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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/gpio/s5p_gpio.c
2 * (C) Copyright 2009 Samsung Electronics
3 * Minkyu Kang <mk7.kang@samsung.com>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 #include <asm/arch/gpio.h>
25 #define CON_MASK(x) (0xf << ((x) << 2))
26 #define CON_SFR(x, v) ((v) << ((x) << 2))
28 #define DAT_MASK(x) (0x1 << (x))
29 #define DAT_SET(x) (0x1 << (x))
31 #define PULL_MASK(x) (0x3 << ((x) << 1))
32 #define PULL_MODE(x, v) ((v) << ((x) << 1))
34 #define DRV_MASK(x) (0x3 << ((x) << 1))
35 #define DRV_SET(x, m) ((m) << ((x) << 1))
36 #define RATE_MASK(x) (0x1 << (x + 16))
37 #define RATE_SET(x) (0x1 << (x + 16))
39 void s5p_gpio_cfg_pin(struct s5p_gpio_bank
*bank
, int gpio
, int cfg
)
43 value
= readl(&bank
->con
);
44 value
&= ~CON_MASK(gpio
);
45 value
|= CON_SFR(gpio
, cfg
);
46 writel(value
, &bank
->con
);
49 void s5p_gpio_direction_output(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
53 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_OUTPUT
);
55 value
= readl(&bank
->dat
);
56 value
&= ~DAT_MASK(gpio
);
58 value
|= DAT_SET(gpio
);
59 writel(value
, &bank
->dat
);
62 void s5p_gpio_direction_input(struct s5p_gpio_bank
*bank
, int gpio
)
64 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_INPUT
);
67 void s5p_gpio_set_value(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
71 value
= readl(&bank
->dat
);
72 value
&= ~DAT_MASK(gpio
);
74 value
|= DAT_SET(gpio
);
75 writel(value
, &bank
->dat
);
78 unsigned int s5p_gpio_get_value(struct s5p_gpio_bank
*bank
, int gpio
)
82 value
= readl(&bank
->dat
);
83 return !!(value
& DAT_MASK(gpio
));
86 void s5p_gpio_set_pull(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
90 value
= readl(&bank
->pull
);
91 value
&= ~PULL_MASK(gpio
);
96 value
|= PULL_MODE(gpio
, mode
);
102 writel(value
, &bank
->pull
);
105 void s5p_gpio_set_drv(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
109 value
= readl(&bank
->drv
);
110 value
&= ~DRV_MASK(gpio
);
117 value
|= DRV_SET(gpio
, mode
);
123 writel(value
, &bank
->drv
);
126 void s5p_gpio_set_rate(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
130 value
= readl(&bank
->drv
);
131 value
&= ~RATE_MASK(gpio
);
136 value
|= RATE_SET(gpio
);
142 writel(value
, &bank
->drv
);
145 struct s5p_gpio_bank
*s5p_gpio_get_bank(int nr
)
147 int bank
= nr
/ GPIO_PER_BANK
;
148 bank
*= sizeof(struct s5p_gpio_bank
);
150 return (struct s5p_gpio_bank
*) (s5p_gpio_base(nr
) + bank
);
153 int s5p_gpio_get_pin(int nr
)
155 return nr
% GPIO_PER_BANK
;
158 int gpio_request(int gpio
, const char *label
)
163 int gpio_direction_input(int nr
)
165 s5p_gpio_direction_input(s5p_gpio_get_bank(nr
),
166 s5p_gpio_get_pin(nr
));
170 int gpio_direction_output(int nr
, int value
)
172 s5p_gpio_direction_output(s5p_gpio_get_bank(nr
),
173 s5p_gpio_get_pin(nr
), value
);
177 int gpio_get_value(int nr
)
179 return (int) s5p_gpio_get_value(s5p_gpio_get_bank(nr
),
180 s5p_gpio_get_pin(nr
));
183 void gpio_set_value(int nr
, int value
)
185 s5p_gpio_set_value(s5p_gpio_get_bank(nr
),
186 s5p_gpio_get_pin(nr
), value
);