1 // SPDX-License-Identifier: (GPL-2.0 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 "../ops.h" 21 #include "hda.h" 22 23 #define SDnFMT_BASE(x) ((x) << 14) 24 #define SDnFMT_MULT(x) (((x) - 1) << 11) 25 #define SDnFMT_DIV(x) (((x) - 1) << 8) 26 #define SDnFMT_BITS(x) ((x) << 4) 27 #define SDnFMT_CHAN(x) ((x) << 0) 28 29 static inline u32 get_mult_div(struct snd_sof_dev *sdev, int rate) 30 { 31 switch (rate) { 32 case 8000: 33 return SDnFMT_DIV(6); 34 case 9600: 35 return SDnFMT_DIV(5); 36 case 11025: 37 return SDnFMT_BASE(1) | SDnFMT_DIV(4); 38 case 16000: 39 return SDnFMT_DIV(3); 40 case 22050: 41 return SDnFMT_BASE(1) | SDnFMT_DIV(2); 42 case 32000: 43 return SDnFMT_DIV(3) | SDnFMT_MULT(2); 44 case 44100: 45 return SDnFMT_BASE(1); 46 case 48000: 47 return 0; 48 case 88200: 49 return SDnFMT_BASE(1) | SDnFMT_MULT(2); 50 case 96000: 51 return SDnFMT_MULT(2); 52 case 176400: 53 return SDnFMT_BASE(1) | SDnFMT_MULT(4); 54 case 192000: 55 return SDnFMT_MULT(4); 56 default: 57 dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n", 58 rate); 59 return 0; /* use 48KHz if not found */ 60 } 61 }; 62 63 static inline u32 get_bits(struct snd_sof_dev *sdev, int sample_bits) 64 { 65 switch (sample_bits) { 66 case 8: 67 return SDnFMT_BITS(0); 68 case 16: 69 return SDnFMT_BITS(1); 70 case 20: 71 return SDnFMT_BITS(2); 72 case 24: 73 return SDnFMT_BITS(3); 74 case 32: 75 return SDnFMT_BITS(4); 76 default: 77 dev_warn(sdev->dev, "can't find %d bits using 16bit\n", 78 sample_bits); 79 return SDnFMT_BITS(1); /* use 16bits format if not found */ 80 } 81 }; 82 83 int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev, 84 struct snd_pcm_substream *substream, 85 struct snd_pcm_hw_params *params, 86 struct sof_ipc_stream_params *ipc_params) 87 { 88 struct hdac_stream *hstream = substream->runtime->private_data; 89 struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream); 90 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 91 struct snd_dma_buffer *dmab; 92 struct sof_ipc_fw_version *v = &sdev->fw_ready.version; 93 int ret; 94 u32 size, rate, bits; 95 96 size = params_buffer_bytes(params); 97 rate = get_mult_div(sdev, params_rate(params)); 98 bits = get_bits(sdev, params_width(params)); 99 100 hstream->substream = substream; 101 102 dmab = substream->runtime->dma_buffer_p; 103 104 hstream->format_val = rate | bits | (params_channels(params) - 1); 105 hstream->bufsize = size; 106 hstream->period_bytes = params_period_bytes(params); 107 hstream->no_period_wakeup = 108 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 109 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 110 111 ret = hda_dsp_stream_hw_params(sdev, stream, dmab, params); 112 if (ret < 0) { 113 dev_err(sdev->dev, "error: hdac prepare failed: %x\n", ret); 114 return ret; 115 } 116 117 /* disable SPIB, to enable buffer wrap for stream */ 118 hda_dsp_stream_spib_config(sdev, stream, HDA_DSP_SPIB_DISABLE, 0); 119 120 /* update no_stream_position flag for ipc params */ 121 if (hda && hda->no_ipc_position) { 122 /* For older ABIs set host_period_bytes to zero to inform 123 * FW we don't want position updates. Newer versions use 124 * no_stream_position for this purpose. 