summaryrefslogtreecommitdiff
path: root/sound/soc/sof/core.c
blob: 83fe0401baf867b071a7449d71d98c207506a15c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license.  When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//

#include <linux/firmware.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/sof.h>
#include "sof-priv.h"
#include "sof-of-dev.h"
#include "ops.h"

#define CREATE_TRACE_POINTS
#include <trace/events/sof.h>

/* see SOF_DBG_ flags */
static int sof_core_debug =  IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE);
module_param_named(sof_debug, sof_core_debug, int, 0444);
MODULE_PARM_DESC(sof_debug, "SOF core debug options (0x0 all off)");

/* SOF defaults if not provided by the platform in ms */
#define TIMEOUT_DEFAULT_IPC_MS  500
#define TIMEOUT_DEFAULT_BOOT_MS 2000

/**
 * sof_debug_check_flag - check if a given flag(s) is set in sof_core_debug
 * @mask: Flag or combination of flags to check
 *
 * Returns true if all bits set in mask is also set in sof_core_debug, otherwise
 * false
 */
bool sof_debug_check_flag(int mask)
{
	if ((sof_core_debug & mask) == mask)
		return true;

	return false;
}
EXPORT_SYMBOL(sof_debug_check_flag);

/*
 * FW Panic/fault handling.
 */

struct sof_panic_msg {
	u32 id;
	const char *msg;
};

/* standard FW panic types */
static const struct sof_panic_msg panic_msg[] = {
	{SOF_IPC_PANIC_MEM, "out of memory"},
	{SOF_IPC_PANIC_WORK, "work subsystem init failed"},
	{SOF_IPC_PANIC_IPC, "IPC subsystem init failed"},
	{SOF_IPC_PANIC_ARCH, "arch init failed"},
	{SOF_IPC_PANIC_PLATFORM, "platform init failed"},
	{SOF_IPC_PANIC_TASK, "scheduler init failed"},
	{SOF_IPC_PANIC_EXCEPTION, "runtime exception"},
	{SOF_IPC_PANIC_DEADLOCK, "deadlock"},
	{SOF_IPC_PANIC_STACK, "stack overflow"},
	{SOF_IPC_PANIC_IDLE, "can't enter idle"},
	{SOF_IPC_PANIC_WFI, "invalid wait state"},
	{SOF_IPC_PANIC_ASSERT, "assertion failed"},
};

/**
 * sof_print_oops_and_stack - Handle the printing of DSP oops and stack trace
 * @sdev: Pointer to the device's sdev
 * @level: prink log level to use for the printing
 * @panic_code: the panic code
 * @tracep_code: tracepoint code
 * @oops: Pointer to DSP specific oops data
 * @panic_info: Pointer to the received panic information message
 * @stack: Pointer to the call stack data
 * @stack_words: Number of words in the stack data
 *
 * helper to be called from .dbg_dump callbacks. No error code is
 * provided, it's left as an exercise for the caller of .dbg_dump
 * (typically IPC or loader)
 */
void sof_print_oops_and_stack(struct snd_sof_dev *sdev, const char *level,
			      u32 panic_code, u32 tracep_code, void *oops,
			      struct sof_ipc_panic_info *panic_info,
			      void *stack, size_t stack_words)
{
	u32 code;
	int i;

	/* is firmware dead ? */
	if ((panic_code & SOF_IPC_PANIC_MAGIC_MASK) != SOF_IPC_PANIC_MAGIC) {
		dev_printk(level, sdev->dev, "unexpected fault %#010x trace %#010x\n",
			   panic_code, tracep_code);
		return; /* no fault ? */
	}

	code = panic_code & (SOF_IPC_PANIC_MAGIC_MASK | SOF_IPC_PANIC_CODE_MASK);

	for (i = 0; i < ARRAY_SIZE(panic_msg); i++) {
		if (panic_msg[i].id == code) {
			dev_printk(level, sdev->dev, "reason: %s (%#x)\n",
				   panic_msg[i].msg, code & SOF_IPC_PANIC_CODE_MASK);
			dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code);
			goto out;
		}
	}

