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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2016,2017 Antony Pavlov <antonynpavlov@gmail.com>
/*
* libftdi1 sandbox barebox GPIO driver
*/
#include <common.h>
#include <errno.h>
#include <gpio.h>
#include <init.h>
#include <malloc.h>
#include <mach/linux.h>
struct libftdi1_gpio_chip {
struct gpio_chip chip;
struct ft2232_bitbang *ftbb;
};
static int libftdi1_gpio_direction_input(struct gpio_chip *chip, unsigned off)
{
struct libftdi1_gpio_chip *gpio =
container_of(chip, struct libftdi1_gpio_chip, chip);
barebox_libftdi1_gpio_direction(gpio->ftbb, off, GPIOF_DIR_IN);
barebox_libftdi1_update(gpio->ftbb);
return 0;
}
static int libftdi1_gpio_direction_output(
struct gpio_chip *chip, unsigned off, int value)
{
struct libftdi1_gpio_chip *gpio =
container_of(chip, struct libftdi1_gpio_chip, chip);
barebox_libftdi1_gpio_set_value(gpio->ftbb, off, value);
barebox_libftdi1_gpio_direction(gpio->ftbb, off, GPIOF_DIR_OUT);
barebox_libftdi1_update(gpio->ftbb);
return 0;
}
static int libftdi1_gpio_get_value(struct gpio_chip *chip, unsigned off)
{
struct libftdi1_gpio_chip *gpio =
container_of(chip, struct libftdi1_gpio_chip, chip);
return barebox_libftdi1_gpio_get_value(gpio->ftbb, off);
}
static void libftdi1_gpio_set_value(
struct gpio_chip *chip, unsigned off, int value)
{
struct libftdi1_gpio_chip *gpio =
container_of(chip, struct libftdi1_gpio_chip, chip);
barebox_libftdi1_gpio_set_value(gpio->ftbb, off, value);
barebox_libftdi1_update(gpio->ftbb);
}
static struct gpio_ops libftdi1_gpio_ops = {
.direction_input = libftdi1_gpio_direction_input,
.direction_output = libftdi1_gpio_direction_output,
.get = libftdi1_gpio_get_value,
.set = libftdi1_gpio_set_value,
};
static int libftdi1_gpio_probe(struct device_d *dev)
{
struct libftdi1_gpio_chip *gpio;
struct ft2232_bitbang *ftbb;
int ret;
uint32_t id_vendor, id_product;
const char *i_serial_number = NULL;
of_property_read_u32(dev->of_node, "usb,id_vendor",
&id_vendor);
of_property_read_u32(dev->of_node, "usb,id_product",
&id_product);
of_property_read_string(dev->of_node, "usb,i_serial_number",
&i_serial_number);
ftbb = barebox_libftdi1_open(id_vendor, id_product,
i_serial_number);
if (!ftbb)
return -EIO;
gpio = xzalloc(sizeof(*gpio));
gpio->ftbb = ftbb;
gpio->chip.dev = dev;
gpio->chip.ops = &libftdi1_gpio_ops;
gpio->chip.base = 0;
gpio->chip.ngpio = 8;
ret = gpiochip_add(&gpio->chip);
dev_dbg(dev, "%d: probed gpio%d with base %d\n",
ret, dev->id, gpio->chip.base);
return 0;
}
static __maybe_unused const struct of_device_id libftdi1_gpio_dt_ids[] = {
{
.compatible = "barebox,libftdi1-gpio",
}, {
/* sentinel */
},
};
static void libftdi1_gpio_remove(struct device_d *dev)
{
barebox_libftdi1_close();
}
static struct driver_d libftdi1_gpio_driver = {
.name = "libftdi1-gpio",
.probe = libftdi1_gpio_probe,
.remove = libftdi1_gpio_remove,
.of_compatible = DRV_OF_COMPAT(libftdi1_gpio_dt_ids),
};
device_platform_driver(libftdi1_gpio_driver);
|
