- added support for FreeBSD ppi (parallel port access similar to /dev/parport on linux) (thanks to Darius for this patch)

- unified 'ftd2xx' and 'ftdi2232' into a single interface 'ft2232'. The library used to access the hardware is choosen during configure with --enable-ft2232_ftd2xx or --enable-ft2232-libftdi.


git-svn-id: svn://svn.berlios.de/openocd/trunk@83 b42882b7-edfa-0310-969c-e2dbd0fdcd60

7 files changed, 332 insertions, 814 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 2647fd5e..208041f1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -16,7 +16,7 @@ else
 MINGWLDADD =
 endif
 
-if FTDI2232
+if FT2232_LIBFTDI
 FTDI2232LIB = -lftdi
 else
 FTDI2232LIB =
@@ -32,7 +32,7 @@ else
 FTD2XXLDADD = -lftd2xx 
 endif
   
-if FTD2XX
+if FT2232_FTD2XX
 FTD2XXLIB = $(FTD2XXLDADD)
 else
 FTD2XXLIB =
diff --git a/src/jtag/Makefile.am b/src/jtag/Makefile.am
index bb9337aa..ec46111e 100644
--- a/src/jtag/Makefile.am
+++ b/src/jtag/Makefile.am
@@ -25,16 +25,16 @@ else
 PARPORTFILES =
 endif
 
-if FTDI2232
-FTDI2232FILES = ftdi2232.c
+if FT2232_LIBFTDI
+FT2232FILES = ft2232.c
 else
-FTDI2232FILES =
+FT2232FILES =
 endif
 
-if FTD2XX
-FTD2XXFILES = ftd2xx.c
+if FT2232_FTD2XX
+FT2232FILES = ft2232.c
 else
-FTD2XXFILES =
+FT2232FILES =
 endif
 
 if AMTJTAGACCEL
@@ -49,6 +49,6 @@ else
 EP93XXFILES =
 endif
 
-libjtag_a_SOURCES = jtag.c $(BITBANGFILES) $(PARPORTFILES) $(FTDI2232FILES) $(FTD2XXFILES) $(AMTJTAGACCELFILES) $(EP93XXFILES)
+libjtag_a_SOURCES = jtag.c $(BITBANGFILES) $(PARPORTFILES) $(FT2232FILES) $(AMTJTAGACCELFILES) $(EP93XXFILES)
 
 noinst_HEADERS = bitbang.h jtag.h
diff --git a/src/jtag/ftd2xx.c b/src/jtag/ft2232.c
index 050f9c04..64975825 100644
--- a/src/jtag/ftd2xx.c
+++ b/src/jtag/ft2232.c
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2004 by Dominic Rath                                    *
+ *   Copyright (C) 2004, 2006 by Dominic Rath                              *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -39,7 +39,13 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+
+/* FT2232 access library includes */
+#if BUILD_FT2232_FTD2XX == 1
 #include <ftd2xx.h>
+#elif BUILD_FT2232_LIBFTDI == 1
+#include <ftdi.h>
+#endif
 
 #include <sys/time.h>
 #include <time.h>
@@ -56,41 +62,35 @@
 #define _DEBUG_USB_COMMS_
 #endif
 
-/* enable this to work around ftd2xx deadlock
- */
-#if 0
-#define _FTD2XX_QUEUE_DELAY_
-#endif
-
-int ftd2xx_execute_queue(void);
+int ft2232_execute_queue(void);
 
-int ftd2xx_speed(int speed);
-int ftd2xx_register_commands(struct command_context_s *cmd_ctx);
-int ftd2xx_init(void);
-int ftd2xx_quit(void);
+int ft2232_speed(int speed);
+int ft2232_register_commands(struct command_context_s *cmd_ctx);
+int ft2232_init(void);
+int ft2232_quit(void);
 
-int ftd2xx_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int ftd2xx_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int ftd2xx_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
-char *ftd2xx_device_desc = NULL;
-char *ftd2xx_layout = NULL;
-u16 ftd2xx_vid = 0x0403;
-u16 ftd2xx_pid = 0x6010;
+char *ft2232_device_desc = NULL;
+char *ft2232_layout = NULL;
+u16 ft2232_vid = 0x0403;
+u16 ft2232_pid = 0x6010;
 
-typedef struct ftd2xx_layout_s
+typedef struct ft2232_layout_s
 {
 	char* name;
 	int(*init)(void);
 	void(*reset)(int trst, int srst);
-} ftd2xx_layout_t;
+} ft2232_layout_t;
 
 int usbjtag_init(void);
 int jtagkey_init(void);
 void usbjtag_reset(int trst, int srst);
 void jtagkey_reset(int trst, int srst);
 
-ftd2xx_layout_t ftd2xx_layouts[] =
+ft2232_layout_t ft2232_layouts[] =
 {
 	{"usbjtag", usbjtag_init, usbjtag_reset},
 	{"jtagkey", jtagkey_init, jtagkey_reset},
@@ -100,68 +100,138 @@ ftd2xx_layout_t ftd2xx_layouts[] =
 
 static u8 nTRST, nTRSTnOE, nSRST, nSRSTnOE;
 
-static ftd2xx_layout_t *layout;
+static ft2232_layout_t *layout;
 static u8 low_output = 0x0;
 static u8 low_direction = 0x0;
 static u8 high_output = 0x0;
 static u8 high_direction = 0x0;
+
+#if BUILD_FT2232_FTD2XX == 1
 static FT_HANDLE ftdih = NULL;
+#elif BUILD_FT2232_LIBFTDI == 1
+static struct ftdi_context ftdic;
+#endif
 
-static u8 *ftd2xx_buffer = NULL;
-static int ftd2xx_buffer_size = 0;
-static int ftd2xx_read_pointer = 0;
-static int ftd2xx_expect_read = 0;
-#define FTD2XX_BUFFER_SIZE	131072
-#define BUFFER_ADD ftd2xx_buffer[ftd2xx_buffer_size++]
-#define BUFFER_READ ftd2xx_buffer[ftd2xx_read_pointer++]
+static u8 *ft2232_buffer = NULL;
+static int ft2232_buffer_size = 0;
+static int ft2232_read_pointer = 0;
+static int ft2232_expect_read = 0;
+#define FT2232_BUFFER_SIZE	131072
+#define BUFFER_ADD ft2232_buffer[ft2232_buffer_size++]
+#define BUFFER_READ ft2232_buffer[ft2232_read_pointer++]
 
-jtag_interface_t ftd2xx_interface = 
+jtag_interface_t ft2232_interface = 
 {
 	
-	.name = "ftd2xx",
+	.name = "ft2232",
 	
-	.execute_queue = ftd2xx_execute_queue,
+	.execute_queue = ft2232_execute_queue,
 	
 	.support_statemove = 1,
 	
-	.speed = ftd2xx_speed,
-	.register_commands = ftd2xx_register_commands,
-	.init = ftd2xx_init,
-	.quit = ftd2xx_quit,
+	.speed = ft2232_speed,
+	.register_commands = ft2232_register_commands,
+	.init = ft2232_init,
+	.quit = ft2232_quit,
 };
 
