Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / i2c / nv4e.c
1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs
23  */
24 #include "priv.h"
25
26 #include <subdev/vga.h>
27
28 struct nv4e_i2c_priv {
29         struct nvkm_i2c base;
30 };
31
32 struct nv4e_i2c_port {
33         struct nvkm_i2c_port base;
34         u32 addr;
35 };
36
37 static void
38 nv4e_i2c_drive_scl(struct nvkm_i2c_port *base, int state)
39 {
40         struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base);
41         struct nv4e_i2c_port *port = (void *)base;
42         nv_mask(priv, port->addr, 0x2f, state ? 0x21 : 0x01);
43 }
44
45 static void
46 nv4e_i2c_drive_sda(struct nvkm_i2c_port *base, int state)
47 {
48         struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base);
49         struct nv4e_i2c_port *port = (void *)base;
50         nv_mask(priv, port->addr, 0x1f, state ? 0x11 : 0x01);
51 }
52
53 static int
54 nv4e_i2c_sense_scl(struct nvkm_i2c_port *base)
55 {
56         struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base);
57         struct nv4e_i2c_port *port = (void *)base;
58         return !!(nv_rd32(priv, port->addr) & 0x00040000);
59 }
60
61 static int
62 nv4e_i2c_sense_sda(struct nvkm_i2c_port *base)
63 {
64         struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base);
65         struct nv4e_i2c_port *port = (void *)base;
66         return !!(nv_rd32(priv, port->addr) & 0x00080000);
67 }
68
69 static const struct nvkm_i2c_func
70 nv4e_i2c_func = {
71         .drive_scl = nv4e_i2c_drive_scl,
72         .drive_sda = nv4e_i2c_drive_sda,
73         .sense_scl = nv4e_i2c_sense_scl,
74         .sense_sda = nv4e_i2c_sense_sda,
75 };
76
77 static int
78 nv4e_i2c_port_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
79                    struct nvkm_oclass *oclass, void *data, u32 index,
80                    struct nvkm_object **pobject)
81 {
82         struct dcb_i2c_entry *info = data;
83         struct nv4e_i2c_port *port;
84         int ret;
85
86         ret = nvkm_i2c_port_create(parent, engine, oclass, index,
87                                    &nvkm_i2c_bit_algo, &nv4e_i2c_func, &port);
88         *pobject = nv_object(port);
89         if (ret)
90                 return ret;
91
92         port->addr = 0x600800 + info->drive;
93         return 0;
94 }
95
96 static struct nvkm_oclass
97 nv4e_i2c_sclass[] = {
98         { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NV4E_BIT),
99           .ofuncs = &(struct nvkm_ofuncs) {
100                   .ctor = nv4e_i2c_port_ctor,
101                   .dtor = _nvkm_i2c_port_dtor,
102                   .init = _nvkm_i2c_port_init,
103                   .fini = _nvkm_i2c_port_fini,
104           },
105         },
106         {}
107 };
108
109 struct nvkm_oclass *
110 nv4e_i2c_oclass = &(struct nvkm_i2c_impl) {
111         .base.handle = NV_SUBDEV(I2C, 0x4e),
112         .base.ofuncs = &(struct nvkm_ofuncs) {
113                 .ctor = _nvkm_i2c_ctor,
114                 .dtor = _nvkm_i2c_dtor,
115                 .init = _nvkm_i2c_init,
116                 .fini = _nvkm_i2c_fini,
117         },
118         .sclass = nv4e_i2c_sclass,
119         .pad_x = &nv04_i2c_pad_oclass,
120 }.base;