1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ASoC machine driver for Intel Broadwell platforms with RT5650 codec
4  *
5  * Copyright 2019, The Chromium OS Authors.  All rights reserved.
6  */
7 
8 #include <linux/delay.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <sound/core.h>
13 #include <sound/jack.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
16 #include <sound/soc.h>
17 #include <sound/soc-acpi.h>
18 
19 #include "../../codecs/rt5645.h"
20 
21 struct bdw_rt5650_priv {
22 	struct gpio_desc *gpio_hp_en;
23 	struct snd_soc_component *component;
24 };
25 
26 static const struct snd_soc_dapm_widget bdw_rt5650_widgets[] = {
27 	SND_SOC_DAPM_HP("Headphone", NULL),
28 	SND_SOC_DAPM_SPK("Speaker", NULL),
29 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
30 	SND_SOC_DAPM_MIC("DMIC Pair1", NULL),
31 	SND_SOC_DAPM_MIC("DMIC Pair2", NULL),
32 };
33 
34 static const struct snd_soc_dapm_route bdw_rt5650_map[] = {
35 	/* Speakers */
36 	{"Speaker", NULL, "SPOL"},
37 	{"Speaker", NULL, "SPOR"},
38 
39 	/* Headset jack connectors */
40 	{"Headphone", NULL, "HPOL"},
41 	{"Headphone", NULL, "HPOR"},
42 	{"IN1P", NULL, "Headset Mic"},
43 	{"IN1N", NULL, "Headset Mic"},
44 
45 	/* Digital MICs
46 	 * DMIC Pair1 are the two DMICs connected on the DMICN1 connector.
47 	 * DMIC Pair2 are the two DMICs connected on the DMICN2 connector.
48 	 * Facing the camera, DMIC Pair1 are on the left side, DMIC Pair2
49 	 * are on the right side.
50 	 */
51 	{"DMIC L1", NULL, "DMIC Pair1"},
52 	{"DMIC R1", NULL, "DMIC Pair1"},
53 	{"DMIC L2", NULL, "DMIC Pair2"},
54 	{"DMIC R2", NULL, "DMIC Pair2"},
55 
56 	/* CODEC BE connections */
57 	{"SSP0 CODEC IN", NULL, "AIF1 Capture"},
58 	{"AIF1 Playback", NULL, "SSP0 CODEC OUT"},
59 };
60 
61 static const struct snd_kcontrol_new bdw_rt5650_controls[] = {
62 	SOC_DAPM_PIN_SWITCH("Speaker"),
63 	SOC_DAPM_PIN_SWITCH("Headphone"),
64 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
65 	SOC_DAPM_PIN_SWITCH("DMIC Pair1"),
66 	SOC_DAPM_PIN_SWITCH("DMIC Pair2"),
67 };
68 
69 
70 static struct snd_soc_jack headphone_jack;
71 static struct snd_soc_jack mic_jack;
72 
73 static struct snd_soc_jack_pin headphone_jack_pin = {
74 	.pin	= "Headphone",
75 	.mask	= SND_JACK_HEADPHONE,
76 };
77 
78 static struct snd_soc_jack_pin mic_jack_pin = {
79 	.pin	= "Headset Mic",
80 	.mask	= SND_JACK_MICROPHONE,
81 };
82 
83 static int broadwell_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
84 			struct snd_pcm_hw_params *params)
85 {
86 	struct snd_interval *rate = hw_param_interval(params,
87 						      SNDRV_PCM_HW_PARAM_RATE);
88 	struct snd_interval *chan = hw_param_interval(params,
89 						      SNDRV_PCM_HW_PARAM_CHANNELS);
90 
91 	/* The ADSP will covert the FE rate to 48k, max 4-channels */
92 	rate->min = rate->max = 48000;
93 	chan->min = 2;
94 	chan->max = 4;
95 
96 	/* set SSP0 to 24 bit */
97 	snd_mask_set_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
98 			    SNDRV_PCM_FORMAT_S24_LE);
99 
100 	return 0;
101 }
102 
103 static int bdw_rt5650_hw_params(struct snd_pcm_substream *substream,
104 	struct snd_pcm_hw_params *params)
105 {
106 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
107 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
108 	int ret;
109 
110 	/* Workaround: set codec PLL to 19.2MHz that PLL source is
111 	 * from MCLK(24MHz) to conform 2.4MHz DMIC clock.
112 	 */
113 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5645_PLL1_S_MCLK,
114 		24000000, 19200000);
115 	if (ret < 0) {
116 		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
117 		return ret;
118 	}
119 
120 	/* The actual MCLK freq is 24MHz. The codec is told that MCLK is
121 	 * 24.576MHz to satisfy the requirement of rl6231_get_clk_info.
122 	 * ASRC is enabled on AD and DA filters to ensure good audio quality.
123 	 */
124 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_PLL1, 24576000,
125 		SND_SOC_CLOCK_IN);
126 	if (ret < 0) {
127 		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
128 		return ret;
129 	}
130 
131 	return ret;
132 }
133 
134 static struct snd_soc_ops bdw_rt5650_ops = {
135 	.hw_params = bdw_rt5650_hw_params,
136 };
137 
138 static const unsigned int channels[] = {
139 	2, 4,
140 };
141 
142 static const struct snd_pcm_hw_constraint_list constraints_channels = {
143 	.count = ARRAY_SIZE(channels),
144 	.list = channels,
145 	.mask = 0,
146 };
147 
148 static int bdw_rt5650_fe_startup(struct snd_pcm_substream *substream)
149 {
150 	struct snd_pcm_runtime *runtime = substream->runtime;
151 
152 	/* Board supports stereo and quad configurations for capture */
153 	if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
154 		return 0;
155 
156 	runtime->hw.channels_max = 4;
157 	return snd_pcm_hw_constraint_list(runtime, 0,
158 					  SNDRV_PCM_HW_PARAM_CHANNELS,
159 					  &constraints_channels);
160 }
161 
162 static const struct snd_soc_ops bdw_rt5650_fe_ops = {
163 	.startup = bdw_rt5650_fe_startup,
164 };
165 
166 static int bdw_rt5650_init(struct snd_soc_pcm_runtime *rtd)
167 {
168 	struct bdw_rt5650_priv *bdw_rt5650 =
169 		snd_soc_card_get_drvdata(rtd->card);
170 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
171 	struct snd_soc_component *component = codec_dai->component;
172 	int ret;
173 
174 	/* Enable codec ASRC function for Stereo DAC/Stereo1 ADC/DMIC/I2S1.
175 	 * The ASRC clock source is clk_i2s1_asrc.
176 	 */
177 	rt5645_sel_asrc_clk_src(component,
178 				RT5645_DA_STEREO_FILTER |
179 				RT5645_DA_MONO_L_FILTER |
180 				RT5645_DA_MONO_R_FILTER |
181 				RT5645_AD_STEREO_FILTER |
182 				RT5645_AD_MONO_L_FILTER |
183 				RT5645_AD_MONO_R_FILTER,
184 				RT5645_CLK_SEL_I2S1_ASRC);
185 
186 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
187 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
188 
189 	if (ret < 0) {
190 		dev_err(rtd->dev, "can't set codec TDM slot %d\n", ret);
191 		return ret;
192 	}
193 
194 	/* Create and initialize headphone jack */
195 	if (snd_soc_card_jack_new_pins(rtd->card, "Headphone Jack",
196 			SND_JACK_HEADPHONE, &headphone_jack,
197 			&headphone_jack_pin, 1)) {
198 		dev_err(component->dev, "Can't create headphone jack\n");
199 	}
200 
201 	/* Create and initialize mic jack */
202 	if (snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
203 			SND_JACK_MICROPHONE, &mic_jack, &mic_jack_pin, 1)) {
204 		dev_err(component->dev, "Can't create mic jack\n");
205 	}
206 
207 	rt5645_set_jack_detect(component, &headphone_jack, &mic_jack, NULL);
208 
209 	bdw_rt5650->component = component;
210 
211 	return 0;
212 }
213 
214 /* broadwell digital audio interface glue - connects codec <--> CPU */
215 SND_SOC_DAILINK_DEF(dummy,
216 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
217 
218 SND_SOC_DAILINK_DEF(fe,
219 	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));
220 
221 SND_SOC_DAILINK_DEF(platform,
222 	DAILINK_COMP_ARRAY(COMP_PLATFORM("haswell-pcm-audio")));
223 
224 SND_SOC_DAILINK_DEF(be,
225 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10EC5650:00", "rt5645-aif1")));
226 
227 SND_SOC_DAILINK_DEF(ssp0_port,
228 	    DAILINK_COMP_ARRAY(COMP_CPU("ssp0-port")));
229 
230 static struct snd_soc_dai_link bdw_rt5650_dais[] = {
231 	/* Front End DAI links */
232 	{
233 		.name = "System PCM",
234 		.stream_name = "System Playback",
235 		.nonatomic = 1,
236 		.dynamic = 1,
237 		.ops = &bdw_rt5650_fe_ops,
238 		.trigger = {
239 			SND_SOC_DPCM_TRIGGER_POST,
240 			SND_SOC_DPCM_TRIGGER_POST
241 		},
242 		.dpcm_playback = 1,
243 		.dpcm_capture = 1,
244 		SND_SOC_DAILINK_REG(fe, dummy, platform),
245 	},
246 
247 	/* Back End DAI links */
248 	{
249 		/* SSP0 - Codec */
250 		.name = "Codec",
251 		.id = 0,
252 		.nonatomic = 1,
253 		.no_pcm = 1,
254 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
255 			SND_SOC_DAIFMT_CBC_CFC,
256 		.ignore_pmdown_time = 1,
257 		.be_hw_params_fixup = broadwell_ssp0_fixup,
258 		.ops = &bdw_rt5650_ops,
259 		.dpcm_playback = 1,
260 		.dpcm_capture = 1,
261 		.init = bdw_rt5650_init,
262 		SND_SOC_DAILINK_REG(ssp0_port, be, platform),
263 	},
264 };
265 
266 /* use space before codec name to simplify card ID, and simplify driver name */
267 #define SOF_CARD_NAME "bdw rt5650" /* card name will be 'sof-bdw rt5650' */
268 #define SOF_DRIVER_NAME "SOF"
269 
270 #define CARD_NAME "bdw-rt5650"
271 #define DRIVER_NAME NULL /* card name will be used for driver name */
272 
273 /* ASoC machine driver for Broadwell DSP + RT5650 */
274 static struct snd_soc_card bdw_rt5650_card = {
275 	.name = CARD_NAME,
276 	.driver_name = DRIVER_NAME,
277 	.owner = THIS_MODULE,
278 	.dai_link = bdw_rt5650_dais,
279 	.num_links = ARRAY_SIZE(bdw_rt5650_dais),
280 	.dapm_widgets = bdw_rt5650_widgets,
281 	.num_dapm_widgets = ARRAY_SIZE(bdw_rt5650_widgets),
282 	.dapm_routes = bdw_rt5650_map,
283 	.num_dapm_routes = ARRAY_SIZE(bdw_rt5650_map),
284 	.controls = bdw_rt5650_controls,
285 	.num_controls = ARRAY_SIZE(bdw_rt5650_controls),
286 	.fully_routed = true,
287 };
288 
289 static int bdw_rt5650_probe(struct platform_device *pdev)
290 {
291 	struct bdw_rt5650_priv *bdw_rt5650;
292 	struct snd_soc_acpi_mach *mach;
293 	int ret;
294 
295 	bdw_rt5650_card.dev = &pdev->dev;
296 
297 	/* Allocate driver private struct */
298 	bdw_rt5650 = devm_kzalloc(&pdev->dev, sizeof(struct bdw_rt5650_priv),
299 		GFP_KERNEL);
300 	if (!bdw_rt5650)
301 		return -ENOMEM;
302 
303 	/* override platform name, if required */
304 	mach = pdev->dev.platform_data;
305 	ret = snd_soc_fixup_dai_links_platform_name(&bdw_rt5650_card,
306 						    mach->mach_params.platform);
307 
308 	if (ret)
309 		return ret;
310 
311 	/* set card and driver name */
312 	if (snd_soc_acpi_sof_parent(&pdev->dev)) {
313 		bdw_rt5650_card.name = SOF_CARD_NAME;
314 		bdw_rt5650_card.driver_name = SOF_DRIVER_NAME;
315 	} else {
316 		bdw_rt5650_card.name = CARD_NAME;
317 		bdw_rt5650_card.driver_name = DRIVER_NAME;
318 	}
319 
320 	snd_soc_card_set_drvdata(&bdw_rt5650_card, bdw_rt5650);
321 
322 	return devm_snd_soc_register_card(&pdev->dev, &bdw_rt5650_card);
323 }
324 
325 static struct platform_driver bdw_rt5650_audio = {
326 	.probe = bdw_rt5650_probe,
327 	.driver = {
328 		.name = "bdw-rt5650",
329 		.pm = &snd_soc_pm_ops,
330 	},
331 };
332 
333 module_platform_driver(bdw_rt5650_audio)
334 
335 /* Module information */
336 MODULE_AUTHOR("Ben Zhang <benzh@chromium.org>");
337 MODULE_DESCRIPTION("Intel Broadwell RT5650 machine driver");
338 MODULE_LICENSE("GPL v2");
339 MODULE_ALIAS("platform:bdw-rt5650");
340