+int pp_transfer(WD_TRANSFER *tr, int fd, unsigned int request, unsigned char *wdioctl) {
+ int ret = 0;
+ unsigned long port = (unsigned long)tr->dwPort;
+ unsigned char val;
+ static int last_pp_write = 0;
+
+ DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
+ (unsigned long)tr->dwPort, tr->cmdTrans, tr->dwBytes,
+ tr->fAutoinc, tr->dwOptions);
+
+ val = tr->Data.Byte;
+
+#ifdef DEBUG
+ if (tr->cmdTrans == 13)
+ DPRINTF("write byte: %d\n", val);
+#endif
+
+#ifndef NO_WINDRVR
+ ret = (*ioctl_func) (fd, request, wdioctl);
+#else
+ if (parportfd < 0)
+ return ret;
+
+ if (port == ppbase + PP_DATA) {
+ DPRINTF("data port\n");
+ switch(tr->cmdTrans) {
+ case PP_READ:
+ ret = 0; /* We don't support reading of the data port */
+ break;
+
+ case PP_WRITE:
+ ret = ioctl(parportfd, PPWDATA, &val);
+ last_pp_write = val;
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr->cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_STATUS) {
+ DPRINTF("status port (last write: %d)\n", last_pp_write);
+ switch(tr->cmdTrans) {
+ case PP_READ:
+ ret = ioctl(parportfd, PPRSTATUS, &val);
+#ifdef FORCE_PC3_IDENT
+ val &= 95;
+ if (last_pp_write & 64)
+ val |= 32;
+ else
+ val |= 128;
+#endif
+ break;
+
+ case PP_WRITE:
+ ret = 0; /* Status Port is readonly */
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr->cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_CONTROL) {
+ DPRINTF("control port\n");
+ switch(tr->cmdTrans) {
+ case PP_READ:
+ ret = ioctl(parportfd, PPRCONTROL, &val);
+ break;
+
+ case PP_WRITE:
+ ret = ioctl(parportfd, PPWCONTROL, &val);
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr->cmdTrans);
+ ret = -1;
+ break;
+ }
+ } 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;
+ }
+
+ tr->Data.Byte = val;
+#endif
+
+ DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
+ (unsigned long)tr->dwPort, tr->cmdTrans, tr->dwBytes,
+ tr->fAutoinc, tr->dwOptions);
+#ifdef DEBUG
+ if (tr->cmdTrans == 10)
+ DPRINTF("read byte: %d\n", tr->Data.Byte);
+#endif
+
+ return ret;
+}
+