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45284162 BS |
1 | /* |
2 | * Copyright 2010 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 "drmP.h" | |
26 | #include "nouveau_drv.h" | |
27 | #include "nouveau_hw.h" | |
28 | ||
29 | static int | |
30 | nv50_gpio_location(struct dcb_gpio_entry *gpio, uint32_t *reg, uint32_t *shift) | |
31 | { | |
32 | const uint32_t nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 }; | |
33 | ||
55a4c5c5 | 34 | if (gpio->line >= 32) |
45284162 BS |
35 | return -EINVAL; |
36 | ||
37 | *reg = nv50_gpio_reg[gpio->line >> 3]; | |
38 | *shift = (gpio->line & 7) << 2; | |
39 | return 0; | |
40 | } | |
41 | ||
42 | int | |
43 | nv50_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag) | |
44 | { | |
45 | struct dcb_gpio_entry *gpio; | |
46 | uint32_t r, s, v; | |
47 | ||
48 | gpio = nouveau_bios_gpio_entry(dev, tag); | |
49 | if (!gpio) | |
50 | return -ENOENT; | |
51 | ||
52 | if (nv50_gpio_location(gpio, &r, &s)) | |
53 | return -EINVAL; | |
54 | ||
55 | v = nv_rd32(dev, r) >> (s + 2); | |
56 | return ((v & 1) == (gpio->state[1] & 1)); | |
57 | } | |
58 | ||
59 | int | |
60 | nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state) | |
61 | { | |
62 | struct dcb_gpio_entry *gpio; | |
63 | uint32_t r, s, v; | |
64 | ||
65 | gpio = nouveau_bios_gpio_entry(dev, tag); | |
66 | if (!gpio) | |
67 | return -ENOENT; | |
68 | ||
69 | if (nv50_gpio_location(gpio, &r, &s)) | |
70 | return -EINVAL; | |
71 | ||
72 | v = nv_rd32(dev, r) & ~(0x3 << s); | |
73 | v |= (gpio->state[state] ^ 2) << s; | |
74 | nv_wr32(dev, r, v); | |
75 | return 0; | |
76 | } |