// SPDX-License-Identifier: GPL-2.0-or-later /*************************************************************************** * * * Copyright (C) 2009 by Cahya Wirawan <cahya@gmx.at> * * Based on opendous driver by Vladimir Fonov * * * * Copyright (C) 2009 by Vladimir Fonov <vladimir.fonov@gmai.com> * * Based on J-link driver by Juergen Stuber * * * * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> * * based on Dominic Rath's and Benedikt Sauter's usbprog.c * * * * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * ***************************************************************************//* ... */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <jtag/interface.h> #include <jtag/commands.h> #include "libusb_helper.h" #include <string.h> #include <time.h> 5 includes #define OPENDOUS_MAX_VIDS_PIDS 4 /* define some probes with similar interface */ struct opendous_probe { const char *name; uint16_t VID[OPENDOUS_MAX_VIDS_PIDS]; uint16_t PID[OPENDOUS_MAX_VIDS_PIDS]; uint8_t READ_EP; uint8_t WRITE_EP; uint8_t CONTROL_TRANSFER; int BUFFERSIZE; ...}; static const struct opendous_probe opendous_probes[] = { {"usbprog-jtag", {0x1781, 0}, {0x0C63, 0}, 0x82, 0x02, 0x00, 510 }, {"opendous", {0x1781, 0x03EB, 0}, {0xC0C0, 0x204F, 0}, 0x81, 0x02, 0x00, 360 }, {"usbvlab", {0x16C0, 0}, {0x05DC, 0}, 0x81, 0x02, 0x01, 360 }, {NULL, {0x0000}, {0x0000}, 0x00, 0x00, 0x00, 0 } ...}; #define OPENDOUS_WRITE_ENDPOINT (opendous_probe->WRITE_EP) #define OPENDOUS_READ_ENDPOINT (opendous_probe->READ_EP) static unsigned int opendous_hw_jtag_version = 1; #define OPENDOUS_USB_TIMEOUT 1000 #define OPENDOUS_USB_BUFFER_SIZE (opendous_probe->BUFFERSIZE) #define OPENDOUS_IN_BUFFER_SIZE (OPENDOUS_USB_BUFFER_SIZE) #define OPENDOUS_OUT_BUFFER_SIZE (OPENDOUS_USB_BUFFER_SIZE) /* Global USB buffers */ static uint8_t *usb_in_buffer; static uint8_t *usb_out_buffer; /* Constants for OPENDOUS command */ #define OPENDOUS_MAX_SPEED 66 #define OPENDOUS_MAX_TAP_TRANSMIT ((opendous_probe->BUFFERSIZE)-10) #define OPENDOUS_MAX_INPUT_DATA (OPENDOUS_MAX_TAP_TRANSMIT*4) /* TAP */ #define OPENDOUS_TAP_BUFFER_SIZE 65536 struct pending_scan_result { int first; /* First bit position in tdo_buffer to read */ int length; /* Number of bits to read */ struct scan_command *command; /* Corresponding scan command */ uint8_t *buffer; ...}; static int pending_scan_results_length; static struct pending_scan_result *pending_scan_results_buffer; #define MAX_PENDING_SCAN_RESULTS (OPENDOUS_MAX_INPUT_DATA) /* JTAG usb commands */ #define JTAG_CMD_TAP_OUTPUT 0x0 #define JTAG_CMD_SET_TRST 0x1 #define JTAG_CMD_SET_SRST 0x2 #define JTAG_CMD_READ_INPUT 0x3 #define JTAG_CMD_TAP_OUTPUT_EMU 0x4 #define JTAG_CMD_SET_DELAY 0x5 #define JTAG_CMD_SET_SRST_TRST 0x6 #define JTAG_CMD_READ_CONFIG 0x7 /* usbvlab control transfer */ #define FUNC_START_BOOTLOADER 30 #define FUNC_WRITE_DATA 0x50 #define FUNC_READ_DATA 0x51 12 defines static char *opendous_type; static const struct opendous_probe *opendous_probe; /* External interface functions */ static int opendous_execute_queue(struct jtag_command *cmd_queue); static int opendous_init(void); static int opendous_quit(void); /* Queue command functions */ static void opendous_end_state(tap_state_t state); static void opendous_state_move(void); static void opendous_path_move(unsigned int num_states, tap_state_t *path); static void opendous_runtest(unsigned int num_cycles); static void opendous_scan(int ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command); static void opendous_reset(int trst, int srst); static void opendous_simple_command(uint8_t command, uint8_t _data); static int opendous_get_status(void); /* opendous tap buffer functions */ static void opendous_tap_init(void); static int opendous_tap_execute(void); static void opendous_tap_ensure_space(int scans, int bits); static void opendous_tap_append_step(int tms, int tdi); static void opendous_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command); /* opendous lowlevel functions */ struct opendous_jtag { struct libusb_device_handle *usb_handle; ...