1 /*
2 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
3 *
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (C) 2010-2012 - NVIDIA, Inc.
6 *
7 * Based on code copyright/by:
8 *
9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
10 *
11 * Copyright 2007 Wolfson Microelectronics PLC.
12 * Author: Graeme Gregory
13 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * version 2 as published by the Free Software Foundation.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
27 * 02110-1301 USA
28 *
29 */
30
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
49 struct 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
58 static 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_card *card = rtd->card;
64 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
65 int srate, mclk;
66 int err;
67
68 srate = params_rate(params);
69 switch (srate) {
70 case 64000:
71 case 88200:
72 case 96000:
73 mclk = 128 * srate;
74 break;
75 default:
76 mclk = 256 * srate;
77 break;
78 }
79 /* FIXME: Codec only requires >= 3MHz if OSR==0 */
80 while (mclk < 6000000)
81 mclk *= 2;
82
83 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
84 if (err < 0) {
85 dev_err(card->dev, "Can't configure clocks\n");
86 return err;
87 }
88
89 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
90 SND_SOC_CLOCK_IN);
91 if (err < 0) {
92 dev_err(card->dev, "codec_dai clock not set\n");
93 return err;
94 }
95
96 return 0;
97 }
98
99 static const struct snd_soc_ops tegra_wm8903_ops = {
100 .hw_params = tegra_wm8903_hw_params,
101 };
102
103 static struct snd_soc_jack tegra_wm8903_hp_jack;
104
105 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
106 {
107 .pin = "Headphone Jack",
108 .mask = SND_JACK_HEADPHONE,
109 },
110 };
111
112 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
113 .name = "headphone detect",
114 .report = SND_JACK_HEADPHONE,
115 .debounce_time = 150,
116 .invert = 1,
117 };
118
119 static struct snd_soc_jack tegra_wm8903_mic_jack;
120
121 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
122 {
123 .pin = "Mic Jack",
124 .mask = SND_JACK_MICROPHONE,
125 },
126 };
127
128 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
129 struct snd_kcontrol *k, int event)
130 {
131 struct snd_soc_dapm_context *dapm = w->dapm;
132 struct snd_soc_card *card = dapm->card;
133 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
134
135 if (!gpio_is_valid(machine->gpio_spkr_en))
136 return 0;
137
138 gpio_set_value_cansleep(machine->gpio_spkr_en,
139 SND_SOC_DAPM_EVENT_ON(event));
140
141 return 0;
142 }
143
144 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
145 struct snd_kcontrol *k, int event)
146 {
147 struct snd_soc_dapm_context *dapm = w->dapm;
148 struct snd_soc_card *card = dapm->card;
149 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
150
151 if (!gpio_is_valid(machine->gpio_hp_mute))
152 return 0;
153
154 gpio_set_value_cansleep(machine->gpio_hp_mute,
155 !SND_SOC_DAPM_EVENT_ON(event));
156
157 return 0;
158 }
159
160 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
161 SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
162 SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
163 SND_SOC_DAPM_MIC("Mic Jack", NULL),
164 };
165
166 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
167 SOC_DAPM_PIN_SWITCH("Int Spk"),
168 };
169
170 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
171 {
172 struct snd_soc_dai *codec_dai = rtd->codec_dai;
173 struct snd_soc_codec *codec = codec_dai->codec;
174 struct snd_soc_card *card = rtd->card;
175 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
176
177 if (gpio_is_valid(machine->gpio_hp_det)) {
178 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
179 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
180 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
181 tegra_wm8903_hp_jack_pins,
182 ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
183 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
184 1,
185 &tegra_wm8903_hp_jack_gpio);
186 }
187
188 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
189 &tegra_wm8903_mic_jack,
190 tegra_wm8903_mic_jack_pins,
191 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
192 wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
193 0);
194
195 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
196
197 return 0;
198 }
199
200 static int tegra_wm8903_remove(struct snd_soc_card *card)
201 {
202 struct snd_soc_pcm_runtime *rtd =
203 snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
204 struct snd_soc_dai *codec_dai = rtd->codec_dai;
205 struct snd_soc_codec *codec = codec_dai->codec;
206 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
207
208 if (gpio_is_valid(machine->gpio_hp_det)) {
209 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
210 &tegra_wm8903_hp_jack_gpio);
211 }
212
213 wm8903_mic_detect(codec, NULL, 0, 0);
214
215 return 0;
216 }
217
218 static struct snd_soc_dai_link tegra_wm8903_dai = {
219 .name = "WM8903",
220 .stream_name = "WM8903 PCM",
221 .codec_dai_name = "wm8903-hifi",
222 .init = tegra_wm8903_init,
