firmware/target/arm/samsung/akcodec-yh82x_yh92x.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (c) 2009 Mark Arigo
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "system.h"
  23 #include "audiohw.h"
  24 #include "i2c-pp.h"
  25 #include "i2s.h"
  26 #include "akcodec.h"
  27
  28 /*#define LOGF_ENABLE*/
  29 #include "logf.h"
  30
  31 #define I2C_AUDIO_ADDRESS 0x10
  32
  33 /*
  34  * Initialise the PP I2C and I2S.
  35  */
  36 void audiohw_init(void)
  37 {
  38     unsigned long tmp;
  39
  40     logf("audiohw_init");
  41
  42     /* I2S device enable */
  43     DEV_EN |= (DEV_I2S | DEV_EXTCLOCKS);
  44
  45     /* I2S device reset */
  46     DEV_RS |=  DEV_I2S;
  47     asm volatile ("nop\n");
  48     DEV_RS &= ~DEV_I2S;
  49
  50     DEV_INIT1 &= ~0x3000000;
  51
  52     tmp = DEV_INIT1;
  53     DEV_INIT1 = tmp;
  54
  55     DEV_INIT2 &= ~0x100;
  56
  57     /* reset the I2S controller into known state */
  58     i2s_reset();
  59
  60     /* this gpio pin maybe powers the codec chip */
  61     GPIOB_ENABLE     |=  0x01;
  62     GPIOB_OUTPUT_EN  |=  0x01;
  63     GPIOB_OUTPUT_VAL |=  0x01;
  64
  65     GPIOL_ENABLE     |=  0x20;
  66     GPIOL_OUTPUT_VAL &= ~0x20;
  67     GPIOL_OUTPUT_EN  |=  0x20;
  68
  69 #ifdef SAMSUNG_YH920
  70     GPO32_ENABLE     |=  0x00000002;
  71     GPO32_VAL        &= ~0x00000002;
  72 #endif
  73
  74     GPO32_VAL        |=  0x00000020;
  75     GPO32_ENABLE     |=  0x00000020;
  76
  77     GPIOF_ENABLE     |=  0x80;
  78     GPIOF_OUTPUT_VAL |=  0x80;
  79     GPIOF_OUTPUT_EN  |=  0x80;
  80
  81     audiohw_preinit();
  82
  83     GPIOL_ENABLE     |=  0x20;
  84     GPIOL_OUTPUT_VAL |=  0x20;
  85     GPIOL_OUTPUT_EN  |=  0x20;
  86 }
  87
  88 void akcodec_close(void)
  89 {
  90     GPIOF_ENABLE     |=  0x80;
  91     GPIOF_OUTPUT_VAL &= ~0x80;
  92     GPIOF_OUTPUT_EN  |=  0x80;
  93
  94     GPIOB_ENABLE     |=  0x01;
  95     GPIOB_OUTPUT_EN  |=  0x01;
  96     GPIOB_OUTPUT_VAL |=  0x01;
  97 }
  98
  99 void akcodec_write(int reg, int data)
 100 {
 101     pp_i2c_send(I2C_AUDIO_ADDRESS, reg, data);
 102 }
 103
 104 int akcodec_read(int reg)
 105 {
 106     return i2c_readbyte(I2C_AUDIO_ADDRESS, reg);
 107 }