2 * Driver for USB-JTAG, Altera USB-Blaster and compatibles
4 * Inspired from original code from Kolja Waschk's USB-JTAG project
5 * (http://www.ixo.de/info/usb_jtag/), and from openocd project.
7 * Copyright (C) 2012 Robert Jarzmik robert.jarzmik@free.fr
8 * Copyright (C) 2011 Ali Lown ali@lown.me.uk
9 * Copyright (C) 2009 Catalin Patulea cat@vv.carleton.ca
10 * Copyright (C) 2006 Kolja Waschk usbjtag@ixo.de
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
25 * The following information is originally from Kolja Waschk's USB-JTAG,
26 * where it was obtained by reverse engineering an Altera USB-Blaster.
27 * See http://www.ixo.de/info/usb_jtag/ for USB-Blaster block diagram and
28 * usb_jtag-20080705-1200.zip#usb_jtag/host/openocd for protocol.
30 * The same information is also on the UrJTAG mediawiki, with some additional
31 * notes on bits marked as "unknown" by usb_jtag.
32 * (http://sourceforge.net/apps/mediawiki/urjtag/index.php?
33 * title=Cable_Altera_USB-Blaster)
35 * USB-JTAG, Altera USB-Blaster and compatibles are typically implemented as
36 * an FTDIChip FT245 followed by a CPLD which handles a two-mode protocol:
42 * __|__________ _________
44 * USB__| FTDI 245BM |__| EPM7064 |__JTAG (B_TDO,B_TDI,B_TMS,B_TCK)
45 * |_____________| |_________|
46 * __|__________ _|___________
48 * | 6 MHz XTAL | | 24 MHz Osc. |
49 * |_____________| |_____________|
62 /* project specific includes */
63 #include <jtag/interface.h>
64 #include <jtag/commands.h>
65 #include <helper/time_support.h>
66 #include "ublast_access.h"
75 /* Size of USB endpoint max packet size, ie. 64 bytes */
76 #define MAX_PACKET_SIZE 64
78 * Size of data buffer that holds bytes in byte-shift mode.
79 * This buffer can hold multiple USB packets aligned to
80 * MAX_PACKET_SIZE bytes boundaries.
81 * BUF_LEN must be grater than or equal MAX_PACKET_SIZE.
94 struct ublast_lowlevel *drv;
95 char *ublast_device_desc;
96 uint16_t ublast_vid, ublast_pid;
100 * Global device control
102 static struct ublast_info info = {
103 .ublast_vid = 0x09fb, /* Altera */
104 .ublast_pid = 0x6001, /* USB-Blaster */
105 .lowlevel_name = NULL,
109 * Available lowlevel drivers (FTDI, FTD2xx, ...)
113 struct ublast_lowlevel *(*drv_register)(void);
116 static struct drvs_map lowlevel_drivers_map[] = {
117 #if BUILD_USB_BLASTER_LIBFTDI
118 { .name = "ftdi", .drv_register = ublast_register_ftdi },
120 #if BUILD_USB_BLASTER_FTD2XX
121 { .name = "ftd2xx", .drv_register = ublast_register_ftd2xx },
127 * Access functions to lowlevel driver, agnostic of libftdi/libftdxx
129 static char *hexdump(uint8_t *buf, unsigned int size)
132 char *str = calloc(size * 2 + 1, 1);
134 for (i = 0; i < size; i++)
135 sprintf(str + 2*i, "%02x", buf[i]);
139 static int ublast_buf_read(uint8_t *buf, unsigned size, uint32_t *bytes_read)
141 int ret = info.drv->read(info.drv, buf, size, bytes_read);
142 char *str = hexdump(buf, *bytes_read);
144 DEBUG_JTAG_IO("(size=%d, buf=[%s]) -> %u", size, str,
150 static int ublast_buf_write(uint8_t *buf, int size, uint32_t *bytes_written)
152 int ret = info.drv->write(info.drv, buf, size, bytes_written);
153 char *str = hexdump(buf, *bytes_written);
155 DEBUG_JTAG_IO("(size=%d, buf=[%s]) -> %u", size, str,
161 static int nb_buf_remaining(void)
163 return BUF_LEN - info.bufidx;
166 static void ublast_flush_buffer(void)
169 int nb = info.bufidx, ret = ERROR_OK;
171 while (ret == ERROR_OK && nb > 0) {
172 ret = ublast_buf_write(info.buf, nb, &retlen);
179 * Actually, the USB-Blaster offers a byte-shift mode to transmit up to 504 data
180 * bits (bidirectional) in a single USB packet. A header byte has to be sent as
181 * the first byte in a packet with the following meaning:
183 * Bit 7 (0x80): Must be set to indicate byte-shift mode.
