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31#include <linux/module.h>
32#include <linux/platform_device.h>
33#include <linux/slab.h>
34#include <linux/gpio.h>
35#include <linux/of_gpio.h>
36
37#include <sound/core.h>
38#include <sound/jack.h>
39#include <sound/pcm.h>
40#include <sound/pcm_params.h>
41#include <sound/soc.h>
42
43#include "../codecs/wm8903.h"
44
45#include "tegra_asoc_utils.h"
46
47#define DRV_NAME "tegra-snd-wm8903"
48
49struct tegra_wm8903 {
50 int gpio_spkr_en;
51 int gpio_hp_det;
52 int gpio_hp_mute;
53 int gpio_int_mic_en;
54 int gpio_ext_mic_en;
55 struct tegra_asoc_utils_data util_data;
56};
57
58static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60{
61 struct snd_soc_pcm_runtime *rtd = substream->private_data;
62 struct snd_soc_dai *codec_dai = rtd->codec_dai;
63 struct snd_soc_codec *codec = codec_dai->codec;
64 struct snd_soc_card *card = codec->card;
65 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
66 int srate, mclk;
67 int err;
68
69 srate = params_rate(params);
70 switch (srate) {
71 case 64000:
72 case 88200:
73 case 96000:
74 mclk = 128 * srate;
75 break;
76 default:
77 mclk = 256 * srate;
78 break;
79 }
80
81 while (mclk < 6000000)
82 mclk *= 2;
83
84 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
85 if (err < 0) {
86 dev_err(card->dev, "Can't configure clocks\n");
87 return err;
88 }
89
90 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
91 SND_SOC_CLOCK_IN);
92 if (err < 0) {
93 dev_err(card->dev, "codec_dai clock not set\n");
94 return err;
95 }
96
97 return 0;
98}
99
100static struct snd_soc_ops tegra_wm8903_ops = {
101 .hw_params = tegra_wm8903_hw_params,
102};
103
104static struct snd_soc_jack tegra_wm8903_hp_jack;
105
106static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
107 {
108 .pin = "Headphone Jack",
109 .mask = SND_JACK_HEADPHONE,
110 },
111};
112
113static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
114 .name = "headphone detect",
115 .report = SND_JACK_HEADPHONE,
116 .debounce_time = 150,
117 .invert = 1,
118};
119
120static struct snd_soc_jack tegra_wm8903_mic_jack;
121
122static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
123 {
124 .pin = "Mic Jack",
125 .mask = SND_JACK_MICROPHONE,
126 },
127};
128
129static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
130 struct snd_kcontrol *k, int event)
131{
132 struct snd_soc_dapm_context *dapm = w->dapm;
133 struct snd_soc_card *card = dapm->card;
134 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
135
136 if (!gpio_is_valid(machine->gpio_spkr_en))
137 return 0;
138
139 gpio_set_value_cansleep(machine->gpio_spkr_en,
140 SND_SOC_DAPM_EVENT_ON(event));
141
142 return 0;
143}
144
145static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
146 struct snd_kcontrol *k, int event)
147{
148 struct snd_soc_dapm_context *dapm = w->dapm;
149 struct snd_soc_card *card = dapm->card;
150 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
151
152 if (!gpio_is_valid(machine->gpio_hp_mute))
153 return 0;
154
155 gpio_set_value_cansleep(machine->gpio_hp_mute,
156 !SND_SOC_DAPM_EVENT_ON(event));
157
158 return 0;
159}
160
161static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
162 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
163 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
164 SND_SOC_DAPM_MIC("Mic Jack", NULL),
165};
166
167static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
168 SOC_DAPM_PIN_SWITCH("Int Spk"),
169};
170
171static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
172{
173 struct snd_soc_dai *codec_dai = rtd->codec_dai;
174 struct snd_soc_codec *codec = codec_dai->codec;
175 struct snd_soc_dapm_context *dapm = &codec->dapm;
176 struct snd_soc_card *card = codec->card;
177 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
178
179 if (gpio_is_valid(machine->gpio_hp_det)) {
180 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
181 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
182 &tegra_wm8903_hp_jack);
183 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
184 ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
185 tegra_wm8903_hp_jack_pins);
186 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
187 1,
188 &tegra_wm8903_hp_jack_gpio);
189 }
190
191 snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
192 &tegra_wm8903_mic_jack);
193 snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
194 ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
195 tegra_wm8903_mic_jack_pins);
196 wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
197 0);
198
199 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
200
201 return 0;
202}
203
204static int tegra_wm8903_remove(struct snd_soc_card *card)
205{
206 struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
207 struct snd_soc_dai *codec_dai = rtd->codec_dai;
208 struct snd_soc_codec *codec = codec_dai->codec;
209 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
210
211 if (gpio_is_valid(machine->gpio_hp_det)) {
212 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
213 &tegra_wm8903_hp_jack_gpio);
214 }
215
216 wm8903_mic_detect(codec, NULL, 0, 0);
217
218 return 0;
219}
220
221static struct snd_soc_dai_link tegra_wm8903_dai = {
