1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sst.c - Intel SST Driver for audio engine 4 * 5 * Copyright (C) 2008-14 Intel Corp 6 * Authors: Vinod Koul <vinod.koul@intel.com> 7 * Harsha Priya <priya.harsha@intel.com> 8 * Dharageswari R <dharageswari.r@intel.com> 9 * KP Jeeja <jeeja.kp@intel.com> 10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 * 12 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 13 */ 14 #include <linux/module.h> 15 #include <linux/fs.h> 16 #include <linux/interrupt.h> 17 #include <linux/io.h> 18 #include <linux/firmware.h> 19 #include <linux/pm_runtime.h> 20 #include <linux/pm_qos.h> 21 #include <linux/async.h> 22 #include <linux/acpi.h> 23 #include <linux/sysfs.h> 24 #include <sound/core.h> 25 #include <sound/soc.h> 26 #include <asm/platform_sst_audio.h> 27 #include "../sst-mfld-platform.h" 28 #include "sst.h" 29 #include "../../common/sst-dsp.h" 30 31 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 32 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 33 MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver"); 34 MODULE_LICENSE("GPL v2"); 35 36 static inline bool sst_is_process_reply(u32 msg_id) 37 { 38 return ((msg_id & PROCESS_MSG) ? true : false); 39 } 40 41 static inline bool sst_validate_mailbox_size(unsigned int size) 42 { 43 return ((size <= SST_MAILBOX_SIZE) ? true : false); 44 } 45 46 static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context) 47 { 48 union interrupt_reg_mrfld isr; 49 union ipc_header_mrfld header; 50 union sst_imr_reg_mrfld imr; 51 struct ipc_post *msg = NULL; 52 unsigned int size = 0; 53 struct intel_sst_drv *drv = (struct intel_sst_drv *) context; 54 irqreturn_t retval = IRQ_HANDLED; 55 56 /* Interrupt arrived, check src */ 57 isr.full = sst_shim_read64(drv->shim, SST_ISRX); 58 59 if (isr.part.done_interrupt) { 60 /* Clear done bit */ 61 spin_lock(&drv->ipc_spin_lock); 62 header.full = sst_shim_read64(drv->shim, 63 drv->ipc_reg.ipcx); 64 header.p.header_high.part.done = 0; 65 sst_shim_write64(drv->shim, drv->ipc_reg.ipcx, header.full); 66 67 /* write 1 to clear status register */; 68 isr.part.done_interrupt = 1; 69 sst_shim_write64(drv->shim, SST_ISRX, isr.full); 70 spin_unlock(&drv->ipc_spin_lock); 71 72 /* we can send more messages to DSP so trigger work */ 73 queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq); 74 retval = IRQ_HANDLED; 75 } 76 77 if (isr.part.busy_interrupt) { 78 /* message from dsp so copy that */ 79 spin_lock(&drv->ipc_spin_lock); 80 imr.full = sst_shim_read64(drv->shim, SST_IMRX); 81 imr.part.busy_interrupt = 1; 82 sst_shim_write64(drv->shim, SST_IMRX, imr.full); 83 spin_unlock(&drv->ipc_spin_lock); 84 header.full = sst_shim_read64(drv->shim, drv->ipc_reg.ipcd); 85 86 if (sst_create_ipc_msg(&msg, header.p.header_high.part.large)) { 87 drv->ops->clear_interrupt(drv); 88 return IRQ_HANDLED; 89 } 90 91 if (header.p.header_high.part.large) { 92 size = header.p.header_low_payload; 93 if (sst_validate_mailbox_size(size)) { 94 memcpy_fromio(msg->mailbox_data, 95 drv->mailbox + drv->mailbox_recv_offset, size); 96 } else { 97 dev_err(drv->dev, 98 "Mailbox not copied, payload size is: %u\n", size); 99 header.p.header_low_payload = 0; 100 } 101 } 102 103 msg->mrfld_header = header; 104 msg->is_process_reply = 105 