nvd0.c revision b485a7005faba38286bc02ab1d80e2cbf61c1002 
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
25#include "priv.h"
26
27void
28nvd0_gpio_reset(struct nouveau_gpio *gpio, u8 match)
29{
30	struct nouveau_bios *bios = nouveau_bios(gpio);
31	u8 ver, len;
32	u16 entry;
33	int ent = -1;
34
35	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
36		u32 data = nv_ro32(bios, entry);
37		u8  line =   (data & 0x0000003f);
38		u8  defs = !!(data & 0x00000080);
39		u8  func =   (data & 0x0000ff00) >> 8;
40		u8  unk0 =   (data & 0x00ff0000) >> 16;
41		u8  unk1 =   (data & 0x1f000000) >> 24;
42
43		if ( func  == DCB_GPIO_UNUSED ||
44		    (match != DCB_GPIO_UNUSED && match != func))
45			continue;
46
47		gpio->set(gpio, 0, func, line, defs);
48
49		nv_mask(gpio, 0x00d610 + (line * 4), 0xff, unk0);
50		if (unk1--)
51			nv_mask(gpio, 0x00d740 + (unk1 * 4), 0xff, line);
52	}
53}
54
55int
56nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out)
57{
58	u32 data = ((dir ^ 1) << 13) | (out << 12);
59	nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data);
60	nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */
61	return 0;
62}
63
64int
65nvd0_gpio_sense(struct nouveau_gpio *gpio, int line)
66{
67	return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000);
68}
69
70struct nouveau_oclass *
71nvd0_gpio_oclass = &(struct nouveau_gpio_impl) {
72	.base.handle = NV_SUBDEV(GPIO, 0xd0),
73	.base.ofuncs = &(struct nouveau_ofuncs) {
74		.ctor = _nouveau_gpio_ctor,
75		.dtor = _nouveau_gpio_dtor,
76		.init = _nouveau_gpio_init,
77		.fini = _nouveau_gpio_fini,
78	},
79	.lines = 32,
80	.intr_stat = nv94_gpio_intr_stat,
81	.intr_mask = nv94_gpio_intr_mask,
82	.drive = nvd0_gpio_drive,
83	.sense = nvd0_gpio_sense,
84	.reset = nvd0_gpio_reset,
85}.base;
86