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/pm_runtime.h>
  22 #include <linux/dma-mapping.h>
  23
  24 #include "amd.h"
  25
  26 #define DRV_NAME "acp_i2s_dma"
  27
  28 static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
  29         .info = SNDRV_PCM_INFO_INTERLEAVED |
  30                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  31                 SNDRV_PCM_INFO_BATCH |
  32                 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
  33                 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
  34         .formats = SNDRV_PCM_FMTBIT_S16_LE |  SNDRV_PCM_FMTBIT_S8 |
  35                    SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
  36                    SNDRV_PCM_FMTBIT_S32_LE,
  37         .channels_min = 2,
  38         .channels_max = 8,
  39         .rates = SNDRV_PCM_RATE_8000_96000,
  40         .rate_min = 8000,
  41         .rate_max = 96000,
  42         .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
  43         .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
  44         .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
  45         .periods_min = PLAYBACK_MIN_NUM_PERIODS,
  46         .periods_max = PLAYBACK_MAX_NUM_PERIODS,
  47 };
  48
  49 static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
  50         .info = SNDRV_PCM_INFO_INTERLEAVED |
  51                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  52                 SNDRV_PCM_INFO_BATCH |
  53                 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
  54                 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
  55         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
  56                    SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
  57                    SNDRV_PCM_FMTBIT_S32_LE,
  58         .channels_min = 2,
  59         .channels_max = 2,
  60         .rates = SNDRV_PCM_RATE_8000_48000,
  61         .rate_min = 8000,
  62         .rate_max = 48000,
  63         .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
  64         .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
  65         .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
  66         .periods_min = CAPTURE_MIN_NUM_PERIODS,
  67         .periods_max = CAPTURE_MAX_NUM_PERIODS,
  68 };
  69
  70 int acp_machine_select(struct acp_dev_data *adata)
  71 {
  72         struct snd_soc_acpi_mach *mach;
  73         int size;
  74
  75         size = sizeof(*adata->machines);
  76         mach = snd_soc_acpi_find_machine(adata->machines);
  77         if (!mach) {
  78                 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n");
  79                 return -EINVAL;
  80         }
  81
  82         adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name,
  83                                                         PLATFORM_DEVID_NONE, mach, size);
  84         if (IS_ERR(adata->mach_dev))
  85                 dev_warn(adata->dev, "Unable to register Machine device\n");
  86
  87         return 0;
  88 }
  89 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON);
  90
  91 static irqreturn_t i2s_irq_handler(int irq, void *data)
  92 {
  93         struct acp_dev_data *adata = data;
  94         struct acp_resource *rsrc = adata->rsrc;
  95         struct acp_stream *stream;
  96         u16 i2s_flag = 0;
  97         u32 ext_intr_stat, ext_intr_stat1;
  98
  99         if (!adata)
 100                 return IRQ_NONE;
 101
 102         if (adata->rsrc->no_of_ctrls == 2)
 103                 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1)));
 104
 105         ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
 106
 107         spin_lock(&adata->acp_lock);
 108         list_for_each_entry(stream, &adata->stream_list, list) {
 109                 if (ext_intr_stat & stream->irq_bit) {
 110                         writel(stream->irq_bit,
 111                                ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used));
 112                         snd_pcm_period_elapsed(stream->substream);
 113                         i2s_flag = 1;
 114                 }
 115                 if (adata->rsrc->no_of_ctrls == 2) {
 116                         if (ext_intr_stat1 & stream->irq_bit) {
 117                                 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata,
 118                                        (rsrc->irqp_used - 1)));
 119                                 snd_pcm_period_elapsed(stream->substream);
 120                                 i2s_flag = 1;
 121                         }
 122                 }
 123         }
 124         spin_unlock(&adata->acp_lock);
 125         if (i2s_flag)
 126                 return IRQ_HANDLED;
 127
 128         return IRQ_NONE;
 129 }
 130
 131 static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream)
 132 {
 133         struct acp_resource *rsrc = adata->rsrc;
 134         u32 pte_reg, pte_size, reg_val;
 135
 136         /* Use ATU base Group5 */
 137         pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5;
 138         pte_size =  ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5;
 139         stream->reg_offset = 0x02000000;
 140
 141         /* Group Enable */
 142         reg_val = rsrc->sram_pte_offset;
 143         writel(reg_val | BIT(31), adata->acp_base + pte_reg);
 144         writel(PAGE_SIZE_4K_ENABLE,  adata->acp_base + pte_size);
 145         writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
 146 }
 147
 148 static void config_acp_dma(struct acp_dev_data *adata, struct acp_stream *stream, int size)
 149 {
 150         struct snd_pcm_substream *substream = stream->substream;
 151         struct acp_resource *rsrc = adata->rsrc;
 152         dma_addr_t addr = substream->dma_buffer.addr;
 153         int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
 154         u32 low, high, val;
 155         u16 page_idx;
 156
 157         val = stream->pte_offset;
 158
 159         for (page_idx = 0; page_idx < num_pages; page_idx++) {
 160                 /* Load the low address of page int ACP SRAM through SRBM */
