[ALSA] ASoC S3C24xx machine drivers - Openmoko Neo1973
This patch adds ALSA support for the Openmoko Neo1973 phone. Features:- * HiFi Playback and capture. * Phone calls supported. * Support for BT PCM in WM8753 voice interface. * Support for LM4857 audio amp. Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Graeme Gregory
Jaroslav Kysela
parent
050f05eaec
commit
74930bb6db
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@ -0,0 +1,670 @@
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/*
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* neo1973_wm8753.c -- SoC audio for Neo1973
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*
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory
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* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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*
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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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*
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* Revision history
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* 20th Jan 2007 Initial version.
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* 05th Feb 2007 Rename all to Neo1973
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*
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*/
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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/i2c.h>
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#include <sound/driver.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 <sound/soc-dapm.h>
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#include <asm/mach-types.h>
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#include <asm/hardware/scoop.h>
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#include <asm/arch/regs-iis.h>
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#include <asm/arch/regs-clock.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/hardware.h>
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#include <asm/arch/audio.h>
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#include <asm/io.h>
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#include <asm/arch/spi-gpio.h>
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#include "../codecs/wm8753.h"
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#include "lm4857.h"
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#include "s3c24xx-pcm.h"
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#include "s3c24xx-i2s.h"
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/* define the scenarios */
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#define NEO_AUDIO_OFF 0
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#define NEO_GSM_CALL_AUDIO_HANDSET 1
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#define NEO_GSM_CALL_AUDIO_HEADSET 2
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#define NEO_GSM_CALL_AUDIO_BLUETOOTH 3
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#define NEO_STEREO_TO_SPEAKERS 4
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#define NEO_STEREO_TO_HEADPHONES 5
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#define NEO_CAPTURE_HANDSET 6
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#define NEO_CAPTURE_HEADSET 7
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#define NEO_CAPTURE_BLUETOOTH 8
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static struct snd_soc_machine neo1973;
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static struct i2c_client *i2c;
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static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
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unsigned int pll_out = 0, bclk = 0;
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int ret = 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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case 8000:
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case 16000:
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pll_out = 12288000;
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break;
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case 48000:
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bclk = WM8753_BCLK_DIV_4;
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pll_out = 12288000;
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break;
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case 96000:
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bclk = WM8753_BCLK_DIV_2;
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pll_out = 12288000;
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break;
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case 11025:
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bclk = WM8753_BCLK_DIV_16;
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pll_out = 11289600;
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break;
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case 22050:
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bclk = WM8753_BCLK_DIV_8;
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pll_out = 11289600;
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break;
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case 44100:
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bclk = WM8753_BCLK_DIV_4;
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pll_out = 11289600;
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break;
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case 88200:
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bclk = WM8753_BCLK_DIV_2;
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pll_out = 11289600;
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break;
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}
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/* set codec DAI configuration */
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ret = codec_dai->dai_ops.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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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = cpu_dai->dai_ops.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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if (ret < 0)
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return ret;
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/* set the codec system clock for DAC and ADC */
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ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_MCLK, pll_out,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* set MCLK division for sample rate */
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ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
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S3C2410_IISMOD_32FS );
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if (ret < 0)
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return ret;
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/* set codec BCLK division for sample rate */
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ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
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if (ret < 0)
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return ret;
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/* set prescaler division for sample rate */
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ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
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S3C24XX_PRESCALE(4,4));
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if (ret < 0)
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return ret;
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/* codec PLL input is PCLK/4 */
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ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1,
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iis_clkrate / 4, pll_out);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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/* disable the PLL */
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return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1, 0, 0);
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}
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/*
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* Neo1973 WM8753 HiFi DAI opserations.
