aboutsummaryrefslogtreecommitdiff
path: root/sound/soc/blackfin/bf5xx-i2s.c
blob: 39d774839b3ec064758604fbac83d5bfed2755bc (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
/*
 * File:         sound/soc/blackfin/bf5xx-i2s.c
 * Author:       Cliff Cai <Cliff.Cai@analog.com>
 *
 * Created:      Tue June 06 2008
 * Description:  Blackfin I2S CPU DAI driver
 *
 * Modified:
 *               Copyright 2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>

#include "bf5xx-sport.h"
#include "bf5xx-i2s-pcm.h"

struct bf5xx_i2s_port {
	u16 tcr1;
	u16 rcr1;
	u16 tcr2;
	u16 rcr2;
	int configured;

	unsigned int slots;
	unsigned int tx_mask;
	unsigned int rx_mask;

	struct bf5xx_i2s_pcm_data tx_dma_data;
	struct bf5xx_i2s_pcm_data rx_dma_data;
};

static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
		unsigned int fmt)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
	int ret = 0;

	/* interface format:support I2S,slave mode */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		bf5xx_i2s->tcr1 |= TFSR | TCKFE;
		bf5xx_i2s->rcr1 |= RFSR | RCKFE;
		bf5xx_i2s->tcr2 |= TSFSE;
		bf5xx_i2s->rcr2 |= RSFSE;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		bf5xx_i2s->tcr1 |= TFSR;
		bf5xx_i2s->rcr1 |= RFSR;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		ret = -EINVAL;
		break;
	default:
		dev_err(cpu_dai->dev, "%s: Unknown DAI format type\n",
			__func__);
		ret = -EINVAL;
		break;
	}

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
	case SND_SOC_DAIFMT_CBM_CFS:
	case SND_SOC_DAIFMT_CBS_CFM:
		ret = -EINVAL;
		break;
	default:
		dev_err(cpu_dai->dev, "%s: Unknown DAI master type\n",
			__func__);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
	int ret = 0;

	bf5xx_i2s->tcr2 &= ~0x1f;
	bf5xx_i2s->rcr2 &= ~0x1f;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		bf5xx_i2s->tcr2 |= 7;
		bf5xx_i2s->rcr2 |= 7;
		sport_handle->wdsize = 1;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		bf5xx_i2s->tcr2 |= 15;
		bf5xx_i2s->rcr2 |= 15;
		sport_handle->wdsize = 2;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		bf5xx_i2s->tcr2 |= 23;
		bf5xx_i2s->rcr2 |= 23;
		sport_handle->wdsize = 3;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		bf5xx_i2s->tcr2 |= 31;
		bf5xx_i2s->rcr2 |= 31;
		sport_handle->wdsize = 4;
		break;
	}

	if (!bf5xx_i2s->configured) {
		/*
		 * TX and RX are not independent,they are enabled at the
		 * same time, even if only one side is running. So, we
		 * need to configure both of them at the time when the first
		 * stream is opened.
		 *
		 * CPU DAI:slave mode.
		 */
		bf5xx_i2s->configured = 1;
		ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
				      bf5xx_i2s->rcr2, 0, 0);
		if (ret) {
			dev_err(dai->dev, "SPORT is busy!\n");
			return -EBUSY;
		}

		ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
				      bf5xx_i2s->tcr2, 0, 0);
		if (ret) {
			dev_err(dai->dev, "SPORT is busy!\n");
			return -EBUSY;
		}
	}

	return 0;
}

static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;

	dev_dbg(dai->dev, "%s enter\n", __func__);
	/* No active stream, SPORT is allowed to be configured again. */
	if (!dai->active)
		bf5xx_i2s->configured = 0;
}

static int bf5xx_i2s_set_channel_map(struct snd_soc_dai *dai,
		unsigned int tx_num, unsigned int *tx_slot,
		unsigned int rx_num, unsigned int *rx_slot)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
	unsigned int tx_mapped = 0, rx_mapped = 0;
	unsigned int slot;
	int i;

	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
			(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
		return -EINVAL;

	for (i = 0; i < tx_num; i++) {
		slot = tx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(tx_mapped & (1 << slot)))) {
			bf5xx_i2s->tx_dma_data.map[i] = slot;
			tx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}
	for (i = 0; i < rx_num; i++) {
		slot = rx_slot[i];
		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
				(!(rx_mapped & (1 << slot)))) {
			bf5xx_i2s->rx_dma_data.map[i] = slot;
			rx_mapped |= 1 << slot;
		} else
			return -EINVAL;
	}

	return 0;
}

static int bf5xx_i2s_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
	unsigned int rx_mask, int slots, int width)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;

	if (slots % 8 != 0 || slots > 8)
		return -EINVAL;

	if (width != 32)
		return -EINVAL;

	bf5xx_i2s->slots = slots;
	bf5xx_i2s->tx_mask = tx_mask;
	bf5xx_i2s->rx_mask = rx_mask;

	bf5xx_i2s->tx_dma_data.tdm_mode = slots != 0;
	bf5xx_i2s->rx_dma_data.tdm_mode = slots != 0;

	return sport_set_multichannel(sport_handle, slots, tx_mask, rx_mask, 0);
}

#ifdef CONFIG_PM
static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);

	dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);

	if (dai->capture_active)
		sport_rx_stop(sport_handle);
	if (dai->playback_active)
		sport_tx_stop(sport_handle);
	return 0;
}

static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
	int ret;

	dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);

	ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
				      bf5xx_i2s->rcr2, 0, 0);
	if (ret) {
		dev_err(dai->dev, "SPORT is busy!\n");
		return -EBUSY;
	}

	ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
				      bf5xx_i2s->tcr2, 0, 0);
	if (ret) {
		dev_err(dai->dev, "SPORT is busy!\n");
		return -EBUSY;
	}

	return sport_set_multichannel(sport_handle, bf5xx_i2s->slots,
			bf5xx_i2s->tx_mask, bf5xx_i2s->rx_mask, 0);
}

#else
#define bf5xx_i2s_suspend	NULL
#define bf5xx_i2s_resume	NULL
#endif

static int bf5xx_i2s_dai_probe(struct snd_soc_dai *dai)
{
	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
	unsigned int i;

	for (i = 0; i < BFIN_TDM_DAI_MAX_SLOTS; i++) {
		bf5xx_i2s->tx_dma_data.map[i] = i;
		bf5xx_i2s->rx_dma_data.map[i] = i;
	}

	dai->playback_dma_data = &bf5xx_i2s->tx_dma_data;
	dai->capture_dma_data = &bf5xx_i2s->rx_dma_data;

	return 0;
}

#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
		SNDRV_PCM_RATE_96000)

#define BF5XX_I2S_FORMATS \
	(SNDRV_PCM_FMTBIT_S8 | \
	 SNDRV_PCM_FMTBIT_S16_LE | \
	 SNDRV_PCM_FMTBIT_S24_LE | \
	 SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
	.shutdown	 = bf5xx_i2s_shutdown,
	.hw_params	 = bf5xx_i2s_hw_params,
	.set_fmt	 = bf5xx_i2s_set_dai_fmt,
	.set_tdm_slot	 = bf5xx_i2s_set_tdm_slot,
	.set_channel_map = bf5xx_i2s_set_channel_map,
};

static struct snd_soc_dai_driver bf5xx_i2s_dai = {
	.probe = bf5xx_i2s_dai_probe,
	.suspend = bf5xx_i2s_suspend,
	.resume = bf5xx_i2s_resume,
	.playback = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = BF5XX_I2S_RATES,
		.formats = BF5XX_I2S_FORMATS,},
	.capture = {
		.channels_min = 2,
		.channels_max = 8,
		.rates = BF5XX_I2S_RATES,
		.formats = BF5XX_I2S_FORMATS,},
	.ops = &bf5xx_i2s_dai_ops,
};

static const struct snd_soc_component_driver bf5xx_i2s_component = {
	.name		= "bf5xx-i2s",
};

static int bf5xx_i2s_probe(struct platform_device *pdev)
{
	struct sport_device *sport_handle;
	int ret;

	/* configure SPORT for I2S */
	sport_handle = sport_init(pdev, 4, 8 * sizeof(u32),
		sizeof(struct bf5xx_i2s_port));
	if (!sport_handle)
		return -ENODEV;

	/* register with the ASoC layers */
	ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
					 &bf5xx_i2s_dai, 1);
	if (ret) {
		dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
		sport_done(sport_handle);
		return ret;
	}

	return 0;
}

static int bf5xx_i2s_remove(struct platform_device *pdev)
{
	struct sport_device *sport_handle = platform_get_drvdata(pdev);

	dev_dbg(&pdev->dev, "%s enter\n", __func__);

	snd_soc_unregister_component(&pdev->dev);
	sport_done(sport_handle);

	return 0;
}

static struct platform_driver bfin_i2s_driver = {
	.probe  = bf5xx_i2s_probe,
	.remove = bf5xx_i2s_remove,
	.driver = {
		.name = "bfin-i2s",
		.owner = THIS_MODULE,
	},
};

module_platform_driver(bfin_i2s_driver);

/* Module information */
MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
MODULE_LICENSE("GPL");