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cs8403.h
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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 <[email protected]>,
7  * Takashi Iwai <[email protected]>
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))
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 {
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)
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;
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;
106  bits |= 0x60;
107  else {
108  switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) {
110  bits |= 0x00; break;
112  bits |= 0x20; break;
113  default:
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) {
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))
174  if (!(bits & 0x40))
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))
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;
217  bits |= 0x40;
218  if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL))
219  bits |= 0x80;
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) {
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 */