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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Gigabeat S specific code for the WM8978 codec
*
* Copyright (C) 2008 Michael Sevakis
*
* 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 "config.h"
#include "system.h"
#include "audiohw.h"
#include "wmcodec.h"
#include "audio.h"
#include "i2s.h"
#include "i2c-imx31.h"
static struct i2c_node wm8978_i2c_node =
{
.num = I2C1_NUM,
.ifdr = I2C_IFDR_DIV192, /* 66MHz/.4MHz = 165, closest = 192 = 343750Hz */
.addr = WMC_I2C_ADDR,
};
/* For 16.9344MHz MCLK, codec as master. */
const struct wmc_srctrl_entry wmc_srctrl_table[HW_NUM_FREQ] =
{
[HW_FREQ_8] = /* PLL = 65.536MHz */
{
.plln = 7 | WMC_PLL_PRESCALE,
.pllk1 = 0x2f, /* 12414886 */
.pllk2 = 0x0b7,
.pllk3 = 0x1a6,
.mclkdiv = WMC_MCLKDIV_8, /* 2.0480 MHz */
.filter = WMC_SR_8KHZ,
},
[HW_FREQ_11] = /* PLL = off */
{
.mclkdiv = WMC_MCLKDIV_6, /* 2.8224 MHz */
.filter = WMC_SR_12KHZ,
},
[HW_FREQ_12] = /* PLL = 73.728 MHz */
{
.plln = 8 | WMC_PLL_PRESCALE,
.pllk1 = 0x2d, /* 11869595 */
.pllk2 = 0x08e,
.pllk3 = 0x19b,
.mclkdiv = WMC_MCLKDIV_6, /* 3.0720 MHz */
.filter = WMC_SR_12KHZ,
},
[HW_FREQ_16] = /* PLL = 65.536MHz */
{
.plln = 7 | WMC_PLL_PRESCALE,
.pllk1 = 0x2f, /* 12414886 */
.pllk2 = 0x0b7,
.pllk3 = 0x1a6,
.mclkdiv = WMC_MCLKDIV_4, /* 4.0960 MHz */
.filter = WMC_SR_16KHZ,
},
[HW_FREQ_22] = /* PLL = off */
{
.mclkdiv = WMC_MCLKDIV_3, /* 5.6448 MHz */
.filter = WMC_SR_24KHZ,
},
[HW_FREQ_24] = /* PLL = 73.728 MHz */
{
.plln = 8 | WMC_PLL_PRESCALE,
.pllk1 = 0x2d, /* 11869595 */
.pllk2 = 0x08e,
.pllk3 = 0x19b,
.mclkdiv = WMC_MCLKDIV_3, /* 6.1440 MHz */
.filter = WMC_SR_24KHZ,
},
[HW_FREQ_32] = /* PLL = 65.536MHz */
{
.plln = 7 | WMC_PLL_PRESCALE,
.pllk1 = 0x2f, /* 12414886 */
.pllk2 = 0x0b7,
.pllk3 = 0x1a6,
.mclkdiv = WMC_MCLKDIV_2, /* 8.1920 MHz */
.filter = WMC_SR_32KHZ,
},
[HW_FREQ_44] = /* PLL = off */
{
.mclkdiv = WMC_MCLKDIV_1_5, /* 11.2896 MHz */
.filter = WMC_SR_48KHZ,
},
[HW_FREQ_48] = /* PLL = 73.728 MHz */
{
.plln = 8 | WMC_PLL_PRESCALE,
.pllk1 = 0x2d, /* 11869595 */
.pllk2 = 0x08e,
.pllk3 = 0x19b,
.mclkdiv = WMC_MCLKDIV_1_5, /* 12.2880 MHz */
.filter = WMC_SR_48KHZ,
},
};
void audiohw_init(void)
{
i2s_reset();
i2c_enable_node(&wm8978_i2c_node, true);
audiohw_preinit();
bitset32(&GPIO3_DR, (1 << 21)); /* Turn on analogue LDO */
}
void audiohw_enable_headphone_jack(bool enable)
{
/* Turn headphone jack output on or off. */
bitmod32(&GPIO3_DR, enable ? (1 << 22) : 0, (1 << 22));
}
void wmcodec_write(int reg, int data)
{
unsigned char d[2];
/* |aaaaaaad|dddddddd| */
d[0] = (reg << 1) | ((data & 0x100) >> 8);
d[1] = data;
i2c_write(&wm8978_i2c_node, d, 2);
}
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