1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef __SOUND_CS8403_H
3 #define __SOUND_CS8403_H
4
5 /*
6 * Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter
7 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
8 * Takashi Iwai <tiwai@suse.de>
9 */
10
11 #ifdef SND_CS8403
12
13 #ifndef SND_CS8403_DECL
14 #define SND_CS8403_DECL static
15 #endif
16 #ifndef SND_CS8403_DECODE
17 #define SND_CS8403_DECODE snd_cs8403_decode_spdif_bits
18 #endif
19 #ifndef SND_CS8403_ENCODE
20 #define SND_CS8403_ENCODE snd_cs8403_encode_spdif_bits
21 #endif
22
23
24 SND_CS8403_DECL void SND_CS8403_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
25 {
26 if (bits & 0x01) { /* consumer */
27 if (!(bits & 0x02))
28 diga->status[0] |= IEC958_AES0_NONAUDIO;
29 if (!(bits & 0x08))
30 diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
31 switch (bits & 0x10) {
32 case 0x10: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; break;
33 case 0x00: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; break;
34 }
35 if (!(bits & 0x80))
36 diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
37 switch (bits & 0x60) {
38 case 0x00: diga->status[1] |= IEC958_AES1_CON_MAGNETIC_ID; break;
39 case 0x20: diga->status[1] |= IEC958_AES1_CON_DIGDIGCONV_ID; break;
40 case 0x40: diga->status[1] |= IEC958_AES1_CON_LASEROPT_ID; break;
41 case 0x60: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
42 }
43 switch (bits & 0x06) {
44 case 0x00: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
45 case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
46 case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
47 }
48 } else {
49 diga->status[0] = IEC958_AES0_PROFESSIONAL;
50 switch (bits & 0x18) {
51 case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
52 case 0x10: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
53 case 0x08: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
54 case 0x18: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
55 }
56 switch (bits & 0x60) {
57 case 0x20: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
58 case 0x40: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
59 case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
60 case 0x60: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
61 }
62 if (bits & 0x80)
63 diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
64 }
65 }
66
67 SND_CS8403_DECL unsigned char SND_CS8403_ENCODE(struct snd_aes_iec958 *diga)
68 {
69 unsigned char bits;
70
71 if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
72 bits = 0x01; /* consumer mode */
73 if (diga->status[0] & IEC958_AES0_NONAUDIO)
74 bits &= ~0x02;
75 else
76 bits |= 0x02;
77 if (diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT)
78 bits &= ~0x08;
79 else
80 bits |= 0x08;
81 switch (diga->status[0] & IEC958_AES0_CON_EMPHASIS) {
82 default:
83 case IEC958_AES0_CON_EMPHASIS_NONE: bits |= 0x10; break;
84 case IEC958_AES0_CON_EMPHASIS_5015: bits |= 0x00; break;
85 }
86 if (diga->status[1] & IEC958_AES1_CON_ORIGINAL)
87 bits &= ~0x80;
88 else
89 bits |= 0x80;
90 if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
91 bits |= 0x60;
92 else {
93 switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) {
94 case IEC958_AES1_CON_MAGNETIC_ID:
95 bits |= 0x00; break;
96 case IEC958_AES1_CON_DIGDIGCONV_ID:
97 bits |= 0x20; break;
98 default:
99 case IEC958_AES1_CON_LASEROPT_ID:
100 bits |= 0x40; break;
101 }
102 }
103 switch (diga->status[3] & IEC958_AES3_CON_FS) {
104 default:
105 case IEC958_AES3_CON_FS_44100: bits |= 0x00; break;
106 case IEC958_AES3_CON_FS_48000: bits |= 0x02; break;
107 case IEC958_AES3_CON_FS_32000: bits |= 0x04; break;
108 }
109 } else {
110 bits = 0x00; /* professional mode */
111 if (diga->status[0] & IEC958_AES0_NONAUDIO)
112 bits &= ~0x02;
113 else
114 bits |= 0x02;
115 /* CHECKME: I'm not sure about the bit order in val here */
116 switch (diga->status[0] & IEC958_AES0_PRO_FS) {
117 case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
118 case IEC958_AES0_PRO_FS_44100: bits |= 0x10; break; /* 44.1kHz */
119 case IEC958_AES0_PRO_FS_48000: bits |= 0x08; break; /* 48kHz */
120 default:
121 case IEC958_AES0_PRO_FS_NOTID: bits |= 0x18; break;
122 }
123 switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
124 case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x20; break;
