Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * ALSA SoC driver for |
| 3 | * Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC |
| 4 | * |
| 5 | * (c) 2013 Daniel Mack <zonque@gmail.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/of.h> |
| 15 | #include <linux/of_gpio.h> |
| 16 | #include <linux/of_device.h> |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 17 | #include <linux/regulator/consumer.h> |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 18 | #include <sound/soc.h> |
| 19 | #include <sound/pcm.h> |
| 20 | #include <sound/initval.h> |
| 21 | |
Daniel Mack | 2ad7654 | 2014-03-28 19:05:04 +0100 | [diff] [blame] | 22 | static const char * const supply_names[] = { |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 23 | "va", "vd" |
| 24 | }; |
| 25 | |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 26 | struct ak5386_priv { |
| 27 | int reset_gpio; |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 28 | struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 29 | }; |
| 30 | |
Mark Brown | dcf1439 | 2013-08-11 12:28:56 +0100 | [diff] [blame] | 31 | static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = { |
| 32 | SND_SOC_DAPM_INPUT("AINL"), |
| 33 | SND_SOC_DAPM_INPUT("AINR"), |
| 34 | }; |
| 35 | |
| 36 | static const struct snd_soc_dapm_route ak5386_dapm_routes[] = { |
| 37 | { "Capture", NULL, "AINL" }, |
| 38 | { "Capture", NULL, "AINR" }, |
| 39 | }; |
| 40 | |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 41 | static int ak5386_soc_probe(struct snd_soc_codec *codec) |
| 42 | { |
| 43 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 44 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
| 45 | } |
| 46 | |
| 47 | static int ak5386_soc_remove(struct snd_soc_codec *codec) |
| 48 | { |
| 49 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 50 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | #ifdef CONFIG_PM |
| 55 | static int ak5386_soc_suspend(struct snd_soc_codec *codec) |
| 56 | { |
| 57 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 58 | regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | static int ak5386_soc_resume(struct snd_soc_codec *codec) |
| 63 | { |
| 64 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 65 | return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
| 66 | } |
| 67 | #else |
| 68 | #define ak5386_soc_suspend NULL |
| 69 | #define ak5386_soc_resume NULL |
| 70 | #endif /* CONFIG_PM */ |
| 71 | |
Bhumika Goyal | a180ba4 | 2017-08-03 21:30:19 +0530 | [diff] [blame] | 72 | static const struct snd_soc_codec_driver soc_codec_ak5386 = { |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 73 | .probe = ak5386_soc_probe, |
| 74 | .remove = ak5386_soc_remove, |
| 75 | .suspend = ak5386_soc_suspend, |
| 76 | .resume = ak5386_soc_resume, |
Kuninori Morimoto | 5bc4f73 | 2016-08-08 09:05:56 +0000 | [diff] [blame] | 77 | .component_driver = { |
| 78 | .dapm_widgets = ak5386_dapm_widgets, |
| 79 | .num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets), |
| 80 | .dapm_routes = ak5386_dapm_routes, |
| 81 | .num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes), |
| 82 | }, |
Mark Brown | dcf1439 | 2013-08-11 12:28:56 +0100 | [diff] [blame] | 83 | }; |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 84 | |
| 85 | static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai, |
| 86 | unsigned int format) |
| 87 | { |
| 88 | struct snd_soc_codec *codec = codec_dai->codec; |
| 89 | |
| 90 | format &= SND_SOC_DAIFMT_FORMAT_MASK; |
| 91 | if (format != SND_SOC_DAIFMT_LEFT_J && |
| 92 | format != SND_SOC_DAIFMT_I2S) { |
| 93 | dev_err(codec->dev, "Invalid DAI format\n"); |
| 94 | return -EINVAL; |
| 95 | } |
| 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | static int ak5386_hw_params(struct snd_pcm_substream *substream, |
| 101 | struct snd_pcm_hw_params *params, |
| 102 | struct snd_soc_dai *dai) |
| 103 | { |
| 104 | struct snd_soc_codec *codec = dai->codec; |
| 105 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 106 | |
