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
37 #include "interface.h"
39 #include "usb_common.h"
51 static void usbprog_end_state(tap_state_t state);
52 static void usbprog_state_move(void);
53 static void usbprog_path_move(struct pathmove_command *cmd);
54 static void usbprog_runtest(int num_cycles);
55 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size);
57 #define UNKOWN_COMMAND 0x00
58 #define PORT_DIRECTION 0x01
61 #define PORT_SETBIT 0x04
62 #define PORT_GETBIT 0x05
63 #define WRITE_TDI 0x06
65 #define WRITE_AND_READ 0x08
66 #define WRITE_TMS 0x09
67 #define WRITE_TMS_CHAIN 0x0A
71 struct usb_dev_handle* usb_handle;
74 static struct usbprog_jtag * usbprog_jtag_handle;
76 static struct usbprog_jtag* usbprog_jtag_open(void);
77 //static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag);
78 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
79 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
81 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
82 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
83 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
84 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
86 static char tms_chain[64];
87 static int tms_chain_index;
89 static void usbprog_jtag_tms_collect(char tms_scan);
90 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
92 static void usbprog_write(int tck, int tms, int tdi);
93 static void usbprog_reset(int trst, int srst);
95 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
96 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value);
97 //static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag);
98 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value);
99 //static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit);
101 static int usbprog_speed(int speed)
106 static int usbprog_execute_queue(void)
108 struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
118 #ifdef _DEBUG_JTAG_IO_
119 LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
121 if (cmd->cmd.reset->trst == 1)
123 tap_set_state(TAP_RESET);
125 usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
128 #ifdef _DEBUG_JTAG_IO_
129 LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
131 usbprog_end_state(cmd->cmd.runtest->end_state);
132 usbprog_runtest(cmd->cmd.runtest->num_cycles);
135 #ifdef _DEBUG_JTAG_IO_
136 LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
138 usbprog_end_state(cmd->cmd.statemove->end_state);
139 usbprog_state_move();
142 #ifdef _DEBUG_JTAG_IO_
143 LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states,
144 cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
146 usbprog_path_move(cmd->cmd.pathmove);
149 #ifdef _DEBUG_JTAG_IO_
150 LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
152 usbprog_end_state(cmd->cmd.scan->end_state);
153 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
154 type = jtag_scan_type(cmd->cmd.scan);
155 usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
156 if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
157 return ERROR_JTAG_QUEUE_FAILED;
162 #ifdef _DEBUG_JTAG_IO_
163 LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
165 jtag_sleep(cmd->cmd.sleep->us);
168 LOG_ERROR("BUG: unknown JTAG command type encountered");
178 static int usbprog_init(void)
180 usbprog_jtag_handle = usbprog_jtag_open();
183 if (usbprog_jtag_handle == 0)
185 LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
186 return ERROR_JTAG_INIT_FAILED;
189 LOG_INFO("USB JTAG Interface ready!");
191 usbprog_jtag_init(usbprog_jtag_handle);
193 usbprog_write(0, 0, 0);
198 static int usbprog_quit(void)
203 /*************** jtag execute commands **********************/
204 static void usbprog_end_state(tap_state_t state)
206 if (tap_is_state_stable(state))
207 tap_set_end_state(state);
210 LOG_ERROR("BUG: %i is not a valid end state", state);
215 static void usbprog_state_move(void)
218 uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
219 int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
221 usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
222 for (i = 0; i < tms_count; i++)
224 tms = (tms_scan >> i) & 1;
227 tap_set_state(tap_get_end_state());
230 static void usbprog_path_move(struct pathmove_command *cmd)
232 int num_states = cmd->num_states;
235 /* There may be queued transitions, and before following a specified
236 path, we must flush those queued transitions */
237 usbprog_jtag_tms_send(usbprog_jtag_handle);
242 if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
245 usbprog_write(0, 0, 0);
246 usbprog_write(1, 0, 0);
248 else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
251 usbprog_write(0, 1, 0);
252 usbprog_write(1, 1, 0);
256 LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
260 tap_set_state(cmd->path[state_count]);
265 tap_set_end_state(tap_get_state());
268 static void usbprog_runtest(int num_cycles)
272 /* only do a state_move when we're not already in IDLE */
273 if (tap_get_state() != TAP_IDLE)
275 usbprog_end_state(TAP_IDLE);
276 usbprog_state_move();
279 /* execute num_cycles */
282 usbprog_jtag_tms_send(usbprog_jtag_handle);
283 usbprog_write(0, 0, 0);
287 usbprog_jtag_tms_send(usbprog_jtag_handle);
288 /* LOG_INFO("NUM CYCLES %i",num_cycles); */
291 for (i = 0; i < num_cycles; i++)
293 usbprog_write(1, 0, 0);
294 usbprog_write(0, 0, 0);
297 #ifdef _DEBUG_JTAG_IO_
298 LOG_DEBUG("runtest: cur_state %s end_state %s", tap_state_name(tap_get_state()), tap_state_name(tap_get_end_state()));
301 /* finish in end_state */
303 usbprog_end_state(saved_end_state);
304 if (tap_get_state() != tap_get_end_state())
305 usbprog_state_move();
309 static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
311 tap_state_t saved_end_state = tap_get_end_state();
314 usbprog_end_state(TAP_IRSHIFT);
316 usbprog_end_state(TAP_DRSHIFT);
318 /* Only move if we're not already there */
