1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2021 Advanced Micro Devices, Inc. 7 // 8 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> 9 10 /* 11 * Generic interface for ACP audio blck PCM component 12 */ 13 14 #include <linux/platform_device.h> 15 #include <linux/module.h> 16 #include <linux/err.h> 17 #include <linux/io.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include <sound/soc-dai.h> 21 #include <linux/dma-mapping.h> 22 23 #include "amd.h" 24 #include "../mach-config.h" 25 #include "acp-mach.h" 26 27 #define DRV_NAME "acp_i2s_dma" 28 29 static const struct snd_pcm_hardware acp_pcm_hardware_playback = { 30 .info = SNDRV_PCM_INFO_INTERLEAVED | 31 SNDRV_PCM_INFO_BLOCK_TRANSFER | 32 SNDRV_PCM_INFO_BATCH | 33 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 34 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 35 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 36 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 37 SNDRV_PCM_FMTBIT_S32_LE, 38 .channels_min = 2, 39 .channels_max = 8, 40 .rates = SNDRV_PCM_RATE_8000_96000, 41 .rate_min = 8000, 42 .rate_max = 96000, 43 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, 44 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, 45 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, 46 .periods_min = PLAYBACK_MIN_NUM_PERIODS, 47 .periods_max = PLAYBACK_MAX_NUM_PERIODS, 48 }; 49 50 static const struct snd_pcm_hardware acp_pcm_hardware_capture = { 51 .info = SNDRV_PCM_INFO_INTERLEAVED | 52 SNDRV_PCM_INFO_BLOCK_TRANSFER | 53 SNDRV_PCM_INFO_BATCH | 54 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 55 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 56 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 57 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 58 SNDRV_PCM_FMTBIT_S32_LE, 59 .channels_min = 2, 60 .channels_max = 2, 61 .rates = SNDRV_PCM_RATE_8000_48000, 62 .rate_min = 8000, 63 .rate_max = 48000, 64 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 65 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 66 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 67 .periods_min = CAPTURE_MIN_NUM_PERIODS, 68 .periods_max = CAPTURE_MAX_NUM_PERIODS, 69 }; 70 71 static const struct snd_pcm_hardware acp6x_pcm_hardware_playback = { 72 .info = SNDRV_PCM_INFO_INTERLEAVED | 73 SNDRV_PCM_INFO_BLOCK_TRANSFER | 74 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 75 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 76 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 77 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 78 SNDRV_PCM_FMTBIT_S32_LE, 79 .channels_min = 2, 80 .channels_max = 32, 81 .rates = SNDRV_PCM_RATE_8000_192000, 82 .rate_min = 8000, 83 .rate_max = 192000, 84 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, 85 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, 86 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, 87 .periods_min = PLAYBACK_MIN_NUM_PERIODS, 88 .periods_max = PLAYBACK_MAX_NUM_PERIODS, 89 }; 90 91 static const struct snd_pcm_hardware acp6x_pcm_hardware_capture = { 92 .info = SNDRV_PCM_INFO_INTERLEAVED | 93 SNDRV_PCM_INFO_BLOCK_TRANSFER | 94 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 95 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 96 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 97 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 98 SNDRV_PCM_FMTBIT_S32_LE, 99 .channels_min = 2, 100 .channels_max = 32, 101 .rates = SNDRV_PCM_RATE_8000_192000, 102 .rate_min = 8000, 103 .rate_max = 192000, 104 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 105 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 106 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 107 .periods_min = CAPTURE_MIN_NUM_PERIODS, 108 .periods_max = CAPTURE_MAX_NUM_PERIODS, 109 }; 110 111 int acp_machine_select(struct acp_dev_data *adata) 112 { 113 struct snd_soc_acpi_mach *mach; 114 int size, platform; 115 116 if (adata->flag == FLAG_AMD_LEGACY_ONLY_DMIC) { 117 platform = adata->platform; 118 adata->mach_dev = platform_device_register_data(adata->dev, "acp-pdm-mach", 119 PLATFORM_DEVID_NONE, &platform, 120 sizeof(platform)); 121 } else { 122 size = sizeof(*adata->machines); 123 mach = snd_soc_acpi_find_machine(adata->machines); 124 if (!mach) { 125 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n"); 126 return -EINVAL; 127 } 128 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name, 