184 * Bit 6 (0x40): If set, the USB-Blaster will also read data, not just write.
185 * Bit 5..0: Define the number N of following bytes
187 * All N following bytes will then be clocked out serially on TDI. If Bit 6 was
188 * set, it will afterwards return N bytes with TDO data read while clocking out
189 * the TDI data. LSB of the first byte after the header byte will appear first
193 /* Simple bit banging mode:
195 * Bit 7 (0x80): Must be zero (see byte-shift mode above)
196 * Bit 6 (0x40): If set, you will receive a byte indicating the state of TDO
198 * Bit 5 (0x20): Output Enable/LED.
199 * Bit 4 (0x10): TDI Output.
200 * Bit 3 (0x08): nCS Output (not used in JTAG mode).
201 * Bit 2 (0x04): nCE Output (not used in JTAG mode).
202 * Bit 1 (0x02): TMS Output.
203 * Bit 0 (0x01): TCK Output.
205 * For transmitting a single data bit, you need to write two bytes (one for
206 * setting up TDI/TMS/TCK=0, and one to trigger TCK high with same TDI/TMS
207 * held). Up to 64 bytes can be combined in a single USB packet.
208 * It isn't possible to read a data without transmitting data.
217 #define READ (1 << 6)
218 #define SHMODE (1 << 7)
219 #define READ_TDO (1 << 0)
222 * ublast_reset - reset the JTAG device is possible
223 * @trst: 1 if TRST is to be asserted
224 * @srst: 1 if SRST is to be asserted
226 * This is not implemented yet. If pin6 or pin8 controlls the TRST/SRST, code
227 * should be added so that this function makes use of it.
229 static void ublast_reset(int trst, int srst)
231 DEBUG_JTAG_IO("TODO: ublast_reset(%d,%d) isn't implemented!",
236 * ublast_queue_byte - queue one 'bitbang mode' byte for USB Blaster
237 * @abyte: the byte to queue
239 * Queues one byte in 'bitbang mode' to the USB Blaster. The byte is not
240 * actually sent, but stored in a buffer. The write is performed once
241 * the buffer is filled, or if an explicit ublast_flush_buffer() is called.
243 static void ublast_queue_byte(uint8_t abyte)
245 if (nb_buf_remaining() < 1)
246 ublast_flush_buffer();
247 info.buf[info.bufidx++] = abyte;
248 if (nb_buf_remaining() == 0)
249 ublast_flush_buffer();
250 DEBUG_JTAG_IO("(byte=0x%02x)", abyte);
254 * ublast_build_out - build bitbang mode output byte
255 * @type: says if reading back TDO is required
257 * Returns the compute bitbang mode byte
259 static uint8_t ublast_build_out(enum scan_type type)
263 abyte |= info.tms ? TMS : 0;
264 abyte |= info.pin6 ? NCE : 0;
265 abyte |= info.pin8 ? NCS : 0;
266 abyte |= info.tdi ? TDI : 0;
268 if (type == SCAN_IN || type == SCAN_IO)
274 * ublast_clock_tms - clock a TMS transition
275 * @tms: the TMS to be sent
277 * Triggers a TMS transition (ie. one JTAG TAP state move).
