#include "command.h"
+
#if 0
#define _DEBUG_JTAG_IO_
#endif
/* 16 Tap States, from page 21 of ASSET InterTech, Inc.'s svf.pdf
*/
-enum tap_state
+typedef enum tap_state
{
TAP_RESET = 0x0, TAP_IDLE = 0x8,
TAP_DRSELECT = 0x1, TAP_DRCAPTURE = 0x2, TAP_DRSHIFT = 0x3, TAP_DREXIT1 = 0x4,
TAP_DRPAUSE = 0x5, TAP_DREXIT2 = 0x6, TAP_DRUPDATE = 0x7,
TAP_IRSELECT = 0x9, TAP_IRCAPTURE = 0xa, TAP_IRSHIFT = 0xb, TAP_IREXIT1 = 0xc,
TAP_IRPAUSE = 0xd, TAP_IREXIT2 = 0xe, TAP_IRUPDATE = 0xf
-};
+} tap_state_t;
typedef struct tap_transition_s
{
enum tap_state low;
} tap_transition_t;
-extern char* tap_state_strings[16];
extern int tap_move_map[16]; /* map 16 TAP states to 6 stable states */
extern u8 tap_move[6][6]; /* value scanned to TMS to move from one of six stable states to another */
extern tap_transition_t tap_transitions[16]; /* describe the TAP state diagram */
/* in_check_value/mask, in_handler_error_handler, in_handler_priv can be used by the in handler, otherwise they contain garbage */
u8 *in_check_value; /* used to validate scan results */
u8 *in_check_mask; /* check specified bits against check_value */
- in_handler_t in_handler; /* process received buffer using this handler */
+ in_handler_t in_handler;/* process received buffer using this handler */
void *in_handler_priv; /* additional information for the in_handler */
} scan_field_t;
-
enum scan_type
{
/* IN: from device to host, OUT: from host to device */
enum tap_state end_state; /* TAP state in which JTAG commands should finish */
} runtest_command_t;
+
+typedef struct stableclocks_command_s
+{
+ int num_cycles; /* number of clock cycles that should be sent */
+} stableclocks_command_t;
+
+
typedef struct reset_command_s
{
int trst; /* trst/srst 0: deassert, 1: assert, -1: don't change */
statemove_command_t *statemove;
pathmove_command_t *pathmove;
runtest_command_t *runtest;
+ stableclocks_command_t *stableclocks;
reset_command_t *reset;
end_state_command_t *end_state;
sleep_command_t *sleep;
JTAG_SCAN = 1,
JTAG_STATEMOVE = 2, JTAG_RUNTEST = 3,
JTAG_RESET = 4, JTAG_END_STATE = 5,
- JTAG_PATHMOVE = 6, JTAG_SLEEP = 7
+ JTAG_PATHMOVE = 6, JTAG_SLEEP = 7,
+ JTAG_STABLECLOCKS = 8
};
typedef struct jtag_command_s
extern jtag_command_t *jtag_command_queue;
-// this is really: typedef jtag_tap_t
-// But - the typedef is done in "types.h"
-// due to "forward decloration reasons"
+/* forward declaration */
+typedef struct jtag_tap_event_action_s jtag_tap_event_action_t;
+
+/* this is really: typedef jtag_tap_t */
+/* But - the typedef is done in "types.h" */
+/* due to "forward decloration reasons" */
struct jtag_tap_s
{
const char *chip;
u8 expected_ids_cnt;/* Number of expected identification codes */
u8 *cur_instr; /* current instruction */
int bypass; /* bypass register selected */
+
+ jtag_tap_event_action_t *event_action;
+
jtag_tap_t *next_tap;
};
extern jtag_tap_t *jtag_AllTaps(void);
extern jtag_tap_t *jtag_TapByPosition(int n);
-extern jtag_tap_t *jtag_TapByPosition( int n );
-extern jtag_tap_t *jtag_TapByString( const char *dotted_name );
-extern jtag_tap_t *jtag_TapByJimObj( Jim_Interp *interp, Jim_Obj *obj );
-extern jtag_tap_t *jtag_TapByAbsPosition( int abs_position );
-extern int jtag_NumEnabledTaps(void);
-extern int jtag_NumTotalTaps(void);
-
+extern jtag_tap_t *jtag_TapByPosition(int n);
