1 /***************************************************************************
2 * Copyright (C) 2007-2008 by Øyvind Harboe *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
23 #include "embeddedice.h"
24 #include "minidriver.h"
25 #include "interface.h"
27 #include <cyg/hal/hal_io.h> // low level i/o
28 #include <cyg/hal/hal_diag.h>
31 #define ZYLIN_VERSION "1.52"
32 #define ZYLIN_DATE __DATE__
33 #define ZYLIN_TIME __TIME__
34 #define ZYLIN_OPENOCD "$Revision$"
35 #define ZYLIN_OPENOCD_VERSION "Zylin JTAG ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE " " ZYLIN_TIME
36 const char *zylin_config_dir
="/config/settings";
38 /* low level command set
40 int zy1000_read(void);
41 static void zy1000_write(int tck
, int tms
, int tdi
);
42 void zy1000_reset(int trst
, int srst
);
45 int zy1000_speed(int speed
);
46 int zy1000_register_commands(struct command_context_s
*cmd_ctx
);
47 int zy1000_init(void);
48 int zy1000_quit(void);
50 /* interface commands */
51 int zy1000_handle_zy1000_port_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
);
53 static int zy1000_khz(int khz
, int *jtag_speed
)
61 *jtag_speed
=64000/khz
;
66 static int zy1000_speed_div(int speed
, int *khz
)
80 static bool readPowerDropout(void)
83 // sample and clear power dropout
84 HAL_WRITE_UINT32(ZY1000_JTAG_BASE
+0x10, 0x80);
85 HAL_READ_UINT32(ZY1000_JTAG_BASE
+0x10, state
);
87 powerDropout
= (state
& 0x80) != 0;
92 static bool readSRST(void)
95 // sample and clear SRST sensing
96 HAL_WRITE_UINT32(ZY1000_JTAG_BASE
+0x10, 0x00000040);
97 HAL_READ_UINT32(ZY1000_JTAG_BASE
+0x10, state
);
99 srstAsserted
= (state
& 0x40) != 0;
103 static int zy1000_srst_asserted(int *srst_asserted
)
105 *srst_asserted
=readSRST();
109 static int zy1000_power_dropout(int *dropout
)
111 *dropout
=readPowerDropout();
116 jtag_interface_t zy1000_interface
=
119 .execute_queue
= NULL
,
120 .speed
= zy1000_speed
,
121 .register_commands
= zy1000_register_commands
,
125 .speed_div
= zy1000_speed_div
,
126 .power_dropout
= zy1000_power_dropout
,
127 .srst_asserted
= zy1000_srst_asserted
,
130 static void zy1000_write(int tck
, int tms
, int tdi
)
135 int zy1000_read(void)
140 extern bool readSRST(void);
142 void zy1000_reset(int trst
, int srst
)
144 LOG_DEBUG("zy1000 trst=%d, srst=%d", trst
, srst
);
147 ZY1000_POKE(ZY1000_JTAG_BASE
+0x14, 0x00000001);
151 /* Danger!!! if clk!=0 when in
152 * idle in TAP_IDLE, reset halt on str912 will fail.
154 ZY1000_POKE(ZY1000_JTAG_BASE
+0x10, 0x00000001);
159 ZY1000_POKE(ZY1000_JTAG_BASE
+0x14, 0x00000002);
164 ZY1000_POKE(ZY1000_JTAG_BASE
+0x10, 0x00000002);
167 if (trst
||(srst
&&(jtag_reset_config
& RESET_SRST_PULLS_TRST
)))
170 /* we're now in the RESET state until trst is deasserted */
171 ZY1000_POKE(ZY1000_JTAG_BASE
+0x20, TAP_RESET
);
174 /* We'll get RCLK failure when we assert TRST, so clear any false positives here */
175 ZY1000_POKE(ZY1000_JTAG_BASE
+0x14, 0x400);
178 /* wait for srst to float back up */
182 for (i
=0; i
<1000; i
++)
184 // We don't want to sense our own reset, so we clear here.
