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// vim:ts=4 sw=4: |
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/*************************************************************************** |
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* Copyright (C) 2009 by Dimitar Dimitrov <dinuxbg@gmail.com> * |
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* based on Dominic Rath's and Benedikt Sauter's usbprog.c * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the * |
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* Free Software Foundation, Inc., * |
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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***************************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "replacements.h" |
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#include "jtag.h" |
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#include <usb.h> |
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#include <string.h> |
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#include <ctype.h> |
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/* system includes */ |
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#include "log.h" |
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/* enable this to debug communication |
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*/ |
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#if 1 |
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#define _DEBUG_USB_COMMS_ |
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#define _DEBUG_JTAG_IO_ |
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#endif |
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#ifdef _DEBUG_JTAG_IO_ |
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#define DEBUG_JTAG_IO(expr ...) LOG_DEBUG(expr) |
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#else |
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#define DEBUG_JTAG_IO(expr ...) |
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#endif |
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#define USB_VID 0x15ba |
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#define USB_PID 0x001e |
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#define ARMJTAGEW_EPT_BULK_OUT 0x01u |
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#define ARMJTAGEW_EPT_BULK_IN 0x82u |
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#define ARMJTAGEW_USB_TIMEOUT 2000 |
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#define ARMJTAGEW_IN_BUFFER_SIZE (4*1024) |
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#define ARMJTAGEW_OUT_BUFFER_SIZE (4*1024) |
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/* USB command request codes. */ |
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#define CMD_GET_VERSION 0x00 |
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#define CMD_SELECT_DPIMPL 0x10 |
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#define CMD_SET_TCK_FREQUENCY 0x11 |
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#define CMD_GET_TCK_FREQUENCY 0x12 |
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#define CMD_MEASURE_MAX_TCK_FREQ 0x15 |
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#define CMD_MEASURE_RTCK_RESPONSE 0x16 |
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#define CMD_TAP_SHIFT 0x17 |
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#define CMD_SET_TAPHW_STATE 0x20 |
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#define CMD_GET_TAPHW_STATE 0x21 |
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#define CMD_TGPWR_SETUP 0x22 |
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/* Global USB buffers */ |
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static u8 usb_in_buffer[ARMJTAGEW_IN_BUFFER_SIZE]; |
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static u8 usb_out_buffer[ARMJTAGEW_OUT_BUFFER_SIZE]; |
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/* External interface functions */ |
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int armjtagew_execute_queue(void); |
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int armjtagew_speed(int speed); |
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int armjtagew_khz(int khz, int *jtag_speed); |
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int armjtagew_register_commands(struct command_context_s *cmd_ctx); |
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int armjtagew_init(void); |
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int armjtagew_quit(void); |
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/* CLI command handler functions */ |
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int armjtagew_handle_armjtagew_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc); |
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/* Queue command functions */ |
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void armjtagew_end_state(tap_state_t state); |
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void armjtagew_state_move(void); |
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void armjtagew_path_move(int num_states, tap_state_t *path); |
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void armjtagew_runtest(int num_cycles); |
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void armjtagew_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command); |
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void armjtagew_reset(int trst, int srst); |
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void armjtagew_simple_command(u8 command); |
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int armjtagew_get_status(void); |
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/* tap buffer functions */ |
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void armjtagew_tap_init(void); |
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int armjtagew_tap_execute(void); |
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void armjtagew_tap_ensure_space(int scans, int bits); |
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void armjtagew_tap_append_step(int tms, int tdi); |
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void armjtagew_tap_append_scan(int length, u8 *buffer, scan_command_t *command); |
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/* ARM-JTAG-EW lowlevel functions */ |
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typedef struct armjtagew_jtag |
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{ |
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struct usb_dev_handle* usb_handle; |
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} armjtagew_jtag_t; |
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armjtagew_jtag_t *armjtagew_usb_open(void); |
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void armjtagew_usb_close(armjtagew_jtag_t *armjtagew_jtag); |
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int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length); |
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int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length); |
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int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length); |
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/* helper functions */ |
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int armjtagew_get_version_info(void); |
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#ifdef _DEBUG_USB_COMMS_ |
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void armjtagew_debug_buffer(u8 *buffer, int length); |
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#endif |
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armjtagew_jtag_t* armjtagew_jtag_handle; |
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/***************************************************************************/ |
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/* External interface implementation */ |
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jtag_interface_t armjtagew_interface = |
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{ |
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.name = "arm-jtag-ew", |
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.execute_queue = armjtagew_execute_queue, |
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.speed = armjtagew_speed, |
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.khz = armjtagew_khz, |
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.register_commands = armjtagew_register_commands, |
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.init = armjtagew_init, |
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.quit = armjtagew_quit |
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}; |
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int armjtagew_execute_queue(void) |
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{ |
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jtag_command_t *cmd = jtag_command_queue; |
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int scan_size; |
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enum scan_type type; |
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u8 *buffer; |
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while (cmd != NULL) |
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{ |
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switch (cmd->type) |
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{ |
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case JTAG_END_STATE: |
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DEBUG_JTAG_IO("end_state: %i", cmd->cmd.end_state->end_state); |
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if (cmd->cmd.end_state->end_state != -1) |
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{ |
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armjtagew_end_state(cmd->cmd.end_state->end_state); |
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} |
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break; |
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case JTAG_RUNTEST: |
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DEBUG_JTAG_IO( "runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, \ |
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cmd->cmd.runtest->end_state); |
