
- return jtag_check_value_inner(in, (u8 *)data1, (u8 *)data2, (int)data3);
+ return jtag_check_value_inner((uint8_t *)data0, (uint8_t *)data1, (uint8_t *)data2, (int)data3);
}
static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state),
if ((in_fields[i].check_value != NULL) && (in_fields[i].in_value != NULL))
{
/* this is synchronous for a minidriver */
- jtag_add_callback4(jtag_check_value_mask_callback, in_fields[i].in_value,
+ jtag_add_callback4(jtag_check_value_mask_callback, (jtag_callback_data_t)in_fields[i].in_value,
(jtag_callback_data_t)in_fields[i].check_value,
(jtag_callback_data_t)in_fields[i].check_mask,
(jtag_callback_data_t)in_fields[i].num_bits);
}
void jtag_add_dr_out(jtag_tap_t* tap,
- int num_fields, const int* num_bits, const u32* value,
+ int num_fields, const int* num_bits, const uint32_t* value,
tap_state_t end_state)
{
assert(end_state != TAP_INVALID);
return;
}
- if ( tap_state_transition(cur_state, true) != path[i]
+ if (tap_state_transition(cur_state, true) != path[i]
&& tap_state_transition(cur_state, false) != path[i])
{
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
cmd_queue_cur_state = path[num_states - 1];
}
+int jtag_add_statemove(tap_state_t goal_state)
+{
+ tap_state_t cur_state = cmd_queue_cur_state;
+
+ LOG_DEBUG("cur_state=%s goal_state=%s",
+ tap_state_name(cur_state),
+ tap_state_name(goal_state));
+
+
+ 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))
+ {
+ 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));
+
+ for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1)
+ {
+ bool bit = tms_bits & 1;
+
+ cur_state = tap_state_transition(cur_state, bit);
+ moves[i] = cur_state;
+ }
+
+ jtag_add_pathmove(tms_count, moves);
+ }
+ else if (tap_state_transition(cur_state, true) == goal_state
+ || tap_state_transition(cur_state, false) == goal_state)
+ {
+ jtag_add_pathmove(1, &goal_state);
+ }
+
+ else
+ return ERROR_FAIL;
+
+ return ERROR_OK;
+}
+
void jtag_add_runtest(int num_cycles, tap_state_t state)
{
jtag_prelude(state);
void jtag_add_reset(int req_tlr_or_trst, int req_srst)
{
int trst_with_tlr = 0;
+ int new_srst = 0;
+ int new_trst = 0;
- /* FIX!!! there are *many* different cases here. A better
- * approach is needed for legal combinations of transitions...
+ /* Without SRST, we must use target-specific JTAG operations
+ * on each target; callers should not be requesting SRST when
+ * that signal doesn't exist.
+ *
+ * RESET_SRST_PULLS_TRST is a board or chip level quirk, which
+ * can kick in even if the JTAG adapter can't drive TRST.
*/
- if ((jtag_reset_config & RESET_HAS_SRST)&&
- (jtag_reset_config & RESET_HAS_TRST)&&
- ((jtag_reset_config & RESET_SRST_PULLS_TRST)==0))
- {
- if (((req_tlr_or_trst&&!jtag_trst)||
- (!req_tlr_or_trst&&jtag_trst))&&
- ((req_srst&&!jtag_srst)||
- (!req_srst&&jtag_srst)))
- {
- /* FIX!!! srst_pulls_trst allows 1,1 => 0,0 transition.... */
- //LOG_ERROR("BUG: transition of req_tlr_or_trst and req_srst in the same jtag_add_reset() call is undefined");
+ if (req_srst) {
+ if (!(jtag_reset_config & RESET_HAS_SRST)) {
+ LOG_ERROR("BUG: can't assert SRST");
+ jtag_set_error(ERROR_FAIL);
+ return;
+ }
+ if ((jtag_reset_config & RESET_SRST_PULLS_TRST) != 0
+ && !req_tlr_or_trst) {
+ LOG_ERROR("BUG: can't assert only SRST");
+ jtag_set_error(ERROR_FAIL);
+ return;
}
+ new_srst = 1;
}
- /* Make sure that jtag_reset_config allows the requested reset */
- /* if SRST pulls TRST, we can't fulfill srst == 1 with trst == 0 */
- if (((jtag_reset_config & RESET_SRST_PULLS_TRST) && (req_srst == 1)) && (!req_tlr_or_trst))
- {
- LOG_ERROR("BUG: requested reset would assert trst");
- jtag_set_error(ERROR_FAIL);
- return;
+ /* JTAG reset (entry to TAP_RESET state) can always be achieved
+ * using TCK and TMS; that may go through a TAP_{IR,DR}UPDATE
+ * state first. TRST accelerates it, and bypasses those states.
