Commit 5060c888 authored by Olof Johansson's avatar Olof Johansson
Browse files

Merge branch 'next/irq-s3c24xx' of... 

Merge branch 'next/irq-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup

From Kukjin Kim:
This is redoing the s3c24xx irqs in a generic way by using a declarative
approach.

* 'next/irq-s3c24xx' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung

:
  ARM: S3C24XX: transform s3c2443 subirqs into new structure
  ARM: S3C24XX: modify s3c2443 irq init to initialize all irqs
  ARM: S3C24XX: move s3c2443 irq code to irq.c
  ARM: S3C24XX: transform s3c2416 irqs into new structure
  ARM: S3C24XX: modify s3c2416 irq init to initialize all irqs
  ARM: S3C24XX: move s3c2416 irq init to common irq code
  ARM: S3C24XX: Modify s3c_irq_wake to use the hwirq property
  ARM: S3C24XX: Move irq syscore-ops to irq-pm
  ARM: S3C24XX: transform irq handling into a declarative form

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents 7dcbeef7 f44ddba3

arch/arm/mach-s3c24xx/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ obj-$(CONFIG_S3C2412_DMA) += dma-s3c2412.o 
obj-$(CONFIG_S3C2412_PM)	+= pm-s3c2412.o

obj-$(CONFIG_S3C2412_PM_SLEEP)	+= sleep-s3c2412.o



obj-$(CONFIG_CPU_S3C2416)	+= s3c2416.o irq-s3c2416.o clock-s3c2416.o

obj-$(CONFIG_CPU_S3C2416)	+= s3c2416.o clock-s3c2416.o

obj-$(CONFIG_S3C2416_PM)	+= pm-s3c2416.o



obj-$(CONFIG_CPU_S3C2440)	+= s3c2440.o irq-s3c2440.o clock-s3c2440.o
@@ -39,7 +39,7 @@ obj-$(CONFIG_S3C2440_DMA) += dma-s3c2440.o 
obj-$(CONFIG_S3C2440_PLL_12000000) += pll-s3c2440-12000000.o

obj-$(CONFIG_S3C2440_PLL_16934400) += pll-s3c2440-16934400.o



obj-$(CONFIG_CPU_S3C2443)	+= s3c2443.o irq-s3c2443.o clock-s3c2443.o

obj-$(CONFIG_CPU_S3C2443)	+= s3c2443.o clock-s3c2443.o



# PM

arch/arm/mach-s3c24xx/common.h

+2 −0
Original line number Diff line number Diff line
@@ -15,4 +15,6 @@ 
void s3c2410_restart(char mode, const char *cmd);

void s3c244x_restart(char mode, const char *cmd);



extern struct syscore_ops s3c24xx_irq_syscore_ops;



#endif /* __ARCH_ARM_MACH_S3C24XX_COMMON_H */

arch/arm/mach-s3c24xx/irq-pm.c

+35 −6
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/module.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/syscore_ops.h>



#include <plat/cpu.h>

#include <plat/pm.h>
@@ -29,18 +30,18 @@ 
 * set bit to 1 in allow bitfield to enable the wakeup settings on it

*/



unsigned long s3c_irqwake_intallow	= 1L << (IRQ_RTC - IRQ_EINT0) | 0xfL;

unsigned long s3c_irqwake_intallow	= 1L << 30 | 0xfL;

unsigned long s3c_irqwake_eintallow	= 0x0000fff0L;



int s3c_irq_wake(struct irq_data *data, unsigned int state)

{

	unsigned long irqbit = 1 << (data->irq - IRQ_EINT0);

	unsigned long irqbit = 1 << data->hwirq;



	if (!(s3c_irqwake_intallow & irqbit))

		return -ENOENT;



	printk(KERN_INFO "wake %s for irq %d\n",

	       state ? "enabled" : "disabled", data->irq);

	pr_info("wake %s for hwirq %lu\n",

		state ? "enabled" : "disabled", data->hwirq);



	if (!state)

		s3c_irqwake_intmask |= irqbit;
@@ -64,7 +65,7 @@ static unsigned long save_extint[3]; 
static unsigned long save_eintflt[4];

static unsigned long save_eintmask;



int s3c24xx_irq_suspend(void)

static int s3c24xx_irq_suspend(void)

{

	unsigned int i;
@@ -80,7 +81,7 @@ int s3c24xx_irq_suspend(void) 
	return 0;

}



void s3c24xx_irq_resume(void)

static void s3c24xx_irq_resume(void)

