1 /***************************************************************************
2 * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
3 * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
28 #include "replacements.h"
37 /* enable this to debug communication
40 #define _DEBUG_USB_COMMS_
43 #ifdef _DEBUG_JTAG_IO_
44 #define DEBUG_JTAG_IO(expr ...) LOG_DEBUG(expr)
46 #define DEBUG_JTAG_IO(expr ...)
52 #define JLINK_WRITE_ENDPOINT 0x02
53 #define JLINK_READ_ENDPOINT 0x81
55 #define JLINK_USB_TIMEOUT 1000
57 #define JLINK_IN_BUFFER_SIZE 8192
58 #define JLINK_OUT_BUFFER_SIZE 8192
59 #define JLINK_EMU_RESULT_BUFFER_SIZE 64
61 /* Global USB buffers */
62 static u8 usb_in_buffer
[JLINK_IN_BUFFER_SIZE
];
63 static u8 usb_out_buffer
[JLINK_OUT_BUFFER_SIZE
];
64 static u8 usb_emu_result_buffer
[JLINK_EMU_RESULT_BUFFER_SIZE
];
66 /* Constants for JLink command */
67 #define EMU_CMD_VERSION 0x01
68 #define EMU_CMD_SET_SPEED 0x05
69 #define EMU_CMD_GET_STATE 0x07
70 #define EMU_CMD_HW_JTAG3 0xcf
71 #define EMU_CMD_HW_RESET0 0xdc
72 #define EMU_CMD_HW_RESET1 0xdd
73 #define EMU_CMD_HW_TRST0 0xde
74 #define EMU_CMD_HW_TRST1 0xdf
76 /* max speed 12MHz v5.0 jlink */
77 #define JLINK_MAX_SPEED 12000
79 /* External interface functions */
80 int jlink_execute_queue(void);
81 int jlink_speed(int speed
);
82 int jlink_speed_div(int speed
, int* khz
);
83 int jlink_khz(int khz
, int *jtag_speed
);
84 int jlink_register_commands(struct command_context_s
*cmd_ctx
);
88 /* CLI command handler functions */
89 int jlink_handle_jlink_info_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
);
91 /* Queue command functions */
92 void jlink_end_state(tap_state_t state
);
93 void jlink_state_move(void);
94 void jlink_path_move(int num_states
, tap_state_t
*path
);
95 void jlink_runtest(int num_cycles
);
96 void jlink_scan(int ir_scan
, enum scan_type type
, u8
*buffer
, int scan_size
, scan_command_t
*command
);
97 void jlink_reset(int trst
, int srst
);
98 void jlink_simple_command(u8 command
);
99 int jlink_get_status(void);
101 /* J-Link tap buffer functions */
102 void jlink_tap_init(void);
103 int jlink_tap_execute(void);
104 void jlink_tap_ensure_space(int scans
, int bits
);
105 void jlink_tap_append_step(int tms
, int tdi
);
106 void jlink_tap_append_scan(int length
, u8
*buffer
, scan_command_t
*command
);
108 /* Jlink lowlevel functions */
109 typedef struct jlink_jtag
111 struct usb_dev_handle
* usb_handle
;
114 jlink_jtag_t
*jlink_usb_open(void);
115 void jlink_usb_close(jlink_jtag_t
*jlink_jtag
);
116 int jlink_usb_message(jlink_jtag_t
*jlink_jtag
, int out_length
, int in_length
);
117 int jlink_usb_write(jlink_jtag_t
*jlink_jtag
, int out_length
);
118 int jlink_usb_read(jlink_jtag_t
*jlink_jtag
);
119 int jlink_usb_read_emu_result(jlink_jtag_t
*jlink_jtag
);
121 /* helper functions */
122 int jlink_get_version_info(void);
124 #ifdef _DEBUG_USB_COMMS_
125 void jlink_debug_buffer(u8
*buffer
, int length
);
128 jlink_jtag_t
* jlink_jtag_handle
;
130 /***************************************************************************/
