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/*
* linux/arch/sh/boards/renesas/r7780rp/irq.c
*
* Copyright (C) 2000 Kazumoto Kojima
*
* Renesas Solutions Highlander R7780RP-1 Support.
*
* Modified for R7780RP-1 by
* Atom Create Engineering Co., Ltd. 2002.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/r7780rp/r7780rp.h>
#ifdef CONFIG_SH_R7780MP
static int mask_pos[] = {12, 11, 9, 14, 15, 8, 13, 6, 5, 4, 3, 2, 0, 0, 1, 0};
#else
static int mask_pos[] = {15, 14, 13, 12, 11, 10, 9, 8, 7, 5, 6, 4, 0, 1, 2, 0};
#endif
static void enable_r7780rp_irq(unsigned int irq);
static void disable_r7780rp_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_r7780rp_irq disable_r7780rp_irq
static void ack_r7780rp_irq(unsigned int irq);
static void end_r7780rp_irq(unsigned int irq);
static unsigned int startup_r7780rp_irq(unsigned int irq)
{
enable_r7780rp_irq(irq);
return 0; /* never anything pending */
}
static void disable_r7780rp_irq(unsigned int irq)
{
unsigned long flags;
unsigned short val;
unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
/* Set the priority in IPR to 0 */
local_irq_save(flags);
val = ctrl_inw(IRLCNTR1);
val &= mask;
ctrl_outw(val, IRLCNTR1);
local_irq_restore(flags);
}
static void enable_r7780rp_irq(unsigned int irq)
{
unsigned long flags;
unsigned short val;
unsigned short value = (0x0001 << mask_pos[irq]);
/* Set priority in IPR back to original value */
local_irq_save(flags);
val = ctrl_inw(IRLCNTR1);
val |= value;
ctrl_outw(val, IRLCNTR1);
local_irq_restore(flags);
}
static void ack_r7780rp_irq(unsigned int irq)
{
disable_r7780rp_irq(irq);
}
static void end_r7780rp_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_r7780rp_irq(irq);
}
static struct hw_interrupt_type r7780rp_irq_type = {
.typename = "R7780RP-IRQ",
.startup = startup_r7780rp_irq,
.shutdown = shutdown_r7780rp_irq,
.enable = enable_r7780rp_irq,
.disable = disable_r7780rp_irq,
.ack = ack_r7780rp_irq,
.end = end_r7780rp_irq,
};
static void make_r7780rp_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].handler = &r7780rp_irq_type;
disable_r7780rp_irq(irq);
}
/*
* Initialize IRQ setting
*/
void __init init_r7780rp_IRQ(void)
{
int i;
/* IRL0=PCI Slot #A
* IRL1=PCI Slot #B
* IRL2=PCI Slot #C
* IRL3=PCI Slot #D
* IRL4=CF Card
* IRL5=CF Card Insert
* IRL6=M66596
* IRL7=SD Card
* IRL8=Touch Panel
* IRL9=SCI
* IRL10=Serial
* IRL11=Extention #A
* IRL11=Extention #B
* IRL12=Debug LAN
* IRL13=Push Switch
* IRL14=ZiggBee IO
*/
for (i=0; i<15; i++)
make_r7780rp_irq(i);
}
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