Add support for Parallel Cable III (and clones)
authormichael <michael>
Wed, 14 Mar 2007 23:13:37 +0000 (23:13 +0000)
committermichael <michael>
Wed, 14 Mar 2007 23:13:37 +0000 (23:13 +0000)
README
usb-driver.c
usb-driver.h

diff --git a/README b/README
index 8d3ca256405fb8f592e7b04e0cb5c109fa595b6c..ae60eebdc5e973a112a752da71c46ad5feaf3d5a 100644 (file)
--- a/README
+++ b/README
@@ -1,10 +1,13 @@
-This library emulates Jungo Windrvr USB functions in userspace which are
-required by XILINX impact to access the Platform cable USB. With this library
-it is possible to access the cable without loading a proprietary kernel module
-which breaks with every new kernel release. It uses the USB functions provided
-by the libusb userspace library instead and should work on every kernel version
-which is supported by libusb. It was written against impact from ISE Webpack
-9.1SP1 and tested with the following software:
+This library emulates Jungo Windrvr USB and parallel port functions in
+userspace which are required by XILINX impact to access the Platform cable USB
+and Parallel Cable III.
+With this library it is possible to access the cables without loading a
+proprietary kernel module which breaks with every new kernel release. It uses
+the functions provided by the libusb userspace library for USB access and
+the kernel interface at /dev/parport0 for parallel port access instead and
+should work on every kernel version which is supported by libusb and supports
+ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with
+the following software:
 
  * ISE Webpack 9.1SP2
  * ISE Webpack 9.1SP1
@@ -21,7 +24,11 @@ $ export LD_PRELOAD=/path/to/libusb-driver.so  (for sh shells)
 $ setenv LD_PRELOAD /path/to/libusb-driver.so  (for csh shells)
 $ impact
 
-To use the device as ordinary user, put the following line in a new
+
+Notes for the USB cable
+=======================
+
+To use the device as an ordinary user, put the following line in a new
 file in /etc/udev/rules.d/ and restart udev:
 ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"
 
@@ -40,3 +47,20 @@ these steps:
 3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex
 
 4. restart udev and re-plug the cable
+
+
+Notes for the parallel cable
+============================
+
+To access the parallel port from userspace, the kernel needs to be built with
+the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware"
+(CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers"
+(CONFIG_PPDEV) builtin or as modules. If these features are built as modules,
+they need to be loaded before using this library.
+These modules are called:
+parport
+parport_pc
+ppdev
+
+
+To use the device as an ordinary user, put the user in the group 'lp'
index 825c35cf3e4d4a4df33626d5b2fb84937db1411c..881b67bf050fb19f5a45efe0620062e729d63a07 100644 (file)
@@ -1,4 +1,4 @@
-/* libusb connector for XILINX impact
+/* libusb/ppdev connector for XILINX impact
  *
  * Copyright (c) 2007 Michael Gernoth <michael@gernoth.net>
  *
 #include <pthread.h>
 #include <errno.h>
 #include <inttypes.h>
+#include <sys/ioctl.h>
+#include <linux/parport.h>
+#include <linux/ppdev.h>
 #include "usb-driver.h"
 
 static int (*ioctl_func) (int, int, void *) = NULL;
 static int windrvrfd = -1;
+static int parportfd = -1;
+static int parportnum = 0;
+static unsigned long ppbase = 0;
+static unsigned long ecpbase = 0;
 FILE *modulesfp = NULL;
 static int modules_read = 0;
 static struct usb_bus *busses = NULL;
@@ -53,7 +60,6 @@ static int ints_enabled = 0;
 static pthread_mutex_t int_wait = PTHREAD_MUTEX_INITIALIZER;
 
 #define NO_WINDRVR 1
-#undef PARPORT
 
 #ifdef DEBUG
 #define DPRINTF(format, args...) fprintf(stderr, format, ##args)
@@ -233,18 +239,55 @@ int usb_deviceinfo(unsigned char *buf) {
 
 int pp_transfer(WD_TRANSFER *tr, int fd, unsigned int request, unsigned char *wdioctl) {
        int ret = 0;
+       unsigned char val;
 
        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", tr->Data.Byte);
+               DPRINTF("write byte: %d\n", val);
 #endif
 
 #ifndef NO_WINDRVR
        ret = (*ioctl_func) (fd, request, wdioctl);
+#else
+       if (parportfd < 0)
+               return ret;
+
+       switch(tr->cmdTrans) {
+               case 10: /* Read Byte */
+                       if ((unsigned long)tr->dwPort == ppbase) { /* Data Port */
+                               ret = 0; /* We don't support reading of the data port */
+                       } else if ((unsigned long)tr->dwPort == ppbase + 1) { /* Status Port */
+                               DPRINTF("status port\n");
+                               ret = ioctl(parportfd, PPRSTATUS, &val);
+                       } else if ((unsigned long)tr->dwPort == ppbase + 2) { /* Control Port */
+                               DPRINTF("control port\n");
+                               ret = ioctl(parportfd, PPRCONTROL, &val);
+                       }
+                       break;
+               case 13: /* Write Byte */
+                       if ((unsigned long)tr->dwPort == ppbase) { /* Data Port */
+                               DPRINTF("data port\n");
+                               ret = ioctl(parportfd, PPWDATA, &val);
+                       } else if ((unsigned long)tr->dwPort == ppbase + 1) { /* Status Port */
+                               ret = 0; /* Status Port is readonly */
+                       } else if ((unsigned long)tr->dwPort == ppbase + 2) { /* Control Port */
+                               DPRINTF("control port\n");
+                               ret = ioctl(parportfd, PPWCONTROL, &val);
+                       }
+                       break;
+               default:
+                       fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr->cmdTrans);
+                       ret = -1;
+                       break;
+       }
+
+       tr->Data.Byte = val;
 #endif
 
        DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
@@ -282,20 +325,62 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
 
                case CARD_REGISTER_OLD:
                case CARD_REGISTER:
-                       /* TODO: Implement for LPT-support */
-#ifdef PARPORT
+                       DPRINTF("CARD_REGISTER\n");
                        {
                                struct card_register* cr = (struct card_register*)(wdheader->data);
+                               char ppdev[32];
+
+                               DPRINTF("Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
+                               cr->Card.dwItems,
+                               (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
+                               cr->Card.Item[0].I.IO.dwBytes,
+                               cr->Card.Item[0].I.IO.dwBar);
+                               
+                               DPRINTF("Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
+                               cr->Card.dwItems,
+                               (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
+                               cr->Card.Item[1].I.IO.dwBytes,
+                               cr->Card.Item[1].I.IO.dwBar);
 #ifndef NO_WINDRVR
                                ret = (*ioctl_func) (fd, request, wdioctl);
 #else
-                               /* TODO: Open /dev/parport, check, ... */
-                               cr->hCard = 1;
+                               if (parportfd < 0) {
+                                       snprintf(ppdev, sizeof(ppdev), "/dev/parport%d", parportnum);
+                                       DPRINTF("opening %s\n", ppdev);
+                                       parportfd = open(ppdev, O_RDWR|O_EXCL);
+                                       parportnum++;
+                               }
+
+                               if (parportfd >= 0) {
+                                       int pmode;
+
+                                       if (ioctl(parportfd, PPCLAIM) == -1)
+                                               return ret;
+
+                                       pmode = IEEE1284_MODE_COMPAT;
+                                       if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
+                                               return ret;
+                                       
+                                       if (cr->Card.dwItems > 1) {
+                                               ecpbase = cr->Card.Item[1].I.IO.dwBytes;
+                                               /* TODO: Implement ECP mode */
+#if 0
+                                               pmode = IEEE1284_MODE_ECP;
+
+                                               if (ioctl(parportfd, PPNEGOT, &pmode) == -1) {
+                                                       pmode = IEEE1284_MODE_COMPAT;
+                                                       if (ioctl(parportfd, PPNEGOT, &pmode) == -1)
+                                                               return ret;
+                                               }
+#endif
+                                       }
+
+                                       cr->hCard = parportfd;
+                                       ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
+                               }
 #endif
                                DPRINTF("hCard: %lu\n", cr->hCard);
                        }
-#endif
-                       DPRINTF("CARD_REGISTER\n");
                        break;
 
                case USB_TRANSFER:
@@ -565,6 +650,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                        }
                        break;
 
+               case MULTI_TRANSFER_OLD:
                case MULTI_TRANSFER:
                        DPRINTF("MULTI_TRANSFER\n");
                        {
@@ -633,9 +719,27 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
 
                case CARD_UNREGISTER:
                        DPRINTF("CARD_UNREGISTER\n");
+                       {
+                               struct card_register* cr = (struct card_register*)(wdheader->data);
+
+                               DPRINTF("Addr: 0x%lx, bytes: %lu, bar: %lu\n",
+                               (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
+                               cr->Card.Item[0].I.IO.dwBytes,
+                               cr->Card.Item[0].I.IO.dwBar);
+
+                               DPRINTF("hCard: %lu\n", cr->hCard);
+
 #ifndef NO_WINDRVR
-                       ret = (*ioctl_func) (fd, request, wdioctl);
+                               ret = (*ioctl_func) (fd, request, wdioctl);
+#else
+                               if (parportfd == cr->hCard && parportfd >= 0) {
+                                       ioctl(parportfd, PPRELEASE);
+                                       close(parportfd);
+                                       parportfd = -1;
+                                       parportnum--;
+                               }
 #endif
+                       }
                        break;
 
                case EVENT_PULL:
@@ -718,7 +822,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
        return ret;
 }
 
-int ioctl(int fd, int request, ...) {
+int ioctl(int fd, unsigned long int request, ...) {
        va_list args;
        void *argp;
        int ret;
@@ -826,7 +930,7 @@ char *fgets(char *s, int size, FILE *stream) {
                func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
        
        if (modulesfp == stream) {
-               if (modules_read < sizeof(modules)) {
+               if (modules_read < sizeof(modules) / sizeof(modules[0])) {
                        strcpy(s, modules[modules_read]);
                        ret = s;
                        modules_read++;
index 1c8c7795da2306f00ea7072c91b5d222922bcb46..77b60f2ae48da53c9d47ce5d92cf61d14c9aebd4 100644 (file)
@@ -18,6 +18,7 @@
 #define USB_GET_DEVICE_DATA_OLD        0x980
 #define EVENT_REGISTER_OLD     0x986
 #define TRANSFER_OLD           0x903
+#define MULTI_TRANSFER_OLD     0x904
 
 #define MAGIC 0xa410b413UL
 
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