49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <asm/traps.h>
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#include <asm/apollohw.h>
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unsigned int apollo_irq_startup(struct irq_data *data)
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{
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unsigned int irq = data->irq;
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if (irq < 8)
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*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
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else
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*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
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return 0;
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}
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void apollo_irq_shutdown(struct irq_data *data)
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{
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unsigned int irq = data->irq;
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if (irq < 8)
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*(volatile unsigned char *)(pica+1) |= (1 << irq);
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else
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*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
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}
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void apollo_irq_eoi(struct irq_data *data)
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{
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*(volatile unsigned char *)(pica) = 0x20;
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*(volatile unsigned char *)(picb) = 0x20;
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}
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static struct irq_chip apollo_irq_chip = {
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.name = "apollo",
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.irq_startup = apollo_irq_startup,
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.irq_shutdown = apollo_irq_shutdown,
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.irq_eoi = apollo_irq_eoi,
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};
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void __init dn_init_IRQ(void)
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{
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m68k_setup_user_interrupt(VEC_USER + 96, 16);
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m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
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IRQ_APOLLO, 16);
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}
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