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*/
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static struct snd_soc_ops neo1973_hifi_ops = {
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.hw_params = neo1973_hifi_hw_params,
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.hw_free = neo1973_hifi_hw_free,
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};
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static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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unsigned int pcmdiv = 0;
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int ret = 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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return -EINVAL;
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if (params_channels(params) != 1)
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return -EINVAL;
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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 = codec_dai->dai_ops.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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if (ret < 0)
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return ret;
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/* set the codec system clock for DAC and ADC */
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ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* set codec PCM division for sample rate */
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ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
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if (ret < 0)
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return ret;
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/* configue and enable PLL for 12.288MHz output */
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ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2,
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iis_clkrate / 4, 12288000);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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/* disable the PLL */
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return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2, 0, 0);
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}
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static struct snd_soc_ops neo1973_voice_ops = {
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.hw_params = neo1973_voice_hw_params,
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.hw_free = neo1973_voice_hw_free,
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};
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static int neo1973_scenario = 0;
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static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.integer.value[0] = neo1973_scenario;
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return 0;
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}
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static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
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{
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switch(neo1973_scenario) {
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case NEO_AUDIO_OFF:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_GSM_CALL_AUDIO_HANDSET:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
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break;
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case NEO_GSM_CALL_AUDIO_HEADSET:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_GSM_CALL_AUDIO_BLUETOOTH:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_STEREO_TO_SPEAKERS:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_STEREO_TO_HEADPHONES:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_CAPTURE_HANDSET:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
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break;
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case NEO_CAPTURE_HEADSET:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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case NEO_CAPTURE_BLUETOOTH:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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break;
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default:
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snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
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snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
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snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
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snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
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}
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snd_soc_dapm_sync_endpoints(codec);
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return 0;
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}
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static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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if (neo1973_scenario == ucontrol->value.integer.value[0])
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return 0;
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neo1973_scenario = ucontrol->value.integer.value[0];
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set_scenario_endpoints(codec, neo1973_scenario);
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return 1;
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}
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static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
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static void lm4857_write_regs(void)
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{
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if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
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printk(KERN_ERR "lm4857: i2c write failed\n");
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}
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static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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int reg=kcontrol->private_value & 0xFF;
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int shift = (kcontrol->private_value >> 8) & 0x0F;
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int mask = (kcontrol->private_value >> 16) & 0xFF;
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ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
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return 0;
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}
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static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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int reg = kcontrol->private_value & 0xFF;
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int shift = (kcontrol->private_value >> 8) & 0x0F;
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int mask = (kcontrol->private_value >> 16) & 0xFF;
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if (((lm4857_regs[reg] >> shift ) & mask) ==
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ucontrol->value.integer.value[0])
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return 0;
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lm4857_regs[reg] &= ~ (mask << shift);
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lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
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lm4857_write_regs();
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return 1;
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}
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static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
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if (value)
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value -= 5;
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ucontrol->value.integer.value[0] = value;
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return 0;
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}
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static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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u8 value = ucontrol->value.integer.value[0];
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if (value)
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value += 5;
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if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
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return 0;
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lm4857_regs[LM4857_CTRL] &= 0xF0;
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lm4857_regs[LM4857_CTRL] |= value;
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lm4857_write_regs();
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return 1;
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}
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static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
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SND_SOC_DAPM_LINE("Audio Out", NULL),
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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("Call Mic", NULL),
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};
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/* example machine audio_mapnections */
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static const char* audio_map[][3] = {
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/* Connections to the lm4857 amp */
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{"Audio Out", NULL, "LOUT1"},
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{"Audio 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 */
|
||||
{"MIC1", NULL, "Mic Bias"},
|
||||
{"Mic Bias", NULL, "Headset Mic"},
|
||||
|
||||
/* Call Mic */
|
||||
{"MIC2", NULL, "Mic Bias"},
|
||||
{"MIC2N", NULL, "Mic Bias"},
|
||||
{"Mic Bias", NULL, "Call Mic"},
|
||||
|
||||
/* Connect the ALC pins */
|
||||
{"ACIN", NULL, "ACOP"},
|
||||
|
||||
{NULL, NULL, NULL},
|
||||
};
|
||||
|
||||
static const char *lm4857_mode[] = {
|
||||
"Off",
|
||||
"Call Speaker",
|
||||
"Stereo Speakers",
|
||||
"Stereo Speakers + Headphones",
|
||||
"Headphones"
|
||||
};
|
||||
|
||||
static const struct soc_enum lm4857_mode_enum[] = {
|
||||
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
|
||||
};
|
||||
|
||||
static const char *neo_scenarios[] = {
|
||||
"Off",
|
||||
"GSM Handset",
|
||||
"GSM Headset",
|
||||
"GSM Bluetooth",
|
||||
"Speakers",
|
||||
"Headphones",
|
||||
"Capture Handset",
|
||||
"Capture Headset",
|
||||
"Capture Bluetooth"
|
||||
};
|
||||
|
||||
static const struct soc_enum neo_scenario_enum[] = {
|
||||
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios),neo_scenarios),
|
||||
};
|
||||
|
||||
static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
|
||||
SOC_SINGLE_EXT("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_SINGLE_EXT("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_SINGLE_EXT("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
|
||||
lm4857_get_mode, lm4857_set_mode),
|
||||
SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
|
||||
neo1973_get_scenario, neo1973_set_scenario),
|
||||
SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
|
||||
lm4857_get_reg, lm4857_set_reg),
|
||||
};
|
||||
|
||||
/*
|
||||
* This is an example machine initialisation for a wm8753 connected to a
|
||||
* neo1973 II. It is missing logic to detect hp/mic insertions and logic
|
||||
* to re-route the audio in such an event.
