/* * wm8731.c -- WM8731 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 #include "wm8731.h" struct snd_soc_codec_device soc_codec_dev_wm8731; /* codec private data */ struct wm8731_priv { unsigned int sysclk; }; /* * wm8731 register cache * We can't read the WM8731 register space when we are * using 2 wire for device control, so we cache them instead. * There is no point in caching the reset register */ static const u16 wm8731_reg[WM8731_CACHEREGNUM] = { 0x0097, 0x0097, 0x0079, 0x0079, 0x000a, 0x0008, 0x009f, 0x000a, 0x0000, 0x0000 }; /* * read wm8731 register cache */ static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { u16 *cache = codec->reg_cache; if (reg == WM8731_RESET) return 0; if (reg >= WM8731_CACHEREGNUM) return -1; return cache[reg]; } /* * write wm8731 register cache */ static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec, u16 reg, unsigned int value) { u16 *cache = codec->reg_cache; if (reg >= WM8731_CACHEREGNUM) return; cache[reg] = value; } /* * write to the WM8731 register space */ static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 data[2]; /* data is * D15..D9 WM8731 register offset * D8...D0 register data */ data[0] = (reg << 1) | ((value >> 8) & 0x0001); data[1] = value & 0x00ff; wm8731_write_reg_cache(codec, reg, value); if (codec->hw_write(codec->control_data, data, 2) == 2) return 0; else return -EIO; } #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0) static const char *wm8731_input_select[] = {"Line In", "Mic"}; static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; static const struct soc_enum wm8731_enum[] = { SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select), SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph), }; static const struct snd_kcontrol_new wm8731_snd_controls[] = { SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 0, 127, 0), SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 7, 1, 0), SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0), SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0), SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1), SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1), SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), SOC_ENUM("Playback De-emphasis", wm8731_enum[1]), }; /* Output Mixer */ static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), }; /* Input mux */ static const struct snd_kcontrol_new wm8731_input_mux_controls = SOC_DAPM_ENUM("Input Select", wm8731_enum[0]); static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, &wm8731_output_mixer_controls[0], ARRAY_SIZE(wm8731_output_mixer_controls)), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), SND_SOC_DAPM_OUTPUT("LOUT"), SND_SOC_DAPM_OUTPUT("LHPOUT"), SND_SOC_DAPM_OUTPUT("ROUT"), SND_SOC_DAPM_OUTPUT("RHPOUT"), SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), SND_SOC_DAPM_INPUT("MICIN"), SND_SOC_DAPM_INPUT("RLINEIN"), SND_SOC_DAPM_INPUT("LLINEIN"), }; static const struct snd_soc_dapm_route intercon[] = { /* output mixer */ {"Output Mixer", "Line Bypass Switch", "Line Input"}, {"Output Mixer", "HiFi Playback Switch", "DAC"}, {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, /* outputs */ {"RHPOUT", NULL, "Output Mixer"}, {"ROUT", NULL, "Output Mixer"}, {"LHPOUT", NULL, "Output Mixer"}, {"LOUT", NULL, "Output Mixer"}, /* input mux */ {"Input Mux", "Line In", "Line Input"}, {"Input Mux", "Mic", "Mic Bias"}, {"ADC", NULL, "Input Mux"}, /* inputs */ {"Line Input", NULL, "LLINEIN"}, {"Line Input", NULL, "RLINEIN"}, {"Mic Bias", NULL, "MICIN"}, }; static int wm8731_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets, ARRAY_SIZE(wm8731_dapm_widgets)); snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); snd_soc_dapm_new_widgets(codec); return 0; } struct _coeff_div { u32 mclk; u32 rate; u16 fs; u8 sr:4; u8 bosr:1; u8 usb:1; }; /* codec mclk clock divider coefficients */ static const struct _coeff_div coeff_div[] = { /* 48k */ {12288000, 48000, 256, 0x0, 0x0, 0x0}, {18432000, 48000, 384, 0x0, 0x1, 0x0}, {12000000, 48000, 250, 0x0, 0x0, 0x1}, /* 32k */ {12288000, 32000, 384, 0x6, 0x0, 0x0}, {18432000, 32000, 576, 0x6, 0x1, 0x0}, {12000000, 32000, 375, 0x6, 0x0, 0x1}, /* 8k */ {12288000, 8000, 1536, 0x3, 0x0, 0x0}, {18432000, 8000, 2304, 0x3, 0x1, 0x0}, {11289600, 8000, 1408, 0xb, 0x0, 0x0}, {16934400, 8000, 2112, 0xb, 0x1, 0x0}, {12000000, 8000, 1500, 0x3, 0x0, 0x1}, /* 96k */ {12288000, 96000, 128, 0x7, 0x0, 0x0}, {18432000, 96000, 192, 0x7, 0x1, 0x0}, {12000000, 96000, 125, 0x7, 0x0, 0x1}, /* 44.1k */ {11289600, 44100, 256, 0x8, 0x0, 0x0}, {16934400, 44100, 384, 0x8, 0x1, 0x0}, {12000000, 44100, 272, 0x8, 0x1, 0x1}, /* 88.2k */ {11289600, 88200, 128, 0xf, 0x0, 0x0}, {16934400, 88200, 192, 0xf, 0x1, 0x0}, {12000000, 88200, 136, 0xf, 0x1, 