mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-09 15:26:40 +07:00
d797da41b2
Pull input subsystem updates from Dmitry Torokhov: "Two new drivers for Elan hardware (for I2C touchpad and touchscreen found in several Chromebooks and other devices), a driver for Goodix touch panel, and small fixes to Cypress I2C trackpad and other input drivers. Also we switched to use __maybe_unused instead of gating suspend/ resume code with #ifdef guards to get better compile coverage" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (27 commits) Input: gpio_keys - fix warning regarding uninitialized 'button' variable Input: add support for Elan eKTH I2C touchscreens Input: gpio_keys - fix warning regarding uninitialized 'irq' variable Input: cyapa - use 'error' for error codes Input: cyapa - fix resuming the device Input: gpio_keys - add device tree support for interrupt only keys Input: amikbd - allocate temporary keymap buffer on the stack Input: amikbd - fix build if !CONFIG_HW_CONSOLE Input: lm8323 - missing error check in lm8323_set_disable() Input: initialize device counter variables with -1 Input: initialize input_no to -1 to avoid subtraction Input: i8042 - do not try to load on Intel NUC D54250WYK Input: atkbd - correct MSC_SCAN events for force_release keys Input: cyapa - switch to using managed resources Input: lifebook - use "static inline" instead of "inline" in lifebook.h Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume Input: mouse - use __maybe_unused instead of ifdef around suspend/resume Input: misc - use __maybe_unused instead of ifdef around suspend/resume Input: cap11xx - support for irq-active-high option Input: cap11xx - add support for various cap11xx devices ...
235 lines
5.6 KiB
C
235 lines
5.6 KiB
C
/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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#define VIB_DRV 0x4A
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#define VIB_DRV_SEL_MASK 0xf8
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#define VIB_DRV_SEL_SHIFT 0x03
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#define VIB_DRV_EN_MANUAL_MASK 0xfc
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#define VIB_MAX_LEVEL_mV (3100)
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#define VIB_MIN_LEVEL_mV (1200)
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#define VIB_MAX_LEVELS (VIB_MAX_LEVEL_mV - VIB_MIN_LEVEL_mV)
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#define MAX_FF_SPEED 0xff
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/**
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* struct pm8xxx_vib - structure to hold vibrator data
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* @vib_input_dev: input device supporting force feedback
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* @work: work structure to set the vibration parameters
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* @regmap: regmap for register read/write
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* @speed: speed of vibration set from userland
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* @active: state of vibrator
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* @level: level of vibration to set in the chip
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* @reg_vib_drv: VIB_DRV register value
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*/
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struct pm8xxx_vib {
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struct input_dev *vib_input_dev;
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struct work_struct work;
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struct regmap *regmap;
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int speed;
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int level;
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bool active;
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u8 reg_vib_drv;
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};
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/**
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* pm8xxx_vib_set - handler to start/stop vibration
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* @vib: pointer to vibrator structure
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* @on: state to set
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*/
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static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
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{
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int rc;
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unsigned int val = vib->reg_vib_drv;
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if (on)
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val |= ((vib->level << VIB_DRV_SEL_SHIFT) & VIB_DRV_SEL_MASK);
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else
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val &= ~VIB_DRV_SEL_MASK;
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rc = regmap_write(vib->regmap, VIB_DRV, val);
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if (rc < 0)
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return rc;
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vib->reg_vib_drv = val;
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return 0;
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}
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/**
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* pm8xxx_work_handler - worker to set vibration level
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* @work: pointer to work_struct
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*/
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static void pm8xxx_work_handler(struct work_struct *work)
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{
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struct pm8xxx_vib *vib = container_of(work, struct pm8xxx_vib, work);
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int rc;
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unsigned int val;
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rc = regmap_read(vib->regmap, VIB_DRV, &val);
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if (rc < 0)
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return;
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/*
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* pmic vibrator supports voltage ranges from 1.2 to 3.1V, so
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* scale the level to fit into these ranges.
