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Release 4.11 drivers/input/misc/twl4030-vibra.c

/*
 * twl4030-vibra.c - TWL4030 Vibrator driver
 *
 * Copyright (C) 2008-2010 Nokia Corporation
 *
 * Written by Henrik Saari <henrik.saari@nokia.com>
 * Updates by Felipe Balbi <felipe.balbi@nokia.com>
 * Input by Jari Vanhala <ext-jari.vanhala@nokia.com>
 *
 * 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
 *
 */

#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/workqueue.h>
#include <linux/i2c/twl.h>
#include <linux/mfd/twl4030-audio.h>
#include <linux/input.h>
#include <linux/slab.h>

/* MODULE ID2 */

#define LEDEN		0x00

/* ForceFeedback */

#define EFFECT_DIR_180_DEG	0x8000 
/* range is 0 - 0xFFFF */


struct vibra_info {
	
struct device		*dev;
	
struct input_dev	*input_dev;

	
struct work_struct	play_work;

	
bool			enabled;
	
int			speed;
	
int			direction;

	
bool			coexist;
};


static void vibra_disable_leds(void) { u8 reg; /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */ twl_i2c_read_u8(TWL4030_MODULE_LED, &reg, LEDEN); reg &= ~0x03; twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg); }

Contributors

PersonTokensPropCommitsCommitProp
Jari Vanhala36100.00%1100.00%
Total36100.00%1100.00%

/* Powers H-Bridge and enables audio clk */
static void vibra_enable(struct vibra_info *info) { u8 reg; twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER); /* turn H-Bridge on */ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &reg, TWL4030_REG_VIBRA_CTL); twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL); twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL); info->enabled = true; }

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PersonTokensPropCommitsCommitProp
Jari Vanhala5092.59%150.00%
Peter Ujfalusi47.41%150.00%
Total54100.00%2100.00%


static void vibra_disable(struct vibra_info *info) { u8 reg; /* Power down H-Bridge */ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &reg, TWL4030_REG_VIBRA_CTL); twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL); twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL); twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER); info->enabled = false; }

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PersonTokensPropCommitsCommitProp
Jari Vanhala5192.73%150.00%
Peter Ujfalusi47.27%150.00%
Total55100.00%2100.00%


static void vibra_play_work(struct work_struct *work) { struct vibra_info *info = container_of(work, struct vibra_info, play_work); int dir; int pwm; u8 reg; dir = info->direction; pwm = info->speed; twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &reg, TWL4030_REG_VIBRA_CTL); if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) { if (!info->enabled) vibra_enable(info); /* set vibra rotation direction */ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &reg, TWL4030_REG_VIBRA_CTL); reg = (dir) ? (reg | TWL4030_VIBRA_DIR) : (reg & ~TWL4030_VIBRA_DIR); twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, reg, TWL4030_REG_VIBRA_CTL); /* set PWM, 1 = max, 255 = min */ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, 256 - pwm, TWL4030_REG_VIBRA_SET); } else { if (info->enabled) vibra_disable(info); } }

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PersonTokensPropCommitsCommitProp
Jari Vanhala154100.00%1100.00%
Total154100.00%1100.00%

/*** Input/ForceFeedback ***/
static int vibra_play(struct input_dev *input, void *data, struct ff_effect *effect) { struct vibra_info *info = input_get_drvdata(input); info->speed = effect->u.rumble.strong_magnitude >> 8; if (!info->speed) info->speed = effect->u.rumble.weak_magnitude >> 9; info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1; schedule_work(&info->play_work); return 0; }

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PersonTokensPropCommitsCommitProp
Jari Vanhala8998.89%150.00%
Peter Ujfalusi11.11%150.00%
Total90100.00%2100.00%


static void twl4030_vibra_close(struct input_dev *input) { struct vibra_info *info = input_get_drvdata(input); cancel_work_sync(&info->play_work); if (info->enabled) vibra_disable(info); }

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PersonTokensPropCommitsCommitProp
Jari Vanhala40100.00%1100.00%
Total40100.00%1100.00%

/*** Module ***/
static int __maybe_unused twl4030_vibra_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct vibra_info *info = platform_get_drvdata(pdev); if (info->enabled) vibra_disable(info); return 0; }

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PersonTokensPropCommitsCommitProp
Jari Vanhala4597.83%150.00%
Jingoo Han12.17%150.00%
Total46100.00%2100.00%


static int __maybe_unused twl4030_vibra_resume(struct device *dev) { vibra_disable_leds(); return 0; }

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PersonTokensPropCommitsCommitProp
Jari Vanhala1794.44%150.00%
Jingoo Han15.56%150.00%
Total18100.00%2100.00%

static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops, twl4030_vibra_suspend, twl4030_vibra_resume);
static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata, struct device_node *node) { if (pdata && pdata->coexist) return true; node = of_find_node_by_name(node, "codec"); if (node) { of_node_put(node); return true; } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Peter Ujfalusi4075.47%133.33%
Libo Chen713.21%133.33%
Marek Belisko611.32%133.33%
Total53100.00%3100.00%


static int twl4030_vibra_probe(struct platform_device *pdev) { struct twl4030_vibra_data *pdata = dev_get_platdata(&pdev->dev); struct device_node *twl4030_core_node = pdev->dev.parent->of_node; struct vibra_info *info; int ret; if (!pdata && !twl4030_core_node) { dev_dbg(&pdev->dev, "platform_data not available\n"); return -EINVAL; } info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->dev = &pdev->dev; info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node); INIT_WORK(&info->play_work, vibra_play_work); info->input_dev = devm_input_allocate_device(&pdev->dev); if (info->input_dev == NULL) { dev_err(&pdev->dev, "couldn't allocate input device\n"); return -ENOMEM; } input_set_drvdata(info->input_dev, info); info->input_dev->name = "twl4030:vibrator"; info->input_dev->id.version = 1; info->input_dev->close = twl4030_vibra_close; __set_bit(FF_RUMBLE, info->input_dev->ffbit); ret = input_ff_create_memless(info->input_dev, NULL, vibra_play); if (ret < 0) { dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n"); return ret; } ret = input_register_device(info->input_dev); if (ret < 0) { dev_dbg(&pdev->dev, "couldn't register input device\n"); goto err_iff; } vibra_disable_leds(); platform_set_drvdata(pdev, info); return 0; err_iff: input_ff_destroy(info->input_dev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jari Vanhala25184.51%116.67%
Peter Ujfalusi4013.47%350.00%
Jingoo Han41.35%116.67%
Samuel Ortiz20.67%116.67%
Total297100.00%6100.00%

static struct platform_driver twl4030_vibra_driver = { .probe = twl4030_vibra_probe, .driver = { .name = "twl4030-vibra", .pm = &twl4030_vibra_pm_ops, }, }; module_platform_driver(twl4030_vibra_driver); MODULE_ALIAS("platform:twl4030-vibra"); MODULE_DESCRIPTION("TWL4030 Vibra driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Nokia Corporation");

Overall Contributors

PersonTokensPropCommitsCommitProp
Jari Vanhala85887.64%16.67%
Peter Ujfalusi939.50%533.33%
Libo Chen70.72%16.67%
Marek Belisko60.61%16.67%
Jingoo Han60.61%213.33%
Tejun Heo30.31%16.67%
Liam Girdwood20.20%16.67%
Samuel Ortiz20.20%16.67%
JJ Ding10.10%16.67%
Dmitry Torokhov10.10%16.67%
Total979100.00%15100.00%
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