424 lines
11 KiB
C
424 lines
11 KiB
C
/*
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* twl6040-vibra.c - TWL6040 Vibrator driver
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*
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* Author: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
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* Author: Misael Lopez Cruz <misael.lopez@ti.com>
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*
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* Copyright: (C) 2011 Texas Instruments, Inc.
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*
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* Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com>
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* Felipe Balbi <felipe.balbi@nokia.com>
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* Jari Vanhala <ext-javi.vanhala@nokia.com>
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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 as
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* 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/workqueue.h>
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#include <linux/i2c/twl.h>
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#include <linux/mfd/twl6040.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/regulator/consumer.h>
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#define EFFECT_DIR_180_DEG 0x8000
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/* Recommended modulation index 85% */
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#define TWL6040_VIBRA_MOD 85
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#define TWL6040_NUM_SUPPLIES 2
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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 workqueue_struct *workqueue;
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struct work_struct play_work;
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struct mutex mutex;
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int irq;
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bool enabled;
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int weak_speed;
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int strong_speed;
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int direction;
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unsigned int vibldrv_res;
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unsigned int vibrdrv_res;
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unsigned int viblmotor_res;
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unsigned int vibrmotor_res;
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struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
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struct twl6040 *twl6040;
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};
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static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
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{
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struct vibra_info *info = data;
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struct twl6040 *twl6040 = info->twl6040;
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u8 status;
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status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
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if (status & TWL6040_VIBLOCDET) {
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dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
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twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
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TWL6040_VIBENAL);
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}
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if (status & TWL6040_VIBROCDET) {
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dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
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twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
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TWL6040_VIBENAR);
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}
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return IRQ_HANDLED;
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}
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static void twl6040_vibra_enable(struct vibra_info *info)
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{
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struct twl6040 *twl6040 = info->twl6040;
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
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if (ret) {
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dev_err(info->dev, "failed to enable regulators %d\n", ret);
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return;
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}
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twl6040_power(info->twl6040, 1);
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if (twl6040->rev <= TWL6040_REV_ES1_1) {
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/*
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* ERRATA: Disable overcurrent protection for at least
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* 3ms when enabling vibrator drivers to avoid false
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* overcurrent detection
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*/
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
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TWL6040_VIBENAL | TWL6040_VIBCTRLL);
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
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TWL6040_VIBENAR | TWL6040_VIBCTRLR);
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usleep_range(3000, 3500);
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}
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
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TWL6040_VIBENAL);
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
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TWL6040_VIBENAR);
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info->enabled = true;
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}
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static void twl6040_vibra_disable(struct vibra_info *info)
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{
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struct twl6040 *twl6040 = info->twl6040;
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
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twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
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twl6040_power(info->twl6040, 0);
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regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
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info->enabled = false;
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}
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static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
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int speed, int direction)
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{
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int vpk, max_code;
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u8 vibdat;
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/* output swing */
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vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
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(100 * (vibdrv_res + motor_res));
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/* 50mV per VIBDAT code step */
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max_code = vpk / 50;
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if (max_code > TWL6040_VIBDAT_MAX)
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max_code = TWL6040_VIBDAT_MAX;
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/* scale speed to max allowed code */
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vibdat = (u8)((speed * max_code) / USHRT_MAX);
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/* 2's complement for direction > 180 degrees */
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vibdat *= direction;
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return vibdat;
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}
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static void twl6040_vibra_set_effect(struct vibra_info *info)
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{
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struct twl6040 *twl6040 = info->twl6040;
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u8 vibdatl, vibdatr;
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int volt;
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/* weak motor */
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volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
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vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
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info->viblmotor_res,
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info->weak_speed, info->direction);
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/* strong motor */
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volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
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vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
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info->vibrmotor_res,
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info->strong_speed, info->direction);
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twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
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twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
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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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mutex_lock(&info->mutex);
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if (info->weak_speed || info->strong_speed) {
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if (!info->enabled)
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twl6040_vibra_enable(info);
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twl6040_vibra_set_effect(info);
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} else if (info->enabled)
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twl6040_vibra_disable(info);
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mutex_unlock(&info->mutex);
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}
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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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int ret;
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info->weak_speed = effect->u.rumble.weak_magnitude;
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info->strong_speed = effect->u.rumble.strong_magnitude;
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info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
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ret = queue_work(info->workqueue, &info->play_work);
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if (!ret) {
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dev_info(&input->dev, "work is already on queue\n");
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return ret;
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}
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return 0;
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}
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static void twl6040_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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mutex_lock(&info->mutex);
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if (info->enabled)
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twl6040_vibra_disable(info);
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mutex_unlock(&info->mutex);
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}
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#if CONFIG_PM_SLEEP
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static int twl6040_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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mutex_lock(&info->mutex);
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if (info->enabled)
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twl6040_vibra_disable(info);
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mutex_unlock(&info->mutex);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
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static int __devinit twl6040_vibra_probe(struct platform_device *pdev)
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{
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struct twl4030_vibra_data *pdata = pdev->dev.platform_data;
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struct vibra_info *info;
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int ret;
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if (!pdata) {
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dev_err(&pdev->dev, "platform_data not available\n");
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return -EINVAL;
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}
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info) {
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dev_err(&pdev->dev, "couldn't allocate memory\n");
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return -ENOMEM;
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}
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info->dev = &pdev->dev;
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info->twl6040 = dev_get_drvdata(pdev->dev.parent);
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info->vibldrv_res = pdata->vibldrv_res;
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info->vibrdrv_res = pdata->vibrdrv_res;
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info->viblmotor_res = pdata->viblmotor_res;
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info->vibrmotor_res = pdata->vibrmotor_res;
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if ((!info->vibldrv_res && !info->viblmotor_res) ||
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(!info->vibrdrv_res && !info->vibrmotor_res)) {
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dev_err(info->dev, "invalid vibra driver/motor resistance\n");
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ret = -EINVAL;
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goto err_kzalloc;
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}
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info->irq = platform_get_irq(pdev, 0);
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if (info->irq < 0) {
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dev_err(info->dev, "invalid irq\n");
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ret = -EINVAL;
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goto err_kzalloc;
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}
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mutex_init(&info->mutex);
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info->input_dev = input_allocate_device();
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if (info->input_dev == NULL) {
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dev_err(info->dev, "couldn't allocate input device\n");
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ret = -ENOMEM;
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goto err_kzalloc;
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}
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input_set_drvdata(info->input_dev, info);
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info->input_dev->name = "twl6040:vibrator";
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info->input_dev->id.version = 1;
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info->input_dev->dev.parent = pdev->dev.parent;
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info->input_dev->close = twl6040_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_err(info->dev, "couldn't register vibrator to FF\n");
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goto err_ialloc;
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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_err(info->dev, "couldn't register input device\n");
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goto err_iff;
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}
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platform_set_drvdata(pdev, info);
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ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
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"twl6040_irq_vib", info);
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if (ret) {
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dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
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goto err_irq;
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}
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info->supplies[0].supply = "vddvibl";
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info->supplies[1].supply = "vddvibr";
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ret = regulator_bulk_get(info->dev, ARRAY_SIZE(info->supplies),
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info->supplies);
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if (ret) {
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dev_err(info->dev, "couldn't get regulators %d\n", ret);
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goto err_regulator;
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}
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if (pdata->vddvibl_uV) {
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ret = regulator_set_voltage(info->supplies[0].consumer,
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pdata->vddvibl_uV,
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pdata->vddvibl_uV);
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if (ret) {
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dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
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ret);
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goto err_voltage;
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}
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}
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if (pdata->vddvibr_uV) {
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ret = regulator_set_voltage(info->supplies[1].consumer,
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pdata->vddvibr_uV,
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pdata->vddvibr_uV);
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if (ret) {
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dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
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ret);
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goto err_voltage;
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}
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}
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info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0);
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if (info->workqueue == NULL) {
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dev_err(info->dev, "couldn't create workqueue\n");
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ret = -ENOMEM;
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goto err_voltage;
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}
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INIT_WORK(&info->play_work, vibra_play_work);
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return 0;
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err_voltage:
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regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
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err_regulator:
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free_irq(info->irq, info);
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err_irq:
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input_unregister_device(info->input_dev);
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info->input_dev = NULL;
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err_iff:
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if (info->input_dev)
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input_ff_destroy(info->input_dev);
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err_ialloc:
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input_free_device(info->input_dev);
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err_kzalloc:
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kfree(info);
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return ret;
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}
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static int __devexit twl6040_vibra_remove(struct platform_device *pdev)
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{
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struct vibra_info *info = platform_get_drvdata(pdev);
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input_unregister_device(info->input_dev);
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free_irq(info->irq, info);
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regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
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destroy_workqueue(info->workqueue);
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kfree(info);
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return 0;
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}
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static struct platform_driver twl6040_vibra_driver = {
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.probe = twl6040_vibra_probe,
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.remove = __devexit_p(twl6040_vibra_remove),
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.driver = {
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.name = "twl6040-vibra",
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.owner = THIS_MODULE,
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.pm = &twl6040_vibra_pm_ops,
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},
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};
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static int __init twl6040_vibra_init(void)
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{
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return platform_driver_register(&twl6040_vibra_driver);
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}
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module_init(twl6040_vibra_init);
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static void __exit twl6040_vibra_exit(void)
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{
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platform_driver_unregister(&twl6040_vibra_driver);
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}
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module_exit(twl6040_vibra_exit);
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MODULE_ALIAS("platform:twl6040-vibra");
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MODULE_DESCRIPTION("TWL6040 Vibra driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
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MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
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