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Diffstat (limited to 'arch/m68k/mac/oss.c')
-rw-r--r--arch/m68k/mac/oss.c67
1 files changed, 26 insertions, 41 deletions
diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
index 3f81892527ad..921e6c092f2c 100644
--- a/arch/m68k/mac/oss.c
+++ b/arch/m68k/mac/oss.c
@@ -53,56 +53,41 @@ void __init oss_init(void)
}
/*
- * Handle miscellaneous OSS interrupts.
+ * Handle OSS interrupts.
+ * XXX how do you clear a pending IRQ? is it even necessary?
*/
-static void oss_irq(struct irq_desc *desc)
+static void oss_iopism_irq(struct irq_desc *desc)
{
- int events = oss->irq_pending &
- (OSS_IP_IOPSCC | OSS_IP_SCSI | OSS_IP_IOPISM);
-
- if (events & OSS_IP_IOPSCC) {
- oss->irq_pending &= ~OSS_IP_IOPSCC;
- generic_handle_irq(IRQ_MAC_SCC);
- }
-
- if (events & OSS_IP_SCSI) {
- oss->irq_pending &= ~OSS_IP_SCSI;
- generic_handle_irq(IRQ_MAC_SCSI);
- }
-
- if (events & OSS_IP_IOPISM) {
- oss->irq_pending &= ~OSS_IP_IOPISM;
- generic_handle_irq(IRQ_MAC_ADB);
- }
+ generic_handle_irq(IRQ_MAC_ADB);
}
-/*
- * Nubus IRQ handler, OSS style
- *
- * Unlike the VIA/RBV this is on its own autovector interrupt level.
- */
+static void oss_scsi_irq(struct irq_desc *desc)
+{
+ generic_handle_irq(IRQ_MAC_SCSI);
+}
static void oss_nubus_irq(struct irq_desc *desc)
{
- int events, irq_bit, i;
+ u16 events, irq_bit;
+ int irq_num;
events = oss->irq_pending & OSS_IP_NUBUS;
- if (!events)
- return;
-
- /* There are only six slots on the OSS, not seven */
-
- i = 6;
- irq_bit = 0x40;
+ irq_num = NUBUS_SOURCE_BASE + 5;
+ irq_bit = OSS_IP_NUBUS5;
do {
- --i;
- irq_bit >>= 1;
if (events & irq_bit) {
- oss->irq_pending &= ~irq_bit;
- generic_handle_irq(NUBUS_SOURCE_BASE + i);
+ events &= ~irq_bit;
+ generic_handle_irq(irq_num);
}
- } while(events & (irq_bit - 1));
+ --irq_num;
+ irq_bit >>= 1;
+ } while (events);
+}
+
+static void oss_iopscc_irq(struct irq_desc *desc)
+{
+ generic_handle_irq(IRQ_MAC_SCC);
}
/*
@@ -122,14 +107,14 @@ static void oss_nubus_irq(struct irq_desc *desc)
void __init oss_register_interrupts(void)
{
- irq_set_chained_handler(OSS_IRQLEV_IOPISM, oss_irq);
- irq_set_chained_handler(OSS_IRQLEV_SCSI, oss_irq);
+ irq_set_chained_handler(OSS_IRQLEV_IOPISM, oss_iopism_irq);
+ irq_set_chained_handler(OSS_IRQLEV_SCSI, oss_scsi_irq);
irq_set_chained_handler(OSS_IRQLEV_NUBUS, oss_nubus_irq);
- irq_set_chained_handler(OSS_IRQLEV_IOPSCC, oss_irq);
+ irq_set_chained_handler(OSS_IRQLEV_IOPSCC, oss_iopscc_irq);
irq_set_chained_handler(OSS_IRQLEV_VIA1, via1_irq);
/* OSS_VIA1 gets enabled here because it has no machspec interrupt. */
- oss->irq_level[OSS_VIA1] = IRQ_AUTO_6;
+ oss->irq_level[OSS_VIA1] = OSS_IRQLEV_VIA1;
}
/*