summaryrefslogtreecommitdiffstats
path: root/sound/soc/pxa/mmp-sspa.c
blob: a1ed141b8795cbe3a84b2c8943c55cbbd452c48b (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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * linux/sound/soc/pxa/mmp-sspa.c
 * Base on pxa2xx-ssp.c
 *
 * Copyright (C) 2011 Marvell International Ltd.
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/dmaengine.h>
#include <linux/pm_runtime.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>
#include "mmp-sspa.h"

/*
 * SSPA audio private data
 */
struct sspa_priv {
	void __iomem *tx_base;
	void __iomem *rx_base;

	struct snd_dmaengine_dai_dma_data playback_dma_data;
	struct snd_dmaengine_dai_dma_data capture_dma_data;
	struct clk *clk;
	struct clk *audio_clk;
	struct clk *sysclk;

	int running_cnt;
	u32 sp;
	u32 ctrl;
};

static void mmp_sspa_tx_enable(struct sspa_priv *sspa)
{
	unsigned int sspa_sp = sspa->sp;

	sspa_sp &= ~SSPA_SP_MSL;
	sspa_sp |= SSPA_SP_S_EN;
	sspa_sp |= SSPA_SP_WEN;
	__raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
}

static void mmp_sspa_tx_disable(struct sspa_priv *sspa)
{
	unsigned int sspa_sp = sspa->sp;

	sspa_sp &= ~SSPA_SP_MSL;
	sspa_sp &= ~SSPA_SP_S_EN;
	sspa_sp |= SSPA_SP_WEN;
	__raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
}

static void mmp_sspa_rx_enable(struct sspa_priv *sspa)
{
	unsigned int sspa_sp = sspa->sp;

	sspa_sp |= SSPA_SP_S_EN;
	sspa_sp |= SSPA_SP_WEN;
	__raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
}

static void mmp_sspa_rx_disable(struct sspa_priv *sspa)
{
	unsigned int sspa_sp = sspa->sp;

	sspa_sp &= ~SSPA_SP_S_EN;
	sspa_sp |= SSPA_SP_WEN;
	__raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
}

static int mmp_sspa_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);

	clk_prepare_enable(sspa->sysclk);
	clk_prepare_enable(sspa->clk);

	return 0;
}

static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);

	clk_disable_unprepare(sspa->clk);
	clk_disable_unprepare(sspa->sysclk);
}

/*
 * Set the SSP ports SYSCLK.
 */
static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
				    int clk_id, unsigned int freq, int dir)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
	struct device *dev = cpu_dai->component->dev;
	int ret = 0;

	if (dev->of_node)
		return -ENOTSUPP;

	switch (clk_id) {
	case MMP_SSPA_CLK_AUDIO:
		ret = clk_set_rate(sspa->audio_clk, freq);
		if (ret)
			return ret;
		break;
	case MMP_SSPA_CLK_PLL:
	case MMP_SSPA_CLK_VCXO:
		/* not support yet */
		return -EINVAL;
	default:
		return -EINVAL;
	}

	return 0;
}

static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
				 int source, unsigned int freq_in,
				 unsigned int freq_out)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
	struct device *dev = cpu_dai->component->dev;
	int ret = 0;

	if (dev->of_node)
		return -ENOTSUPP;

	switch (pll_id) {
	case MMP_SYSCLK:
		ret = clk_set_rate(sspa->sysclk, freq_out);
		if (ret)
			return ret;
		break;
	case MMP_SSPA_CLK:
		ret = clk_set_rate(sspa->clk, freq_out);
		if (ret)
			return ret;
		break;
	default:
		return -ENODEV;
	}

	return 0;
}

/*
 * Set up the sspa dai format.
 */
static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
				 unsigned int fmt)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);

	/* reset port settings */
	sspa->sp   = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
	sspa->ctrl = 0;

	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
	case SND_SOC_DAIFMT_BP_FP:
		sspa->sp |= SSPA_SP_MSL;
		break;
	case SND_SOC_DAIFMT_BC_FC:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		sspa->sp |= SSPA_SP_FSP;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		sspa->ctrl |= SSPA_CTL_XDATDLY(1);
		break;
	default:
		return -EINVAL;
	}

	/* Since we are configuring the timings for the format by hand
	 * we have to defer some things until hw_params() where we
	 * know parameters like the sample size.
	 */
	return 0;
}

/*
 * Set the SSPA audio DMA parameters and sample size.
 * Can be called multiple times by oss emulation.
 */
static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params,
			       struct snd_soc_dai *dai)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
	struct device *dev = dai->component->dev;
	u32 sspa_ctrl = sspa->ctrl;
	int bits;
	int bitval;

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		bits = 8;
		bitval = SSPA_CTL_8_BITS;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		bits = 16;
		bitval = SSPA_CTL_16_BITS;
		break;
	case SNDRV_PCM_FORMAT_S24_3LE:
		bits = 24;
		bitval = SSPA_CTL_24_BITS;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		bits = 32;
		bitval = SSPA_CTL_32_BITS;
		break;
	default:
		return -EINVAL;
	}

	sspa_ctrl &= ~SSPA_CTL_XPH;
	if (dev->of_node || params_channels(params) == 2)
		sspa_ctrl |= SSPA_CTL_XPH;

	sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
	sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);

	sspa_ctrl &= ~SSPA_CTL_XWDLEN2_MASK;
	sspa_ctrl |= SSPA_CTL_XWDLEN2(bitval);

	sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
	sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);

	sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
	sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);

	sspa->sp &= ~SSPA_SP_FWID_MASK;
	sspa->sp |= SSPA_SP_FWID(bits - 1);

	sspa->sp &= ~SSPA_TXSP_FPER_MASK;
	sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);

	if (dev->of_node) {
		clk_set_rate(sspa->clk, params_rate(params) *
					params_channels(params) * bits);
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		__raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
		__raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
	} else {
		__raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
		__raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
	}

	return 0;
}

static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
			     struct snd_soc_dai *dai)
{
	struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		/*
		 * whatever playback or capture, must enable rx.
		 * this is a hw issue, so need check if rx has been
		 * enabled or not; if has been enabled by another
		 * stream, do not enable again.
		 */
		if (!sspa->running_cnt)
			mmp_sspa_rx_enable(sspa);

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			mmp_sspa_tx_enable(sspa);

		sspa->running_cnt++;
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		sspa->running_cnt--;

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			mmp_sspa_tx_disable(sspa);

		/* have no capture stream, disable rx port */
		if (!sspa->running_cnt)
			mmp_sspa_rx_disable(sspa);
		break;

	default:
		ret = -EINVAL;
	}

	return ret;
}

static int mmp_sspa_probe(struct snd_soc_dai *dai)
{
	struct sspa_priv *sspa = dev_get_drvdata(dai->dev);

	snd_soc_dai_init_dma_data(dai,
				&sspa->playback_dma_data,
				&sspa->capture_dma_data);

	return 0;
}

#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
		SNDRV_PCM_FMTBIT_S16_LE | \
		SNDRV_PCM_FMTBIT_S24_3LE | \
		SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
	.startup	= mmp_sspa_startup,
	.shutdown	= mmp_sspa_shutdown,
	.trigger	= mmp_sspa_trigger,
	.hw_params	= mmp_sspa_hw_params,
	.set_sysclk	= mmp_sspa_set_dai_sysclk,
	.set_pll	= mmp_sspa_set_dai_pll,
	.set_fmt	= mmp_sspa_set_dai_fmt,
};

static struct snd_soc_dai_driver mmp_sspa_dai = {
	.probe = mmp_sspa_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 128,
		.rates = MMP_SSPA_RATES,
		.formats = MMP_SSPA_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = MMP_SSPA_RATES,
		.formats = MMP_SSPA_FORMATS,
	},
	.ops = &mmp_sspa_dai_ops,
};

#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP |	\
		SNDRV_PCM_INFO_MMAP_VALID |	\
		SNDRV_PCM_INFO_INTERLEAVED |	\
		SNDRV_PCM_INFO_PAUSE |		\
		SNDRV_PCM_INFO_RESUME |		\
		SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)

static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
	{
		.info			= MMP_PCM_INFO,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
	{
		.info			= MMP_PCM_INFO,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
};

static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
	.pcm_hardware = mmp_pcm_hardware,
	.prealloc_buffer_size = 4096,
};

static int mmp_pcm_mmap(struct snd_soc_component *component,
			struct snd_pcm_substream *substream,
			struct vm_area_struct *vma)
{
	vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	return remap_pfn_range(vma, vma->vm_start,
		substream->dma_buffer.addr >> PAGE_SHIFT,
		vma->vm_end - vma->vm_start, vma->vm_page_prot);
}

static int mmp_sspa_open(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream)
{
	struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);

	pm_runtime_get_sync(component->dev);

