| 1 | /* |
| 2 | * ASoC simple sound card support |
| 3 | * |
| 4 | * Copyright (C) 2012 Renesas Solutions Corp. |
| 5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/clk.h> |
| 12 | #include <linux/device.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/of.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/string.h> |
| 17 | #include <sound/simple_card.h> |
| 18 | #include <sound/soc-dai.h> |
| 19 | #include <sound/soc.h> |
| 20 | |
| 21 | struct simple_card_data { |
| 22 | struct snd_soc_card snd_card; |
| 23 | struct simple_dai_props { |
| 24 | struct asoc_simple_dai cpu_dai; |
| 25 | struct asoc_simple_dai codec_dai; |
| 26 | } *dai_props; |
| 27 | unsigned int mclk_fs; |
| 28 | struct snd_soc_dai_link dai_link[]; /* dynamically allocated */ |
| 29 | }; |
| 30 | |
| 31 | static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream, |
| 32 | struct snd_pcm_hw_params *params) |
| 33 | { |
| 34 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 35 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| 36 | struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); |
| 37 | unsigned int mclk; |
| 38 | int ret = 0; |
| 39 | |
| 40 | if (priv->mclk_fs) { |
| 41 | mclk = params_rate(params) * priv->mclk_fs; |
| 42 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, |
| 43 | SND_SOC_CLOCK_IN); |
| 44 | } |
| 45 | |
| 46 | return ret; |
| 47 | } |
| 48 | |
| 49 | static struct snd_soc_ops asoc_simple_card_ops = { |
| 50 | .hw_params = asoc_simple_card_hw_params, |
| 51 | }; |
| 52 | |
| 53 | static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, |
| 54 | struct asoc_simple_dai *set) |
| 55 | { |
| 56 | int ret; |
| 57 | |
| 58 | if (set->fmt) { |
| 59 | ret = snd_soc_dai_set_fmt(dai, set->fmt); |
| 60 | if (ret && ret != -ENOTSUPP) { |
| 61 | dev_err(dai->dev, "simple-card: set_fmt error\n"); |
| 62 | goto err; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | if (set->sysclk) { |
| 67 | ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0); |
| 68 | if (ret && ret != -ENOTSUPP) { |
| 69 | dev_err(dai->dev, "simple-card: set_sysclk error\n"); |
| 70 | goto err; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | if (set->slots) { |
| 75 | ret = snd_soc_dai_set_tdm_slot(dai, 0, 0, |
| 76 | set->slots, |
| 77 | set->slot_width); |
| 78 | if (ret && ret != -ENOTSUPP) { |
| 79 | dev_err(dai->dev, "simple-card: set_tdm_slot error\n"); |
| 80 | goto err; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | ret = 0; |
| 85 | |
| 86 | err: |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) |
| 91 | { |
| 92 | struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); |
| 93 | struct snd_soc_dai *codec = rtd->codec_dai; |
| 94 | struct snd_soc_dai *cpu = rtd->cpu_dai; |
| 95 | struct simple_dai_props *dai_props; |
| 96 | int num, ret; |
| 97 | |
| 98 | num = rtd - rtd->card->rtd; |
| 99 | dai_props = &priv->dai_props[num]; |
| 100 | ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai); |
| 101 | if (ret < 0) |
| 102 | return ret; |
| 103 | |
| 104 | ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai); |
| 105 | if (ret < 0) |
| 106 | return ret; |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static int |
| 112 | asoc_simple_card_sub_parse_of(struct device_node *np, |
| 113 | struct asoc_simple_dai *dai, |
| 114 | struct device_node **p_node, |
| 115 | const char **name) |
| 116 | { |
| 117 | struct device_node *node; |
| 118 | struct clk *clk; |
| 119 | u32 val; |
| 120 | int ret; |
| 121 | |
| 122 | /* |
| 123 | * get node via "sound-dai = <&phandle port>" |
| 124 | * it will be used as xxx_of_node on soc_bind_dai_link() |
| 125 | */ |
| 126 | node = of_parse_phandle(np, "sound-dai", 0); |
| 127 | if (!node) |
| 128 | return -ENODEV; |
| 129 | *p_node = node; |
| 130 | |
| 131 | /* get dai->name */ |
| 132 | ret = snd_soc_of_get_dai_name(np, name); |
| 133 | if (ret < 0) |
| 134 | return ret; |
| 135 | |
| 136 | /* parse TDM slot */ |
| 137 | ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width); |
| 138 | if (ret) |
| 139 | return ret; |
| 140 | |
| 141 | /* |
| 142 | * dai->sysclk come from |
| 143 | * "clocks = <&xxx>" (if system has common clock) |
