1 /*
2  *  cht-bsw-rt5645.c - ASoc Machine driver for Intel Cherryview-based platforms
3  *                     Cherrytrail and Braswell, with RT5645 codec.
4  *
5  *  Copyright (C) 2015 Intel Corp
6  *  Author: Fang, Yang A <yang.a.fang@intel.com>
7  *	        N,Harshapriya <harshapriya.n@intel.com>
8  *  This file is modified from cht_bsw_rt5672.c
9  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10  *
11  *  This program is free software; you can redistribute it and/or modify
12  *  it under the terms of the GNU General Public License as published by
13  *  the Free Software Foundation; version 2 of the License.
14  *
15  *  This program is distributed in the hope that it will be useful, but
16  *  WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  *  General Public License for more details.
19  *
20  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21  */
22 
23 #include <linux/module.h>
24 #include <linux/acpi.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <sound/pcm.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/jack.h>
31 #include "../../codecs/rt5645.h"
32 #include "../atom/sst-atom-controls.h"
33 #include "../common/sst-acpi.h"
34 
35 #define CHT_PLAT_CLK_3_HZ	19200000
36 #define CHT_CODEC_DAI	"rt5645-aif1"
37 
38 struct cht_acpi_card {
39 	char *codec_id;
40 	int codec_type;
41 	struct snd_soc_card *soc_card;
42 };
43 
44 struct cht_mc_private {
45 	struct snd_soc_jack jack;
46 	struct cht_acpi_card *acpi_card;
47 };
48 
49 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
50 {
51 	struct snd_soc_pcm_runtime *rtd;
52 
53 	list_for_each_entry(rtd, &card->rtd_list, list) {
54 		if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
55 			     strlen(CHT_CODEC_DAI)))
56 			return rtd->codec_dai;
57 	}
58 	return NULL;
59 }
60 
61 static int platform_clock_control(struct snd_soc_dapm_widget *w,
62 		struct snd_kcontrol *k, int  event)
63 {
64 	struct snd_soc_dapm_context *dapm = w->dapm;
65 	struct snd_soc_card *card = dapm->card;
66 	struct snd_soc_dai *codec_dai;
67 	int ret;
68 
69 	codec_dai = cht_get_codec_dai(card);
70 	if (!codec_dai) {
71 		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
72 		return -EIO;
73 	}
74 
75 	if (!SND_SOC_DAPM_EVENT_OFF(event))
76 		return 0;
77 
78 	/* Set codec sysclk source to its internal clock because codec PLL will
79 	 * be off when idle and MCLK will also be off by ACPI when codec is
80 	 * runtime suspended. Codec needs clock for jack detection and button
81 	 * press.
82 	 */
83 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_RCCLK,
84 			0, SND_SOC_CLOCK_IN);
85 	if (ret < 0) {
86 		dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
87 		return ret;
88 	}
89 
90 	return 0;
91 }
92 
93 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
94 	SND_SOC_DAPM_HP("Headphone", NULL),
95 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
96 	SND_SOC_DAPM_MIC("Int Mic", NULL),
97 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
98 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
99 			platform_clock_control, SND_SOC_DAPM_POST_PMD),
100 };
101 
102 static const struct snd_soc_dapm_route cht_rt5645_audio_map[] = {
103 	{"IN1P", NULL, "Headset Mic"},
104 	{"IN1N", NULL, "Headset Mic"},
105 	{"DMIC L1", NULL, "Int Mic"},
106 	{"DMIC R1", NULL, "Int Mic"},
107 	{"Headphone", NULL, "HPOL"},
108 	{"Headphone", NULL, "HPOR"},
109 	{"Ext Spk", NULL, "SPOL"},
110 	{"Ext Spk", NULL, "SPOR"},
111 	{"AIF1 Playback", NULL, "ssp2 Tx"},
112 	{"ssp2 Tx", NULL, "codec_out0"},
113 	{"ssp2 Tx", NULL, "codec_out1"},
114 	{"codec_in0", NULL, "ssp2 Rx" },
115 	{"codec_in1", NULL, "ssp2 Rx" },
116 	{"ssp2 Rx", NULL, "AIF1 Capture"},
117 	{"Headphone", NULL, "Platform Clock"},
118 	{"Headset Mic", NULL, "Platform Clock"},
119 	{"Int Mic", NULL, "Platform Clock"},
120 	{"Ext Spk", NULL, "Platform Clock"},
121 };
122 
123 static const struct snd_soc_dapm_route cht_rt5650_audio_map[] = {
124 	{"IN1P", NULL, "Headset Mic"},
125 	{"IN1N", NULL, "Headset Mic"},
126 	{"DMIC L2", NULL, "Int Mic"},
127 	{"DMIC R2", NULL, "Int Mic"},
128 	{"Headphone", NULL, "HPOL"},
129 	{"Headphone", NULL, "HPOR"},
130 	{"Ext Spk", NULL, "SPOL"},
131 	{"Ext Spk", NULL, "SPOR"},
132 	{"AIF1 Playback", NULL, "ssp2 Tx"},
133 	{"ssp2 Tx", NULL, "codec_out0"},
134 	{"ssp2 Tx", NULL, "codec_out1"},
135 	{"codec_in0", NULL, "ssp2 Rx" },
136 	{"codec_in1", NULL, "ssp2 Rx" },
137 	{"ssp2 Rx", NULL, "AIF1 Capture"},
138 	{"Headphone", NULL, "Platform Clock"},
139 	{"Headset Mic", NULL, "Platform Clock"},
140 	{"Int Mic", NULL, "Platform Clock"},
141 	{"Ext Spk", NULL, "Platform Clock"},
142 };
143 
144 static const struct snd_kcontrol_new cht_mc_controls[] = {
145 	SOC_DAPM_PIN_SWITCH("Headphone"),
146 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
147 	SOC_DAPM_PIN_SWITCH("Int Mic"),
148 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
149 };
150 
151 static struct snd_soc_jack_pin cht_bsw_jack_pins[] = {
152 	{
153 		.pin	= "Headphone",
154 		.mask	= SND_JACK_HEADPHONE,
155 	},
156 	{
157 		.pin	= "Headset Mic",
158 		.mask	= SND_JACK_MICROPHONE,
159 	},
160 };
161 
162 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
163 			     struct snd_pcm_hw_params *params)
164 {
165 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
166 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
167 	int ret;
168 
169 	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
170 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5645_PLL1_S_MCLK,
171 				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
172 	if (ret < 0) {
173 		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
174 		return ret;
175 	}
176 
177 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_PLL1,
178 				params_rate(params) * 512, SND_SOC_CLOCK_IN);
179 	if (ret < 0) {
180 		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
181 		return ret;
182 	}
183 
184 	return 0;
185 }
186 
187 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
188 {
189 	int ret;
190 	int jack_type;
191 	struct snd_soc_codec *codec = runtime->codec;
192 	struct snd_soc_dai *codec_dai = runtime->codec_dai;
193 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
194 
195 	/* Select clk_i2s1_asrc as ASRC clock source */
196 	rt5645_sel_asrc_clk_src(codec,
197 				RT5645_DA_STEREO_FILTER |
198 				RT5645_DA_MONO_L_FILTER |
199 				RT5645_DA_MONO_R_FILTER |
200 				RT5645_AD_STEREO_FILTER,
201 				RT5645_CLK_SEL_I2S1_ASRC);
202 
203 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
204 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
205 	if (ret < 0) {
206 		dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
207 		return ret;
208 	}
209 
210 	if (ctx->acpi_card->codec_type == CODEC_TYPE_RT5650)
211 		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE |
212 					SND_JACK_BTN_0 | SND_JACK_BTN_1 |
213 					SND_JACK_BTN_2 | SND_JACK_BTN_3;
214 	else
215 		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE;
216 
217 	ret = snd_soc_card_jack_new(runtime->card, "Headset",
218 				    jack_type, &ctx->jack,
219 				    cht_bsw_jack_pins, ARRAY_SIZE(cht_bsw_jack_pins));
220 	if (ret) {
221 		dev_err(runtime->dev, "Headset jack creation failed %d\n", ret);
222 		return ret;
223 	}
224 
225 	rt5645_set_jack_detect(codec, &ctx->jack, &ctx->jack, &ctx->jack);
226 
227 	return ret;
228 }
229 
230 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
231 			    struct snd_pcm_hw_params *params)
232 {
233 	struct snd_interval *rate = hw_param_interval(params,
234 			SNDRV_PCM_HW_PARAM_RATE);
235 	struct snd_interval *channels = hw_param_interval(params,
236 						SNDRV_PCM_HW_PARAM_CHANNELS);
237 
238 	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
239 	rate->min = rate->max = 48000;
240 	channels->min = channels->max = 2;
241 
242 	/* set SSP2 to 24-bit */
243 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
244 	return 0;
245 }
246 
247 static int cht_aif1_startup(struct snd_pcm_substream *substream)
248 {
249 	return snd_pcm_hw_constraint_single(substream->runtime,
250 			SNDRV_PCM_HW_PARAM_RATE, 48000);
251 }
252 
253 static struct snd_soc_ops cht_aif1_ops = {
254 	.startup = cht_aif1_startup,
255 };
256 
257 static struct snd_soc_ops cht_be_ssp2_ops = {
258 	.hw_params = cht_aif1_hw_params,
259 };
260 
261 static struct snd_soc_dai_link cht_dailink[] = {
262 	[MERR_DPCM_AUDIO] = {
263 		.name = "Audio Port",
264 		.stream_name = "Audio",
265 		.cpu_dai_name = "media-cpu-dai",
266 		.codec_dai_name = "snd-soc-dummy-dai",
267 		.codec_name = "snd-soc-dummy",
268 		.platform_name = "sst-mfld-platform",
269 		.nonatomic = true,
270 		.dynamic = 1,
271 		.dpcm_playback = 1,
272 		.dpcm_capture = 1,
273 		.ops = &cht_aif1_ops,
274 	},
275 	[MERR_DPCM_DEEP_BUFFER] = {
276 		.name = "Deep-Buffer Audio Port",
277 		.stream_name = "Deep-Buffer Audio",
278 		.cpu_dai_name = "deepbuffer-cpu-dai",
279 		.codec_dai_name = "snd-soc-dummy-dai",
280 		.codec_name = "snd-soc-dummy",
281 		.platform_name = "sst-mfld-platform",
282 		.nonatomic = true,
283 		.dynamic = 1,
284 		.dpcm_playback = 1,
285 		.ops = &cht_aif1_ops,
286 	},
287 	[MERR_DPCM_COMPR] = {
288 		.name = "Compressed Port",
289 		.stream_name = "Compress",
290 		.cpu_dai_name = "compress-cpu-dai",
291 		.codec_dai_name = "snd-soc-dummy-dai",
292 		.codec_name = "snd-soc-dummy",
293 		.platform_name = "sst-mfld-platform",
294 	},
295 	/* CODEC<->CODEC link */
296 	/* back ends */
297 	{
298 		.name = "SSP2-Codec",
299 		.id = 1,
300 		.cpu_dai_name = "ssp2-port",
301 		.platform_name = "sst-mfld-platform",
302 		.no_pcm = 1,
303 		.codec_dai_name = "rt5645-aif1",
304 		.codec_name = "i2c-10EC5645:00",
305 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
306 					| SND_SOC_DAIFMT_CBS_CFS,
307 		.init = cht_codec_init,
308 		.be_hw_params_fixup = cht_codec_fixup,
309 		.nonatomic = true,
310 		.dpcm_playback = 1,
311 		.dpcm_capture = 1,
312 		.ops = &cht_be_ssp2_ops,
313 	},
314 };
315 
316 /* SoC card */
317 static struct snd_soc_card snd_soc_card_chtrt5645 = {
318 	.name = "chtrt5645",
319 	.owner = THIS_MODULE,
320 	.dai_link = cht_dailink,
321 	.num_links = ARRAY_SIZE(cht_dailink),
322 	.dapm_widgets = cht_dapm_widgets,
323 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
324 	.dapm_routes = cht_rt5645_audio_map,
325 	.num_dapm_routes = ARRAY_SIZE(cht_rt5645_audio_map),
326 	.controls = cht_mc_controls,
327 	.num_controls = ARRAY_SIZE(cht_mc_controls),
328 };
329 
330 static struct snd_soc_card snd_soc_card_chtrt5650 = {
331 	.name = "chtrt5650",
332 	.owner = THIS_MODULE,
333 	.dai_link = cht_dailink,
334 	.num_links = ARRAY_SIZE(cht_dailink),
335 	.dapm_widgets = cht_dapm_widgets,
336 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
337 	.dapm_routes = cht_rt5650_audio_map,
338 	.num_dapm_routes = ARRAY_SIZE(cht_rt5650_audio_map),
339 	.controls = cht_mc_controls,
340 	.num_controls = ARRAY_SIZE(cht_mc_controls),
341 };
342 
343 static struct cht_acpi_card snd_soc_cards[] = {
344 	{"10EC5640", CODEC_TYPE_RT5645, &snd_soc_card_chtrt5645},
345 	{"10EC5645", CODEC_TYPE_RT5645, &snd_soc_card_chtrt5645},
346 	{"10EC5650", CODEC_TYPE_RT5650, &snd_soc_card_chtrt5650},
347 };
348 
349 static char cht_rt5640_codec_name[16]; /* i2c-<HID>:00 with HID being 8 chars */
350 
351 static int snd_cht_mc_probe(struct platform_device *pdev)
352 {
353 	int ret_val = 0;
354 	int i;
355 	struct cht_mc_private *drv;
356 	struct snd_soc_card *card = snd_soc_cards[0].soc_card;
357 	char codec_name[16];
358 	struct sst_acpi_mach *mach;
359 	const char *i2c_name = NULL;
360 	int dai_index = 0;
361 
362 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_ATOMIC);
363 	if (!drv)
364 		return -ENOMEM;
365 
366 	for (i = 0; i < ARRAY_SIZE(snd_soc_cards); i++) {
367 		if (acpi_dev_found(snd_soc_cards[i].codec_id)) {
368 			dev_dbg(&pdev->dev,
369 				"found codec %s\n", snd_soc_cards[i].codec_id);
370 			card = snd_soc_cards[i].soc_card;
371 			drv->acpi_card = &snd_soc_cards[i];
372 			break;
373 		}
374 	}
375 	card->dev = &pdev->dev;
376 	mach = card->dev->platform_data;
377 	sprintf(codec_name, "i2c-%s:00", drv->acpi_card->codec_id);
378 
379 	/* set correct codec name */
380 	for (i = 0; i < ARRAY_SIZE(cht_dailink); i++)
381 		if (!strcmp(card->dai_link[i].codec_name, "i2c-10EC5645:00")) {
382 			card->dai_link[i].codec_name = kstrdup(codec_name, GFP_KERNEL);
383 			dai_index = i;
384 		}
385 
386 	/* fixup codec name based on HID */
387 	i2c_name = sst_acpi_find_name_from_hid(mach->id);
388 	if (i2c_name != NULL) {
389 		snprintf(cht_rt5640_codec_name, sizeof(cht_rt5640_codec_name),
390 			"%s%s", "i2c-", i2c_name);
391 		cht_dailink[dai_index].codec_name = cht_rt5640_codec_name;
392 	}
393 
394 	snd_soc_card_set_drvdata(card, drv);
395 	ret_val = devm_snd_soc_register_card(&pdev->dev, card);
396 	if (ret_val) {
397 		dev_err(&pdev->dev,
398 			"snd_soc_register_card failed %d\n", ret_val);
399 		return ret_val;
400 	}
401 	platform_set_drvdata(pdev, card);
402 	return ret_val;
403 }
404 
405 static struct platform_driver snd_cht_mc_driver = {
406 	.driver = {
407 		.name = "cht-bsw-rt5645",
408 	},
409 	.probe = snd_cht_mc_probe,
410 };
411 
412 module_platform_driver(snd_cht_mc_driver)
413 
414 MODULE_DESCRIPTION("ASoC Intel(R) Braswell Machine driver");
415 MODULE_AUTHOR("Fang, Yang A,N,Harshapriya");
416 MODULE_LICENSE("GPL v2");
417 MODULE_ALIAS("platform:cht-bsw-rt5645");
418