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48 lines
1.1 KiB
48 lines
1.1 KiB
// 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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