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
|
/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "nv50.h"
void
nv50_i2c_drive_scl(struct nvkm_i2c_port *base, int state)
{
struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
struct nv50_i2c_port *port = (void *)base;
if (state) port->state |= 0x01;
else port->state &= 0xfe;
nv_wr32(priv, port->addr, port->state);
}
void
nv50_i2c_drive_sda(struct nvkm_i2c_port *base, int state)
{
struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
struct nv50_i2c_port *port = (void *)base;
if (state) port->state |= 0x02;
else port->state &= 0xfd;
nv_wr32(priv, port->addr, port->state);
}
int
nv50_i2c_sense_scl(struct nvkm_i2c_port *base)
{
struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
struct nv50_i2c_port *port = (void *)base;
return !!(nv_rd32(priv, port->addr) & 0x00000001);
}
int
nv50_i2c_sense_sda(struct nvkm_i2c_port *base)
{
struct nv50_i2c_priv *priv = (void *)nvkm_i2c(base);
struct nv50_i2c_port *port = (void *)base;
return !!(nv_rd32(priv, port->addr) & 0x00000002);
}
static const struct nvkm_i2c_func
nv50_i2c_func = {
.drive_scl = nv50_i2c_drive_scl,
.drive_sda = nv50_i2c_drive_sda,
.sense_scl = nv50_i2c_sense_scl,
.sense_sda = nv50_i2c_sense_sda,
};
const u32 nv50_i2c_addr[] = {
0x00e138, 0x00e150, 0x00e168, 0x00e180,
0x00e254, 0x00e274, 0x00e764, 0x00e780,
0x00e79c, 0x00e7b8
};
const int nv50_i2c_addr_nr = ARRAY_SIZE(nv50_i2c_addr);
static int
nv50_i2c_port_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
struct nvkm_oclass *oclass, void *data, u32 index,
struct nvkm_object **pobject)
{
struct dcb_i2c_entry *info = data;
struct nv50_i2c_port *port;
int ret;
ret = nvkm_i2c_port_create(parent, engine, oclass, index,
&nvkm_i2c_bit_algo, &nv50_i2c_func, &port);
*pobject = nv_object(port);
if (ret)
return ret;
if (info->drive >= nv50_i2c_addr_nr)
return -EINVAL;
port->state = 0x00000007;
port->addr = nv50_i2c_addr[info->drive];
return 0;
}
int
nv50_i2c_port_init(struct nvkm_object *object)
{
struct nv50_i2c_priv *priv = (void *)nvkm_i2c(object);
struct nv50_i2c_port *port = (void *)object;
nv_wr32(priv, port->addr, port->state);
return nvkm_i2c_port_init(&port->base);
}
static struct nvkm_oclass
nv50_i2c_sclass[] = {
{ .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_BIT),
.ofuncs = &(struct nvkm_ofuncs) {
.ctor = nv50_i2c_port_ctor,
.dtor = _nvkm_i2c_port_dtor,
.init = nv50_i2c_port_init,
.fini = _nvkm_i2c_port_fini,
},
},
{}
};
struct nvkm_oclass *
nv50_i2c_oclass = &(struct nvkm_i2c_impl) {
.base.handle = NV_SUBDEV(I2C, 0x50),
.base.ofuncs = &(struct nvkm_ofuncs) {
.ctor = _nvkm_i2c_ctor,
.dtor = _nvkm_i2c_dtor,
.init = _nvkm_i2c_init,
.fini = _nvkm_i2c_fini,
},
.sclass = nv50_i2c_sclass,
.pad_x = &nv04_i2c_pad_oclass,
}.base;
|
