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/*
* linux/include/asm-arm/arch-rpc/irq.h
*
* Copyright (C) 1996 Russell King
*
* 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.
*
* Changelog:
* 10-10-1996 RMK Brought up to date with arch-sa110eval
* 22-08-1998 RMK Restructured IRQ routines
*/
#include <asm/hardware/iomd.h>
#include <asm/io.h>
#define fixup_irq(x) (x)
static void rpc_mask_irq_ack_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
val = iomd_readb(IOMD_IRQMASKA);
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
iomd_writeb(mask, IOMD_IRQCLRA);
}
static void rpc_mask_irq_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
val = iomd_readb(IOMD_IRQMASKA);
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
}
static void rpc_unmask_irq_a(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << irq;
val = iomd_readb(IOMD_IRQMASKA);
iomd_writeb(val | mask, IOMD_IRQMASKA);
}
static void rpc_mask_irq_b(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_IRQMASKB);
iomd_writeb(val & ~mask, IOMD_IRQMASKB);
}
static void rpc_unmask_irq_b(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_IRQMASKB);
iomd_writeb(val | mask, IOMD_IRQMASKB);
}
static void rpc_mask_irq_dma(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_DMAMASK);
iomd_writeb(val & ~mask, IOMD_DMAMASK);
}
static void rpc_unmask_irq_dma(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_DMAMASK);
iomd_writeb(val | mask, IOMD_DMAMASK);
}
static void rpc_mask_irq_fiq(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_FIQMASK);
iomd_writeb(val & ~mask, IOMD_FIQMASK);
}
static void rpc_unmask_irq_fiq(unsigned int irq)
{
unsigned int val, mask;
mask = 1 << (irq & 7);
val = iomd_readb(IOMD_FIQMASK);
iomd_writeb(val | mask, IOMD_FIQMASK);
}
static __inline__ void irq_init_irq(void)
{
int irq;
iomd_writeb(0, IOMD_IRQMASKA);
iomd_writeb(0, IOMD_IRQMASKB);
iomd_writeb(0, IOMD_FIQMASK);
iomd_writeb(0, IOMD_DMAMASK);
for (irq = 0; irq < NR_IRQS; irq++) {
switch (irq) {
case 0 ... 6:
irq_desc[irq].probe_ok = 1;
case 7:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = rpc_mask_irq_ack_a;
irq_desc[irq].mask = rpc_mask_irq_a;
irq_desc[irq].unmask = rpc_unmask_irq_a;
break;
case 9 ... 15:
irq_desc[irq].probe_ok = 1;
case 8:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = rpc_mask_irq_b;
irq_desc[irq].mask = rpc_mask_irq_b;
irq_desc[irq].unmask = rpc_unmask_irq_b;
break;
case 16 ... 19:
case 21:
irq_desc[irq].noautoenable = 1;
case 20:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = rpc_mask_irq_dma;
irq_desc[irq].mask = rpc_mask_irq_dma;
irq_desc[irq].unmask = rpc_unmask_irq_dma;
break;
case 64 ... 71:
irq_desc[irq].valid = 1;
irq_desc[irq].mask_ack = rpc_mask_irq_fiq;
irq_desc[irq].mask = rpc_mask_irq_fiq;
irq_desc[irq].unmask = rpc_unmask_irq_fiq;
break;
}
}
irq_desc[IRQ_KEYBOARDTX].noautoenable = 1;
init_FIQ();
}
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