125 case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x40; break;
126 case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
127 default:
128 case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x60; break;
129 }
130 switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
131 case IEC958_AES1_PRO_MODE_TWO:
132 case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
133 default: bits |= 0x80; break;
134 }
135 }
136 return bits;
137 }
138
139 #endif /* SND_CS8403 */
140
141 #ifdef SND_CS8404
142
143 #ifndef SND_CS8404_DECL
144 #define SND_CS8404_DECL static
145 #endif
146 #ifndef SND_CS8404_DECODE
147 #define SND_CS8404_DECODE snd_cs8404_decode_spdif_bits
148 #endif
149 #ifndef SND_CS8404_ENCODE
150 #define SND_CS8404_ENCODE snd_cs8404_encode_spdif_bits
151 #endif
152
153
154 SND_CS8404_DECL void SND_CS8404_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
155 {
156 if (bits & 0x10) { /* consumer */
157 if (!(bits & 0x20))
158 diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
159 if (!(bits & 0x40))
160 diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015;
161 if (!(bits & 0x80))
162 diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
163 switch (bits & 0x03) {
164 case 0x00: diga->status[1] |= IEC958_AES1_CON_DAT; break;
165 case 0x03: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
166 }
167 switch (bits & 0x06) {
168 case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
169 case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
170 case 0x06: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
171 }
172 } else {
173 diga->status[0] = IEC958_AES0_PROFESSIONAL;
174 if (!(bits & 0x04))
175 diga->status[0] |= IEC958_AES0_NONAUDIO;
176 switch (bits & 0x60) {
177 case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
178 case 0x40: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
179 case 0x20: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
180 case 0x60: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
181 }
182 switch (bits & 0x03) {
183 case 0x02: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
184 case 0x01: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
185 case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
186 case 0x03: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
187 }
188 if (!(bits & 0x80))
189 diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
190 }
191 }
192
193 SND_CS8404_DECL unsigned char SND_CS8404_ENCODE(struct snd_aes_iec958 *diga)
194 {
195 unsigned char bits;
196
197 if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
198 bits = 0x10; /* consumer mode */
199 if (!(diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT))
200 bits |= 0x20;
201 if ((diga->status[0] & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_NONE)
202 bits |= 0x40;
203 if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL))
204 bits |= 0x80;
205 if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
206 bits |= 0x03;
207 switch (diga->status[3] & IEC958_AES3_CON_FS) {
208 default:
209 case IEC958_AES3_CON_FS_44100: bits |= 0x06; break;
210 case IEC958_AES3_CON_FS_48000: bits |= 0x04; break;
211 case IEC958_AES3_CON_FS_32000: bits |= 0x02; break;
212 }
213 } else {
214 bits = 0x00; /* professional mode */
215 if (!(diga->status[0] & IEC958_AES0_NONAUDIO))
216 bits |= 0x04;
217 switch (diga->status[0] & IEC958_AES0_PRO_FS) {
218 case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
219 case IEC958_AES0_PRO_FS_44100: bits |= 0x40; break; /* 44.1kHz */
220 case IEC958_AES0_PRO_FS_48000: bits |= 0x20; break; /* 48kHz */
221 default:
222 case IEC958_AES0_PRO_FS_NOTID: bits |= 0x00; break;
223 }
224 switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
225 case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x02; break;
226 case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x01; break;
227 case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
228 default:
229 case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x03; break;
230 }
231 switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
232 case IEC958_AES1_PRO_MODE_TWO:
233 case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
234 default: bits |= 0x80; break;
235 }
236 }
237 return bits;
238 }
239
240 #endif /* SND_CS8404 */
241
242 #endif /* __SOUND_CS8403_H */
243
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.