1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) STMicroelectronics SA 2015 4 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com> 5 * for STMicroelectronics. 6 */ 7 8 #include <linux/module.h> 9 #include <linux/pinctrl/consumer.h> 10 #include <linux/delay.h> 11 12 #include "uniperif.h" 13 14 /* 15 * User frame size shall be 2, 4, 6 or 8 32-bits words length 16 * (i.e. 8, 16, 24 or 32 bytes) 17 * This constraint comes from allowed values for 18 * UNIPERIF_I2S_FMT_NUM_CH register 19 */ 20 #define UNIPERIF_MAX_FRAME_SZ 0x20 21 #define UNIPERIF_ALLOWED_FRAME_SZ (0x08 | 0x10 | 0x18 | UNIPERIF_MAX_FRAME_SZ) 22 23 struct sti_uniperiph_dev_data { 24 unsigned int id; /* Nb available player instances */ 25 unsigned int version; /* player IP version */ 26 unsigned int stream; 27 const char *dai_names; 28 enum uniperif_type type; 29 }; 30 31 static const struct sti_uniperiph_dev_data sti_uniplayer_hdmi = { 32 .id = 0, 33 .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0, 34 .stream = SNDRV_PCM_STREAM_PLAYBACK, 35 .dai_names = "Uni Player #0 (HDMI)", 36 .type = SND_ST_UNIPERIF_TYPE_HDMI 37 }; 38 39 static const struct sti_uniperiph_dev_data sti_uniplayer_pcm_out = { 40 .id = 1, 41 .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0, 42 .stream = SNDRV_PCM_STREAM_PLAYBACK, 43 .dai_names = "Uni Player #1 (PCM OUT)", 44 .type = SND_ST_UNIPERIF_TYPE_PCM | SND_ST_UNIPERIF_TYPE_TDM, 45 }; 46 47 static const struct sti_uniperiph_dev_data sti_uniplayer_dac = { 48 .id = 2, 49 .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0, 50 .stream = SNDRV_PCM_STREAM_PLAYBACK, 51 .dai_names = "Uni Player #2 (DAC)", 52 .type = SND_ST_UNIPERIF_TYPE_PCM, 53 }; 54 55 static const struct sti_uniperiph_dev_data sti_uniplayer_spdif = { 56 .id = 3, 57 .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0, 58 .stream = SNDRV_PCM_STREAM_PLAYBACK, 59 .dai_names = "Uni Player #3 (SPDIF)", 60 .type = SND_ST_UNIPERIF_TYPE_SPDIF 61 }; 62 63 static const struct sti_uniperiph_dev_data sti_unireader_pcm_in = { 64 .id = 0, 65 .version = SND_ST_UNIPERIF_VERSION_UNI_RDR_1_0, 66 .stream = SNDRV_PCM_STREAM_CAPTURE, 67 .dai_names = "Uni Reader #0 (PCM IN)", 68 .type = SND_ST_UNIPERIF_TYPE_PCM | SND_ST_UNIPERIF_TYPE_TDM, 69 }; 70 71 static const struct sti_uniperiph_dev_data sti_unireader_hdmi_in = { 72 .id = 1, 73 .version = SND_ST_UNIPERIF_VERSION_UNI_RDR_1_0, 74 .stream = SNDRV_PCM_STREAM_CAPTURE, 75 .dai_names = "Uni Reader #1 (HDMI IN)", 76 .type = SND_ST_UNIPERIF_TYPE_PCM, 77 }; 78 79 static const struct of_device_id snd_soc_sti_match[] = { 80 { .compatible = "st,stih407-uni-player-hdmi", 81 .data = &sti_uniplayer_hdmi 82 }, 83 { .compatible = "st,stih407-uni-player-pcm-out", 84 .data = &sti_uniplayer_pcm_out 85 }, 86 { .compatible = "st,stih407-uni-player-dac", 87 .data = &sti_uniplayer_dac 88 }, 89 { .compatible = "st,stih407-uni-player-spdif", 90 .data = &sti_uniplayer_spdif 91 }, 92 { .compatible = "st,stih407-uni-reader-pcm_in", 93 .data = &sti_unireader_pcm_in 94 }, 95 { .compatible = "st,stih407-uni-reader-hdmi", 96 .data = &sti_unireader_hdmi_in 97 }, 98 {}, 99 }; 100 101 int sti_uniperiph_reset(struct uniperif *uni) 102 { 103 int count = 10; 104 105 /* Reset uniperipheral uni */ 106 SET_UNIPERIF_SOFT_RST_SOFT_RST(uni); 107 108 if (uni->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { 109 while (GET_UNIPERIF_SOFT_RST_SOFT_RST(uni) && count) { 110 udelay(5); 111 count--; 112 } 113 } 114 115 if (!count) { 116 dev_err(uni->dev, "Failed to reset uniperif\n"); 117 return -EIO; 118 } 119 120 return 0; 121 } 122 123 int sti_uniperiph_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 124 unsigned