sound/soc/amd/ps/ps-sdw-dma.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * AMD ALSA SoC Pink Sardine SoundWire DMA Driver
   4  *
   5  * Copyright 2023 Advanced Micro Devices, Inc.
   6  */
   7
   8 #include <linux/err.h>
   9 #include <linux/io.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <sound/pcm_params.h>
  13 #include <sound/soc.h>
  14 #include <sound/soc-dai.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/soundwire/sdw_amd.h>
  17 #include "acp63.h"
  18
  19 #define DRV_NAME "amd_ps_sdw_dma"
  20
  21 static struct sdw_dma_ring_buf_reg sdw0_dma_ring_buf_reg[ACP63_SDW0_DMA_MAX_STREAMS] = {
  22         {ACP_AUDIO0_TX_DMA_SIZE, ACP_AUDIO0_TX_FIFOADDR, ACP_AUDIO0_TX_FIFOSIZE,
  23          ACP_AUDIO0_TX_RINGBUFSIZE, ACP_AUDIO0_TX_RINGBUFADDR, ACP_AUDIO0_TX_INTR_WATERMARK_SIZE,
  24          ACP_AUDIO0_TX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO0_TX_LINEARPOSITIONCNTR_HIGH},
  25         {ACP_AUDIO1_TX_DMA_SIZE, ACP_AUDIO1_TX_FIFOADDR, ACP_AUDIO1_TX_FIFOSIZE,
  26          ACP_AUDIO1_TX_RINGBUFSIZE, ACP_AUDIO1_TX_RINGBUFADDR, ACP_AUDIO1_TX_INTR_WATERMARK_SIZE,
  27          ACP_AUDIO1_TX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO1_TX_LINEARPOSITIONCNTR_HIGH},
  28         {ACP_AUDIO2_TX_DMA_SIZE, ACP_AUDIO2_TX_FIFOADDR, ACP_AUDIO2_TX_FIFOSIZE,
  29          ACP_AUDIO2_TX_RINGBUFSIZE, ACP_AUDIO2_TX_RINGBUFADDR, ACP_AUDIO2_TX_INTR_WATERMARK_SIZE,
  30          ACP_AUDIO2_TX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO2_TX_LINEARPOSITIONCNTR_HIGH},
  31         {ACP_AUDIO0_RX_DMA_SIZE, ACP_AUDIO0_RX_FIFOADDR, ACP_AUDIO0_RX_FIFOSIZE,
  32          ACP_AUDIO0_RX_RINGBUFSIZE, ACP_AUDIO0_RX_RINGBUFADDR, ACP_AUDIO0_RX_INTR_WATERMARK_SIZE,
  33          ACP_AUDIO0_RX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO0_RX_LINEARPOSITIONCNTR_HIGH},
  34         {ACP_AUDIO1_RX_DMA_SIZE, ACP_AUDIO1_RX_FIFOADDR, ACP_AUDIO1_RX_FIFOSIZE,
  35          ACP_AUDIO1_RX_RINGBUFSIZE, ACP_AUDIO1_RX_RINGBUFADDR, ACP_AUDIO1_RX_INTR_WATERMARK_SIZE,
  36          ACP_AUDIO1_RX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO1_RX_LINEARPOSITIONCNTR_HIGH},
  37         {ACP_AUDIO2_RX_DMA_SIZE, ACP_AUDIO2_RX_FIFOADDR, ACP_AUDIO2_RX_FIFOSIZE,
  38          ACP_AUDIO2_RX_RINGBUFSIZE, ACP_AUDIO2_RX_RINGBUFADDR, ACP_AUDIO2_RX_INTR_WATERMARK_SIZE,
  39          ACP_AUDIO2_RX_LINEARPOSITIONCNTR_LOW, ACP_AUDIO2_RX_LINEARPOSITIONCNTR_HIGH}
  40 };
  41
  42 /*
  43  * SDW1 instance supports one TX stream and one RX stream.
