LXR linux/sound/soc/sof/intel/hda-pcm.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) 2018 Intel Corporation. All rights reserved.
   7//
   8// Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
   9//          Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
  10//          Rander Wang <rander.wang@intel.com>
  11//          Keyon Jie <yang.jie@linux.intel.com>
  12//
  13
  14/*
  15 * Hardware interface for generic Intel audio DSP HDA IP
  16 */
  17
  18#include <sound/hda_register.h>
  19#include <sound/pcm_params.h>
  20#include "../sof-audio.h"
  21#include "../ops.h"
  22#include "hda.h"
  23
  24#define SDnFMT_BASE(x)  ((x) << 14)
  25#define SDnFMT_MULT(x)  (((x) - 1) << 11)
  26#define SDnFMT_DIV(x)   (((x) - 1) << 8)
  27#define SDnFMT_BITS(x)  ((x) << 4)
  28#define SDnFMT_CHAN(x)  ((x) << 0)
  29
  30u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
  31{
  32        switch (rate) {
  33        case 8000:
  34                return SDnFMT_DIV(6);
  35        case 9600:
  36                return SDnFMT_DIV(5);
  37        case 11025:
  38                return SDnFMT_BASE(1) | SDnFMT_DIV(4);
  39        case 16000:
  40                return SDnFMT_DIV(3);
  41        case 22050:
  42                return SDnFMT_BASE(1) | SDnFMT_DIV(2);
  43        case 32000:
  44                return SDnFMT_DIV(3) | SDnFMT_MULT(2);
  45        case 44100:
  46                return SDnFMT_BASE(1);
  47        case 48000:
  48                return 0;
  49        case 88200:
  50                return SDnFMT_BASE(1) | SDnFMT_MULT(2);
  51        case 96000:
  52                return SDnFMT_MULT(2);
  53        case 176400:
  54                return SDnFMT_BASE(1) | SDnFMT_MULT(4);
  55        case 192000:
  56                return SDnFMT_MULT(4);
  57        default:
  58                dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
  59                         rate);
  60                return 0; /* use 48KHz if not found */
  61        }
  62};
  63
  64u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
  65{
  66        switch (sample_bits) {
  67        case 8:
  68                return SDnFMT_BITS(0);
  69        case 16:
  70                return SDnFMT_BITS(1);
  71        case 20:
  72                return SDnFMT_BITS(2);
  73        case 24:
  74                return SDnFMT_BITS(3);
  75        case 32:
  76                return SDnFMT_BITS(4);
  77        default:
  78                dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
  79                         sample_bits);
  80                return SDnFMT_BITS(1); /* use 16bits format if not found */
  81        }
  82};
  83
  84int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
  85                          struct snd_pcm_substream *substream,
  86                          struct snd_pcm_hw_params *params,
  87                          struct sof_ipc_stream_params *ipc_params)
  88{
  89        struct hdac_stream *hstream = substream->runtime->private_data;
  90        struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream);
  91        struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
  92        struct snd_dma_buffer *dmab;
  93        struct sof_ipc_fw_version *v = &sdev->fw_ready.version;
  94        int ret;
  95        u32 size, rate, bits;
  96
  97        size = params_buffer_bytes(params);
  98        rate = hda_dsp_get_mult_div(sdev, params_rate(params));
  99        bits = hda_dsp_get_bits(sdev, params_width(params));
 100
 101        hstream->substream = substream;
 102
 103        dmab = substream->runtime->dma_buffer_p;
 104
 105        hstream->format_val = rate | bits | (params_channels(params) - 1);
 106        hstream->bufsize = size;
 107        hstream->period_bytes = params_period_bytes(params);
 108        hstream->no_period_wakeup  =
 109                        (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 110                        (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 111
 112        ret = hda_dsp_stream_hw_params(sdev, stream, dmab, params);
 113        if (ret < 0) {
 114                dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret);
 115                return ret;
 116        }
 117
 118        /* disable SPIB, to enable buffer wrap for stream */
 119        hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0);
 120
 121        /* update no_stream_position flag for ipc params */
 122        if (hda && hda->no_ipc_position) {
 123                /* For older ABIs set host_period_bytes to zero to inform
 124                 * FW we don't want position updates. Newer versions use
 125                 * no_stream_position for this purpose.