0x1}, }; static inline int get_coeff(int mclk, int rate) { int i; for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) return i; } return 0; } static int wm8731_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 wm8731_priv *wm8731 = codec->private_data; u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3; int i = get_coeff(wm8731->sysclk, params_rate(params)); u16 srate = (coeff_div[i].sr << 2) | (coeff_div[i].bosr << 1) | coeff_div[i].usb; wm8731_write(codec, WM8731_SRATE, srate); /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= 0x0004; break; case SNDRV_PCM_FORMAT_S24_LE: iface |= 0x0008; break; } wm8731_write(codec, WM8731_IFACE, iface); return 0; } static int wm8731_pcm_prepare(struct snd_pcm_substream *substream, 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; /* set active */ wm8731_write(codec, WM8731_ACTIVE, 0x0001); return 0; } static void wm8731_shutdown(struct snd_pcm_substream *substream, 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; /* deactivate */ if (!codec->active) { udelay(50); wm8731_write(codec, WM8731_ACTIVE, 0x0); } } static int wm8731_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7; if (mute) wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8); else wm8731_write(codec, WM8731_APDIGI, mute_reg); return 0; } static int wm8731_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 wm8731_priv *wm8731 = codec->private_data; switch (freq) { case 11289600: case 12000000: case 12288000: case 16934400: case 18432000: wm8731->sysclk = freq; return 0; } return -EINVAL; } static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = 0; /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: iface |= 0x0040; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= 0x0002; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0001; break; case SND_SOC_DAIFMT_DSP_A: iface |= 0x0003; break; case SND_SOC_DAIFMT_DSP_B: iface |= 0x0013; break; default: return -EINVAL; } /* clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x0090; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x0080; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x0010; break; default: return -EINVAL; } /* set iface */ wm8731_write(codec, WM8731_IFACE, iface); return 0; } static int wm8731_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 reg; switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: /* Clear PWROFF, gate CLKOUT, everything else as-is */ reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f; wm8731_write(codec, WM8731_PWR, reg | 0x0040); break; case SND_SOC_BIAS_OFF: wm8731_write(codec, WM8731_ACTIVE, 0x0); wm8731_write(codec, WM8731_PWR, 0xffff); break; } codec->bias_level = level; return 0; } #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ SNDRV_PCM_RATE_96000) #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) struct snd_soc_dai wm8731_dai = { .name = "WM8731", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, .rates = WM8731_RATES, .formats = WM8731_FORMATS,}, .capture = { .stream_name = "Capture", .channels_min = 1, .channels_max = 2, .rates = WM8731_RATES, .formats = WM8731_FORMATS,}, .ops = { .prepare = wm8731_pcm_prepare, .hw_params = wm8731_hw_params, .shutdown = wm8731_shutdown, .digital_mute = wm8731_mute, .set_sysclk = wm8731_set_dai_sysclk, .set_fmt = wm8731_set_dai_fmt, } }; EXPORT_SYMBOL_GPL(wm8731_dai); static int wm8731_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; wm8731_write(codec, WM8731_ACTIVE, 0x0); wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8731_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; int i; u8 data[2]; u16 *cache = codec->reg_cache; /* Sync reg_cache with the hardware */ for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) { data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); data[1] = cache[i] & 0x00ff; codec->hw_write(codec->control_data, data, 2); } wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8731_set_bias_level(codec, codec->suspend_bias_level); return 0; } /* * initialise the WM8731 driver * register the mixer and dsp interfaces with the kernel */ static int wm8731_init(struct snd_soc_device *socdev) { struct snd_soc_codec *codec = socdev->card->codec; int reg, ret = 0; codec->name = "WM8731"; codec->owner = THIS_MODULE; codec->read = wm8731_read_reg_cache; codec->write = wm8731_write; codec->set_bias_level = wm8731_set_bias_level; codec->dai = &wm8731_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8731_reg); codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL); if (codec->reg_cache == NULL) return -ENOMEM; wm8731_reset(codec); /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { printk(KERN_ERR "wm8731: failed to create pcms\n"); goto pcm_err; } /* power on device */ wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY); /* set