xref: /linux/sound/soc/qcom/apq8016_sbc.c (revision 33e02dc69afbd8f1b85a51d74d72f139ba4ca623)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015 The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/device.h>
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/io.h>
10 #include <linux/of.h>
11 #include <linux/clk.h>
12 #include <linux/platform_device.h>
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <sound/jack.h>
16 #include <sound/soc.h>
17 #include <uapi/linux/input-event-codes.h>
18 #include <dt-bindings/sound/apq8016-lpass.h>
19 #include <dt-bindings/sound/qcom,q6afe.h>
20 #include "common.h"
21 #include "qdsp6/q6afe.h"
22 
23 #define MI2S_COUNT  (MI2S_QUATERNARY + 1)
24 
25 struct apq8016_sbc_data {
26 	struct snd_soc_card card;
27 	void __iomem *mic_iomux;
28 	void __iomem *spkr_iomux;
29 	struct snd_soc_jack jack;
30 	bool jack_setup;
31 	int mi2s_clk_count[MI2S_COUNT];
32 };
33 
34 #define MIC_CTRL_TER_WS_SLAVE_SEL	BIT(21)
35 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10	BIT(17)
36 #define MIC_CTRL_TLMM_SCLK_EN		BIT(1)
37 #define	SPKR_CTL_PRI_WS_SLAVE_SEL_11	(BIT(17) | BIT(16))
38 #define SPKR_CTL_TLMM_MCLK_EN		BIT(1)
39 #define SPKR_CTL_TLMM_SCLK_EN		BIT(2)
40 #define SPKR_CTL_TLMM_DATA1_EN		BIT(3)
41 #define SPKR_CTL_TLMM_WS_OUT_SEL_MASK	GENMASK(7, 6)
42 #define SPKR_CTL_TLMM_WS_OUT_SEL_SEC	BIT(6)
43 #define SPKR_CTL_TLMM_WS_EN_SEL_MASK	GENMASK(19, 18)
44 #define SPKR_CTL_TLMM_WS_EN_SEL_SEC	BIT(18)
45 #define DEFAULT_MCLK_RATE		9600000
46 #define MI2S_BCLK_RATE			1536000
47 
48 static struct snd_soc_jack_pin apq8016_sbc_jack_pins[] = {
49 	{
50 		.pin = "Mic Jack",
51 		.mask = SND_JACK_MICROPHONE,
52 	},
53 	{
54 		.pin = "Headphone Jack",
55 		.mask = SND_JACK_HEADPHONE,
56 	},
57 };
58 
apq8016_dai_init(struct snd_soc_pcm_runtime * rtd,int mi2s)59 static int apq8016_dai_init(struct snd_soc_pcm_runtime *rtd, int mi2s)
60 {
61 	struct snd_soc_dai *codec_dai;
62 	struct snd_soc_component *component;
63 	struct snd_soc_card *card = rtd->card;
64 	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
65 	int i, rval;
66 	u32 value;
67 
68 	switch (mi2s) {
69 	case MI2S_PRIMARY:
70 		writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
71 			pdata->spkr_iomux);
72 		break;
73 
74 	case MI2S_QUATERNARY:
75 		/* Configure the Quat MI2S to TLMM */
76 		writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
77 			MIC_CTRL_TLMM_SCLK_EN,
78 			pdata->mic_iomux);
79 		break;
80 	case MI2S_SECONDARY:
81 		/* Clear TLMM_WS_OUT_SEL and TLMM_WS_EN_SEL fields */
82 		value = readl(pdata->spkr_iomux) &
83 			~(SPKR_CTL_TLMM_WS_OUT_SEL_MASK | SPKR_CTL_TLMM_WS_EN_SEL_MASK);
84 		/* Configure the Sec MI2S to TLMM */
85 		writel(value | SPKR_CTL_TLMM_MCLK_EN | SPKR_CTL_TLMM_SCLK_EN |
86 			SPKR_CTL_TLMM_DATA1_EN | SPKR_CTL_TLMM_WS_OUT_SEL_SEC |
87 			SPKR_CTL_TLMM_WS_EN_SEL_SEC, pdata->spkr_iomux);
88 		break;
89 	case MI2S_TERTIARY:
90 		writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
91 			MIC_CTRL_TLMM_SCLK_EN,
92 			pdata->mic_iomux);
93 
94 		break;
95 
96 	default:
97 		dev_err(card->dev, "unsupported cpu dai configuration\n");
98 		return -EINVAL;
99 
100 	}
101 
102 	if (!pdata->jack_setup) {
103 		struct snd_jack *jack;
104 
105 		rval = snd_soc_card_jack_new_pins(card, "Headset Jack",
106 						  SND_JACK_HEADSET |
107 						  SND_JACK_HEADPHONE |
108 						  SND_JACK_BTN_0 | SND_JACK_BTN_1 |
109 						  SND_JACK_BTN_2 | SND_JACK_BTN_3 |
110 						  SND_JACK_BTN_4,
111 						  &pdata->jack,
112 						  apq8016_sbc_jack_pins,
113 						  ARRAY_SIZE(apq8016_sbc_jack_pins));
114 
115 		if (rval < 0) {
116 			dev_err(card->dev, "Unable to add Headphone Jack\n");
117 			return rval;
118 		}
119 
120 		jack = pdata->jack.jack;
121 
122 		snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
123 		snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
