jcs.org
Control intel backlight on FreeBSD (and OpenBSD)
openbsd
1/*
2 * Copyright © 2008 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 *
26 */
27
28#include <unistd.h>
29#include <stdlib.h>
30#include <stdio.h>
31#include <string.h>
32#include <errno.h>
33#include <err.h>
34#include <assert.h>
35#include <sys/ioctl.h>
36#include <fcntl.h>
37#include <sys/stat.h>
38#include <sys/mman.h>
39
40#include "intel_gpu_tools.h"
41
42enum pch_type pch;
43
44struct pci_device *
45intel_get_pci_device(void)
46{
47 struct pci_device *pci_dev;
48 int error;
49
50 error = pci_system_init();
51 if (error != 0) {
52 fprintf(stderr, "Couldn't initialize PCI system: %s\n",
53 strerror(error));
54 exit(1);
55 }
56
57 /* Grab the graphics card. Try the canonical slot first, then
58 * walk the entire PCI bus for a matching device. */
59 pci_dev = pci_device_find_by_slot(0, 0, 2, 0);
60 if (pci_dev == NULL || pci_dev->vendor_id != 0x8086) {
61 struct pci_device_iterator *iter;
62 struct pci_id_match match;
63
64 match.vendor_id = 0x8086; /* Intel */
65 match.device_id = PCI_MATCH_ANY;
66 match.subvendor_id = PCI_MATCH_ANY;
67 match.subdevice_id = PCI_MATCH_ANY;
68
69 match.device_class = 0x3 << 16;
70 match.device_class_mask = 0xff << 16;
71
72 match.match_data = 0;
73
74 iter = pci_id_match_iterator_create(&match);
75 pci_dev = pci_device_next(iter);
76 pci_iterator_destroy(iter);
77 }
78 if (pci_dev == NULL)
79 errx(1, "Couldn't find graphics card");
80
81 error = pci_device_probe(pci_dev);
82 if (error != 0) {
83 fprintf(stderr, "Couldn't probe graphics card: %s\n",
84 strerror(error));
85 exit(1);
86 }
87
88 if (pci_dev->vendor_id != 0x8086)
89 errx(1, "Graphics card is non-intel");
90
91 return pci_dev;
92}
93
94void
95intel_check_pch(void)
96{
97 struct pci_device *pch_dev;
98
99 pch_dev = pci_device_find_by_slot(0, 0, 31, 0);
100 if (pch_dev == NULL)
101 return;
102
103 if (pch_dev->vendor_id != 0x8086)
104 return;
105
106 switch (pch_dev->device_id & 0xff00) {
107 case 0x3b00:
108 pch = PCH_IBX;
109 break;
110 case 0x1c00:
111 case 0x1e00:
112 pch = PCH_CPT;
113 break;
114 case 0x8c00:
115 case 0x9c00:
116 pch = PCH_LPT;
117 break;
118 default:
119 pch = PCH_NONE;
120 return;
121 }
122}
123