--- /dev/null
+// vim:ts=4 sw=4:
+
+/***************************************************************************
+ * Copyright (C) 2009 by Dimitar Dimitrov <dinuxbg@gmail.com> *
+ * 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 <ctype.h>
+
+/* system includes */
+
+#include "log.h"
+
+/* enable this to debug communication
+ */
+#if 1
+#define _DEBUG_USB_COMMS_
+#define _DEBUG_JTAG_IO_
+#endif
+
+#ifdef _DEBUG_JTAG_IO_
+#define DEBUG_JTAG_IO(expr ...) LOG_DEBUG(expr)
+#else
+#define DEBUG_JTAG_IO(expr ...)
+#endif
+
+#define USB_VID 0x15ba
+#define USB_PID 0x001e
+
+#define ARMJTAGEW_EPT_BULK_OUT 0x01u
+#define ARMJTAGEW_EPT_BULK_IN 0x82u
+
+#define ARMJTAGEW_USB_TIMEOUT 2000
+
+#define ARMJTAGEW_IN_BUFFER_SIZE (4*1024)
+#define ARMJTAGEW_OUT_BUFFER_SIZE (4*1024)
+
+
+/* USB command request codes. */
+#define CMD_GET_VERSION 0x00
+#define CMD_SELECT_DPIMPL 0x10
+#define CMD_SET_TCK_FREQUENCY 0x11
+#define CMD_GET_TCK_FREQUENCY 0x12
+#define CMD_MEASURE_MAX_TCK_FREQ 0x15
+#define CMD_MEASURE_RTCK_RESPONSE 0x16
+#define CMD_TAP_SHIFT 0x17
+#define CMD_SET_TAPHW_STATE 0x20
+#define CMD_GET_TAPHW_STATE 0x21
+#define CMD_TGPWR_SETUP 0x22
+
+/* Global USB buffers */
+static u8 usb_in_buffer[ARMJTAGEW_IN_BUFFER_SIZE];
+static u8 usb_out_buffer[ARMJTAGEW_OUT_BUFFER_SIZE];
+
+/* External interface functions */
+int armjtagew_execute_queue(void);
+int armjtagew_speed(int speed);
+int armjtagew_khz(int khz, int *jtag_speed);
+int armjtagew_register_commands(struct command_context_s *cmd_ctx);
+int armjtagew_init(void);
+int armjtagew_quit(void);
+
+/* CLI command handler functions */
+int armjtagew_handle_armjtagew_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+
+/* Queue command functions */
+void armjtagew_end_state(tap_state_t state);
+void armjtagew_state_move(void);
+void armjtagew_path_move(int num_states, tap_state_t *path);
+void armjtagew_runtest(int num_cycles);
+void armjtagew_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+void armjtagew_reset(int trst, int srst);
+void armjtagew_simple_command(u8 command);
+int armjtagew_get_status(void);
+
+/* tap buffer functions */
+void armjtagew_tap_init(void);
+int armjtagew_tap_execute(void);
+void armjtagew_tap_ensure_space(int scans, int bits);
+void armjtagew_tap_append_step(int tms, int tdi);
+void armjtagew_tap_append_scan(int length, u8 *buffer, scan_command_t *command);
+
+/* ARM-JTAG-EW lowlevel functions */
+typedef struct armjtagew_jtag
+{
+ struct usb_dev_handle* usb_handle;
+} armjtagew_jtag_t;
+
+armjtagew_jtag_t *armjtagew_usb_open(void);
+void armjtagew_usb_close(armjtagew_jtag_t *armjtagew_jtag);
+int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length);
+int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length);
+int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length);
+
+/* helper functions */
+int armjtagew_get_version_info(void);
+
+#ifdef _DEBUG_USB_COMMS_
+void armjtagew_debug_buffer(u8 *buffer, int length);
+#endif
+
+armjtagew_jtag_t* armjtagew_jtag_handle;
+
+
+
+/***************************************************************************/
+/* External interface implementation */
+
+jtag_interface_t armjtagew_interface =
+{
+ .name = "arm-jtag-ew",
+ .execute_queue = armjtagew_execute_queue,
+ .speed = armjtagew_speed,
+ .khz = armjtagew_khz,
+ .register_commands = armjtagew_register_commands,
+ .init = armjtagew_init,
+ .quit = armjtagew_quit
+};
+
+
+int armjtagew_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)
+ {
+ armjtagew_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)
+ {
+ armjtagew_end_state(cmd->cmd.runtest->end_state);
