cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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cs8403.h (8138B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2#ifndef __SOUND_CS8403_H
      3#define __SOUND_CS8403_H
      4
      5/*
      6 *  Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter
      7 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
      8 *		     Takashi Iwai <tiwai@suse.de>
      9 */
     10
     11#ifdef SND_CS8403
     12
     13#ifndef SND_CS8403_DECL
     14#define SND_CS8403_DECL static
     15#endif
     16#ifndef SND_CS8403_DECODE
     17#define SND_CS8403_DECODE snd_cs8403_decode_spdif_bits
     18#endif
     19#ifndef SND_CS8403_ENCODE
     20#define SND_CS8403_ENCODE snd_cs8403_encode_spdif_bits
     21#endif
     22
     23
     24SND_CS8403_DECL void SND_CS8403_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
     25{
     26	if (bits & 0x01) {	/* consumer */
     27		if (!(bits & 0x02))
     28			diga->status[0] |= IEC958_AES0_NONAUDIO;
     29		if (!(bits & 0x08))
     30			diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
     31		switch (bits & 0x10) {
     32		case 0x10: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; break;
     33		case 0x00: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; break;
     34		}
     35		if (!(bits & 0x80))
     36			diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
     37		switch (bits & 0x60) {
     38		case 0x00: diga->status[1] |= IEC958_AES1_CON_MAGNETIC_ID; break;
     39		case 0x20: diga->status[1] |= IEC958_AES1_CON_DIGDIGCONV_ID; break;
     40		case 0x40: diga->status[1] |= IEC958_AES1_CON_LASEROPT_ID; break;
     41		case 0x60: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
     42		}
     43		switch (bits & 0x06) {
     44		case 0x00: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
     45		case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
     46		case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
     47		}
     48	} else {
     49		diga->status[0] = IEC958_AES0_PROFESSIONAL;
     50		switch (bits & 0x18) {
     51		case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
     52		case 0x10: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
     53		case 0x08: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
     54		case 0x18: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
     55		}
     56		switch (bits & 0x60) {
     57		case 0x20: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
     58		case 0x40: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
     59		case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
     60		case 0x60: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
     61		}
     62		if (bits & 0x80)
     63			diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
     64	}
     65}
     66
     67SND_CS8403_DECL unsigned char SND_CS8403_ENCODE(struct snd_aes_iec958 *diga)
     68{
     69	unsigned char bits;
     70
     71	if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
     72		bits = 0x01;	/* consumer mode */
     73		if (diga->status[0] & IEC958_AES0_NONAUDIO)
     74			bits &= ~0x02;
     75		else
     76			bits |= 0x02;
     77		if (diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT)
     78			bits &= ~0x08;
     79		else
     80			bits |= 0x08;
     81		switch (diga->status[0] & IEC958_AES0_CON_EMPHASIS) {
     82		default:
     83		case IEC958_AES0_CON_EMPHASIS_NONE: bits |= 0x10; break;
     84		case IEC958_AES0_CON_EMPHASIS_5015: bits |= 0x00; break;
     85		}
     86		if (diga->status[1] & IEC958_AES1_CON_ORIGINAL)
     87			bits &= ~0x80;
     88		else
     89			bits |= 0x80;
     90		if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
     91			bits |= 0x60;
     92		else {
     93			switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) {
     94			case IEC958_AES1_CON_MAGNETIC_ID:
     95				bits |= 0x00; break;
     96			case IEC958_AES1_CON_DIGDIGCONV_ID:
     97				bits |= 0x20; break;
     98			default:
     99			case IEC958_AES1_CON_LASEROPT_ID:
    100				bits |= 0x40; break;
    101			}
    102		}
    103		switch (diga->status[3] & IEC958_AES3_CON_FS) {
    104		default:
    105		case IEC958_AES3_CON_FS_44100: bits |= 0x00; break;
    106		case IEC958_AES3_CON_FS_48000: bits |= 0x02; break;
    107		case IEC958_AES3_CON_FS_32000: bits |= 0x04; break;
    108		}
    109	} else {
    110		bits = 0x00;	/* professional mode */
    111		if (diga->status[0] & IEC958_AES0_NONAUDIO)
    112			bits &= ~0x02;
    113		else
    114			bits |= 0x02;
    115		/* CHECKME: I'm not sure about the bit order in val here */
    116		switch (diga->status[0] & IEC958_AES0_PRO_FS) {
    117		case IEC958_AES0_PRO_FS_32000:	bits |= 0x00; break;
    118		case IEC958_AES0_PRO_FS_44100:	bits |= 0x10; break;	/* 44.1kHz */
    119		case IEC958_AES0_PRO_FS_48000:	bits |= 0x08; break;	/* 48kHz */
    120		default:
    121		case IEC958_AES0_PRO_FS_NOTID: bits |= 0x18; break;
    122		}
