unify parallel and jtagkey interface

[usb-driver] / parport.c

diff --git a/parport.c b/parport.c
new file mode 100644 (file)
index 0000000..9cf35cd
--- /dev/null
+++ b/parport.c
@@ -0,0 +1,168 @@
+#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;
+       }
+}