+ *
+ * RESET_TRST_PULLS_SRST is a board or chip level quirk, which
+ * can kick in even if the JTAG adapter can't drive SRST.
+ */
+ if (req_tlr_or_trst) {
+ if (!(jtag_reset_config & RESET_HAS_TRST))
+ trst_with_tlr = 1;
+ else if ((jtag_reset_config & RESET_TRST_PULLS_SRST) != 0
+ && !req_srst)
+ trst_with_tlr = 1;
+ else
+ new_trst = 1;
}
- /* if TRST pulls SRST, we reset with TAP T-L-R */
- if (((jtag_reset_config & RESET_TRST_PULLS_SRST) && (req_tlr_or_trst)) && (req_srst == 0))
- {
- trst_with_tlr = 1;
- }
+ /* Maybe change TRST and/or SRST signal state */
+ if (jtag_srst != new_srst || jtag_trst != new_trst) {
+ int retval;
- if (req_srst && !(jtag_reset_config & RESET_HAS_SRST))
- {
- LOG_ERROR("BUG: requested SRST assertion, but the current configuration doesn't support this");
- jtag_set_error(ERROR_FAIL);
- return;
- }
+ retval = interface_jtag_add_reset(new_trst, new_srst);
+ if (retval != ERROR_OK)
+ jtag_set_error(retval);
+ else
+ retval = jtag_execute_queue();
- if (req_tlr_or_trst)
- {
- if (!trst_with_tlr && (jtag_reset_config & RESET_HAS_TRST))
- {
- jtag_trst = 1;
- } else
- {
- trst_with_tlr = 1;
+ if (retval != ERROR_OK) {
+ LOG_ERROR("TRST/SRST error %d", retval);
+ return;
}
- } else
- {
- jtag_trst = 0;
- }
-
- jtag_srst = req_srst;
-
- int retval = interface_jtag_add_reset(jtag_trst, jtag_srst);
- if (retval != ERROR_OK)
- {
- jtag_set_error(retval);
- return;
}
- jtag_execute_queue();
- if (jtag_srst)
- {
- LOG_DEBUG("SRST line asserted");
- }
- else
- {
- LOG_DEBUG("SRST line released");
- if (jtag_nsrst_delay)
- jtag_add_sleep(jtag_nsrst_delay * 1000);
+ /* SRST resets everything hooked up to that signal */
+ if (jtag_srst != new_srst) {
+ jtag_srst = new_srst;
+ if (jtag_srst)
+ LOG_DEBUG("SRST line asserted");
+ else {
+ LOG_DEBUG("SRST line released");
+ if (jtag_nsrst_delay)
+ jtag_add_sleep(jtag_nsrst_delay * 1000);
+ }
}
- if (trst_with_tlr)
- {
- LOG_DEBUG("JTAG reset with RESET instead of TRST");
+ /* Maybe enter the JTAG TAP_RESET state ...
+ * - using only TMS, TCK, and the JTAG state machine
+ * - or else more directly, using TRST
+ *
+ * TAP_RESET should be invisible to non-debug parts of the system.
+ */
+ if (trst_with_tlr) {
+ LOG_DEBUG("JTAG reset with TLR instead of TRST");
jtag_set_end_state(TAP_RESET);
jtag_add_tlr();
- return;
- }
- if (jtag_trst)
- {
- /* we just asserted nTRST, so we're now in Test-Logic-Reset,
- * and inform possible listeners about this
- */
- LOG_DEBUG("TRST line asserted");
- tap_set_state(TAP_RESET);
- jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
- }
- else
- {
- if (jtag_ntrst_delay)
- jtag_add_sleep(jtag_ntrst_delay * 1000);
+ } else if (jtag_trst != new_trst) {
+ jtag_trst = new_trst;
+ if (jtag_trst) {
+ /* we just asserted nTRST, so we're now in TAP_RESET;
+ * inform possible listeners about this
+ *
+ * REVISIT asserting TRST is less significant than
+ * being in TAP_RESET ... both entries (TRST, TLR)
+ * should trigger a callback.