129 PLATFORM_DEVID_NONE, mach, size); 130 } 131 if (IS_ERR(adata->mach_dev)) 132 dev_warn(adata->dev, "Unable to register Machine device\n"); 133 return 0; 134 } 135 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON); 136 137 static irqreturn_t i2s_irq_handler(int irq, void *data) 138 { 139 struct acp_dev_data *adata = data; 140 struct acp_resource *rsrc = adata->rsrc; 141 struct acp_stream *stream; 142 u16 i2s_flag = 0; 143 u32 ext_intr_stat, ext_intr_stat1; 144 145 if (!adata) 146 return IRQ_NONE; 147 148 if (adata->rsrc->no_of_ctrls == 2) 149 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1))); 150 151 ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 152 153 spin_lock(&adata->acp_lock); 154 list_for_each_entry(stream, &adata->stream_list, list) { 155 if (ext_intr_stat & stream->irq_bit) { 156 writel(stream->irq_bit, 157 ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 158 snd_pcm_period_elapsed(stream->substream); 159 i2s_flag = 1; 160 } 161 if (adata->rsrc->no_of_ctrls == 2) { 162 if (ext_intr_stat1 & stream->irq_bit) { 163 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata, 164 (rsrc->irqp_used - 1))); 165 snd_pcm_period_elapsed(stream->substream); 166 i2s_flag = 1; 167 } 168 } 169 } 170 spin_unlock(&adata->acp_lock); 171 if (i2s_flag) 172 return IRQ_HANDLED; 173 174 return IRQ_NONE; 175 } 176 177 void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream) 178 { 179 struct acp_resource *rsrc = adata->rsrc; 180 u32 reg_val; 181 182 reg_val = rsrc->sram_pte_offset; 183 stream->reg_offset = 0x02000000; 184 185 writel((reg_val + GRP1_OFFSET) | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_1); 186 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1); 187 188 writel((reg_val + GRP2_OFFSET) | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_2); 189 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_2); 190 191 writel(reg_val | BIT(31), adata->acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_5); 192 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5); 193 194 writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL); 195 } 196 EXPORT_SYMBOL_NS_GPL(config_pte_for_stream, SND_SOC_ACP_COMMON); 197 198 void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size) 199 { 200 struct snd_pcm_substream *substream = stream->substream; 201 struct acp_resource *rsrc = adata->rsrc; 202 dma_addr_t addr = substream->dma_buffer.addr; 203 int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); 204 u32 low, high, val; 205 u16 page_idx; 206 207 switch (adata->platform) { 208 case ACP70: 209 case ACP71: 210 switch (stream->dai_id) { 211 case I2S_SP_INSTANCE: 212 if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK) 213 val = 0x0; 214 else 215 val = 0x1000; 216 break; 217 case I2S_BT_INSTANCE: 218 if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK) 219 val = 0x2000; 220 else 221 val = 0x3000; 222 break; 223 case I2S_HS_INSTANCE: 224 if (stream->dir == SNDRV_PCM_STREAM_PLAYBACK) 225 val = 0x4000; 226 else 227 val = 0x5000; 228 break; 229 case DMIC_INSTANCE: 230 val = 0x6000; 231 break; 232 default: 233 dev_err(adata->dev, "Invalid dai id %x\n", stream->dai_id); 234 return; 235 } 236 break; 237 default: 238 val = stream->pte_offset; 239 break; 240 } 241 242 for (page_idx = 0; page_idx < num_pages; page_idx++) { 243 /* Load the low address of page int ACP SRAM through SRBM */ 244 low = lower_32_bits(addr); 245 high = upper_32_bits(addr); 246 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val); 247 high |= BIT(31); 248 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4); 249 250 /* Move to next physically contiguous page */ 251 val += 8; 252 addr += PAGE_SIZE; 253 } 254 } 255 EXPORT_SYMBOL_NS_GPL(config_acp_dma, SND_SOC_ACP_COMMON); 256 257 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) 258 { 259 struct snd_pcm_runtime *runtime = substream->runtime; 260 struct device *dev = component->dev; 261 struct acp_dev_data *adata = dev_get_drvdata(dev); 262 struct acp_chip_info *chip; 263 struct acp_stream *stream; 264 int ret; 265 266 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 267 if (!stream) 268 return -ENOMEM; 269 270 stream->substream = substream; 271 chip = dev_get_platdata(dev); 272 switch (chip->acp_rev) { 273 case ACP63_DEV: 274 case ACP70_DEV: 275 case ACP71_DEV: 276 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 277 runtime->hw = acp6x_pcm_hardware_playback; 