185 // There is of course a timing hole where we could loose
196 LOG_USER("SRST didn't deassert after %dms", i
);
199 LOG_USER("SRST took %dms to deassert", i
);
204 int zy1000_speed(int speed
)
210 ZY1000_POKE(ZY1000_JTAG_BASE
+0x10, 0x100);
211 LOG_DEBUG("jtag_speed using RCLK");
215 if(speed
> 8190 || speed
< 2)
217 LOG_USER("valid ZY1000 jtag_speed=[8190,2]. Divisor is 64MHz / even values between 8190-2, i.e. min 7814Hz, max 32MHz");
218 return ERROR_INVALID_ARGUMENTS
;
221 LOG_USER("jtag_speed %d => JTAG clk=%f", speed
, 64.0/(float)speed
);
222 ZY1000_POKE(ZY1000_JTAG_BASE
+0x14, 0x100);
223 ZY1000_POKE(ZY1000_JTAG_BASE
+0x1c, speed
&~1);
228 static bool savePower
;
231 static void setPower(bool power
)
236 HAL_WRITE_UINT32(ZY1000_JTAG_BASE
+0x14, 0x8);
239 HAL_WRITE_UINT32(ZY1000_JTAG_BASE
+0x10, 0x8);
243 int handle_power_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
247 return ERROR_INVALID_ARGUMENTS
;
252 if (strcmp(args
[0], "on") == 0)
256 else if (strcmp(args
[0], "off") == 0)
261 command_print(cmd_ctx
, "arg is \"on\" or \"off\"");
262 return ERROR_INVALID_ARGUMENTS
;
266 command_print(cmd_ctx
, "Target power %s", savePower
? "on" : "off");
272 /* Give TELNET a way to find out what version this is */
273 static int jim_zy1000_version(Jim_Interp
*interp
, int argc
, Jim_Obj
*const *argv
)
275 if ((argc
< 1) || (argc
> 2))
278 const char *version_str
=NULL
;
282 version_str
=ZYLIN_OPENOCD_VERSION
;
285 const char *str
= Jim_GetString(argv
[1], NULL
);
286 if (strcmp("openocd", str
) == 0)
289 revision
= atol(ZYLIN_OPENOCD
+strlen("XRevision: "));
290 sprintf(buff
, "%d", revision
);
293 else if (strcmp("zy1000", str
) == 0)
295 version_str
=ZYLIN_VERSION
;
297 else if (strcmp("date", str
) == 0)
299 version_str
=ZYLIN_DATE
;
307 Jim_SetResult(interp
, Jim_NewStringObj(interp
, version_str
, -1));
314 zylinjtag_Jim_Command_powerstatus(Jim_Interp
*interp
,
316 Jim_Obj
* const *argv
)
320 Jim_WrongNumArgs(interp
, 1, argv
, "powerstatus");
325 ZY1000_PEEK(ZY1000_JTAG_BASE
+0x10, status
);
327 Jim_SetResult(interp
, Jim_NewIntObj(interp
, (status
&0x80)!=0));
332 int zy1000_register_commands(struct command_context_s
*cmd_ctx
)
334 register_command(cmd_ctx
, NULL
, "power", handle_power_command
, COMMAND_ANY
,
335 "power <on/off> - turn power switch to target on/off. No arguments - print status.");
337 Jim_CreateCommand(interp
, "zy1000_version", jim_zy1000_version
, NULL
, NULL
);
340 Jim_CreateCommand(interp
, "powerstatus", zylinjtag_Jim_Command_powerstatus
, NULL
, NULL
);
348 int zy1000_init(void)
350 LOG_USER("%s", ZYLIN_OPENOCD_VERSION
);
352 ZY1000_POKE(ZY1000_JTAG_BASE
+0x10, 0x30); // Turn on LED1 & LED2
354 setPower(true); // on by default
357 /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
359 zy1000_speed(jtag_speed
);
364 int zy1000_quit(void)
372 int interface_jtag_execute_queue(void)
377 ZY1000_PEEK(ZY1000_JTAG_BASE
+0x10, empty
);
378 /* clear JTAG error register */
379 ZY1000_POKE(ZY1000_JTAG_BASE
+0x14, 0x400);
381 if ((empty
&0x400)!=0)
383 LOG_WARNING("RCLK timeout");
384 /* the error is informative only as we don't want to break the firmware if there
385 * is a false positive.
