move jtag drivers to src/jtag/drivers

Moves JTAG interface drivers to src/jtag/drivers/,
Adds src/jtag/drivers/Makefile.am.
Builds libocdjtagdrivers.la.

Flattens the rlink driver files into the drivers/ directory, adding
the 'rlink_' prefix or '.rlink' suffix as appropriate.

1 files changed, 0 insertions, 1903 deletions

diff --git a/src/jtag/vsllink.c b/src/jtag/vsllink.c
deleted file mode 100644
index cc3308f5..00000000
--- a/src/jtag/vsllink.c
+++ /dev/null
@@ -1,1903 +0,0 @@
-/***************************************************************************
- *   Copyright (C) 2009 by Simon Qian <SimonQian@SimonQian.com>            *
- *                                                                         *
- *   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.             *
- ***************************************************************************/
-
-/* Versaloon is a programming tool for multiple MCUs.
- * OpenOCD and MSP430 supports are distributed under GPLv2.
- * You can find it at http://www.SimonQian.com/en/Versaloon.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "interface.h"
-#include "commands.h"
-#include "usb_common.h"
-
-//#define _VSLLINK_IN_DEBUG_MODE_
-
-#define VSLLINK_MODE_NORMAL			0
-#define VSLLINK_MODE_DMA			1
-
-static uint16_t vsllink_usb_vid;
-static uint16_t vsllink_usb_pid;
-static uint8_t vsllink_usb_bulkout;
-static uint8_t vsllink_usb_bulkin;
-static uint8_t vsllink_usb_interface;
-static uint8_t vsllink_mode = VSLLINK_MODE_NORMAL;
-static int VSLLINK_USB_TIMEOUT = 10000;
-
-static int VSLLINK_BufferSize = 1024;
-
-/* Global USB buffers */
-static int vsllink_usb_out_buffer_idx;
-static int vsllink_usb_in_want_length;
-static uint8_t* vsllink_usb_in_buffer = NULL;
-static uint8_t* vsllink_usb_out_buffer = NULL;
-
-/* Constants for VSLLink command */
-#define VSLLINK_CMD_CONN			0x80
-#define VSLLINK_CMD_DISCONN			0x81
-#define VSLLINK_CMD_SET_SPEED		0x82
-#define VSLLINK_CMD_SET_PORT		0x90
-#define VSLLINK_CMD_GET_PORT		0x91
-#define VSLLINK_CMD_SET_PORTDIR		0x92
-#define VSLLINK_CMD_HW_JTAGSEQCMD	0xA0
-#define VSLLINK_CMD_HW_JTAGHLCMD	0xA1
-#define VSLLINK_CMD_HW_SWDCMD		0xA2
-#define VSLLINK_CMD_HW_JTAGRAWCMD	0xA3
-
-#define VSLLINK_CMDJTAGSEQ_TMSBYTE	0x00
-#define VSLLINK_CMDJTAGSEQ_TMSCLOCK	0x40
-#define VSLLINK_CMDJTAGSEQ_SCAN		0x80
-
-#define VSLLINK_CMDJTAGSEQ_CMDMSK	0xC0
-#define VSLLINK_CMDJTAGSEQ_LENMSK	0x3F
-
-#define JTAG_PINMSK_SRST			(1 << 0)
-#define JTAG_PINMSK_TRST			(1 << 1)
-#define JTAG_PINMSK_USR1			(1 << 2)
-#define JTAG_PINMSK_USR2			(1 << 3)
-#define JTAG_PINMSK_TCK				(1 << 4)
-#define JTAG_PINMSK_TMS				(1 << 5)
-#define JTAG_PINMSK_TDI				(1 << 6)
-#define JTAG_PINMSK_TDO				(1 << 7)
-
-
-#define VSLLINK_TAP_MOVE(from, to)	VSLLINK_tap_move[tap_move_ndx(from)][tap_move_ndx(to)]
-
-/* VSLLINK_tap_move[i][j]: tap movement command to go from state i to state j
- * 0: Test-Logic-Reset
- * 1: Run-Test/Idle
- * 2: Shift-DR
- * 3: Pause-DR
- * 4: Shift-IR
- * 5: Pause-IR
- *
- * SD->SD and SI->SI have to be caught in interface specific code
- */
-static uint8_t VSLLINK_tap_move[6][6] =
-{
-/*	  TLR   RTI   SD    PD    SI    PI             */
-	{0xff, 0x7f, 0x2f, 0x0a, 0x37, 0x16},	/* TLR */
-	{0xff, 0x00, 0x45, 0x05, 0x4b, 0x0b},	/* RTI */
-	{0xff, 0x61, 0x00, 0x01, 0x0f, 0x2f},	/* SD  */
-	{0xfe, 0x60, 0x40, 0x5c, 0x3c, 0x5e},	/* PD  */
-	{0xff, 0x61, 0x07, 0x17, 0x00, 0x01},	/* SI  */
-	{0xfe, 0x60, 0x38, 0x5c, 0x40, 0x5e}	/* PI  */
-};
-
-struct insert_insignificant_operation {
-	unsigned char insert_value;
-	unsigned char insert_position;
-};
-
-static struct insert_insignificant_operation VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[6][6] =
-{
-/*	 stuff	offset   */
-	{/*	TLR	*/
-	{1,		0,},	/* TLR */
-	{1,		0,},	/* RTI */
-	{1,		0,},	/* SD  */
-	{1,		0,},	/* PD  */
-	{1,		0,},	/* SI  */
-	{1,		0,}},	/* PI  */
-	{/*	RTI	*/
-	{1,		0,},	/* TLR */
-	{0,		0,},	/* RTI */
-	{0,		4,},	/* SD  */
-	{0,		7,},	/* PD  */
-	{0,		5,},	/* SI  */
-	{0,		7,}},	/* PI  */
-	{/*	SD	*/
-	{0,		0,},	/* TLR */
-	{0,		0,},	/* RTI */
-	{0,		0,},	/* SD  */
-	{0,		0,},	/* PD  */
-	{0,		0,},	/* SI  */
-	{0,		0,}},	/* PI  */
-	{/*	PD	*/
-	{0,		0,},	/* TLR */
-	{0,		0,},	/* RTI */
-	{0,		0,},	/* SD  */
-	{0,		0,},	/* PD  */
-	{0,		0,},	/* SI  */
-	{0,		0,}},	/* PI  */
-	{/*	SI	*/
-	{0,		0,},	/* TLR */
-	{0,		0,},	/* RTI */
-	{0,		0,},	/* SD  */
-	{0,		0,},	/* PD  */
-	{0,		0,},	/* SI  */
-	{0,		0,}},	/* PI  */
-	{/*	PI	*/
-	{0,		0,},	/* TLR */
-	{0,		0,},	/* RTI */
-	{0,		0,},	/* SD  */
-	{0,		0,},	/* PD  */
-	{0,		0,},	/* SI  */
-	{0,		0,}},	/* PI  */
-};
-
-static uint8_t VSLLINK_BIT_MSK[8] =
-{
-	0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f
-};
-
-struct pending_scan_result {
-	int offset;
-	int length; /* Number of bits to read */
-	struct scan_command *command; /* Corresponding scan command */
-	uint8_t *buffer;
-};
-
-#define MAX_PENDING_SCAN_RESULTS 256
-
-static int pending_scan_results_length;
-static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
-
-/* Queue command functions */
-static void vsllink_end_state(tap_state_t state);
-static void vsllink_state_move_dma(void);
-static void vsllink_state_move_normal(void);
-static void (*vsllink_state_move)(void);
-static void vsllink_path_move_dma(int num_states, tap_state_t *path);
-static void vsllink_path_move_normal(int num_states, tap_state_t *path);
-static void (*vsllink_path_move)(int num_states, tap_state_t *path);
-static void vsllink_runtest(int num_cycles);
-static void vsllink_stableclocks_dma(int num_cycles, int tms);
-static void vsllink_stableclocks_normal(int num_cycles, int tms);
-static void (*vsllink_stableclocks)(int num_cycles, int tms);
