Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s3c24xx/s3c244x-irq.c |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 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 | * |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 20 | */ |
| 21 | |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/ioport.h> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 26 | #include <linux/sysdev.h> |
| 27 | |
| 28 | #include <asm/hardware.h> |
| 29 | #include <asm/irq.h> |
| 30 | #include <asm/io.h> |
| 31 | |
| 32 | #include <asm/mach/irq.h> |
| 33 | |
| 34 | #include <asm/arch/regs-irq.h> |
| 35 | #include <asm/arch/regs-gpio.h> |
| 36 | |
Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 37 | #include <asm/plat-s3c24xx/cpu.h> |
| 38 | #include <asm/plat-s3c24xx/pm.h> |
| 39 | #include <asm/plat-s3c24xx/irq.h> |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 40 | |
| 41 | /* camera irq */ |
| 42 | |
| 43 | static void s3c_irq_demux_cam(unsigned int irq, |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 44 | struct irq_desc *desc) |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 45 | { |
| 46 | unsigned int subsrc, submsk; |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 47 | struct irq_desc *mydesc; |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 48 | |
| 49 | /* read the current pending interrupts, and the mask |
| 50 | * for what it is available */ |
| 51 | |
| 52 | subsrc = __raw_readl(S3C2410_SUBSRCPND); |
| 53 | submsk = __raw_readl(S3C2410_INTSUBMSK); |
| 54 | |
| 55 | subsrc &= ~submsk; |
| 56 | subsrc >>= 11; |
| 57 | subsrc &= 3; |
| 58 | |
| 59 | if (subsrc != 0) { |
| 60 | if (subsrc & 1) { |
| 61 | mydesc = irq_desc + IRQ_S3C2440_CAM_C; |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 62 | desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 63 | } |
| 64 | if (subsrc & 2) { |
| 65 | mydesc = irq_desc + IRQ_S3C2440_CAM_P; |
Linus Torvalds | 0cd61b6 | 2006-10-06 10:53:39 -0700 | [diff] [blame] | 66 | desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 67 | } |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0)) |
| 72 | |
| 73 | static void |
| 74 | s3c_irq_cam_mask(unsigned int irqno) |
| 75 | { |
| 76 | s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11); |
| 77 | } |
| 78 | |
| 79 | static void |
| 80 | s3c_irq_cam_unmask(unsigned int irqno) |
| 81 | { |
| 82 | s3c_irqsub_unmask(irqno, INTMSK_CAM); |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | s3c_irq_cam_ack(unsigned int irqno) |
| 87 | { |
| 88 | s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11); |
| 89 | } |
| 90 | |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 91 | static struct irq_chip s3c_irq_cam = { |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 92 | .mask = s3c_irq_cam_mask, |
| 93 | .unmask = s3c_irq_cam_unmask, |
| 94 | .ack = s3c_irq_cam_ack, |
| 95 | }; |
| 96 | |
| 97 | static int s3c244x_irq_add(struct sys_device *sysdev) |
| 98 | { |
| 99 | unsigned int irqno; |
| 100 | |
| 101 | set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip); |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 102 | set_irq_handler(IRQ_NFCON, handle_level_irq); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 103 | set_irq_flags(IRQ_NFCON, IRQF_VALID); |
| 104 | |
| 105 | /* add chained handler for camera */ |
| 106 | |
| 107 | set_irq_chip(IRQ_CAM, &s3c_irq_level_chip); |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 108 | set_irq_handler(IRQ_CAM, handle_level_irq); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 109 | set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam); |
| 110 | |
| 111 | for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) { |
| 112 | set_irq_chip(irqno, &s3c_irq_cam); |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 113 | set_irq_handler(irqno, handle_level_irq); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 114 | set_irq_flags(irqno, IRQF_VALID); |
| 115 | } |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
Ben Dooks | 189e74e | 2006-09-09 19:44:50 +0100 | [diff] [blame] | 120 | static struct sysdev_driver s3c2440_irq_driver = { |
Ben Dooks | 1e582fc | 2006-09-16 00:01:39 +0100 | [diff] [blame] | 121 | .add = s3c244x_irq_add, |
| 122 | .suspend = s3c24xx_irq_suspend, |
| 123 | .resume = s3c24xx_irq_resume, |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 124 | }; |
| 125 | |
| 126 | static int s3c2440_irq_init(void) |
| 127 | { |
Ben Dooks | 189e74e | 2006-09-09 19:44:50 +0100 | [diff] [blame] | 128 | return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | arch_initcall(s3c2440_irq_init); |
| 132 | |
Ben Dooks | 189e74e | 2006-09-09 19:44:50 +0100 | [diff] [blame] | 133 | static struct sysdev_driver s3c2442_irq_driver = { |
Ben Dooks | 1e582fc | 2006-09-16 00:01:39 +0100 | [diff] [blame] | 134 | .add = s3c244x_irq_add, |
| 135 | .suspend = s3c24xx_irq_suspend, |
| 136 | .resume = s3c24xx_irq_resume, |
Ben Dooks | 189e74e | 2006-09-09 19:44:50 +0100 | [diff] [blame] | 137 | }; |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 138 | |
Ben Dooks | 1e582fc | 2006-09-16 00:01:39 +0100 | [diff] [blame] | 139 | |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 140 | static int s3c2442_irq_init(void) |
| 141 | { |
Ben Dooks | 189e74e | 2006-09-09 19:44:50 +0100 | [diff] [blame] | 142 | return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver); |
Ben Dooks | 96ce238 | 2006-06-18 23:06:41 +0100 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | arch_initcall(s3c2442_irq_init); |