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amp.c
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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 <[email protected]>
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  if (ice->ac97)
72  /* we use pins 39 and 41 of the VT1616 for left and right
73  read outputs */
74  snd_ac97_write_cache(ice->ac97, 0x5a,
75  snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
76  return 0;
77 }
78 
79 
80 /* entry point */
82  {
83  .subvendor = VT1724_SUBDEVICE_AV710,
84  .name = "Chaintech AV-710",
85  .model = "av710",
86  .chip_init = snd_vt1724_amp_init,
87  .build_controls = snd_vt1724_amp_add_controls,
88  },
89  {
90  .subvendor = VT1724_SUBDEVICE_AUDIO2000,
91  .name = "AMP Ltd AUDIO2000",
92  .model = "amp2000",
93  .chip_init = snd_vt1724_amp_init,
94  .build_controls = snd_vt1724_amp_add_controls,
95  },
96  { } /* terminator */
97 };
98