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