+ }
+ armjtagew_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)
+ {
+ armjtagew_end_state(cmd->cmd.statemove->end_state);
+ }
+ armjtagew_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]);
+
+ armjtagew_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)
+ {
+ armjtagew_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_
+ armjtagew_debug_buffer(buffer, (scan_size + 7) / 8);
+#endif
+ type = jtag_scan_type(cmd->cmd.scan);
+ armjtagew_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);
+
+ armjtagew_tap_execute();
+
+ if (cmd->cmd.reset->trst == 1)
+ {
+ tap_set_state(TAP_RESET);
+ }
+ armjtagew_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+ break;
+
+ case JTAG_SLEEP:
+ DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
+ armjtagew_tap_execute();
+ jtag_sleep(cmd->cmd.sleep->us);
+ break;
+
+ default:
+ LOG_ERROR("BUG: unknown JTAG command type encountered");
+ exit(-1);
+ }
+ cmd = cmd->next;
+ }
+
+ return armjtagew_tap_execute();
+}
+
+
+/* Sets speed in kHz. */
+int armjtagew_speed(int speed)
+{
+ int result;
+ int speed_real;
+
+
+ usb_out_buffer[0] = CMD_SET_TCK_FREQUENCY;
+ buf_set_u32(usb_out_buffer+1, 0, 32, speed);
+
+ result = armjtagew_usb_message(armjtagew_jtag_handle, 4, 4);
+
+ if (result < 0)
+ {
+ LOG_ERROR("ARM-JTAG-EW setting speed failed (%d)", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ usb_out_buffer[0] = CMD_GET_TCK_FREQUENCY;
+ result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 4);
+ speed_real = (int)buf_get_u32(usb_in_buffer,0,32);
+ if(result < 0)
+ {
+ LOG_ERROR("ARM-JTAG-EW getting speed failed (%d)", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ else
+ {
+ LOG_INFO("Requested speed %dkHz, emulator reported %dkHz.", speed, speed_real);
+ }
+
+ return ERROR_OK;
+}
+
+
+int armjtagew_khz(int khz, int *jtag_speed)
+{
+ *jtag_speed = khz;
+
+ return ERROR_OK;
+}
+
+int armjtagew_register_commands(struct command_context_s *cmd_ctx)
+{
+ register_command(cmd_ctx, NULL, "armjtagew_info", armjtagew_handle_armjtagew_info_command, COMMAND_EXEC,
+ "query armjtagew info");
+ return ERROR_OK;
+}
+
+int armjtagew_init(void)
+{
+ int check_cnt;
+
+ armjtagew_jtag_handle = armjtagew_usb_open();
+
+ if (armjtagew_jtag_handle == 0)
+ {
+ LOG_ERROR("Cannot find ARM-JTAG-EW Interface! Please check connection and permissions.");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
+ check_cnt = 0;
+ while (check_cnt < 3)
+ {
+ if (armjtagew_get_version_info() == ERROR_OK)
+ {
+ /* attempt to get status */
+ armjtagew_get_status();
+ break;
+ }
+
+ check_cnt++;
+ }
+
+ if (check_cnt == 3)
+ {
+ LOG_INFO("ARM-JTAG-EW initial read failed, don't worry");
+ }
+
+ LOG_INFO("ARM-JTAG-EW JTAG Interface ready");
+
+ armjtagew_reset(0, 0);
+ armjtagew_tap_init();
+
+ return ERROR_OK;
+}
+
+int armjtagew_quit(void)
+{
+ armjtagew_usb_close(armjtagew_jtag_handle);
+ return ERROR_OK;
+}
+
+/***************************************************************************/
+/* Queue command implementations */
+
+void armjtagew_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);
+ }
+}
+
+/* Goes to the end state. */
+void armjtagew_state_move(void)
+{
+ int i;
+ int tms = 0;
+ u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
+
+ for (i = 0; i < 7; i++)
+ {
+ tms = (tms_scan >> i) & 1;
+ armjtagew_tap_append_step(tms, 0);
+ }
+
+ tap_set_state(tap_get_end_state());
+}
+
+void armjtagew_path_move(int num_states, tap_state_t *path)
+{
+ int i;
+
+ for (i = 0; i < num_states; i++)
+ {
+ /*
+ * TODO: The ARM-JTAG-EW hardware delays TDI with 3 TCK cycles when in RTCK mode.
