Mylène Josserand | 4ae340d | 2018-03-15 17:18:24 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Audio driver for PCM1789 |
| 3 | // Copyright (C) 2018 Bootlin |
| 4 | // Mylène Josserand <mylene.josserand@bootlin.com> |
| 5 | |
Arnd Bergmann | 3217004 | 2018-05-30 23:53:45 +0200 | [diff] [blame] | 6 | #include <linux/gpio/consumer.h> |
Mylène Josserand | 4ae340d | 2018-03-15 17:18:24 +0100 | [diff] [blame] | 7 | #include <linux/module.h> |
| 8 | #include <linux/workqueue.h> |
| 9 | |
| 10 | #include <sound/pcm_params.h> |
| 11 | #include <sound/soc.h> |
| 12 | #include <sound/tlv.h> |
| 13 | |
| 14 | #include "pcm1789.h" |
| 15 | |
| 16 | #define PCM1789_MUTE_CONTROL 0x10 |
| 17 | #define PCM1789_FMT_CONTROL 0x11 |
| 18 | #define PCM1789_SOFT_MUTE 0x14 |
| 19 | #define PCM1789_DAC_VOL_LEFT 0x18 |
| 20 | #define PCM1789_DAC_VOL_RIGHT 0x19 |
| 21 | |
| 22 | #define PCM1789_FMT_MASK 0x07 |
| 23 | #define PCM1789_MUTE_MASK 0x03 |
| 24 | #define PCM1789_MUTE_SRET 0x06 |
| 25 | |
| 26 | struct pcm1789_private { |
| 27 | struct regmap *regmap; |
| 28 | unsigned int format; |
| 29 | unsigned int rate; |
| 30 | struct gpio_desc *reset; |
| 31 | struct work_struct work; |
| 32 | struct device *dev; |
| 33 | }; |
| 34 | |
| 35 | static const struct reg_default pcm1789_reg_defaults[] = { |
| 36 | { PCM1789_FMT_CONTROL, 0x00 }, |
| 37 | { PCM1789_SOFT_MUTE, 0x00 }, |
| 38 | { PCM1789_DAC_VOL_LEFT, 0xff }, |
| 39 | { PCM1789_DAC_VOL_RIGHT, 0xff }, |
| 40 | }; |
| 41 | |
| 42 | static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg) |
| 43 | { |
| 44 | return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT; |
| 45 | } |
| 46 | |
| 47 | static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg) |
| 48 | { |
| 49 | return pcm1789_accessible_reg(dev, reg); |
| 50 | } |
| 51 | |
| 52 | static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai, |
| 53 | unsigned int format) |
| 54 | { |
| 55 | struct snd_soc_component *component = codec_dai->component; |
| 56 | struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
| 57 | |
| 58 | priv->format = format; |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute) |
| 64 | { |
| 65 | struct snd_soc_component *component = codec_dai->component; |
| 66 | struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
| 67 | |
| 68 | return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE, |
| 69 | PCM1789_MUTE_MASK, |
| 70 | mute ? 0 : PCM1789_MUTE_MASK); |
| 71 | } |
| 72 | |
| 73 | static int pcm1789_hw_params(struct snd_pcm_substream *substream, |
| 74 | struct snd_pcm_hw_params *params, |
| 75 | struct snd_soc_dai *codec_dai) |
| 76 | { |
| 77 | struct snd_soc_component *component = codec_dai->component; |
| 78 | struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
| 79 | int val = 0, ret; |
| 80 | |
| 81 | priv->rate = params_rate(params); |
| 82 | |
| 83 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 84 | case SND_SOC_DAIFMT_RIGHT_J: |
| 85 | switch (params_width(params)) { |
| 86 | case 24: |
| 87 | val = 2; |
| 88 | break; |
| 89 | case 16: |
| 90 | val = 3; |
| 91 | break; |
| 92 | default: |
| 93 | return -EINVAL; |
| 94 | } |
| 95 | break; |
| 96 | case SND_SOC_DAIFMT_I2S: |
| 97 | switch (params_width(params)) { |
| 98 | case 16: |
| 99 | case 24: |
| 100 | case 32: |
| 101 | val = 0; |
| 102 | break; |
| 103 | default: |
| 104 | return -EINVAL; |
| 105 | } |
| 106 | break; |
| 107 | case SND_SOC_DAIFMT_LEFT_J: |
| 108 | switch (params_width(params)) { |
| 109 | case 16: |
| 110 | case 24: |
| 111 | case 32: |
| 112 | val = 1; |
| 113 | break; |
| 114 | default: |
| 115 | return -EINVAL; |
| 116 | } |
| 117 | break; |
| 118 | default: |
| 119 | dev_err(component->dev, "Invalid DAI format\n"); |
| 120 | return -EINVAL; |
| 121 | } |
| 122 | |
| 123 | ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL, |
| 124 | PCM1789_FMT_MASK, val); |
| 125 | if (ret < 0) |
| 126 | return ret; |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static void pcm1789_work_queue(struct work_struct *work) |
| 132 | { |
| 133 | struct pcm1789_private *priv = container_of(work, |
| 134 | struct pcm1789_private, |
| 135 | work); |
| 136 | |
| 137 | /* Perform a software reset to remove codec from desynchronized state */ |
| 138 | if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL, |
| 139 | 0x3 << PCM1789_MUTE_SRET, 0) < 0) |
| 140 | dev_err(priv->dev, "Error while setting SRET"); |
| 141 | } |
| 142 | |
| 143 | static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd, |
| 144 | struct snd_soc_dai *dai) |
| 145 | { |
| 146 | struct snd_soc_component *component = dai->component; |
