summaryrefslogtreecommitdiff
path: root/sound/soc/mediatek/common/mtk-afe-fe-dai.c
blob: c91e5f4cd902a931635f592dd75633a7118de862 (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
/*
 * mtk-afe-fe-dais.c  --  Mediatek afe fe dai operator
 *
 * Copyright (c) 2016 MediaTek Inc.
 * Author: Garlic Tseng <garlic.tseng@mediatek.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "mtk-afe-platform-driver.h"
#include "mtk-afe-fe-dai.h"
#include "mtk-base-afe.h"

#define AFE_BASE_END_OFFSET 8

static int mtk_regmap_update_bits(struct regmap *map, int reg,
			   unsigned int mask,
			   unsigned int val)
{
	if (reg < 0)
		return 0;
	return regmap_update_bits(map, reg, mask, val);
}

static int mtk_regmap_write(struct regmap *map, int reg, unsigned int val)
{
	if (reg < 0)
		return 0;
	return regmap_write(map, reg, val);
}

int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
		       struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int memif_num = rtd->cpu_dai->id;
	struct mtk_base_afe_memif *memif = &afe->memif[memif_num];
	const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware;
	int ret;

	memif->substream = substream;

	snd_pcm_hw_constraint_step(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
	/* enable agent */
	mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
			       1 << memif->data->agent_disable_shift,
			       0 << memif->data->agent_disable_shift);

	snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware);

	/*
	 * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
	 * smaller than period_size due to AFE's internal buffer.
	 * This easily leads to overrun when avail_min is period_size.
	 * One more period can hold the possible unread buffer.
	 */
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		int periods_max = mtk_afe_hardware->periods_max;

		ret = snd_pcm_hw_constraint_minmax(runtime,
						   SNDRV_PCM_HW_PARAM_PERIODS,
						   3, periods_max);
		if (ret < 0) {
			dev_err(afe->dev, "hw_constraint_minmax failed\n");
			return ret;
		}
	}

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0)
		dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");

	/* dynamic allocate irq to memif */
	if (memif->irq_usage < 0) {
		int irq_id = mtk_dynamic_irq_acquire(afe);

		if (irq_id != afe->irqs_size) {
			/* link */
			memif->irq_usage = irq_id;
		} else {
			dev_err(afe->dev, "%s() error: no more asys irq\n",
				__func__);
			ret = -EBUSY;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_startup);

void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
			 struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
	int irq_id;

	irq_id = memif->irq_usage;

	mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
			       1 << memif->data->agent_disable_shift,
			       1 << memif->data->agent_disable_shift);

	if (!memif->const_irq) {
		mtk_dynamic_irq_release(afe, irq_id);
		memif->irq_usage = -1;
		memif->substream = NULL;
	}
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown);

int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *params,
			 struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
	int msb_at_bit33 = 0;
	int ret, fs = 0;

	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	if (ret < 0)
		return ret;

	msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
	memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
	memif->buffer_size = substream->runtime->dma_bytes;

	/* start */
	mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
			 memif->phys_buf_addr);
	/* end */
	mtk_regmap_write(afe->regmap,
			 memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
			 memif->phys_buf_addr + memif->buffer_size - 1);

	/* set MSB to 33-bit */
	mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
			       1 << memif->data->msb_shift,
			       msb_at_bit33 << memif->data->msb_shift);

	/* set channel */
	if (memif->data->mono_shift >= 0) {
		unsigned int mono = (params_channels(params) == 1) ? 1 : 0;

		mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
				       1 << memif->data->mono_shift,
				       mono << memif->data->mono_shift);
	}

	/* set rate */
	if (memif->data->fs_shift < 0)
		return 0;

	fs = afe->memif_fs(substream, params_rate(params));

	if (fs < 0)
		return -EINVAL;

	mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
			       memif->data->fs_maskbit << memif->data->fs_shift,
			       fs << memif->data->fs_shift);

	return 0;
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params);

int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
		       struct snd_soc_dai *dai)
{
	return snd_pcm_lib_free_pages(substream);
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);

int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
		       struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime * const runtime = substream->runtime;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
	struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage];
	const struct mtk_base_irq_data *irq_data = irqs->irq_data;
	unsigned int counter = runtime->period_size;
	int fs;

	dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
		if (memif->data->enable_shift >= 0)
			mtk_regmap_update_bits(afe->regmap,
					       memif->data->enable_reg,
					       1 << memif->data->enable_shift,
					       1 << memif->data->enable_shift);

		/* set irq counter */
		mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
				       irq_data->irq_cnt_maskbit
				       << irq_data->irq_cnt_shift,
				       counter << irq_data->irq_cnt_shift);

		/* set irq fs */
		fs = afe->irq_fs(substream, runtime->rate);

		if (fs < 0)
			return -EINVAL;

		mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg,
				       irq_data->irq_fs_maskbit
				       << irq_data->irq_fs_shift,
				       fs << irq_data->irq_fs_shift);

		/* enable interrupt */
		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
				       1 << irq_data->irq_en_shift,
				       1 << irq_data->irq_en_shift);

		return 0;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
				       1 << memif->data->enable_shift, 0);
		/* disable interrupt */
		mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
				       1 << irq_data->irq_en_shift,
				       0 << irq_data->irq_en_shift);
		/* and clear pending IRQ */
		mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg,
				 1 << irq_data->irq_clr_shift);
		return 0;
	default:
		return -EINVAL;
	}
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger);

int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
		       struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd  = substream->private_data;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
	int hd_audio = 0;

	/* set hd mode */
	switch (substream->runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		hd_audio = 0;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		hd_audio = 1;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		hd_audio = 1;
		break;
	default:
		dev_err(afe->dev, "%s() error: unsupported format %d\n",
			__func__, substream->runtime->format);
		break;
	}

	mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
			       1 << memif->data->hd_shift,
			       hd_audio << memif->data->hd_shift);

	return 0;
}
EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare);

const struct snd_soc_dai_ops mtk_afe_fe_ops = {
	.startup	= mtk_afe_fe_startup,
	.shutdown	= mtk_afe_fe_shutdown,
	.hw_params	= mtk_afe_fe_hw_params,
	.hw_free	= mtk_afe_fe_hw_free,
	.prepare	= mtk_afe_fe_prepare,
	.trigger	= mtk_afe_fe_trigger,
};
EXPORT_SYMBOL_GPL(mtk_afe_fe_ops);

static DEFINE_MUTEX(irqs_lock);
int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe)
{
	int i;

	mutex_lock(&afe->irq_alloc_lock);
	for (i = 0; i < afe->irqs_size; ++i) {
		if (afe->irqs[i].irq_occupyed == 0) {
			afe->irqs[i].irq_occupyed = 1;
			mutex_unlock(&afe->irq_alloc_lock);
			return i;
		}
	}
	mutex_unlock(&afe->irq_alloc_lock);
	return afe->irqs_size;
}
EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire);

int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id)
{
	mutex_lock(&afe->irq_alloc_lock);
	if (irq_id >= 0 && irq_id < afe->irqs_size) {
		afe->irqs[irq_id].irq_occupyed = 0;
		mutex_unlock(&afe->irq_alloc_lock);
		return 0;
	}
	mutex_unlock(&afe->irq_alloc_lock);
	return -EINVAL;
}
EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release);

int mtk_afe_dai_suspend(struct snd_soc_dai *dai)
{
	struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
	struct device *dev = afe->dev;
	struct regmap *regmap = afe->regmap;
	int i;

	if (pm_runtime_status_suspended(dev) || afe->suspended)
		return 0;

	if (!afe->reg_back_up)
		afe->reg_back_up =
			devm_kcalloc(dev, afe->reg_back_up_list_num,
				     sizeof(unsigned int), GFP_KERNEL);

	for (i = 0; i < afe->reg_back_up_list_num; i++)
		regmap_read(regmap, afe->reg_back_up_list[i],
			    &afe->reg_back_up[i]);

	afe->suspended = true;
	afe->runtime_suspend(dev);
	return 0;
}
EXPORT_SYMBOL_GPL(mtk_afe_dai_suspend);

int mtk_afe_dai_resume(struct snd_soc_dai *dai)
{
	struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
	struct device *dev = afe->dev;
	struct regmap *regmap = afe->regmap;
	int i = 0;

	if (pm_runtime_status_suspended(dev) || !afe->suspended)
		return 0;

	afe->runtime_resume(dev);

	if (!afe->reg_back_up)
		dev_dbg(dev, "%s no reg_backup\n", __func__);

	for (i = 0; i < afe->reg_back_up_list_num; i++)
		mtk_regmap_write(regmap, afe->reg_back_up_list[i],
				 afe->reg_back_up[i]);

	afe->suspended = false;
	return 0;
}
EXPORT_SYMBOL_GPL(mtk_afe_dai_resume);

MODULE_DESCRIPTION("Mediatek simple fe dai operator");
MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
MODULE_LICENSE("GPL v2");