{

	unsigned int i;
@@ -93,3 +94,31 @@ void s3c24xx_irq_resume(void) 
	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));

	__raw_writel(save_eintmask, S3C24XX_EINTMASK);

}



struct syscore_ops s3c24xx_irq_syscore_ops = {

	.suspend	= s3c24xx_irq_suspend,

	.resume		= s3c24xx_irq_resume,

};



#ifdef CONFIG_CPU_S3C2416

static struct sleep_save s3c2416_irq_save[] = {

	SAVE_ITEM(S3C2416_INTMSK2),

};



static int s3c2416_irq_suspend(void)

{

	s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));



	return 0;

}



static void s3c2416_irq_resume(void)

{

	s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));

}



struct syscore_ops s3c2416_irq_syscore_ops = {

	.suspend	= s3c2416_irq_suspend,

	.resume		= s3c2416_irq_resume,

};

#endif

arch/arm/mach-s3c24xx/irq-s3c2416.c

deleted100644 → 0
+0 −348
Original line number Diff line number Diff line 
/* linux/arch/arm/mach-s3c2416/irq.c

 *

 * Copyright (c) 2009 Yauhen Kharuzhy <jekhor@gmail.com>,

 *	as part of OpenInkpot project

 * Copyright (c) 2009 Promwad Innovation Company

 *	Yauhen Kharuzhy <yauhen.kharuzhy@promwad.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.

 *

 * 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/device.h>

#include <linux/io.h>

#include <linux/syscore_ops.h>



#include <mach/hardware.h>

#include <asm/irq.h>



#include <asm/mach/irq.h>



#include <mach/regs-irq.h>

#include <mach/regs-gpio.h>



#include <plat/cpu.h>

#include <plat/pm.h>

#include <plat/irq.h>



#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)



static inline void s3c2416_irq_demux(unsigned int irq, unsigned int len)

{

	unsigned int subsrc, submsk;

	unsigned int end;



	/* 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 >>= (irq - S3C2410_IRQSUB(0));

	subsrc  &= (1 << len)-1;



	end = len + irq;



	for (; irq < end && subsrc; irq++) {

		if (subsrc & 1)

			generic_handle_irq(irq);



		subsrc >>= 1;

	}

}



/* WDT/AC97 sub interrupts */



static void s3c2416_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)

{

	s3c2416_irq_demux(IRQ_S3C2443_WDT, 4);

}



#define INTMSK_WDTAC97	(1UL << (IRQ_WDT - IRQ_EINT0))

#define SUBMSK_WDTAC97	INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)



static void s3c2416_irq_wdtac97_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);

}



static void s3c2416_irq_wdtac97_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);

}



static void s3c2416_irq_wdtac97_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);

}



static struct irq_chip s3c2416_irq_wdtac97 = {

	.irq_mask	= s3c2416_irq_wdtac97_mask,

	.irq_unmask	= s3c2416_irq_wdtac97_unmask,

	.irq_ack	= s3c2416_irq_wdtac97_ack,

};



/* LCD sub interrupts */



static void s3c2416_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)

{

	s3c2416_irq_demux(IRQ_S3C2443_LCD1, 4);

}



#define INTMSK_LCD	(1UL << (IRQ_LCD - IRQ_EINT0))

#define SUBMSK_LCD	INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)



static void s3c2416_irq_lcd_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);

}



static void s3c2416_irq_lcd_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_LCD);

}



static void s3c2416_irq_lcd_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);

}



static struct irq_chip s3c2416_irq_lcd = {

	.irq_mask	= s3c2416_irq_lcd_mask,

	.irq_unmask	= s3c2416_irq_lcd_unmask,

	.irq_ack	= s3c2416_irq_lcd_ack,

};



/* DMA sub interrupts */



static void s3c2416_irq_demux_dma(unsigned int irq, struct irq_desc *desc)

{

	s3c2416_irq_demux(IRQ_S3C2443_DMA0, 6);

}



#define INTMSK_DMA	(1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))

#define SUBMSK_DMA	INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)





static void s3c2416_irq_dma_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);

}



static void s3c2416_irq_dma_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_DMA);

}



static void s3c2416_irq_dma_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);

}



static struct irq_chip s3c2416_irq_dma = {

	.irq_mask	= s3c2416_irq_dma_mask,

	.irq_unmask	= s3c2416_irq_dma_unmask,

	.irq_ack	= s3c2416_irq_dma_ack,

};



/* UART3 sub interrupts */



static void s3c2416_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)

{

	s3c2416_irq_demux(IRQ_S3C2443_RX3, 3);

}



#define INTMSK_UART3	(1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))

#define SUBMSK_UART3	(0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))



static void s3c2416_irq_uart3_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);

}



static void s3c2416_irq_uart3_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_UART3);

}



static void s3c2416_irq_uart3_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);

}



static struct irq_chip s3c2416_irq_uart3 = {

	.irq_mask	= s3c2416_irq_uart3_mask,

	.irq_unmask	= s3c2416_irq_uart3_unmask,

	.irq_ack	= s3c2416_irq_uart3_ack,

};



/* second interrupt register */



static inline void s3c2416_irq_ack_second(struct irq_data *data)

{

	unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);



	__raw_writel(bitval, S3C2416_SRCPND2);

	__raw_writel(bitval, S3C2416_INTPND2);

}



static void s3c2416_irq_mask_second(struct irq_data *data)

{

	unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);

	unsigned long mask;



	mask = __raw_readl(S3C2416_INTMSK2);

	mask |= bitval;

	__raw_writel(mask, S3C2416_INTMSK2);

}



static void s3c2416_irq_unmask_second(struct irq_data *data)

{

	unsigned long bitval = 1UL << (data->irq - IRQ_S3C2416_2D);

	unsigned long mask;



	mask = __raw_readl(S3C2416_INTMSK2);

	mask &= ~bitval;

	__raw_writel(mask, S3C2416_INTMSK2);

}



struct irq_chip s3c2416_irq_second = {

	.irq_ack	= s3c2416_irq_ack_second,

	.irq_mask	= s3c2416_irq_mask_second,

	.irq_unmask	= s3c2416_irq_unmask_second,

};





/* IRQ initialisation code */



static int s3c2416_add_sub(unsigned int base,

				   void (*demux)(unsigned int,

						 struct irq_desc *),

				   struct irq_chip *chip,

				   unsigned int start, unsigned int end)

{

	unsigned int irqno;



	irq_set_chip_and_handler(base, &s3c_irq_level_chip, handle_level_irq);

	irq_set_chained_handler(base, demux);



	for (irqno = start; irqno <= end; irqno++) {

		irq_set_chip_and_handler(irqno, chip, handle_level_irq);

		set_irq_flags(irqno, IRQF_VALID);

	}



	return 0;

}



static void s3c2416_irq_add_second(void)

{

	unsigned long pend;

	unsigned long last;

	int irqno;

	int i;



	/* first, clear all interrupts pending... */

	last = 0;

	for (i = 0; i < 4; i++) {

		pend = __raw_readl(S3C2416_INTPND2);



		if (pend == 0 || pend == last)

			break;



		__raw_writel(pend, S3C2416_SRCPND2);

		__raw_writel(pend, S3C2416_INTPND2);

		printk(KERN_INFO "irq: clearing pending status %08x\n",

		       (int)pend);

		last = pend;

	}



	for (irqno = IRQ_S3C2416_2D; irqno <= IRQ_S3C2416_I2S1; irqno++) {

		switch (irqno) {

		case IRQ_S3C2416_RESERVED2:

		case IRQ_S3C2416_RESERVED3:

			/* no IRQ here */

			break;

		default:

			irq_set_chip_and_handler(irqno, &s3c2416_irq_second,

						 handle_edge_irq);

			set_irq_flags(irqno, IRQF_VALID);

		}

	}

}



static int s3c2416_irq_add(struct device *dev,

				  struct subsys_interface *sif)

{

	printk(KERN_INFO "S3C2416: IRQ Support\n");



	s3c2416_add_sub(IRQ_LCD, s3c2416_irq_demux_lcd, &s3c2416_irq_lcd,

			IRQ_S3C2443_LCD2, IRQ_S3C2443_LCD4);



	s3c2416_add_sub(IRQ_S3C2443_DMA, s3c2416_irq_demux_dma,

			&s3c2416_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);



	s3c2416_add_sub(IRQ_S3C2443_UART3, s3c2416_irq_demux_uart3,

			&s3c2416_irq_uart3,

			IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);



	s3c2416_add_sub(IRQ_WDT, s3c2416_irq_demux_wdtac97,

			&s3c2416_irq_wdtac97,

			IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);



	s3c2416_irq_add_second();



	return 0;

}



static struct subsys_interface s3c2416_irq_interface = {

	.name		= "s3c2416_irq",

	.subsys		= &s3c2416_subsys,

	.add_dev	= s3c2416_irq_add,

};



static int __init s3c2416_irq_init(void)

