[usb-driver] / jtagkey.c

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

#define USBBUFSIZE 4096

static struct ftdi_context ftdic;
static unsigned int usb_maxlen = 0;
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_get_chunksize(&ftdic, &usb_maxlen))  != 0) {
		fprintf(stderr, "unable to get write 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_BITBANG))  != 0) {
		fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
		return ret;
	}

	bitbang_mode = BITMODE_BITBANG;

	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);
	}
}

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;
}

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");
}

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;

	/* 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);

		jtagkey_set_bbmode(BITMODE_BITBANG);
		while (pos < writepos) {
			len = writepos-pos;

			if (len > usb_maxlen)
				len = usb_maxlen;

			DPRINTF("combined write of %d/%d\n",len,writepos-pos);
			ftdi_write_data(&ftdic, pos, len);
			pos += len;
		}

		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))
			writepos++;
	}

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

		*writepos = last_data;
		writepos++;

		jtagkey_set_bbmode(BITMODE_SYNCBB);
		ftdi_write_data(&ftdic, writebuf, writepos-writebuf);

		i = 0;
		while (i < writepos-writebuf) {
			i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
		}

#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>
8121bc50	4	#include "usb-driver.h"
5e3d963b	5	#include "config.h"
8121bc50	6	#include "jtagkey.h"
8121bc50	7
4af4753d	8	#define USBBUFSIZE 4096
d0e2002d	9
8121bc50	10	static struct ftdi_context ftdic;
4af4753d	11	static unsigned int usb_maxlen = 0;
9640dec9	12	static unsigned char bitbang_mode;
8121bc50	13
5e3d963b	14	static int jtagkey_init(unsigned short vid, unsigned short pid) {
8121bc50	15	int ret = 0;
d0e2002d	16	unsigned char c;
8121bc50	17
	18	if ((ret = ftdi_init(&ftdic)) != 0) {
	19	fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	20	return ret;
	21	}
	22
	23	if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
	24	fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	25	return ret;
	26	}
	27
	28	if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
	29	fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	30	return ret;
	31	}
	32
	33	if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
	34	fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	35	return ret;
	36	}
	37
4af4753d	38
	39	if ((ret = ftdi_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) {
	40	fprintf(stderr, "unable to get write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
8121bc50	41	return ret;
	42	}
	43
	44	if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) {
	45	fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	46	return ret;
	47	}
	48
d0e2002d	49	if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) {
8121bc50	50	fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	51	return ret;
	52	}
	53
d0e2002d	54	c = 0x00;
	55	ftdi_write_data(&ftdic, &c, 1);
	56
4af4753d	57	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, BITMODE_BITBANG)) != 0) {
8121bc50	58	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	59	return ret;
	60	}
	61
9640dec9	62	bitbang_mode = BITMODE_BITBANG;
9640dec9	63
8121bc50	64	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	65	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	66	return ret;
	67	}
	68