+ */
+ LOG_DEBUG("TRST line asserted");
+ tap_set_state(TAP_RESET);
+ jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
+ } else {
+ LOG_DEBUG("TRST line released");
+ if (jtag_ntrst_delay)
+ jtag_add_sleep(jtag_ntrst_delay * 1000);
+ }
}
}
LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
}
- if (state!=TAP_INVALID)
+ if (state != TAP_INVALID)
cmd_queue_end_state = state;
return cmd_queue_end_state;
}
return cmd_queue_end_state;
}
-void jtag_add_sleep(u32 us)
+void jtag_add_sleep(uint32_t us)
{
/// @todo Here, keep_alive() appears to be a layering violation!!!
keep_alive();
jtag_set_error(interface_jtag_add_sleep(us));
}
-int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *in_check_mask, int num_bits)
+int jtag_check_value_inner(uint8_t *captured, uint8_t *in_check_value, uint8_t *in_check_mask, int num_bits)
{
int retval = ERROR_OK;
else
compare_failed = buf_cmp(captured, in_check_value, num_bits);
- if (compare_failed){
+ if (compare_failed) {
/* An error handler could have caught the failing check
* only report a problem when there wasn't a handler, or if the handler
* acknowledged the error
return retval;
}
-void jtag_check_value_mask(scan_field_t *field, u8 *value, u8 *mask)
+void jtag_check_value_mask(scan_field_t *field, uint8_t *value, uint8_t *mask)
{
assert(field->in_value != NULL);
- if (value==NULL)
+ if (value == NULL)
{
/* no checking to do */
return;
jtag_execute_queue_noclear();
- int retval=jtag_check_value_inner(field->in_value, value, mask, field->num_bits);
+ int retval = jtag_check_value_inner(field->in_value, value, mask, field->num_bits);
jtag_set_error(retval);
}
if (event == JTAG_TRST_ASSERTED)
{
+ tap->enabled = !tap->disabled_after_reset;
+
+ /* current instruction is either BYPASS or IDCODE */
buf_set_ones(tap->cur_instr, tap->ir_length);
tap->bypass = 1;
}
return ERROR_OK;
}
-void jtag_sleep(u32 us)
+void jtag_sleep(uint32_t us)
{
alive_sleep(us/1000);
}
#define EXTRACT_PART(X) (((X) & 0xffff000) >> 12)
#define EXTRACT_VER(X) (((X) & 0xf0000000) >> 28)
-static int jtag_examine_chain_execute(u8 *idcode_buffer, unsigned num_idcode)
+static int jtag_examine_chain_execute(uint8_t *idcode_buffer, unsigned num_idcode)
{
scan_field_t field = {
.tap = NULL,
return jtag_execute_queue();
}
-static bool jtag_examine_chain_check(u8 *idcodes, unsigned count)
+static bool jtag_examine_chain_check(uint8_t *idcodes, unsigned count)
{
- u8 zero_check = 0x0;
- u8 one_check = 0xff;
+ uint8_t zero_check = 0x0;
+ uint8_t one_check = 0xff;
for (unsigned i = 0; i < count * 4; i++)
{
}
static void jtag_examine_chain_display(enum log_levels level, const char *msg,
- const char *name, u32 idcode)
+ const char *name, uint32_t idcode)
{
log_printf_lf(level, __FILE__, __LINE__, __FUNCTION__,
- "JTAG tap: %s %16.16s: 0x%08x "
- "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
- name, msg, idcode,
- EXTRACT_MFG(idcode), EXTRACT_PART(idcode), EXTRACT_VER(idcode) );
+ "JTAG tap: %s %16.16s: 0x%08x "
+ "(mfg: 0x%3.3x, part: 0x%4.4x, ver: 0x%1.1x)",
+ name, msg,
+ (unsigned int)idcode,
+ (unsigned int)EXTRACT_MFG(idcode),
+ (unsigned int)EXTRACT_PART(idcode),
+ (unsigned int)EXTRACT_VER(idcode));
}
-static bool jtag_idcode_is_final(u32 idcode)
+static bool jtag_idcode_is_final(uint32_t idcode)
{
return idcode == 0x000000FF || idcode == 0xFFFFFFFF;
}
* read back correctly. This can help identify and diagnose problems
* with the JTAG chain earlier, gives more helpful/explicit error messages.