-int ftd2xx_speed(int speed)
+int ft2232_write(u8 *buf, int size, u32* bytes_written)
 {
-	u8 buf[3];
+#if BUILD_FT2232_FTD2XX == 1
 	FT_STATUS status;
-	DWORD bytes_written;
+	DWORD dw_bytes_written;
+	if ((status = FT_Write(ftdih, buf, size, &dw_bytes_written)) != FT_OK)
+	{
+		*bytes_written = dw_bytes_written;
+		ERROR("FT_Write returned: %i", status);
+		return ERROR_JTAG_DEVICE_ERROR;
+	}
+	else
+	{
+		*bytes_written = dw_bytes_written;
+		return ERROR_OK;	
+	}
+#elif BUILD_FT2232_LIBFTDI == 1
+	int retval;
+	if ((retval = ftdi_write_data(&ftdic, buf, size)) < 0)
+	{
+		*bytes_written = 0;
+		ERROR("ftdi_write_data: %s", ftdi_get_error_string(&ftdic));
+		return ERROR_JTAG_DEVICE_ERROR;
+	}
+	else
+	{
+		*bytes_written = retval;
+		return ERROR_OK;	
+	}
+#endif
+}
+
+int ft2232_read(u8* buf, int size, u32* bytes_read)
+{
+#if BUILD_FT2232_FTD2XX == 1
+	DWORD dw_bytes_read;
+	FT_STATUS status;
+	if ((status = FT_Read(ftdih, buf, size, &dw_bytes_read)) != FT_OK)
+	{
+		*bytes_read = dw_bytes_read; 
+		ERROR("FT_Read returned: %i", status);
+		return ERROR_JTAG_DEVICE_ERROR;
+	}
+	*bytes_read = dw_bytes_read; 
+	return ERROR_OK;	
+
+#elif BUILD_FT2232_LIBFTDI == 1
+	int retval;
+	int timeout = 100;
+	*bytes_read = 0;
+	
+	while ((*bytes_read < size) && timeout--)
+	{
+		if ((retval = ftdi_read_data(&ftdic, buf + *bytes_read, size - *bytes_read)) < 0)
+		{
+			*bytes_read = 0;
+			ERROR("ftdi_read_data: %s", ftdi_get_error_string(&ftdic));
+			return ERROR_JTAG_DEVICE_ERROR;
+		}
+		*bytes_read += retval;
+	}
+	return ERROR_OK;	
+#endif
+}
+
+int ft2232_speed(int speed)
+{
+	u8 buf[3];
+	int retval;
+	u32 bytes_written;
 
 	buf[0] = 0x86; /* command "set divisor" */
 	buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=1.5MHz, ...*/
 	buf[2] = (speed >> 8) & 0xff; /* valueH */
 	
 	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
-	if (((status = FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
+	if (((retval = ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
-		return status;
+		ERROR("couldn't set FT2232 TCK speed");
+		return retval;
 	}
 	
 	return ERROR_OK;
 }
 
-int ftd2xx_register_commands(struct command_context_s *cmd_ctx)
+int ft2232_register_commands(struct command_context_s *cmd_ctx)
 {
-	register_command(cmd_ctx, NULL, "ftd2xx_device_desc", ftd2xx_handle_device_desc_command,
+	register_command(cmd_ctx, NULL, "ft2232_device_desc", ft2232_handle_device_desc_command,
 		COMMAND_CONFIG, NULL);
-	register_command(cmd_ctx, NULL, "ftd2xx_layout", ftd2xx_handle_layout_command,
+	register_command(cmd_ctx, NULL, "ft2232_layout", ft2232_handle_layout_command,
 		COMMAND_CONFIG, NULL);
-	register_command(cmd_ctx, NULL, "ftd2xx_vid_pid", ftd2xx_handle_vid_pid_command,
+	register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
 					 COMMAND_CONFIG, NULL);
 	return ERROR_OK;
 }
 
-void ftd2xx_end_state(state)
+void ft2232_end_state(state)
 {
 	if (tap_move_map[state] != -1)
 		end_state = state;
@@ -172,7 +242,7 @@ void ftd2xx_end_state(state)
 	}
 }
 
-void ftd2xx_read_scan(enum scan_type type, u8* buffer, int scan_size)
+void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
 {
 	int num_bytes = ((scan_size + 7) / 8);
 	int bits_left = scan_size;
@@ -196,15 +266,15 @@ void ftd2xx_read_scan(enum scan_type type, u8* buffer, int scan_size)
 
 }
 
-void ftd2xx_debug_dump_buffer(void)
+void ft2232_debug_dump_buffer(void)
 {
 	int i;
 	char line[256];
 	char *line_p = line;
 	
-	for (i = 0; i < ftd2xx_buffer_size; i++)
+	for (i = 0; i < ft2232_buffer_size; i++)
 	{
-		line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ftd2xx_buffer[i]);
+		line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ft2232_buffer[i]);
 		if (i % 16 == 15)
 		{
 			DEBUG("%s", line);
@@ -216,15 +286,15 @@ void ftd2xx_debug_dump_buffer(void)
 		DEBUG("%s", line);
 }
 
-int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
+int ft2232_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 {
 	jtag_command_t *cmd;
 	u8 *buffer;
 	int scan_size;
 	enum scan_type type;
-	FT_STATUS status;
-	DWORD bytes_written;
-	DWORD bytes_read;
+	int retval;
+	u32 bytes_written;
+	u32 bytes_read;
 	
 #ifdef _DEBUG_USB_IO_
 	struct timeval start, inter, inter2, end;
@@ -232,17 +302,17 @@ int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 #endif
 
 #ifdef _DEBUG_USB_COMMS_
-	DEBUG("write buffer (size %i):", ftd2xx_buffer_size);
-	ftd2xx_debug_dump_buffer();
+	DEBUG("write buffer (size %i):", ft2232_buffer_size);
+	ft2232_debug_dump_buffer();
 #endif
 
 #ifdef _DEBUG_USB_IO_
 	gettimeofday(&start, NULL);	
 #endif
 
-	if ((status = FT_Write(ftdih, ftd2xx_buffer, ftd2xx_buffer_size, &bytes_written)) != FT_OK)
+	if ((retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written)) != ERROR_OK)
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
+		ERROR("couldn't write MPSSE commands to FT2232");
 		exit(-1);
 	}
 	
@@ -250,32 +320,21 @@ int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 	gettimeofday(&inter, NULL);	
 #endif
 	
-	if (ftd2xx_expect_read)
+	if (ft2232_expect_read)
 	{
 		int timeout = 100;
-		ftd2xx_buffer_size = 0;
-		
-#ifdef _FTD2XX_QUEUE_DELAY_
-		DWORD inrxqueue = 0;
-		while (inrxqueue < ftd2xx_expect_read)
-		{
-			FT_GetQueueStatus(ftdih, &inrxqueue);
-			if (inrxqueue >= ftd2xx_expect_read)
-				break;
-			usleep(1000);
-		};
-#endif
+		ft2232_buffer_size = 0;
 		
 #ifdef _DEBUG_USB_IO_
-	gettimeofday(&inter2, NULL);	
+		gettimeofday(&inter2, NULL);	
 #endif
-			
-		if ((status = FT_Read(ftdih, ftd2xx_buffer, ftd2xx_expect_read, &bytes_read)) != FT_OK)
+		
+		if ((retval = ft2232_read(ft2232_buffer, ft2232_expect_read, &bytes_read)) != ERROR_OK)
 		{
-			ERROR("couldn't read from ftdi device: %i", status);
+			ERROR("couldn't read from FT2232");
 			exit(-1);
 		}
-
+		
 #ifdef _DEBUG_USB_IO_
 		gettimeofday(&end, NULL);	
 
@@ -287,24 +346,24 @@ int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 #endif
 	
 		
-		ftd2xx_buffer_size = bytes_read;
+		ft2232_buffer_size = bytes_read;
 		
