#include <stdio.h>
#include <ftdi.h>
+#include <unistd.h>
+#include <pthread.h>
#include "usb-driver.h"
+#include "config.h"
#include "jtagkey.h"
-#define USBBUFSIZE 384
+#define USBBUFSIZE 1048576
+#define JTAG_SPEED 100000
+#define SLOW_AND_SAFE 1
static struct ftdi_context ftdic;
+static unsigned char bitbang_mode;
-int jtagkey_init(unsigned short vid, unsigned short pid) {
+static int jtagkey_init(unsigned short vid, unsigned short pid) {
int ret = 0;
unsigned char c;
return ret;
}
-#if 0
- if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 0) {
+ 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;
}
-#endif
- 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 = 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_baudrate(&ftdic, 500000)) != 0) {
- fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ 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;
}
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;
}
-void jtagkey_close() {
- ftdi_disable_bitbang(&ftdic);
- ftdi_usb_close(&ftdic);
- ftdi_deinit(&ftdic);
+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: ");
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;
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;
/* Count reads */
for (i = 0; i < num; i++)
/* 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);
- ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
+#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;
- i = 0;
- while (i < writepos-writebuf) {
- i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
+ if (len > USBBUFSIZE)
+ len = USBBUFSIZE;
+
+ DPRINTF("combined write of %d/%d\n",len,writepos-pos);
+ ftdi_write_data(&ftdic, pos, len);
+ pos += len;
}
- DPRINTF("read %d/%d bytes\n", i, writepos-writebuf);
+#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,
}
}
- if (nread || (*writepos != prev_data))
+ if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1))
writepos++;
}
if (nread)
{
DPRINTF("writing %d bytes\n", writepos-writebuf);
- ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
- DPRINTF("reading %d bytes\n", writepos-writebuf);
- i = 0;
- while (i < writepos-writebuf) {
- i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
- }
- DPRINTF("read %d bytes\n", i);
+ *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: ");
}
readpos = readbuf;
- readpos += 0;
+ 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) {
switch(tr[i].cmdTrans) {
case PP_READ:
data = *readpos;
+
#ifdef DEBUG
DPRINTF("READ: 0x%x\n", data);
jtagkey_state(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