ST-LINK USB initial release

ST-Link USB support added.

Change-Id: I2812646f2895b1529ff3f911edbdce7fa0051c8f
Signed-off-by: Mathias K <kesmtp@freenet.de>
Reviewed-on: http://openocd.zylin.com/261
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

14 files changed, 1513 insertions, 1 deletions

diff --git a/src/jtag/Makefile.am b/src/jtag/Makefile.am
index d8a71e2..b6692ee 100644
--- a/src/jtag/Makefile.am
+++ b/src/jtag/Makefile.am
@@ -39,9 +39,15 @@ else
 MINIDRIVER_IMP_DIR = $(srcdir)/drivers
 DRIVERFILES += commands.c
 
+if STLINK
+SUBDIRS += stlink
+libjtag_la_LIBADD += $(top_builddir)/src/jtag/stlink/libocdstlink.la
+endif
+
 SUBDIRS += drivers
 libjtag_la_LIBADD += $(top_builddir)/src/jtag/drivers/libocdjtagdrivers.la
 
+
 endif
 
 # endif // MINIDRIVER
diff --git a/src/jtag/drivers/Makefile.am b/src/jtag/drivers/Makefile.am
index 1f239b7..7dbaab2 100644
--- a/src/jtag/drivers/Makefile.am
+++ b/src/jtag/drivers/Makefile.am
@@ -94,6 +94,9 @@ endif
 if REMOTE_BITBANG
 DRIVERFILES += remote_bitbang.c
 endif
+if STLINK
+DRIVERFILES += stlink_usb.c
+endif
 
 noinst_HEADERS = \
 	bitbang.h \
@@ -103,6 +106,7 @@ noinst_HEADERS = \
 	rlink_dtc_cmd.h \
 	rlink_ep1_cmd.h \
 	rlink_st7.h \
-	usb_common.h
+	usb_common.h \
+	stlink_usb.h
 
 MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
new file mode 100644
index 0000000..aaf55b0
--- /dev/null
+++ b/src/jtag/drivers/stlink_usb.c
@@ -0,0 +1,658 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   This code is based on https://github.com/texane/stlink                *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* project specific includes */
+#include <helper/binarybuffer.h>
+#include <jtag/interface.h>
+#include <jtag/stlink/stlink_layout.h>
+#include <jtag/stlink/stlink_interface.h>
+#include <target/target.h>
+
+#include "libusb_common.h"
+
+#define ENDPOINT_IN	0x80
+#define ENDPOINT_OUT	0x00
+
+#define STLINK_RX_EP	(1|ENDPOINT_IN)
+#define STLINK_TX_EP	(2|ENDPOINT_OUT)
+#define STLINK_CMD_SIZE	(16)
+#define STLINK_TX_SIZE	(4*128)
+#define STLINK_RX_SIZE	(4*128)
+
+/** */
+struct stlink_usb_handle_s {
+	/** */
+	struct jtag_libusb_device_handle *fd;
+	/** */
+	struct libusb_transfer *trans;
+	/** */
+	uint8_t txbuf[STLINK_TX_SIZE];
+	/** */
+	uint8_t rxbuf[STLINK_RX_SIZE];
+};
+
+#define STLINK_OK			0x80
+#define STLINK_FALSE			0x81
+#define STLINK_CORE_RUNNING		0x80
+#define STLINK_CORE_HALTED		0x81
+#define STLINK_CORE_STAT_UNKNOWN	-1
+
+#define STLINK_GET_VERSION		0xf1
+#define STLINK_GET_CURRENT_MODE		0xf5
+
+#define STLINK_DEBUG_COMMAND		0xF2
+#define STLINK_DFU_COMMAND		0xF3
+#define STLINK_DFU_EXIT			0x07
+
+#define STLINK_DEV_DFU_MODE		0x00
+#define STLINK_DEV_MASS_MODE		0x01
+#define STLINK_DEV_DEBUG_MODE		0x02
+#define STLINK_DEV_UNKNOWN_MODE		-1
+
+#define STLINK_DEBUG_ENTER		0x20
+#define STLINK_DEBUG_EXIT		0x21
+#define STLINK_DEBUG_READCOREID		0x22
+
+#define STLINK_DEBUG_GETSTATUS		0x01
+#define STLINK_DEBUG_FORCEDEBUG		0x02
+#define STLINK_DEBUG_RESETSYS		0x03
+#define STLINK_DEBUG_READALLREGS	0x04
+#define STLINK_DEBUG_READREG		0x05
+#define STLINK_DEBUG_WRITEREG		0x06
+#define STLINK_DEBUG_READMEM_32BIT	0x07
+#define STLINK_DEBUG_WRITEMEM_32BIT	0x08
+#define STLINK_DEBUG_RUNCORE		0x09
+#define STLINK_DEBUG_STEPCORE		0x0a
+#define STLINK_DEBUG_SETFP		0x0b
+#define STLINK_DEBUG_WRITEMEM_8BIT	0x0d
+#define STLINK_DEBUG_CLEARFP		0x0e
+#define STLINK_DEBUG_WRITEDEBUGREG	0x0f
+#define STLINK_DEBUG_ENTER_SWD		0xa3
+#define STLINK_DEBUG_ENTER_JTAG		0x00
+
+#define STLINK_SWD_ENTER		0x30
+#define STLINK_SWD_READCOREID		0x32
+
+/** */
+int stlink_usb_recv(void *handle, uint8_t *txbuf, int txsize, uint8_t *rxbuf,
