Root/include/sound/cs8403.h

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
39SND_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
82SND_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
169SND_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
208SND_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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