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@suse.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(snd_aes_iec958_t *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(snd_aes_iec958_t *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(snd_aes_iec958_t *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(snd_aes_iec958_t *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 */