131 /* External interface implementation */
133 jtag_interface_t jlink_interface
=
136 .execute_queue
= jlink_execute_queue
,
137 .speed
= jlink_speed
,
138 .speed_div
= jlink_speed_div
,
140 .register_commands
= jlink_register_commands
,
145 int jlink_execute_queue(void)
147 jtag_command_t
*cmd
= jtag_command_queue
;
157 DEBUG_JTAG_IO("end_state: %i", cmd
->cmd
.end_state
->end_state
);
159 if (cmd
->cmd
.end_state
->end_state
!= TAP_INVALID
)
161 jlink_end_state(cmd
->cmd
.end_state
->end_state
);
166 DEBUG_JTAG_IO( "runtest %i cycles, end in %i", cmd
->cmd
.runtest
->num_cycles
, \
167 cmd
->cmd
.runtest
->end_state
);
169 if (cmd
->cmd
.runtest
->end_state
!= TAP_INVALID
)
171 jlink_end_state(cmd
->cmd
.runtest
->end_state
);
173 jlink_runtest(cmd
->cmd
.runtest
->num_cycles
);
177 DEBUG_JTAG_IO("statemove end in %i", cmd
->cmd
.statemove
->end_state
);
179 if (cmd
->cmd
.statemove
->end_state
!= TAP_INVALID
)
181 jlink_end_state(cmd
->cmd
.statemove
->end_state
);
187 DEBUG_JTAG_IO("pathmove: %i states, end in %i", \
188 cmd
->cmd
.pathmove
->num_states
, \
189 cmd
->cmd
.pathmove
->path
[cmd
->cmd
.pathmove
->num_states
- 1]);
191 jlink_path_move(cmd
->cmd
.pathmove
->num_states
, cmd
->cmd
.pathmove
->path
);
195 DEBUG_JTAG_IO("scan end in %i", cmd
->cmd
.scan
->end_state
);
197 if (cmd
->cmd
.scan
->end_state
!= TAP_INVALID
)
199 jlink_end_state(cmd
->cmd
.scan
->end_state
);
202 scan_size
= jtag_build_buffer(cmd
->cmd
.scan
, &buffer
);
203 DEBUG_JTAG_IO("scan input, length = %d", scan_size
);
205 #ifdef _DEBUG_USB_COMMS_
206 jlink_debug_buffer(buffer
, (scan_size
+ 7) / 8);
208 type
= jtag_scan_type(cmd
->cmd
.scan
);
209 jlink_scan(cmd
->cmd
.scan
->ir_scan
, type
, buffer
, scan_size
, cmd
->cmd
.scan
);
213 DEBUG_JTAG_IO("reset trst: %i srst %i", cmd
->cmd
.reset
->trst
, cmd
->cmd
.reset
->srst
);
217 if (cmd
->cmd
.reset
->trst
== 1)
219 tap_set_state(TAP_RESET
);
221 jlink_reset(cmd
->cmd
.reset
->trst
, cmd
->cmd
.reset
->srst
);
225 DEBUG_JTAG_IO("sleep %i", cmd
->cmd
.sleep
->us
);
227 jtag_sleep(cmd
->cmd
.sleep
->us
);
231 LOG_ERROR("BUG: unknown JTAG command type encountered");
237 return jlink_tap_execute();
240 /* Sets speed in kHz. */
241 int jlink_speed(int speed
)
245 if (speed
<= JLINK_MAX_SPEED
)
247 /* check for RTCK setting */
251 usb_out_buffer
[0] = EMU_CMD_SET_SPEED
;
252 usb_out_buffer
[1] = (speed
>> 0) & 0xff;
253 usb_out_buffer
[2] = (speed
>> 8) & 0xff;
255 result
= jlink_usb_write(jlink_jtag_handle
, 3);
263 LOG_ERROR("J-Link setting speed failed (%d)", result
);
264 return ERROR_JTAG_DEVICE_ERROR
;
269 LOG_INFO("Requested speed %dkHz exceeds maximum of %dkHz, ignored", speed
, JLINK_MAX_SPEED
);
275 int jlink_speed_div(int speed
, int* khz
)
282 int jlink_khz(int khz
, int *jtag_speed
)
289 int jlink_register_commands(struct command_context_s
*cmd_ctx
)
291 register_command(cmd_ctx
, NULL
, "jlink_info", jlink_handle_jlink_info_command
, COMMAND_EXEC
,
300 jlink_jtag_handle
= jlink_usb_open();
302 if (jlink_jtag_handle
== 0)
304 LOG_ERROR("Cannot find jlink Interface! Please check connection and permissions.");
