arch/arm/mach-s3c2443/irq.c - kernel/windcharger - Git at Google

 /* 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 __init 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 __init 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);
	/* 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 __init 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 __init 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);