222 .name = "WM8903",
223 .stream_name = "WM8903 PCM",
224 .codec_dai_name = "wm8903-hifi",
225 .init = tegra_wm8903_init,
226 .ops = &tegra_wm8903_ops,
227 .dai_fmt = SND_SOC_DAIFMT_I2S |
228 SND_SOC_DAIFMT_NB_NF |
229 SND_SOC_DAIFMT_CBS_CFS,
230};
231
232static struct snd_soc_card snd_soc_tegra_wm8903 = {
233 .name = "tegra-wm8903",
234 .owner = THIS_MODULE,
235 .dai_link = &tegra_wm8903_dai,
236 .num_links = 1,
237 .remove = tegra_wm8903_remove,
238 .controls = tegra_wm8903_controls,
239 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
240 .dapm_widgets = tegra_wm8903_dapm_widgets,
241 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
242 .fully_routed = true,
243};
244
245static int tegra_wm8903_driver_probe(struct platform_device *pdev)
246{
247 struct device_node *np = pdev->dev.of_node;
248 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
249 struct tegra_wm8903 *machine;
250 int ret;
251
252 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
253 GFP_KERNEL);
254 if (!machine) {
255 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
256 return -ENOMEM;
257 }
258
259 card->dev = &pdev->dev;
260 platform_set_drvdata(pdev, card);
261 snd_soc_card_set_drvdata(card, machine);
262
263 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
264 0);
265 if (machine->gpio_spkr_en == -EPROBE_DEFER)
266 return -EPROBE_DEFER;
267 if (gpio_is_valid(machine->gpio_spkr_en)) {
268 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
269 GPIOF_OUT_INIT_LOW, "spkr_en");
270 if (ret) {
271 dev_err(card->dev, "cannot get spkr_en gpio\n");
272 return ret;
273 }
274 }
275
276 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
277 0);
278 if (machine->gpio_hp_mute == -EPROBE_DEFER)
279 return -EPROBE_DEFER;
280 if (gpio_is_valid(machine->gpio_hp_mute)) {
281 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
282 GPIOF_OUT_INIT_HIGH, "hp_mute");
283 if (ret) {
284 dev_err(card->dev, "cannot get hp_mute gpio\n");
285 return ret;
286 }
287 }
288
289 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
290 if (machine->gpio_hp_det == -EPROBE_DEFER)
291 return -EPROBE_DEFER;
292
293 machine->gpio_int_mic_en = of_get_named_gpio(np,
294 "nvidia,int-mic-en-gpios", 0);
295 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
296 return -EPROBE_DEFER;
297 if (gpio_is_valid(machine->gpio_int_mic_en)) {
298
299 ret = devm_gpio_request_one(&pdev->dev,
300 machine->gpio_int_mic_en,
301 GPIOF_OUT_INIT_LOW, "int_mic_en");
302 if (ret) {
303 dev_err(card->dev, "cannot get int_mic_en gpio\n");
304 return ret;
305 }
306 }
307
308 machine->gpio_ext_mic_en = of_get_named_gpio(np,
309 "nvidia,ext-mic-en-gpios", 0);
310 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
311 return -EPROBE_DEFER;
312 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
313
314 ret = devm_gpio_request_one(&pdev->dev,
315 machine->gpio_ext_mic_en,
316 GPIOF_OUT_INIT_LOW, "ext_mic_en");
317 if (ret) {
318 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
319 return ret;
320 }
321 }
322
323 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
324 if (ret)
325 goto err;
326
327 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
328 if (ret)
329 goto err;
330
331 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
332 "nvidia,audio-codec", 0);
333 if (!tegra_wm8903_dai.codec_of_node) {
334 dev_err(&pdev->dev,
335 "Property 'nvidia,audio-codec' missing or invalid\n");
336 ret = -EINVAL;
337 goto err;
338 }
339
340 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
341 "nvidia,i2s-controller", 0);
342 if (!tegra_wm8903_dai.cpu_of_node) {
343 dev_err(&pdev->dev,
344 "Property 'nvidia,i2s-controller' missing or invalid\n");
345 ret = -EINVAL;
346 goto err;
347 }
348
349 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
350
351 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
352 if (ret)
353 goto err;
354
355 ret = snd_soc_register_card(card);
356 if (ret) {
357 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
358 ret);
359 goto err_fini_utils;
360 }
361
362 return 0;
363
364err_fini_utils:
365 tegra_asoc_utils_fini(&machine->util_data);
366err:
367 return ret;
368}
369
370static int tegra_wm8903_driver_remove(struct platform_device *pdev)
371{
372 struct snd_soc_card *card = platform_get_drvdata(pdev);
373 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
374
375 snd_soc_unregister_card(card);
376
377 tegra_asoc_utils_fini(&machine->util_data);
378
379 return 0;
380}
381
382static const struct of_device_id tegra_wm8903_of_match[] = {
383 { .compatible = "nvidia,tegra-audio-wm8903", },
384 {},
385};
386
387static struct platform_driver tegra_wm8903_driver = {
388 .driver = {
389 .name = DRV_NAME,
390 .owner = THIS_MODULE,
391 .pm = &snd_soc_pm_ops,
392 .of_match_table = tegra_wm8903_of_match,
393 },
394 .probe = tegra_wm8903_driver_probe,
395 .remove = tegra_wm8903_driver_remove,
396};
397module_platform_driver(tegra_wm8903_driver);
398
399MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
400MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
401MODULE_LICENSE("GPL");
402MODULE_ALIAS("platform:" DRV_NAME);
403MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
404