*/
-static void jtag_examine_chain_end(u8 *idcodes, unsigned count, unsigned max)
+static void jtag_examine_chain_end(uint8_t *idcodes, unsigned count, unsigned max)
{
bool triggered = false;
- for ( ; count < max - 31; count += 32)
+ for (; count < max - 31; count += 32)
{
- u32 idcode = buf_get_u32(idcodes, count, 32);
+ uint32_t idcode = buf_get_u32(idcodes, count, 32);
// do not trigger the warning if the data looks good
if (!triggered && jtag_idcode_is_final(idcode))
continue;
LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
- count, idcode);
+ count, (unsigned int)idcode);
triggered = true;
}
}
}
/* Loop over the expected identification codes and test for a match */
- u8 ii;
+ uint8_t ii;
for (ii = 0; ii < tap->expected_ids_cnt; ii++)
{
if (tap->idcode == tap->expected_ids[ii])
/* If none of the expected ids matched, log an error */
if (ii != tap->expected_ids_cnt)
{
- LOG_INFO("JTAG Tap/device matched");
+ LOG_DEBUG("JTAG Tap/device matched");
return true;
}
jtag_examine_chain_display(LOG_LVL_ERROR, "got",
*/
int jtag_examine_chain(void)
{
- u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
+ uint8_t idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
unsigned device_count = 0;
jtag_examine_chain_execute(idcode_buffer, JTAG_MAX_CHAIN_SIZE);
for (unsigned bit_count = 0; bit_count < (JTAG_MAX_CHAIN_SIZE * 32) - 31;)
{
- u32 idcode = buf_get_u32(idcode_buffer, bit_count, 32);
+ uint32_t idcode = buf_get_u32(idcode_buffer, bit_count, 32);
+ tap->hasidcode = true;
if ((idcode & 1) == 0)
{
/* LSB must not be 0, this indicates a device in bypass */
LOG_WARNING("Tap/Device does not have IDCODE");
idcode = 0;
+ tap->hasidcode = false;
bit_count += 1;
}
{
jtag_tap_t *tap;
int total_ir_length = 0;
- u8 *ir_test = NULL;
+ uint8_t *ir_test = NULL;
scan_field_t field;
int chain_pos = 0;
tap = NULL;
total_ir_length = 0;
- for(;;){
+ for (;;) {
tap = jtag_tap_next_enabled(tap);
- if( tap == NULL ){
+ if (tap == NULL) {
break;
}
total_ir_length += tap->ir_length;
tap = NULL;
chain_pos = 0;
int val;
- for(;;){
+ for (;;) {
tap = jtag_tap_next_enabled(tap);
- if( tap == NULL ){
+ if (tap == NULL) {
break;
}
val = buf_get_u32(ir_test, chain_pos, 2);
- if (val != 0x1)
+ /* Only fail this check if we have IDCODE for this device */
+ if ((val != 0x1)&&(tap->hasidcode))
{
char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
LOG_ERROR("Could not validate JTAG scan chain, IR mismatch, scan returned 0x%s. tap=%s pos=%d expected 0x1 got %0x", cbuf, jtag_tap_name(tap), chain_pos, val);
tap->expected_mask = malloc(tap->ir_length);
tap->cur_instr = malloc(tap->ir_length);
+ /// @todo cope sanely with ir_length bigger than 32 bits
buf_set_u32(tap->expected, 0, tap->ir_length, tap->ir_capture_value);
buf_set_u32(tap->expected_mask, 0, tap->ir_length, tap->ir_capture_mask);
buf_set_ones(tap->cur_instr, tap->ir_length);
LOG_DEBUG("Created Tap: %s @ abs position %d, "
"irlen %d, capture: 0x%x mask: 0x%x", tap->dotted_name,
tap->abs_chain_position, tap->ir_length,
- tap->ir_capture_value, tap->ir_capture_mask);
+ (unsigned int)(tap->ir_capture_value), (unsigned int)(tap->ir_capture_mask));
jtag_tap_add(tap);
}
void jtag_tap_free(jtag_tap_t *tap)
{
- /// @todo is anything missing? no memory leaks please
+ jtag_unregister_event_callback(&jtag_reset_callback, tap);
+
+ /// @todo is anything missing? no memory leaks please
free((void *)tap->expected_ids);
free((void *)tap->chip);
free((void *)tap->tapname);
