summaryrefslogtreecommitdiffstats
path: root/sound/soc/intel/atom/sst/sst.c
blob: 8afdff457579fe9062089fcb6d364cd2185f45ee (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
/*
 *  sst.c - Intel SST Driver for audio engine
 *
 *  Copyright (C) 2008-14	Intel Corp
 *  Authors:	Vinod Koul <vinod.koul@intel.com>
 *		Harsha Priya <priya.harsha@intel.com>
 *		Dharageswari R <dharageswari.r@intel.com>
 *		KP Jeeja <jeeja.kp@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
#include <linux/async.h>
#include <linux/acpi.h>
#include <linux/sysfs.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <asm/platform_sst_audio.h>
#include "../sst-mfld-platform.h"
#include "sst.h"
#include "../../common/sst-dsp.h"

MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver");
MODULE_LICENSE("GPL v2");

static inline bool sst_is_process_reply(u32 msg_id)
{
	return ((msg_id & PROCESS_MSG) ? true : false);
}

static inline bool sst_validate_mailbox_size(unsigned int size)
{
	return ((size <= SST_MAILBOX_SIZE) ? true : false);
}

static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context)
{
	union interrupt_reg_mrfld isr;
	union ipc_header_mrfld header;
	union sst_imr_reg_mrfld imr;
	struct ipc_post *msg = NULL;
	unsigned int size = 0;
	struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
	irqreturn_t retval = IRQ_HANDLED;

	/* Interrupt arrived, check src */
	isr.full = sst_shim_read64(drv->shim, SST_ISRX);

	if (isr.part.done_interrupt) {
		/* Clear done bit */
		spin_lock(&drv->ipc_spin_lock);
		header.full = sst_shim_read64(drv->shim,
					drv->ipc_reg.ipcx);
		header.p.header_high.part.done = 0;
		sst_shim_write64(drv->shim, drv->ipc_reg.ipcx, header.full);

		/* write 1 to clear status register */;
		isr.part.done_interrupt = 1;
		sst_shim_write64(drv->shim, SST_ISRX, isr.full);
		spin_unlock(&drv->ipc_spin_lock);

		/* we can send more messages to DSP so trigger work */
		queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq);
		retval = IRQ_HANDLED;
	}

	if (isr.part.busy_interrupt) {
		/* message from dsp so copy that */
		spin_lock(&drv->ipc_spin_lock);
		imr.full = sst_shim_read64(drv->shim, SST_IMRX);
		imr.part.busy_interrupt = 1;
		sst_shim_write64(drv->shim, SST_IMRX, imr.full);
		spin_unlock(&drv->ipc_spin_lock);
		header.full =  sst_shim_read64(drv->shim, drv->ipc_reg.ipcd);

		if (sst_create_ipc_msg(&msg, header.p.header_high.part.large)) {
			drv->ops->clear_interrupt(drv);
			return IRQ_HANDLED;
		}

		if (header.p.header_high.part.large) {
			size = header.p.header_low_payload;
			if (sst_validate_mailbox_size(size)) {
				memcpy_fromio(msg->mailbox_data,
					drv->mailbox + drv->mailbox_recv_offset, size);
			} else {
				dev_err(drv->dev,
					"Mailbox not copied, payload size is: %u\n", size);
				header.p.header_low_payload = 0;
			}
		}

		msg->mrfld_header = header;
		msg->is_process_reply =
			sst_is_process_reply(header.p.header_high.part.msg_id);
		spin_lock(&drv->rx_msg_lock);
		list_add_tail(&msg->node, &drv->rx_list);
		spin_unlock(&drv->rx_msg_lock);
		drv->ops->clear_interrupt(drv);
		retval = IRQ_WAKE_THREAD;
	}
	return retval;
}

static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context)
{
	struct intel_sst_drv *drv = (struct intel_sst_drv *) context;
	struct ipc_post *__msg, *msg = NULL;
	unsigned long irq_flags;

	spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
	if (list_empty(&drv->rx_list)) {
		spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
		return IRQ_HANDLED;
	}

	list_for_each_entry_safe(msg, __msg, &drv->rx_list, node) {
		list_del(&msg->node);
		spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
		if (msg->is_process_reply)
			drv->ops->process_message(msg);
		else
			drv->ops->process_reply(drv, msg);

		if (msg->is_large)
			kfree(msg->mailbox_data);
		kfree(msg);
		spin_lock_irqsave(&drv->rx_msg_lock, irq_flags);
	}
	spin_unlock_irqrestore(&drv->rx_msg_lock, irq_flags);
	return IRQ_HANDLED;
}

static int sst_save_dsp_context_v2(struct intel_sst_drv *sst)
{
	int ret = 0;

	ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD,
			IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL,
			true, true, false, true);

	if (ret < 0) {
		dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret);
		return -EIO;
	}

	return 0;
}


static struct intel_sst_ops mrfld_ops = {
	.interrupt = intel_sst_interrupt_mrfld,
	.irq_thread = intel_sst_irq_thread_mrfld,
	.clear_interrupt = intel_sst_clear_intr_mrfld,
	.start = sst_start_mrfld,
	.reset = intel_sst_reset_dsp_mrfld,
	.post_message = sst_post_message_mrfld,
	.process_reply = sst_process_reply_mrfld,
	.save_dsp_context =  sst_save_dsp_context_v2,
	.alloc_stream = sst_alloc_stream_mrfld,
	.post_download = sst_post_download_mrfld,
};

int sst_driver_ops(struct intel_sst_drv *sst)
{

	switch (sst->dev_id) {
	case SST_MRFLD_PCI_ID:
	case SST_BYT_ACPI_ID:
	case SST_CHV_ACPI_ID:
		sst->tstamp = SST_TIME_STAMP_MRFLD;
		sst->ops = &mrfld_ops;
		return 0;

	default:
		dev_err(sst->dev,
			"SST Driver capabilities missing for dev_id: %x",
			sst->dev_id);
		return -EINVAL;
	};
}

void sst_process_pending_msg(struct work_struct *work)
{
	struct intel_sst_drv *ctx = container_of(work,
			struct intel_sst_drv, ipc_post_msg_wq);

	ctx->ops->post_message(ctx, NULL, false);
}

static int sst_workqueue_init(struct intel_sst_drv *ctx)
{
	INIT_LIST_HEAD(&ctx->memcpy_list);
	INIT_LIST_HEAD(&ctx->rx_list);
	INIT_LIST_HEAD(&ctx->ipc_dispatch_list);
	INIT_LIST_HEAD(&ctx->block_list);
	INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg);
	init_waitqueue_head(&ctx->wait_queue);

	ctx->post_msg_wq =
		create_singlethread_workqueue("sst_post_msg_wq");
	if (!ctx->post_msg_wq)
		return -EBUSY;
	return 0;
}

static void sst_init_locks(struct intel_sst_drv *ctx)
{
	mutex_init(&ctx->sst_lock);
	spin_lock_init(&ctx->rx_msg_lock);
	spin_lock_init(&ctx->ipc_spin_lock);
	spin_lock_init(&ctx->block_lock);
}

int sst_alloc_drv_context(struct intel_sst_drv **ctx,
		struct device *dev, unsigned int dev_id)
{
	*ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL);
	if (!(*ctx))
		return -ENOMEM;

	(*ctx)->dev = dev;
	(*ctx)->dev_id = dev_id;

	return 0;
}
EXPORT_SYMBOL_GPL(sst_alloc_drv_context);

static ssize_t firmware_version_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->fw_version.type == 0 && ctx->fw_version.major == 0 &&
	    ctx->fw_version.minor == 0 && ctx->fw_version.build == 0)
		return sprintf(buf, "FW not yet loaded\n");
	else
		return sprintf(buf, "v%02x.%02x.%02x.%02x\n",
			       ctx->fw_version.type, ctx->fw_version.major,
			       ctx->fw_version.minor, ctx->fw_version.build);

}

static DEVICE_ATTR_RO(firmware_version);

static const struct attribute *sst_fw_version_attrs[] = {
	&dev_attr_firmware_version.attr,
	NULL,
};

static const struct attribute_group sst_fw_version_attr_group = {
	.attrs = (struct attribute **)sst_fw_version_attrs,
};

int sst_context_init(struct intel_sst_drv *ctx)
{
	int ret = 0, i;

	if (!ctx->pdata)
		return -EINVAL;

	if (!ctx->pdata->probe_data)
		return -EINVAL;

	memcpy(&ctx->info, ctx->pdata->probe_data, sizeof(ctx->info));

	ret = sst_driver_ops(ctx);
	if (ret != 0)
		return -EINVAL;

	sst_init_locks(ctx);
	sst_set_fw_state_locked(ctx, SST_RESET);

