--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
+ * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "replacements.h"
+
+#include "jtag.h"
+
+#include <usb.h>
+#include <string.h>
+
+#include "log.h"
+
+/* enable this to debug communication
+ */
+#if 0
+#define _DEBUG_USB_COMMS_
+#endif
+
+#ifdef _DEBUG_JTAG_IO_
+#define DEBUG_JTAG_IO(expr ...) LOG_DEBUG(expr)
+#else
+#define DEBUG_JTAG_IO(expr ...)
+#endif
+
+#define VID 0x1366
+#define PID 0x0101
+
+#define JLINK_WRITE_ENDPOINT 0x02
+#define JLINK_READ_ENDPOINT 0x81
+
+#define JLINK_USB_TIMEOUT 100
+
+#define JLINK_IN_BUFFER_SIZE 2064
+#define JLINK_OUT_BUFFER_SIZE 2064
+
+/* Global USB buffers */
+static u8 usb_in_buffer[JLINK_IN_BUFFER_SIZE];
+static u8 usb_out_buffer[JLINK_OUT_BUFFER_SIZE];
+
+/* Constants for JLink command */
+#define JLINK_FIRMWARE_VERSION 0x01
+#define JLINK_SPEED_COMMAND 0x05
+#define JLINK_GET_STATUS_COMMAND 0x07
+#define JLINK_TAP_SEQUENCE_COMMAND 0xcd
+#define JLINK_GET_SERIAL 0xe6
+#define JLINK_SET_SRST_LOW_COMMAND 0xdc
+#define JLINK_SET_SRST_HIGH_COMMAND 0xdd
+#define JLINK_SET_TRST_LOW_COMMAND 0xde
+#define JLINK_SET_TRST_HIGH_COMMAND 0xdf
+#define JLINK_HARDWARE_VERSION 0xe8
+
+/* max speed 12MHz v5.0 jlink */
+#define JLINK_MAX_SPEED 12000
+
+/* External interface functions */
+int jlink_execute_queue(void);
+int jlink_speed(int speed);
+int jlink_khz(int khz, int *jtag_speed);
+int jlink_register_commands(struct command_context_s *cmd_ctx);
+int jlink_init(void);
+int jlink_quit(void);
+
+/* CLI command handler functions */
+int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
+/* Queue command functions */
+void jlink_end_state(enum tap_state state);
+void jlink_state_move(void);
+void jlink_path_move(int num_states, enum tap_state *path);
+void jlink_runtest(int num_cycles);
+void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+void jlink_reset(int trst, int srst);
+void jlink_simple_command(u8 command);
+int jlink_get_status(void);
+
+/* J-Link tap buffer functions */
+void jlink_tap_init();
+int jlink_tap_execute();
+void jlink_tap_ensure_space(int scans, int bits);
+void jlink_tap_append_step(int tms, int tdi);
+void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *command);
+
+/* Jlink lowlevel functions */
+typedef struct jlink_jtag
+{
+ struct usb_dev_handle* usb_handle;
+} jlink_jtag_t;
+
+jlink_jtag_t *jlink_usb_open(void);
+void jlink_usb_close(jlink_jtag_t *jlink_jtag);
+int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length);
+int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length);
+int jlink_usb_read(jlink_jtag_t *jlink_jtag);
+
+#ifdef _DEBUG_USB_COMMS_
+void jlink_debug_buffer(u8 *buffer, int length);
+#endif
+
+jlink_jtag_t* jlink_jtag_handle;
+
+/***************************************************************************/
+/* External interface implementation */
+
+jtag_interface_t jlink_interface =
+{
+ .name = "jlink",
+ .execute_queue = jlink_execute_queue,
+ .speed = jlink_speed,
+ .khz = jlink_khz,
+ .register_commands = jlink_register_commands,
+ .init = jlink_init,
+ .quit = jlink_quit
+};
+
+int jlink_execute_queue(void)
+{
+ jtag_command_t *cmd = jtag_command_queue;
+ int scan_size;
+ enum scan_type type;
+ u8 *buffer;
+
+ while (cmd != NULL)
+ {
+ switch (cmd->type)
+ {
+ case JTAG_END_STATE:
+ DEBUG_JTAG_IO("end_state: %i", cmd->cmd.end_state->end_state);
+
+ if (cmd->cmd.end_state->end_state != -1)
+ {
+ jlink_end_state(cmd->cmd.end_state->end_state);
+ }
+ break;
+
+ case JTAG_RUNTEST:
+ DEBUG_JTAG_IO( "runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, \