	69	return ret;
	70	}
	71
5e3d963b	72	int jtagkey_open(int num) {
	73	int ret;
	74
	75	ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));
	76
	77	if (ret >= 0)
	78	ret = 0xff;
	79
	80	return ret;
	81	}
	82
	83	void jtagkey_close(int handle) {
	84	if (handle == 0xff) {
	85	ftdi_disable_bitbang(&ftdic);
	86	ftdi_usb_close(&ftdic);
	87	ftdi_deinit(&ftdic);
	88	}
8121bc50	89	}
8121bc50	90
9640dec9	91	static int jtagkey_set_bbmode(unsigned char mode) {
	92	int ret = 0;
	93
	94	if (bitbang_mode != mode) {
	95	DPRINTF("switching bitbang-mode!\n");
59b06a85	96
9640dec9	97	/* Wait for the latency-timer to kick in */
	98	usleep(2);
	99	if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK\|JTAGKEY_TDI\|JTAGKEY_TMS\|JTAGKEY_OEn, mode)) != 0) {
	100	fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	101	return ret;
	102	}
	103	if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
	104	fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
	105	return ret;
	106	}
	107	/* Wait for the FTDI2232 to settle */
	108	usleep(2);
	109
	110	bitbang_mode = mode;
	111	}
	112
	113	return ret;
	114	}
	115
8121bc50	116	void jtagkey_state(unsigned char data) {
	117	fprintf(stderr,"Pins high: ");
	118
	119	if (data & JTAGKEY_TCK)
	120	fprintf(stderr,"TCK ");
	121
	122	if (data & JTAGKEY_TDI)
	123	fprintf(stderr,"TDI ");
	124
	125	if (data & JTAGKEY_TDO)
	126	fprintf(stderr,"TDO ");
	127
	128	if (data & JTAGKEY_TMS)
	129	fprintf(stderr,"TMS ");
	130
	131	if (data & JTAGKEY_VREF)
	132	fprintf(stderr,"VREF ");
	133
	134	fprintf(stderr,"\n");
	135	}
	136
	137	int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
	138	int ret = 0;
	139	int i;
d0e2002d	140	int nread = 0;
8121bc50	141	unsigned long port;
8121bc50	142	unsigned char val;
d0e2002d	143	static unsigned char last_data = 0;
e81047b8	144	static unsigned char last_write = 0x00;
d0e2002d	145	static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
d0e2002d	146	static unsigned char readbuf[USBBUFSIZE], *readpos;
e81047b8	147	unsigned char data, prev_data;
d0e2002d	148
e81047b8	149	/* Count reads */
d0e2002d	150	for (i = 0; i < num; i++)
e81047b8	151	if (tr[i].cmdTrans == PP_READ)
d0e2002d	152	nread++;
	153
	154	/* Write combining */
	155	if ((writepos-writebuf > sizeof(writebuf)-num) \|\| (nread && writepos-writebuf)) {
4af4753d	156	unsigned char *pos = writebuf;
4af4753d	157	int len;
d0e2002d	158	DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
d0e2002d	159
9640dec9	160	jtagkey_set_bbmode(BITMODE_BITBANG);
4af4753d	161	while (pos < writepos) {
85690a3f	162	len = writepos-pos;
85690a3f	163
4af4753d	164	if (len > usb_maxlen)
4af4753d	165	len = usb_maxlen;
d0e2002d	166
4af4753d	167	DPRINTF("combined write of %d/%d\n",len,writepos-pos);
	168	ftdi_write_data(&ftdic, pos, len);
	169	pos += len;
e81047b8	170	}
4af4753d	171
d0e2002d	172	writepos = writebuf;
d0e2002d	173	}
8121bc50	174
	175	for (i = 0; i < num; i++) {
	176	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	177	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	178	tr[i].fAutoinc, tr[i].dwOptions);
	179
	180	port = (unsigned long)tr[i].dwPort;
	181	val = tr[i].Data.Byte;
	182
	183	#ifdef DEBUG
	184	if (tr[i].cmdTrans == 13)
	185	DPRINTF("write byte: %d\n", val);
	186	#endif
	187
b122ac4b	188	/* Pad writebuf for read-commands in stream */
d0e2002d	189	*writepos = last_data;
e81047b8	190	prev_data = last_data;
b122ac4b	191
8121bc50	192	if (port == ppbase + PP_DATA) {
	193	DPRINTF("data port\n");