  44  * For TX/RX streams DMA registers programming for SDW1 instance, it uses ACP_P1_AUDIO1 register
  45  * set as per hardware register documentation
  46  */
  47 static struct sdw_dma_ring_buf_reg sdw1_dma_ring_buf_reg[ACP63_SDW1_DMA_MAX_STREAMS] =  {
  48         {ACP_P1_AUDIO1_TX_DMA_SIZE, ACP_P1_AUDIO1_TX_FIFOADDR, ACP_P1_AUDIO1_TX_FIFOSIZE,
  49          ACP_P1_AUDIO1_TX_RINGBUFSIZE, ACP_P1_AUDIO1_TX_RINGBUFADDR,
  50          ACP_P1_AUDIO1_TX_INTR_WATERMARK_SIZE,
  51          ACP_P1_AUDIO1_TX_LINEARPOSITIONCNTR_LOW, ACP_P1_AUDIO1_TX_LINEARPOSITIONCNTR_HIGH},
  52         {ACP_P1_AUDIO1_RX_DMA_SIZE, ACP_P1_AUDIO1_RX_FIFOADDR, ACP_P1_AUDIO1_RX_FIFOSIZE,
  53          ACP_P1_AUDIO1_RX_RINGBUFSIZE, ACP_P1_AUDIO1_RX_RINGBUFADDR,
  54          ACP_P1_AUDIO1_RX_INTR_WATERMARK_SIZE,
  55          ACP_P1_AUDIO1_RX_LINEARPOSITIONCNTR_LOW, ACP_P1_AUDIO1_RX_LINEARPOSITIONCNTR_HIGH},
  56 };
  57
  58 static u32 sdw0_dma_enable_reg[ACP63_SDW0_DMA_MAX_STREAMS] = {
  59         ACP_SW0_AUDIO0_TX_EN,
  60         ACP_SW0_AUDIO1_TX_EN,
  61         ACP_SW0_AUDIO2_TX_EN,
  62         ACP_SW0_AUDIO0_RX_EN,
  63         ACP_SW0_AUDIO1_RX_EN,
  64         ACP_SW0_AUDIO2_RX_EN,
  65 };
  66
  67 /*
  68  * SDW1 instance supports one TX stream and one RX stream.
  69  * For TX/RX streams DMA enable register programming for SDW1 instance,
  70  * it uses ACP_SW1_AUDIO1_TX_EN and ACP_SW1_AUDIO1_RX_EN registers
  71  * as per hardware register documentation.
  72  */
  73 static u32 sdw1_dma_enable_reg[ACP63_SDW1_DMA_MAX_STREAMS] = {
  74         ACP_SW1_AUDIO1_TX_EN,
  75         ACP_SW1_AUDIO1_RX_EN,
  76 };
  77
  78 static const struct snd_pcm_hardware acp63_sdw_hardware_playback = {
  79         .info = SNDRV_PCM_INFO_INTERLEAVED |
  80                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  81                 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
  82                 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
  83         .formats = SNDRV_PCM_FMTBIT_S16_LE |  SNDRV_PCM_FMTBIT_S8 |
  84                    SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
  85         .channels_min = 2,
  86         .channels_max = 2,
  87         .rates = SNDRV_PCM_RATE_48000,
  88         .rate_min = 48000,
  89         .rate_max = 48000,
  90         .buffer_bytes_max = SDW_PLAYBACK_MAX_NUM_PERIODS * SDW_PLAYBACK_MAX_PERIOD_SIZE,
  91         .period_bytes_min = SDW_PLAYBACK_MIN_PERIOD_SIZE,
  92         .period_bytes_max = SDW_PLAYBACK_MAX_PERIOD_SIZE,
  93         .periods_min = SDW_PLAYBACK_MIN_NUM_PERIODS,
  94         .periods_max = SDW_PLAYBACK_MAX_NUM_PERIODS,
  95 };
  96
  97 static const struct snd_pcm_hardware acp63_sdw_hardware_capture = {
  98         .info = SNDRV_PCM_INFO_INTERLEAVED |
  99                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 100                 SNDRV_PCM_INFO_MMAP |
 101                 SNDRV_PCM_INFO_MMAP_VALID |
 102                 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
 103         .formats = SNDRV_PCM_FMTBIT_S16_LE |  SNDRV_PCM_FMTBIT_S8 |
 104                    SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
 105         .channels_min = 2,
 106         .channels_max = 2,
 107         .rates = SNDRV_PCM_RATE_48000,
 108         .rate_min = 48000,
 109         .rate_max = 48000,
 110         .buffer_bytes_max = SDW_CAPTURE_MAX_NUM_PERIODS * SDW_CAPTURE_MAX_PERIOD_SIZE,
 111         .period_bytes_min = SDW_CAPTURE_MIN_PERIOD_SIZE,
 112         .period_bytes_max = SDW_CAPTURE_MAX_PERIOD_SIZE,
 113         .periods_min = SDW_CAPTURE_MIN_NUM_PERIODS,
 114         .periods_max = SDW_CAPTURE_MAX_NUM_PERIODS,
 115 };
 116
 117 static void acp63_enable_disable_sdw_dma_interrupts(void __iomem *acp_base, bool enable)
 118 {
 119         u32 ext_intr_cntl, ext_intr_cntl1;
 120         u32 irq_mask = ACP_SDW_DMA_IRQ_MASK;
 121         u32 irq_mask1 = ACP_P1_SDW_DMA_IRQ_MASK;
 122
 123         if (enable) {