LOG_ERROR("JTAG interface has to be specified, see \"interface\" command");
return ERROR_JTAG_INVALID_INTERFACE;
}
- if(hasKHz)
- {
- jtag_interface->khz(jtag_get_speed_khz(), &jtag_speed);
- hasKHz = false;
- }
+ jtag = jtag_interface;
if (jtag_interface->init() != ERROR_OK)
+ {
+ jtag = NULL;
return ERROR_JTAG_INIT_FAILED;
+ }
+
+ int requested_khz = jtag_get_speed_khz();
+ int actual_khz = requested_khz;
+ int retval = jtag_get_speed_readable(&actual_khz);
+ if (ERROR_OK != retval)
+ LOG_INFO("interface specific clock speed value %d", jtag_get_speed());
+ else if (actual_khz)
+ {
+ if ((CLOCK_MODE_RCLK == clock_mode)
+ || ((CLOCK_MODE_KHZ == clock_mode) && !requested_khz))
+ {
+ LOG_INFO("RCLK (adaptive clock speed) not supported - fallback to %d kHz"
+ , actual_khz);
+ }
+ else
+ LOG_INFO("clock speed %d kHz", actual_khz);
+ }
+ else
+ LOG_INFO("RCLK (adaptive clock speed)");
- jtag = jtag_interface;
return ERROR_OK;
}
LOG_DEBUG("Init JTAG chain");
tap = jtag_tap_next_enabled(NULL);
- if( tap == NULL ){
+ if (tap == NULL) {
LOG_ERROR("There are no enabled taps?");
return ERROR_JTAG_INIT_FAILED;
}
jtag_add_tlr();
- if ((retval=jtag_execute_queue())!=ERROR_OK)
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
/* examine chain first, as this could discover the real chain layout */
{
int retval;
- if ((retval=jtag_interface_init(cmd_ctx)) != ERROR_OK)
+ if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
return retval;
- LOG_DEBUG("Trying to bring the JTAG controller to life by asserting TRST / RESET");
+ LOG_DEBUG("Trying to bring the JTAG controller to life by asserting TRST / TLR");
/* Reset can happen after a power cycle.
*
- * Ideally we would only assert TRST or run RESET before the target reset.
+ * Ideally we would only assert TRST or run TLR before the target reset.
*
* However w/srst_pulls_trst, trst is asserted together with the target
* reset whether we want it or not.
* NB! order matters!!!! srst *can* disconnect JTAG circuitry
*
*/
- jtag_add_reset(1, 0); /* RESET or TRST */
+ jtag_add_reset(1, 0); /* TAP_RESET, using TMS+TCK or TRST */
if (jtag_reset_config & RESET_HAS_SRST)
{
jtag_add_reset(1, 1);
- if ((jtag_reset_config & RESET_SRST_PULLS_TRST)==0)
+ if ((jtag_reset_config & RESET_SRST_PULLS_TRST) == 0)
jtag_add_reset(0, 1);
}
jtag_add_reset(0, 0);
int jtag_init(struct command_context_s *cmd_ctx)
{
int retval;
- if ((retval=jtag_interface_init(cmd_ctx)) != ERROR_OK)
+ if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
return retval;
- if (jtag_init_inner(cmd_ctx)==ERROR_OK)
+ if (jtag_init_inner(cmd_ctx) == ERROR_OK)
{
return ERROR_OK;
}
return jtag_init_reset(cmd_ctx);
}
-void jtag_set_speed_khz(unsigned khz)
-{
- speed_khz = khz;
-}
unsigned jtag_get_speed_khz(void)
{
return speed_khz;
}
-void jtag_set_verify(bool enable)
+static int jtag_khz_to_speed(unsigned khz, int* speed)
{
- jtag_verify = enable;
+ 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;
+ }
+ return ERROR_OK;
}
-bool jtag_will_verify()
+static int jtag_rclk_to_speed(unsigned fallback_speed_khz, int* speed)
{
- return jtag_verify;
+ int retval = jtag_khz_to_speed(0, speed);
+ if ((ERROR_OK != retval) && fallback_speed_khz)
+ {
+ LOG_DEBUG("trying fallback speed...");
+ retval = jtag_khz_to_speed(fallback_speed_khz, speed);
+ }
+ return retval;
}
-
-int jtag_power_dropout(int *dropout)
+static int jtag_set_speed(int speed)
{
- return jtag->power_dropout(dropout);
+ jtag_speed = speed;