+		    int rxsize)
+{
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	if (jtag_libusb_bulk_write(h->fd, STLINK_TX_EP, (char *)txbuf, txsize,
+				   1000) != txsize) {
+		return ERROR_FAIL;
+	}
+	if (rxsize && rxbuf) {
+		if (jtag_libusb_bulk_read(h->fd, STLINK_RX_EP, (char *)rxbuf,
+					  rxsize, 1000) != rxsize) {
+			return ERROR_FAIL;
+		}
+	}
+	return ERROR_OK;
+}
+
+/** */
+void stlink_usb_init_buffer(void *handle)
+{
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	memset(h->txbuf, 0, STLINK_CMD_SIZE);
+}
+
+/** */
+int stlink_usb_version(void *handle)
+{
+	int res;
+	uint16_t v;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_GET_VERSION;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 6);
+
+	if (res != ERROR_OK)
+		return res;
+
+	v = (h->rxbuf[0] << 8) | h->rxbuf[1];
+
+	LOG_DEBUG("STLINK v%d", (v >> 12) & 0x0f);
+	LOG_DEBUG("JTAG   v%d", (v >> 6) & 0x3f);
+	LOG_DEBUG("SWIM   v%d", v & 0x3f);
+	LOG_DEBUG("VID    %04X", buf_get_u32(h->rxbuf, 16, 16));
+	LOG_DEBUG("PID    %04X", buf_get_u32(h->rxbuf, 32, 16));
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_current_mode(void *handle, uint8_t *mode)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_GET_CURRENT_MODE;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	*mode = h->rxbuf[0];
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_dfu_mode_leave(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DFU_COMMAND;
+	h->txbuf[1] = STLINK_DFU_EXIT;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_swd_mode_enter(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_ENTER;
+	h->txbuf[2] = STLINK_DEBUG_ENTER_SWD;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_debug_mode_leave(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_EXIT;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_init_mode(void *handle)
+{
+	int res;
+	uint8_t mode;
+
+	assert(handle != NULL);
+
+	res = stlink_usb_current_mode(handle, &mode);
+
+	if (res != ERROR_OK)
+		return res;
+
+	LOG_DEBUG("MODE: %02X", mode);
+
+	if (mode == STLINK_DEV_DFU_MODE) {
+		res = stlink_usb_dfu_mode_leave(handle);
+
+		if (res != ERROR_OK)
+			return res;
+	}
+
+	res = stlink_usb_current_mode(handle, &mode);
+
+	if (res != ERROR_OK)
+		return res;
+
+	LOG_DEBUG("MODE: %02X", mode);
+
+	if (mode != STLINK_DEV_DEBUG_MODE) {
+		res = stlink_usb_swd_mode_enter(handle);
+
+		if (res != ERROR_OK)
+			return res;
+	}
+
+	res = stlink_usb_current_mode(handle, &mode);
+
+	if (res != ERROR_OK)
+		return res;
+
+	LOG_DEBUG("MODE: %02X", mode);
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_idcode(void *handle, uint32_t *idcode)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_READCOREID;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 4);
+
+	if (res != ERROR_OK)
+		return res;
+
+	*idcode = le_to_h_u32(h->rxbuf);
+
+	LOG_DEBUG("IDCODE: %08X", *idcode);
+
+	return ERROR_OK;
+}
+
+/** */
+enum target_state stlink_usb_state(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_GETSTATUS;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return TARGET_UNKNOWN;
+
+	if (h->rxbuf[0] == STLINK_CORE_RUNNING)
+		return TARGET_RUNNING;
+	if (h->rxbuf[0] == STLINK_CORE_HALTED)
+		return TARGET_HALTED;
+
+	return TARGET_UNKNOWN;
+}
+
+/** */
+int stlink_usb_reset(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_RESETSYS;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	LOG_DEBUG("RESET: %08X", h->rxbuf[0]);
