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5#include <linux/export.h>
6#include <linux/types.h>
7#include <sound/asoundef.h>
8#include <sound/pcm.h>
9#include <sound/pcm_params.h>
10#include <sound/pcm_iec958.h>
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29int snd_pcm_create_iec958_consumer_default(u8 *cs, size_t len)
30{
31 if (len < 4)
32 return -EINVAL;
33
34 memset(cs, 0, len);
35
36 cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE;
37 cs[1] = IEC958_AES1_CON_GENERAL;
38 cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC | IEC958_AES2_CON_CHANNEL_UNSPEC;
39 cs[3] = IEC958_AES3_CON_CLOCK_1000PPM | IEC958_AES3_CON_FS_NOTID;
40
41 if (len > 4)
42 cs[4] = IEC958_AES4_CON_WORDLEN_NOTID;
43
44 return len;
45}
46EXPORT_SYMBOL_GPL(snd_pcm_create_iec958_consumer_default);
47
48static int fill_iec958_consumer(uint rate, uint sample_width,
49 u8 *cs, size_t len)
50{
51 if (len < 4)
52 return -EINVAL;
53
54 if ((cs[3] & IEC958_AES3_CON_FS) == IEC958_AES3_CON_FS_NOTID) {
55 unsigned int fs;
56
57 switch (rate) {
58 case 32000:
59 fs = IEC958_AES3_CON_FS_32000;
60 break;
61 case 44100:
62 fs = IEC958_AES3_CON_FS_44100;
63 break;
64 case 48000:
65 fs = IEC958_AES3_CON_FS_48000;
66 break;
67 case 88200:
68 fs = IEC958_AES3_CON_FS_88200;
69 break;
70 case 96000:
71 fs = IEC958_AES3_CON_FS_96000;
72 break;
73 case 176400:
74 fs = IEC958_AES3_CON_FS_176400;
75 break;
76 case 192000:
77 fs = IEC958_AES3_CON_FS_192000;
78 break;
79 default:
80 return -EINVAL;
81 }
82
83 cs[3] &= ~IEC958_AES3_CON_FS;
84 cs[3] |= fs;
85 }
86
87 if (len > 4 &&
88 (cs[4] & IEC958_AES4_CON_WORDLEN) == IEC958_AES4_CON_WORDLEN_NOTID) {
89 unsigned int ws;
90
91 switch (sample_width) {
92 case 16:
93 ws = IEC958_AES4_CON_WORDLEN_20_16;
94 break;
95 case 18:
96 ws = IEC958_AES4_CON_WORDLEN_22_18;
97 break;
98 case 20:
99 ws = IEC958_AES4_CON_WORDLEN_20_16 |
100 IEC958_AES4_CON_MAX_WORDLEN_24;
101 break;
102 case 24:
103 case 32:
104 ws = IEC958_AES4_CON_WORDLEN_24_20 |
105 IEC958_AES4_CON_MAX_WORDLEN_24;
106 break;
107
108 default:
109 return -EINVAL;
110 }
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112 cs[4] &= ~IEC958_AES4_CON_WORDLEN;
113 cs[4] |= ws;
114 }
115
116 return len;
117}
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133int snd_pcm_fill_iec958_consumer(struct snd_pcm_runtime *runtime,
134 u8 *cs, size_t len)
135{
136 return fill_iec958_consumer(runtime->rate,
137 snd_pcm_format_width(runtime->format),
138 cs, len);
139}
140EXPORT_SYMBOL_GPL(snd_pcm_fill_iec958_consumer);
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156int snd_pcm_fill_iec958_consumer_hw_params(struct snd_pcm_hw_params *params,
157 u8 *cs, size_t len)
158{
159 return fill_iec958_consumer(params_rate(params), params_width(params), cs, len);
160}
161EXPORT_SYMBOL_GPL(snd_pcm_fill_iec958_consumer_hw_params);
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176int snd_pcm_create_iec958_consumer(struct snd_pcm_runtime *runtime, u8 *cs,
177 size_t len)
178{
179 int ret;
180
181 ret = snd_pcm_create_iec958_consumer_default(cs, len);
182 if (ret < 0)
183 return ret;
184
185 return snd_pcm_fill_iec958_consumer(runtime, cs, len);
186}
187EXPORT_SYMBOL(snd_pcm_create_iec958_consumer);
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202int snd_pcm_create_iec958_consumer_hw_params(struct snd_pcm_hw_params *params,
203 u8 *cs, size_t len)
204{
205 int ret;
206
207 ret = snd_pcm_create_iec958_consumer_default(cs, len);
208 if (ret < 0)
209 return ret;
210
211 return fill_iec958_consumer(params_rate(params), params_width(params), cs, len);
212}
213EXPORT_SYMBOL(snd_pcm_create_iec958_consumer_hw_params);
214