1 | /* $NetBSD: nouveau_subdev_i2c_nv50.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2012 Red Hat Inc. |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a |
7 | * copy of this software and associated documentation files (the "Software"), |
8 | * to deal in the Software without restriction, including without limitation |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
10 | * and/or sell copies of the Software, and to permit persons to whom the |
11 | * Software is furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
22 | * OTHER DEALINGS IN THE SOFTWARE. |
23 | * |
24 | * Authors: Ben Skeggs |
25 | */ |
26 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_i2c_nv50.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $" ); |
29 | |
30 | #include "nv50.h" |
31 | |
32 | void |
33 | nv50_i2c_drive_scl(struct nouveau_i2c_port *base, int state) |
34 | { |
35 | struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine; |
36 | struct nv50_i2c_port *port = (void *)base; |
37 | if (state) port->state |= 0x01; |
38 | else port->state &= 0xfe; |
39 | nv_wr32(priv, port->addr, port->state); |
40 | } |
41 | |
42 | void |
43 | nv50_i2c_drive_sda(struct nouveau_i2c_port *base, int state) |
44 | { |
45 | struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine; |
46 | struct nv50_i2c_port *port = (void *)base; |
47 | if (state) port->state |= 0x02; |
48 | else port->state &= 0xfd; |
49 | nv_wr32(priv, port->addr, port->state); |
50 | } |
51 | |
52 | int |
53 | nv50_i2c_sense_scl(struct nouveau_i2c_port *base) |
54 | { |
55 | struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine; |
56 | struct nv50_i2c_port *port = (void *)base; |
57 | return !!(nv_rd32(priv, port->addr) & 0x00000001); |
58 | } |
59 | |
60 | int |
61 | nv50_i2c_sense_sda(struct nouveau_i2c_port *base) |
62 | { |
63 | struct nv50_i2c_priv *priv = (void *)nv_object(base)->engine; |
64 | struct nv50_i2c_port *port = (void *)base; |
65 | return !!(nv_rd32(priv, port->addr) & 0x00000002); |
66 | } |
67 | |
68 | static const struct nouveau_i2c_func |
69 | nv50_i2c_func = { |
70 | .drive_scl = nv50_i2c_drive_scl, |
71 | .drive_sda = nv50_i2c_drive_sda, |
72 | .sense_scl = nv50_i2c_sense_scl, |
73 | .sense_sda = nv50_i2c_sense_sda, |
74 | }; |
75 | |
76 | const u32 nv50_i2c_addr[] = { |
77 | 0x00e138, 0x00e150, 0x00e168, 0x00e180, |
78 | 0x00e254, 0x00e274, 0x00e764, 0x00e780, |
79 | 0x00e79c, 0x00e7b8 |
80 | }; |
81 | const int nv50_i2c_addr_nr = ARRAY_SIZE(nv50_i2c_addr); |
82 | |
83 | static int |
84 | nv50_i2c_port_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
85 | struct nouveau_oclass *oclass, void *data, u32 index, |
86 | struct nouveau_object **pobject) |
87 | { |
88 | struct dcb_i2c_entry *info = data; |
89 | struct nv50_i2c_port *port; |
90 | int ret; |
91 | |
92 | ret = nouveau_i2c_port_create(parent, engine, oclass, index, |
93 | &nouveau_i2c_bit_algo, &nv50_i2c_func, |
94 | &port); |
95 | *pobject = nv_object(port); |
96 | if (ret) |
97 | return ret; |
98 | |
99 | if (info->drive >= nv50_i2c_addr_nr) |
100 | return -EINVAL; |
101 | |
102 | port->state = 0x00000007; |
103 | port->addr = nv50_i2c_addr[info->drive]; |
104 | return 0; |
105 | } |
106 | |
107 | int |
108 | nv50_i2c_port_init(struct nouveau_object *object) |
109 | { |
110 | struct nv50_i2c_priv *priv = (void *)object->engine; |
111 | struct nv50_i2c_port *port = (void *)object; |
112 | nv_wr32(priv, port->addr, port->state); |
113 | return nouveau_i2c_port_init(&port->base); |
114 | } |
115 | |
116 | static struct nouveau_oclass |
117 | nv50_i2c_sclass[] = { |
118 | { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NVIO_BIT), |
119 | .ofuncs = &(struct nouveau_ofuncs) { |
120 | .ctor = nv50_i2c_port_ctor, |
121 | .dtor = _nouveau_i2c_port_dtor, |
122 | .init = nv50_i2c_port_init, |
123 | .fini = _nouveau_i2c_port_fini, |
124 | }, |
125 | }, |
126 | {} |
127 | }; |
128 | |
129 | static int |
130 | nv50_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
131 | struct nouveau_oclass *oclass, void *data, u32 size, |
132 | struct nouveau_object **pobject) |
133 | { |
134 | struct nv50_i2c_priv *priv; |
135 | int ret; |
136 | |
137 | ret = nouveau_i2c_create(parent, engine, oclass, nv50_i2c_sclass, &priv); |
138 | *pobject = nv_object(priv); |
139 | if (ret) |
140 | return ret; |
141 | |
142 | return 0; |
143 | } |
144 | |
145 | struct nouveau_oclass |
146 | nv50_i2c_oclass = { |
147 | .handle = NV_SUBDEV(I2C, 0x50), |
148 | .ofuncs = &(struct nouveau_ofuncs) { |
149 | .ctor = nv50_i2c_ctor, |
150 | .dtor = _nouveau_i2c_dtor, |
151 | .init = _nouveau_i2c_init, |
152 | .fini = _nouveau_i2c_fini, |
153 | }, |
154 | }; |
155 | |