patch-2.4.5 linux/include/linux/parport_pc.h

• Lines: 52
• Date: Sat May 19 18:07:04 2001
• Orig file: v2.4.4/linux/include/linux/parport_pc.h
• Orig date: Mon Dec 11 12:50:09 2000

diff -u --recursive --new-file v2.4.4/linux/include/linux/parport_pc.h linux/include/linux/parport_pc.h
@@ -59,6 +59,51 @@
 	return val;
 }
 
+#ifdef DEBUG_PARPORT
+extern __inline__ void dump_parport_state (char *str, struct parport *p)
+{
+	/* here's hoping that reading these ports won't side-effect anything underneath */
+	unsigned char ecr = inb (ECONTROL (p));
+	unsigned char dcr = inb (CONTROL (p));
+	unsigned char dsr = inb (STATUS (p));
+	static char *ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
+	const struct parport_pc_private *priv = (parport_pc_private *)p->physport->private_data;
+	int i;
+
+	printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
+	if (ecr & 0x10) printk (",nErrIntrEn");
+	if (ecr & 0x08) printk (",dmaEn");
+	if (ecr & 0x04) printk (",serviceIntr");
+	if (ecr & 0x02) printk (",f_full");
+	if (ecr & 0x01) printk (",f_empty");
+	for (i=0; i<2; i++) {
+		printk ("]  dcr(%s)=[", i ? "soft" : "hard");
+		dcr = i ? priv->ctr : inb (CONTROL (p));
+	
+		if (dcr & 0x20) {
+			printk ("rev");
+		} else {
+			printk ("fwd");
+		}
+		if (dcr & 0x10) printk (",ackIntEn");
+		if (!(dcr & 0x08)) printk (",N-SELECT-IN");
+		if (dcr & 0x04) printk (",N-INIT");
+		if (!(dcr & 0x02)) printk (",N-AUTOFD");
+		if (!(dcr & 0x01)) printk (",N-STROBE");
+	}
+	printk ("]  dsr=[");
+	if (!(dsr & 0x80)) printk ("BUSY");
+	if (dsr & 0x40) printk (",N-ACK");
+	if (dsr & 0x20) printk (",PERROR");
+	if (dsr & 0x10) printk (",SELECT");
+	if (dsr & 0x08) printk (",N-FAULT");
+	printk ("]\n");
+	return;
+}
+#else	/* !DEBUG_PARPORT */
+#define dump_parport_state(args...)
+#endif	/* !DEBUG_PARPORT */
+
 /* __parport_pc_frob_control differs from parport_pc_frob_control in that
  * it doesn't do any extra masking. */
 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,