	/* unknown error */
	dev_printk(level, sdev->dev, "unknown panic code: %#x\n",
		   code & SOF_IPC_PANIC_CODE_MASK);
	dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code);

out:
	dev_printk(level, sdev->dev, "panic at %s:%d\n", panic_info->filename,
		   panic_info->linenum);
	sof_oops(sdev, level, oops);
	sof_stack(sdev, level, oops, stack, stack_words);
}
EXPORT_SYMBOL(sof_print_oops_and_stack);

/* Helper to manage DSP state */
void sof_set_fw_state(struct snd_sof_dev *sdev, enum sof_fw_state new_state)
{
	if (sdev->fw_state == new_state)
		return;

	dev_dbg(sdev->dev, "fw_state change: %d -> %d\n", sdev->fw_state, new_state);
	sdev->fw_state = new_state;

	switch (new_state) {
	case SOF_FW_BOOT_NOT_STARTED:
	case SOF_FW_BOOT_COMPLETE:
	case SOF_FW_CRASHED:
		sof_client_fw_state_dispatcher(sdev);
		fallthrough;
	default:
		break;
	}
}
EXPORT_SYMBOL(sof_set_fw_state);

static struct snd_sof_of_mach *sof_of_machine_select(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *sof_pdata = sdev->pdata;
	const struct sof_dev_desc *desc = sof_pdata->desc;
	struct snd_sof_of_mach *mach = desc->of_machines;

	if (!mach)
		return NULL;

	for (; mach->compatible; mach++) {
		if (of_machine_is_compatible(mach->compatible)) {
			sof_pdata->tplg_filename = mach->sof_tplg_filename;
			if (mach->fw_filename)
				sof_pdata->fw_filename = mach->fw_filename;

			return mach;
		}
	}

	return NULL;
}

/* SOF Driver enumeration */
static int sof_machine_check(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *sof_pdata = sdev->pdata;
	const struct sof_dev_desc *desc = sof_pdata->desc;
	struct snd_soc_acpi_mach *mach;

	if (!IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)) {
		const struct snd_sof_of_mach *of_mach;

		if (IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC_DEBUG_SUPPORT) &&
		    sof_debug_check_flag(SOF_DBG_FORCE_NOCODEC))
			goto nocodec;

		/* find machine */
		mach = snd_sof_machine_select(sdev);
		if (mach) {
			sof_pdata->machine = mach;

			if (sof_pdata->subsystem_id_set) {
				mach->mach_params.subsystem_vendor = sof_pdata->subsystem_vendor;
				mach->mach_params.subsystem_device = sof_pdata->subsystem_device;
				mach->mach_params.subsystem_id_set = true;
			}

			snd_sof_set_mach_params(mach, sdev);
			return 0;
		}

		of_mach = sof_of_machine_select(sdev);
		if (of_mach) {
			sof_pdata->of_machine = of_mach;
			return 0;
		}

		if (!IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)) {
			dev_err(sdev->dev, "error: no matching ASoC machine driver found - aborting probe\n");
			return -ENODEV;
		}
	} else {
		dev_warn(sdev->dev, "Force to use nocodec mode\n");
	}

nocodec:
	/* select nocodec mode */
	dev_warn(sdev->dev, "Using nocodec machine driver\n");
	mach = devm_kzalloc(sdev->dev, sizeof(*mach), GFP_KERNEL);
	if (!mach)
		return -ENOMEM;

	mach->drv_name = "sof-nocodec";
	if (!sof_pdata->tplg_filename)
		sof_pdata->tplg_filename = desc->nocodec_tplg_filename;

	sof_pdata->machine = mach;
	snd_sof_set_mach_params(mach, sdev);

	return 0;
}

static int sof_select_ipc_and_paths(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *plat_data = sdev->pdata;
	struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;
	struct sof_loadable_file_profile out_profile;
	struct device *dev = sdev->dev;
	int ret;

	if (base_profile->ipc_type != plat_data->desc->ipc_default)
		dev_info(dev,
			 "Module parameter used, overriding default IPC %d to %d\n",
			 plat_data->desc->ipc_default, base_profile->ipc_type);

	if (base_profile->fw_path)
		dev_dbg(dev, "Module parameter used, changed fw path to %s\n",
			base_profile->fw_path);
	else if (base_profile->fw_path_postfix)
		dev_dbg(dev, "Path postfix appended to default fw path: %s\n",
			base_profile->fw_path_postfix);

	if (base_profile->fw_lib_path)
		dev_dbg(dev, "Module parameter used, changed fw_lib path to %s\n",
			base_profile->fw_lib_path);
	else if (base_profile->fw_lib_path_postfix)
		dev_dbg(dev, "Path postfix appended to default fw_lib path: %s\n",
			base_profile->fw_lib_path_postfix);

	if (base_profile->fw_name)
		dev_dbg(dev, "Module parameter used, changed fw filename to %s\n",
			base_profile->fw_name);

	if (base_profile->tplg_path)
		dev_dbg(dev, "Module parameter used, changed tplg path to %s\n",
			base_profile->tplg_path);

	if (base_profile->tplg_name)
		dev_dbg(dev, "Module parameter used, changed tplg name to %s\n",
			base_profile->tplg_name);

	ret = sof_create_ipc_file_profile(sdev, base_profile, &out_profile);
	if (ret)
		return ret;

	plat_data->ipc_type = out_profile.ipc_type;
	plat_data->fw_filename = out_profile.fw_name;
	plat_data->fw_filename_prefix = out_profile.fw_path;
	plat_data->fw_lib_prefix = out_profile.fw_lib_path;
	plat_data->tplg_filename_prefix = out_profile.tplg_path;

	return 0;
}

static int validate_sof_ops(struct snd_sof_dev *sdev)
{
	int ret;

	/* init ops, if necessary */
	ret = sof_ops_init(sdev);
	if (ret < 0)
		return ret;

	/* check all mandatory ops */
	if (!sof_ops(sdev) || !sof_ops(sdev)->probe) {
		dev_err(sdev->dev, "missing mandatory ops\n");
		sof_ops_free(sdev);
		return -EINVAL;
	}

	if (!sdev->dspless_mode_selected &&
	    (!sof_ops(sdev)->run || !sof_ops(sdev)->block_read ||
	     !sof_ops(sdev)->block_write || !sof_ops(sdev)->send_msg ||
	     !sof_ops(sdev)->load_firmware || !sof_ops(sdev)->ipc_msg_data)) {
		dev_err(sdev->dev, "missing mandatory DSP ops\n");
		sof_ops_free(sdev);
		return -EINVAL;
	}

	return 0;
}

static int sof_init_sof_ops(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *plat_data = sdev->pdata;
	struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;

	/* check IPC support */
	if (!(BIT(base_profile->ipc_type) & plat_data->desc->ipc_supported_mask)) {
		dev_err(sdev->dev,
			"ipc_type %d is not supported on this platform, mask is %#x\n",
			base_profile->ipc_type, plat_data->desc->ipc_supported_mask);
		return -EINVAL;
	}

	/*
	 * Save the selected IPC type and a topology name override before
	 * selecting ops since platform code might need this information
	 */
	plat_data->ipc_type = base_profile->ipc_type;
	plat_data->tplg_filename = base_profile->tplg_name;

	return validate_sof_ops(sdev);
}

static int sof_init_environment(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *plat_data = sdev->pdata;
	struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;
	int ret;

	/* probe the DSP hardware */
	ret = snd_sof_probe(sdev);
	if (ret < 0) {
		dev_err(sdev->dev, "failed to probe DSP %d\n", ret);
		goto err_sof_probe;
	}

	/* check machine info */
	ret = sof_machine_check(sdev);
	if (ret < 0) {
		dev_err(sdev->dev, "failed to get machine info %d\n", ret);
		goto err_machine_check;
	}

	ret = sof_select_ipc_and_paths(sdev);
	if (ret) {
		goto err_machine_check;
	} else if (plat_data->ipc_type != base_profile->ipc_type) {
		/* IPC type changed, re-initialize the ops */
		sof_ops_free(sdev);

		ret = validate_sof_ops(sdev);
		if (ret < 0) {
			snd_sof_remove(sdev);
			snd_sof_remove_late(sdev);
			return ret;
		}
	}

	return 0;

err_machine_check:
	snd_sof_remove(sdev);
err_sof_probe:
	snd_sof_remove_late(sdev);
	sof_ops_free(sdev);

