/***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
+ * Copyright (C) 2009 Zachary T Welch *
+ * zw@superlucidity.net *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007,2008,2009 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2009 SoftPLC Corporation *
* http://softplc.com *
* dick@softplc.com *
* *
- * Copyright (C) 2009 Zachary T Welch *
- * zw@superlucidity.net *
+ * Copyright (C) 2005 by Dominic Rath *
+ * Dominic.Rath@gmx.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
static const char *jtag_event_strings[] =
{
[JTAG_TRST_ASSERTED] = "TAP reset",
+ [JTAG_TAP_EVENT_SETUP] = "TAP setup",
[JTAG_TAP_EVENT_ENABLE] = "TAP enabled",
- [JTAG_TAP_EVENT_POST_RESET] = "TAP post reset",
[JTAG_TAP_EVENT_DISABLE] = "TAP disabled",
};
/* NOTE: order here matches TRST path in jtag_add_reset() */
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
- jtag_notify_reset();
+ jtag_notify_event(JTAG_TRST_ASSERTED);
}
void jtag_add_pathmove(int num_states, const tap_state_t *path)
* sequence must match jtag_add_tlr().
*/
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
- jtag_notify_reset();
+ jtag_notify_event(JTAG_TRST_ASSERTED);
}
}
}
* Validate the date loaded by entry to the Capture-IR state, to help
* find errors related to scan chain configuration (wrong IR lengths)
* or communication.
+ *
+ * Entry state can be anything. On non-error exit, all TAPs are in
+ * bypass mode. On error exits, the scan chain is reset.
*/
static int jtag_validate_ircapture(void)
{
int total_ir_length = 0;
uint8_t *ir_test = NULL;
scan_field_t field;
+ int val;
int chain_pos = 0;
+ int retval;
- tap = NULL;
- total_ir_length = 0;
- for (;;) {
- tap = jtag_tap_next_enabled(tap);
- if (tap == NULL) {
- break;
- }
- total_ir_length += tap->ir_length;
- }
+ for (tap = NULL, total_ir_length = 0;
+ (tap = jtag_tap_next_enabled(tap)) != NULL;
+ total_ir_length += tap->ir_length)
+ continue;
+ /* increase length to add 2 bit sentinel after scan */
total_ir_length += 2;
ir_test = malloc(CEIL(total_ir_length, 8));
if (ir_test == NULL)
return ERROR_FAIL;
+ /* after this scan, all TAPs will capture BYPASS instructions */
buf_set_ones(ir_test, total_ir_length);
field.tap = NULL;
field.out_value = ir_test;
field.in_value = ir_test;
+ jtag_add_plain_ir_scan(1, &field, TAP_IDLE);
- jtag_add_plain_ir_scan(1, &field, TAP_IRPAUSE);
- jtag_add_tlr();
-
- int retval;
+ LOG_DEBUG("IR capture validation scan");
retval = jtag_execute_queue();
if (retval != ERROR_OK)
- return retval;
+ goto done;
tap = NULL;
chain_pos = 0;
- int val;
+
for (;;) {
tap = jtag_tap_next_enabled(tap);
if (tap == NULL) {
* REVISIT we might be able to verify some MSBs too, using
* ircapture/irmask attributes.
*/
- val = buf_get_u32(ir_test, chain_pos, 2);
- if (val != 1) {
- char *cbuf = buf_to_str(ir_test, total_ir_length, 16);
-
- LOG_ERROR("%s: IR capture error; saw 0x%s not 0x..1",
- jtag_tap_name(tap), cbuf);
-
- /* Fail only if we have IDCODE for this device.
- * REVISIT -- why not fail-always?
- */
- if (tap->hasidcode) {
- free(cbuf);
- free(ir_test);
- return ERROR_JTAG_INIT_FAILED;
- }
+ val = buf_get_u32(ir_test, chain_pos, tap->ir_length);
+ if ((val & 0x3) != 1) {
+ LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x..1",
+ jtag_tap_name(tap),
+ (tap->ir_length + 7) / tap->ir_length,
+ val);
+
+ retval = ERROR_JTAG_INIT_FAILED;
+ goto done;
}
+ LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap),
+ (tap->ir_length + 7) / tap->ir_length, val);
chain_pos += tap->ir_length;
}
LOG_ERROR("IR capture error at bit %d, saw 0x%s not 0x...3",
chain_pos, cbuf);
free(cbuf);
- free(ir_test);
- return ERROR_JTAG_INIT_FAILED;
+ retval = ERROR_JTAG_INIT_FAILED;
}
+done:
free(ir_test);
-
- return ERROR_OK;
+ if (retval != ERROR_OK) {
+ jtag_add_tlr();
+ jtag_execute_queue();
+ }
+ return retval;
}
return ERROR_OK;
}
-static int jtag_init_inner(struct command_context_s *cmd_ctx)
+int jtag_init_inner(struct command_context_s *cmd_ctx)
{
jtag_tap_t *tap;
int retval;
+ bool issue_setup = true;
LOG_DEBUG("Init JTAG chain");
if (jtag_examine_chain() != ERROR_OK)
{
LOG_ERROR("Trying to use configured scan chain anyway...");
+ issue_setup = false;
}
if (jtag_validate_ircapture() != ERROR_OK)
{
LOG_WARNING("Errors during IR capture, continuing anyway...");
+ issue_setup = false;
}
+ if (issue_setup)
+ jtag_notify_event(JTAG_TAP_EVENT_SETUP);
+ else
+ LOG_WARNING("Bypassing JTAG setup events due to errors");
+
+
return ERROR_OK;
}
int retval;
if ((retval = jtag_interface_init(cmd_ctx)) != ERROR_OK)
return retval;
- if (jtag_init_inner(cmd_ctx) == ERROR_OK)
- {
- return ERROR_OK;
- }
- return jtag_init_reset(cmd_ctx);
+
+ if (Jim_Eval_Named(interp, "jtag_init", __FILE__, __LINE__) != JIM_OK)
+ return ERROR_FAIL;
+
+ return ERROR_OK;
}
unsigned jtag_get_speed_khz(void)