1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Copyright (c) 2020 BayLibre, SAS. 4 // Author: Jerome Brunet <jbrunet@baylibre.com> 5 6 #include <linux/module.h> 7 #include <linux/of_platform.h> 8 #include <sound/soc.h> 9 10 #include "meson-card.h" 11 meson_card_i2s_set_sysclk(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,unsigned int mclk_fs)12 int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream, 13 struct snd_pcm_hw_params *params, 14 unsigned int mclk_fs) 15 { 16 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 17 struct snd_soc_dai *codec_dai; 18 unsigned int mclk; 19 int ret, i; 20 21 if (!mclk_fs) 22 return 0; 23 24 mclk = params_rate(params) * mclk_fs; 25 26 for_each_rtd_codec_dais(rtd, i, codec_dai) { 27 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, 28 SND_SOC_CLOCK_IN); 29 if (ret && ret != -ENOTSUPP) 30 return ret; 31 } 32 33 ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk, 34 SND_SOC_CLOCK_OUT); 35 if (ret && ret != -ENOTSUPP) 36 return ret; 37 38 return 0; 39 } 40 EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk); 41 meson_card_reallocate_links(struct snd_soc_card * card,unsigned int num_links)42 int meson_card_reallocate_links(struct snd_soc_card *card, 43 unsigned int num_links) 44 { 45 struct meson_card *priv = snd_soc_card_get_drvdata(card); 46 struct snd_soc_dai_link *links; 47 void **ldata; 48 49 links = krealloc(priv->card.dai_link, 50 num_links * sizeof(*priv->card.dai_link), 51 GFP_KERNEL | __GFP_ZERO); 52 if (!links) 53 goto err_links; 54 55 ldata = krealloc(priv->link_data, 56 num_links * sizeof(*priv->link_data), 57 GFP_KERNEL | __GFP_ZERO); 58 if (!ldata) 59 goto err_ldata; 60 61 priv->card.dai_link = links; 62 priv->link_data = ldata; 63 priv->card.num_links = num_links; 64 return 0; 65 66 err_ldata: 67 kfree(links); 68 err_links: 69 dev_err(priv->card.dev, "failed to allocate links\n"); 70 return -ENOMEM; 71 72 } 73 EXPORT_SYMBOL_GPL(meson_card_reallocate_links); 74 meson_card_parse_dai(struct snd_soc_card * card,struct device_node * node,struct device_node ** dai_of_node,const char ** dai_name)75 int meson_card_parse_dai(struct snd_soc_card *card, 76 struct device_node *node, 77 struct device_node **dai_of_node, 78 const char **dai_name) 79 { 80 struct of_phandle_args args; 81 int ret; 82 83 if (!dai_name || !dai_of_node || !node) 84 return -EINVAL; 85 86 ret = of_parse_phandle_with_args(node, "sound-dai", 87 "#sound-dai-cells", 0, &args); 88 if (ret) { 89 if (ret != -EPROBE_DEFER) 90 dev_err(card->dev, "can't parse dai %d\n", ret); 91 return ret; 92 } 93 *dai_of_node = args.np; 94 95 return snd_soc_get_dai_name(&args, dai_name); 96 } 97 EXPORT_SYMBOL_GPL(meson_card_parse_dai); 98 meson_card_set_link_name(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,const char * prefix)99 static int meson_card_set_link_name(struct snd_soc_card *card, 100 struct snd_soc_dai_link *link, 101 struct device_node *node, 102 const char *prefix) 103 { 104 char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s", 105 prefix, node->full_name); 106 if (!name) 107 return -ENOMEM; 108 109 link->name = name; 110 link->stream_name = name; 111 112 return 0; 113 } 114 meson_card_parse_daifmt(struct device_node * node,struct device_node * cpu_node)115 unsigned int meson_card_parse_daifmt(struct device_node *node, 116 struct device_node *cpu_node) 117 { 118 struct device_node *bitclkmaster = NULL; 119 struct device_node *framemaster = NULL; 120 unsigned int daifmt; 121 122 daifmt = snd_soc_daifmt_parse_format(node, NULL); 123 124 snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster); 125 126 /* If no master is provided, default to cpu master */ 127 if (!bitclkmaster || bitclkmaster == cpu_node) { 128 daifmt |= (!framemaster || framemaster == cpu_node) ? 129 SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM; 130 } else { 131 daifmt |= (!framemaster || framemaster == cpu_node) ? 132 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM; 133 } 134 135 of_node_put(bitclkmaster); 136 of_node_put(framemaster); 137 138 return daifmt; 139 } 140 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt); 141 meson_card_set_be_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node)142 int meson_card_set_be_link(struct snd_soc_card *card, 143 struct snd_soc_dai_link *link, 144 struct device_node *node) 145 { 146 struct snd_soc_dai_link_component *codec; 147 struct device_node *np; 148 int ret, num_codecs; 149 150 num_codecs = of_get_child_count(node); 151 if (!num_codecs) { 152 dev_err(card->dev, "be link %s has no codec\n", 153 node->full_name); 154 return -EINVAL; 155 } 156 157 codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL); 158 if (!codec) 159 return -ENOMEM; 160 161 link->codecs = codec; 162 link->num_codecs = num_codecs; 163 164 for_each_child_of_node(node, np) { 165 ret = meson_card_parse_dai(card, np, &codec->of_node, 166 &codec->dai_name); 167 if (ret) { 168 of_node_put(np); 169 return ret; 170 } 171 172 codec++; 173 } 174 175 ret = meson_card_set_link_name(card, link, node, "be"); 176 if (ret) 177 dev_err(card->dev, "error setting %pOFn link name\n", np); 178 179 return ret; 180 } 181 EXPORT_SYMBOL_GPL(meson_card_set_be_link); 182 meson_card_set_fe_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,bool is_playback)183 int meson_card_set_fe_link(struct snd_soc_card *card, 184 struct snd_soc_dai_link *link, 185 struct device_node *node, 186 bool is_playback) 187 { 188 struct snd_soc_dai_link_component *codec; 189 190 codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL); 191 if (!codec) 192 return -ENOMEM; 193 194 link->codecs = codec; 195 link->num_codecs = 1; 196 197 link->dynamic = 1; 198 link->dpcm_merged_format = 1; 199 link->dpcm_merged_chan = 1; 200 link->dpcm_merged_rate = 1; 201 link->codecs->dai_name = "snd-soc-dummy-dai"; 202 link->codecs->name = "snd-soc-dummy"; 203 204 if (is_playback) 205 link->dpcm_playback = 1; 206 else 207 link->dpcm_capture = 1; 208 209 return meson_card_set_link_name(card, link, node, "fe"); 210 } 211 EXPORT_SYMBOL_GPL(meson_card_set_fe_link); 212 meson_card_add_links(struct snd_soc_card * card)213 static int meson_card_add_links(struct snd_soc_card *card) 214 { 215 struct meson_card *priv = snd_soc_card_get_drvdata(card); 216 struct device_node *node = card->dev->of_node; 217 struct device_node *np; 218 int num, i, ret; 219 220 num = of_get_child_count(node); 221 if (!num) { 222 dev_err(card->dev, "card has no links\n"); 223 return -EINVAL; 224 } 225 226 ret = meson_card_reallocate_links(card, num); 227 if (ret) 228 return ret; 229 230 i = 0; 231 for_each_child_of_node(node, np) { 232 ret = priv->match_data->add_link(card, np, &i); 233 if (ret) { 234 of_node_put(np); 235 return ret; 236 } 237 238 i++; 239 } 240 241 return 0; 242 } 243 meson_card_parse_of_optional(struct snd_soc_card * card,const char * propname,int (* func)(struct snd_soc_card * c,const char * p))244 static int meson_card_parse_of_optional(struct snd_soc_card *card, 245 const char *propname, 246 int (*func)(struct snd_soc_card *c, 247 const char *p)) 248 { 249 /* If property is not provided, don't fail ... */ 250 if (!of_property_read_bool(card->dev->of_node, propname)) 251 return 0; 252 253 /* ... but do fail if it is provided and the parsing fails */ 254 return func(card, propname); 255 } 256 meson_card_clean_references(struct meson_card * priv)257 static void meson_card_clean_references(struct meson_card *priv) 258 { 259 struct snd_soc_card *card = &priv->card; 260 struct snd_soc_dai_link *link; 261 struct snd_soc_dai_link_component *codec; 262 struct snd_soc_aux_dev *aux; 263 int i, j; 264 265 if (card->dai_link) { 266 for_each_card_prelinks(card, i, link) { 267 if (link->cpus) 268 of_node_put(link->cpus->of_node); 269 for_each_link_codecs(link, j, codec) 270 of_node_put(codec->of_node); 271 } 272 } 273 274 if (card->aux_dev) { 275 for_each_card_pre_auxs(card, i, aux) 276 of_node_put(aux->dlc.of_node); 277 } 278 279 kfree(card->dai_link); 280 kfree(priv->link_data); 281 } 282 meson_card_probe(struct platform_device * pdev)283 int meson_card_probe(struct platform_device *pdev) 284 { 285 const struct meson_card_match_data *data; 286 struct device *dev = &pdev->dev; 287 struct meson_card *priv; 288 int ret; 289 290 data = of_device_get_match_data(dev); 291 if (!data) { 292 dev_err(dev, "failed to match device\n"); 293 return -ENODEV; 294 } 295 296 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 297 if (!priv) 298 return -ENOMEM; 299 300 platform_set_drvdata(pdev, priv); 301 snd_soc_card_set_drvdata(&priv->card, priv); 302 303 priv->card.owner = THIS_MODULE; 304 priv->card.dev = dev; 305 priv->card.driver_name = dev->driver->name; 306 priv->match_data = data; 307 308 ret = snd_soc_of_parse_card_name(&priv->card, "model"); 309 if (ret < 0) 310 return ret; 311 312 ret = meson_card_parse_of_optional(&priv->card, "audio-routing", 313 snd_soc_of_parse_audio_routing); 314 if (ret) { 315 dev_err(dev, "error while parsing routing\n"); 316 return ret; 317 } 318 319 ret = meson_card_parse_of_optional(&priv->card, "audio-widgets", 320 snd_soc_of_parse_audio_simple_widgets); 321 if (ret) { 322 dev_err(dev, "error while parsing widgets\n"); 323 return ret; 324 } 325 326 ret = meson_card_add_links(&priv->card); 327 if (ret) 328 goto out_err; 329 330 ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs"); 331 if (ret) 332 goto out_err; 333 334 ret = devm_snd_soc_register_card(dev, &priv->card); 335 if (ret) 336 goto out_err; 337 338 return 0; 339 340 out_err: 341 meson_card_clean_references(priv); 342 return ret; 343 } 344 EXPORT_SYMBOL_GPL(meson_card_probe); 345 meson_card_remove(struct platform_device * pdev)346 int meson_card_remove(struct platform_device *pdev) 347 { 348 struct meson_card *priv = platform_get_drvdata(pdev); 349 350 meson_card_clean_references(priv); 351 352 return 0; 353 } 354 EXPORT_SYMBOL_GPL(meson_card_remove); 355 356 MODULE_DESCRIPTION("Amlogic Sound Card Utils"); 357 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 358 MODULE_LICENSE("GPL v2"); 359