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cs8403.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */ #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> */ #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 */