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