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_run(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_RUNCORE;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_halt(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_FORCEDEBUG;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_step(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_STEPCORE;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_read_regs(void *handle)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_READALLREGS;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 84);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_read_reg(void *handle, int num, uint32_t *val)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_READREG;
+	h->txbuf[2] = num;
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 4);
+
+	if (res != ERROR_OK)
+		return res;
+
+	*val = le_to_h_u32(h->rxbuf);
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_write_reg(void *handle, int num, uint32_t val)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_WRITEREG;
+	h->txbuf[2] = num;
+	h_u32_to_le(h->txbuf + 3, val);
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, 2);
+
+	if (res != ERROR_OK)
+		return res;
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_read_mem32(void *handle, uint32_t addr, uint16_t len,
+			  uint32_t *buffer)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	len *= 4;
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_READMEM_32BIT;
+	h_u32_to_le(h->txbuf + 2, addr);
+	h_u16_to_le(h->txbuf + 2 + 4, len);
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, h->rxbuf, len);
+
+	if (res != ERROR_OK)
+		return res;
+
+	memcpy(buffer, h->rxbuf, len);
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
+			   uint32_t *buffer)
+{
+	int res;
+	struct stlink_usb_handle_s *h;
+
+	assert(handle != NULL);
+
+	h = (struct stlink_usb_handle_s *)handle;
+
+	stlink_usb_init_buffer(handle);
+
+	len *= 4;
+
+	h->txbuf[0] = STLINK_DEBUG_COMMAND;
+	h->txbuf[1] = STLINK_DEBUG_WRITEMEM_32BIT;
+	h_u32_to_le(h->txbuf + 2, addr);
+	h_u16_to_le(h->txbuf + 2 + 4, len);
+
+	res = stlink_usb_recv(handle, h->txbuf, STLINK_CMD_SIZE, 0, 0);
+
+	if (res != ERROR_OK)
+		return res;
+
+	res = stlink_usb_recv(handle, (uint8_t *) buffer, len, 0, 0);
+
+	if (res != ERROR_OK)
+		return res;
+
+	memcpy(buffer, h->rxbuf, len);
+
+	return ERROR_OK;
+}
+
+/** */
+int stlink_usb_open(struct stlink_interface_param_s *param, void **fd)
+{
+	struct stlink_usb_handle_s *h;
+
+	LOG_DEBUG("stlink_usb_open");
+
+	h = malloc(sizeof(struct stlink_usb_handle_s));
+
+	if (h == 0) {
+		LOG_DEBUG("stlink_open_usb: malloc failed");
+		return ERROR_FAIL;
+	}
+
+	const uint16_t vids[] = { param->vid, 0 };
+	const uint16_t pids[] = { param->pid, 0 };
+
+	LOG_DEBUG("stlink_open_usb: vid: %04x pid: %04x", param->vid,
+		  param->pid);
+
+	if (jtag_libusb_open(vids, pids, &h->fd) != ERROR_OK) {
+		LOG_DEBUG("stlink_open_usb: open failed");
+		return ERROR_FAIL;
+	}
+
+	jtag_libusb_set_configuration(h->fd, 0);
+
+	if (jtag_libusb_claim_interface(h->fd, 0) != ERROR_OK) {
+		LOG_DEBUG("stlink_open_usb: claim failed");
+		return ERROR_FAIL;
+	}
+
+	stlink_usb_init_mode(h);
+
+	stlink_usb_version(h);
+
+	*fd = h;
+
+	return ERROR_OK;
+}
+
+/** */
+struct stlink_layout_api_s stlink_layout_api = {
+	/** */
+	.open = stlink_usb_open,
+	/** */
+	.idcode = stlink_usb_idcode,
+	/** */
+	.state = stlink_usb_state,
+	/** */
+	.reset = stlink_usb_reset,
+	/** */
+	.run = stlink_usb_run,
+	/** */
+	.halt = stlink_usb_halt,
+	/** */
+	.step = stlink_usb_step,
+	/** */
+	.read_regs = stlink_usb_read_regs,
+	/** */
+	.read_reg = stlink_usb_read_reg,
+	/** */
+	.write_reg = stlink_usb_write_reg,
+	/** */
+	.read_mem32 = stlink_usb_read_mem32,
+	/** */
+	.write_mem32 = stlink_usb_write_mem32,
+};
diff --git a/src/jtag/drivers/stlink_usb.h b/src/jtag/drivers/stlink_usb.h
new file mode 100644
