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-rw-r--r--arch/arm/plat-s3c24xx/Kconfig1
-rw-r--r--arch/arm/plat-s3c24xx/Makefile1
-rw-r--r--arch/arm/plat-s3c24xx/gpiolib.c259
-rw-r--r--include/asm-arm/arch-s3c2410/gpio.h74
4 files changed, 273 insertions, 62 deletions
diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig
index b66fb3c4e228..1521f1ce3b2b 100644
--- a/arch/arm/plat-s3c24xx/Kconfig
+++ b/arch/arm/plat-s3c24xx/Kconfig
@@ -9,6 +9,7 @@ config PLAT_S3C24XX
9 depends on ARCH_S3C2410 9 depends on ARCH_S3C2410
10 default y if ARCH_S3C2410 10 default y if ARCH_S3C2410
11 select NO_IOPORT 11 select NO_IOPORT
12 select HAVE_GPIO_LIB
12 help 13 help
13 Base platform code for any Samsung S3C24XX device 14 Base platform code for any Samsung S3C24XX device
14 15
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index 131d20237dd7..b91e62585684 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -16,6 +16,7 @@ obj-y += cpu.o
16obj-y += irq.o 16obj-y += irq.o
17obj-y += devs.o 17obj-y += devs.o
18obj-y += gpio.o 18obj-y += gpio.o
19obj-y += gpiolib.o
19obj-y += time.o 20obj-y += time.o
20obj-y += clock.o 21obj-y += clock.o
21 22
diff --git a/arch/arm/plat-s3c24xx/gpiolib.c b/arch/arm/plat-s3c24xx/gpiolib.c
new file mode 100644
index 000000000000..825d8d0c5ca2
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/gpiolib.c
@@ -0,0 +1,259 @@
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/ioport.h>
19#include <linux/io.h>
20#include <linux/gpio.h>
21
22#include <asm/hardware.h>
23#include <asm/irq.h>
24
25#include <asm/arch/regs-gpio.h>
26
27struct s3c24xx_gpio_chip {
28 struct gpio_chip chip;
29 void __iomem *base;
30};
31
32static inline struct s3c24xx_gpio_chip *to_s3c_chip(struct gpio_chip *gpc)
33{
34 return container_of(gpc, struct s3c24xx_gpio_chip, chip);
35}
36
37/* these routines are exported for use by other parts of the platform
38 * and system support, but are not intended to be used directly by the
39 * drivers themsevles.
40 */
41
42int s3c24xx_gpiolib_input(struct gpio_chip *chip, unsigned offset)
43{
44 struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
45 void __iomem *base = ourchip->base;
46 unsigned long flags;
47 unsigned long con;
48
49 local_irq_save(flags);
50
51 con = __raw_readl(base + 0x00);
52 con &= ~(3 << (offset * 2));
53 con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
54
55 __raw_writel(con, base + 0x00);
56
57 local_irq_restore(flags);
58 return 0;
59}
60
61int s3c24xx_gpiolib_output(struct gpio_chip *chip,
62 unsigned offset, int value)
63{
64 struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
65 void __iomem *base = ourchip->base;
66 unsigned long flags;
67 unsigned long dat;
68 unsigned long con;
69
70 local_irq_save(flags);
71
72 dat = __raw_readl(base + 0x04);
73 dat &= ~(1 << offset);
74 if (value)
75 dat |= 1 << offset;
76 __raw_writel(dat, base + 0x04);
77
78 con = __raw_readl(base + 0x00);
79 con &= ~(3 << (offset * 2));
80 con |= (S3C2410_GPIO_OUTPUT & 0xf) << (offset * 2);
81
82 __raw_writel(con, base + 0x00);
83 __raw_writel(dat, base + 0x04);
84
85 local_irq_restore(flags);
86 return 0;
87}
88
89void s3c24xx_gpiolib_set(struct gpio_chip *chip, unsigned offset, int value)