-		if (ftd2xx_expect_read != ftd2xx_buffer_size)
+		if (ft2232_expect_read != ft2232_buffer_size)
 		{
-			ERROR("ftd2xx_expect_read (%i) != ftd2xx_buffer_size (%i) (%i retries)", ftd2xx_expect_read, ftd2xx_buffer_size, 100 - timeout);
-			ftd2xx_debug_dump_buffer();	
+			ERROR("ft2232_expect_read (%i) != ft2232_buffer_size (%i) (%i retries)", ft2232_expect_read, ft2232_buffer_size, 100 - timeout);
+			ft2232_debug_dump_buffer();	
 
 			exit(-1);
 		}
 
 #ifdef _DEBUG_USB_COMMS_
-		DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ftd2xx_buffer_size);
-		ftd2xx_debug_dump_buffer();
+		DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ft2232_buffer_size);
+		ft2232_debug_dump_buffer();
 #endif
 	}
 
-	ftd2xx_expect_read = 0;
-	ftd2xx_read_pointer = 0;
+	ft2232_expect_read = 0;
+	ft2232_read_pointer = 0;
 
 	cmd = first;
 	while (cmd != last)
@@ -317,7 +376,7 @@ int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 				{
 					scan_size = jtag_scan_size(cmd->cmd.scan);
 					buffer = calloc(CEIL(scan_size, 8), 1);
-					ftd2xx_read_scan(type, buffer, scan_size);
+					ft2232_read_scan(type, buffer, scan_size);
 					jtag_read_buffer(buffer, cmd->cmd.scan);
 					free(buffer);
 				}
@@ -328,12 +387,12 @@ int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
 		cmd = cmd->next;
 	}
 	
-	ftd2xx_buffer_size = 0;
+	ft2232_buffer_size = 0;
 
 	return ERROR_OK;
 }
 
-void ftd2xx_add_pathmove(pathmove_command_t *cmd)
+void ft2232_add_pathmove(pathmove_command_t *cmd)
 {
 	int num_states = cmd->num_states;
 	u8 tms_byte;
@@ -373,7 +432,7 @@ void ftd2xx_add_pathmove(pathmove_command_t *cmd)
 	end_state = cur_state;
 }
 
-void ftd2xx_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
+void ft2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
 {
 	int num_bytes = (scan_size + 7) / 8;
 	int bits_left = scan_size;
@@ -490,7 +549,7 @@ void ftd2xx_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size
 
 }
 
-int ftd2xx_predict_scan_out(int scan_size, enum scan_type type)
+int ft2232_predict_scan_out(int scan_size, enum scan_type type)
 {
 	int predicted_size = 3;
 	
@@ -515,7 +574,7 @@ int ftd2xx_predict_scan_out(int scan_size, enum scan_type type)
 	return predicted_size;
 }
 
-int ftd2xx_predict_scan_in(int scan_size, enum scan_type type)
+int ft2232_predict_scan_in(int scan_size, enum scan_type type)
 {
 	int predicted_size = 0;
 	
@@ -614,7 +673,7 @@ void jtagkey_reset(int trst, int srst)
 	DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
 }
 
-int ftd2xx_execute_queue()
+int ft2232_execute_queue()
 {
 	jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
 	jtag_command_t *first_unsent = cmd;	/* next command that has to be sent */
@@ -625,8 +684,8 @@ int ftd2xx_execute_queue()
 	int predicted_size = 0;
 	int require_send = 0;
 
-	ftd2xx_buffer_size = 0;
-	ftd2xx_expect_read = 0;
+	ft2232_buffer_size = 0;
+	ft2232_expect_read = 0;
 
 	while (cmd)
 	{
@@ -634,14 +693,14 @@ int ftd2xx_execute_queue()
 		{
 			case JTAG_END_STATE:
 				if (cmd->cmd.end_state->end_state != -1)
-					ftd2xx_end_state(cmd->cmd.end_state->end_state);
+					ft2232_end_state(cmd->cmd.end_state->end_state);
 				break;
 			case JTAG_RESET:
 				/* only send the maximum buffer size that FT2232C can handle */
 				predicted_size = 3;
-				if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
+				if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
 				{
-					ftd2xx_send_and_recv(first_unsent, cmd);
+					ft2232_send_and_recv(first_unsent, cmd);
 					require_send = 0;
 					first_unsent = cmd;
 				}
@@ -663,9 +722,9 @@ int ftd2xx_execute_queue()
 					predicted_size += 3;
 				if ((cmd->cmd.runtest->end_state == -1) && (end_state != TAP_RTI))
 					predicted_size += 3;
-				if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
+				if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
 				{
-					ftd2xx_send_and_recv(first_unsent, cmd);
+					ft2232_send_and_recv(first_unsent, cmd);
 					require_send = 0;
 					first_unsent = cmd;
 				}
@@ -694,7 +753,7 @@ int ftd2xx_execute_queue()
 					//DEBUG("added TMS scan (no read)");
 				}
 				if (cmd->cmd.runtest->end_state != -1)
-					ftd2xx_end_state(cmd->cmd.runtest->end_state);
+					ft2232_end_state(cmd->cmd.runtest->end_state);
 				if (cur_state != end_state)
 				{
 					/* command "Clock Data to TMS/CS Pin (no Read)" */
@@ -714,14 +773,14 @@ int ftd2xx_execute_queue()
 			case JTAG_STATEMOVE:
 				/* only send the maximum buffer size that FT2232C can handle */
 				predicted_size = 3;
-				if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
+				if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
 				{
-					ftd2xx_send_and_recv(first_unsent, cmd);
+					ft2232_send_and_recv(first_unsent, cmd);
 					require_send = 0;
 					first_unsent = cmd;
 				}
 				if (cmd->cmd.statemove->end_state != -1)
-					ftd2xx_end_state(cmd->cmd.statemove->end_state);
+					ft2232_end_state(cmd->cmd.statemove->end_state);
 				/* command "Clock Data to TMS/CS Pin (no Read)" */
 				BUFFER_ADD = 0x4b;
 				/* scan 7 bit */
@@ -738,13 +797,13 @@ int ftd2xx_execute_queue()
 			case JTAG_PATHMOVE:
 				/* only send the maximum buffer size that FT2232C can handle */
 				predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
-				if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
+				if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
 				{
-					ftd2xx_send_and_recv(first_unsent, cmd);
+					ft2232_send_and_recv(first_unsent, cmd);
 					require_send = 0;
 					first_unsent = cmd;
 				}
-				ftd2xx_add_pathmove(cmd->cmd.pathmove);
+				ft2232_add_pathmove(cmd->cmd.pathmove);
 				require_send = 1;
 #ifdef _DEBUG_JTAG_IO_				
 				DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
@@ -753,19 +812,19 @@ int ftd2xx_execute_queue()
 			case JTAG_SCAN:
 				scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
 				type = jtag_scan_type(cmd->cmd.scan);
-				predicted_size = ftd2xx_predict_scan_out(scan_size, type);
-				if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
+				predicted_size = ft2232_predict_scan_out(scan_size, type);
+				if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
 				{
 					DEBUG("ftd2xx buffer size reached, sending queued commands (first_unsent: %x, cmd: %x)", first_unsent, cmd);
-					ftd2xx_send_and_recv(first_unsent, cmd);
+					ft2232_send_and_recv(first_unsent, cmd);
 					require_send = 0;
 					first_unsent = cmd;
 				}
-				ftd2xx_expect_read += ftd2xx_predict_scan_in(scan_size, type);
-				//DEBUG("new read size: %i", ftd2xx_expect_read);
+				ft2232_expect_read += ft2232_predict_scan_in(scan_size, type);
+				//DEBUG("new read size: %i", ft2232_expect_read);
 				if (cmd->cmd.scan->end_state != -1)
-					ftd2xx_end_state(cmd->cmd.scan->end_state);
-				ftd2xx_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
+					ft2232_end_state(cmd->cmd.scan->end_state);
+				ft2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
 				require_send = 1;
 				if (buffer)
 					free(buffer);
@@ -774,7 +833,7 @@ int ftd2xx_execute_queue()
 #endif
 				break;
 			case JTAG_SLEEP:
-				ftd2xx_send_and_recv(first_unsent, cmd);
+				ft2232_send_and_recv(first_unsent, cmd);
 				first_unsent = cmd->next;
 				jtag_sleep(cmd->cmd.sleep->us);
 #ifdef _DEBUG_JTAG_IO_				
@@ -789,30 +848,33 @@ int ftd2xx_execute_queue()
 	}
 
 	if (require_send > 0)
-		ftd2xx_send_and_recv(first_unsent, cmd);
+		ft2232_send_and_recv(first_unsent, cmd);
 
 	return ERROR_OK;
 }
 
-int ftd2xx_init(void)
+int ft2232_init(void)
 {
 	u8 latency_timer;
-	FT_STATUS status;
-	DWORD num_devices;
 	u8 buf[1];
-	DWORD bytes_written;
+	int retval;
+	u32 bytes_written;
 	
