1 files changed, 86 insertions, 0 deletions
diff --git a/private/ntos/miniport/trantor/source/parallel.c b/private/ntos/miniport/trantor/source/parallel.c
new file mode 100644
index 000000000..f88c8ad2e
--- /dev/null
+++ b/private/ntos/miniport/trantor/source/parallel.c
@@ -0,0 +1,86 @@
+#ifdef i386
+//--------------------------------------------------------------------
+//
+//  PARALLEL.C 
+//
+//  Parallel port access file.
+//
+//  Revisions:
+//      09-01-92  KJB   First.
+//      03-11-93  JAP   Changed retcode equates to reflect new names.
+//      03-25-93  JAP   Fixed up typedef and prototype inconsistencies
+//--------------------------------------------------------------------
+
+#include CARDTXXX_H
+
+//
+//  ParallelWaitBusy
+//
+//  This routine waits until the busy line is 1.
+//
+
+USHORT ParallelWaitBusy (PBASE_REGISTER baseIoAddress, ULONG usec, PUCHAR data)
+{
+    ULONG i;
+
+    // see if the flag comes back quickly
+
+    for (i = 0; i < TIMEOUT_QUICK; i++) {
+        ParallelPortGet (baseIoAddress, PARALLEL_STATUS, data);
+        if (*data & P_BUSY) {
+            return 0;
+        }
+    }
+
+    // ok, it did not come back quickly, we will yield to other processes
+
+    for (i = 0; i < usec; i++) {
+        ParallelPortGet (baseIoAddress, PARALLEL_STATUS, data);
+        if (*data & P_BUSY) {
+            return 0;
+        }
+        ScsiPortStallExecution (1);
+    }
+
+    // return with an error, non-zero indicates timeout 
+
+    return RET_STATUS_TIMEOUT;
+}
+
+
+//
+//  ParallelWaitNoBusy
+//
+//  This routine waits until the busy line is 0.
+//
+
+USHORT ParallelWaitNoBusy (PBASE_REGISTER baseIoAddress, ULONG usec, PUCHAR data)
+{
+    ULONG i;
+
+    // see if the flag comes back quickly
+
+    for (i = 0; i < TIMEOUT_QUICK; i++) {
+        ParallelPortGet (baseIoAddress, PARALLEL_STATUS, data);
+        if (!(*data & P_BUSY)) {
+            return 0;
+        }
+    }
+
+    // ok, it did not come back quickly, we will yield to other processes
+
+    for (i = 0; i < usec; i++) {
+        ParallelPortGet (baseIoAddress, PARALLEL_STATUS, data);
+        if (!(*data & P_BUSY)) {
+            return 0;
+        }
+        ScsiPortStallExecution (1);
+    }
+
+    // return with an error, non-zero indicates timeout 
+
+    return RET_STATUS_TIMEOUT;
+}
+
+
+#endif