]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/gpu/drm/nouveau/core/subdev/i2c/nv50.c
Merge tag 'v3.16-rc1' into i2c/for-next
[karo-tx-linux.git] / drivers / gpu / drm / nouveau / core / subdev / i2c / nv50.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
25 #include "nv50.h"
26
27 void
28 nv50_i2c_drive_scl(struct nouveau_i2c_port *base, int state)
29 {
30         struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine;
31         struct nv50_i2c_port *port = (void *)base;
32         if (state) port->state |= 0x01;
33         else       port->state &= 0xfe;
34         nv_wr32(priv, port->addr, port->state);
35 }
36
37 void
38 nv50_i2c_drive_sda(struct nouveau_i2c_port *base, int state)
39 {
40         struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine;
41         struct nv50_i2c_port *port = (void *)base;
42         if (state) port->state |= 0x02;
43         else       port->state &= 0xfd;
44         nv_wr32(priv, port->addr, port->state);
45 }
46
47 int
48 nv50_i2c_sense_scl(struct nouveau_i2c_port *base)
49 {
50         struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine;
51         struct nv50_i2c_port *port = (void *)base;
52         return !!(nv_rd32(priv, port->addr) & 0x00000001);
53 }
54
55 int
56 nv50_i2c_sense_sda(struct nouveau_i2c_port *base)
57 {
58         struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine;
59         struct nv50_i2c_port *port = (void *)base;
60         return !!(nv_rd32(priv, port->addr) & 0x00000002);
61 }
62
63 static const struct nouveau_i2c_func
64 nv50_i2c_func = {
65         .drive_scl = nv50_i2c_drive_scl,
66         .drive_sda = nv50_i2c_drive_sda,
67         .sense_scl = nv50_i2c_sense_scl,
68         .sense_sda = nv50_i2c_sense_sda,
69 };
70
71 const u32 nv50_i2c_addr[] = {
72         0x00e138, 0x00e150, 0x00e168, 0x00e180,
73         0x00e254, 0x00e274, 0x00e764, 0x00e780,
74         0x00e79c, 0x00e7b8
75 };
76 const int nv50_i2c_addr_nr = ARRAY_SIZE(nv50_i2c_addr);
77
78 static int
79 nv50_i2c_port_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
80                    struct nouveau_oclass *oclass, void *data, u32 index,
81                    struct nouveau_object **pobject)
82 {
83         struct dcb_i2c_entry *info = data;
84         struct nv50_i2c_port *port;
85         int ret;
86
87         ret = nouveau_i2c_port_create(parent, engine, oclass, index,
88                                       &nouveau_i2c_bit_algo, &nv50_i2c_func,
89                                       &port);
90         *pobject = nv_object(port);
91         if (ret)
92                 return ret;
93
94         if (info->drive >= nv50_i2c_addr_nr)
95                 return -EINVAL;
96
97         port->state = 0x00000007;
98         port->addr = nv50_i2c_addr[info->drive];
99         return 0;
100 }
101
102 int
103 nv50_i2c_port_init(struct nouveau_object *object)
104 {
105         struct nv50_i2c_priv *priv = (void *)object->engine;
106         struct nv50_i2c_port *port = (void *)object;
107         nv_wr32(priv, port->addr, port->state);
108         return nouveau_i2c_port_init(&port->base);
109 }
110
111 static struct nouveau_oclass
112 nv50_i2c_sclass[] = {
113         { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_BIT),
114           .ofuncs = &(struct nouveau_ofuncs) {
115                   .ctor = nv50_i2c_port_ctor,
116                   .dtor = _nouveau_i2c_port_dtor,
117                   .init = nv50_i2c_port_init,
118                   .fini = _nouveau_i2c_port_fini,
119           },
120         },
121         {}
122 };
123
124 struct nouveau_oclass *
125 nv50_i2c_oclass = &(struct nouveau_i2c_impl) {
126         .base.handle = NV_SUBDEV(I2C, 0x50),
127         .base.ofuncs = &(struct nouveau_ofuncs) {
128                 .ctor = _nouveau_i2c_ctor,
129                 .dtor = _nouveau_i2c_dtor,
130                 .init = _nouveau_i2c_init,
131                 .fini = _nouveau_i2c_fini,
132         },
133         .sclass = nv50_i2c_sclass,
134         .pad_x = &nv04_i2c_pad_oclass,
135 }.base;