-	ftd2xx_layout_t *cur_layout = ftd2xx_layouts;
+#if BUILD_FT2232_FTD2XX == 1
+	FT_STATUS status;
+#endif
+
+	ft2232_layout_t *cur_layout = ft2232_layouts;
 	
-	if ((ftd2xx_layout == NULL) || (ftd2xx_layout[0] == 0))
+	if ((ft2232_layout == NULL) || (ft2232_layout[0] == 0))
 	{
-		ftd2xx_layout = "usbjtag";
-		WARNING("No ftd2xx layout specified, using default 'usbjtag'");
+		ft2232_layout = "usbjtag";
+		WARNING("No ft2232 layout specified, using default 'usbjtag'");
 	}
 	
 	while (cur_layout->name)
 	{
-		if (strcmp(cur_layout->name, ftd2xx_layout) == 0)
+		if (strcmp(cur_layout->name, ft2232_layout) == 0)
 		{
 			layout = cur_layout;
 			break;
@@ -822,26 +884,36 @@ int ftd2xx_init(void)
 
 	if (!layout)
 	{
-		ERROR("No matching layout found for %s", ftd2xx_layout);
+		ERROR("No matching layout found for %s", ft2232_layout);
 		return ERROR_JTAG_INIT_FAILED;
 	}
 	
-	if (ftd2xx_device_desc == NULL)
+#if BUILD_FT2232_FTD2XX == 1
+	DEBUG("'ft2232' interface using FTD2XX with '%s' layout", ft2232_layout);
+#elif BUILD_FT2232_LIBFTDI == 1
+	DEBUG("'ft2232' interface using libftdi with '%s' layout", ft2232_layout);
+#endif
+		
+	if (ft2232_device_desc == NULL)
 	{
 		WARNING("no ftd2xx device description specified, using default 'Dual RS232'");
-		ftd2xx_device_desc = "Dual RS232";
+		ft2232_device_desc = "Dual RS232";
 	}
-	
+
+#if BUILD_FT2232_FTD2XX == 1
+
 #if IS_WIN32 == 0
-	/* Add JTAGkey Vid/Pid to the linux driver */
-	if ((status = FT_SetVIDPID(ftd2xx_vid, ftd2xx_pid)) != FT_OK)
+	/* Add non-standard Vid/Pid to the linux driver */
+	if ((status = FT_SetVIDPID(ft2232_vid, ft2232_pid)) != FT_OK)
 	{
-		WARNING("couldn't add %4.4x:%4.4x", ftd2xx_vid, ftd2xx_pid);
+		WARNING("couldn't add %4.4x:%4.4x", ft2232_vid, ft2232_pid);
 	}
 #endif
 
-	if ((status = FT_OpenEx(ftd2xx_device_desc, FT_OPEN_BY_DESCRIPTION, &ftdih)) != FT_OK)
+	if ((status = FT_OpenEx(ft2232_device_desc, FT_OPEN_BY_DESCRIPTION, &ftdih)) != FT_OK)
 	{
+		DWORD num_devices;
+		
 		ERROR("unable to open ftdi device: %i", status);
 		status = FT_ListDevices(&num_devices, NULL, FT_LIST_NUMBER_ONLY);
 		if (status == FT_OK)
@@ -894,27 +966,74 @@ int ftd2xx_init(void)
 		ERROR("unable to enable bit i/o mode: %i", status);
 		return ERROR_JTAG_INIT_FAILED;
 	}
+#elif BUILD_FT2232_LIBFTDI == 1
+	if (ftdi_init(&ftdic) < 0)
+		return ERROR_JTAG_INIT_FAILED;
+
+	/* context, vendor id, product id */
+	if (ftdi_usb_open(&ftdic, ft2232_vid, ft2232_pid) < 0)
+	{
+		ERROR("unable to open ftdi device: %s", ftdic.error_str);
+		return ERROR_JTAG_INIT_FAILED;
+	}
+
+	if (ftdi_usb_reset(&ftdic) < 0)
+	{
+		ERROR("unable to reset ftdi device");
+		return ERROR_JTAG_INIT_FAILED;
+	}
+
+	if (ftdi_set_latency_timer(&ftdic, 2) < 0)
+	{
+		ERROR("unable to set latency timer");
+		return ERROR_JTAG_INIT_FAILED;
+	}
+	
+	if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0)
+	{
+		ERROR("unable to get latency timer");
+		return ERROR_JTAG_INIT_FAILED;
+	}
+	else
+	{
+		DEBUG("current latency timer: %i", latency_timer);
+	}
+
+	ftdic.bitbang_mode = 0; /* Reset controller */
+	ftdi_enable_bitbang(&ftdic, 0x0b); /* ctx, JTAG I/O mask */
 
-	ftd2xx_buffer_size = 0;
-	ftd2xx_buffer = malloc(FTD2XX_BUFFER_SIZE);
+	ftdic.bitbang_mode = 2; /* MPSSE mode */
+	ftdi_enable_bitbang(&ftdic, 0x0b); /* ctx, JTAG I/O mask */
+#endif	
+
+	ft2232_buffer_size = 0;
+	ft2232_buffer = malloc(FT2232_BUFFER_SIZE);
 
 	if (layout->init() != ERROR_OK)
 		return ERROR_JTAG_INIT_FAILED;
 
-	ftd2xx_speed(jtag_speed);
+	ft2232_speed(jtag_speed);
 
 	buf[0] = 0x85; /* Disconnect TDI/DO to TDO/DI for Loopback */
-	if (((status = FT_Write(ftdih, buf, 1, &bytes_written)) != FT_OK) || (bytes_written != 1))
+	if (((retval = ft2232_write(buf, 1, &bytes_written)) != ERROR_OK) || (bytes_written != 1))
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
+		ERROR("couldn't write to FT2232 to disable loopback");
 		return ERROR_JTAG_INIT_FAILED;
 	}
-	
+
+#if BUILD_FT2232_FTD2XX == 1
 	if ((status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
 	{
 		ERROR("error purging ftd2xx device: %i", status);
 		return ERROR_JTAG_INIT_FAILED;
 	}
+#elif BUILD_FT2232_LIBFTDI == 1
+	if (ftdi_usb_purge_buffers(&ftdic) < 0)
+	{
+		ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
+		return ERROR_JTAG_INIT_FAILED;
+	}
+#endif	
 
 	return ERROR_OK;
 }
@@ -922,8 +1041,7 @@ int ftd2xx_init(void)
 int usbjtag_init(void)
 {
 	u8 buf[3];
-	FT_STATUS status;
-	DWORD bytes_written;
+	u32 bytes_written;
 	
 	low_output = 0x08;
 	low_direction = 0x0b;
@@ -961,9 +1079,9 @@ int usbjtag_init(void)
 	buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
 	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 	
-	if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
+	if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
+		ERROR("couldn't initialize FT2232 with 'USBJTAG' layout"); 
 		return ERROR_JTAG_INIT_FAILED;
 	}
 
