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author | Hans J. Koch <hjk@linutronix.de> | 2010-09-17 20:16:29 +0400 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2010-09-17 23:55:08 +0400 |
commit | e9268ef2252c2dfc7e2d0c435826768bb0e549ea (patch) | |
tree | 1ffaa9f802efc5a45634787e386477f840d2c2b1 /arch/arm/mach-tcc8k/irq.c | |
parent | da15797eaec795bc2a1a9adb441214a6f5ea07fc (diff) | |
download | linux-e9268ef2252c2dfc7e2d0c435826768bb0e549ea.tar.xz |
ARM: Introduce plat-tcc irq framework
Introduce lowlevel interrupt routines.
Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/arm/mach-tcc8k/irq.c')
-rw-r--r-- | arch/arm/mach-tcc8k/irq.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/arm/mach-tcc8k/irq.c b/arch/arm/mach-tcc8k/irq.c new file mode 100644 index 000000000000..34575c4963f0 --- /dev/null +++ b/arch/arm/mach-tcc8k/irq.c @@ -0,0 +1,111 @@ +/* + * Copyright (C) Telechips, Inc. + * Copyright (C) 2009-2010 Hans J. Koch <hjk@linutronix.de> + * + * Licensed under the terms of the GNU GPL version 2. + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> + +#include <asm/irq.h> +#include <asm/mach/irq.h> + +#include <mach/tcc8k-regs.h> +#include <mach/irqs.h> + +#include "common.h" + +/* Disable IRQ */ +static void tcc8000_mask_ack_irq0(unsigned int irq) +{ + PIC0_IEN &= ~(1 << irq); + PIC0_CREQ |= (1 << irq); +} + +static void tcc8000_mask_ack_irq1(unsigned int irq) +{ + PIC1_IEN &= ~(1 << (irq - 32)); + PIC1_CREQ |= (1 << (irq - 32)); +} + +static void tcc8000_mask_irq0(unsigned int irq) +{ + PIC0_IEN &= ~(1 << irq); +} + +static void tcc8000_mask_irq1(unsigned int irq) +{ + PIC1_IEN &= ~(1 << (irq - 32)); +} + +static void tcc8000_ack_irq0(unsigned int irq) +{ + PIC0_CREQ |= (1 << irq); +} + +static void tcc8000_ack_irq1(unsigned int irq) +{ + PIC1_CREQ |= (1 << (irq - 32)); +} + +/* Enable IRQ */ +static void tcc8000_unmask_irq0(unsigned int irq) +{ + PIC0_IEN |= (1 << irq); + PIC0_INTOEN |= (1 << irq); +} + +static void tcc8000_unmask_irq1(unsigned int irq) +{ + PIC1_IEN |= (1 << (irq - 32)); + PIC1_INTOEN |= (1 << (irq - 32)); +} + +static struct irq_chip tcc8000_irq_chip0 = { + .name = "tcc_irq0", + .mask = tcc8000_mask_irq0, + .ack = tcc8000_ack_irq0, + .mask_ack = tcc8000_mask_ack_irq0, + .unmask = tcc8000_unmask_irq0, +}; + +static struct irq_chip tcc8000_irq_chip1 = { + .name = "tcc_irq1", + .mask = tcc8000_mask_irq1, + .ack = tcc8000_ack_irq1, + .mask_ack = tcc8000_mask_ack_irq1, + .unmask = tcc8000_unmask_irq1, +}; + +void __init tcc8k_init_irq(void) +{ + int irqno; + + /* Mask and clear all interrupts */ + PIC0_IEN = 0x00000000; + PIC0_CREQ = 0xffffffff; + PIC1_IEN = 0x00000000; + PIC1_CREQ = 0xffffffff; + + PIC0_MEN0 = 0x00000003; + PIC1_MEN1 = 0x00000003; + PIC1_MEN = 0x00000003; + + /* let all IRQs be level triggered */ + PIC0_TMODE = 0xffffffff; + PIC1_TMODE = 0xffffffff; + /* all IRQs are IRQs (not FIQs) */ + PIC0_IRQSEL = 0xffffffff; + PIC1_IRQSEL = 0xffffffff; + + for (irqno = 0; irqno < NR_IRQS; irqno++) { + if (irqno < 32) + set_irq_chip(irqno, &tcc8000_irq_chip0); + else + set_irq_chip(irqno, &tcc8000_irq_chip1); + set_irq_handler(irqno, handle_level_irq); + set_irq_flags(irqno, IRQF_VALID); + } +} |