	/* pvt_id 0 reserved for async messages */
	ctx->pvt_id = 1;
	ctx->stream_cnt = 0;
	ctx->fw_in_mem = NULL;
	/* we use memcpy, so set to 0 */
	ctx->use_dma = 0;
	ctx->use_lli = 0;

	if (sst_workqueue_init(ctx))
		return -EINVAL;

	ctx->mailbox_recv_offset = ctx->pdata->ipc_info->mbox_recv_off;
	ctx->ipc_reg.ipcx = SST_IPCX + ctx->pdata->ipc_info->ipc_offset;
	ctx->ipc_reg.ipcd = SST_IPCD + ctx->pdata->ipc_info->ipc_offset;

	dev_info(ctx->dev, "Got drv data max stream %d\n",
				ctx->info.max_streams);

	for (i = 1; i <= ctx->info.max_streams; i++) {
		struct stream_info *stream = &ctx->streams[i];

		memset(stream, 0, sizeof(*stream));
		stream->pipe_id = PIPE_RSVD;
		mutex_init(&stream->lock);
	}

	/* Register the ISR */
	ret = devm_request_threaded_irq(ctx->dev, ctx->irq_num, ctx->ops->interrupt,
					ctx->ops->irq_thread, 0, SST_DRV_NAME,
					ctx);
	if (ret)
		goto do_free_mem;

	dev_dbg(ctx->dev, "Registered IRQ %#x\n", ctx->irq_num);

	/* default intr are unmasked so set this as masked */
	sst_shim_write64(ctx->shim, SST_IMRX, 0xFFFF0038);

	ctx->qos = devm_kzalloc(ctx->dev,
		sizeof(struct pm_qos_request), GFP_KERNEL);
	if (!ctx->qos) {
		ret = -ENOMEM;
		goto do_free_mem;
	}
	pm_qos_add_request(ctx->qos, PM_QOS_CPU_DMA_LATENCY,
				PM_QOS_DEFAULT_VALUE);

	dev_dbg(ctx->dev, "Requesting FW %s now...\n", ctx->firmware_name);
	ret = request_firmware_nowait(THIS_MODULE, true, ctx->firmware_name,
				      ctx->dev, GFP_KERNEL, ctx, sst_firmware_load_cb);
	if (ret) {
		dev_err(ctx->dev, "Firmware download failed:%d\n", ret);
		goto do_free_mem;
	}

	ret = sysfs_create_group(&ctx->dev->kobj,
				 &sst_fw_version_attr_group);
	if (ret) {
		dev_err(ctx->dev,
			"Unable to create sysfs\n");
		goto err_sysfs;
	}

	sst_register(ctx->dev);
	return 0;
err_sysfs:
	sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);

do_free_mem:
	destroy_workqueue(ctx->post_msg_wq);
	return ret;
}
EXPORT_SYMBOL_GPL(sst_context_init);

void sst_context_cleanup(struct intel_sst_drv *ctx)
{
	pm_runtime_get_noresume(ctx->dev);
	pm_runtime_disable(ctx->dev);
	sst_unregister(ctx->dev);
	sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
	sysfs_remove_group(&ctx->dev->kobj, &sst_fw_version_attr_group);
	flush_scheduled_work();
	destroy_workqueue(ctx->post_msg_wq);
	pm_qos_remove_request(ctx->qos);
	kfree(ctx->fw_sg_list.src);
	kfree(ctx->fw_sg_list.dst);
	ctx->fw_sg_list.list_len = 0;
	kfree(ctx->fw_in_mem);
	ctx->fw_in_mem = NULL;
	sst_memcpy_free_resources(ctx);
	ctx = NULL;
}
EXPORT_SYMBOL_GPL(sst_context_cleanup);

void sst_configure_runtime_pm(struct intel_sst_drv *ctx)
{
	pm_runtime_set_autosuspend_delay(ctx->dev, SST_SUSPEND_DELAY);
	pm_runtime_use_autosuspend(ctx->dev);
	/*
	 * For acpi devices, the actual physical device state is
	 * initially active. So change the state to active before
	 * enabling the pm
	 */

	if (!acpi_disabled)
		pm_runtime_set_active(ctx->dev);

	pm_runtime_enable(ctx->dev);

	if (acpi_disabled)
		pm_runtime_set_active(ctx->dev);
	else
		pm_runtime_put_noidle(ctx->dev);
}
EXPORT_SYMBOL_GPL(sst_configure_runtime_pm);

static int intel_sst_runtime_suspend(struct device *dev)
{
	int ret = 0;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->sst_state == SST_RESET) {
		dev_dbg(dev, "LPE is already in RESET state, No action\n");
		return 0;
	}
	/* save fw context */
	if (ctx->ops->save_dsp_context(ctx))
		return -EBUSY;

	/* Move the SST state to Reset */
	sst_set_fw_state_locked(ctx, SST_RESET);

	synchronize_irq(ctx->irq_num);
	flush_workqueue(ctx->post_msg_wq);

	ctx->ops->reset(ctx);

	return ret;
}

static int intel_sst_suspend(struct device *dev)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
	struct sst_fw_save *fw_save;
	int i, ret = 0;