}; static struct opendous_jtag *opendous_usb_open(void); static void opendous_usb_close(struct opendous_jtag *opendous_jtag); static int opendous_usb_message(struct opendous_jtag *opendous_jtag, int out_length, int in_length); static int opendous_usb_write(struct opendous_jtag *opendous_jtag, int out_length); static int opendous_usb_read(struct opendous_jtag *opendous_jtag); /* helper functions */ static int opendous_get_version_info(void); #ifdef _DEBUG_USB_COMMS_ static void opendous_debug_buffer(uint8_t *buffer, int length); #endif static struct opendous_jtag *opendous_jtag_handle; /***************************************************************************/ /* External interface implementation */ COMMAND_HANDLER(opendous_handle_opendous_type_command) { if (CMD_ARGC == 0) return ERROR_OK; /* only if the cable name wasn't overwritten by cmdline */ if (!opendous_type) { /* REVISIT first verify that it's listed in cables[] ... */ opendous_type = strdup(CMD_ARGV[0]); }if (!opendous_type) { ... } /* REVISIT it's probably worth returning the current value ... */ return ERROR_OK; }{ ... } COMMAND_HANDLER(opendous_handle_opendous_info_command) { if (opendous_get_version_info() == ERROR_OK) { /* attempt to get status */ opendous_get_status(); }if (opendous_get_version_info() == ERROR_OK) { ... } return ERROR_OK; }{ ... } COMMAND_HANDLER(opendous_handle_opendous_hw_jtag_command) { switch (CMD_ARGC) { case 0: command_print(CMD, "opendous hw jtag %i", opendous_hw_jtag_version); break; case 0: case 1: { int request_version = atoi(CMD_ARGV[0]); switch (request_version) { case 2: case 3: opendous_hw_jtag_version = request_version; break; case 3: default: return ERROR_COMMAND_SYNTAX_ERROR;default }switch (request_version) { ... } break; ...} case 1: default: return ERROR_COMMAND_SYNTAX_ERROR;default }switch (CMD_ARGC) { ... } return ERROR_OK; }{ ... } static const struct command_registration opendous_command_handlers[] = { { .name = "opendous_info", .handler = &opendous_handle_opendous_info_command, .mode = COMMAND_EXEC, .help = "show opendous info", .usage = "", ...}, { .name = "opendous_hw_jtag", .handler = &opendous_handle_opendous_hw_jtag_command, .mode = COMMAND_EXEC, .help = "access opendous HW JTAG command version", .usage = "[2|3]", ...}, { .name = "opendous_type", .handler = &opendous_handle_opendous_type_command, .mode = COMMAND_CONFIG, .help = "set opendous type", .usage = "[usbvlab|usbprog-jtag|opendous]", ...}, COMMAND_REGISTRATION_DONE ...}; static struct jtag_interface opendous_interface = { .execute_queue = opendous_execute_queue, ...}; struct adapter_driver opendous_adapter_driver = { .name = "opendous", .transports = jtag_only, .commands = opendous_command_handlers, .init = opendous_init, .quit = opendous_quit, .jtag_ops = &opendous_interface, ...}; static int opendous_execute_queue(struct jtag_command *cmd_queue) { struct jtag_command *cmd = cmd_queue; int scan_size; enum scan_type type; uint8_t *buffer; while (cmd) { switch (cmd->type) { case JTAG_RUNTEST: LOG_DEBUG_IO("runtest %u cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state); if (cmd->cmd.runtest->end_state != -1) opendous_end_state(cmd->cmd.runtest->end_state); opendous_runtest(cmd->cmd.runtest->num_cycles); break; case JTAG_RUNTEST: case JTAG_TLR_RESET: LOG_DEBUG_IO("statemove end in %i", cmd->cmd.statemove->end_state); if (cmd->cmd.statemove->end_state != -1) opendous_end_state(cmd->cmd.statemove->end_state); opendous_state_move(); break; case JTAG_TLR_RESET: case JTAG_PATHMOVE: LOG_DEBUG_IO("pathmove: %u states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]); opendous_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path); break; case JTAG_PATHMOVE: case JTAG_SCAN: LOG_DEBUG_IO("scan end in %i", cmd->cmd.scan->end_state); if (cmd->cmd.scan->end_state != -1) opendous_end_state(cmd->cmd.scan->end_state); scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer); LOG_DEBUG_IO("scan input, length = %d", scan_size); #ifdef _DEBUG_USB_COMMS_ opendous_debug_buffer(buffer, (scan_size + 7) / 8); #endif type = jtag_scan_type(cmd->cmd.scan); opendous_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan); break; case JTAG_SCAN: case JTAG_RESET: LOG_DEBUG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst); opendous_tap_execute(); if (cmd->cmd.reset->trst == 1) tap_set_state(TAP_RESET); opendous_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst); break; case JTAG_RESET: case JTAG_SLEEP: LOG_DEBUG_IO("sleep %" PRIu32, cmd->cmd.sleep->us); opendous_tap_execute(); jtag_sleep(cmd->cmd.sleep->us); break; case JTAG_SLEEP: default: LOG_ERROR("BUG: unknown JTAG command type encountered"); exit(-1);default }switch (cmd->type) { ... } cmd = cmd->next; }while (cmd) { ... } return opendous_tap_execute(); }{ ... } static int opendous_init(void) { int check_cnt; const struct opendous_probe *cur_opendous_probe; cur_opendous_probe = opendous_probes; if (!opendous_type) { opendous_type = strdup("opendous"); LOG_WARNING("No opendous_type specified, using default 'opendous'"); }if (!opendous_type) { ... } while (cur_opendous_probe->name) { if (strcmp(cur_opendous_probe->name, opendous_type) == 0) { opendous_probe = cur_opendous_probe; break; }if (strcmp(cur_opendous_probe->name, opendous_type) == 0) { ... } cur_opendous_probe++; }while (cur_opendous_probe->name) { ... } if (!opendous_probe) { LOG_ERROR("No matching cable found for %s", opendous_type); return ERROR_JTAG_INIT_FAILED; }if (!opendous_probe) { ... } usb_in_buffer = malloc(opendous_probe->BUFFERSIZE); usb_out_buffer = malloc(opendous_probe->BUFFERSIZE); pending_scan_results_buffer = malloc( MAX_PENDING_SCAN_RESULTS * sizeof(*pending_scan_results_buffer)); opendous_jtag_handle = opendous_usb_open(); if (!opendous_jtag_handle) { LOG_ERROR("Cannot find opendous Interface! Please check connection and permissions."); return ERROR_JTAG_INIT_FAILED; }if (!opendous_jtag_handle) { ... } check_cnt = 0; while (check_cnt < 3) { if (opendous_get_version_info() == ERROR_OK) { /* attempt to get status */ opendous_get_status(); break; }if (opendous_get_version_info() == ERROR_OK) { ... } check_cnt++; }while (check_cnt < 3) { ... } LOG_INFO("opendous JTAG Interface ready"); opendous_reset(0, 0); opendous_tap_init(); return ERROR_OK; }{ ... } static int opendous_quit(void) { opendous_usb_close(opendous_jtag_handle); free(usb_out_buffer); usb_out_buffer = NULL; free(usb_in_buffer); usb_in_buffer = NULL; free(pending_scan_results_buffer); pending_scan_results_buffer = NULL; free(opendous_type); opendous_type = NULL; return ERROR_OK; }{ ... } .../***************************************************************************/ /* Queue command implementations */ void opendous_end_state(tap_state_t state) { if (tap_is_state_stable(state)) tap_set_end_state(state); else { LOG_ERROR("BUG: %i is not a valid end state", state); exit(-1); }else { ... } }{ ... } /* Goes to the end state. */ void opendous_state_move(void) { int i; int tms = 0; uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state()); uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state()); for (i = 0; i < tms_scan_bits; i++) { tms = (tms_scan >> i) & 1; opendous_tap_append_step(tms, 0); }for (i = 0; i < tms_scan_bits; i++) { ... } tap_set_state(tap_get_end_state()); }{ ... } void opendous_path_move(unsigned int num_states, tap_state_t *path) { for (unsigned int i = 0; i < num_states; i++) { if (path[i] == tap_state_transition(tap_get_state(), false)) opendous_tap_append_step(0, 0); else if (path[i] == tap_state_transition(tap_get_state(), true)) opendous_tap_append_step(1, 0); else { LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path[i])); exit(-1); }else { ... } tap_set_state(path[i]); }for (unsigned int i = 0; i < num_states; i++) { ... } tap_set_end_state(tap_get_state()); }{ ... } void opendous_runtest(unsigned int num_cycles) { tap_state_t saved_end_state = tap_get_end_state(); /* only do a state_move when we're not already in IDLE */ if (tap_get_state() != TAP_IDLE) { opendous_end_state(TAP_IDLE); opendous_state_move(); }if (tap_get_state() != TAP_IDLE) { ... } /* execute num_cycles */ for (unsigned int i = 0; i < num_cycles; i++) opendous_tap_append_step(0, 0); /* finish in end_state */ opendous_end_state(saved_end_state); if (tap_get_state() != tap_get_end_state()) opendous_state_move(); }{ ... } void opendous_scan(int ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command) { tap_state_t saved_end_state; opendous_tap_ensure_space(1, scan_size + 8); saved_end_state = tap_get_end_state(); /* Move to appropriate scan state */ opendous_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT); if (tap_get_state() != tap_get_end_state()) opendous_state_move(); opendous_end_state(saved_end_state); /* Scan */ opendous_tap_append_scan(scan_size, buffer, command); /* We are in Exit1, go to Pause */ opendous_tap_append_step(0, 0); tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE); if (tap_get_state() != tap_get_end_state()) opendous_state_move(); }{ ... } void opendous_reset(int trst, int srst) { LOG_DEBUG("trst: %i, srst: %i", trst, srst); /* Signals are active low */ #if 0 if (srst == 0) opendous_simple_command(JTAG_CMD_SET_SRST, 1); else if (srst == 1) opendous_simple_command(JTAG_CMD_SET_SRST, 0); if (trst == 0) opendous_simple_command(JTAG_CMD_SET_TRST, 1); else if (trst == 1) opendous_simple_command(JTAG_CMD_SET_TRST, 0);/* ... */ #endif srst = srst ? 0 : 1; trst = trst ? 0 : 2; opendous_simple_command(JTAG_CMD_SET_SRST_TRST, srst | trst); }{ ... } void opendous_simple_command(uint8_t command, uint8_t _data) { int result; LOG_DEBUG_IO("0x%02x 0x%02x", command, _data); usb_out_buffer[0] = 2; usb_out_buffer[1] = 0; usb_out_buffer[2] = command; usb_out_buffer[3] = _data; result = opendous_usb_message(opendous_jtag_handle, 4, 1); if (result != 1) LOG_ERROR("opendous command 0x%02x failed (%d)", command, result); }{ ... } int opendous_get_status(void) { return ERROR_OK; }{ ... } static int opendous_get_version_info(void) { return ERROR_OK; }{ ... } .../***************************************************************************/ /* Estick tap functions */ static int tap_length; static uint8_t tms_buffer[OPENDOUS_TAP_BUFFER_SIZE]; static uint8_t tdo_buffer[OPENDOUS_TAP_BUFFER_SIZE]; static int last_tms; void opendous_tap_init(void) { tap_length = 0; pending_scan_results_length = 0; }{ ... } void opendous_tap_ensure_space(int scans, int bits) { int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length; int available_bits = OPENDOUS_TAP_BUFFER_SIZE / 2 - tap_length; if ((scans > available_scans) || (bits > available_bits)) opendous_tap_execute(); }{ ... } void opendous_tap_append_step(int tms, int tdi) { last_tms = tms; unsigned char _tms = tms ? 1 : 0; unsigned char _tdi = tdi ? 