1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 /*******************************************************************************
4 * Driver for OpenJTAG Project (www.openjtag.org) *
5 * Compatible with libftdi drivers. *
7 * Cypress CY7C65215 support *
8 * Copyright (C) 2015 Vianney le Clément de Saint-Marcq, Essensium NV *
9 * <vianney.leclement@essensium.com> *
11 * Copyright (C) 2010 by Ivan Meleca <mileca@gmail.com> *
13 * Copyright (C) 2013 by Ryan Corbin, GlueLogix Inc. <corbin.ryan@gmail.com> *
14 * Updated to work with OpenOCD v0.7.0. Fixed libftdi read speed issue. *
16 * Based on usb_blaster.c *
17 * Copyright (C) 2009 Catalin Patulea *
18 * Copyright (C) 2006 Kolja Waschk *
21 * Copyright (C) 2008 by Spencer Oliver *
22 * spen@spen-soft.co.uk *
23 ***************************************************************************/
25 /***************************************************************************
26 * Version 1.0 Tested on a MCBSTM32 board using a Cortex-M3 (stm32f103x), *
27 * GDB and Eclipse under Linux (Ubuntu 10.04) *
29 ***************************************************************************/
35 #include <jtag/interface.h>
36 #include <jtag/commands.h>
37 #include "libusb_helper.h"
40 OPENJTAG_VARIANT_STANDARD,
41 OPENJTAG_VARIANT_CY7C65215,
42 } openjtag_variant = OPENJTAG_VARIANT_STANDARD;
44 static const char * const openjtag_variant_names[] = {
51 * OpenJTAG-OpenOCD state conversion
53 typedef enum openjtag_tap_state {
54 OPENJTAG_TAP_INVALID = -1,
55 OPENJTAG_TAP_RESET = 0,
56 OPENJTAG_TAP_IDLE = 1,
57 OPENJTAG_TAP_SELECT_DR = 2,
58 OPENJTAG_TAP_CAPTURE_DR = 3,
59 OPENJTAG_TAP_SHIFT_DR = 4,
60 OPENJTAG_TAP_EXIT1_DR = 5,
61 OPENJTAG_TAP_PAUSE_DR = 6,
62 OPENJTAG_TAP_EXIT2_DR = 7,
63 OPENJTAG_TAP_UPDATE_DR = 8,
64 OPENJTAG_TAP_SELECT_IR = 9,
65 OPENJTAG_TAP_CAPURE_IR = 10,
66 OPENJTAG_TAP_SHIFT_IR = 11,
67 OPENJTAG_TAP_EXIT1_IR = 12,
68 OPENJTAG_TAP_PAUSE_IR = 13,
69 OPENJTAG_TAP_EXIT2_IR = 14,
70 OPENJTAG_TAP_UPDATE_IR = 15,
71 } openjtag_tap_state_t;
73 /* OPENJTAG access library includes */
74 #include "libftdi_helper.h"
76 /* OpenJTAG vid/pid */
77 static uint16_t openjtag_vid = 0x0403;
78 static uint16_t openjtag_pid = 0x6001;
80 static char *openjtag_device_desc;
82 static struct ftdi_context ftdic;
84 #define OPENJTAG_BUFFER_SIZE 504
85 #define OPENJTAG_MAX_PENDING_RESULTS 256
87 struct openjtag_scan_result {
88 uint32_t bits; /* Length in bits*/
89 struct scan_command *command; /* Corresponding scan command */
93 /* USB RX/TX buffers */
94 static int usb_tx_buf_offs;
95 static uint8_t usb_tx_buf[OPENJTAG_BUFFER_SIZE];
96 static uint32_t usb_rx_buf_len;
97 static uint8_t usb_rx_buf[OPENJTAG_BUFFER_SIZE];
99 /* Pending readings */
100 static struct openjtag_scan_result openjtag_scan_result_buffer[OPENJTAG_MAX_PENDING_RESULTS];
101 static int openjtag_scan_result_count;
103 static struct libusb_device_handle *usbh;
105 /* CY7C65215 model only */
106 #define CY7C65215_JTAG_REQUEST 0x40 /* bmRequestType: vendor host-to-device */
107 #define CY7C65215_JTAG_ENABLE 0xD0 /* bRequest: enable JTAG */
