projects / deliverable / linux.git / blame
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|---|---|---|
| c6e58ebb BD |
1 | /* linux/arch/arm/mach-s3c2412/s3c2412-irq.c |
| 2 | * | |
| 3 | * Copyright (c) 2006 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 "irq.h" | |
| 40 | ||
| 41 | /* the s3c2412 changes the behaviour of IRQ_EINT0 through IRQ_EINT3 by | |
| 42 | * having them turn up in both the INT* and the EINT* registers. Whilst | |
| 43 | * both show the status, they both now need to be acked when the IRQs | |
| 44 | * go off. | |
| 45 | */ | |
| 46 | ||
| 47 | static void | |
| 48 | s3c2412_irq_mask(unsigned int irqno) | |
| 49 | { | |
| 50 | unsigned long bitval = 1UL << (irqno - IRQ_EINT0); | |
| 51 | unsigned long mask; | |
| 52 | ||
| 53 | mask = __raw_readl(S3C2410_INTMSK); | |
| 54 | __raw_writel(mask | bitval, S3C2410_INTMSK); | |
| 55 | ||
| 56 | mask = __raw_readl(S3C2412_EINTMASK); | |
| 57 | __raw_writel(mask | bitval, S3C2412_EINTMASK); | |
| 58 | } | |
| 59 | ||
| 60 | static inline void | |
| 61 | s3c2412_irq_ack(unsigned int irqno) | |
| 62 | { | |
| 63 | unsigned long bitval = 1UL << (irqno - IRQ_EINT0); | |
| 64 | ||
| 65 | __raw_writel(bitval, S3C2412_EINTPEND); | |
| 66 | __raw_writel(bitval, S3C2410_SRCPND); | |
| 67 | __raw_writel(bitval, S3C2410_INTPND); | |
| 68 | } | |
| 69 | ||
| 70 | static inline void | |
| 71 | s3c2412_irq_maskack(unsigned int irqno) | |
| 72 | { | |
| 73 | unsigned long bitval = 1UL << (irqno - IRQ_EINT0); | |
| 74 | unsigned long mask; | |
| 75 | ||
| 76 | mask = __raw_readl(S3C2410_INTMSK); | |
| 77 | __raw_writel(mask|bitval, S3C2410_INTMSK); | |
| 78 | ||
| 79 | mask = __raw_readl(S3C2412_EINTMASK); | |
| 80 | __raw_writel(mask | bitval, S3C2412_EINTMASK); | |
| 81 | ||
| 82 | __raw_writel(bitval, S3C2412_EINTPEND); | |
| 83 | __raw_writel(bitval, S3C2410_SRCPND); | |
| 84 | __raw_writel(bitval, S3C2410_INTPND); | |
| 85 | } | |
| 86 | ||
| 87 | static void | |
| 88 | s3c2412_irq_unmask(unsigned int irqno) | |
| 89 | { | |
| 90 | unsigned long bitval = 1UL << (irqno - IRQ_EINT0); | |
| 91 | unsigned long mask; | |
| 92 | ||
| 93 | mask = __raw_readl(S3C2412_EINTMASK); | |
| 94 | __raw_writel(mask & ~bitval, S3C2412_EINTMASK); | |
| 95 | ||
| 96 | mask = __raw_readl(S3C2410_INTMSK); | |
| 97 | __raw_writel(mask & ~bitval, S3C2410_INTMSK); | |
| 98 | } | |
| 99 | ||
| 100 | static struct irqchip s3c2412_irq_eint0t4 = { | |
| 101 | .ack = s3c2412_irq_ack, | |
| 102 | .mask = s3c2412_irq_mask, | |
| 103 | .unmask = s3c2412_irq_unmask, | |
| 104 | .set_wake = s3c_irq_wake, | |
| 105 | .set_type = s3c_irqext_type, | |
| 106 | }; | |
| 107 | ||
| 108 | static int s3c2412_irq_add(struct sys_device *sysdev) | |
| 109 | { | |
| 110 | unsigned int irqno; | |
| 111 | ||
| 112 | for (irqno = IRQ_EINT0; irqno <= IRQ_EINT3; irqno++) { | |
| 113 | set_irq_chip(irqno, &s3c2412_irq_eint0t4); | |
| 114 | set_irq_handler(irqno, do_edge_IRQ); | |
| 115 | set_irq_flags(irqno, IRQF_VALID); | |
| 116 | } | |
| 117 | ||
| 118 | return 0; | |
| 119 | } | |
| 120 | ||
| 121 | static struct sysdev_driver s3c2412_irq_driver = { | |
| 122 | .add = s3c2412_irq_add, | |
| 123 | }; | |
| 124 | ||
| 125 | static int s3c2412_irq_init(void) | |
| 126 | { | |
| 127 | return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_irq_driver); | |
| 128 | } | |
| 129 | ||
| 130 | arch_initcall(s3c2412_irq_init); |