+ cmd->cmd.runtest->end_state);
+
+ if (cmd->cmd.runtest->end_state != -1)
+ {
+ jlink_end_state(cmd->cmd.runtest->end_state);
+ }
+ jlink_runtest(cmd->cmd.runtest->num_cycles);
+ break;
+
+ case JTAG_STATEMOVE:
+ DEBUG_JTAG_IO("statemove end in %i",
+ cmd->cmd.statemove->end_state);
+
+ if (cmd->cmd.statemove->end_state != -1)
+ {
+ jlink_end_state(cmd->cmd.statemove->end_state);
+ }
+ jlink_state_move();
+ break;
+
+ case JTAG_PATHMOVE:
+ DEBUG_JTAG_IO("pathmove: %i states, end in %i",
+ cmd->cmd.pathmove->num_states,
+ cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
+
+ jlink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
+ break;
+
+ case JTAG_SCAN:
+ DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state);
+
+ if (cmd->cmd.scan->end_state != -1)
+ {
+ jlink_end_state(cmd->cmd.scan->end_state);
+ }
+
+ scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
+ DEBUG_JTAG_IO("scan input, length = %d", scan_size);
+
+#ifdef _DEBUG_USB_COMMS_
+ jlink_debug_buffer(buffer, (scan_size + 7) / 8);
+#endif
+ type = jtag_scan_type(cmd->cmd.scan);
+ jlink_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan);
+ break;
+
+ case JTAG_RESET:
+ DEBUG_JTAG_IO("reset trst: %i srst %i",
+ cmd->cmd.reset->trst,
+ cmd->cmd.reset->srst);
+
+ jlink_tap_execute();
+
+ if (cmd->cmd.reset->trst == 1)
+ {
+ cur_state = TAP_TLR;
+ }
+ jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+ break;
+
+ case JTAG_SLEEP:
+ DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
+ jlink_tap_execute();
+ jtag_sleep(cmd->cmd.sleep->us);
+ break;
+
+ default:
+ LOG_ERROR("BUG: unknown JTAG command type encountered");
+ exit(-1);
+ }
+ cmd = cmd->next;
+ }
+ jlink_tap_execute();
+
+ return ERROR_OK;
+}
+
+/* Sets speed in kHz. */
+int jlink_speed(int speed)
+{
+ int result;
+
+// if ((speed == -1) || ((1 <= speed) && (speed <= JLINK_MAX_SPEED)))
+ if (speed <= JLINK_MAX_SPEED)
+ {
+ /* check for RTCK setting */
+ if (speed == 0)
+ speed = -1;
+
+ usb_out_buffer[0] = JLINK_SPEED_COMMAND;
+ usb_out_buffer[1] = (speed >> 0) & 0xff;
+ usb_out_buffer[2] = (speed >> 8) & 0xff;
+
+ result = jlink_usb_write(jlink_jtag_handle, 3);
+
+ if (result == 3)
+ {
+ return ERROR_OK;
+ }
+ else
+ {
+ LOG_ERROR("J-Link setting speed failed (%d)", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ }
+ else
+ {
+ LOG_INFO("Requested speed %dkHz exceeds maximum of %dkHz, ignored", speed, JLINK_MAX_SPEED);
+ }
+
+ return ERROR_OK;
+}
+
+int jlink_khz(int khz, int *jtag_speed)
+{
+ *jtag_speed = khz;
+
+ return ERROR_OK;
+}
+
+int jlink_register_commands(struct command_context_s *cmd_ctx)
+{
+ register_command(cmd_ctx, NULL, "jlink_info", jlink_handle_jlink_info_command, COMMAND_EXEC,
+ "query jlink info");
+ return ERROR_OK;
+}
+
+int jlink_init(void)
+{
+ int result;
+
+ jlink_jtag_handle = jlink_usb_open();
+
+ if (jlink_jtag_handle == 0)
+ {
+ LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ result = jlink_usb_read(jlink_jtag_handle);
+ if (result != 2 || usb_in_buffer[0] != 0x07 || usb_in_buffer[1] != 0x00)
+ {
+ LOG_INFO("J-Link initial read failed, don't worry");
+ }
+
+ LOG_INFO("J-Link JTAG Interface ready");
+
+ jlink_reset(0, 0);
+ jlink_tap_init();
+
+ /* query jlink status */
+ jlink_get_status();
+
+ return ERROR_OK;
+}
+
+int jlink_quit(void)
+{
+ jlink_usb_close(jlink_jtag_handle);
+ return ERROR_OK;
+}
+
+/***************************************************************************/
+/* Queue command implementations */
+
+void jlink_end_state(enum tap_state state)
+{
