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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 * SPDX-License-Identifier: GPL-2.0+
12 #define S5P_GPIO_GET_BANK(x) ((x >> S5P_GPIO_BANK_SHIFT) \
15 #define S5P_GPIO_GET_PIN(x) (x & S5P_GPIO_PIN_MASK)
17 #define CON_MASK(x) (0xf << ((x) << 2))
18 #define CON_SFR(x, v) ((v) << ((x) << 2))
20 #define DAT_MASK(x) (0x1 << (x))
21 #define DAT_SET(x) (0x1 << (x))
23 #define PULL_MASK(x) (0x3 << ((x) << 1))
24 #define PULL_MODE(x, v) ((v) << ((x) << 1))
26 #define DRV_MASK(x) (0x3 << ((x) << 1))
27 #define DRV_SET(x, m) ((m) << ((x) << 1))
28 #define RATE_MASK(x) (0x1 << (x + 16))
29 #define RATE_SET(x) (0x1 << (x + 16))
31 void s5p_gpio_cfg_pin(struct s5p_gpio_bank
*bank
, int gpio
, int cfg
)
35 value
= readl(&bank
->con
);
36 value
&= ~CON_MASK(gpio
);
37 value
|= CON_SFR(gpio
, cfg
);
38 writel(value
, &bank
->con
);
41 void s5p_gpio_direction_output(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
43 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_OUTPUT
);
44 s5p_gpio_set_value(bank
, gpio
, en
);
47 void s5p_gpio_direction_input(struct s5p_gpio_bank
*bank
, int gpio
)
49 s5p_gpio_cfg_pin(bank
, gpio
, GPIO_INPUT
);
52 void s5p_gpio_set_value(struct s5p_gpio_bank
*bank
, int gpio
, int en
)
56 value
= readl(&bank
->dat
);
57 value
&= ~DAT_MASK(gpio
);
59 value
|= DAT_SET(gpio
);
60 writel(value
, &bank
->dat
);
63 unsigned int s5p_gpio_get_value(struct s5p_gpio_bank
*bank
, int gpio
)
67 value
= readl(&bank
->dat
);
68 return !!(value
& DAT_MASK(gpio
));
71 void s5p_gpio_set_pull(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
75 value
= readl(&bank
->pull
);
76 value
&= ~PULL_MASK(gpio
);
81 value
|= PULL_MODE(gpio
, mode
);
87 writel(value
, &bank
->pull
);
90 void s5p_gpio_set_drv(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
94 value
= readl(&bank
->drv
);
95 value
&= ~DRV_MASK(gpio
);
102 value
|= DRV_SET(gpio
, mode
);
108 writel(value
, &bank
->drv
);
111 void s5p_gpio_set_rate(struct s5p_gpio_bank
*bank
, int gpio
, int mode
)
115 value
= readl(&bank
->drv
);
116 value
&= ~RATE_MASK(gpio
);
121 value
|= RATE_SET(gpio
);
127 writel(value
, &bank
->drv
);
130 struct s5p_gpio_bank
*s5p_gpio_get_bank(unsigned gpio
)
132 unsigned bank
= S5P_GPIO_GET_BANK(gpio
);
133 unsigned base
= s5p_gpio_base(gpio
);
135 return (struct s5p_gpio_bank
*)(base
+ bank
);
138 int s5p_gpio_get_pin(unsigned gpio
)
140 return S5P_GPIO_GET_PIN(gpio
);
143 /* Common GPIO API */
145 int gpio_request(unsigned gpio
, const char *label
)
150 int gpio_free(unsigned gpio
)
155 int gpio_direction_input(unsigned gpio
)
157 s5p_gpio_direction_input(s5p_gpio_get_bank(gpio
),
158 s5p_gpio_get_pin(gpio
));
162 int gpio_direction_output(unsigned gpio
, int value
)
164 s5p_gpio_direction_output(s5p_gpio_get_bank(gpio
),
165 s5p_gpio_get_pin(gpio
), value
);
169 int gpio_get_value(unsigned gpio
)
171 return (int) s5p_gpio_get_value(s5p_gpio_get_bank(gpio
),
172 s5p_gpio_get_pin(gpio
));
175 int gpio_set_value(unsigned gpio
, int value
)
177 s5p_gpio_set_value(s5p_gpio_get_bank(gpio
),
178 s5p_gpio_get_pin(gpio
), value
);