Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 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 | * Changelog: |
| 21 | * 25-Jul-2005 BJD Split from irq.c |
| 22 | * |
| 23 | */ |
| 24 | |
| 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> |
| 31 | |
| 32 | #include <asm/hardware.h> |
| 33 | #include <asm/irq.h> |
| 34 | #include <asm/io.h> |
| 35 | |
| 36 | #include <asm/mach/irq.h> |
| 37 | |
| 38 | #include <asm/arch/regs-irq.h> |
| 39 | #include <asm/arch/regs-gpio.h> |
| 40 | |
| 41 | #include "cpu.h" |
| 42 | #include "pm.h" |
| 43 | #include "irq.h" |
| 44 | |
| 45 | /* camera irq */ |
| 46 | |
| 47 | static void s3c_irq_demux_cam(unsigned int irq, |
| 48 | struct irqdesc *desc, |
| 49 | struct pt_regs *regs) |
| 50 | { |
| 51 | unsigned int subsrc, submsk; |
| 52 | struct irqdesc *mydesc; |
| 53 | |
| 54 | /* read the current pending interrupts, and the mask |
| 55 | * for what it is available */ |
| 56 | |
| 57 | subsrc = __raw_readl(S3C2410_SUBSRCPND); |
| 58 | submsk = __raw_readl(S3C2410_INTSUBMSK); |
| 59 | |
| 60 | subsrc &= ~submsk; |
| 61 | subsrc >>= 11; |
| 62 | subsrc &= 3; |
| 63 | |
| 64 | if (subsrc != 0) { |
| 65 | if (subsrc & 1) { |
| 66 | mydesc = irq_desc + IRQ_S3C2440_CAM_C; |
| 67 | desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc, regs); |
| 68 | } |
| 69 | if (subsrc & 2) { |
| 70 | mydesc = irq_desc + IRQ_S3C2440_CAM_P; |
| 71 | desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc, regs); |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0)) |
| 77 | |
| 78 | static void |
| 79 | s3c_irq_cam_mask(unsigned int irqno) |
| 80 | { |
| 81 | s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11); |
| 82 | } |
| 83 | |
| 84 | static void |
| 85 | s3c_irq_cam_unmask(unsigned int irqno) |
| 86 | { |
| 87 | s3c_irqsub_unmask(irqno, INTMSK_CAM); |
| 88 | } |
| 89 | |
| 90 | static void |
| 91 | s3c_irq_cam_ack(unsigned int irqno) |
| 92 | { |
| 93 | s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11); |
| 94 | } |
| 95 | |
| 96 | static struct irqchip s3c_irq_cam = { |
| 97 | .mask = s3c_irq_cam_mask, |
| 98 | .unmask = s3c_irq_cam_unmask, |
| 99 | .ack = s3c_irq_cam_ack, |
| 100 | }; |
| 101 | |
| 102 | static int s3c244x_irq_add(struct sys_device *sysdev) |
| 103 | { |
| 104 | unsigned int irqno; |
| 105 | |
| 106 | set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip); |
| 107 | set_irq_handler(IRQ_NFCON, do_level_IRQ); |
| 108 | set_irq_flags(IRQ_NFCON, IRQF_VALID); |
| 109 | |
| 110 | /* add chained handler for camera */ |
| 111 | |
| 112 | set_irq_chip(IRQ_CAM, &s3c_irq_level_chip); |
| 113 | set_irq_handler(IRQ_CAM, do_level_IRQ); |
| 114 | set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam); |
| 115 | |
| 116 | for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) { |
| 117 | set_irq_chip(irqno, &s3c_irq_cam); |
| 118 | set_irq_handler(irqno, do_level_IRQ); |
| 119 | set_irq_flags(irqno, IRQF_VALID); |
| 120 | } |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static struct sysdev_driver s3c244x_irq_driver = { |
| 126 | .add = s3c244x_irq_add, |
| 127 | }; |
| 128 | |
| 129 | static int s3c2440_irq_init(void) |
| 130 | { |
| 131 | return sysdev_driver_register(&s3c2440_sysclass, &s3c244x_irq_driver); |
| 132 | } |
| 133 | |
| 134 | arch_initcall(s3c2440_irq_init); |
| 135 | |
| 136 | |
| 137 | static int s3c2442_irq_init(void) |
| 138 | { |
| 139 | return sysdev_driver_register(&s3c2442_sysclass, &s3c244x_irq_driver); |
| 140 | } |
| 141 | |
| 142 | arch_initcall(s3c2442_irq_init); |