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
|
/*-
* Copyright (c) 2016 Stanislav Galabov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/fdt/fdt_clock.h>
#include <mips/mediatek/mtk_sysctl.h>
#include "fdt_clock_if.h"
static const struct ofw_compat_data compat_data[] = {
{ "ralink,rt2880-clock", 1 },
/* Sentinel */
{ NULL, 0 }
};
static int
mtk_clock_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "MTK Clock Controller");
return (0);
}
static int
mtk_clock_attach(device_t dev)
{
if (device_get_unit(dev) != 0) {
device_printf(dev, "Only one clock control allowed\n");
return (ENXIO);
}
fdt_clock_register_provider(dev);
return (0);
}
#define CLOCK_ENABLE 1
#define CLOCK_DISABLE 0
static int
mtk_clock_set(device_t dev, int index, int value)
{
uint32_t mask;
/* Clock config register holds 32 clock gating bits */
if (index < 0 || index > 31)
return (EINVAL);
mask = (1u << index);
if (value == CLOCK_ENABLE)
mtk_sysctl_clr_set(SYSCTL_CLKCFG1, 0, mask);
else
mtk_sysctl_clr_set(SYSCTL_CLKCFG1, mask, 0);
return (0);
}
static int
mtk_clock_enable(device_t dev, int index)
{
return mtk_clock_set(dev, index, CLOCK_ENABLE);
}
static int
mtk_clock_disable(device_t dev, int index)
{
return mtk_clock_set(dev, index, CLOCK_DISABLE);
}
static int
mtk_clock_get_info(device_t dev, int index, struct fdt_clock_info *info)
{
uint32_t mask;
if (index < 0 || index > 31 || info == NULL)
return (EINVAL);
if (mtk_sysctl_get(SYSCTL_CLKCFG1) & mask)
info->flags = FDT_CIFLAG_RUNNING;
else
info->flags = 0;
return (0);
}
static device_method_t mtk_clock_methods[] = {
DEVMETHOD(device_probe, mtk_clock_probe),
DEVMETHOD(device_attach, mtk_clock_attach),
/* fdt_clock interface */
DEVMETHOD(fdt_clock_enable, mtk_clock_enable),
DEVMETHOD(fdt_clock_disable, mtk_clock_disable),
DEVMETHOD(fdt_clock_get_info, mtk_clock_get_info),
DEVMETHOD_END
};
static driver_t mtk_clock_driver = {
"clkctrl",
mtk_clock_methods,
0,
};
static devclass_t mtk_clock_devclass;
EARLY_DRIVER_MODULE(mtk_clock, simplebus, mtk_clock_driver, mtk_clock_devclass,
0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_EARLY);
MODULE_DEPEND(mtk_clock, mtk_sysctl, 1, 1, 1);
|