-static void vsllink_scan_dma(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command);
-static void vsllink_scan_normal(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command);
-static void (*vsllink_scan)(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command);
-static void vsllink_reset(int trst, int srst);
-static void vsllink_simple_command(uint8_t command);
-static int vsllink_connect(void);
-static int vsllink_disconnect(void);
-
-/* VSLLink tap buffer functions */
-static void vsllink_tap_append_step(int tms, int tdi);
-static void vsllink_tap_init_dma(void);
-static void vsllink_tap_init_normal(void);
-static void (*vsllink_tap_init)(void);
-static int vsllink_tap_execute_dma(void);
-static int vsllink_tap_execute_normal(void);
-static int (*vsllink_tap_execute)(void);
-static void vsllink_tap_ensure_space_dma(int scans, int length);
-static void vsllink_tap_ensure_space_normal(int scans, int length);
-static void (*vsllink_tap_ensure_space)(int scans, int length);
-static void vsllink_tap_append_scan_dma(int length, uint8_t *buffer, struct scan_command *command);
-static void vsllink_tap_append_scan_normal(int length, uint8_t *buffer, struct scan_command *command, int offset);
-
-/* VSLLink lowlevel functions */
-struct vsllink {
-	struct usb_dev_handle* usb_handle;
-};
-
-static struct vsllink *vsllink_usb_open(void);
-static void vsllink_usb_close(struct vsllink *vsllink);
-static int vsllink_usb_message(struct vsllink *vsllink, int out_length, int in_length);
-static int vsllink_usb_write(struct vsllink *vsllink, int out_length);
-static int vsllink_usb_read(struct vsllink *vsllink);
-
-#if defined _DEBUG_USB_COMMS_ || defined _DEBUG_JTAG_IO_
-static void vsllink_debug_buffer(uint8_t *buffer, int length);
-#endif
-
-static int vsllink_tms_data_len = 0;
-static uint8_t* vsllink_tms_cmd_pos;
-
-static int tap_length = 0;
-static int tap_buffer_size = 0;
-static uint8_t *tms_buffer = NULL;
-static uint8_t *tdi_buffer = NULL;
-static uint8_t *tdo_buffer = NULL;
-static int last_tms;
-
-static struct vsllink* vsllink_handle = NULL;
-
-static void reset_command_pointer(void)
-{
-	if (vsllink_mode == VSLLINK_MODE_NORMAL)
-	{
-		vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGSEQCMD;
-		vsllink_usb_out_buffer_idx = 3;
-	}
-	else
-	{
-		tap_length = 0;
-	}
-}
-
-static int vsllink_execute_queue(void)
-{
-	struct jtag_command *cmd = jtag_command_queue;
-	int scan_size;
-	enum scan_type type;
-	uint8_t *buffer;
-
-	DEBUG_JTAG_IO("--------------------------------- vsllink -------------------------------------");
-
-	reset_command_pointer();
-	while (cmd != NULL)
-	{
-		switch (cmd->type)
-		{
-			case JTAG_RUNTEST:
-				DEBUG_JTAG_IO("runtest %i cycles, end in %s", cmd->cmd.runtest->num_cycles, \
-					tap_state_name(cmd->cmd.runtest->end_state));
-
-				vsllink_end_state(cmd->cmd.runtest->end_state);
-				vsllink_runtest(cmd->cmd.runtest->num_cycles);
-				break;
-
-			case JTAG_STATEMOVE:
-				DEBUG_JTAG_IO("statemove end in %s", tap_state_name(cmd->cmd.statemove->end_state));
-
-				vsllink_end_state(cmd->cmd.statemove->end_state);
-				vsllink_state_move();
-				break;
-
-			case JTAG_PATHMOVE:
-				DEBUG_JTAG_IO("pathmove: %i states, end in %s", \
-					cmd->cmd.pathmove->num_states, \
-					tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
-
-				vsllink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
-				break;
-
-			case JTAG_SCAN:
-				vsllink_end_state(cmd->cmd.scan->end_state);
-
-				scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
-				if (cmd->cmd.scan->ir_scan)
-				{
-					DEBUG_JTAG_IO("JTAG Scan write IR(%d bits), end in %s:", scan_size, tap_state_name(cmd->cmd.scan->end_state));
-				}
-				else
-				{
-					DEBUG_JTAG_IO("JTAG Scan write DR(%d bits), end in %s:", scan_size, tap_state_name(cmd->cmd.scan->end_state));
-				}
-
-#ifdef _DEBUG_JTAG_IO_
-				vsllink_debug_buffer(buffer, (scan_size + 7) >> 3);
-#endif
-
-				type = jtag_scan_type(cmd->cmd.scan);
-
-				vsllink_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);
-
-				vsllink_tap_execute();
-
-				if (cmd->cmd.reset->trst == 1)
-				{
-					tap_set_state(TAP_RESET);
-				}
-				vsllink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-				break;
-
-			case JTAG_SLEEP:
-				DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
-				vsllink_tap_execute();
-				jtag_sleep(cmd->cmd.sleep->us);
-				break;
-
-			case JTAG_STABLECLOCKS:
-				DEBUG_JTAG_IO("add %d clocks", cmd->cmd.stableclocks->num_cycles);
-				switch (tap_get_state())
-				{
-				case TAP_RESET:
-					// tms should be '1' to stay in TAP_RESET mode
-					scan_size = 1;
-					break;
-				case TAP_DRSHIFT:
-				case TAP_IDLE:
-				case TAP_DRPAUSE:
-				case TAP_IRSHIFT:
-				case TAP_IRPAUSE:
-					// in other mode, tms should be '0'
-					scan_size = 0;
-					break;			/* above stable states are OK */
-				default:
-					 LOG_ERROR("jtag_add_clocks() was called with TAP in non-stable state \"%s\"",
-							 tap_state_name(tap_get_state()));
-					 exit(-1);
-				}
-				vsllink_stableclocks(cmd->cmd.stableclocks->num_cycles, scan_size);
-				break;
-
-			default:
-				LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
-				exit(-1);
-		}
-		cmd = cmd->next;
-	}
-
-	return vsllink_tap_execute();
-}
-
-static int vsllink_speed(int speed)
-{
-	int result;
-
-	vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_SPEED;
-	vsllink_usb_out_buffer[1] = (speed >> 0) & 0xff;
-	vsllink_usb_out_buffer[2] = (speed >> 8) & 0xFF;
-
-	result = vsllink_usb_write(vsllink_handle, 3);
-
-	if (result == 3)
-	{
-		return ERROR_OK;
-	}
-	else
-	{
-		LOG_ERROR("VSLLink setting speed failed (%d)", result);
