sound/soc/amd/acp/acp-i2s.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 <AjitKumar.Pandey@amd.com>
   9 //
  10
  11 /*
  12  * Generic Hardware interface for ACP Audio I2S controller
  13  */
  14
  15 #include <linux/platform_device.h>
  16 #include <linux/module.h>
  17 #include <linux/err.h>
  18 #include <linux/io.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/soc-dai.h>
  22 #include <linux/dma-mapping.h>
  23
  24 #include "amd.h"
  25
  26 #define DRV_NAME "acp_i2s_playcap"
  27
  28 static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params,
  29                             struct snd_soc_dai *dai)
  30 {
  31         struct device *dev = dai->component->dev;
  32         struct acp_dev_data *adata;
  33         u32 val;
  34         u32 xfer_resolution;
  35         u32 reg_val;
  36
  37         adata = snd_soc_dai_get_drvdata(dai);
  38
  39         /* These values are as per Hardware Spec */
  40         switch (params_format(params)) {
  41         case SNDRV_PCM_FORMAT_U8:
  42         case SNDRV_PCM_FORMAT_S8:
  43                 xfer_resolution = 0x0;
  44                 break;
  45         case SNDRV_PCM_FORMAT_S16_LE:
  46                 xfer_resolution = 0x02;
  47                 break;
  48         case SNDRV_PCM_FORMAT_S24_LE:
  49                 xfer_resolution = 0x04;
  50                 break;
  51         case SNDRV_PCM_FORMAT_S32_LE:
  52                 xfer_resolution = 0x05;
  53                 break;
  54         default:
  55                 return -EINVAL;
  56         }
  57
  58         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
  59                 switch (dai->driver->id) {
  60                 case I2S_BT_INSTANCE:
  61                         reg_val = ACP_BTTDM_ITER;
  62                         break;
  63                 case I2S_SP_INSTANCE:
  64                         reg_val = ACP_I2STDM_ITER;
  65                         break;
  66                 default:
  67                         dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
  68                         return -EINVAL;
  69                 }
  70         } else {
  71                 switch (dai->driver->id) {
  72                 case I2S_BT_INSTANCE:
  73                         reg_val = ACP_BTTDM_IRER;
  74                         break;
  75                 case I2S_SP_INSTANCE:
  76                         reg_val = ACP_I2STDM_IRER;
  77                         break;
  78                 default:
  79                         dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
  80                         return -EINVAL;
  81                 }
  82         }
  83
  84         val = readl(adata->acp_base + reg_val);
  85         val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK;
  86         val = val | (xfer_resolution  << 3);
  87         writel(val, adata->acp_base + reg_val);
  88
  89         return 0;
  90 }
  91
  92 static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
  93 {
  94         struct acp_stream *stream = substream->runtime->private_data;
  95         struct device *dev = dai->component->dev;
  96         struct acp_dev_data *adata = dev_get_drvdata(dev);
  97         u32 val, period_bytes, reg_val, ier_val, water_val, buf_size, buf_reg;
  98
  99         period_bytes = frames_to_bytes(substream->runtime, substream->runtime->period_size);
 100         buf_size = frames_to_bytes(substream->runtime, substream->runtime->buffer_size);
 101
 102         switch (cmd) {
 103         case SNDRV_PCM_TRIGGER_START:
 104         case SNDRV_PCM_TRIGGER_RESUME:
 105         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 106                 stream->bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream);
 107                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 108                         switch (dai->driver->id) {
 109                         case I2S_BT_INSTANCE:
 110                                 water_val = ACP_BT_TX_INTR_WATERMARK_SIZE;
 111                                 reg_val = ACP_BTTDM_ITER;
 112                                 ier_val = ACP_BTTDM_IER;
 113                                 buf_reg = ACP_BT_TX_RINGBUFSIZE;
 114                                 break;
 115                         case I2S_SP_INSTANCE:
 116                                 water_val = ACP_I2S_TX_INTR_WATERMARK_SIZE;
 117                                 reg_val = ACP_I2STDM_ITER;
 118                                 ier_val = ACP_I2STDM_IER;
 119                                 buf_reg = ACP_I2S_TX_RINGBUFSIZE;
 120                                 break;
 121                         default:
 122                                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 123                                 return -EINVAL;
 124                         }
 125                 } else {
 126                         switch (dai->driver->id) {
 127                         case I2S_BT_INSTANCE:
 128                                 water_val = ACP_BT_RX_INTR_WATERMARK_SIZE;
 129                                 reg_val = ACP_BTTDM_IRER;
 130                                 ier_val = ACP_BTTDM_IER;
 131                                 buf_reg = ACP_BT_RX_RINGBUFSIZE;
 132                                 break;
 133                         case I2S_SP_INSTANCE:
 134                                 water_val = ACP_I2S_RX_INTR_WATERMARK_SIZE;
 135                                 reg_val = ACP_I2STDM_IRER;
 136                                 ier_val = ACP_I2STDM_IER;
 137                                 buf_reg = ACP_I2S_RX_RINGBUFSIZE;
 138                                 break;
 139                         default:
 140                                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 141                                 return -EINVAL;
 142                         }
 143                 }
 144                 writel(period_bytes, adata->acp_base + water_val);
 145                 writel(buf_size, adata->acp_base + buf_reg);
 146                 val = readl(adata->acp_base + reg_val);
 147                 val = val | BIT(0);
 148                 writel(val, adata->acp_base + reg_val);
 149                 writel(1, adata->acp_base + ier_val);
 150                 return 0;
 151         case SNDRV_PCM_TRIGGER_STOP:
 152         case SNDRV_PCM_TRIGGER_SUSPEND:
 153         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 154                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 155                         switch (dai->driver->id) {
 156                         case I2S_BT_INSTANCE:
 157                                 reg_val = ACP_BTTDM_ITER;
 158                                 break;
 159                         case I2S_SP_INSTANCE:
 160                                 reg_val = ACP_I2STDM_ITER;
 161                                 break;
 162                         default:
 163                                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 164                                 return -EINVAL;
 165                         }
 166
 167                 } else {
 168                         switch (dai->driver->id) {
 169                         case I2S_BT_INSTANCE:
 170                                 reg_val = ACP_BTTDM_IRER;
 171                                 break;
 172                         case I2S_SP_INSTANCE:
 173                                 reg_val = ACP_I2STDM_IRER;
 174                                 break;
 175                         default:
 176                                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 177                                 return -EINVAL;
 178                         }
 179                 }
 180                 val = readl(adata->acp_base + reg_val);
 181                 val = val & ~BIT(0);
 182                 writel(val, adata->acp_base + reg_val);
 183
 184                 if (!(readl(adata->acp_base + ACP_BTTDM_ITER) & BIT(0)) &&
 185                     !(readl(adata->acp_base + ACP_BTTDM_IRER) & BIT(0)))
 186                         writel(0, adata->acp_base + ACP_BTTDM_IER);
 187                 if (!(readl(adata->acp_base + ACP_I2STDM_ITER) & BIT(0)) &&
 188                     !(readl(adata->acp_base + ACP_I2STDM_IRER) & BIT(0)))
 189                         writel(0, adata->acp_base + ACP_I2STDM_IER);
 190                 return 0;
 191         default:
 192                 return -EINVAL;
 193         }
 194
 195         return 0;
 196 }
 197
 198 static int acp_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 199 {
 200         struct device *dev = dai->component->dev;
 201         struct acp_dev_data *adata = dev_get_drvdata(dev);
 202         struct acp_stream *stream = substream->runtime->private_data;
 203         u32 reg_dma_size = 0, reg_fifo_size = 0, reg_fifo_addr = 0;
 204         u32 phy_addr = 0, acp_fifo_addr = 0, ext_int_ctrl;
 205         unsigned int dir = substream->stream;
 206
 207         switch (dai->driver->id) {
 208         case I2S_SP_INSTANCE:
 209                 if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
 210                         reg_dma_size = ACP_I2S_TX_DMA_SIZE;
 211                         acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
 212                                                 SP_PB_FIFO_ADDR_OFFSET;
 213                         reg_fifo_addr = ACP_I2S_TX_FIFOADDR;
 214                         reg_fifo_size = ACP_I2S_TX_FIFOSIZE;
 215
 216                         phy_addr = I2S_SP_TX_MEM_WINDOW_START + stream->reg_offset;
 217                         writel(phy_addr, adata->acp_base + ACP_I2S_TX_RINGBUFADDR);
 218                 } else {
 219                         reg_dma_size = ACP_I2S_RX_DMA_SIZE;
 220                         acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
 221                                                 SP_CAPT_FIFO_ADDR_OFFSET;
 222                         reg_fifo_addr = ACP_I2S_RX_FIFOADDR;
 223                         reg_fifo_size = ACP_I2S_RX_FIFOSIZE;
 224                         phy_addr = I2S_SP_RX_MEM_WINDOW_START + stream->reg_offset;
 225                         writel(phy_addr, adata->acp_base + ACP_I2S_RX_RINGBUFADDR);