+ if (tap_move_map[state] != -1)
+ {
+ end_state = state;
+ }
+ else
+ {
+ LOG_ERROR("BUG: %i is not a valid end state", state);
+ exit(-1);
+ }
+}
+
+/* Goes to the end state. */
+void jlink_state_move(void)
+{
+ int i;
+ int tms = 0;
+ u8 tms_scan = TAP_MOVE(cur_state, end_state);
+
+ for (i = 0; i < 7; i++)
+ {
+ tms = (tms_scan >> i) & 1;
+ jlink_tap_append_step(tms, 0);
+ }
+
+ cur_state = end_state;
+}
+
+void jlink_path_move(int num_states, enum tap_state *path)
+{
+ int i;
+
+ for (i = 0; i < num_states; i++)
+ {
+ if (path[i] == tap_transitions[cur_state].low)
+ {
+ jlink_tap_append_step(0, 0);
+ }
+ else if (path[i] == tap_transitions[cur_state].high)
+ {
+ jlink_tap_append_step(1, 0);
+ }
+ else
+ {
+ LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[path[i]]);
+ exit(-1);
+ }
+
+ cur_state = path[i];
+ }
+
+ end_state = cur_state;
+}
+
+void jlink_runtest(int num_cycles)
+{
+ int i;
+
+ enum tap_state saved_end_state = end_state;
+
+ /* only do a state_move when we're not already in RTI */
+ if (cur_state != TAP_RTI)
+ {
+ jlink_end_state(TAP_RTI);
+ jlink_state_move();
+ }
+
+ /* execute num_cycles */
+ for (i = 0; i < num_cycles; i++)
+ {
+ jlink_tap_append_step(0, 0);
+ }
+
+ /* finish in end_state */
+ jlink_end_state(saved_end_state);
+ if (cur_state != end_state)
+ {
+ jlink_state_move();
+ }
+}
+
+void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
+{
+ enum tap_state saved_end_state;
+
+ jlink_tap_ensure_space(1, scan_size + 8);
+
+ saved_end_state = end_state;
+
+ /* Move to appropriate scan state */
+ jlink_end_state(ir_scan ? TAP_SI : TAP_SD);
+
+ jlink_state_move();
+ jlink_end_state(saved_end_state);
+
+ /* Scan */
+ jlink_tap_append_scan(scan_size, buffer, command);
+
+ /* We are in Exit1, go to Pause */
+ jlink_tap_append_step(0, 0);
+
+ cur_state = ir_scan ? TAP_PI : TAP_PD;
+
+ if (cur_state != end_state)
+ {
+ jlink_state_move();
+ }
+}
+
+void jlink_reset(int trst, int srst)
+{
+ LOG_DEBUG("trst: %i, srst: %i", trst, srst);
+
+ /* Signals are active low */
+ if (trst == 0)
+ {
+ jlink_simple_command(JLINK_SET_TRST_HIGH_COMMAND);
+ }
+ else if (trst == 1)
+ {
+ jlink_simple_command(JLINK_SET_TRST_LOW_COMMAND);
+ }
+
+ if (srst == 0)
+ {
+ jlink_simple_command(JLINK_SET_SRST_HIGH_COMMAND);
+ }
+ else if (srst == 1)
+ {
+ jlink_simple_command(JLINK_SET_SRST_LOW_COMMAND);
+ }
+}
+
+void jlink_simple_command(u8 command)
+{
+ int result;
+
+ DEBUG_JTAG_IO("0x%02x", command);
+
+ usb_out_buffer[0] = command;
+ result = jlink_usb_write(jlink_jtag_handle, 1);
+
+ if (result != 1)
+ {
+ LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
+ }
+}
+
+int jlink_get_status(void)
+{
+ int result;
+
+ jlink_simple_command(JLINK_GET_STATUS_COMMAND);
+ result = jlink_usb_read(jlink_jtag_handle);
+
+ if(result == 8)
+ {
+ int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
+ LOG_INFO("Vref = %d.%d TCK=%d TDI=%d TDO=%d TMS=%d SRST=%d TRST=%d\n", \
+ vref / 1000, vref % 1000, \
+ usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
+ usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
+
+ if(vref < 1500)
+ {
+ LOG_ERROR("Vref too low. Eventually the target isn't powered or disconnected?\n");
+ }
+ }
+ else
+ {
+ LOG_ERROR("J-Link command JLINK_GET_STATUS_COMMAND failed (%d)\n", result);
+ }
+
+ return ERROR_OK;
+}
+
+int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ int result;
+ int len = 0;
+
+ /* query hardware version */
+ jlink_simple_command(JLINK_FIRMWARE_VERSION);
+ result = jlink_usb_read(jlink_jtag_handle);
+
+ if (result == 2)
+ {