	return ret;
}

/*
 *			FW Boot State Transition Diagram
 *
 *    +----------------------------------------------------------------------+
 *    |									     |
 * ------------------	     ------------------				     |
 * |		    |	     |		      |				     |
 * |   BOOT_FAILED  |<-------|  READY_FAILED  |				     |
 * |		    |<--+    |	              |	   ------------------	     |
 * ------------------	|    ------------------	   |		    |	     |
 *	^		|	    ^		   |	CRASHED	    |---+    |
 *	|		|	    |		   |		    |	|    |
 * (FW Boot Timeout)	|	(FW_READY FAIL)	   ------------------	|    |
 *	|		|	    |		     ^			|    |
 *	|		|	    |		     |(DSP Panic)	|    |
 * ------------------	|	    |		   ------------------	|    |
 * |		    |	|	    |		   |		    |	|    |
 * |   IN_PROGRESS  |---------------+------------->|    COMPLETE    |	|    |
 * |		    | (FW Boot OK)   (FW_READY OK) |		    |	|    |
 * ------------------	|			   ------------------	|    |
 *	^		|				|		|    |
 *	|		|				|		|    |
 * (FW Loading OK)	|			(System Suspend/Runtime Suspend)
 *	|		|				|		|    |
 *	|	(FW Loading Fail)			|		|    |
 * ------------------	|	------------------	|		|    |
 * |		    |	|	|		 |<-----+		|    |
 * |   PREPARE	    |---+	|   NOT_STARTED  |<---------------------+    |
 * |		    |		|		 |<--------------------------+
 * ------------------		------------------
 *    |	    ^			    |	   ^
 *    |	    |			    |	   |
 *    |	    +-----------------------+	   |
 *    |		(DSP Probe OK)		   |
 *    |					   |
 *    |					   |
 *    +------------------------------------+
 *	(System Suspend/Runtime Suspend)
 */

static int sof_probe_continue(struct snd_sof_dev *sdev)
{
	struct snd_sof_pdata *plat_data = sdev->pdata;
	int ret;

	/* Initialize loadable file paths and check the environment validity */
	ret = sof_init_environment(sdev);
	if (ret)
		return ret;

	sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);

	/* set up platform component driver */
	snd_sof_new_platform_drv(sdev);

	if (sdev->dspless_mode_selected) {
		sof_set_fw_state(sdev, SOF_DSPLESS_MODE);
		goto skip_dsp_init;
	}

	/* register any debug/trace capabilities */
	ret = snd_sof_dbg_init(sdev);
	if (ret < 0) {
		/*
		 * debugfs issues are suppressed in snd_sof_dbg_init() since
		 * we cannot rely on debugfs
		 * here we trap errors due to memory allocation only.
		 */
		dev_err(sdev->dev, "error: failed to init DSP trace/debug %d\n",
			ret);
		goto dbg_err;
	}

	/* init the IPC */
	sdev->ipc = snd_sof_ipc_init(sdev);
	if (!sdev->ipc) {
		ret = -ENOMEM;
		dev_err(sdev->dev, "error: failed to init DSP IPC %d\n", ret);
		goto ipc_err;
	}

	/* load the firmware */
	ret = snd_sof_load_firmware(sdev);
	if (ret < 0) {
		dev_err(sdev->dev, "error: failed to load DSP firmware %d\n",
			ret);
		sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
		goto fw_load_err;
	}

	sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS);

	/*
	 * Boot the firmware. The FW boot status will be modified
	 * in snd_sof_run_firmware() depending on the outcome.
	 */
	ret = snd_sof_run_firmware(sdev);
	if (ret < 0) {
		dev_err(sdev->dev, "error: failed to boot DSP firmware %d\n",
			ret);
		sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
		goto fw_run_err;
	}

	if (sof_debug_check_flag(SOF_DBG_ENABLE_TRACE)) {
		sdev->fw_trace_is_supported = true;

		/* init firmware tracing */
		ret = sof_fw_trace_init(sdev);
		if (ret < 0) {
			/* non fatal */
			dev_warn(sdev->dev, "failed to initialize firmware tracing %d\n",
				 ret);
		}
	} else {
		dev_dbg(sdev->dev, "SOF firmware trace disabled\n");
	}

skip_dsp_init:
	/* hereafter all FW boot flows are for PM reasons */
	sdev->first_boot = false;