| 144 | * or "system-clock-frequency = <xxx>" |
| 145 | * or device's module clock. |
| 146 | */ |
| 147 | if (of_property_read_bool(np, "clocks")) { |
| 148 | clk = of_clk_get(np, 0); |
| 149 | if (IS_ERR(clk)) { |
| 150 | ret = PTR_ERR(clk); |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | dai->sysclk = clk_get_rate(clk); |
| 155 | } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) { |
| 156 | dai->sysclk = val; |
| 157 | } else { |
| 158 | clk = of_clk_get(node, 0); |
| 159 | if (!IS_ERR(clk)) |
| 160 | dai->sysclk = clk_get_rate(clk); |
| 161 | } |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int asoc_simple_card_dai_link_of(struct device_node *node, |
| 167 | struct device *dev, |
| 168 | struct snd_soc_dai_link *dai_link, |
| 169 | struct simple_dai_props *dai_props, |
| 170 | bool is_top_level_node) |
| 171 | { |
| 172 | struct device_node *np = NULL; |
| 173 | struct device_node *bitclkmaster = NULL; |
| 174 | struct device_node *framemaster = NULL; |
| 175 | unsigned int daifmt; |
| 176 | char *name; |
| 177 | char prop[128]; |
| 178 | char *prefix = ""; |
| 179 | int ret; |
| 180 | |
| 181 | if (is_top_level_node) |
| 182 | prefix = "simple-audio-card,"; |
| 183 | |
| 184 | daifmt = snd_soc_of_parse_daifmt(node, prefix, |
| 185 | &bitclkmaster, &framemaster); |
| 186 | daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK; |
| 187 | |
| 188 | snprintf(prop, sizeof(prop), "%scpu", prefix); |
| 189 | np = of_get_child_by_name(node, prop); |
| 190 | if (!np) { |
| 191 | ret = -EINVAL; |
| 192 | dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop); |
| 193 | goto dai_link_of_err; |
| 194 | } |
| 195 | |
| 196 | ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai, |
| 197 | &dai_link->cpu_of_node, |
| 198 | &dai_link->cpu_dai_name); |
| 199 | if (ret < 0) |
| 200 | goto dai_link_of_err; |
| 201 | |
| 202 | dai_props->cpu_dai.fmt = daifmt; |
| 203 | switch (((np == bitclkmaster) << 4) | (np == framemaster)) { |
| 204 | case 0x11: |
| 205 | dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS; |
| 206 | break; |
| 207 | case 0x10: |
| 208 | dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM; |
| 209 | break; |
| 210 | case 0x01: |
| 211 | dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS; |
| 212 | break; |
| 213 | default: |
| 214 | dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM; |
| 215 | break; |
| 216 | } |
| 217 | |
| 218 | of_node_put(np); |
| 219 | snprintf(prop, sizeof(prop), "%scodec", prefix); |
| 220 | np = of_get_child_by_name(node, prop); |
| 221 | if (!np) { |
| 222 | ret = -EINVAL; |
| 223 | dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop); |
| 224 | goto dai_link_of_err; |
| 225 | } |
| 226 | |
| 227 | ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai, |
| 228 | &dai_link->codec_of_node, |
| 229 | &dai_link->codec_dai_name); |
| 230 | if (ret < 0) |
| 231 | goto dai_link_of_err; |
| 232 | |
| 233 | if (strlen(prefix) && !bitclkmaster && !framemaster) { |
| 234 | /* No dai-link level and master setting was not found from |
| 235 | sound node level, revert back to legacy DT parsing and |
| 236 | take the settings from codec node. */ |
| 237 | dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n", |
| 238 | __func__); |
| 239 | dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt = |
| 240 | snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) | |
| 241 | (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK); |
| 242 | } else { |
| 243 | dai_props->codec_dai.fmt = daifmt; |
| 244 | switch (((np == bitclkmaster) << 4) | (np == framemaster)) { |
| 245 | case 0x11: |
| 246 | dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM; |
| 247 | break; |
| 248 | case 0x10: |
| 249 | dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS; |
| 250 | break; |
| 251 | case 0x01: |
| 252 | dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM; |
| 253 | break; |
| 254 | default: |
| 255 | dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS; |
| 256 | break; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) { |
| 261 | ret = -EINVAL; |
| 262 | goto dai_link_of_err; |
| 263 | } |
| 264 | |
| 265 | /* simple-card assumes platform == cpu */ |
