sound/soc/amd/acp/acp-platform.c

   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 <[email protected]>
   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 int acp_machine_select(struct acp_dev_data *adata)
  72 {
  73         struct snd_soc_acpi_mach *mach;
  74         int size, platform;
  75
  76         if (adata->flag == FLAG_AMD_LEGACY_ONLY_DMIC) {
  77                 platform = adata->platform;
  78                 adata->mach_dev = platform_device_register_data(adata->dev, "acp-pdm-mach",
  79                                                                 PLATFORM_DEVID_NONE, &platform,
  80                                                                 sizeof(platform));
  81         } else {
  82                 size = sizeof(*adata->machines);
  83                 mach = snd_soc_acpi_find_machine(adata->machines);
  84                 if (!mach) {
  85                         dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
  86                         return -EINVAL;
  87                 }
  88                 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
  89                                                                 PLATFORM_DEVID_NONE, mach, size);
  90         }
  91         if (IS_ERR(adata->mach_dev))
  92                 dev_warn(adata->dev, "Unable to register Machine device\n");
  93         return 0;
  94 }
  95 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
  96
  97 static irqreturn_t i2s_irq_handler(int irq, void *data)
  98 {
  99         struct acp_dev_data *adata = data;
 100         struct acp_resource *rsrc = adata->rsrc;
 101         struct acp_stream *stream;
 102         u16 i2s_flag = 0;
 103         u32 ext_intr_stat, ext_intr_stat1;
 104
 105         if (!adata)
 106                 return IRQ_NONE;
 107
 108         if (adata->rsrc->no_of_ctrls == 2)
 109                 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
 110
 111         ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
 112
 113         spin_lock(&adata->acp_lock);
 114         list_for_each_entry(stream, &adata->stream_list, list) {
 115                 if (ext_intr_stat & stream->irq_bit) {
 116                         writel(stream->irq_bit,
 117                                ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
 118                         snd_pcm_period_elapsed(stream->substream);
 119                         i2s_flag = 1;
 120                 }
 121                 if (adata->rsrc->no_of_ctrls == 2) {
 122                         if (ext_intr_stat1 & stream->irq_bit) {
 123                                 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
 124                                        (rsrc->irqp_used - 1)));
 125                                 snd_pcm_period_elapsed(stream->substream);
 126                                 i2s_flag = 1;
 127                         }
 128                 }
 129         }
 130         spin_unlock(&adata->acp_lock);
 131         if (i2s_flag)
 132                 return IRQ_HANDLED;
 133
 134         return IRQ_NONE;
 135 }
 136
 137 void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
 138 {
 139         struct acp_resource *rsrc = adata->rsrc;
 140         u32 pte_reg, pte_size, reg_val;
 141
 142         /* Use ATU base Group5 */
 143         pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
 144         pte_size =  ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
 145         stream->reg_offset = 0x02000000;
 146
 147         /* Group Enable */
 148         reg_val = rsrc->sram_pte_offset;
 149         writel(reg_val | BIT(31), adata->acp_base + pte_reg);
 150         writel(PAGE_SIZE_4K_ENABLE,  adata->acp_base + pte_size);
 151         writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
 152 }
 153 EXPORT_SYMBOL_NS_GPL(config_pte_for_stream, SND_SOC_ACP_COMMON);
 154
 155 void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
 156 {
 157         struct snd_pcm_substream *substream = stream->substream;
 158         struct acp_resource *rsrc = adata->rsrc;
 159         dma_addr_t addr = substream->dma_buffer.addr;
 160         int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
 161         u32 low, high, val;
 162         u16 page_idx;
 163
 164         val = stream->pte_offset;
 165
 166         for (page_idx = 0; page_idx < num_pages; page_idx++) {
 167                 /* Load the low address of page int ACP SRAM through SRBM */
 168                 low = lower_32_bits(addr);
 169                 high = upper_32_bits(addr);
 170                 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
 171                 high |= BIT(31);
 172                 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);
 173
 174                 /* Move to next physically contiguous page */
 175                 val += 8;
 176                 addr += PAGE_SIZE;
 177         }
 178 }
 179 EXPORT_SYMBOL_NS_GPL(config_acp_dma, SND_SOC_ACP_COMMON);
 180
 181 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
 182 {
 183         struct snd_pcm_runtime *runtime = substream->runtime;
 184         struct device *dev = component->dev;
 185         struct acp_dev_data *adata = dev_get_drvdata(dev);
 186         struct acp_stream *stream;
 187         int ret;
 188
 189         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 190         if (!stream)
 191                 return -ENOMEM;
 192
 193         stream->substream = substream;
 194
 195         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 196                 runtime->hw = acp_pcm_hardware_playback;
