[usb-driver] / jtagkey.c

#include <stdio.h>
#include <ftdi.h>
#include <unistd.h>
#include <pthread.h>
#include "usb-driver.h"
#include "config.h"
#include "jtagkey.h"

#define USBBUFSIZE 1048576
#define JTAG_SPEED 100000
#define SLOW_AND_SAFE 1

static struct ftdi_context ftdic;
static unsigned char bitbang_mode;

static int jtagkey_init(unsigned short vid, unsigned short pid) {
	int ret = 0;
	unsigned char c;

	if ((ret = ftdi_init(&ftdic)) != 0) {
		fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}
	
	if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
		fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
		fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
		fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE))  != 0) {
		fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE))  != 0) {
		fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_set_latency_timer(&ftdic, 1))  != 0) {
		fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	c = 0x00;
	ftdi_write_data(&ftdic, &c, 1);

	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB))  != 0) {
		fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	if ((ret = ftdi_set_baudrate(&ftdic, JTAG_SPEED))  != 0) {
		fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	bitbang_mode = BITMODE_SYNCBB;

	if ((ret = ftdi_usb_purge_buffers(&ftdic))  != 0) {
		fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	return ret;
}

int jtagkey_open(int num) {
	int ret;

	ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));

	if (ret >= 0)
		ret = 0xff;

	return ret;
}

void jtagkey_close(int handle) {
	if (handle == 0xff) {
		ftdi_disable_bitbang(&ftdic);
		ftdi_usb_close(&ftdic);
		ftdi_deinit(&ftdic);
	}
}

#ifndef SLOW_AND_SAFE
static int jtagkey_set_bbmode(unsigned char mode) {
	int ret = 0;

	if (bitbang_mode != mode) {
		DPRINTF("switching bitbang-mode!\n");

		/* Wait for the latency-timer to kick in */
		usleep(2);
		if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, mode))  != 0) {
			fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
			return ret;
		}
		if ((ret = ftdi_usb_purge_buffers(&ftdic))  != 0) {
			fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
			return ret;
		}
		/* Wait for the FTDI2232 to settle */
		usleep(2);

		bitbang_mode = mode;
	}

	return ret;
}
#endif

void jtagkey_state(unsigned char data) {
	fprintf(stderr,"Pins high: ");

	if (data & JTAGKEY_TCK)
		fprintf(stderr,"TCK ");

	if (data & JTAGKEY_TDI)
		fprintf(stderr,"TDI ");

	if (data & JTAGKEY_TDO)
		fprintf(stderr,"TDO ");

	if (data & JTAGKEY_TMS)
		fprintf(stderr,"TMS ");

	if (data & JTAGKEY_VREF)
		fprintf(stderr,"VREF ");
	
	fprintf(stderr,"\n");
}

struct jtagkey_reader_arg {
	int		num;
	unsigned char	*buf;
};

static void *jtagkey_reader(void *thread_arg) {
	struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg;

	int i;

	i = 0;
	DPRINTF("reader for %d bytes\n", arg->num);
	while (i < arg->num) {
		i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i);
	}
	
	pthread_exit(NULL);
}

/* TODO: Interpret JTAG commands and transfer in MPSSE mode */
int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
	int ret = 0;
	int i;
	int nread = 0;
	unsigned long port;
	unsigned char val;
	static unsigned char last_data = 0;
	static unsigned char last_write = 0x00;
	static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
	static unsigned char readbuf[USBBUFSIZE], *readpos;
	unsigned char data, prev_data, last_cyc_write;
	struct jtagkey_reader_arg targ;
	pthread_t reader_thread;

	/* Count reads */
	for (i = 0; i < num; i++)
		if (tr[i].cmdTrans == PP_READ)
			nread++;

	/* Write combining */
	if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) {
		unsigned char *pos = writebuf;
		int len;

		DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);

#ifndef SLOW_AND_SAFE
		jtagkey_set_bbmode(BITMODE_BITBANG);
#endif
#ifdef SLOW_AND_SAFE
		targ.num = writepos-pos;
		targ.buf = readbuf;
		pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
#endif
		while (pos < writepos) {
			len = writepos-pos;

			if (len > USBBUFSIZE)
				len = USBBUFSIZE;