223 .ops = &tegra_wm8903_ops,
224 .dai_fmt = SND_SOC_DAIFMT_I2S |
225 SND_SOC_DAIFMT_NB_NF |
226 SND_SOC_DAIFMT_CBS_CFS,
227 };
228
229 static struct snd_soc_card snd_soc_tegra_wm8903 = {
230 .name = "tegra-wm8903",
231 .owner = THIS_MODULE,
232 .dai_link = &tegra_wm8903_dai,
233 .num_links = 1,
234 .remove = tegra_wm8903_remove,
235 .controls = tegra_wm8903_controls,
236 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
237 .dapm_widgets = tegra_wm8903_dapm_widgets,
238 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
239 .fully_routed = true,
240 };
241
242 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
243 {
244 struct device_node *np = pdev->dev.of_node;
245 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
246 struct tegra_wm8903 *machine;
247 int ret;
248
249 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
250 GFP_KERNEL);
251 if (!machine)
252 return -ENOMEM;
253
254 card->dev = &pdev->dev;
255 platform_set_drvdata(pdev, card);
256 snd_soc_card_set_drvdata(card, machine);
257
258 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
259 0);
260 if (machine->gpio_spkr_en == -EPROBE_DEFER)
261 return -EPROBE_DEFER;
262 if (gpio_is_valid(machine->gpio_spkr_en)) {
263 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
264 GPIOF_OUT_INIT_LOW, "spkr_en");
265 if (ret) {
266 dev_err(card->dev, "cannot get spkr_en gpio\n");
267 return ret;
268 }
269 }
270
271 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
272 0);
273 if (machine->gpio_hp_mute == -EPROBE_DEFER)
274 return -EPROBE_DEFER;
275 if (gpio_is_valid(machine->gpio_hp_mute)) {
276 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
277 GPIOF_OUT_INIT_HIGH, "hp_mute");
278 if (ret) {
279 dev_err(card->dev, "cannot get hp_mute gpio\n");
280 return ret;
281 }
282 }
283
284 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
285 if (machine->gpio_hp_det == -EPROBE_DEFER)
286 return -EPROBE_DEFER;
287
288 machine->gpio_int_mic_en = of_get_named_gpio(np,
289 "nvidia,int-mic-en-gpios", 0);
290 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
291 return -EPROBE_DEFER;
292 if (gpio_is_valid(machine->gpio_int_mic_en)) {
293 /* Disable int mic; enable signal is active-high */
294 ret = devm_gpio_request_one(&pdev->dev,
295 machine->gpio_int_mic_en,
296 GPIOF_OUT_INIT_LOW, "int_mic_en");
297 if (ret) {
298 dev_err(card->dev, "cannot get int_mic_en gpio\n");
299 return ret;
300 }
301 }
302
303 machine->gpio_ext_mic_en = of_get_named_gpio(np,
304 "nvidia,ext-mic-en-gpios", 0);
305 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
306 return -EPROBE_DEFER;
307 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
308 /* Enable ext mic; enable signal is active-low */
309 ret = devm_gpio_request_one(&pdev->dev,
310 machine->gpio_ext_mic_en,
311 GPIOF_OUT_INIT_LOW, "ext_mic_en");
312 if (ret) {
313 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
314 return ret;
315 }
316 }
317
318 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
319 if (ret)
320 goto err;
321
322 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
323 if (ret)
324 goto err;
325
326 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
327 "nvidia,audio-codec", 0);
328 if (!tegra_wm8903_dai.codec_of_node) {
329 dev_err(&pdev->dev,
330 "Property 'nvidia,audio-codec' missing or invalid\n");
331 ret = -EINVAL;
332 goto err;
333 }
334
335 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
336 "nvidia,i2s-controller", 0);
337 if (!tegra_wm8903_dai.cpu_of_node) {
338 dev_err(&pdev->dev,
339 "Property 'nvidia,i2s-controller' missing or invalid\n");
340 ret = -EINVAL;
341 goto err;
342 }
343
344 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
345
346 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
347 if (ret)
348 goto err;
349
350 ret = snd_soc_register_card(card);
351 if (ret) {
352 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
353 ret);
354 goto err_fini_utils;
355 }
356
357 return 0;
358
359 err_fini_utils:
360 tegra_asoc_utils_fini(&machine->util_data);
361 err:
362 return ret;
363 }
364
365 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
366 {
367 struct snd_soc_card *card = platform_get_drvdata(pdev);
368 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
369
370 snd_soc_unregister_card(card);
371
372 tegra_asoc_utils_fini(&machine->util_data);
373
374 return 0;
375 }
376
377 static const struct of_device_id tegra_wm8903_of_match[] = {
378 { .compatible = "nvidia,tegra-audio-wm8903", },
379 {},
380 };
381
382 static struct platform_driver tegra_wm8903_driver = {
383 .driver = {
384 .name = DRV_NAME,
385 .pm = &snd_soc_pm_ops,
386 .of_match_table = tegra_wm8903_of_match,
387 },
388 .probe = tegra_wm8903_driver_probe,
389 .remove = tegra_wm8903_driver_remove,
390 };
391 module_platform_driver(tegra_wm8903_driver);
392
393 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
394 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
395 MODULE_LICENSE("GPL");
396 MODULE_ALIAS("platform:" DRV_NAME);
397 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
398
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.