279 static void ublast_clock_tms(int tms)
283 DEBUG_JTAG_IO("(tms=%d)", !!tms);
286 out = ublast_build_out(SCAN_OUT);
287 ublast_queue_byte(out);
288 ublast_queue_byte(out | TCK);
292 * ublast_idle_clock - put back TCK to low level
294 * See ublast_queue_tdi() comment for the usage of this function.
296 static void ublast_idle_clock(void)
298 uint8_t out = ublast_build_out(SCAN_OUT);
301 ublast_queue_byte(out);
305 * ublast_clock_tdi - Output a TDI with bitbang mode
306 * @tdi: the TDI bit to be shifted out
307 * @type: scan type (ie. does a readback of TDO is required)
309 * Output a TDI bit and assert clock to push it into the JTAG device :
310 * - writing out TCK=0, TMS=<old_state>=0, TDI=<tdi>
311 * - writing out TCK=1, TMS=<new_state>, TDI=<tdi> which triggers the JTAG
312 * device aquiring the data.
314 * If a TDO is to be read back, the required read is requested (bitbang mode),
315 * and the USB Blaster will send back a byte with bit0 reprensenting the TDO.
317 static void ublast_clock_tdi(int tdi, enum scan_type type)
321 DEBUG_JTAG_IO("(tdi=%d)", !!tdi);
324 out = ublast_build_out(SCAN_OUT);
325 ublast_queue_byte(out);
327 out = ublast_build_out(type);
328 ublast_queue_byte(out | TCK);
332 * ublast_clock_tdi_flip_tms - Output a TDI with bitbang mode, change JTAG state
333 * @tdi: the TDI bit to be shifted out
334 * @type: scan type (ie. does a readback of TDO is required)
336 * This function is the same as ublast_clock_tdi(), but it changes also the TMS
337 * while outputing the TDI. This should be the last TDI output of a TDI
338 * sequence, which will change state from :
339 * - IRSHIFT -> IREXIT1
340 * - or DRSHIFT -> DREXIT1
342 static void ublast_clock_tdi_flip_tms(int tdi, enum scan_type type)
346 DEBUG_JTAG_IO("(tdi=%d)", !!tdi);
348 info.tms = !info.tms;
350 out = ublast_build_out(SCAN_OUT);
351 ublast_queue_byte(out);
353 out = ublast_build_out(type);
354 ublast_queue_byte(out | TCK);
356 out = ublast_build_out(SCAN_OUT);
357 ublast_queue_byte(out);
361 * ublast_queue_bytes - queue bytes for the USB Blaster
363 * @nb_bytes: number of bytes
365 * Queues bytes to be sent to the USB Blaster. The bytes are not
366 * actually sent, but stored in a buffer. The write is performed once
367 * the buffer is filled, or if an explicit ublast_flush_buffer() is called.
369 static void ublast_queue_bytes(uint8_t *bytes, int nb_bytes)
371 if (info.bufidx + nb_bytes > BUF_LEN) {
372 LOG_ERROR("buggy code, should never queue more that %d bytes",
373 info.bufidx + nb_bytes);
376 DEBUG_JTAG_IO("(nb_bytes=%d, bytes=[0x%02x, ...])", nb_bytes,
377 bytes ? bytes[0] : 0);
379 memcpy(&info.buf[info.bufidx], bytes, nb_bytes);
381 memset(&info.buf[info.bufidx], 0, nb_bytes);
382 info.bufidx += nb_bytes;
383 if (nb_buf_remaining() == 0)
384 ublast_flush_buffer();
388 * ublast_tms_seq - write a TMS sequence transition to JTAG
389 * @bits: TMS bits to be written (bit0, bit1 .. bitN)
390 * @nb_bits: number of TMS bits (between 1 and 8)
392 * Write a serie of TMS transitions, where each transition consists in :
393 * - writing out TCK=0, TMS=<new_state>, TDI=<???>
394 * - writing out TCK=1, TMS=<new_state>, TDI=<???> which triggers the transition
395 * The function ensures that at the end of the sequence, the clock (TCK) is put
398 static void ublast_tms_seq(const uint8_t *bits, int nb_bits)
402 DEBUG_JTAG_IO("(bits=%02x..., nb_bits=%d)", bits[0], nb_bits);
