| /* 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 */ |