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#include "priv.h"
25
26void
27gf110_gpio_reset(struct nvkm_gpio *gpio, u8 match)
28{
29	struct nvkm_bios *bios = nvkm_bios(gpio);
30	u8 ver, len;
31	u16 entry;
32	int ent = -1;
33
34	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
35		u32 data = nv_ro32(bios, entry);
36		u8  line =   (data & 0x0000003f);
37		u8  defs = !!(data & 0x00000080);
38		u8  func =   (data & 0x0000ff00) >> 8;
39		u8  unk0 =   (data & 0x00ff0000) >> 16;
40		u8  unk1 =   (data & 0x1f000000) >> 24;
41
42		if ( func  == DCB_GPIO_UNUSED ||
43		    (match != DCB_GPIO_UNUSED && match != func))
44			continue;
45
46		gpio->set(gpio, 0, func, line, defs);
47
48		nv_mask(gpio, 0x00d610 + (line * 4), 0xff, unk0);
49		if (unk1--)
50			nv_mask(gpio, 0x00d740 + (unk1 * 4), 0xff, line);
51	}
52}
53
54int
55gf110_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
56{
57	u32 data = ((dir ^ 1) << 13) | (out << 12);
58	nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data);
59	nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */
60	return 0;
61}
62
63int
64gf110_gpio_sense(struct nvkm_gpio *gpio, int line)
65{
66	return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000);
67}
68
69struct nvkm_oclass *
70gf110_gpio_oclass = &(struct nvkm_gpio_impl) {
71	.base.handle = NV_SUBDEV(GPIO, 0xd0),
72	.base.ofuncs = &(struct nvkm_ofuncs) {
73		.ctor = _nvkm_gpio_ctor,
74		.dtor = _nvkm_gpio_dtor,
75		.init = _nvkm_gpio_init,
76		.fini = _nvkm_gpio_fini,
77	},
78	.lines = 32,
79	.intr_stat = g94_gpio_intr_stat,
80	.intr_mask = g94_gpio_intr_mask,
81	.drive = gf110_gpio_drive,
82	.sense = gf110_gpio_sense,
83	.reset = gf110_gpio_reset,
84}.base;
85