index 0000000..f564a0c
--- /dev/null
+++ b/src/jtag/drivers/stlink_usb.h
@@ -0,0 +1,7 @@
+#ifndef _STLINK_USB_H_
+#define _STLINK_USB_H_
+
+/** */
+void *stlink_open_usb(struct stlink_interface_param_s *param);
+
+#endif
diff --git a/src/jtag/interfaces.c b/src/jtag/interfaces.c
index 76a4e8d..7e8748a 100644
--- a/src/jtag/interfaces.c
+++ b/src/jtag/interfaces.c
@@ -100,6 +100,9 @@ extern struct jtag_interface buspirate_interface;
 #if BUILD_REMOTE_BITBANG == 1
 extern struct jtag_interface remote_bitbang_interface;
 #endif
+#if BUILD_STLINK == 1
+extern struct jtag_interface stlink_interface;
+#endif
 #endif // standard drivers
 
 /**
@@ -169,6 +172,9 @@ struct jtag_interface *jtag_interfaces[] = {
 #if BUILD_REMOTE_BITBANG == 1
 		&remote_bitbang_interface,
 #endif
+#if BUILD_STLINK == 1
+		&stlink_interface,
+#endif
 #endif // standard drivers
 		NULL,
 	};
diff --git a/src/jtag/stlink/Makefile.am b/src/jtag/stlink/Makefile.am
new file mode 100644
index 0000000..ac5b3af
--- /dev/null
+++ b/src/jtag/stlink/Makefile.am
@@ -0,0 +1,22 @@
+include $(top_srcdir)/common.mk
+
+noinst_LTLIBRARIES = libocdstlink.la
+
+libocdstlink_la_SOURCES = \
+	$(STLINKFILES)
+
+nobase_dist_pkglib_DATA =
+
+STLINKFILES =
+
+if STLINK
+STLINKFILES += stlink_transport.c
+STLINKFILES += stlink_tcl.c
+STLINKFILES += stlink_interface.c
+STLINKFILES += stlink_layout.c
+endif
+
+noinst_HEADERS = \
+	stlink_tcl.h
+
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
diff --git a/src/jtag/stlink/stlink_interface.c b/src/jtag/stlink/stlink_interface.c
new file mode 100644
index 0000000..a2ac99f
--- /dev/null
+++ b/src/jtag/stlink/stlink_interface.c
@@ -0,0 +1,225 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* project specific includes */
+#include <jtag/interface.h>
+#include <transport/transport.h>
+#include <helper/time_support.h>
+
+#include <jtag/stlink/stlink_tcl.h>
+#include <jtag/stlink/stlink_layout.h>
+#include <jtag/stlink/stlink_interface.h>
+
+#include <target/target.h>
+
+static struct stlink_interface_s stlink_if = { {0, 0, 0, 0}, 0, 0 };
+
+int stlink_interface_open(void)
+{
+	LOG_DEBUG("stlink_interface_open");
+
+	return stlink_if.layout->open(&stlink_if);
+}
+
+int stlink_interface_init_target(struct target *t)
+{
+	int res;
+
+	/* this is the interface for the current target and we
+	 * can setup the private pointer in the tap structure
+	 * if the interface match the tap idcode
+	 */
+	res = stlink_if.layout->api->idcode(stlink_if.fd, &t->tap->idcode);
+
+	if (res != ERROR_OK)
+		return res;
+
+	unsigned ii, limit = t->tap->expected_ids_cnt;
+	int found = 0;
+
+	for (ii = 0; ii < limit; ii++) {
+		uint32_t expected = t->tap->expected_ids[ii];
+
+		if (t->tap->idcode == expected) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (found == 0) {
+		LOG_ERROR
+		    ("stlink_interface_init_target: target not found: idcode: %x ",
+		     t->tap->idcode);
+		return ERROR_FAIL;
+	}
+
+	t->tap->priv = &stlink_if;
+	t->tap->hasidcode = 1;
+
+	return ERROR_OK;
+}
+
+static int stlink_interface_init(void)
+{
+	LOG_DEBUG("stlink_interface_init");
+
+	/* here we can initialize the layout */
+	return stlink_layout_init(&stlink_if);
+}
+
+static int stlink_interface_quit(void)
+{
+	LOG_DEBUG("stlink_interface_quit");
+
+	return ERROR_OK;
+}
+
+static int stlink_interface_speed(int speed)
+{
+	LOG_DEBUG("stlink_interface_speed: ignore speed %d", speed);
+
+	return ERROR_OK;
+}
+
+static int stlink_interface_execute_queue(void)
+{
+	LOG_DEBUG("stlink_interface_execute_queue: ignored");
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(stlink_interface_handle_device_desc_command)
+{
