/* * ak4535.c -- AK4535 ALSA Soc Audio driver * * Copyright 2005 Openedhand Ltd. * * Author: Richard Purdie * * Based on wm8753.c by Liam Girdwood * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ak4535.h" #define AK4535_VERSION "0.3" struct snd_soc_codec_device soc_codec_dev_ak4535; /* codec private data */ struct ak4535_priv { unsigned int sysclk; }; /* * ak4535 register cache */ static const u16 ak4535_reg[AK4535_CACHEREGNUM] = { 0x0000, 0x0080, 0x0000, 0x0003, 0x0002, 0x0000, 0x0011, 0x0001, 0x0000, 0x0040, 0x0036, 0x0010, 0x0000, 0x0000, 0x0057, 0x0000, }; /* * read ak4535 register cache */ static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { u16 *cache = codec->reg_cache; if (reg >= AK4535_CACHEREGNUM) return -1; return cache[reg]; } static inline unsigned int ak4535_read(struct snd_soc_codec *codec, unsigned int reg) { u8 data; data = reg; if (codec->hw_write(codec->control_data, &data, 1) != 1) return -EIO; if (codec->hw_read(codec->control_data, &data, 1) != 1) return -EIO; return data; }; /* * write ak4535 register cache */ static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec, u16 reg, unsigned int value) { u16 *cache = codec->reg_cache; if (reg >= AK4535_CACHEREGNUM) return; cache[reg] = value; } /* * write to the AK4535 register space */ static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 data[2]; /* data is * D15..D8 AK4535 register offset * D7...D0 register data */ data[0] = reg & 0xff; data[1] = value & 0xff; ak4535_write_reg_cache(codec, reg, value); if (codec->hw_write(codec->control_data, data, 2) == 2) return 0; else return -EIO; } static int ak4535_sync(struct snd_soc_codec *codec) { u16 *cache = codec->reg_cache; int i, r = 0; for (i = 0; i < AK4535_CACHEREGNUM; i++) r |= ak4535_write(codec, i, cache[i]); return r; }; static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"}; static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"}; static const char *ak4535_hp_out[] = {"Stereo", "Mono"}; static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"}; static const char *ak4535_mic_select[] = {"Internal", "External"}; static const struct soc_enum ak4535_enum[] = { SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain), SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out), SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out), SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp), SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select), }; static const struct snd_kcontrol_new ak4535_snd_controls[] = { SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0), SOC_ENUM("Mono 1 Output", ak4535_enum[1]), SOC_ENUM("Mono 1 Gain", ak4535_enum[0]), SOC_ENUM("Headphone Output", ak4535_enum[2]), SOC_ENUM("Playback Deemphasis", ak4535_enum[3]), SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0), SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0), SOC_ENUM("Mic Select", ak4535_enum[4]), SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0), SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0), SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0), SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0), SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0), SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0), SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0), SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1), SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1), SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0), SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0), }; /* Mono 1 Mixer */ static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = { SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0), SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0), }; /* Stereo Mixer */ static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = { SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0), SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0), SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0), }; /* Input Mixer */ static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = { SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0), SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0), }; /* Input mux */ static const struct snd_kcontrol_new ak4535_input_mux_control = SOC_DAPM_ENUM("Input Select", ak4535_enum[4]); /* HP L switch */ static const struct snd_kcontrol_new ak4535_hpl_control = SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1); /* HP R switch */ static const struct snd_kcontrol_new ak4535_hpr_control = SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1); /* mono 2 switch */ static const struct snd_kcontrol_new ak4535_mono2_control = SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0); /* Line out switch */ static const struct snd_kcontrol_new ak4535_line_control = SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0); /* ak4535 dapm widgets */ static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0, &ak4535_stereo_mixer_controls[0], ARRAY_SIZE(ak4535_stereo_mixer_controls)), SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0, &ak4535_mono1_mixer_controls[0], ARRAY_SIZE(ak4535_mono1_mixer_controls)), SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, &ak4535_input_mixer_controls[0], ARRAY_SIZE(ak4535_input_mixer_controls)), SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ak4535_input_mux_control), SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0), SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0, &ak4535_mono2_control), /* speaker powersave bit */ SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0), SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0, &ak4535_line_control), SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0, &ak4535_hpl_control), SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0, &ak4535_hpr_control), SND_SOC_DAPM_OUTPUT("LOUT"), SND_SOC_DAPM_OUTPUT("HPL"), SND_SOC_DAPM_OUTPUT("ROUT"), SND_SOC_DAPM_OUTPUT("HPR"), SND_SOC_DAPM_OUTPUT("SPP"), SND_SOC_DAPM_OUTPUT("SPN"), SND_SOC_DAPM_OUTPUT("MOUT1"), SND_SOC_DAPM_OUTPUT("MOUT2"), SND_SOC_DAPM_OUTPUT("MICOUT"), SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0), SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0), SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0), SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0), SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0), SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0), SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0), SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0), SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0), SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0), SND_SOC_DAPM_INPUT("MICIN"), SND_SOC_DAPM_INPUT("MICEXT"), SND_SOC_DAPM_INPUT("AUX"), SND_SOC_DAPM_INPUT("MIN"), SND_SOC_DAPM_INPUT("AIN"), }; static const struct snd_soc_dapm_route audio_map[] = { /*stereo mixer */ {"Stereo Mixer", "Playback Switch", "DAC"}, {"Stereo Mixer", "Mic Sidetone Switch", "Mic"}, {"Stereo Mixer", "Aux Bypass Switch", "AUX In"}, /* mono1 mixer */ {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"}, {"Mono1 Mixer", "Mono Playback Switch", "DAC"}, /* Mic */ {"Mic", NULL, "AIN"}, {"Input Mux", "Internal", "Mic Int Bias"}, {"Input Mux", "External", "Mic Ext Bias"}, {"Mic Int Bias", NULL, "MICIN"}, {"Mic Ext Bias", NULL, "MICEXT"}, {"MICOUT", NULL, "Input Mux"}, /* line out */ {"LOUT", NULL, "Line Out Enable"}, {"ROUT", NULL, "Line Out Enable"}, {"Line Out Enable", "Switch", "Line Out"}, {"Line Out", NULL, "Stereo Mixer"}, /* mono1 out */ {"MOUT1", NULL, "Mono Out"}, {"Mono Out", NULL, "Mono1 Mixer"}, /* left HP */ {"HPL", NULL, "Left HP Enable"}, {"Left HP Enable", "Switch", "HP L Amp"}, {"HP L Amp", NULL, "Stereo Mixer"}, /* right HP */ {"HPR", NULL, "Right HP Enable"}, {"Right HP Enable", "Switch", "HP R Amp"}, {"HP R Amp", NULL, "Stereo Mixer"}, /* speaker */ {"SPP", NULL, "Speaker Enable"}, {"SPN", NULL, "Speaker Enable"}, {"Speaker Enable", "Switch", "Spk Amp"}, {"Spk Amp", NULL, "MIN"}, /* mono 2 */ {"MOUT2", NULL, "Mono 2 Enable"}, {"Mono 2 Enable", "Switch", "Stereo Mixer"}, /* Aux In */ {"Aux In", NULL, "AUX"}, /* ADC */ {"ADC", NULL, "Input Mixer"}, {"Input Mixer", "Mic Capture Switch", "Mic"}, {"Input Mixer", "Aux Capture Switch", "Aux In"}, }; static int ak4535_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets, ARRAY_SIZE(ak4535_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); snd_soc_dapm_new_widgets(codec); return 0; } static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; struct ak4535_priv *ak4535 = codec->private_data; ak4535->sysclk = freq; return 0; } static int ak4535_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; struct ak4535_priv *ak4535 = codec->private_data; u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5); int rate = params_rate(params), fs = 256; if (rate) fs = ak4535->sysclk / rate; /* set fs */ switch (fs) { case 1024: mode2 |= (0x2 << 5); break; case 512: mode2 |= (0x1 << 5); break; case 256: break; } /* set rate */ ak4535_write(codec, AK4535_MODE2, mode2); return 0; } static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u8 mode1 = 0; /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: mode1 = 0x0002; break; case SND_SOC_DAIFMT_LEFT_J: mode1 = 0x0001; break; default: return -EINVAL; } /* use 32 fs for BCLK to save power */ mode1 |= 0x4; ak4535_write(codec, AK4535_MODE1, mode1); return 0; } static int ak4535_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf; if (!mute) ak4535_write(codec, AK4535_DAC, mute_reg); else ak4535_write(codec, AK4535_DAC, mute_reg | 0x20); return 0; } static int ak4535_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 i; switch (level) { case SND_SOC_BIAS_ON: ak4535_mute(codec->dai, 0); break; case SND_SOC_BIAS_PREPARE: ak4535_mute(codec->dai, 1); break; case SND_SOC_BIAS_STANDBY: i = ak4535_read_reg_cache(codec, AK4535_PM1); ak4535_write(codec, AK4535_PM1, i | 0x80); i = ak4535_read_reg_cache(codec, AK4535_PM2); ak4535_write(codec, AK4535_PM2, i & (~0x80)); break; case SND_SOC_BIAS_OFF: i = ak4535_read_reg_cache(codec, AK4535_PM1); ak4535_write(codec, AK4535_PM1, i & (~0x80)); break; } codec->bias_level = level; return 0; } #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) static struct snd_soc_dai_ops ak4535_dai_ops = { .hw_params = ak4535_hw_params, .set_fmt = ak4535_set_dai_fmt, .digital_mute = ak4535_mute, .set_sysclk = ak4535_set_dai_sysclk, }; struct snd_soc_dai ak4535_dai = { .name = "AK4535", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, .rates = AK4535_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 2, .rates = AK4535_RATES, .formats = SNDRV_PCM_FMTBIT_S16_LE,}, .ops = &ak4535_dai_ops, }; EXPORT_SYMBOL_GPL(ak4535_dai); static int ak4535_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int ak4535_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; ak4535_sync(codec); ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); ak4535_set_bias_level(codec, codec->suspend_bias_level); return 0; } /* * initialise the AK4535 driver * register the mixer and dsp interfaces with the kernel */ static int ak4535_init(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; int ret = 0; codec->name = "AK4535"; codec->owner = THIS_MODULE; codec->read = ak4535_read_reg_cache; codec->write = ak4535_write; codec->set_bias_level = ak4535_set_bias_level; codec->dai = &ak4535_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(ak4535_reg); codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL); if (codec->reg_cache == NULL) return -ENOMEM; /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { printk(KERN_ERR "ak4535: failed to create pcms\n"); goto pcm_err; } /* power on device */ ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); snd_soc_add_controls(codec, ak4535_snd_controls, ARRAY_SIZE(ak4535_snd_controls)); ak4535_add_widgets(codec); ret = snd_soc_init_card(socdev); if (ret < 0) { printk(KERN_ERR "ak4535: failed to register card\n"); goto card_err; } return ret; card_err: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: kfree(codec->reg_cache); return ret; } static struct snd_soc_device *ak4535_socdev; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static int ak4535_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct snd_soc_device *socdev = ak4535_socdev; struct snd_soc_codec *codec = socdev->card->codec; int ret; i2c_set_clientdata(i2c, codec); codec->control_data = i2c; ret = ak4535_init(socdev); if (ret < 0) printk(KERN_ERR "failed to initialise AK4535\n"); return ret; } static int ak4535_i2c_remove(struct i2c_client *client) { struct snd_soc_codec *codec = i2c_get_clientdata(client); kfree(codec->reg_cache); return 0; } static const struct i2c_device_id ak4535_i2c_id[] = { { "ak4535", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id); static struct i2c_driver ak4535_i2c_driver = { .driver = { .name = "AK4535 I2C Codec", .owner = THIS_MODULE, }, .probe = ak4535_i2c_probe, .remove = ak4535_i2c_remove, .id_table = ak4535_i2c_id, }; static int ak4535_add_i2c_device(struct platform_device *pdev, const struct ak4535_setup_data *setup) { struct i2c_board_info info; struct i2c_adapter *adapter; struct i2c_client *client; int ret; ret = i2c_add_driver(&ak4535_i2c_driver); if (ret != 0) { dev_err(&pdev->dev, "can't add i2c driver\n"); return ret; } memset(&info, 0, sizeof(struct i2c_board_info)); info.addr = setup->i2c_address; strlcpy(info.type, "ak4535", I2C_NAME_SIZE); adapter = i2c_get_adapter(setup->i2c_bus); if (!adapter) { dev_err(&pdev->dev, "can't get i2c adapter %d\n", setup->i2c_bus); goto err_driver; } client = i2c_new_device(adapter, &info); i2c_put_adapter(adapter); if (!client) { dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", (unsigned int)info.addr); goto err_driver; } return 0; err_driver: i2c_del_driver(&ak4535_i2c_driver); return -ENODEV; } #endif static int ak4535_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct ak4535_setup_data *setup; struct snd_soc_codec *codec; struct ak4535_priv *ak4535; int ret; printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION); setup = socdev->codec_data; codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); if (codec == NULL) return -ENOMEM; ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL); if (ak4535 == NULL) { kfree(codec); return -ENOMEM; } codec->private_data = ak4535; socdev->card->codec = codec; mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); ak4535_socdev = socdev; ret = -ENODEV; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) if (setup->i2c_address) { codec->hw_write = (hw_write_t)i2c_master_send; codec->hw_read = (hw_read_t)i2c_master_recv; ret = ak4535_add_i2c_device(pdev, setup); } #endif if (ret != 0) { kfree(codec->private_data); kfree(codec); } return ret; } /* power down chip */ static int ak4535_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; if (codec->control_data) ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) if (codec->control_data) i2c_unregister_device(codec->control_data); i2c_del_driver(&ak4535_i2c_driver); #endif kfree(codec->private_data); kfree(codec); return 0; } struct snd_soc_codec_device soc_codec_dev_ak4535 = { .probe = ak4535_probe, .remove = ak4535_remove, .suspend = ak4535_suspend, .resume = ak4535_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535); static int __init ak4535_modinit(void) { return snd_soc_register_dai(&ak4535_dai); } module_init(ak4535_modinit); static void __exit ak4535_exit(void) { snd_soc_unregister_dai(&ak4535_dai); } module_exit(ak4535_exit); MODULE_DESCRIPTION("Soc AK4535 driver"); MODULE_AUTHOR("Richard Purdie"); MODULE_LICENSE("GPL");