 124                 ext_intr_cntl = readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
 125                 ext_intr_cntl |= irq_mask;
 126                 writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
 127                 ext_intr_cntl1 = readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
 128                 ext_intr_cntl1 |= irq_mask1;
 129                 writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
 130         } else {
 131                 ext_intr_cntl = readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
 132                 ext_intr_cntl &= ~irq_mask;
 133                 writel(ext_intr_cntl, acp_base + ACP_EXTERNAL_INTR_CNTL);
 134                 ext_intr_cntl1 = readl(acp_base + ACP_EXTERNAL_INTR_CNTL1);
 135                 ext_intr_cntl1 &= ~irq_mask1;
 136                 writel(ext_intr_cntl1, acp_base + ACP_EXTERNAL_INTR_CNTL1);
 137         }
 138 }
 139
 140 static void acp63_config_dma(struct acp_sdw_dma_stream *stream, void __iomem *acp_base,
 141                              u32 stream_id)
 142 {
 143         u16 page_idx;
 144         u32 low, high, val;
 145         u32 sdw_dma_pte_offset;
 146         dma_addr_t addr;
 147
 148         addr = stream->dma_addr;
 149         sdw_dma_pte_offset = SDW_PTE_OFFSET(stream->instance);
 150         val = sdw_dma_pte_offset + (stream_id * ACP_SDW_PTE_OFFSET);
 151
 152         /* Group Enable */
 153         writel(ACP_SDW_SRAM_PTE_OFFSET | BIT(31), acp_base + ACPAXI2AXI_ATU_BASE_ADDR_GRP_2);
 154         writel(PAGE_SIZE_4K_ENABLE, acp_base + ACPAXI2AXI_ATU_PAGE_SIZE_GRP_2);
 155         for (page_idx = 0; page_idx < stream->num_pages; page_idx++) {
 156                 /* Load the low address of page int ACP SRAM through SRBM */
 157                 low = lower_32_bits(addr);
 158                 high = upper_32_bits(addr);
 159
 160                 writel(low, acp_base + ACP_SCRATCH_REG_0 + val);
 161                 high |= BIT(31);
 162                 writel(high, acp_base + ACP_SCRATCH_REG_0 + val + 4);
 163                 val += 8;
 164                 addr += PAGE_SIZE;
 165         }
 166         writel(0x1, acp_base + ACPAXI2AXI_ATU_CTRL);
 167 }
 168
 169 static int acp63_configure_sdw_ringbuffer(void __iomem *acp_base, u32 stream_id, u32 size,
 170                                           u32 manager_instance)
 171 {
 172         u32 reg_dma_size;
 173         u32 reg_fifo_addr;
 174         u32 reg_fifo_size;
 175         u32 reg_ring_buf_size;
 176         u32 reg_ring_buf_addr;
 177         u32 sdw_fifo_addr;
 178         u32 sdw_fifo_offset;
 179         u32 sdw_ring_buf_addr;
 180         u32 sdw_ring_buf_size;
 181         u32 sdw_mem_window_offset;
 182
 183         switch (manager_instance) {
 184         case ACP_SDW0:
 185                 reg_dma_size = sdw0_dma_ring_buf_reg[stream_id].reg_dma_size;
 186                 reg_fifo_addr = sdw0_dma_ring_buf_reg[stream_id].reg_fifo_addr;
 187                 reg_fifo_size = sdw0_dma_ring_buf_reg[stream_id].reg_fifo_size;
 188                 reg_ring_buf_size = sdw0_dma_ring_buf_reg[stream_id].reg_ring_buf_size;
 189                 reg_ring_buf_addr = sdw0_dma_ring_buf_reg[stream_id].reg_ring_buf_addr;
 190                 break;
 191         case ACP_SDW1:
 192                 reg_dma_size = sdw1_dma_ring_buf_reg[stream_id].reg_dma_size;
 193                 reg_fifo_addr = sdw1_dma_ring_buf_reg[stream_id].reg_fifo_addr;
 194                 reg_fifo_size = sdw1_dma_ring_buf_reg[stream_id].reg_fifo_size;
 195                 reg_ring_buf_size = sdw1_dma_ring_buf_reg[stream_id].reg_ring_buf_size;
 196                 reg_ring_buf_addr = sdw1_dma_ring_buf_reg[stream_id].reg_ring_buf_addr;
 197                 break;
 198         default:
 199                 return -EINVAL;
 200         }
 201         sdw_fifo_offset = ACP_SDW_FIFO_OFFSET(manager_instance);
 202         sdw_mem_window_offset = SDW_MEM_WINDOW_START(manager_instance);
 203         sdw_fifo_addr = sdw_fifo_offset + (stream_id * SDW_FIFO_OFFSET);
 204         sdw_ring_buf_addr = sdw_mem_window_offset + (stream_id * ACP_SDW_RING_BUFF_ADDR_OFFSET);
 205         sdw_ring_buf_size = size;
 206         writel(sdw_ring_buf_size, acp_base + reg_ring_buf_size);
 207         writel(sdw_ring_buf_addr, acp_base + reg_ring_buf_addr);
 208         writel(sdw_fifo_addr, acp_base + reg_fifo_addr);
 209         writel(SDW_DMA_SIZE, acp_base + reg_dma_size);
 210         writel(SDW_FIFO_SIZE, acp_base + reg_fifo_size);
 211         return 0;
 212 }
 213
 214 static int acp63_sdw_dma_open(struct snd_soc_component *component,
 215                               struct snd_pcm_substream *substream)
 216 {
 217         struct snd_pcm_runtime *runtime;
 218         struct acp_sdw_dma_stream *stream;
 219         struct snd_soc_dai *cpu_dai;
 220         struct amd_sdw_manager *amd_manager;
 221         struct snd_soc_pcm_runtime *prtd = snd_soc_substream_to_rtd(substream);
 222         int ret;
 223
 224         runtime = substream->runtime;
 225         cpu_dai = snd_soc_rtd_to_cpu(prtd, 0);
 226         amd_manager = snd_soc_dai_get_drvdata(cpu_dai);
 227         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 228         if (!stream)
 229                 return -ENOMEM;
 230
 231         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 232                 runtime->hw = acp63_sdw_hardware_playback;
 233         else
 234                 runtime->hw = acp63_sdw_hardware_capture;
 235         ret = snd_pcm_hw_constraint_integer(runtime,
 236                                             SNDRV_PCM_HW_PARAM_PERIODS);
 237         if (ret < 0) {
 238                 dev_err(component->dev, "set integer constraint failed\n");
 239                 kfree(stream);
 240                 return ret;
 241         }
 242
 243         stream->stream_id = cpu_dai->id;
 244         stream->instance = amd_manager->instance;
 245         runtime->private_data = stream;
 246         return ret;
 247 }
 248
 249 static int acp63_sdw_dma_hw_params(struct snd_soc_component *component,
 250                                    struct snd_pcm_substream *substream,
 251                                    struct snd_pcm_hw_params *params)
 252 {
 253         struct acp_sdw_dma_stream *stream;
 254         struct sdw_dma_dev_data *sdw_data;
 255         u32 period_bytes;
 256         u32 water_mark_size_reg;
 257         u32 irq_mask, ext_intr_ctrl;
 258         u64 size;
 259         u32 stream_id;
 260         u32 acp_ext_intr_cntl_reg;
 261         int ret;
 262
 263         sdw_data = dev_get_drvdata(component->dev);
 264         stream = substream->runtime->private_data;
 265         if (!stream)
 266                 return -EINVAL;
 267         stream_id = stream->stream_id;
 268         switch (stream->instance) {
 269         case ACP_SDW0:
 270                 sdw_data->sdw0_dma_stream[stream_id] = substream;
 271                 water_mark_size_reg = sdw0_dma_ring_buf_reg[stream_id].water_mark_size_reg;
 272                 acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL;
 273                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 274                         irq_mask = BIT(SDW0_DMA_TX_IRQ_MASK(stream_id));
 275                 else
 276                         irq_mask = BIT(SDW0_DMA_RX_IRQ_MASK(stream_id));
 277                 break;
 278         case ACP_SDW1:
 279                 sdw_data->sdw1_dma_stream[stream_id] = substream;
 280                 acp_ext_intr_cntl_reg = ACP_EXTERNAL_INTR_CNTL1;
 281                 water_mark_size_reg = sdw1_dma_ring_buf_reg[stream_id].water_mark_size_reg;
 282                 irq_mask = BIT(SDW1_DMA_IRQ_MASK(stream_id));
 283                 break;
 284         default:
 285                 return -EINVAL;
 286         }
 287         size = params_buffer_bytes(params);
 288         period_bytes = params_period_bytes(params);
 289         stream->dma_addr = substream->runtime->dma_addr;