| 147 | struct pcm1789_private *priv = snd_soc_component_get_drvdata(component); |
| 148 | int ret = 0; |
| 149 | |
| 150 | switch (cmd) { |
| 151 | case SNDRV_PCM_TRIGGER_START: |
| 152 | case SNDRV_PCM_TRIGGER_RESUME: |
| 153 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 154 | schedule_work(&priv->work); |
| 155 | break; |
| 156 | case SNDRV_PCM_TRIGGER_STOP: |
| 157 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 158 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 159 | break; |
| 160 | default: |
| 161 | ret = -EINVAL; |
| 162 | } |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | static const struct snd_soc_dai_ops pcm1789_dai_ops = { |
| 168 | .set_fmt = pcm1789_set_dai_fmt, |
| 169 | .hw_params = pcm1789_hw_params, |
| 170 | .digital_mute = pcm1789_digital_mute, |
| 171 | .trigger = pcm1789_trigger, |
| 172 | }; |
| 173 | |
| 174 | static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1); |
| 175 | |
| 176 | static const struct snd_kcontrol_new pcm1789_controls[] = { |
| 177 | SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT, |
| 178 | PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, |
| 179 | pcm1789_dac_tlv), |
| 180 | }; |
| 181 | |
| 182 | static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = { |
| 183 | SND_SOC_DAPM_OUTPUT("IOUTL+"), |
| 184 | SND_SOC_DAPM_OUTPUT("IOUTL-"), |
| 185 | SND_SOC_DAPM_OUTPUT("IOUTR+"), |
| 186 | SND_SOC_DAPM_OUTPUT("IOUTR-"), |
| 187 | }; |
| 188 | |
| 189 | static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = { |
| 190 | { "IOUTL+", NULL, "Playback" }, |
| 191 | { "IOUTL-", NULL, "Playback" }, |
| 192 | { "IOUTR+", NULL, "Playback" }, |
| 193 | { "IOUTR-", NULL, "Playback" }, |
| 194 | }; |
| 195 | |
| 196 | static struct snd_soc_dai_driver pcm1789_dai = { |
| 197 | .name = "pcm1789-hifi", |
| 198 | .playback = { |
| 199 | .stream_name = "Playback", |
| 200 | .channels_min = 2, |
| 201 | .channels_max = 2, |
| 202 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
| 203 | .rate_min = 10000, |
| 204 | .rate_max = 200000, |
| 205 | .formats = PCM1789_FORMATS, |
| 206 | }, |
| 207 | .ops = &pcm1789_dai_ops, |
| 208 | }; |
| 209 | |
| 210 | const struct regmap_config pcm1789_regmap_config = { |
| 211 | .reg_bits = 8, |
| 212 | .val_bits = 8, |
| 213 | .max_register = PCM1789_DAC_VOL_RIGHT, |
| 214 | .reg_defaults = pcm1789_reg_defaults, |
| 215 | .num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults), |
| 216 | .writeable_reg = pcm1789_writeable_reg, |
| 217 | .readable_reg = pcm1789_accessible_reg, |
| 218 | }; |
| 219 | EXPORT_SYMBOL_GPL(pcm1789_regmap_config); |
| 220 | |
| 221 | static const struct snd_soc_component_driver soc_component_dev_pcm1789 = { |
| 222 | .controls = pcm1789_controls, |
| 223 | .num_controls = ARRAY_SIZE(pcm1789_controls), |
| 224 | .dapm_widgets = pcm1789_dapm_widgets, |
| 225 | .num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets), |
| 226 | .dapm_routes = pcm1789_dapm_routes, |
| 227 | .num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes), |
| 228 | .idle_bias_on = 1, |
| 229 | .use_pmdown_time = 1, |
| 230 | .endianness = 1, |
| 231 | .non_legacy_dai_naming = 1, |
| 232 | }; |
| 233 | |
| 234 | int pcm1789_common_init(struct device *dev, struct regmap *regmap) |
| 235 | { |
| 236 | struct pcm1789_private *pcm1789; |
| 237 | |
| 238 | pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private), |
| 239 | GFP_KERNEL); |
| 240 | if (!pcm1789) |
| 241 | return -ENOMEM; |
| 242 | |
| 243 | pcm1789->regmap = regmap; |
| 244 | pcm1789->dev = dev; |
| 245 | dev_set_drvdata(dev, pcm1789); |
| 246 | |
| 247 | pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); |
| 248 | if (IS_ERR(pcm1789->reset)) |
| 249 | return PTR_ERR(pcm1789->reset); |
| 250 | |
| 251 | gpiod_set_value_cansleep(pcm1789->reset, 0); |
| 252 | msleep(300); |
| 253 | |
| 254 | INIT_WORK(&pcm1789->work, pcm1789_work_queue); |
| 255 | |
| 256 | return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789, |
| 257 | &pcm1789_dai, 1); |
| 258 | } |
| 259 | EXPORT_SYMBOL_GPL(pcm1789_common_init); |
| 260 | |
| 261 | int pcm1789_common_exit(struct device *dev) |
| 262 | { |
| 263 | struct pcm1789_private *priv = dev_get_drvdata(dev); |
| 264 | |
Stefan Agner | a7dc662 | 2018-06-17 15:45:29 +0200 | [diff] [blame] | 265 | flush_work(&priv->work); |
Mylène Josserand | 4ae340d | 2018-03-15 17:18:24 +0100 | [diff] [blame] | 266 | |
| 267 | return 0; |
| 268 | } |
| 269 | EXPORT_SYMBOL_GPL(pcm1789_common_exit); |
| 270 | |
| 271 | MODULE_DESCRIPTION("ASoC PCM1789 driver"); |
| 272 | MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>"); |
| 273 | MODULE_LICENSE("GPL"); |