|
||||
*/
|
||||
static int neo1973_wm8753_init(struct snd_soc_codec *codec)
|
||||
{
|
||||
int i, err;
|
||||
|
||||
/* set up NC codec pins */
|
||||
snd_soc_dapm_set_endpoint(codec, "LOUT2", 0);
|
||||
snd_soc_dapm_set_endpoint(codec, "ROUT2", 0);
|
||||
snd_soc_dapm_set_endpoint(codec, "OUT3", 0);
|
||||
snd_soc_dapm_set_endpoint(codec, "OUT4", 0);
|
||||
snd_soc_dapm_set_endpoint(codec, "LINE1", 0);
|
||||
snd_soc_dapm_set_endpoint(codec, "LINE2", 0);
|
||||
|
||||
|
||||
/* set endpoints to default mode */
|
||||
set_scenario_endpoints(codec, NEO_AUDIO_OFF);
|
||||
|
||||
/* Add neo1973 specific widgets */
|
||||
for (i = 0; i < ARRAY_SIZE(wm8753_dapm_widgets); i++)
|
||||
snd_soc_dapm_new_control(codec, &wm8753_dapm_widgets[i]);
|
||||
|
||||
/* add neo1973 specific controls */
|
||||
for (i = 0; i < ARRAY_SIZE(wm8753_neo1973_controls); i++) {
|
||||
err = snd_ctl_add(codec->card,
|
||||
snd_soc_cnew(&wm8753_neo1973_controls[i],
|
||||
codec, NULL));
|
||||
if (err < 0)
|
||||
return err;
|
||||
}
|
||||
|
||||
/* set up neo1973 specific audio path audio_mapnects */
|
||||
for (i = 0; audio_map[i][0] != NULL; i++) {
|
||||
snd_soc_dapm_connect_input(codec, audio_map[i][0],
|
||||
audio_map[i][1], audio_map[i][2]);
|
||||
}
|
||||
|
||||
snd_soc_dapm_sync_endpoints(codec);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* BT Codec DAI
|
||||
*/
|
||||
static struct snd_soc_cpu_dai bt_dai =
|
||||
{ .name = "Bluetooth",
|
||||
.id = 0,
|
||||
.type = SND_SOC_DAI_PCM,
|
||||
.playback = {
|
||||
.channels_min = 1,
|
||||
.channels_max = 1,
|
||||
.rates = SNDRV_PCM_RATE_8000,
|
||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
||||
.capture = {
|
||||
.channels_min = 1,
|
||||
.channels_max = 1,
|
||||
.rates = SNDRV_PCM_RATE_8000,
|
||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
||||
};
|
||||
|
||||
static struct snd_soc_dai_link neo1973_dai[] = {
|
||||
{ /* Hifi Playback - for similatious use with voice below */
|
||||
.name = "WM8753",
|
||||
.stream_name = "WM8753 HiFi",
|
||||
.cpu_dai = &s3c24xx_i2s_dai,
|
||||
.codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
|
||||
.init = neo1973_wm8753_init,
|
||||
.ops = &neo1973_hifi_ops,
|
||||
},
|
||||
{ /* Voice via BT */
|
||||
.name = "Bluetooth",
|
||||
.stream_name = "Voice",
|
||||
.cpu_dai = &bt_dai,
|
||||
.codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
|
||||
.ops = &neo1973_voice_ops,
|
||||
},
|
||||
};
|
||||
|
||||
static struct snd_soc_machine neo1973 = {
|
||||
.name = "neo1973",
|
||||
.dai_link = neo1973_dai,
|
||||
.num_links = ARRAY_SIZE(neo1973_dai),
|
||||
};
|
||||
|
||||
static struct wm8753_setup_data neo1973_wm8753_setup = {
|
||||
.i2c_address = 0x1a,
|
||||
};
|
||||
|
||||
static struct snd_soc_device neo1973_snd_devdata = {
|
||||
.machine = &neo1973,
|
||||
