| Lucas Correia Villa Real | 0ca5bc3 | 2006-02-01 21:24:23 +0000 | [diff] [blame^] | 1 | /* linux/arch/arm/mach-s3c2410/gpio.c |
| 2 | * |
| 3 | * Copyright (c) 2004-2006 Simtec Electronics |
| 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * |
| 6 | * S3C2410 GPIO support |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | * Changelog |
| 23 | * 15-Jan-2006 LCVR Splitted from gpio.c |
| 24 | */ |
| 25 | |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/ioport.h> |
| 31 | |
| 32 | #include <asm/hardware.h> |
| 33 | #include <asm/irq.h> |
| 34 | #include <asm/io.h> |
| 35 | |
| 36 | #include <asm/arch/regs-gpio.h> |
| 37 | |
| 38 | int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on, |
| 39 | unsigned int config) |
| 40 | { |
| 41 | void __iomem *reg = S3C2410_EINFLT0; |
| 42 | unsigned long flags; |
| 43 | unsigned long val; |
| 44 | |
| 45 | if (pin < S3C2410_GPG8 || pin > S3C2410_GPG15) |
| 46 | return -1; |
| 47 | |
| 48 | config &= 0xff; |
| 49 | |
| 50 | pin -= S3C2410_GPG8_EINT16; |
| 51 | reg += pin & ~3; |
| 52 | |
| 53 | local_irq_save(flags); |
| 54 | |
| 55 | /* update filter width and clock source */ |
| 56 | |
| 57 | val = __raw_readl(reg); |
| 58 | val &= ~(0xff << ((pin & 3) * 8)); |
| 59 | val |= config << ((pin & 3) * 8); |
| 60 | __raw_writel(val, reg); |
| 61 | |
| 62 | /* update filter enable */ |
| 63 | |
| 64 | val = __raw_readl(S3C2410_EXTINT2); |
| 65 | val &= ~(1 << ((pin * 4) + 3)); |
| 66 | val |= on << ((pin * 4) + 3); |
| 67 | __raw_writel(val, S3C2410_EXTINT2); |
| 68 | |
| 69 | local_irq_restore(flags); |
| 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | EXPORT_SYMBOL(s3c2410_gpio_irqfilter); |
| 75 | |
| 76 | int s3c2410_gpio_getirq(unsigned int pin) |
| 77 | { |
| 78 | if (pin < S3C2410_GPF0 || pin > S3C2410_GPG15_EINT23) |
| 79 | return -1; /* not valid interrupts */ |
| 80 | |
| 81 | if (pin < S3C2410_GPG0 && pin > S3C2410_GPF7) |
| 82 | return -1; /* not valid pin */ |
| 83 | |
| 84 | if (pin < S3C2410_GPF4) |
| 85 | return (pin - S3C2410_GPF0) + IRQ_EINT0; |
| 86 | |
| 87 | if (pin < S3C2410_GPG0) |
| 88 | return (pin - S3C2410_GPF4) + IRQ_EINT4; |
| 89 | |
| 90 | return (pin - S3C2410_GPG0) + IRQ_EINT8; |
| 91 | } |
| 92 | |
| 93 | EXPORT_SYMBOL(s3c2410_gpio_getirq); |