108 #define CY7C65215_JTAG_DISABLE 0xD1 /* bRequest: disable JTAG */
109 #define CY7C65215_JTAG_READ 0xD2 /* bRequest: read buffer */
110 #define CY7C65215_JTAG_WRITE 0xD3 /* bRequest: write buffer */
112 #define CY7C65215_USB_TIMEOUT 100
114 static const uint16_t cy7c65215_vids[] = {0x04b4, 0};
115 static const uint16_t cy7c65215_pids[] = {0x0007, 0};
117 #define CY7C65215_JTAG_CLASS 0xff
118 #define CY7C65215_JTAG_SUBCLASS 0x04
120 static unsigned int ep_in, ep_out;
122 #ifdef _DEBUG_USB_COMMS_
124 #define DEBUG_TYPE_READ 0
125 #define DEBUG_TYPE_WRITE 1
126 #define DEBUG_TYPE_OCD_READ 2
127 #define DEBUG_TYPE_BUFFER 3
130 static void openjtag_debug_buffer(uint8_t *buffer, int length, uint8_t type)
138 case DEBUG_TYPE_READ:
139 sprintf(line, "USB READ %d bytes", length);
141 case DEBUG_TYPE_WRITE:
142 sprintf(line, "USB WRITE %d bytes", length);
144 case DEBUG_TYPE_OCD_READ:
145 sprintf(line, "TO OpenOCD %d bytes", length);
147 case DEBUG_TYPE_BUFFER:
148 sprintf(line, "Buffer %d bytes", length);
152 LOG_DEBUG("%s", line);
154 for (i = 0; i < length; i += LINE_LEN) {
156 case DEBUG_TYPE_READ:
157 sprintf(line, "USB READ: %04x", i);
159 case DEBUG_TYPE_WRITE:
160 sprintf(line, "USB WRITE: %04x", i);
162 case DEBUG_TYPE_OCD_READ:
163 sprintf(line, "TO OpenOCD: %04x", i);
165 case DEBUG_TYPE_BUFFER:
166 sprintf(line, "BUFFER: %04x", i);
170 for (j = i; j < i + LINE_LEN && j < length; j++) {
171 sprintf(s, " %02x", buffer[j]);
174 LOG_DEBUG("%s", line);
181 static int8_t openjtag_get_tap_state(int8_t state)
185 case TAP_DREXIT2: return OPENJTAG_TAP_EXIT2_DR;
186 case TAP_DREXIT1: return OPENJTAG_TAP_EXIT1_DR;
187 case TAP_DRSHIFT: return OPENJTAG_TAP_SHIFT_DR;
188 case TAP_DRPAUSE: return OPENJTAG_TAP_PAUSE_DR;
189 case TAP_IRSELECT: return OPENJTAG_TAP_SELECT_IR;
190 case TAP_DRUPDATE: return OPENJTAG_TAP_UPDATE_DR;
191 case TAP_DRCAPTURE: return OPENJTAG_TAP_CAPTURE_DR;
192 case TAP_DRSELECT: return OPENJTAG_TAP_SELECT_DR;
193 case TAP_IREXIT2: return OPENJTAG_TAP_EXIT2_IR;
194 case TAP_IREXIT1: return OPENJTAG_TAP_EXIT1_IR;
195 case TAP_IRSHIFT: return OPENJTAG_TAP_SHIFT_IR;
196 case TAP_IRPAUSE: return OPENJTAG_TAP_PAUSE_IR;
197 case TAP_IDLE: return OPENJTAG_TAP_IDLE;
198 case TAP_IRUPDATE: return OPENJTAG_TAP_UPDATE_IR;
199 case TAP_IRCAPTURE: return OPENJTAG_TAP_CAPURE_IR;
200 case TAP_RESET: return OPENJTAG_TAP_RESET;
202 default: return OPENJTAG_TAP_INVALID;
206 static int openjtag_buf_write_standard(
207 uint8_t *buf, int size, uint32_t *bytes_written)
210 #ifdef _DEBUG_USB_COMMS_
211 openjtag_debug_buffer(buf, size, DEBUG_TYPE_WRITE);
214 retval = ftdi_write_data(&ftdic, buf, size);
217 LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&ftdic));
218 return ERROR_JTAG_DEVICE_ERROR;
221 *bytes_written = retval;
226 static int openjtag_buf_write_cy7c65215(
227 uint8_t *buf, int size, uint32_t *bytes_written)
231 #ifdef _DEBUG_USB_COMMS_
232 openjtag_debug_buffer(buf, size, DEBUG_TYPE_WRITE);
240 ret = jtag_libusb_control_transfer(usbh, CY7C65215_JTAG_REQUEST,
241 CY7C65215_JTAG_WRITE, size, 0,
242 NULL, 0, CY7C65215_USB_TIMEOUT);
