release/src-rt-6.x.4708/linux/linux-2.6.36/sound/pci/ice1712/amp.c

   1 /*
   2  *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
   3  *
   4  *   Lowlevel functions for Advanced Micro Peripherals Ltd AUDIO2000
   5  *
   6  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 #include <asm/io.h>
  25 #include <linux/delay.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/init.h>
  28 #include <sound/core.h>
  29
  30 #include "ice1712.h"
  31 #include "envy24ht.h"
  32 #include "amp.h"
  33
  34 static void wm_put(struct snd_ice1712 *ice, int reg, unsigned short val)
  35 {
  36         unsigned short cval;
  37         cval = (reg << 9) | val;
  38         snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
  39 }
  40
  41 static int __devinit snd_vt1724_amp_init(struct snd_ice1712 *ice)
  42 {
  43         static const unsigned short wm_inits[] = {
  44                 WM_ATTEN_L,     0x0000, /* 0 db */
  45                 WM_ATTEN_R,     0x0000, /* 0 db */
  46                 WM_DAC_CTRL,    0x0008, /* 24bit I2S */
  47                 WM_INT_CTRL,    0x0001, /* 24bit I2S */
  48         };
  49
  50         unsigned int i;
  51
  52         /* only use basic functionality for now */
  53
  54         /* VT1616 6ch codec connected to PSDOUT0 using packed mode */
  55         ice->num_total_dacs = 6;
  56         ice->num_total_adcs = 2;
  57
  58         /* Chaintech AV-710 has another WM8728 codec connected to PSDOUT4
  59            (shared with the SPDIF output). Mixer control for this codec
  60            is not yet supported. */
  61         if (ice->eeprom.subvendor == VT1724_SUBDEVICE_AV710) {
  62                 for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
  63                         wm_put(ice, wm_inits[i], wm_inits[i+1]);
  64         }
  65
  66         return 0;
  67 }
  68
  69 static int __devinit snd_vt1724_amp_add_controls(struct snd_ice1712 *ice)
  70 {
  71         /* we use pins 39 and 41 of the VT1616 for left and right read outputs */
  72         snd_ac97_write_cache(ice->ac97, 0x5a, snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
  73         return 0;
  74 }
  75
  76
  77 /* entry point */
  78 struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
  79         {
  80                 .subvendor = VT1724_SUBDEVICE_AV710,
  81                 .name = "Chaintech AV-710",
  82                 .model = "av710",
  83                 .chip_init = snd_vt1724_amp_init,
  84                 .build_controls = snd_vt1724_amp_add_controls,
  85         },
  86         {
  87                 .subvendor = VT1724_SUBDEVICE_AUDIO2000,
  88                 .name = "AMP Ltd AUDIO2000",
  89                 .model = "amp2000",
  90                 .chip_init = snd_vt1724_amp_init,
  91                 .build_controls = snd_vt1724_amp_add_controls,
  92         },
  93         { } /* terminator */
  94 };