git.zerfleddert.de Git - usb-driver/blob - jtagkey.c

   1 #include <stdio.h>
   2 #include <ftdi.h>
   3 #include "usb-driver.h"
   4 #include "jtagkey.h"
   5
   6 #define USBBUFSIZE 384
   7
   8 static struct ftdi_context ftdic;
   9
  10 int jtagkey_init(unsigned short vid, unsigned short pid) {
  11         int ret = 0;
  12         unsigned char c;
  13
  14         if ((ret = ftdi_init(&ftdic)) != 0) {
  15                 fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  16                 return ret;
  17         }
  18
  19         if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
  20                 fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  21                 return ret;
  22         }
  23
  24         if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
  25                 fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  26                 return ret;
  27         }
  28
  29         if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
  30                 fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  31                 return ret;
  32         }
  33
  34 #if 0
  35         if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1))  != 0) {
  36                 fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  37                 return ret;
  38         }
  39 #endif
  40
  41         if ((ret = ftdi_set_latency_timer(&ftdic, 1))  != 0) {
  42                 fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  43                 return ret;
  44         }
  45
  46         if ((ret = ftdi_set_baudrate(&ftdic, 500000))  != 0) {
  47                 fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  48                 return ret;
  49         }
  50
  51         c = 0x00;
  52         ftdi_write_data(&ftdic, &c, 1);
  53
  54         if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB))  != 0) {
  55                 fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  56                 return ret;
  57         }
  58
  59         if ((ret = ftdi_usb_purge_buffers(&ftdic))  != 0) {
  60                 fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
  61                 return ret;
  62         }
  63
  64         return ret;
  65 }
  66
  67 void jtagkey_close() {
  68         ftdi_disable_bitbang(&ftdic);
  69         ftdi_usb_close(&ftdic);
  70         ftdi_deinit(&ftdic);
  71 }
  72
  73 void jtagkey_state(unsigned char data) {
  74         fprintf(stderr,"Pins high: ");
  75
  76         if (data & JTAGKEY_TCK)
  77                 fprintf(stderr,"TCK ");
  78
  79         if (data & JTAGKEY_TDI)
  80                 fprintf(stderr,"TDI ");
  81
  82         if (data & JTAGKEY_TDO)
  83                 fprintf(stderr,"TDO ");
  84
  85         if (data & JTAGKEY_TMS)
  86                 fprintf(stderr,"TMS ");
  87
  88         if (data & JTAGKEY_VREF)
  89                 fprintf(stderr,"VREF ");
  90
  91         fprintf(stderr,"\n");
  92 }
  93
  94 int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
  95         int ret = 0;
  96         int i;
  97         int nread = 0;
  98         unsigned long port;
  99         unsigned char val;
 100         static unsigned char last_data = 0;
 101         static unsigned char last_write = 0x00;
 102         static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
 103         static unsigned char readbuf[USBBUFSIZE], *readpos;
 104         unsigned char data, prev_data;
 105
 106         /* Count reads */
 107         for (i = 0; i < num; i++)
 108                 if (tr[i].cmdTrans == PP_READ)
 109                         nread++;
 110
 111         /* Write combining */
 112         if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) {
 113                 DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
 114
 115                 ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
 116
 117                 i = 0;
 118                 while (i < writepos-writebuf) {
 119                         i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
 120                 }
 121                 DPRINTF("read %d/%d bytes\n", i, writepos-writebuf);
 122                 writepos = writebuf;
 123         }
 124
 125         for (i = 0; i < num; i++) {
 126                 DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
 127                                 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
 128                                 tr[i].fAutoinc, tr[i].dwOptions);
 129
 130                 port = (unsigned long)tr[i].dwPort;
 131                 val = tr[i].Data.Byte;
 132
 133 #ifdef DEBUG
 134                 if (tr[i].cmdTrans == 13)
 135                         DPRINTF("write byte: %d\n", val);
 136 #endif
 137
 138                 /* Pad writebuf for read-commands in stream */
 139                 *writepos = last_data;
 140                 prev_data = last_data;
 141
 142                 if (port == ppbase + PP_DATA) {
 143                         DPRINTF("data port\n");
 144
 145                         data = 0x00;
 146                         switch(tr[i].cmdTrans) {
 147                                 case PP_READ:
 148                                         ret = 0; /* We don't support reading of the data port */
 149                                         break;
 150
 151                                 case PP_WRITE:
 152                                         if (val & PP_TDI) {
 153                                                 data |= JTAGKEY_TDI;
 154                                                 DPRINTF("TDI\n");
 155                                         } else {
 156                                                 DPRINTF("!TDI\n");
 157                                         }
 158                                         if (val & PP_TCK) {