			DPRINTF("combined write of %d/%d\n",len,writepos-pos);
			ftdi_write_data(&ftdic, pos, len);
			pos += len;
		}
#ifdef SLOW_AND_SAFE
		pthread_join(reader_thread, NULL);
#endif

		writepos = writebuf;
	}

	last_cyc_write = last_write;

	for (i = 0; i < num; i++) {
		DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
				(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
				tr[i].fAutoinc, tr[i].dwOptions);

		port = (unsigned long)tr[i].dwPort;
		val = tr[i].Data.Byte;

#ifdef DEBUG
		if (tr[i].cmdTrans == 13)
			DPRINTF("write byte: %d\n", val);
#endif

		/* Pad writebuf for read-commands in stream */
		*writepos = last_data;
		prev_data = last_data;

		if (port == ppbase + PP_DATA) {
			DPRINTF("data port\n");

			data = 0x00;
			switch(tr[i].cmdTrans) {
				case PP_READ:
					ret = 0; /* We don't support reading of the data port */
					break;

				case PP_WRITE:
					if (val & PP_TDI) {
						data |= JTAGKEY_TDI;
						DPRINTF("TDI\n");
					} else {
						DPRINTF("!TDI\n");
					}
					if (val & PP_TCK) {
						data |= JTAGKEY_TCK;
						DPRINTF("TCK\n");
					} else {
						DPRINTF("!TCK\n");
					}
					if (val & PP_TMS) {
						data |= JTAGKEY_TMS;
						DPRINTF("TMS\n");
					} else {
						DPRINTF("!TMS\n");
					}
					if (val & PP_CTRL) {
						data = JTAGKEY_OEn;
						DPRINTF("CTRL\n");
					} else {
						DPRINTF("!CTRL\n");
					}

					if (val & PP_PROG) {
						DPRINTF("PROG\n");
					} else {
						DPRINTF("!PROG\n");
					}

					*writepos = data;

					last_data = data;
					last_write = val;
					break;

				default:
					fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
					ret = -1;
					break;
			}
		}

		if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1))
			writepos++;
	}

	if (nread)
	{
		DPRINTF("writing %d bytes\n", writepos-writebuf);

		*writepos = last_data;
		writepos++;

#ifndef SLOW_AND_SAFE
		jtagkey_set_bbmode(BITMODE_SYNCBB);
#endif
		targ.num = writepos-writebuf;
		targ.buf = readbuf;
		pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
		ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
		pthread_join(reader_thread, NULL);

#ifdef DEBUG
		DPRINTF("write: ");
		hexdump(writebuf, writepos-writebuf);
		DPRINTF("read: ");
		hexdump(readbuf, i);
#endif

		writepos = writebuf;
	} else {
		return ret;
	}

	readpos = readbuf;
	last_write = last_cyc_write;

	for (i = 0; i < num; i++) {
		DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
				(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
				tr[i].fAutoinc, tr[i].dwOptions);

		port = (unsigned long)tr[i].dwPort;
		val = tr[i].Data.Byte;

		if ((tr[i].cmdTrans != PP_READ) && (val == last_write) && (i != num-1))
			continue;

		readpos++;

		if (port == ppbase + PP_DATA) {
			if (tr[i].cmdTrans == PP_WRITE) {
				last_write = val;
			}
		} else if (port == ppbase + PP_STATUS) {
			DPRINTF("status port (last write: 0x%x)\n", last_write);
			switch(tr[i].cmdTrans) {
				case PP_READ:
					data = *readpos;

#ifdef DEBUG
					DPRINTF("READ: 0x%x\n", data);
					jtagkey_state(data);
#endif

					val = 0x00;
					if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
						val |= PP_TDO;

					if (~last_write & PP_PROG)
						val |= 0x08;

					if (last_write & 0x40)
						val |= 0x20;
					else
						val |= 0x80;
					break;

				case PP_WRITE:
					ret = 0; /* Status Port is readonly */
					break;

				default:
					fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
					ret = -1;
					break;
			}
		} else {
			ret = 0;
		}

		tr[i].Data.Byte = val;

		DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
				(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
				tr[i].fAutoinc, tr[i].dwOptions);
#ifdef DEBUG
		if (tr[i].cmdTrans == 10)
			DPRINTF("read byte: %d\n", tr[i].Data.Byte);
#endif
	}

	return ret;
}
Commit	Line	Data
8121bc50	1	#include <stdio.h>
8121bc50	2	#include <ftdi.h>
9640dec9	3	#include <unistd.h>
3cc5a0bc	4	#include <pthread.h>
8121bc50	5	#include "usb-driver.h"
5e3d963b	6	#include "config.h"
8121bc50	7	#include "jtagkey.h"
8121bc50	8
3cc5a0bc	9	#define USBBUFSIZE 1048576
66c1fd53	10	#define JTAG_SPEED 100000
75417531	11	#define SLOW_AND_SAFE 1
d0e2002d	12
8121bc50	13	static struct ftdi_context ftdic;
9640dec9	14	static unsigned char bitbang_mode;
8121bc50	15
5e3d963b	16	static int jtagkey_init(unsigned short vid, unsigned short pid) {
8121bc50	17	int ret = 0;
d0e2002d	18	unsigned char c;
8121bc50	19
	20	if ((ret = ftdi_init(&ftdic)) != 0) {
	21	fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	22	return ret;
	23	}
	24
	25	if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
	26	fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	27	return ret;
	28	}
	29
	30	if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
	31	fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	32	return ret;
	33	}
	34
	35	if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
	36	fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	37	return ret;
	38	}
	39
3cc5a0bc	40	if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
	41	fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	42	return ret;
	43	}
4af4753d	44
3cc5a0bc	45	if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
3cc5a0bc	46	fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
8121bc50	47	return ret;
	48	}
	49
	50	if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) {
	51	fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	52	return ret;
	53	}
	54
d0e2002d	55	c = 0x00;
	56	ftdi_write_data(&ftdic, &c, 1);
	57
75417531	58	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) {
8121bc50	59	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	60	return ret;
	61	}
	62
66c1fd53	63	if ((ret = ftdi_set_baudrate(&ftdic, JTAG_SPEED)) != 0) {
	64	fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	65	return ret;
	66	}
	67
75417531	68	bitbang_mode = BITMODE_SYNCBB;
9640dec9	69
8121bc50	70	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	71	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	72	return ret;
	73	}
	74
	75	return ret;
	76	}
	77
5e3d963b	78	int jtagkey_open(int num) {
	79	int ret;
	80
	81	ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));
	82
	83	if (ret >= 0)
	84	ret = 0xff;
	85
	86	return ret;
	87	}
	88
	89	void jtagkey_close(int handle) {
	90	if (handle == 0xff) {
	91	ftdi_disable_bitbang(&ftdic);
	92	ftdi_usb_close(&ftdic);
	93	ftdi_deinit(&ftdic);
	94	}
8121bc50	95	}
8121bc50	96
3cc5a0bc	97	#ifndef SLOW_AND_SAFE
9640dec9	98	static int jtagkey_set_bbmode(unsigned char mode) {
	99	int ret = 0;
	100
	101	if (bitbang_mode != mode) {
	102	DPRINTF("switching bitbang-mode!\n");
59b06a85	103
9640dec9	104	/* Wait for the latency-timer to kick in */
	105	usleep(2);
	106	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, mode)) != 0) {
	107	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	108	return ret;
	109	}
	110	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	111	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	112	return ret;
	113	}
	114	/* Wait for the FTDI2232 to settle */
	115	usleep(2);
	116
	117	bitbang_mode = mode;
	118	}
	119