+	LOG_DEBUG("stlink_interface_handle_device_desc_command");
+
+	if (CMD_ARGC == 1) {
+		stlink_if.param.device_desc = strdup(CMD_ARGV[0]);
+	} else {
+		LOG_ERROR
+		    ("expected exactly one argument to stlink_device_desc <description>");
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(stlink_interface_handle_serial_command)
+{
+	LOG_DEBUG("stlink_interface_handle_serial_command");
+
+	if (CMD_ARGC == 1) {
+		stlink_if.param.serial = strdup(CMD_ARGV[0]);
+	} else {
+		LOG_ERROR
+		    ("expected exactly one argument to stlink_serial <serial-number>");
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(stlink_interface_handle_layout_command)
+{
+	LOG_DEBUG("stlink_interface_handle_layout_command");
+
+	if (CMD_ARGC != 1) {
+		LOG_ERROR("Need exactly one argument to stlink_layout");
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	if (stlink_if.layout) {
+		LOG_ERROR("already specified stlink_layout %s",
+			  stlink_if.layout->name);
+		return (strcmp(stlink_if.layout->name, CMD_ARGV[0]) != 0)
+		    ? ERROR_FAIL : ERROR_OK;
+	}
+
+	for (const struct stlink_layout *l = stlink_layout_get_list(); l->name;
+	     l++) {
+		if (strcmp(l->name, CMD_ARGV[0]) == 0) {
+			stlink_if.layout = l;
+			return ERROR_OK;
+		}
+	}
+
+	LOG_ERROR("No STLINK layout '%s' found", CMD_ARGV[0]);
+	return ERROR_FAIL;
+}
+
+COMMAND_HANDLER(stlink_interface_handle_vid_pid_command)
+{
+	LOG_DEBUG("stlink_interface_handle_vid_pid_command");
+
+	if (CMD_ARGC != 2) {
+		LOG_WARNING
+		    ("ignoring extra IDs in stlink_vid_pid (maximum is 1 pair)");
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], stlink_if.param.vid);
+	COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], stlink_if.param.pid);
+
+	return ERROR_OK;
+}
+
+static const struct command_registration stlink_interface_command_handlers[] = {
+	{
+	 .name = "stlink_device_desc",
+	 .handler = &stlink_interface_handle_device_desc_command,
+	 .mode = COMMAND_CONFIG,
+	 .help = "set the stlink device description of the STLINK device",
+	 .usage = "description_string",
+	 },
+	{
+	 .name = "stlink_serial",
+	 .handler = &stlink_interface_handle_serial_command,
+	 .mode = COMMAND_CONFIG,
+	 .help = "set the serial number of the STLINK device",
+	 .usage = "serial_string",
+	 },
+	{
+	 .name = "stlink_layout",
+	 .handler = &stlink_interface_handle_layout_command,
+	 .mode = COMMAND_CONFIG,
+	 .help = "set the layout of the STLINK to usb or sg",
+	 .usage = "layout_name",
+	 },
+	{
+	 .name = "stlink_vid_pid",
+	 .handler = &stlink_interface_handle_vid_pid_command,
+	 .mode = COMMAND_CONFIG,
+	 .help = "the vendor and product ID of the STLINK device",
+	 .usage = "(vid pid)* ",
+	 },
+	COMMAND_REGISTRATION_DONE
+};
+
+struct jtag_interface stlink_interface = {
+	.name = "stlink",
+	.supported = 0,
+	.commands = stlink_interface_command_handlers,
+	.transports = stlink_transports,
+
+	.init = stlink_interface_init,
+	.quit = stlink_interface_quit,
+	.speed = stlink_interface_speed,
+	.execute_queue = stlink_interface_execute_queue,
+};
diff --git a/src/jtag/stlink/stlink_interface.h b/src/jtag/stlink/stlink_interface.h
new file mode 100644
index 0000000..9b3f791
--- /dev/null
+++ b/src/jtag/stlink/stlink_interface.h
@@ -0,0 +1,53 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+#ifndef _STLINK_INTERFACE_
+#define _STLINK_INTERFACE_
+
+/** */
+struct target;
+/** */
+extern const char *stlink_transports[];
+
+struct stlink_interface_param_s {
+	/** */
+	char *device_desc;
+	/** */
+	char *serial;
+	/** */
+	uint16_t vid;
+	/** */
+	uint16_t pid;
+};
+
+struct stlink_interface_s {
+	/** */
+	struct stlink_interface_param_s param;
+	/** */
+	const struct stlink_layout *layout;
