1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
4 *
5 * Author: Stephen Warren <swarren@nvidia.com>
6 * Copyright (C) 2010-2012 - NVIDIA, Inc.
7 *
8 * Based on code copyright/by:
9 *
10 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
11 *
12 * Copyright 2007 Wolfson Microelectronics PLC.
13 * Author: Graeme Gregory
14 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
15 */
16
17#include <linux/module.h>
18#include <linux/platform_device.h>
19#include <linux/slab.h>
20#include <linux/gpio.h>
21#include <linux/of_gpio.h>
22
23#include <sound/core.h>
24#include <sound/jack.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/soc.h>
28
29#include "../codecs/wm8903.h"
30
31#include "tegra_asoc_utils.h"
32
33#define DRV_NAME "tegra-snd-wm8903"
34
35struct tegra_wm8903 {
36	int gpio_spkr_en;
37	int gpio_hp_det;
38	int gpio_hp_mute;
39	int gpio_int_mic_en;
40	int gpio_ext_mic_en;
41	struct tegra_asoc_utils_data util_data;
42};
43
44static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
45					struct snd_pcm_hw_params *params)
46{
47	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
48	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
49	struct snd_soc_card *card = rtd->card;
50	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
51	int srate, mclk;
52	int err;
53
54	srate = params_rate(params);
55	switch (srate) {
56	case 64000:
57	case 88200:
58	case 96000:
59		mclk = 128 * srate;
60		break;
61	default:
62		mclk = 256 * srate;
63		break;
64	}
65	/* FIXME: Codec only requires >= 3MHz if OSR==0 */
66	while (mclk < 6000000)
67		mclk *= 2;
68
69	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
70	if (err < 0) {
71		dev_err(card->dev, "Can't configure clocks\n");
72		return err;
73	}
74
75	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
76					SND_SOC_CLOCK_IN);
77	if (err < 0) {
78		dev_err(card->dev, "codec_dai clock not set\n");
79		return err;
80	}
81
82	return 0;
83}
84
85static const struct snd_soc_ops tegra_wm8903_ops = {
86	.hw_params = tegra_wm8903_hw_params,
87};
88
89static struct snd_soc_jack tegra_wm8903_hp_jack;
90
91static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
92	{
93		.pin = "Headphone Jack",
94		.mask = SND_JACK_HEADPHONE,
95	},
96};
97
98static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
99	.name = "headphone detect",
100	.report = SND_JACK_HEADPHONE,
101	.debounce_time = 150,
102	.invert = 1,
103};
104
105static struct snd_soc_jack tegra_wm8903_mic_jack;
106
107static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
108	{
109		.pin = "Mic Jack",
110		.mask = SND_JACK_MICROPHONE,
111	},
112};
113
114static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
115					struct snd_kcontrol *k, int event)
116{
117	struct snd_soc_dapm_context *dapm = w->dapm;
118	struct snd_soc_card *card = dapm->card;
119	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
120
121	if (!gpio_is_valid(machine->gpio_spkr_en))
122		return 0;
123
124	gpio_set_value_cansleep(machine->gpio_spkr_en,
125				SND_SOC_DAPM_EVENT_ON(event));
126
127	return 0;
128}
129
130static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
131					struct snd_kcontrol *k, int event)
132{
133	struct snd_soc_dapm_context *dapm = w->dapm;
134	struct snd_soc_card *card = dapm->card;
135	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
136
137	if (!gpio_is_valid(machine->gpio_hp_mute))
138		return 0;
139
140	gpio_set_value_cansleep(machine->gpio_hp_mute,
141				!SND_SOC_DAPM_EVENT_ON(event));
142
143	return 0;
144}
145
146static int tegra_wm8903_event_int_mic(struct snd_soc_dapm_widget *w,
147				      struct snd_kcontrol *k, int event)
148{
149	struct snd_soc_dapm_context *dapm = w->dapm;
