1 /* linux/arch/arm/mach-s3c2410/s3c244x-irq.c
3 * Copyright (c) 2003,2004 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/interrupt.h>
25 #include <linux/ioport.h>
26 #include <linux/ptrace.h>
27 #include <linux/sysdev.h>
29 #include <asm/hardware.h>
33 #include <asm/mach/irq.h>
35 #include <asm/arch/regs-irq.h>
36 #include <asm/arch/regs-gpio.h>
44 static void s3c_irq_demux_cam(unsigned int irq,
45 struct irq_desc *desc)
47 unsigned int subsrc, submsk;
48 struct irq_desc *mydesc;
50 /* read the current pending interrupts, and the mask
51 * for what it is available */
53 subsrc = __raw_readl(S3C2410_SUBSRCPND);
54 submsk = __raw_readl(S3C2410_INTSUBMSK);
62 mydesc = irq_desc + IRQ_S3C2440_CAM_C;
63 desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc);
66 mydesc = irq_desc + IRQ_S3C2440_CAM_P;
67 desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc);
72 #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
75 s3c_irq_cam_mask(unsigned int irqno)
77 s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
81 s3c_irq_cam_unmask(unsigned int irqno)
83 s3c_irqsub_unmask(irqno, INTMSK_CAM);
87 s3c_irq_cam_ack(unsigned int irqno)
89 s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
92 static struct irq_chip s3c_irq_cam = {
93 .mask = s3c_irq_cam_mask,
94 .unmask = s3c_irq_cam_unmask,
95 .ack = s3c_irq_cam_ack,
98 static int s3c244x_irq_add(struct sys_device *sysdev)
102 set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
103 set_irq_handler(IRQ_NFCON, handle_level_irq);
104 set_irq_flags(IRQ_NFCON, IRQF_VALID);
106 /* add chained handler for camera */
108 set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
109 set_irq_handler(IRQ_CAM, handle_level_irq);
110 set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
112 for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
113 set_irq_chip(irqno, &s3c_irq_cam);
114 set_irq_handler(irqno, handle_level_irq);
115 set_irq_flags(irqno, IRQF_VALID);
121 static struct sysdev_driver s3c2440_irq_driver = {
122 .add = s3c244x_irq_add,
123 .suspend = s3c24xx_irq_suspend,
124 .resume = s3c24xx_irq_resume,
127 static int s3c2440_irq_init(void)
129 return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
132 arch_initcall(s3c2440_irq_init);
134 static struct sysdev_driver s3c2442_irq_driver = {
135 .add = s3c244x_irq_add,
136 .suspend = s3c24xx_irq_suspend,
137 .resume = s3c24xx_irq_resume,
141 static int s3c2442_irq_init(void)
143 return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
146 arch_initcall(s3c2442_irq_init);