+ len = buf_get_u32(usb_in_buffer, 0, 16);
+ result = jlink_usb_read(jlink_jtag_handle);
+
+ if(result == len)
+ {
+ usb_in_buffer[result] = 0;
+ LOG_INFO(usb_in_buffer);
+ }
+
+ /* attempt to get status */
+ jlink_get_status();
+ }
+ else
+ {
+ LOG_ERROR("J-Link command JLINK_FIRMWARE_VERSION failed (%d)\n", result);
+ }
+
+ return ERROR_OK;
+}
+
+/***************************************************************************/
+/* J-Link tap functions */
+
+/* We use the maximal value observed */
+#define JLINK_TAP_BUFFER_SIZE 390
+
+static int tap_length;
+static u8 tms_buffer[JLINK_TAP_BUFFER_SIZE];
+static u8 tdi_buffer[JLINK_TAP_BUFFER_SIZE];
+static u8 tdo_buffer[JLINK_TAP_BUFFER_SIZE];
+
+typedef struct
+{
+ int first; /* First bit position in tdo_buffer to read */
+ int length; /* Number of bits to read */
+ scan_command_t *command; /* Corresponding scan command */
+ u8 *buffer;
+} pending_scan_result_t;
+
+#define MAX_PENDING_SCAN_RESULTS 16
+
+static int pending_scan_results_length;
+static pending_scan_result_t pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
+
+static int last_tms;
+
+void jlink_tap_init()
+{
+ tap_length = 0;
+ pending_scan_results_length = 0;
+}
+
+void jlink_tap_ensure_space(int scans, int bits)
+{
+ int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
+ int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length;
+
+ if (scans > available_scans || bits > available_bits)
+ {
+ jlink_tap_execute();
+ }
+}
+
+void jlink_tap_append_step(int tms, int tdi)
+{
+ last_tms = tms;
+ int index = tap_length / 8;
+
+ if (index < JLINK_TAP_BUFFER_SIZE)
+ {
+ int bit_index = tap_length % 8;
+ u8 bit = 1 << bit_index;
+
+ if (tms)
+ {
+ tms_buffer[index] |= bit;
+ }
+ else
+ {
+ tms_buffer[index] &= ~bit;
+ }
+
+ if (tdi)
+ {
+ tdi_buffer[index] |= bit;
+ }
+ else
+ {
+ tdi_buffer[index] &= ~bit;
+ }
+
+ tap_length++;
+ }
+ else
+ {
+ LOG_ERROR("jlink_tap_append_step, overflow");
+ }
+}
+
+void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *command)
+{
+ pending_scan_result_t *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++)
+ {
+ jlink_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 jlink_tap_execute()
+{
+ int byte_length;
+ int tms_offset;
+ int tdi_offset;
+ int i;
+ int result;
+
+ if (tap_length > 0)
+ {
+ /* Pad last byte so that tap_length is divisible by 8 */
+ while (tap_length % 8 != 0)
+ {
+ /* More of the last TMS value keeps us in the same state,
+ * analogous to free-running JTAG interfaces. */
+ jlink_tap_append_step(last_tms, 0);
+ }
+
+ byte_length = tap_length / 8;
+
+ usb_out_buffer[0] = JLINK_TAP_SEQUENCE_COMMAND;
+ usb_out_buffer[1] = (tap_length >> 0) & 0xff;
+ usb_out_buffer[2] = (tap_length >> 8) & 0xff;
+
+ tms_offset = 3;
+ for (i = 0; i < byte_length; i++)
+ {
+ usb_out_buffer[tms_offset + i] = tms_buffer[i];
+ }
+
+ tdi_offset = tms_offset + byte_length;
+ for (i = 0; i < byte_length; i++)
+ {
+ usb_out_buffer[tdi_offset + i] = tdi_buffer[i];
+ }
+
+ result = jlink_usb_message(jlink_jtag_handle, 3 + 2 * byte_length, byte_length);
+
+ if (result == byte_length)
+ {
+ for (i = 0; i < byte_length; i++)
+ {
+ tdo_buffer[i] = usb_in_buffer[i];
+ }
+
+ for (i = 0; i < pending_scan_results_length; i++)
+ {
+ pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[i];
+ u8 *buffer = pending_scan_result->buffer;
+ int length = pending_scan_result->length;
+ int first = pending_scan_result->first;
+ scan_command_t *command = pending_scan_result->command;
+
+ /* Copy to buffer */
+ buf_set_buf(tdo_buffer, first, buffer, 0, length);
+
