sound/soc/amd/raven/acp3x-i2s.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // AMD ALSA SoC PCM Driver
   4 //
   5 //Copyright 2016 Advanced Micro Devices, Inc.
   6
   7 #include <linux/platform_device.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/io.h>
  11 #include <sound/pcm_params.h>
  12 #include <sound/soc.h>
  13 #include <sound/soc-dai.h>
  14 #include <linux/dma-mapping.h>
  15
  16 #include "acp3x.h"
  17
  18 #define DRV_NAME "acp3x_i2s_playcap"
  19
  20 static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
  21                                         unsigned int fmt)
  22 {
  23         struct i2s_dev_data *adata;
  24         int mode;
  25
  26         adata = snd_soc_dai_get_drvdata(cpu_dai);
  27         mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
  28         switch (mode) {
  29         case SND_SOC_DAIFMT_I2S:
  30                 adata->tdm_mode = TDM_DISABLE;
  31                 break;
  32         case SND_SOC_DAIFMT_DSP_A:
  33                 adata->tdm_mode = TDM_ENABLE;
  34                 break;
  35         default:
  36                 return -EINVAL;
  37         }
  38         return 0;
  39 }
  40
  41 static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai,
  42                 u32 tx_mask, u32 rx_mask, int slots, int slot_width)
  43 {
  44         struct i2s_dev_data *adata;
  45         u32 frm_len;
  46         u16 slot_len;
  47
  48         adata = snd_soc_dai_get_drvdata(cpu_dai);
  49
  50         /* These values are as per Hardware Spec */
  51         switch (slot_width) {
  52         case SLOT_WIDTH_8:
  53                 slot_len = 8;
  54                 break;
  55         case SLOT_WIDTH_16:
  56                 slot_len = 16;
  57                 break;
  58         case SLOT_WIDTH_24:
  59                 slot_len = 24;
  60                 break;
  61         case SLOT_WIDTH_32:
  62                 slot_len = 0;
  63                 break;
  64         default:
  65                 return -EINVAL;
  66         }
  67         frm_len = FRM_LEN | (slots << 15) | (slot_len << 18);
  68         adata->tdm_fmt = frm_len;
  69         return 0;
  70 }
  71
  72 static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
  73         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
  74 {
  75         struct i2s_stream_instance *rtd;
  76         struct snd_soc_pcm_runtime *prtd;
  77         struct snd_soc_card *card;
  78         struct acp3x_platform_info *pinfo;
  79         struct i2s_dev_data *adata;
  80         u32 val;
  81         u32 reg_val, frmt_reg;
  82
  83         prtd = asoc_substream_to_rtd(substream);
  84         rtd = substream->runtime->private_data;
  85         card = prtd->card;
  86         adata = snd_soc_dai_get_drvdata(dai);
  87         pinfo = snd_soc_card_get_drvdata(card);
  88         if (pinfo) {
  89                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  90                         rtd->i2s_instance = pinfo->play_i2s_instance;
  91                 else
  92                         rtd->i2s_instance = pinfo->cap_i2s_instance;
  93         }
  94
  95         /* These values are as per Hardware Spec */
  96         switch (params_format(params)) {
  97         case SNDRV_PCM_FORMAT_U8:
  98         case SNDRV_PCM_FORMAT_S8:
  99                 rtd->xfer_resolution = 0x0;
 100                 break;
 101         case SNDRV_PCM_FORMAT_S16_LE:
 102                 rtd->xfer_resolution = 0x02;
 103                 break;
 104         case SNDRV_PCM_FORMAT_S24_LE:
 105                 rtd->xfer_resolution = 0x04;
 106                 break;
 107         case SNDRV_PCM_FORMAT_S32_LE:
 108                 rtd->xfer_resolution = 0x05;
 109                 break;
 110         default:
 111                 return -EINVAL;
 112         }
 113         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 114                 switch (rtd->i2s_instance) {
 115                 case I2S_BT_INSTANCE:
 116                         reg_val = mmACP_BTTDM_ITER;
 117                         frmt_reg = mmACP_BTTDM_TXFRMT;
 118                         break;
 119                 case I2S_SP_INSTANCE:
 120                 default:
 121                         reg_val = mmACP_I2STDM_ITER;
 122                         frmt_reg = mmACP_I2STDM_TXFRMT;
 123                 }
 124         } else {
 125                 switch (rtd->i2s_instance) {
 126                 case I2S_BT_INSTANCE:
 127                         reg_val = mmACP_BTTDM_IRER;
 128                         frmt_reg = mmACP_BTTDM_RXFRMT;
 129                         break;