305 return ERROR_JTAG_INIT_FAILED
;
309 while (check_cnt
< 3)
311 if (jlink_get_version_info() == ERROR_OK
)
313 /* attempt to get status */
323 LOG_INFO("J-Link initial read failed, don't worry");
326 LOG_INFO("J-Link JTAG Interface ready");
336 jlink_usb_close(jlink_jtag_handle
);
340 /***************************************************************************/
341 /* Queue command implementations */
343 void jlink_end_state(tap_state_t state
)
345 if (tap_is_state_stable(state
))
347 tap_set_end_state(state
);
351 LOG_ERROR("BUG: %i is not a valid end state", state
);
356 /* Goes to the end state. */
357 void jlink_state_move(void)
361 u8 tms_scan
= tap_get_tms_path(tap_get_state(), tap_get_end_state());
363 for (i
= 0; i
< 7; i
++)
365 tms
= (tms_scan
>> i
) & 1;
366 jlink_tap_append_step(tms
, 0);
369 tap_set_state(tap_get_end_state());
372 void jlink_path_move(int num_states
, tap_state_t
*path
)
376 for (i
= 0; i
< num_states
; i
++)
378 if (path
[i
] == tap_state_transition(tap_get_state(), false))
380 jlink_tap_append_step(0, 0);
382 else if (path
[i
] == tap_state_transition(tap_get_state(), true))
384 jlink_tap_append_step(1, 0);
388 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path
[i
]));
392 tap_set_state(path
[i
]);
395 tap_set_end_state(tap_get_state());
398 void jlink_runtest(int num_cycles
)
402 tap_state_t saved_end_state
= tap_get_end_state();
404 /* only do a state_move when we're not already in IDLE */
405 if (tap_get_state() != TAP_IDLE
)
407 jlink_end_state(TAP_IDLE
);
411 /* execute num_cycles */
412 for (i
= 0; i
< num_cycles
; i
++)
414 jlink_tap_append_step(0, 0);
417 /* finish in end_state */
418 jlink_end_state(saved_end_state
);
419 if (tap_get_state() != tap_get_end_state())
425 void jlink_scan(int ir_scan
, enum scan_type type
, u8
*buffer
, int scan_size
, scan_command_t
*command
)
427 tap_state_t saved_end_state
;
429 jlink_tap_ensure_space(1, scan_size
+ 8);
431 saved_end_state
= tap_get_end_state();
433 /* Move to appropriate scan state */
434 jlink_end_state(ir_scan
? TAP_IRSHIFT
: TAP_DRSHIFT
);
437 jlink_end_state(saved_end_state
);
440 jlink_tap_append_scan(scan_size
, buffer
, command
);
442 /* We are in Exit1, go to Pause */
443 jlink_tap_append_step(0, 0);
445 tap_set_state(ir_scan
? TAP_IRPAUSE
: TAP_DRPAUSE
);
447 if (tap_get_state() != tap_get_end_state())
453 void jlink_reset(int trst
, int srst
)
455 LOG_DEBUG("trst: %i, srst: %i", trst
, srst
);
457 /* Signals are active low */
460 jlink_simple_command(EMU_CMD_HW_RESET1
);
464 jlink_simple_command(EMU_CMD_HW_RESET0
);
469 jlink_simple_command(EMU_CMD_HW_TRST1
);
473 jlink_simple_command(EMU_CMD_HW_TRST0
);
477 void jlink_simple_command(u8 command
)
481 DEBUG_JTAG_IO("0x%02x", command
);
483 usb_out_buffer
[0] = command
;
484 result
= jlink_usb_write(jlink_jtag_handle
, 1);
488 LOG_ERROR("J-Link command 0x%02x failed (%d)", command
, result
);
492 int jlink_get_status(void)
496 jlink_simple_command(EMU_CMD_GET_STATE
);
497 result
= jlink_usb_read(jlink_jtag_handle
);