+	/** */
+	void *fd;
+};
+
+/** */
+int stlink_interface_open(void);
+/** */
+int stlink_interface_init_target(struct target *t);
+
+#endif
diff --git a/src/jtag/stlink/stlink_layout.c b/src/jtag/stlink/stlink_layout.c
new file mode 100644
index 0000000..dfcfbf4
--- /dev/null
+++ b/src/jtag/stlink/stlink_layout.c
@@ -0,0 +1,85 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* project specific includes */
+#include <jtag/interface.h>
+#include <transport/transport.h>
+#include <helper/time_support.h>
+
+#include <jtag/stlink/stlink_layout.h>
+#include <jtag/stlink/stlink_tcl.h>
+#include <jtag/stlink/stlink_interface.h>
+
+#define STLINK_LAYOUT_UNKNOWN	0
+#define STLINK_LAYOUT_SG	1
+#define STLINK_LAYOUT_USB	2
+
+static int stlink_layout_open(struct stlink_interface_s *stlink_if)
+{
+	int res;
+
+	LOG_DEBUG("stlink_layout_open");
+
+	stlink_if->fd = NULL;
+
+	res = stlink_if->layout->api->open(&stlink_if->param, &stlink_if->fd);
+
+	if (res != ERROR_OK) {
+		LOG_DEBUG("stlink_layout_open: failed");
+		return res;
+	}
+
+	return ERROR_OK;
+}
+
+static int stlink_layout_close(struct stlink_interface_s *stlink_if)
+{
+	return ERROR_OK;
+}
+
+static const struct stlink_layout stlink_layouts[] = {
+	{
+	 .name = "usb",
+	 .type = STLINK_LAYOUT_USB,
+	 .open = stlink_layout_open,
+	 .close = stlink_layout_close,
+	 .api = &stlink_layout_api,
+	 },
+	{.name = NULL, /* END OF TABLE */ },
+};
+
+/** */
+const struct stlink_layout *stlink_layout_get_list(void)
+{
+	return stlink_layouts;
+}
+
+int stlink_layout_init(struct stlink_interface_s *stlink_if)
+{
+	LOG_DEBUG("stlink_layout_init");
+
+	stlink_if->layout = &stlink_layouts[0];
+
+	return ERROR_OK;
+}
diff --git a/src/jtag/stlink/stlink_layout.h b/src/jtag/stlink/stlink_layout.h
new file mode 100644
index 0000000..46517a7
--- /dev/null
+++ b/src/jtag/stlink/stlink_layout.h
@@ -0,0 +1,81 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+#ifndef _STLINK_LAYOUT_H_
+#define _STLINK_LAYOUT_H_
+
+/** */
+struct stlink_interface_s;
+struct stlink_interface_param_s;
+
+/** */
+extern struct stlink_layout_api_s stlink_layout_api;
+
+/** */
+struct stlink_layout_api_s {
+	/** */
+	int (*open) (struct stlink_interface_param_s *param, void **fd);
+	/** */
+	int (*close) (void *fd);
+	/** */
+	int (*reset) (void *fd);
+	/** */
+	int (*run) (void *fd);
+	/** */
+	int (*halt) (void *fd);
+	/** */
+	int (*step) (void *fd);
+	/** */
+	int (*read_regs) (void *fd);
+	/** */
+	int (*read_reg) (void *fd, int num, uint32_t *val);
+	/** */
+	int (*write_reg) (void *fd, int num, uint32_t val);
+	/** */
+	int (*read_mem32) (void *handle, uint32_t addr, uint16_t len,
+			   uint32_t *buffer);
+	/** */
+	int (*write_mem32) (void *handle, uint32_t addr, uint16_t len,
+			    uint32_t *buffer);
+	/** */
+	int (*idcode) (void *fd, uint32_t *idcode);
+	/** */
+	enum target_state (*state) (void *fd);
+};
+
+/** */
+struct stlink_layout {
+	/** */
+	char *name;
+	/** */
+	int type;
+	/** */
+	int (*open) (struct stlink_interface_s *stlink_if);
+	/** */
+	int (*close) (struct stlink_interface_s *stlink_if);
+	/** */
+	struct stlink_layout_api_s *api;
+};
+
+/** */
+const struct stlink_layout *stlink_layout_get_list(void);
+/** */
+int stlink_layout_init(struct stlink_interface_s *stlink_if);
+
+#endif
diff --git a/src/jtag/stlink/stlink_tcl.c b/src/jtag/stlink/stlink_tcl.c
new file mode 100644
index 0000000..a73afa3
--- /dev/null
+++ b/src/jtag/stlink/stlink_tcl.c
@@ -0,0 +1,136 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* project specific includes */
+#include <jtag/interface.h>
+#include <transport/transport.h>
+#include <helper/time_support.h>
+
