void baboon_irq_enable(int irq)
{
int irq_idx = IRQ_IDX(irq);
#ifdef DEBUG_IRQUSE
printk("baboon_irq_enable(%d)\n", irq);
#endif
baboon_disabled &= ~(1 << irq_idx);
if (!baboon_disabled)
mac_enable_irq(IRQ_NUBUS_C);
}
static void mac_scsi_reset_boot(struct Scsi_Host *instance)
{
unsigned long end;
NCR5380_local_declare();
NCR5380_setup(instance);
/*
* Do a SCSI reset to clean up the bus during initialization. No messing
* with the queues, interrupts, or locks necessary here.
*/
printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." );
/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
mac_disable_irq(IRQ_MAC_SCSI);
/* get in phase */
NCR5380_write( TARGET_COMMAND_REG,
PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
/* assert RST */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
/* The min. reset hold time is 25us, so 40us should be enough */
udelay( 50 );
/* reset RST and interrupt */
NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
NCR5380_read( RESET_PARITY_INTERRUPT_REG );
for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
barrier();
/* switch on SCSI IRQ again */
mac_enable_irq(IRQ_MAC_SCSI);
printk(KERN_INFO " done\n" );
}
int mac_request_irq(unsigned int irq,
irqreturn_t (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
irq_node_t *node;
#ifdef DEBUG_MACINTS
printk ("%s: irq %d requested for %s\n", __FUNCTION__, irq, devname);
#endif
if (irq < VIA1_SOURCE_BASE) {
return sys_request_irq(irq, handler, flags, devname, dev_id);
}
if (irq >= NUM_MAC_SOURCES) {
printk ("%s: unknown irq %d requested by %s\n",
__FUNCTION__, irq, devname);
}
/* Get a node and stick it onto the right list */
if (!(node = new_irq_node())) return -ENOMEM;
node->handler = handler;
node->flags = flags;
node->dev_id = dev_id;
node->devname = devname;
node->next = NULL;
mac_insert_irq(&mac_irq_list[irq], node);
/* Now enable the IRQ source */
mac_enable_irq(irq);
return 0;
}