+ /* this command can be called during CONFIG,
+ * in which case jtag isn't initialized */
+ return jtag ? jtag->speed(speed) : ERROR_OK;
}
-int jtag_srst_asserted(int *srst_asserted)
+int jtag_config_speed(int speed)
{
- return jtag->srst_asserted(srst_asserted);
+ LOG_DEBUG("handle jtag speed");
+ clock_mode = CLOCK_MODE_SPEED;
+ return jtag_set_speed(speed);
}
-void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e)
+int jtag_config_khz(unsigned khz)
{
- jtag_tap_event_action_t * jteap;
- int done;
-
- jteap = tap->event_action;
-
- done = 0;
- while (jteap) {
- if (jteap->event == e) {
- done = 1;
- LOG_DEBUG( "JTAG tap: %s event: %d (%s) action: %s\n",
- tap->dotted_name,
- e,
- Jim_Nvp_value2name_simple(nvp_jtag_tap_event, e)->name,
- Jim_GetString(jteap->body, NULL) );
- if (Jim_EvalObj(interp, jteap->body) != JIM_OK) {
- Jim_PrintErrorMessage(interp);
- }
- }
+ LOG_DEBUG("handle jtag khz");
+ clock_mode = CLOCK_MODE_KHZ;
+ int speed = 0;
+ int retval = jtag_khz_to_speed(khz, &speed);
+ return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
+}
- jteap = jteap->next;
- }
+int jtag_config_rclk(unsigned fallback_speed_khz)
+{
+ LOG_DEBUG("handle jtag rclk");
+ clock_mode = CLOCK_MODE_RCLK;
+ rclk_fallback_speed_khz = fallback_speed_khz;
+ int speed = 0;
+ int retval = jtag_rclk_to_speed(fallback_speed_khz, &speed);
+ return (ERROR_OK != retval) ? retval : jtag_set_speed(speed);
+}
- if (!done) {
- LOG_DEBUG( "event %d %s - no action",
- e,
- Jim_Nvp_value2name_simple( nvp_jtag_tap_event, e)->name);
+int jtag_get_speed(void)
+{
+ int speed;
+ switch(clock_mode)
+ {
+ case CLOCK_MODE_SPEED:
+ speed = jtag_speed;
+ break;
+ case CLOCK_MODE_KHZ:
+ jtag_khz_to_speed(jtag_get_speed_khz(), &speed);
+ break;
+ case CLOCK_MODE_RCLK:
+ jtag_rclk_to_speed(rclk_fallback_speed_khz, &speed);
+ break;
+ default:
+ LOG_ERROR("BUG: unknown jtag clock mode");
+ speed = 0;
+ break;
}
+ return speed;
}
-int jtag_add_statemove(tap_state_t goal_state)
+int jtag_get_speed_readable(int *khz)
{
- tap_state_t cur_state = cmd_queue_cur_state;
-
- LOG_DEBUG( "cur_state=%s goal_state=%s",
- tap_state_name(cur_state),
- tap_state_name(goal_state) );
+ return jtag ? jtag->speed_div(jtag_get_speed(), khz) : ERROR_OK;
+}
+void jtag_set_verify(bool enable)
+{
+ jtag_verify = enable;
+}
- 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) )
- {
- 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));
+bool jtag_will_verify()
+{
+ return jtag_verify;
+}
- for (unsigned i = 0; i < tms_count; i++, tms_bits >>= 1)
- {
- bool bit = tms_bits & 1;
+void jtag_set_verify_capture_ir(bool enable)
+{
+ jtag_verify_capture_ir = enable;
+}
- cur_state = tap_state_transition(cur_state, bit);
- moves[i] = cur_state;
- }
+bool jtag_will_verify_capture_ir()
+{
+ return jtag_verify_capture_ir;
+}
- jtag_add_pathmove(tms_count, moves);
- }
- else if( tap_state_transition(cur_state, true) == goal_state
- || tap_state_transition(cur_state, false) == goal_state )
- {
- jtag_add_pathmove(1, &goal_state);
- }
+int jtag_power_dropout(int *dropout)
+{
+ return jtag->power_dropout(dropout);
+}
- else
- return ERROR_FAIL;
+int jtag_srst_asserted(int *srst_asserted)
+{
+ return jtag->srst_asserted(srst_asserted);
+}
- return ERROR_OK;
+enum reset_types jtag_get_reset_config(void)
+{
+ return jtag_reset_config;
+}
+void jtag_set_reset_config(enum reset_types type)
+{
+ jtag_reset_config = type;
}
int jtag_get_trst(void)
projects / fw / openocd / blobdiff