-		return ERROR_JTAG_DEVICE_ERROR;
-	}
-
-	return ERROR_OK;
-}
-
-static int vsllink_khz(int khz, int *jtag_speed)
-{
-	*jtag_speed = khz;
-
-	return ERROR_OK;
-}
-
-static int vsllink_speed_div(int jtag_speed, int *khz)
-{
-	*khz = jtag_speed;
-
-	return ERROR_OK;
-}
-
-static int vsllink_init(void)
-{
-	int check_cnt, to_tmp;
-	int result;
-	char version_str[100];
-
-	vsllink_usb_in_buffer = malloc(VSLLINK_BufferSize);
-	vsllink_usb_out_buffer = malloc(VSLLINK_BufferSize);
-	if ((vsllink_usb_in_buffer == NULL) || (vsllink_usb_out_buffer == NULL))
-	{
-		LOG_ERROR("Not enough memory");
-		exit(-1);
-	}
-
-	vsllink_handle = vsllink_usb_open();
-
-	if (vsllink_handle == 0)
-	{
-		LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
-		return ERROR_JTAG_INIT_FAILED;
-	}
-	LOG_DEBUG("vsllink found on %04X:%04X", vsllink_usb_vid, vsllink_usb_pid);
-
-	to_tmp = VSLLINK_USB_TIMEOUT;
-	VSLLINK_USB_TIMEOUT = 100;
-	check_cnt = 0;
-	while (check_cnt < 5)
-	{
-		vsllink_simple_command(0x00);
-		result = vsllink_usb_read(vsllink_handle);
-
-		if (result > 2)
-		{
-			vsllink_usb_in_buffer[result] = 0;
-			VSLLINK_BufferSize = vsllink_usb_in_buffer[0] + (vsllink_usb_in_buffer[1] << 8);
-			strncpy(version_str, (char *)vsllink_usb_in_buffer + 2, sizeof(version_str));
-			LOG_INFO("%s", version_str);
-
-			// free the pre-alloc memroy
-			free(vsllink_usb_in_buffer);
-			free(vsllink_usb_out_buffer);
-			vsllink_usb_in_buffer = NULL;
-			vsllink_usb_out_buffer = NULL;
-
-			// alloc new memory
-			vsllink_usb_in_buffer = malloc(VSLLINK_BufferSize);
-			vsllink_usb_out_buffer = malloc(VSLLINK_BufferSize);
-			if ((vsllink_usb_in_buffer == NULL) || (vsllink_usb_out_buffer == NULL))
-			{
-				LOG_ERROR("Not enough memory");
-				exit(-1);
-			}
-			else
-			{
-				LOG_INFO("buffer size for USB is %d bytes", VSLLINK_BufferSize);
-			}
-			// alloc memory for dma mode
-			if (vsllink_mode == VSLLINK_MODE_DMA)
-			{
-				tap_buffer_size = (VSLLINK_BufferSize - 3) / 2;
-				tms_buffer = (uint8_t*)malloc(tap_buffer_size);
-				tdi_buffer = (uint8_t*)malloc(tap_buffer_size);
-				tdo_buffer = (uint8_t*)malloc(tap_buffer_size);
-				if ((tms_buffer == NULL) || (tdi_buffer == NULL) || (tdo_buffer == NULL))
-				{
-					LOG_ERROR("Not enough memory");
-					exit(-1);
-				}
-			}
-			break;
-		}
-		vsllink_simple_command(VSLLINK_CMD_DISCONN);
-		check_cnt++;
-	}
-	if (check_cnt == 3)
-	{
-		// It's dangerout to proced
-		LOG_ERROR("VSLLink initial failed");
-		exit(-1);
-	}
-	VSLLINK_USB_TIMEOUT = to_tmp;
-
-	// connect to vsllink
-	vsllink_connect();
-	// initialize function pointers
-	if (vsllink_mode == VSLLINK_MODE_NORMAL)
-	{
-		// normal mode
-		vsllink_state_move = vsllink_state_move_normal;
-		vsllink_path_move = vsllink_path_move_normal;
-		vsllink_stableclocks = vsllink_stableclocks_normal;
-		vsllink_scan = vsllink_scan_normal;
-
-		vsllink_tap_init = vsllink_tap_init_normal;
-		vsllink_tap_execute = vsllink_tap_execute_normal;
-		vsllink_tap_ensure_space = vsllink_tap_ensure_space_normal;
-
-		LOG_INFO("vsllink run in NORMAL mode");
-	}
-	else
-	{
-		// dma mode
-		vsllink_state_move = vsllink_state_move_dma;
-		vsllink_path_move = vsllink_path_move_dma;
-		vsllink_stableclocks = vsllink_stableclocks_dma;
-		vsllink_scan = vsllink_scan_dma;
-
-		vsllink_tap_init = vsllink_tap_init_dma;
-		vsllink_tap_execute = vsllink_tap_execute_dma;
-		vsllink_tap_ensure_space = vsllink_tap_ensure_space_dma;
-
-		LOG_INFO("vsllink run in DMA mode");
-	}
-
-	// Set SRST and TRST to output, Set USR1 and USR2 to input
-	vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_PORTDIR;
-	vsllink_usb_out_buffer[1] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST | JTAG_PINMSK_USR1 | JTAG_PINMSK_USR2;
-	vsllink_usb_out_buffer[2] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST;
-	if (vsllink_usb_write(vsllink_handle, 3) != 3)
-	{
-		LOG_ERROR("VSLLink USB send data error");
-		exit(-1);
-	}
-
-	vsllink_reset(0, 0);
-
-	LOG_INFO("VSLLink JTAG Interface ready");
-
-	vsllink_tap_init();
-
-	return ERROR_OK;
-}
-
-static int vsllink_quit(void)
-{
-	if ((vsllink_usb_in_buffer != NULL) && (vsllink_usb_out_buffer != NULL))
-	{
-		// Set all pins to input
-		vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_PORTDIR;
-		vsllink_usb_out_buffer[1] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST | JTAG_PINMSK_USR1 | JTAG_PINMSK_USR2;
-		vsllink_usb_out_buffer[2] = 0;
-		if (vsllink_usb_write(vsllink_handle, 3) != 3)
-		{
-			LOG_ERROR("VSLLink USB send data error");
-			exit(-1);
-		}
-
-		// disconnect
-		vsllink_disconnect();
-		vsllink_usb_close(vsllink_handle);
-		vsllink_handle = NULL;
-	}
-
-	if (vsllink_usb_in_buffer != NULL)
-	{
-		free(vsllink_usb_in_buffer);
-		vsllink_usb_in_buffer = NULL;
-	}
-	if (vsllink_usb_out_buffer != NULL)
-	{
-		free(vsllink_usb_out_buffer);
-		vsllink_usb_out_buffer = NULL;
-	}
-
-	return ERROR_OK;
-}
-
-/***************************************************************************/
-/* Queue command implementations */
-static int vsllink_disconnect(void)
-{
-	vsllink_simple_command(VSLLINK_CMD_DISCONN);
-	return ERROR_OK;
-}
-
-static int vsllink_connect(void)
-{
-	char vsllink_str[100];
-
-	vsllink_usb_out_buffer[0] = VSLLINK_CMD_CONN;
-	vsllink_usb_out_buffer[1] = vsllink_mode;
-	vsllink_usb_message(vsllink_handle, 2, 0);
-	if (vsllink_usb_read(vsllink_handle) > 2)
-	{
-		strncpy(vsllink_str, (char *)vsllink_usb_in_buffer + 2, sizeof(vsllink_str));
-		LOG_INFO("%s", vsllink_str);
-	}
-
-	return ERROR_OK;
-}
-
-// when vsllink_tms_data_len > 0, vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] is the byte that need to be appended.
