jtag: jtag_add_ir_scan() now takes a single field

In the code a single field was all that was ever used. Makes
jtag_add_ir_scan() simpler and leaves more complicated stuff
to jtag_add_plain_ir_scan().

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

15 files changed, 46 insertions, 37 deletions

diff --git a/src/flash/nor/str9xpec.c b/src/flash/nor/str9xpec.c
index 3796a4b1..b6d24f58 100644
--- a/src/flash/nor/str9xpec.c
+++ b/src/flash/nor/str9xpec.c
@@ -48,7 +48,7 @@ int str9xpec_set_instr(struct jtag_tap *tap, uint32_t new_instr, tap_state_t end
 		buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 		field.in_value = NULL;
 
-		jtag_add_ir_scan(tap, 1, &field, end_state);
+		jtag_add_ir_scan(tap, &field, end_state);
 
 		free(field.out_value);
 	}
diff --git a/src/jtag/core.c b/src/jtag/core.c
index 2e09cb6d..bce332fc 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -42,7 +42,8 @@
 /// The number of JTAG queue flushes (for profiling and debugging purposes).
 static int jtag_flush_queue_count;
 
-static void jtag_add_scan_check(struct jtag_tap *active, void (*jtag_add_scan)(struct jtag_tap *active, int in_num_fields, const struct scan_field *in_fields, tap_state_t state),
+static void jtag_add_scan_check(struct jtag_tap *active,
+		void (*jtag_add_scan)(struct jtag_tap *active, int in_num_fields, const struct scan_field *in_fields, tap_state_t state),
 		int in_num_fields, struct scan_field *in_fields, tap_state_t state);
 
 /**
@@ -352,17 +353,22 @@ void jtag_alloc_in_value32(struct scan_field *field)
 	interface_jtag_alloc_in_value32(field);
 }
 
-void jtag_add_ir_scan_noverify(struct jtag_tap *active, int in_count, const struct scan_field *in_fields,
+void jtag_add_ir_scan_noverify(struct jtag_tap *active, const struct scan_field *in_fields,
 		tap_state_t state)
 {
 	jtag_prelude(state);
 
-	int retval = interface_jtag_add_ir_scan(active, in_count, in_fields, state);
+	int retval = interface_jtag_add_ir_scan(active, in_fields, state);
 	jtag_set_error(retval);
 }
 
+static void jtag_add_ir_scan_noverify_callback(struct jtag_tap *active, int dummy, const struct scan_field *in_fields,
+		tap_state_t state)
+{
+	jtag_add_ir_scan_noverify(active, in_fields, state);
+}
 
-void jtag_add_ir_scan(struct jtag_tap *active, int in_num_fields, struct scan_field *in_fields, tap_state_t state)
+void jtag_add_ir_scan(struct jtag_tap *active, struct scan_field *in_fields, tap_state_t state)
 {
 	assert(state != TAP_RESET);
 
@@ -370,18 +376,15 @@ void jtag_add_ir_scan(struct jtag_tap *active, int in_num_fields, struct scan_fi
 	{
 		/* 8 x 32 bit id's is enough for all invocations */
 
-		for (int j = 0; j < in_num_fields; j++)
-		{
-			/* 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 = active->expected;
-			in_fields[j].check_mask = active->expected_mask;
-		}
-		jtag_add_scan_check(active, jtag_add_ir_scan_noverify, in_num_fields, in_fields, state);
+		/* 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->check_value = active->expected;
+		in_fields->check_mask = active->expected_mask;
+		jtag_add_scan_check(active, jtag_add_ir_scan_noverify_callback, 1, in_fields, state);
 	} else
 	{
-		jtag_add_ir_scan_noverify(active, in_num_fields, in_fields, state);
+		jtag_add_ir_scan_noverify(active, in_fields, state);
 	}
 }
 
diff --git a/src/jtag/drivers/driver.c b/src/jtag/drivers/driver.c
index 673d191e..57bc28d1 100644
--- a/src/jtag/drivers/driver.c
+++ b/src/jtag/drivers/driver.c
@@ -74,7 +74,7 @@ static void cmd_queue_scan_field_clone(struct scan_field * dst, const struct sca
  * see jtag_add_ir_scan()
  *
  */
-int interface_jtag_add_ir_scan(struct jtag_tap* active, int in_num_fields, const struct scan_field *in_fields, tap_state_t state)
+int interface_jtag_add_ir_scan(struct jtag_tap* active, const struct scan_field *in_fields, tap_state_t state)
 {
 	size_t num_taps = jtag_tap_count_enabled();
 
@@ -106,8 +106,7 @@ int interface_jtag_add_ir_scan(struct jtag_tap* active, int in_num_fields, const
 			/* if TAP is listed in input fields, copy the value */
 			tap->bypass = 0;
 
