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Diffstat (limited to 'include/sound/cs8403.h')
-rw-r--r-- | include/sound/cs8403.h | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/include/sound/cs8403.h b/include/sound/cs8403.h new file mode 100644 index 00000000..3a8c174a --- /dev/null +++ b/include/sound/cs8403.h @@ -0,0 +1,257 @@ +#ifndef __SOUND_CS8403_H +#define __SOUND_CS8403_H + +/* + * Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter + * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, + * Takashi Iwai <tiwai@suse.de> + * + * + * 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 */ |