 161                 low = lower_32_bits(addr);
 162                 high = upper_32_bits(addr);
 163                 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val);
 164                 high |= BIT(31);
 165                 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4);
 166
 167                 /* Move to next physically contiguous page */
 168                 val += 8;
 169                 addr += PAGE_SIZE;
 170         }
 171 }
 172
 173 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream)
 174 {
 175         struct snd_pcm_runtime *runtime = substream->runtime;
 176         struct device *dev = component->dev;
 177         struct acp_dev_data *adata = dev_get_drvdata(dev);
 178         struct acp_stream *stream;
 179         int ret;
 180
 181         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 182         if (!stream)
 183                 return -ENOMEM;
 184
 185         stream->substream = substream;
 186
 187         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 188                 runtime->hw = acp_pcm_hardware_playback;
 189         else
 190                 runtime->hw = acp_pcm_hardware_capture;
 191
 192         ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 193         if (ret < 0) {
 194                 dev_err(component->dev, "set integer constraint failed\n");
 195                 kfree(stream);
 196                 return ret;
 197         }
 198         runtime->private_data = stream;
 199
 200         writel(1, ACP_EXTERNAL_INTR_ENB(adata));
 201
 202         spin_lock_irq(&adata->acp_lock);
 203         list_add_tail(&stream->list, &adata->stream_list);
 204         spin_unlock_irq(&adata->acp_lock);
 205
 206         return ret;
 207 }
 208
 209 static int acp_dma_hw_params(struct snd_soc_component *component,
 210                              struct snd_pcm_substream *substream,
 211                              struct snd_pcm_hw_params *params)
 212 {
 213         struct acp_dev_data *adata = snd_soc_component_get_drvdata(component);
 214         struct acp_stream *stream = substream->runtime->private_data;
 215         u64 size = params_buffer_bytes(params);
 216
 217         /* Configure ACP DMA block with params */
 218         config_pte_for_stream(adata, stream);
 219         config_acp_dma(adata, stream, size);
 220
 221         return 0;
 222 }
 223
 224 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
 225                                          struct snd_pcm_substream *substream)
 226 {
 227         struct device *dev = component->dev;
 228         struct acp_dev_data *adata = dev_get_drvdata(dev);
 229         struct acp_stream *stream = substream->runtime->private_data;
 230         u32 pos, buffersize;
 231         u64 bytescount;
 232
 233         buffersize = frames_to_bytes(substream->runtime,
 234                                      substream->runtime->buffer_size);
 235
 236         bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
 237
 238         if (bytescount > stream->bytescount)
 239                 bytescount -= stream->bytescount;
 240
 241         pos = do_div(bytescount, buffersize);
 242
 243         return bytes_to_frames(substream->runtime, pos);
 244 }
 245
 246 static int acp_dma_new(struct snd_soc_component *component,
 247                        struct snd_soc_pcm_runtime *rtd)
 248 {
 249         struct device *parent = component->dev->parent;
 250
 251         snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
 252                                        parent, MIN_BUFFER, MAX_BUFFER);
 253         return 0;
 254 }
 255
 256 static int acp_dma_close(struct snd_soc_component *component,
 257                          struct snd_pcm_substream *substream)
 258 {
 259         struct device *dev = component->dev;
 260         struct acp_dev_data *adata = dev_get_drvdata(dev);
 261         struct acp_stream *stream = substream->runtime->private_data;
 262
 263         /* Remove entry from list */
 264         spin_lock_irq(&adata->acp_lock);
 265         list_del(&stream->list);
 266         spin_unlock_irq(&adata->acp_lock);
 267         kfree(stream);
 268
 269         return 0;
 270 }
 271
 272 static const struct snd_soc_component_driver acp_pcm_component = {
 273         .name                   = DRV_NAME,
 274         .open                   = acp_dma_open,
 275         .close                  = acp_dma_close,
 276         .hw_params              = acp_dma_hw_params,
 277         .pointer                = acp_dma_pointer,
 278         .pcm_construct          = acp_dma_new,
 279         .legacy_dai_naming      = 1,
 280 };
 281
 282 int acp_platform_register(struct device *dev)
 283 {
 284         struct acp_dev_data *adata = dev_get_drvdata(dev);
 285         struct snd_soc_dai_driver;
 286         unsigned int status;
 287
 288         status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler,
 289                                   IRQF_SHARED, "ACP_I2S_IRQ", adata);
 290         if (status) {
 291                 dev_err(dev, "ACP I2S IRQ request failed\n");
 292                 return status;
 293         }
 294
 295         status = devm_snd_soc_register_component(dev, &acp_pcm_component,
 296                                                  adata->dai_driver,
 297                                                  adata->num_dai);
 298         if (status) {
 299                 dev_err(dev, "Fail to register acp i2s component\n");
 300                 return status;
 301         }
 302
 303         INIT_LIST_HEAD(&adata->stream_list);
 304         spin_lock_init(&adata->acp_lock);
 305
 306         return 0;
 307 }
 308 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON);
 309
 310 int acp_platform_unregister(struct device *dev)
 311 {
 312         struct acp_dev_data *adata = dev_get_drvdata(dev);
 313
 314         if (adata->mach_dev)
 315                 platform_device_unregister(adata->mach_dev);
 316         return 0;
 317 }
 318 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON);
 319
 320 MODULE_DESCRIPTION("AMD ACP PCM Driver");
 321 MODULE_LICENSE("Dual BSD/GPL");
 322 MODULE_ALIAS(DRV_NAME);