@@ -973,8 +1091,7 @@ int usbjtag_init(void)
 int jtagkey_init(void)
 {
 	u8 buf[3];
-	FT_STATUS status;
-	DWORD bytes_written;
+	u32 bytes_written;
 	
 	low_output = 0x08;
 	low_direction = 0x1b;
@@ -985,9 +1102,9 @@ int jtagkey_init(void)
 	buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
 	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 	
-	if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
+	if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
+		ERROR("couldn't initialize FT2232 with 'JTAGkey' layout"); 
 		return ERROR_JTAG_INIT_FAILED;
 	}
 	
@@ -1042,61 +1159,69 @@ int jtagkey_init(void)
 	buf[2] = high_direction;   /* all outputs (xRST and xRSTnOE) */
 	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
 	
-	if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
+	if (((ft2232_write(buf, 3, &bytes_written)) != ERROR_OK) || (bytes_written != 3))
 	{
-		ERROR("couldn't write to ftdi device: %i", status);
+		ERROR("couldn't initialize FT2232 with 'JTAGkey' layout"); 
 		return ERROR_JTAG_INIT_FAILED;
 	}
 	
 	return ERROR_OK;
 }
 
-int ftd2xx_quit(void)
+int ft2232_quit(void)
 {
+#if BUILD_FT2232_FTD2XX == 1
 	FT_STATUS status;
 
 	status = FT_Close(ftdih);
+#elif BUILD_FT2232_LIBFTDI == 1
+	ftdi_disable_bitbang(&ftdic);
+	
+	ftdi_usb_close(&ftdic);
+	
+	ftdi_deinit(&ftdic);
+#endif
 
-	free(ftd2xx_buffer);
+	free(ft2232_buffer);
 
 	return ERROR_OK;
 }
 
-int ftd2xx_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
 	if (argc == 1)
 	{
-		ftd2xx_device_desc = strdup(args[0]);
+		ft2232_device_desc = strdup(args[0]);
 	}
 	else
 	{
-		ERROR("expected exactly one argument to ftd2xx_device_desc <description>");
+		ERROR("expected exactly one argument to ft2232_device_desc <description>");
 	}
 	
 	return ERROR_OK;
 }
 
-int ftd2xx_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
 	if (argc == 0)
 		return ERROR_OK;
 
-	ftd2xx_layout = malloc(strlen(args[0]) + 1);
-	strcpy(ftd2xx_layout, args[0]);
+	ft2232_layout = malloc(strlen(args[0]) + 1);
+	strcpy(ft2232_layout, args[0]);
 
 	return ERROR_OK;
 }
 
-int ftd2xx_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
 	if (argc >= 2)
 	{
-		ftd2xx_vid = strtol(args[0], NULL, 0);
-		ftd2xx_pid = strtol(args[1], NULL, 0);
+		ft2232_vid = strtol(args[0], NULL, 0);
+		ft2232_pid = strtol(args[1], NULL, 0);
 	}
 	else
 	{
-		WARNING("incomplete ftd2xx_vid_pid configuration directive");
+		WARNING("incomplete ft2232_vid_pid configuration directive");
 	}
 	