387 // return ERROR_FAIL;
396 static cyg_uint32
getShiftValue(void)
400 ZY1000_PEEK(ZY1000_JTAG_BASE
+0xc, value
);
401 VERBOSE(LOG_INFO("getShiftValue %08x", value
));
405 static cyg_uint32
getShiftValueFlip(void)
409 ZY1000_PEEK(ZY1000_JTAG_BASE
+0x18, value
);
410 VERBOSE(LOG_INFO("getShiftValue %08x (flipped)", value
));
416 static void shiftValueInnerFlip(const tap_state_t state
, const tap_state_t endState
, int repeat
, cyg_uint32 value
)
418 VERBOSE(LOG_INFO("shiftValueInner %s %s %d %08x (flipped)", tap_state_name(state
), tap_state_name(endState
), repeat
, value
));
422 ZY1000_POKE(ZY1000_JTAG_BASE
+0xc, value
);
423 ZY1000_POKE(ZY1000_JTAG_BASE
+0x8, (1<<15)|(repeat
<<8)|(a
<<4)|b
);
424 VERBOSE(getShiftValueFlip());
428 extern int jtag_check_value(u8
*captured
, void *priv
);
430 static __inline
void scanFields(int num_fields
, scan_field_t
*fields
, tap_state_t shiftState
, tap_state_t end_state
)
436 for (i
= 0; i
< num_fields
; i
++)
440 static u8
*in_buff
=NULL
; /* pointer to buffer for scanned data */
441 static int in_buff_size
=0;
445 // figure out where to store the input data
446 int num_bits
=fields
[i
].num_bits
;
447 if (fields
[i
].in_value
!=NULL
)
449 inBuffer
=fields
[i
].in_value
;
452 // here we shuffle N bits out/in
456 tap_state_t pause_state
;
459 pause_state
=(shiftState
==TAP_DRSHIFT
)?TAP_DRSHIFT
:TAP_IRSHIFT
;
463 /* we have more to shift out */
464 } else if (i
== num_fields
-1)
466 /* this was the last to shift out this time */
467 pause_state
=end_state
;
470 // we have (num_bits+7)/8 bytes of bits to toggle out.
471 // bits are pushed out LSB to MSB
473 if (fields
[i
].out_value
!=NULL
)
477 value
|=fields
[i
].out_value
[(j
+l
)/8]<<l
;
480 /* mask away unused bits for easier debugging */
481 value
&=~(((u32
)0xffffffff)<<k
);
483 shiftValueInner(shiftState
, pause_state
, k
, value
);
487 // data in, LSB to MSB
488 value
=getShiftValue();
489 // we're shifting in data to MSB, shift data to be aligned for returning the value
494 inBuffer
[(j
+l
)/8]=(value
>>l
)&0xff;
502 int interface_jtag_set_end_state(tap_state_t state
)
508 int interface_jtag_add_ir_scan(int num_fields
, const scan_field_t
*fields
, tap_state_t state
)
513 jtag_tap_t
*tap
, *nextTap
;
514 for(tap
= jtag_tap_next_enabled(NULL
); tap
!= NULL
; tap
=nextTap
)
516 nextTap
=jtag_tap_next_enabled(tap
);
517 tap_state_t end_state
;
523 end_state
= TAP_IRSHIFT
;
528 scan_size
= tap
->ir_length
;
530 /* search the list */
531 for (j
=0; j
< num_fields
; j
++)
533 if (tap
== fields
[j
].tap
)
537 scanFields(1, fields
+j
, TAP_IRSHIFT
, end_state
);
538 /* update device information */
539 buf_cpy(fields
[j
].out_value
, tap
->cur_instr
, scan_size
);
548 /* if a device isn't listed, set it to BYPASS */
549 u8 ones
[]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
552 memset(&tmp
, 0, sizeof(tmp
));
553 tmp
.out_value
= ones
;
554 tmp
.num_bits
= scan_size
;
555 scanFields(1, &tmp
, TAP_IRSHIFT
, end_state
);
556 /* update device information */
557 buf_cpy(tmp
.out_value
, tap
->cur_instr
, scan_size
);
569 int interface_jtag_add_plain_ir_scan(int num_fields
, const scan_field_t
*fields
, tap_state_t state
)
571 scanFields(num_fields
, fields
, TAP_IRSHIFT
, state
);
576 /*extern jtag_command_t **jtag_get_last_command_p(void);*/
578 int interface_jtag_add_dr_scan(int num_fields
, const scan_field_t
*fields
, tap_state_t state
)
582 jtag_tap_t
*tap
, *nextTap
;
583 for(tap
= jtag_tap_next_enabled(NULL
); tap
!= NULL
; tap
=nextTap
)
585 nextTap
=jtag_tap_next_enabled(tap
);
587 tap_state_t end_state