501 int vref
= usb_in_buffer
[0] + (usb_in_buffer
[1] << 8);
502 LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d\n", \
503 vref
/ 1000, vref
% 1000, \
504 usb_in_buffer
[2], usb_in_buffer
[3], usb_in_buffer
[4], \
505 usb_in_buffer
[5], usb_in_buffer
[6], usb_in_buffer
[7]);
509 LOG_ERROR("Vref too low. Check Target Power\n");
514 LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)\n", result
);
520 int jlink_get_version_info(void)
525 /* query hardware version */
526 jlink_simple_command(EMU_CMD_VERSION
);
527 result
= jlink_usb_read(jlink_jtag_handle
);
531 len
= buf_get_u32(usb_in_buffer
, 0, 16);
532 result
= jlink_usb_read(jlink_jtag_handle
);
536 usb_in_buffer
[result
] = 0;
537 LOG_INFO((char *)usb_in_buffer
);
542 LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result
);
543 return ERROR_JTAG_DEVICE_ERROR
;
546 int jlink_handle_jlink_info_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
548 if (jlink_get_version_info() == ERROR_OK
)
550 /* attempt to get status */
557 /***************************************************************************/
558 /* J-Link tap functions */
560 /* 2048 is the max value we can use here */
561 #define JLINK_TAP_BUFFER_SIZE 2048
563 static int tap_length
;
564 static u8 tms_buffer
[JLINK_TAP_BUFFER_SIZE
];
565 static u8 tdi_buffer
[JLINK_TAP_BUFFER_SIZE
];
566 static u8 tdo_buffer
[JLINK_TAP_BUFFER_SIZE
];
570 int first
; /* First bit position in tdo_buffer to read */
571 int length
; /* Number of bits to read */
572 scan_command_t
*command
; /* Corresponding scan command */
574 } pending_scan_result_t
;
576 #define MAX_PENDING_SCAN_RESULTS 256
578 static int pending_scan_results_length
;
579 static pending_scan_result_t pending_scan_results_buffer
[MAX_PENDING_SCAN_RESULTS
];
583 void jlink_tap_init(void)
586 pending_scan_results_length
= 0;
589 void jlink_tap_ensure_space(int scans
, int bits
)
591 int available_scans
= MAX_PENDING_SCAN_RESULTS
- pending_scan_results_length
;
592 int available_bits
= JLINK_TAP_BUFFER_SIZE
* 8 - tap_length
;
594 if (scans
> available_scans
|| bits
> available_bits
)
600 void jlink_tap_append_step(int tms
, int tdi
)
603 int index
= tap_length
/ 8;
605 if (index
< JLINK_TAP_BUFFER_SIZE
)
607 int bit_index
= tap_length
% 8;
608 u8 bit
= 1 << bit_index
;
612 tms_buffer
[index
] |= bit
;
616 tms_buffer
[index
] &= ~bit
;
621 tdi_buffer
[index
] |= bit
;
625 tdi_buffer
[index
] &= ~bit
;
632 LOG_ERROR("jlink_tap_append_step, overflow");
636 void jlink_tap_append_scan(int length
, u8
*buffer
, scan_command_t
*command
)
638 pending_scan_result_t
*pending_scan_result
= &pending_scan_results_buffer
[pending_scan_results_length
];
641 pending_scan_result
->first
= tap_length
;
642 pending_scan_result
->length
= length
;
643 pending_scan_result
->command
= command
;
644 pending_scan_result
->buffer
= buffer
;
646 for (i
= 0; i
< length
; i
++)
648 jlink_tap_append_step((i
< length
-1 ? 0 : 1), (buffer
[i
/8] >> (i
%8)) & 1);
650 pending_scan_results_length
++;
653 /* Pad and send a tap sequence to the device, and receive the answer.