319 if (tap_get_state() != tap_get_end_state())
320 usbprog_state_move();
322 usbprog_end_state(saved_end_state);
324 usbprog_jtag_tms_send(usbprog_jtag_handle);
326 void (*f)(struct usbprog_jtag *usbprog_jtag, char * buffer, int size);
328 case SCAN_OUT: f = &usbprog_jtag_write_tdi; break;
329 case SCAN_IN: f = &usbprog_jtag_read_tdo; break;
330 case SCAN_IO: f = &usbprog_jtag_write_and_read; break;
332 LOG_ERROR("unknown scan type: %i", type);
335 f(usbprog_jtag_handle, (char *)buffer, scan_size);
337 /* The adapter does the transition to PAUSE internally */
339 tap_set_state(TAP_IRPAUSE);
341 tap_set_state(TAP_DRPAUSE);
343 if (tap_get_state() != tap_get_end_state())
344 usbprog_state_move();
347 /*************** jtag wrapper functions *********************/
349 static void usbprog_write(int tck, int tms, int tdi)
351 unsigned char output_value = 0x00;
354 output_value |= (1 << TMS_BIT);
356 output_value |= (1 << TDI_BIT);
358 output_value |= (1 << TCK_BIT);
360 usbprog_jtag_write_slice(usbprog_jtag_handle,output_value);
363 /* (1) assert or (0) deassert reset lines */
364 static void usbprog_reset(int trst, int srst)
366 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
369 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
371 usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
374 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
376 usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
379 /*************** jtag lowlevel functions ********************/
381 struct usb_bus *busses;
383 struct usbprog_jtag* usbprog_jtag_open(void)
388 const uint16_t vids[] = { VID, 0 };
389 const uint16_t pids[] = { PID, 0 };
390 struct usb_dev_handle *dev;
391 if (jtag_usb_open(vids, pids, &dev) != ERROR_OK)
394 struct usbprog_jtag *tmp = malloc(sizeof(struct usbprog_jtag));
395 tmp->usb_handle = dev;
397 usb_set_configuration(dev, 1);
398 usb_claim_interface(dev, 0);
399 usb_set_altinterface(dev, 0);
405 static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
407 usb_close(usbprog_jtag->usb_handle);
412 static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
414 int res = usb_bulk_write(usbprog_jtag->usb_handle, 3, msg,msglen, 100);
415 if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) || \
416 (msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
420 /* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
421 res = usb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100);
423 return (unsigned char)msg[1];
432 static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
434 usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
437 static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
439 char tmp[64]; /* fastes packet size for usb controller */
440 int send_bits, bufindex = 0, fillindex = 0, i, loops;
443 /* 61 byte can be transfered (488 bit) */
460 tmp[0] = WRITE_AND_READ;
461 tmp[1] = (char)(send_bits >> 8); /* high */
462 tmp[2] = (char)(send_bits); /* low */
465 for (i = 0; i < loops; i++)
467 tmp[3 + i] = buffer[bufindex];
471 if (usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000) == 64)
473 /* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
476 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000) < 1)
483 for (i = 0; i < loops; i++)
486 buffer[fillindex++] = swap;
492 static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
494 char tmp[64]; /* fastes packet size for usb controller */
495 int send_bits, fillindex = 0, i, loops;
498 /* 61 byte can be transfered (488 bit) */
515 tmp[0] = WRITE_AND_READ;
516 tmp[1] = (char)(send_bits >> 8); /* high */
517 tmp[2] = (char)(send_bits); /* low */
519 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000);
521 /* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
524 while (usb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10) < 1)
531 for (i = 0; i < loops; i++)
534 buffer[fillindex++] = swap;
539 static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char * buffer, int size)
541 char tmp[64]; /* fastes packet size for usb controller */
542 int send_bits, bufindex = 0, i, loops;
544 /* 61 byte can be transfered (488 bit) */
557 /* if (loops == 0) */
562 tmp[1] = (char)(send_bits >> 8); /* high */
563 tmp[2] = (char)(send_bits); /* low */
566 for (i = 0; i < loops; i++)
568 tmp[3 + i] = buffer[bufindex];
571 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000);
575 static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
577 usbprog_jtag_tms_collect(tms_scan);
580 static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
583 tmp[0] = PORT_DIRECTION;
584 tmp[1] = (char)direction;
585 usbprog_jtag_message(usbprog_jtag, tmp, 2);
588 static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag,unsigned char value)
592 tmp[1] = (char)value;
593 usbprog_jtag_message(usbprog_jtag, tmp, 2);
597 static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
602 return usbprog_jtag_message(usbprog_jtag, tmp, 2);
606 static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag,int bit, int value)
609 tmp[0] = PORT_SETBIT;
615 usbprog_jtag_message(usbprog_jtag, tmp, 3);
619 static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
622 tmp[0] = PORT_GETBIT;
625 if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
632 static void usbprog_jtag_tms_collect(char tms_scan)
634 tms_chain[tms_chain_index] = tms_scan;
638 static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
641 /* LOG_INFO("TMS SEND"); */
642 if (tms_chain_index > 0)
644 char tmp[tms_chain_index + 2];
645 tmp[0] = WRITE_TMS_CHAIN;
646 tmp[1] = (char)(tms_chain_index);
647 for (i = 0; i < tms_chain_index + 1; i++)
648 tmp[2 + i] = tms_chain[i];
649 usb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000);
654 struct jtag_interface usbprog_interface = {
656 .execute_queue = &usbprog_execute_queue,
657 .speed = &usbprog_speed,
658 .init = &usbprog_init,
659 .quit = &usbprog_quit