	/* check first if we are already in SW reset */
	if (ctx->sst_state == SST_RESET)
		return 0;

	/*
	 * check if any stream is active and running
	 * they should already by suspend by soc_suspend
	 */
	for (i = 1; i <= ctx->info.max_streams; i++) {
		struct stream_info *stream = &ctx->streams[i];

		if (stream->status == STREAM_RUNNING) {
			dev_err(dev, "stream %d is running, can't suspend, abort\n", i);
			return -EBUSY;
		}
	}
	synchronize_irq(ctx->irq_num);
	flush_workqueue(ctx->post_msg_wq);

	/* Move the SST state to Reset */
	sst_set_fw_state_locked(ctx, SST_RESET);

	/* tell DSP we are suspending */
	if (ctx->ops->save_dsp_context(ctx))
		return -EBUSY;

	/* save the memories */
	fw_save = kzalloc(sizeof(*fw_save), GFP_KERNEL);
	if (!fw_save)
		return -ENOMEM;
	fw_save->iram = kvzalloc(ctx->iram_end - ctx->iram_base, GFP_KERNEL);
	if (!fw_save->iram) {
		ret = -ENOMEM;
		goto iram;
	}
	fw_save->dram = kvzalloc(ctx->dram_end - ctx->dram_base, GFP_KERNEL);
	if (!fw_save->dram) {
		ret = -ENOMEM;
		goto dram;
	}
	fw_save->sram = kvzalloc(SST_MAILBOX_SIZE, GFP_KERNEL);
	if (!fw_save->sram) {
		ret = -ENOMEM;
		goto sram;
	}

	fw_save->ddr = kvzalloc(ctx->ddr_end - ctx->ddr_base, GFP_KERNEL);
	if (!fw_save->ddr) {
		ret = -ENOMEM;
		goto ddr;
	}

	memcpy32_fromio(fw_save->iram, ctx->iram, ctx->iram_end - ctx->iram_base);
	memcpy32_fromio(fw_save->dram, ctx->dram, ctx->dram_end - ctx->dram_base);
	memcpy32_fromio(fw_save->sram, ctx->mailbox, SST_MAILBOX_SIZE);
	memcpy32_fromio(fw_save->ddr, ctx->ddr, ctx->ddr_end - ctx->ddr_base);

	ctx->fw_save = fw_save;
	ctx->ops->reset(ctx);
	return 0;
ddr:
	kvfree(fw_save->sram);
sram:
	kvfree(fw_save->dram);
dram:
	kvfree(fw_save->iram);
iram:
	kfree(fw_save);
	return ret;
}

static int intel_sst_resume(struct device *dev)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
	struct sst_fw_save *fw_save = ctx->fw_save;
	int ret = 0;
	struct sst_block *block;

	if (!fw_save)
		return 0;

	sst_set_fw_state_locked(ctx, SST_FW_LOADING);

	/* we have to restore the memory saved */
	ctx->ops->reset(ctx);

	ctx->fw_save = NULL;

	memcpy32_toio(ctx->iram, fw_save->iram, ctx->iram_end - ctx->iram_base);
	memcpy32_toio(ctx->dram, fw_save->dram, ctx->dram_end - ctx->dram_base);
	memcpy32_toio(ctx->mailbox, fw_save->sram, SST_MAILBOX_SIZE);
	memcpy32_toio(ctx->ddr, fw_save->ddr, ctx->ddr_end - ctx->ddr_base);

	kvfree(fw_save->sram);
	kvfree(fw_save->dram);
	kvfree(fw_save->iram);
	kvfree(fw_save->ddr);
	kfree(fw_save);

	block = sst_create_block(ctx, 0, FW_DWNL_ID);
	if (block == NULL)
		return -ENOMEM;


	/* start and wait for ack */
	ctx->ops->start(ctx);
	ret = sst_wait_timeout(ctx, block);
	if (ret) {
		dev_err(ctx->dev, "fw download failed %d\n", ret);
		/* FW download failed due to timeout */
		ret = -EBUSY;

	} else {
		sst_set_fw_state_locked(ctx, SST_FW_RUNNING);
	}

	sst_free_block(ctx, block);
	return ret;
}

const struct dev_pm_ops intel_sst_pm = {
	.suspend = intel_sst_suspend,
	.resume = intel_sst_resume,
	.runtime_suspend = intel_sst_runtime_suspend,
};
EXPORT_SYMBOL_GPL(intel_sst_pm);