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/*
* linux/arch/sh/boards/se/7343/irq.c
*
* Copyright (C) 2008 Yoshihiro Shimoda
*
* Based on linux/arch/sh/boards/se/7722/irq.c
* Copyright (C) 2007 Nobuhiro Iwamatsu
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/se7343.h>
static void disable_se7343_irq(unsigned int irq)
{
unsigned int bit = irq - SE7343_FPGA_IRQ_BASE;
ctrl_outw(ctrl_inw(PA_CPLD_IMSK) | 1 << bit, PA_CPLD_IMSK);
}
static void enable_se7343_irq(unsigned int irq)
{
unsigned int bit = irq - SE7343_FPGA_IRQ_BASE;
ctrl_outw(ctrl_inw(PA_CPLD_IMSK) & ~(1 << bit), PA_CPLD_IMSK);
}
static struct irq_chip se7343_irq_chip __read_mostly = {
.name = "SE7343-FPGA",
.mask = disable_se7343_irq,
.unmask = enable_se7343_irq,
.mask_ack = disable_se7343_irq,
};
static void se7343_irq_demux(unsigned int irq, struct irq_desc *desc)
{
unsigned short intv = ctrl_inw(PA_CPLD_ST);
struct irq_desc *ext_desc;
unsigned int ext_irq = SE7343_FPGA_IRQ_BASE;
intv &= (1 << SE7343_FPGA_IRQ_NR) - 1;
while (intv) {
if (intv & 1) {
ext_desc = irq_desc + ext_irq;
handle_level_irq(ext_irq, ext_desc);
}
intv >>= 1;
ext_irq++;
}
}
/*
* Initialize IRQ setting
*/
void __init init_7343se_IRQ(void)
{
int i;
ctrl_outw(0, PA_CPLD_IMSK); /* disable all irqs */
ctrl_outw(0x2000, 0xb03fffec); /* mrshpc irq enable */
for (i = 0; i < SE7343_FPGA_IRQ_NR; i++)
set_irq_chip_and_handler_name(SE7343_FPGA_IRQ_BASE + i,
&se7343_irq_chip,
handle_level_irq, "level");
set_irq_chained_handler(IRQ0_IRQ, se7343_irq_demux);
set_irq_type(IRQ0_IRQ, IRQ_TYPE_LEVEL_LOW);
set_irq_chained_handler(IRQ1_IRQ, se7343_irq_demux);
set_irq_type(IRQ1_IRQ, IRQ_TYPE_LEVEL_LOW);
set_irq_chained_handler(IRQ4_IRQ, se7343_irq_demux);
set_irq_type(IRQ4_IRQ, IRQ_TYPE_LEVEL_LOW);
set_irq_chained_handler(IRQ5_IRQ, se7343_irq_demux);
set_irq_type(IRQ5_IRQ, IRQ_TYPE_LEVEL_LOW);
}
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