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.hdr.cmd, 151 &stream, sizeof(stream), 152 &reply, sizeof(reply)); 153 if (!ret) 154 spcm->prepared[cstream->direction] = false; 155 } 156 157 cancel_work_sync(&spcm->stream[cstream->direction].period_elapsed_work); 158 spcm->stream[cstream->direction].cstream = NULL; 159 kfree(tstamp); 160 161 return ret; 162 } 163 164 static int sof_compr_set_params(struct snd_soc_component *component, 165 struct snd_compr_stream *cstream, struct snd_compr_params *params) 166 { 167 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 168 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 169 struct snd_compr_runtime *crtd = cstream->runtime; 170 struct sof_ipc_pcm_params_reply ipc_params_reply; 171 struct snd_compr_tstamp *tstamp; 172 struct sof_ipc_pcm_params pcm; 173 struct snd_sof_pcm *spcm; 174 int ret; 175 176 tstamp = crtd->private_data; 177 178 spcm = snd_sof_find_spcm_dai(component, rtd); 179 180 if (!spcm) 181 return -EINVAL; 182 183 cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG; 184 cstream->dma_buffer.dev.dev = sdev->dev; 185 ret = snd_compr_malloc_pages(cstream, crtd->buffer_size); 186 if (ret < 0) 187 return ret; 188 189 ret = create_page_table(component, cstream, crtd->dma_area, crtd->dma_bytes); 190 if (ret < 0) 191 return ret; 192 193 memset(&pcm, 0, sizeof(pcm)); 194 195 pcm.params.buffer.pages = PFN_UP(crtd->dma_bytes); 196 pcm.hdr.size = sizeof(pcm); 197 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS; 198 199 pcm.comp_id = spcm->stream[cstream->direction].comp_id; 200 pcm.params.hdr.size = sizeof(pcm.params); 201 pcm.params.buffer.phy_addr = spcm->stream[cstream->direction].page_table.addr; 202 pcm.params.buffer.size = crtd->dma_bytes; 203 pcm.params.direction = cstream->direction; 204 pcm.params.channels = params->codec.ch_out; 205 pcm.params.rate = params->codec.sample_rate; 206 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED; 207 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE; 208 pcm.params.sample_container_bytes = 209 snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32) >> 3; 210 pcm.params.host_period_bytes = params->buffer.fragment_size; 211 212 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm), 213 &ipc_params_reply, sizeof(ipc_params_reply)); 214 if (ret < 0) { 215 dev_err(component->dev, "error ipc failed\n"); 216 return ret; 217 } 218 219 tstamp->byte_offset = sdev->stream_box.offset + ipc_params_reply.posn_offset; 220 tstamp->sampling_rate = params->codec.sample_rate; 221 222 spcm->prepared[cstream->direction] = true; 223 224 return 0; 225 } 226 227 static int sof_compr_get_params(struct snd_soc_component *component, 228 struct snd_compr_stream *cstream, struct snd_codec *params) 229 { 230 /* TODO: we don't query the supported codecs for now, if the 231 * application asks for an unsupported codec the set_params() will fail. 232 */ 233 return 0; 234 } 235 236 static int sof_compr_trigger(struct snd_soc_component *component, 237 struct snd_compr_stream *cstream, int cmd) 238 { 239 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component); 240 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 241 struct sof_ipc_stream stream; 242 struct sof_ipc_reply reply; 243 struct snd_sof_pcm *spcm; 244 245 spcm = snd_sof_find_spcm_dai(component, rtd); 246 if (!spcm) 247 return -EINVAL; 248 249 stream.hdr.size = sizeof(stream); 250 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG; 251 stream.comp_id = spcm->stream[cstream->direction].comp_id; 252 253 switch (cmd) { 254 case SNDRV_PCM_TRIGGER_START: 255 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START; 256 break; 257 case SNDRV_PCM_TRIGGER_STOP: 258 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP; 259 break; 260 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 261 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE; 262 break; 263 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 264 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE; 265 break; 266 default: 267 dev_err(component->dev, "error: unhandled trigger cmd %d\n", cmd); 268 break; 269 } 270 271 return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, 272 &stream, sizeof(stream), 273 &reply, sizeof(reply)); 274 } 275 276 static int sof_compr_copy(struct snd_soc_component *component, 277 struct snd_compr_stream *cstream, 278 char __user *buf, size_t count) 279 { 280 struct snd_compr_runtime *rtd = cstream->runtime; 281 unsigned int offset, n; 282 void *ptr; 283 int ret; 284 285 if (count > rtd->buffer_size) 286 count = rtd->buffer_size; 287 288 div_u64_rem(rtd->total_bytes_available, rtd->buffer_size, &offset); 289 ptr = rtd->dma_area + offset; 290 n = rtd->buffer_size - offset; 291 292 if (count < n) { 293 ret = copy_from_user(ptr, buf, count); 294 } else { 295 ret = copy_from_user(ptr, buf, n); 296 ret += copy_from_user(rtd->dma_area, buf + n, count - n); 297 } 298 299 return count - ret; 300 } 301 302 static int sof_compr_pointer(struct snd_soc_component *component, 303 struct snd_compr_stream *cstream, 304 struct snd_compr_tstamp *tstamp) 305 { 306 struct snd_compr_tstamp *pstamp = cstream->runtime->private_data; 307 308 tstamp->sampling_rate = pstamp->sampling_rate; 309 tstamp->copied_total = pstamp->copied_total; 310 311 return 0; 312 } 313 314 struct snd_compress_ops sof_compressed_ops = { 315 .open = sof_compr_open, 316 .free = sof_compr_free, 317 .set_params = sof_compr_set_params, 318 .get_params = sof_compr_get_params, 319 .trigger = sof_compr_trigger, 320 .pointer = sof_compr_pointer, 321 .copy = sof_compr_copy, 322 }; 323 EXPORT_SYMBOL(sof_compressed_ops); 324