+++ /dev/null
-From ae0077658c007643020b88e233150cf1eca6cea8 Mon Sep 17 00:00:00 2001
-From: Peter Malkin <petermalkin@google.com>
-Date: Mon, 27 Mar 2017 16:38:21 -0700
-Subject: [PATCH] Driver support for Google voiceHAT soundcard.
-
-ASoC: googlevoicehat-codec: Use correct device when grabbing GPIO
-
-The fixup for the VoiceHAT in 4.18 incorrectly tried to find the
-sdmode GPIO pin under the card device, not the codec device.
-This failed, and therefore caused the device probe to fail.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
-
-ASoC: googlevoicehat-codec: Reformat for kernel coding standards
-
-Fix all whitespace, indentation, and bracing errors.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
-
-ASoC: googlevoicehat-codec: Make driver function structure const
-
-Make voicehat_component_driver a const structure.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
-
-ASoC: googlevoicehat-codec: Only convert from ms to jiffies once
-
-Minor optimisation and allows to become checkpatch clean.
-A msec value is read out of DT or from a define, and convert once to
-jiffies, rather than every time that it is used.
-
-Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
----
- sound/soc/bcm/googlevoicehat-codec.c | 214 +++++++++++++++++++++++++++
- 1 file changed, 214 insertions(+)
- create mode 100644 sound/soc/bcm/googlevoicehat-codec.c
-
---- /dev/null
-+++ b/sound/soc/bcm/googlevoicehat-codec.c
-@@ -0,0 +1,214 @@
-+/*
-+ * Driver for the Google voiceHAT audio codec for Raspberry Pi.
-+ *
-+ * Author: Peter Malkin <petermalkin@google.com>
-+ * Copyright 2016
-+ *
-+ * 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.
-+ */
-+
-+#include <linux/device.h>
-+#include <linux/err.h>
-+#include <linux/gpio.h>
-+#include <linux/gpio/consumer.h>
-+#include <linux/init.h>
-+#include <linux/kernel.h>
-+#include <linux/mod_devicetable.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+#include <linux/version.h>
-+#include <sound/pcm.h>
-+#include <sound/soc.h>
-+#include <sound/soc-dai.h>
-+#include <sound/soc-dapm.h>
-+
-+#define ICS43432_RATE_MIN_HZ 7190 /* from data sheet */
-+#define ICS43432_RATE_MAX_HZ 52800 /* from data sheet */
-+/* Delay in enabling SDMODE after clock settles to remove pop */
-+#define SDMODE_DELAY_MS 5
-+
-+struct voicehat_priv {
-+ struct delayed_work enable_sdmode_work;
-+ struct gpio_desc *sdmode_gpio;
-+ unsigned long sdmode_delay_jiffies;
-+};
-+
-+static void voicehat_enable_sdmode_work(struct work_struct *work)
-+{
-+ struct voicehat_priv *voicehat = container_of(work,
-+ struct voicehat_priv,
-+ enable_sdmode_work.work);
-+ gpiod_set_value(voicehat->sdmode_gpio, 1);
-+}
-+
-+static int voicehat_component_probe(struct snd_soc_component *component)
-+{
-+ struct voicehat_priv *voicehat =
-+ snd_soc_component_get_drvdata(component);
-+
-+ voicehat->sdmode_gpio = devm_gpiod_get(component->dev, "sdmode",
-+ GPIOD_OUT_LOW);
-+ if (IS_ERR(voicehat->sdmode_gpio)) {
-+ dev_err(component->dev, "Unable to allocate GPIO pin\n");
-+ return PTR_ERR(voicehat->sdmode_gpio);
-+ }
-+
-+ INIT_DELAYED_WORK(&voicehat->enable_sdmode_work,
-+ voicehat_enable_sdmode_work);
-+ return 0;
-+}
-+
-+static void voicehat_component_remove(struct snd_soc_component *component)
-+{
-+ struct voicehat_priv *voicehat =
-+ snd_soc_component_get_drvdata(component);
-+
-+ cancel_delayed_work_sync(&voicehat->enable_sdmode_work);
-+}
-+
-+static const struct snd_soc_dapm_widget voicehat_dapm_widgets[] = {
-+ SND_SOC_DAPM_OUTPUT("Speaker"),
-+};
-+
-+static const struct snd_soc_dapm_route voicehat_dapm_routes[] = {
-+ {"Speaker", NULL, "HiFi Playback"},
-+};
-+
-+static const struct snd_soc_component_driver voicehat_component_driver = {
-+ .probe = voicehat_component_probe,
-+ .remove = voicehat_component_remove,
-+ .dapm_widgets = voicehat_dapm_widgets,
-+ .num_dapm_widgets = ARRAY_SIZE(voicehat_dapm_widgets),
-+ .dapm_routes = voicehat_dapm_routes,
-+ .num_dapm_routes = ARRAY_SIZE(voicehat_dapm_routes),
-+};
-+
-+static int voicehat_daiops_trigger(struct snd_pcm_substream *substream, int cmd,
-+ struct snd_soc_dai *dai)
-+{
-+ struct snd_soc_component *component = dai->component;
-+ struct voicehat_priv *voicehat =
-+ snd_soc_component_get_drvdata(component);
-+
-+ if (voicehat->sdmode_delay_jiffies == 0)
-+ return 0;
-+
-+ dev_dbg(dai->dev, "CMD %d", cmd);
-+ dev_dbg(dai->dev, "Playback Active %d", dai->playback_active);
-+ dev_dbg(dai->dev, "Capture Active %d", dai->capture_active);
-+
-+ switch (cmd) {
-+ case SNDRV_PCM_TRIGGER_START:
-+ case SNDRV_PCM_TRIGGER_RESUME:
-+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-+ if (dai->playback_active) {
-+ dev_info(dai->dev, "Enabling audio amp...\n");
-+ queue_delayed_work(
-+ system_power_efficient_wq,
-+ &voicehat->enable_sdmode_work,
-+ voicehat->sdmode_delay_jiffies);
-+ }
-+ break;
-+ case SNDRV_PCM_TRIGGER_STOP:
-+ case SNDRV_PCM_TRIGGER_SUSPEND:
-+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-+ if (dai->playback_active) {
-+ cancel_delayed_work(&voicehat->enable_sdmode_work);
-+ dev_info(dai->dev, "Disabling audio amp...\n");
-+ gpiod_set_value(voicehat->sdmode_gpio, 0);
-+ }
-+ break;
-+ }
-+ return 0;
-+}
-+
-+static const struct snd_soc_dai_ops voicehat_dai_ops = {
-+ .trigger = voicehat_daiops_trigger,
-+};
-+
-+static struct snd_soc_dai_driver voicehat_dai = {
-+ .name = "voicehat-hifi",
-+ .capture = {
-+ .stream_name = "HiFi Capture",
-+ .channels_min = 2,
-+ .channels_max = 2,
-+ .rates = SNDRV_PCM_RATE_48000,
-+ .formats = SNDRV_PCM_FMTBIT_S32_LE
-+ },
-+ .playback = {
-+ .stream_name = "HiFi Playback",
-+ .channels_min = 2,
-+ .channels_max = 2,
-+ .rates = SNDRV_PCM_RATE_48000,
-+ .formats = SNDRV_PCM_FMTBIT_S32_LE
-+ },
-+ .ops = &voicehat_dai_ops,
-+ .symmetric_rates = 1
-+};
-+
-+#ifdef CONFIG_OF
-+static const struct of_device_id voicehat_ids[] = {
-+ { .compatible = "google,voicehat", }, {}
-+ };
-+ MODULE_DEVICE_TABLE(of, voicehat_ids);
-+#endif
-+
-+static int voicehat_platform_probe(struct platform_device *pdev)
-+{
-+ struct voicehat_priv *voicehat;
-+ unsigned int sdmode_delay;
-+ int ret;
-+
-+ voicehat = devm_kzalloc(&pdev->dev, sizeof(*voicehat), GFP_KERNEL);
-+ if (!voicehat)
-+ return -ENOMEM;
-+
-+ ret = device_property_read_u32(&pdev->dev, "voicehat_sdmode_delay",
-+ &sdmode_delay);
-+
-+ if (ret) {
-+ sdmode_delay = SDMODE_DELAY_MS;
-+ dev_info(&pdev->dev,
-+ "property 'voicehat_sdmode_delay' not found default 5 mS");
-+ } else {
-+ dev_info(&pdev->dev, "property 'voicehat_sdmode_delay' found delay= %d mS",
-+ sdmode_delay);
-+ }
-+ voicehat->sdmode_delay_jiffies = msecs_to_jiffies(sdmode_delay);
-+
-+ dev_set_drvdata(&pdev->dev, voicehat);
-+
-+ return snd_soc_register_component(&pdev->dev,
-+ &voicehat_component_driver,
-+ &voicehat_dai,
-+ 1);
-+}
-+
-+static int voicehat_platform_remove(struct platform_device *pdev)
-+{
-+ snd_soc_unregister_component(&pdev->dev);
-+ return 0;
-+}
-+
-+static struct platform_driver voicehat_driver = {
-+ .driver = {
-+ .name = "voicehat-codec",
-+ .of_match_table = of_match_ptr(voicehat_ids),
-+ },
-+ .probe = voicehat_platform_probe,
-+ .remove = voicehat_platform_remove,
-+};
-+
-+module_platform_driver(voicehat_driver);
-+
-+MODULE_DESCRIPTION("Google voiceHAT Codec driver");
-+MODULE_AUTHOR("Peter Malkin <petermalkin@google.com>");
-+MODULE_LICENSE("GPL v2");
projects / openwrt / staging / dedeckeh.git / blobdiff