diff options
Diffstat (limited to 'arch/powerpc/platforms/powermac/pic.c')
-rw-r--r-- | arch/powerpc/platforms/powermac/pic.c | 72 |
1 files changed, 66 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c index 630a533d0e59..890d5f72b198 100644 --- a/arch/powerpc/platforms/powermac/pic.c +++ b/arch/powerpc/platforms/powermac/pic.c | |||
@@ -46,6 +46,10 @@ struct pmac_irq_hw { | |||
46 | unsigned int level; | 46 | unsigned int level; |
47 | }; | 47 | }; |
48 | 48 | ||
49 | /* Workaround flags for 32bit powermac machines */ | ||
50 | unsigned int of_irq_workarounds; | ||
51 | struct device_node *of_irq_dflt_pic; | ||
52 | |||
49 | /* Default addresses */ | 53 | /* Default addresses */ |
50 | static volatile struct pmac_irq_hw __iomem *pmac_irq_hw[4]; | 54 | static volatile struct pmac_irq_hw __iomem *pmac_irq_hw[4]; |
51 | 55 | ||
@@ -428,6 +432,42 @@ static void __init pmac_pic_probe_oldstyle(void) | |||
428 | setup_irq(irq_create_mapping(NULL, 20), &xmon_action); | 432 | setup_irq(irq_create_mapping(NULL, 20), &xmon_action); |
429 | #endif | 433 | #endif |
430 | } | 434 | } |
435 | |||
436 | int of_irq_map_oldworld(struct device_node *device, int index, | ||
437 | struct of_irq *out_irq) | ||
438 | { | ||
439 | const u32 *ints = NULL; | ||
440 | int intlen; | ||
441 | |||
442 | /* | ||
443 | * Old machines just have a list of interrupt numbers | ||
444 | * and no interrupt-controller nodes. We also have dodgy | ||
445 | * cases where the APPL,interrupts property is completely | ||
446 | * missing behind pci-pci bridges and we have to get it | ||
447 | * from the parent (the bridge itself, as apple just wired | ||
448 | * everything together on these) | ||
449 | */ | ||
450 | while (device) { | ||
451 | ints = of_get_property(device, "AAPL,interrupts", &intlen); | ||
452 | if (ints != NULL) | ||
453 | break; | ||
454 | device = device->parent; | ||
455 | if (device && strcmp(device->type, "pci") != 0) | ||
456 | break; | ||
457 | } | ||
458 | if (ints == NULL) | ||
459 | return -EINVAL; | ||
460 | intlen /= sizeof(u32); | ||
461 | |||
462 | if (index >= intlen) | ||
463 | return -EINVAL; | ||
464 | |||
465 | out_irq->controller = NULL; | ||
466 | out_irq->specifier[0] = ints[index]; | ||
467 | out_irq->size = 1; | ||
468 | |||
469 | return 0; | ||
470 | } | ||
431 | #endif /* CONFIG_PPC32 */ | 471 | #endif /* CONFIG_PPC32 */ |
432 | 472 | ||
433 | static void pmac_u3_cascade(unsigned int irq, struct irq_desc *desc) | 473 | static void pmac_u3_cascade(unsigned int irq, struct irq_desc *desc) |
@@ -559,19 +599,39 @@ static int __init pmac_pic_probe_mpic(void) | |||
559 | 599 | ||
560 | void __init pmac_pic_init(void) | 600 | void __init pmac_pic_init(void) |
561 | { | 601 | { |
562 | unsigned int flags = 0; | ||
563 | |||
564 | /* We configure the OF parsing based on our oldworld vs. newworld | 602 | /* We configure the OF parsing based on our oldworld vs. newworld |
565 | * platform type and wether we were booted by BootX. | 603 | * platform type and wether we were booted by BootX. |
566 | */ | 604 | */ |
567 | #ifdef CONFIG_PPC32 | 605 | #ifdef CONFIG_PPC32 |
568 | if (!pmac_newworld) | 606 | if (!pmac_newworld) |
569 | flags |= OF_IMAP_OLDWORLD_MAC; | 607 | of_irq_workarounds |= OF_IMAP_OLDWORLD_MAC; |
570 | if (of_get_property(of_chosen, "linux,bootx", NULL) != NULL) | 608 | if (of_get_property(of_chosen, "linux,bootx", NULL) != NULL) |
571 | flags |= OF_IMAP_NO_PHANDLE; | 609 | of_irq_workarounds |= OF_IMAP_NO_PHANDLE; |
572 | #endif /* CONFIG_PPC_32 */ | ||
573 | 610 | ||
574 | of_irq_map_init(flags); | 611 | /* If we don't have phandles on a newworld, then try to locate a |
612 | * default interrupt controller (happens when booting with BootX). | ||
613 | * We do a first match here, hopefully, that only ever happens on | ||
614 | * machines with one controller. | ||
615 | */ | ||
616 | if (pmac_newworld && (of_irq_workarounds & OF_IMAP_NO_PHANDLE)) { | ||
617 | struct device_node *np; | ||
618 | |||
619 | for_each_node_with_property(np, "interrupt-controller") { | ||
620 | /* Skip /chosen/interrupt-controller */ | ||
621 | if (strcmp(np->name, "chosen") == 0) | ||
622 | continue; | ||
623 | /* It seems like at least one person wants | ||
624 | * to use BootX on a machine with an AppleKiwi | ||
625 | * controller which happens to pretend to be an | ||
626 | * interrupt controller too. */ | ||
627 | if (strcmp(np->name, "AppleKiwi") == 0) | ||
628 | continue; | ||
629 | /* I think we found one ! */ | ||
630 | of_irq_dflt_pic = np; | ||
631 | break; | ||
632 | } | ||
633 | } | ||
634 | #endif /* CONFIG_PPC32 */ | ||
575 | 635 | ||
576 | /* We first try to detect Apple's new Core99 chipset, since mac-io | 636 | /* We first try to detect Apple's new Core99 chipset, since mac-io |
577 | * is quite different on those machines and contains an IBM MPIC2. | 637 | * is quite different on those machines and contains an IBM MPIC2. |