1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // Copyright 2021 NXP 4 // 5 // Author: Daniel Baluta <daniel.baluta@nxp.com> 6 7 #include <sound/soc.h> 8 #include <sound/sof.h> 9 #include <sound/compress_driver.h> 10 #include "sof-audio.h" 11 #include "sof-priv.h" 12 #include "sof-utils.h" 13 14 static void sof_set_transferred_bytes(struct snd_compr_tstamp *tstamp, 15 u64 host_pos, u64 buffer_size) 16 { 17 u64 prev_pos; 18 unsigned int copied; 19 20 div64_u64_rem(tstamp->copied_total, buffer_size, &prev_pos); 21 22 if (host_pos < prev_pos) 23 copied = (buffer_size - prev_pos) + host_pos; 24 else 25 copied = host_pos - prev_pos; 26 27 tstamp->copied_total += copied; 28 } 29 30 static void snd_sof_compr_fragment_elapsed_work(struct work_struct *work) 31 { 32 struct snd_sof_pcm_stream *sps = 33 container_of(work, struct snd_sof_pcm_stream, 34 period_elapsed_work); 35 36 snd_compr_fragment_elapsed(sps->cstream); 37 } 38 39 void snd_sof_compr_init_elapsed_work(struct work_struct *work) 40 { 41 INIT_WORK(work, snd_sof_compr_fragment_elapsed_work); 42 } 43 44 /* 45 * sof compr fragment elapse, this could be called in irq thread context 46 */ 47 void snd_sof_compr_fragment_elapsed(struct snd_compr_stream *cstream) 48 { 49 struct snd_soc_pcm_runtime *rtd; 50 struct snd_compr_runtime *crtd; 51 struct snd_soc_component *component; 52 struct snd_compr_tstamp *tstamp; 53 struct snd_sof_pcm *spcm; 54 55 if (!cstream) 56 return; 57 58 rtd = cstream->private_data; 59 crtd = cstream->runtime; 60 tstamp = crtd->private_data; 61 component = snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME); 62 63 spcm = snd_sof_find_spcm_dai(component, rtd); 64 if (!spcm) { 65 dev_err(component->dev, 66 "fragment elapsed called for unknown stream!\n"); 67 return; 68 } 69 70 sof_set_transferred_bytes(tstamp, spcm->stream[cstream->direction].posn.host_posn, 71 crtd->buffer_size); 72 73 /* use the same workqueue-based solution as for PCM, cf. snd_sof_pcm_elapsed */ 74 schedule_work(&spcm->stream[cstream->direction].period_elapsed_work); 75 } 76 77 static int create_page_table(struct snd_soc_component *component, 78 struct snd_compr_stream *cstream, 79 unsigned char *dma_area, size_t size) 80 { 81 struct snd_dma_buffer *dmab = cstream->runtime->dma_buffer_p; 82 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 83 int dir = cstream->direction; 84 struct snd_sof_pcm *spcm; 85 86 spcm = snd_sof_find_spcm_dai(component, rtd); 87 if (!spcm) 88 return -EINVAL; 89 90 return snd_sof_create_page_table(component->dev, dmab, 91 spcm->stream[dir].page_table.area, size); 92 } 93 94 static int sof_compr_open(struct snd_soc_component *component, 95 struct snd_compr_stream *cstream) 96 { 97 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 98 struct snd_compr_runtime *crtd = cstream->runtime; 99 struct snd_compr_tstamp *tstamp; 100 struct snd_sof_pcm *spcm; 101 int dir; 102 103 tstamp = kzalloc(sizeof(*tstamp), GFP_KERNEL); 104 if (!tstamp) 105 return -ENOMEM; 106 107 spcm = snd_sof_find_spcm_dai(component, rtd); 108 if (!spcm) { 109 kfree(tstamp); 110 return -EINVAL; 111 } 112 113 dir = cstream->direction; 114 115 if (spcm->stream[dir].cstream) { 116 kfree(tstamp); 117 return -EBUSY; 118 } 119 120 spcm->stream[dir].cstream = cstream; 121 spcm->stream[dir].posn.host_posn = 0; 122 spcm->stream[dir].posn.dai_posn = 0; 123 spcm->prepared[dir] = false; 124 125 crtd->private_data = tstamp; 126 127 return 0; 128 } 129 130 static int sof_compr_free(struct snd_soc_component *component, 131 struct snd_compr_stream *cstream) 132 { 133 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 134 struct snd_compr_tstamp *tstamp = cstream->runtime->private_data; 135 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 136 struct sof_ipc_stream stream; 137 struct sof_ipc_reply reply; 138 struct snd_sof_pcm *spcm; 139 int ret = 0; 140 141 spcm = snd_sof_find_spcm_dai(component, rtd); 142 if (!spcm) 143 return -EINVAL; 144 145 stream.hdr.size = sizeof(stream); 146 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE; 147 stream.comp_id = spcm->stream[cstream->direction].comp_id; 148 149 if (spcm->prepared[cstream->direction]) { 150 ret = sof_ipc_tx_message(sdev->ipc, &stream, sizeof(stream), 151 &reply, sizeof(reply)); 152 if (!ret) 153 spcm->prepared[cstream->direction] = false; 154 } 155 156 cancel_work_sync(&spcm->stream[cstream->direction].period_elapsed_work); 157 spcm->stream[cstream->direction].cstream = NULL; 158 kfree(tstamp); 159 160 return ret; 161 } 162 163 static int sof_compr_set_params(struct snd_soc_component *component, 164 struct snd_compr_stream *cstream, struct snd_compr_params *params) 165 { 166 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 167 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 168 struct snd_compr_runtime *crtd = cstream->runtime; 169 struct sof_ipc_pcm_params_reply