1 /* linux/arch/arm/mach-s3c2410/s3c2440-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
21 * 25-Jul-2005 BJD Split from irq.c
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/interrupt.h>
28 #include <linux/ioport.h>
29 #include <linux/ptrace.h>
30 #include <linux/sysdev.h>
32 #include <asm/hardware.h>
36 #include <asm/mach/irq.h>
38 #include <asm/arch/regs-irq.h>
39 #include <asm/arch/regs-gpio.h>
47 static void s3c_irq_demux_wdtac97(unsigned int irq,
51 unsigned int subsrc, submsk;
52 struct irqdesc *mydesc;
54 /* read the current pending interrupts, and the mask
55 * for what it is available */
57 subsrc = __raw_readl(S3C2410_SUBSRCPND);
58 submsk = __raw_readl(S3C2410_INTSUBMSK);
66 mydesc = irq_desc + IRQ_S3C2440_WDT;
67 mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
70 mydesc = irq_desc + IRQ_S3C2440_AC97;
71 mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
77 #define INTMSK_WDT (1UL << (IRQ_WDT - IRQ_EINT0))
80 s3c_irq_wdtac97_mask(unsigned int irqno)
82 s3c_irqsub_mask(irqno, INTMSK_WDT, 3<<13);
86 s3c_irq_wdtac97_unmask(unsigned int irqno)
88 s3c_irqsub_unmask(irqno, INTMSK_WDT);
92 s3c_irq_wdtac97_ack(unsigned int irqno)
94 s3c_irqsub_maskack(irqno, INTMSK_WDT, 3<<13);
97 static struct irqchip s3c_irq_wdtac97 = {
98 .mask = s3c_irq_wdtac97_mask,
99 .unmask = s3c_irq_wdtac97_unmask,
100 .ack = s3c_irq_wdtac97_ack,
105 static void s3c_irq_demux_cam(unsigned int irq,
106 struct irqdesc *desc,
107 struct pt_regs *regs)
109 unsigned int subsrc, submsk;
110 struct irqdesc *mydesc;
112 /* read the current pending interrupts, and the mask
113 * for what it is available */
115 subsrc = __raw_readl(S3C2410_SUBSRCPND);
116 submsk = __raw_readl(S3C2410_INTSUBMSK);
124 mydesc = irq_desc + IRQ_S3C2440_CAM_C;
125 mydesc->handle( IRQ_S3C2440_WDT, mydesc, regs);
128 mydesc = irq_desc + IRQ_S3C2440_CAM_P;
129 mydesc->handle(IRQ_S3C2440_AC97, mydesc, regs);
134 #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
137 s3c_irq_cam_mask(unsigned int irqno)
139 s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
143 s3c_irq_cam_unmask(unsigned int irqno)
145 s3c_irqsub_unmask(irqno, INTMSK_CAM);
149 s3c_irq_cam_ack(unsigned int irqno)
151 s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
154 static struct irqchip s3c_irq_cam = {
155 .mask = s3c_irq_cam_mask,
156 .unmask = s3c_irq_cam_unmask,
157 .ack = s3c_irq_cam_ack,
160 static int s3c2440_irq_add(struct sys_device *sysdev)
164 printk("S3C2440: IRQ Support\n");
166 set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
167 set_irq_handler(IRQ_NFCON, do_level_IRQ);
168 set_irq_flags(IRQ_NFCON, IRQF_VALID);
170 /* add new chained handler for wdt, ac7 */
172 set_irq_chip(IRQ_WDT, &s3c_irq_level_chip);
173 set_irq_handler(IRQ_WDT, do_level_IRQ);
174 set_irq_chained_handler(IRQ_WDT, s3c_irq_demux_wdtac97);
176 for (irqno = IRQ_S3C2440_WDT; irqno <= IRQ_S3C2440_AC97; irqno++) {
177 set_irq_chip(irqno, &s3c_irq_wdtac97);
178 set_irq_handler(irqno, do_level_IRQ);
179 set_irq_flags(irqno, IRQF_VALID);
182 /* add chained handler for camera */
184 set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
185 set_irq_handler(IRQ_CAM, do_level_IRQ);
186 set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
188 for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
189 set_irq_chip(irqno, &s3c_irq_cam);
190 set_irq_handler(irqno, do_level_IRQ);
191 set_irq_flags(irqno, IRQF_VALID);
197 static struct sysdev_driver s3c2440_irq_driver = {
198 .add = s3c2440_irq_add,
201 static int s3c24xx_irq_driver(void)
203 return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
206 arch_initcall(s3c24xx_irq_driver);