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review.evervolv.com / android_kernel_oneplus_msm8996 / c5780e976e19faff345fcef4a01db87108b51a44 / . / arch / arm / mach-s3c2410 / s3c2410-gpio.c
blob: 471a714900103c55c034d6c396f5c6cb9ad2b082 [file] [log] [blame]
Lucas Correia Villa Real0ca5bc32006-02-01 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
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]21 */
22
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/interrupt.h>
27#include <linux/ioport.h>
28
29#include <asm/hardware.h>
30#include <asm/irq.h>
31#include <asm/io.h>
32
33#include <asm/arch/regs-gpio.h>
34
35int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
36 unsigned int config)
37{
Ben Dooks44cc7c92006-06-24 21:21:33 +0100[diff] [blame]38 void __iomem *reg = S3C24XX_EINFLT0;
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]39 unsigned long flags;
40 unsigned long val;
41
42 if (pin < S3C2410_GPG8 || pin > S3C2410_GPG15)
43 return -1;
44
45 config &= 0xff;
46
Ben Dooksa3ff5502006-06-24 21:21:26 +0100[diff] [blame]47 pin -= S3C2410_GPG8;
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]48 reg += pin & ~3;
49
50 local_irq_save(flags);
51
52 /* update filter width and clock source */
53
54 val = __raw_readl(reg);
55 val &= ~(0xff << ((pin & 3) * 8));
56 val |= config << ((pin & 3) * 8);
57 __raw_writel(val, reg);
58
59 /* update filter enable */
60
Ben Dooks44cc7c92006-06-24 21:21:33 +0100[diff] [blame]61 val = __raw_readl(S3C24XX_EXTINT2);
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]62 val &= ~(1 << ((pin * 4) + 3));
63 val |= on << ((pin * 4) + 3);
Ben Dooks44cc7c92006-06-24 21:21:33 +0100[diff] [blame]64 __raw_writel(val, S3C24XX_EXTINT2);
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]65
66 local_irq_restore(flags);
67
68 return 0;
69}
70
71EXPORT_SYMBOL(s3c2410_gpio_irqfilter);
72
73int s3c2410_gpio_getirq(unsigned int pin)
74{
Ben Dooksa3ff5502006-06-24 21:21:26 +0100[diff] [blame]75 if (pin < S3C2410_GPF0 || pin > S3C2410_GPG15)
Lucas Correia Villa Real0ca5bc32006-02-01 21:24:23 +0000[diff] [blame]76 return -1; /* not valid interrupts */
77
78 if (pin < S3C2410_GPG0 && pin > S3C2410_GPF7)
79 return -1; /* not valid pin */
80
81 if (pin < S3C2410_GPF4)
82 return (pin - S3C2410_GPF0) + IRQ_EINT0;
83
84 if (pin < S3C2410_GPG0)
85 return (pin - S3C2410_GPF4) + IRQ_EINT4;
86
87 return (pin - S3C2410_GPG0) + IRQ_EINT8;
88}
89
90EXPORT_SYMBOL(s3c2410_gpio_getirq);