sst_is_process_reply(header.p.header_high.part.msg_id); 106 spin_lock(&drv->rx_msg_lock); 107 list_add_tail(&msg->node, &drv->rx_list); 108 spin_unlock(&drv->rx_msg_lock); 109 drv->ops->clear_interrupt(drv); 110 retval = IRQ_WAKE_THREAD; 111 } 112 return retval; 113 } 114 115 static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context) 116 { 117 struct intel_sst_drv *drv = (struct intel_sst_drv *) context; 118 struct ipc_post *__msg, *msg = NULL; 119 unsigned long irq_flags; 120 121 spin_lock_irqsave(&drv->rx_msg_lock, irq_flags); 122 if (list_empty(&drv->rx_list)) { 123 spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags); 124 return IRQ_HANDLED; 125 } 126 127 list_for_each_entry_safe(msg, __msg, &drv->rx_list, node) { 128 list_del(&msg->node); 129 spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags); 130 if (msg->is_process_reply) 131 drv->ops->process_message(msg); 132 else 133 drv->ops->process_reply(drv, msg); 134 135 if (msg->is_large) 136 kfree(msg->mailbox_data); 137 kfree(msg); 138 spin_lock_irqsave(&drv->rx_msg_lock, irq_flags); 139 } 140 spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags); 141 return IRQ_HANDLED; 142 } 143 144 static int sst_save_dsp_context_v2(struct intel_sst_drv *sst) 145 { 146 int ret = 0; 147 148 ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD, 149 IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL, 150 true, true, false, true); 151 152 if (ret < 0) { 153 dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret); 154 return -EIO; 155 } 156 157 return 0; 158 } 159 160 161 static struct intel_sst_ops mrfld_ops = { 162 .interrupt = intel_sst_interrupt_mrfld, 163 .irq_thread = intel_sst_irq_thread_mrfld, 164 .clear_interrupt = intel_sst_clear_intr_mrfld, 165 .start = sst_start_mrfld, 166 .reset = intel_sst_reset_dsp_mrfld, 167 .post_message = sst_post_message_mrfld, 168 .process_reply = sst_process_reply_mrfld, 169 .save_dsp_context = sst_save_dsp_context_v2, 170 .alloc_stream = sst_alloc_stream_mrfld, 171 .post_download = sst_post_download_mrfld, 172 }; 173 174 int sst_driver_ops(struct intel_sst_drv *sst) 175 { 176 177 switch (sst->dev_id) { 178 case SST_MRFLD_PCI_ID: 179 case SST_BYT_ACPI_ID: 180 case SST_CHV_ACPI_ID: 181 sst->tstamp = SST_TIME_STAMP_MRFLD; 182 sst->ops = &mrfld_ops; 183 return 0; 184 185 default: 186 dev_err(sst->dev, 187 "SST Driver capabilities missing for dev_id: %x", 188 sst->dev_id); 189 return -EINVAL; 190 }; 191 } 192 193 void sst_process_pending_msg(struct work_struct *work) 194 { 195 struct intel_sst_drv *ctx = container_of(work, 196 struct intel_sst_drv, ipc_post_msg_wq); 197 198 ctx->ops->post_message(ctx, NULL, false); 199 } 200 201 static int sst_workqueue_init(struct intel_sst_drv *ctx) 202 { 203 INIT_LIST_HEAD(&ctx->memcpy_list); 204 INIT_LIST_HEAD(&ctx->rx_list); 205 INIT_LIST_HEAD(&ctx->ipc_dispatch_list); 206 INIT_LIST_HEAD(&ctx->block_list); 207 INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg); 208 init_waitqueue_head(&ctx->wait_queue); 209 210 ctx->post_msg_wq = 211 create_singlethread_workqueue("sst_post_msg_wq"); 212 if (!ctx->post_msg_wq) 213 return -EBUSY; 214 return 0; 215 } 216 217 static void sst_init_locks(struct intel_sst_drv *ctx) 218 { 219 mutex_init(&ctx->sst_lock); 220 spin_lock_init(&ctx->rx_msg_lock); 221 spin_lock_init(&ctx->ipc_spin_lock); 222 spin_lock_init(&ctx->block_lock); 223 } 224 225 int sst_alloc_drv_context(struct intel_sst_drv **ctx, 226 struct device *dev, unsigned int dev_id) 227 { 228 *ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL); 229 if (!