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1 | #ifndef __SOUND_CS8403_H |
2 | #define __SOUND_CS8403_H |
3 | |
4 | /* |
5 | * Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter |
6 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, |
7 | * Takashi Iwai <tiwai@suse.de> |
8 | * |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License as published by |
12 | * the Free Software Foundation; either version 2 of the License, or |
13 | * (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | * GNU General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
23 | * |
24 | */ |
25 | |
26 | #ifdef SND_CS8403 |
27 | |
28 | #ifndef SND_CS8403_DECL |
29 | #define SND_CS8403_DECL static |
30 | #endif |
31 | #ifndef SND_CS8403_DECODE |
32 | #define SND_CS8403_DECODE snd_cs8403_decode_spdif_bits |
33 | #endif |
34 | #ifndef SND_CS8403_ENCODE |
35 | #define SND_CS8403_ENCODE snd_cs8403_encode_spdif_bits |
36 | #endif |
37 | |
38 | |
39 | SND_CS8403_DECL void SND_CS8403_DECODE(struct snd_aes_iec958 *diga, unsigned char bits) |
40 | { |
41 | if (bits & 0x01) { /* consumer */ |
42 | if (!(bits & 0x02)) |
43 | diga->status[0] |= IEC958_AES0_NONAUDIO; |
44 | if (!(bits & 0x08)) |
45 | diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT; |
46 | switch (bits & 0x10) { |
47 | case 0x10: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; break; |
48 | case 0x00: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; break; |
49 | } |
50 | if (!(bits & 0x80)) |
51 | diga->status[1] |= IEC958_AES1_CON_ORIGINAL; |
52 | switch (bits & 0x60) { |
53 | case 0x00: diga->status[1] |= IEC958_AES1_CON_MAGNETIC_ID; break; |
54 | case 0x20: diga->status[1] |= IEC958_AES1_CON_DIGDIGCONV_ID; break; |
55 | case 0x40: diga->status[1] |= IEC958_AES1_CON_LASEROPT_ID; break; |
56 | case 0x60: diga->status[1] |= IEC958_AES1_CON_GENERAL; break; |
57 | } |
58 | switch (bits & 0x06) { |
59 | case 0x00: diga->status[3] |= IEC958_AES3_CON_FS_44100; break; |
60 | case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_48000; break; |
61 | case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_32000; break; |
62 | } |
63 | } else { |
64 | diga->status[0] = IEC958_AES0_PROFESSIONAL; |
65 | switch (bits & 0x18) { |
66 | case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break; |
67 | case 0x10: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break; |
68 | case 0x08: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break; |
69 | case 0x18: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break; |
70 | } |
71 | switch (bits & 0x60) { |
72 | case 0x20: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break; |
73 | case 0x40: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break; |
74 | case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break; |
75 | case 0x60: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break; |
76 | } |
77 | if (bits & 0x80) |
78 | diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC; |
79 | } |
80 | } |
81 | |
82 | SND_CS8403_DECL unsigned char SND_CS8403_ENCODE(struct snd_aes_iec958 *diga) |
83 | { |
84 | unsigned char bits; |
85 | |
86 | if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) { |
87 | bits = 0x01; /* consumer mode */ |
88 | if (diga->status[0] & IEC958_AES0_NONAUDIO) |
89 | bits &= ~0x02; |
90 | else |
91 | bits |= 0x02; |
92 | if (diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT) |
93 | bits &= ~0x08; |
94 | else |
95 | bits |= 0x08; |
96 | switch (diga->status[0] & IEC958_AES0_CON_EMPHASIS) { |
97 | default: |
98 | case IEC958_AES0_CON_EMPHASIS_NONE: bits |= 0x10; break; |
99 | case IEC958_AES0_CON_EMPHASIS_5015: bits |= 0x00; break; |
100 | } |
101 | if (diga->status[1] & IEC958_AES1_CON_ORIGINAL) |
102 | bits &= ~0x80; |
103 | else |
104 | bits |= 0x80; |
105 | if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL) |
106 | bits |= 0x60; |
107 | else { |
108 | switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) { |
109 | case IEC958_AES1_CON_MAGNETIC_ID: |
110 | bits |= 0x00; break; |
111 | case IEC958_AES1_CON_DIGDIGCONV_ID: |
112 | bits |= 0x20; break; |
113 | default: |
114 | case IEC958_AES1_CON_LASEROPT_ID: |
115 | bits |= 0x40; break; |
116 | } |
117 | } |
118 | switch (diga->status[3] & IEC958_AES3_CON_FS) { |
119 | default: |
120 | case IEC958_AES3_CON_FS_44100: bits |= 0x00; break; |
121 | case IEC958_AES3_CON_FS_48000: bits |= 0x02; break; |
122 | case IEC958_AES3_CON_FS_32000: bits |= 0x04; break; |
123 | } |
124 | } else { |
125 | bits = 0x00; /* professional mode */ |
126 | if (diga->status[0] & IEC958_AES0_NONAUDIO) |
127 | bits &= ~0x02; |
128 | else |
129 | bits |= 0x02; |
130 | /* CHECKME: I'm not sure about the bit order in val here */ |
131 | switch (diga->status[0] & IEC958_AES0_PRO_FS) { |
132 | case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break; |
133 | case IEC958_AES0_PRO_FS_44100: bits |= 0x10; break; /* 44.1kHz */ |
134 | case IEC958_AES0_PRO_FS_48000: bits |= 0x08; break; /* 48kHz */ |
135 | default: |
136 | case IEC958_AES0_PRO_FS_NOTID: bits |= 0x18; break; |
137 | } |