{

	return subsys_interface_register(&s3c2416_irq_interface);

}



arch_initcall(s3c2416_irq_init);



#ifdef CONFIG_PM

static struct sleep_save irq_save[] = {

	SAVE_ITEM(S3C2416_INTMSK2),

};



int s3c2416_irq_suspend(void)

{

	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));



	return 0;

}



void s3c2416_irq_resume(void)

{

	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));

}



struct syscore_ops s3c2416_irq_syscore_ops = {

	.suspend	= s3c2416_irq_suspend,

	.resume		= s3c2416_irq_resume,

};

#endif

arch/arm/mach-s3c24xx/irq-s3c2443.c

deleted100644 → 0
+0 −281
Original line number Diff line number Diff line 
/* linux/arch/arm/mach-s3c2443/irq.c

 *

 * Copyright (c) 2007 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/device.h>

#include <linux/io.h>



#include <mach/hardware.h>

#include <asm/irq.h>



#include <asm/mach/irq.h>



#include <mach/regs-irq.h>

#include <mach/regs-gpio.h>



#include <plat/cpu.h>

#include <plat/pm.h>

#include <plat/irq.h>



#define INTMSK(start, end) ((1 << ((end) + 1 - (start))) - 1)



static inline void s3c2443_irq_demux(unsigned int irq, unsigned int len)

{

	unsigned int subsrc, submsk;

	unsigned int end;



	/* 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 >>= (irq - S3C2410_IRQSUB(0));

	subsrc  &= (1 << len)-1;



	end = len + irq;



	for (; irq < end && subsrc; irq++) {

		if (subsrc & 1)

			generic_handle_irq(irq);



		subsrc >>= 1;

	}

}



/* WDT/AC97 sub interrupts */



static void s3c2443_irq_demux_wdtac97(unsigned int irq, struct irq_desc *desc)

{

	s3c2443_irq_demux(IRQ_S3C2443_WDT, 4);

}



#define INTMSK_WDTAC97	(1UL << (IRQ_WDT - IRQ_EINT0))

#define SUBMSK_WDTAC97	INTMSK(IRQ_S3C2443_WDT, IRQ_S3C2443_AC97)



static void s3c2443_irq_wdtac97_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);

}



static void s3c2443_irq_wdtac97_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_WDTAC97);

}



static void s3c2443_irq_wdtac97_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_WDTAC97, SUBMSK_WDTAC97);

}



static struct irq_chip s3c2443_irq_wdtac97 = {

	.irq_mask	= s3c2443_irq_wdtac97_mask,

	.irq_unmask	= s3c2443_irq_wdtac97_unmask,

	.irq_ack	= s3c2443_irq_wdtac97_ack,

};



/* LCD sub interrupts */



static void s3c2443_irq_demux_lcd(unsigned int irq, struct irq_desc *desc)

{

	s3c2443_irq_demux(IRQ_S3C2443_LCD1, 4);

}



#define INTMSK_LCD	(1UL << (IRQ_LCD - IRQ_EINT0))

#define SUBMSK_LCD	INTMSK(IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4)



static void s3c2443_irq_lcd_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_LCD, SUBMSK_LCD);

}



static void s3c2443_irq_lcd_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_LCD);

}



static void s3c2443_irq_lcd_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_LCD, SUBMSK_LCD);

}



static struct irq_chip s3c2443_irq_lcd = {

	.irq_mask	= s3c2443_irq_lcd_mask,

	.irq_unmask	= s3c2443_irq_lcd_unmask,

	.irq_ack	= s3c2443_irq_lcd_ack,

};



/* DMA sub interrupts */



static void s3c2443_irq_demux_dma(unsigned int irq, struct irq_desc *desc)

{

	s3c2443_irq_demux(IRQ_S3C2443_DMA0, 6);

}



#define INTMSK_DMA	(1UL << (IRQ_S3C2443_DMA - IRQ_EINT0))

#define SUBMSK_DMA	INTMSK(IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5)



static void s3c2443_irq_dma_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_DMA, SUBMSK_DMA);

}



static void s3c2443_irq_dma_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_DMA);

}



static void s3c2443_irq_dma_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_DMA, SUBMSK_DMA);

}



static struct irq_chip s3c2443_irq_dma = {

	.irq_mask	= s3c2443_irq_dma_mask,

	.irq_unmask	= s3c2443_irq_dma_unmask,

	.irq_ack	= s3c2443_irq_dma_ack,

};