 126                 */
 127                if (v->abi_version < SOF_ABI_VER(3, 10, 0))
 128                        ipc_params->host_period_bytes = 0;
 129                else
 130                        ipc_params->no_stream_position = 1;
 131        }
 132
 133        ipc_params->stream_tag = hstream->stream_tag;
 134
 135        return 0;
 136}
 137
 138int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
 139                        struct snd_pcm_substream *substream, int cmd)
 140{
 141        struct hdac_stream *hstream = substream->runtime->private_data;
 142        struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream);
 143
 144        return hda_dsp_stream_trigger(sdev, stream, cmd);
 145}
 146
 147snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
 148                                      struct snd_pcm_substream *substream)
 149{
 150        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 151        struct snd_soc_component *scomp = sdev->component;
 152        struct hdac_stream *hstream = substream->runtime->private_data;
 153        struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
 154        struct snd_sof_pcm *spcm;
 155        snd_pcm_uframes_t pos;
 156
 157        spcm = snd_sof_find_spcm_dai(scomp, rtd);
 158        if (!spcm) {
 159                dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
 160                                     rtd->dai_link->id);
 161                return 0;
 162        }
 163
 164        if (hda && !hda->no_ipc_position) {
 165                /* read position from IPC position */
 166                pos = spcm->stream[substream->stream].posn.host_posn;
 167                goto found;
 168        }
 169
 170        /*
 171         * DPIB/posbuf position mode:
 172         * For Playback, Use DPIB register from HDA space which
 173         * reflects the actual data transferred.
 174         * For Capture, Use the position buffer for pointer, as DPIB
 175         * is not accurate enough, its update may be completed
 176         * earlier than the data written to DDR.
 177         */
 178        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 179                pos = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
 180                                       AZX_REG_VS_SDXDPIB_XBASE +
 181                                       (AZX_REG_VS_SDXDPIB_XINTERVAL *
 182                                        hstream->index));
 183        } else {
 184                /*
 185                 * For capture stream, we need more workaround to fix the
 186                 * position incorrect issue:
 187                 *
 188                 * 1. Wait at least 20us before reading position buffer after
 189                 * the interrupt generated(IOC), to make sure position update
 190                 * happens on frame boundary i.e. 20.833uSec for 48KHz.
 191                 * 2. Perform a dummy Read to DPIB register to flush DMA
 192                 * position value.
 193                 * 3. Read the DMA Position from posbuf. Now the readback
 194                 * value should be >= period boundary.
 195                 */
 196                usleep_range(20, 21);
 197                snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR,
 198                                 AZX_REG_VS_SDXDPIB_XBASE +
 199                                 (AZX_REG_VS_SDXDPIB_XINTERVAL *
 200                                  hstream->index));
 201                pos = snd_hdac_stream_get_pos_posbuf(hstream);
 202        }
 203
 204        if (pos >= hstream->bufsize)
 205                pos = 0;
 206
 207found:
 208        pos = bytes_to_frames(substream->runtime, pos);
 209
 210        dev_vdbg(sdev->dev, "PCM: stream %d dir %d position %lu\n",
 211                 hstream->index, substream->stream, pos);
 212        return pos;
 213}
 214
 215int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
 216                     struct snd_pcm_substream *substream)
 217{
 218        struct hdac_ext_stream *dsp_stream;
 219        int direction = substream->stream;
 220
 221        dsp_stream = hda_dsp_stream_get(sdev, direction);
 222
 223        if (!dsp_stream) {
 224                dev_err(sdev->dev, "error: no stream available\n");
 225                return -ENODEV;
 226        }
 227
 228        /* binding pcm substream to hda stream */
 229        substream->runtime->private_data = &dsp_stream->hstream;
 230        return 0;
 231}
 232
 233int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
 234                      struct snd_pcm_substream *substream)
 235{
 236        struct hdac_stream *hstream = substream->runtime->private_data;
 237        int direction = substream->stream;
 238        int ret;
 239
 240        ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
 241
 242        if (ret) {
 243                dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
 244                return -ENODEV;
 245        }
 246
 247        /* unbinding pcm substream to hda stream */
 248        substream->runtime->private_data = NULL;
 249        return 0;
 250}
 251