	/* now register audio DSP platform driver and dai */
	ret = devm_snd_soc_register_component(sdev->dev, &sdev->plat_drv,
					      sof_ops(sdev)->drv,
					      sof_ops(sdev)->num_drv);
	if (ret < 0) {
		dev_err(sdev->dev,
			"error: failed to register DSP DAI driver %d\n", ret);
		goto fw_trace_err;
	}

	ret = snd_sof_machine_register(sdev, plat_data);
	if (ret < 0) {
		dev_err(sdev->dev,
			"error: failed to register machine driver %d\n", ret);
		goto fw_trace_err;
	}

	ret = sof_register_clients(sdev);
	if (ret < 0) {
		dev_err(sdev->dev, "failed to register clients %d\n", ret);
		goto sof_machine_err;
	}

	/*
	 * Some platforms in SOF, ex: BYT, may not have their platform PM
	 * callbacks set. Increment the usage count so as to
	 * prevent the device from entering runtime suspend.
	 */
	if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume)
		pm_runtime_get_noresume(sdev->dev);

	if (plat_data->sof_probe_complete)
		plat_data->sof_probe_complete(sdev->dev);

	sdev->probe_completed = true;

	return 0;

sof_machine_err:
	snd_sof_machine_unregister(sdev, plat_data);
fw_trace_err:
	sof_fw_trace_free(sdev);
fw_run_err:
	snd_sof_fw_unload(sdev);
fw_load_err:
	snd_sof_ipc_free(sdev);
ipc_err:
dbg_err:
	snd_sof_free_debug(sdev);
	snd_sof_remove(sdev);
	snd_sof_remove_late(sdev);
	sof_ops_free(sdev);

	/* all resources freed, update state to match */
	sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
	sdev->first_boot = true;

	return ret;
}

static void sof_probe_work(struct work_struct *work)
{
	struct snd_sof_dev *sdev =
		container_of(work, struct snd_sof_dev, probe_work);
	int ret;

	ret = sof_probe_continue(sdev);
	if (ret < 0) {
		/* errors cannot be propagated, log */
		dev_err(sdev->dev, "error: %s failed err: %d\n", __func__, ret);
	}
}

int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
{
	struct snd_sof_dev *sdev;
	int ret;

	sdev = devm_kzalloc(dev, sizeof(*sdev), GFP_KERNEL);
	if (!sdev)
		return -ENOMEM;

	/* initialize sof device */
	sdev->dev = dev;

	/* initialize default DSP power state */
	sdev->dsp_power_state.state = SOF_DSP_PM_D0;

	sdev->pdata = plat_data;
	sdev->first_boot = true;
	dev_set_drvdata(dev, sdev);

	if (sof_core_debug)
		dev_info(dev, "sof_debug value: %#x\n", sof_core_debug);

	if (sof_debug_check_flag(SOF_DBG_DSPLESS_MODE)) {
		if (plat_data->desc->dspless_mode_supported) {
			dev_info(dev, "Switching to DSPless mode\n");
			sdev->dspless_mode_selected = true;
		} else {
			dev_info(dev, "DSPless mode is not supported by the platform\n");
		}
	}

	/* Initialize sof_ops based on the initial selected IPC version */
	ret = sof_init_sof_ops(sdev);
	if (ret)
		return ret;

	INIT_LIST_HEAD(&sdev->pcm_list);
	INIT_LIST_HEAD(&sdev->kcontrol_list);
	INIT_LIST_HEAD(&sdev->widget_list);
	INIT_LIST_HEAD(&sdev->pipeline_list);
	INIT_LIST_HEAD(&sdev->dai_list);
	INIT_LIST_HEAD(&sdev->dai_link_list);
	INIT_LIST_HEAD(&sdev->route_list);
	INIT_LIST_HEAD(&sdev->ipc_client_list);
	INIT_LIST_HEAD(&sdev->ipc_rx_handler_list);
	INIT_LIST_HEAD(&sdev->fw_state_handler_list);
	spin_lock_init(&sdev->ipc_lock);
	spin_lock_init(&sdev->hw_lock);
	mutex_init(&sdev->power_state_access);
	mutex_init(&sdev->ipc_client_mutex);
	mutex_init(&sdev->client_event_handler_mutex);