244 LOG_ERROR("vendor command failed, error %d", ret);
245 return ERROR_JTAG_DEVICE_ERROR;
248 if (jtag_libusb_bulk_write(usbh, ep_out, (char *)buf, size,
249 CY7C65215_USB_TIMEOUT, &ret)) {
250 LOG_ERROR("bulk write failed, error");
251 return ERROR_JTAG_DEVICE_ERROR;
253 *bytes_written = ret;
258 static int openjtag_buf_write(
259 uint8_t *buf, int size, uint32_t *bytes_written)
261 switch (openjtag_variant) {
262 case OPENJTAG_VARIANT_CY7C65215:
263 return openjtag_buf_write_cy7c65215(buf, size, bytes_written);
265 return openjtag_buf_write_standard(buf, size, bytes_written);
269 static int openjtag_buf_read_standard(
270 uint8_t *buf, uint32_t qty, uint32_t *bytes_read)
278 while ((*bytes_read < qty) && timeout--) {
279 retval = ftdi_read_data(&ftdic, buf + *bytes_read,
283 LOG_DEBUG_IO("ftdi_read_data: %s",
284 ftdi_get_error_string(&ftdic));
285 return ERROR_JTAG_DEVICE_ERROR;
287 *bytes_read += retval;
290 #ifdef _DEBUG_USB_COMMS_
291 openjtag_debug_buffer(buf, *bytes_read, DEBUG_TYPE_READ);
297 static int openjtag_buf_read_cy7c65215(
298 uint8_t *buf, uint32_t qty, uint32_t *bytes_read)
307 ret = jtag_libusb_control_transfer(usbh, CY7C65215_JTAG_REQUEST,
308 CY7C65215_JTAG_READ, qty, 0,
309 NULL, 0, CY7C65215_USB_TIMEOUT);
311 LOG_ERROR("vendor command failed, error %d", ret);
312 return ERROR_JTAG_DEVICE_ERROR;
315 if (jtag_libusb_bulk_read(usbh, ep_in, (char *)buf, qty,
316 CY7C65215_USB_TIMEOUT, &ret)) {
317 LOG_ERROR("bulk read failed, error");
318 return ERROR_JTAG_DEVICE_ERROR;
323 #ifdef _DEBUG_USB_COMMS_
324 openjtag_debug_buffer(buf, *bytes_read, DEBUG_TYPE_READ);
330 static int openjtag_buf_read(uint8_t *buf, uint32_t qty, uint32_t *bytes_read)
332 switch (openjtag_variant) {
333 case OPENJTAG_VARIANT_CY7C65215:
334 return openjtag_buf_read_cy7c65215(buf, qty, bytes_read);
336 return openjtag_buf_read_standard(buf, qty, bytes_read);
340 static int openjtag_sendcommand(uint8_t cmd)
343 return openjtag_buf_write(&cmd, 1, &written);
346 static int openjtag_speed(int speed)
376 LOG_WARNING("adapter speed not recognized, reverting to 375 kHz");
379 openjtag_sendcommand(clockcmd);
384 static int openjtag_init_standard(void)
386 uint8_t latency_timer;
388 /* Open by device description */
389 if (!openjtag_device_desc) {
390 LOG_WARNING("no openjtag device description specified, "
391 "using default 'Open JTAG Project'");
392 openjtag_device_desc = "Open JTAG Project";
395 if (ftdi_init(&ftdic) < 0)
396 return ERROR_JTAG_INIT_FAILED;
398 /* context, vendor id, product id, description, serial id */
399 if (ftdi_usb_open_desc(&ftdic, openjtag_vid, openjtag_pid, openjtag_device_desc, NULL) < 0) {
400 LOG_ERROR("unable to open ftdi device: %s", ftdic.error_str);
401 return ERROR_JTAG_INIT_FAILED;
404 if (ftdi_usb_reset(&ftdic) < 0) {
405 LOG_ERROR("unable to reset ftdi device");
406 return ERROR_JTAG_INIT_FAILED;
409 if (ftdi_set_latency_timer(&ftdic, 2) < 0) {
410 LOG_ERROR("unable to set latency timer");
411 return ERROR_JTAG_INIT_FAILED;
414 if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0) {
415 LOG_ERROR("unable to get latency timer");