-// length of VSLLINK_CMDJTAGSEQ_TMSBYTE has been set, no need to set it here.
-static void vsllink_append_tms(void)
-{
-	uint8_t tms_scan = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
-	uint16_t tms2;
-	struct insert_insignificant_operation *insert = \
-		&VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())];
-
-	if (((tap_get_state() != TAP_RESET) && (tap_get_state() != TAP_IDLE) && (tap_get_state() != TAP_DRPAUSE) && (tap_get_state() != TAP_IRPAUSE)) || \
-			(vsllink_tms_data_len <= 0) || (vsllink_tms_data_len >= 8) || \
-			(vsllink_tms_cmd_pos == NULL))
-	{
-		LOG_ERROR("There MUST be some bugs in the driver");
-		exit(-1);
-	}
-
-	tms2 = (tms_scan & VSLLINK_BIT_MSK[insert->insert_position]) << \
-				vsllink_tms_data_len;
-	if (insert->insert_value == 1)
-	{
-		tms2 |= VSLLINK_BIT_MSK[8 - vsllink_tms_data_len] << \
-				(vsllink_tms_data_len + insert->insert_position);
-	}
-	tms2 |= (tms_scan >> insert->insert_position) << \
-				(8 + insert->insert_position);
-
-	vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (tms2 >> 0) & 0xff;
-	vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms2 >> 8) & 0xff;
-
-	vsllink_tms_data_len = 0;
-	vsllink_tms_cmd_pos = NULL;
-}
-
-static void vsllink_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. */
-static void vsllink_state_move_normal(void)
-{
-	if (vsllink_tms_data_len > 0)
-	{
-		vsllink_append_tms();
-	}
-	else
-	{
-		vsllink_tap_ensure_space(0, 2);
-
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE;
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
-	}
-
-	tap_set_state(tap_get_end_state());
-}
-static void vsllink_state_move_dma(void)
-{
-	int i, insert_length = (tap_length % 8) ? (8 - (tap_length % 8)) : 0;
-	struct insert_insignificant_operation *insert = \
-		&VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())];
-	uint8_t tms_scan = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
-
-	if (tap_get_state() == TAP_RESET)
-	{
-		vsllink_tap_ensure_space(0, 8);
-
-		for (i = 0; i < 8; i++)
-		{
-			vsllink_tap_append_step(1, 0);
-		}
-	}
-
-	if (insert_length > 0)
-	{
-		vsllink_tap_ensure_space(0, 16);
-
-		for (i = 0; i < insert->insert_position; i++)
-		{
-			vsllink_tap_append_step((tms_scan >> i) & 1, 0);
-		}
-		for (i = 0; i < insert_length; i++)
-		{
-			vsllink_tap_append_step(insert->insert_value, 0);
-		}
-		for (i = insert->insert_position; i < 8; i++)
-		{
-			vsllink_tap_append_step((tms_scan >> i) & 1, 0);
-		}
-	}
-	else
-	{
-		vsllink_tap_ensure_space(0, 8);
-
-		for (i = 0; i < 8; i++)
-		{
-			vsllink_tap_append_step((tms_scan >> i) & 1, 0);
-		}
-	}
-
-	tap_set_state(tap_get_end_state());
-}
-
-// write tms from current vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx]
-static void vsllink_add_path(int start, int num, tap_state_t *path)
-{
-	int i;
-
-	for (i = start; i < (start + num); i++)
-	{
-		if ((i & 7) == 0)
-		{
-			if (i > 0)
-			{
-				vsllink_usb_out_buffer_idx++;
-			}
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = 0;
-		}
-
-		if (path[i - start] == tap_state_transition(tap_get_state(), true))
-		{
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] |= 1 << (i & 7);
-		}
-		else if (path[i - start] == tap_state_transition(tap_get_state(), false))
-		{
-			// nothing to do
-		}
-		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 - start]);
-	}
-	if ((i > 0) && ((i & 7) == 0))
-	{
-		vsllink_usb_out_buffer_idx++;
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = 0;
-	}
-
-	tap_set_end_state(tap_get_state());
-}
-
-static void vsllink_path_move_normal(int num_states, tap_state_t *path)
-{
-	int i, tms_len, tms_cmd_pos, path_idx = 0;
-
-	if (vsllink_tms_data_len > 0)
-	{
-		// there are vsllink_tms_data_len more tms bits to be shifted
-		// so there are vsllink_tms_data_len + num_states tms bits in all
-		tms_len = vsllink_tms_data_len + num_states;
-		if (tms_len <= 16)
-		{
-			// merge into last tms shift
-			if (tms_len < 8)
-			{
-				// just append tms data to the last tms byte
-				vsllink_add_path(vsllink_tms_data_len, num_states, path);
-			}
-			else if (tms_len == 8)
-			{
-				// end last tms shift command
-				(*vsllink_tms_cmd_pos)--;
-				vsllink_add_path(vsllink_tms_data_len, num_states, path);
-			}
-			else if (tms_len < 16)
-			{
-				if ((*vsllink_tms_cmd_pos & VSLLINK_CMDJTAGSEQ_LENMSK) < VSLLINK_CMDJTAGSEQ_LENMSK)
-				{
-					// every tms shift command can contain VSLLINK_CMDJTAGSEQ_LENMSK + 1 bytes in most
-					// there is enought tms length in the current tms shift command
-					(*vsllink_tms_cmd_pos)++;
-					vsllink_add_path(vsllink_tms_data_len, num_states, path);
-				}
-				else
-				{
-					// every tms shift command can contain VSLLINK_CMDJTAGSEQ_LENMSK + 1 bytes in most
-					// not enough tms length in the current tms shift command
-					// so a new command should be added
-					// first decrease byte length of last tms shift command
-					(*vsllink_tms_cmd_pos)--;
-					// append tms data to the last tms byte
-					vsllink_add_path(vsllink_tms_data_len, 8 - vsllink_tms_data_len, path);
-					path += 8 - vsllink_tms_data_len;
-					// add new command(3 bytes)
-					vsllink_tap_ensure_space(0, 3);
-					vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | 1;
-					vsllink_add_path(0, num_states - (8 - vsllink_tms_data_len), path);
-				}
-			}
-			else if (tms_len == 16)
-			{
-				// end last tms shift command
-				vsllink_add_path(vsllink_tms_data_len, num_states, path);
-			}
-
-			vsllink_tms_data_len = (vsllink_tms_data_len + num_states) & 7;
-			if (vsllink_tms_data_len == 0)
-			{
-				vsllink_tms_cmd_pos = NULL;
-			}
-			num_states = 0;
-		}
-		else
-		{
-			vsllink_add_path(vsllink_tms_data_len, 16 - vsllink_tms_data_len, path);
-
-			path += 16 - vsllink_tms_data_len;
-			num_states -= 16 - vsllink_tms_data_len;
-			vsllink_tms_data_len = 0;
-			vsllink_tms_cmd_pos = NULL;
-		}
-	}
-
-	if (num_states > 0)
-	{
-		// Normal operation, don't need to append tms data
-		vsllink_tms_data_len = num_states & 7;
-
-		while (num_states > 0)
-		{
-			if (num_states > ((VSLLINK_CMDJTAGSEQ_LENMSK + 1) * 8))
-			{
-				i = (VSLLINK_CMDJTAGSEQ_LENMSK + 1) * 8;
-			}
-			else
-			{
-				i = num_states;
-			}
-			tms_len = (i + 7) >> 3;
-			vsllink_tap_ensure_space(0, tms_len + 2);
-			tms_cmd_pos = vsllink_usb_out_buffer_idx;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | (tms_len - 1);
-
-			vsllink_add_path(0, i, path + path_idx);
-
-			path_idx += i;
-			num_states -= i;
-		}
-
-		if (vsllink_tms_data_len > 0)
-		{
-			if (tms_len < (VSLLINK_CMDJTAGSEQ_LENMSK + 1))
-			{
-				vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[tms_cmd_pos];
-				(*vsllink_tms_cmd_pos)++;
-			}
-			else
-			{
-				vsllink_usb_out_buffer[tms_cmd_pos]--;
-
-				tms_len = vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-				vsllink_tap_ensure_space(0, 3);
-				vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | 1;
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = tms_len;
-			}
-		}
-	}
-}
-static void vsllink_path_move_dma(int num_states, tap_state_t *path)