	194
	195	data = 0x00;
	196	switch(tr[i].cmdTrans) {
	197	case PP_READ:
	198	ret = 0; /* We don't support reading of the data port */
	199	break;
	200
	201	case PP_WRITE:
	202	if (val & PP_TDI) {
	203	data \|= JTAGKEY_TDI;
	204	DPRINTF("TDI\n");
	205	} else {
	206	DPRINTF("!TDI\n");
	207	}
	208	if (val & PP_TCK) {
	209	data \|= JTAGKEY_TCK;
	210	DPRINTF("TCK\n");
	211	} else {
	212	DPRINTF("!TCK\n");
	213	}
	214	if (val & PP_TMS) {
	215	data \|= JTAGKEY_TMS;
	216	DPRINTF("TMS\n");
	217	} else {
	218	DPRINTF("!TMS\n");
	219	}
	220	if (val & PP_CTRL) {
d0e2002d	221	data = JTAGKEY_OEn;
8121bc50	222	DPRINTF("CTRL\n");
	223	} else {
	224	DPRINTF("!CTRL\n");
	225	}
8121bc50	226
d0e2002d	227	if (val & PP_PROG) {
	228	DPRINTF("PROG\n");
	229	} else {
	230	DPRINTF("!PROG\n");
	231	}
	232
	233	*writepos = data;
	234
b122ac4b	235	last_data = data;
d0e2002d	236	last_write = val;
8121bc50	237	break;
	238
	239	default:
	240	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	241	ret = -1;
	242	break;
	243	}
b122ac4b	244	}
e81047b8	245
	246	if (nread \|\| (*writepos != prev_data))
	247	writepos++;
b122ac4b	248	}
b122ac4b	249
d0e2002d	250	if (nread)
	251	{
	252	DPRINTF("writing %d bytes\n", writepos-writebuf);
59b06a85	253
	254	*writepos = last_data;
	255	writepos++;
	256
9640dec9	257	jtagkey_set_bbmode(BITMODE_SYNCBB);
9640dec9	258	ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
3f5287b7	259
9640dec9	260	i = 0;
	261	while (i < writepos-writebuf) {
	262	i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
d0e2002d	263	}
b122ac4b	264
b122ac4b	265	#ifdef DEBUG
d0e2002d	266	DPRINTF("write: ");
	267	hexdump(writebuf, writepos-writebuf);
	268	DPRINTF("read: ");
	269	hexdump(readbuf, i);
b122ac4b	270	#endif
b122ac4b	271
d0e2002d	272	writepos = writebuf;
	273	} else {
	274	return ret;
	275	}
	276
	277	readpos = readbuf;
b122ac4b	278
	279	for (i = 0; i < num; i++) {
	280	DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	281	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	282	tr[i].fAutoinc, tr[i].dwOptions);
	283
	284	port = (unsigned long)tr[i].dwPort;
	285	val = tr[i].Data.Byte;
d0e2002d	286	readpos++;
b122ac4b	287
d0e2002d	288	if (port == ppbase + PP_DATA) {
	289	if (tr[i].cmdTrans == PP_WRITE) {
	290	last_write = val;
	291	}
	292	} else if (port == ppbase + PP_STATUS) {
	293	DPRINTF("status port (last write: 0x%x)\n", last_write);
8121bc50	294	switch(tr[i].cmdTrans) {
8121bc50	295	case PP_READ:
d0e2002d	296	data = *readpos;
59b06a85	297
8121bc50	298	#ifdef DEBUG
	299	DPRINTF("READ: 0x%x\n", data);
	300	jtagkey_state(data);
	301	#endif
	302
	303	val = 0x00;
d0e2002d	304	if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
8121bc50	305	val \|= PP_TDO;
8121bc50	306
d0e2002d	307	if (!(last_write & PP_PROG))
	308	val \|= 0x08;
	309
8121bc50	310	if (last_write & 0x40)
	311	val \|= 0x20;
	312	else
	313	val \|= 0x80;
	314	break;
	315
	316	case PP_WRITE:
	317	ret = 0; /* Status Port is readonly */
	318	break;
	319
	320	default:
	321	fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
	322	ret = -1;
	323	break;
	324	}
8121bc50	325	} else {
8121bc50	326	ret = 0;
	327	}
	328
	329	tr[i].Data.Byte = val;
	330
	331	DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
	332	(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
	333	tr[i].fAutoinc, tr[i].dwOptions);
	334	#ifdef DEBUG
	335	if (tr[i].cmdTrans == 10)
	336	DPRINTF("read byte: %d\n", tr[i].Data.Byte);
	337	#endif
	338	}
	339
	340	return ret;
	341	}