[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 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;
	}

	if ((ret = ftdi_set_baudrate(&ftdic, 500000))  != 0) {
		fprintf(stderr, "unable to set baudrate: %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;
	}

	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);
}

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;
	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;
	}

	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 (nread || (*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;

	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;
		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
75417531	10	#define SLOW_AND_SAFE 1
d0e2002d	11
8121bc50	12	static struct ftdi_context ftdic;
9640dec9	13	static unsigned char bitbang_mode;
8121bc50	14
5e3d963b	15	static int jtagkey_init(unsigned short vid, unsigned short pid) {
8121bc50	16	int ret = 0;
d0e2002d	17	unsigned char c;
8121bc50	18
	19	if ((ret = ftdi_init(&ftdic)) != 0) {
	20	fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	21	return ret;
	22	}
	23
	24	if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
	25	fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	26	return ret;
	27	}
	28
	29	if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
	30	fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	31	return ret;
	32	}
	33
	34	if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
	35	fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	36	return ret;
	37	}
	38
3cc5a0bc	39	if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
	40	fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	41	return ret;
	42	}
4af4753d	43
3cc5a0bc	44	if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
3cc5a0bc	45	fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
8121bc50	46	return ret;
	47	}
	48
	49	if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) {
	50	fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	51	return ret;
	52	}
	53
d0e2002d	54	if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) {
8121bc50	55	fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	56	return ret;
	57	}
	58
d0e2002d	59	c = 0x00;
	60	ftdi_write_data(&ftdic, &c, 1);
	61
75417531	62	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) {
8121bc50	63	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	64	return ret;
	65	}
	66
75417531	67	bitbang_mode = BITMODE_SYNCBB;
9640dec9	68
8121bc50	69	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	70	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	71	return ret;
	72	}
	73
	74	return ret;
	75	}
	76
5e3d963b	77	int jtagkey_open(int num) {
	78	int ret;
	79
	80	ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));
	81
	82	if (ret >= 0)
	83	ret = 0xff;
	84
	85	return ret;
	86	}
	87
	88	void jtagkey_close(int handle) {
	89	if (handle == 0xff) {
	90	ftdi_disable_bitbang(&ftdic);
	91	ftdi_usb_close(&ftdic);
	92	ftdi_deinit(&ftdic);
	93	}
8121bc50	94	}
8121bc50	95
3cc5a0bc	96	#ifndef SLOW_AND_SAFE
9640dec9	97	static int jtagkey_set_bbmode(unsigned char mode) {
	98	int ret = 0;
	99
	100	if (bitbang_mode != mode) {
	101	DPRINTF("switching bitbang-mode!\n");
59b06a85	102
9640dec9	103	/* Wait for the latency-timer to kick in */
	104	usleep(2);
	105	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, mode)) != 0) {
	106	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	107	return ret;
	108	}
	109	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	110	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	111	return ret;