 	return ERROR_OK;
diff --git a/src/jtag/ftdi2232.c b/src/jtag/ftdi2232.c
deleted file mode 100644
index c90cc2f9..00000000
--- a/src/jtag/ftdi2232.c
+++ /dev/null
@@ -1,633 +0,0 @@
-/***************************************************************************
- *   Copyright (C) 2004 by Dominic Rath                                    *
- *   Dominic.Rath@gmx.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 "log.h"
-#include "types.h"
-#include "jtag.h"
-#include "configuration.h"
-#include "command.h"
-
-/* system includes */
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <usb.h>
-#include <ftdi.h>
-
-#include <sys/time.h>
-#include <time.h>
-
-/* enable this to debug io latency
- */
-#if 0
-#define _DEBUG_USB_IO_
-#endif
-
-int ftdi2232_execute_queue(void);
-
-int ftdi2232_speed(int speed);
-int ftdi2232_register_commands(struct command_context_s *cmd_ctx);
-int ftdi2232_init(void);
-int ftdi2232_quit(void);
-
-enum { FTDI2232_TRST = 0x10, FTDI2232_SRST = 0x40 };
-static u8 discrete_output = 0x0 | FTDI2232_TRST | FTDI2232_SRST;
-static struct ftdi_context ftdic;
-
-static u8 *ftdi2232_buffer = NULL;
-static int ftdi2232_buffer_size = 0;
-static int ftdi2232_read_pointer = 0;
-static int ftdi2232_expect_read = 0;
-#define FTDI2232_BUFFER_SIZE	131072
-#define BUFFER_ADD ftdi2232_buffer[ftdi2232_buffer_size++]
-#define BUFFER_READ ftdi2232_buffer[ftdi2232_read_pointer++]
-
-#define FTDI2232_SAVE_SIZE	1024
-
-int ftdi2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
-static u16 ftdi2232_vid = 0x0403;
-static u16 ftdi2232_pid = 0x6010;
-
-jtag_interface_t ftdi2232_interface = 
-{
-	
-	.name = "ftdi2232",
-	
-	.execute_queue = ftdi2232_execute_queue,
-	
-	.support_statemove = 1,
-	
-	.speed = ftdi2232_speed,
-	.register_commands = ftdi2232_register_commands,
-	.init = ftdi2232_init,
-	.quit = ftdi2232_quit,
-};
-
-int ftdi2232_speed(int speed)
-{
-	u8 buf[3];
-
-	buf[0] = 0x86; /* command "set divisor" */
-	buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=1.5MHz, ...*/
-	buf[2] = (speed >> 8) & 0xff; /* valueH */
-	
-	DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
-	ftdi_write_data(&ftdic, buf, 3);
-
-	return ERROR_OK;
-}
-
-int ftdi2232_register_commands(struct command_context_s *cmd_ctx)
-{
-	register_command(cmd_ctx, NULL, "ftdi2232_vid_pid", ftdi2232_handle_vid_pid_command,
-		COMMAND_CONFIG, NULL);
-	
-	return ERROR_OK;
-}
-
-void ftdi2232_end_state(state)
-{
-	if (tap_move_map[state] != -1)
-		end_state = state;
-	else
-	{
-		ERROR("BUG: %i is not a valid end state", state);
-		exit(-1);
-	}
-}
-
-void ftdi2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
-{
-	int num_bytes = ((scan_size + 7) / 8);
-	int bits_left = scan_size;
-	int cur_byte = 0;
-
-	while(num_bytes-- > 1)
-	{
-		buffer[cur_byte] = BUFFER_READ;
-		cur_byte++;
-		bits_left -= 8;
-	}
-
-	buffer[cur_byte] = 0x0;
-
-	if (bits_left > 1)
-	{
-		buffer[cur_byte] = BUFFER_READ >> 1;
-	}
-
-	buffer[cur_byte] = (buffer[cur_byte] | ((BUFFER_READ & 0x02) << 6)) >> (8 - bits_left);
-
-}
-
-void ftdi2232_debug_dump_buffer(void)
-{
-	int i;
-	for (i = 0; i < ftdi2232_buffer_size; i++)
-	{
-		printf("%2.2x ", ftdi2232_buffer[i]);
-		if (i % 16 == 15)
-			printf("\n");
-	}
-	printf("\n");
-	fflush(stdout);
-}
-
-int ftdi2232_send_and_recv(jtag_command_t *first, jtag_command_t *last)
-{
-	jtag_command_t *cmd;
-	u8 *buffer;
-	int scan_size;
-	enum scan_type type;
-	int retval;
-
-	BUFFER_ADD = 0x87;	/* send immediate command */
-	
-	if (ftdi2232_buffer_size > FTDI2232_SAVE_SIZE)
-	{
-		ERROR("BUG: ftdi2232_buffer grew beyond %i byte (%i) - this is going to fail", FTDI2232_SAVE_SIZE,  ftdi2232_buffer_size);
-	}
-
-#ifdef _DEBUG_USB_IO_
-	DEBUG("write buffer (size %i):", ftdi2232_buffer_size);
-	ftdi2232_debug_dump_buffer();
-#endif
-
-	if ((retval = ftdi_write_data(&ftdic, ftdi2232_buffer, ftdi2232_buffer_size)) < 0)
-	{
-		ERROR("ftdi_write_data returned %i", retval);
-		exit(-1);
-	}
-
-	if (ftdi2232_expect_read)
-	{
-		int timeout = 100;
-		ftdi2232_buffer_size = 0;
-		
-		while ((ftdi2232_buffer_size < ftdi2232_expect_read) && timeout)
-		{
-			ftdi2232_buffer_size += ftdi_read_data(&ftdic, ftdi2232_buffer + ftdi2232_buffer_size, FTDI2232_BUFFER_SIZE - ftdi2232_buffer_size);
-			timeout--;
-		}
-
-		if (ftdi2232_expect_read != ftdi2232_buffer_size)
-		{
-			ERROR("ftdi2232_expect_read (%i) != ftdi2232_buffer_size (%i) (%i retries)", ftdi2232_expect_read, ftdi2232_buffer_size, 100 - timeout);
-			ftdi2232_debug_dump_buffer();
-
-			exit(-1);
-		}
-
-#ifdef _DEBUG_USB_IO_
-		DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ftdi2232_buffer_size);
-		ftdi2232_debug_dump_buffer();	
-#endif
-	}
-
-	ftdi2232_expect_read = 0;
-	ftdi2232_read_pointer = 0;
-
-	cmd = first;
-	while (cmd != last)
-	{
-		switch (cmd->type)
-		{
-			case JTAG_SCAN:
-				type = jtag_scan_type(cmd->cmd.scan);
-				if (type != SCAN_OUT)
-				{
-					scan_size = jtag_scan_size(cmd->cmd.scan);
-					buffer = calloc(CEIL(scan_size, 8), 1);
-					ftdi2232_read_scan(type, buffer, scan_size);
-					jtag_read_buffer(buffer, cmd->cmd.scan);
-					free(buffer);
-				}
-				break;
-			default:
-				break;
-		}
-		cmd = cmd->next;
-	}
-	
-	ftdi2232_buffer_size = 0;
-
-	return ERROR_OK;
-}
-
-void ftdi2232_add_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size)
-{
-	int num_bytes = (scan_size + 7) / 8;
-	int bits_left = scan_size;
-	int cur_byte = 0;
-	int last_bit;
-
-	/* command "Clock Data to TMS/CS Pin (no Read)" */
-	BUFFER_ADD = 0x4b;
-	/* scan 7 bit */
-	BUFFER_ADD = 0x6;
-	/* TMS data bits */
-	if (ir_scan)
-	{
-		BUFFER_ADD = TAP_MOVE(cur_state, TAP_SI);
-		cur_state = TAP_SI;
-	}
-	else
-	{
-		BUFFER_ADD = TAP_MOVE(cur_state, TAP_SD);
-		cur_state = TAP_SD;
-	}
-	//DEBUG("added TMS scan (no read)");
-
-	/* add command for complete bytes */
-	if (num_bytes > 1)
-	{
-		if (type == SCAN_IO)
-		{
-			/* Clock Data Bytes In and Out LSB First */
-			BUFFER_ADD = 0x39;
-			//DEBUG("added TDI bytes (io %i)", num_bytes);
-		}
-		else if (type == SCAN_OUT)
-		{
-			/* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
-			BUFFER_ADD = 0x19;
-			//DEBUG("added TDI bytes (o)");
-		}
-		else if (type == SCAN_IN)
-		{
-			/* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
-			BUFFER_ADD = 0x28;
-			//DEBUG("added TDI bytes (i %i)", num_bytes);
-		}
-		BUFFER_ADD = (num_bytes-2) & 0xff;
-		BUFFER_ADD = ((num_bytes-2) >> 8) & 0xff;
-	}
-	if (type != SCAN_IN)
-	{
-		/* add complete bytes */
-		while(num_bytes-- > 1)
-		{
-			BUFFER_ADD = buffer[cur_byte];
-			cur_byte++;
-			bits_left -= 8;
-		}
-	}
-	if (type == SCAN_IN)
-	{
-		bits_left -= 8 * (num_bytes - 1);
-	}
-
-	/* the most signifcant bit is scanned during TAP movement */
-	if (type != SCAN_IN)
-		last_bit = (buffer[cur_byte] >> (bits_left - 1)) & 0x1;
-	else
-		last_bit = 0;
-
-	/* process remaining bits but the last one */
-	if (bits_left > 1)
-	{
-		if (type == SCAN_IO)
-		{
-			/* Clock Data Bits In and Out LSB First */
-			BUFFER_ADD = 0x3b;
-			//DEBUG("added TDI bits (io) %i", bits_left - 1);
-		}
-		else if (type == SCAN_OUT)
-		{
-			/* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
-			BUFFER_ADD = 0x1b;
-			//DEBUG("added TDI bits (o)");
-		}
-		else if (type == SCAN_IN)
-		{
-			/* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
-			BUFFER_ADD = 0x2a;
-			//DEBUG("added TDI bits (i %i)", bits_left - 1);
-		}
-		BUFFER_ADD = bits_left - 2;
-		if (type != SCAN_IN)
-			BUFFER_ADD = buffer[cur_byte];
-	}
-
-	/* move from Shift-IR/DR to end state */
-	if (type != SCAN_OUT)
-	{
-		/* Clock Data to TMS/CS Pin with Read */
-		BUFFER_ADD = 0x6b;
-		//DEBUG("added TMS scan (read)");
-	}
-	else
-	{
-		/* Clock Data to TMS/CS Pin (no Read) */
-		BUFFER_ADD = 0x4b;
-		//DEBUG("added TMS scan (no read)");
-	}
-	BUFFER_ADD = 0x6;
-	BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
-	cur_state = end_state;
-
-}
-
-int ftdi2232_predict_scan_out(int scan_size, enum scan_type type)
-{
-	int predicted_size = 6;
-	if (type == SCAN_IN)	/* only from device to host */
-	{
-		predicted_size += (CEIL(scan_size, 8) > 1) ? 3 : 0;
