1 /***************************************************************************
2 * Copyright (C) 2007 by Benedikt Sauter *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
22 * This file is based on Dominic Rath's amt_jtagaccel.c.
24 * usbprog is a free programming adapter. You can easily install
25 * different firmware versions from an "online pool" over USB.
26 * The adapter can be used for programming and debugging AVR and ARM
27 * processors, as USB to RS232 converter, as JTAG interface or as
28 * simple I/O interface (5 lines).
30 * http://www.embedded-projects.net/usbprog
51 static int usbprog_execute_queue(void);
52 static int usbprog_speed(int speed);
53 static int usbprog_register_commands(struct command_context_s *cmd_ctx);
54 static int usbprog_init(void);
55 static int usbprog_quit(void);
57 static void usbprog_end_state(tap_state_t state);
58 static void usbprog_state_move(void);
59 static void usbprog_path_move(pathmove_command_t *cmd);
60 static void usbprog_runtest(int num_cycles);
61 static void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size);
63 jtag_interface_t usbprog_interface =
66 .execute_queue = usbprog_execute_queue,
67 .speed = usbprog_speed,
68 .register_commands = usbprog_register_commands,
73 #define UNKOWN_COMMAND 0x00
74 #define PORT_DIRECTION 0x01
77 #define PORT_SETBIT 0x04
78 #define PORT_GETBIT 0x05
79 #define WRITE_TDI 0x06
81 #define WRITE_AND_READ 0x08
82 #define WRITE_TMS 0x09
83 #define WRITE_TMS_CHAIN 0x0A
87 struct usb_dev_handle* usb_handle;
90 static struct usbprog_jtag * usbprog_jtag_handle;
92 static struct usbprog_jtag* usbprog_jtag_open(void);
93 //static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
94 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
95 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
97 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
98 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
99 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
100 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
102 static char tms_chain[64];
103 static int tms_chain_index;
105 static void usbprog_jtag_tms_collect(char tms_scan);
106 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
108 static void usbprog_write(int tck, int tms, int tdi);
109 static void usbprog_reset(int trst, int srst);
111 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
112 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
113 //static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
114 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
115 //static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
117 static int usbprog_speed(int speed)
122 static int usbprog_register_commands(struct command_context_s *cmd_ctx)
127 static int usbprog_execute_queue(void)
129 jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
139 #ifdef _DEBUG_JTAG_IO_
140 LOG_DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
142 if (cmd->cmd.end_state->end_state != TAP_INVALID)
143 usbprog_end_state(cmd->cmd.end_state->end_state);
146 #ifdef _DEBUG_JTAG_IO_
147 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
149 if (cmd->cmd.reset->trst == 1)
151 tap_set_state(TAP_RESET);
153 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
156 #ifdef _DEBUG_JTAG_IO_
157 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
159 if (cmd->cmd.runtest->end_state != TAP_INVALID)
160 usbprog_end_state(cmd->cmd.runtest->end_state);
161 usbprog_runtest(cmd->cmd.runtest->num_cycles);
164 #ifdef _DEBUG_JTAG_IO_
165 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
167 if (cmd->cmd.statemove->end_state != TAP_INVALID)
168 usbprog_end_state(cmd->cmd.statemove->end_state);
169 usbprog_state_move();
172 #ifdef _DEBUG_JTAG_IO_
173 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
174 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
176 usbprog_path_move(cmd->cmd.pathmove);
179 #ifdef _DEBUG_JTAG_IO_
180 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
182 if (cmd->cmd.scan->end_state != TAP_INVALID)
183 usbprog_end_state(cmd->cmd.scan->end_state);
184 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
185 type = jtag_scan_type(cmd->cmd.scan);
186 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
187 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
188 return ERROR_JTAG_QUEUE_FAILED;
193 #ifdef _DEBUG_JTAG_IO_
194 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
196 jtag_sleep(cmd->cmd.sleep->us);
199 LOG_ERROR("BUG: unknown JTAG command type encountered");
209 static int usbprog_init(void)
211 usbprog_jtag_handle = usbprog_jtag_open();
214 if (usbprog_jtag_handle == 0)
216 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
217 return ERROR_JTAG_INIT_FAILED;
220 LOG_INFO("USB JTAG Interface ready!");
222 usbprog_jtag_init(usbprog_jtag_handle);
224 usbprog_write(0, 0, 0);
229 static int usbprog_quit(void)
234 /*************** jtag execute commands **********************/
235 static void usbprog_end_state(tap_state_t state)
237 if (tap_is_state_stable(state))
238 tap_set_end_state(state);
241 LOG_ERROR("BUG: %i is not a valid end state", state);
246 static void usbprog_state_move(void)
249 u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
251 usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
252 for (i = 0; i < 7; i++)
254 tms = (tms_scan >> i) & 1;
257 tap_set_state(tap_get_end_state());
260 static void usbprog_path_move(pathmove_command_t *cmd)
262 int num_states = cmd->num_states;
265 /* There may be queued transitions, and before following a specified
266 path, we must flush those queued transitions */
267 usbprog_jtag_tms_send(usbprog_jtag_handle);
272 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
275 usbprog_write(0, 0, 0);
276 usbprog_write(1, 0, 0);
278 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
281 usbprog_write(0, 1, 0);
282 usbprog_write(1, 1, 0);
286 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
290 tap_set_state(cmd->path[state_count]);
295 tap_set_end_state(tap_get_state());
298 static void usbprog_runtest(int num_cycles)
302 /* only do a state_move when we're not already in IDLE */
303 if (tap_get_state() != TAP_IDLE)
305 usbprog_end_state(TAP_IDLE);
306 usbprog_state_move();
309 /* execute num_cycles */
312 usbprog_jtag_tms_send(usbprog_jtag_handle);
313 usbprog_write(0, 0, 0);
