Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[pandora-kernel.git] / arch / arm / mach-s3c2410 / s3c244x-irq.c
1 /* linux/arch/arm/mach-s3c2410/s3c2440-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 irqdesc *desc,
46                               struct pt_regs *regs)
47 {
48         unsigned int subsrc, submsk;
49         struct irqdesc *mydesc;
50
51         /* read the current pending interrupts, and the mask
52          * for what it is available */
53
54         subsrc = __raw_readl(S3C2410_SUBSRCPND);
55         submsk = __raw_readl(S3C2410_INTSUBMSK);
56
57         subsrc &= ~submsk;
58         subsrc >>= 11;
59         subsrc &= 3;
60
61         if (subsrc != 0) {
62                 if (subsrc & 1) {
63                         mydesc = irq_desc + IRQ_S3C2440_CAM_C;
64                         desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc, regs);
65                 }
66                 if (subsrc & 2) {
67                         mydesc = irq_desc + IRQ_S3C2440_CAM_P;
68                         desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc, regs);
69                 }
70         }
71 }
72
73 #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
74
75 static void
76 s3c_irq_cam_mask(unsigned int irqno)
77 {
78         s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
79 }
80
81 static void
82 s3c_irq_cam_unmask(unsigned int irqno)
83 {
84         s3c_irqsub_unmask(irqno, INTMSK_CAM);
85 }
86
87 static void
88 s3c_irq_cam_ack(unsigned int irqno)
89 {
90         s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
91 }
92
93 static struct irqchip s3c_irq_cam = {
94         .mask       = s3c_irq_cam_mask,
95         .unmask     = s3c_irq_cam_unmask,
96         .ack        = s3c_irq_cam_ack,
97 };
98
99 static int s3c244x_irq_add(struct sys_device *sysdev)
100 {
101         unsigned int irqno;
102
103         set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
104         set_irq_handler(IRQ_NFCON, do_level_IRQ);
105         set_irq_flags(IRQ_NFCON, IRQF_VALID);
106
107         /* add chained handler for camera */
108
109         set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
110         set_irq_handler(IRQ_CAM, do_level_IRQ);
111         set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
112
113         for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
114                 set_irq_chip(irqno, &s3c_irq_cam);
115                 set_irq_handler(irqno, do_level_IRQ);
116                 set_irq_flags(irqno, IRQF_VALID);
117         }
118
119         return 0;
120 }
121
122 static struct sysdev_driver s3c2440_irq_driver = {
123         .add            = s3c244x_irq_add,
124         .suspend        = s3c24xx_irq_suspend,
125         .resume         = s3c24xx_irq_resume,
126 };
127
128 static int s3c2440_irq_init(void)
129 {
130         return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
131 }
132
133 arch_initcall(s3c2440_irq_init);
134
135 static struct sysdev_driver s3c2442_irq_driver = {
136         .add            = s3c244x_irq_add,
137         .suspend        = s3c24xx_irq_suspend,
138         .resume         = s3c24xx_irq_resume,
139 };
140
141
142 static int s3c2442_irq_init(void)
143 {
144         return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
145 }
146
147 arch_initcall(s3c2442_irq_init);