mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
7ec80ddf04
Add Nuvoton W90X900 ARM9 plat support to linux arm tree, Now, this patch include only W90P910 EVB of W90P910 CPU, Its driver is nothing. Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
77 lines
1.7 KiB
C
77 lines
1.7 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#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>
|
|
|
|
static void w90x900_irq_mask(unsigned int irq)
|
|
{
|
|
__raw_writel(1 << irq, REG_AIC_MDCR);
|
|
}
|
|
|
|
/*
|
|
* By the w90p910 spec,any irq,only write 1
|
|
* to REG_AIC_EOSCR for ACK
|
|
*/
|
|
|
|
static void w90x900_irq_ack(unsigned int irq)
|
|
{
|
|
__raw_writel(0x01, REG_AIC_EOSCR);
|
|
}
|
|
|
|
static void w90x900_irq_unmask(unsigned int irq)
|
|
{
|
|
unsigned long mask;
|
|
|
|
if (irq == IRQ_T_INT_GROUP) {
|
|
mask = __raw_readl(REG_AIC_GEN);
|
|
__raw_writel(TIME_GROUP_IRQ | mask, REG_AIC_GEN);
|
|
__raw_writel(1 << IRQ_T_INT_GROUP, REG_AIC_MECR);
|
|
}
|
|
__raw_writel(1 << irq, REG_AIC_MECR);
|
|
}
|
|
|
|
static struct irq_chip w90x900_irq_chip = {
|
|
.ack = w90x900_irq_ack,
|
|
.mask = w90x900_irq_mask,
|
|
.unmask = w90x900_irq_unmask,
|
|
};
|
|
|
|
void __init w90x900_init_irq(void)
|
|
{
|
|
int irqno;
|
|
|
|
__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
|
|
|
|
for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) {
|
|
set_irq_chip(irqno, &w90x900_irq_chip);
|
|
set_irq_handler(irqno, handle_level_irq);
|
|
set_irq_flags(irqno, IRQF_VALID);
|
|
}
|
|
}
|