138 | switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) { |
139 | case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x20; break; |
140 | case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x40; break; |
141 | case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break; |
142 | default: |
143 | case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x60; break; |
144 | } |
145 | switch (diga->status[1] & IEC958_AES1_PRO_MODE) { |
146 | case IEC958_AES1_PRO_MODE_TWO: |
147 | case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break; |
148 | default: bits |= 0x80; break; |
149 | } |
150 | } |
151 | return bits; |
152 | } |
153 | |
154 | #endif /* SND_CS8403 */ |
155 | |
156 | #ifdef SND_CS8404 |
157 | |
158 | #ifndef SND_CS8404_DECL |
159 | #define SND_CS8404_DECL static |
160 | #endif |
161 | #ifndef SND_CS8404_DECODE |
162 | #define SND_CS8404_DECODE snd_cs8404_decode_spdif_bits |
163 | #endif |
164 | #ifndef SND_CS8404_ENCODE |
165 | #define SND_CS8404_ENCODE snd_cs8404_encode_spdif_bits |
166 | #endif |
167 | |
168 | |
169 | SND_CS8404_DECL void SND_CS8404_DECODE(struct snd_aes_iec958 *diga, unsigned char bits) |
170 | { |
171 | if (bits & 0x10) { /* consumer */ |
172 | if (!(bits & 0x20)) |
173 | diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT; |
174 | if (!(bits & 0x40)) |
175 | diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; |
176 | if (!(bits & 0x80)) |
177 | diga->status[1] |= IEC958_AES1_CON_ORIGINAL; |
178 | switch (bits & 0x03) { |
179 | case 0x00: diga->status[1] |= IEC958_AES1_CON_DAT; break; |
180 | case 0x03: diga->status[1] |= IEC958_AES1_CON_GENERAL; break; |
181 | } |
182 | switch (bits & 0x06) { |
183 | case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_32000; break; |
184 | case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_48000; break; |
185 | case 0x06: diga->status[3] |= IEC958_AES3_CON_FS_44100; break; |
186 | } |
187 | } else { |
188 | diga->status[0] = IEC958_AES0_PROFESSIONAL; |
189 | if (!(bits & 0x04)) |
190 | diga->status[0] |= IEC958_AES0_NONAUDIO; |
191 | switch (bits & 0x60) { |
192 | case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break; |
193 | case 0x40: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break; |
194 | case 0x20: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break; |
195 | case 0x60: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break; |
196 | } |
197 | switch (bits & 0x03) { |
198 | case 0x02: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break; |
199 | case 0x01: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break; |
200 | case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break; |
201 | case 0x03: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break; |
202 | } |
203 | if (!(bits & 0x80)) |
204 | diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC; |
205 | } |
206 | } |
207 | |
208 | SND_CS8404_DECL unsigned char SND_CS8404_ENCODE(struct snd_aes_iec958 *diga) |
209 | { |
210 | unsigned char bits; |
211 | |
212 | if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) { |
213 | bits = 0x10; /* consumer mode */ |
214 | if (!(diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT)) |
215 | bits |= 0x20; |
216 | if ((diga->status[0] & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_NONE) |
217 | bits |= 0x40; |
218 | if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL)) |
219 | bits |= 0x80; |
220 | if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL) |
221 | bits |= 0x03; |
222 | switch (diga->status[3] & IEC958_AES3_CON_FS) { |
223 | default: |
224 | case IEC958_AES3_CON_FS_44100: bits |= 0x06; break; |
225 | case IEC958_AES3_CON_FS_48000: bits |= 0x04; break; |
226 | case IEC958_AES3_CON_FS_32000: bits |= 0x02; break; |
227 | } |
228 | } else { |
229 | bits = 0x00; /* professional mode */ |
230 | if (!(diga->status[0] & IEC958_AES0_NONAUDIO)) |
231 | bits |= 0x04; |
232 | switch (diga->status[0] & IEC958_AES0_PRO_FS) { |
233 | case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break; |
234 | case IEC958_AES0_PRO_FS_44100: bits |= 0x40; break; /* 44.1kHz */ |
235 | case IEC958_AES0_PRO_FS_48000: bits |= 0x20; break; /* 48kHz */ |
236 | default: |
237 | case IEC958_AES0_PRO_FS_NOTID: bits |= 0x00; break; |
238 | } |
239 | switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) { |
240 | case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x02; break; |
241 | case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x01; break; |
242 | case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break; |
243 | default: |
244 | case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x03; break; |
245 | } |
246 | switch (diga->status[1] & IEC958_AES1_PRO_MODE) { |
247 | case IEC958_AES1_PRO_MODE_TWO: |
248 | case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break; |
249 | default: bits |= 0x80; break; |
250 | } |
251 | } |
252 | return bits; |
253 | } |
254 | |
255 | #endif /* SND_CS8404 */ |
256 | |
257 | #endif /* __SOUND_CS8403_H */ |
258 |
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