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1 /*
2 * arch/asm-arm/mach-kirkwood/include/mach/gpio.h
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7 /*
8 * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
9 * Removed kernel level irq handling. Took some macros from kernel to
10 * allow build.
11 *
12 * Dieter Kiermaier dk-arm-linux@gmx.de
13 */
14
15 #ifndef __KIRKWOOD_GPIO_H
16 #define __KIRKWOOD_GPIO_H
17
18 /* got from kernel include/linux/bitops.h */
19 #define BITS_PER_BYTE 8
20 #define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
21
22 #define GPIO_MAX 50
23 #define GPIO_OFF(pin) (((pin) >> 5) ? 0x0040 : 0x0000)
24 #define GPIO_OUT(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x00)
25 #define GPIO_IO_CONF(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x04)
26 #define GPIO_BLINK_EN(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x08)
27 #define GPIO_IN_POL(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x0c)
28 #define GPIO_DATA_IN(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x10)
29 #define GPIO_EDGE_CAUSE(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x14)
30 #define GPIO_EDGE_MASK(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x18)
31 #define GPIO_LEVEL_MASK(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x1c)
32
33 /*
34 * Kirkwood-specific GPIO API
35 */
36
37 void kw_gpio_set_valid(unsigned pin, int mode);
38 int kw_gpio_is_valid(unsigned pin, int mode);
39 int kw_gpio_direction_input(unsigned pin);
40 int kw_gpio_direction_output(unsigned pin, int value);
41 int kw_gpio_get_value(unsigned pin);
42 void kw_gpio_set_value(unsigned pin, int value);
43 void kw_gpio_set_blink(unsigned pin, int blink);
44 void kw_gpio_set_unused(unsigned pin);
45
46 #define GPIO_INPUT_OK (1 << 0)
47 #define GPIO_OUTPUT_OK (1 << 1)
48
49 #endif