diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0076-Driver-support-for-Google-voiceHAT-soundcard.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0076-Driver-support-for-Google-voiceHAT-soundcard.patch | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0076-Driver-support-for-Google-voiceHAT-soundcard.patch b/target/linux/bcm27xx/patches-5.4/950-0076-Driver-support-for-Google-voiceHAT-soundcard.patch new file mode 100644 index 0000000000..ef23a52c91 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0076-Driver-support-for-Google-voiceHAT-soundcard.patch @@ -0,0 +1,254 @@ +From 687f439933392b66432c03929da378ae2f2216db 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"); |