neo1973_wm8753.c

linux 内核源代码

/*
 * neo1973_wm8753.c  --  SoC audio for Neo1973
 *
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory
 *         [e-mail] or [e-mail]
 *
 *  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.
 *
 *  Revision history
 *    20th Jan 2007   Initial version.
 *    05th Feb 2007   Rename all to Neo1973
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>
#include <asm/hardware/scoop.h>
#include <asm/arch/regs-iis.h>
#include <asm/arch/regs-clock.h>
#include <asm/arch/regs-gpio.h>
#include <asm/hardware.h>
#include <asm/arch/audio.h>
#include <asm/io.h>
#include <asm/arch/spi-gpio.h>
#include "../codecs/wm8753.h"
#include "lm4857.h"
#include "s3c24xx-pcm.h"
#include "s3c24xx-i2s.h"

/* define the scenarios */
#define NEO_AUDIO_OFF			0
#define NEO_GSM_CALL_AUDIO_HANDSET	1
#define NEO_GSM_CALL_AUDIO_HEADSET	2
#define NEO_GSM_CALL_AUDIO_BLUETOOTH	3
#define NEO_STEREO_TO_SPEAKERS		4
#define NEO_STEREO_TO_HEADPHONES	5
#define NEO_CAPTURE_HANDSET		6
#define NEO_CAPTURE_HEADSET		7
#define NEO_CAPTURE_BLUETOOTH		8

static struct snd_soc_machine neo1973;
static struct i2c_client *i2c;

static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
	struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
	unsigned int pll_out = 0, bclk = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	switch (params_rate(params)) {
	case 8000:
	case 16000:
		pll_out = 12288000;
		break;
	case 48000:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 12288000;
		break;
	case 96000:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 12288000;
		break;
	case 11025:
		bclk = WM8753_BCLK_DIV_16;
		pll_out = 11289600;
		break;
	case 22050:
		bclk = WM8753_BCLK_DIV_8;
		pll_out = 11289600;
		break;
	case 44100:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 11289600;
		break;
	case 88200:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 11289600;
		break;
	}

	/* set codec DAI configuration */
	ret = codec_dai->dai_ops.set_fmt(codec_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set cpu DAI configuration */
	ret = cpu_dai->dai_ops.set_fmt(cpu_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_MCLK, pll_out,
		SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set MCLK division for sample rate */
	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
		S3C2410_IISMOD_32FS );
	if (ret < 0)
		return ret;

	/* set codec BCLK division for sample rate */
	ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
	if (ret < 0)
		return ret;

	/* set prescaler division for sample rate */
	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
		S3C24XX_PRESCALE(4,4));
	if (ret < 0)
		return ret;

	/* codec PLL input is PCLK/4 */
	ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1,
		iis_clkrate / 4, pll_out);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;

	/* disable the PLL */
	return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1, 0, 0);
}

/*
 * Neo1973 WM8753 HiFi DAI opserations.
 */
static struct snd_soc_ops neo1973_hifi_ops = {
	.hw_params = neo1973_hifi_hw_params,
	.hw_free = neo1973_hifi_hw_free,
};

static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
	unsigned int pcmdiv = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	if (params_rate(params) != 8000)
		return -EINVAL;
	if (params_channels(params) != 1)
		return -EINVAL;

	pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */

	/* todo: gg check mode (DSP_B) against CSR datasheet */
	/* set codec DAI configuration */
	ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
		SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set codec PCM division for sample rate */
	ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
	if (ret < 0)
		return ret;

	/* configue and enable PLL for 12.288MHz output */
	ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2,
		iis_clkrate / 4, 12288000);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;

	/* disable the PLL */
	return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2, 0, 0);
}

static struct snd_soc_ops neo1973_voice_ops = {
	.hw_params = neo1973_voice_hw_params,
	.hw_free = neo1973_voice_hw_free,
};

static int neo1973_scenario = 0;

static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = neo1973_scenario;
	return 0;
}

static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
{
	switch(neo1973_scenario) {
	case NEO_AUDIO_OFF:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_GSM_CALL_AUDIO_HANDSET:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  1);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     1);
		break;
	case NEO_GSM_CALL_AUDIO_HEADSET:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  1);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  1);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_GSM_CALL_AUDIO_BLUETOOTH:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  1);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_STEREO_TO_SPEAKERS:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_STEREO_TO_HEADPHONES:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    1);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_CAPTURE_HANDSET:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     1);
		break;
	case NEO_CAPTURE_HEADSET:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  1);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	case NEO_CAPTURE_BLUETOOTH:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
		break;
	default:
		snd_soc_dapm_set_endpoint(codec, "Audio Out",    0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
		snd_soc_dapm_set_endpoint(codec, "GSM Line In",  0);
		snd_soc_dapm_set_endpoint(codec, "Headset Mic",  0);
		snd_soc_dapm_set_endpoint(codec, "Call Mic",     0);
	}

	snd_soc_dapm_sync_endpoints(codec);

	return 0;
}

static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	if (neo1973_scenario == ucontrol->value.integer.value[0])
		return 0;

	neo1973_scenario = ucontrol->value.integer.value[0];
	set_scenario_endpoints(codec, neo1973_scenario);
	return 1;
}

static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};

static void lm4857_write_regs(void)
{
	if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
		printk(KERN_ERR "lm4857: i2c write failed\n");
}

static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int reg=kcontrol->private_value & 0xFF;