403 for (i = 0; i < nb_bits; i++)
404 ublast_clock_tms((bits[i / 8] >> (i % 8)) & 0x01);
409 * ublast_tms - write a tms command
412 static void ublast_tms(struct tms_command *cmd)
414 DEBUG_JTAG_IO("(num_bits=%d)", cmd->num_bits);
415 ublast_tms_seq(cmd->bits, cmd->num_bits);
419 * ublast_path_move - write a TMS sequence transition to JTAG
420 * @cmd: path transition
422 * Write a serie of TMS transitions, where each transition consists in :
423 * - writing out TCK=0, TMS=<new_state>, TDI=<???>
424 * - writing out TCK=1, TMS=<new_state>, TDI=<???> which triggers the transition
425 * The function ensures that at the end of the sequence, the clock (TCK) is put
428 static void ublast_path_move(struct pathmove_command *cmd)
432 DEBUG_JTAG_IO("(num_states=%d, last_state=%d)",
433 cmd->num_states, cmd->path[cmd->num_states - 1]);
434 for (i = 0; i < cmd->num_states; i++) {
435 if (tap_state_transition(tap_get_state(), false) == cmd->path[i])
437 if (tap_state_transition(tap_get_state(), true) == cmd->path[i])
439 tap_set_state(cmd->path[i]);
445 * ublast_state_move - move JTAG state to the target state
446 * @state: the target state
448 * Input the correct TMS sequence to the JTAG TAP so that we end up in the
449 * target state. This assumes the current state (tap_get_state()) is correct.
451 static void ublast_state_move(tap_state_t state)
456 DEBUG_JTAG_IO("(from %s to %s)", tap_state_name(tap_get_state()),
457 tap_state_name(state));
458 if (tap_get_state() == state)
460 tms_scan = tap_get_tms_path(tap_get_state(), state);
461 tms_len = tap_get_tms_path_len(tap_get_state(), state);
462 ublast_tms_seq(&tms_scan, tms_len);
463 tap_set_state(state);
467 * ublast_read_byteshifted_tdos - read TDO of byteshift writes
468 * @buf: the buffer to store the bits
469 * @nb_bits: the number of bits
471 * Reads back from USB Blaster TDO bits, triggered by a 'byteshift write', ie. eight
472 * bits per received byte from USB interface, and store them in buffer.
474 * As the USB blaster stores the TDO bits in LSB (ie. first bit in (byte0,
475 * bit0), second bit in (byte0, bit1), ...), which is what we want to return,
476 * simply read bytes from USB interface and store them.
478 * Returns ERROR_OK if OK, ERROR_xxx if a read error occured
480 static int ublast_read_byteshifted_tdos(uint8_t *buf, int nb_bytes)
485 DEBUG_JTAG_IO("%s(buf=%p, num_bits=%d)", __func__, buf, nb_bytes * 8);
486 ublast_flush_buffer();
487 while (ret == ERROR_OK && nb_bytes > 0) {
488 ret = ublast_buf_read(buf, nb_bytes, &retlen);
495 * ublast_read_bitbang_tdos - read TDO of bitbang writes
496 * @buf: the buffer to store the bits
497 * @nb_bits: the number of bits
499 * Reads back from USB Blaster TDO bits, triggered by a 'bitbang write', ie. one
500 * bit per received byte from USB interface, and store them in buffer, where :
501 * - first bit is stored in byte0, bit0 (LSB)
502 * - second bit is stored in byte0, bit 1
504 * - eight bit is sotred in byte0, bit 7
505 * - ninth bit is sotred in byte1, bit 0
508 * Returns ERROR_OK if OK, ERROR_xxx if a read error occured
510 static int ublast_read_bitbang_tdos(uint8_t *buf, int nb_bits)
513 int i, ret = ERROR_OK;
517 DEBUG_JTAG_IO("%s(buf=%p, num_bits=%d)", __func__, buf, nb_bits);
520 * Ensure all previous bitbang writes were issued to the dongle, so that
521 * it returns back the read values.
