You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
3.0 KiB
108 lines
3.0 KiB
/* 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);
|
|
}
|
|
|