90{
91 struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
92 void __iomem *base = ourchip->base;
93 unsigned long flags;
94 unsigned long dat;
95
96 local_irq_save(flags);
97
98 dat = __raw_readl(base + 0x04);
99 dat &= ~(1 << offset);
100 if (value)
101 dat |= 1 << offset;
102 __raw_writel(dat, base + 0x04);
103
104 local_irq_restore(flags);
105}
106
107int s3c24xx_gpiolib_get(struct gpio_chip *chip, unsigned offset)
108{
109 struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
110 unsigned long val;
111
112 val = __raw_readl(ourchip->base + 0x04);
113 val >>= offset;
114 val &= 1;
115
116 return val;
117}
118
119static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
120{
121 return -EINVAL;
122}
123
124static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
125 unsigned offset, int value)
126{
127 struct s3c24xx_gpio_chip *ourchip = to_s3c_chip(chip);
128 void __iomem *base = ourchip->base;
129 unsigned long flags;
130 unsigned long dat;
131 unsigned long con;
132
133 local_irq_save(flags);
134
135 con = __raw_readl(base + 0x00);
136 dat = __raw_readl(base + 0x04);
137
138 dat &= ~(1 << offset);
139 if (value)
140 dat |= 1 << offset;
141
142 __raw_writel(dat, base + 0x04);
143
144 con &= ~(1 << offset);
145
146 __raw_writel(con, base + 0x00);
147 __raw_writel(dat, base + 0x04);
148
149 local_irq_restore(flags);
150 return 0;
151}
152
153
154struct s3c24xx_gpio_chip gpios[] = {
155 [0] = {
156 .base = S3C24XX_GPIO_BASE(S3C2410_GPA0),
157 .chip = {
158 .base = S3C2410_GPA0,
159 .owner = THIS_MODULE,
160 .label = "GPIOA",
161 .ngpio = 24,
162 .direction_input = s3c24xx_gpiolib_banka_input,
163 .direction_output = s3c24xx_gpiolib_banka_output,
164 .set = s3c24xx_gpiolib_set,
165 .get = s3c24xx_gpiolib_get,
166 },
167 },
168 [1] = {
169 .base = S3C24XX_GPIO_BASE(S3C2410_GPB0),
170 .chip = {
171 .base = S3C2410_GPB0,
172 .owner = THIS_MODULE,
173 .label = "GPIOB",
174 .ngpio = 16,
175 .direction_input = s3c24xx_gpiolib_input,
176 .direction_output = s3c24xx_gpiolib_output,
177 .set = s3c24xx_gpiolib_set,
178 .get = s3c24xx_gpiolib_get,
179 },
180 },
181 [2] = {
182 .base = S3C24XX_GPIO_BASE(S3C2410_GPC0),
183 .chip = {
184 .base = S3C2410_GPC0,
185 .owner = THIS_MODULE,
186 .label = "GPIOC",
187 .ngpio = 16,
188 .direction_input = s3c24xx_gpiolib_input,
189 .direction_output = s3c24xx_gpiolib_output,
190 .set = s3c24xx_gpiolib_set,
191 .get = s3c24xx_gpiolib_get,
192 },
193 },
194 [3] = {
195 .base = S3C24XX_GPIO_BASE(S3C2410_GPD0),
196 .chip = {
197 .base = S3C2410_GPD0,
198 .owner = THIS_MODULE,
199 .label = "GPIOD",
200 .ngpio = 16,
201 .direction_input = s3c24xx_gpiolib_input,
202 .direction_output = s3c24xx_gpiolib_output,
203 .set = s3c24xx_gpiolib_set,
204 .get = s3c24xx_gpiolib_get,
205 },
206 },
207 [4] = {
208 .base = S3C24XX_GPIO_BASE(S3C2410_GPE0),
209 .chip = {
210 .base = S3C2410_GPE0,
211 .label = "GPIOE",
212 .owner = THIS_MODULE,
213 .ngpio = 16,
214 .direction_input = s3c24xx_gpiolib_input,
215 .direction_output = s3c24xx_gpiolib_output,
216 .set = s3c24xx_gpiolib_set,
217 .get = s3c24xx_gpiolib_get,
218 },
219 },
220 [5] = {
221 .base = S3C24XX_GPIO_BASE(S3C2410_GPF0),
222 .chip = {
223 .base = S3C2410_GPF0,