416 return ERROR_JTAG_INIT_FAILED;
418 LOG_DEBUG("current latency timer: %u", latency_timer);
420 ftdi_disable_bitbang(&ftdic);
421 /* was (3000000 / 4) with a comment about a bug in libftdi when using high baudrate */
422 if (ftdi_set_baudrate(&ftdic, 3000000) < 0) {
423 LOG_ERROR("Can't set baud rate to max: %s",
424 ftdi_get_error_string(&ftdic));
425 return ERROR_JTAG_DEVICE_ERROR;
428 if (ftdi_tcioflush(&ftdic) < 0) {
429 LOG_ERROR("ftdi flush: %s", ftdic.error_str);
430 return ERROR_JTAG_INIT_FAILED;
436 static int openjtag_init_cy7c65215(void)
441 ret = jtag_libusb_open(cy7c65215_vids, cy7c65215_pids, &usbh, NULL);
442 if (ret != ERROR_OK) {
443 LOG_ERROR("unable to open cy7c65215 device");
447 ret = jtag_libusb_choose_interface(usbh, &ep_in, &ep_out,
448 CY7C65215_JTAG_CLASS,
449 CY7C65215_JTAG_SUBCLASS, -1, LIBUSB_TRANSFER_TYPE_BULK);
450 if (ret != ERROR_OK) {
451 LOG_ERROR("unable to claim JTAG interface");
455 ret = jtag_libusb_control_transfer(usbh,
456 CY7C65215_JTAG_REQUEST,
457 CY7C65215_JTAG_ENABLE,
458 0, 0, NULL, 0, CY7C65215_USB_TIMEOUT);
460 LOG_ERROR("could not enable JTAG module");
468 jtag_libusb_close(usbh);
469 return ERROR_JTAG_INIT_FAILED;
472 static int openjtag_init(void)
478 openjtag_scan_result_count = 0;
480 switch (openjtag_variant) {
481 case OPENJTAG_VARIANT_CY7C65215:
482 ret = openjtag_init_cy7c65215();
485 ret = openjtag_init_standard();
490 openjtag_speed(375); /* Start at slowest adapter speed */
491 openjtag_sendcommand(0x75); /* MSB */
496 static int openjtag_quit_standard(void)
498 ftdi_usb_close(&ftdic);
504 static int openjtag_quit_cy7c65215(void)
508 ret = jtag_libusb_control_transfer(usbh,
509 CY7C65215_JTAG_REQUEST,
510 CY7C65215_JTAG_DISABLE,
511 0, 0, NULL, 0, CY7C65215_USB_TIMEOUT);
513 LOG_WARNING("could not disable JTAG module");
515 jtag_libusb_close(usbh);
520 static int openjtag_quit(void)
522 switch (openjtag_variant) {
523 case OPENJTAG_VARIANT_CY7C65215:
524 return openjtag_quit_cy7c65215();
526 return openjtag_quit_standard();
530 static void openjtag_write_tap_buffer(void)
534 openjtag_buf_write(usb_tx_buf, usb_tx_buf_offs, &written);
535 openjtag_buf_read(usb_rx_buf, usb_tx_buf_offs, &usb_rx_buf_len);
540 static int openjtag_execute_tap_queue(void)
542 openjtag_write_tap_buffer();
546 if (openjtag_scan_result_count && usb_rx_buf_len) {
552 /* for every pending result */
553 while (res_count < openjtag_scan_result_count) {
556 len = openjtag_scan_result_buffer[res_count].bits;
560 uint8_t *buffer = openjtag_scan_result_buffer[res_count].buffer;
563 if (len <= 8 && openjtag_variant != OPENJTAG_VARIANT_CY7C65215) {
564 LOG_DEBUG_IO("bits < 8 buf = 0x%X, will be 0x%X",
565 usb_rx_buf[rx_offs], usb_rx_buf[rx_offs] >> (8 - len));
566 buffer[count] = usb_rx_buf[rx_offs] >> (8 - len);
569 buffer[count] = usb_rx_buf[rx_offs];
577 #ifdef _DEBUG_USB_COMMS_
578 openjtag_debug_buffer(buffer,
579 DIV_ROUND_UP(openjtag_scan_result_buffer[res_count].bits, 8), DEBUG_TYPE_OCD_READ);
581 jtag_read_buffer(buffer, openjtag_scan_result_buffer[res_count].command);