523 ublast_flush_buffer();
525 ret = ublast_buf_read(tmp, nb1, &retlen);
526 for (i = 0; ret == ERROR_OK && i < nb1; i++)
527 if (tmp[i] & READ_TDO)
535 * ublast_queue_tdi - short description
536 * @bits: bits to be queued on TDI (or NULL if 0 are to be queued)
537 * @nb_bits: number of bits
538 * @scan: scan type (ie. if TDO read back is required or not)
540 * Outputs a serie of TDI bits on TDI.
541 * As a side effect, the last TDI bit is sent along a TMS=1, and triggers a JTAG
542 * TAP state shift if input bits were non NULL.
544 * In order to not saturate the USB Blaster queues, this method reads back TDO
545 * if the scan type requests it, and stores them back in bits.
547 * As a side note, the state of TCK when entering this function *must* be
548 * low. This is because byteshift mode outputs TDI on rising TCK and reads TDO
549 * on falling TCK if and only if TCK is low before queuing byteshift mode bytes.
550 * If TCK was high, the USB blaster will queue TDI on falling edge, and read TDO
553 static void ublast_queue_tdi(uint8_t *bits, int nb_bits, enum scan_type scan)
555 int nb8 = nb_bits / 8;
556 int nb1 = nb_bits % 8;
557 int nbfree_in_packet, i, trans = 0, read_tdos;
558 uint8_t *tdos = calloc(1, nb_bits / 8 + 1);
559 static uint8_t byte0[BUF_LEN];
562 * As the last TDI bit should always be output in bitbang mode in order
563 * to activate the TMS=1 transition to EXIT_?R state. Therefore a
564 * situation where nb_bits is a multiple of 8 is handled as follows:
565 * - the number of TDI shifted out in "byteshift mode" is 8 less than
568 * This ensures that nb1 is never 0, and allows the TMS transition.
570 if (nb8 > 0 && nb1 == 0) {
575 read_tdos = (scan == SCAN_IN || scan == SCAN_IO);
576 for (i = 0; i < nb8; i += trans) {
578 * Calculate number of bytes to fill USB packet of size MAX_PACKET_SIZE
580 nbfree_in_packet = (MAX_PACKET_SIZE - (info.bufidx%MAX_PACKET_SIZE));
581 trans = MIN(nbfree_in_packet - 1, nb8 - i);
584 * Queue a byte-shift mode transmission, with as many bytes as
585 * is possible with regard to :
586 * - current filling level of write buffer
587 * - remaining bytes to write in byte-shift mode
590 ublast_queue_byte(SHMODE | READ | trans);
592 ublast_queue_byte(SHMODE | trans);
594 ublast_queue_bytes(&bits[i], trans);
596 ublast_queue_bytes(byte0, trans);
598 ublast_read_byteshifted_tdos(&tdos[i], trans);
602 * Queue the remaining TDI bits in bitbang mode.
604 for (i = 0; i < nb1; i++) {
605 int tdi = bits ? bits[nb8 + i / 8] & (1 << i) : 0;
606 if (bits && i == nb1 - 1)
607 ublast_clock_tdi_flip_tms(tdi, scan);
609 ublast_clock_tdi(tdi, scan);
611 if (nb1 && read_tdos)
612 ublast_read_bitbang_tdos(&tdos[nb8], nb1);
615 memcpy(bits, tdos, DIV_ROUND_UP(nb_bits, 8));
619 * Ensure clock is in lower state
624 static void ublast_runtest(int cycles, tap_state_t state)
626 DEBUG_JTAG_IO("%s(cycles=%i, end_state=%d)", __func__, cycles, state);
628 ublast_state_move(TAP_IDLE);
629 ublast_queue_tdi(NULL, cycles, SCAN_OUT);
630 ublast_state_move(state);
633 static void ublast_stableclocks(int cycles)
635 DEBUG_JTAG_IO("%s(cycles=%i)", __func__, cycles);
636 ublast_queue_tdi(NULL, cycles, SCAN_OUT);
640 * ublast_scan - launches a DR-scan or IR-scan
641 * @cmd: the command to launch
643 * Launch a JTAG IR-scan or DR-scan
645 * Returns ERROR_OK if OK, ERROR_xxx if a read/write error occured.
