![Stephen Warren](/assets/img/avatar_default.png)
Tegra only supports, and always enables, device tree. Remove all runtime checks for DT support from the driver. This allows removal of the hard-coded Harmony ASoC mapping table, since Harmony only boots with DT now. All board-specific configuration now comes from device tree, so there is no need to have a platform_data structure. Rework the driver to parse the device tree directly into struct tegra_wm8903. Also some slight re-ordering of probe() so that the code more closely resembles other drivers for easier comparison. Inparticular, the GPIO DT parsing and initial programming are moved together for each GPIO. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
403 lines
11 KiB
C
403 lines
11 KiB
C
/*
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* tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
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*
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* Author: Stephen Warren <swarren@nvidia.com>
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* Copyright (C) 2010-2012 - NVIDIA, Inc.
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*
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* Based on code copyright/by:
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*
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* (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
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*
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory
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* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "../codecs/wm8903.h"
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#include "tegra_asoc_utils.h"
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#define DRV_NAME "tegra-snd-wm8903"
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struct tegra_wm8903 {
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int gpio_spkr_en;
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int gpio_hp_det;
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int gpio_hp_mute;
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int gpio_int_mic_en;
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int gpio_ext_mic_en;
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struct tegra_asoc_utils_data util_data;
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};
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static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_codec *codec = codec_dai->codec;
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struct snd_soc_card *card = codec->card;
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struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
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int srate, mclk;
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int err;
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srate = params_rate(params);
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switch (srate) {
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case 64000:
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case 88200:
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case 96000:
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mclk = 128 * srate;
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break;
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default:
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mclk = 256 * srate;
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break;
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}
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/* FIXME: Codec only requires >= 3MHz if OSR==0 */
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while (mclk < 6000000)
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mclk *= 2;
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err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
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if (err < 0) {
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dev_err(card->dev, "Can't configure clocks\n");
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return err;
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}
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err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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SND_SOC_CLOCK_IN);
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if (err < 0) {
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dev_err(card->dev, "codec_dai clock not set\n");
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return err;
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}
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return 0;
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}
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static struct snd_soc_ops tegra_wm8903_ops = {
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.hw_params = tegra_wm8903_hw_params,
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};
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static struct snd_soc_jack tegra_wm8903_hp_jack;
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static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
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{
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.pin = "Headphone Jack",
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.mask = SND_JACK_HEADPHONE,
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},
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};
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static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
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.name = "headphone detect",
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.report = SND_JACK_HEADPHONE,
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.debounce_time = 150,
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.invert = 1,
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};
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static struct snd_soc_jack tegra_wm8903_mic_jack;
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static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
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{
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.pin = "Mic Jack",
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.mask = SND_JACK_MICROPHONE,
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},
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};
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static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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struct snd_soc_dapm_context *dapm = w->dapm;
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struct snd_soc_card *card = dapm->card;
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struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
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if (!gpio_is_valid(machine->gpio_spkr_en))
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return 0;
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gpio_set_value_cansleep(machine->gpio_spkr_en,
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SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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struct snd_soc_dapm_context *dapm = w->dapm;
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struct snd_soc_card *card = dapm->card;
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struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
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if (!gpio_is_valid(machine->gpio_hp_mute))
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return 0;
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gpio_set_value_cansleep(machine->gpio_hp_mute,
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!SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
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SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
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SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
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SND_SOC_DAPM_MIC("Mic Jack", NULL),
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};
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static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
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SOC_DAPM_PIN_SWITCH("Int Spk"),
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};
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static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_codec *codec = codec_dai->codec;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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struct snd_soc_card *card = codec->card;
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struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
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if (gpio_is_valid(machine->gpio_hp_det)) {
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tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
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snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
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&tegra_wm8903_hp_jack);
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snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
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ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
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tegra_wm8903_hp_jack_pins);
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snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
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1,
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&tegra_wm8903_hp_jack_gpio);
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}
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snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
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&tegra_wm8903_mic_jack);
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snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
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ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
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tegra_wm8903_mic_jack_pins);
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wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
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0);
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snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
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return 0;
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}
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static int tegra_wm8903_remove(struct snd_soc_card *card)
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{
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struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_codec *codec = codec_dai->codec;
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wm8903_mic_detect(codec, NULL, 0, 0);
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return 0;