| 107 | /* |
| 108 | * From the datasheet: |
| 109 | * |
| 110 | * All external clocks (MCLK, SCLK and LRCK) must be present unless |
| 111 | * PDN pin = āLā. If these clocks are not provided, the AK5386 may |
| 112 | * draw excess current due to its use of internal dynamically |
| 113 | * refreshed logic. If the external clocks are not present, place |
| 114 | * the AK5386 in power-down mode (PDN pin = āLā). |
| 115 | */ |
| 116 | |
| 117 | if (gpio_is_valid(priv->reset_gpio)) |
| 118 | gpio_set_value(priv->reset_gpio, 1); |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static int ak5386_hw_free(struct snd_pcm_substream *substream, |
| 124 | struct snd_soc_dai *dai) |
| 125 | { |
| 126 | struct snd_soc_codec *codec = dai->codec; |
| 127 | struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec); |
| 128 | |
| 129 | if (gpio_is_valid(priv->reset_gpio)) |
| 130 | gpio_set_value(priv->reset_gpio, 0); |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | static const struct snd_soc_dai_ops ak5386_dai_ops = { |
| 136 | .set_fmt = ak5386_set_dai_fmt, |
| 137 | .hw_params = ak5386_hw_params, |
| 138 | .hw_free = ak5386_hw_free, |
| 139 | }; |
| 140 | |
| 141 | static struct snd_soc_dai_driver ak5386_dai = { |
| 142 | .name = "ak5386-hifi", |
| 143 | .capture = { |
| 144 | .stream_name = "Capture", |
| 145 | .channels_min = 1, |
| 146 | .channels_max = 2, |
| 147 | .rates = SNDRV_PCM_RATE_8000_192000, |
| 148 | .formats = SNDRV_PCM_FMTBIT_S8 | |
| 149 | SNDRV_PCM_FMTBIT_S16_LE | |
| 150 | SNDRV_PCM_FMTBIT_S24_LE | |
| 151 | SNDRV_PCM_FMTBIT_S24_3LE, |
| 152 | }, |
| 153 | .ops = &ak5386_dai_ops, |
| 154 | }; |
| 155 | |
| 156 | #ifdef CONFIG_OF |
| 157 | static const struct of_device_id ak5386_dt_ids[] = { |
| 158 | { .compatible = "asahi-kasei,ak5386", }, |
| 159 | { } |
| 160 | }; |
| 161 | MODULE_DEVICE_TABLE(of, ak5386_dt_ids); |
| 162 | #endif |
| 163 | |
| 164 | static int ak5386_probe(struct platform_device *pdev) |
| 165 | { |
| 166 | struct device *dev = &pdev->dev; |
| 167 | struct ak5386_priv *priv; |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 168 | int ret, i; |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 169 | |
| 170 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| 171 | if (!priv) |
| 172 | return -ENOMEM; |
| 173 | |
| 174 | priv->reset_gpio = -EINVAL; |
| 175 | dev_set_drvdata(dev, priv); |
| 176 | |
Daniel Mack | fb668e7 | 2014-03-27 21:42:14 +0100 | [diff] [blame] | 177 | for (i = 0; i < ARRAY_SIZE(supply_names); i++) |
| 178 | priv->supplies[i].supply = supply_names[i]; |
| 179 | |
| 180 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), |
| 181 | priv->supplies); |
| 182 | if (ret < 0) |
| 183 | return ret; |
| 184 | |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 185 | if (of_match_device(of_match_ptr(ak5386_dt_ids), dev)) |
| 186 | priv->reset_gpio = of_get_named_gpio(dev->of_node, |
| 187 | "reset-gpio", 0); |
| 188 | |
| 189 | if (gpio_is_valid(priv->reset_gpio)) |
| 190 | if (devm_gpio_request_one(dev, priv->reset_gpio, |
| 191 | GPIOF_OUT_INIT_LOW, |
| 192 | "AK5386 Reset")) |
| 193 | priv->reset_gpio = -EINVAL; |
| 194 | |
| 195 | return snd_soc_register_codec(dev, &soc_codec_ak5386, |
| 196 | &ak5386_dai, 1); |
| 197 | } |
| 198 | |
| 199 | static int ak5386_remove(struct platform_device *pdev) |
| 200 | { |
| 201 | snd_soc_unregister_codec(&pdev->dev); |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static struct platform_driver ak5386_driver = { |
| 206 | .probe = ak5386_probe, |
| 207 | .remove = ak5386_remove, |
| 208 | .driver = { |
| 209 | .name = "ak5386", |
Daniel Mack | cc289be | 2013-03-08 12:07:28 +0100 | [diff] [blame] | 210 | .of_match_table = of_match_ptr(ak5386_dt_ids), |
| 211 | }, |
| 212 | }; |
| 213 | |
| 214 | module_platform_driver(ak5386_driver); |
| 215 | |
| 216 | MODULE_DESCRIPTION("ASoC driver for AK5386 ADC"); |
| 217 | MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>"); |
| 218 | MODULE_LICENSE("GPL"); |