124 		snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
125 		snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
126 		pdata->jack_setup = true;
127 	}
128 
129 	for_each_rtd_codec_dais(rtd, i, codec_dai) {
130 
131 		component = codec_dai->component;
132 		/* Set default mclk for internal codec */
133 		rval = snd_soc_component_set_sysclk(component, 0, 0, DEFAULT_MCLK_RATE,
134 				       SND_SOC_CLOCK_IN);
135 		if (rval != 0 && rval != -ENOTSUPP) {
136 			dev_warn(card->dev, "Failed to set mclk: %d\n", rval);
137 			return rval;
138 		}
139 		rval = snd_soc_component_set_jack(component, &pdata->jack, NULL);
140 		if (rval != 0 && rval != -ENOTSUPP) {
141 			dev_warn(card->dev, "Failed to set jack: %d\n", rval);
142 			return rval;
143 		}
144 	}
145 
146 	return 0;
147 }
148 
apq8016_sbc_dai_init(struct snd_soc_pcm_runtime * rtd)149 static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
150 {
151 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
152 
153 	return apq8016_dai_init(rtd, cpu_dai->id);
154 }
155 
apq8016_sbc_add_ops(struct snd_soc_card * card)156 static void apq8016_sbc_add_ops(struct snd_soc_card *card)
157 {
158 	struct snd_soc_dai_link *link;
159 	int i;
160 
161 	for_each_card_prelinks(card, i, link)
162 		link->init = apq8016_sbc_dai_init;
163 }
164 
qdsp6_dai_get_lpass_id(struct snd_soc_dai * cpu_dai)165 static int qdsp6_dai_get_lpass_id(struct snd_soc_dai *cpu_dai)
166 {
167 	switch (cpu_dai->id) {
168 	case PRIMARY_MI2S_RX:
169 	case PRIMARY_MI2S_TX:
170 		return MI2S_PRIMARY;
171 	case SECONDARY_MI2S_RX:
172 	case SECONDARY_MI2S_TX:
173 		return MI2S_SECONDARY;
174 	case TERTIARY_MI2S_RX:
175 	case TERTIARY_MI2S_TX:
176 		return MI2S_TERTIARY;
177 	case QUATERNARY_MI2S_RX:
178 	case QUATERNARY_MI2S_TX:
179 		return MI2S_QUATERNARY;
180 	default:
181 		return -EINVAL;
182 	}
183 }
184 
msm8916_qdsp6_dai_init(struct snd_soc_pcm_runtime * rtd)185 static int msm8916_qdsp6_dai_init(struct snd_soc_pcm_runtime *rtd)
186 {
187 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
188 
189 	snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
190 	return apq8016_dai_init(rtd, qdsp6_dai_get_lpass_id(cpu_dai));
191 }
192 
msm8916_qdsp6_startup(struct snd_pcm_substream * substream)193 static int msm8916_qdsp6_startup(struct snd_pcm_substream *substream)
194 {
195 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
196 	struct snd_soc_card *card = rtd->card;
197 	struct apq8016_sbc_data *data = snd_soc_card_get_drvdata(card);
198 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
199 	int mi2s, ret;
200 
201 	mi2s = qdsp6_dai_get_lpass_id(cpu_dai);
202 	if (mi2s < 0)
203 		return mi2s;
204 
205 	if (++data->mi2s_clk_count[mi2s] > 1)
206 		return 0;
207 
208 	ret = snd_soc_dai_set_sysclk(cpu_dai, LPAIF_BIT_CLK, MI2S_BCLK_RATE, 0);
209 	if (ret)
210 		dev_err(card->dev, "Failed to enable LPAIF bit clk: %d\n", ret);
211 	return ret;
212 }
213 
msm8916_qdsp6_shutdown(struct snd_pcm_substream * substream)214 static void msm8916_qdsp6_shutdown(struct snd_pcm_substream *substream)
215 {
216 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
217 	struct snd_soc_card *card = rtd->card;
218 	struct apq8016_sbc_data *data = snd_soc_card_get_drvdata(card);
219 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
220 	int mi2s, ret;
221 
222 	mi2s = qdsp6_dai_get_lpass_id(cpu_dai);
223 	if (mi2s < 0)
224 		return;
225 
226 	if (--data->mi2s_clk_count[mi2s] > 0)
227 		return;
228 
229 	ret = snd_soc_dai_set_sysclk(cpu_dai, LPAIF_BIT_CLK, 0, 0);
230 	if (ret)
231 		dev_err(card->dev, "Failed to disable LPAIF bit clk: %d\n", ret);
232 }
233 
234 static const struct snd_soc_ops msm8916_qdsp6_be_ops = {
235 	.startup = msm8916_qdsp6_startup,
236 	.shutdown = msm8916_qdsp6_shutdown,
237 };
238 