    123		switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
    124		case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x20; break;
    125		case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x40; break;
    126		case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
    127		default:
    128		case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x60; break;
    129		}
    130		switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
    131		case IEC958_AES1_PRO_MODE_TWO:
    132		case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
    133		default: bits |= 0x80; break;
    134		}
    135	}
    136	return bits;
    137}
    138
    139#endif /* SND_CS8403 */
    140
    141#ifdef SND_CS8404
    142
    143#ifndef SND_CS8404_DECL
    144#define SND_CS8404_DECL static
    145#endif
    146#ifndef SND_CS8404_DECODE
    147#define SND_CS8404_DECODE snd_cs8404_decode_spdif_bits
    148#endif
    149#ifndef SND_CS8404_ENCODE
    150#define SND_CS8404_ENCODE snd_cs8404_encode_spdif_bits
    151#endif
    152
    153
    154SND_CS8404_DECL void SND_CS8404_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
    155{
    156	if (bits & 0x10) {	/* consumer */
    157		if (!(bits & 0x20))
    158			diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
    159		if (!(bits & 0x40))
    160			diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015;
    161		if (!(bits & 0x80))
    162			diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
    163		switch (bits & 0x03) {
    164		case 0x00: diga->status[1] |= IEC958_AES1_CON_DAT; break;
    165		case 0x03: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
    166		}
    167		switch (bits & 0x06) {
    168		case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
    169		case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
    170		case 0x06: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
    171		}
    172	} else {
    173		diga->status[0] = IEC958_AES0_PROFESSIONAL;
    174		if (!(bits & 0x04))
    175			diga->status[0] |= IEC958_AES0_NONAUDIO;
    176		switch (bits & 0x60) {
    177		case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
    178		case 0x40: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
    179		case 0x20: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
    180		case 0x60: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
    181		}
    182		switch (bits & 0x03) {
    183		case 0x02: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
    184		case 0x01: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
    185		case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
    186		case 0x03: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
    187		}
    188		if (!(bits & 0x80))
    189			diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
    190	}
    191}
    192
    193SND_CS8404_DECL unsigned char SND_CS8404_ENCODE(struct snd_aes_iec958 *diga)
    194{
    195	unsigned char bits;
    196
    197	if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
    198		bits = 0x10;	/* consumer mode */
    199		if (!(diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT))
    200			bits |= 0x20;
    201		if ((diga->status[0] & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_NONE)
    202			bits |= 0x40;
    203		if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL))
    204			bits |= 0x80;
    205		if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
    206			bits |= 0x03;
    207		switch (diga->status[3] & IEC958_AES3_CON_FS) {
    208		default:
    209		case IEC958_AES3_CON_FS_44100: bits |= 0x06; break;
    210		case IEC958_AES3_CON_FS_48000: bits |= 0x04; break;
    211		case IEC958_AES3_CON_FS_32000: bits |= 0x02; break;
    212		}
    213	} else {
    214		bits = 0x00;	/* professional mode */
    215		if (!(diga->status[0] & IEC958_AES0_NONAUDIO))
    216			bits |= 0x04;
    217		switch (diga->status[0] & IEC958_AES0_PRO_FS) {
    218		case IEC958_AES0_PRO_FS_32000:	bits |= 0x00; break;
    219		case IEC958_AES0_PRO_FS_44100:	bits |= 0x40; break;	/* 44.1kHz */
    220		case IEC958_AES0_PRO_FS_48000:	bits |= 0x20; break;	/* 48kHz */
    221		default:
    222		case IEC958_AES0_PRO_FS_NOTID:	bits |= 0x00; break;
    223		}
    224		switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
    225		case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x02; break;
    226		case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x01; break;
    227		case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
    228		default:
    229		case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x03; break;
    230		}
    231		switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
    232		case IEC958_AES1_PRO_MODE_TWO:
    233		case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
    234		default: bits |= 0x80; break;
    235		}
    236	}
    237	return bits;
    238}
    239
    240#endif /* SND_CS8404 */
    241
    242#endif /* __SOUND_CS8403_H */