647 static int ublast_scan(struct scan_command *cmd)
653 static const char * const type2str[] = { "", "SCAN_IN", "SCAN_OUT", "SCAN_IO" };
654 char *log_buf = NULL;
656 type = jtag_scan_type(cmd);
657 scan_bits = jtag_build_buffer(cmd, &buf);
660 ublast_state_move(TAP_IRSHIFT);
662 ublast_state_move(TAP_DRSHIFT);
664 log_buf = hexdump(buf, DIV_ROUND_UP(scan_bits, 8));
665 DEBUG_JTAG_IO("%s(scan=%s, type=%s, bits=%d, buf=[%s], end_state=%d)", __func__,
666 cmd->ir_scan ? "IRSCAN" : "DRSCAN",
668 scan_bits, log_buf, cmd->end_state);
671 ublast_queue_tdi(buf, scan_bits, type);
674 * As our JTAG is in an unstable state (IREXIT1 or DREXIT1), move it
675 * forward to a stable IRPAUSE or DRPAUSE.
679 tap_set_state(TAP_IRPAUSE);
681 tap_set_state(TAP_DRPAUSE);
683 ret = jtag_read_buffer(buf, cmd);
686 ublast_state_move(cmd->end_state);
690 static void ublast_msleep(int ms)
692 DEBUG_JTAG_IO("%s(ms=%d)", __func__, ms);
696 static int ublast_execute_queue(void)
698 struct jtag_command *cmd;
701 for (cmd = jtag_command_queue; ret == ERROR_OK && cmd != NULL;
705 ublast_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
708 ublast_runtest(cmd->cmd.runtest->num_cycles,
709 cmd->cmd.runtest->end_state);
711 case JTAG_STABLECLOCKS:
712 ublast_stableclocks(cmd->cmd.stableclocks->num_cycles);
715 ublast_state_move(cmd->cmd.statemove->end_state);
718 ublast_path_move(cmd->cmd.pathmove);
721 ublast_tms(cmd->cmd.tms);
724 ublast_msleep(cmd->cmd.sleep->us);
727 ret = ublast_scan(cmd->cmd.scan);
732 ublast_flush_buffer();
737 * ublast_init - Initialize the Altera device
739 * Initialize the device :
740 * - open the USB device
741 * - empty the write FIFO (128 bytes)
742 * - empty the read FIFO (384 bytes)
744 * Returns ERROR_OK if USB device found, error if not.
