1 /* 2 * PCM179X ASoC codec driver 3 * 4 * Copyright (c) Amarula Solutions B.V. 2013 5 * 6 * Michael Trimarchi <michael@amarulasolutions.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 2 11 * of the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/slab.h> 21 #include <linux/kernel.h> 22 #include <linux/device.h> 23 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/initval.h> 28 #include <sound/soc.h> 29 #include <sound/tlv.h> 30 #include <linux/of.h> 31 32 #include "pcm179x.h" 33 34 #define PCM179X_DAC_VOL_LEFT 0x10 35 #define PCM179X_DAC_VOL_RIGHT 0x11 36 #define PCM179X_FMT_CONTROL 0x12 37 #define PCM179X_MODE_CONTROL 0x13 38 #define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL 39 40 #define PCM179X_FMT_MASK 0x70 41 #define PCM179X_FMT_SHIFT 4 42 #define PCM179X_MUTE_MASK 0x01 43 #define PCM179X_MUTE_SHIFT 0 44 #define PCM179X_ATLD_ENABLE (1 << 7) 45 46 static const struct reg_default pcm179x_reg_defaults[] = { 47 { 0x10, 0xff }, 48 { 0x11, 0xff }, 49 { 0x12, 0x50 }, 50 { 0x13, 0x00 }, 51 { 0x14, 0x00 }, 52 { 0x15, 0x01 }, 53 { 0x16, 0x00 }, 54 { 0x17, 0x00 }, 55 }; 56 57 static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg) 58 { 59 return reg >= 0x10 && reg <= 0x17; 60 } 61 62 static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg) 63 { 64 bool accessible; 65 66 accessible = pcm179x_accessible_reg(dev, reg); 67 68 return accessible && reg != 0x16 && reg != 0x17; 69 } 70 71 struct pcm179x_private { 72 struct regmap *regmap; 73 unsigned int format; 74 unsigned int rate; 75 }; 76 77 static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai, 78 unsigned int format) 79 { 80 struct snd_soc_codec *codec = codec_dai->codec; 81 struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 82 83 priv->format = format; 84 85 return 0; 86 } 87 88 static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute) 89 { 90 struct snd_soc_codec *codec = dai->codec; 91 struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 92 int ret; 93 94 ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE, 95 PCM179X_MUTE_MASK, !!mute); 96 if (ret < 0) 97 return ret; 98 99 return 0; 100 } 101 102 static int pcm179x_hw_params(struct snd_pcm_substream *substream, 103 struct snd_pcm_hw_params *params, 104 struct snd_soc_dai *dai) 105 { 106 struct snd_soc_codec *codec = dai->codec; 107 struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 108 int val = 0, ret; 109 110 priv->rate = params_rate(params); 111 112 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { 113 case SND_SOC_DAIFMT_RIGHT_J: 114 switch (params_width(params)) { 115 case 24: 116 case 32: 117 val = 2; 118 break; 119 case 16: 120 val = 0; 121 break; 122 default: 123 return -EINVAL; 124 } 125 break; 126 case SND_SOC_DAIFMT_I2S: 127 switch (params_width(params)) { 128 case 24: 129 case 32: 130 val = 5; 131 break; 132 case 16: 133 val = 4; 134 break; 135 default: 136 return -EINVAL; 137 } 138 break; 139 default: 140 dev_err(codec->dev, "Invalid DAI format\n"); 141 return -EINVAL; 142 } 143 144 val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE; 145 146 ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL, 147 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val); 148 if (ret < 0) 149 return ret; 150 151 return 0; 152 } 153 154 static const struct snd_soc_dai_ops pcm179x_dai_ops = { 155 .set_fmt = pcm179x_set_dai_fmt, 156 .hw_params = pcm179x_hw_params, 157 .digital_mute = pcm179x_digital_mute, 158 }; 159 160 static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1); 161 162 static const struct snd_kcontrol_new pcm179x_controls[] = { 163 SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT, 164 PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, 165 pcm179x_dac_tlv), 166 SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0), 167 SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0), 168 }; 169 170 static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = { 171 SND_SOC_DAPM_OUTPUT("IOUTL+"), 172 SND_SOC_DAPM_OUTPUT("IOUTL-"), 173 SND_SOC_DAPM_OUTPUT("IOUTR+"), 174 SND_SOC_DAPM_OUTPUT("IOUTR-"), 175 }; 176 177 static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = { 178 { "IOUTL+", NULL, "Playback" }, 179 { "IOUTL-", NULL, "Playback" }, 180 { "IOUTR+", NULL, "Playback" }, 181 { "IOUTR-", NULL, "Playback" }, 182 }; 183 184 static struct snd_soc_dai_driver pcm179x_dai = { 185 .name = "pcm179x-hifi", 186 .playback = { 187 .stream_name = "Playback", 188 .channels_min = 2, 189 .channels_max = 2, 190 .rates = SNDRV_PCM_RATE_CONTINUOUS, 191 .rate_min = 10000, 192 .rate_max = 200000, 193 .formats = PCM1792A_FORMATS, }, 194 .ops = &pcm179x_dai_ops, 195 }; 196 197 const struct regmap_config pcm179x_regmap_config = { 198 .reg_bits = 8, 199 .val_bits = 8, 200 .max_register = 23, 201 .reg_defaults = pcm179x_reg_defaults, 202 .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults), 203 .writeable_reg = pcm179x_writeable_reg, 204 .readable_reg = pcm179x_accessible_reg, 205 }; 206 EXPORT_SYMBOL_GPL(pcm179x_regmap_config); 207 208 static struct snd_soc_codec_driver soc_codec_dev_pcm179x = { 209 .component_driver = { 210 .controls = pcm179x_controls, 211 .num_controls = ARRAY_SIZE(pcm179x_controls), 212 .dapm_widgets = pcm179x_dapm_widgets, 213 .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets), 214 .dapm_routes = pcm179x_dapm_routes, 215 .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes), 216 }, 217 }; 218 219 int pcm179x_common_init(struct device *dev, struct regmap *regmap) 220 { 221 struct pcm179x_private *pcm179x; 222 223 pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private), 224 GFP_KERNEL); 225 if (!pcm179x) 226 return -ENOMEM; 227 228 pcm179x->regmap = regmap; 229 dev_set_drvdata(dev, pcm179x); 230 231 return snd_soc_register_codec(dev, 232 &soc_codec_dev_pcm179x, &pcm179x_dai, 1); 233 } 234 EXPORT_SYMBOL_GPL(pcm179x_common_init); 235 236 int pcm179x_common_exit(struct device *dev) 237 { 238 snd_soc_unregister_codec(dev); 239 return 0; 240 } 241 EXPORT_SYMBOL_GPL(pcm179x_common_exit); 242 243 MODULE_DESCRIPTION("ASoC PCM179X driver"); 244 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>"); 245 MODULE_LICENSE("GPL"); 246