+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <linux/parport.h>
+#include <linux/ppdev.h>
+#include "usb-driver.h"
+#include "parport.h"
+
+static int parportfd = -1;
+
+int pp_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
+ int ret = 0;
+ int i;
+ unsigned long port;
+ unsigned char val;
+ static unsigned char last_pp_write = 0;
+
+ 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;
+
+#ifdef DEBUG
+ if (tr[i].cmdTrans == 13)
+ DPRINTF("write byte: %d\n", val);
+#endif
+
+ if (parportfd < 0)
+ return ret;
+
+ if (port == ppbase + PP_DATA) {
+ DPRINTF("data port\n");
+ switch(tr[i].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[i].cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_STATUS) {
+ DPRINTF("status port (last write: %d)\n", last_pp_write);
+ switch(tr[i].cmdTrans) {
+ case PP_READ:
+ ret = ioctl(parportfd, PPRSTATUS, &val);
+#ifdef FORCE_PC3_IDENT
+ val &= 0x5f;
+ if (last_pp_write & 0x40)
+ val |= 0x20;
+ else
+ val |= 0x80;
+#endif
+ break;
+
+ case PP_WRITE:
+ ret = 0; /* Status Port is readonly */
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_CONTROL) {
+ DPRINTF("control port\n");
+ switch(tr[i].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[i].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[i].Data.Byte = val;
+
+ DPRINTF("dwPortReturn: 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);
+#ifdef DEBUG
+ if (tr[i].cmdTrans == 10)
+ DPRINTF("read byte: %d\n", tr[i].Data.Byte);
+#endif
+ }
+
+ return ret;
+}
+
+int parport_open(int num) {
+ char ppdev[32];
+
+ if (parportfd < 0) {
+ snprintf(ppdev, sizeof(ppdev), "/dev/parport%u", num);
+ DPRINTF("opening %s\n", ppdev);
+ parportfd = open(ppdev, O_RDWR|O_EXCL);
+
+ if (parportfd < 0)
+ fprintf(stderr,"Can't open %s: %s\n", ppdev, strerror(errno));
+ }
+
+ if (parportfd >= 0) {
+ int pmode;
+
+ if (ioctl(parportfd, PPCLAIM) == -1)
+ return -1;
+
+ pmode = IEEE1284_MODE_COMPAT;
+ if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
+ return -1;
+
+#if 0
+ if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr) {
+ DPRINTF("ECP mode requested\n");
+ ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
+ /* TODO: Implement ECP mode */
+ pmode = IEEE1284_MODE_ECP;
+
+ if (ioctl(parportfd, PPNEGOT, &pmode) == -1) {
+ ecpbase = 0;
+ pmode = IEEE1284_MODE_COMPAT;
+ if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
+ return ret;
+ }
+ }
+#endif
+ }
+
+ return parportfd;
+}
+
+void parport_close(int handle) {
+ if (parportfd == handle && parportfd >= 0) {
+ ioctl(parportfd, PPRELEASE);
+ close(parportfd);
+ parportfd = -1;
+ }
+}
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