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/* irq-mb93493.c: MB93493 companion chip interrupt handler
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/delay.h>
#include <asm/irq.h>
#include <asm/irc-regs.h>
#include <asm/irq-routing.h>
#include <asm/mb93493-irqs.h>
static void frv_mb93493_doirq(struct irq_source *source);
/*****************************************************************************/
/*
* MB93493 companion chip IRQ multiplexor
*/
static struct irq_source frv_mb93493[2] = {
[0] = {
.muxname = "mb93493.0",
.muxdata = __region_CS3 + 0x3d0,
.doirq = frv_mb93493_doirq,
.irqmask = 0x0000,
},
[1] = {
.muxname = "mb93493.1",
.muxdata = __region_CS3 + 0x3d4,
.doirq = frv_mb93493_doirq,
.irqmask = 0x0000,
},
};
static void frv_mb93493_control(struct irq_group *group, int index, int on)
{
struct irq_source *source;
uint32_t iqsr;
if ((frv_mb93493[0].irqmask & (1 << index)))
source = &frv_mb93493[0];
else
source = &frv_mb93493[1];
iqsr = readl(source->muxdata);
if (on)
iqsr |= 1 << (index + 16);
else
iqsr &= ~(1 << (index + 16));
writel(iqsr, source->muxdata);
}
static struct irq_group frv_mb93493_irqs = {
.first_irq = IRQ_BASE_MB93493,
.control = frv_mb93493_control,
};
static void frv_mb93493_doirq(struct irq_source *source)
{
uint32_t mask = readl(source->muxdata);
mask = mask & (mask >> 16) & 0xffff;
if (mask)
distribute_irqs(&frv_mb93493_irqs, mask);
}
static void __init mb93493_irq_route(int irq, int source)
{
frv_mb93493[source].irqmask |= 1 << (irq - IRQ_BASE_MB93493);
frv_mb93493_irqs.sources[irq - IRQ_BASE_MB93493] = &frv_mb93493[source];
}
void __init route_mb93493_irqs(void)
{
frv_irq_route_external(&frv_mb93493[0], IRQ_CPU_MB93493_0);
frv_irq_route_external(&frv_mb93493[1], IRQ_CPU_MB93493_1);
frv_irq_set_group(&frv_mb93493_irqs);
mb93493_irq_route(IRQ_MB93493_VDC, IRQ_MB93493_VDC_ROUTE);
mb93493_irq_route(IRQ_MB93493_VCC, IRQ_MB93493_VCC_ROUTE);
mb93493_irq_route(IRQ_MB93493_AUDIO_IN, IRQ_MB93493_AUDIO_IN_ROUTE);
mb93493_irq_route(IRQ_MB93493_I2C_0, IRQ_MB93493_I2C_0_ROUTE);
mb93493_irq_route(IRQ_MB93493_I2C_1, IRQ_MB93493_I2C_1_ROUTE);
mb93493_irq_route(IRQ_MB93493_USB, IRQ_MB93493_USB_ROUTE);
mb93493_irq_route(IRQ_MB93493_LOCAL_BUS, IRQ_MB93493_LOCAL_BUS_ROUTE);
mb93493_irq_route(IRQ_MB93493_PCMCIA, IRQ_MB93493_PCMCIA_ROUTE);
mb93493_irq_route(IRQ_MB93493_GPIO, IRQ_MB93493_GPIO_ROUTE);
mb93493_irq_route(IRQ_MB93493_AUDIO_OUT, IRQ_MB93493_AUDIO_OUT_ROUTE);
}
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