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amp.c

/*
 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
 *
 *   Lowlevel functions for Advanced Micro Peripherals Ltd AUDIO2000
 *
 *    Copyright (c) 2000 Jaroslav Kysela <perex@suse.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 <sound/driver.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>

#include "ice1712.h"
#include "envy24ht.h"
#include "amp.h"

static void wm_put(ice1712_t *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(ice1712_t *ice)
{
      static 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 */

      ice->num_total_dacs = 2;      /* only PSDOUT0 is connected */
      ice->num_total_adcs = 2;

      /* Chaintech AV-710 has another codecs, which need initialization */
      /* initialize WM8728 codec */
      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(ice1712_t *ice)
{
      /* 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 */
};


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