diff options
Diffstat (limited to 'sound/soc/pxa/hx4700.c')
| -rw-r--r-- | sound/soc/pxa/hx4700.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/sound/soc/pxa/hx4700.c b/sound/soc/pxa/hx4700.c new file mode 100644 index 000000000..a323ddb8f --- /dev/null +++ b/sound/soc/pxa/hx4700.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SoC audio for HP iPAQ hx4700 + * + * Copyright (c) 2009 Philipp Zabel + */ + +#include <linux/module.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> + +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include <asm/mach-types.h> +#include "pxa2xx-i2s.h" + +static struct gpio_desc *gpiod_hp_driver, *gpiod_spk_sd; +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, + .invert = 1, + }, + { + .pin = "Speaker", + /* disable speaker when hp jack is inserted */ + .mask = SND_JACK_HEADPHONE, + }, +}; + +/* Headphones jack detection GPIO */ +static struct snd_soc_jack_gpio hs_jack_gpio = { + .name = "earphone-det", + .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 = asoc_substream_to_rtd(substream); + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + 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 const 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) +{ + gpiod_set_value(gpiod_spk_sd, !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) +{ + gpiod_set_value(gpiod_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) +{ + int err; + + /* Jack detection API stuff */ + err = snd_soc_card_jack_new_pins(rtd->card, "Headphone Jack", + SND_JACK_HEADPHONE, &hs_jack, + hs_jack_pin, ARRAY_SIZE(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 */ +SND_SOC_DAILINK_DEFS(ak4641, + DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")), + DAILINK_COMP_ARRAY(COMP_CODEC("ak4641.0-0012", "ak4641-hifi")), + DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio"))); + +static struct snd_soc_dai_link hx4700_dai = { + .name = "ak4641", + .stream_name = "AK4641", + .init = hx4700_ak4641_init, + .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &hx4700_ops, + SND_SOC_DAILINK_REG(ak4641), +}; + +/* 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), + .fully_routed = true, +}; + +static int hx4700_audio_probe(struct platform_device *pdev) +{ + int ret; + + if (!machine_is_h4700()) + return -ENODEV; + + gpiod_hp_driver = devm_gpiod_get(&pdev->dev, "hp-driver", GPIOD_ASIS); + ret = PTR_ERR_OR_ZERO(gpiod_hp_driver); + if (ret) + return ret; + gpiod_spk_sd = devm_gpiod_get(&pdev->dev, "spk-sd", GPIOD_ASIS); + ret = PTR_ERR_OR_ZERO(gpiod_spk_sd); + if (ret) + return ret; + + hs_jack_gpio.gpiod_dev = &pdev->dev; + snd_soc_card_hx4700.dev = &pdev->dev; + ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700); + + return ret; +} + +static int hx4700_audio_remove(struct platform_device *pdev) +{ + gpiod_set_value(gpiod_hp_driver, 0); + gpiod_set_value(gpiod_spk_sd, 0); + return 0; +} + +static struct platform_driver hx4700_audio_driver = { + .driver = { + .name = "hx4700-audio", + .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"); |