 130                 case I2S_SP_INSTANCE:
 131                 default:
 132                         reg_val = mmACP_I2STDM_IRER;
 133                         frmt_reg = mmACP_I2STDM_RXFRMT;
 134                 }
 135         }
 136         if (adata->tdm_mode) {
 137                 val = rv_readl(rtd->acp3x_base + reg_val);
 138                 rv_writel(val | 0x2, rtd->acp3x_base + reg_val);
 139                 rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg);
 140         }
 141         val = rv_readl(rtd->acp3x_base + reg_val);
 142         val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK;
 143         val = val | (rtd->xfer_resolution  << 3);
 144         rv_writel(val, rtd->acp3x_base + reg_val);
 145         return 0;
 146 }
 147
 148 static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
 149                                 int cmd, struct snd_soc_dai *dai)
 150 {
 151         struct i2s_stream_instance *rtd;
 152         u32 ret, val, period_bytes, reg_val, ier_val, water_val;
 153         u32 buf_size, buf_reg;
 154
 155         rtd = substream->runtime->private_data;
 156         period_bytes = frames_to_bytes(substream->runtime,
 157                         substream->runtime->period_size);
 158         buf_size = frames_to_bytes(substream->runtime,
 159                         substream->runtime->buffer_size);
 160         switch (cmd) {
 161         case SNDRV_PCM_TRIGGER_START:
 162         case SNDRV_PCM_TRIGGER_RESUME:
 163         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 164                 rtd->bytescount = acp_get_byte_count(rtd,
 165                                                 substream->stream);
 166                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 167                         switch (rtd->i2s_instance) {
 168                         case I2S_BT_INSTANCE:
 169                                 water_val =
 170                                         mmACP_BT_TX_INTR_WATERMARK_SIZE;
 171                                 reg_val = mmACP_BTTDM_ITER;
 172                                 ier_val = mmACP_BTTDM_IER;
 173                                 buf_reg = mmACP_BT_TX_RINGBUFSIZE;
 174                                 break;
 175                         case I2S_SP_INSTANCE:
 176                         default:
 177                                 water_val =
 178                                         mmACP_I2S_TX_INTR_WATERMARK_SIZE;
 179                                 reg_val = mmACP_I2STDM_ITER;
 180                                 ier_val = mmACP_I2STDM_IER;
 181                                 buf_reg = mmACP_I2S_TX_RINGBUFSIZE;
 182                         }
 183                 } else {
 184                         switch (rtd->i2s_instance) {
 185                         case I2S_BT_INSTANCE:
 186                                 water_val =
 187                                         mmACP_BT_RX_INTR_WATERMARK_SIZE;
 188                                 reg_val = mmACP_BTTDM_IRER;
 189                                 ier_val = mmACP_BTTDM_IER;
 190                                 buf_reg = mmACP_BT_RX_RINGBUFSIZE;
 191                                 break;
 192                         case I2S_SP_INSTANCE:
 193                         default:
 194                                 water_val =
 195                                         mmACP_I2S_RX_INTR_WATERMARK_SIZE;
 196                                 reg_val = mmACP_I2STDM_IRER;
 197                                 ier_val = mmACP_I2STDM_IER;
 198                                 buf_reg = mmACP_I2S_RX_RINGBUFSIZE;
 199                         }
 200                 }
 201                 rv_writel(period_bytes, rtd->acp3x_base + water_val);
 202                 rv_writel(buf_size, rtd->acp3x_base + buf_reg);
 203                 val = rv_readl(rtd->acp3x_base + reg_val);
 204                 val = val | BIT(0);
 205                 rv_writel(val, rtd->acp3x_base + reg_val);
 206                 rv_writel(1, rtd->acp3x_base + ier_val);
 207                 ret = 0;
 208                 break;
 209         case SNDRV_PCM_TRIGGER_STOP:
 210         case SNDRV_PCM_TRIGGER_SUSPEND:
 211         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 212                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 213                         switch (rtd->i2s_instance) {
 214                         case I2S_BT_INSTANCE:
 215                                 reg_val = mmACP_BTTDM_ITER;
 216                                 break;
 217                         case I2S_SP_INSTANCE:
 218                         default:
 219                                 reg_val = mmACP_I2STDM_ITER;
 220                         }
 221
 222                 } else {
 223                         switch (rtd->i2s_instance) {
 224                         case I2S_BT_INSTANCE:
 225                                 reg_val = mmACP_BTTDM_IRER;
 226                                 break;
 227                         case I2S_SP_INSTANCE:
 228                         default:
 229                                 reg_val = mmACP_I2STDM_IRER;
 230                         }
 231                 }
 232                 val = rv_readl(rtd->acp3x_base + reg_val);
 233                 val = val & ~BIT(0);
 234                 rv_writel(val, rtd->acp3x_base + reg_val);
 235
 236                 if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) &&
 237                      !(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0)))
 238                         rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
 239                 if (!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER) & BIT(0)) &&
 240                      !(rv_readl(rtd->acp3x_base + mmACP_I2STDM_IRER) & BIT(0)))
 241                         rv_writel(0, rtd->acp3x_base + mmACP_I2STDM_IER);
 242                 ret = 0;
 243                 break;
 244         default:
 245                 ret = -EINVAL;
 246                 break;
 247         }
 248
 249         return ret;
 250 }
 251
 252 static const struct snd_soc_dai_ops acp3x_i2s_dai_ops = {
 253         .hw_params = acp3x_i2s_hwparams,
 254         .trigger = acp3x_i2s_trigger,
 255         .set_fmt = acp3x_i2s_set_fmt,
 256         .set_tdm_slot = acp3x_i2s_set_tdm_slot,
 257 };
 258
 259 static const struct snd_soc_component_driver acp3x_dai_component = {
 260         .name           = DRV_NAME,
 261 };
 262
 263 static struct snd_soc_dai_driver acp3x_i2s_dai = {
 264         .playback = {
 265                 .rates = SNDRV_PCM_RATE_8000_96000,
 266                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
 267                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
 268                 .channels_min = 2,
 269                 .channels_max = 8,
 270                 .rate_min = 8000,
 271                 .rate_max = 96000,
 272         },
 273         .capture = {
 274                 .rates = SNDRV_PCM_RATE_8000_48000,
 275                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
 276                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
 277                 .channels_min = 2,
 278                 .channels_max = 2,
 279                 .rate_min = 8000,
 280                 .rate_max = 48000,
 281         },
 282         .ops = &acp3x_i2s_dai_ops,
 283 };
 284
 285 static int acp3x_dai_probe(struct platform_device *pdev)
 286 {
 287         struct resource *res;
 288         struct i2s_dev_data *adata;
 289         int ret;
 290
 291         adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
 292                         GFP_KERNEL);
 293         if (!adata)
 294                 return -ENOMEM;
 295
 296         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 297         if (!res) {
 298                 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
 299                 return -ENOMEM;
 300         }
 301         adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
 302                                                 resource_size(res));
 303         if (!adata->acp3x_base)
 304                 return -ENOMEM;
 305
 306         adata->i2s_irq = res->start;
 307         dev_set_drvdata(&pdev->dev, adata);
 308         ret = devm_snd_soc_register_component(&pdev->dev,
 309                         &acp3x_dai_component, &acp3x_i2s_dai, 1);
 310         if (ret) {
 311                 dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
 312                 return -ENODEV;
 313         }
 314         return 0;
 315 }
 316
 317 static int acp3x_dai_remove(struct platform_device *pdev)
 318 {
 319         /* As we use devm_ memory alloc there is nothing TBD here */
 320
 321         return 0;
 322 }
 323
 324 static struct platform_driver acp3x_dai_driver = {
 325         .probe = acp3x_dai_probe,
 326         .remove = acp3x_dai_remove,
 327         .driver = {
 328                 .name = "acp3x_i2s_playcap",
 329         },
 330 };
 331
 332 module_platform_driver(acp3x_dai_driver);
 333
 334 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
 335 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
 336 MODULE_LICENSE("GPL v2");
 337 MODULE_ALIAS("platform:"DRV_NAME);