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*/
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if (vib->speed) {
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vib->active = true;
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vib->level = ((VIB_MAX_LEVELS * vib->speed) / MAX_FF_SPEED) +
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VIB_MIN_LEVEL_mV;
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vib->level /= 100;
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} else {
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vib->active = false;
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vib->level = VIB_MIN_LEVEL_mV / 100;
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}
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pm8xxx_vib_set(vib, vib->active);
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}
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/**
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* pm8xxx_vib_close - callback of input close callback
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* @dev: input device pointer
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*
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* Turns off the vibrator.
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*/
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static void pm8xxx_vib_close(struct input_dev *dev)
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{
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struct pm8xxx_vib *vib = input_get_drvdata(dev);
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cancel_work_sync(&vib->work);
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if (vib->active)
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pm8xxx_vib_set(vib, false);
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}
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/**
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* pm8xxx_vib_play_effect - function to handle vib effects.
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* @dev: input device pointer
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* @data: data of effect
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* @effect: effect to play
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*
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* Currently this driver supports only rumble effects.
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*/
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static int pm8xxx_vib_play_effect(struct input_dev *dev, void *data,
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struct ff_effect *effect)
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{
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struct pm8xxx_vib *vib = input_get_drvdata(dev);
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vib->speed = effect->u.rumble.strong_magnitude >> 8;
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if (!vib->speed)
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vib->speed = effect->u.rumble.weak_magnitude >> 9;
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schedule_work(&vib->work);
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return 0;
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}
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static int pm8xxx_vib_probe(struct platform_device *pdev)
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{
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struct pm8xxx_vib *vib;
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struct input_dev *input_dev;
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int error;
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unsigned int val;
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vib = devm_kzalloc(&pdev->dev, sizeof(*vib), GFP_KERNEL);
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if (!vib)
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return -ENOMEM;
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vib->regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (!vib->regmap)
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return -ENODEV;
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input_dev = devm_input_allocate_device(&pdev->dev);
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if (!input_dev)
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return -ENOMEM;
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INIT_WORK(&vib->work, pm8xxx_work_handler);
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vib->vib_input_dev = input_dev;
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/* operate in manual mode */
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error = regmap_read(vib->regmap, VIB_DRV, &val);
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if (error < 0)
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return error;
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val &= ~VIB_DRV_EN_MANUAL_MASK;
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error = regmap_write(vib->regmap, VIB_DRV, val);
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if (error < 0)
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return error;
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vib->reg_vib_drv = val;
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input_dev->name = "pm8xxx_vib_ffmemless";
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input_dev->id.version = 1;
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input_dev->close = pm8xxx_vib_close;
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input_set_drvdata(input_dev, vib);
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input_set_capability(vib->vib_input_dev, EV_FF, FF_RUMBLE);
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error = input_ff_create_memless(input_dev, NULL,
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pm8xxx_vib_play_effect);
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if (error) {
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dev_err(&pdev->dev,
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"couldn't register vibrator as FF device\n");
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return error;
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}
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error = input_register_device(input_dev);
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if (error) {
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dev_err(&pdev->dev, "couldn't register input device\n");
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return error;
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}
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platform_set_drvdata(pdev, vib);
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return 0;
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}
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static int __maybe_unused pm8xxx_vib_suspend(struct device *dev)
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{
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struct pm8xxx_vib *vib = dev_get_drvdata(dev);
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/* Turn off the vibrator */
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pm8xxx_vib_set(vib, false);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(pm8xxx_vib_pm_ops, pm8xxx_vib_suspend, NULL);
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static const struct of_device_id pm8xxx_vib_id_table[] = {
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{ .compatible = "qcom,pm8058-vib" },
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{ .compatible = "qcom,pm8921-vib" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);
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static struct platform_driver pm8xxx_vib_driver = {
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.probe = pm8xxx_vib_probe,
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.driver = {
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.name = "pm8xxx-vib",
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.pm = &pm8xxx_vib_pm_ops,
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.of_match_table = pm8xxx_vib_id_table,
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},
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};
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module_platform_driver(pm8xxx_vib_driver);
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MODULE_ALIAS("platform:pm8xxx_vib");
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MODULE_DESCRIPTION("PMIC8xxx vibrator driver based on ff-memless framework");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Amy Maloche <amaloche@codeaurora.org>");
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