+static int jim_newtap_expected_id(Jim_Nvp *n, Jim_GetOptInfo *goi,
+				  struct jtag_tap *pTap)
+{
+	jim_wide w;
+	int e = Jim_GetOpt_Wide(goi, &w);
+	if (e != JIM_OK) {
+		Jim_SetResultFormatted(goi->interp, "option: %s bad parameter",
+				       n->name);
+		return e;
+	}
+
+	unsigned expected_len = sizeof(uint32_t) * pTap->expected_ids_cnt;
+	uint32_t *new_expected_ids = malloc(expected_len + sizeof(uint32_t));
+	if (new_expected_ids == NULL) {
+		Jim_SetResultFormatted(goi->interp, "no memory");
+		return JIM_ERR;
+	}
+
+	memcpy(new_expected_ids, pTap->expected_ids, expected_len);
+
+	new_expected_ids[pTap->expected_ids_cnt] = w;
+
+	free(pTap->expected_ids);
+	pTap->expected_ids = new_expected_ids;
+	pTap->expected_ids_cnt++;
+
+	return JIM_OK;
+}
+
+#define NTAP_OPT_EXPECTED_ID 0
+
+static int jim_stlink_newtap_cmd(Jim_GetOptInfo *goi)
+{
+	struct jtag_tap *pTap;
+	int x;
+	int e;
+	Jim_Nvp *n;
+	char *cp;
+	const Jim_Nvp opts[] = {
+		{.name = "-expected-id", .value = NTAP_OPT_EXPECTED_ID},
+		{.name = NULL, .value = -1},
+	};
+
+	pTap = calloc(1, sizeof(struct jtag_tap));
+	if (!pTap) {
+		Jim_SetResultFormatted(goi->interp, "no memory");
+		return JIM_ERR;
+	}
+
+	/*
+	 * we expect CHIP + TAP + OPTIONS
+	 * */
+	if (goi->argc < 3) {
+		Jim_SetResultFormatted(goi->interp,
+				       "Missing CHIP TAP OPTIONS ....");
+		free(pTap);
+		return JIM_ERR;
+	}
+	Jim_GetOpt_String(goi, &cp, NULL);
+	pTap->chip = strdup(cp);
+
+	Jim_GetOpt_String(goi, &cp, NULL);
+	pTap->tapname = strdup(cp);
+
+	/* name + dot + name + null */
+	x = strlen(pTap->chip) + 1 + strlen(pTap->tapname) + 1;
+	cp = malloc(x);
+	sprintf(cp, "%s.%s", pTap->chip, pTap->tapname);
+	pTap->dotted_name = cp;
+
+	LOG_DEBUG("Creating New Tap, Chip: %s, Tap: %s, Dotted: %s, %d params",
+		  pTap->chip, pTap->tapname, pTap->dotted_name, goi->argc);
+
+	while (goi->argc) {
+		e = Jim_GetOpt_Nvp(goi, opts, &n);
+		if (e != JIM_OK) {
+			Jim_GetOpt_NvpUnknown(goi, opts, 0);
+			free((void *)pTap->dotted_name);
+			free(pTap);
+			return e;
+		}
+		LOG_DEBUG("Processing option: %s", n->name);
+		switch (n->value) {
+		case NTAP_OPT_EXPECTED_ID:
+			e = jim_newtap_expected_id(n, goi, pTap);
+			if (JIM_OK != e) {
+				free((void *)pTap->dotted_name);
+				free(pTap);
+				return e;
+			}
+			break;
+		}		/* switch (n->value) */
+	}			/* while (goi->argc) */
+
+	/* default is enabled-after-reset */
+	pTap->enabled = !pTap->disabled_after_reset;
+
+	jtag_tap_init(pTap);
+	return JIM_OK;
+}
+
+int jim_stlink_newtap(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
+{
+	Jim_GetOptInfo goi;
+	Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+	return jim_stlink_newtap_cmd(&goi);
+}
diff --git a/src/jtag/stlink/stlink_tcl.h b/src/jtag/stlink/stlink_tcl.h
new file mode 100644
index 0000000..395d546
--- /dev/null
+++ b/src/jtag/stlink/stlink_tcl.h
@@ -0,0 +1,26 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+#ifndef _STLINK_TCL_
+#define _STLINK_TCL_
+
+/** */
+int jim_stlink_newtap(Jim_Interp *interp, int argc, Jim_Obj * const *argv);
+
+#endif
diff --git a/src/jtag/stlink/stlink_transport.c b/src/jtag/stlink/stlink_transport.c
new file mode 100644
index 0000000..6f16195
--- /dev/null
+++ b/src/jtag/stlink/stlink_transport.c
@@ -0,0 +1,180 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* project specific includes */
+#include <jtag/interface.h>
+#include <jtag/tcl.h>
+#include <transport/transport.h>
+#include <helper/time_support.h>
+#include <target/target.h>
+#include <jtag/stlink/stlink_tcl.h>
+#include <jtag/stlink/stlink_interface.h>
+
+COMMAND_HANDLER(stlink_transport_jtag_command)
+{
+	LOG_DEBUG("stlink_transport_jtag_command");
