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250 lines
5.8 KiB
250 lines
5.8 KiB
// 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 <[email protected]> |
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* Updates by Felipe Balbi <[email protected]> |
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* Input by Jari Vanhala <[email protected]> |
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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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