1 | /* $NetBSD: hdafg_dd.c,v 1.1 2015/03/28 14:09:59 jmcneill Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. The name of the author may not be used to endorse or promote products |
13 | * derived from this software without specific prior written permission. |
14 | * |
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
20 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
21 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
22 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
23 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 | * SUCH DAMAGE. |
26 | */ |
27 | |
28 | /* |
29 | * HD audio Digital Display support |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: hdafg_dd.c,v 1.1 2015/03/28 14:09:59 jmcneill Exp $" ); |
34 | |
35 | #include <sys/types.h> |
36 | #include <sys/param.h> |
37 | #include <sys/systm.h> |
38 | #include <sys/kernel.h> |
39 | #include <sys/device.h> |
40 | #include <sys/conf.h> |
41 | #include <sys/bus.h> |
42 | |
43 | #include "hdaudioreg.h" |
44 | #include "hdaudiovar.h" |
45 | #include "hdafg_dd.h" |
46 | |
47 | int |
48 | hdafg_dd_parse_info(uint8_t *data, size_t datalen, struct hdafg_dd_info *hdi) |
49 | { |
50 | struct eld_baseline_block *block = &hdi->eld; |
51 | unsigned int i; |
52 | |
53 | printf("hdafg_dd_parse_info: datalen=%u\n" , (unsigned int)datalen); |
54 | |
55 | memset(hdi, 0, sizeof(*hdi)); |
56 | |
57 | if (datalen < sizeof(block->header)) { |
58 | printf(" no room for header\n" ); |
59 | return EINVAL; |
60 | } |
61 | |
62 | memcpy(&block->header, data, sizeof(block->header)); |
63 | data += sizeof(block->header); |
64 | datalen -= sizeof(block->header); |
65 | |
66 | if (datalen < block->header.baseline_eld_len * 4 || |
67 | datalen < sizeof(*block) - sizeof(block->header)) { |
68 | printf(" ack!\n" ); |
69 | return EINVAL; |
70 | } |
71 | |
72 | datalen = block->header.baseline_eld_len * 4; |
73 | |
74 | memcpy(&block->flags[0], data, sizeof(*block) - sizeof(block->header)); |
75 | data += sizeof(*block) - sizeof(block->header); |
76 | datalen -= sizeof(*block) - sizeof(block->header); |
77 | |
78 | if (datalen < ELD_MNL(block)) { |
79 | printf(" MNL=%u\n" , ELD_MNL(block)); |
80 | return EINVAL; |
81 | } |
82 | |
83 | memcpy(hdi->monitor, data, ELD_MNL(block)); |
84 | data += ELD_MNL(block); |
85 | datalen -= ELD_MNL(block); |
86 | |
87 | if (datalen != ELD_SAD_COUNT(block) * sizeof(hdi->sad[0])) { |
88 | printf(" datalen %u sadcount %u sizeof sad %u\n" , |
89 | (unsigned int)datalen, |
90 | ELD_SAD_COUNT(block), |
91 | (unsigned int)sizeof(hdi->sad[0])); |
92 | return EINVAL; |
93 | } |
94 | hdi->nsad = ELD_SAD_COUNT(block); |
95 | for (i = 0; i < hdi->nsad; i++) { |
96 | memcpy(&hdi->sad[i], data, sizeof(hdi->sad[i])); |
97 | data += sizeof(hdi->sad[i]); |
98 | datalen -= sizeof(hdi->sad[i]); |
99 | } |
100 | |
101 | printf("datalen = %u\n" , (unsigned int)datalen); |
102 | KASSERT(datalen == 0); |
103 | |
104 | return 0; |
105 | } |
106 | |
107 | void |
108 | hdafg_dd_hdmi_ai_cksum(struct hdmi_audio_infoframe *hdmi) |
109 | { |
110 | uint8_t *dip = (uint8_t *)hdmi, c = 0; |
111 | int i; |
112 | |
113 | hdmi->checksum = 0; |
114 | for (i = 0; i < sizeof(*hdmi); i++) |
115 | c += dip[i]; |
116 | hdmi->checksum = -c; |
117 | } |
118 | |