	/* we can only change the settings if the port is not in use */
	if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
	    (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
		dev_err(component->dev,
			"can't change hardware dai format: stream is in use\n");
		return -EBUSY;
	}

	__raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
	__raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);

	sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
	__raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
	__raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);

	/*
	 * FIXME: hw issue, for the tx serial port,
	 * can not config the master/slave mode;
	 * so must clean this bit.
	 * The master/slave mode has been set in the
	 * rx port.
	 */
	__raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);

	__raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
	__raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);

	return 0;
}

static int mmp_sspa_close(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream)
{
	pm_runtime_put_sync(component->dev);
	return 0;
}

static const struct snd_soc_component_driver mmp_sspa_component = {
	.name			= "mmp-sspa",
	.mmap			= mmp_pcm_mmap,
	.open			= mmp_sspa_open,
	.close			= mmp_sspa_close,
	.legacy_dai_naming	= 1,
};

static int asoc_mmp_sspa_probe(struct platform_device *pdev)
{
	struct sspa_priv *sspa;
	int ret;

	sspa = devm_kzalloc(&pdev->dev,
				sizeof(struct sspa_priv), GFP_KERNEL);
	if (!sspa)
		return -ENOMEM;

	if (pdev->dev.of_node) {
		sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
		if (IS_ERR(sspa->rx_base))
			return PTR_ERR(sspa->rx_base);

		sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
		if (IS_ERR(sspa->tx_base))
			return PTR_ERR(sspa->tx_base);

		sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
		if (IS_ERR(sspa->clk))
			return PTR_ERR(sspa->clk);

		sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
		if (IS_ERR(sspa->audio_clk))
			return PTR_ERR(sspa->audio_clk);
	} else {
		struct resource *res;

		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
		if (res == NULL)
			return -ENODEV;

		sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
		if (!sspa->rx_base)
			return -ENOMEM;

		sspa->tx_base = devm_ioremap(&pdev->dev,
					     res->start + 0x80, 0x30);
		if (!sspa->tx_base)
			return -ENOMEM;

		sspa->clk = devm_clk_get(&pdev->dev, NULL);
		if (IS_ERR(sspa->clk))
			return PTR_ERR(sspa->clk);

		sspa->audio_clk = clk_get(NULL, "mmp-audio");
		if (IS_ERR(sspa->audio_clk))
			return PTR_ERR(sspa->audio_clk);

		sspa->sysclk = clk_get(NULL, "mmp-sysclk");
		if (IS_ERR(sspa->sysclk)) {
			clk_put(sspa->audio_clk);
			return PTR_ERR(sspa->sysclk);
		}
	}
	platform_set_drvdata(pdev, sspa);

	sspa->playback_dma_data.maxburst = 4;
	sspa->capture_dma_data.maxburst = 4;
	/* You know, these addresses are actually ignored. */
	sspa->capture_dma_data.addr = SSPA_D;
	sspa->playback_dma_data.addr = 0x80 + SSPA_D;

	if (pdev->dev.of_node) {
		ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
						      &mmp_pcm_config, 0);
		if (ret)
			return ret;
	}

	ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
					      &mmp_sspa_dai, 1);
	if (ret)
		return ret;

	pm_runtime_enable(&pdev->dev);
	clk_prepare_enable(sspa->audio_clk);

	return 0;
}

static void asoc_mmp_sspa_remove(struct platform_device *pdev)
{
	struct sspa_priv *sspa = platform_get_drvdata(pdev);

	clk_disable_unprepare(sspa->audio_clk);
	pm_runtime_disable(&pdev->dev);

	if (pdev->dev.of_node)
		return;

	clk_put(sspa->audio_clk);
	clk_put(sspa->sysclk);
}

#ifdef CONFIG_OF
static const struct of_device_id mmp_sspa_of_match[] = {
	{ .compatible = "marvell,mmp-sspa" },
	{},
};

MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
#endif

static struct platform_driver asoc_mmp_sspa_driver = {
	.driver = {
		.name = "mmp-sspa-dai",
		.of_match_table = of_match_ptr(mmp_sspa_of_match),
	},
	.probe = asoc_mmp_sspa_probe,
	.remove_new = asoc_mmp_sspa_remove,
};

module_platform_driver(asoc_mmp_sspa_driver);

MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP SSPA SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-sspa-dai");