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