/* UART3 sub interrupts */



static void s3c2443_irq_demux_uart3(unsigned int irq, struct irq_desc *desc)

{

	s3c2443_irq_demux(IRQ_S3C2443_RX3, 3);

}



#define INTMSK_UART3	(1UL << (IRQ_S3C2443_UART3 - IRQ_EINT0))

#define SUBMSK_UART3	(0x7 << (IRQ_S3C2443_RX3 - S3C2410_IRQSUB(0)))



static void s3c2443_irq_uart3_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_UART3, SUBMSK_UART3);

}



static void s3c2443_irq_uart3_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_UART3);

}



static void s3c2443_irq_uart3_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_UART3, SUBMSK_UART3);

}



static struct irq_chip s3c2443_irq_uart3 = {

	.irq_mask	= s3c2443_irq_uart3_mask,

	.irq_unmask	= s3c2443_irq_uart3_unmask,

	.irq_ack	= s3c2443_irq_uart3_ack,

};



/* CAM sub interrupts */



static void s3c2443_irq_demux_cam(unsigned int irq, struct irq_desc *desc)

{

	s3c2443_irq_demux(IRQ_S3C2440_CAM_C, 4);

}



#define INTMSK_CAM	(1UL << (IRQ_CAM - IRQ_EINT0))

#define SUBMSK_CAM	INTMSK(IRQ_S3C2440_CAM_C, IRQ_S3C2440_CAM_P)



static void s3c2443_irq_cam_mask(struct irq_data *data)

{

	s3c_irqsub_mask(data->irq, INTMSK_CAM, SUBMSK_CAM);

}



static void s3c2443_irq_cam_unmask(struct irq_data *data)

{

	s3c_irqsub_unmask(data->irq, INTMSK_CAM);

}



static void s3c2443_irq_cam_ack(struct irq_data *data)

{

	s3c_irqsub_maskack(data->irq, INTMSK_CAM, SUBMSK_CAM);

}



static struct irq_chip s3c2443_irq_cam = {

	.irq_mask	= s3c2443_irq_cam_mask,

	.irq_unmask	= s3c2443_irq_cam_unmask,

	.irq_ack	= s3c2443_irq_cam_ack,

};



/* IRQ initialisation code */



static int s3c2443_add_sub(unsigned int base,

				   void (*demux)(unsigned int,

						 struct irq_desc *),

				   struct irq_chip *chip,

				   unsigned int start, unsigned int end)

{

	unsigned int irqno;



	irq_set_chip_and_handler(base, &s3c_irq_level_chip, handle_level_irq);

	irq_set_chained_handler(base, demux);



	for (irqno = start; irqno <= end; irqno++) {

		irq_set_chip_and_handler(irqno, chip, handle_level_irq);

		set_irq_flags(irqno, IRQF_VALID);

	}



	return 0;

}



static int s3c2443_irq_add(struct device *dev,

				  struct subsys_interface *sif)

{

	printk("S3C2443: IRQ Support\n");



	s3c2443_add_sub(IRQ_CAM, s3c2443_irq_demux_cam, &s3c2443_irq_cam,

			IRQ_S3C2440_CAM_C, IRQ_S3C2440_CAM_P);



	s3c2443_add_sub(IRQ_LCD, s3c2443_irq_demux_lcd, &s3c2443_irq_lcd,

			IRQ_S3C2443_LCD1, IRQ_S3C2443_LCD4);



	s3c2443_add_sub(IRQ_S3C2443_DMA, s3c2443_irq_demux_dma,

			&s3c2443_irq_dma, IRQ_S3C2443_DMA0, IRQ_S3C2443_DMA5);



	s3c2443_add_sub(IRQ_S3C2443_UART3, s3c2443_irq_demux_uart3,

			&s3c2443_irq_uart3,

			IRQ_S3C2443_RX3, IRQ_S3C2443_ERR3);



	s3c2443_add_sub(IRQ_WDT, s3c2443_irq_demux_wdtac97,

			&s3c2443_irq_wdtac97,

			IRQ_S3C2443_WDT, IRQ_S3C2443_AC97);



	return 0;

}



static struct subsys_interface s3c2443_irq_interface = {

	.name		= "s3c2443_irq",

	.subsys		= &s3c2443_subsys,

	.add_dev	= s3c2443_irq_add,

};



static int __init s3c2443_irq_init(void)

{

	return subsys_interface_register(&s3c2443_irq_interface);

}



arch_initcall(s3c2443_irq_init);

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