 290         stream->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
 291         acp63_config_dma(stream, sdw_data->acp_base, stream_id);
 292         ret = acp63_configure_sdw_ringbuffer(sdw_data->acp_base, stream_id, size,
 293                                              stream->instance);
 294         if (ret) {
 295                 dev_err(component->dev, "Invalid DMA channel\n");
 296                 return -EINVAL;
 297         }
 298         ext_intr_ctrl = readl(sdw_data->acp_base + acp_ext_intr_cntl_reg);
 299         ext_intr_ctrl |= irq_mask;
 300         writel(ext_intr_ctrl, sdw_data->acp_base + acp_ext_intr_cntl_reg);
 301         writel(period_bytes, sdw_data->acp_base + water_mark_size_reg);
 302         return 0;
 303 }
 304
 305 static u64 acp63_sdw_get_byte_count(struct acp_sdw_dma_stream *stream, void __iomem *acp_base)
 306 {
 307         union acp_sdw_dma_count byte_count;
 308         u32 pos_low_reg, pos_high_reg;
 309
 310         byte_count.bytescount = 0;
 311         switch (stream->instance) {
 312         case ACP_SDW0:
 313                 pos_low_reg = sdw0_dma_ring_buf_reg[stream->stream_id].pos_low_reg;
 314                 pos_high_reg = sdw0_dma_ring_buf_reg[stream->stream_id].pos_high_reg;
 315                 break;
 316         case ACP_SDW1:
 317                 pos_low_reg = sdw1_dma_ring_buf_reg[stream->stream_id].pos_low_reg;
 318                 pos_high_reg = sdw1_dma_ring_buf_reg[stream->stream_id].pos_high_reg;
 319                 break;
 320         default:
 321                 goto POINTER_RETURN_BYTES;
 322         }
 323         if (pos_low_reg) {
 324                 byte_count.bcount.high = readl(acp_base + pos_high_reg);
 325                 byte_count.bcount.low = readl(acp_base + pos_low_reg);
 326         }
 327 POINTER_RETURN_BYTES:
 328         return byte_count.bytescount;
 329 }
 330
 331 static snd_pcm_uframes_t acp63_sdw_dma_pointer(struct snd_soc_component *comp,
 332                                                struct snd_pcm_substream *substream)
 333 {
 334         struct sdw_dma_dev_data *sdw_data;
 335         struct acp_sdw_dma_stream *stream;
 336         u32 pos, buffersize;
 337         u64 bytescount;
 338
 339         sdw_data = dev_get_drvdata(comp->dev);
 340         stream = substream->runtime->private_data;
 341         buffersize = frames_to_bytes(substream->runtime,
 342                                      substream->runtime->buffer_size);
 343         bytescount = acp63_sdw_get_byte_count(stream, sdw_data->acp_base);
 344         if (bytescount > stream->bytescount)
 345                 bytescount -= stream->bytescount;
 346         pos = do_div(bytescount, buffersize);
 347         return bytes_to_frames(substream->runtime, pos);
 348 }
 349
 350 static int acp63_sdw_dma_new(struct snd_soc_component *component,
 351                              struct snd_soc_pcm_runtime *rtd)
 352 {
 353         struct device *parent = component->dev->parent;
 354
 355         snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
 356                                        parent, SDW_MIN_BUFFER, SDW_MAX_BUFFER);
 357         return 0;
 358 }
 359
 360 static int acp63_sdw_dma_close(struct snd_soc_component *component,
 361                                struct snd_pcm_substream *substream)
 362 {
 363         struct sdw_dma_dev_data *sdw_data;
 364         struct acp_sdw_dma_stream *stream;
 365
 366         sdw_data = dev_get_drvdata(component->dev);
 367         stream = substream->runtime->private_data;
 368         if (!stream)
 369                 return -EINVAL;
 370         switch (stream->instance) {
 371         case ACP_SDW0:
 372                 sdw_data->sdw0_dma_stream[stream->stream_id] = NULL;
 373                 break;
 374         case ACP_SDW1:
 375                 sdw_data->sdw1_dma_stream[stream->stream_id] = NULL;
 376                 break;
 377         default:
 378                 return -EINVAL;
 379         }
 380         kfree(stream);
