improve performance by

 * using synchronous bitbang mode
 * handling multi transfers in the jtagkey-driver by combining writes and reads

diff --git a/jtagkey.c b/jtagkey.c
index 0078e474e064234ee3561f5a8b6ca6c5a17aa2a4..f8e715826893e4b378142e592341dc4d5d3ce1eb 100644 (file)
--- a/jtagkey.c
+++ b/jtagkey.c
@@ -28,22 +28,24 @@ int jtagkey_init(unsigned short vid, unsigned short pid) {
                return ret;
        }
 
-       if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1))  != 0) {
+#if 0
+       if ((ret = ftdi_write_data_set_chunksize(&ftdic, 3))  != 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));
                return ret;
        }
 
-       if ((ret = ftdi_set_baudrate(&ftdic, 230400))  != 0) {
+       if ((ret = ftdi_set_baudrate(&ftdic, 1000000))  != 0) {
                fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
                return ret;
        }
 
-       if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, 1))  != 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;
        }
@@ -88,9 +90,11 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
        int i;
        unsigned long port;
        unsigned char val;
-       static unsigned char last_write = 0;
+       static unsigned char last_write = 0, last_data = 0;
        unsigned char data;
+       unsigned char writebuf[4096], readbuf[4096], *pos;
 
+       pos = 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,
@@ -104,6 +108,12 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
                        DPRINTF("write byte: %d\n", val);
 #endif
 
+               /* Pad writebuf for read-commands in stream */
+               if (tr[i].cmdTrans == 10) {
+                       *pos = last_data;
+                       pos++;
+               }
+
                if (port == ppbase + PP_DATA) {
                        DPRINTF("data port\n");
 
@@ -138,15 +148,11 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
                                        } else {
                                                DPRINTF("!CTRL\n");
                                        }
-                                       ftdi_write_data(&ftdic, &data, 1);
-
-#if 0
-                                       do {
-                                               ftdi_read_pins(&ftdic, &tmp);
-                                       } while ((tmp & (JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_TCK|JTAGKEY_TDI)) != data);
-#endif
+                                       *pos = data;
+                                       pos++;
 
                                        last_write = val;
+                                       last_data = data;
                                        break;
 
                                default:
@@ -154,11 +160,43 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
                                        ret = -1;
                                        break;
                        }
-               } else if (port == ppbase + PP_STATUS) {
+               }
+       }
+
+       ftdi_usb_purge_buffers(&ftdic);
+       ftdi_write_data(&ftdic, writebuf, pos-writebuf);
+
+       i = 0;
+       do {
+#if 0
+               ftdi_write_data(&ftdic, &last_data, 1);
+#endif
+               i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
+       } while (i < pos-writebuf);
+
+#ifdef DEBUG
+       DPRINTF("write: ");
+       hexdump(writebuf, pos-writebuf);
+       DPRINTF("read: ");
+       hexdump(readbuf, i);
+#endif
+
+       pos = 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;
+               pos++;
+
+               if (port == ppbase + PP_STATUS) {
                        DPRINTF("status port (last write: %d)\n", last_write);
                        switch(tr[i].cmdTrans) {
                                case PP_READ:
-                                       ftdi_read_pins(&ftdic, &data);
+                                       data = *pos;
 #ifdef DEBUG
                                        DPRINTF("READ: 0x%x\n", data);
                                        jtagkey_state(data);
@@ -183,16 +221,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
                                        ret = -1;
                                        break;
                        }
-               } else if (port == ppbase + PP_CONTROL) {
-                       DPRINTF("control port\n");
-               } else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) {
-                       DPRINTF("ECP_CFGA port\n");
-               } else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) {
-                       DPRINTF("ECP_CFGB port\n");
-               } else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) {
-                       DPRINTF("ECP_ECR port\n");
                } else {
-                       DPRINTF("access to unsupported address range!\n");
                        ret = 0;
                }
 

diff --git a/usb-driver.c b/usb-driver.c
index b3dd4d8cc12066e829f0a8ac775c4595907ba17a..6b1fb87b36ce8979d3bd2085f2da0a4badb93911 100644 (file)
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -65,7 +65,6 @@ static pthread_mutex_t int_wait = PTHREAD_MUTEX_INITIALIZER;
 
 #define NO_WINDRVR 1
 
-#ifdef DEBUG
 void hexdump(unsigned char *buf, int len) {
        int i;
 
@@ -76,7 +75,6 @@ void hexdump(unsigned char *buf, int len) {
        }
        fprintf(stderr,"\n");
 }
-#endif
 
 int usb_deviceinfo(unsigned char *buf) {
        int i,j,k,l;
@@ -351,7 +349,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
        switch(request & ~(0xc0000000)) {
                case VERSION:
                        version = (struct version_struct*)(wdheader->data);
-                       strcpy(version->version, "libusb-driver.so $Revision: 1.63 $");
+                       strcpy(version->version, "libusb-driver.so $Revision: 1.64 $");
                        version->versionul = 802;
                        DPRINTF("VERSION\n");
                        break;

diff --git a/usb-driver.h b/usb-driver.h
index dd93deb3847e732b1a4484521e7b46fe875a0099..282a5f8c03298cf12322444719cc4a202a84d2e1 100644 (file)
--- a/usb-driver.h
+++ b/usb-driver.h
@@ -43,6 +43,8 @@
 #define DPRINTF(format, args...)
 #endif
 
+void hexdump(unsigned char *buf, int len);
+
 #define WDU_GET_MAX_PACKET_SIZE(x)                ((unsigned short) (((x) & 0x7ff) * (1 + (((x) & 0x1800) >> 11))))
 
 /* http://www.jungo.com/support/documentation/windriver/811/wdusb_man_mhtml/node78.html#SECTION001734000000000000000 */