Boot Linux faster!

Check our new training course

Boot Linux faster!

Check our new training course
and Creative Commons CC-BY-SA
lecture and lab materials

Bootlin logo

Elixir Cross Referencer

  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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
 *         Kristoffer Karlsson <kristoffer.karlsson@stericsson.com>
 *         for ST-Ericsson.
 *
 * License terms:
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/mutex.h>

#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "ux500_pcm.h"
#include "ux500_msp_dai.h"
#include "mop500_ab8500.h"
#include "../codecs/ab8500-codec.h"

#define TX_SLOT_MONO	0x0008
#define TX_SLOT_STEREO	0x000a
#define RX_SLOT_MONO	0x0001
#define RX_SLOT_STEREO	0x0003
#define TX_SLOT_8CH	0x00FF
#define RX_SLOT_8CH	0x00FF

#define DEF_TX_SLOTS	TX_SLOT_STEREO
#define DEF_RX_SLOTS	RX_SLOT_MONO

#define DRIVERMODE_NORMAL	0
#define DRIVERMODE_CODEC_ONLY	1

/* Slot configuration */
static unsigned int tx_slots = DEF_TX_SLOTS;
static unsigned int rx_slots = DEF_RX_SLOTS;

/* Configuration consistency parameters */
static DEFINE_MUTEX(mop500_ab8500_params_lock);
static unsigned long mop500_ab8500_usage;
static int mop500_ab8500_rate;
static int mop500_ab8500_channels;

/* Clocks */
static const char * const enum_mclk[] = {
	"SYSCLK",
	"ULPCLK"
};
enum mclk {
	MCLK_SYSCLK,
	MCLK_ULPCLK,
};

static SOC_ENUM_SINGLE_EXT_DECL(soc_enum_mclk, enum_mclk);

/* Private data for machine-part MOP500<->AB8500 */
struct mop500_ab8500_drvdata {
	/* Clocks */
	enum mclk mclk_sel;
	struct clk *clk_ptr_intclk;
	struct clk *clk_ptr_sysclk;
	struct clk *clk_ptr_ulpclk;
};

static inline const char *get_mclk_str(enum mclk mclk_sel)
{
	switch (mclk_sel) {
	case MCLK_SYSCLK:
		return "SYSCLK";
	case MCLK_ULPCLK:
		return "ULPCLK";
	default:
		return "Unknown";
	}
}

static int mop500_ab8500_set_mclk(struct device *dev,
				struct mop500_ab8500_drvdata *drvdata)
{
	int status;
	struct clk *clk_ptr;

	if (IS_ERR(drvdata->clk_ptr_intclk)) {
		dev_err(dev,
			"%s: ERROR: intclk not initialized!\n", __func__);
		return -EIO;
	}

	switch (drvdata->mclk_sel) {
	case MCLK_SYSCLK:
		clk_ptr = drvdata->clk_ptr_sysclk;
		break;
	case MCLK_ULPCLK:
		clk_ptr = drvdata->clk_ptr_ulpclk;
		break;
	default:
		return -EINVAL;
	}

	if (IS_ERR(clk_ptr)) {
		dev_err(dev, "%s: ERROR: %s not initialized!\n", __func__,
			get_mclk_str(drvdata->mclk_sel));
		return -EIO;
	}

	status = clk_set_parent(drvdata->clk_ptr_intclk, clk_ptr);
	if (status)
		dev_err(dev,
			"%s: ERROR: Setting intclk parent to %s failed (ret = %d)!",
			__func__, get_mclk_str(drvdata->mclk_sel), status);
	else
		dev_dbg(dev,
			"%s: intclk parent changed to %s.\n",
			__func__, get_mclk_str(drvdata->mclk_sel));

	return status;
}

/*
 * Control-events
 */

static int mclk_input_control_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
	struct mop500_ab8500_drvdata *drvdata =
				snd_soc_card_get_drvdata(card);

	ucontrol->value.enumerated.item[0] = drvdata->mclk_sel;

	return 0;
}

static int mclk_input_control_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
	struct mop500_ab8500_drvdata *drvdata =
				snd_soc_card_get_drvdata(card);
	unsigned int val = ucontrol->value.enumerated.item[0];

	if (val > (unsigned int)MCLK_ULPCLK)
		return -EINVAL;
	if (drvdata->mclk_sel == val)
		return 0;

	drvdata->mclk_sel = val;

	return 1;
}

/*
 * Controls
 */

static struct snd_kcontrol_new mop500_ab8500_ctrls[] = {
	SOC_ENUM_EXT("Master Clock Select",
		soc_enum_mclk,
		mclk_input_control_get, mclk_input_control_put),
	SOC_DAPM_PIN_SWITCH("Headset Left"),
	SOC_DAPM_PIN_SWITCH("Headset Right"),
	SOC_DAPM_PIN_SWITCH("Earpiece"),
	SOC_DAPM_PIN_SWITCH("Speaker Left"),
	SOC_DAPM_PIN_SWITCH("Speaker Right"),
	SOC_DAPM_PIN_SWITCH("LineOut Left"),
	SOC_DAPM_PIN_SWITCH("LineOut Right"),
	SOC_DAPM_PIN_SWITCH("Vibra 1"),
	SOC_DAPM_PIN_SWITCH("Vibra 2"),
	SOC_DAPM_PIN_SWITCH("Mic 1"),
	SOC_DAPM_PIN_SWITCH("Mic 2"),
	SOC_DAPM_PIN_SWITCH("LineIn Left"),
	SOC_DAPM_PIN_SWITCH("LineIn Right"),
	SOC_DAPM_PIN_SWITCH("DMic 1"),
	SOC_DAPM_PIN_SWITCH("DMic 2"),
	SOC_DAPM_PIN_SWITCH("DMic 3"),
	SOC_DAPM_PIN_SWITCH("DMic 4"),
	SOC_DAPM_PIN_SWITCH("DMic 5"),
	SOC_DAPM_PIN_SWITCH("DMic 6"),
};

/* ASoC */

static int mop500_ab8500_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);

	/* Set audio-clock source */
	return mop500_ab8500_set_mclk(rtd->card->dev,
				snd_soc_card_get_drvdata(rtd->card));
}

static void mop500_ab8500_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct device *dev = rtd->card->dev;

	dev_dbg(dev, "%s: Enter\n", __func__);

	/* Reset slots configuration to default(s) */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		tx_slots = DEF_TX_SLOTS;
	else
		rx_slots = DEF_RX_SLOTS;
}

static int mop500_ab8500_hw_params(struct snd_pcm_substream *substream,
			struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
	struct device *dev = rtd->card->dev;
	unsigned int fmt;
	int channels, ret = 0, driver_mode, slots;
	unsigned int sw_codec, sw_cpu;
	bool is_playback;

	dev_dbg(dev, "%s: Enter\n", __func__);

	dev_dbg(dev, "%s: substream->pcm->name = %s\n"
		"substream->pcm->id = %s.\n"
		"substream->name = %s.\n"
		"substream->number = %d.\n",
		__func__,
		substream->pcm->name,
		substream->pcm->id,
		substream->name,
		substream->number);

	/* Ensure configuration consistency between DAIs */
	mutex_lock(&mop500_ab8500_params_lock);
	if (mop500_ab8500_usage) {
		if (mop500_ab8500_rate != params_rate(params) ||
		    mop500_ab8500_channels != params_channels(params)) {
			mutex_unlock(&mop500_ab8500_params_lock);
			return -EBUSY;
		}
	} else {
		mop500_ab8500_rate = params_rate(params);
		mop500_ab8500_channels = params_channels(params);
	}
	__set_bit(cpu_dai->id, &mop500_ab8500_usage);
	mutex_unlock(&mop500_ab8500_params_lock);

	channels = params_channels(params);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S32_LE:
		sw_cpu = 32;
		break;

	case SNDRV_PCM_FORMAT_S16_LE:
		sw_cpu = 16;
		break;

	default:
		return -EINVAL;
	}

	/* Setup codec depending on driver-mode */
	if (channels == 8)
		driver_mode = DRIVERMODE_CODEC_ONLY;
	else
		driver_mode = DRIVERMODE_NORMAL;
	dev_dbg(dev, "%s: Driver-mode: %s.\n", __func__,
		(driver_mode == DRIVERMODE_NORMAL) ? "NORMAL" : "CODEC_ONLY");

	/* Setup format */

	if (driver_mode == DRIVERMODE_NORMAL) {
		fmt = SND_SOC_DAIFMT_DSP_A |
			SND_SOC_DAIFMT_CBM_CFM |
			SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_CONT;
	} else {
		fmt = SND_SOC_DAIFMT_DSP_A |
			SND_SOC_DAIFMT_CBM_CFM |
			SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_GATED;
	}

	ret = snd_soc_runtime_set_dai_fmt(rtd, fmt);
	if (ret)
		return ret;

	/* Setup TDM-slots */

	is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
	switch (channels) {
	case 1:
		slots = 16;
		tx_slots = (is_playback) ? TX_SLOT_MONO : 0;
		rx_slots = (is_playback) ? 0 : RX_SLOT_MONO;
		break;
	case 2:
		slots = 16;
		tx_slots = (is_playback) ? TX_SLOT_STEREO : 0;
		rx_slots = (is_playback) ? 0 : RX_SLOT_STEREO;
		break;
	case 8:
		slots = 16;
		tx_slots = (is_playback) ? TX_SLOT_8CH : 0;
		rx_slots = (is_playback) ? 0 : RX_SLOT_8CH;
		break;
	default:
		return -EINVAL;
	}

	if (driver_mode == DRIVERMODE_NORMAL)
		sw_codec = sw_cpu;
	else
		sw_codec = 20;

	dev_dbg(dev, "%s: CPU-DAI TDM: TX=0x%04X RX=0x%04x\n", __func__,
		tx_slots, rx_slots);
	ret = snd_soc_dai_set_tdm_slot(cpu_dai, tx_slots, rx_slots, slots,
				sw_cpu);
	if (ret)
		return ret;

	dev_dbg(dev, "%s: CODEC-DAI TDM: TX=0x%04X RX=0x%04x\n", __func__,
		tx_slots, rx_slots);
	ret = snd_soc_dai_set_tdm_slot(codec_dai, tx_slots, rx_slots, slots,
				sw_codec);
	if (ret)
		return ret;

	return 0;
}

static int mop500_ab8500_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);

	mutex_lock(&mop500_ab8500_params_lock);
	__clear_bit(cpu_dai->id, &mop500_ab8500_usage);
	mutex_unlock(&mop500_ab8500_params_lock);

	return 0;
}

struct snd_soc_ops mop500_ab8500_ops[] = {
	{
		.hw_params = mop500_ab8500_hw_params,
		.hw_free = mop500_ab8500_hw_free,
		.startup = mop500_ab8500_startup,
		.shutdown = mop500_ab8500_shutdown,
	}
};

int mop500_ab8500_machine_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
	struct device *dev = rtd->card->dev;
	struct mop500_ab8500_drvdata *drvdata;
	int ret;

	dev_dbg(dev, "%s Enter.\n", __func__);

	/* Create driver private-data struct */
	drvdata = devm_kzalloc(dev, sizeof(struct mop500_ab8500_drvdata),
			GFP_KERNEL);

	if (!drvdata)
		return -ENOMEM;

	snd_soc_card_set_drvdata(rtd->card, drvdata);

	/* Setup clocks */

	drvdata->clk_ptr_sysclk = clk_get(dev, "sysclk");
	if (IS_ERR(drvdata->clk_ptr_sysclk))
		dev_warn(dev, "%s: WARNING: clk_get failed for 'sysclk'!\n",
			__func__);
	drvdata->clk_ptr_ulpclk = clk_get(dev, "ulpclk");
	if (IS_ERR(drvdata->clk_ptr_ulpclk))
		dev_warn(dev, "%s: WARNING: clk_get failed for 'ulpclk'!\n",
			__func__);
	drvdata->clk_ptr_intclk = clk_get(dev, "intclk");
	if (IS_ERR(drvdata->clk_ptr_intclk))
		dev_warn(dev, "%s: WARNING: clk_get failed for 'intclk'!\n",
			__func__);

	/* Set intclk default parent to ulpclk */
	drvdata->mclk_sel = MCLK_ULPCLK;
	ret = mop500_ab8500_set_mclk(dev, drvdata);
	if (ret < 0)
		dev_warn(dev, "%s: WARNING: mop500_ab8500_set_mclk!\n",
			__func__);

	drvdata->mclk_sel = MCLK_ULPCLK;

	/* Add controls */
	ret = snd_soc_add_card_controls(rtd->card, mop500_ab8500_ctrls,
			ARRAY_SIZE(mop500_ab8500_ctrls));
	if (ret < 0) {
		pr_err("%s: Failed to add machine-controls (%d)!\n",
				__func__, ret);
		return ret;
	}

	ret = snd_soc_dapm_disable_pin(dapm, "Earpiece");
	ret |= snd_soc_dapm_disable_pin(dapm, "Speaker Left");
	ret |= snd_soc_dapm_disable_pin(dapm, "Speaker Right");
	ret |= snd_soc_dapm_disable_pin(dapm, "LineOut Left");
	ret |= snd_soc_dapm_disable_pin(dapm, "LineOut Right");
	ret |= snd_soc_dapm_disable_pin(dapm, "Vibra 1");
	ret |= snd_soc_dapm_disable_pin(dapm, "Vibra 2");
	ret |= snd_soc_dapm_disable_pin(dapm, "Mic 1");
	ret |= snd_soc_dapm_disable_pin(dapm, "Mic 2");
	ret |= snd_soc_dapm_disable_pin(dapm, "LineIn Left");
	ret |= snd_soc_dapm_disable_pin(dapm, "LineIn Right");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 1");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 2");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 3");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 4");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 5");
	ret |= snd_soc_dapm_disable_pin(dapm, "DMic 6");

	return ret;
}

void mop500_ab8500_remove(struct snd_soc_card *card)
{
	struct mop500_ab8500_drvdata *drvdata = snd_soc_card_get_drvdata(card);

	if (drvdata->clk_ptr_sysclk != NULL)
		clk_put(drvdata->clk_ptr_sysclk);
	if (drvdata->clk_ptr_ulpclk != NULL)
		clk_put(drvdata->clk_ptr_ulpclk);
	if (drvdata->clk_ptr_intclk != NULL)
		clk_put(drvdata->clk_ptr_intclk);

	snd_soc_card_set_drvdata(card, drvdata);
}