-{
-	int i, j = 0;
-
-	if (tap_length & 7)
-	{
-		if ((8 - (tap_length & 7)) < num_states)
-		{
-			j = 8 - (tap_length & 7);
-		}
-		else
-		{
-			j = num_states;
-		}
-		for (i = 0; i < j; i++)
-		{
-			if (path[i] == tap_state_transition(tap_get_state(), false))
-			{
-				vsllink_tap_append_step(0, 0);
-			}
-			else if (path[i] == tap_state_transition(tap_get_state(), true))
-			{
-				vsllink_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]);
-		}
-		num_states -= j;
-	}
-
-	if (num_states > 0)
-	{
-		vsllink_tap_ensure_space(0, num_states);
-
-		for (i = 0; i < num_states; i++)
-		{
-			if (path[j + i] == tap_state_transition(tap_get_state(), false))
-			{
-				vsllink_tap_append_step(0, 0);
-			}
-			else if (path[j + i] == tap_state_transition(tap_get_state(), true))
-			{
-				vsllink_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[j + i]);
-		}
-	}
-
-	tap_set_end_state(tap_get_state());
-}
-
-static void vsllink_stableclocks_normal(int num_cycles, int tms)
-{
-	int tms_len;
-	uint16_t tms_append_byte;
-
-	if (vsllink_tms_data_len > 0)
-	{
-		// there are vsllink_tms_data_len more tms bits to be shifted
-		// so there are vsllink_tms_data_len + num_cycles tms bits in all
-		tms_len = vsllink_tms_data_len + num_cycles;
-		if (tms > 0)
-		{
-			// append '1' for tms
-			tms_append_byte = (uint16_t)((((1 << num_cycles) - 1) << vsllink_tms_data_len) & 0xFFFF);
-		}
-		else
-		{
-			// append '0' for tms
-			tms_append_byte = 0;
-		}
-		if (tms_len <= 16)
-		{
-			// merge into last tms shift
-			if (tms_len < 8)
-			{
-				// just add to vsllink_tms_data_len
-				// same result if tun through
-				//vsllink_tms_data_len += num_cycles;
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] |= (uint8_t)(tms_append_byte & 0xFF);
-			}
-			else if (tms_len == 8)
-			{
-				// end last tms shift command
-				// just reduce it, and append last tms byte
-				(*vsllink_tms_cmd_pos)--;
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (uint8_t)(tms_append_byte & 0xFF);
-			}
-			else if (tms_len < 16)
-			{
-				if ((*vsllink_tms_cmd_pos & VSLLINK_CMDJTAGSEQ_LENMSK) < VSLLINK_CMDJTAGSEQ_LENMSK)
-				{
-					// every tms shift command can contain VSLLINK_CMDJTAGSEQ_LENMSK + 1 bytes in most
-					// there is enought tms length in the current tms shift command
-					// increase the tms byte length by 1 and set the last byte to 0
-					(*vsllink_tms_cmd_pos)++;
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (uint8_t)(tms_append_byte & 0xFF);
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = (uint8_t)(tms_append_byte >> 8);
-				}
-				else
-				{
-					// every tms shift command can contain VSLLINK_CMDJTAGSEQ_LENMSK + 1 bytes in most
-					// not enough tms length in the current tms shift command
-					// so a new command should be added
-					// first decrease byte length of last tms shift command
-					(*vsllink_tms_cmd_pos)--;
-					// append last tms byte and move the command pointer to the next empty position
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (uint8_t)(tms_append_byte & 0xFF);
-					// add new command(3 bytes)
-					vsllink_tap_ensure_space(0, 3);
-					vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | 1;
-					vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = (uint8_t)(tms_append_byte >> 8);
-				}
-			}
-			else if (tms_len == 16)
-			{
-				// end last tms shift command
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (uint8_t)(tms_append_byte & 0xFF);
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (uint8_t)(tms_append_byte >> 8);
-			}
-
-			vsllink_tms_data_len = tms_len & 7;
-			if (vsllink_tms_data_len == 0)
-			{
-				vsllink_tms_cmd_pos = NULL;
-			}
-			num_cycles = 0;
-		}
-		else
-		{
-			// more shifts will be needed
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (uint8_t)(tms_append_byte & 0xFF);
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (uint8_t)(tms_append_byte >> 8);
-
-			num_cycles -= 16 - vsllink_tms_data_len;
-			vsllink_tms_data_len = 0;
-			vsllink_tms_cmd_pos = NULL;
-		}
-	}
-	// from here vsllink_tms_data_len == 0 or num_cycles == 0
-
-	if (vsllink_tms_data_len > 0)
-	{
-		// num_cycles == 0
-		// no need to shift
-		if (num_cycles > 0)
-		{
-			LOG_ERROR("There MUST be some bugs in the driver");
-			exit(-1);
-		}
-	}
-	else
-	{
-		// get number of bytes left to be sent
-		tms_len = num_cycles >> 3;
-		if (tms_len > 0)
-		{
-			vsllink_tap_ensure_space(1, 5);
-			// if tms_len > 0, vsllink_tms_data_len == 0
-			// so just add new command
-			// LSB of the command byte is the tms value when do the shifting
-			if (tms > 0)
-			{
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSCLOCK | 1;
-			}
-			else
-			{
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSCLOCK;
-			}
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 0) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 8) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 16) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 24) & 0xff;
-
-			vsllink_usb_in_want_length += 1;
-			pending_scan_results_buffer[pending_scan_results_length].buffer = NULL;
-			pending_scan_results_length++;
-
-			if (tms_len > 0xFFFF)
-			{
-				vsllink_tap_execute();
-			}
-		}
-
-		// post-process
-		vsllink_tms_data_len = num_cycles & 7;
-		if (vsllink_tms_data_len > 0)
-		{
-			vsllink_tap_ensure_space(0, 3);
-			vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | 1;
-			if (tms > 0)
-			{
-				// append '1' for tms
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = (1 << vsllink_tms_data_len) - 1;
-			}
-			else
-			{
-				// append '0' for tms
-				vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = 0x00;
-			}
-		}
-	}
-}
-static void vsllink_stableclocks_dma(int num_cycles, int tms)
-{
-	int i, cur_cycles;
-
-	if (tap_length & 7)
-	{
-		if ((8 - (tap_length & 7)) < num_cycles)
-		{
-			cur_cycles = 8 - (tap_length & 7);
-		}
-		else
-		{
-			cur_cycles = num_cycles;
-		}
-		for (i = 0; i < cur_cycles; i++)
-		{
-			vsllink_tap_append_step(tms, 0);
-		}
-		num_cycles -= cur_cycles;
-	}
-
-	while (num_cycles > 0)
-	{
-		if (num_cycles > 8 * tap_buffer_size)
-		{
-			cur_cycles = 8 * tap_buffer_size;
-		}
-		else
-		{
-			cur_cycles = num_cycles;
-		}
-
-		vsllink_tap_ensure_space(0, cur_cycles);
-
-		for (i = 0; i < cur_cycles; i++)
-		{
-			vsllink_tap_append_step(tms, 0);
-		}
-
-		num_cycles -= cur_cycles;
-	}
-}
-
-static void vsllink_runtest(int num_cycles)
-{
-	tap_state_t saved_end_state = tap_get_end_state();
-
-	if (tap_get_state() != TAP_IDLE)
-	{
-		// enter into IDLE state
-		vsllink_end_state(TAP_IDLE);
-		vsllink_state_move();
-	}
-
-	vsllink_stableclocks(num_cycles, 0);
-
-	// post-process
-	// set end_state
-	vsllink_end_state(saved_end_state);
-	tap_set_state(TAP_IDLE);
-	if (tap_get_end_state() != TAP_IDLE)
-	{
-		vsllink_state_move();
-	}
-}
-
-static void vsllink_scan_normal(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command)
-{
-	tap_state_t saved_end_state;
-	uint8_t bits_left, tms_tmp, tdi_len;