	120	return ret;
	121	}
3cc5a0bc	122	#endif
9640dec9	123
8121bc50	124	void jtagkey_state(unsigned char data) {
	125	fprintf(stderr,"Pins high: ");
	126
	127	if (data & JTAGKEY_TCK)
	128	fprintf(stderr,"TCK ");
	129
	130	if (data & JTAGKEY_TDI)
	131	fprintf(stderr,"TDI ");
	132
	133	if (data & JTAGKEY_TDO)
	134	fprintf(stderr,"TDO ");
	135
	136	if (data & JTAGKEY_TMS)
	137	fprintf(stderr,"TMS ");
	138
	139	if (data & JTAGKEY_VREF)
	140	fprintf(stderr,"VREF ");
	141
	142	fprintf(stderr,"\n");
	143	}
	144
3cc5a0bc	145	struct jtagkey_reader_arg {
	146	int num;
	147	unsigned char *buf;
	148	};
	149
	150	static void jtagkey_reader(void thread_arg) {
	151	struct jtagkey_reader_arg arg = (struct jtagkey_reader_arg)thread_arg;
	152
	153	int i;
	154
	155	i = 0;
	156	DPRINTF("reader for %d bytes\n", arg->num);
	157	while (i < arg->num) {
	158	i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i);
	159	}
	160
	161	pthread_exit(NULL);
	162	}
	163
617583d0	164	/* TODO: Interpret JTAG commands and transfer in MPSSE mode */
8121bc50	165	int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
	166	int ret = 0;
	167	int i;
d0e2002d	168	int nread = 0;
8121bc50	169	unsigned long port;
8121bc50	170	unsigned char val;
d0e2002d	171	static unsigned char last_data = 0;
e81047b8	172	static unsigned char last_write = 0x00;
d0e2002d	173	static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
d0e2002d	174	static unsigned char readbuf[USBBUFSIZE], *readpos;
617583d0	175	unsigned char data, prev_data, last_cyc_write;
3cc5a0bc	176	struct jtagkey_reader_arg targ;
3cc5a0bc	177	pthread_t reader_thread;
d0e2002d	178
e81047b8	179	/* Count reads */
d0e2002d	180	for (i = 0; i < num; i++)
e81047b8	181	if (tr[i].cmdTrans == PP_READ)
d0e2002d	182	nread++;
	183
	184	/* Write combining */
	185	if ((writepos-writebuf > sizeof(writebuf)-num) \|\| (nread && writepos-writebuf)) {
4af4753d	186	unsigned char *pos = writebuf;
4af4753d	187	int len;
3cc5a0bc	188
d0e2002d	189	DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
d0e2002d	190
75417531	191	#ifndef SLOW_AND_SAFE
9640dec9	192	jtagkey_set_bbmode(BITMODE_BITBANG);
3cc5a0bc	193	#endif
	194	#ifdef SLOW_AND_SAFE
	195	targ.num = writepos-pos;
	196	targ.buf = readbuf;
	197	pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
75417531	198	#endif
4af4753d	199	while (pos < writepos) {
85690a3f	200	len = writepos-pos;
85690a3f	201
3cc5a0bc	202	if (len > USBBUFSIZE)
3cc5a0bc	203	len = USBBUFSIZE;
d0e2002d	204
4af4753d	205	DPRINTF("combined write of %d/%d\n",len,writepos-pos);
	206	ftdi_write_data(&ftdic, pos, len);
	207	pos += len;
e81047b8	208	}
3cc5a0bc	209	#ifdef SLOW_AND_SAFE
	210	pthread_join(reader_thread, NULL);
	211	#endif
4af4753d	212
d0e2002d	213	writepos = writebuf;
d0e2002d	214	}
8121bc50	215
617583d0	216	last_cyc_write = last_write;
617583d0	217
8121bc50	218	for (i = 0; i < num; i++) {
	219	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	220	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	221	tr[i].fAutoinc, tr[i].dwOptions);
	222
	223	port = (unsigned long)tr[i].dwPort;
	224	val = tr[i].Data.Byte;
	225
	226	#ifdef DEBUG
	227	if (tr[i].cmdTrans == 13)
	228	DPRINTF("write byte: %d\n", val);
	229	#endif
	230
b122ac4b	231	/* Pad writebuf for read-commands in stream */
d0e2002d	232	*writepos = last_data;
e81047b8	233	prev_data = last_data;
b122ac4b	234
8121bc50	235	if (port == ppbase + PP_DATA) {
	236	DPRINTF("data port\n");
	237
	238	data = 0x00;
	239	switch(tr[i].cmdTrans) {
	240	case PP_READ:
	241	ret = 0; /* We don't support reading of the data port */
	242	break;
	243
	244	case PP_WRITE:
