sound/soc/intel/sst-mfld-platform-compress.c

   1 /*
   2  *  sst_mfld_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010-2014 Intel Corp
   5  *  Author: Vinod Koul <vinod.koul@intel.com>
   6  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; version 2 of the License.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  General Public License for more details.
  16  *
  17  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  18  */
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/slab.h>
  22 #include <linux/io.h>
  23 #include <linux/module.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28 #include <sound/compress_driver.h>
  29 #include "sst-mfld-platform.h"
  30
  31 /* compress stream operations */
  32 static void sst_compr_fragment_elapsed(void *arg)
  33 {
  34         struct snd_compr_stream *cstream = (struct snd_compr_stream *)arg;
  35
  36         pr_debug("fragment elapsed by driver\n");
  37         if (cstream)
  38                 snd_compr_fragment_elapsed(cstream);
  39 }
  40
  41 static void sst_drain_notify(void *arg)
  42 {
  43         struct snd_compr_stream *cstream = (struct snd_compr_stream *)arg;
  44
  45         pr_debug("drain notify by driver\n");
  46         if (cstream)
  47                 snd_compr_drain_notify(cstream);
  48 }
  49
  50 static int sst_platform_compr_open(struct snd_compr_stream *cstream)
  51 {
  52
  53         int ret_val = 0;
  54         struct snd_compr_runtime *runtime = cstream->runtime;
  55         struct sst_runtime_stream *stream;
  56
  57         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
  58         if (!stream)
  59                 return -ENOMEM;
  60
  61         spin_lock_init(&stream->status_lock);
  62
  63         /* get the sst ops */
  64         if (!sst || !try_module_get(sst->dev->driver->owner)) {
  65                 pr_err("no device available to run\n");
  66                 ret_val = -ENODEV;
  67                 goto out_ops;
  68         }
  69         stream->compr_ops = sst->compr_ops;
  70
  71         stream->id = 0;
  72         sst_set_stream_status(stream, SST_PLATFORM_INIT);
  73         runtime->private_data = stream;
  74         return 0;
  75 out_ops:
  76         kfree(stream);
  77         return ret_val;
  78 }
  79
  80 static int sst_platform_compr_free(struct snd_compr_stream *cstream)
  81 {
  82         struct sst_runtime_stream *stream;
  83         int ret_val = 0, str_id;
  84
  85         stream = cstream->runtime->private_data;
  86         /*need to check*/
  87         str_id = stream->id;
  88         if (str_id)
  89                 ret_val = stream->compr_ops->close(str_id);
  90         module_put(sst->dev->driver->owner);
  91         kfree(stream);
  92         pr_debug("%s: %d\n", __func__, ret_val);
  93         return 0;
  94 }
  95
  96 static int sst_platform_compr_set_params(struct snd_compr_stream *cstream,
  97                                         struct snd_compr_params *params)
  98 {
  99         struct sst_runtime_stream *stream;
 100         int retval;
 101         struct snd_sst_params str_params;
 102         struct sst_compress_cb cb;
 103         struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 104         struct snd_soc_platform *platform = rtd->platform;
 105         struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);
 106
 107         stream = cstream->runtime->private_data;
 108         /* construct fw structure for this*/
 109         memset(&str_params, 0, sizeof(str_params));
 110
 111         /* fill the device type and stream id to pass to SST driver */
 112         retval = sst_fill_stream_params(cstream, ctx, &str_params, true);
 113         pr_debug("compr_set_params: fill stream params ret_val = 0x%x\n", retval);
 114         if (retval < 0)
 115                 return retval;
 116
 117         switch (params->codec.id) {
 118         case SND_AUDIOCODEC_MP3: {
 119                 str_params.codec = SST_CODEC_TYPE_MP3;
 120                 str_params.sparams.uc.mp3_params.num_chan = params->codec.ch_in;
 121                 str_params.sparams.uc.mp3_params.pcm_wd_sz = 16;
 122                 break;
 123         }
 124
 125         case SND_AUDIOCODEC_AAC: {
 126                 str_params.codec = SST_CODEC_TYPE_AAC;
 127                 str_params.sparams.uc.aac_params.num_chan = params->codec.ch_in;
 128                 str_params.sparams.uc.aac_params.pcm_wd_sz = 16;
 129                 if (params->codec.format == SND_AUDIOSTREAMFORMAT_MP4ADTS)
 130                         str_params.sparams.uc.aac_params.bs_format =
 131                                                         AAC_BIT_STREAM_ADTS;
 132                 else if (params->codec.format == SND_AUDIOSTREAMFORMAT_RAW)
 133                         str_params.sparams.uc.aac_params.bs_format =
 134                                                         AAC_BIT_STREAM_RAW;
 135                 else {
 136                         pr_err("Undefined format%d\n", params->codec.format);
 137                         return -EINVAL;
 138                 }
 139                 str_params.sparams.uc.aac_params.externalsr =
 140                                                 params->codec.sample_rate;
 141                 break;
 142         }
 143
 144         default:
 145                 pr_err("codec not supported, id =%d\n", params->codec.id);
 146                 return -EINVAL;
 147         }
 148
 149         str_params.aparams.ring_buf_info[0].addr  =
 150                                         virt_to_phys(cstream->runtime->buffer);
 151         str_params.aparams.ring_buf_info[0].size =
 152                                         cstream->runtime->buffer_size;
 153         str_params.aparams.sg_count = 1;
 154         str_params.aparams.frag_size = cstream->runtime->fragment_size;
 155
 156         cb.param = cstream;
 157         cb.compr_cb = sst_compr_fragment_elapsed;
 158         cb.drain_cb_param = cstream;
 159         cb.drain_notify = sst_drain_notify;
 160
 161         retval = stream->compr_ops->open(&str_params, &cb);
 162         if (retval < 0) {
 163                 pr_err("stream allocation failed %d\n", retval);
 164                 return retval;
 165         }
 166
 167         stream->id = retval;
 168         return 0;
 169 }
 170
 171 static int sst_platform_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 172 {
 173         struct sst_runtime_stream *stream =
 174                 cstream->runtime->private_data;
 175
 176         return stream->compr_ops->control(cmd, stream->id);
 177 }
 178
 179 static int sst_platform_compr_pointer(struct snd_compr_stream *cstream,
 180                                         struct snd_compr_tstamp *tstamp)
 181 {
 182         struct sst_runtime_stream *stream;
 183
 184         stream  = cstream->runtime->private_data;
 185         stream->compr_ops->tstamp(stream->id, tstamp);
 186         tstamp->byte_offset = tstamp->copied_total %
 187                                  (u32)cstream->runtime->buffer_size;
 188         pr_debug("calc bytes offset/copied bytes as %d\n", tstamp->byte_offset);
 189         return 0;
 190 }
 191
 192 static int sst_platform_compr_ack(struct snd_compr_stream *cstream,
 193                                         size_t bytes)
 194 {
 195         struct sst_runtime_stream *stream;
 196
 197         stream  = cstream->runtime->private_data;
 198         stream->compr_ops->ack(stream->id, (unsigned long)bytes);
 199         stream->bytes_written += bytes;
 200
 201         return 0;
 202 }
 203
 204 static int sst_platform_compr_get_caps(struct snd_compr_stream *cstream,
 205                                         struct snd_compr_caps *caps)
 206 {
 207         struct sst_runtime_stream *stream =
 208                 cstream->runtime->private_data;
 209
 210         return stream->compr_ops->get_caps(caps);
 211 }
 212
 213 static int sst_platform_compr_get_codec_caps(struct snd_compr_stream *cstream,
 214                                         struct snd_compr_codec_caps *codec)
 215 {
 216         struct sst_runtime_stream *stream =
 217                 cstream->runtime->private_data;
 218
 219         return stream->compr_ops->get_codec_caps(codec);
 220 }
 221
 222 static int sst_platform_compr_set_metadata(struct snd_compr_stream *cstream,
 223                                         struct snd_compr_metadata *metadata)
 224 {
 225         struct sst_runtime_stream *stream  =
 226                  cstream->runtime->private_data;
 227
 228         return stream->compr_ops->set_metadata(stream->id, metadata);
 229 }
 230
 231 struct snd_compr_ops sst_platform_compr_ops = {
 232
 233         .open = sst_platform_compr_open,
 234         .free = sst_platform_compr_free,
 235         .set_params = sst_platform_compr_set_params,
 236         .set_metadata = sst_platform_compr_set_metadata,
 237         .trigger = sst_platform_compr_trigger,
 238         .pointer = sst_platform_compr_pointer,
 239         .ack = sst_platform_compr_ack,
 240         .get_caps = sst_platform_compr_get_caps,
 241         .get_codec_caps = sst_platform_compr_get_codec_caps,
 242 };