]>
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 * SPDX-License-Identifier: GPL-2.0+
12 #define CON_MASK(x) (0xf << ((x) << 2))
13 #define CON_SFR(x, v) ((v) << ((x) << 2))
15 #define DAT_MASK(x) (0x1 << (x))
16 #define DAT_SET(x) (0x1 << (x))
18 #define PULL_MASK(x) (0x3 << ((x) << 1))
19 #define PULL_MODE(x, v) ((v) << ((x) << 1))
21 #define DRV_MASK(x) (0x3 << ((x) << 1))
22 #define DRV_SET(x, m) ((m) << ((x) << 1))
23 #define RATE_MASK(x) (0x1 << (x + 16))
24 #define RATE_SET(x) (0x1 << (x + 16))
26 void s5p_gpio_cfg_pin(struct s5p_gpio_bank
*bank
, int gpio
, int cfg
)
30 value
= readl(&bank
->con
);
31 value
&= ~CON_MASK(gpio
);
32 value
|= CON_SFR(gpio
, cfg
);
33 writel(value
, &bank
->con
);
36 void s5p_gpio_direction_output(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
38 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_OUTPUT
);
39 s5p_gpio_set_value(bank
, gpio
, en
);
42 void s5p_gpio_direction_input(struct s5p_gpio_bank
*bank
, int gpio
)
44 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_INPUT
);
47 void s5p_gpio_set_value(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
51 value
= readl(&bank
->dat
);
52 value
&= ~DAT_MASK(gpio
);
54 value
|= DAT_SET(gpio
);
55 writel(value
, &bank
->dat
);
58 unsigned int s5p_gpio_get_value(struct s5p_gpio_bank
*bank
, int gpio
)
62 value
= readl(&bank
->dat
);
63 return !!(value
& DAT_MASK(gpio
));
66 void s5p_gpio_set_pull(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
70 value
= readl(&bank
->pull
);
71 value
&= ~PULL_MASK(gpio
);
76 value
|= PULL_MODE(gpio
, mode
);
82 writel(value
, &bank
->pull
);
85 void s5p_gpio_set_drv(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
89 value
= readl(&bank
->drv
);
90 value
&= ~DRV_MASK(gpio
);
97 value
|= DRV_SET(gpio
, mode
);
103 writel(value
, &bank
->drv
);
106 void s5p_gpio_set_rate(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
110 value
= readl(&bank
->drv
);
111 value
&= ~RATE_MASK(gpio
);
116 value
|= RATE_SET(gpio
);
122 writel(value
, &bank
->drv
);
125 struct s5p_gpio_bank
*s5p_gpio_get_bank(unsigned gpio
)
128 unsigned g
= gpio
- s5p_gpio_part_max(gpio
);
130 bank
= g
/ GPIO_PER_BANK
;
131 bank
*= sizeof(struct s5p_gpio_bank
);
132 return (struct s5p_gpio_bank
*) (s5p_gpio_base(gpio
) + bank
);
135 int s5p_gpio_get_pin(unsigned gpio
)
137 return gpio
% GPIO_PER_BANK
;
140 /* Common GPIO API */
142 int gpio_request(unsigned gpio
, const char *label
)
147 int gpio_free(unsigned gpio
)
152 int gpio_direction_input(unsigned gpio
)
154 s5p_gpio_direction_input(s5p_gpio_get_bank(gpio
),
155 s5p_gpio_get_pin(gpio
));
159 int gpio_direction_output(unsigned gpio
, int value
)
161 s5p_gpio_direction_output(s5p_gpio_get_bank(gpio
),
162 s5p_gpio_get_pin(gpio
), value
);
166 int gpio_get_value(unsigned gpio
)
168 return (int) s5p_gpio_get_value(s5p_gpio_get_bank(gpio
),
169 s5p_gpio_get_pin(gpio
));
172 int gpio_set_value(unsigned gpio
, int value
)
174 s5p_gpio_set_value(s5p_gpio_get_bank(gpio
),
175 s5p_gpio_get_pin(gpio
), value
);