+
+	return ERROR_OK;
+}
+
+static const struct command_registration
+stlink_transport_stlink_subcommand_handlers[] = {
+	{
+	 .name = "newtap",
+	 .mode = COMMAND_CONFIG,
+	 .jim_handler = jim_stlink_newtap,
+	 .help = "Create a new TAP instance named basename.tap_type, "
+	 "and appends it to the scan chain.",
+	 .usage = "basename tap_type '-irlen' count "
+	 "['-expected_id' number] ",
+	 },
+
+	COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration
+stlink_transport_jtag_subcommand_handlers[] = {
+	{
+	 .name = "init",
+	 .mode = COMMAND_ANY,
+	 .handler = stlink_transport_jtag_command,
+	 },
+	{
+	 .name = "arp_init",
+	 .mode = COMMAND_ANY,
+	 .handler = stlink_transport_jtag_command,
+	 },
+	{
+	 .name = "arp_init-reset",
+	 .mode = COMMAND_ANY,
+	 .handler = stlink_transport_jtag_command,
+	 },
+	{
+	 .name = "tapisenabled",
+	 .mode = COMMAND_EXEC,
+	 .jim_handler = jim_jtag_tap_enabler,
+	 },
+	{
+	 .name = "tapenable",
+	 .mode = COMMAND_EXEC,
+	 .jim_handler = jim_jtag_tap_enabler,
+	 },
+	{
+	 .name = "tapdisable",
+	 .mode = COMMAND_EXEC,
+	 .handler = stlink_transport_jtag_command,
+	 },
+	{
+	 .name = "configure",
+	 .mode = COMMAND_EXEC,
+	 .handler = stlink_transport_jtag_command,
+	 },
+	{
+	 .name = "cget",
+	 .mode = COMMAND_EXEC,
+	 .jim_handler = jim_jtag_configure,
+	 },
+	{
+	 .name = "names",
+	 .mode = COMMAND_ANY,
+	 .handler = stlink_transport_jtag_command,
+	 },
+
+	COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration stlink_transport_command_handlers[] = {
+
+	{
+	 .name = "stlink",
+	 .mode = COMMAND_ANY,
+	 .help = "perform stlink actions",
+	 .chain = stlink_transport_stlink_subcommand_handlers,
+	 },
+	{
+	 .name = "jtag",
+	 .mode = COMMAND_ANY,
+	 .chain = stlink_transport_jtag_subcommand_handlers,
+	 },
+	COMMAND_REGISTRATION_DONE
+};
+
+static int stlink_transport_register_commands(struct command_context *cmd_ctx)
+{
+	return register_commands(cmd_ctx, NULL,
+				 stlink_transport_command_handlers);
+}
+
+static int stlink_transport_init(struct command_context *cmd_ctx)
+{
+	LOG_DEBUG("stlink_transport_init");
+	struct target *t = get_current_target(cmd_ctx);
+
+	if (!t) {
+		LOG_ERROR("stlink_transport_init: no current target");
+		return ERROR_FAIL;
+
+	}
+
+	stlink_interface_open();
+
+	return stlink_interface_init_target(t);
+}
+
+static int stlink_transport_select(struct command_context *ctx)
+{
+	LOG_DEBUG("stlink_transport_select");
+
+	int retval;
+
+	/* NOTE:  interface init must already have been done.
+	 * That works with only C code ... no Tcl glue required.
+	 */
+
+	retval = stlink_transport_register_commands(ctx);
+
+	if (retval != ERROR_OK)
+		return retval;
+
+	return ERROR_OK;
+}
+
+static struct transport stlink_transport = {
+	.name = "stlink",
+	.select = stlink_transport_select,
+	.init = stlink_transport_init,
+};
+
+const char *stlink_transports[] = { "stlink", NULL };
+
+static void stlink_constructor(void) __attribute__ ((constructor));
+static void stlink_constructor(void)
+{
+	transport_register(&stlink_transport);
+}
+
+bool transport_is_stlink(void)
+{
+	return get_current_transport() == &stlink_transport;
+}
diff --git a/src/jtag/stlink/stlink_transport.h b/src/jtag/stlink/stlink_transport.h
new file mode 100644
index 0000000..066b194
--- /dev/null
+++ b/src/jtag/stlink/stlink_transport.h
@@ -0,0 +1,23 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Mathias Kuester                                 *
+ *   Mathias Kuester <kesmtp@freenet.de>                                   *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+#ifndef _STLINK_TRANSPORT_
+#define _STLINK_TRANSPORT_
+
+#endif