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