diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/input/misc/arizona-haptics.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/drivers/input/misc/arizona-haptics.c b/drivers/input/misc/arizona-haptics.c new file mode 100644 index 0000000000..5fa1c9438a --- /dev/null +++ b/drivers/input/misc/arizona-haptics.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Arizona haptics driver + * + * Copyright 2012 Wolfson Microelectronics plc + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/slab.h> + +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#include <linux/mfd/arizona/core.h> +#include <linux/mfd/arizona/pdata.h> +#include <linux/mfd/arizona/registers.h> + +struct arizona_haptics { + struct arizona *arizona; + struct input_dev *input_dev; + struct work_struct work; + + struct mutex mutex; + u8 intensity; +}; + +static void arizona_haptics_work(struct work_struct *work) +{ + struct arizona_haptics *haptics = container_of(work, + struct arizona_haptics, + work); + struct arizona *arizona = haptics->arizona; + struct snd_soc_component *component = + snd_soc_dapm_to_component(arizona->dapm); + int ret; + + if (!haptics->arizona->dapm) { + dev_err(arizona->dev, "No DAPM context\n"); + return; + } + + if (haptics->intensity) { + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HAPTICS_PHASE_2_INTENSITY, + ARIZONA_PHASE2_INTENSITY_MASK, + haptics->intensity); + if (ret != 0) { + dev_err(arizona->dev, "Failed to set intensity: %d\n", + ret); + return; + } + + /* This enable sequence will be a noop if already enabled */ + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HAPTICS_CONTROL_1, + ARIZONA_HAP_CTRL_MASK, + 1 << ARIZONA_HAP_CTRL_SHIFT); + if (ret != 0) { + dev_err(arizona->dev, "Failed to start haptics: %d\n", + ret); + return; + } + + ret = snd_soc_component_enable_pin(component, "HAPTICS"); + if (ret != 0) { + dev_err(arizona->dev, "Failed to start HAPTICS: %d\n", + ret); + return; + } + + ret = snd_soc_dapm_sync(arizona->dapm); + if (ret != 0) { + dev_err(arizona->dev, "Failed to sync DAPM: %d\n", + ret); + return; + } + } else { + /* This disable sequence will be a noop if already enabled */ + ret = snd_soc_component_disable_pin(component, "HAPTICS"); + if (ret != 0) { + dev_err(arizona->dev, "Failed to disable HAPTICS: %d\n", + ret); + return; + } + + ret = snd_soc_dapm_sync(arizona->dapm); + if (ret != 0) { + dev_err(arizona->dev, "Failed to sync DAPM: %d\n", + ret); + return; + } + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HAPTICS_CONTROL_1, + ARIZONA_HAP_CTRL_MASK, 0); + if (ret != 0) { + dev_err(arizona->dev, "Failed to stop haptics: %d\n", + ret); + return; + } + } +} + +static int arizona_haptics_play(struct input_dev *input, void *data, + struct ff_effect *effect) +{ + struct arizona_haptics *haptics = input_get_drvdata(input); + struct arizona *arizona = haptics->arizona; + + if (!arizona->dapm) { + dev_err(arizona->dev, "No DAPM context\n"); + return -EBUSY; + } + + if (effect->u.rumble.strong_magnitude) { + /* Scale the magnitude into the range the device supports */ + if (arizona->pdata.hap_act) { + haptics->intensity = + effect->u.rumble.strong_magnitude >> 9; + if (effect->direction < 0x8000) + haptics->intensity += 0x7f; + } else { + haptics->intensity = + effect->u.rumble.strong_magnitude >> 8; + } + } else { + haptics->intensity = 0; + } + + schedule_work(&haptics->work); + + return 0; +} + +static void arizona_haptics_close(struct input_dev *input) +{ + struct arizona_haptics *haptics = input_get_drvdata(input); + struct snd_soc_component *component; + + cancel_work_sync(&haptics->work); + + if (haptics->arizona->dapm) { + component = snd_soc_dapm_to_component(haptics->arizona->dapm); + snd_soc_component_disable_pin(component, "HAPTICS"); + } +} + +static int arizona_haptics_probe(struct platform_device *pdev) +{ + struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); + struct arizona_haptics *haptics; + int ret; + + haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL); + if (!haptics) + return -ENOMEM; + + haptics->arizona = arizona; + + ret = regmap_update_bits(arizona->regmap, ARIZONA_HAPTICS_CONTROL_1, + ARIZONA_HAP_ACT, arizona->pdata.hap_act); + if (ret != 0) { + dev_err(arizona->dev, "Failed to set haptics actuator: %d\n", + ret); + return ret; + } + + INIT_WORK(&haptics->work, arizona_haptics_work); + + haptics->input_dev = devm_input_allocate_device(&pdev->dev); + if (!haptics->input_dev) { + dev_err(arizona->dev, "Failed to allocate input device\n"); + return -ENOMEM; + } + + input_set_drvdata(haptics->input_dev, haptics); + + haptics->input_dev->name = "arizona:haptics"; + haptics->input_dev->close = arizona_haptics_close; + __set_bit(FF_RUMBLE, haptics->input_dev->ffbit); + + ret = input_ff_create_memless(haptics->input_dev, NULL, + arizona_haptics_play); + if (ret < 0) { + dev_err(arizona->dev, "input_ff_create_memless() failed: %d\n", + ret); + return ret; + } + + ret = input_register_device(haptics->input_dev); + if (ret < 0) { + dev_err(arizona->dev, "couldn't register input device: %d\n", + ret); + return ret; + } + + return 0; +} + +static struct platform_driver arizona_haptics_driver = { + .probe = arizona_haptics_probe, + .driver = { + .name = "arizona-haptics", + }, +}; +module_platform_driver(arizona_haptics_driver); + +MODULE_ALIAS("platform:arizona-haptics"); +MODULE_DESCRIPTION("Arizona haptics driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |