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 = substream->private_data;
48 struct snd_soc_dai *codec_dai = rtd->codec_dai;
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
146 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
147 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
148 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
149 SND_SOC_DAPM_MIC("Mic Jack", NULL),
150 };
151
152 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
153 SOC_DAPM_PIN_SWITCH("Int Spk"),
154 };
155
tegra_wm8903_init(struct snd_soc_pcm_runtime * rtd)156 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
157 {
158 struct snd_soc_dai *codec_dai = rtd->codec_dai;
159 struct snd_soc_component *component = codec_dai->component;
160 struct snd_soc_card *card = rtd->card;
161 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
162 int shrt = 0;
163
164 if (gpio_is_valid(machine->gpio_hp_det)) {
165 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
166 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
167 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
168 tegra_wm8903_hp_jack_pins,
169 ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
170 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
171 1,
172 &tegra_wm8903_hp_jack_gpio);
173 }
174
175 if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
176 shrt = SND_JACK_MICROPHONE;
177
178 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
179 &tegra_wm8903_mic_jack,
180 tegra_wm8903_mic_jack_pins,
181 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
182 wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
183 shrt);
184
185 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
186
187 return 0;
188 }
189
tegra_wm8903_remove(struct snd_soc_card * card)190 static int tegra_wm8903_remove(struct snd_soc_card *card)
191 {
192 struct snd_soc_pcm_runtime *rtd =
193 snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
194 struct snd_soc_dai *codec_dai = rtd->codec_dai;
195 struct snd_soc_component *component = codec_dai->component;
196
197 wm8903_mic_detect(component, NULL, 0, 0);
198
199 return 0;
200 }
201
202 SND_SOC_DAILINK_DEFS(hifi,
203 DAILINK_COMP_ARRAY(COMP_EMPTY()),
204 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
205 DAILINK_COMP_ARRAY(COMP_EMPTY()));
206
207 static struct snd_soc_dai_link tegra_wm8903_dai = {
208 .name = "WM8903",
209 .stream_name = "WM8903 PCM",
210 .init = tegra_wm8903_init,
211 .ops = &tegra_wm8903_ops,
212 .dai_fmt = SND_SOC_DAIFMT_I2S |
213 SND_SOC_DAIFMT_NB_NF |
214 SND_SOC_DAIFMT_CBS_CFS,
215 SND_SOC_DAILINK_REG(hifi),
216 };
217
218 static struct snd_soc_card snd_soc_tegra_wm8903 = {
219 .name = "tegra-wm8903",
220 .driver_name = "tegra",
221 .owner = THIS_MODULE,
222 .dai_link = &tegra_wm8903_dai,
223 .num_links = 1,
224 .remove = tegra_wm8903_remove,
225 .controls = tegra_wm8903_controls,
226 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
227 .dapm_widgets = tegra_wm8903_dapm_widgets,
228 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
229 .fully_routed = true,
230 };
231
tegra_wm8903_driver_probe(struct platform_device * pdev)232 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
233 {
234 struct device_node *np = pdev->dev.of_node;
235 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
236 struct tegra_wm8903 *machine;
237 int ret;
238
239 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
240 GFP_KERNEL);
241 if (!machine)
242 return -ENOMEM;
243
244 card->dev = &pdev->dev;
245 snd_soc_card_set_drvdata(card, machine);
246
247 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
248 0);
249 if (machine->gpio_spkr_en == -EPROBE_DEFER)
250 return -EPROBE_DEFER;
251 if (gpio_is_valid(machine->gpio_spkr_en)) {
252 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
253 GPIOF_OUT_INIT_LOW, "spkr_en");
254 if (ret) {
255 dev_err(card->dev, "cannot get spkr_en gpio\n");
256 return ret;
257 }
258 }
259
260 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
261 0);
262 if (machine->gpio_hp_mute == -EPROBE_DEFER)
263 return -EPROBE_DEFER;
264 if (gpio_is_valid(machine->gpio_hp_mute)) {
265 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
266 GPIOF_OUT_INIT_HIGH, "hp_mute");
267 if (ret) {
268 dev_err(card->dev, "cannot get hp_mute gpio\n");
269 return ret;
270 }
271 }
272
273 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
274 if (machine->gpio_hp_det == -EPROBE_DEFER)
275 return -EPROBE_DEFER;
276
277 machine->gpio_int_mic_en = of_get_named_gpio(np,
278 "nvidia,int-mic-en-gpios", 0);
279 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
280 return -EPROBE_DEFER;
281 if (gpio_is_valid(machine->gpio_int_mic_en)) {
282 /* Disable int mic; enable signal is active-high */
283 ret = devm_gpio_request_one(&pdev->dev,
284 machine->gpio_int_mic_en,
285 GPIOF_OUT_INIT_LOW, "int_mic_en");
286 if (ret) {
287 dev_err(card->dev, "cannot get int_mic_en gpio\n");
288 return ret;
289 }
290 }
291
292 machine->gpio_ext_mic_en = of_get_named_gpio(np,
293 "nvidia,ext-mic-en-gpios", 0);
294 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
295 return -EPROBE_DEFER;
296 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
297 /* Enable ext mic; enable signal is active-low */
298 ret = devm_gpio_request_one(&pdev->dev,
299 machine->gpio_ext_mic_en,
300 GPIOF_OUT_INIT_LOW, "ext_mic_en");
301 if (ret) {
302 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
303 return ret;
304 }
305 }
306
307 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
308 if (ret)
309 goto err;
310
311 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
312 if (ret)
313 goto err;
314
315 tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np,
316 "nvidia,audio-codec", 0);
317 if (!tegra_wm8903_dai.codecs->of_node) {
318 dev_err(&pdev->dev,
319 "Property 'nvidia,audio-codec' missing or invalid\n");
320 ret = -EINVAL;
321 goto err;
322 }
323
324 tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np,
325 "nvidia,i2s-controller", 0);
326 if (!tegra_wm8903_dai.cpus->of_node) {
327 dev_err(&pdev->dev,
328 "Property 'nvidia,i2s-controller' missing or invalid\n");
329 ret = -EINVAL;
330 goto err;
331 }
332
333 tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node;
334
335 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
336 if (ret)
337 goto err;
338
339 ret = snd_soc_register_card(card);
340 if (ret) {
341 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
342 ret);
343 goto err_fini_utils;
344 }
345
346 return 0;
347
348 err_fini_utils:
349 tegra_asoc_utils_fini(&machine->util_data);
350 err:
351 return ret;
352 }
353
tegra_wm8903_driver_remove(struct platform_device * pdev)354 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
355 {
356 struct snd_soc_card *card = platform_get_drvdata(pdev);
357 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
358
359 snd_soc_unregister_card(card);
360
361 tegra_asoc_utils_fini(&machine->util_data);
362
363 return 0;
364 }
365
366 static const struct of_device_id tegra_wm8903_of_match[] = {
367 { .compatible = "nvidia,tegra-audio-wm8903", },
368 {},
369 };
370
371 static struct platform_driver tegra_wm8903_driver = {
372 .driver = {
373 .name = DRV_NAME,
374 .pm = &snd_soc_pm_ops,
375 .of_match_table = tegra_wm8903_of_match,
376 },
377 .probe = tegra_wm8903_driver_probe,
378 .remove = tegra_wm8903_driver_remove,
379 };
380 module_platform_driver(tegra_wm8903_driver);
381
382 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
383 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
384 MODULE_LICENSE("GPL");
385 MODULE_ALIAS("platform:" DRV_NAME);
386 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
387