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/*
* arch/sh/boards/landisk/irq.c
*
* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
* Based largely on io_se.c.
*
* I/O routine for I-O Data Device, Inc. LANDISK.
*
* Initial version only to support LAN access; some
* placeholder code from io_landisk.c left in with the
* expectation of later SuperIO and PCMCIA access.
*/
/*
* modified by kogiidena
* 2005.03.03
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/landisk/iodata_landisk.h>
static void enable_landisk_irq(unsigned int irq);
static void disable_landisk_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_landisk_irq disable_landisk_irq
static void ack_landisk_irq(unsigned int irq);
static void end_landisk_irq(unsigned int irq);
static unsigned int startup_landisk_irq(unsigned int irq)
{
enable_landisk_irq(irq);
return 0; /* never anything pending */
}
static void disable_landisk_irq(unsigned int irq)
{
unsigned char val;
unsigned char mask = 0xff ^ (0x01 << (irq - 5));
/* Set the priority in IPR to 0 */
val = ctrl_inb(PA_IMASK);
val &= mask;
ctrl_outb(val, PA_IMASK);
}
static void enable_landisk_irq(unsigned int irq)
{
unsigned char val;
unsigned char value = (0x01 << (irq - 5));
/* Set priority in IPR back to original value */
val = ctrl_inb(PA_IMASK);
val |= value;
ctrl_outb(val, PA_IMASK);
}
static void ack_landisk_irq(unsigned int irq)
{
disable_landisk_irq(irq);
}
static void end_landisk_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
enable_landisk_irq(irq);
}
static struct hw_interrupt_type landisk_irq_type = {
.typename = "LANDISK IRQ",
.startup = startup_landisk_irq,
.shutdown = shutdown_landisk_irq,
.enable = enable_landisk_irq,
.disable = disable_landisk_irq,
.ack = ack_landisk_irq,
.end = end_landisk_irq
};
static void make_landisk_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].chip = &landisk_irq_type;
disable_landisk_irq(irq);
}
/*
* Initialize IRQ setting
*/
void __init init_landisk_IRQ(void)
{
int i;
for (i = 5; i < 14; i++)
make_landisk_irq(i);
}
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