[ARM] S3C24XX: GPIO: Change to macros for GPIO numbering
[linux-2.6.git] / arch / arm / plat-s3c24xx / gpiolib.c
1 /* linux/arch/arm/plat-s3c24xx/gpiolib.c
2  *
3  * Copyright (c) 2008 Simtec Electronics
4  *      http://armlinux.simtec.co.uk/
5  *      Ben Dooks <ben@simtec.co.uk>
6  *
7  * S3C24XX GPIOlib support
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License.
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/sysdev.h>
19 #include <linux/ioport.h>
20 #include <linux/io.h>
21 #include <linux/gpio.h>
22
23 #include <mach/gpio-core.h>
24 #include <mach/hardware.h>
25 #include <asm/irq.h>
26 #include <plat/pm.h>
27
28 #include <mach/regs-gpio.h>
29
30 static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
31 {
32         return -EINVAL;
33 }
34
35 static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
36                                         unsigned offset, int value)
37 {
38         struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
39         void __iomem *base = ourchip->base;
40         unsigned long flags;
41         unsigned long dat;
42         unsigned long con;
43
44         local_irq_save(flags);
45
46         con = __raw_readl(base + 0x00);
47         dat = __raw_readl(base + 0x04);
48
49         dat &= ~(1 << offset);
50         if (value)
51                 dat |= 1 << offset;
52
53         __raw_writel(dat, base + 0x04);
54
55         con &= ~(1 << offset);
56
57         __raw_writel(con, base + 0x00);
58         __raw_writel(dat, base + 0x04);
59
60         local_irq_restore(flags);
61         return 0;
62 }
63
64 static int s3c24xx_gpiolib_bankf_toirq(struct gpio_chip *chip, unsigned offset)
65 {
66         if (offset < 4)
67                 return IRQ_EINT0 + offset;
68         
69         if (offset < 8)
70                 return IRQ_EINT4 + offset - 4;
71         
72         return -EINVAL;
73 }
74
75 static int s3c24xx_gpiolib_bankg_toirq(struct gpio_chip *chip, unsigned offset)
76 {
77         return IRQ_EINT8 + offset;
78 }
79
80 struct s3c_gpio_chip s3c24xx_gpios[] = {
81         [0] = {
82                 .base   = S3C2410_GPACON,
83                 .pm     = __gpio_pm(&s3c_gpio_pm_1bit),
84                 .chip   = {
85                         .base                   = S3C2410_GPA(0),
86                         .owner                  = THIS_MODULE,
87                         .label                  = "GPIOA",
88                         .ngpio                  = 24,
89                         .direction_input        = s3c24xx_gpiolib_banka_input,
90                         .direction_output       = s3c24xx_gpiolib_banka_output,
91                 },
92         },
93         [1] = {
94                 .base   = S3C2410_GPBCON,
95                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
96                 .chip   = {
97                         .base                   = S3C2410_GPB(0),
98                         .owner                  = THIS_MODULE,
99                         .label                  = "GPIOB",
100                         .ngpio                  = 16,
101                 },
102         },
103         [2] = {
104                 .base   = S3C2410_GPCCON,
105                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
106                 .chip   = {
107                         .base                   = S3C2410_GPC(0),
108                         .owner                  = THIS_MODULE,
109                         .label                  = "GPIOC",
110                         .ngpio                  = 16,
111                 },
112         },
113         [3] = {
114                 .base   = S3C2410_GPDCON,
115                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
116                 .chip   = {
117                         .base                   = S3C2410_GPD(0),
118                         .owner                  = THIS_MODULE,
119                         .label                  = "GPIOD",
120                         .ngpio                  = 16,
121                 },
122         },
123         [4] = {
124                 .base   = S3C2410_GPECON,
125                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
126                 .chip   = {
127                         .base                   = S3C2410_GPE(0),
128                         .label                  = "GPIOE",
129                         .owner                  = THIS_MODULE,
130                         .ngpio                  = 16,
131                 },
132         },
133         [5] = {
134                 .base   = S3C2410_GPFCON,
135                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
136                 .chip   = {
137                         .base                   = S3C2410_GPF(0),
138                         .owner                  = THIS_MODULE,
139                         .label                  = "GPIOF",
140                         .ngpio                  = 8,
141                         .to_irq                 = s3c24xx_gpiolib_bankf_toirq,
142                 },
143         },
144         [6] = {
145                 .base   = S3C2410_GPGCON,
146                 .pm     = __gpio_pm(&s3c_gpio_pm_2bit),
147                 .chip   = {
148                         .base                   = S3C2410_GPG(0),
149                         .owner                  = THIS_MODULE,
150                         .label                  = "GPIOG",
151                         .ngpio                  = 10,
152                         .to_irq                 = s3c24xx_gpiolib_bankg_toirq,
153                 },
154         },
155 };
156
157 static __init int s3c24xx_gpiolib_init(void)
158 {
159         struct s3c_gpio_chip *chip = s3c24xx_gpios;
160         int gpn;
161
162         for (gpn = 0; gpn < ARRAY_SIZE(s3c24xx_gpios); gpn++, chip++)
163                 s3c_gpiolib_add(chip);
164
165         return 0;
166 }
167
168 arch_initcall(s3c24xx_gpiolib_init);