linux/arch/arm/mach-w90x900/irq.c
wanzongshun 35c9221acb ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform
Add the cpu.c and dev.c and modify w90p910 platform
to apply to use the common API(provided by cpu.c and dev.c)
at the same time, I renamed all w90x900 to nuc900 in every
c file of w90x900 platform and touchscreen's driver name.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-09-02 11:22:23 +01:00

215 lines
4.0 KiB
C

/*
* linux/arch/arm/mach-w90x900/irq.c
*
* based on linux/arch/arm/plat-s3c24xx/irq.c by Ben Dooks
*
* Copyright (c) 2008 Nuvoton technology corporation
* All rights reserved.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/ptrace.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/hardware.h>
#include <mach/regs-irq.h>
struct group_irq {
unsigned long gpen;
unsigned int enabled;
void (*enable)(struct group_irq *, int enable);
};
static DEFINE_SPINLOCK(groupirq_lock);
#define DEFINE_GROUP(_name, _ctrlbit, _num) \
struct group_irq group_##_name = { \
.enable = nuc900_group_enable, \
.gpen = ((1 << _num) - 1) << _ctrlbit, \
}
static void nuc900_group_enable(struct group_irq *gpirq, int enable);
static DEFINE_GROUP(nirq0, 0, 4);
static DEFINE_GROUP(nirq1, 4, 4);
static DEFINE_GROUP(usbh, 8, 2);
static DEFINE_GROUP(ottimer, 16, 3);
static DEFINE_GROUP(gdma, 20, 2);
static DEFINE_GROUP(sc, 24, 2);
static DEFINE_GROUP(i2c, 26, 2);
static DEFINE_GROUP(ps2, 28, 2);
static int group_irq_enable(struct group_irq *group_irq)
{
unsigned long flags;
spin_lock_irqsave(&groupirq_lock, flags);
if (group_irq->enabled++ == 0)
(group_irq->enable)(group_irq, 1);
spin_unlock_irqrestore(&groupirq_lock, flags);
return 0;
}
static void group_irq_disable(struct group_irq *group_irq)
{
unsigned long flags;
WARN_ON(group_irq->enabled == 0);
spin_lock_irqsave(&groupirq_lock, flags);
if (--group_irq->enabled == 0)
(group_irq->enable)(group_irq, 0);
spin_unlock_irqrestore(&groupirq_lock, flags);
}
static void nuc900_group_enable(struct group_irq *gpirq, int enable)
{
unsigned int groupen = gpirq->gpen;
unsigned long regval;
regval = __raw_readl(REG_AIC_GEN);
if (enable)
regval |= groupen;
else
regval &= ~groupen;
__raw_writel(regval, REG_AIC_GEN);
}
static void nuc900_irq_mask(unsigned int irq)
{
struct group_irq *group_irq;
group_irq = NULL;
__raw_writel(1 << irq, REG_AIC_MDCR);
switch (irq) {
case IRQ_GROUP0:
group_irq = &group_nirq0;
break;
case IRQ_GROUP1:
group_irq = &group_nirq1;
break;
case IRQ_USBH:
group_irq = &group_usbh;
break;
case IRQ_T_INT_GROUP:
group_irq = &group_ottimer;
break;
case IRQ_GDMAGROUP:
group_irq = &group_gdma;
break;
case IRQ_SCGROUP:
group_irq = &group_sc;
break;
case IRQ_I2CGROUP:
group_irq = &group_i2c;
break;
case IRQ_P2SGROUP:
group_irq = &group_ps2;
break;
}
if (group_irq)
group_irq_disable(group_irq);
}
/*
* By the w90p910 spec,any irq,only write 1
* to REG_AIC_EOSCR for ACK
*/
static void nuc900_irq_ack(unsigned int irq)
{
__raw_writel(0x01, REG_AIC_EOSCR);
}
static void nuc900_irq_unmask(unsigned int irq)
{
struct group_irq *group_irq;
group_irq = NULL;
__raw_writel(1 << irq, REG_AIC_MECR);
switch (irq) {
case IRQ_GROUP0:
group_irq = &group_nirq0;
break;
case IRQ_GROUP1:
group_irq = &group_nirq1;
break;
case IRQ_USBH:
group_irq = &group_usbh;
break;
case IRQ_T_INT_GROUP:
group_irq = &group_ottimer;
break;
case IRQ_GDMAGROUP:
group_irq = &group_gdma;
break;
case IRQ_SCGROUP:
group_irq = &group_sc;
break;
case IRQ_I2CGROUP:
group_irq = &group_i2c;
break;
case IRQ_P2SGROUP:
group_irq = &group_ps2;
break;
}
if (group_irq)
group_irq_enable(group_irq);
}
static struct irq_chip nuc900_irq_chip = {
.ack = nuc900_irq_ack,
.mask = nuc900_irq_mask,
.unmask = nuc900_irq_unmask,
};
void __init nuc900_init_irq(void)
{
int irqno;
__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) {
set_irq_chip(irqno, &nuc900_irq_chip);
set_irq_handler(irqno, handle_level_irq);
set_irq_flags(irqno, IRQF_VALID);
}
}