+ * Either handle that here, or update the documentation with examples
+ * how to fix that in the configuration files.
+ */
+ if (path[i] == tap_state_transition(tap_get_state(), false))
+ {
+ armjtagew_tap_append_step(0, 0);
+ }
+ else if (path[i] == tap_state_transition(tap_get_state(), true))
+ {
+ armjtagew_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);
+ }
+
+ tap_set_state(path[i]);
+ }
+
+ tap_set_end_state(tap_get_state());
+}
+
+void armjtagew_runtest(int num_cycles)
+{
+ int i;
+
+ 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)
+ {
+ armjtagew_end_state(TAP_IDLE);
+ armjtagew_state_move();
+ }
+
+ /* execute num_cycles */
+ for (i = 0; i < num_cycles; i++)
+ {
+ armjtagew_tap_append_step(0, 0);
+ }
+
+ /* finish in end_state */
+ armjtagew_end_state(saved_end_state);
+ if (tap_get_state() != tap_get_end_state())
+ {
+ armjtagew_state_move();
+ }
+}
+
+void armjtagew_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
+{
+ tap_state_t saved_end_state;
+
+ armjtagew_tap_ensure_space(1, scan_size + 8);
+
+ saved_end_state = tap_get_end_state();
+
+ /* Move to appropriate scan state */
+ armjtagew_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
+
+ armjtagew_state_move();
+ armjtagew_end_state(saved_end_state);
+
+ /* Scan */
+ armjtagew_tap_append_scan(scan_size, buffer, command);
+
+ /* We are in Exit1, go to Pause */
+ armjtagew_tap_append_step(0, 0);
+
+ tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
+
+ if (tap_get_state() != tap_get_end_state())
+ {
+ armjtagew_state_move();
+ }
+}
+
+void armjtagew_reset(int trst, int srst)
+{
+ const u8 trst_mask = (1u<<5);
+ const u8 srst_mask = (1u<<6);
+ u8 val = 0;
+ u8 outp_en = 0;
+ u8 change_mask = 0;
+ int result;
+
+ LOG_DEBUG("trst: %i, srst: %i", trst, srst);
+
+ if (srst == 0)
+ {
+ val |= srst_mask;
+ outp_en &= ~srst_mask; /* tristate */
+ change_mask |= srst_mask;
+ }
+ else if (srst == 1)
+ {
+ val &= ~srst_mask;
+ outp_en |= srst_mask;
+ change_mask |= srst_mask;
+ }
+
+ if (trst == 0)
+ {
+ val |= trst_mask;
+ outp_en &= ~trst_mask; /* tristate */
+ change_mask |= trst_mask;
+ }
+ else if (trst == 1)
+ {
+ val &= ~trst_mask;
+ outp_en |= trst_mask;
+ change_mask |= trst_mask;
+ }
+
+ usb_out_buffer[0] = CMD_SET_TAPHW_STATE;
+ usb_out_buffer[1] = val;
+ usb_out_buffer[2] = outp_en;
+ usb_out_buffer[3] = change_mask;
+ result = armjtagew_usb_write(armjtagew_jtag_handle, 4);
+ if (result != 4)
+ {
+ LOG_ERROR("ARM-JTAG-EW TRST/SRST pin set failed failed (%d)", result);
+ }
+}
+
+
+int armjtagew_get_status(void)
+{
+ int result;
+
+ usb_out_buffer[0] = CMD_GET_TAPHW_STATE;
+ result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 12);
+
+ if (result == 0)
+ {
+ unsigned int u_tg = buf_get_u32(usb_in_buffer, 0, 16);
+ LOG_INFO("U_tg = %d mV, U_aux = %d mV, U_tgpwr = %d mV, I_tgpwr = %d mA, D1 = %d, Target power %s %s\n", \
+ buf_get_u32(usb_in_buffer + 0, 0, 16), \
+ buf_get_u32(usb_in_buffer + 2, 0, 16), \
+ buf_get_u32(usb_in_buffer + 4, 0, 16), \
+ buf_get_u32(usb_in_buffer + 6, 0, 16), \
+ usb_in_buffer[9], \
+ usb_in_buffer[11] ? "OVERCURRENT" : "OK", \
+ usb_in_buffer[10] ? "enabled" : "disabled");
+
+ if (u_tg < 1500)
+ {
+ LOG_ERROR("Vref too low. Check Target Power\n");
+ }
+ }
+ else
+ {
+ LOG_ERROR("ARM-JTAG-EW command CMD_GET_TAPHW_STATE failed (%d)\n", result);
+ }
+
+ return ERROR_OK;
