bcma: mips: show also disabled IRQs

Some cores do not have a IRQ assigned and some do not support when an
IRQ is assigned to them, this is now handled and printed out in the
code.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/bcma/driver_mips.c

@@ -74,11 +74,16 @@ static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
 		return dev->core_index;
 	flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
 
-	return flag & 0x1F;
+	if (flag)
+		return flag & 0x1F;
+	else
+		return 0x3f;
 }
 
 /* Get the MIPS IRQ assignment for a specified device.
  * If unassigned, 0 is returned.
+ * If disabled, 5 is returned.
+ * If not supported, 6 is returned.
  */
 unsigned int bcma_core_mips_irq(struct bcma_device *dev)
 {
@@ -87,13 +92,15 @@ unsigned int bcma_core_mips_irq(struct bcma_device *dev)
 	unsigned int irq;
 
 	irqflag = bcma_core_mips_irqflag(dev);
+	if (irqflag == 0x3f)
+		return 6;
 
-	for (irq = 1; irq <= 4; irq++)
+	for (irq = 0; irq <= 4; irq++)
 		if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
 		    (1 << irqflag))
 			return irq;
 
-	return 0;
+	return 5;
 }
 EXPORT_SYMBOL(bcma_core_mips_irq);
 
@@ -114,7 +121,7 @@ static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
 		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
 			    bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
 			    ~(1 << irqflag));
-	else
+	else if (oldirq != 5)
 		bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
 
 	/* assign the new one */
@@ -144,7 +151,7 @@ static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
 	}
 
 	bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
-		   dev->id.id, oldirq + 2, irq + 2);
+		   dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
 }
 
 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,