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-rw-r--r--include/sound/cs8403.h257
1 files changed, 257 insertions, 0 deletions
diff --git a/include/sound/cs8403.h b/include/sound/cs8403.h
new file mode 100644
index 000000000..3a8c174a4
--- /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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 01:06:28 +0000