feddfdb2d9
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30771 a1c6a512-1295-4272-9138-f99709370657
136 lines
4 KiB
C
136 lines
4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Gigabeat S specific code for the WM8978 codec
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*
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* Copyright (C) 2008 Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "audiohw.h"
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#include "wmcodec.h"
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#include "audio.h"
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#include "i2s.h"
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#include "i2c-imx31.h"
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static struct i2c_node wm8978_i2c_node =
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{
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.num = I2C1_NUM,
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.ifdr = I2C_IFDR_DIV192, /* 66MHz/.4MHz = 165, closest = 192 = 343750Hz */
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.addr = WMC_I2C_ADDR,
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};
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/* For 16.9344MHz MCLK, codec as master. */
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const struct wmc_srctrl_entry wmc_srctrl_table[HW_NUM_FREQ] =
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{
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[HW_FREQ_8] = /* PLL = 65.536MHz */
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{
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.plln = 7 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2f, /* 12414886 */
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.pllk2 = 0x0b7,
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.pllk3 = 0x1a6,
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.mclkdiv = WMC_MCLKDIV_8, /* 2.0480 MHz */
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.filter = WMC_SR_8KHZ,
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},
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[HW_FREQ_11] = /* PLL = off */
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{
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.mclkdiv = WMC_MCLKDIV_6, /* 2.8224 MHz */
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.filter = WMC_SR_12KHZ,
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},
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[HW_FREQ_12] = /* PLL = 73.728 MHz */
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{
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.plln = 8 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2d, /* 11869595 */
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.pllk2 = 0x08e,
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.pllk3 = 0x19b,
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.mclkdiv = WMC_MCLKDIV_6, /* 3.0720 MHz */
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.filter = WMC_SR_12KHZ,
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},
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[HW_FREQ_16] = /* PLL = 65.536MHz */
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{
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.plln = 7 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2f, /* 12414886 */
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.pllk2 = 0x0b7,
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.pllk3 = 0x1a6,
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.mclkdiv = WMC_MCLKDIV_4, /* 4.0960 MHz */
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.filter = WMC_SR_16KHZ,
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},
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[HW_FREQ_22] = /* PLL = off */
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{
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.mclkdiv = WMC_MCLKDIV_3, /* 5.6448 MHz */
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.filter = WMC_SR_24KHZ,
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},
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[HW_FREQ_24] = /* PLL = 73.728 MHz */
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{
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.plln = 8 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2d, /* 11869595 */
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.pllk2 = 0x08e,
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.pllk3 = 0x19b,
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.mclkdiv = WMC_MCLKDIV_3, /* 6.1440 MHz */
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.filter = WMC_SR_24KHZ,
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},
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[HW_FREQ_32] = /* PLL = 65.536MHz */
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{
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.plln = 7 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2f, /* 12414886 */
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.pllk2 = 0x0b7,
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.pllk3 = 0x1a6,
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.mclkdiv = WMC_MCLKDIV_2, /* 8.1920 MHz */
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.filter = WMC_SR_32KHZ,
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},
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[HW_FREQ_44] = /* PLL = off */
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{
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.mclkdiv = WMC_MCLKDIV_1_5, /* 11.2896 MHz */
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.filter = WMC_SR_48KHZ,
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},
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[HW_FREQ_48] = /* PLL = 73.728 MHz */
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{
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.plln = 8 | WMC_PLL_PRESCALE,
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.pllk1 = 0x2d, /* 11869595 */
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.pllk2 = 0x08e,
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.pllk3 = 0x19b,
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.mclkdiv = WMC_MCLKDIV_1_5, /* 12.2880 MHz */
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.filter = WMC_SR_48KHZ,
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},
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};
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void audiohw_init(void)
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{
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i2s_reset();
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i2c_enable_node(&wm8978_i2c_node, true);
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audiohw_preinit();
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bitset32(&GPIO3_DR, (1 << 21)); /* Turn on analogue LDO */
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}
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void audiohw_enable_headphone_jack(bool enable)
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{
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/* Turn headphone jack output on or off. */
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bitmod32(&GPIO3_DR, enable ? (1 << 22) : 0, (1 << 22));
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}
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void wmcodec_write(int reg, int data)
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{
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unsigned char d[2];
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/* |aaaaaaad|dddddddd| */
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d[0] = (reg << 1) | ((data & 0x100) >> 8);
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d[1] = data;
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i2c_write(&wm8978_i2c_node, d, 2);
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}
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