-	int i;
-
-	if (0 == scan_size)
-	{
-		return;
-	}
-
-	tdi_len = ((scan_size + 7) >> 3);
-	if ((tdi_len + 7) > VSLLINK_BufferSize)
-	{
-		LOG_ERROR("Your implementation of VSLLink has not enough buffer");
-		exit(-1);
-	}
-
-	saved_end_state = tap_get_end_state();
-
-	/* Move to appropriate scan state */
-	vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-
-	if (vsllink_tms_data_len > 0)
-	{
-		if (tap_get_state() == tap_get_end_state())
-		{
-			// already in IRSHIFT or DRSHIFT state
-			// merge tms data in the last tms shift command into next scan command
-			if (*vsllink_tms_cmd_pos < 1)
-			{
-				LOG_ERROR("There MUST be some bugs in the driver");
-				exit(-1);
-			}
-			else if (*vsllink_tms_cmd_pos < 2)
-			{
-				tms_tmp = vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-				vsllink_usb_out_buffer_idx--;
-			}
-			else
-			{
-				tms_tmp = vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
-				*vsllink_tms_cmd_pos -= 2;
-			}
-
-			vsllink_tap_ensure_space(1, tdi_len + 7);
-			// VSLLINK_CMDJTAGSEQ_SCAN ored by 1 means that tms_before is valid
-			// which is merged from the last tms shift command
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN | 1;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1) >> 0) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1) >> 8) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = tms_tmp;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = buffer[0] << (8 - vsllink_tms_data_len);
-
-			for (i = 0; i < tdi_len; i++)
-			{
-				buffer[i] >>= 8 - vsllink_tms_data_len;
-				if (i != tdi_len)
-				{
-					buffer[i] += buffer[i + 1] << vsllink_tms_data_len;
-				}
-			}
-
-			vsllink_tap_append_scan_normal(scan_size - vsllink_tms_data_len, buffer, command, vsllink_tms_data_len);
-			scan_size -= 8 - vsllink_tms_data_len;
-			vsllink_tms_data_len = 0;
-		}
-		else
-		{
-			vsllink_state_move();
-			vsllink_tap_ensure_space(1, tdi_len + 5);
-
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tdi_len >> 0) & 0xff;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tdi_len >> 8) & 0xff;
-
-			vsllink_tap_append_scan_normal(scan_size, buffer, command, 0);
-		}
-	}
-	else
-	{
-		vsllink_tap_ensure_space(1, tdi_len + 7);
-
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN | 1;
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1) >> 0) & 0xff;
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1)>> 8) & 0xff;
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0;
-
-		vsllink_tap_append_scan_normal(scan_size, buffer, command, 8);
-	}
-	vsllink_end_state(saved_end_state);
-
-	bits_left = scan_size & 0x07;
-	tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
-
-	if (bits_left > 0)
-	{
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 1 << (bits_left - 1);
-	}
-	else
-	{
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 1 << 7;
-	}
-
-	if (tap_get_state() != tap_get_end_state())
-	{
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
-	}
-	else
-	{
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0;
-	}
-
-	tap_set_state(tap_get_end_state());
-}
-static void vsllink_scan_dma(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command)
-{
-	tap_state_t saved_end_state;
-
-	saved_end_state = tap_get_end_state();
-
-	/* Move to appropriate scan state */
-	vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-
-	vsllink_state_move();
-	vsllink_end_state(saved_end_state);
-
-	/* Scan */
-	vsllink_tap_append_scan_dma(scan_size, buffer, command);
-
-	tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
-	while (tap_length % 8 != 0)
-	{
-		// more 0s in Pause
-		vsllink_tap_append_step(0, 0);
-	}
-
-	if (tap_get_state() != tap_get_end_state())
-	{
-		vsllink_state_move();
-	}
-}
-
-static void vsllink_reset(int trst, int srst)
-{
-	int result;
-
-	LOG_DEBUG("trst: %i, srst: %i", trst, srst);
-
-	/* Signals are active low */
-	vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_PORT;
-	vsllink_usb_out_buffer[1] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST;
-	vsllink_usb_out_buffer[2] = 0;
-	if (srst == 0)
-	{
-		vsllink_usb_out_buffer[2] |= JTAG_PINMSK_SRST;
-	}
-	if (trst == 0)
-	{
-		vsllink_usb_out_buffer[2] |= JTAG_PINMSK_TRST;
-	}
-
-	result = vsllink_usb_write(vsllink_handle, 3);
-	if (result != 3)
-	{
-		LOG_ERROR("VSLLink command VSLLINK_CMD_SET_PORT failed (%d)", result);
-	}
-}
-
-static void vsllink_simple_command(uint8_t command)
-{
-	int result;
-
-	DEBUG_JTAG_IO("0x%02x", command);
-
-	vsllink_usb_out_buffer[0] = command;
-	result = vsllink_usb_write(vsllink_handle, 1);
-
-	if (result != 1)
-	{
-		LOG_ERROR("VSLLink command 0x%02x failed (%d)", command, result);
-	}
-}
-
-COMMAND_HANDLER(vsllink_handle_mode_command)
-{
-	if (CMD_ARGC != 1) {
-		LOG_ERROR("parameter error, should be one parameter for VID");
-		return ERROR_FAIL;
-	}
-
-	if (!strcmp(CMD_ARGV[0], "normal"))
-	{
-		vsllink_mode = VSLLINK_MODE_NORMAL;
-	}
-	else if (!strcmp(CMD_ARGV[0], "dma"))
-	{
-		vsllink_mode = VSLLINK_MODE_DMA;
-	}
-	else
-	{
-		LOG_ERROR("invalid vsllink_mode: %s", CMD_ARGV[0]);
-		return ERROR_FAIL;
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(vsllink_handle_usb_vid_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		LOG_ERROR("parameter error, should be one parameter for VID");
-		return ERROR_OK;
-	}
-
-	COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], vsllink_usb_vid);
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(vsllink_handle_usb_pid_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		LOG_ERROR("parameter error, should be one parameter for PID");
-		return ERROR_OK;
-	}
-	COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], vsllink_usb_pid);
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(vsllink_handle_usb_bulkin_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		LOG_ERROR("parameter error, should be one parameter for BULKIN endpoint");
-		return ERROR_OK;
-	}
-
-	COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], vsllink_usb_bulkin);
-
-	vsllink_usb_bulkin |= 0x80;
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(vsllink_handle_usb_bulkout_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		LOG_ERROR("parameter error, should be one parameter for BULKOUT endpoint");
-		return ERROR_OK;
-	}
-
-	COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], vsllink_usb_bulkout);
-
-	vsllink_usb_bulkout &= ~0x80;
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(vsllink_handle_usb_interface_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		LOG_ERROR("parameter error, should be one parameter for interface number");
-		return ERROR_OK;
-	}
-
-	COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], vsllink_usb_interface);
-	return ERROR_OK;
-}
-
-/***************************************************************************/
-/* VSLLink tap functions */
-
-static void vsllink_tap_init_normal(void)
-{
-	vsllink_usb_out_buffer_idx = 0;
-	vsllink_usb_in_want_length = 0;
-	pending_scan_results_length = 0;
-}
-static void vsllink_tap_init_dma(void)
-{
-	tap_length = 0;
