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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