#include <stdio.h>
#include <ftdi.h>
+#include <unistd.h>
+#include <pthread.h>
#include "usb-driver.h"
+#include "config.h"
#include "jtagkey.h"
-#define USBBUFSIZE 4096
+#define USBBUFSIZE 1048576
+#define SLOW_AND_SAFE 1
static struct ftdi_context ftdic;
-static unsigned int usb_maxlen = 0;
+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 ((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_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) {
- fprintf(stderr, "unable to get write chunksize: %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;
}
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) {
+ 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;
}
-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);
+}
+
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 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 ((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 > usb_maxlen)
- len = usb_maxlen;
+ 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
- DPRINTF("read %d/%d bytes\n", i, writepos-writebuf);
writepos = writebuf;
}
}
}
- if (nread || (*writepos != prev_data))
+ if (nread || (*writepos != prev_data) || (i == num-1))
writepos++;
}
if (nread)
{
DPRINTF("writing %d bytes\n", writepos-writebuf);
- for (i=0; i<writepos-writebuf; i++) {
- ftdi_write_data(&ftdic, writebuf+i, 1);
- ftdi_read_pins(&ftdic, readbuf+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: ");
switch(tr[i].cmdTrans) {
case PP_READ:
data = *readpos;
+
#ifdef DEBUG
DPRINTF("READ: 0x%x\n", data);
jtagkey_state(data);
projects / usb-driver / blobdiff