int M68328_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
if (irq >= INTERNAL_IRQS) {
printk ("%s: Unknown IRQ %d from %s\n", __FUNCTION__, irq, devname);
return -ENXIO;
}
if (!int_irq_list[irq]) {
int_irq_list[irq] = new_irq_node();
int_irq_list[irq]->flags = IRQ_FLG_STD;
}
if (!(int_irq_list[irq]->flags & IRQ_FLG_STD)) {
if (int_irq_list[irq]->flags & IRQ_FLG_LOCK) {
printk("%s: IRQ %d from %s is not replaceable\n",
__FUNCTION__, irq, int_irq_list[irq]->devname);
return -EBUSY;
}
if (flags & IRQ_FLG_REPLACE) {
printk("%s: %s can't replace IRQ %d from %s\n",
__FUNCTION__, devname, irq, int_irq_list[irq]->devname);
return -EBUSY;
}
}
int_irq_list[irq]->handler = handler;
int_irq_list[irq]->flags = flags;
int_irq_list[irq]->dev_id = dev_id;
int_irq_list[irq]->devname = devname;
/* enable in the IMR */
if (!int_irq_ablecount[irq])
*(volatile unsigned long *)0xfffff304 &= ~(1<<irq);
return 0;
}
int atari_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
int vector;
unsigned long oflags = flags;
/*
* The following is a hack to make some PCI card drivers work,
* which set the SA_SHIRQ flag.
*/
flags &= ~SA_SHIRQ;
if (flags == SA_INTERRUPT) {
printk ("%s: SA_INTERRUPT changed to IRQ_TYPE_SLOW for %s\n",
__FUNCTION__, devname);
flags = IRQ_TYPE_SLOW;
}
if (flags < IRQ_TYPE_SLOW || flags > IRQ_TYPE_PRIO) {
printk ("%s: Bad irq type 0x%lx <0x%lx> requested from %s\n",
__FUNCTION__, flags, oflags, devname);
return -EINVAL;
}
if (!IS_VALID_INTNO(irq)) {
printk ("%s: Unknown irq %d requested from %s\n",
__FUNCTION__, irq, devname);
return -ENXIO;
}
vector = IRQ_SOURCE_TO_VECTOR(irq);
/*
* Check type/source combination: slow ints are (currently)
* only possible for MFP-interrupts.
*/
if (flags == IRQ_TYPE_SLOW &&
(irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE)) {
printk ("%s: Slow irq requested for non-MFP source %d from %s\n",
__FUNCTION__, irq, devname);
return -EINVAL;
}
if (vectors[vector] == bad_interrupt) {
/* int has no handler yet */
irq_handler[irq].handler = handler;
irq_handler[irq].dev_id = dev_id;
irq_param[irq].flags = flags;
irq_param[irq].devname = devname;
vectors[vector] =
(flags == IRQ_TYPE_SLOW) ? slow_handlers[irq-STMFP_SOURCE_BASE] :
(flags == IRQ_TYPE_FAST) ? atari_fast_irq_handler :
atari_prio_irq_handler;
/* If MFP int, also enable and umask it */
atari_turnon_irq(irq);
atari_enable_irq(irq);
return 0;
}
else if (irq_param[irq].flags == flags) {
/* old handler is of same type -> handlers can be chained */
irq_node_t *node;
unsigned long flags;
save_flags(flags);
cli();
if (irq_handler[irq].handler != atari_call_irq_list) {
/* Only one handler yet, make a node for this first one */
if (!(node = new_irq_node()))
return -ENOMEM;
node->handler = irq_handler[irq].handler;
node->dev_id = irq_handler[irq].dev_id;
node->devname = irq_param[irq].devname;
node->next = NULL;
irq_handler[irq].handler = atari_call_irq_list;
irq_handler[irq].dev_id = node;
irq_param[irq].devname = "chained";
}
if (!(node = new_irq_node()))
return -ENOMEM;
node->handler = handler;
node->dev_id = dev_id;
node->devname = devname;
/* new handlers are put in front of the queue */
node->next = irq_handler[irq].dev_id;
irq_handler[irq].dev_id = node;
restore_flags(flags);
return 0;
} else {
printk ("%s: Irq %d allocated by other type int (call from %s)\n",
__FUNCTION__, irq, devname);
return -EBUSY;
}
}