-		predicted_size += ((scan_size - 1) % 8) ? 2 : 0;
-	}
-	else					/* host to device, or bidirectional */
-	{
-		predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) + 3 - 1) : 0;
-		predicted_size += ((scan_size - 1) % 8) ? 3 : 0;
-	}
-
-	return predicted_size;
-}
-
-int ftdi2232_predict_scan_in(int scan_size, enum scan_type type)
-{
-	int predicted_size = 0;
-	
-	if (type != SCAN_OUT)
-	{
-		/* complete bytes */
-		predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) - 1) : 0;
-		/* remaining bits - 1 */
-		predicted_size += ((scan_size - 1) % 8) ? 1 : 0;
-		/* last bit (from TMS scan) */
-		predicted_size += 1;
-	}
-	
-	//DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size);
-
-	return predicted_size;
-}
-
-int ftdi2232_execute_queue()
-{
-	jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
-	jtag_command_t *first_unsent = cmd;	/* next command that has to be sent */
-	u8 *buffer;
-	int scan_size;	/* size of IR or DR scan */
-	enum scan_type type;
-	int i;
-	int predicted_size = 0;
-	int require_send = 0;
-
-	ftdi2232_buffer_size = 0;
-	ftdi2232_expect_read = 0;
-
-	while (cmd)
-	{
-		switch(cmd->type)
-		{
-			case JTAG_END_STATE:
-				if (cmd->cmd.end_state->end_state != -1)
-					ftdi2232_end_state(cmd->cmd.end_state->end_state);
-				break;
-			case JTAG_RESET:
-				/* only send the maximum buffer size that FT2232C can handle */
-				predicted_size = 3;
-				if (ftdi2232_buffer_size + predicted_size + 1 > FTDI2232_SAVE_SIZE)
-				{
-					ftdi2232_send_and_recv(first_unsent, cmd);
-					require_send = 0;
-					first_unsent = cmd;
-				}
-
-				if (cmd->cmd.reset->trst == 1)
-				{
-					cur_state = TAP_TLR;
-					discrete_output &= ~FTDI2232_TRST;
-				}
-				else if (cmd->cmd.reset->trst == 0)
-				{
-					discrete_output |= FTDI2232_TRST;
-				}
-
-				if (cmd->cmd.reset->srst == 1)
-					discrete_output &= ~FTDI2232_SRST;
-				else if (cmd->cmd.reset->srst == 0)
-					discrete_output |= FTDI2232_SRST;
-				/* command "set data bits low byte" */
-				BUFFER_ADD = 0x80;
-				/* value (TMS=1,TCK=0, TDI=0, TRST/SRST */
-				BUFFER_ADD = 0x08 | discrete_output;
-				/* dir (output=1), TCK/TDI/TMS=out, TDO=in, TRST/SRST=out */
-				BUFFER_ADD = 0x0b | FTDI2232_SRST | FTDI2232_TRST;
-				require_send = 1;
-				break;
-			case JTAG_RUNTEST:
-				/* only send the maximum buffer size that FT2232C can handle */
-				predicted_size = 0;
-				if (cur_state != TAP_RTI)
-					predicted_size += 3;
-				predicted_size += 3 * CEIL(cmd->cmd.runtest->num_cycles, 7);
-				if ((cmd->cmd.runtest->end_state != -1) && (cmd->cmd.runtest->end_state != TAP_RTI))
-					predicted_size += 3;
-				if ((cmd->cmd.runtest->end_state == -1) && (end_state != TAP_RTI))
-					predicted_size += 3;
-				if (ftdi2232_buffer_size + predicted_size + 1 > FTDI2232_SAVE_SIZE)
-				{
-					ftdi2232_send_and_recv(first_unsent, cmd);
-					require_send = 0;
-					first_unsent = cmd;
-				}
-				if (cur_state != TAP_RTI)
-				{
-					/* command "Clock Data to TMS/CS Pin (no Read)" */
-					BUFFER_ADD = 0x4b;
-					/* scan 7 bit */
-					BUFFER_ADD = 0x6;
-					/* TMS data bits */
-					BUFFER_ADD = TAP_MOVE(cur_state, TAP_RTI);
-					cur_state = TAP_RTI;
-					require_send = 1;
-				}
-				i = cmd->cmd.runtest->num_cycles;
-				while (i > 0)
-				{
-					/* command "Clock Data to TMS/CS Pin (no Read)" */
-					BUFFER_ADD = 0x4b;
-					/* scan 7 bit */
-					BUFFER_ADD = (i > 7) ? 6 : (i - 1);
-					/* TMS data bits */
-					BUFFER_ADD = 0x0;
-					cur_state = TAP_RTI;
-					i -= (i > 7) ? 7 : i;
-					//DEBUG("added TMS scan (no read)");
-				}
-				if (cmd->cmd.runtest->end_state != -1)
-					ftdi2232_end_state(cmd->cmd.runtest->end_state);
-				if (cur_state != end_state)
-				{
-					/* command "Clock Data to TMS/CS Pin (no Read)" */
-					BUFFER_ADD = 0x4b;
-					/* scan 7 bit */
-					BUFFER_ADD = 0x6;
-					/* TMS data bits */
-					BUFFER_ADD = TAP_MOVE(cur_state, end_state);
-					cur_state = end_state;
-					//DEBUG("added TMS scan (no read)");
-				}
-				require_send = 1;
-				break;
-			case JTAG_STATEMOVE:
-				/* only send the maximum buffer size that FT2232C can handle */
-				predicted_size = 3;
-				if (ftdi2232_buffer_size + predicted_size + 1 > FTDI2232_SAVE_SIZE)
-				{
-					ftdi2232_send_and_recv(first_unsent, cmd);
-					require_send = 0;
-					first_unsent = cmd;
-				}
-				if (cmd->cmd.statemove->end_state != -1)
-					ftdi2232_end_state(cmd->cmd.statemove->end_state);
-				/* command "Clock Data to TMS/CS Pin (no Read)" */
-				BUFFER_ADD = 0x4b;
-				/* scan 7 bit */
-				BUFFER_ADD = 0x6;
-				/* TMS data bits */
-				BUFFER_ADD = TAP_MOVE(cur_state, end_state);
-				//DEBUG("added TMS scan (no read)");
-				cur_state = end_state;
-				require_send = 1;
-				break;
-			case JTAG_SCAN:
-				scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
-				type = jtag_scan_type(cmd->cmd.scan);
-				predicted_size = ftdi2232_predict_scan_out(scan_size, type);
-				if (ftdi2232_buffer_size + predicted_size + 1 > FTDI2232_SAVE_SIZE)
-				{
-					ftdi2232_send_and_recv(first_unsent, cmd);
-					require_send = 0;
-					first_unsent = cmd;
-				}
-				ftdi2232_expect_read += ftdi2232_predict_scan_in(scan_size, type);
-				//DEBUG("new read size: %i", ftdi2232_expect_read);
-				if (cmd->cmd.scan->end_state != -1)
-					ftdi2232_end_state(cmd->cmd.scan->end_state);
-				ftdi2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
-				require_send = 1;
-				if (buffer)
-					free(buffer);
-				break;
-			case JTAG_SLEEP:
-				jtag_sleep(cmd->cmd.sleep->us);
-				break;
-			default:
-				ERROR("BUG: unknown JTAG command type encountered");
-				exit(-1);
-		}
-		cmd = cmd->next;
-	}
-
-	if (require_send > 0)
-		ftdi2232_send_and_recv(first_unsent, cmd);
-
-	return ERROR_OK;
-}
-
-int ftdi2232_init(void)
-{
-	if (ftdi_init(&ftdic) < 0)
-		return ERROR_JTAG_INIT_FAILED;
-
-	/* context, vendor id, product id */
-	if (ftdi_usb_open(&ftdic, ftdi2232_vid, ftdi2232_pid) < 0)
-	{
-		ERROR("unable to open ftdi device: %s", ftdic.error_str);
-		return ERROR_JTAG_INIT_FAILED;
-	}
-
-	if (ftdi_usb_reset(&ftdic) < 0)
-	{
-		ERROR("unable to reset ftdi device");
-		return ERROR_JTAG_INIT_FAILED;
-	}
-
-	if (ftdi_set_latency_timer(&ftdic, 1) < 0)
-	{
-		ERROR("unable to set latency timer");
-		return ERROR_JTAG_INIT_FAILED;
-	}
-
-	ftdi2232_buffer_size = 0;
-	ftdi2232_buffer = malloc(FTDI2232_BUFFER_SIZE);
-
-	ftdic.bitbang_mode = 0; /* Reset controller */
-	ftdi_enable_bitbang(&ftdic, 0x0b | FTDI2232_SRST | FTDI2232_TRST); /* ctx, i/o mask (out=1, in=0) */
-
-	ftdic.bitbang_mode = 2; /* MPSSE mode */
-	ftdi_enable_bitbang(&ftdic, 0x0b | FTDI2232_SRST | FTDI2232_TRST); /* ctx, i/o mask (out=1, in=0) */
-	
-	if (ftdi_usb_purge_buffers(&ftdic) < 0)
-	{
-		ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
-		return ERROR_JTAG_INIT_FAILED;
-	}
-
-	/* initialize low byte for jtag */
-	BUFFER_ADD = 0x80; /* command "set data bits low byte" */
-	BUFFER_ADD = 0x08 | FTDI2232_SRST | FTDI2232_TRST; /* value (TMS=1,TCK=0, TDI=0, xRST high) */
-	BUFFER_ADD = 0x0b | FTDI2232_SRST | FTDI2232_TRST; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
-	BUFFER_ADD = 0x85; /* command "Disconnect TDI/DO to TDO/DI for Loopback" */
-	ftdi2232_debug_dump_buffer();
-	if (ftdi_write_data(&ftdic, ftdi2232_buffer, ftdi2232_buffer_size) != 4)
-		return ERROR_JTAG_INIT_FAILED;
-
-	ftdi2232_speed(jtag_speed);
-
-	return ERROR_OK;
-}
-
-int ftdi2232_quit(void)
-{
-	ftdi_disable_bitbang(&ftdic);
-	
-	ftdi_usb_close(&ftdic);
-	
-	ftdi_deinit(&ftdic);
-
-	free(ftdi2232_buffer);
-
-	return ERROR_OK;
-}
-
-int ftdi2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
-	if (argc >= 2)
-	{
-		ftdi2232_vid = strtol(args[0], NULL, 0);
-		ftdi2232_pid = strtol(args[1], NULL, 0);
-	}
-	else
-	{
-		WARNING("incomplete ftdi2232_vid_pid configuration directive");
-	}
-	
-	return ERROR_OK;
-}
diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index 0ffeb56e..a60aacd0 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -124,12 +124,12 @@ jtag_event_callback_t *jtag_event_callbacks;
 	extern jtag_interface_t parport_interface;
 #endif
 
