ALSA: pcxhr - add support for pcxhr stereo sound cards (mixer part)

- add support for pcxhr stereo cards mixer controls
- adjust tlv db scales to real dBu values
- fix bug with monitoring volume control pcxhr_monitor_vol_put
- do some cleanup
Signed-off-by: NMarkus Bollinger <bollinger@digigram.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/pcxhr/Makefile

-snd-pcxhr-objs := pcxhr.o pcxhr_hwdep.o pcxhr_mixer.o pcxhr_core.o
+snd-pcxhr-objs := pcxhr.o pcxhr_hwdep.o pcxhr_mixer.o pcxhr_core.o pcxhr_mix22.o
 obj-$(CONFIG_SND_PCXHR) += snd-pcxhr.o

sound/pci/pcxhr/pcxhr_mix22.h

+/*
+ * Driver for Digigram pcxhr compatible soundcards
+ *
+ * low level interface with interrupt ans message handling
+ *
+ * Copyright (c) 2004 by Digigram <alsa@digigram.com>
+ *
+ *   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
+ */
+
+#ifndef __SOUND_PCXHR_MIX22_H
+#define __SOUND_PCXHR_MIX22_H
+
+struct pcxhr_mgr;
+
+int hr222_sub_init(struct pcxhr_mgr *mgr);
+int hr222_sub_set_clock(struct pcxhr_mgr *mgr, unsigned int rate,
+			int *changed);
+int hr222_get_external_clock(struct pcxhr_mgr *mgr,
+			     enum pcxhr_clock_type clock_type,
+			     int *sample_rate);
+
+#define HR222_LINE_PLAYBACK_LEVEL_MIN		0	/* -25.5 dB */
+#define HR222_LINE_PLAYBACK_ZERO_LEVEL		51	/* 0.0 dB */
+#define HR222_LINE_PLAYBACK_LEVEL_MAX		99	/* +24.0 dB */
+
+#define HR222_LINE_CAPTURE_LEVEL_MIN		0	/* -111.5 dB */
+#define HR222_LINE_CAPTURE_ZERO_LEVEL		223	/* 0.0 dB */
+#define HR222_LINE_CAPTURE_LEVEL_MAX		255	/* +16 dB */
+#define HR222_MICRO_CAPTURE_LEVEL_MIN		0	/* -98.5 dB */
+#define HR222_MICRO_CAPTURE_LEVEL_MAX		210	/* +6.5 dB */
+
+int hr222_update_analog_audio_level(struct snd_pcxhr *chip,
+				    int is_capture,
+				    int channel);
+int hr222_set_audio_source(struct snd_pcxhr *chip);
+int hr222_iec958_capture_byte(struct snd_pcxhr *chip, int aes_idx,
+			      unsigned char *aes_bits);
+int hr222_iec958_update_byte(struct snd_pcxhr *chip, int aes_idx,
+			     unsigned char aes_bits);
+
+int hr222_add_mic_controls(struct snd_pcxhr *chip);
+
+#endif /* __SOUND_PCXHR_MIX22_H */