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.
128 lines
3.0 KiB
128 lines
3.0 KiB
/* $Id: irq.c,v 1.1.2.4 2002/11/04 20:33:56 lethal Exp $
|
|
*
|
|
* arch/sh/boards/cqreek/irq.c
|
|
*
|
|
* Copyright (C) 2000 Niibe Yutaka
|
|
*
|
|
* CqREEK IDE/ISA Bridge Support.
|
|
*
|
|
*/
|
|
|
|
#include <linux/irq.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/cqreek/cqreek.h>
|
|
#include <asm/io.h>
|
|
#include <asm/io_generic.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/machvec.h>
|
|
#include <asm/machvec_init.h>
|
|
#include <asm/rtc.h>
|
|
|
|
struct cqreek_irq_data {
|
|
unsigned short mask_port; /* Port of Interrupt Mask Register */
|
|
unsigned short stat_port; /* Port of Interrupt Status Register */
|
|
unsigned short bit; /* Value of the bit */
|
|
};
|
|
static struct cqreek_irq_data cqreek_irq_data[NR_IRQS];
|
|
|
|
static void disable_cqreek_irq(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
unsigned short mask;
|
|
unsigned short mask_port = cqreek_irq_data[irq].mask_port;
|
|
unsigned short bit = cqreek_irq_data[irq].bit;
|
|
|
|
local_irq_save(flags);
|
|
/* Disable IRQ */
|
|
mask = inw(mask_port) & ~bit;
|
|
outw_p(mask, mask_port);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void enable_cqreek_irq(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
unsigned short mask;
|
|
unsigned short mask_port = cqreek_irq_data[irq].mask_port;
|
|
unsigned short bit = cqreek_irq_data[irq].bit;
|
|
|
|
local_irq_save(flags);
|
|
/* Enable IRQ */
|
|
mask = inw(mask_port) | bit;
|
|
outw_p(mask, mask_port);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void mask_and_ack_cqreek(unsigned int irq)
|
|
{
|
|
unsigned short stat_port = cqreek_irq_data[irq].stat_port;
|
|
unsigned short bit = cqreek_irq_data[irq].bit;
|
|
|
|
disable_cqreek_irq(irq);
|
|
/* Clear IRQ (it might be edge IRQ) */
|
|
inw(stat_port);
|
|
outw_p(bit, stat_port);
|
|
}
|
|
|
|
static void end_cqreek_irq(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
|
enable_cqreek_irq(irq);
|
|
}
|
|
|
|
static unsigned int startup_cqreek_irq(unsigned int irq)
|
|
{
|
|
enable_cqreek_irq(irq);
|
|
return 0;
|
|
}
|
|
|
|
static void shutdown_cqreek_irq(unsigned int irq)
|
|
{
|
|
disable_cqreek_irq(irq);
|
|
}
|
|
|
|
static struct hw_interrupt_type cqreek_irq_type = {
|
|
"CqREEK-IRQ",
|
|
startup_cqreek_irq,
|
|
shutdown_cqreek_irq,
|
|
enable_cqreek_irq,
|
|
disable_cqreek_irq,
|
|
mask_and_ack_cqreek,
|
|
end_cqreek_irq
|
|
};
|
|
|
|
int cqreek_has_ide, cqreek_has_isa;
|
|
|
|
/* XXX: This is just for test for my NE2000 ISA board
|
|
What we really need is virtualized IRQ and demultiplexer like HP600 port */
|
|
void __init init_cqreek_IRQ(void)
|
|
{
|
|
if (cqreek_has_ide) {
|
|
cqreek_irq_data[14].mask_port = BRIDGE_IDE_INTR_MASK;
|
|
cqreek_irq_data[14].stat_port = BRIDGE_IDE_INTR_STAT;
|
|
cqreek_irq_data[14].bit = 1;
|
|
|
|
irq_desc[14].handler = &cqreek_irq_type;
|
|
irq_desc[14].status = IRQ_DISABLED;
|
|
irq_desc[14].action = 0;
|
|
irq_desc[14].depth = 1;
|
|
|
|
disable_cqreek_irq(14);
|
|
}
|
|
|
|
if (cqreek_has_isa) {
|
|
cqreek_irq_data[10].mask_port = BRIDGE_ISA_INTR_MASK;
|
|
cqreek_irq_data[10].stat_port = BRIDGE_ISA_INTR_STAT;
|
|
cqreek_irq_data[10].bit = (1 << 10);
|
|
|
|
/* XXX: Err... we may need demultiplexer for ISA irq... */
|
|
irq_desc[10].handler = &cqreek_irq_type;
|
|
irq_desc[10].status = IRQ_DISABLED;
|
|
irq_desc[10].action = 0;
|
|
irq_desc[10].depth = 1;
|
|
|
|
disable_cqreek_irq(10);
|
|
}
|
|
}
|
|
|
|
|