ipc_params_reply; 170 struct snd_compr_tstamp *tstamp; 171 struct sof_ipc_pcm_params pcm; 172 struct snd_sof_pcm *spcm; 173 int ret; 174 175 tstamp = crtd->private_data; 176 177 spcm = snd_sof_find_spcm_dai(component, rtd); 178 179 if (!spcm) 180 return -EINVAL; 181 182 cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG; 183 cstream->dma_buffer.dev.dev = sdev->dev; 184 ret = snd_compr_malloc_pages(cstream, crtd->buffer_size); 185 if (ret < 0) 186 return ret; 187 188 ret = create_page_table(component, cstream, crtd->dma_area, crtd->dma_bytes); 189 if (ret < 0) 190 return ret; 191 192 memset(&pcm, 0, sizeof(pcm)); 193 194 pcm.params.buffer.pages = PFN_UP(crtd->dma_bytes); 195 pcm.hdr.size = sizeof(pcm); 196 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 197 198 pcm.comp_id = spcm->stream[cstream->direction].comp_id; 199 pcm.params.hdr.size = sizeof(pcm.params); 200 pcm.params.buffer.phy_addr = spcm->stream[cstream->direction].page_table.addr; 201 pcm.params.buffer.size = crtd->dma_bytes; 202 pcm.params.direction = cstream->direction; 203 pcm.params.channels = params->codec.ch_out; 204 pcm.params.rate = params->codec.sample_rate; 205 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 206 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 207 pcm.params.sample_container_bytes = 208 snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32) >> 3; 209 pcm.params.host_period_bytes = params->buffer.fragment_size; 210 211 ret = sof_ipc_tx_message(sdev->ipc, &pcm, sizeof(pcm), 212 &ipc_params_reply, sizeof(ipc_params_reply)); 213 if (ret < 0) { 214 dev_err(component->dev, "error ipc failed\n"); 215 return ret; 216 } 217 218 tstamp->byte_offset = sdev->stream_box.offset + ipc_params_reply.posn_offset; 219 tstamp->sampling_rate = params->codec.sample_rate; 220 221 spcm->prepared[cstream->direction] = true; 222 223 return 0; 224 } 225 226 static int sof_compr_get_params(struct snd_soc_component *component, 227 struct snd_compr_stream *cstream, struct snd_codec *params) 228 { 229 /* TODO: we don't query the supported codecs for now, if the 230 * application asks for an unsupported codec the set_params() will fail. 231 */ 232 return 0; 233 } 234 235 static int sof_compr_trigger(struct snd_soc_component *component, 236 struct snd_compr_stream *cstream, int cmd) 237 { 238 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 239 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 240 struct sof_ipc_stream stream; 241 struct sof_ipc_reply reply; 242 struct snd_sof_pcm *spcm; 243 244 spcm = snd_sof_find_spcm_dai(component, rtd); 245 if (!spcm) 246 return -EINVAL; 247 248 stream.hdr.size = sizeof(stream); 249 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 250 stream.comp_id = spcm->stream[cstream->direction].comp_id; 251 252 switch (cmd) { 253 case SNDRV_PCM_TRIGGER_START: 254 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 255 break; 256 case SNDRV_PCM_TRIGGER_STOP: 257 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 258 break; 259 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 260 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 261 break; 262 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 263 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 264 break; 265 default: 266 dev_err(component->dev, "error: unhandled trigger cmd %d\n", cmd); 267 break; 268 } 269 270 return sof_ipc_tx_message(sdev->ipc, &stream, sizeof(stream), 271 &reply, sizeof(reply)); 272 } 273 274 static int sof_compr_copy(struct snd_soc_component *component, 275 struct snd_compr_stream *cstream, 276 char __user *buf, size_t count) 277 { 278 struct snd_compr_runtime *rtd = cstream->runtime; 279 unsigned int offset, n; 280 void *ptr; 281 int ret; 282 283 if (count > rtd->buffer_size) 284 count = rtd->buffer_size; 285 286 div_u64_rem(rtd->total_bytes_available, rtd->buffer_size, &offset); 287 ptr = rtd->dma_area + offset; 288 n = rtd->buffer_size - offset; 289 290 if (count < n) { 291 ret = copy_from_user(ptr, buf, count); 292 } else { 293 ret = copy_from_user(ptr, buf, n); 294 ret += copy_from_user(rtd->dma_area, buf + n, count - n); 295 } 296 297 return count - ret; 298 } 299 300 static int sof_compr_pointer(struct snd_soc_component *component, 301 struct snd_compr_stream *cstream, 302 struct snd_compr_tstamp *tstamp) 303 { 304 struct snd_compr_tstamp *pstamp = cstream->runtime->private_data; 305 306 tstamp->sampling_rate = pstamp->sampling_rate; 307 tstamp->copied_total = pstamp->copied_total; 308 309 return 0; 310 } 311 312 struct snd_compress_ops sof_compressed_ops = { 313 .open = sof_compr_open, 314 .free = sof_compr_free, 315 .set_params = sof_compr_set_params, 316 .get_params = sof_compr_get_params, 317 .trigger = sof_compr_trigger, 318 .pointer = sof_compr_pointer, 319 .copy = sof_compr_copy, 320 }; 321 EXPORT_SYMBOL(sof_compressed_ops); 322