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
128
129
130
131
132
133
134
135
136
137
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015
* Bhuvanchandra DV, Toradex, Inc.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <asm/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/io.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
struct vybrid_gpios {
unsigned int chip;
struct vybrid_gpio_regs *reg;
};
static int vybrid_gpio_direction_input(struct udevice *dev, unsigned gpio)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_IN);
return 0;
}
static int vybrid_gpio_direction_output(struct udevice *dev, unsigned gpio,
int value)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
gpio_set_value(gpio, value);
imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_OUT);
return 0;
}
static int vybrid_gpio_get_value(struct udevice *dev, unsigned gpio)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
return ((readl(&gpios->reg->gpio_pdir) & (1 << gpio))) ? 1 : 0;
}
static int vybrid_gpio_set_value(struct udevice *dev, unsigned gpio,
int value)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
if (value)
writel((1 << gpio), &gpios->reg->gpio_psor);
else
writel((1 << gpio), &gpios->reg->gpio_pcor);
return 0;
}
static int vybrid_gpio_get_function(struct udevice *dev, unsigned gpio)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
u32 g_state = 0;
gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
imx_iomux_gpio_get_function(gpio, &g_state);
if (((g_state & (0x07 << PAD_MUX_MODE_SHIFT)) >> PAD_MUX_MODE_SHIFT) > 0)
return GPIOF_FUNC;
if (g_state & PAD_CTL_OBE_ENABLE)
return GPIOF_OUTPUT;
if (g_state & PAD_CTL_IBE_ENABLE)
return GPIOF_INPUT;
if (!(g_state & PAD_CTL_OBE_IBE_ENABLE))
return GPIOF_UNUSED;
return GPIOF_UNKNOWN;
}
static const struct dm_gpio_ops gpio_vybrid_ops = {
.direction_input = vybrid_gpio_direction_input,
.direction_output = vybrid_gpio_direction_output,
.get_value = vybrid_gpio_get_value,
.set_value = vybrid_gpio_set_value,
.get_function = vybrid_gpio_get_function,
};
static int vybrid_gpio_probe(struct udevice *dev)
{
struct vybrid_gpios *gpios = dev_get_priv(dev);
struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
uc_priv->bank_name = plat->port_name;
uc_priv->gpio_count = VYBRID_GPIO_COUNT;
gpios->reg = (struct vybrid_gpio_regs *)plat->base;
gpios->chip = plat->chip;
return 0;
}
static int vybrid_gpio_odata_to_platdata(struct udevice *dev)
{
struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
fdt_addr_t base_addr;
base_addr = dev_read_addr(dev);
if (base_addr == FDT_ADDR_T_NONE)
return -EINVAL;
plat->base = base_addr;
plat->chip = dev->req_seq;
plat->port_name = fdt_get_name(gd->fdt_blob, dev_of_offset(dev), NULL);
return 0;
}
static const struct udevice_id vybrid_gpio_ids[] = {
{ .compatible = "fsl,vf610-gpio" },
{ }
};
U_BOOT_DRIVER(gpio_vybrid) = {
.name = "gpio_vybrid",
.id = UCLASS_GPIO,
.ops = &gpio_vybrid_ops,
.of_match = vybrid_gpio_ids,
.ofdata_to_platdata = vybrid_gpio_odata_to_platdata,
.probe = vybrid_gpio_probe,
.priv_auto_alloc_size = sizeof(struct vybrid_gpios),
.platdata_auto_alloc_size = sizeof(struct vybrid_gpio_platdata),
};
|
