#include <ftdi.h>
#include <unistd.h>
#include <pthread.h>
+#include <inttypes.h>
#include "usb-driver.h"
#include "config.h"
#include "jtagkey.h"
+#include "jtagmon.h"
#define USBBUFSIZE 1048576
-#define SLOW_AND_SAFE 1
+#define JTAG_SPEED 100000
+#define BULK_LATENCY 2
+#define OTHER_LATENCY 1
static struct ftdi_context ftdic;
-static unsigned char bitbang_mode;
+
+static int jtagkey_latency(int latency) {
+ static int current = 0;
+ int ret;
+
+ if (current != latency) {
+ DPRINTF("switching latency\n");
+ if ((ret = ftdi_set_latency_timer(&ftdic, latency)) != 0) {
+ fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ current = latency;
+ }
+
+ return ret;
+}
static int jtagkey_init(unsigned short vid, unsigned short pid) {
int ret = 0;
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));
+ if ((ret = jtagkey_latency(OTHER_LATENCY)) != 0)
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);
return ret;
}
- bitbang_mode = BITMODE_SYNCBB;
+ 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;
+ }
if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&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) {
+#ifdef DEBUG
+static void jtagkey_state(unsigned char data) {
fprintf(stderr,"Pins high: ");
if (data & JTAGKEY_TCK)
fprintf(stderr,"\n");
}
+#endif
struct jtagkey_reader_arg {
int num;
static void *jtagkey_reader(void *thread_arg) {
struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg;
-
int i;
i = 0;
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;
static unsigned char last_write = 0x00;
static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
static unsigned char readbuf[USBBUFSIZE], *readpos;
- unsigned char data, prev_data;
+ unsigned char data, prev_data, last_cyc_write;
struct jtagkey_reader_arg targ;
pthread_t reader_thread;
int len;
DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
+ jtagkey_latency(BULK_LATENCY);
-#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;
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,
#ifdef DEBUG
if (tr[i].cmdTrans == 13)
DPRINTF("write byte: %d\n", val);
+
+ if (tr[i].cmdTrans == 13)
+ jtagmon(val & PP_TCK, val & PP_TMS, val & PP_TDI);
#endif
/* Pad writebuf for read-commands in stream */
}
}
- if (nread || (*writepos != prev_data) || (i == num-1))
+ if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1))
writepos++;
}
*writepos = last_data;
writepos++;
-#ifndef SLOW_AND_SAFE
- jtagkey_set_bbmode(BITMODE_SYNCBB);
-#endif
+ jtagkey_latency(OTHER_LATENCY);
+
targ.num = writepos-writebuf;
targ.buf = readbuf;
pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
}
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",
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 ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
val |= PP_TDO;
- if (!(last_write & PP_PROG))
+ if (~last_write & PP_PROG)
val |= 0x08;
if (last_write & 0x40)
projects / usb-driver / blobdiff