1 | /* $NetBSD: nouveau_subdev_i2c_nv4e.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_nv4e.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $" ); |
29 | |
30 | #include <subdev/i2c.h> |
31 | #include <subdev/vga.h> |
32 | |
33 | struct nv4e_i2c_priv { |
34 | struct nouveau_i2c base; |
35 | }; |
36 | |
37 | struct nv4e_i2c_port { |
38 | struct nouveau_i2c_port base; |
39 | u32 addr; |
40 | }; |
41 | |
42 | static void |
43 | nv4e_i2c_drive_scl(struct nouveau_i2c_port *base, int state) |
44 | { |
45 | struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine; |
46 | struct nv4e_i2c_port *port = (void *)base; |
47 | nv_mask(priv, port->addr, 0x2f, state ? 0x21 : 0x01); |
48 | } |
49 | |
50 | static void |
51 | nv4e_i2c_drive_sda(struct nouveau_i2c_port *base, int state) |
52 | { |
53 | struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine; |
54 | struct nv4e_i2c_port *port = (void *)base; |
55 | nv_mask(priv, port->addr, 0x1f, state ? 0x11 : 0x01); |
56 | } |
57 | |
58 | static int |
59 | nv4e_i2c_sense_scl(struct nouveau_i2c_port *base) |
60 | { |
61 | struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine; |
62 | struct nv4e_i2c_port *port = (void *)base; |
63 | return !!(nv_rd32(priv, port->addr) & 0x00040000); |
64 | } |
65 | |
66 | static int |
67 | nv4e_i2c_sense_sda(struct nouveau_i2c_port *base) |
68 | { |
69 | struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine; |
70 | struct nv4e_i2c_port *port = (void *)base; |
71 | return !!(nv_rd32(priv, port->addr) & 0x00080000); |
72 | } |
73 | |
74 | static const struct nouveau_i2c_func |
75 | nv4e_i2c_func = { |
76 | .drive_scl = nv4e_i2c_drive_scl, |
77 | .drive_sda = nv4e_i2c_drive_sda, |
78 | .sense_scl = nv4e_i2c_sense_scl, |
79 | .sense_sda = nv4e_i2c_sense_sda, |
80 | }; |
81 | |
82 | static int |
83 | nv4e_i2c_port_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
84 | struct nouveau_oclass *oclass, void *data, u32 index, |
85 | struct nouveau_object **pobject) |
86 | { |
87 | struct dcb_i2c_entry *info = data; |
88 | struct nv4e_i2c_port *port; |
89 | int ret; |
90 | |
91 | ret = nouveau_i2c_port_create(parent, engine, oclass, index, |
92 | &nouveau_i2c_bit_algo, &nv4e_i2c_func, |
93 | &port); |
94 | *pobject = nv_object(port); |
95 | if (ret) |
96 | return ret; |
97 | |
98 | port->addr = 0x600800 + info->drive; |
99 | return 0; |
100 | } |
101 | |
102 | static struct nouveau_oclass |
103 | nv4e_i2c_sclass[] = { |
104 | { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NV4E_BIT), |
105 | .ofuncs = &(struct nouveau_ofuncs) { |
106 | .ctor = nv4e_i2c_port_ctor, |
107 | .dtor = _nouveau_i2c_port_dtor, |
108 | .init = _nouveau_i2c_port_init, |
109 | .fini = _nouveau_i2c_port_fini, |
110 | }, |
111 | }, |
112 | {} |
113 | }; |
114 | |
115 | static int |
116 | nv4e_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
117 | struct nouveau_oclass *oclass, void *data, u32 size, |
118 | struct nouveau_object **pobject) |
119 | { |
120 | struct nv4e_i2c_priv *priv; |
121 | int ret; |
122 | |
123 | ret = nouveau_i2c_create(parent, engine, oclass, nv4e_i2c_sclass, &priv); |
124 | *pobject = nv_object(priv); |
125 | if (ret) |
126 | return ret; |
127 | |
128 | return 0; |
129 | } |
130 | |
131 | struct nouveau_oclass |
132 | nv4e_i2c_oclass = { |
133 | .handle = NV_SUBDEV(I2C, 0x4e), |
134 | .ofuncs = &(struct nouveau_ofuncs) { |
135 | .ctor = nv4e_i2c_ctor, |
136 | .dtor = _nouveau_i2c_dtor, |
137 | .init = _nouveau_i2c_init, |
138 | .fini = _nouveau_i2c_fini, |
139 | }, |
140 | }; |
141 | |