Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...
[linux-2.6] / arch / arm / mach-s3c2410 / s3c244x-irq.c
1 /* linux/arch/arm/mach-s3c2410/s3c244x-irq.c
2  *
3  * Copyright (c) 2003,2004 Simtec Electronics
4  *      Ben Dooks <ben@simtec.co.uk>
5  *
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.
10  *
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.
15  *
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
19  *
20 */
21
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>
28
29 #include <asm/hardware.h>
30 #include <asm/irq.h>
31 #include <asm/io.h>
32
33 #include <asm/mach/irq.h>
34
35 #include <asm/arch/regs-irq.h>
36 #include <asm/arch/regs-gpio.h>
37
38 #include "cpu.h"
39 #include "pm.h"
40 #include "irq.h"
41
42 /* camera irq */
43
44 static void s3c_irq_demux_cam(unsigned int irq,
45                               struct irq_desc *desc)
46 {
47         unsigned int subsrc, submsk;
48         struct irq_desc *mydesc;
49
50         /* read the current pending interrupts, and the mask
51          * for what it is available */
52
53         subsrc = __raw_readl(S3C2410_SUBSRCPND);
54         submsk = __raw_readl(S3C2410_INTSUBMSK);
55
56         subsrc &= ~submsk;
57         subsrc >>= 11;
58         subsrc &= 3;
59
60         if (subsrc != 0) {
61                 if (subsrc & 1) {
62                         mydesc = irq_desc + IRQ_S3C2440_CAM_C;
63                         desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc);
64                 }
65                 if (subsrc & 2) {
66                         mydesc = irq_desc + IRQ_S3C2440_CAM_P;
67                         desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc);
68                 }
69         }
70 }
71
72 #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
73
74 static void
75 s3c_irq_cam_mask(unsigned int irqno)
76 {
77         s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
78 }
79
80 static void
81 s3c_irq_cam_unmask(unsigned int irqno)
82 {
83         s3c_irqsub_unmask(irqno, INTMSK_CAM);
84 }
85
86 static void
87 s3c_irq_cam_ack(unsigned int irqno)
88 {
89         s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
90 }
91
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,
96 };
97
98 static int s3c244x_irq_add(struct sys_device *sysdev)
99 {
100         unsigned int irqno;
101
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);
105
106         /* add chained handler for camera */
107
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);
111
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);
116         }
117
118         return 0;
119 }
120
121 static struct sysdev_driver s3c2440_irq_driver = {
122         .add            = s3c244x_irq_add,
123         .suspend        = s3c24xx_irq_suspend,
124         .resume         = s3c24xx_irq_resume,
125 };
126
127 static int s3c2440_irq_init(void)
128 {
129         return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
130 }
131
132 arch_initcall(s3c2440_irq_init);
133
134 static struct sysdev_driver s3c2442_irq_driver = {
135         .add            = s3c244x_irq_add,
136         .suspend        = s3c24xx_irq_suspend,
137         .resume         = s3c24xx_irq_resume,
138 };
139
140
141 static int s3c2442_irq_init(void)
142 {
143         return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
144 }
145
146 arch_initcall(s3c2442_irq_init);