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/*
* linux/arch/sh/boards/renesas/rts7751r2d/irq.c
*
* Copyright (C) 2000 Kazumoto Kojima
*
* Renesas Technology Sales RTS7751R2D Support.
*
* Modified for RTS7751R2D by
* Atom Create Engineering Co., Ltd. 2002.
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/rts7751r2d/rts7751r2d.h>
#if defined(CONFIG_RTS7751R2D_REV11)
static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
#else
static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
#endif
extern int voyagergx_irq_demux(int irq);
extern void setup_voyagergx_irq(void);
static void enable_rts7751r2d_irq(unsigned int irq);
static void disable_rts7751r2d_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_rts7751r2d_irq disable_rts7751r2d_irq
static void ack_rts7751r2d_irq(unsigned int irq);
static void end_rts7751r2d_irq(unsigned int irq);
static unsigned int startup_rts7751r2d_irq(unsigned int irq)
{
enable_rts7751r2d_irq(irq);
return 0; /* never anything pending */
}
static void disable_rts7751r2d_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_rts7751r2d_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);
}
int rts7751r2d_irq_demux(int irq)
{
int demux_irq;
demux_irq = voyagergx_irq_demux(irq);
return demux_irq;
}
static void ack_rts7751r2d_irq(unsigned int irq)
{
disable_rts7751r2d_irq(irq);
}
static void end_rts7751r2d_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_rts7751r2d_irq(irq);
}
static struct hw_interrupt_type rts7751r2d_irq_type = {
.typename = "RTS7751R2D IRQ",
.startup = startup_rts7751r2d_irq,
.shutdown = shutdown_rts7751r2d_irq,
.enable = enable_rts7751r2d_irq,
.disable = disable_rts7751r2d_irq,
.ack = ack_rts7751r2d_irq,
.end = end_rts7751r2d_irq,
};
static void make_rts7751r2d_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].chip = &rts7751r2d_irq_type;
disable_rts7751r2d_irq(irq);
}
/*
* Initialize IRQ setting
*/
void __init init_rts7751r2d_IRQ(void)
{
int i;
/* IRL0=KEY Input
* IRL1=Ethernet
* IRL2=CF Card
* IRL3=CF Card Insert
* IRL4=PCMCIA
* IRL5=VOYAGER
* IRL6=RTC Alarm
* IRL7=RTC Timer
* IRL8=SD Card
* IRL9=PCI Slot #1
* IRL10=PCI Slot #2
* IRL11=Extention #0
* IRL12=Extention #1
* IRL13=Extention #2
* IRL14=Extention #3
*/
for (i=0; i<15; i++)
make_rts7751r2d_irq(i);
setup_voyagergx_irq();
}
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