firmware/target/arm/ascodec-pp.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for AS3514 audio codec
  11  *
  12  * Copyright (c) 2007 Daniel Ankers
  13  * Copyright (c) 2007 Christian Gmeiner
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24 #include "cpu.h"
  25 #include "system.h"
  26
  27 #include "audiohw.h"
  28 #include "i2s.h"
  29 #include "ascodec-target.h"
  30
  31 /*
  32  * Initialise the PP I2C and I2S.
  33  */
  34 void audiohw_init(void)
  35 {
  36     /* normal outputs for CDI and I2S pin groups */
  37     DEV_INIT2 &= ~0x300;
  38
  39     /*mini2?*/
  40     DEV_INIT1 &=~0x3000000;
  41     /*mini2?*/
  42
  43     /* I2S device reset */
  44     DEV_RS |= DEV_I2S;
  45     DEV_RS &=~DEV_I2S;
  46
  47     /* I2S device enable */
  48     DEV_EN |= DEV_I2S;
  49
  50     /* enable external dev clock clocks */
  51     DEV_EN |= DEV_EXTCLOCKS;
  52
  53     /* external dev clock to 24MHz */
  54     outl(inl(0x70000018) & ~0xc, 0x70000018);
  55
  56 #ifdef SANSA_E200
  57     /* Prevent pops on startup */
  58     GPIOG_ENABLE |= 0x08;
  59     GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
  60     GPIOG_OUTPUT_EN |= 0x08;
  61 #endif
  62
  63     i2s_reset();
  64
  65     audiohw_preinit();
  66 }
  67
  68 void ascodec_suppressor_on(bool on)
  69 {
  70     /* CHECK: Good for c200 too? */
  71 #ifdef SANSA_E200
  72     if (on) {
  73         /* Set pop prevention */
  74         GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
  75     } else {
  76         /* Release pop prevention */
  77         GPIO_CLEAR_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
  78     }
  79 #else
  80     (void)on;
  81 #endif
  82 }