1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2017 BayLibre, SAS. 4 * Author: Jerome Brunet <jbrunet@baylibre.com> 5 */ 6 7 #include <linux/of_platform.h> 8 #include <linux/module.h> 9 #include <sound/soc.h> 10 11 /* 12 * The everest 7134 is a very simple DA converter with no register 13 */ 14 15 struct es7134_clock_mode { 16 unsigned int rate_min; 17 unsigned int rate_max; 18 unsigned int *mclk_fs; 19 unsigned int mclk_fs_num; 20 }; 21 22 struct es7134_chip { 23 struct snd_soc_dai_driver *dai_drv; 24 const struct es7134_clock_mode *modes; 25 unsigned int mode_num; 26 const struct snd_soc_dapm_widget *extra_widgets; 27 unsigned int extra_widget_num; 28 const struct snd_soc_dapm_route *extra_routes; 29 unsigned int extra_route_num; 30 }; 31 32 struct es7134_data { 33 unsigned int mclk; 34 const struct es7134_chip *chip; 35 }; 36 37 static int es7134_check_mclk(struct snd_soc_dai *dai, 38 struct es7134_data *priv, 39 unsigned int rate) 40 { 41 unsigned int mfs = priv->mclk / rate; 42 int i, j; 43 44 for (i = 0; i < priv->chip->mode_num; i++) { 45 const struct es7134_clock_mode *mode = &priv->chip->modes[i]; 46 47 if (rate < mode->rate_min || rate > mode->rate_max) 48 continue; 49 50 for (j = 0; j < mode->mclk_fs_num; j++) { 51 if (mode->mclk_fs[j] == mfs) 52 return 0; 53 } 54 55 dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n", 56 mfs, rate); 57 return -EINVAL; 58 } 59 60 /* should not happen */ 61 dev_err(dai->dev, "unsupported rate: %u\n", rate); 62 return -EINVAL; 63 } 64 65 static int es7134_hw_params(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params *params, 67 struct snd_soc_dai *dai) 68 { 69 struct es7134_data *priv = snd_soc_dai_get_drvdata(dai); 70 71 /* mclk has not been provided, assume it is OK */ 72 if (!priv->mclk) 73 return 0; 74 75 return es7134_check_mclk(dai, priv, params_rate(params)); 76 } 77 78 static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id, 79 unsigned int freq, int dir) 80 { 81 struct es7134_data *priv = snd_soc_dai_get_drvdata(dai); 82 83 if (dir == SND_SOC_CLOCK_IN && clk_id == 0) { 84 priv->mclk = freq; 85 return 0; 86 } 87 88 return -ENOTSUPP; 89 } 90 91 static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 92 { 93 fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK | 94 SND_SOC_DAIFMT_MASTER_MASK); 95 96 if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 97 SND_SOC_DAIFMT_CBC_CFC)) { 98 dev_err(codec_dai->dev, "Invalid DAI format\n"); 99 return -EINVAL; 100 } 101 102 return 0; 103 } 104 105 static int es7134_component_probe(struct snd_soc_component *c) 106 { 107 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(c); 108 struct es7134_data *priv = snd_soc_component_get_drvdata(c); 109 const struct es7134_chip *chip = priv->chip; 110 int ret; 111 112 if (chip->extra_widget_num) { 113 ret = snd_soc_dapm_new_controls(dapm, chip->extra_widgets, 114 chip->extra_widget_num); 115 if (ret) { 116 dev_err(c->dev, "failed to add extra widgets\n"); 117 return ret; 118 } 119 } 120 121 if (chip->extra_route_num) { 122 ret = snd_soc_dapm_add_routes(dapm, chip->extra_routes, 123 chip->extra_route_num); 124 if (ret) { 125 dev_err(c->dev, "failed to add extra routes\n"); 126 return ret; 127 } 128 } 129 130 return 0; 131 } 132 133 static const struct snd_soc_dai_ops es7134_dai_ops = { 134 .set_fmt = es7134_set_fmt, 135 .hw_params = es7134_hw_params, 136 .set_sysclk = es7134_set_sysclk, 137 }; 138 139 static struct snd_soc_dai_driver es7134_dai = { 140 .name = "es7134-hifi", 141 .playback = { 142 .stream_name = "Playback", 143 .channels_min = 2, 144 .channels_max = 2, 145 .rates = (SNDRV_PCM_RATE_8000_48000 | 146 SNDRV_PCM_RATE_88200 | 147 SNDRV_PCM_RATE_96000 | 148 SNDRV_PCM_RATE_176400 | 149 SNDRV_PCM_RATE_192000), 150 .formats = (SNDRV_PCM_FMTBIT_S16_LE | 151 SNDRV_PCM_FMTBIT_S18_3LE | 152 SNDRV_PCM_FMTBIT_S20_3LE | 153 SNDRV_PCM_FMTBIT_S24_3LE | 154 SNDRV_PCM_FMTBIT_S24_LE), 155 }, 156 .ops = &es7134_dai_ops, 157 }; 158 159 static const struct es7134_clock_mode es7134_modes[] = { 160 { 161 /* Single speed mode */ 162 .rate_min = 8000, 163 .rate_max = 50000, 164 .mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 }, 165 .mclk_fs_num = 5, 166 }, { 167 /* Double speed mode */ 168 .rate_min = 84000, 169 .rate_max = 100000, 170 .