+extern jtag_tap_t *jtag_TapByString(const char *dotted_name);
+extern jtag_tap_t *jtag_TapByJimObj(Jim_Interp *interp, Jim_Obj *obj);
+extern jtag_tap_t *jtag_TapByAbsPosition(int abs_position);
+extern int jtag_NumEnabledTaps(void);
+extern int jtag_NumTotalTaps(void);
static __inline__ jtag_tap_t *
jtag_NextEnabledTap( jtag_tap_t *p )
{
if( p == NULL ){
- // start at the head of list
+ /* start at the head of list */
p = jtag_AllTaps();
} else {
- // start *after* this one
+ /* start *after* this one */
p = p->next_tap;
}
while( p ){
return p;
}
-
-
-
enum reset_line_mode
{
LINE_OPEN_DRAIN = 0x0,
JTAG_TRST_ASSERTED
};
-extern char* jtag_event_strings[];
+extern char * jtag_event_strings[];
+
+enum jtag_tap_event
+{
+ JTAG_TAP_EVENT_ENABLE,
+ JTAG_TAP_EVENT_DISABLE
+};
+
+extern const Jim_Nvp nvp_jtag_tap_event[];
+
+struct jtag_tap_event_action_s {
+ enum jtag_tap_event event;
+ Jim_Obj *body;
+ jtag_tap_event_action_t *next;
+};
extern int jtag_trst;
extern int jtag_srst;
* upon subsequent invocations
*/
extern int jtag_interface_init(struct command_context_s *cmd_ctx);
-/* initialize JTAG chain using only a TLR reset. If init fails,
+/* initialize JTAG chain using only a RESET reset. If init fails,
* try reset + init.
*/
extern int jtag_init(struct command_context_s *cmd_ctx);
/* JTAG interface, can be implemented with a software or hardware fifo
*
- * TAP_DRSHIFT and TAP_IRSHIFT are illegal end states. TAP_DRSHIFT/SI as end states
+ * TAP_DRSHIFT and TAP_IRSHIFT are illegal end states. TAP_DRSHIFT/IRSHIFT as end states
* can be emulated by using a larger scan.
*
* Code that is relatively insensitive to the path(as long
extern int interface_jtag_add_sleep(u32 us);
+/**
+ * Function jtag_add_stable_clocks
+ * first checks that the state in which the clocks are to be issued is
+ * stable, then queues up clock_count clocks for transmission.
+ */
+void jtag_add_clocks( int num_cycles );
+int interface_jtag_add_clocks( int num_cycles );
+
/*
* For software FIFO implementations, the queued commands can be executed
extern int jtag_power_dropout(int *dropout);
extern int jtag_srst_asserted(int *srst_asserted);
-
/* JTAG support functions */
extern void jtag_set_check_value(scan_field_t *field, u8 *value, u8 *mask, error_handler_t *in_error_handler);
extern enum scan_type jtag_scan_type(scan_command_t *cmd);
extern int jtag_verify_capture_ir;
+void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e);
+
/* error codes
* JTAG subsystem uses codes between -100 and -199 */
#define ERROR_JTAG_QUEUE_FAILED (-104)
#define ERROR_JTAG_DEVICE_ERROR (-107)
-
-
/* this allows JTAG devices to implement the entire jtag_xxx() layer in hw/sw */
#ifdef HAVE_JTAG_MINIDRIVER_H
/* Here a #define MINIDRIVER() and an inline version of hw fifo interface_jtag_add_dr_out can be defined */
enum tap_state end_state);
#endif
-
-
-
static __inline__ void jtag_add_dr_out(jtag_tap_t *tap,
int num_fields,
const int *num_bits,
interface_jtag_add_dr_out(tap, num_fields, num_bits, value, cmd_queue_end_state);
}
+/**
+ * Function jtag_state_name
+ * Returns a string suitable for display representing the JTAG tap_state
+ */
+const char* jtag_state_name(enum tap_state state);
+
#endif /* JTAG_H */
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