224 .owner = THIS_MODULE,
225 .label = "GPIOF",
226 .ngpio = 8,
227 .direction_input = s3c24xx_gpiolib_input,
228 .direction_output = s3c24xx_gpiolib_output,
229 .set = s3c24xx_gpiolib_set,
230 .get = s3c24xx_gpiolib_get,
231 },
232 },
233 [6] = {
234 .base = S3C24XX_GPIO_BASE(S3C2410_GPG0),
235 .chip = {
236 .base = S3C2410_GPG0,
237 .owner = THIS_MODULE,
238 .label = "GPIOG",
239 .ngpio = 10,
240 .direction_input = s3c24xx_gpiolib_input,
241 .direction_output = s3c24xx_gpiolib_output,
242 .set = s3c24xx_gpiolib_set,
243 .get = s3c24xx_gpiolib_get,
244 },
245 },
246};
247
248static __init int s3c24xx_gpiolib_init(void)
249{
250 struct s3c24xx_gpio_chip *chip = gpios;
251 int gpn;
252
253 for (gpn = 0; gpn < ARRAY_SIZE(gpios); gpn++, chip++)
254 gpiochip_add(&chip->chip);
255
256 return 0;
257}
258
259arch_initcall(s3c24xx_gpiolib_init);
diff --git a/include/asm-arm/arch-s3c2410/gpio.h b/include/asm-arm/arch-s3c2410/gpio.h
index 7583895fd336..18e10d2c35ea 100644
--- a/include/asm-arm/arch-s3c2410/gpio.h
+++ b/include/asm-arm/arch-s3c2410/gpio.h
@@ -1,68 +1,18 @@
1/* 1/* linux/include/asm-arm/arch-s3c2410/gpio.h
2 * linux/include/asm-arm/arch-s3c2410/gpio.h
3 * 2 *
4 * S3C2410 GPIO wrappers for arch-neutral GPIO calls 3 * Copyright (c) 2008 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Ben Dooks <ben@simtec.co.uk>
5 * 6 *
6 * Written by Philipp Zabel <philipp.zabel@gmail.com> 7 * S3C2410 - GPIO lib support
7 * 8 *
8 * This program is free software; you can redistribute it and/or modify 9 * 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 * it under the terms of the GNU General Public License version 2 as
10 * the Free Software Foundation; either version 2 of the License, or 11 * published by the Free Software Foundation.
11 * (at your option) any later version. 12*/
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 */
23
24#ifndef __ASM_ARCH_S3C2410_GPIO_H
25#define __ASM_ARCH_S3C2410_GPIO_H
26
27#include <asm/irq.h>
28#include <asm/hardware.h>
29#include <asm/arch/regs-gpio.h>
30
31static inline int gpio_request(unsigned gpio, const char *label)
32{
33 return 0;
34}
35
36static inline void gpio_free(unsigned gpio)
37{
38 return;
39}
40
41static inline int gpio_direction_input(unsigned gpio)
42{
43 s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_INPUT);
44 return 0;
45}
46
47static inline int gpio_direction_output(unsigned gpio, int value)
48{
49 s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_OUTPUT);
50 /* REVISIT can we write the value first, to avoid glitching? */
51 s3c2410_gpio_setpin(gpio, value);
52 return 0;
53}
54
55#define gpio_get_value(gpio) s3c2410_gpio_getpin(gpio)
56#define gpio_set_value(gpio,value) s3c2410_gpio_setpin(gpio, value)
57
58#include <asm-generic/gpio.h> /* cansleep wrappers */
59
60#ifdef CONFIG_CPU_S3C2400
61#define gpio_to_irq(gpio) s3c2400_gpio_getirq(gpio)
62#else
63#define gpio_to_irq(gpio) s3c2410_gpio_getirq(gpio)
64#endif
65 13
66/* FIXME implement irq_to_gpio() */ 14#define gpio_get_value __gpio_get_value
15#define gpio_set_value __gpio_set_value
16#define gpio_cansleep __gpio_cansleep
67 17
68#endif 18#include <asm-generic/gpio.h>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 05:21:26 -0500