(*ctx)) 230 return -ENOMEM; 231 232 (*ctx)->dev = dev; 233 (*ctx)->dev_id = dev_id; 234 235 return 0; 236 } 237 EXPORT_SYMBOL_GPL(sst_alloc_drv_context); 238 239 static ssize_t firmware_version_show(struct device *dev, 240 struct device_attribute *attr, char *buf) 241 { 242 struct intel_sst_drv *ctx = dev_get_drvdata(dev); 243 244 if (ctx->fw_version.type == 0 && ctx->fw_version.major == 0 && 245 ctx->fw_version.minor == 0 && ctx->fw_version.build == 0) 246 return sprintf(buf, "FW not yet loaded\n"); 247 else 248 return sprintf(buf, "v%02x.%02x.%02x.%02x\n", 249 ctx->fw_version.type, ctx->fw_version.major, 250 ctx->fw_version.minor, ctx->fw_version.build); 251 252 } 253 254 static DEVICE_ATTR_RO(firmware_version); 255 256 static const struct attribute *sst_fw_version_attrs[] = { 257 &dev_attr_firmware_version.attr, 258 NULL, 259 }; 260 261 static const struct attribute_group sst_fw_version_attr_group = { 262 .attrs = (struct attribute **)sst_fw_version_attrs, 263 }; 264 265 int sst_context_init(struct intel_sst_drv *ctx) 266 { 267 int ret = 0, i; 268 269 if (!ctx->pdata) 270 return -EINVAL; 271 272 if (!ctx->pdata->probe_data) 273 return -EINVAL; 274 275 memcpy(&ctx->info, ctx->pdata->probe_data, sizeof(ctx->info)); 276 277 ret = sst_driver_ops(ctx); 278 if (ret != 0) 279 return -EINVAL; 280 281 sst_init_locks(ctx); 282 sst_set_fw_state_locked(ctx, SST_RESET); 283 284 /* pvt_id 0 reserved for async messages */ 285 ctx->pvt_id = 1; 286 ctx->stream_cnt = 0; 287 ctx->fw_in_mem = NULL; 288 /* we use memcpy, so set to 0 */ 289 ctx->use_dma = 0; 290 ctx->use_lli = 0; 291 292 if (sst_workqueue_init(ctx)) 293 return -EINVAL; 294 295 ctx->mailbox_recv_offset = ctx->pdata->ipc_info->mbox_recv_off; 296 ctx->ipc_reg.ipcx = SST_IPCX + ctx->pdata->ipc_info->ipc_offset; 297 ctx->ipc_reg.ipcd = SST_IPCD + ctx->pdata->ipc_info->ipc_offset; 298 299 dev_info(ctx->dev, "Got drv data max stream %d\n", 300 ctx->info.max_streams); 301 302 for (i = 1; i <= ctx->info.max_streams; i++) { 303 struct stream_info *stream = &ctx->streams[i]; 304 305 memset(stream, 0, sizeof(*stream)); 306 stream->pipe_id = PIPE_RSVD; 307 mutex_init(&stream->lock); 308 } 309 310 /* Register the ISR */ 311 ret = devm_request_threaded_irq(ctx->dev, ctx->irq_num, ctx->ops->interrupt, 312 ctx->ops->irq_thread, 0, SST_DRV_NAME, 313 ctx); 314 if (ret) 315 goto do_free_mem; 316 317 dev_dbg(ctx->dev, "Registered IRQ %#x\n", ctx->irq_num); 318 319 /* default intr are unmasked so set this as masked */ 320 sst_shim_write64(ctx->shim, SST_IMRX, 0xFFFF0038); 321 322 ctx->qos = devm_kzalloc(ctx->dev, 323 sizeof(struct pm_qos_request), GFP_KERNEL); 324 if (!ctx->qos) { 325 ret = -ENOMEM; 326 goto do_free_mem; 327 } 328 pm_qos_add_request(ctx->qos, PM_QOS_CPU_DMA_LATENCY, 329 PM_QOS_DEFAULT_VALUE); 330 331 dev_dbg(ctx->dev, "Requesting FW %s now...