| 266 | dai_link->platform_of_node = dai_link->cpu_of_node; |
| 267 | |
| 268 | /* Link name is created from CPU/CODEC dai name */ |
| 269 | name = devm_kzalloc(dev, |
| 270 | strlen(dai_link->cpu_dai_name) + |
| 271 | strlen(dai_link->codec_dai_name) + 2, |
| 272 | GFP_KERNEL); |
| 273 | sprintf(name, "%s-%s", dai_link->cpu_dai_name, |
| 274 | dai_link->codec_dai_name); |
| 275 | dai_link->name = dai_link->stream_name = name; |
| 276 | dai_link->ops = &asoc_simple_card_ops; |
| 277 | dai_link->init = asoc_simple_card_dai_init; |
| 278 | |
| 279 | dev_dbg(dev, "\tname : %s\n", dai_link->stream_name); |
| 280 | dev_dbg(dev, "\tcpu : %s / %04x / %d\n", |
| 281 | dai_link->cpu_dai_name, |
| 282 | dai_props->cpu_dai.fmt, |
| 283 | dai_props->cpu_dai.sysclk); |
| 284 | dev_dbg(dev, "\tcodec : %s / %04x / %d\n", |
| 285 | dai_link->codec_dai_name, |
| 286 | dai_props->codec_dai.fmt, |
| 287 | dai_props->codec_dai.sysclk); |
| 288 | |
| 289 | /* |
| 290 | * soc_bind_dai_link() will check cpu name |
| 291 | * after of_node matching if dai_link has cpu_dai_name. |
| 292 | * but, it will never match if name was created by fmt_single_name() |
| 293 | * remove cpu_dai_name to escape name matching. |
| 294 | * see |
| 295 | * fmt_single_name() |
| 296 | * fmt_multiple_name() |
| 297 | */ |
| 298 | dai_link->cpu_dai_name = NULL; |
| 299 | |
| 300 | dai_link_of_err: |
| 301 | if (np) |
| 302 | of_node_put(np); |
| 303 | if (bitclkmaster) |
| 304 | of_node_put(bitclkmaster); |
| 305 | if (framemaster) |
| 306 | of_node_put(framemaster); |
| 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | static int asoc_simple_card_parse_of(struct device_node *node, |
| 311 | struct simple_card_data *priv, |
| 312 | struct device *dev, |
| 313 | int multi) |
| 314 | { |
| 315 | struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link; |
| 316 | struct simple_dai_props *dai_props = priv->dai_props; |
| 317 | u32 val; |
| 318 | int ret; |
| 319 | |
| 320 | /* parsing the card name from DT */ |
| 321 | snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name"); |
| 322 | |
| 323 | /* off-codec widgets */ |
| 324 | if (of_property_read_bool(node, "simple-audio-card,widgets")) { |
| 325 | ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card, |
| 326 | "simple-audio-card,widgets"); |
| 327 | if (ret) |
| 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | /* DAPM routes */ |
| 332 | if (of_property_read_bool(node, "simple-audio-card,routing")) { |
| 333 | ret = snd_soc_of_parse_audio_routing(&priv->snd_card, |
| 334 | "simple-audio-card,routing"); |
| 335 | if (ret) |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | /* Factor to mclk, used in hw_params() */ |
| 340 | ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val); |
| 341 | if (ret == 0) |
| 342 | priv->mclk_fs = val; |
| 343 | |
| 344 | dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ? |
| 345 | priv->snd_card.name : ""); |
| 346 | |
| 347 | if (multi) { |
| 348 | struct device_node *np = NULL; |
| 349 | int i; |
| 350 | for (i = 0; (np = of_get_next_child(node, np)); i++) { |
| 351 | dev_dbg(dev, "\tlink %d:\n", i); |
| 352 | ret = asoc_simple_card_dai_link_of(np, dev, |
| 353 | dai_link + i, |
| 354 | dai_props + i, |
| 355 | false); |
| 356 | if (ret < 0) { |
| 357 | of_node_put(np); |
| 358 | return ret; |
| 359 | } |
| 360 | } |
| 361 | } else { |
| 362 | ret = asoc_simple_card_dai_link_of(node, dev, |
| 363 | dai_link, dai_props, true); |
| 364 | if (ret < 0) |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | if (!priv->snd_card.name) |
| 369 | priv->snd_card.name = priv->snd_card.dai_link->name; |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | /* update the reference count of the devices nodes at end of probe */ |
| 375 | static int asoc_simple_card_unref(struct platform_device *pdev) |
| 376 | { |
| 377 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
| 378 | struct snd_soc_dai_link *dai_link; |
| 379 | struct device_node *np; |
| 380 | int num_links; |
| 381 | |
| 382 | for (num_links = 0, dai_link = card->dai_link; |
| 383 | num_links < card->num_links; |
| 384 | num_links++, dai_link++) { |
| 385 | np = (struct device_node *) dai_link->cpu_of_node; |
| 386 | if (np) |
| 387 | of_node_put(np); |
| 388 | np = (struct device_node *) dai_link->codec_of_node; |
| 389 | if (np) |
| 390 | of_node_put(np); |
| 391 | } |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static int asoc_simple_card_probe(struct platform_device *pdev) |
| 396 | { |
| 397 | struct simple_card_data *priv; |
| 398 | struct snd_soc_dai_link *dai_link; |
| 399 | struct device_node *np = pdev->dev.of_node; |
| 400 | struct device *dev = &pdev->dev; |
| 401 | int num_links, multi, ret; |
| 402 | |
| 403 | /* get the number of DAI links */ |
| 404 | if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) { |
| 405 | num_links = of_get_child_count(np); |
| 406 | multi = 1; |
| 407 | } else { |
| 408 | num_links = 1; |
| 409 | multi = 0; |
| 410 | } |
| 411 | |
| 412 | /* allocate the private data and the DAI link array */ |
| 413 | priv = devm_kzalloc(dev, |
| 414 | sizeof(*priv) + sizeof(*dai_link) * num_links, |
| 415 | GFP_KERNEL); |
| 416 | if (!priv) |
| 417 | return -ENOMEM; |
| 418 | |
| 419 | /* |
| 420 | * init snd_soc_card |
| 421 | */ |
| 422 | priv->snd_card.owner = THIS_MODULE; |
| 423 | priv->snd_card.dev = dev; |
| 424 | dai_link = priv->dai_link; |
| 425 | priv->snd_card.dai_link = dai_link; |
| 426 | priv->snd_card.num_links = num_links; |
| 427 | |
| 428 | /* get room for the other properties */ |
| 429 | priv->dai_props = devm_kzalloc(dev, |
| 430 | sizeof(*priv->dai_props) * num_links, |
| 431 | GFP_KERNEL); |
| 432 | if (!priv->dai_props) |
| 433 | return -ENOMEM; |
| 434 | |
| 435 | if (np && of_device_is_available(np)) { |
| 436 | |
| 437 | ret = asoc_simple_card_parse_of(np, priv, dev, multi); |
| 438 | if (ret < 0) { |
| 439 | if (ret != -EPROBE_DEFER) |
| 440 | dev_err(dev, "parse error %d\n", ret); |
| 441 | goto err; |
| 442 | } |
| 443 | |
| 444 | } else { |
| 445 | struct asoc_simple_card_info *cinfo; |
| 446 | |
| 447 | cinfo = dev->platform_data; |
| 448 | if (!cinfo) { |
| 449 | dev_err(dev, "no info for asoc-simple-card\n"); |
| 450 | return -EINVAL; |
| 451 | } |
| 452 | |
| 453 | if (!cinfo->name || |
| 454 | !cinfo->codec_dai.name || |
| 455 | !cinfo->codec || |
| 456 | !cinfo->platform || |
| 457 | !cinfo->cpu_dai.name) { |
| 458 | dev_err(dev, "insufficient asoc_simple_card_info settings\n"); |
| 459 | return -EINVAL; |
| 460 | } |
| 461 | |
| 462 | priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name; |
| 463 | dai_link->name = cinfo->name; |
| 464 | dai_link->stream_name = cinfo->name; |
| 465 | dai_link->platform_name = cinfo->platform; |
| 466 | dai_link->codec_name = cinfo->codec; |
| 467 | dai_link->cpu_dai_name = cinfo->cpu_dai.name; |
| 468 | dai_link->codec_dai_name = cinfo->codec_dai.name; |
| 469 | dai_link->init = asoc_simple_card_dai_init; |
| 470 | memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai, |
| 471 | sizeof(priv->dai_props->cpu_dai)); |
| 472 | memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai, |
| 473 | sizeof(priv->dai_props->codec_dai)); |
| 474 | |
| 475 | priv->dai_props->cpu_dai.fmt |= cinfo->daifmt; |
| 476 | priv->dai_props->codec_dai.fmt |= cinfo->daifmt; |
| 477 | } |
| 478 | |
| 479 | snd_soc_card_set_drvdata(&priv->snd_card, priv); |
| 480 | |
| 481 | ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card); |
| 482 | |
| 483 | err: |
| 484 | asoc_simple_card_unref(pdev); |
| 485 | return ret; |
| 486 | } |
| 487 | |
| 488 | static const struct of_device_id asoc_simple_of_match[] = { |
| 489 | { .compatible = "simple-audio-card", }, |
| 490 | {}, |
| 491 | }; |
| 492 | MODULE_DEVICE_TABLE(of, asoc_simple_of_match); |
| 493 | |
| 494 | static struct platform_driver asoc_simple_card = { |
| 495 | .driver = { |
| 496 | .name = "asoc-simple-card", |
| 497 | .owner = THIS_MODULE, |
| 498 | .of_match_table = asoc_simple_of_match, |
| 499 | }, |
| 500 | .probe = asoc_simple_card_probe, |
| 501 | }; |
| 502 | |
| 503 | module_platform_driver(asoc_simple_card); |
| 504 | |
| 505 | MODULE_ALIAS("platform:asoc-simple-card"); |
| 506 | MODULE_LICENSE("GPL"); |
| 507 | MODULE_DESCRIPTION("ASoC Simple Sound Card"); |
| 508 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |