1/* $NetBSD: nouveau_subdev_gpio_nvd0.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_gpio_nvd0.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $");
29
30#include "priv.h"
31
32struct nvd0_gpio_priv {
33 struct nouveau_gpio base;
34};
35
36void
37nvd0_gpio_reset(struct nouveau_gpio *gpio, u8 match)
38{
39 struct nouveau_bios *bios = nouveau_bios(gpio);
40 struct nvd0_gpio_priv *priv = (void *)gpio;
41 u8 ver, len;
42 u16 entry;
43 int ent = -1;
44
45 while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
46 u32 data = nv_ro32(bios, entry);
47 u8 line = (data & 0x0000003f);
48 u8 defs = !!(data & 0x00000080);
49 u8 func = (data & 0x0000ff00) >> 8;
50 u8 unk0 = (data & 0x00ff0000) >> 16;
51 u8 unk1 = (data & 0x1f000000) >> 24;
52
53 if ( func == DCB_GPIO_UNUSED ||
54 (match != DCB_GPIO_UNUSED && match != func))
55 continue;
56
57 gpio->set(gpio, 0, func, line, defs);
58
59 nv_mask(priv, 0x00d610 + (line * 4), 0xff, unk0);
60 if (unk1--)
61 nv_mask(priv, 0x00d740 + (unk1 * 4), 0xff, line);
62 }
63}
64
65int
66nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out)
67{
68 u32 data = ((dir ^ 1) << 13) | (out << 12);
69 nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data);
70 nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */
71 return 0;
72}
73
74int
75nvd0_gpio_sense(struct nouveau_gpio *gpio, int line)
76{
77 return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000);
78}
79
80static int
81nvd0_gpio_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
82 struct nouveau_oclass *oclass, void *data, u32 size,
83 struct nouveau_object **pobject)
84{
85 struct nvd0_gpio_priv *priv;
86 int ret;
87
88 ret = nouveau_gpio_create(parent, engine, oclass, 32, &priv);
89 *pobject = nv_object(priv);
90 if (ret)
91 return ret;
92
93 priv->base.reset = nvd0_gpio_reset;
94 priv->base.drive = nvd0_gpio_drive;
95 priv->base.sense = nvd0_gpio_sense;
96 priv->base.events->priv = priv;
97 priv->base.events->enable = nv50_gpio_intr_enable;
98 priv->base.events->disable = nv50_gpio_intr_disable;
99 nv_subdev(priv)->intr = nv50_gpio_intr;
100 return 0;
101}
102
103struct nouveau_oclass
104nvd0_gpio_oclass = {
105 .handle = NV_SUBDEV(GPIO, 0xd0),
106 .ofuncs = &(struct nouveau_ofuncs) {
107 .ctor = nvd0_gpio_ctor,
108 .dtor = nv50_gpio_dtor,
109 .init = nv50_gpio_init,
110 .fini = nv50_gpio_fini,
111 },
112};
113