125 */ 126 if (v->abi_version < SOF_ABI_VER(3, 10, 0)) 127 ipc_params->host_period_bytes = 0; 128 else 129 ipc_params->no_stream_position = 1; 130 } 131 132 ipc_params->stream_tag = hstream->stream_tag; 133 134 return 0; 135 } 136 137 int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev, 138 struct snd_pcm_substream *substream, int cmd) 139 { 140 struct hdac_stream *hstream = substream->runtime->private_data; 141 struct hdac_ext_stream *stream = stream_to_hdac_ext_stream(hstream); 142 143 return hda_dsp_stream_trigger(sdev, stream, cmd); 144 } 145 146 snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev, 147 struct snd_pcm_substream *substream) 148 { 149 struct snd_soc_pcm_runtime *rtd = substream->private_data; 150 struct hdac_stream *hstream = substream->runtime->private_data; 151 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; 152 struct snd_sof_pcm *spcm; 153 snd_pcm_uframes_t pos; 154 155 spcm = snd_sof_find_spcm_dai(sdev, rtd); 156 if (!spcm) { 157 dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n", 158 rtd->dai_link->id); 159 return 0; 160 } 161 162 if (hda && !hda->no_ipc_position) { 163 /* read position from IPC position */ 164 pos = spcm->stream[substream->stream].posn.host_posn; 165 goto found; 166 } 167 168 /* 169 * DPIB/posbuf position mode: 170 * For Playback, Use DPIB register from HDA space which 171 * reflects the actual data transferred. 172 * For Capture, Use the position buffer for pointer, as DPIB 173 * is not accurate enough, its update may be completed 174 * earlier than the data written to DDR. 175 */ 176 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 177 pos = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, 178 AZX_REG_VS_SDXDPIB_XBASE + 179 (AZX_REG_VS_SDXDPIB_XINTERVAL * 180 hstream->index)); 181 } else { 182 /* 183 * For capture stream, we need more workaround to fix the 184 * position incorrect issue: 185 * 186 * 1. Wait at least 20us before reading position buffer after 187 * the interrupt generated(IOC), to make sure position update 188 * happens on frame boundary i.e. 20.833uSec for 48KHz. 189 * 2. Perform a dummy Read to DPIB register to flush DMA 190 * position value. 191 * 3. Read the DMA Position from posbuf. Now the readback 192 * value should be >= period boundary. 193 */ 194 usleep_range(20, 21); 195 snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, 196 AZX_REG_VS_SDXDPIB_XBASE + 197 (AZX_REG_VS_SDXDPIB_XINTERVAL * 198 hstream->index)); 199 pos = snd_hdac_stream_get_pos_posbuf(hstream); 200 } 201 202 if (pos >= hstream->bufsize) 203 pos = 0; 204 205 found: 206 pos = bytes_to_frames(substream->runtime, pos); 207 208 dev_vdbg(sdev->dev, "PCM: stream %d dir %d position %lu\n", 209 hstream->index, substream->stream, pos); 210 return pos; 211 } 212 213 int hda_dsp_pcm_open(struct snd_sof_dev *sdev, 214 struct snd_pcm_substream *substream) 215 { 216 struct hdac_ext_stream *dsp_stream; 217 int direction = substream->stream; 218 219 dsp_stream = hda_dsp_stream_get(sdev, direction); 220 221 if (!dsp_stream) { 222 dev_err(sdev->dev, "error: no stream available\n"); 223 return -ENODEV; 224 } 225 226 /* binding pcm substream to hda stream */ 227 substream->runtime->private_data = &dsp_stream->hstream; 228 return 0; 229 } 230 231 int hda_dsp_pcm_close(struct snd_sof_dev *sdev, 232 struct snd_pcm_substream *substream) 233 { 234 struct hdac_stream *hstream = substream->runtime->private_data; 235 int direction = substream->stream; 236 int ret; 237 238 ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag); 239 240 if (ret) { 241 dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name); 242 return -ENODEV; 243 } 244 245 /* unbinding pcm substream to hda stream */ 246 substream->runtime->private_data = NULL; 247 return 0; 248 } 249