msm8916_qdsp6_be_hw_params_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)239 static int msm8916_qdsp6_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
240 					    struct snd_pcm_hw_params *params)
241 {
242 	struct snd_interval *rate = hw_param_interval(params,
243 					SNDRV_PCM_HW_PARAM_RATE);
244 	struct snd_interval *channels = hw_param_interval(params,
245 					SNDRV_PCM_HW_PARAM_CHANNELS);
246 	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
247 
248 	rate->min = rate->max = 48000;
249 	channels->min = channels->max = 2;
250 	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
251 
252 	return 0;
253 }
254 
msm8916_qdsp6_add_ops(struct snd_soc_card * card)255 static void msm8916_qdsp6_add_ops(struct snd_soc_card *card)
256 {
257 	struct snd_soc_dai_link *link;
258 	int i;
259 
260 	/* Make it obvious to userspace that QDSP6 is used */
261 	card->components = "qdsp6";
262 
263 	for_each_card_prelinks(card, i, link) {
264 		if (link->no_pcm) {
265 			link->init = msm8916_qdsp6_dai_init;
266 			link->ops = &msm8916_qdsp6_be_ops;
267 			link->be_hw_params_fixup = msm8916_qdsp6_be_hw_params_fixup;
268 		}
269 	}
270 }
271 
272 static const struct snd_kcontrol_new apq8016_sbc_snd_controls[] = {
273 	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
274 	SOC_DAPM_PIN_SWITCH("Mic Jack"),
275 };
276 
277 static const struct snd_soc_dapm_widget apq8016_sbc_dapm_widgets[] = {
278 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
279 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
280 	SND_SOC_DAPM_MIC("Handset Mic", NULL),
281 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
282 	SND_SOC_DAPM_MIC("Secondary Mic", NULL),
283 	SND_SOC_DAPM_MIC("Digital Mic1", NULL),
284 	SND_SOC_DAPM_MIC("Digital Mic2", NULL),
285 };
286 
apq8016_sbc_platform_probe(struct platform_device * pdev)287 static int apq8016_sbc_platform_probe(struct platform_device *pdev)
288 {
289 	void (*add_ops)(struct snd_soc_card *card);
290 	struct device *dev = &pdev->dev;
291 	struct snd_soc_card *card;
292 	struct apq8016_sbc_data *data;
293 	int ret;
294 
295 	add_ops = device_get_match_data(&pdev->dev);
296 	if (!add_ops)
297 		return -EINVAL;
298 
299 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
300 	if (!data)
301 		return -ENOMEM;
302 
303 	card = &data->card;
304 	card->dev = dev;
305 	card->owner = THIS_MODULE;
306 	card->dapm_widgets = apq8016_sbc_dapm_widgets;
307 	card->num_dapm_widgets = ARRAY_SIZE(apq8016_sbc_dapm_widgets);
308 	card->controls = apq8016_sbc_snd_controls;
309 	card->num_controls = ARRAY_SIZE(apq8016_sbc_snd_controls);
310 
311 	ret = qcom_snd_parse_of(card);
312 	if (ret)
313 		return ret;
314 
315 	data->mic_iomux = devm_platform_ioremap_resource_byname(pdev, "mic-iomux");
316 	if (IS_ERR(data->mic_iomux))
317 		return PTR_ERR(data->mic_iomux);
318 
319 	data->spkr_iomux = devm_platform_ioremap_resource_byname(pdev, "spkr-iomux");
320 	if (IS_ERR(data->spkr_iomux))
321 		return PTR_ERR(data->spkr_iomux);
322 
323 	snd_soc_card_set_drvdata(card, data);
324 
325 	add_ops(card);
326 	return devm_snd_soc_register_card(&pdev->dev, card);
327 }
328 
329 static const struct of_device_id apq8016_sbc_device_id[] __maybe_unused = {
330 	{ .compatible = "qcom,apq8016-sbc-sndcard", .data = apq8016_sbc_add_ops },
331 	{ .compatible = "qcom,msm8916-qdsp6-sndcard", .data = msm8916_qdsp6_add_ops },
332 	{},
333 };
334 MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
335 
336 static struct platform_driver apq8016_sbc_platform_driver = {
337 	.driver = {
338 		.name = "qcom-apq8016-sbc",
339 		.of_match_table = of_match_ptr(apq8016_sbc_device_id),
340 	},
341 	.probe = apq8016_sbc_platform_probe,
342 };
343 module_platform_driver(apq8016_sbc_platform_driver);
344 
345 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
346 MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
347 MODULE_LICENSE("GPL");
348