317 usbprog_jtag_tms_send(usbprog_jtag_handle);
318 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
321 for (i = 0; i < num_cycles; i++)
323 usbprog_write(1, 0, 0);
324 usbprog_write(0, 0, 0);
327 #ifdef _DEBUG_JTAG_IO_
328 LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
331 /* finish in end_state */
333 usbprog_end_state(saved_end_state);
334 if (tap_get_state() != tap_get_end_state())
335 usbprog_state_move();
339 static void usbprog_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
341 tap_state_t saved_end_state = tap_get_end_state();
344 usbprog_end_state(TAP_IRSHIFT);
346 usbprog_end_state(TAP_DRSHIFT);
348 /* Only move if we're not already there */
349 if (tap_get_state() != tap_get_end_state())
350 usbprog_state_move();
352 usbprog_end_state(saved_end_state);
354 usbprog_jtag_tms_send(usbprog_jtag_handle);
356 void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
358 case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
359 case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
360 case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
362 LOG_ERROR("unknown scan type: %i", type);
365 f(usbprog_jtag_handle, (char *)buffer, scan_size);
367 /* The adapter does the transition to PAUSE internally */
369 tap_set_state(TAP_IRPAUSE);
371 tap_set_state(TAP_DRPAUSE);
373 if (tap_get_state() != tap_get_end_state())
374 usbprog_state_move();
377 /*************** jtag wrapper functions *********************/
379 static void usbprog_write(int tck, int tms, int tdi)
381 unsigned char output_value=0x00;
384 output_value |= (1<<TMS_BIT);
386 output_value |= (1<<TDI_BIT);
388 output_value |= (1<<TCK_BIT);
390 usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
393 /* (1) assert or (0) deassert reset lines */
394 static void usbprog_reset(int trst, int srst)
396 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
399 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
401 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
404 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
406 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
409 /*************** jtag lowlevel functions ********************/
411 struct usb_bus *busses;
413 struct usbprog_jtag* usbprog_jtag_open(void)
416 struct usb_device *dev;
418 struct usbprog_jtag *tmp;
420 tmp = (struct usbprog_jtag*)malloc(sizeof(struct usbprog_jtag));
427 busses = usb_get_busses();
429 /* find usbprog_jtag device in usb bus */
431 for (bus = busses; bus; bus = bus->next)
433 for (dev = bus->devices; dev; dev = dev->next)
435 /* condition for sucessfully hit (too bad, I only check the vendor id)*/
436 if (dev->descriptor.idVendor == VID && dev->descriptor.idProduct == PID)
438 tmp->usb_handle = usb_open(dev);
439 usb_set_configuration(tmp->usb_handle, 1);
440 usb_claim_interface(tmp->usb_handle, 0);
441 usb_set_altinterface(tmp->usb_handle, 0);
450 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
452 usb_close(usbprog_jtag->usb_handle);
457 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
459 int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
460 if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
461 (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
465 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
466 res = usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
468 return (unsigned char)msg[1];
477 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
479 usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
482 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
484 char tmp[64]; /* fastes packet size for usb controller */
485 int send_bits, bufindex = 0, fillindex = 0, i, loops;
488 /* 61 byte can be transfered (488 bit) */
505 tmp[0] = WRITE_AND_READ;
506 tmp[1] = (char)(send_bits >> 8); /* high */
507 tmp[2] = (char)(send_bits); /* low */
510 for (i = 0; i < loops; i++)
512 tmp[3 + i] = buffer[bufindex];
516 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
518 /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
521 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
528 for (i = 0; i < loops; i++)
531 buffer[fillindex++] = swap;
537 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
539 char tmp[64]; /* fastes packet size for usb controller */
540 int send_bits, fillindex = 0, i, loops;
543 /* 61 byte can be transfered (488 bit) */
560 tmp[0] = WRITE_AND_READ;
561 tmp[1] = (char)(send_bits >> 8); /* high */
562 tmp[2] = (char)(send_bits); /* low */
564 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
566 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
569 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
576 for (i = 0; i < loops; i++)
579 buffer[fillindex++] = swap;
584 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
586 char tmp[64]; /* fastes packet size for usb controller */
587 int send_bits, bufindex = 0, i, loops;
589 /* 61 byte can be transfered (488 bit) */
607 tmp[1] = (char)(send_bits >> 8); /* high */
608 tmp[2] = (char)(send_bits); /* low */
611 for (i = 0; i < loops; i++)
613 tmp[3 + i] = buffer[bufindex];
616 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
620 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
622 usbprog_jtag_tms_collect(tms_scan);
625 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
628 tmp[0] = PORT_DIRECTION;
629 tmp[1] = (char)direction;
630 usbprog_jtag_message(usbprog_jtag, tmp, 2);
633 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
637 tmp[1] = (char)value;
638 usbprog_jtag_message(usbprog_jtag, tmp, 2);
642 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
647 return usbprog_jtag_message(usbprog_jtag, tmp, 2);
651 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
654 tmp[0] = PORT_SETBIT;
660 usbprog_jtag_message(usbprog_jtag, tmp, 3);
664 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
667 tmp[0] = PORT_GETBIT;
670 if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
677 static void usbprog_jtag_tms_collect(char tms_scan)
679 tms_chain[tms_chain_index] = tms_scan;
683 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
686 /* LOG_INFO("TMS SEND"); */
687 if (tms_chain_index > 0)
689 char tmp[tms_chain_index + 2];
690 tmp[0] = WRITE_TMS_CHAIN;
691 tmp[1] = (char)(tms_chain_index);
692 for (i = 0; i < tms_chain_index + 1; i++)
693 tmp[2 + i] = tms_chain[i];
694 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);