 159                                                 data |= JTAGKEY_TCK;
 160                                                 DPRINTF("TCK\n");
 161                                         } else {
 162                                                 DPRINTF("!TCK\n");
 163                                         }
 164                                         if (val & PP_TMS) {
 165                                                 data |= JTAGKEY_TMS;
 166                                                 DPRINTF("TMS\n");
 167                                         } else {
 168                                                 DPRINTF("!TMS\n");
 169                                         }
 170                                         if (val & PP_CTRL) {
 171                                                 data = JTAGKEY_OEn;
 172                                                 DPRINTF("CTRL\n");
 173                                         } else {
 174                                                 DPRINTF("!CTRL\n");
 175                                         }
 176
 177                                         if (val & PP_PROG) {
 178                                                 DPRINTF("PROG\n");
 179                                         } else {
 180                                                 DPRINTF("!PROG\n");
 181                                         }
 182
 183                                         *writepos = data;
 184
 185                                         last_data = data;
 186                                         last_write = val;
 187                                         break;
 188
 189                                 default:
 190                                         fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
 191                                         ret = -1;
 192                                         break;
 193                         }
 194                 }
 195
 196                 if (nread || (*writepos != prev_data))
 197                         writepos++;
 198         }
 199
 200         if (nread)
 201         {
 202                 DPRINTF("writing %d bytes\n", writepos-writebuf);
 203                 ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
 204                 DPRINTF("reading %d bytes\n", writepos-writebuf);
 205
 206                 i = 0;
 207                 while (i < writepos-writebuf) {
 208                         i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
 209                 }
 210                 DPRINTF("read %d bytes\n", i);
 211
 212 #ifdef DEBUG
 213                 DPRINTF("write: ");
 214                 hexdump(writebuf, writepos-writebuf);
 215                 DPRINTF("read: ");
 216                 hexdump(readbuf, i);
 217 #endif
 218
 219                 writepos = writebuf;
 220         } else {
 221                 return ret;
 222         }
 223
 224         readpos = readbuf;
 225         readpos += 0;
 226
 227         for (i = 0; i < num; i++) {
 228                 DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
 229                                 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
 230                                 tr[i].fAutoinc, tr[i].dwOptions);
 231
 232                 port = (unsigned long)tr[i].dwPort;
 233                 val = tr[i].Data.Byte;
 234                 readpos++;
 235
 236                 if (port == ppbase + PP_DATA) {
 237                         if (tr[i].cmdTrans == PP_WRITE) {
 238                                 last_write = val;
 239                         }
 240                 } else if (port == ppbase + PP_STATUS) {
 241                         DPRINTF("status port (last write: 0x%x)\n", last_write);
 242                         switch(tr[i].cmdTrans) {
 243                                 case PP_READ:
 244                                         data = *readpos;
 245 #ifdef DEBUG
 246                                         DPRINTF("READ: 0x%x\n", data);
 247                                         jtagkey_state(data);
 248 #endif
 249
 250                                         val = 0x00;
 251                                         if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
 252                                                 val |= PP_TDO;
 253
 254                                         if (!(last_write & PP_PROG))
 255                                                 val |= 0x08;
 256
 257                                         if (last_write & 0x40)
 258                                                 val |= 0x20;
 259                                         else
 260                                                 val |= 0x80;
 261                                         break;
 262
 263                                 case PP_WRITE:
 264                                         ret = 0; /* Status Port is readonly */
 265                                         break;
 266
 267                                 default:
 268                                         fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
 269                                         ret = -1;
 270                                         break;
 271                         }
 272                 } else {
 273                         ret = 0;
 274                 }
 275
 276                 tr[i].Data.Byte = val;
 277
 278                 DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
 279                                 (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
 280                                 tr[i].fAutoinc, tr[i].dwOptions);
 281 #ifdef DEBUG
 282                 if (tr[i].cmdTrans == 10)
 283                         DPRINTF("read byte: %d\n", tr[i].Data.Byte);
 284 #endif
 285         }
 286
 287         return ret;
 288 }