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16a1a66a5e
Mac interrupt code has been debugged. The Penguin deficiencies that still cause unhandled interrupts aren't fixable here. Besides, interrupts are fast and frequent and these printk statements were never really useful IMO. Remove them. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
/*
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* Baboon Custom IC Management
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*
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* The Baboon custom IC controls the IDE, PCMCIA and media bay on the
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* PowerBook 190. It multiplexes multiple interrupt sources onto the
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* Nubus slot $C interrupt.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/irq.h>
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#include <asm/macintosh.h>
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#include <asm/macints.h>
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#include <asm/mac_baboon.h>
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int baboon_present;
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static volatile struct baboon *baboon;
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#if 0
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extern int macide_ack_intr(struct ata_channel *);
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#endif
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/*
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* Baboon initialization.
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*/
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void __init baboon_init(void)
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{
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if (macintosh_config->ident != MAC_MODEL_PB190) {
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baboon = NULL;
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baboon_present = 0;
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return;
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}
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baboon = (struct baboon *) BABOON_BASE;
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baboon_present = 1;
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printk("Baboon detected at %p\n", baboon);
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}
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/*
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* Baboon interrupt handler. This works a lot like a VIA.
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*/
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static void baboon_irq(struct irq_desc *desc)
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{
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int irq_bit, irq_num;
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unsigned char events;
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events = baboon->mb_ifr & 0x07;
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if (!events)
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return;
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irq_num = IRQ_BABOON_0;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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baboon->mb_ifr &= ~irq_bit;
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generic_handle_irq(irq_num);
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}
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irq_bit <<= 1;
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irq_num++;
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} while(events >= irq_bit);
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#if 0
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if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);
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/* for now we need to smash all interrupts */
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baboon->mb_ifr &= ~events;
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#endif
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}
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/*
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* Register the Baboon interrupt dispatcher on nubus slot $C.
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*/
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void __init baboon_register_interrupts(void)
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{
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irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
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}
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/*
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* The means for masking individual Baboon interrupts remains a mystery.
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* However, since we only use the IDE IRQ, we can just enable/disable all
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* Baboon interrupts. If/when we handle more than one Baboon IRQ, we must
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* either figure out how to mask them individually or else implement the
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* same workaround that's used for NuBus slots (see nubus_disabled and
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* via_nubus_irq_shutdown).
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*/
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void baboon_irq_enable(int irq)
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{
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mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
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}
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void baboon_irq_disable(int irq)
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{
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mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
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}
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