+}
+
+int armjtagew_get_version_info(void)
+{
+ int result;
+ char sn[16];
+ char auxinfo[257];
+
+ /* query hardware version */
+ usb_out_buffer[0] = CMD_GET_VERSION;
+ result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 4+15+256);
+
+ if (result != 0)
+ {
+ LOG_ERROR("ARM-JTAG-EW command CMD_GET_VERSION failed (%d)\n", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+
+ memcpy(sn, usb_in_buffer+4, 15);
+ sn[15] = '\0';
+ memcpy(auxinfo, usb_in_buffer+4+15, 256);
+ auxinfo[256] = '\0';
+
+ LOG_INFO("ARM-JTAG-EW firmware version %d.%d, hardware revision %c, SN=%s, Additional info: %s", \
+ usb_in_buffer[1], usb_in_buffer[0], \
+ isgraph(usb_in_buffer[2]) ? usb_in_buffer[2] : 'X', \
+ sn, auxinfo);
+ return ERROR_OK;
+}
+
+int armjtagew_handle_armjtagew_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (armjtagew_get_version_info() == ERROR_OK)
+ {
+ /* attempt to get status */
+ armjtagew_get_status();
+ }
+
+ return ERROR_OK;
+}
+
+/***************************************************************************/
+/* ARM-JTAG-EW tap functions */
+
+/* 2048 is the max value we can use here */
+#define ARMJTAGEW_TAP_BUFFER_SIZE 2048
+
+static int tap_length;
+static u8 tms_buffer[ARMJTAGEW_TAP_BUFFER_SIZE];
+static u8 tdi_buffer[ARMJTAGEW_TAP_BUFFER_SIZE];
+static u8 tdo_buffer[ARMJTAGEW_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 256
+
+static int pending_scan_results_length;
+static pending_scan_result_t pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
+
+static int last_tms;
+
+void armjtagew_tap_init(void)
+{
+ tap_length = 0;
+ pending_scan_results_length = 0;
+}
+
+void armjtagew_tap_ensure_space(int scans, int bits)
+{
+ int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
+ int available_bits = ARMJTAGEW_TAP_BUFFER_SIZE * 8 - tap_length;
+
+ if (scans > available_scans || bits > available_bits)
+ {
+ armjtagew_tap_execute();
+ }
+}
+
+void armjtagew_tap_append_step(int tms, int tdi)
+{
+ last_tms = tms;
+ int index = tap_length / 8;
+
+ if (index < ARMJTAGEW_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("armjtagew_tap_append_step, overflow");
+ }
+}
+
+void armjtagew_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++)
+ {
+ armjtagew_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 armjtagew_tap_execute(void)
+{
+ 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. */
+ armjtagew_tap_append_step(last_tms, 0);
+ }
+
+ byte_length = tap_length / 8;
+
+ usb_out_buffer[0] = CMD_TAP_SHIFT;
+ buf_set_u32(usb_out_buffer+1, 0, 16, byte_length);
+
+ tms_offset = 3;
+ for (i = 0; i < byte_length; i++)
+ {
+ usb_out_buffer[tms_offset + i] = flip_u32(tms_buffer[i],8);
+ }
+
+ tdi_offset = tms_offset + byte_length;
+ for (i = 0; i < byte_length; i++)
+ {
+ usb_out_buffer[tdi_offset + i] = flip_u32(tdi_buffer[i],8);
+ }
+
+ result = armjtagew_usb_message(armjtagew_jtag_handle, 3 + 2 * byte_length, byte_length + 4);
+
+ if (result == 0)
+ {
+ int stat;
+
+ stat = (int)buf_get_u32(usb_in_buffer + byte_length, 0, 32);
+ if(stat) {
+ LOG_ERROR("armjtagew_tap_execute, emulator returned error code %d for a CMD_TAP_SHIFT command", stat);
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ for (i = 0; i < byte_length; i++)
+ {
+ tdo_buffer[i] = flip_u32(usb_in_buffer[i],8);
+ }
+
+ 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_