-			for (int j = 0; j < in_num_fields; j++)
-				cmd_queue_scan_field_clone(field, in_fields + j);
+			cmd_queue_scan_field_clone(field, in_fields);
 		} else
 		{
 			/* if a TAP isn't listed in input fields, set it to BYPASS */
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index 6e21024e..fe57db10 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -350,13 +350,13 @@ int jtag_init_inner(struct command_context *cmd_ctx);
  * subsequent DR SCANs.
  *
  */
-void jtag_add_ir_scan(struct jtag_tap* tap, int num_fields,
+void jtag_add_ir_scan(struct jtag_tap* tap,
 		struct scan_field* fields, tap_state_t endstate);
 /**
  * The same as jtag_add_ir_scan except no verification is performed out
  * the output values.
  */
-void jtag_add_ir_scan_noverify(struct jtag_tap* tap, int num_fields,
+void jtag_add_ir_scan_noverify(struct jtag_tap* tap,
 		const struct scan_field *fields, tap_state_t state);
 /**
  * Duplicate the scan fields passed into the function into an IR SCAN
diff --git a/src/jtag/minidriver.h b/src/jtag/minidriver.h
index a4172169..4631593f 100644
--- a/src/jtag/minidriver.h
+++ b/src/jtag/minidriver.h
@@ -50,7 +50,7 @@
 #include <jtag/minidriver_imp.h>
 
 int interface_jtag_add_ir_scan(struct jtag_tap* active,
-		int num_fields, const struct scan_field* fields,
+		const struct scan_field* fields,
 		tap_state_t endstate);
 int interface_jtag_add_plain_ir_scan(
 		int num_fields, const struct scan_field* fields,
diff --git a/src/jtag/minidummy/minidummy.c b/src/jtag/minidummy/minidummy.c
index 98b449f9..1eef0879 100644
--- a/src/jtag/minidummy/minidummy.c
+++ b/src/jtag/minidummy/minidummy.c
@@ -46,7 +46,7 @@ int interface_jtag_execute_queue(void)
 	return ERROR_OK;
 }
 
-int interface_jtag_add_ir_scan(struct jtag_tap *active, int num_fields, const struct scan_field *fields, tap_state_t state)
+int interface_jtag_add_ir_scan(struct jtag_tap *active, const struct scan_field *fields, tap_state_t state)
 {
 	/* synchronously do the operation here */
 
diff --git a/src/jtag/tcl.c b/src/jtag/tcl.c
index da01f812..1073abc0 100644
--- a/src/jtag/tcl.c
+++ b/src/jtag/tcl.c
@@ -1490,6 +1490,15 @@ COMMAND_HANDLER(handle_irscan_command)
 	}
 
 	int num_fields = CMD_ARGC / 2;
+	if (num_fields > 1)
+	{
+		/* we really should be looking at plain_ir_scan if we want
+		 * anything more fancy.
+		 */
+		LOG_ERROR("Specify a single value for tap");
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
 	size_t fields_len = sizeof(struct scan_field) * num_fields;
 	fields = malloc(fields_len);
 	memset(fields, 0, fields_len);
@@ -1521,7 +1530,7 @@ COMMAND_HANDLER(handle_irscan_command)
 	}
 
 	/* did we have an endstate? */
-	jtag_add_ir_scan(tap, num_fields, fields, endstate);
+	jtag_add_ir_scan(tap, fields, endstate);
 
 	retval = jtag_execute_queue();
 
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c
index 0b112589..391d8f20 100644
--- a/src/jtag/zy1000/zy1000.c
+++ b/src/jtag/zy1000/zy1000.c
@@ -574,13 +574,11 @@ static __inline void scanFields(int num_fields, const struct scan_field *fields,
 	}
 }
 
-int interface_jtag_add_ir_scan(struct jtag_tap *active, int num_fields, const struct scan_field *fields, tap_state_t state)
+int interface_jtag_add_ir_scan(struct jtag_tap *active, const struct scan_field *fields, tap_state_t state)
 {
 	int scan_size = 0;
 	struct jtag_tap *tap, *nextTap;
 
-	assert(num_fields == 1);
-
 	for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 	{
 		nextTap = jtag_tap_next_enabled(tap);
@@ -590,7 +588,7 @@ int interface_jtag_add_ir_scan(struct jtag_tap *active, int num_fields, const st
 		/* search the list */
 		if (tap == active)
 		{
-			scanFields(num_fields, fields, TAP_IRSHIFT, pause);
+			scanFields(1, fields, TAP_IRSHIFT, pause);
 			/* update device information */
 			buf_cpy(fields[0].out_value, tap->cur_instr, scan_size);
 
diff --git a/src/pld/virtex2.c b/src/pld/virtex2.c
index 15685e61..976535b4 100644
--- a/src/pld/virtex2.c
+++ b/src/pld/virtex2.c
@@ -40,7 +40,7 @@ static int virtex2_set_instr(struct jtag_tap *tap, uint32_t new_instr)
 		buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 		field.in_value = NULL;
 
-		jtag_add_ir_scan(tap, 1, &field, jtag_set_end_state(TAP_IDLE));
+		jtag_add_ir_scan(tap, &field, jtag_set_end_state(TAP_IDLE));
 
 		free(field.out_value);
 	}
diff --git a/src/target/arm11_dbgtap.c b/src/target/arm11_dbgtap.c
index f0490596..2b7b4e42 100644
--- a/src/target/arm11_dbgtap.c
+++ b/src/target/arm11_dbgtap.c
@@ -49,13 +49,13 @@ static const tap_state_t arm11_move_pi_to_si_via_ci[] =
 