150	struct snd_soc_card *card = dapm->card;
151	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
152
153	if (!gpio_is_valid(machine->gpio_int_mic_en))
154		return 0;
155
156	gpio_set_value_cansleep(machine->gpio_int_mic_en,
157				SND_SOC_DAPM_EVENT_ON(event));
158
159	return 0;
160}
161
162static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
163	SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
164	SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
165	SND_SOC_DAPM_MIC("Mic Jack", NULL),
166	SND_SOC_DAPM_MIC("Int Mic", tegra_wm8903_event_int_mic),
167};
168
169static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
170	SOC_DAPM_PIN_SWITCH("Int Spk"),
171	SOC_DAPM_PIN_SWITCH("Int Mic"),
172};
173
174static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
175{
176	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
177	struct snd_soc_component *component = codec_dai->component;
178	struct snd_soc_card *card = rtd->card;
179	struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
180	int shrt = 0;
181
182	if (gpio_is_valid(machine->gpio_hp_det)) {
183		tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
184		snd_soc_card_jack_new(rtd->card, "Headphone Jack",
185				      SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
186				      tegra_wm8903_hp_jack_pins,
187				      ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
188		snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
189					1,
190					&tegra_wm8903_hp_jack_gpio);
191	}
192
193	if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
194		shrt = SND_JACK_MICROPHONE;
195
196	snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
197			      &tegra_wm8903_mic_jack,
198			      tegra_wm8903_mic_jack_pins,
199			      ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
200	wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
201				shrt);
202
203	snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
204
205	return 0;
206}
207
208static int tegra_wm8903_remove(struct snd_soc_card *card)
209{
210	struct snd_soc_pcm_runtime *rtd =
211		snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
212	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
213	struct snd_soc_component *component = codec_dai->component;
214
215	wm8903_mic_detect(component, NULL, 0, 0);
216
217	return 0;
218}
219
220SND_SOC_DAILINK_DEFS(hifi,
221	DAILINK_COMP_ARRAY(COMP_EMPTY()),
222	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
223	DAILINK_COMP_ARRAY(COMP_EMPTY()));
224
225static struct snd_soc_dai_link tegra_wm8903_dai = {
226	.name = "WM8903",
227	.stream_name = "WM8903 PCM",
228	.init = tegra_wm8903_init,
229	.ops = &tegra_wm8903_ops,
230	.dai_fmt = SND_SOC_DAIFMT_I2S |
231		   SND_SOC_DAIFMT_NB_NF |
232		   SND_SOC_DAIFMT_CBS_CFS,
233	SND_SOC_DAILINK_REG(hifi),
234};
235
236static struct snd_soc_card snd_soc_tegra_wm8903 = {
237	.name = "tegra-wm8903",
238	.driver_name = "tegra",
239	.owner = THIS_MODULE,
240	.dai_link = &tegra_wm8903_dai,
241	.num_links = 1,
242	.remove = tegra_wm8903_remove,
243	.controls = tegra_wm8903_controls,
244	.num_controls = ARRAY_SIZE(tegra_wm8903_controls),
245	.dapm_widgets = tegra_wm8903_dapm_widgets,
246	.num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
247	.fully_routed = true,
248};
249
250static int tegra_wm8903_driver_probe(struct platform_device *pdev)
251{
252	struct device_node *np = pdev->dev.of_node;
253	struct snd_soc_card *card = &snd_soc_tegra_wm8903;
254	struct tegra_wm8903 *machine;
255	int ret;
256
257	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
258			       GFP_KERNEL);
259	if (!machine)
260		return -ENOMEM;
261
262	card->dev = &pdev->dev;
263	snd_soc_card_set_drvdata(card, machine);
264
