/* * File: sound/soc/codecs/ad1938.c * Author: Barry Song * * Created: June 04 2009 * Description: Driver for AD1938 sound chip * * Modified: * Copyright 2009 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ad1938.h" /* codec private data */ struct ad1938_priv { struct snd_soc_codec codec; u8 reg_cache[AD1938_NUM_REGS]; }; static struct snd_soc_codec *ad1938_codec; struct snd_soc_codec_device soc_codec_dev_ad1938; static int ad1938_register(struct ad1938_priv *ad1938); static void ad1938_unregister(struct ad1938_priv *ad1938); /* * AD1938 volume/mute/de-emphasis etc. controls */ static const char *ad1938_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"}; static const struct soc_enum ad1938_deemp_enum = SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp); static const struct snd_kcontrol_new ad1938_snd_controls[] = { /* DAC volume control */ SOC_DOUBLE_R("DAC1 Volume", AD1938_DAC_L1_VOL, AD1938_DAC_R1_VOL, 0, 0xFF, 1), SOC_DOUBLE_R("DAC2 Volume", AD1938_DAC_L2_VOL, AD1938_DAC_R2_VOL, 0, 0xFF, 1), SOC_DOUBLE_R("DAC3 Volume", AD1938_DAC_L3_VOL, AD1938_DAC_R3_VOL, 0, 0xFF, 1), SOC_DOUBLE_R("DAC4 Volume", AD1938_DAC_L4_VOL, AD1938_DAC_R4_VOL, 0, 0xFF, 1), /* ADC switch control */ SOC_DOUBLE("ADC1 Switch", AD1938_ADC_CTRL0, AD1938_ADCL1_MUTE, AD1938_ADCR1_MUTE, 1, 1), SOC_DOUBLE("ADC2 Switch", AD1938_ADC_CTRL0, AD1938_ADCL2_MUTE, AD1938_ADCR2_MUTE, 1, 1), /* DAC switch control */ SOC_DOUBLE("DAC1 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL1_MUTE, AD1938_DACR1_MUTE, 1, 1), SOC_DOUBLE("DAC2 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL2_MUTE, AD1938_DACR2_MUTE, 1, 1), SOC_DOUBLE("DAC3 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL3_MUTE, AD1938_DACR3_MUTE, 1, 1), SOC_DOUBLE("DAC4 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL4_MUTE, AD1938_DACR4_MUTE, 1, 1), /* ADC high-pass filter */ SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0, AD1938_ADC_HIGHPASS_FILTER, 1, 0), /* DAC de-emphasis */ SOC_ENUM("Playback Deemphasis", ad1938_deemp_enum), }; static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = { SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1), SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0), SND_SOC_DAPM_OUTPUT("DAC1OUT"), SND_SOC_DAPM_OUTPUT("DAC2OUT"), SND_SOC_DAPM_OUTPUT("DAC3OUT"), SND_SOC_DAPM_OUTPUT("DAC4OUT"), SND_SOC_DAPM_INPUT("ADC1IN"), SND_SOC_DAPM_INPUT("ADC2IN"), }; static const struct snd_soc_dapm_route audio_paths[] = { { "DAC", NULL, "ADC_PWR" }, { "ADC", NULL, "ADC_PWR" }, { "DAC1OUT", "DAC1 Switch", "DAC" }, { "DAC2OUT", "DAC2 Switch", "DAC" }, { "DAC3OUT", "DAC3 Switch", "DAC" }, { "DAC4OUT", "DAC4 Switch", "DAC" }, { "ADC", "ADC1 Switch", "ADC1IN" }, { "ADC", "ADC2 Switch", "ADC2IN" }, }; /* * DAI ops entries */ static int ad1938_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; int reg; reg = codec->read(codec, AD1938_DAC_CTRL2); reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg & (~AD1938_DAC_MASTER_MUTE); codec->write(codec, AD1938_DAC_CTRL2, reg); return 0; } static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd) { int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0); reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg | AD1938_PLL_POWERDOWN; codec->write(codec, AD1938_PLL_CLK_CTRL0, reg); return 0; } static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int mask, int slots, int width) { struct snd_soc_codec *codec = dai->codec; int dac_reg = codec->read(codec, AD1938_DAC_CTRL1); int adc_reg = codec->read(codec, AD1938_ADC_CTRL2); dac_reg &= ~AD1938_DAC_CHAN_MASK; adc_reg &= ~AD1938_ADC_CHAN_MASK; switch (slots) { case 2: dac_reg |= AD1938_DAC_2_CHANNELS << AD1938_DAC_CHAN_SHFT; adc_reg |= AD1938_ADC_2_CHANNELS << AD1938_ADC_CHAN_SHFT; break; case 4: dac_reg |= AD1938_DAC_4_CHANNELS << AD1938_DAC_CHAN_SHFT; adc_reg |= AD1938_ADC_4_CHANNELS << AD1938_ADC_CHAN_SHFT; break; case 8: dac_reg |= AD1938_DAC_8_CHANNELS << AD1938_DAC_CHAN_SHFT; adc_reg |= AD1938_ADC_8_CHANNELS << AD1938_ADC_CHAN_SHFT; break; case 16: dac_reg |= AD1938_DAC_16_CHANNELS << AD1938_DAC_CHAN_SHFT; adc_reg |= AD1938_ADC_16_CHANNELS << AD1938_ADC_CHAN_SHFT; break; default: return -EINVAL; } codec->write(codec, AD1938_DAC_CTRL1, dac_reg); codec->write(codec, AD1938_ADC_CTRL2, adc_reg); return 0; } static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; int adc_reg, dac_reg; adc_reg = codec->read(codec, AD1938_ADC_CTRL2); dac_reg = codec->read(codec, AD1938_DAC_CTRL1); /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: adc_reg &= ~AD1938_ADC_SERFMT_MASK; adc_reg |= AD1938_ADC_SERFMT_TDM; break; case SND_SOC_DAIFMT_DSP_A: adc_reg &= ~AD1938_ADC_SERFMT_MASK; adc_reg |= AD1938_ADC_SERFMT_AUX; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */ adc_reg &= ~AD1938_ADC_LEFT_HIGH; adc_reg &= ~AD1938_ADC_BCLK_INV; dac_reg &= ~AD1938_DAC_LEFT_HIGH; dac_reg &= ~AD1938_DAC_BCLK_INV; break; case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */ adc_reg |= AD1938_ADC_LEFT_HIGH; adc_reg &= ~AD1938_ADC_BCLK_INV; dac_reg |= AD1938_DAC_LEFT_HIGH; dac_reg &= ~AD1938_DAC_BCLK_INV; break; case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */ adc_reg &= ~AD1938_ADC_LEFT_HIGH; adc_reg |= AD1938_ADC_BCLK_INV; dac_reg &= ~AD1938_DAC_LEFT_HIGH; dac_reg |= AD1938_DAC_BCLK_INV; break; case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */ adc_reg |= AD1938_ADC_LEFT_HIGH; adc_reg |= AD1938_ADC_BCLK_INV; dac_reg |= AD1938_DAC_LEFT_HIGH; dac_reg |= AD1938_DAC_BCLK_INV; break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */ adc_reg |= AD1938_ADC_LCR_MASTER; adc_reg |= AD1938_ADC_BCLK_MASTER; dac_reg |= AD1938_DAC_LCR_MASTER; dac_reg |= AD1938_DAC_BCLK_MASTER; break; case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */ adc_reg |= AD1938_ADC_LCR_MASTER; adc_reg &= ~AD1938_ADC_BCLK_MASTER; dac_reg |= AD1938_DAC_LCR_MASTER; dac_reg &= ~AD1938_DAC_BCLK_MASTER; break; case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */ adc_reg &= ~AD1938_ADC_LCR_MASTER; adc_reg |= AD1938_ADC_BCLK_MASTER; dac_reg &= ~AD1938_DAC_LCR_MASTER; dac_reg |= AD1938_DAC_BCLK_MASTER; break; case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */ adc_reg &= ~AD1938_ADC_LCR_MASTER; adc_reg &= ~AD1938_ADC_BCLK_MASTER; dac_reg &= ~AD1938_DAC_LCR_MASTER; dac_reg &= ~AD1938_DAC_BCLK_MASTER; break; default: return -EINVAL; } codec->write(codec, AD1938_ADC_CTRL2, adc_reg); codec->write(codec, AD1938_DAC_CTRL1, dac_reg); return 0; } static int ad1938_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { int word_len = 0, reg = 0; struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: word_len = 3; break; case SNDRV_PCM_FORMAT_S20_3LE: word_len = 1; break; case SNDRV_PCM_FORMAT_S24_LE: case SNDRV_PCM_FORMAT_S32_LE: word_len = 0; break; } reg = codec->read(codec, AD1938_DAC_CTRL2); reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len; codec->write(codec, AD1938_DAC_CTRL2, reg); reg = codec->read(codec, AD1938_ADC_CTRL1); reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len; codec->write(codec, AD1938_ADC_CTRL1, reg); return 0; } static int ad1938_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { switch (level) { case SND_SOC_BIAS_ON: ad1938_pll_powerctrl(codec, 1); break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: case SND_SOC_BIAS_OFF: ad1938_pll_powerctrl(codec, 0); break; } codec->bias_level = level; return 0; } /* * interface to read/write ad1938 register */ #define AD1938_SPI_ADDR 0x4 #define AD1938_SPI_READ 0x1 #define AD1938_SPI_BUFLEN 3 /* * write to the ad1938 register space */ static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 *reg_cache = codec->reg_cache; int ret = 0; if (value != reg_cache[reg]) { uint8_t buf[AD1938_SPI_BUFLEN]; struct spi_transfer t = { .tx_buf = buf, .len = AD1938_SPI_BUFLEN, }; struct spi_message m; buf[0] = AD1938_SPI_ADDR << 1; buf[1] = reg; buf[2] = value; spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(codec->control_data, &m); if (ret == 0) reg_cache[reg] = value; } return ret; } /* * read from the ad1938 register space cache */ static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { u8 *reg_cache = codec->reg_cache; if (reg >= codec->reg_cache_size) return -EINVAL; return reg_cache[reg]; } /* * read from the ad1938 register space */ static unsigned int ad1938_read_reg(struct snd_soc_codec *codec, unsigned int reg) { char w_buf[AD1938_SPI_BUFLEN]; char r_buf[AD1938_SPI_BUFLEN]; int ret; struct spi_transfer t = { .tx_buf = w_buf, .rx_buf = r_buf, .len = AD1938_SPI_BUFLEN, }; struct spi_message m; w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ; w_buf[1] = reg; w_buf[2] = 0; spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(codec->control_data, &m); if (ret == 0) return r_buf[2]; else return -EIO; } static int ad1938_fill_cache(struct snd_soc_codec *codec) { int i; u8 *reg_cache = codec->reg_cache; struct spi_device *spi = codec->control_data; for (i = 0; i < codec->reg_cache_size; i++) { int ret = ad1938_read_reg(codec, i); if (ret == -EIO) { dev_err(&spi->dev, "AD1938 SPI read failure\n"); return ret; } reg_cache[i] = ret; } return 0; } static int __devinit ad1938_spi_probe(struct spi_device *spi) { struct snd_soc_codec *codec; struct ad1938_priv *ad1938; ad1938 = kzalloc(sizeof(struct ad1938_priv), GFP_KERNEL); if (ad1938 == NULL) return -ENOMEM; codec = &ad1938->codec; codec->control_data = spi; codec->dev = &spi->dev; dev_set_drvdata(&spi->dev, ad1938); return ad1938_register(ad1938); } static int __devexit ad1938_spi_remove(struct spi_device *spi) { struct ad1938_priv *ad1938 = dev_get_drvdata(&spi->dev); ad1938_unregister(ad1938); return 0; } static struct spi_driver ad1938_spi_driver = { .driver = { .name = "ad1938-spi", .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = ad1938_spi_probe, .remove = __devexit_p(ad1938_spi_remove), }; static struct snd_soc_dai_ops ad1938_dai_ops = { .hw_params = ad1938_hw_params, .digital_mute = ad1938_mute, .set_tdm_slot = ad1938_set_tdm_slot, .set_fmt = ad1938_set_dai_fmt, }; /* codec DAI instance */ struct snd_soc_dai ad1938_dai = { .name = "AD1938", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 8, .rates = SNDRV_PCM_RATE_48000, .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, }, .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 4, .rates = SNDRV_PCM_RATE_48000, .