+ armjtagew_debug_buffer(buffer, byte_length);
+#endif
+
+ if (jtag_read_buffer(buffer, command) != ERROR_OK)
+ {
+ armjtagew_tap_init();
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ if (pending_scan_result->buffer != NULL)
+ {
+ free(pending_scan_result->buffer);
+ }
+ }
+ }
+ else
+ {
+ LOG_ERROR("armjtagew_tap_execute, wrong result %d, expected %d", result, byte_length);
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
+
+ armjtagew_tap_init();
+ }
+
+ return ERROR_OK;
+}
+
+/*****************************************************************************/
+/* JLink USB low-level functions */
+
+armjtagew_jtag_t* armjtagew_usb_open()
+{
+ struct usb_bus *busses;
+ struct usb_bus *bus;
+ struct usb_device *dev;
+
+ armjtagew_jtag_t *result;
+
+ result = (armjtagew_jtag_t*) malloc(sizeof(armjtagew_jtag_t));
+
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+
+ busses = usb_get_busses();
+
+ /* find armjtagew_jtag device in usb bus */
+
+ for (bus = busses; bus; bus = bus->next)
+ {
+ for (dev = bus->devices; dev; dev = dev->next)
+ {
+ if ((dev->descriptor.idVendor == USB_VID) && (dev->descriptor.idProduct == USB_PID))
+ {
+ result->usb_handle = usb_open(dev);
+
+#if 0
+ /* usb_set_configuration required under win32 */
+ usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
+#endif
+ usb_claim_interface(result->usb_handle, 0);
+
+#if 0
+ /*
+ * This makes problems under Mac OS X. And is not needed
+ * under Windows. Hopefully this will not break a linux build
+ */
+ usb_set_altinterface(result->usb_handle, 0);
+#endif
+ return result;
+ }
+ }
+ }
+
+ free(result);
+ return NULL;
+}
+
+void armjtagew_usb_close(armjtagew_jtag_t *armjtagew_jtag)
+{
+ usb_close(armjtagew_jtag->usb_handle);
+ free(armjtagew_jtag);
+}
+
+/* Send a message and receive the reply. */
+int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length)
+{
+ int result;
+
+ result = armjtagew_usb_write(armjtagew_jtag, out_length);
+ if (result == out_length)
+ {
+ result = armjtagew_usb_read(armjtagew_jtag, in_length);
+ if (result != in_length)
+ {
+ 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;
+ }
+ return 0;
+}
+
+/* Write data from out_buffer to USB. */
+int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length)
+{
+ int result;
+
+ if (out_length > ARMJTAGEW_OUT_BUFFER_SIZE)
+ {
+ LOG_ERROR("armjtagew_jtag_write illegal out_length=%d (max=%d)", out_length, ARMJTAGEW_OUT_BUFFER_SIZE);
+ return -1;
+ }
+
+ result = usb_bulk_write(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_OUT, \
+ (char*)usb_out_buffer, out_length, ARMJTAGEW_USB_TIMEOUT);
+
+ DEBUG_JTAG_IO("armjtagew_usb_write, out_length = %d, result = %d", out_length, result);
+
+#ifdef _DEBUG_USB_COMMS_
+ armjtagew_debug_buffer(usb_out_buffer, out_length);
+#endif
+ return result;
+}
+
+/* Read data from USB into in_buffer. */
+int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length)
+{
+ int result = usb_bulk_read(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_IN, \
+ (char*)usb_in_buffer, exp_in_length, ARMJTAGEW_USB_TIMEOUT);
+
+ DEBUG_JTAG_IO("armjtagew_usb_read, result = %d", result);
+
+#ifdef _DEBUG_USB_COMMS_
+ armjtagew_debug_buffer(usb_in_buffer, result);
+#endif
+ return result;
+}
+
+
+#ifdef _DEBUG_USB_COMMS_
+#define BYTES_PER_LINE 16
+
+void armjtagew_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