 226                 }
 227                 break;
 228         case I2S_BT_INSTANCE:
 229                 if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
 230                         reg_dma_size = ACP_BT_TX_DMA_SIZE;
 231                         acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
 232                                                 BT_PB_FIFO_ADDR_OFFSET;
 233                         reg_fifo_addr = ACP_BT_TX_FIFOADDR;
 234                         reg_fifo_size = ACP_BT_TX_FIFOSIZE;
 235
 236                         phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset;
 237                         writel(phy_addr, adata->acp_base + ACP_BT_TX_RINGBUFADDR);
 238                 } else {
 239                         reg_dma_size = ACP_BT_RX_DMA_SIZE;
 240                         acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
 241                                                 BT_CAPT_FIFO_ADDR_OFFSET;
 242                         reg_fifo_addr = ACP_BT_RX_FIFOADDR;
 243                         reg_fifo_size = ACP_BT_RX_FIFOSIZE;
 244
 245                         phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset;
 246                         writel(phy_addr, adata->acp_base + ACP_BT_RX_RINGBUFADDR);
 247                 }
 248                 break;
 249         default:
 250                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 251                 return -EINVAL;
 252         }
 253
 254         writel(DMA_SIZE, adata->acp_base + reg_dma_size);
 255         writel(acp_fifo_addr, adata->acp_base + reg_fifo_addr);
 256         writel(FIFO_SIZE, adata->acp_base + reg_fifo_size);
 257
 258         ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
 259         ext_int_ctrl |= BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
 260                         | BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD);
 261
 262         writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
 263
 264         return 0;
 265 }
 266
 267 static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 268 {
 269         struct acp_stream *stream = substream->runtime->private_data;
 270         struct device *dev = dai->component->dev;
 271         unsigned int dir = substream->stream;
 272         unsigned int irq_bit = 0;
 273
 274         switch (dai->driver->id) {
 275         case I2S_SP_INSTANCE:
 276                 if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
 277                         irq_bit = BIT(I2S_TX_THRESHOLD);
 278                         stream->pte_offset = ACP_SRAM_SP_PB_PTE_OFFSET;
 279                         stream->fifo_offset = SP_PB_FIFO_ADDR_OFFSET;
 280                 } else {
 281                         irq_bit = BIT(I2S_RX_THRESHOLD);
 282                         stream->pte_offset = ACP_SRAM_SP_CP_PTE_OFFSET;
 283                         stream->fifo_offset = SP_CAPT_FIFO_ADDR_OFFSET;
 284                 }
 285                 break;
 286         case I2S_BT_INSTANCE:
 287                 if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
 288                         irq_bit = BIT(BT_TX_THRESHOLD);
 289                         stream->pte_offset = ACP_SRAM_BT_PB_PTE_OFFSET;
 290                         stream->fifo_offset = BT_PB_FIFO_ADDR_OFFSET;
 291                 } else {
 292                         irq_bit = BIT(BT_RX_THRESHOLD);
 293                         stream->pte_offset = ACP_SRAM_BT_CP_PTE_OFFSET;
 294                         stream->fifo_offset = BT_CAPT_FIFO_ADDR_OFFSET;
 295                 }
 296                 break;
 297         default:
 298                 dev_err(dev, "Invalid dai id %x\n", dai->driver->id);
 299                 return -EINVAL;
 300         }
 301
 302         /* Save runtime dai configuration in stream */
 303         stream->id = dai->driver->id + dir;
 304         stream->dai_id = dai->driver->id;
 305         stream->irq_bit = irq_bit;
 306
 307         return 0;
 308 }
 309
 310 const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops = {
 311         .startup = acp_i2s_startup,
 312         .hw_params = acp_i2s_hwparams,
 313         .prepare = acp_i2s_prepare,
 314         .trigger = acp_i2s_trigger,
 315 };
 316 EXPORT_SYMBOL_NS_GPL(asoc_acp_cpu_dai_ops, SND_SOC_ACP_COMMON);
 317
 318 int asoc_acp_i2s_probe(struct snd_soc_dai *dai)
 319 {
 320         struct device *dev = dai->component->dev;
 321         struct acp_dev_data *adata = dev_get_drvdata(dev);
 322         unsigned int val;
 323
 324         if (!adata->acp_base) {
 325                 dev_err(dev, "I2S base is NULL\n");
 326                 return -EINVAL;
 327         }
 328
 329         val = readl(adata->acp_base + ACP_I2S_PIN_CONFIG);
 330         if (val != I2S_MODE) {
 331                 dev_err(dev, "I2S Mode not supported val %x\n", val);
 332                 return -EINVAL;
 333         }
 334
 335         return 0;
 336 }
 337 EXPORT_SYMBOL_NS_GPL(asoc_acp_i2s_probe, SND_SOC_ACP_COMMON);
 338
 339 MODULE_LICENSE("Dual BSD/GPL");
 340 MODULE_ALIAS(DRV_NAME);