	112	}
	113	/* Wait for the FTDI2232 to settle */
	114	usleep(2);
	115
	116	bitbang_mode = mode;
	117	}
	118
	119	return ret;
	120	}
3cc5a0bc	121	#endif
9640dec9	122
8121bc50	123	void jtagkey_state(unsigned char data) {
	124	fprintf(stderr,"Pins high: ");
	125
	126	if (data & JTAGKEY_TCK)
	127	fprintf(stderr,"TCK ");
	128
	129	if (data & JTAGKEY_TDI)
	130	fprintf(stderr,"TDI ");
	131
	132	if (data & JTAGKEY_TDO)
	133	fprintf(stderr,"TDO ");
	134
	135	if (data & JTAGKEY_TMS)
	136	fprintf(stderr,"TMS ");
	137
	138	if (data & JTAGKEY_VREF)
	139	fprintf(stderr,"VREF ");
	140
	141	fprintf(stderr,"\n");
	142	}
	143
3cc5a0bc	144	struct jtagkey_reader_arg {
	145	int num;
	146	unsigned char *buf;
	147	};
	148
	149	static void jtagkey_reader(void thread_arg) {
	150	struct jtagkey_reader_arg arg = (struct jtagkey_reader_arg)thread_arg;
	151
	152	int i;
	153
	154	i = 0;
	155	DPRINTF("reader for %d bytes\n", arg->num);
	156	while (i < arg->num) {
	157	i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i);
	158	}
	159
	160	pthread_exit(NULL);
	161	}
	162
8121bc50	163	int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
	164	int ret = 0;
	165	int i;
d0e2002d	166	int nread = 0;
8121bc50	167	unsigned long port;
8121bc50	168	unsigned char val;
d0e2002d	169	static unsigned char last_data = 0;
e81047b8	170	static unsigned char last_write = 0x00;
d0e2002d	171	static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
d0e2002d	172	static unsigned char readbuf[USBBUFSIZE], *readpos;
e81047b8	173	unsigned char data, prev_data;
3cc5a0bc	174	struct jtagkey_reader_arg targ;
3cc5a0bc	175	pthread_t reader_thread;
d0e2002d	176
e81047b8	177	/* Count reads */
d0e2002d	178	for (i = 0; i < num; i++)
e81047b8	179	if (tr[i].cmdTrans == PP_READ)
d0e2002d	180	nread++;
	181
	182	/* Write combining */
	183	if ((writepos-writebuf > sizeof(writebuf)-num) \|\| (nread && writepos-writebuf)) {
4af4753d	184	unsigned char *pos = writebuf;
4af4753d	185	int len;
3cc5a0bc	186
d0e2002d	187	DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
d0e2002d	188
75417531	189	#ifndef SLOW_AND_SAFE
9640dec9	190	jtagkey_set_bbmode(BITMODE_BITBANG);
3cc5a0bc	191	#endif
	192	#ifdef SLOW_AND_SAFE
	193	targ.num = writepos-pos;
	194	targ.buf = readbuf;
	195	pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
75417531	196	#endif
4af4753d	197	while (pos < writepos) {
85690a3f	198	len = writepos-pos;
85690a3f	199
3cc5a0bc	200	if (len > USBBUFSIZE)
3cc5a0bc	201	len = USBBUFSIZE;
d0e2002d	202
4af4753d	203	DPRINTF("combined write of %d/%d\n",len,writepos-pos);
	204	ftdi_write_data(&ftdic, pos, len);
	205	pos += len;
e81047b8	206	}
3cc5a0bc	207	#ifdef SLOW_AND_SAFE
	208	pthread_join(reader_thread, NULL);
	209	#endif
4af4753d	210
d0e2002d	211	writepos = writebuf;
d0e2002d	212	}
8121bc50	213
	214	for (i = 0; i < num; i++) {
	215	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	216	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	217	tr[i].fAutoinc, tr[i].dwOptions);
	218
	219	port = (unsigned long)tr[i].dwPort;
	220	val = tr[i].Data.Byte;
	221
	222	#ifdef DEBUG
	223	if (tr[i].cmdTrans == 13)
	224	DPRINTF("write byte: %d\n", val);
	225	#endif
	226
b122ac4b	227	/* Pad writebuf for read-commands in stream */
d0e2002d	228	*writepos = last_data;
e81047b8	229	prev_data = last_data;
b122ac4b	230
8121bc50	231	if (port == ppbase + PP_DATA) {
	232	DPRINTF("data port\n");
	233
	234	data = 0x00;
	235	switch(tr[i].cmdTrans) {
	236	case PP_READ:
	237	ret = 0; /* We don't support reading of the data port */
	238	break;
	239
	240	case PP_WRITE:
	241	if (val & PP_TDI) {
	242	data \|= JTAGKEY_TDI;
	243	DPRINTF("TDI\n");
	244	} else {
	245	DPRINTF("!TDI\n");
	246	}
	247	if (val & PP_TCK) {
	248	data \|= JTAGKEY_TCK;
	249	DPRINTF("TCK\n");
	250	} else {
	251	DPRINTF("!TCK\n");
	252	}
	253	if (val & PP_TMS) {
	254	data \|= JTAGKEY_TMS;
	255	DPRINTF("TMS\n");
	256	} else {
	257	DPRINTF("!TMS\n");
	258	}
	259	if (val & PP_CTRL) {
d0e2002d	260	data = JTAGKEY_OEn;
8121bc50	261	DPRINTF("CTRL\n");
	262	} else {
	263	DPRINTF("!CTRL\n");
	264	}
8121bc50	265
d0e2002d	266	if (val & PP_PROG) {
	267	DPRINTF("PROG\n");
	268	} else {
	269	DPRINTF("!PROG\n");
	270	}
	271
	272	*writepos = data;
	273
b122ac4b	274	last_data = data;
d0e2002d	275	last_write = val;
8121bc50	276	break;
	277
	278	default:
	279	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	280	ret = -1;
	281	break;
	282	}
b122ac4b	283	}
e81047b8	284
3cc5a0bc	285	if (nread \|\| (*writepos != prev_data) \|\| (i == num-1))
e81047b8	286	writepos++;
b122ac4b	287	}
b122ac4b	288
d0e2002d	289	if (nread)
	290	{
	291	DPRINTF("writing %d bytes\n", writepos-writebuf);
59b06a85	292
	293	*writepos = last_data;
	294	writepos++;
	295
3cc5a0bc	296	#ifndef SLOW_AND_SAFE
9640dec9	297	jtagkey_set_bbmode(BITMODE_SYNCBB);
3cc5a0bc	298	#endif
	299	targ.num = writepos-writebuf;
	300	targ.buf = readbuf;
	301	pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
9640dec9	302	ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
3cc5a0bc	303	pthread_join(reader_thread, NULL);
b122ac4b	304
b122ac4b	305	#ifdef DEBUG
d0e2002d	306	DPRINTF("write: ");
	307	hexdump(writebuf, writepos-writebuf);
	308	DPRINTF("read: ");
	309	hexdump(readbuf, i);
b122ac4b	310	#endif
b122ac4b	311
d0e2002d	312	writepos = writebuf;
	313	} else {
	314	return ret;
	315	}
	316
	317	readpos = readbuf;
b122ac4b	318
	319	for (i = 0; i < num; i++) {
	320	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	321	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	322	tr[i].fAutoinc, tr[i].dwOptions);
	323
	324	port = (unsigned long)tr[i].dwPort;
	325	val = tr[i].Data.Byte;
d0e2002d	326	readpos++;
b122ac4b	327
d0e2002d	328	if (port == ppbase + PP_DATA) {
	329	if (tr[i].cmdTrans == PP_WRITE) {
	330	last_write = val;
	331	}
	332	} else if (port == ppbase + PP_STATUS) {
	333	DPRINTF("status port (last write: 0x%x)\n", last_write);
8121bc50	334	switch(tr[i].cmdTrans) {
8121bc50	335	case PP_READ:
d0e2002d	336	data = *readpos;
59b06a85	337
8121bc50	338	#ifdef DEBUG
	339	DPRINTF("READ: 0x%x\n", data);
	340	jtagkey_state(data);
	341	#endif
	342
	343	val = 0x00;
d0e2002d	344	if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
8121bc50	345	val \|= PP_TDO;
8121bc50	346
d0e2002d	347	if (!(last_write & PP_PROG))
	348	val \|= 0x08;
	349
8121bc50	350	if (last_write & 0x40)
	351	val \|= 0x20;
	352	else
	353	val \|= 0x80;
	354	break;
	355
	356	case PP_WRITE:
	357	ret = 0; /* Status Port is readonly */
	358	break;
	359
	360	default:
	361	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	362	ret = -1;
	363	break;
	364	}
8121bc50	365	} else {
8121bc50	366	ret = 0;
	367	}
	368
	369	tr[i].Data.Byte = val;
	370
	371	DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	372	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	373	tr[i].fAutoinc, tr[i].dwOptions);
	374	#ifdef DEBUG
	375	if (tr[i].cmdTrans == 10)
	376	DPRINTF("read byte: %d\n", tr[i].Data.Byte);
	377	#endif
	378	}
	379
	380	return ret;
	381	}