2 * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
4 * Author: Stephen Warren <swarren@nvidia.com>
5 * Copyright (C) 2010-2012 - NVIDIA, Inc.
7 * Based on code copyright/by:
9 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
11 * Copyright 2007 Wolfson Microelectronics PLC.
12 * Author: Graeme Gregory
13 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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.
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.
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
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>
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>
43 #include "../codecs/wm8903.h"
45 #include "tegra_asoc_utils.h"
47 #define DRV_NAME "tegra-snd-wm8903"
55 struct tegra_asoc_utils_data util_data;
58 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
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);
68 srate = params_rate(params);
79 /* FIXME: Codec only requires >= 3MHz if OSR==0 */
80 while (mclk < 6000000)
83 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
85 dev_err(card->dev, "Can't configure clocks\n");
89 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
92 dev_err(card->dev, "codec_dai clock not set\n");
99 static const struct snd_soc_ops tegra_wm8903_ops = {
100 .hw_params = tegra_wm8903_hw_params,
103 static struct snd_soc_jack tegra_wm8903_hp_jack;
105 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
107 .pin = "Headphone Jack",
108 .mask = SND_JACK_HEADPHONE,
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,
119 static struct snd_soc_jack tegra_wm8903_mic_jack;
121 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
124 .mask = SND_JACK_MICROPHONE,
128 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
129 struct snd_kcontrol *k, int event)
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);
135 if (!gpio_is_valid(machine->gpio_spkr_en))
138 gpio_set_value_cansleep(machine->gpio_spkr_en,
139 SND_SOC_DAPM_EVENT_ON(event));
144 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
145 struct snd_kcontrol *k, int event)
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);
151 if (!gpio_is_valid(machine->gpio_hp_mute))
154 gpio_set_value_cansleep(machine->gpio_hp_mute,
155 !SND_SOC_DAPM_EVENT_ON(event));
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),
166 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
167 SOC_DAPM_PIN_SWITCH("Int Spk"),
170 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
172 struct snd_soc_dai *codec_dai = rtd->codec_dai;
173 struct snd_soc_component *component = codec_dai->component;
174 struct snd_soc_card *card = rtd->card;
175 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
178 if (gpio_is_valid(machine->gpio_hp_det)) {
179 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
180 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
181 SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
182 tegra_wm8903_hp_jack_pins,
183 ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
184 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
186 &tegra_wm8903_hp_jack_gpio);
189 if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
190 shrt = SND_JACK_MICROPHONE;
192 snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
193 &tegra_wm8903_mic_jack,
194 tegra_wm8903_mic_jack_pins,
195 ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
196 wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
199 snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
204 static int tegra_wm8903_remove(struct snd_soc_card *card)
206 struct snd_soc_pcm_runtime *rtd =
207 snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
208 struct snd_soc_dai *codec_dai = rtd->codec_dai;
209 struct snd_soc_component *component = codec_dai->component;
211 wm8903_mic_detect(component, NULL, 0, 0);
216 static struct snd_soc_dai_link tegra_wm8903_dai = {
218 .stream_name = "WM8903 PCM",
219 .codec_dai_name = "wm8903-hifi",
220 .init = tegra_wm8903_init,
221 .ops = &tegra_wm8903_ops,
222 .dai_fmt = SND_SOC_DAIFMT_I2S |
223 SND_SOC_DAIFMT_NB_NF |
224 SND_SOC_DAIFMT_CBS_CFS,
227 static struct snd_soc_card snd_soc_tegra_wm8903 = {
228 .name = "tegra-wm8903",
229 .driver_name = "tegra",
230 .owner = THIS_MODULE,
231 .dai_link = &tegra_wm8903_dai,
233 .remove = tegra_wm8903_remove,
234 .controls = tegra_wm8903_controls,
235 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
236 .dapm_widgets = tegra_wm8903_dapm_widgets,
237 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
238 .fully_routed = true,
241 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
243 struct device_node *np = pdev->dev.of_node;
244 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
245 struct tegra_wm8903 *machine;
248 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
253 card->dev = &pdev->dev;
254 snd_soc_card_set_drvdata(card, machine);
256 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
258 if (machine->gpio_spkr_en == -EPROBE_DEFER)
259 return -EPROBE_DEFER;
260 if (gpio_is_valid(machine->gpio_spkr_en)) {
261 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
262 GPIOF_OUT_INIT_LOW, "spkr_en");
264 dev_err(card->dev, "cannot get spkr_en gpio\n");
269 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
271 if (machine->gpio_hp_mute == -EPROBE_DEFER)
272 return -EPROBE_DEFER;
273 if (gpio_is_valid(machine->gpio_hp_mute)) {
274 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
275 GPIOF_OUT_INIT_HIGH, "hp_mute");
277 dev_err(card->dev, "cannot get hp_mute gpio\n");
282 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
283 if (machine->gpio_hp_det == -EPROBE_DEFER)
284 return -EPROBE_DEFER;
286 machine->gpio_int_mic_en = of_get_named_gpio(np,
287 "nvidia,int-mic-en-gpios", 0);
288 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
289 return -EPROBE_DEFER;
290 if (gpio_is_valid(machine->gpio_int_mic_en)) {
291 /* Disable int mic; enable signal is active-high */
292 ret = devm_gpio_request_one(&pdev->dev,
293 machine->gpio_int_mic_en,
294 GPIOF_OUT_INIT_LOW, "int_mic_en");
296 dev_err(card->dev, "cannot get int_mic_en gpio\n");
301 machine->gpio_ext_mic_en = of_get_named_gpio(np,
302 "nvidia,ext-mic-en-gpios", 0);
303 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
304 return -EPROBE_DEFER;
305 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
306 /* Enable ext mic; enable signal is active-low */
307 ret = devm_gpio_request_one(&pdev->dev,
308 machine->gpio_ext_mic_en,
309 GPIOF_OUT_INIT_LOW, "ext_mic_en");
311 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
316 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
320 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
324 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
325 "nvidia,audio-codec", 0);
326 if (!tegra_wm8903_dai.codec_of_node) {
328 "Property 'nvidia,audio-codec' missing or invalid\n");
333 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
334 "nvidia,i2s-controller", 0);
335 if (!tegra_wm8903_dai.cpu_of_node) {
337 "Property 'nvidia,i2s-controller' missing or invalid\n");
342 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
344 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
348 ret = snd_soc_register_card(card);
350 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
358 tegra_asoc_utils_fini(&machine->util_data);
363 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
365 struct snd_soc_card *card = platform_get_drvdata(pdev);
366 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
368 snd_soc_unregister_card(card);
370 tegra_asoc_utils_fini(&machine->util_data);
375 static const struct of_device_id tegra_wm8903_of_match[] = {
376 { .compatible = "nvidia,tegra-audio-wm8903", },
380 static struct platform_driver tegra_wm8903_driver = {
383 .pm = &snd_soc_pm_ops,
384 .of_match_table = tegra_wm8903_of_match,
386 .probe = tegra_wm8903_driver_probe,
387 .remove = tegra_wm8903_driver_remove,
389 module_platform_driver(tegra_wm8903_driver);
391 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
392 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
393 MODULE_LICENSE("GPL");
394 MODULE_ALIAS("platform:" DRV_NAME);
395 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);