265 lines
6.4 KiB
C
265 lines
6.4 KiB
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, ®, LEDEN);
|
|
reg &= ~0x03;
|
|
twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
|
|
}
|
|
|
|
/* 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,
|
|
®, 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;
|
|
}
|
|
|
|
static void vibra_disable(struct vibra_info *info)
|
|
{
|
|
u8 reg;
|
|
|
|
/* Power down H-Bridge */
|
|
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
|
|
®, 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;
|
|
}
|
|
|
|
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,
|
|
®, 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,
|
|
®, 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);
|
|
}
|
|
}
|
|
|
|
/*** 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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*** Module ***/
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int 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;
|
|
}
|
|
|
|
static int twl4030_vibra_resume(struct device *dev)
|
|
{
|
|
vibra_disable_leds();
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
|
|
if (of_find_node_by_name(node, "codec")) {
|
|
of_node_put(node);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
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->dev.parent = pdev->dev.parent;
|
|
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;
|
|
}
|
|
|
|
static struct platform_driver twl4030_vibra_driver = {
|
|
.probe = twl4030_vibra_probe,
|
|
.driver = {
|
|
.name = "twl4030-vibra",
|
|
.owner = THIS_MODULE,
|
|
.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");
|