diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2012-02-13 15:17:59 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2012-02-13 15:17:59 +0000 |
| commit | e532fa5fd42501e468051addfac454ab70128b04 (patch) | |
| tree | 4ee21b4ab08ac16ca698ea7b263143a3ad4a4f46 /target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c | |
| parent | 3bfbc69bc20091d4b9ae0cd065388b1fdab4978f (diff) | |
| download | mtk-20170518-e532fa5fd42501e468051addfac454ab70128b04.zip mtk-20170518-e532fa5fd42501e468051addfac454ab70128b04.tar.gz mtk-20170518-e532fa5fd42501e468051addfac454ab70128b04.tar.bz2 | |
ramips: add preliminary support for the RT3662/RT3883 SoCs
SVN-Revision: 30495
Diffstat (limited to 'target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c')
| -rw-r--r-- | target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c b/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c new file mode 100644 index 0000000..b561fd3 --- /dev/null +++ b/target/linux/ramips/files/arch/mips/ralink/rt3883/irq.c @@ -0,0 +1,84 @@ +/* + * 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; +} |