278 else 279 runtime->hw = acp6x_pcm_hardware_capture; 280 break; 281 default: 282 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 283 runtime->hw = acp_pcm_hardware_playback; 284 else 285 runtime->hw = acp_pcm_hardware_capture; 286 break; 287 } 288 289 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE); 290 if (ret) { 291 dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n"); 292 kfree(stream); 293 return ret; 294 } 295 296 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE); 297 if (ret) { 298 dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n"); 299 kfree(stream); 300 return ret; 301 } 302 303 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 304 if (ret < 0) { 305 dev_err(component->dev, "set integer constraint failed\n"); 306 kfree(stream); 307 return ret; 308 } 309 runtime->private_data = stream; 310 311 writel(1, ACP_EXTERNAL_INTR_ENB(adata)); 312 313 spin_lock_irq(&adata->acp_lock); 314 list_add_tail(&stream->list, &adata->stream_list); 315 spin_unlock_irq(&adata->acp_lock); 316 317 return ret; 318 } 319 320 static int acp_dma_hw_params(struct snd_soc_component *component, 321 struct snd_pcm_substream *substream, 322 struct snd_pcm_hw_params *params) 323 { 324 struct acp_dev_data *adata = snd_soc_component_get_drvdata(component); 325 struct acp_stream *stream = substream->runtime->private_data; 326 u64 size = params_buffer_bytes(params); 327 328 /* Configure ACP DMA block with params */ 329 config_pte_for_stream(adata, stream); 330 config_acp_dma(adata, stream, size); 331 332 return 0; 333 } 334 335 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component, 336 struct snd_pcm_substream *substream) 337 { 338 struct device *dev = component->dev; 339 struct acp_dev_data *adata = dev_get_drvdata(dev); 340 struct acp_stream *stream = substream->runtime->private_data; 341 u32 pos, buffersize; 342 u64 bytescount; 343 344 buffersize = frames_to_bytes(substream->runtime, 345 substream->runtime->buffer_size); 346 347 bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); 348 349 if (bytescount > stream->bytescount) 350 bytescount -= stream->bytescount; 351 352 pos = do_div(bytescount, buffersize); 353 354 return bytes_to_frames(substream->runtime, pos); 355 } 356 357 static int acp_dma_new(struct snd_soc_component *component, 358 struct snd_soc_pcm_runtime *rtd) 359 { 360 struct device *parent = component->dev->parent; 361 362 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, 363 parent, MIN_BUFFER, MAX_BUFFER); 364 return 0; 365 } 366 367 static int acp_dma_close(struct snd_soc_component *component, 368 struct snd_pcm_substream *substream) 369 { 370 struct device *dev = component->dev; 371 struct acp_dev_data *adata = dev_get_drvdata(dev); 372 struct acp_stream *stream = substream->runtime->private_data; 373 374 /* Remove entry from list */ 375 spin_lock_irq(&adata->acp_lock); 376 list_del(&stream->list); 377 spin_unlock_irq(&adata->acp_lock); 378 kfree(stream); 379 380 return 0; 381 } 382 383 static const struct snd_soc_component_driver acp_pcm_component = { 384 .name = DRV_NAME, 385 .open = acp_dma_open, 386 .close = acp_dma_close, 387 .hw_params = acp_dma_hw_params, 388 .pointer = acp_dma_pointer, 389 .pcm_construct = acp_dma_new, 390 .legacy_dai_naming = 1, 391 }; 392 393 int acp_platform_register(struct device *dev) 394 { 395 struct acp_dev_data *adata = dev_get_drvdata(dev); 396 struct snd_soc_dai_driver; 397 unsigned int status; 398 399 status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler, 400 IRQF_SHARED, "ACP_I2S_IRQ", adata); 401 if (status) { 402 dev_err(dev, "ACP I2S IRQ request failed\n"); 403 return status; 404 } 405 406 status = devm_snd_soc_register_component(dev, &acp_pcm_component, 407 adata->dai_driver, 408 adata->num_dai); 409 if (status) { 410 dev_err(dev, "Fail to register acp i2s component\n"); 411 return status; 412 } 413 414 INIT_LIST_HEAD(&adata->stream_list); 415 spin_lock_init(&adata->acp_lock); 416 417 return 0; 418 } 419 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON); 420 421 int acp_platform_unregister(struct device *dev) 422 { 423 struct acp_dev_data *adata = dev_get_drvdata(dev); 424 425 if (adata->mach_dev) 426 platform_device_unregister(adata->mach_dev); 427 return 0; 428 } 429 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON); 430 431 MODULE_DESCRIPTION("AMD ACP PCM Driver"); 432 MODULE_LICENSE("Dual BSD/GPL"); 433 MODULE_ALIAS(DRV_NAME); 434