int rx_mask, int slots, 125 int slot_width) 126 { 127 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 128 struct uniperif *uni = priv->dai_data.uni; 129 int i, frame_size, avail_slots; 130 131 if (!UNIPERIF_TYPE_IS_TDM(uni)) { 132 dev_err(uni->dev, "cpu dai not in tdm mode\n"); 133 return -EINVAL; 134 } 135 136 /* store info in unip context */ 137 uni->tdm_slot.slots = slots; 138 uni->tdm_slot.slot_width = slot_width; 139 /* unip is unidirectionnal */ 140 uni->tdm_slot.mask = (tx_mask != 0) ? tx_mask : rx_mask; 141 142 /* number of available timeslots */ 143 for (i = 0, avail_slots = 0; i < uni->tdm_slot.slots; i++) { 144 if ((uni->tdm_slot.mask >> i) & 0x01) 145 avail_slots++; 146 } 147 uni->tdm_slot.avail_slots = avail_slots; 148 149 /* frame size in bytes */ 150 frame_size = uni->tdm_slot.avail_slots * uni->tdm_slot.slot_width / 8; 151 152 /* check frame size is allowed */ 153 if ((frame_size > UNIPERIF_MAX_FRAME_SZ) || 154 (frame_size & ~(int)UNIPERIF_ALLOWED_FRAME_SZ)) { 155 dev_err(uni->dev, "frame size not allowed: %d bytes\n", 156 frame_size); 157 return -EINVAL; 158 } 159 160 return 0; 161 } 162 163 int sti_uniperiph_fix_tdm_chan(struct snd_pcm_hw_params *params, 164 struct snd_pcm_hw_rule *rule) 165 { 166 struct uniperif *uni = rule->private; 167 struct snd_interval t; 168 169 t.min = uni->tdm_slot.avail_slots; 170 t.max = uni->tdm_slot.avail_slots; 171 t.openmin = 0; 172 t.openmax = 0; 173 t.integer = 0; 174 175 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 176 } 177 178 int sti_uniperiph_fix_tdm_format(struct snd_pcm_hw_params *params, 179 struct snd_pcm_hw_rule *rule) 180 { 181 struct uniperif *uni = rule->private; 182 struct snd_mask *maskp = hw_param_mask(params, rule->var); 183 u64 format; 184 185 switch (uni->tdm_slot.slot_width) { 186 case 16: 187 format = SNDRV_PCM_FMTBIT_S16_LE; 188 break; 189 case 32: 190 format = SNDRV_PCM_FMTBIT_S32_LE; 191 break; 192 default: 193 dev_err(uni->dev, "format not supported: %d bits\n", 194 uni->tdm_slot.slot_width); 195 return -EINVAL; 196 } 197 198 maskp->bits[0] &= (u_int32_t)format; 199 maskp->bits[1] &= (u_int32_t)(format >> 32); 200 /* clear remaining indexes */ 201 memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX - 64) / 8); 202 203 if (!maskp->bits[0] && !maskp->bits[1]) 204 return -EINVAL; 205 206 return 0; 207 } 208 209 int sti_uniperiph_get_tdm_word_pos(struct uniperif *uni, 210 unsigned int *word_pos) 211 { 212 int slot_width = uni->tdm_slot.slot_width / 8; 213 int slots_num = uni->tdm_slot.slots; 214 unsigned int slots_mask = uni->tdm_slot.mask; 215 int i, j, k; 216 unsigned int word16_pos[4]; 217 218 /* word16_pos: 219 * word16_pos[0] = WORDX_LSB 220 * word16_pos[1] = WORDX_MSB, 221 * word16_pos[2] = WORDX+1_LSB 222 * word16_pos[3] = WORDX+1_MSB 223 */ 224 225 /* set unip word position */ 226 for (i = 0, j = 0, k = 0; (i < slots_num) && (k < WORD_MAX); i++) { 227 if ((slots_mask >> i) & 0x01) { 228 word16_pos[j] = i * slot_width; 229 230 if (slot_width == 4) { 231 word16_pos[j + 1] = word16_pos[j] + 2; 232 j++; 233 } 234 j++; 235 236 if (j > 3) { 237 word_pos[k] = word16_pos[1] | 238 (word16_pos[0] << 8) | 239 (word16_pos[3] << 16) | 240 (word16_pos[2] << 24); 241 j = 0; 242 k++; 243 } 244 } 245 } 246 247 return 0; 248 } 249 250 /* 251 * sti_uniperiph_dai_create_ctrl 252 * This function is used to create Ctrl associated to DAI but also pcm device. 253 * Request is done by front end to associate ctrl with pcm device id 254 */ 255 static int sti_uniperiph_dai_create_ctrl(struct snd_soc_dai *dai) 256 { 257 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 258 struct uniperif *uni = priv->dai_data.uni; 259 struct snd_kcontrol_new *ctrl; 260 int i; 261 262 if (!uni->num_ctrls) 263 return 0; 264 265 for (i = 0; i < uni->num_ctrls; i++) { 266 /* 267 * Several Control can have same name. Controls are indexed on 268 * Uniperipheral instance ID 269 */ 270 ctrl = &uni->snd_ctrls[i]; 271 ctrl->index = uni->id; 272 ctrl->device = uni->id; 273 } 274 275 return snd_soc_add_dai_controls(dai, uni->snd_ctrls, uni->num_ctrls); 276 } 277 278 /* 279 * DAI 280 */ 281 int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream, 282 struct snd_pcm_hw_params *params, 283 struct snd_soc_dai *dai) 284 { 285 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 286 struct uniperif *uni = priv->dai_data.uni; 287 struct snd_dmaengine_dai_dma_data *dma_data; 288 int transfer_size; 289 290 if (uni->type == SND_ST_UNIPERIF_TYPE_TDM) 291 /* transfer size = user frame size (in 32-bits FIFO cell) */ 292 transfer_size = snd_soc_params_to_frame_size(params) / 32; 293 else 294 transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES; 295 296 dma_data = snd_soc_dai_get_dma_data(dai, substream); 297 dma_data->maxburst = transfer_size; 298 299 return 0; 300 } 301 302 int sti_uniperiph_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 303 { 304 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 305 306 priv->dai_data.uni->daifmt = fmt; 307 308 return 0; 309 } 310 311 static int sti_uniperiph_suspend(struct snd_soc_component *component) 312 { 313 struct sti_uniperiph_data *priv = snd_soc_component_get_drvdata(component); 314 struct uniperif *uni = priv->dai_data.uni; 315 int ret; 316 317 /* The uniperipheral should be in stopped state */ 318 if (uni->state != UNIPERIF_STATE_STOPPED) { 319 dev_err(uni->dev, "%s: invalid uni state( %d)\n", 320 __func__, (int)uni->state); 321 return -EBUSY; 322 } 323 324 /* Pinctrl: switch pinstate to sleep */ 325 ret = pinctrl_pm_select_sleep_state(uni->dev); 326 if (ret) 327 dev_err(uni->dev, "%s: failed to select pinctrl state\n", 328 __func__); 329 330 return ret; 331 } 332 333 static int sti_uniperiph_resume(struct snd_soc_component *component) 334 { 335 struct sti_uniperiph_data *priv = snd_soc_component_get_drvdata(component); 336 struct uniperif *uni = priv->dai_data.uni; 337 int ret; 338 339 if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK) { 340 ret = uni_player_resume(uni); 341 if (ret) 342 return ret; 343 } 344 345 /* pinctrl: switch pinstate to default */ 346 ret = pinctrl_pm_select_default_state(uni->dev); 347 if (ret) 348 dev_err(uni->dev, "%s: failed to select pinctrl state\n", 349 __func__); 350 351 return ret; 352 } 353 354 static int sti_uniperiph_dai_probe(struct snd_soc_dai *dai) 355 { 356 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai); 357 struct sti_uniperiph_dai *dai_data = &priv->dai_data; 358 359 /* DMA settings*/ 360 if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK) 361 snd_soc_dai_init_dma_data(dai, &dai_data->dma_data, NULL); 362 else 363 snd_soc_dai_init_dma_data(dai, NULL, &dai_data->dma_data); 364 365 dai_data->dma_data.addr = dai_data->uni->fifo_phys_address; 366 dai_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 367 368 return sti_uniperiph_dai_create_ctrl(dai); 369 } 370 371 static const struct snd_soc_dai_driver sti_uniperiph_dai_template = { 372 .probe = sti_uniperiph_dai_probe, 373 }; 374 375 static const struct snd_soc_component_driver sti_uniperiph_dai_component = { 376 .name = "sti_cpu_dai", 377 .suspend = sti_uniperiph_suspend, 378 .resume = sti_uniperiph_resume 379 }; 380 381 static int sti_uniperiph_cpu_dai_of(struct device_node *node, 382 struct sti_uniperiph_data *priv) 383 { 384 struct