text: /*
   *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
   *
   *   Lowlevel functions for Advanced Micro Peripherals Ltd AUDIO2000
   *
   *	Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   *
   *   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
   *
   */      
  
  #include <asm/io.h>
  #include <linux/delay.h>
  #include <linux/interrupt.h>
  #include <linux/init.h>
  #include <sound/core.h>
  
  #include "ice1712.h"
  #include "envy24ht.h"
  #include "amp.h"
  
  static void wm_put(struct snd_ice1712 *ice, int reg, unsigned short val)
  {
  	unsigned short cval;
  	cval = (reg << 9) | val;
  	snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
  }
  
  static int __devinit snd_vt1724_amp_init(struct snd_ice1712 *ice)
  {
  	static const unsigned short wm_inits[] = {
  		WM_ATTEN_L,	0x0000,	/* 0 db */
  		WM_ATTEN_R,	0x0000,	/* 0 db */
  		WM_DAC_CTRL,	0x0008,	/* 24bit I2S */
  		WM_INT_CTRL,	0x0001, /* 24bit I2S */	
  	};
  
  	unsigned int i;
  
  	/* only use basic functionality for now */
  
  	/* VT1616 6ch codec connected to PSDOUT0 using packed mode */
  	ice->num_total_dacs = 6;
  	ice->num_total_adcs = 2;
  
  	/* Chaintech AV-710 has another WM8728 codec connected to PSDOUT4
  	   (shared with the SPDIF output). Mixer control for this codec
  	   is not yet supported. */
  	if (ice->eeprom.subvendor == VT1724_SUBDEVICE_AV710) {
  		for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
  			wm_put(ice, wm_inits[i], wm_inits[i+1]);
  	}
  
  	return 0;
  }
  
  static int __devinit snd_vt1724_amp_add_controls(struct snd_ice1712 *ice)
  {
  	if (ice->ac97)
  		/* we use pins 39 and 41 of the VT1616 for left and right
  		read outputs */
  		snd_ac97_write_cache(ice->ac97, 0x5a,
  			snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
  	return 0;
  }
  
  
  /* entry point */
  struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
  	{
  		.subvendor = VT1724_SUBDEVICE_AV710,
  		.name = "Chaintech AV-710",
  		.model = "av710",
  		.chip_init = snd_vt1724_amp_init,
  		.build_controls = snd_vt1724_amp_add_controls,
  	},
  	{
  		.subvendor = VT1724_SUBDEVICE_AUDIO2000,
  		.name = "AMP Ltd AUDIO2000",
  		.model = "amp2000",
  		.chip_init = snd_vt1724_amp_init,
  		.build_controls = snd_vt1724_amp_add_controls,
  	},
  	{ } /* terminator */
  };
  
  