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f30c2269 | 1 | /* linux/arch/arm/mach-s3c2410/s3c2410-gpio.c |
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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 | |
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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 | ||
35 | int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on, | |
36 | unsigned int config) | |
37 | { | |
44cc7c9c | 38 | void __iomem *reg = S3C24XX_EINFLT0; |
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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 | ||
a3ff5502 | 47 | pin -= S3C2410_GPG8; |
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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 | ||
44cc7c9c | 61 | val = __raw_readl(S3C24XX_EXTINT2); |
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62 | val &= ~(1 << ((pin * 4) + 3)); |
63 | val |= on << ((pin * 4) + 3); | |
44cc7c9c | 64 | __raw_writel(val, S3C24XX_EXTINT2); |
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65 | |
66 | local_irq_restore(flags); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | EXPORT_SYMBOL(s3c2410_gpio_irqfilter); | |
72 | ||
73 | int s3c2410_gpio_getirq(unsigned int pin) | |
74 | { | |
a3ff5502 | 75 | if (pin < S3C2410_GPF0 || pin > S3C2410_GPG15) |
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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 | ||
90 | EXPORT_SYMBOL(s3c2410_gpio_getirq); |