 381         return 0;
 382 }
 383
 384 static int acp63_sdw_dma_enable(struct snd_pcm_substream *substream,
 385                                 void __iomem *acp_base, bool sdw_dma_enable)
 386 {
 387         struct acp_sdw_dma_stream *stream;
 388         u32 stream_id;
 389         u32 sdw_dma_en_reg;
 390         u32 sdw_dma_en_stat_reg;
 391         u32 sdw_dma_stat;
 392         u32 dma_enable;
 393
 394         stream = substream->runtime->private_data;
 395         stream_id = stream->stream_id;
 396         switch (stream->instance) {
 397         case ACP_SDW0:
 398                 sdw_dma_en_reg = sdw0_dma_enable_reg[stream_id];
 399                 break;
 400         case ACP_SDW1:
 401                 sdw_dma_en_reg = sdw1_dma_enable_reg[stream_id];
 402                 break;
 403         default:
 404                 return -EINVAL;
 405         }
 406         sdw_dma_en_stat_reg = sdw_dma_en_reg + 4;
 407         dma_enable = sdw_dma_enable;
 408         writel(dma_enable, acp_base + sdw_dma_en_reg);
 409         return readl_poll_timeout(acp_base + sdw_dma_en_stat_reg, sdw_dma_stat,
 410                                   (sdw_dma_stat == dma_enable), ACP_DELAY_US, ACP_COUNTER);
 411 }
 412
 413 static int acp63_sdw_dma_trigger(struct snd_soc_component *comp,
 414                                  struct snd_pcm_substream *substream,
 415                                  int cmd)
 416 {
 417         struct sdw_dma_dev_data *sdw_data;
 418         int ret;
 419
 420         sdw_data = dev_get_drvdata(comp->dev);
 421         switch (cmd) {
 422         case SNDRV_PCM_TRIGGER_START:
 423         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 424         case SNDRV_PCM_TRIGGER_RESUME:
 425                 ret = acp63_sdw_dma_enable(substream, sdw_data->acp_base, true);
 426                 break;
 427         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 428         case SNDRV_PCM_TRIGGER_SUSPEND:
 429         case SNDRV_PCM_TRIGGER_STOP:
 430                 ret = acp63_sdw_dma_enable(substream, sdw_data->acp_base, false);
 431                 break;
 432         default:
 433                 ret = -EINVAL;
 434         }
 435         if (ret)
 436                 dev_err(comp->dev, "trigger %d failed: %d", cmd, ret);
 437         return ret;
 438 }
 439
 440 static const struct snd_soc_component_driver acp63_sdw_component = {
 441         .name           = DRV_NAME,
 442         .open           = acp63_sdw_dma_open,
 443         .close          = acp63_sdw_dma_close,
 444         .hw_params      = acp63_sdw_dma_hw_params,
 445         .trigger        = acp63_sdw_dma_trigger,
 446         .pointer        = acp63_sdw_dma_pointer,
 447         .pcm_construct  = acp63_sdw_dma_new,
 448         .use_dai_pcm_id = true,
 449
 450 };
 451
 452 static int acp63_sdw_platform_probe(struct platform_device *pdev)
 453 {
 454         struct resource *res;
 455         struct sdw_dma_dev_data *sdw_data;
 456         struct acp63_dev_data *acp_data;
 457         struct device *parent;
 458         int status;
 459
 460         parent = pdev->dev.parent;
 461         acp_data = dev_get_drvdata(parent);
 462         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 463         if (!res) {
 464                 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
 465                 return -ENODEV;
 466         }
 467
 468         sdw_data = devm_kzalloc(&pdev->dev, sizeof(*sdw_data), GFP_KERNEL);
 469         if (!sdw_data)
 470                 return -ENOMEM;
 471
 472         sdw_data->acp_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
 473         if (!sdw_data->acp_base)
 474                 return -ENOMEM;
 475
 476         sdw_data->acp_lock = &acp_data->acp_lock;
 477         dev_set_drvdata(&pdev->dev, sdw_data);
 478         status = devm_snd_soc_register_component(&pdev->dev,
 479                                                  &acp63_sdw_component,