265	machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
266						  0);
267	if (machine->gpio_spkr_en == -EPROBE_DEFER)
268		return -EPROBE_DEFER;
269	if (gpio_is_valid(machine->gpio_spkr_en)) {
270		ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
271					    GPIOF_OUT_INIT_LOW, "spkr_en");
272		if (ret) {
273			dev_err(card->dev, "cannot get spkr_en gpio\n");
274			return ret;
275		}
276	}
277
278	machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
279						  0);
280	if (machine->gpio_hp_mute == -EPROBE_DEFER)
281		return -EPROBE_DEFER;
282	if (gpio_is_valid(machine->gpio_hp_mute)) {
283		ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
284					    GPIOF_OUT_INIT_HIGH, "hp_mute");
285		if (ret) {
286			dev_err(card->dev, "cannot get hp_mute gpio\n");
287			return ret;
288		}
289	}
290
291	machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
292	if (machine->gpio_hp_det == -EPROBE_DEFER)
293		return -EPROBE_DEFER;
294
295	machine->gpio_int_mic_en = of_get_named_gpio(np,
296						"nvidia,int-mic-en-gpios", 0);
297	if (machine->gpio_int_mic_en == -EPROBE_DEFER)
298		return -EPROBE_DEFER;
299	if (gpio_is_valid(machine->gpio_int_mic_en)) {
300		/* Disable int mic; enable signal is active-high */
301		ret = devm_gpio_request_one(&pdev->dev,
302					    machine->gpio_int_mic_en,
303					    GPIOF_OUT_INIT_LOW, "int_mic_en");
304		if (ret) {
305			dev_err(card->dev, "cannot get int_mic_en gpio\n");
306			return ret;
307		}
308	}
309
310	machine->gpio_ext_mic_en = of_get_named_gpio(np,
311						"nvidia,ext-mic-en-gpios", 0);
312	if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
313		return -EPROBE_DEFER;
314	if (gpio_is_valid(machine->gpio_ext_mic_en)) {
315		/* Enable ext mic; enable signal is active-low */
316		ret = devm_gpio_request_one(&pdev->dev,
317					    machine->gpio_ext_mic_en,
318					    GPIOF_OUT_INIT_LOW, "ext_mic_en");
319		if (ret) {
320			dev_err(card->dev, "cannot get ext_mic_en gpio\n");
321			return ret;
322		}
323	}
324
325	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
326	if (ret)
327		return ret;
328
329	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
330	if (ret)
331		return ret;
332
333	tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np,
334						"nvidia,audio-codec", 0);
335	if (!tegra_wm8903_dai.codecs->of_node) {
336		dev_err(&pdev->dev,
337			"Property 'nvidia,audio-codec' missing or invalid\n");
338		return -EINVAL;
339	}
340
341	tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np,
342			"nvidia,i2s-controller", 0);
343	if (!tegra_wm8903_dai.cpus->of_node) {
344		dev_err(&pdev->dev,
345			"Property 'nvidia,i2s-controller' missing or invalid\n");
346		return -EINVAL;
347	}
348
349	tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node;
350
351	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
352	if (ret)
353		return ret;
354
355	ret = devm_snd_soc_register_card(&pdev->dev, card);
356	if (ret) {
357		dev_err(&pdev->dev, "devm_snd_soc_register_card failed (%d)\n",
358			ret);
359		return ret;
360	}
361
362	return 0;
363}
364
365static const struct of_device_id tegra_wm8903_of_match[] = {
366	{ .compatible = "nvidia,tegra-audio-wm8903", },
367	{},
368};
369
370static struct platform_driver tegra_wm8903_driver = {
371	.driver = {
372		.name = DRV_NAME,
373		.pm = &snd_soc_pm_ops,
374		.of_match_table = tegra_wm8903_of_match,
375	},
376	.probe = tegra_wm8903_driver_probe,
377};
378module_platform_driver(tegra_wm8903_driver);
379
380MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
381MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
382MODULE_LICENSE("GPL");
383MODULE_ALIAS("platform:" DRV_NAME);
384MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
385