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85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
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/*
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* Ralink RT3662/RT3883 SoC specific interrupt handling
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*
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* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <asm/irq_cpu.h>
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#include <asm/mipsregs.h>
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#include <asm/mach-ralink/common.h>
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#include <asm/mach-ralink/rt3883.h>
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#include <asm/mach-ralink/rt3883_regs.h>
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static void rt3883_intc_irq_dispatch(void)
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{
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u32 pending;
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pending = ramips_intc_get_status();
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if (pending & RT3883_INTC_INT_TIMER0)
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do_IRQ(RT3883_INTC_IRQ_TIMER0);
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else if (pending & RT3883_INTC_INT_TIMER1)
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do_IRQ(RT3883_INTC_IRQ_TIMER1);
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else if (pending & RT3883_INTC_INT_UART0)
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do_IRQ(RT3883_INTC_IRQ_UART0);
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else if (pending & RT3883_INTC_INT_UART1)
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do_IRQ(RT3883_INTC_IRQ_UART1);
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else if (pending & RT3883_INTC_INT_PERFC)
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do_IRQ(RT3883_INTC_IRQ_PERFC);
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else if (pending & RT3883_INTC_INT_UHST)
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do_IRQ(RT3883_INTC_IRQ_UHST);
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/* TODO: handle PIO interrupts as well */
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else
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spurious_interrupt();
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}
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asmlinkage void plat_irq_dispatch(void)
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{
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unsigned long pending;
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pending = read_c0_status() & read_c0_cause() & ST0_IM;
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if (pending & STATUSF_IP7)
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do_IRQ(RT3883_CPU_IRQ_COUNTER);
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else if (pending & STATUSF_IP5)
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do_IRQ(RT3883_CPU_IRQ_FE);
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else if (pending & STATUSF_IP6)
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do_IRQ(RT3883_CPU_IRQ_WLAN);
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else if (pending & STATUSF_IP4)
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do_IRQ(RT3883_CPU_IRQ_PCI);
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else if (pending & STATUSF_IP2)
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rt3883_intc_irq_dispatch();
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else
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spurious_interrupt();
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}
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void __init arch_init_irq(void)
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{
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mips_cpu_irq_init();
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ramips_intc_irq_init(RT3883_INTC_BASE, RT3883_CPU_IRQ_INTC,
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RT3883_INTC_IRQ_BASE);
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cp0_perfcount_irq = RT3883_INTC_IRQ_PERFC;
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}
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