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* neo1973_gta02_wm8753.c -- SoC audio for Openmoko Freerunner(GTA02)
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* Copyright 2007 Openmoko Inc
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* Author: Graeme Gregory <graeme@openmoko.org>
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory <linux@wolfsonmicro.com>
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* Copyright 2009 Wolfson Microelectronics
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include <plat/regs-iis.h>
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#include <mach/regs-clock.h>
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#include <mach/gta02.h>
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#include "../codecs/wm8753.h"
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#include "s3c24xx-i2s.h"
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static struct snd_soc_card neo1973_gta02;
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static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int pll_out = 0, bclk = 0;
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unsigned long iis_clkrate;
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iis_clkrate = s3c24xx_i2s_get_clockrate();
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switch (params_rate(params)) {
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bclk = WM8753_BCLK_DIV_4;
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bclk = WM8753_BCLK_DIV_2;
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bclk = WM8753_BCLK_DIV_16;
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bclk = WM8753_BCLK_DIV_8;
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bclk = WM8753_BCLK_DIV_4;
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bclk = WM8753_BCLK_DIV_2;
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai,
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SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM);
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai,
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SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM);
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/* set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
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/* set MCLK division for sample rate */
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ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
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S3C2410_IISMOD_32FS);
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/* set codec BCLK division for sample rate */
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ret = snd_soc_dai_set_clkdiv(codec_dai,
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WM8753_BCLKDIV, bclk);
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/* set prescaler division for sample rate */
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ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
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S3C24XX_PRESCALE(4, 4));
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/* codec PLL input is PCLK/4 */
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ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
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iis_clkrate / 4, pll_out);
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static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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/* disable the PLL */
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return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
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* Neo1973 WM8753 HiFi DAI opserations.
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static struct snd_soc_ops neo1973_gta02_hifi_ops = {
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.hw_params = neo1973_gta02_hifi_hw_params,
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.hw_free = neo1973_gta02_hifi_hw_free,
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static int neo1973_gta02_voice_hw_params(
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struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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unsigned int pcmdiv = 0;
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unsigned long iis_clkrate;
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iis_clkrate = s3c24xx_i2s_get_clockrate();
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if (params_rate(params) != 8000)
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if (params_channels(params) != 1)
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pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
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/* todo: gg check mode (DSP_B) against CSR datasheet */
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
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/* set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
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12288000, SND_SOC_CLOCK_IN);
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/* set codec PCM division for sample rate */
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ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
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/* configure and enable PLL for 12.288MHz output */
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ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
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iis_clkrate / 4, 12288000);
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static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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/* disable the PLL */
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return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
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static struct snd_soc_ops neo1973_gta02_voice_ops = {
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.hw_params = neo1973_gta02_voice_hw_params,
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.hw_free = neo1973_gta02_voice_hw_free,
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static u8 lm4853_state;
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/* This has no effect, it exists only to maintain compatibility with
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* existing ALSA state files.
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static int lm4853_set_state(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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int val = ucontrol->value.integer.value[0];
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lm4853_state |= LM4853_AMP;
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lm4853_state &= ~LM4853_AMP;
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static int lm4853_get_state(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;
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static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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int val = ucontrol->value.integer.value[0];
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lm4853_state |= LM4853_SPK;
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gpio_set_value(GTA02_GPIO_HP_IN, 0);
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lm4853_state &= ~LM4853_SPK;
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gpio_set_value(GTA02_GPIO_HP_IN, 1);
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static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;
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static int lm4853_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k,
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gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));
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static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
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SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
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SND_SOC_DAPM_LINE("GSM Line Out", NULL),
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SND_SOC_DAPM_LINE("GSM Line In", NULL),
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SND_SOC_DAPM_MIC("Headset Mic", NULL),
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SND_SOC_DAPM_MIC("Handset Mic", NULL),
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SND_SOC_DAPM_SPK("Handset Spk", NULL),
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/* example machine audio_mapnections */
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static const struct snd_soc_dapm_route audio_map[] = {
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/* Connections to the lm4853 amp */
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{"Stereo Out", NULL, "LOUT1"},
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{"Stereo Out", NULL, "ROUT1"},
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/* Connections to the GSM Module */
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{"GSM Line Out", NULL, "MONO1"},
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{"GSM Line Out", NULL, "MONO2"},
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{"RXP", NULL, "GSM Line In"},
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{"RXN", NULL, "GSM Line In"},
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/* Connections to Headset */
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{"MIC1", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Headset Mic"},
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{"MIC2", NULL, "Mic Bias"},
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{"MIC2N", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Handset Mic"},
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{"Handset Spk", NULL, "LOUT2"},
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{"Handset Spk", NULL, "ROUT2"},
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/* Connect the ALC pins */
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{"ACIN", NULL, "ACOP"},
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static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
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SOC_DAPM_PIN_SWITCH("Stereo Out"),
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SOC_DAPM_PIN_SWITCH("GSM Line Out"),
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SOC_DAPM_PIN_SWITCH("GSM Line In"),
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SOC_DAPM_PIN_SWITCH("Headset Mic"),
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SOC_DAPM_PIN_SWITCH("Handset Mic"),
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SOC_DAPM_PIN_SWITCH("Handset Spk"),
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/* This has no effect, it exists only to maintain compatibility with
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* existing ALSA state files.
