aboutsummaryrefslogtreecommitdiff
path: root/sound/soc/omap/omap-mcbsp-st.c
blob: 1a3fe854e8568a91826212116d7ce58c9336acfc (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
// SPDX-License-Identifier: GPL-2.0
/*
 * McBSP Sidetone support
 *
 * Copyright (C) 2004 Nokia Corporation
 * Author: Samuel Ortiz <samuel.ortiz@nokia.com>
 *
 * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
 *          Peter Ujfalusi <peter.ujfalusi@ti.com>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>

#include "omap-mcbsp.h"
#include "omap-mcbsp-priv.h"

/* OMAP3 sidetone control registers */
#define OMAP_ST_REG_REV		0x00
#define OMAP_ST_REG_SYSCONFIG	0x10
#define OMAP_ST_REG_IRQSTATUS	0x18
#define OMAP_ST_REG_IRQENABLE	0x1C
#define OMAP_ST_REG_SGAINCR	0x24
#define OMAP_ST_REG_SFIRCR	0x28
#define OMAP_ST_REG_SSELCR	0x2C

/********************** McBSP SSELCR bit definitions ***********************/
#define SIDETONEEN		BIT(10)

/********************** McBSP Sidetone SYSCONFIG bit definitions ***********/
#define ST_AUTOIDLE		BIT(0)

/********************** McBSP Sidetone SGAINCR bit definitions *************/
#define ST_CH0GAIN(value)	((value) & 0xffff)	/* Bits 0:15 */
#define ST_CH1GAIN(value)	(((value) & 0xffff) << 16) /* Bits 16:31 */

/********************** McBSP Sidetone SFIRCR bit definitions **************/
#define ST_FIRCOEFF(value)	((value) & 0xffff)	/* Bits 0:15 */

/********************** McBSP Sidetone SSELCR bit definitions **************/
#define ST_SIDETONEEN		BIT(0)
#define ST_COEFFWREN		BIT(1)
#define ST_COEFFWRDONE		BIT(2)

struct omap_mcbsp_st_data {
	void __iomem *io_base_st;
	struct clk *mcbsp_iclk;
	bool running;
	bool enabled;
	s16 taps[128];	/* Sidetone filter coefficients */
	int nr_taps;	/* Number of filter coefficients in use */
	s16 ch0gain;
	s16 ch1gain;
};

static void omap_mcbsp_st_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
{
	writel_relaxed(val, mcbsp->st_data->io_base_st + reg);
}

static int omap_mcbsp_st_read(struct omap_mcbsp *mcbsp, u16 reg)
{
	return readl_relaxed(mcbsp->st_data->io_base_st + reg);
}

#define MCBSP_ST_READ(mcbsp, reg) omap_mcbsp_st_read(mcbsp, OMAP_ST_REG_##reg)
#define MCBSP_ST_WRITE(mcbsp, reg, val) \
			omap_mcbsp_st_write(mcbsp, OMAP_ST_REG_##reg, val)

static void omap_mcbsp_st_on(struct omap_mcbsp *mcbsp)
{
	unsigned int w;

	if (mcbsp->pdata->force_ick_on)
		mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, true);

	/* Disable Sidetone clock auto-gating for normal operation */
	w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
	MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w & ~(ST_AUTOIDLE));

	/* Enable McBSP Sidetone */
	w = MCBSP_READ(mcbsp, SSELCR);
	MCBSP_WRITE(mcbsp, SSELCR, w | SIDETONEEN);

	/* Enable Sidetone from Sidetone Core */
	w = MCBSP_ST_READ(mcbsp, SSELCR);
	MCBSP_ST_WRITE(mcbsp, SSELCR, w | ST_SIDETONEEN);
}

static void omap_mcbsp_st_off(struct omap_mcbsp *mcbsp)
{
	unsigned int w;

	w = MCBSP_ST_READ(mcbsp, SSELCR);
	MCBSP_ST_WRITE(mcbsp, SSELCR, w & ~(ST_SIDETONEEN));

	w = MCBSP_READ(mcbsp, SSELCR);
	MCBSP_WRITE(mcbsp, SSELCR, w & ~(SIDETONEEN));

	/* Enable Sidetone clock auto-gating to reduce power consumption */
	w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
	MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w | ST_AUTOIDLE);

	if (mcbsp->pdata->force_ick_on)
		mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, false);
}

static void omap_mcbsp_st_fir_write(struct omap_mcbsp *mcbsp, s16 *fir)
{
	u16 val, i;

	val = MCBSP_ST_READ(mcbsp, SSELCR);

	if (val & ST_COEFFWREN)
		MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));

	MCBSP_ST_WRITE(mcbsp, SSELCR, val | ST_COEFFWREN);

	for (i = 0; i < 128; i++)
		MCBSP_ST_WRITE(mcbsp, SFIRCR, fir[i]);

	i = 0;

	val = MCBSP_ST_READ(mcbsp, SSELCR);
	while (!(val & ST_COEFFWRDONE) && (++i < 1000))
		val = MCBSP_ST_READ(mcbsp, SSELCR);

	MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));

	if (i == 1000)
		dev_err(mcbsp->dev, "McBSP FIR load error!\n");
}

static void omap_mcbsp_st_chgain(struct omap_mcbsp *mcbsp)
{
	u16 w;
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;

	w = MCBSP_ST_READ(mcbsp, SSELCR);

	MCBSP_ST_WRITE(mcbsp, SGAINCR, ST_CH0GAIN(st_data->ch0gain) |
		       ST_CH1GAIN(st_data->ch1gain));
}

static int omap_mcbsp_st_set_chgain(struct omap_mcbsp *mcbsp, int channel,
				    s16 chgain)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
	int ret = 0;

	if (!st_data)
		return -ENOENT;

	spin_lock_irq(&mcbsp->lock);
	if (channel == 0)
		st_data->ch0gain = chgain;
	else if (channel == 1)
		st_data->ch1gain = chgain;
	else
		ret = -EINVAL;

	if (st_data->enabled)
		omap_mcbsp_st_chgain(mcbsp);
	spin_unlock_irq(&mcbsp->lock);

	return ret;
}

static int omap_mcbsp_st_get_chgain(struct omap_mcbsp *mcbsp, int channel,
				    s16 *chgain)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
	int ret = 0;

	if (!st_data)
		return -ENOENT;

	spin_lock_irq(&mcbsp->lock);
	if (channel == 0)
		*chgain = st_data->ch0gain;
	else if (channel == 1)
		*chgain = st_data->ch1gain;
	else
		ret = -EINVAL;
	spin_unlock_irq(&mcbsp->lock);

	return ret;
}

static int omap_mcbsp_st_enable(struct omap_mcbsp *mcbsp)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;

	if (!st_data)
		return -ENODEV;

	spin_lock_irq(&mcbsp->lock);
	st_data->enabled = 1;
	omap_mcbsp_st_start(mcbsp);
	spin_unlock_irq(&mcbsp->lock);

	return 0;
}

static int omap_mcbsp_st_disable(struct omap_mcbsp *mcbsp)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
	int ret = 0;

	if (!st_data)
		return -ENODEV;

	spin_lock_irq(&mcbsp->lock);
	omap_mcbsp_st_stop(mcbsp);
	st_data->enabled = 0;
	spin_unlock_irq(&mcbsp->lock);

	return ret;
}

static int omap_mcbsp_st_is_enabled(struct omap_mcbsp *mcbsp)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;

	if (!st_data)
		return -ENODEV;

	return st_data->enabled;
}

static ssize_t st_taps_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
	ssize_t status = 0;
	int i;

	spin_lock_irq(&mcbsp->lock);
	for (i = 0; i < st_data->nr_taps; i++)
		status += sprintf(&buf[status], (i ? ", %d" : "%d"),
				  st_data->taps[i]);
	if (i)
		status += sprintf(&buf[status], "\n");
	spin_unlock_irq(&mcbsp->lock);

	return status;
}

static ssize_t st_taps_store(struct device *dev,
			     struct device_attribute *attr,
			     const char *buf, size_t size)
{
	struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
	int val, tmp, status, i = 0;

	spin_lock_irq(&mcbsp->lock);
	memset(st_data->taps, 0, sizeof(st_data->taps));
	st_data->nr_taps = 0;

	do {
		status = sscanf(buf, "%d%n", &val, &tmp);
		if (status < 0 || status == 0) {
			size = -EINVAL;
			goto out;
		}
		if (val < -32768 || val > 32767) {
			size = -EINVAL;
			goto out;
		}
		st_data->taps[i++] = val;
		buf += tmp;
		if (*buf != ',')
			break;
		buf++;
	} while (1);

	st_data->nr_taps = i;

out:
	spin_unlock_irq(&mcbsp->lock);

	return size;
}

static DEVICE_ATTR_RW(st_taps);

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

static const struct attribute_group sidetone_attr_group = {
	.attrs = (struct attribute **)sidetone_attrs,
};

int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;

	if (st_data->enabled && !st_data->running) {
		omap_mcbsp_st_fir_write(mcbsp, st_data->taps);
		omap_mcbsp_st_chgain(mcbsp);

		if (!mcbsp->free) {
			omap_mcbsp_st_on(mcbsp);
			st_data->running = 1;
		}
	}

	return 0;
}

int omap_mcbsp_st_stop(struct omap_mcbsp *mcbsp)
{
	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;

	if (st_data->running) {
		if (!mcbsp->free) {
			omap_mcbsp_st_off(mcbsp);
			st_data->running = 0;
		}
	}

	return 0;
}

int omap_mcbsp_st_init(struct platform_device *pdev)
{
	struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
	struct omap_mcbsp_st_data *st_data;
	struct resource *res;
	int ret;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sidetone");
	if (!res)
		return 0;

	st_data = devm_kzalloc(mcbsp->dev, sizeof(*mcbsp->st_data), GFP_KERNEL);
	if (!st_data)
		return -ENOMEM;

	st_data->mcbsp_iclk = clk_get(mcbsp->dev, "ick");
	if (IS_ERR(st_data->mcbsp_iclk)) {
		dev_warn(mcbsp->dev,
			 "Failed to get ick, sidetone might be broken\n");
		st_data->mcbsp_iclk = NULL;
	}

	st_data->io_base_st = devm_ioremap(mcbsp->dev, res->start,
					   resource_size(res));
	if (!st_data->io_base_st)
		return -ENOMEM;

	ret = sysfs_create_group(&mcbsp->dev->kobj, &sidetone_attr_group);
	if (ret)
		return ret;

	mcbsp->st_data = st_data;

	return 0;
}

void omap_mcbsp_st_cleanup(struct platform_device *pdev)
{
	struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);

	if (mcbsp->st_data) {
		sysfs_remove_group(&mcbsp->dev->kobj, &sidetone_attr_group);
		clk_put(mcbsp->st_data->mcbsp_iclk);
	}
}

static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = min;
	uinfo->value.integer.max = max;
	return 0;
}

#define OMAP_MCBSP_ST_CHANNEL_VOLUME(channel)				\
static int								\
omap_mcbsp_set_st_ch##channel##_volume(struct snd_kcontrol *kc,		\
				       struct snd_ctl_elem_value *uc)	\
{									\
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc);		\
	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);	\
	struct soc_mixer_control *mc =					\
		(struct soc_mixer_control *)kc->private_value;		\
	int max = mc->max;						\
	int min = mc->min;						\
	int val = uc->value.integer.value[0];				\
									\
	if (val < min || val > max)					\
		return -EINVAL;						\
									\
	/* OMAP McBSP implementation uses index values 0..4 */		\
	return omap_mcbsp_st_set_chgain(mcbsp, channel, val);		\
}									\
									\
static int								\
omap_mcbsp_get_st_ch##channel##_volume(struct snd_kcontrol *kc,		\
				       struct snd_ctl_elem_value *uc)	\
{									\
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc);		\
	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);	\
	s16 chgain;							\
									\
	if (omap_mcbsp_st_get_chgain(mcbsp, channel, &chgain))		\
		return -EAGAIN;						\
									\
	uc->value.integer.value[0] = chgain;				\
	return 0;							\
}

OMAP_MCBSP_ST_CHANNEL_VOLUME(0)
OMAP_MCBSP_ST_CHANNEL_VOLUME(1)

static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
				  struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
	u8 value = ucontrol->value.integer.value[0];

	if (value == omap_mcbsp_st_is_enabled(mcbsp))
		return 0;

	if (value)
		omap_mcbsp_st_enable(mcbsp);
	else
		omap_mcbsp_st_disable(mcbsp);

	return 1;
}

static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
				  struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);

	ucontrol->value.integer.value[0] = omap_mcbsp_st_is_enabled(mcbsp);
	return 0;
}

#define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax,		\
				      xhandler_get, xhandler_put)	\
{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,		\
	.info = omap_mcbsp_st_info_volsw,				\
	.get = xhandler_get, .put = xhandler_put,			\
	.private_value = (unsigned long)&(struct soc_mixer_control)	\
	{.min = xmin, .max = xmax} }

#define OMAP_MCBSP_ST_CONTROLS(port)					  \
static const struct snd_kcontrol_new omap_mcbsp##port##_st_controls[] = { \
SOC_SINGLE_EXT("McBSP" #port " Sidetone Switch", 1, 0, 1, 0,		  \
	       omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),		  \
OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 0 Volume", \
			      -32768, 32767,				  \
			      omap_mcbsp_get_st_ch0_volume,		  \
			      omap_mcbsp_set_st_ch0_volume),		  \
OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 1 Volume", \
			      -32768, 32767,				  \
			      omap_mcbsp_get_st_ch1_volume,		  \
			      omap_mcbsp_set_st_ch1_volume),		  \
}

OMAP_MCBSP_ST_CONTROLS(2);
OMAP_MCBSP_ST_CONTROLS(3);

int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd, int port_id)
{
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);

	if (!mcbsp->st_data) {
		dev_warn(mcbsp->dev, "No sidetone data for port\n");
		return 0;
	}

	switch (port_id) {
	case 2: /* McBSP 2 */
		return snd_soc_add_dai_controls(cpu_dai,
					omap_mcbsp2_st_controls,
					ARRAY_SIZE(omap_mcbsp2_st_controls));
	case 3: /* McBSP 3 */
		return snd_soc_add_dai_controls(cpu_dai,
					omap_mcbsp3_st_controls,
					ARRAY_SIZE(omap_mcbsp3_st_controls));
	default:
		dev_err(mcbsp->dev, "Port %d not supported\n", port_id);
		break;
	}

	return -EINVAL;
}
EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);