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 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_codec *codec = codec_dai->codec;
174 struct snd_soc_dapm_context *dapm = &codec->dapm;
175 struct snd_soc_card *card = rtd->card;
176 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_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
181 &tegra_wm8903_hp_jack);
182 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
183 ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
184 tegra_wm8903_hp_jack_pins);
185 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
187 &tegra_wm8903_hp_jack_gpio);
190 snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
191 &tegra_wm8903_mic_jack);
192 snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
193 ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
194 tegra_wm8903_mic_jack_pins);
195 wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
198 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
203 static int tegra_wm8903_remove(struct snd_soc_card *card)
205 struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
206 struct snd_soc_dai *codec_dai = rtd->codec_dai;
207 struct snd_soc_codec *codec = codec_dai->codec;
208 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
210 if (gpio_is_valid(machine->gpio_hp_det)) {
211 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
212 &tegra_wm8903_hp_jack_gpio);
215 wm8903_mic_detect(codec, NULL, 0, 0);
220 static struct snd_soc_dai_link tegra_wm8903_dai = {
222 .stream_name = "WM8903 PCM",
223 .codec_dai_name = "wm8903-hifi",
224 .init = tegra_wm8903_init,
225 .ops = &tegra_wm8903_ops,
226 .dai_fmt = SND_SOC_DAIFMT_I2S |
227 SND_SOC_DAIFMT_NB_NF |
228 SND_SOC_DAIFMT_CBS_CFS,
231 static struct snd_soc_card snd_soc_tegra_wm8903 = {
232 .name = "tegra-wm8903",
233 .owner = THIS_MODULE,
234 .dai_link = &tegra_wm8903_dai,
236 .remove = tegra_wm8903_remove,
237 .controls = tegra_wm8903_controls,
238 .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
239 .dapm_widgets = tegra_wm8903_dapm_widgets,
240 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
241 .fully_routed = true,
244 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
246 struct device_node *np = pdev->dev.of_node;
247 struct snd_soc_card *card = &snd_soc_tegra_wm8903;
248 struct tegra_wm8903 *machine;
251 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
254 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
258 card->dev = &pdev->dev;
259 platform_set_drvdata(pdev, card);
260 snd_soc_card_set_drvdata(card, machine);
262 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
264 if (machine->gpio_spkr_en == -EPROBE_DEFER)
265 return -EPROBE_DEFER;
266 if (gpio_is_valid(machine->gpio_spkr_en)) {
267 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
268 GPIOF_OUT_INIT_LOW, "spkr_en");
270 dev_err(card->dev, "cannot get spkr_en gpio\n");
275 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
277 if (machine->gpio_hp_mute == -EPROBE_DEFER)
278 return -EPROBE_DEFER;
279 if (gpio_is_valid(machine->gpio_hp_mute)) {
280 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
281 GPIOF_OUT_INIT_HIGH, "hp_mute");
283 dev_err(card->dev, "cannot get hp_mute gpio\n");
288 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
289 if (machine->gpio_hp_det == -EPROBE_DEFER)
290 return -EPROBE_DEFER;
292 machine->gpio_int_mic_en = of_get_named_gpio(np,
293 "nvidia,int-mic-en-gpios", 0);
294 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
295 return -EPROBE_DEFER;
296 if (gpio_is_valid(machine->gpio_int_mic_en)) {
297 /* Disable int mic; enable signal is active-high */
298 ret = devm_gpio_request_one(&pdev->dev,
299 machine->gpio_int_mic_en,
300 GPIOF_OUT_INIT_LOW, "int_mic_en");
302 dev_err(card->dev, "cannot get int_mic_en gpio\n");
307 machine->gpio_ext_mic_en = of_get_named_gpio(np,
308 "nvidia,ext-mic-en-gpios", 0);
309 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
310 return -EPROBE_DEFER;
311 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
312 /* Enable ext mic; enable signal is active-low */
313 ret = devm_gpio_request_one(&pdev->dev,
314 machine->gpio_ext_mic_en,
315 GPIOF_OUT_INIT_LOW, "ext_mic_en");
317 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
322 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
326 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
330 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
331 "nvidia,audio-codec", 0);
332 if (!tegra_wm8903_dai.codec_of_node) {
334 "Property 'nvidia,audio-codec' missing or invalid\n");
339 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
340 "nvidia,i2s-controller", 0);
341 if (!tegra_wm8903_dai.cpu_of_node) {
343 "Property 'nvidia,i2s-controller' missing or invalid\n");
348 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
350 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
354 ret = snd_soc_register_card(card);
356 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
364 tegra_asoc_utils_fini(&machine->util_data);
369 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
371 struct snd_soc_card *card = platform_get_drvdata(pdev);
372 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
374 snd_soc_unregister_card(card);
376 tegra_asoc_utils_fini(&machine->util_data);
381 static const struct of_device_id tegra_wm8903_of_match[] = {
382 { .compatible = "nvidia,tegra-audio-wm8903", },
386 static struct platform_driver tegra_wm8903_driver = {
389 .owner = THIS_MODULE,
390 .pm = &snd_soc_pm_ops,
391 .of_match_table = tegra_wm8903_of_match,
393 .probe = tegra_wm8903_driver_probe,
394 .remove = tegra_wm8903_driver_remove,
396 module_platform_driver(tegra_wm8903_driver);
398 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
399 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
400 MODULE_LICENSE("GPL");
401 MODULE_ALIAS("platform:" DRV_NAME);
402 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);