\n", ctx->firmware_name); 332 ret = request_firmware_nowait(THIS_MODULE, true, ctx->firmware_name, 333 ctx->dev, GFP_KERNEL, ctx, sst_firmware_load_cb); 334 if (ret) { 335 dev_err(ctx->dev, "Firmware download failed:%d\n", ret); 336 goto do_free_mem; 337 } 338 339 ret = sysfs_create_group(&ctx->dev->kobj, 340 &sst_fw_version_attr_group); 341 if (ret) { 342 dev_err(ctx->dev, 343 "Unable to create sysfs\n"); 344 goto err_sysfs; 345 } 346 347 sst_register(ctx->dev); 348 return 0; 349 err_sysfs: 350 sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group); 351 352 do_free_mem: 353 destroy_workqueue(ctx->post_msg_wq); 354 return ret; 355 } 356 EXPORT_SYMBOL_GPL(sst_context_init); 357 358 void sst_context_cleanup(struct intel_sst_drv *ctx) 359 { 360 pm_runtime_get_noresume(ctx->dev); 361 pm_runtime_disable(ctx->dev); 362 sst_unregister(ctx->dev); 363 sst_set_fw_state_locked(ctx, SST_SHUTDOWN); 364 sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group); 365 flush_scheduled_work(); 366 destroy_workqueue(ctx->post_msg_wq); 367 pm_qos_remove_request(ctx->qos); 368 kfree(ctx->fw_sg_list.src); 369 kfree(ctx->fw_sg_list.dst); 370 ctx->fw_sg_list.list_len = 0; 371 kfree(ctx->fw_in_mem); 372 ctx->fw_in_mem = NULL; 373 sst_memcpy_free_resources(ctx); 374 ctx = NULL; 375 } 376 EXPORT_SYMBOL_GPL(sst_context_cleanup); 377 378 void sst_configure_runtime_pm(struct intel_sst_drv *ctx) 379 { 380 pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY); 381 pm_runtime_use_autosuspend(ctx->dev); 382 /* 383 * For acpi devices, the actual physical device state is 384 * initially active. So change the state to active before 385 * enabling the pm 386 */ 387 388 if (!acpi_disabled) 389 pm_runtime_set_active(ctx->dev); 390 391 pm_runtime_enable(ctx->dev); 392 393 if (acpi_disabled) 394 pm_runtime_set_active(ctx->dev); 395 else 396 pm_runtime_put_noidle(ctx->dev); 397 } 398 EXPORT_SYMBOL_GPL(sst_configure_runtime_pm); 399 400 static int intel_sst_runtime_suspend(struct device *dev) 401 { 402 int ret = 0; 403 struct intel_sst_drv *ctx = dev_get_drvdata(dev); 404 405 if (ctx->sst_state == SST_RESET) { 406 dev_dbg(dev, "LPE is already in RESET state, No action\n"); 407 return 0; 408 } 409 /* save fw context */ 410 if (ctx->ops->save_dsp_context(ctx)) 411 return -EBUSY; 412 413 /* Move the SST state to Reset */ 414 sst_set_fw_state_locked(ctx, SST_RESET); 415 416 synchronize_irq(ctx->irq_num); 417 flush_workqueue(ctx->post_msg_wq); 418 419 ctx->ops->reset(ctx); 420 421 return ret; 422 } 423 424 static int intel_sst_suspend(struct device *dev) 425 { 426 struct intel_sst_drv *ctx = dev_get_drvdata(dev); 427 struct sst_fw_save *fw_save; 428 int i, ret = 0; 429 430 /* check first if we are already in SW reset */ 431 if (ctx->sst_state == SST_RESET) 432 return 0; 433 434 /* 435 * check if any stream is active and running 436 * they should already by suspend by soc_suspend 437 */ 438 for (i = 1; i <= ctx->info.max_streams; i++) { 439 struct stream_info *stream = &ctx->streams[i]; 440 441 if (stream->status == STREAM_RUNNING) { 442 dev_err(dev, "stream %d is running, can't suspend, abort\n", i); 443 return -EBUSY; 444 } 445 446 if (ctx->pdata->streams_lost_on_suspend) { 447 stream->resume_status = stream->status; 448 stream->resume_prev = stream->prev; 449 if (stream->status != STREAM_UN_INIT) 450 sst_free_stream(ctx, i); 451 } 452 } 453 synchronize_irq(ctx->irq_num); 454 flush_workqueue(ctx->post_msg_wq); 455 456 /* Move the SST state to Reset */ 457 sst_set_fw_state_locked(ctx, SST_RESET); 