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