-#if BUILD_FTDI2232 == 1
-	extern jtag_interface_t ftdi2232_interface;
+#if BUILD_FT2232_FTD2XX == 1
+	extern jtag_interface_t ft2232_interface;
 #endif
 
-#if BUILD_FTD2XX == 1
-	extern jtag_interface_t ftd2xx_interface;
+#if BUILD_FT2232_LIBFTDI == 1
+	extern jtag_interface_t ft2232_interface;
 #endif
 
 #if BUILD_AMTJTAGACCEL == 1
@@ -144,11 +144,11 @@ jtag_interface_t *jtag_interfaces[] = {
 #if BUILD_PARPORT == 1
 	&parport_interface,
 #endif
-#if BUILD_FTDI2232 == 1
-	&ftdi2232_interface,
+#if BUILD_FT2232_FTD2XX == 1
+	&ft2232_interface,
 #endif
-#if BUILD_FTD2XX == 1
-	&ftd2xx_interface,
+#if BUILD_FT2232_LIBFTDI == 1
+	&ft2232_interface,
 #endif
 #if BUILD_AMTJTAGACCEL == 1
 	&amt_jtagaccel_interface,
@@ -1119,7 +1119,9 @@ int jtag_validate_chain()
 	{
 		if (buf_get_u32(ir_test, chain_pos, 2) != 0x1)
 		{
-			ERROR("Error validating JTAG scan chain, IR mismatch");
+			char *cbuf = buf_to_char(ir_test, total_ir_length);
+			ERROR("Error validating JTAG scan chain, IR mismatch, scan returned %s", cbuf);
+			free(cbuf);
 			exit(-1);
 		}
 		chain_pos += device->ir_length;
@@ -1128,7 +1130,9 @@ int jtag_validate_chain()
 	
 	if (buf_get_u32(ir_test, chain_pos, 2) != 0x3)
 	{
-		ERROR("Error validating JTAG scan chain, IR mismatch");
+		char *cbuf = buf_to_char(ir_test, total_ir_length);
+		ERROR("Error validating JTAG scan chain, IR mismatch, scan returned %s", cbuf);
+		free(cbuf);
 		exit(-1);
 	}
 	
@@ -1217,6 +1221,12 @@ int jtag_init(struct command_context_s *cmd_ctx)
 	 * didn't match one of the compiled-in interfaces
 	 */
 	ERROR("No valid jtag interface found (%s)", jtag_interface);
+	ERROR("compiled-in jtag interfaces:");
+	for (i = 0; jtag_interfaces[i]; i++)
+	{
+		ERROR("%i: %s", i, jtag_interfaces[i]->name);
+	}
+	
 	jtag = NULL;
 	return ERROR_JTAG_INVALID_INTERFACE;
 }
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index f7630a5e..0d71301f 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -270,4 +270,5 @@ extern int jtag_register_event_callback(int (*callback)(enum jtag_event event, v
 #define ERROR_JTAG_QUEUE_FAILED			(-104)
 #define ERROR_JTAG_RESET_WOULD_ASSERT_TRST		(-105)
 #define ERROR_JTAG_RESET_CANT_SRST				(-106)
+#define ERROR_JTAG_DEVICE_ERROR			(-107)
 #endif /* JTAG_H */
diff --git a/src/jtag/parport.c b/src/jtag/parport.c
index 21aa5131..4b0b193c 100644
--- a/src/jtag/parport.c
+++ b/src/jtag/parport.c
@@ -51,8 +51,15 @@
 #include <stdio.h>
 
 #if PARPORT_USE_PPDEV == 1
+#ifdef __FreeBSD__
+#include <dev/ppbus/ppi.h>
+#include <dev/ppbus/ppbconf.h>
+#define PPRSTATUS	PPIGSTATUS
+#define PPWDATA		PPISDATA
+#else
 #include <linux/parport.h>
 #include <linux/ppdev.h>
+#endif
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #endif
@@ -310,11 +317,17 @@ int parport_init(void)
 		return ERROR_JTAG_INIT_FAILED;
 	}
 
+#ifdef __FreeBSD__
+	DEBUG("opening /dev/ppi%d...", parport_port);
+
+	snprintf(buffer, 256, "/dev/ppi%d", parport_port);
+	device_handle = open(buffer, O_WRONLY);
+#else
 	DEBUG("opening /dev/parport%d...", parport_port);
 
 	snprintf(buffer, 256, "/dev/parport%d", parport_port);
 	device_handle = open(buffer, O_WRONLY);
-	
+#endif	
 	if (device_handle<0)
 	{
 		ERROR("cannot open device. check it exists and that user read and write rights are set");
@@ -323,6 +336,7 @@ int parport_init(void)
 
 	DEBUG("...open");
 
+#ifndef __FreeBSD__
 	i=ioctl(device_handle, PPCLAIM);
 	if (i<0)
 	{
@@ -345,6 +359,7 @@ int parport_init(void)
 		ERROR("cannot set compatible 1284 mode to device");
 		return ERROR_JTAG_INIT_FAILED;
 	}
+#endif
 #else
 	if (parport_port == 0)
 	{