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cs8403.h
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cs8403.h
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#ifndef __SOUND_CS8403_H
#define __SOUND_CS8403_H
/*
* Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter
* Copyright (c) by Jaroslav Kysela <[email protected]>,
* Takashi Iwai <[email protected]>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifdef SND_CS8403
#ifndef SND_CS8403_DECL
#define SND_CS8403_DECL static
#endif
#ifndef SND_CS8403_DECODE
#define SND_CS8403_DECODE snd_cs8403_decode_spdif_bits
#endif
#ifndef SND_CS8403_ENCODE
#define SND_CS8403_ENCODE snd_cs8403_encode_spdif_bits
#endif
SND_CS8403_DECL void SND_CS8403_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
{
if (bits & 0x01) { /* consumer */
if (!(bits & 0x02))
diga->status[0] |= IEC958_AES0_NONAUDIO;
if (!(bits & 0x08))
diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
switch (bits & 0x10) {
case 0x10: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; break;
case 0x00: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; break;
}
if (!(bits & 0x80))
diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
switch (bits & 0x60) {
case 0x00: diga->status[1] |= IEC958_AES1_CON_MAGNETIC_ID; break;
case 0x20: diga->status[1] |= IEC958_AES1_CON_DIGDIGCONV_ID; break;
case 0x40: diga->status[1] |= IEC958_AES1_CON_LASEROPT_ID; break;
case 0x60: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
}
switch (bits & 0x06) {
case 0x00: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
}
} else {
diga->status[0] = IEC958_AES0_PROFESSIONAL;
switch (bits & 0x18) {
case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
case 0x10: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
case 0x08: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
case 0x18: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
}
switch (bits & 0x60) {
case 0x20: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
case 0x40: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
case 0x60: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
}
if (bits & 0x80)
diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
}
}
SND_CS8403_DECL unsigned char SND_CS8403_ENCODE(struct snd_aes_iec958 *diga)
{
unsigned char bits;
if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
bits = 0x01; /* consumer mode */
if (diga->status[0] & IEC958_AES0_NONAUDIO)
bits &= ~0x02;
else
bits |= 0x02;
if (diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT)
bits &= ~0x08;
else
bits |= 0x08;
switch (diga->status[0] & IEC958_AES0_CON_EMPHASIS) {
default:
case IEC958_AES0_CON_EMPHASIS_NONE: bits |= 0x10; break;
case IEC958_AES0_CON_EMPHASIS_5015: bits |= 0x00; break;
}
if (diga->status[1] & IEC958_AES1_CON_ORIGINAL)
bits &= ~0x80;
else
bits |= 0x80;
if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
bits |= 0x60;
else {
switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) {
case IEC958_AES1_CON_MAGNETIC_ID:
bits |= 0x00; break;
case IEC958_AES1_CON_DIGDIGCONV_ID:
bits |= 0x20; break;
default:
case IEC958_AES1_CON_LASEROPT_ID:
bits |= 0x40; break;
}
}
switch (diga->status[3] & IEC958_AES3_CON_FS) {
default:
case IEC958_AES3_CON_FS_44100: bits |= 0x00; break;
case IEC958_AES3_CON_FS_48000: bits |= 0x02; break;
case IEC958_AES3_CON_FS_32000: bits |= 0x04; break;
}
} else {
bits = 0x00; /* professional mode */
if (diga->status[0] & IEC958_AES0_NONAUDIO)
bits &= ~0x02;
else
bits |= 0x02;
/* CHECKME: I'm not sure about the bit order in val here */
switch (diga->status[0] & IEC958_AES0_PRO_FS) {
case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
case IEC958_AES0_PRO_FS_44100: bits |= 0x10; break; /* 44.1kHz */
case IEC958_AES0_PRO_FS_48000: bits |= 0x08; break; /* 48kHz */
default:
case IEC958_AES0_PRO_FS_NOTID: bits |= 0x18; break;
}
switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x20; break;
case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x40; break;
case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
default:
case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x60; break;
}
switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
case IEC958_AES1_PRO_MODE_TWO:
case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
default: bits |= 0x80; break;
}
}
return bits;
}
#endif /* SND_CS8403 */
#ifdef SND_CS8404
#ifndef SND_CS8404_DECL
#define SND_CS8404_DECL static
#endif
#ifndef SND_CS8404_DECODE
#define SND_CS8404_DECODE snd_cs8404_decode_spdif_bits
#endif
#ifndef SND_CS8404_ENCODE
#define SND_CS8404_ENCODE snd_cs8404_encode_spdif_bits
#endif
SND_CS8404_DECL void SND_CS8404_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
{
if (bits & 0x10) { /* consumer */
if (!(bits & 0x20))
diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
if (!(bits & 0x40))
diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015;
if (!(bits & 0x80))
diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
switch (bits & 0x03) {
case 0x00: diga->status[1] |= IEC958_AES1_CON_DAT; break;
case 0x03: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
}
switch (bits & 0x06) {
case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
case 0x06: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
}
} else {
diga->status[0] = IEC958_AES0_PROFESSIONAL;
if (!(bits & 0x04))
diga->status[0] |= IEC958_AES0_NONAUDIO;
switch (bits & 0x60) {
case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
case 0x40: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
case 0x20: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
case 0x60: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
}
switch (bits & 0x03) {
case 0x02: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
case 0x01: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
case 0x03: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
}
if (!(bits & 0x80))
diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
}
}
SND_CS8404_DECL unsigned char SND_CS8404_ENCODE(struct snd_aes_iec958 *diga)
{
unsigned char bits;
if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
bits = 0x10; /* consumer mode */
if (!(diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT))
bits |= 0x20;
if ((diga->status[0] & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_NONE)
bits |= 0x40;
if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL))
bits |= 0x80;
if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
bits |= 0x03;
switch (diga->status[3] & IEC958_AES3_CON_FS) {
default:
case IEC958_AES3_CON_FS_44100: bits |= 0x06; break;
case IEC958_AES3_CON_FS_48000: bits |= 0x04; break;
case IEC958_AES3_CON_FS_32000: bits |= 0x02; break;
}
} else {
bits = 0x00; /* professional mode */
if (!(diga->status[0] & IEC958_AES0_NONAUDIO))
bits |= 0x04;
switch (diga->status[0] & IEC958_AES0_PRO_FS) {
case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
case IEC958_AES0_PRO_FS_44100: bits |= 0x40; break; /* 44.1kHz */
case IEC958_AES0_PRO_FS_48000: bits |= 0x20; break; /* 48kHz */
default:
case IEC958_AES0_PRO_FS_NOTID: bits |= 0x00; break;
}
switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x02; break;
case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x01; break;
case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
default:
case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x03; break;
}
switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
case IEC958_AES1_PRO_MODE_TWO:
case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
default: bits |= 0x80; break;
}
}
return bits;
}
#endif /* SND_CS8404 */
#endif /* __SOUND_CS8403_H */