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if (cmd->cmd.runtest->end_state != -1) |
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{ |
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armjtagew_end_state(cmd->cmd.runtest->end_state); |
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} |
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armjtagew_runtest(cmd->cmd.runtest->num_cycles); |
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break; |
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case JTAG_STATEMOVE: |
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DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state); |
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if (cmd->cmd.statemove->end_state != -1) |
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{ |
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armjtagew_end_state(cmd->cmd.statemove->end_state); |
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} |
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armjtagew_state_move(); |
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break; |
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case JTAG_PATHMOVE: |
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DEBUG_JTAG_IO("pathmove: %i states, end in %i", \ |
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cmd->cmd.pathmove->num_states, \ |
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cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]); |
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armjtagew_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path); |
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break; |
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case JTAG_SCAN: |
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DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state); |
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if (cmd->cmd.scan->end_state != -1) |
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{ |
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armjtagew_end_state(cmd->cmd.scan->end_state); |
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} |
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scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer); |
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DEBUG_JTAG_IO("scan input, length = %d", scan_size); |
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#ifdef _DEBUG_USB_COMMS_ |
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armjtagew_debug_buffer(buffer, (scan_size + 7) / 8); |
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#endif |
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type = jtag_scan_type(cmd->cmd.scan); |
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armjtagew_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan); |
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break; |
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case JTAG_RESET: |
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DEBUG_JTAG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst); |
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armjtagew_tap_execute(); |
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if (cmd->cmd.reset->trst == 1) |
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{ |
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tap_set_state(TAP_RESET); |
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} |
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armjtagew_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst); |
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break; |
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case JTAG_SLEEP: |
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DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us); |
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armjtagew_tap_execute(); |
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jtag_sleep(cmd->cmd.sleep->us); |
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break; |
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default: |
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LOG_ERROR("BUG: unknown JTAG command type encountered"); |
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exit(-1); |
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} |
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cmd = cmd->next; |
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} |
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return armjtagew_tap_execute(); |
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} |
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/* Sets speed in kHz. */ |
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int armjtagew_speed(int speed) |
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{ |
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int result; |
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int speed_real; |
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usb_out_buffer[0] = CMD_SET_TCK_FREQUENCY; |
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buf_set_u32(usb_out_buffer+1, 0, 32, speed); |
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result = armjtagew_usb_message(armjtagew_jtag_handle, 4, 4); |
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if (result < 0) |
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{ |
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LOG_ERROR("ARM-JTAG-EW setting speed failed (%d)", result); |
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return ERROR_JTAG_DEVICE_ERROR; |
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} |
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usb_out_buffer[0] = CMD_GET_TCK_FREQUENCY; |
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result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 4); |
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speed_real = (int)buf_get_u32(usb_in_buffer,0,32); |
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if(result < 0) |
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{ |
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LOG_ERROR("ARM-JTAG-EW getting speed failed (%d)", result); |
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return ERROR_JTAG_DEVICE_ERROR; |
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} |
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else |
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{ |
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LOG_INFO("Requested speed %dkHz, emulator reported %dkHz.", speed, speed_real); |
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} |
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return ERROR_OK; |
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} |
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int armjtagew_khz(int khz, int *jtag_speed) |
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{ |
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*jtag_speed = khz; |
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return ERROR_OK; |
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} |
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int armjtagew_register_commands(struct command_context_s *cmd_ctx) |
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{ |
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register_command(cmd_ctx, NULL, "armjtagew_info", armjtagew_handle_armjtagew_info_command, COMMAND_EXEC, |
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"query armjtagew info"); |
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return ERROR_OK; |
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} |
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int armjtagew_init(void) |
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{ |
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int check_cnt; |
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armjtagew_jtag_handle = armjtagew_usb_open(); |
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if (armjtagew_jtag_handle == 0) |
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{ |
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LOG_ERROR("Cannot find ARM-JTAG-EW Interface! Please check connection and permissions."); |
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return ERROR_JTAG_INIT_FAILED; |
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} |
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check_cnt = 0; |
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while (check_cnt < 3) |
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{ |
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if (armjtagew_get_version_info() == ERROR_OK) |
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{ |
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/* attempt to get status */ |
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armjtagew_get_status(); |
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break; |
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} |
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check_cnt++; |
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} |
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if (check_cnt == 3) |
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{ |
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LOG_INFO("ARM-JTAG-EW initial read failed, don't worry"); |
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} |
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LOG_INFO("ARM-JTAG-EW JTAG Interface ready"); |
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armjtagew_reset(0, 0); |
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armjtagew_tap_init(); |
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return ERROR_OK; |
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} |
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int armjtagew_quit(void) |
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{ |
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armjtagew_usb_close(armjtagew_jtag_handle); |
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return ERROR_OK; |
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} |
