static struct megamod_pic * __init init_megamod_pic(struct device_node *np)
{
struct megamod_pic *pic;
int i, irq;
int mapping[NR_MUX_OUTPUTS];
pr_info("Initializing C64x+ Megamodule PIC\n");
pic = kzalloc(sizeof(struct megamod_pic), GFP_KERNEL);
if (!pic) {
pr_err("%s: Could not alloc PIC structure.\n", np->full_name);
return NULL;
}
pic->irqhost = irq_domain_add_linear(np, NR_COMBINERS * 32,
&megamod_domain_ops, pic);
if (!pic->irqhost) {
pr_err("%s: Could not alloc host.\n", np->full_name);
goto error_free;
}
pic->irqhost->host_data = pic;
raw_spin_lock_init(&pic->lock);
pic->regs = of_iomap(np, 0);
if (!pic->regs) {
pr_err("%s: Could not map registers.\n", np->full_name);
goto error_free;
}
/* */
for (i = 0; i < ARRAY_SIZE(mapping); i++)
mapping[i] = IRQ_UNMAPPED;
parse_priority_map(pic, mapping, ARRAY_SIZE(mapping));
/*
*/
for (i = 0; i < NR_COMBINERS; i++) {
irq = irq_of_parse_and_map(np, i);
if (irq == NO_IRQ)
continue;
/*
*/
if (irq < 4 || irq >= NR_PRIORITY_IRQS) {
pr_err("%s: combiner-%d virq %d out of range!\n",
np->full_name, i, irq);
continue;
}
/* */
mapping[irq - 4] = i;
pr_debug("%s: combiner-%d cascading to virq %d\n",
np->full_name, i, irq);
cascade_data[i].pic = pic;
cascade_data[i].index = i;
/* */
soc_writel(~0, &pic->regs->evtmask[i]);
soc_writel(~0, &pic->regs->evtclr[i]);
irq_set_handler_data(irq, &cascade_data[i]);
irq_set_chained_handler(irq, megamod_irq_cascade);
}
/* */
for (i = 0; i < NR_MUX_OUTPUTS; i++) {
if (mapping[i] != IRQ_UNMAPPED) {
pr_debug("%s: setting mux %d to priority %d\n",
np->full_name, mapping[i], i + 4);
set_megamod_mux(pic, mapping[i], i);
}
}
return pic;
error_free:
kfree(pic);
return NULL;
}
static struct megamod_pic * __init init_megamod_pic(struct device_node *np)
{
struct megamod_pic *pic;
int i, irq;
int mapping[NR_MUX_OUTPUTS];
pr_info("Initializing C64x+ Megamodule PIC\n");
pic = kzalloc(sizeof(struct megamod_pic), GFP_KERNEL);
if (!pic) {
pr_err("%s: Could not alloc PIC structure.\n", np->full_name);
return NULL;
}
pic->irqhost = irq_alloc_host(np, IRQ_HOST_MAP_LINEAR,
NR_COMBINERS * 32, &megamod_host_ops,
IRQ_UNMAPPED);
if (!pic->irqhost) {
pr_err("%s: Could not alloc host.\n", np->full_name);
goto error_free;
}
pic->irqhost->host_data = pic;
raw_spin_lock_init(&pic->lock);
pic->regs = of_iomap(np, 0);
if (!pic->regs) {
pr_err("%s: Could not map registers.\n", np->full_name);
goto error_free;
}
/* Initialize MUX map */
for (i = 0; i < ARRAY_SIZE(mapping); i++)
mapping[i] = IRQ_UNMAPPED;
parse_priority_map(pic, mapping, ARRAY_SIZE(mapping));
/*
* We can have up to 12 interrupts cascading to the core controller.
* These cascades can be from the combined interrupt sources or for
* individual interrupt sources. The "interrupts" property only
* deals with the cascaded combined interrupts. The individual
* interrupts muxed to the core controller use the core controller
* as their interrupt parent.
*/
for (i = 0; i < NR_COMBINERS; i++) {
irq = irq_of_parse_and_map(np, i);
if (irq == NO_IRQ)
continue;
/*
* We count on the core priority interrupts (4 - 15) being
* direct mapped. Check that device tree provided something
* in that range.
*/
if (irq < 4 || irq >= NR_PRIORITY_IRQS) {
pr_err("%s: combiner-%d virq %d out of range!\n",
np->full_name, i, irq);
continue;
}
/* record the mapping */
mapping[irq - 4] = i;
pr_debug("%s: combiner-%d cascading to virq %d\n",
np->full_name, i, irq);
cascade_data[i].pic = pic;
cascade_data[i].index = i;
/* mask and clear all events in combiner */
soc_writel(~0, &pic->regs->evtmask[i]);
soc_writel(~0, &pic->regs->evtclr[i]);
irq_set_handler_data(irq, &cascade_data[i]);
irq_set_chained_handler(irq, megamod_irq_cascade);
}
/* Finally, set up the MUX registers */
for (i = 0; i < NR_MUX_OUTPUTS; i++) {
if (mapping[i] != IRQ_UNMAPPED) {
pr_debug("%s: setting mux %d to priority %d\n",
np->full_name, mapping[i], i + 4);
set_megamod_mux(pic, mapping[i], i);
}
}
return pic;
error_free:
kfree(pic);
return NULL;
}