.platform = &s3c24xx_soc_platform,
|
||||
.codec_dev = &soc_codec_dev_wm8753,
|
||||
.codec_data = &neo1973_wm8753_setup,
|
||||
};
|
||||
|
||||
static struct i2c_client client_template;
|
||||
|
||||
static unsigned short normal_i2c[] = { 0x7C, I2C_CLIENT_END };
|
||||
|
||||
/* Magic definition of all other variables and things */
|
||||
I2C_CLIENT_INSMOD;
|
||||
|
||||
static int lm4857_amp_probe(struct i2c_adapter *adap, int addr, int kind)
|
||||
{
|
||||
int ret;
|
||||
|
||||
client_template.adapter = adap;
|
||||
client_template.addr = addr;
|
||||
|
||||
i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
|
||||
if (i2c == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = i2c_attach_client(i2c);
|
||||
if (ret < 0) {
|
||||
printk(KERN_ERR "LM4857 failed to attach at addr %x\n", addr);
|
||||
goto exit_err;
|
||||
}
|
||||
|
||||
lm4857_write_regs();
|
||||
return ret;
|
||||
|
||||
exit_err:
|
||||
kfree(i2c);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int lm4857_i2c_detach(struct i2c_client *client)
|
||||
{
|
||||
i2c_detach_client(client);
|
||||
kfree(client);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lm4857_i2c_attach(struct i2c_adapter *adap)
|
||||
{
|
||||
return i2c_probe(adap, &addr_data, lm4857_amp_probe);
|
||||
}
|
||||
|
||||
/* corgi i2c codec control layer */
|
||||
static struct i2c_driver lm4857_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "LM4857 I2C Amp",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.id = I2C_DRIVERID_LM4857,
|
||||
.attach_adapter = lm4857_i2c_attach,
|
||||
.detach_client = lm4857_i2c_detach,
|
||||
.command = NULL,
|
||||
};
|
||||
|
||||
static struct i2c_client client_template = {
|
||||
.name = "LM4857",
|
||||
.driver = &lm4857_i2c_driver,
|
||||
};
|
||||
|
||||
static struct platform_device *neo1973_snd_device;
|
||||
|
||||
static int __init neo1973_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
neo1973_snd_device = platform_device_alloc("soc-audio", -1);
|
||||
if (!neo1973_snd_device)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(neo1973_snd_device, &neo1973_snd_devdata);
|
||||
neo1973_snd_devdata.dev = &neo1973_snd_device->dev;
|
||||
ret = platform_device_add(neo1973_snd_device);
|
||||
|
||||
if (ret)
|
||||
platform_device_put(neo1973_snd_device);
|
||||
|
||||
ret = i2c_add_driver(&lm4857_i2c_driver);
|
||||
if (ret != 0)
|
||||
printk(KERN_ERR "can't add i2c driver");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit neo1973_exit(void)
|
||||
{
|
||||
platform_device_unregister(neo1973_snd_device);
|
||||
}
|
||||
|
||||
module_init(neo1973_init);
|
||||
module_exit(neo1973_exit);
|
||||
|
||||
/* Module information */
|
||||
MODULE_AUTHOR("Graeme Gregory, graeme.gregory@wolfsonmicro.com, www.wolfsonmicro.com");
|
||||
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue