summaryrefslogtreecommitdiff
path: root/sound/soc/intel/boards/cht_bsw_rt5672.c
blob: f8f21eee9b2d373e4d8c60e8d696286e598e0ad0 (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
/*
 *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
 *                     Cherrytrail and Braswell, with RT5672 codec.
 *
 *  Copyright (C) 2014 Intel Corp
 *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
 *          Mengdong Lin <mengdong.lin@intel.com>
 *
 *  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; version 2 of the License.
 *
 *  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/platform_device.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/soc-acpi.h>
#include "../../codecs/rt5670.h"
#include "../atom/sst-atom-controls.h"


/* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
#define CHT_PLAT_CLK_3_HZ	19200000
#define CHT_CODEC_DAI	"rt5670-aif1"

struct cht_mc_private {
	struct snd_soc_jack headset;
	char codec_name[16];
	struct clk *mclk;
};

/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
	{
		.pin = "Headset Mic",
		.mask = SND_JACK_MICROPHONE,
	},
	{
		.pin = "Headphone",
		.mask = SND_JACK_HEADPHONE,
	},
};

static int platform_clock_control(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *k, int  event)
{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct snd_soc_card *card = dapm->card;
	struct snd_soc_dai *codec_dai;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
	int ret;

	codec_dai = snd_soc_card_get_codec_dai(card, CHT_CODEC_DAI);
	if (!codec_dai) {
		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
		return -EIO;
	}

	if (SND_SOC_DAPM_EVENT_ON(event)) {
		if (ctx->mclk) {
			ret = clk_prepare_enable(ctx->mclk);
			if (ret < 0) {
				dev_err(card->dev,
					"could not configure MCLK state");
				return ret;
			}
		}

		/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
		ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
				CHT_PLAT_CLK_3_HZ, 48000 * 512);
		if (ret < 0) {
			dev_err(card->dev, "can't set codec pll: %d\n", ret);
			return ret;
		}

		/* set codec sysclk source to PLL */
		ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
			48000 * 512, SND_SOC_CLOCK_IN);
		if (ret < 0) {
			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
			return ret;
		}
	} else {
		/* Set codec sysclk source to its internal clock because codec
		 * PLL will be off when idle and MCLK will also be off by ACPI
		 * when codec is runtime suspended. Codec needs clock for jack
		 * detection and button press.
		 */
		snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
				       48000 * 512, SND_SOC_CLOCK_IN);

		if (ctx->mclk)
			clk_disable_unprepare(ctx->mclk);
	}
	return 0;
}

static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
			platform_clock_control, SND_SOC_DAPM_PRE_PMU |
			SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route cht_audio_map[] = {
	{"IN1P", NULL, "Headset Mic"},
	{"IN1N", NULL, "Headset Mic"},
	{"DMIC L1", NULL, "Int Mic"},
	{"DMIC R1", NULL, "Int Mic"},
	{"Headphone", NULL, "HPOL"},
	{"Headphone", NULL, "HPOR"},
	{"Ext Spk", NULL, "SPOLP"},
	{"Ext Spk", NULL, "SPOLN"},
	{"Ext Spk", NULL, "SPORP"},
	{"Ext Spk", NULL, "SPORN"},
	{"AIF1 Playback", NULL, "ssp2 Tx"},
	{"ssp2 Tx", NULL, "codec_out0"},
	{"ssp2 Tx", NULL, "codec_out1"},
	{"codec_in0", NULL, "ssp2 Rx"},
	{"codec_in1", NULL, "ssp2 Rx"},
	{"ssp2 Rx", NULL, "AIF1 Capture"},
	{"Headphone", NULL, "Platform Clock"},
	{"Headset Mic", NULL, "Platform Clock"},
	{"Int Mic", NULL, "Platform Clock"},
	{"Ext Spk", NULL, "Platform Clock"},
};

static const struct snd_kcontrol_new cht_mc_controls[] = {
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Int Mic"),
	SOC_DAPM_PIN_SWITCH("Ext Spk"),
};

static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
					struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	int ret;

	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
		return ret;
	}

	/* set codec sysclk source to PLL */
	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
				     params_rate(params) * 512,
				     SND_SOC_CLOCK_IN);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
		return ret;
	}
	return 0;
}

static const struct acpi_gpio_params headset_gpios = { 0, 0, false };

static const struct acpi_gpio_mapping cht_rt5672_gpios[] = {
	{ "headset-gpios", &headset_gpios, 1 },
	{},
};

static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
{
	int ret;
	struct snd_soc_dai *codec_dai = runtime->codec_dai;
	struct snd_soc_codec *codec = codec_dai->codec;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);

	if (devm_acpi_dev_add_driver_gpios(codec->dev, cht_rt5672_gpios))
		dev_warn(runtime->dev, "Unable to add GPIO mapping table\n");

	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
	if (ret < 0) {
		dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
		return ret;
	}

	/* Select codec ASRC clock source to track I2S1 clock, because codec
	 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
	 * be supported by RT5672. Otherwise, ASRC will be disabled and cause
	 * noise.
	 */
	rt5670_sel_asrc_clk_src(codec,
				RT5670_DA_STEREO_FILTER
				| RT5670_DA_MONO_L_FILTER
				| RT5670_DA_MONO_R_FILTER
				| RT5670_AD_STEREO_FILTER
				| RT5670_AD_MONO_L_FILTER
				| RT5670_AD_MONO_R_FILTER,
				RT5670_CLK_SEL_I2S1_ASRC);

        ret = snd_soc_card_jack_new(runtime->card, "Headset",
				    SND_JACK_HEADSET | SND_JACK_BTN_0 |
				    SND_JACK_BTN_1 | SND_JACK_BTN_2,
				    &ctx->headset,
				    cht_bsw_headset_pins,
				    ARRAY_SIZE(cht_bsw_headset_pins));
        if (ret)
                return ret;

	rt5670_set_jack_detect(codec, &ctx->headset);
	if (ctx->mclk) {
		/*
		 * The firmware might enable the clock at
		 * boot (this information may or may not
		 * be reflected in the enable clock register).
		 * To change the rate we must disable the clock
		 * first to cover these cases. Due to common
		 * clock framework restrictions that do not allow
		 * to disable a clock that has not been enabled,
		 * we need to enable the clock first.
		 */
		ret = clk_prepare_enable(ctx->mclk);
		if (!ret)
			clk_disable_unprepare(ctx->mclk);

		ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);

		if (ret) {
			dev_err(runtime->dev, "unable to set MCLK rate\n");
			return ret;
		}
	}
	return 0;
}

static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
			    struct snd_pcm_hw_params *params)
{
	struct snd_interval *rate = hw_param_interval(params,
			SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval *channels = hw_param_interval(params,
						SNDRV_PCM_HW_PARAM_CHANNELS);

	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
	rate->min = rate->max = 48000;
	channels->min = channels->max = 2;

	/* set SSP2 to 24-bit */
	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
	return 0;
}

static int cht_aif1_startup(struct snd_pcm_substream *substream)
{
	return snd_pcm_hw_constraint_single(substream->runtime,
			SNDRV_PCM_HW_PARAM_RATE, 48000);
}

static const struct snd_soc_ops cht_aif1_ops = {
	.startup = cht_aif1_startup,
};

static const struct snd_soc_ops cht_be_ssp2_ops = {
	.hw_params = cht_aif1_hw_params,
};

static struct snd_soc_dai_link cht_dailink[] = {
	/* Front End DAI links */
	[MERR_DPCM_AUDIO] = {
		.name = "Audio Port",
		.stream_name = "Audio",
		.cpu_dai_name = "media-cpu-dai",
		.codec_dai_name = "snd-soc-dummy-dai",
		.codec_name = "snd-soc-dummy",
		.platform_name = "sst-mfld-platform",
		.nonatomic = true,
		.dynamic = 1,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.ops = &cht_aif1_ops,
	},
	[MERR_DPCM_DEEP_BUFFER] = {
		.name = "Deep-Buffer Audio Port",
		.stream_name = "Deep-Buffer Audio",
		.cpu_dai_name = "deepbuffer-cpu-dai",
		.codec_dai_name = "snd-soc-dummy-dai",
		.codec_name = "snd-soc-dummy",
		.platform_name = "sst-mfld-platform",
		.nonatomic = true,
		.dynamic = 1,
		.dpcm_playback = 1,
		.ops = &cht_aif1_ops,
	},

	/* Back End DAI links */
	{
		/* SSP2 - Codec */
		.name = "SSP2-Codec",
		.id = 0,
		.cpu_dai_name = "ssp2-port",
		.platform_name = "sst-mfld-platform",
		.no_pcm = 1,
		.nonatomic = true,
		.codec_dai_name = "rt5670-aif1",
		.codec_name = "i2c-10EC5670:00",
		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
					| SND_SOC_DAIFMT_CBS_CFS,
		.init = cht_codec_init,
		.be_hw_params_fixup = cht_codec_fixup,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.ops = &cht_be_ssp2_ops,
	},
};

static int cht_suspend_pre(struct snd_soc_card *card)
{
	struct snd_soc_component *component;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);

	list_for_each_entry(component, &card->component_dev_list, card_list) {
		if (!strncmp(component->name,
			     ctx->codec_name, sizeof(ctx->codec_name))) {
			struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

			dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n");
			rt5670_jack_suspend(codec);
			break;
		}
	}
	return 0;
}

static int cht_resume_post(struct snd_soc_card *card)
{
	struct snd_soc_component *component;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);

	list_for_each_entry(component, &card->component_dev_list, card_list) {
		if (!strncmp(component->name,
			     ctx->codec_name, sizeof(ctx->codec_name))) {
			struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

			dev_dbg(codec->dev, "enabling jack detect for resume.\n");
			rt5670_jack_resume(codec);
			break;
		}
	}

	return 0;
}

/* SoC card */
static struct snd_soc_card snd_soc_card_cht = {
	.name = "cht-bsw-rt5672",
	.owner = THIS_MODULE,
	.dai_link = cht_dailink,
	.num_links = ARRAY_SIZE(cht_dailink),
	.dapm_widgets = cht_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
	.dapm_routes = cht_audio_map,
	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
	.controls = cht_mc_controls,
	.num_controls = ARRAY_SIZE(cht_mc_controls),
	.suspend_pre = cht_suspend_pre,
	.resume_post = cht_resume_post,
};

#define RT5672_I2C_DEFAULT	"i2c-10EC5670:00"

static int snd_cht_mc_probe(struct platform_device *pdev)
{
	int ret_val = 0;
	struct cht_mc_private *drv;
	struct snd_soc_acpi_mach *mach = pdev->dev.platform_data;
	const char *i2c_name;
	int i;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_ATOMIC);
	if (!drv)
		return -ENOMEM;

	strcpy(drv->codec_name, RT5672_I2C_DEFAULT);

	/* fixup codec name based on HID */
	if (mach) {
		i2c_name = snd_soc_acpi_find_name_from_hid(mach->id);
		if (i2c_name) {
			snprintf(drv->codec_name, sizeof(drv->codec_name),
				 "i2c-%s", i2c_name);
			for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
				if (!strcmp(cht_dailink[i].codec_name,
					    RT5672_I2C_DEFAULT)) {
					cht_dailink[i].codec_name =
						drv->codec_name;
					break;
				}
			}
		}
	}

	drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
	if (IS_ERR(drv->mclk)) {
		dev_err(&pdev->dev,
			"Failed to get MCLK from pmc_plt_clk_3: %ld\n",
			PTR_ERR(drv->mclk));
		return PTR_ERR(drv->mclk);
	}
	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);

	/* register the soc card */
	snd_soc_card_cht.dev = &pdev->dev;
	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
	if (ret_val) {
		dev_err(&pdev->dev,
			"snd_soc_register_card failed %d\n", ret_val);
		return ret_val;
	}
	platform_set_drvdata(pdev, &snd_soc_card_cht);
	return ret_val;
}

static struct platform_driver snd_cht_mc_driver = {
	.driver = {
		.name = "cht-bsw-rt5672",
	},
	.probe = snd_cht_mc_probe,
};

module_platform_driver(snd_cht_mc_driver);

MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:cht-bsw-rt5672");