sound/soc/ux500/ux500_pcm.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2012
   3  *
   4  * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
   5  *         Roger Nilsson <roger.xr.nilsson@stericsson.com>
   6  *         for ST-Ericsson.
   7  *
   8  * License terms:
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as published
  12  * by the Free Software Foundation.
  13  */
  14
  15 #include <asm/page.h>
  16
  17 #include <linux/module.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/dmaengine.h>
  20 #include <linux/slab.h>
  21
  22 #include <plat/ste_dma40.h>
  23
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/dmaengine_pcm.h>
  28
  29 #include "ux500_msp_i2s.h"
  30 #include "ux500_pcm.h"
  31
  32 static struct snd_pcm_hardware ux500_pcm_hw_playback = {
  33         .info = SNDRV_PCM_INFO_INTERLEAVED |
  34                 SNDRV_PCM_INFO_MMAP |
  35                 SNDRV_PCM_INFO_RESUME |
  36                 SNDRV_PCM_INFO_PAUSE,
  37         .formats = SNDRV_PCM_FMTBIT_S16_LE |
  38                 SNDRV_PCM_FMTBIT_U16_LE |
  39                 SNDRV_PCM_FMTBIT_S16_BE |
  40                 SNDRV_PCM_FMTBIT_U16_BE,
  41         .rates = SNDRV_PCM_RATE_KNOT,
  42         .rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK,
  43         .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK,
  44         .channels_min = UX500_PLATFORM_MIN_CHANNELS,
  45         .channels_max = UX500_PLATFORM_MAX_CHANNELS,
  46         .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
  47         .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
  48         .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
  49         .periods_min = UX500_PLATFORM_PERIODS_MIN,
  50         .periods_max = UX500_PLATFORM_PERIODS_MAX,
  51 };
  52
  53 static struct snd_pcm_hardware ux500_pcm_hw_capture = {
  54         .info = SNDRV_PCM_INFO_INTERLEAVED |
  55                 SNDRV_PCM_INFO_MMAP |
  56                 SNDRV_PCM_INFO_RESUME |
  57                 SNDRV_PCM_INFO_PAUSE,
  58         .formats = SNDRV_PCM_FMTBIT_S16_LE |
  59                 SNDRV_PCM_FMTBIT_U16_LE |
  60                 SNDRV_PCM_FMTBIT_S16_BE |
  61                 SNDRV_PCM_FMTBIT_U16_BE,
  62         .rates = SNDRV_PCM_RATE_KNOT,
  63         .rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE,
  64         .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE,
  65         .channels_min = UX500_PLATFORM_MIN_CHANNELS,
  66         .channels_max = UX500_PLATFORM_MAX_CHANNELS,
  67         .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
  68         .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
  69         .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
  70         .periods_min = UX500_PLATFORM_PERIODS_MIN,
  71         .periods_max = UX500_PLATFORM_PERIODS_MAX,
  72 };
  73
  74 static void ux500_pcm_dma_hw_free(struct device *dev,
  75                                 struct snd_pcm_substream *substream)
  76 {
  77         struct snd_pcm_runtime *runtime = substream->runtime;
  78         struct snd_dma_buffer *buf = runtime->dma_buffer_p;
  79
  80         if (runtime->dma_area == NULL)
  81                 return;
  82
  83         if (buf != &substream->dma_buffer) {
  84                 dma_free_coherent(buf->dev.dev, buf->bytes, buf->area,
  85                                 buf->addr);
  86                 kfree(runtime->dma_buffer_p);
  87         }
  88
  89         snd_pcm_set_runtime_buffer(substream, NULL);
  90 }
  91
  92 static int ux500_pcm_open(struct snd_pcm_substream *substream)
  93 {
  94         int stream_id = substream->pstr->stream;
  95         struct snd_pcm_runtime *runtime = substream->runtime;
  96         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  97         struct snd_soc_dai *dai = rtd->cpu_dai;
  98         struct device *dev = dai->dev;
  99         int ret;
 100         struct ux500_msp_dma_params *dma_params;
 101         u16 per_data_width, mem_data_width;
 102         struct stedma40_chan_cfg *dma_cfg;
 103
 104         dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
 105                 snd_pcm_stream_str(substream));
 106
 107         dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__);
 108         if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
 109                 snd_soc_set_runtime_hwparams(substream,
 110                                         &ux500_pcm_hw_playback);
 111         else
 112                 snd_soc_set_runtime_hwparams(substream,
 113                                         &ux500_pcm_hw_capture);
 114
 115         /* ensure that buffer size is a multiple of period size */
 116         ret = snd_pcm_hw_constraint_integer(runtime,
 117                                         SNDRV_PCM_HW_PARAM_PERIODS);
 118         if (ret < 0) {
 119                 dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n",
 120                         __func__, ret);
 121                 return ret;
 122         }
 123
 124         dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__,
 125                 snd_pcm_stream_str(substream));
 126         runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ?
 127                 ux500_pcm_hw_playback : ux500_pcm_hw_capture;
 128
 129         mem_data_width = STEDMA40_HALFWORD_WIDTH;
 130
 131         dma_params = snd_soc_dai_get_dma_data(dai, substream);
 132         switch (dma_params->data_size) {
 133         case 32:
 134                 per_data_width = STEDMA40_WORD_WIDTH;
 135                 break;
 136         case 16:
 137                 per_data_width = STEDMA40_HALFWORD_WIDTH;
 138                 break;
 139         case 8:
 140                 per_data_width = STEDMA40_BYTE_WIDTH;
 141                 break;
 142         default:
 143                 per_data_width = STEDMA40_WORD_WIDTH;
 144                 dev_warn(rtd->platform->dev,
 145                         "%s: Unknown data-size (%d)! Assuming 32 bits.\n",
 146                         __func__, dma_params->data_size);
 147         }
 148
 149         dma_cfg = dma_params->dma_cfg;
 150
 151         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 152                 dma_cfg->src_info.data_width = mem_data_width;
 153                 dma_cfg->dst_info.data_width = per_data_width;
 154         } else {
 155                 dma_cfg->src_info.data_width = per_data_width;
 156                 dma_cfg->dst_info.data_width = mem_data_width;
 157         }
 158
 159
 160         ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg);
 161         if (ret) {
 162                 dev_dbg(dai->dev,
 163                         "%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n",
 164                         __func__, ret);
 165                 return ret;
 166         }
 167
 168         snd_dmaengine_pcm_set_data(substream, dma_cfg);
 169
 170         return 0;
 171 }
 172
 173 static int ux500_pcm_close(struct snd_pcm_substream *substream)
 174 {
 175         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 176         struct snd_soc_dai *dai = rtd->cpu_dai;
 177
 178         dev_dbg(dai->dev, "%s: Enter\n", __func__);
 179
 180         snd_dmaengine_pcm_close(substream);
 181
 182         return 0;
 183 }
 184
 185 static int ux500_pcm_hw_params(struct snd_pcm_substream *substream,
 186                         struct snd_pcm_hw_params *hw_params)
 187 {
 188         struct snd_pcm_runtime *runtime = substream->runtime;
 189         struct snd_dma_buffer *buf = runtime->dma_buffer_p;
 190         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 191         int ret = 0;
 192         int size;
 193
 194         dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
 195
 196         size = params_buffer_bytes(hw_params);
 197
 198         if (buf) {
 199                 if (buf->bytes >= size)
 200                         goto out;
 201                 ux500_pcm_dma_hw_free(NULL, substream);
 202         }
 203
 204         if (substream->dma_buffer.area != NULL &&
 205                 substream->dma_buffer.bytes >= size) {
 206                 buf = &substream->dma_buffer;
 207         } else {
 208                 buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL);
 209                 if (!buf)
 210                         goto nomem;
 211
 212                 buf->dev.type = SNDRV_DMA_TYPE_DEV;
 213                 buf->dev.dev = NULL;
 214                 buf->area = dma_alloc_coherent(NULL, size, &buf->addr,
 215                                         GFP_KERNEL);
 216                 buf->bytes = size;
 217                 buf->private_data = NULL;
 218
 219                 if (!buf->area)
 220                         goto free;
 221         }
 222         snd_pcm_set_runtime_buffer(substream, buf);
 223         ret = 1;
 224  out:
 225         runtime->dma_bytes = size;
 226         return ret;
 227
 228  free:
 229         kfree(buf);
 230  nomem:
 231         return -ENOMEM;
 232 }
 233
 234 static int ux500_pcm_hw_free(struct snd_pcm_substream *substream)
 235 {
 236         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 237
 238         dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
 239
 240         ux500_pcm_dma_hw_free(NULL, substream);
 241
 242         return 0;
 243 }
 244
 245 static int ux500_pcm_mmap(struct snd_pcm_substream *substream,
 246                         struct vm_area_struct *vma)
 247 {
 248         struct snd_pcm_runtime *runtime = substream->runtime;
 249         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 250
 251         dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
 252
 253         return dma_mmap_coherent(NULL, vma, runtime->dma_area,
 254                                 runtime->dma_addr, runtime->dma_bytes);
 255 }
 256
 257 static struct snd_pcm_ops ux500_pcm_ops = {
 258         .open           = ux500_pcm_open,
 259         .close          = ux500_pcm_close,
 260         .ioctl          = snd_pcm_lib_ioctl,
 261         .hw_params      = ux500_pcm_hw_params,
 262         .hw_free        = ux500_pcm_hw_free,
 263         .trigger        = snd_dmaengine_pcm_trigger,
 264         .pointer        = snd_dmaengine_pcm_pointer_no_residue,
 265         .mmap           = ux500_pcm_mmap
 266 };
 267
 268 int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd)
 269 {
 270         struct snd_pcm *pcm = rtd->pcm;
 271
 272         dev_dbg(rtd->platform->dev, "%s: Enter (id = '%s').\n", __func__,
 273                 pcm->id);
 274
 275         pcm->info_flags = 0;
 276
 277         return 0;
 278 }
 279
 280 static struct snd_soc_platform_driver ux500_pcm_soc_drv = {
 281         .ops            = &ux500_pcm_ops,
 282         .pcm_new        = ux500_pcm_new,
 283 };
 284
 285 static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev)
 286 {
 287         int ret;
 288
 289         ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv);
 290         if (ret < 0) {
 291                 dev_err(&pdev->dev,
 292                         "%s: ERROR: Failed to register platform '%s' (%d)!\n",
 293                         __func__, pdev->name, ret);
 294                 return ret;
 295         }
 296
 297         return 0;
 298 }
 299
 300 static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev)
 301 {
 302         snd_soc_unregister_platform(&pdev->dev);
 303
 304         return 0;
 305 }
 306
 307 static struct platform_driver ux500_pcm_driver = {
 308         .driver = {
 309                 .name = "ux500-pcm",
 310                 .owner = THIS_MODULE,
 311         },
 312
 313         .probe = ux500_pcm_drv_probe,
 314         .remove = __devexit_p(ux500_pcm_drv_remove),
 315 };
 316 module_platform_driver(ux500_pcm_driver);
 317
 318 MODULE_LICENSE("GPL v2");