1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // ASoC audio graph sound card support 4 // 5 // Copyright (C) 2016 Renesas Solutions Corp. 6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 7 // 8 // based on ${LINUX}/sound/soc/generic/simple-card.c 9 10 #include <linux/clk.h> 11 #include <linux/device.h> 12 #include <linux/gpio.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/of_gpio.h> 18 #include <linux/of_graph.h> 19 #include <linux/platform_device.h> 20 #include <linux/string.h> 21 #include <sound/simple_card_utils.h> 22 23 struct graph_card_data { 24 struct snd_soc_card snd_card; 25 struct graph_dai_props { 26 struct asoc_simple_dai cpu_dai; 27 struct asoc_simple_dai codec_dai; 28 struct snd_soc_dai_link_component codecs; /* single codec */ 29 struct snd_soc_dai_link_component platform; 30 unsigned int mclk_fs; 31 } *dai_props; 32 unsigned int mclk_fs; 33 struct asoc_simple_jack hp_jack; 34 struct asoc_simple_jack mic_jack; 35 struct snd_soc_dai_link *dai_link; 36 struct gpio_desc *pa_gpio; 37 }; 38 39 static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w, 40 struct snd_kcontrol *kcontrol, 41 int event) 42 { 43 struct snd_soc_dapm_context *dapm = w->dapm; 44 struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card); 45 46 switch (event) { 47 case SND_SOC_DAPM_POST_PMU: 48 gpiod_set_value_cansleep(priv->pa_gpio, 1); 49 break; 50 case SND_SOC_DAPM_PRE_PMD: 51 gpiod_set_value_cansleep(priv->pa_gpio, 0); 52 break; 53 default: 54 return -EINVAL; 55 } 56 57 return 0; 58 } 59 60 static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = { 61 SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, 62 0, 0, NULL, 0, asoc_graph_card_outdrv_event, 63 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 64 }; 65 66 #define graph_priv_to_card(priv) (&(priv)->snd_card) 67 #define graph_priv_to_props(priv, i) ((priv)->dai_props + (i)) 68 #define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev) 69 #define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i)) 70 71 static int asoc_graph_card_startup(struct snd_pcm_substream *substream) 72 { 73 struct snd_soc_pcm_runtime *rtd = substream->private_data; 74 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); 75 struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num); 76 int ret; 77 78 ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai); 79 if (ret) 80 return ret; 81 82 ret = asoc_simple_card_clk_enable(&dai_props->codec_dai); 83 if (ret) 84 asoc_simple_card_clk_disable(&dai_props->cpu_dai); 85 86 return ret; 87 } 88 89 static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream) 90 { 91 struct snd_soc_pcm_runtime *rtd = substream->private_data; 92 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); 93 struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num); 94 95 asoc_simple_card_clk_disable(&dai_props->cpu_dai); 96 97 asoc_simple_card_clk_disable(&dai_props->codec_dai); 98 } 99 100 static int asoc_graph_card_hw_params(struct snd_pcm_substream *substream, 101 struct snd_pcm_hw_params *params) 102 { 103 struct snd_soc_pcm_runtime *rtd = substream->private_data; 104 struct snd_soc_dai *codec_dai = rtd->codec_dai; 105 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 106 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); 107 struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num); 108 unsigned int mclk, mclk_fs = 0; 109 int ret = 0; 110 111 if (priv->mclk_fs) 112 mclk_fs = priv->mclk_fs; 113 else if (dai_props->mclk_fs) 114 mclk_fs = dai_props->mclk_fs; 115 116 if (mclk_fs) { 117 mclk = params_rate(params) * mclk_fs; 118 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, 119 SND_SOC_CLOCK_IN); 120 if (ret && ret != -ENOTSUPP) 121 goto err; 122 123 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, 124 SND_SOC_CLOCK_OUT); 125 if (ret && ret != -ENOTSUPP) 126 goto err; 127 } 128 return 0; 129 err: 130 return ret; 131 } 132 133 static const struct snd_soc_ops asoc_graph_card_ops = { 134 .startup = asoc_graph_card_startup, 135 .shutdown = asoc_graph_card_shutdown, 136 .hw_params = asoc_graph_card_hw_params, 137 }; 138 139 static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd) 140 { 141 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); 142 struct snd_soc_dai *codec = rtd->codec_dai; 143 struct snd_soc_dai *cpu = rtd->cpu_dai; 144 struct graph_dai_props *dai_props = 145 graph_priv_to_props(priv, rtd->num); 146 int ret; 147 148 ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai); 149 if (ret < 0) 150 return ret; 151 152 ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai); 153 if (ret < 0) 154 return ret; 155 156 return 0; 157 } 158 159 static int asoc_graph_card_dai_link_of(struct device_node *cpu_port, 160 struct graph_card_data *priv, 161 int idx) 162 { 163 struct device *dev = graph_priv_to_dev(priv); 164 struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); 165 struct graph_dai_props *dai_props = graph_priv_to_props(priv, idx); 166 struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai; 167 struct asoc_simple_dai *codec_dai = &dai_props->codec_dai; 168 struct device_node *cpu_ep = of_get_next_child(cpu_port, NULL); 169 struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep); 170 struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep); 171 int ret; 172 173 if (rcpu_ep != cpu_ep) { 174 dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n", 175 cpu_ep->name, codec_ep->name, rcpu_ep->name); 176 ret = -EINVAL; 177 goto dai_link_of_err; 178 } 179 180 ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, 181 NULL, &dai_link->dai_fmt); 182 if (ret < 0) 183 goto dai_link_of_err; 184 185 of_property_read_u32(cpu_ep, "mclk-fs", &dai_props->mclk_fs); 186 of_property_read_u32(codec_ep, "mclk-fs", &dai_props->mclk_fs); 187 188 ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link); 189 if (ret < 0) 190 goto dai_link_of_err; 191 192 ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link); 193 if (ret < 0) 194 goto dai_link_of_err; 195 196 ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai); 197 if (ret < 0) 198 goto dai_link_of_err; 199 200 ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai); 201 if (ret < 0) 202 goto dai_link_of_err; 203 204 ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai); 205 if (ret < 0) 206 goto dai_link_of_err; 207 208 ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai); 209 if (ret < 0) 210 goto dai_link_of_err; 211 212 ret = asoc_simple_card_canonicalize_dailink(dai_link); 213 if (ret < 0) 214 goto dai_link_of_err; 215 216 ret = asoc_simple_card_set_dailink_name(dev, dai_link, 217 "%s-%s", 218 dai_link->cpu_dai_name, 219 dai_link->codecs->dai_name); 220 if (ret < 0) 221 goto dai_link_of_err; 222 223 dai_link->ops = &asoc_graph_card_ops; 224 dai_link->init = asoc_graph_card_dai_init; 225 226 asoc_simple_card_canonicalize_cpu(dai_link, 227 of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1); 228 229 dai_link_of_err: 230 of_node_put(cpu_ep); 231 of_node_put(rcpu_ep); 232 of_node_put(codec_ep); 233 234 return ret; 235 } 236 237 static int asoc_graph_card_parse_of(struct graph_card_data *priv) 238 { 239 struct of_phandle_iterator it; 240 struct device *dev = graph_priv_to_dev(priv); 241 struct snd_soc_card *card = graph_priv_to_card(priv); 242 struct device_node *node = dev->of_node; 243 int rc, idx = 0; 244 int ret; 245 246 ret = asoc_simple_card_of_parse_widgets(card, NULL); 247 if (ret < 0) 248 return ret; 249 250 ret = asoc_simple_card_of_parse_routing(card, NULL, 1); 251 if (ret < 0) 252 return ret; 253 254 /* Factor to mclk, used in hw_params() */ 255 of_property_read_u32(node, "mclk-fs", &priv->mclk_fs); 256 257 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { 258 ret = asoc_graph_card_dai_link_of(it.node, priv, idx++); 259 if (ret < 0) { 260 of_node_put(it.node); 261 262 return ret; 263 } 264 } 265 266 return asoc_simple_card_parse_card_name(card, NULL); 267 } 268 269 static int asoc_graph_get_dais_count(struct device *dev) 270 { 271 struct of_phandle_iterator it; 272 struct device_node *node = dev->of_node; 273 int count = 0; 274 int rc; 275 276 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) 277 count++; 278 279 return count; 280 } 281 282 static int asoc_graph_soc_card_probe(struct snd_soc_card *card) 283 { 284 struct graph_card_data *priv = snd_soc_card_get_drvdata(card); 285 int ret; 286 287 ret = asoc_simple_card_init_hp(card, &priv->hp_jack, NULL); 288 if (ret < 0) 289 return ret; 290 291 ret = asoc_simple_card_init_mic(card, &priv->mic_jack, NULL); 292 if (ret < 0) 293 return ret; 294 295 return 0; 296 } 297 298 static int asoc_graph_card_probe(struct platform_device *pdev) 299 { 300 struct graph_card_data *priv; 301 struct snd_soc_dai_link *dai_link; 302 struct graph_dai_props *dai_props; 303 struct device *dev = &pdev->dev; 304 struct snd_soc_card *card; 305 int num, ret, i; 306 307 /* Allocate the private data and the DAI link array */ 308 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 309 if (!priv) 310 return -ENOMEM; 311 312 num = asoc_graph_get_dais_count(dev); 313 if (num == 0) 314 return -EINVAL; 315 316 dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL); 317 dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL); 318 if (!dai_props || !dai_link) 319 return -ENOMEM; 320 321 /* 322 * Use snd_soc_dai_link_component instead of legacy style 323 * It is codec only. but cpu/platform will be supported in the future. 324 * see 325 * soc-core.c :: snd_soc_init_multicodec() 326 */ 327 for (i = 0; i < num; i++) { 328 dai_link[i].codecs = &dai_props[i].codecs; 329 dai_link[i].num_codecs = 1; 330 dai_link[i].platform = &dai_props[i].platform; 331 } 332 333 priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); 334 if (IS_ERR(priv->pa_gpio)) { 335 ret = PTR_ERR(priv->pa_gpio); 336 dev_err(dev, "failed to get amplifier gpio: %d\n", ret); 337 return ret; 338 } 339 340 priv->dai_props = dai_props; 341 priv->dai_link = dai_link; 342 343 /* Init snd_soc_card */ 344 card = graph_priv_to_card(priv); 345 card->owner = THIS_MODULE; 346 card->dev = dev; 347 card->dai_link = dai_link; 348 card->num_links = num; 349 card->dapm_widgets = asoc_graph_card_dapm_widgets; 350 card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets); 351 card->probe = asoc_graph_soc_card_probe; 352 353 ret = asoc_graph_card_parse_of(priv); 354 if (ret < 0) { 355 if (ret != -EPROBE_DEFER) 356 dev_err(dev, "parse error %d\n", ret); 357 goto err; 358 } 359 360 snd_soc_card_set_drvdata(card, priv); 361 362 ret = devm_snd_soc_register_card(dev, card); 363 if (ret < 0) 364 goto err; 365 366 return 0; 367 err: 368 asoc_simple_card_clean_reference(card); 369 370 return ret; 371 } 372 373 static int asoc_graph_card_remove(struct platform_device *pdev) 374 { 375 struct snd_soc_card *card = platform_get_drvdata(pdev); 376 377 return asoc_simple_card_clean_reference(card); 378 } 379 380 static const struct of_device_id asoc_graph_of_match[] = { 381 { .compatible = "audio-graph-card", }, 382 {}, 383 }; 384 MODULE_DEVICE_TABLE(of, asoc_graph_of_match); 385 386 static struct platform_driver asoc_graph_card = { 387 .driver = { 388 .name = "asoc-audio-graph-card", 389 .pm = &snd_soc_pm_ops, 390 .of_match_table = asoc_graph_of_match, 391 }, 392 .probe = asoc_graph_card_probe, 393 .remove = asoc_graph_card_remove, 394 }; 395 module_platform_driver(asoc_graph_card); 396 397 MODULE_ALIAS("platform:asoc-audio-graph-card"); 398 MODULE_LICENSE("GPL v2"); 399 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 400 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 401