	245	if (val & PP_TDI) {
	246	data \|= JTAGKEY_TDI;
	247	DPRINTF("TDI\n");
	248	} else {
	249	DPRINTF("!TDI\n");
	250	}
	251	if (val & PP_TCK) {
	252	data \|= JTAGKEY_TCK;
	253	DPRINTF("TCK\n");
	254	} else {
	255	DPRINTF("!TCK\n");
	256	}
	257	if (val & PP_TMS) {
	258	data \|= JTAGKEY_TMS;
	259	DPRINTF("TMS\n");
	260	} else {
	261	DPRINTF("!TMS\n");
	262	}
	263	if (val & PP_CTRL) {
d0e2002d	264	data = JTAGKEY_OEn;
8121bc50	265	DPRINTF("CTRL\n");
	266	} else {
	267	DPRINTF("!CTRL\n");
	268	}
8121bc50	269
d0e2002d	270	if (val & PP_PROG) {
	271	DPRINTF("PROG\n");
	272	} else {
	273	DPRINTF("!PROG\n");
	274	}
	275
	276	*writepos = data;
	277
b122ac4b	278	last_data = data;
d0e2002d	279	last_write = val;
8121bc50	280	break;
	281
	282	default:
	283	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	284	ret = -1;
	285	break;
	286	}
b122ac4b	287	}
e81047b8	288
617583d0	289	if ((tr[i].cmdTrans == PP_READ) \|\| (*writepos != prev_data) \|\| (i == num-1))
e81047b8	290	writepos++;
b122ac4b	291	}
b122ac4b	292
d0e2002d	293	if (nread)
	294	{
	295	DPRINTF("writing %d bytes\n", writepos-writebuf);
59b06a85	296
	297	*writepos = last_data;
	298	writepos++;
	299
3cc5a0bc	300	#ifndef SLOW_AND_SAFE
9640dec9	301	jtagkey_set_bbmode(BITMODE_SYNCBB);
3cc5a0bc	302	#endif
	303	targ.num = writepos-writebuf;
	304	targ.buf = readbuf;
	305	pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
9640dec9	306	ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
3cc5a0bc	307	pthread_join(reader_thread, NULL);
b122ac4b	308
b122ac4b	309	#ifdef DEBUG
d0e2002d	310	DPRINTF("write: ");
	311	hexdump(writebuf, writepos-writebuf);
	312	DPRINTF("read: ");
	313	hexdump(readbuf, i);
b122ac4b	314	#endif
b122ac4b	315
d0e2002d	316	writepos = writebuf;
	317	} else {
	318	return ret;
	319	}
	320
	321	readpos = readbuf;
617583d0	322	last_write = last_cyc_write;
b122ac4b	323
	324	for (i = 0; i < num; i++) {
	325	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	326	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	327	tr[i].fAutoinc, tr[i].dwOptions);
	328
	329	port = (unsigned long)tr[i].dwPort;
	330	val = tr[i].Data.Byte;
617583d0	331
	332	if ((tr[i].cmdTrans != PP_READ) && (val == last_write) && (i != num-1))
	333	continue;
	334
d0e2002d	335	readpos++;
b122ac4b	336
d0e2002d	337	if (port == ppbase + PP_DATA) {
	338	if (tr[i].cmdTrans == PP_WRITE) {
	339	last_write = val;
	340	}
	341	} else if (port == ppbase + PP_STATUS) {
	342	DPRINTF("status port (last write: 0x%x)\n", last_write);
8121bc50	343	switch(tr[i].cmdTrans) {
8121bc50	344	case PP_READ:
d0e2002d	345	data = *readpos;
59b06a85	346
8121bc50	347	#ifdef DEBUG
	348	DPRINTF("READ: 0x%x\n", data);
	349	jtagkey_state(data);
	350	#endif
	351
	352	val = 0x00;
d0e2002d	353	if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
8121bc50	354	val \|= PP_TDO;
8121bc50	355
617583d0	356	if (~last_write & PP_PROG)
d0e2002d	357	val \|= 0x08;
d0e2002d	358
8121bc50	359	if (last_write & 0x40)
	360	val \|= 0x20;
	361	else
	362	val \|= 0x80;
	363	break;
	364
	365	case PP_WRITE:
	366	ret = 0; /* Status Port is readonly */
	367	break;
	368
	369	default:
	370	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	371	ret = -1;
	372	break;
	373	}
8121bc50	374	} else {
8121bc50	375	ret = 0;
	376	}
	377
	378	tr[i].Data.Byte = val;
	379
	380	DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	381	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	382	tr[i].fAutoinc, tr[i].dwOptions);
	383	#ifdef DEBUG
	384	if (tr[i].cmdTrans == 10)
	385	DPRINTF("read byte: %d\n", tr[i].Data.Byte);
	386	#endif
	387	}
	388
	389	return ret;
	390	}