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Based on 1 normalized pattern(s): 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 you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 246 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.674189849@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
250 lines
5.8 KiB
C
250 lines
5.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* twl4030-vibra.c - TWL4030 Vibrator driver
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*
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* Copyright (C) 2008-2010 Nokia Corporation
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*
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* Written by Henrik Saari <henrik.saari@nokia.com>
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* Updates by Felipe Balbi <felipe.balbi@nokia.com>
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* Input by Jari Vanhala <ext-jari.vanhala@nokia.com>
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*/
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#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/workqueue.h>
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#include <linux/mfd/twl.h>
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#include <linux/mfd/twl4030-audio.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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/* MODULE ID2 */
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#define LEDEN 0x00
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/* ForceFeedback */
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#define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
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struct vibra_info {
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struct device *dev;
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struct input_dev *input_dev;
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struct work_struct play_work;
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bool enabled;
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int speed;
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int direction;
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bool coexist;
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};
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static void vibra_disable_leds(void)
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{
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u8 reg;
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/* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
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twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
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reg &= ~0x03;
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twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
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}
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/* Powers H-Bridge and enables audio clk */
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static void vibra_enable(struct vibra_info *info)
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{
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u8 reg;
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twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
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/* turn H-Bridge on */
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twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
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®, TWL4030_REG_VIBRA_CTL);
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twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
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(reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
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twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
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info->enabled = true;
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}
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static void vibra_disable(struct vibra_info *info)
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{
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u8 reg;
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/* Power down H-Bridge */
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twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
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®, TWL4030_REG_VIBRA_CTL);
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twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
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(reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
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twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
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twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
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info->enabled = false;
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}
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static void vibra_play_work(struct work_struct *work)
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{
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struct vibra_info *info = container_of(work,
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struct vibra_info, play_work);
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int dir;
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int pwm;
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u8 reg;
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dir = info->direction;
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pwm = info->speed;
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twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
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®, TWL4030_REG_VIBRA_CTL);
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if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
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if (!info->enabled)
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vibra_enable(info);
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/* set vibra rotation direction */
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twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
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®, TWL4030_REG_VIBRA_CTL);
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reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
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(reg & ~TWL4030_VIBRA_DIR);
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twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
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reg, TWL4030_REG_VIBRA_CTL);
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/* set PWM, 1 = max, 255 = min */
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twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
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256 - pwm, TWL4030_REG_VIBRA_SET);
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} else {
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if (info->enabled)
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vibra_disable(info);
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}
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}
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/*** Input/ForceFeedback ***/
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static int vibra_play(struct input_dev *input, void *data,
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struct ff_effect *effect)
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{
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struct vibra_info *info = input_get_drvdata(input);
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info->speed = effect->u.rumble.strong_magnitude >> 8;
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if (!info->speed)
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info->speed = effect->u.rumble.weak_magnitude >> 9;
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info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
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schedule_work(&info->play_work);
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return 0;
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}
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static void twl4030_vibra_close(struct input_dev *input)
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{
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struct vibra_info *info = input_get_drvdata(input);
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cancel_work_sync(&info->play_work);
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if (info->enabled)
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vibra_disable(info);
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}
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/*** Module ***/
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static int __maybe_unused twl4030_vibra_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct vibra_info *info = platform_get_drvdata(pdev);
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if (info->enabled)
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vibra_disable(info);
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return 0;
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}
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static int __maybe_unused twl4030_vibra_resume(struct device *dev)
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{
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vibra_disable_leds();
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
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twl4030_vibra_suspend, twl4030_vibra_resume);
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static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
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struct device_node *parent)
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{
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struct device_node *node;
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if (pdata && pdata->coexist)
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return true;
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node = of_get_child_by_name(parent, "codec");
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if (node) {
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of_node_put(node);
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return true;
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}
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return false;
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}
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static int twl4030_vibra_probe(struct platform_device *pdev)
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{
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struct twl4030_vibra_data *pdata = dev_get_platdata(&pdev->dev);
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struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
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struct vibra_info *info;
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int ret;
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if (!pdata && !twl4030_core_node) {
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dev_dbg(&pdev->dev, "platform_data not available\n");
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return -EINVAL;
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}
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info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->dev = &pdev->dev;
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info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node);
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INIT_WORK(&info->play_work, vibra_play_work);
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info->input_dev = devm_input_allocate_device(&pdev->dev);
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if (info->input_dev == NULL) {
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dev_err(&pdev->dev, "couldn't allocate input device\n");
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return -ENOMEM;
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}
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input_set_drvdata(info->input_dev, info);
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info->input_dev->name = "twl4030:vibrator";
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info->input_dev->id.version = 1;
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info->input_dev->close = twl4030_vibra_close;
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__set_bit(FF_RUMBLE, info->input_dev->ffbit);
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ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
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if (ret < 0) {
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dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
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return ret;
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}
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ret = input_register_device(info->input_dev);
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if (ret < 0) {
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dev_dbg(&pdev->dev, "couldn't register input device\n");
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goto err_iff;
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}
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vibra_disable_leds();
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platform_set_drvdata(pdev, info);
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return 0;
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err_iff:
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input_ff_destroy(info->input_dev);
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return ret;
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}
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static struct platform_driver twl4030_vibra_driver = {
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.probe = twl4030_vibra_probe,
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.driver = {
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.name = "twl4030-vibra",
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.pm = &twl4030_vibra_pm_ops,
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},
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};
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module_platform_driver(twl4030_vibra_driver);
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MODULE_ALIAS("platform:twl4030-vibra");
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MODULE_DESCRIPTION("TWL4030 Vibra driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Nokia Corporation");
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