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, }, .ops = &ad1938_dai_ops, }; EXPORT_SYMBOL_GPL(ad1938_dai); static int ad1938_register(struct ad1938_priv *ad1938) { int ret; struct snd_soc_codec *codec = &ad1938->codec; if (ad1938_codec) { dev_err(codec->dev, "Another ad1938 is registered\n"); return -EINVAL; } mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); codec->private_data = ad1938; codec->reg_cache = ad1938->reg_cache; codec->reg_cache_size = AD1938_NUM_REGS; codec->name = "AD1938"; codec->owner = THIS_MODULE; codec->dai = &ad1938_dai; codec->num_dai = 1; codec->write = ad1938_write_reg; codec->read = ad1938_read_reg_cache; INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); ad1938_dai.dev = codec->dev; ad1938_codec = codec; /* default setting for ad1938 */ /* unmute dac channels */ codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0); /* de-emphasis: 48kHz, powedown dac */ codec->write(codec, AD1938_DAC_CTRL2, 0x1A); /* powerdown dac, dac in tdm mode */ codec->write(codec, AD1938_DAC_CTRL0, 0x41); /* high-pass filter enable */ codec->write(codec, AD1938_ADC_CTRL0, 0x3); /* sata delay=1, adc aux mode */ codec->write(codec, AD1938_ADC_CTRL1, 0x43); /* pll input: mclki/xi */ codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D); codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04); ad1938_fill_cache(codec); ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); return ret; } ret = snd_soc_register_dai(&ad1938_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } return 0; } static void ad1938_unregister(struct ad1938_priv *ad1938) { ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&ad1938_dai); snd_soc_unregister_codec(&ad1938->codec); kfree(ad1938); ad1938_codec = NULL; } static int ad1938_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (ad1938_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = ad1938_codec; codec = ad1938_codec; /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { dev_err(codec->dev, "failed to create pcms: %d\n", ret); goto pcm_err; } snd_soc_add_controls(codec, ad1938_snd_controls, ARRAY_SIZE(ad1938_snd_controls)); snd_soc_dapm_new_controls(codec, ad1938_dapm_widgets, ARRAY_SIZE(ad1938_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); snd_soc_dapm_new_widgets(codec); ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY); ret = snd_soc_init_card(socdev); if (ret < 0) { dev_err(codec->dev, "failed to register card: %d\n", ret); goto card_err; } return ret; card_err: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: return ret; } /* power down chip */ static int ad1938_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); return 0; } #ifdef CONFIG_PM static int ad1938_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; ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int ad1938_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; if (codec->suspend_bias_level == SND_SOC_BIAS_ON) ad1938_set_bias_level(codec, SND_SOC_BIAS_ON); return 0; } #else #define ad1938_suspend NULL #define ad1938_resume NULL #endif struct snd_soc_codec_device soc_codec_dev_ad1938 = { .probe = ad1938_probe, .remove = ad1938_remove, .suspend = ad1938_suspend, .resume = ad1938_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938); static int __init ad1938_init(void) { int ret; ret = spi_register_driver(&ad1938_spi_driver); if (ret != 0) { printk(KERN_ERR "Failed to register ad1938 SPI driver: %d\n", ret); } return ret; } module_init(ad1938_init); static void __exit ad1938_exit(void) { spi_unregister_driver(&ad1938_spi_driver); } module_exit(ad1938_exit); MODULE_DESCRIPTION("ASoC ad1938 driver"); MODULE_AUTHOR("Barry Song "); MODULE_LICENSE("GPL");