 480                                                  NULL, 0);
 481         if (status) {
 482                 dev_err(&pdev->dev, "Fail to register sdw dma component\n");
 483                 return status;
 484         }
 485         pm_runtime_set_autosuspend_delay(&pdev->dev, ACP_SUSPEND_DELAY_MS);
 486         pm_runtime_use_autosuspend(&pdev->dev);
 487         pm_runtime_mark_last_busy(&pdev->dev);
 488         pm_runtime_set_active(&pdev->dev);
 489         pm_runtime_enable(&pdev->dev);
 490         return 0;
 491 }
 492
 493 static void acp63_sdw_platform_remove(struct platform_device *pdev)
 494 {
 495         pm_runtime_disable(&pdev->dev);
 496 }
 497
 498 static int acp_restore_sdw_dma_config(struct sdw_dma_dev_data *sdw_data)
 499 {
 500         struct acp_sdw_dma_stream *stream;
 501         struct snd_pcm_substream *substream;
 502         struct snd_pcm_runtime *runtime;
 503         u32 period_bytes, buf_size, water_mark_size_reg;
 504         u32 stream_count;
 505         int index, instance, ret;
 506
 507         for (instance = 0; instance < AMD_SDW_MAX_MANAGERS; instance++) {
 508                 if (instance == ACP_SDW0)
 509                         stream_count = ACP63_SDW0_DMA_MAX_STREAMS;
 510                 else
 511                         stream_count = ACP63_SDW1_DMA_MAX_STREAMS;
 512
 513                 for (index = 0; index < stream_count; index++) {
 514                         if (instance == ACP_SDW0) {
 515                                 substream = sdw_data->sdw0_dma_stream[index];
 516                                 water_mark_size_reg =
 517                                                 sdw0_dma_ring_buf_reg[index].water_mark_size_reg;
 518                         } else {
 519                                 substream = sdw_data->sdw1_dma_stream[index];
 520                                 water_mark_size_reg =
 521                                                 sdw1_dma_ring_buf_reg[index].water_mark_size_reg;
 522                         }
 523
 524                         if (substream && substream->runtime) {
 525                                 runtime = substream->runtime;
 526                                 stream = runtime->private_data;
 527                                 period_bytes = frames_to_bytes(runtime, runtime->period_size);
 528                                 buf_size = frames_to_bytes(runtime, runtime->buffer_size);
 529                                 acp63_config_dma(stream, sdw_data->acp_base, index);
 530                                 ret = acp63_configure_sdw_ringbuffer(sdw_data->acp_base, index,
 531                                                                      buf_size, instance);
 532                                 if (ret)
 533                                         return ret;
 534                                 writel(period_bytes, sdw_data->acp_base + water_mark_size_reg);
 535                         }
 536                 }
 537         }
 538         acp63_enable_disable_sdw_dma_interrupts(sdw_data->acp_base, true);
 539         return 0;
 540 }
 541
 542 static int __maybe_unused acp63_sdw_pcm_resume(struct device *dev)
 543 {
 544         struct sdw_dma_dev_data *sdw_data;
 545
 546         sdw_data = dev_get_drvdata(dev);
 547         return acp_restore_sdw_dma_config(sdw_data);
 548 }
 549
 550 static const struct dev_pm_ops acp63_pm_ops = {
 551         SET_SYSTEM_SLEEP_PM_OPS(NULL, acp63_sdw_pcm_resume)
 552 };
 553
 554 static struct platform_driver acp63_sdw_dma_driver = {
 555         .probe = acp63_sdw_platform_probe,
 556         .remove = acp63_sdw_platform_remove,
 557         .driver = {
 558                 .name = "amd_ps_sdw_dma",
 559                 .pm = &acp63_pm_ops,
 560         },
 561 };
 562
 563 module_platform_driver(acp63_sdw_dma_driver);
 564
 565 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
 566 MODULE_DESCRIPTION("AMD ACP6.3 PS SDW DMA Driver");
 567 MODULE_LICENSE("GPL");
 568 MODULE_ALIAS("platform:" DRV_NAME);