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/*
* linux/arch/sh/boards/renesas/hs7751rvoip/irq.c
*
* Copyright (C) 2000 Kazumoto Kojima
*
* Renesas Technology Sales HS7751RVoIP Support.
*
* Modified for HS7751RVoIP by
* Atom Create Engineering Co., Ltd. 2002.
* Lineo uSolutions, Inc. 2003.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hs7751rvoip/hs7751rvoip.h>
static int mask_pos[] = {8, 9, 10, 11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7};
static void enable_hs7751rvoip_irq(unsigned int irq);
static void disable_hs7751rvoip_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_hs7751rvoip_irq disable_hs7751rvoip_irq
static void ack_hs7751rvoip_irq(unsigned int irq);
static void end_hs7751rvoip_irq(unsigned int irq);
static unsigned int startup_hs7751rvoip_irq(unsigned int irq)
{
enable_hs7751rvoip_irq(irq);
return 0; /* never anything pending */
}
static void disable_hs7751rvoip_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(IRLCNTR3);
val &= mask;
ctrl_outw(val, IRLCNTR3);
local_irq_restore(flags);
}
static void enable_hs7751rvoip_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(IRLCNTR3);
val |= value;
ctrl_outw(val, IRLCNTR3);
local_irq_restore(flags);
}
static void ack_hs7751rvoip_irq(unsigned int irq)
{
disable_hs7751rvoip_irq(irq);
}
static void end_hs7751rvoip_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_hs7751rvoip_irq(irq);
}
static struct hw_interrupt_type hs7751rvoip_irq_type = {
.typename = "HS7751RVoIP IRQ",
.startup = startup_hs7751rvoip_irq,
.shutdown = shutdown_hs7751rvoip_irq,
.enable = enable_hs7751rvoip_irq,
.disable = disable_hs7751rvoip_irq,
.ack = ack_hs7751rvoip_irq,
.end = end_hs7751rvoip_irq,
};
static void make_hs7751rvoip_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].handler = &hs7751rvoip_irq_type;
disable_hs7751rvoip_irq(irq);
}
/*
* Initialize IRQ setting
*/
void __init init_hs7751rvoip_IRQ(void)
{
int i;
/* IRL0=ON HOOK1
* IRL1=OFF HOOK1
* IRL2=ON HOOK2
* IRL3=OFF HOOK2
* IRL4=Ringing Detection
* IRL5=CODEC
* IRL6=Ethernet
* IRL7=Ethernet Hub
* IRL8=USB Communication
* IRL9=USB Connection
* IRL10=USB DMA
* IRL11=CF Card
* IRL12=PCMCIA
* IRL13=PCI Slot
*/
ctrl_outw(0x9876, IRLCNTR1);
ctrl_outw(0xdcba, IRLCNTR2);
ctrl_outw(0x0050, IRLCNTR4);
ctrl_outw(0x4321, IRLCNTR5);
for (i=0; i<14; i++)
make_hs7751rvoip_irq(i);
}
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