-	pending_scan_results_length = 0;
-}
-
-static void vsllink_tap_ensure_space_normal(int scans, int length)
-{
-	int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
-	int available_bytes = VSLLINK_BufferSize - vsllink_usb_out_buffer_idx;
-
-	if (scans > available_scans || length > available_bytes)
-	{
-		vsllink_tap_execute();
-	}
-}
-static void vsllink_tap_ensure_space_dma(int scans, int length)
-{
-	int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
-	int available_bytes = tap_buffer_size * 8 - tap_length;
-
-	if (scans > available_scans || length > available_bytes)
-	{
-		vsllink_tap_execute();
-	}
-}
-
-static void vsllink_tap_append_step(int tms, int tdi)
-{
-	last_tms = tms;
-	int index = tap_length / 8;
-
-	if (index < tap_buffer_size)
-	{
-		int bit_index = tap_length % 8;
-		uint8_t 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("buffer overflow, tap_length=%d", tap_length);
-	}
-}
-
-static void vsllink_tap_append_scan_normal(int length, uint8_t *buffer, struct scan_command *command, int offset)
-{
-	struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
-	int i;
-
-	if (offset > 0)
-	{
-		vsllink_usb_in_want_length += ((length + 7) >> 3) + 1;
-	}
-	else
-	{
-		vsllink_usb_in_want_length += (length + 7) >> 3;
-	}
-	pending_scan_result->length = length;
-	pending_scan_result->offset = offset;
-	pending_scan_result->command = command;
-	pending_scan_result->buffer = buffer;
-
-	for (i = 0; i < ((length + 7) >> 3); i++)
-	{
-		vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = buffer[i];
-	}
-
-	pending_scan_results_length++;
-}
-static void vsllink_tap_append_scan_dma(int length, uint8_t *buffer, struct scan_command *command)
-{
-	struct pending_scan_result *pending_scan_result;
-	int len_tmp, len_all, i;
-
-	len_all = 0;
-	while (len_all < length)
-	{
-		if ((length - len_all) > tap_buffer_size * 8)
-		{
-			len_tmp = tap_buffer_size * 8;
-		}
-		else
-		{
-			len_tmp = length - len_all;
-		}
-
-		vsllink_tap_ensure_space(1, (len_tmp + 7) & ~7);
-
-		pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
-		pending_scan_result->offset = tap_length;
-		pending_scan_result->length = len_tmp;
-		pending_scan_result->command = command;
-		pending_scan_result->buffer = buffer + len_all / 8;
-
-		for (i = 0; i < len_tmp; i++)
-		{
-			vsllink_tap_append_step(((len_all + i) < length-1 ? 0 : 1), (buffer[(len_all + i)/8] >> ((len_all + i)%8)) & 1);
-		}
-
-		pending_scan_results_length++;
-		len_all += len_tmp;
-	}
-}
-
-/* Pad and send a tap sequence to the device, and receive the answer.
- * For the purpose of padding we assume that we are in reset or idle or pause state. */
-static int vsllink_tap_execute_normal(void)
-{
-	int i;
-	int result;
-	int first = 0;
-
-	if (vsllink_tms_data_len > 0)
-	{
-		if ((tap_get_state() != TAP_RESET) && (tap_get_state() != TAP_IDLE) && (tap_get_state() != TAP_IRPAUSE) && (tap_get_state() != TAP_DRPAUSE))
-		{
-			LOG_WARNING("%s is not in RESET or IDLE or PAUSR state", tap_state_name(tap_get_state()));
-		}
-
-		if (vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] & (1 << (vsllink_tms_data_len - 1)))
-		{
-			// last tms bit is '1'
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= 0xFF << vsllink_tms_data_len;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0xFF;
-			vsllink_tms_data_len = 0;
-		}
-		else
-		{
-			// last tms bit is '0'
-			vsllink_usb_out_buffer_idx++;
-			vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0;
-			vsllink_tms_data_len = 0;
-		}
-	}
-
-	if (vsllink_usb_out_buffer_idx > 3)
-	{
-		if (vsllink_usb_out_buffer[0] == VSLLINK_CMD_HW_JTAGSEQCMD)
-		{
-			vsllink_usb_out_buffer[1] = (vsllink_usb_out_buffer_idx >> 0) & 0xff;
-			vsllink_usb_out_buffer[2] = (vsllink_usb_out_buffer_idx >> 8) & 0xff;
-		}
-
-		result = vsllink_usb_message(vsllink_handle, vsllink_usb_out_buffer_idx, vsllink_usb_in_want_length);
-
-		if (result == vsllink_usb_in_want_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 offset = pending_scan_result->offset;
-				struct scan_command *command = pending_scan_result->command;
-
-				if (buffer != NULL)
-				{
-					// IRSHIFT or DRSHIFT
-					buf_set_buf(vsllink_usb_in_buffer, first * 8 + offset, buffer, 0, length);
-					first += (length + offset + 7) >> 3;
-
-					DEBUG_JTAG_IO("JTAG scan read(%d bits):", length);
-#ifdef _DEBUG_JTAG_IO_
-					vsllink_debug_buffer(buffer, (length + 7) >> 3);
-#endif
-
-					if (jtag_read_buffer(buffer, command) != ERROR_OK)
-					{
-						vsllink_tap_init();
-						return ERROR_JTAG_QUEUE_FAILED;
-					}
-
-					free(pending_scan_result->buffer);
-					pending_scan_result->buffer = NULL;
-				}
-				else
-				{
-					first++;
-				}
-			}
-		}
-		else
-		{
-			LOG_ERROR("vsllink_tap_execute, wrong result %d, expected %d", result, vsllink_usb_in_want_length);
-			return ERROR_JTAG_QUEUE_FAILED;
-		}
-
-		vsllink_tap_init();
-	}
-	reset_command_pointer();
-
-	return ERROR_OK;
-}
-static int vsllink_tap_execute_dma(void)
-{
-	int byte_length;
-	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. */
-			vsllink_tap_append_step(last_tms, 0);
-		}
-		byte_length = tap_length / 8;
-
-		vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGRAWCMD;
-		vsllink_usb_out_buffer[1] = ((byte_length * 2 + 3) >> 0) & 0xff;		// package size
-		vsllink_usb_out_buffer[2] = ((byte_length * 2 + 3) >> 8) & 0xff;
-
-		memcpy(&vsllink_usb_out_buffer[3], tdi_buffer, byte_length);
-		memcpy(&vsllink_usb_out_buffer[3 + byte_length], tms_buffer, byte_length);
-
-		result = vsllink_usb_message(vsllink_handle, 3 + 2 * byte_length, byte_length);
-		if (result == byte_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->offset;
-
-				struct scan_command *command = pending_scan_result->command;
-				buf_set_buf(vsllink_usb_in_buffer, first, buffer, 0, length);
-
-				DEBUG_JTAG_IO("JTAG scan read(%d bits, from %d bits):", length, first);
-#ifdef _DEBUG_JTAG_IO_
-				vsllink_debug_buffer(buffer, (length + 7) >> 3);
-#endif
-
-				if (jtag_read_buffer(buffer, command) != ERROR_OK)
-				{
-					vsllink_tap_init();
-					return ERROR_JTAG_QUEUE_FAILED;
-				}
-
-				if (pending_scan_result->buffer != NULL)
-				{
-					free(pending_scan_result->buffer);
-				}
-			}
-		}
-		else
-		{
-			LOG_ERROR("vsllink_tap_execute, wrong result %d, expected %d", result, byte_length);
-			return ERROR_JTAG_QUEUE_FAILED;
-		}
-
-		vsllink_tap_init();
-	}
-
-	return ERROR_OK;
-}
-
-/*****************************************************************************/
-/* VSLLink USB low-level functions */
-
-static struct vsllink* vsllink_usb_open(void)
-{
-	usb_init();
-
-	const uint16_t vids[] = { vsllink_usb_vid, 0 };
-	const uint16_t pids[] = { vsllink_usb_pid, 0 };
-	struct usb_dev_handle *dev;
-	if (jtag_usb_open(vids, pids, &dev) != ERROR_OK)
-		return NULL;
-
-	/* usb_set_configuration required under win32 */
-	struct usb_device *udev = usb_device(dev);
-	int ret = usb_set_configuration(dev, udev->config[0].bConfigurationValue);
-	if (ret != 0)
-	{
-		LOG_ERROR("fail to set configuration to %d (error %d)."