583 free(openjtag_scan_result_buffer[res_count].buffer);
589 openjtag_scan_result_count = 0;
594 static void openjtag_add_byte(char buf)
597 if (usb_tx_buf_offs == OPENJTAG_BUFFER_SIZE) {
598 LOG_DEBUG_IO("Forcing execute_tap_queue");
599 LOG_DEBUG_IO("TX Buff offs=%d", usb_tx_buf_offs);
600 openjtag_execute_tap_queue();
603 usb_tx_buf[usb_tx_buf_offs] = buf;
607 static void openjtag_add_scan(uint8_t *buffer, int length, struct scan_command *scan_cmd)
610 /* Ensure space to send long chains */
611 /* We add two byte for each eight (or less) bits, one for command, one for data */
612 if (usb_tx_buf_offs + (DIV_ROUND_UP(length, 8) * 2) >= OPENJTAG_BUFFER_SIZE) {
613 LOG_DEBUG_IO("Forcing execute_tap_queue from scan");
614 LOG_DEBUG_IO("TX Buff offs=%d len=%d", usb_tx_buf_offs, DIV_ROUND_UP(length, 8) * 2);
615 openjtag_execute_tap_queue();
618 openjtag_scan_result_buffer[openjtag_scan_result_count].bits = length;
619 openjtag_scan_result_buffer[openjtag_scan_result_count].command = scan_cmd;
620 openjtag_scan_result_buffer[openjtag_scan_result_count].buffer = buffer;
635 /* bits to transfer */
637 command |= bits << 5;
642 /* bits to transfer */
647 openjtag_add_byte(command);
648 openjtag_add_byte(buffer[count]);
652 openjtag_scan_result_count++;
655 static void openjtag_execute_reset(struct jtag_command *cmd)
658 LOG_DEBUG_IO("reset trst: %i srst %i",
659 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
663 if (cmd->cmd.reset->trst) {
670 openjtag_add_byte(buf);
673 static void openjtag_execute_sleep(struct jtag_command *cmd)
675 jtag_sleep(cmd->cmd.sleep->us);
678 static void openjtag_set_state(uint8_t openocd_state)
680 uint8_t state = openjtag_get_tap_state(openocd_state);
686 openjtag_add_byte(buf);
689 static void openjtag_execute_statemove(struct jtag_command *cmd)
691 LOG_DEBUG_IO("state move to %i", cmd->cmd.statemove->end_state);
693 tap_set_end_state(cmd->cmd.statemove->end_state);
695 openjtag_set_state(cmd->cmd.statemove->end_state);
697 tap_set_state(tap_get_end_state());
701 static void openjtag_execute_scan(struct jtag_command *cmd)
704 int scan_size, old_state;
707 LOG_DEBUG_IO("scan ends in %s", tap_state_name(cmd->cmd.scan->end_state));
710 tap_set_end_state(cmd->cmd.scan->end_state);
711 scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
713 #ifdef _DEBUG_USB_COMMS_
714 openjtag_debug_buffer(buffer, (scan_size + 7) / 8, DEBUG_TYPE_BUFFER);
717 old_state = tap_get_end_state();
718 openjtag_set_state(cmd->cmd.scan->ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
719 tap_set_state(cmd->cmd.scan->ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
720 tap_set_end_state(old_state);
722 openjtag_add_scan(buffer, scan_size, cmd->cmd.scan);
724 openjtag_set_state(cmd->cmd.scan->ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
725 tap_set_state(cmd->cmd.scan->ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
727 if (tap_get_state() != tap_get_end_state()) {
728 openjtag_set_state(tap_get_end_state());
729 tap_set_state(tap_get_end_state());
733 static void openjtag_execute_runtest(struct jtag_command *cmd)