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}
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static struct snd_soc_dai_link tegra_wm8903_dai = {
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.name = "WM8903",
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.stream_name = "WM8903 PCM",
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.codec_dai_name = "wm8903-hifi",
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.init = tegra_wm8903_init,
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.ops = &tegra_wm8903_ops,
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.dai_fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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};
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static struct snd_soc_card snd_soc_tegra_wm8903 = {
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.name = "tegra-wm8903",
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.owner = THIS_MODULE,
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.dai_link = &tegra_wm8903_dai,
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.num_links = 1,
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.remove = tegra_wm8903_remove,
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.controls = tegra_wm8903_controls,
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.num_controls = ARRAY_SIZE(tegra_wm8903_controls),
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.dapm_widgets = tegra_wm8903_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
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.fully_routed = true,
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};
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static int tegra_wm8903_driver_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct snd_soc_card *card = &snd_soc_tegra_wm8903;
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struct tegra_wm8903 *machine;
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int ret;
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machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
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GFP_KERNEL);
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if (!machine) {
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dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
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return -ENOMEM;
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}
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card->dev = &pdev->dev;
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platform_set_drvdata(pdev, card);
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snd_soc_card_set_drvdata(card, machine);
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machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
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0);
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if (machine->gpio_spkr_en == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(machine->gpio_spkr_en)) {
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ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
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GPIOF_OUT_INIT_LOW, "spkr_en");
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if (ret) {
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dev_err(card->dev, "cannot get spkr_en gpio\n");
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return ret;
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}
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}
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machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
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0);
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if (machine->gpio_hp_mute == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(machine->gpio_hp_mute)) {
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ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
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GPIOF_OUT_INIT_HIGH, "hp_mute");
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if (ret) {
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dev_err(card->dev, "cannot get hp_mute gpio\n");
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return ret;
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}
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}
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machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
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if (machine->gpio_hp_det == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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machine->gpio_int_mic_en = of_get_named_gpio(np,
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"nvidia,int-mic-en-gpios", 0);
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if (machine->gpio_int_mic_en == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(machine->gpio_int_mic_en)) {
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/* Disable int mic; enable signal is active-high */
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ret = devm_gpio_request_one(&pdev->dev,
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machine->gpio_int_mic_en,
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GPIOF_OUT_INIT_LOW, "int_mic_en");
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if (ret) {
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dev_err(card->dev, "cannot get int_mic_en gpio\n");
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return ret;
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}
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}
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machine->gpio_ext_mic_en = of_get_named_gpio(np,
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"nvidia,ext-mic-en-gpios", 0);
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if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(machine->gpio_ext_mic_en)) {
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/* Enable ext mic; enable signal is active-low */
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ret = devm_gpio_request_one(&pdev->dev,
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machine->gpio_ext_mic_en,
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GPIOF_OUT_INIT_LOW, "ext_mic_en");
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if (ret) {
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dev_err(card->dev, "cannot get ext_mic_en gpio\n");
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return ret;
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}
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}
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ret = snd_soc_of_parse_card_name(card, "nvidia,model");
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if (ret)
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goto err;
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ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
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if (ret)
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goto err;
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tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
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"nvidia,audio-codec", 0);
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if (!tegra_wm8903_dai.codec_of_node) {
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dev_err(&pdev->dev,
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"Property 'nvidia,audio-codec' missing or invalid\n");
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ret = -EINVAL;
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goto err;
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}
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tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
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"nvidia,i2s-controller", 0);
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if (!tegra_wm8903_dai.cpu_of_node) {
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dev_err(&pdev->dev,
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"Property 'nvidia,i2s-controller' missing or invalid\n");
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ret = -EINVAL;
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goto err;
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}
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tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
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ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
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if (ret)
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goto err;
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
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ret);
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goto err_fini_utils;
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}
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return 0;
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err_fini_utils:
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tegra_asoc_utils_fini(&machine->util_data);
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err:
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return ret;
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}
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static int tegra_wm8903_driver_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
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snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
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&tegra_wm8903_hp_jack_gpio);
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snd_soc_unregister_card(card);
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tegra_asoc_utils_fini(&machine->util_data);
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return 0;
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}
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static const struct of_device_id tegra_wm8903_of_match[] = {
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{ .compatible = "nvidia,tegra-audio-wm8903", },
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{},
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};
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static struct platform_driver tegra_wm8903_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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.pm = &snd_soc_pm_ops,
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.of_match_table = tegra_wm8903_of_match,
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},
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.probe = tegra_wm8903_driver_probe,
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.remove = tegra_wm8903_driver_remove,
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};
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module_platform_driver(tegra_wm8903_driver);
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MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
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MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
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