android_kernel_motorola_sm6225/arch/arm/mach-s3c2410/s3c244x-irq.c
Ben Dooks 1e582fc737 [ARM] 3801/1: S3C24XX: Move IRQ PM out of pm.c
Seperate the IRQ power management code out of
the pm.c file, and add it to the relevant
system class devices.

Also make the suspend and resume code take
notice of the fact these registers can be
moved by compile time code.

Add fix from Ilya Yanok to also save the
INTSUBMSK over sleep.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-25 10:25:20 +01:00

147 lines
3.5 KiB
C

/* linux/arch/arm/mach-s3c2410/s3c2440-irq.c
*
* Copyright (c) 2003,2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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 <asm/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/mach/irq.h>
#include <asm/arch/regs-irq.h>
#include <asm/arch/regs-gpio.h>
#include "cpu.h"
#include "pm.h"
#include "irq.h"
/* camera irq */
static void s3c_irq_demux_cam(unsigned int irq,
struct irqdesc *desc,
struct pt_regs *regs)
{
unsigned int subsrc, submsk;
struct irqdesc *mydesc;
/* read the current pending interrupts, and the mask
* for what it is available */
subsrc = __raw_readl(S3C2410_SUBSRCPND);
submsk = __raw_readl(S3C2410_INTSUBMSK);
subsrc &= ~submsk;
subsrc >>= 11;
subsrc &= 3;
if (subsrc != 0) {
if (subsrc & 1) {
mydesc = irq_desc + IRQ_S3C2440_CAM_C;
desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc, regs);
}
if (subsrc & 2) {
mydesc = irq_desc + IRQ_S3C2440_CAM_P;
desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc, regs);
}
}
}
#define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
static void
s3c_irq_cam_mask(unsigned int irqno)
{
s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
}
static void
s3c_irq_cam_unmask(unsigned int irqno)
{
s3c_irqsub_unmask(irqno, INTMSK_CAM);
}
static void
s3c_irq_cam_ack(unsigned int irqno)
{
s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
}
static struct irqchip s3c_irq_cam = {
.mask = s3c_irq_cam_mask,
.unmask = s3c_irq_cam_unmask,
.ack = s3c_irq_cam_ack,
};
static int s3c244x_irq_add(struct sys_device *sysdev)
{
unsigned int irqno;
set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
set_irq_handler(IRQ_NFCON, do_level_IRQ);
set_irq_flags(IRQ_NFCON, IRQF_VALID);
/* add chained handler for camera */
set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
set_irq_handler(IRQ_CAM, do_level_IRQ);
set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
set_irq_chip(irqno, &s3c_irq_cam);
set_irq_handler(irqno, do_level_IRQ);
set_irq_flags(irqno, IRQF_VALID);
}
return 0;
}
static struct sysdev_driver s3c2440_irq_driver = {
.add = s3c244x_irq_add,
.suspend = s3c24xx_irq_suspend,
.resume = s3c24xx_irq_resume,
};
static int s3c2440_irq_init(void)
{
return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
}
arch_initcall(s3c2440_irq_init);
static struct sysdev_driver s3c2442_irq_driver = {
.add = s3c244x_irq_add,
.suspend = s3c24xx_irq_suspend,
.resume = s3c24xx_irq_resume,
};
static int s3c2442_irq_init(void)
{
return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
}
arch_initcall(s3c2442_irq_init);