-				"Not enough permissions for the device?",
-				udev->config[0].bConfigurationValue, ret);
-		return NULL;
-	}
-	ret = usb_claim_interface(dev, vsllink_usb_interface);
-	if (ret != 0)
-	{
-		LOG_ERROR("fail to claim interface %d, %d returned",
-				vsllink_usb_interface, ret);
-		return NULL;
-	}
-#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(dev, 0);
-#endif
-
-	struct vsllink *result = malloc(sizeof(struct vsllink));
-	result->usb_handle = dev;
-	return result;
-}
-
-static void vsllink_usb_close(struct vsllink *vsllink)
-{
-	int ret;
-
-	ret = usb_release_interface(vsllink->usb_handle, vsllink_usb_interface);
-	if (ret != 0)
-	{
-		LOG_ERROR("fail to release interface %d, %d returned", vsllink_usb_interface, ret);
-		exit(-1);
-	}
-
-	ret = usb_close(vsllink->usb_handle);
-	if (ret != 0)
-	{
-		LOG_ERROR("fail to close usb, %d returned", ret);
-		exit(-1);
-	}
-
-	free(vsllink);
-}
-
-/* Send a message and receive the reply. */
-static int vsllink_usb_message(struct vsllink *vsllink, int out_length, int in_length)
-{
-	int result;
-
-	result = vsllink_usb_write(vsllink, out_length);
-	if (result == out_length)
-	{
-		if (in_length > 0)
-		{
-			result = vsllink_usb_read(vsllink);
-			if (result == in_length)
-			{
-				return result;
-			}
-			else
-			{
-				LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result);
-				return -1;
-			}
-		}
-		return 0;
-	}
-	else
-	{
-		LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result);
-		return -1;
-	}
-}
-
-/* Write data from out_buffer to USB. */
-static int vsllink_usb_write(struct vsllink *vsllink, int out_length)
-{
-	int result;
-
-	if (out_length > VSLLINK_BufferSize)
-	{
-		LOG_ERROR("vsllink_write illegal out_length=%d (max=%d)", out_length, VSLLINK_BufferSize);
-		return -1;
-	}
-
-	result = usb_bulk_write(vsllink->usb_handle, vsllink_usb_bulkout, \
-		(char *)vsllink_usb_out_buffer, out_length, VSLLINK_USB_TIMEOUT);
-
-	DEBUG_JTAG_IO("vsllink_usb_write, out_length = %d, result = %d", out_length, result);
-
-#ifdef _DEBUG_USB_COMMS_
-	LOG_DEBUG("USB out:");
-	vsllink_debug_buffer(vsllink_usb_out_buffer, out_length);
-#endif
-
-#ifdef _VSLLINK_IN_DEBUG_MODE_
-	usleep(100000);
-#endif
-
-	return result;
-}
-
-/* Read data from USB into in_buffer. */
-static int vsllink_usb_read(struct vsllink *vsllink)
-{
-	int result = usb_bulk_read(vsllink->usb_handle, vsllink_usb_bulkin, \
-		(char *)vsllink_usb_in_buffer, VSLLINK_BufferSize, VSLLINK_USB_TIMEOUT);
-
-	DEBUG_JTAG_IO("vsllink_usb_read, result = %d", result);
-
-#ifdef _DEBUG_USB_COMMS_
-	LOG_DEBUG("USB in:");
-	vsllink_debug_buffer(vsllink_usb_in_buffer, result);
-#endif
-	return result;
-}
-
-#define BYTES_PER_LINE  16
-
-#if defined _DEBUG_USB_COMMS_ || defined _DEBUG_JTAG_IO_
-static void vsllink_debug_buffer(uint8_t *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("%s", line);
-	}
-}
-#endif // _DEBUG_USB_COMMS_ || _DEBUG_JTAG_IO_
-
-static const struct command_registration vsllink_command_handlers[] = {
-	{
-		.name = "vsllink_usb_vid",
-		.handler = &vsllink_handle_usb_vid_command,
-		.mode = COMMAND_CONFIG,
-	},
-	{
-		.name = "vsllink_usb_pid",
-		.handler = &vsllink_handle_usb_pid_command,
-		.mode = COMMAND_CONFIG,
-	},
-	{
-		.name = "vsllink_usb_bulkin",
-		.handler = &vsllink_handle_usb_bulkin_command,
-		.mode = COMMAND_CONFIG,
-	},
-	{
-		.name = "vsllink_usb_bulkout",
-		.handler = &vsllink_handle_usb_bulkout_command,
-		.mode = COMMAND_CONFIG,
-	},
-	{
-		.name = "vsllink_usb_interface",
-		.handler = &vsllink_handle_usb_interface_command,
-		.mode = COMMAND_CONFIG,
-	},
-	{
-		.name = "vsllink_mode",
-		.handler = &vsllink_handle_mode_command,
-		.mode = COMMAND_CONFIG,
-	},
-	COMMAND_REGISTRATION_DONE
-};
-
-struct jtag_interface vsllink_interface = {
-		.name = "vsllink",
-		.commands = vsllink_command_handlers,
-
-		.init = &vsllink_init,
-		.quit = &vsllink_quit,
-		.khz = &vsllink_khz,
-		.speed = &vsllink_speed,
-		.speed_div = &vsllink_speed_div,
-		.execute_queue = &vsllink_execute_queue,
-	};