1 : 0; opendous_tap_ensure_space(0, 1); int tap_index = tap_length / 4; int bits = (tap_length % 4) * 2; if (tap_length < OPENDOUS_TAP_BUFFER_SIZE) { if (!bits) tms_buffer[tap_index] = 0; tms_buffer[tap_index] |= (_tdi << bits)|(_tms << (bits + 1)); tap_length++; }if (tap_length < OPENDOUS_TAP_BUFFER_SIZE) { ... } else LOG_ERROR("opendous_tap_append_step, overflow"); }{ ... } void opendous_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command) { LOG_DEBUG_IO("append scan, length = %d", length); struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length]; int i; pending_scan_result->first = tap_length; pending_scan_result->length = length; pending_scan_result->command = command; pending_scan_result->buffer = buffer; for (i = 0; i < length; i++) opendous_tap_append_step((i < length-1 ? 0 : 1), (buffer[i / 8] >> (i % 8)) & 1); pending_scan_results_length++; }{ ... } /* Pad and send a tap sequence to the device, and receive the answer. * For the purpose of padding we assume that we are in idle or pause state. *//* ... */ int opendous_tap_execute(void) { int byte_length; int i, j; int result; #ifdef _DEBUG_USB_COMMS_ int byte_length_out; #endif if (tap_length > 0) { /* memset(tdo_buffer,0,OPENDOUS_TAP_BUFFER_SIZE); */ /* LOG_INFO("OPENDOUS tap execute %d",tap_length); */ byte_length = (tap_length + 3) / 4; #ifdef _DEBUG_USB_COMMS_ byte_length_out = (tap_length + 7) / 8; LOG_DEBUG("opendous is sending %d bytes", byte_length);/* ... */ #endif for (j = 0, i = 0; j < byte_length;) { int receive; int transmit = byte_length - j; if (transmit > OPENDOUS_MAX_TAP_TRANSMIT) { transmit = OPENDOUS_MAX_TAP_TRANSMIT; receive = (OPENDOUS_MAX_TAP_TRANSMIT) / 2; usb_out_buffer[2] = JTAG_CMD_TAP_OUTPUT; }if (transmit > OPENDOUS_MAX_TAP_TRANSMIT) { ... } else { usb_out_buffer[2] = JTAG_CMD_TAP_OUTPUT | ((tap_length % 4) << 4); receive = (transmit + 1) / 2; }else { ... } usb_out_buffer[0] = (transmit + 1) & 0xff; usb_out_buffer[1] = ((transmit + 1) >> 8) & 0xff; memmove(usb_out_buffer + 3, tms_buffer + j, transmit); result = opendous_usb_message(opendous_jtag_handle, 3 + transmit, receive); if (result != receive) { LOG_ERROR("opendous_tap_execute, wrong result %d, expected %d", result, receive); return ERROR_JTAG_QUEUE_FAILED; }if (result != receive) { ... } memmove(tdo_buffer + i, usb_in_buffer, receive); i += receive; j += transmit; }for (j = 0, i = 0; j < byte_length;) { ... } #ifdef _DEBUG_USB_COMMS_ LOG_DEBUG("opendous tap result %d", byte_length_out); opendous_debug_buffer(tdo_buffer, byte_length_out);/* ... */ #endif /* LOG_INFO("eStick tap execute %d",tap_length); */ for (i = 0; i < pending_scan_results_length; i++) { struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i]; uint8_t *buffer = pending_scan_result->buffer; int length = pending_scan_result->length; int first = pending_scan_result->first; struct scan_command *command = pending_scan_result->command; /* Copy to buffer */ buf_set_buf(tdo_buffer, first, buffer, 0, length); LOG_DEBUG_IO("pending scan result, length = %d", length); #ifdef _DEBUG_USB_COMMS_ opendous_debug_buffer(buffer, byte_length_out); #endif if (jtag_read_buffer(buffer, command) != ERROR_OK) { opendous_tap_init(); return ERROR_JTAG_QUEUE_FAILED; }if (jtag_read_buffer(buffer, command) != ERROR_OK) { ... } free(pending_scan_result->buffer); }for (i = 0; i < pending_scan_results_length; i++) { ... } opendous_tap_init(); }if (tap_length > 0) { ... } return ERROR_OK; }{ ... } .../*****************************************************************************/ /* Estick USB low-level functions */ struct opendous_jtag *opendous_usb_open(void) { struct opendous_jtag *result; struct libusb_device_handle *devh; if (jtag_libusb_open(opendous_probe->VID, opendous_probe->PID, NULL, &devh, NULL) != ERROR_OK) return NULL; jtag_libusb_set_configuration(devh, 0); libusb_claim_interface(devh, 0); result = malloc(sizeof(*result)); result->usb_handle = devh; return result; }{ ... } void opendous_usb_close(struct opendous_jtag *opendous_jtag) { jtag_libusb_close(opendous_jtag->usb_handle); free(opendous_jtag); }{ ... } /* Send a message and receive the reply. */ int opendous_usb_message(struct opendous_jtag *opendous_jtag, int out_length, int in_length) { int result; result = opendous_usb_write(opendous_jtag, out_length); if (result == out_length) { result = opendous_usb_read(opendous_jtag); if (result == in_length) return result; else { LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result); return -1; }else { ... } }if (result == out_length) { ... } else { LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result); return -1; }else { ... } }{ ... } /* Write data from out_buffer to USB. */ int opendous_usb_write(struct opendous_jtag *opendous_jtag, int out_length) { int result, transferred; if (out_length > OPENDOUS_OUT_BUFFER_SIZE) { LOG_ERROR("opendous_jtag_write illegal out_length=%d (max=%d)", out_length, OPENDOUS_OUT_BUFFER_SIZE); return -1; }if (out_length > OPENDOUS_OUT_BUFFER_SIZE) { ... } #ifdef _DEBUG_USB_COMMS_ LOG_DEBUG("USB write begin"); #endif if (opendous_probe->CONTROL_TRANSFER) { result = jtag_libusb_control_transfer(opendous_jtag->usb_handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_OUT, FUNC_WRITE_DATA, 0, 0, (char *)usb_out_buffer, out_length, OPENDOUS_USB_TIMEOUT, &transferred); /* FIXME: propagate error separately from transferred */ if (result == ERROR_OK) result = transferred; }if (opendous_probe->CONTROL_TRANSFER) { ... } else { jtag_libusb_bulk_write(opendous_jtag->usb_handle, OPENDOUS_WRITE_ENDPOINT, (char *)usb_out_buffer, out_length, OPENDOUS_USB_TIMEOUT, &result); }else { ... } #ifdef _DEBUG_USB_COMMS_ LOG_DEBUG("USB write end: %d bytes", result); #endif LOG_DEBUG_IO("opendous_usb_write, out_length = %d, result = %d", out_length, result); #ifdef _DEBUG_USB_COMMS_ opendous_debug_buffer(usb_out_buffer, out_length); #endif return result; }{ ... } /* Read data from USB into in_buffer. */ int opendous_usb_read(struct opendous_jtag *opendous_jtag) { int transferred; #ifdef _DEBUG_USB_COMMS_ LOG_DEBUG("USB read begin"); #endif int result; if (opendous_probe->CONTROL_TRANSFER) { result = jtag_libusb_control_transfer(opendous_jtag->usb_handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN, FUNC_READ_DATA, 0, 0, (char *)usb_in_buffer, OPENDOUS_IN_BUFFER_SIZE, OPENDOUS_USB_TIMEOUT, &transferred); /* FIXME: propagate error separately from transferred */ if (result == ERROR_OK) result = transferred; }if (opendous_probe->CONTROL_TRANSFER) { ... } else { jtag_libusb_bulk_read(opendous_jtag->usb_handle, OPENDOUS_READ_ENDPOINT, (char *)usb_in_buffer, OPENDOUS_IN_BUFFER_SIZE, OPENDOUS_USB_TIMEOUT, &result); }else { ... } #ifdef _DEBUG_USB_COMMS_ LOG_DEBUG("USB read end: %d bytes", result); #endif LOG_DEBUG_IO("opendous_usb_read, result = %d", result); #ifdef _DEBUG_USB_COMMS_ opendous_debug_buffer(usb_in_buffer, result); #endif return result; }{ ... } #ifdef _DEBUG_USB_COMMS_ #define BYTES_PER_LINE 16 void opendous_debug_buffer(uint8_t *buffer, int length) { char line[8 + 3 * BYTES_PER_LINE + 1]; for (int i = 0; i < length; i += BYTES_PER_LINE) { int n = snprintf(line, 9, "%04x", i); for (int j = i; j < i + BYTES_PER_LINE && j < length; j++) n += snprintf(line + n, 4, " %02x", buffer[j]); LOG_DEBUG("%s", line); }for (int i = 0; i < length; i += BYTES_PER_LINE) { ... } }opendous_debug_buffer (uint8_t *buffer, int length) { ... } /* ... */#endif...