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SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
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SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
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* This is an example machine initialisation for a wm8753 connected to a
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static int neo1973_gta02_wm8753_init(struct snd_soc_pcm_runtime *rtd)
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struct snd_soc_codec *codec = rtd->codec;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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/* set up NC codec pins */
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snd_soc_dapm_nc_pin(dapm, "OUT3");
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snd_soc_dapm_nc_pin(dapm, "OUT4");
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snd_soc_dapm_nc_pin(dapm, "LINE1");
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snd_soc_dapm_nc_pin(dapm, "LINE2");
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/* Add neo1973 gta02 specific widgets */
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snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
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ARRAY_SIZE(wm8753_dapm_widgets));
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/* add neo1973 gta02 specific controls */
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err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
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ARRAY_SIZE(wm8753_neo1973_gta02_controls));
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/* set up neo1973 gta02 specific audio path audio_map */
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snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
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/* set endpoints to default off mode */
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snd_soc_dapm_disable_pin(dapm, "Stereo Out");
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snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
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snd_soc_dapm_disable_pin(dapm, "GSM Line In");
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snd_soc_dapm_disable_pin(dapm, "Headset Mic");
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snd_soc_dapm_disable_pin(dapm, "Handset Mic");
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snd_soc_dapm_disable_pin(dapm, "Handset Spk");
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/* allow audio paths from the GSM modem to run during suspend */
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snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
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snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
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snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
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snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
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snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");
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snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");
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snd_soc_dapm_sync(dapm);
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static struct snd_soc_dai_driver bt_dai = {
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.name = "bluetooth-dai",
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.rates = SNDRV_PCM_RATE_8000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.rates = SNDRV_PCM_RATE_8000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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static struct snd_soc_dai_link neo1973_gta02_dai[] = {
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{ /* Hifi Playback - for similatious use with voice below */
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.stream_name = "WM8753 HiFi",
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.cpu_dai_name = "s3c24xx-iis",
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.codec_dai_name = "wm8753-hifi",
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.init = neo1973_gta02_wm8753_init,
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.platform_name = "samsung-audio",
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.codec_name = "wm8753-codec.0-001a",
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.ops = &neo1973_gta02_hifi_ops,
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.stream_name = "Voice",
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.cpu_dai_name = "bluetooth-dai",
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.codec_dai_name = "wm8753-voice",
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.ops = &neo1973_gta02_voice_ops,
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.codec_name = "wm8753-codec.0-001a",
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.platform_name = "samsung-audio",
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static struct snd_soc_card neo1973_gta02 = {
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.name = "neo1973-gta02",
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.dai_link = neo1973_gta02_dai,
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.num_links = ARRAY_SIZE(neo1973_gta02_dai),
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static struct platform_device *neo1973_gta02_snd_device;
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static int __init neo1973_gta02_init(void)
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if (!machine_is_neo1973_gta02()) {
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"Only GTA02 is supported by this ASoC driver\n");
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neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
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if (!neo1973_gta02_snd_device)
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/* register bluetooth DAI here */
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ret = snd_soc_register_dai(&neo1973_gta02_snd_device->dev, &bt_dai);
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platform_set_drvdata(neo1973_gta02_snd_device, &neo1973_gta02);
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ret = platform_device_add(neo1973_gta02_snd_device);
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goto err_unregister_dai;
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/* Initialise GPIOs used by amp */
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ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
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pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
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ret = gpio_direction_output(GTA02_GPIO_HP_IN, 1);
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pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
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goto err_free_gpio_hp_in;
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ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
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pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
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goto err_free_gpio_hp_in;
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ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
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pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
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goto err_free_gpio_amp_shut;
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err_free_gpio_amp_shut:
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gpio_free(GTA02_GPIO_AMP_SHUT);
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gpio_free(GTA02_GPIO_HP_IN);
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platform_device_del(neo1973_gta02_snd_device);
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snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
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platform_device_put(neo1973_gta02_snd_device);
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module_init(neo1973_gta02_init);
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static void __exit neo1973_gta02_exit(void)
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snd_soc_unregister_dai(&neo1973_gta02_snd_device->dev);
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platform_device_unregister(neo1973_gta02_snd_device);
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gpio_free(GTA02_GPIO_HP_IN);
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gpio_free(GTA02_GPIO_AMP_SHUT);
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module_exit(neo1973_gta02_exit);
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/* Module information */
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MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
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MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
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MODULE_LICENSE("GPL");