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
26 void
gf119_gpio_reset(struct nvkm_gpio * gpio,u8 match)27 gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
28 {
29 struct nvkm_device *device = gpio->subdev.device;
30 struct nvkm_bios *bios = device->bios;
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 = nvbios_rd32(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 nvkm_gpio_set(gpio, 0, func, line, defs);
48
49 nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
50 if (unk1--)
51 nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
52 }
53 }
54
55 int
gf119_gpio_drive(struct nvkm_gpio * gpio,int line,int dir,int out)56 gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
57 {
58 struct nvkm_device *device = gpio->subdev.device;
59 u32 data = ((dir ^ 1) << 13) | (out << 12);
60 nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
61 nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
62 return 0;
63 }
64
65 int
gf119_gpio_sense(struct nvkm_gpio * gpio,int line)66 gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
67 {
68 struct nvkm_device *device = gpio->subdev.device;
69 return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
70 }
71
72 static const struct nvkm_gpio_func
73 gf119_gpio = {
74 .lines = 32,
75 .intr_stat = g94_gpio_intr_stat,
76 .intr_mask = g94_gpio_intr_mask,
77 .drive = gf119_gpio_drive,
78 .sense = gf119_gpio_sense,
79 .reset = gf119_gpio_reset,
80 };
81
82 int
gf119_gpio_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_gpio ** pgpio)83 gf119_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
84 struct nvkm_gpio **pgpio)
85 {
86 return nvkm_gpio_new_(&gf119_gpio, device, type, inst, pgpio);
87 }
88