654 * For the purpose of padding we assume that we are in idle or pause state. */
655 int jlink_tap_execute(void)
665 /* Pad last byte so that tap_length is divisible by 8 */
666 while (tap_length
% 8 != 0)
668 /* More of the last TMS value keeps us in the same state,
669 * analogous to free-running JTAG interfaces. */
670 jlink_tap_append_step(last_tms
, 0);
673 byte_length
= tap_length
/ 8;
675 usb_out_buffer
[0] = EMU_CMD_HW_JTAG3
;
676 usb_out_buffer
[1] = 0;
677 usb_out_buffer
[2] = (tap_length
>> 0) & 0xff;
678 usb_out_buffer
[3] = (tap_length
>> 8) & 0xff;
681 for (i
= 0; i
< byte_length
; i
++)
683 usb_out_buffer
[tms_offset
+ i
] = tms_buffer
[i
];
686 tdi_offset
= tms_offset
+ byte_length
;
687 for (i
= 0; i
< byte_length
; i
++)
689 usb_out_buffer
[tdi_offset
+ i
] = tdi_buffer
[i
];
692 result
= jlink_usb_message(jlink_jtag_handle
, 4 + 2 * byte_length
, byte_length
);
694 if (result
== byte_length
)
696 for (i
= 0; i
< byte_length
; i
++)
698 tdo_buffer
[i
] = usb_in_buffer
[i
];
701 for (i
= 0; i
< pending_scan_results_length
; i
++)
703 pending_scan_result_t
*pending_scan_result
= &pending_scan_results_buffer
[i
];
704 u8
*buffer
= pending_scan_result
->buffer
;
705 int length
= pending_scan_result
->length
;
706 int first
= pending_scan_result
->first
;
707 scan_command_t
*command
= pending_scan_result
->command
;
710 buf_set_buf(tdo_buffer
, first
, buffer
, 0, length
);
712 DEBUG_JTAG_IO("pending scan result, length = %d", length
);
714 #ifdef _DEBUG_USB_COMMS_
715 jlink_debug_buffer(buffer
, byte_length
);
718 if (jtag_read_buffer(buffer
, command
) != ERROR_OK
)
721 return ERROR_JTAG_QUEUE_FAILED
;
724 if (pending_scan_result
->buffer
!= NULL
)
726 free(pending_scan_result
->buffer
);
732 LOG_ERROR("jlink_tap_execute, wrong result %d, expected %d", result
, byte_length
);
733 return ERROR_JTAG_QUEUE_FAILED
;
742 /*****************************************************************************/
743 /* JLink USB low-level functions */
745 jlink_jtag_t
* jlink_usb_open()
747 struct usb_bus
*busses
;
749 struct usb_device
*dev
;
751 jlink_jtag_t
*result
;
753 result
= (jlink_jtag_t
*) malloc(sizeof(jlink_jtag_t
));
759 busses
= usb_get_busses();
761 /* find jlink_jtag device in usb bus */
763 for (bus
= busses
; bus
; bus
= bus
->next
)
765 for (dev
= bus
->devices
; dev
; dev
= dev
->next
)
767 if ((dev
->descriptor
.idVendor
== VID
) && (dev
->descriptor
.idProduct
== PID
))
769 result
->usb_handle
= usb_open(dev
);
771 /* usb_set_configuration required under win32 */
772 usb_set_configuration(result
->usb_handle
, dev
->config
[0].bConfigurationValue
);
773 usb_claim_interface(result
->usb_handle
, 0);
777 * This makes problems under Mac OS X. And is not needed
778 * under Windows. Hopefully this will not break a linux build
780 usb_set_altinterface(result
->usb_handle
