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_codec *codec = codec_dai->codec;
64 struct snd_soc_card *card = codec->card;
65 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
69 srate = params_rate(params);
80 /* FIXME: Codec only requires >= 3MHz if OSR==0 */
81 while (mclk < 6000000)
84 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
86 dev_err(card->dev, "Can't configure clocks\n");
90 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
93 dev_err(card->dev, "codec_dai clock not set\n");
100 static struct snd_soc_ops tegra_wm8903_ops = {
101 .hw_params = tegra_wm8903_hw_params,
104 static struct snd_soc_jack tegra_wm8903_hp_jack;
106 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
108 .pin = "Headphone Jack",
109 .mask = SND_JACK_HEADPHONE,
113 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
114 .name = "headphone detect",
115 .report = SND_JACK_HEADPHONE,
116 .debounce_time = 150,
120 static struct snd_soc_jack tegra_wm8903_mic_jack;
122 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
125 .mask = SND_JACK_MICROPHONE,
129 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
130 struct snd_kcontrol *k, int event)
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);
136 if (!gpio_is_valid(machine->gpio_spkr_en))
139 gpio_set_value_cansleep(machine->gpio_spkr_en,
140 SND_SOC_DAPM_EVENT_ON(event));
145 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
146 struct snd_kcontrol *k, int event)
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);
152 if (!gpio_is_valid(machine->gpio_hp_mute))
155 gpio_set_value_cansleep(machine->gpio_hp_mute,
156 !SND_SOC_DAPM_EVENT_ON(event));
161 static 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),
167 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
168 SOC_DAPM_PIN_SWITCH("Int Spk"),
171 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
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);
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,
188 &tegra_wm8903_hp_jack_gpio);
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,
199 snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
204 static int tegra_wm8903_remove(struct snd_soc_card *card)
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;
210 wm8903_mic_detect(codec, NULL, 0, 0);
215 static struct snd_soc_dai_link tegra_wm8903_dai = {
217 .stream_name = "WM8903 PCM",
218 .codec_dai_name = "wm8903-hifi",
219 .init = tegra_wm8903_init,
220 .ops = &tegra_wm8903_ops,
221 .dai_fmt = SND_SOC_DAIFMT_I2S |
222 SND_SOC_DAIFMT_NB_NF |
223 SND_SOC_DAIFMT_CBS_CFS,
226 static struct snd_soc_card snd_soc_tegra_wm8903 = {
227 .name = "tegra-wm8903",
228 .owner = THIS_MODULE,
229 .dai_link = &tegra_wm8903_dai,
232 .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),
251 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
255 card->dev = &pdev->dev;
256 platform_set_drvdata(pdev, card);
257 snd_soc_card_set_drvdata(card, machine);
259 machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
261 if (machine->gpio_spkr_en == -EPROBE_DEFER)
262 return -EPROBE_DEFER;
263 if (gpio_is_valid(machine->gpio_spkr_en)) {
264 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
265 GPIOF_OUT_INIT_LOW, "spkr_en");
267 dev_err(card->dev, "cannot get spkr_en gpio\n");
272 machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
274 if (machine->gpio_hp_mute == -EPROBE_DEFER)
275 return -EPROBE_DEFER;
276 if (gpio_is_valid(machine->gpio_hp_mute)) {
277 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
278 GPIOF_OUT_INIT_HIGH, "hp_mute");
280 dev_err(card->dev, "cannot get hp_mute gpio\n");
285 machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
286 if (machine->gpio_hp_det == -EPROBE_DEFER)
287 return -EPROBE_DEFER;
289 machine->gpio_int_mic_en = of_get_named_gpio(np,
290 "nvidia,int-mic-en-gpios", 0);
291 if (machine->gpio_int_mic_en == -EPROBE_DEFER)
292 return -EPROBE_DEFER;
293 if (gpio_is_valid(machine->gpio_int_mic_en)) {
294 /* Disable int mic; enable signal is active-high */
295 ret = devm_gpio_request_one(&pdev->dev,
296 machine->gpio_int_mic_en,
297 GPIOF_OUT_INIT_LOW, "int_mic_en");
299 dev_err(card->dev, "cannot get int_mic_en gpio\n");
304 machine->gpio_ext_mic_en = of_get_named_gpio(np,
305 "nvidia,ext-mic-en-gpios", 0);
306 if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
307 return -EPROBE_DEFER;
308 if (gpio_is_valid(machine->gpio_ext_mic_en)) {
309 /* Enable ext mic; enable signal is active-low */
310 ret = devm_gpio_request_one(&pdev->dev,
311 machine->gpio_ext_mic_en,
312 GPIOF_OUT_INIT_LOW, "ext_mic_en");
314 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
319 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
323 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
327 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
328 "nvidia,audio-codec", 0);
329 if (!tegra_wm8903_dai.codec_of_node) {
331 "Property 'nvidia,audio-codec' missing or invalid\n");
336 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
337 "nvidia,i2s-controller", 0);
338 if (!tegra_wm8903_dai.cpu_of_node) {
340 "Property 'nvidia,i2s-controller' missing or invalid\n");
345 tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
347 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
351 ret = snd_soc_register_card(card);
353 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
361 tegra_asoc_utils_fini(&machine->util_data);
366 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
368 struct snd_soc_card *card = platform_get_drvdata(pdev);
369 struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
371 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
372 &tegra_wm8903_hp_jack_gpio);
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);