/* 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 * * Changelog: * 25-Jul-2005 BJD Split from irq.c * */ #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 s3c244x_irq_driver = { .add = s3c244x_irq_add, }; static int s3c2440_irq_init(void) { return sysdev_driver_register(&s3c2440_sysclass, &s3c244x_irq_driver); } arch_initcall(s3c2440_irq_init); static int s3c2442_irq_init(void) { return sysdev_driver_register(&s3c2442_sysclass, &s3c244x_irq_driver); } arch_initcall(s3c2442_irq_init);