the update bits */ reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V); wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100); reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V); wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100); reg = wm8731_read_reg_cache(codec, WM8731_LINVOL); wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100); reg = wm8731_read_reg_cache(codec, WM8731_RINVOL); wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100); snd_soc_add_controls(codec, wm8731_snd_controls, ARRAY_SIZE(wm8731_snd_controls)); wm8731_add_widgets(codec); ret = snd_soc_init_card(socdev); if (ret < 0) { printk(KERN_ERR "wm8731: 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 *wm8731_socdev; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) /* * WM8731 2 wire address is determined by GPIO5 * state during powerup. * low = 0x1a * high = 0x1b */ static int wm8731_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct snd_soc_device *socdev = wm8731_socdev; struct snd_soc_codec *codec = socdev->card->codec; int ret; i2c_set_clientdata(i2c, codec); codec->control_data = i2c; ret = wm8731_init(socdev); if (ret < 0) pr_err("failed to initialise WM8731\n"); return ret; } static int wm8731_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 wm8731_i2c_id[] = { { "wm8731", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id); static struct i2c_driver wm8731_i2c_driver = { .driver = { .name = "WM8731 I2C Codec", .owner = THIS_MODULE, }, .probe = wm8731_i2c_probe, .remove = wm8731_i2c_remove, .id_table = wm8731_i2c_id, }; static int wm8731_add_i2c_device(struct platform_device *pdev, const struct wm8731_setup_data *setup) { struct i2c_board_info info; struct i2c_adapter *adapter; struct i2c_client *client; int ret; ret = i2c_add_driver(&wm8731_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, "wm8731", 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(&wm8731_i2c_driver); return -ENODEV; } #endif #if defined(CONFIG_SPI_MASTER) static int __devinit wm8731_spi_probe(struct spi_device *spi) { struct snd_soc_device *socdev = wm8731_socdev; struct snd_soc_codec *codec = socdev->card->codec; int ret; codec->control_data = spi; ret = wm8731_init(socdev); if (ret < 0) dev_err(&spi->dev, "failed to initialise WM8731\n"); return ret; } static int __devexit wm8731_spi_remove(struct spi_device *spi) { return 0; } static struct spi_driver wm8731_spi_driver = { .driver = { .name = "wm8731", .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = wm8731_spi_probe, .remove = __devexit_p(wm8731_spi_remove), }; static int wm8731_spi_write(struct spi_device *spi, const char *data, int len) { struct spi_transfer t; struct spi_message m; u8 msg[2]; if (len <= 0) return 0; msg[0] = data[0]; msg[1] = data[1]; spi_message_init(&m); memset(&t, 0, (sizeof t)); t.tx_buf = &msg[0]; t.len = len; spi_message_add_tail(&t, &m); spi_sync(spi, &m); return len; } #endif /* CONFIG_SPI_MASTER */ static int wm8731_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct wm8731_setup_data *setup; struct snd_soc_codec *codec; struct wm8731_priv *wm8731; int ret = 0; setup = socdev->codec_data; codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); if (codec == NULL) return -ENOMEM; wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL); if (wm8731 == NULL) { kfree(codec); return -ENOMEM; } codec->private_data = wm8731; socdev->card->codec = codec; mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); wm8731_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; ret = wm8731_add_i2c_device(pdev, setup); } #endif #if defined(CONFIG_SPI_MASTER) if (setup->spi) { codec->hw_write = (hw_write_t)wm8731_spi_write; ret = spi_register_driver(&wm8731_spi_driver); if (ret != 0) printk(KERN_ERR "can't add spi driver"); } #endif if (ret != 0) { kfree(codec->private_data); kfree(codec); } return ret; } /* power down chip */ static int wm8731_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) wm8731_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) i2c_unregister_device(codec->control_data); i2c_del_driver(&wm8731_i2c_driver); #endif #if defined(CONFIG_SPI_MASTER) spi_unregister_driver(&wm8731_spi_driver); #endif kfree(codec->private_data); kfree(codec); return 0; } struct snd_soc_codec_device soc_codec_dev_wm8731 = { .probe = wm8731_probe, .remove = wm8731_remove, .suspend = wm8731_suspend, .resume = wm8731_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731); static int __init wm8731_modinit(void) { return snd_soc_register_dai(&wm8731_dai); } module_init(wm8731_modinit); static void __exit wm8731_exit(void) { snd_soc_unregister_dai(&wm8731_dai); } module_exit(wm8731_exit); MODULE_DESCRIPTION("ASoC WM8731 driver"); MODULE_AUTHOR("Richard Purdie"); MODULE_LICENSE("GPL");