 197         else
 198                 runtime->hw = acp_pcm_hardware_capture;
 199
 200         ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, DMA_SIZE);
 201         if (ret) {
 202                 dev_err(component->dev, "set hw constraint HW_PARAM_PERIOD_BYTES failed\n");
 203                 kfree(stream);
 204                 return ret;
 205         }
 206
 207         ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, DMA_SIZE);
 208         if (ret) {
 209                 dev_err(component->dev, "set hw constraint HW_PARAM_BUFFER_BYTES failed\n");
 210                 kfree(stream);
 211                 return ret;
 212         }
 213
 214         ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 215         if (ret < 0) {
 216                 dev_err(component->dev, "set integer constraint failed\n");
 217                 kfree(stream);
 218                 return ret;
 219         }
 220         runtime->private_data = stream;
 221
 222         writel(1, ACP_EXTERNAL_INTR_ENB(adata));
 223
 224         spin_lock_irq(&adata->acp_lock);
 225         list_add_tail(&stream->list, &adata->stream_list);
 226         spin_unlock_irq(&adata->acp_lock);
 227
 228         return ret;
 229 }
 230
 231 static int acp_dma_hw_params(struct snd_soc_component *component,
 232                              struct snd_pcm_substream *substream,
 233                              struct snd_pcm_hw_params *params)
 234 {
 235         struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
 236         struct acp_stream *stream = substream->runtime->private_data;
 237         u64 size = params_buffer_bytes(params);
 238
 239         /* Configure ACP DMA block with params */
 240         config_pte_for_stream(adata, stream);
 241         config_acp_dma(adata, stream, size);
 242
 243         return 0;
 244 }
 245
 246 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
 247                                          struct snd_pcm_substream *substream)
 248 {
 249         struct device *dev = component->dev;
 250         struct acp_dev_data *adata = dev_get_drvdata(dev);
 251         struct acp_stream *stream = substream->runtime->private_data;
 252         u32 pos, buffersize;
 253         u64 bytescount;
 254
 255         buffersize = frames_to_bytes(substream->runtime,
 256                                      substream->runtime->buffer_size);
 257
 258         bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
 259
 260         if (bytescount > stream->bytescount)
 261                 bytescount -= stream->bytescount;
 262
 263         pos = do_div(bytescount, buffersize);
 264
 265         return bytes_to_frames(substream->runtime, pos);
 266 }
 267
 268 static int acp_dma_new(struct snd_soc_component *component,
 269                        struct snd_soc_pcm_runtime *rtd)
 270 {
 271         struct device *parent = component->dev->parent;
 272
 273         snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
 274                                        parent, MIN_BUFFER, MAX_BUFFER);
 275         return 0;
 276 }
 277
 278 static int acp_dma_close(struct snd_soc_component *component,
 279                          struct snd_pcm_substream *substream)
 280 {
 281         struct device *dev = component->dev;
 282         struct acp_dev_data *adata = dev_get_drvdata(dev);
 283         struct acp_stream *stream = substream->runtime->private_data;
 284
 285         /* Remove entry from list */
 286         spin_lock_irq(&adata->acp_lock);
 287         list_del(&stream->list);
 288         spin_unlock_irq(&adata->acp_lock);
 289         kfree(stream);
 290
 291         return 0;
 292 }
 293
 294 static const struct snd_soc_component_driver acp_pcm_component = {
 295         .name                   = DRV_NAME,
 296         .open                   = acp_dma_open,
 297         .close                  = acp_dma_close,
 298         .hw_params              = acp_dma_hw_params,
 299         .pointer                = acp_dma_pointer,
 300         .pcm_construct          = acp_dma_new,
 301         .legacy_dai_naming      = 1,
 302 };
 303
 304 int acp_platform_register(struct device *dev)
 305 {
 306         struct acp_dev_data *adata = dev_get_drvdata(dev);
 307         struct snd_soc_dai_driver;
 308         unsigned int status;
 309
 310         status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
 311                                   IRQF_SHARED, "ACP_I2S_IRQ", adata);
 312         if (status) {
 313                 dev_err(dev, "ACP I2S IRQ request failed\n");
 314                 return status;
 315         }
 316
 317         status = devm_snd_soc_register_component(dev, &acp_pcm_component,
 318                                                  adata->dai_driver,
 319                                                  adata->num_dai);
 320         if (status) {
 321                 dev_err(dev, "Fail to register acp i2s component\n");
 322                 return status;
 323         }
 324
 325         INIT_LIST_HEAD(&adata->stream_list);
 326         spin_lock_init(&adata->acp_lock);
 327
 328         return 0;
 329 }
 330 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
 331
 332 int acp_platform_unregister(struct device *dev)
 333 {
 334         struct acp_dev_data *adata = dev_get_drvdata(dev);
 335
 336         if (adata->mach_dev)
 337                 platform_device_unregister(adata->mach_dev);
 338         return 0;
 339 }
 340 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
 341
 342 MODULE_DESCRIPTION("AMD ACP PCM Driver");
 343 MODULE_LICENSE("Dual BSD/GPL");
 344 MODULE_ALIAS(DRV_NAME);