+ DEBUG_JTAG_IO("pending scan result, length = %d", length);
+
+#ifdef _DEBUG_USB_COMMS_
+ jlink_debug_buffer(buffer, byte_length);
+#endif
+
+ if (jtag_read_buffer(buffer, command) != ERROR_OK)
+ {
+ jlink_tap_init();
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ if (pending_scan_result->buffer != NULL)
+ {
+ free(pending_scan_result->buffer);
+ }
+ }
+ }
+ else
+ {
+ LOG_ERROR("jlink_tap_execute, wrong result %d, expected %d", result, byte_length);
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ jlink_tap_init();
+ }
+
+ return ERROR_OK;
+}
+
+/*****************************************************************************/
+/* JLink USB low-level functions */
+
+jlink_jtag_t* jlink_usb_open()
+{
+ struct usb_bus *busses;
+ struct usb_bus *bus;
+ struct usb_device *dev;
+
+ jlink_jtag_t *result;
+
+ result = (jlink_jtag_t*) malloc(sizeof(jlink_jtag_t));
+
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+
+ busses = usb_get_busses();
+
+ /* find jlink_jtag device in usb bus */
+
+ for (bus = busses; bus; bus = bus->next)
+ {
+ for (dev = bus->devices; dev; dev = dev->next)
+ {
+ if ((dev->descriptor.idVendor == VID) && (dev->descriptor.idProduct == PID))
+ {
+ result->usb_handle = usb_open(dev);
+
+ /* usb_set_configuration required under win32 */
+ usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
+ usb_claim_interface(result->usb_handle, 0);
+ usb_set_altinterface(result->usb_handle, 0);
+ return result;
+ }
+ }
+ }
+
+ free(result);
+ return NULL;
+}
+
+void jlink_usb_close(jlink_jtag_t *jlink_jtag)
+{
+ usb_close(jlink_jtag->usb_handle);
+ free(jlink_jtag);
+}
+
+/* Send a message and receive the reply. */
+int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length)
+{
+ int result;
+
+ result = jlink_usb_write(jlink_jtag, out_length);
+ if (result == out_length)
+ {
+ result = jlink_usb_read(jlink_jtag);
+ if (result == in_length)
+ {
+ return result;
+ }
+ else
+ {
+ LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result);
+ return -1;
+ }
+ }
+ else
+ {
+ LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result);
+ return -1;
+ }
+}
+
+/* Write data from out_buffer to USB. */
+int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
+{
+ int result;
+
+ if (out_length > JLINK_OUT_BUFFER_SIZE)
+ {
+ LOG_ERROR("jlink_jtag_write illegal out_length=%d (max=%d)", out_length, JLINK_OUT_BUFFER_SIZE);
+ return -1;
+ }
+
+ result = usb_bulk_write(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT, \
+ usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
+
+ DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d", out_length, result);
+
+#ifdef _DEBUG_USB_COMMS_
+ jlink_debug_buffer(usb_out_buffer, out_length);
+#endif
+ return result;
+}
+
+/* Read data from USB into in_buffer. */
+int jlink_usb_read(jlink_jtag_t *jlink_jtag)
+{
+ int result = usb_bulk_read(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT, \
+ usb_in_buffer, JLINK_IN_BUFFER_SIZE, JLINK_USB_TIMEOUT);
+
+ DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
+
+#ifdef _DEBUG_USB_COMMS_
+ jlink_debug_buffer(usb_in_buffer, result);
+#endif
+ return result;
+}
+
+#ifdef _DEBUG_USB_COMMS_
+#define BYTES_PER_LINE 16
+
+void jlink_debug_buffer(u8 *buffer, int length)
+{
+ char line[81];
+ char s[4];
+ int i;
+ int j;
+
+ for (i = 0; i < length; i += BYTES_PER_LINE)
+ {
+ snprintf(line, 5, "%04x", i);
+ for (j = i; j < i + BYTES_PER_LINE && j < length; j++)
+ {
+ snprintf(s, 4, " %02x", buffer[j]);
+ strcat(line, s);
+ }
+ LOG_DEBUG(line);
+ }
+}
+#endif
projects / openocd / commitdiff