746 static int ublast_init(void)
748 static uint8_t tms_reset = 0xff;
751 if (info.lowlevel_name) {
752 for (i = 0; lowlevel_drivers_map[i].name; i++)
753 if (!strcmp(lowlevel_drivers_map[i].name, info.lowlevel_name))
755 if (lowlevel_drivers_map[i].name)
756 info.drv = lowlevel_drivers_map[i].drv_register();
758 LOG_ERROR("no lowlevel driver found for %s or lowlevel driver opening error",
760 return ERROR_JTAG_DEVICE_ERROR;
763 LOG_INFO("No lowlevel driver configured, will try them all");
764 for (i = 0; !info.drv && lowlevel_drivers_map[i].name; i++)
765 info.drv = lowlevel_drivers_map[i].drv_register();
767 LOG_ERROR("no lowlevel driver found");
768 return ERROR_JTAG_DEVICE_ERROR;
773 * Register the lowlevel driver
775 info.drv->ublast_vid = info.ublast_vid;
776 info.drv->ublast_pid = info.ublast_pid;
777 info.drv->ublast_device_desc = info.ublast_device_desc;
779 ret = info.drv->open(info.drv);
780 if (ret == ERROR_OK) {
782 * Flush USB-Blaster queue fifos
785 ublast_buf_write(info.buf, BUF_LEN, &retlen);
787 * Put JTAG in RESET state (five 1 on TMS)
789 ublast_tms_seq(&tms_reset, 5);
790 tap_set_state(TAP_RESET);
796 * ublast_quit - Release the Altera device
798 * Releases the device :
799 * - put the device pins in 'high impedance' mode
800 * - close the USB device
802 * Returns always ERROR_OK
804 static int ublast_quit(void)
809 ublast_buf_write(&byte0, 1, &retlen);
810 return info.drv->close(info.drv);
813 COMMAND_HANDLER(ublast_handle_device_desc_command)
816 info.ublast_device_desc = strdup(CMD_ARGV[0]);
818 LOG_ERROR("require exactly one argument to "
819 "ublast_device_desc <description>");
824 COMMAND_HANDLER(ublast_handle_vid_pid_command)
827 LOG_WARNING("ignoring extra IDs in ublast_vid_pid "
828 "(maximum is 1 pair)");
832 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], info.ublast_vid);
833 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], info.ublast_pid);
835 LOG_WARNING("incomplete ublast_vid_pid configuration");
841 COMMAND_HANDLER(ublast_handle_pin_command)
846 const char * const pin_name = CMD_ARGV[0];
849 COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], state);
850 if ((state != 0) && (state != 1)) {
851 LOG_ERROR("%s: pin state must be 0 or 1", CMD_NAME);
852 return ERROR_COMMAND_SYNTAX_ERROR;
855 if (!strcmp(pin_name, "pin6")) {
857 } else if (!strcmp(pin_name, "pin8")) {
860 LOG_ERROR("%s: pin name must be \"pin6\" or \"pin8\"",
862 return ERROR_COMMAND_SYNTAX_ERROR;
866 out_value = ublast_build_out(SCAN_OUT);
867 ublast_queue_byte(out_value);
868 ublast_flush_buffer();
872 LOG_ERROR("%s takes exactly two arguments", CMD_NAME);
873 return ERROR_COMMAND_SYNTAX_ERROR;
877 COMMAND_HANDLER(ublast_handle_lowlevel_drv_command)
880 info.lowlevel_name = strdup(CMD_ARGV[0]);
882 LOG_ERROR("require exactly one argument to "
883 "usb_blaster_lowlevel_driver (ftdi|ftd2xx)");
887 static const struct command_registration ublast_command_handlers[] = {
889 .name = "usb_blaster_device_desc",
890 .handler = ublast_handle_device_desc_command,
891 .mode = COMMAND_CONFIG,
892 .help = "set the USB device description of the USB-Blaster",
893 .usage = "description-string",
896 .name = "usb_blaster_vid_pid",
897 .handler = ublast_handle_vid_pid_command,
898 .mode = COMMAND_CONFIG,
899 .help = "the vendor ID and product ID of the USB-Blaster",
903 .name = "usb_blaster_lowlevel_driver",
904 .handler = ublast_handle_lowlevel_drv_command,
905 .mode = COMMAND_CONFIG,
906 .help = "set the lowlevel access for the USB Blaster (ftdi, ftd2xx)",
907 .usage = "(ftdi|ftd2xx)",
910 .name = "usb_blaster",
911 .handler = ublast_handle_pin_command,
913 .help = "set pin state for the unused GPIO pins",
914 .usage = "(pin6|pin8) (0|1)",
916 COMMAND_REGISTRATION_DONE
919 struct jtag_interface usb_blaster_interface = {
920 .name = "usb_blaster",
921 .commands = ublast_command_handlers,
922 .supported = DEBUG_CAP_TMS_SEQ,
924 .execute_queue = ublast_execute_queue,