e9268ef225
Introduce lowlevel interrupt routines. Signed-off-by: "Hans J. Koch" <hjk@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
111 lines
2.2 KiB
C
111 lines
2.2 KiB
C
/*
|
|
* 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);
|
|
}
|
|
}
|