736 tap_state_t end_state = cmd->cmd.runtest->end_state;
737 tap_set_end_state(end_state);
739 /* only do a state_move when we're not already in IDLE */
740 if (tap_get_state() != TAP_IDLE) {
741 openjtag_set_state(TAP_IDLE);
742 tap_set_state(TAP_IDLE);
745 if (cmd->cmd.runtest->num_cycles > 16)
746 LOG_WARNING("num_cycles > 16 on run test");
748 if (openjtag_variant != OPENJTAG_VARIANT_CY7C65215 ||
749 cmd->cmd.runtest->num_cycles) {
752 command |= ((cmd->cmd.runtest->num_cycles - 1) & 0x0F) << 4;
754 openjtag_add_byte(command);
757 tap_set_end_state(end_state);
758 if (tap_get_end_state() != tap_get_state()) {
759 openjtag_set_state(end_state);
760 tap_set_state(end_state);
764 static void openjtag_execute_command(struct jtag_command *cmd)
766 LOG_DEBUG_IO("openjtag_execute_command %i", cmd->type);
769 openjtag_execute_reset(cmd);
772 openjtag_execute_sleep(cmd);
775 openjtag_execute_statemove(cmd);
778 openjtag_execute_scan(cmd);
781 openjtag_execute_runtest(cmd);
784 /* jlink_execute_pathmove(cmd); break; */
786 LOG_ERROR("BUG: unknown Open JTAG command type encountered");
791 static int openjtag_execute_queue(void)
793 struct jtag_command *cmd = jtag_command_queue;
796 openjtag_execute_command(cmd);
800 return openjtag_execute_tap_queue();
803 static int openjtag_speed_div(int speed, int *khz)
810 static int openjtag_khz(int khz, int *jtag_speed)
815 else if (khz >= 24000)
817 else if (khz >= 12000)
819 else if (khz >= 6000)
821 else if (khz >= 3000)
823 else if (khz >= 1500)
833 COMMAND_HANDLER(openjtag_handle_device_desc_command)
836 openjtag_device_desc = strdup(CMD_ARGV[0]);
838 LOG_ERROR("require exactly one argument to "
839 "openjtag_device_desc <description>");
843 COMMAND_HANDLER(openjtag_handle_variant_command)
846 const char * const *name = openjtag_variant_names;
848 for (; *name; name++, variant++) {
849 if (strcasecmp(CMD_ARGV[0], *name) == 0) {
850 openjtag_variant = variant;
854 LOG_ERROR("unknown openjtag variant '%s'", CMD_ARGV[0]);
856 LOG_ERROR("require exactly one argument to "
857 "openjtag_variant <variant>");
862 static const struct command_registration openjtag_subcommand_handlers[] = {
864 .name = "device_desc",
865 .handler = openjtag_handle_device_desc_command,
866 .mode = COMMAND_CONFIG,
867 .help = "set the USB device description of the OpenJTAG",
868 .usage = "description-string",
872 .handler = openjtag_handle_variant_command,
873 .mode = COMMAND_CONFIG,
874 .help = "set the OpenJTAG variant",
875 .usage = "variant-string",
877 COMMAND_REGISTRATION_DONE
880 static const struct command_registration openjtag_command_handlers[] = {
884 .help = "perform openjtag management",
885 .chain = openjtag_subcommand_handlers,
888 COMMAND_REGISTRATION_DONE
891 static struct jtag_interface openjtag_interface = {
892 .execute_queue = openjtag_execute_queue,
895 struct adapter_driver openjtag_adapter_driver = {
897 .transports = jtag_only,
898 .commands = openjtag_command_handlers,
900 .init = openjtag_init,
901 .quit = openjtag_quit,
902 .speed = openjtag_speed,
904 .speed_div = openjtag_speed_div,
906 .jtag_ops = &openjtag_interface,