rockbox/firmware/target/arm/ascodec-pp.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Driver for AS3514 audio codec
 *
 * Copyright (c) 2007 Daniel Ankers
 * Copyright (c) 2007 Christian Gmeiner
 *
 * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "cpu.h"
#include "system.h"

#include "audiohw.h"
#include "i2s.h"

/*
 * Initialise the PP I2C and I2S.
 */
void audiohw_init(void)
{
    /* normal outputs for CDI and I2S pin groups */
    DEV_INIT2 &= ~0x300;

    /*mini2?*/
    DEV_INIT1 &=~0x3000000;
    /*mini2?*/

    /* I2S device reset */
    DEV_RS |= DEV_I2S;
    DEV_RS &=~DEV_I2S;

    /* I2S device enable */
    DEV_EN |= DEV_I2S;

    /* enable external dev clock clocks */
    DEV_EN |= DEV_EXTCLOCKS;

    /* external dev clock to 24MHz */
    outl(inl(0x70000018) & ~0xc, 0x70000018);

#ifdef SANSA_E200
    /* Prevent pops on startup */
    GPIOG_ENABLE |= 0x08;
    GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
    GPIOG_OUTPUT_EN |= 0x08;
#endif

    i2s_reset();

    audiohw_preinit();
}

void ascodec_supressor_on(bool on)
{
#ifdef SANSA_E200
    if (on) {
        /* Set pop prevention */
        GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
    } else {
        /* Release pop prevention */
        GPIO_CLEAR_BITWISE(GPIOG_OUTPUT_VAL, 0x08);
    }
#endif
}