device *dev = &priv->pdev->dev; 385 struct sti_uniperiph_dai *dai_data = &priv->dai_data; 386 struct snd_soc_dai_driver *dai = priv->dai; 387 struct snd_soc_pcm_stream *stream; 388 struct uniperif *uni; 389 const struct of_device_id *of_id; 390 const struct sti_uniperiph_dev_data *dev_data; 391 const char *mode; 392 int ret; 393 394 /* Populate data structure depending on compatibility */ 395 of_id = of_match_node(snd_soc_sti_match, node); 396 if (!of_id->data) { 397 dev_err(dev, "data associated to device is missing\n"); 398 return -EINVAL; 399 } 400 dev_data = (struct sti_uniperiph_dev_data *)of_id->data; 401 402 uni = devm_kzalloc(dev, sizeof(*uni), GFP_KERNEL); 403 if (!uni) 404 return -ENOMEM; 405 406 uni->id = dev_data->id; 407 uni->ver = dev_data->version; 408 409 *dai = sti_uniperiph_dai_template; 410 dai->name = dev_data->dai_names; 411 412 /* Get resources */ 413 uni->mem_region = platform_get_resource(priv->pdev, IORESOURCE_MEM, 0); 414 415 if (!uni->mem_region) { 416 dev_err(dev, "Failed to get memory resource\n"); 417 return -ENODEV; 418 } 419 420 uni->base = devm_ioremap_resource(dev, uni->mem_region); 421 422 if (IS_ERR(uni->base)) 423 return PTR_ERR(uni->base); 424 425 uni->fifo_phys_address = uni->mem_region->start + 426 UNIPERIF_FIFO_DATA_OFFSET(uni); 427 428 uni->irq = platform_get_irq(priv->pdev, 0); 429 if (uni->irq < 0) 430 return -ENXIO; 431 432 uni->type = dev_data->type; 433 434 /* check if player should be configured for tdm */ 435 if (dev_data->type & SND_ST_UNIPERIF_TYPE_TDM) { 436 if (!of_property_read_string(node, "st,tdm-mode", &mode)) 437 uni->type = SND_ST_UNIPERIF_TYPE_TDM; 438 else 439 uni->type = SND_ST_UNIPERIF_TYPE_PCM; 440 } 441 442 dai_data->uni = uni; 443 dai_data->stream = dev_data->stream; 444 445 if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK) { 446 ret = uni_player_init(priv->pdev, uni); 447 stream = &dai->playback; 448 } else { 449 ret = uni_reader_init(priv->pdev, uni); 450 stream = &dai->capture; 451 } 452 if (ret < 0) 453 return ret; 454 455 dai->ops = uni->dai_ops; 456 457 stream->stream_name = dai->name; 458 stream->channels_min = uni->hw->channels_min; 459 stream->channels_max = uni->hw->channels_max; 460 stream->rates = uni->hw->rates; 461 stream->formats = uni->hw->formats; 462 463 return 0; 464 } 465 466 static const struct snd_dmaengine_pcm_config dmaengine_pcm_config = { 467 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 468 }; 469 470 static int sti_uniperiph_probe(struct platform_device *pdev) 471 { 472 struct sti_uniperiph_data *priv; 473 struct device_node *node = pdev->dev.of_node; 474 int ret; 475 476 /* Allocate the private data and the CPU_DAI array */ 477 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 478 if (!priv) 479 return -ENOMEM; 480 priv->dai = devm_kzalloc(&pdev->dev, sizeof(*priv->dai), GFP_KERNEL); 481 if (!priv->dai) 482 return -ENOMEM; 483 484 priv->pdev = pdev; 485 486 ret = sti_uniperiph_cpu_dai_of(node, priv); 487 488 dev_set_drvdata(&pdev->dev, priv); 489 490 ret = devm_snd_soc_register_component(&pdev->dev, 491 &sti_uniperiph_dai_component, 492 priv->dai, 1); 493 if (ret < 0) 494 return ret; 495 496 return devm_snd_dmaengine_pcm_register(&pdev->dev, 497 &dmaengine_pcm_config, 0); 498 } 499 500 static struct platform_driver sti_uniperiph_driver = { 501 .driver = { 502 .name = "sti-uniperiph-dai", 503 .of_match_table = snd_soc_sti_match, 504 }, 505 .probe = sti_uniperiph_probe, 506 }; 507 module_platform_driver(sti_uniperiph_driver); 508 509 MODULE_DESCRIPTION("uniperipheral DAI driver"); 510 MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>"); 511 MODULE_LICENSE("GPL v2"); 512