1 /*
2  *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
3  *                     Cherrytrail and Braswell, with RT5672 codec.
4  *
5  *  Copyright (C) 2014 Intel Corp
6  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
7  *          Mengdong Lin <mengdong.lin@intel.com>
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; version 2 of the License.
12  *
13  *  This program is distributed in the hope that it will be useful, but
14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  *  General Public License for more details.
17  */
18 
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/jack.h>
26 #include "../../codecs/rt5670.h"
27 #include "../atom/sst-atom-controls.h"
28 
29 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
30 #define CHT_PLAT_CLK_3_HZ	19200000
31 #define CHT_CODEC_DAI	"rt5670-aif1"
32 
33 static struct snd_soc_jack cht_bsw_headset;
34 
35 /* Headset jack detection DAPM pins */
36 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
37 	{
38 		.pin = "Headset Mic",
39 		.mask = SND_JACK_MICROPHONE,
40 	},
41 	{
42 		.pin = "Headphone",
43 		.mask = SND_JACK_HEADPHONE,
44 	},
45 };
46 
47 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
48 {
49 	int i;
50 
51 	for (i = 0; i < card->num_rtd; i++) {
52 		struct snd_soc_pcm_runtime *rtd;
53 
54 		rtd = card->rtd + i;
55 		if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
56 			     strlen(CHT_CODEC_DAI)))
57 			return rtd->codec_dai;
58 	}
59 	return NULL;
60 }
61 
62 static int platform_clock_control(struct snd_soc_dapm_widget *w,
63 		struct snd_kcontrol *k, int  event)
64 {
65 	struct snd_soc_dapm_context *dapm = w->dapm;
66 	struct snd_soc_card *card = dapm->card;
67 	struct snd_soc_dai *codec_dai;
68 	int ret;
69 
70 	codec_dai = cht_get_codec_dai(card);
71 	if (!codec_dai) {
72 		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
73 		return -EIO;
74 	}
75 
76 	if (SND_SOC_DAPM_EVENT_ON(event)) {
77 		/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
78 		ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
79 				CHT_PLAT_CLK_3_HZ, 48000 * 512);
80 		if (ret < 0) {
81 			dev_err(card->dev, "can't set codec pll: %d\n", ret);
82 			return ret;
83 		}
84 
85 		/* set codec sysclk source to PLL */
86 		ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
87 			48000 * 512, SND_SOC_CLOCK_IN);
88 		if (ret < 0) {
89 			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
90 			return ret;
91 		}
92 	} else {
93 		/* Set codec sysclk source to its internal clock because codec
94 		 * PLL will be off when idle and MCLK will also be off by ACPI
95 		 * when codec is runtime suspended. Codec needs clock for jack
96 		 * detection and button press.
97 		 */
98 		snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
99 				       48000 * 512, SND_SOC_CLOCK_IN);
100 	}
101 	return 0;
102 }
103 
104 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
105 	SND_SOC_DAPM_HP("Headphone", NULL),
106 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
107 	SND_SOC_DAPM_MIC("Int Mic", NULL),
108 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
109 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
110 			platform_clock_control, SND_SOC_DAPM_PRE_PMU |
111 			SND_SOC_DAPM_POST_PMD),
112 };
113 
114 static const struct snd_soc_dapm_route cht_audio_map[] = {
115 	{"IN1P", NULL, "Headset Mic"},
116 	{"IN1N", NULL, "Headset Mic"},
117 	{"DMIC L1", NULL, "Int Mic"},
118 	{"DMIC R1", NULL, "Int Mic"},
119 	{"Headphone", NULL, "HPOL"},
120 	{"Headphone", NULL, "HPOR"},
121 	{"Ext Spk", NULL, "SPOLP"},
122 	{"Ext Spk", NULL, "SPOLN"},
123 	{"Ext Spk", NULL, "SPORP"},
124 	{"Ext Spk", NULL, "SPORN"},
125 	{"AIF1 Playback", NULL, "ssp2 Tx"},
126 	{"ssp2 Tx", NULL, "codec_out0"},
127 	{"ssp2 Tx", NULL, "codec_out1"},
128 	{"codec_in0", NULL, "ssp2 Rx"},
129 	{"codec_in1", NULL, "ssp2 Rx"},
130 	{"ssp2 Rx", NULL, "AIF1 Capture"},
131 	{"Headphone", NULL, "Platform Clock"},
132 	{"Headset Mic", NULL, "Platform Clock"},
133 	{"Int Mic", NULL, "Platform Clock"},
134 	{"Ext Spk", NULL, "Platform Clock"},
135 };
136 
137 static const struct snd_kcontrol_new cht_mc_controls[] = {
138 	SOC_DAPM_PIN_SWITCH("Headphone"),
139 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
140 	SOC_DAPM_PIN_SWITCH("Int Mic"),
141 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
142 };
143 
144 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
145 					struct snd_pcm_hw_params *params)
146 {
147 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
148 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
149 	int ret;
150 
151 	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
152 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
153 				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
154 	if (ret < 0) {
155 		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
156 		return ret;
157 	}
158 
159 	/* set codec sysclk source to PLL */
160 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
161 				     params_rate(params) * 512,
162 				     SND_SOC_CLOCK_IN);
163 	if (ret < 0) {
164 		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
165 		return ret;
166 	}
167 	return 0;
168 }
169 
170 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
171 {
172 	int ret;
173 	struct snd_soc_dai *codec_dai = runtime->codec_dai;
174 	struct snd_soc_codec *codec = codec_dai->codec;
175 
176 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
177 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
178 	if (ret < 0) {
179 		dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
180 		return ret;
181 	}
182 
183 	/* Select codec ASRC clock source to track I2S1 clock, because codec
184 	 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
185 	 * be supported by RT5672. Otherwise, ASRC will be disabled and cause
186 	 * noise.
187 	 */
188 	rt5670_sel_asrc_clk_src(codec,
189 				RT5670_DA_STEREO_FILTER
190 				| RT5670_DA_MONO_L_FILTER
191 				| RT5670_DA_MONO_R_FILTER
192 				| RT5670_AD_STEREO_FILTER
193 				| RT5670_AD_MONO_L_FILTER
194 				| RT5670_AD_MONO_R_FILTER,
195 				RT5670_CLK_SEL_I2S1_ASRC);
196 
197         ret = snd_soc_card_jack_new(runtime->card, "Headset",
198                 SND_JACK_HEADSET | SND_JACK_BTN_0 |
199                 SND_JACK_BTN_1 | SND_JACK_BTN_2, &cht_bsw_headset,
200                 cht_bsw_headset_pins, ARRAY_SIZE(cht_bsw_headset_pins));
201         if (ret)
202                 return ret;
203 
204 	rt5670_set_jack_detect(codec, &cht_bsw_headset);
205 	return 0;
206 }
207 
208 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
209 			    struct snd_pcm_hw_params *params)
210 {
211 	struct snd_interval *rate = hw_param_interval(params,
212 			SNDRV_PCM_HW_PARAM_RATE);
213 	struct snd_interval *channels = hw_param_interval(params,
214 						SNDRV_PCM_HW_PARAM_CHANNELS);
215 
216 	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
217 	rate->min = rate->max = 48000;
218 	channels->min = channels->max = 2;
219 
220 	/* set SSP2 to 24-bit */
221 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
222 	return 0;
223 }
224 
225 static int cht_aif1_startup(struct snd_pcm_substream *substream)
226 {
227 	return snd_pcm_hw_constraint_single(substream->runtime,
228 			SNDRV_PCM_HW_PARAM_RATE, 48000);
229 }
230 
231 static struct snd_soc_ops cht_aif1_ops = {
232 	.startup = cht_aif1_startup,
233 };
234 
235 static struct snd_soc_ops cht_be_ssp2_ops = {
236 	.hw_params = cht_aif1_hw_params,
237 };
238 
239 static struct snd_soc_dai_link cht_dailink[] = {
240 	/* Front End DAI links */
241 	[MERR_DPCM_AUDIO] = {
242 		.name = "Audio Port",
243 		.stream_name = "Audio",
244 		.cpu_dai_name = "media-cpu-dai",
245 		.codec_dai_name = "snd-soc-dummy-dai",
246 		.codec_name = "snd-soc-dummy",
247 		.platform_name = "sst-mfld-platform",
248 		.nonatomic = true,
249 		.dynamic = 1,
250 		.dpcm_playback = 1,
251 		.dpcm_capture = 1,
252 		.ops = &cht_aif1_ops,
253 	},
254 	[MERR_DPCM_COMPR] = {
255 		.name = "Compressed Port",
256 		.stream_name = "Compress",
257 		.cpu_dai_name = "compress-cpu-dai",
258 		.codec_dai_name = "snd-soc-dummy-dai",
259 		.codec_name = "snd-soc-dummy",
260 		.platform_name = "sst-mfld-platform",
261 	},
262 
263 	/* Back End DAI links */
264 	{
265 		/* SSP2 - Codec */
266 		.name = "SSP2-Codec",
267 		.be_id = 1,
268 		.cpu_dai_name = "ssp2-port",
269 		.platform_name = "sst-mfld-platform",
270 		.no_pcm = 1,
271 		.nonatomic = true,
272 		.codec_dai_name = "rt5670-aif1",
273 		.codec_name = "i2c-10EC5670:00",
274 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
275 					| SND_SOC_DAIFMT_CBS_CFS,
276 		.init = cht_codec_init,
277 		.be_hw_params_fixup = cht_codec_fixup,
278 		.dpcm_playback = 1,
279 		.dpcm_capture = 1,
280 		.ops = &cht_be_ssp2_ops,
281 	},
282 };
283 
284 static int cht_suspend_pre(struct snd_soc_card *card)
285 {
286 	struct snd_soc_codec *codec;
287 
288 	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
289 		if (!strcmp(codec->component.name, "i2c-10EC5670:00")) {
290 			dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n");
291 			rt5670_jack_suspend(codec);
292 			break;
293 		}
294 	}
295 	return 0;
296 }
297 
298 static int cht_resume_post(struct snd_soc_card *card)
299 {
300 	struct snd_soc_codec *codec;
301 
302 	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
303 		if (!strcmp(codec->component.name, "i2c-10EC5670:00")) {
304 			dev_dbg(codec->dev, "enabling jack detect for resume.\n");
305 			rt5670_jack_resume(codec);
306 			break;
307 		}
308 	}
309 
310 	return 0;
311 }
312 
313 /* SoC card */
314 static struct snd_soc_card snd_soc_card_cht = {
315 	.name = "cherrytrailcraudio",
316 	.owner = THIS_MODULE,
317 	.dai_link = cht_dailink,
318 	.num_links = ARRAY_SIZE(cht_dailink),
319 	.dapm_widgets = cht_dapm_widgets,
320 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
321 	.dapm_routes = cht_audio_map,
322 	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
323 	.controls = cht_mc_controls,
324 	.num_controls = ARRAY_SIZE(cht_mc_controls),
325 	.suspend_pre = cht_suspend_pre,
326 	.resume_post = cht_resume_post,
327 };
328 
329 static int snd_cht_mc_probe(struct platform_device *pdev)
330 {
331 	int ret_val = 0;
332 
333 	/* register the soc card */
334 	snd_soc_card_cht.dev = &pdev->dev;
335 	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
336 	if (ret_val) {
337 		dev_err(&pdev->dev,
338 			"snd_soc_register_card failed %d\n", ret_val);
339 		return ret_val;
340 	}
341 	platform_set_drvdata(pdev, &snd_soc_card_cht);
342 	return ret_val;
343 }
344 
345 static struct platform_driver snd_cht_mc_driver = {
346 	.driver = {
347 		.name = "cht-bsw-rt5672",
348 	},
349 	.probe = snd_cht_mc_probe,
350 };
351 
352 module_platform_driver(snd_cht_mc_driver);
353 
354 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
355 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
356 MODULE_LICENSE("GPL v2");
357 MODULE_ALIAS("platform:cht-bsw-rt5672");
358