 
 /* REVISIT no error handling here! */
-static void arm11_add_ir_scan_vc(struct jtag_tap *tap, int num_fields, struct scan_field *fields,
+static void arm11_add_ir_scan_vc(struct jtag_tap *tap, struct scan_field *fields,
 		tap_state_t state)
 {
 	if (cmd_queue_cur_state == TAP_IRPAUSE)
 		jtag_add_pathmove(ARRAY_SIZE(arm11_move_pi_to_si_via_ci), arm11_move_pi_to_si_via_ci);
 
-	jtag_add_ir_scan(tap, num_fields, fields, state);
+	jtag_add_ir_scan(tap, fields, state);
 }
 
 static const tap_state_t arm11_move_pd_to_sd_via_cd[] =
@@ -149,7 +149,7 @@ void arm11_add_IR(struct arm11_common * arm11, uint8_t instr, tap_state_t state)
 
 	arm11_setup_field(arm11, 5, &instr, NULL, &field);
 
-	arm11_add_ir_scan_vc(arm11->arm.target->tap, 1, &field, state == ARM11_TAP_DEFAULT ? TAP_IRPAUSE : state);
+	arm11_add_ir_scan_vc(arm11->arm.target->tap, &field, state == ARM11_TAP_DEFAULT ? TAP_IRPAUSE : state);
 }
 
 /** Verify data shifted out from Scan Chain Register (SCREG). */
diff --git a/src/target/arm_jtag.c b/src/target/arm_jtag.c
index 3e27b763..5ed104cf 100644
--- a/src/target/arm_jtag.c
+++ b/src/target/arm_jtag.c
@@ -45,13 +45,13 @@ int arm_jtag_set_instr_inner(struct arm_jtag *jtag_info, uint32_t new_instr,  vo
 
 	if (no_verify_capture == NULL)
 	{
-		jtag_add_ir_scan(tap, 1, &field, jtag_get_end_state());
+		jtag_add_ir_scan(tap, &field, jtag_get_end_state());
 	} else
 	{
 		/* FIX!!!! this is a kludge!!! arm926ejs.c should reimplement this arm_jtag_set_instr to
 		 * have special verification code.
 		 */
-		jtag_add_ir_scan_noverify(tap, 1, &field, jtag_get_end_state());
+		jtag_add_ir_scan_noverify(tap, &field, jtag_get_end_state());
 	}
 
 	return ERROR_OK;
diff --git a/src/target/etb.c b/src/target/etb.c
index 1f73ff5e..2c4e3ebe 100644
--- a/src/target/etb.c
+++ b/src/target/etb.c
@@ -60,7 +60,7 @@ static int etb_set_instr(struct etb *etb, uint32_t new_instr)
 
 		field.in_value = NULL;
 
-		jtag_add_ir_scan(tap, 1, &field, jtag_get_end_state());
+		jtag_add_ir_scan(tap, &field, jtag_get_end_state());
 
 		free(field.out_value);
 	}
diff --git a/src/target/mips_ejtag.c b/src/target/mips_ejtag.c
index 79160fc4..e0550a81 100644
--- a/src/target/mips_ejtag.c
+++ b/src/target/mips_ejtag.c
@@ -46,7 +46,7 @@ int mips_ejtag_set_instr(struct mips_ejtag *ejtag_info, int new_instr, void *del
 		buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 		field.in_value = NULL;
 
-		jtag_add_ir_scan(tap, 1, &field, jtag_get_end_state());
+		jtag_add_ir_scan(tap, &field, jtag_get_end_state());
 	}
 
 	return ERROR_OK;
diff --git a/src/target/xscale.c b/src/target/xscale.c
index 49738981..602034eb 100644
--- a/src/target/xscale.c
+++ b/src/target/xscale.c
@@ -173,7 +173,7 @@ static int xscale_jtag_set_instr(struct jtag_tap *tap, uint32_t new_instr)
 		field.out_value = scratch;
 		buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 
-		jtag_add_ir_scan(tap, 1, &field, jtag_get_end_state());
+		jtag_add_ir_scan(tap, &field, jtag_get_end_state());
 	}
 
 	return ERROR_OK;
diff --git a/src/xsvf/xsvf.c b/src/xsvf/xsvf.c
index faa55421..14bed8ef 100644
--- a/src/xsvf/xsvf.c
+++ b/src/xsvf/xsvf.c
@@ -704,7 +704,7 @@ COMMAND_HANDLER(handle_xsvf_command)
 					if (tap == NULL)
 						jtag_add_plain_ir_scan(1, &field, my_end_state);
 					else
-						jtag_add_ir_scan(tap, 1, &field, my_end_state);
+						jtag_add_ir_scan(tap, &field, my_end_state);
 
 					if (xruntest)
 					{