	/* set default timeouts if none provided */
	if (plat_data->desc->ipc_timeout == 0)
		sdev->ipc_timeout = TIMEOUT_DEFAULT_IPC_MS;
	else
		sdev->ipc_timeout = plat_data->desc->ipc_timeout;
	if (plat_data->desc->boot_timeout == 0)
		sdev->boot_timeout = TIMEOUT_DEFAULT_BOOT_MS;
	else
		sdev->boot_timeout = plat_data->desc->boot_timeout;

	sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);

	/*
	 * first pass of probe which isn't allowed to run in a work-queue,
	 * typically to rely on -EPROBE_DEFER dependencies
	 */
	ret = snd_sof_probe_early(sdev);
	if (ret < 0)
		return ret;

	if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) {
		INIT_WORK(&sdev->probe_work, sof_probe_work);
		schedule_work(&sdev->probe_work);
		return 0;
	}

	return sof_probe_continue(sdev);
}
EXPORT_SYMBOL(snd_sof_device_probe);

bool snd_sof_device_probe_completed(struct device *dev)
{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);

	return sdev->probe_completed;
}
EXPORT_SYMBOL(snd_sof_device_probe_completed);

int snd_sof_device_remove(struct device *dev)
{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	struct snd_sof_pdata *pdata = sdev->pdata;
	int ret;
	bool aborted = false;

	if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
		aborted = cancel_work_sync(&sdev->probe_work);

	/*
	 * Unregister any registered client device first before IPC and debugfs
	 * to allow client drivers to be removed cleanly
	 */
	sof_unregister_clients(sdev);

	/*
	 * Unregister machine driver. This will unbind the snd_card which
	 * will remove the component driver and unload the topology
	 * before freeing the snd_card.
	 */
	snd_sof_machine_unregister(sdev, pdata);

	/*
	 * Balance the runtime pm usage count in case we are faced with an
	 * exception and we forcably prevented D3 power state to preserve
	 * context
	 */
	if (sdev->d3_prevented) {
		sdev->d3_prevented = false;
		pm_runtime_put_noidle(sdev->dev);
	}

	if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) {
		sof_fw_trace_free(sdev);
		ret = snd_sof_dsp_power_down_notify(sdev);
		if (ret < 0)
			dev_warn(dev, "error: %d failed to prepare DSP for device removal",
				 ret);

		snd_sof_ipc_free(sdev);
		snd_sof_free_debug(sdev);
		snd_sof_remove(sdev);
		snd_sof_remove_late(sdev);
		sof_ops_free(sdev);
	} else if (aborted) {
		/* probe_work never ran */
		snd_sof_remove_late(sdev);
		sof_ops_free(sdev);
	}

	/* release firmware */
	snd_sof_fw_unload(sdev);

	return 0;
}
EXPORT_SYMBOL(snd_sof_device_remove);

int snd_sof_device_shutdown(struct device *dev)
{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);

	if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
		cancel_work_sync(&sdev->probe_work);

	if (sdev->fw_state == SOF_FW_BOOT_COMPLETE) {
		sof_fw_trace_free(sdev);
		return snd_sof_shutdown(sdev);
	}

	return 0;
}
EXPORT_SYMBOL(snd_sof_device_shutdown);

/* Machine driver registering and unregistering */
int sof_machine_register(struct snd_sof_dev *sdev, void *pdata)
{
	struct snd_sof_pdata *plat_data = pdata;
	const char *drv_name;
	const void *mach;
	int size;

	drv_name = plat_data->machine->drv_name;
	mach = plat_data->machine;
	size = sizeof(*plat_data->machine);

	/* register machine driver, pass machine info as pdata */
	plat_data->pdev_mach =
		platform_device_register_data(sdev->dev, drv_name,
					      PLATFORM_DEVID_NONE, mach, size);
	if (IS_ERR(plat_data->pdev_mach))
		return PTR_ERR(plat_data->pdev_mach);

	dev_dbg(sdev->dev, "created machine %s\n",
		dev_name(&plat_data->pdev_mach->dev));

	return 0;
}
EXPORT_SYMBOL(sof_machine_register);

void sof_machine_unregister(struct snd_sof_dev *sdev, void *pdata)
{
	struct snd_sof_pdata *plat_data = pdata;

	platform_device_unregister(plat_data->pdev_mach);
}
EXPORT_SYMBOL(sof_machine_unregister);

MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Sound Open Firmware (SOF) Core");
MODULE_ALIAS("platform:sof-audio");
MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);