2011-05-18 23:25:10 +08:00
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/*
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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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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 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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int err;
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/* Jack detection API stuff */
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2015-03-04 17:33:29 +08:00
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err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
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SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
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ARRAY_SIZE(hs_jack_pin));
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2011-05-18 23:25:10 +08:00
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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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2014-06-03 18:31:46 +08:00
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static int hx4700_card_remove(struct snd_soc_card *card)
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ASoC: free jack GPIOs before the sound card is freed
This is the same change as commit fb6b8e71448a "ASoC: tegra: free jack
GPIOs before the sound card is freed", but applied to all other ASoC
machine drivers where code inspection indicates the same problem exists.
That commit's description is:
==========
snd_soc_jack_add_gpios() schedules a work queue item to poll the GPIO to
generate an initial jack status report. If sound card initialization
fails, that work item needs to be cancelled, so it doesn't run after the
card has been freed. Specifically, freeing the card calls
snd_jack_dev_free() which calls snd_jack_dev_disconnect() which sets
jack->input_dev = NULL, and input_dev is used by snd_jack_report(), which
is called from the work queue item.
snd_soc_jack_free_gpios() cancels the work item. The Tegra ASoC machine
drivers do call this function in the platform driver remove() callback.
However, this happens after the sound card is freed, at least when the
card is freed due to errors late during snd_soc_instantiate_card(). This
leaves a window where the work item can execute after the card is freed.
In next-20140522, sound card initialization does fail for unrelated
reasons, and hits the problem described above.
To solve this, fix the Tegra ASoC machine drivers to clean up the Jack
GPIOs during the snd_soc_card's .remove() callback, which is executed
before the overall card object is freed. also, guard the cleanup call
based on whether we actually setup up the GPIOs in the first place.
Ideally, we'd do the cleanup in a struct snd_soc_dai_link .fini/remove
function to match where the GPIOs get set up. However, there is no such
callback.
==========
Note that I have not even compile-tested this in most cases, since most
of the drivers rely on specific mach-* support I don't have enabled, and
don't support COMPILE_TEST. Testing by the relevant board maintainers
would be useful.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-31 02:42:57 +08:00
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{
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snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
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return 0;
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}
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2011-05-18 23:25:10 +08:00
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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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2011-12-20 16:13:26 +08:00
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.dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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2011-05-18 23:25:10 +08:00
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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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2011-12-22 09:44:43 +08:00
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.owner = THIS_MODULE,
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ASoC: free jack GPIOs before the sound card is freed
This is the same change as commit fb6b8e71448a "ASoC: tegra: free jack
GPIOs before the sound card is freed", but applied to all other ASoC
machine drivers where code inspection indicates the same problem exists.
That commit's description is:
==========
snd_soc_jack_add_gpios() schedules a work queue item to poll the GPIO to
generate an initial jack status report. If sound card initialization
fails, that work item needs to be cancelled, so it doesn't run after the
card has been freed. Specifically, freeing the card calls
snd_jack_dev_free() which calls snd_jack_dev_disconnect() which sets
jack->input_dev = NULL, and input_dev is used by snd_jack_report(), which
is called from the work queue item.
snd_soc_jack_free_gpios() cancels the work item. The Tegra ASoC machine
drivers do call this function in the platform driver remove() callback.
However, this happens after the sound card is freed, at least when the
card is freed due to errors late during snd_soc_instantiate_card(). This
leaves a window where the work item can execute after the card is freed.
In next-20140522, sound card initialization does fail for unrelated
reasons, and hits the problem described above.
To solve this, fix the Tegra ASoC machine drivers to clean up the Jack
GPIOs during the snd_soc_card's .remove() callback, which is executed
before the overall card object is freed. also, guard the cleanup call
based on whether we actually setup up the GPIOs in the first place.
Ideally, we'd do the cleanup in a struct snd_soc_dai_link .fini/remove
function to match where the GPIOs get set up. However, there is no such
callback.
==========
Note that I have not even compile-tested this in most cases, since most
of the drivers rely on specific mach-* support I don't have enabled, and
don't support COMPILE_TEST. Testing by the relevant board maintainers
would be useful.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-31 02:42:57 +08:00
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.remove = hx4700_card_remove,
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2011-05-18 23:25:10 +08:00
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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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2015-01-10 05:03:29 +08:00
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.fully_routed = true,
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2011-05-18 23:25:10 +08:00
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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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2012-12-07 22:26:14 +08:00
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static int hx4700_audio_probe(struct platform_device *pdev)
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2011-05-18 23:25:10 +08:00
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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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2015-09-01 10:32:59 +08:00
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ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
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2011-05-18 23:25:10 +08:00
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if (ret)
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2011-12-12 11:26:00 +08:00
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gpio_free_array(hx4700_audio_gpios,
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ARRAY_SIZE(hx4700_audio_gpios));
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2011-05-18 23:25:10 +08:00
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2011-12-12 11:26:00 +08:00
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return ret;
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2011-05-18 23:25:10 +08:00
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}
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2012-12-07 22:26:14 +08:00
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static int hx4700_audio_remove(struct platform_device *pdev)
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2011-05-18 23:25:10 +08:00
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{
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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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.pm = &snd_soc_pm_ops,
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},
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.probe = hx4700_audio_probe,
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2012-12-07 22:26:14 +08:00
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.remove = hx4700_audio_remove,
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2011-05-18 23:25:10 +08:00
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};
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2011-11-25 10:13:37 +08:00
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module_platform_driver(hx4700_audio_driver);
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2011-05-18 23:25:10 +08:00
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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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