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/***************************************************************************/ |
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/* Queue command implementations */ |
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void armjtagew_end_state(tap_state_t state) |
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{ |
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if (tap_is_state_stable(state)) |
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{ |
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tap_set_end_state(state); |
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} |
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else |
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{ |
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LOG_ERROR("BUG: %i is not a valid end state", state); |
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exit(-1); |
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} |
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} |
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/* Goes to the end state. */ |
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void armjtagew_state_move(void) |
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{ |
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int i; |
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int tms = 0; |
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u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state()); |
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for (i = 0; i < 7; i++) |
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{ |
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tms = (tms_scan >> i) & 1; |
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armjtagew_tap_append_step(tms, 0); |
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} |
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tap_set_state(tap_get_end_state()); |
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} |
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void armjtagew_path_move(int num_states, tap_state_t *path) |
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{ |
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int i; |
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for (i = 0; i < num_states; i++) |
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{ |
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/* |
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* TODO: The ARM-JTAG-EW hardware delays TDI with 3 TCK cycles when in RTCK mode. |
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* Either handle that here, or update the documentation with examples |
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* how to fix that in the configuration files. |
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*/ |
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if (path[i] == tap_state_transition(tap_get_state(), false)) |
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{ |
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armjtagew_tap_append_step(0, 0); |
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} |
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else if (path[i] == tap_state_transition(tap_get_state(), true)) |
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{ |
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armjtagew_tap_append_step(1, 0); |
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} |
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else |
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{ |
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LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path[i])); |
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exit(-1); |
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} |
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tap_set_state(path[i]); |
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} |
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tap_set_end_state(tap_get_state()); |
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} |
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void armjtagew_runtest(int num_cycles) |
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{ |
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int i; |
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tap_state_t saved_end_state = tap_get_end_state(); |
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/* 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); |
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free(armjtagew_jtag); |
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} |
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/* Send a message and receive the reply. */ |
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int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length) |
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{ |
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int result; |
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result = armjtagew_usb_write(armjtagew_jtag, out_length); |
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if (result == out_length) |
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{ |
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result = armjtagew_usb_read(armjtagew_jtag, in_length); |
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if (result != in_length) |
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{ |
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LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result); |
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return -1; |
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} |
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} |
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else |
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{ |
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LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result); |
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return -1; |
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} |
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return 0; |
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} |
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/* Write data from out_buffer to USB. */ |
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int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length) |
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{ |
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int result; |
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if (out_length > ARMJTAGEW_OUT_BUFFER_SIZE) |
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{ |
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LOG_ERROR("armjtagew_jtag_write illegal out_length=%d (max=%d)", out_length, ARMJTAGEW_OUT_BUFFER_SIZE); |
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return -1; |
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} |
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result = usb_bulk_write(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_OUT, \ |
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(char*)usb_out_buffer, out_length, ARMJTAGEW_USB_TIMEOUT); |
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DEBUG_JTAG_IO("armjtagew_usb_write, out_length = %d, result = %d", out_length, result); |
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#ifdef _DEBUG_USB_COMMS_ |
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armjtagew_debug_buffer(usb_out_buffer, out_length); |
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#endif |
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return result; |
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} |
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/* Read data from USB into in_buffer. */ |
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int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length) |
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{ |
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int result = usb_bulk_read(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_IN, \ |
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(char*)usb_in_buffer, exp_in_length, ARMJTAGEW_USB_TIMEOUT); |
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DEBUG_JTAG_IO("armjtagew_usb_read, result = %d", result); |
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#ifdef _DEBUG_USB_COMMS_ |
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armjtagew_debug_buffer(usb_in_buffer, result); |
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#endif |
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return result; |
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} |
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#ifdef _DEBUG_USB_COMMS_ |
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#define BYTES_PER_LINE 16 |
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void armjtagew_debug_buffer(u8 *buffer, int length) |
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{ |
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char line[81]; |
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|
char s[4]; |
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|
int i; |
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int j; |
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for (i = 0; i < length; i += BYTES_PER_LINE) |
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{ |
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snprintf(line, 5, "%04x", i); |
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for (j = i; j < i + BYTES_PER_LINE && j < length; j++) |
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|
{ |
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|
snprintf(s, 4, " %02x", buffer[j]); |
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strcat(line, s); |
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} |
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|
LOG_DEBUG(line); |
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} |
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} |
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#endif |
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duane
13 years ago