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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 DENX Software Engineering
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
*/
#include <common.h>
#include <log.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <linux/io.h>
#include <linux/err.h>
#include <dm.h>
#include <dm/pinctrl.h>
#include <dm/read.h>
#include "pinctrl-mxs.h"
DECLARE_GLOBAL_DATA_PTR;
struct mxs_pinctrl_priv {
void __iomem *base;
const struct mxs_regs *regs;
};
static unsigned long mxs_dt_node_to_map(struct udevice *conf)
{
unsigned long config = 0;
int ret;
u32 val;
ret = dev_read_u32(conf, "fsl,drive-strength", &val);
if (!ret)
config = val | MA_PRESENT;
ret = dev_read_u32(conf, "fsl,voltage", &val);
if (!ret)
config |= val << VOL_SHIFT | VOL_PRESENT;
ret = dev_read_u32(conf, "fsl,pull-up", &val);
if (!ret)
config |= val << PULL_SHIFT | PULL_PRESENT;
return config;
}
static int mxs_pinctrl_set_mux(struct udevice *dev, u32 val, int bank, int pin)
{
struct mxs_pinctrl_priv *iomux = dev_get_priv(dev);
int muxsel = MUXID_TO_MUXSEL(val), shift;
void __iomem *reg;
reg = iomux->base + iomux->regs->muxsel;
reg += bank * 0x20 + pin / 16 * 0x10;
shift = pin % 16 * 2;
mxs_pinctrl_rmwl(muxsel, 0x3, shift, reg);
debug(" mux %d,", muxsel);
return 0;
}
static int mxs_pinctrl_set_state(struct udevice *dev, struct udevice *conf)
{
struct mxs_pinctrl_priv *iomux = dev_get_priv(dev);
u32 *pin_data, val, ma, vol, pull;
int npins, size, i, ret;
unsigned long config;
debug("\n%s: set state: %s\n", __func__, conf->name);
size = dev_read_size(conf, "fsl,pinmux-ids");
if (size < 0)
return size;
if (!size || size % sizeof(int)) {
dev_err(dev, "Invalid fsl,pinmux-ids property in %s\n",
conf->name);
return -EINVAL;
}
npins = size / sizeof(int);
pin_data = devm_kzalloc(dev, size, 0);
if (!pin_data)
return -ENOMEM;
ret = dev_read_u32_array(conf, "fsl,pinmux-ids", pin_data, npins);
if (ret) {
dev_err(dev, "Error reading pin data.\n");
devm_kfree(dev, pin_data);
return -EINVAL;
}
config = mxs_dt_node_to_map(conf);
ma = CONFIG_TO_MA(config);
vol = CONFIG_TO_VOL(config);
pull = CONFIG_TO_PULL(config);
for (i = 0; i < npins; i++) {
int pinid, bank, pin, shift;
void __iomem *reg;
val = pin_data[i];
pinid = MUXID_TO_PINID(val);
bank = PINID_TO_BANK(pinid);
pin = PINID_TO_PIN(pinid);
debug("(val: 0x%x) pin %d,", val, pinid);
/* Setup pinmux */
mxs_pinctrl_set_mux(dev, val, bank, pin);
debug(" ma: %d, vol: %d, pull: %d\n", ma, vol, pull);
/* drive */
reg = iomux->base + iomux->regs->drive;
reg += bank * 0x40 + pin / 8 * 0x10;
/* mA */
if (config & MA_PRESENT) {
shift = pin % 8 * 4;
mxs_pinctrl_rmwl(ma, 0x3, shift, reg);
}
/* vol */
if (config & VOL_PRESENT) {
shift = pin % 8 * 4 + 2;
if (vol)
writel(1 << shift, reg + SET);
else
writel(1 << shift, reg + CLR);
}
/* pull */
if (config & PULL_PRESENT) {
reg = iomux->base + iomux->regs->pull;
reg += bank * 0x10;
shift = pin;
if (pull)
writel(1 << shift, reg + SET);
else
writel(1 << shift, reg + CLR);
}
}
devm_kfree(dev, pin_data);
return 0;
}
static struct pinctrl_ops mxs_pinctrl_ops = {
.set_state = mxs_pinctrl_set_state,
};
static int mxs_pinctrl_probe(struct udevice *dev)
{
struct mxs_pinctrl_priv *iomux = dev_get_priv(dev);
iomux->base = dev_read_addr_ptr(dev);
iomux->regs = (struct mxs_regs *)dev_get_driver_data(dev);
return 0;
}
static const struct mxs_regs imx23_regs = {
.muxsel = 0x100,
.drive = 0x200,
.pull = 0x400,
};
static const struct mxs_regs imx28_regs = {
.muxsel = 0x100,
.drive = 0x300,
.pull = 0x600,
};
static const struct udevice_id mxs_pinctrl_match[] = {
{ .compatible = "fsl,imx23-pinctrl", .data = (ulong)&imx23_regs },
{ .compatible = "fsl,imx28-pinctrl", .data = (ulong)&imx28_regs },
{ /* sentinel */ }
};
U_BOOT_DRIVER(mxs_pinctrl) = {
.name = "mxs-pinctrl",
.id = UCLASS_PINCTRL,
.of_match = of_match_ptr(mxs_pinctrl_match),
.probe = mxs_pinctrl_probe,
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
.bind = dm_scan_fdt_dev,
#endif
.priv_auto_alloc_size = sizeof(struct mxs_pinctrl_priv),
.ops = &mxs_pinctrl_ops,
};
|
