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
35 struct 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
tegra_wm8903_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)44 static 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
85 static const struct snd_soc_ops tegra_wm8903_ops = {
86 .hw_params = tegra_wm8903_hw_params,
87 };
88
89 static struct snd_soc_jack tegra_wm8903_hp_jack;
90
91 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
92 {
93 .pin = "Headphone Jack",
94 .mask = SND_JACK_HEADPHONE,
95 },
96 };
97
98 static 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
105 static struct snd_soc_jack tegra_wm8903_mic_jack;
106
107 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
108 {
109 .pin = "Mic Jack",
110 .mask = SND_JACK_MICROPHONE,
111 },
112 };
113
tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)114 static 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
tegra_wm8903_event_hp(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)130 static 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
tegra_wm8903_event_int_mic(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)146 static 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
162 static 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
169 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
170 SOC_DAPM_PIN_SWITCH("Int Spk"),
171 SOC_DAPM_PIN_SWITCH("Int Mic"),
172 };
173
tegra_wm8903_init(struct snd_soc_pcm_runtime * rtd)174 static 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
tegra_wm8903_remove(struct snd_soc_card * card)208 static 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
220 SND_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
225 static 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
236 static struct snd_soc_card snd_soc_tegra_wm8903 = {
237 .name = "tegra-wm8903",
238 .owner = THIS_MODULE,
239 .dai_link = &tegra_wm8903_dai,
240 .num_links = 1,
241 .remove = tegra_wm8903_remove,
242 .controls = tegra_wm8903_controls,
243 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
244 .dapm_widgets = tegra_wm8903_dapm_widgets,
245 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
246 .fully_routed = true,
247 };
248
tegra_wm8903_driver_probe(struct platform_device * pdev)249 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
250 {
251 struct device_node *np = pdev->dev.of_node;
252 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
253 struct tegra_wm8903 *machine;
254 int ret;
255
256 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
257 GFP_KERNEL);
258 if (!machine)
259 return -ENOMEM;
260
261 card->dev = &pdev->dev;
262 snd_soc_card_set_drvdata(card, machine);
263
264 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
265 0);
266 if (machine->gpio_spkr_en == -EPROBE_DEFER)
267 return -EPROBE_DEFER;
268 if (gpio_is_valid(machine->gpio_spkr_en)) {
269 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
270 GPIOF_OUT_INIT_LOW, "spkr_en");
271 if (ret) {
272 dev_err(card->dev, "cannot get spkr_en gpio\n");
273 return ret;
274 }
275 }
276
277 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
278 0);
279 if (machine->gpio_hp_mute == -EPROBE_DEFER)
280 return -EPROBE_DEFER;
281 if (gpio_is_valid(machine->gpio_hp_mute)) {
282 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
283 GPIOF_OUT_INIT_HIGH, "hp_mute");
284 if (ret) {
285 dev_err(card->dev, "cannot get hp_mute gpio\n");
286 return ret;
287 }
288 }
289
290 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
291 if (machine->gpio_hp_det == -EPROBE_DEFER)
292 return -EPROBE_DEFER;
293
294 machine->gpio_int_mic_en = of_get_named_gpio(np,
295 "nvidia,int-mic-en-gpios", 0);
296 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
297 return -EPROBE_DEFER;
298 if (gpio_is_valid(machine->gpio_int_mic_en)) {
299 /* Disable int mic; enable signal is active-high */
300 ret = devm_gpio_request_one(&pdev->dev,
301 machine->gpio_int_mic_en,
302 GPIOF_OUT_INIT_LOW, "int_mic_en");
303 if (ret) {
304 dev_err(card->dev, "cannot get int_mic_en gpio\n");
305 return ret;
306 }
307 }
308
309 machine->gpio_ext_mic_en = of_get_named_gpio(np,
310 "nvidia,ext-mic-en-gpios", 0);
311 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
312 return -EPROBE_DEFER;
313 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
314 /* Enable ext mic; enable signal is active-low */
315 ret = devm_gpio_request_one(&pdev->dev,
316 machine->gpio_ext_mic_en,
317 GPIOF_OUT_INIT_LOW, "ext_mic_en");
318 if (ret) {
319 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
320 return ret;
321 }
322 }
323
324 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
325 if (ret)
326 return ret;
327
328 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
329 if (ret)
330 return ret;
331
332 tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np,
333 "nvidia,audio-codec", 0);
334 if (!tegra_wm8903_dai.codecs->of_node) {
335 dev_err(&pdev->dev,
336 "Property 'nvidia,audio-codec' missing or invalid\n");
337 return -EINVAL;
338 }
339
340 tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np,
341 "nvidia,i2s-controller", 0);
342 if (!tegra_wm8903_dai.cpus->of_node) {
343 dev_err(&pdev->dev,
344 "Property 'nvidia,i2s-controller' missing or invalid\n");
345 return -EINVAL;
346 }
347
348 tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node;
349
350 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
351 if (ret)
352 return ret;
353
354 ret = devm_snd_soc_register_card(&pdev->dev, card);
355 if (ret)
356 return dev_err_probe(&pdev->dev, ret,
357 "snd_soc_register_card failed\n");
358
359 return 0;
360 }
361
362 static const struct of_device_id tegra_wm8903_of_match[] = {
363 { .compatible = "nvidia,tegra-audio-wm8903", },
364 {},
365 };
366
367 static struct platform_driver tegra_wm8903_driver = {
368 .driver = {
369 .name = DRV_NAME,
370 .pm = &snd_soc_pm_ops,
371 .of_match_table = tegra_wm8903_of_match,
372 },
373 .probe = tegra_wm8903_driver_probe,
374 };
375 module_platform_driver(tegra_wm8903_driver);
376
377 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
378 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
379 MODULE_LICENSE("GPL");
380 MODULE_ALIAS("platform:" DRV_NAME);
381 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
382