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
33struct nv4e_i2c_priv {
34 struct nouveau_i2c base;
35};
36
37struct nv4e_i2c_port {
38 struct nouveau_i2c_port base;
39 u32 addr;
40};
41
42static void
43nv4e_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
50static void
51nv4e_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
58static int
59nv4e_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
66static int
67nv4e_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
74static const struct nouveau_i2c_func
75nv4e_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
82static int
83nv4e_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
102static struct nouveau_oclass
103nv4e_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
115static int
116nv4e_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
131struct nouveau_oclass
132nv4e_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