, 0);
791 void jlink_usb_close(jlink_jtag_t
*jlink_jtag
)
793 usb_close(jlink_jtag
->usb_handle
);
797 /* Send a message and receive the reply. */
798 int jlink_usb_message(jlink_jtag_t
*jlink_jtag
, int out_length
, int in_length
)
803 result
= jlink_usb_write(jlink_jtag
, out_length
);
804 if (result
== out_length
)
806 result
= jlink_usb_read(jlink_jtag
);
807 if (result
== in_length
|| result
== in_length
+1)
809 if (result
== in_length
)
811 /* Must read the result from the EMU too */
812 result2
= jlink_usb_read_emu_result(jlink_jtag
);
815 /* Check the result itself */
816 if (0 == usb_emu_result_buffer
[0])
822 LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_emu_result_buffer
[0]);
828 LOG_ERROR("jlink_usb_read_emu_result len (requested=1, result=%d)", result2
);
834 /* Check the result itself */
835 if (0 == usb_in_buffer
[result
-1])
841 LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_in_buffer
[result
]);
848 LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length
, result
);
854 LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length
, result
);
859 /* Write data from out_buffer to USB. */
860 int jlink_usb_write(jlink_jtag_t
*jlink_jtag
, int out_length
)
864 if (out_length
> JLINK_OUT_BUFFER_SIZE
)
866 LOG_ERROR("jlink_jtag_write illegal out_length=%d (max=%d)", out_length
, JLINK_OUT_BUFFER_SIZE
);
870 result
= usb_bulk_write(jlink_jtag
->usb_handle
, JLINK_WRITE_ENDPOINT
,
871 (char *)usb_out_buffer
, out_length
, JLINK_USB_TIMEOUT
);
873 DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d", out_length
, result
);
875 #ifdef _DEBUG_USB_COMMS_
876 jlink_debug_buffer(usb_out_buffer
, out_length
);
881 /* Read data from USB into in_buffer. */
882 int jlink_usb_read(jlink_jtag_t
*jlink_jtag
)
884 int result
= usb_bulk_read(jlink_jtag
->usb_handle
, JLINK_READ_ENDPOINT
,
885 (char *)usb_in_buffer
, JLINK_IN_BUFFER_SIZE
, JLINK_USB_TIMEOUT
);
887 DEBUG_JTAG_IO("jlink_usb_read, result = %d", result
);
889 #ifdef _DEBUG_USB_COMMS_
890 jlink_debug_buffer(usb_in_buffer
, result
);
895 /* Read the result from the previous EMU cmd into result_buffer. */
896 int jlink_usb_read_emu_result(jlink_jtag_t
*jlink_jtag
)
898 int result
= usb_bulk_read(jlink_jtag
->usb_handle
, JLINK_READ_ENDPOINT
,
899 (char *)usb_emu_result_buffer
, JLINK_EMU_RESULT_BUFFER_SIZE
,
902 DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result
);
904 #ifdef _DEBUG_USB_COMMS_
905 jlink_debug_buffer(usb_emu_result_buffer
, result
);
910 #ifdef _DEBUG_USB_COMMS_
911 #define BYTES_PER_LINE 16
913 void jlink_debug_buffer(u8
*buffer
, int length
)
920 for (i
= 0; i
< length
; i
+= BYTES_PER_LINE
)
922 snprintf(line
, 5, "%04x", i
);
923 for (j
= i
; j
< i
+ BYTES_PER_LINE
&& j
< length
; j
++)
925 snprintf(s
, 4, " %02x", buffer
[j
]);
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