1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Basic memory-mapped GPIO controllers.
*
* Based on linux driver by:
* Copyright 2008 MontaVista Software, Inc.
* Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef __BASIC_MMIO_GPIO_H
#define __BASIC_MMIO_GPIO_H
#include <common.h>
#include <gpio.h>
#include <io.h>
struct bgpio_pdata {
int base;
int ngpio;
};
struct bgpio_chip {
struct gpio_chip gc;
struct gpio_ops ops;
unsigned int (*read_reg)(void __iomem *reg);
void (*write_reg)(void __iomem *reg, unsigned int data);
void __iomem *reg_dat;
void __iomem *reg_set;
void __iomem *reg_clr;
void __iomem *reg_dir;
/* Number of bits (GPIOs): <register width> * 8. */
int bits;
/*
* Some GPIO controllers work with the big-endian bits notation,
* e.g. in a 8-bits register, GPIO7 is the least significant bit.
*/
unsigned int (*pin2mask)(struct bgpio_chip *bgc, unsigned int pin);
/* Shadowed data register to clear/set bits safely. */
unsigned int data;
/* Shadowed direction registers to clear/set direction safely. */
unsigned int dir;
};
static inline struct bgpio_chip *to_bgpio_chip(struct gpio_chip *gc)
{
return container_of(gc, struct bgpio_chip, gc);
}
int bgpio_init(struct bgpio_chip *bgc, struct device_d *dev,
unsigned int sz, void __iomem *dat, void __iomem *set,
void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
unsigned long flags);
void bgpio_remove(struct bgpio_chip *bgc);
#define BGPIOF_BIG_ENDIAN BIT(0)
#define BGPIOF_UNREADABLE_REG_SET BIT(1) /* reg_set is unreadable */
#define BGPIOF_UNREADABLE_REG_DIR BIT(2) /* reg_dir is unreadable */
#endif /* __BASIC_MMIO_GPIO_H */
|
