256 lines
6.2 KiB
C
256 lines
6.2 KiB
C
/*
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* SoC audio for HP iPAQ hx4700
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*
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* Copyright (c) 2009 Philipp Zabel
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/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 <mach/hx4700.h>
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#include <asm/mach-types.h>
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#include "pxa2xx-i2s.h"
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#include "../codecs/ak4641.h"
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static struct snd_soc_jack hs_jack;
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/* Headphones jack detection DAPM pin */
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static struct snd_soc_jack_pin hs_jack_pin[] = {
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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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.pin = "Speaker",
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/* disable speaker when hp jack is inserted */
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.mask = SND_JACK_HEADPHONE,
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.invert = 1,
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},
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};
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/* Headphones jack detection GPIO */
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static struct snd_soc_jack_gpio hs_jack_gpio = {
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.gpio = GPIO75_HX4700_EARPHONE_nDET,
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.invert = true,
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.name = "hp-gpio",
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.report = SND_JACK_HEADPHONE,
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.debounce_time = 200,
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};
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/*
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* iPAQ hx4700 uses I2S for capture and playback.
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*/
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static int hx4700_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_dai *cpu_dai = rtd->cpu_dai;
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int ret = 0;
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai,
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SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai,
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SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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/* set the I2S system clock as output */
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
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SND_SOC_CLOCK_OUT);
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if (ret < 0)
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return ret;
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/* inform codec driver about clock freq *
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* (PXA I2S always uses divider 256) */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct snd_soc_ops hx4700_ops = {
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.hw_params = hx4700_hw_params,
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};
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static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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/* hx4700 machine dapm widgets */
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static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
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SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
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SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
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};
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/* hx4700 machine audio_map */
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static const struct snd_soc_dapm_route hx4700_audio_map[] = {
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/* Headphone connected to LOUT, ROUT */
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{"Headphone Jack", NULL, "LOUT"},
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{"Headphone Jack", NULL, "ROUT"},
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/* Speaker connected to MOUT2 */
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{"Speaker", NULL, "MOUT2"},
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/* Microphone connected to MICIN */
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{"MICIN", NULL, "Built-in Microphone"},
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{"AIN", NULL, "MICOUT"},
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};
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/*
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* Logic for a ak4641 as connected on a HP iPAQ hx4700
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*/
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static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_codec *codec = rtd->codec;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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int err;
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/* NC codec pins */
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/* FIXME: is anything connected here? */
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snd_soc_dapm_nc_pin(dapm, "MOUT1");
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snd_soc_dapm_nc_pin(dapm, "MICEXT");
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snd_soc_dapm_nc_pin(dapm, "AUX");
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/* Jack detection API stuff */
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err = snd_soc_jack_new(codec, "Headphone Jack",
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SND_JACK_HEADPHONE, &hs_jack);
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if (err)
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return err;
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err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
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hs_jack_pin);
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if (err)
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return err;
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err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
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return err;
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}
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/* hx4700 digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link hx4700_dai = {
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.name = "ak4641",
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.stream_name = "AK4641",
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.cpu_dai_name = "pxa2xx-i2s",
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.codec_dai_name = "ak4641-hifi",
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.platform_name = "pxa-pcm-audio",
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.codec_name = "ak4641.0-0012",
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.init = hx4700_ak4641_init,
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.ops = &hx4700_ops,
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};
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/* hx4700 audio machine driver */
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static struct snd_soc_card snd_soc_card_hx4700 = {
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.name = "iPAQ hx4700",
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.dai_link = &hx4700_dai,
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.num_links = 1,
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.dapm_widgets = hx4700_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
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.dapm_routes = hx4700_audio_map,
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.num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
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};
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static struct gpio hx4700_audio_gpios[] = {
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{ GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
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{ GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
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};
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static int __devinit hx4700_audio_probe(struct platform_device *pdev)
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{
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int ret;
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if (!machine_is_h4700())
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return -ENODEV;
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ret = gpio_request_array(hx4700_audio_gpios,
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ARRAY_SIZE(hx4700_audio_gpios));
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if (ret)
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return ret;
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snd_soc_card_hx4700.dev = &pdev->dev;
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ret = snd_soc_register_card(&snd_soc_card_hx4700);
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if (ret)
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return ret;
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return 0;
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}
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static int __devexit hx4700_audio_remove(struct platform_device *pdev)
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{
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snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
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snd_soc_unregister_card(&snd_soc_card_hx4700);
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gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
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gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
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gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
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return 0;
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}
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static struct platform_driver hx4700_audio_driver = {
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.driver = {
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.name = "hx4700-audio",
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.owner = THIS_MODULE,
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.pm = &snd_soc_pm_ops,
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},
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.probe = hx4700_audio_probe,
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.remove = __devexit_p(hx4700_audio_remove),
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};
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static int __init hx4700_modinit(void)
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{
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return platform_driver_register(&hx4700_audio_driver);
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}
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module_init(hx4700_modinit);
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static void __exit hx4700_modexit(void)
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{
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platform_driver_unregister(&hx4700_audio_driver);
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}
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module_exit(hx4700_modexit);
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MODULE_AUTHOR("Philipp Zabel");
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MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:hx4700-audio");
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