From 8d0fc60587eda616dc0697ba55a50cfe04edb3a6 Mon Sep 17 00:00:00 2001
From: wentasah <wentasah>
Date: Tue, 27 Apr 2004 16:34:15 +0000
Subject: [PATCH] Added skeleton of IRQ support on VME bus

---
 lincan/include/constants.h |  1 +
 lincan/src/setup.c         | 30 +++++++++++++++++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/lincan/include/constants.h b/lincan/include/constants.h
index e466e2d..4e18c7b 100644
--- a/lincan/include/constants.h
+++ b/lincan/include/constants.h
@@ -73,6 +73,7 @@
 #define CHIP_SEGMENTED   (1<<1)
 #define CHIP_IRQ_SETUP   (1<<2)
 #define CHIP_IRQ_PCI     (1<<3)
+#define CHIP_IRQ_VME     (1<<4)
 
 /* These flags can be used for the candevices_t structure flags data entry */
 #define CANDEV_PROGRAMMABLE_IRQ (1<<0)
diff --git a/lincan/src/setup.c b/lincan/src/setup.c
index 83eef72..c071b00 100644
--- a/lincan/src/setup.c
+++ b/lincan/src/setup.c
@@ -611,11 +611,19 @@ int can_chip_setup_irq(struct chip_t *chip)
 	if(!chip->chipspecops->irq_handler)
 		return 0;
 			
-	if (request_irq(chip->chip_irq,chip->chipspecops->irq_handler,SA_SHIRQ,DEVICE_NAME,chip))
-		return -1;
-	else {
-		DEBUGMSG("Registered interrupt %d\n",chip->chip_irq);
-		chip->flags |= CHIP_IRQ_SETUP;
+	if ((chip->flags & CHIP_IRQ_VME) == 0) {
+		if (request_irq(chip->chip_irq,chip->chipspecops->irq_handler,SA_SHIRQ,DEVICE_NAME,chip))
+			return -1;
+		else {
+			DEBUGMSG("Registered interrupt %d\n",chip->chip_irq);
+			chip->flags |= CHIP_IRQ_SETUP;
+		}
+	} else {
+#ifdef CAN_ENABLE_VME_SUPPORT		
+		/* TODO: Move here the irq setup from
+		 * unican_vme_request_io(). To do this, the VME bridge
+		 * driver should be modified. */
+#endif
 	}
 	return 1;
 }
@@ -628,8 +636,16 @@ int can_chip_setup_irq(struct chip_t *chip)
 void can_chip_free_irq(struct chip_t *chip)
 {
 	if((chip->flags & CHIP_IRQ_SETUP) && (chip->chip_irq>=0)) {
-		free_irq(chip->chip_irq, chip);
-		chip->flags &= ~CHIP_IRQ_SETUP;
+		if ((chip->flags & CHIP_IRQ_VME) == 0)
+			free_irq(chip->chip_irq, chip);
+		else { 
+#ifdef CAN_ENABLE_VME_SUPPORT
+		/* TODO: Move here the irq cleanup from
+		 * unican_vme_release_io(). To do this, the VME bridge
+		 * driver should be modified. */
+#endif
+		}
+			chip->flags &= ~CHIP_IRQ_SETUP;
 	}
 }
 
-- 
2.39.2