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 }, 171 .mclk_fs_num = 5, 172 }, { 173 /* Quad speed mode */ 174 .rate_min = 167000, 175 .rate_max = 192000, 176 .mclk_fs = (unsigned int[]) { 128, 192, 256 }, 177 .mclk_fs_num = 3, 178 }, 179 }; 180 181 /* Digital I/O are also supplied by VDD on the es7134 */ 182 static const struct snd_soc_dapm_route es7134_extra_routes[] = { 183 { "Playback", NULL, "VDD", } 184 }; 185 186 static const struct es7134_chip es7134_chip __maybe_unused = { 187 .dai_drv = &es7134_dai, 188 .modes = es7134_modes, 189 .mode_num = ARRAY_SIZE(es7134_modes), 190 .extra_routes = es7134_extra_routes, 191 .extra_route_num = ARRAY_SIZE(es7134_extra_routes), 192 }; 193 194 static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = { 195 SND_SOC_DAPM_OUTPUT("AOUTL"), 196 SND_SOC_DAPM_OUTPUT("AOUTR"), 197 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), 198 SND_SOC_DAPM_REGULATOR_SUPPLY("VDD", 0, 0), 199 }; 200 201 static const struct snd_soc_dapm_route es7134_dapm_routes[] = { 202 { "AOUTL", NULL, "DAC" }, 203 { "AOUTR", NULL, "DAC" }, 204 { "DAC", NULL, "VDD" }, 205 }; 206 207 static const struct snd_soc_component_driver es7134_component_driver = { 208 .probe = es7134_component_probe, 209 .dapm_widgets = es7134_dapm_widgets, 210 .num_dapm_widgets = ARRAY_SIZE(es7134_dapm_widgets), 211 .dapm_routes = es7134_dapm_routes, 212 .num_dapm_routes = ARRAY_SIZE(es7134_dapm_routes), 213 .idle_bias_on = 1, 214 .use_pmdown_time = 1, 215 .endianness = 1, 216 }; 217 218 static struct snd_soc_dai_driver es7154_dai = { 219 .name = "es7154-hifi", 220 .playback = { 221 .stream_name = "Playback", 222 .channels_min = 2, 223 .channels_max = 2, 224 .rates = (SNDRV_PCM_RATE_8000_48000 | 225 SNDRV_PCM_RATE_88200 | 226 SNDRV_PCM_RATE_96000), 227 .formats = (SNDRV_PCM_FMTBIT_S16_LE | 228 SNDRV_PCM_FMTBIT_S18_3LE | 229 SNDRV_PCM_FMTBIT_S20_3LE | 230 SNDRV_PCM_FMTBIT_S24_3LE | 231 SNDRV_PCM_FMTBIT_S24_LE), 232 }, 233 .ops = &es7134_dai_ops, 234 }; 235 236 static const struct es7134_clock_mode es7154_modes[] = { 237 { 238 /* Single speed mode */ 239 .rate_min = 8000, 240 .rate_max = 50000, 241 .mclk_fs = (unsigned int[]) { 32, 64, 128, 192, 256, 242 384, 512, 768, 1024 }, 243 .mclk_fs_num = 9, 244 }, { 245 /* Double speed mode */ 246 .rate_min = 84000, 247 .rate_max = 100000, 248 .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512, 249 768, 1024}, 250 .mclk_fs_num = 7, 251 } 252 }; 253 254 /* Es7154 has a separate supply for digital I/O */ 255 static const struct snd_soc_dapm_widget es7154_extra_widgets[] = { 256 SND_SOC_DAPM_REGULATOR_SUPPLY("PVDD", 0, 0), 257 }; 258 259 static const struct snd_soc_dapm_route es7154_extra_routes[] = { 260 { "Playback", NULL, "PVDD", } 261 }; 262 263 static const struct es7134_chip es7154_chip __maybe_unused = { 264 .dai_drv = &es7154_dai, 265 .modes = es7154_modes, 266 .mode_num = ARRAY_SIZE(es7154_modes), 267 .extra_routes = es7154_extra_routes, 268 .extra_route_num = ARRAY_SIZE(es7154_extra_routes), 269 .extra_widgets = es7154_extra_widgets, 270 .extra_widget_num = ARRAY_SIZE(es7154_extra_widgets), 271 }; 272 273 static int es7134_probe(struct platform_device *pdev) 274 { 275 struct device *dev = &pdev->dev; 276 struct es7134_data *priv; 277 278 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 279 if (!priv) 280 return -ENOMEM; 281 platform_set_drvdata(pdev, priv); 282 283 priv->chip = of_device_get_match_data(dev); 284 if (!priv->chip) { 285 dev_err(dev, "failed to match device\n"); 286 return -ENODEV; 287 } 288 289 return devm_snd_soc_register_component(&pdev->dev, 290 &es7134_component_driver, 291 priv->chip->dai_drv, 1); 292 } 293 294 #ifdef CONFIG_OF 295 static const struct of_device_id es7134_ids[] = { 296 { .compatible = "everest,es7134", .data = &es7134_chip }, 297 { .compatible = "everest,es7144", .data = &es7134_chip }, 298 { .compatible = "everest,es7154", .data = &es7154_chip }, 299 { } 300 }; 301 MODULE_DEVICE_TABLE(of, es7134_ids); 302 #endif 303 304 static struct platform_driver es7134_driver = { 305 .driver = { 306 .name = "es7134", 307 .of_match_table = of_match_ptr(es7134_ids), 308 }, 309 .probe = es7134_probe, 310 }; 311 312 module_platform_driver(es7134_driver); 313 314 MODULE_DESCRIPTION("ASoC ES7134 audio codec driver"); 315 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 316 MODULE_LICENSE("GPL"); 317