;
593 end_state
= TAP_DRSHIFT
;
596 for (j
=0; j
< num_fields
; j
++)
598 if (tap
== fields
[j
].tap
)
602 scanFields(1, fields
+j
, TAP_DRSHIFT
, end_state
);
608 /* program the scan field to 1 bit length, and ignore it's value */
610 tmp
.out_value
= NULL
;
613 scanFields(1, &tmp
, TAP_DRSHIFT
, end_state
);
622 int interface_jtag_add_plain_dr_scan(int num_fields
, const scan_field_t
*fields
, tap_state_t state
)
624 scanFields(num_fields
, fields
, TAP_DRSHIFT
, state
);
629 int interface_jtag_add_tlr()
631 setCurrentState(TAP_RESET
);
638 extern int jtag_nsrst_delay
;
639 extern int jtag_ntrst_delay
;
641 int interface_jtag_add_reset(int req_trst
, int req_srst
)
643 zy1000_reset(req_trst
, req_srst
);
647 static int zy1000_jtag_add_clocks(int num_cycles
, tap_state_t state
, tap_state_t clockstate
)
649 /* num_cycles can be 0 */
650 setCurrentState(clockstate
);
652 /* execute num_cycles, 32 at the time. */
654 for (i
=0; i
<num_cycles
; i
+=32)
658 if (num_cycles
-i
<num
)
662 shiftValueInner(clockstate
, clockstate
, num
, 0);
666 /* finish in end_state */
667 setCurrentState(state
);
669 tap_state_t t
=TAP_IDLE
;
670 /* test manual drive code on any target */
672 u8 tms_scan
= tap_get_tms_path(t
, state
);
673 int tms_count
= tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
675 for (i
= 0; i
< tms_count
; i
++)
677 tms
= (tms_scan
>> i
) & 1;
679 ZY1000_POKE(ZY1000_JTAG_BASE
+0x28, tms
);
682 ZY1000_POKE(ZY1000_JTAG_BASE
+0x20, state
);
689 int interface_jtag_add_runtest(int num_cycles
, tap_state_t state
)
691 return zy1000_jtag_add_clocks(num_cycles
, state
, TAP_IDLE
);
694 int interface_jtag_add_clocks(int num_cycles
)
696 return zy1000_jtag_add_clocks(num_cycles
, cmd_queue_cur_state
, cmd_queue_cur_state
);
699 int interface_jtag_add_sleep(u32 us
)
705 int interface_jtag_add_pathmove(int num_states
, const tap_state_t
*path
)
710 /*wait for the fifo to be empty*/
715 tap_state_t cur_state
=cmd_queue_cur_state
;
719 if (tap_state_transition(cur_state
, false) == path
[state_count
])
723 else if (tap_state_transition(cur_state
, true) == path
[state_count
])
729 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(cur_state
), tap_state_name(path
[state_count
]));
734 ZY1000_POKE(ZY1000_JTAG_BASE
+0x28, tms
);
736 cur_state
= path
[state_count
];
742 ZY1000_POKE(ZY1000_JTAG_BASE
+0x20, cur_state
);
748 void embeddedice_write_dcc(jtag_tap_t
*tap
, int reg_addr
, u8
*buffer
, int little
, int count
)
750 // static int const reg_addr=0x5;
751 tap_state_t end_state
=jtag_get_end_state();
752 if (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL
))==NULL
)
754 /* better performance via code duplication */
758 for (i
= 0; i
< count
; i
++)
760 shiftValueInner(TAP_DRSHIFT
, TAP_DRSHIFT
, 32, fast_target_buffer_get_u32(buffer
, 1));
761 shiftValueInner(TAP_DRSHIFT
, end_state
, 6, reg_addr
|(1<<5));
767 for (i
= 0; i
< count
; i
++)
769 shiftValueInner(TAP_DRSHIFT
, TAP_DRSHIFT
, 32, fast_target_buffer_get_u32(buffer
, 0));
770 shiftValueInner(TAP_DRSHIFT
, end_state
, 6, reg_addr
|(1<<5));
778 for (i
= 0; i
< count
; i
++)
780 embeddedice_write_reg_inner(tap
, reg_addr
, fast_target_buffer_get_u32(buffer
, little
));
786 int loadFile(const char *fileName
, void **data
, int *len
);
788 /* boolean parameter stored on config */
789 int boolParam(char *var
)
792 char *name
= alloc_printf("%s/%s", zylin_config_dir
, var
);
798 if (loadFile(name
, &data
, &len
) == ERROR_OK
)
802 result
= strncmp((char *) data
, "1", len
) == 0;
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