458 459 /* tell DSP we are suspending */ 460 if (ctx->ops->save_dsp_context(ctx)) 461 return -EBUSY; 462 463 /* save the memories */ 464 fw_save = kzalloc(sizeof(*fw_save), GFP_KERNEL); 465 if (!fw_save) 466 return -ENOMEM; 467 fw_save->iram = kvzalloc(ctx->iram_end - ctx->iram_base, GFP_KERNEL); 468 if (!fw_save->iram) { 469 ret = -ENOMEM; 470 goto iram; 471 } 472 fw_save->dram = kvzalloc(ctx->dram_end - ctx->dram_base, GFP_KERNEL); 473 if (!fw_save->dram) { 474 ret = -ENOMEM; 475 goto dram; 476 } 477 fw_save->sram = kvzalloc(SST_MAILBOX_SIZE, GFP_KERNEL); 478 if (!fw_save->sram) { 479 ret = -ENOMEM; 480 goto sram; 481 } 482 483 fw_save->ddr = kvzalloc(ctx->ddr_end - ctx->ddr_base, GFP_KERNEL); 484 if (!fw_save->ddr) { 485 ret = -ENOMEM; 486 goto ddr; 487 } 488 489 memcpy32_fromio(fw_save->iram, ctx->iram, ctx->iram_end - ctx->iram_base); 490 memcpy32_fromio(fw_save->dram, ctx->dram, ctx->dram_end - ctx->dram_base); 491 memcpy32_fromio(fw_save->sram, ctx->mailbox, SST_MAILBOX_SIZE); 492 memcpy32_fromio(fw_save->ddr, ctx->ddr, ctx->ddr_end - ctx->ddr_base); 493 494 ctx->fw_save = fw_save; 495 ctx->ops->reset(ctx); 496 return 0; 497 ddr: 498 kvfree(fw_save->sram); 499 sram: 500 kvfree(fw_save->dram); 501 dram: 502 kvfree(fw_save->iram); 503 iram: 504 kfree(fw_save); 505 return ret; 506 } 507 508 static int intel_sst_resume(struct device *dev) 509 { 510 struct intel_sst_drv *ctx = dev_get_drvdata(dev); 511 struct sst_fw_save *fw_save = ctx->fw_save; 512 struct sst_block *block; 513 int i, ret = 0; 514 515 if (!fw_save) 516 return 0; 517 518 sst_set_fw_state_locked(ctx, SST_FW_LOADING); 519 520 /* we have to restore the memory saved */ 521 ctx->ops->reset(ctx); 522 523 ctx->fw_save = NULL; 524 525 memcpy32_toio(ctx->iram, fw_save->iram, ctx->iram_end - ctx->iram_base); 526 memcpy32_toio(ctx->dram, fw_save->dram, ctx->dram_end - ctx->dram_base); 527 memcpy32_toio(ctx->mailbox, fw_save->sram, SST_MAILBOX_SIZE); 528 memcpy32_toio(ctx->ddr, fw_save->ddr, ctx->ddr_end - ctx->ddr_base); 529 530 kvfree(fw_save->sram); 531 kvfree(fw_save->dram); 532 kvfree(fw_save->iram); 533 kvfree(fw_save->ddr); 534 kfree(fw_save); 535 536 block = sst_create_block(ctx, 0, FW_DWNL_ID); 537 if (block == NULL) 538 return -ENOMEM; 539 540 541 /* start and wait for ack */ 542 ctx->ops->start(ctx); 543 ret = sst_wait_timeout(ctx, block); 544 if (ret) { 545 dev_err(ctx->dev, "fw download failed %d\n", ret); 546 /* FW download failed due to timeout */ 547 ret = -EBUSY; 548 549 } else { 550 sst_set_fw_state_locked(ctx, SST_FW_RUNNING); 551 } 552 553 if (ctx->pdata->streams_lost_on_suspend) { 554 for (i = 1; i <= ctx->info.max_streams; i++) { 555 struct stream_info *stream = &ctx->streams[i]; 556 557 if (stream->resume_status != STREAM_UN_INIT) { 558 dev_dbg(ctx->dev, "Re-allocing stream %d status %d prev %d\n", 559 i, stream->resume_status, 560 stream->resume_prev); 561 sst_realloc_stream(ctx, i); 562 stream->status = stream->resume_status; 563 stream->prev = stream->resume_prev; 564 } 565 } 566 } 567 568 sst_free_block(ctx, block); 569 return ret; 570 } 571 572 const struct dev_pm_ops intel_sst_pm = { 573 .suspend = intel_sst_suspend, 574 .resume = intel_sst_resume, 575 .runtime_suspend = intel_sst_runtime_suspend, 576 }; 577 EXPORT_SYMBOL_GPL(intel_sst_pm); 578