| /* |
| * twl6040-vibra.c - TWL6040 Vibrator driver |
| * |
| * Author: Jorge Eduardo Candelaria <jorge.candelaria@ti.com> |
| * Author: Misael Lopez Cruz <misael.lopez@ti.com> |
| * |
| * Copyright: (C) 2011 Texas Instruments, Inc. |
| * |
| * Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com> |
| * Felipe Balbi <felipe.balbi@nokia.com> |
| * Jari Vanhala <ext-javi.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/platform_device.h> |
| #include <linux/workqueue.h> |
| #include <linux/i2c/twl.h> |
| #include <linux/mfd/twl6040.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/regulator/consumer.h> |
| |
| #define EFFECT_DIR_180_DEG 0x8000 |
| |
| /* Recommended modulation index 85% */ |
| #define TWL6040_VIBRA_MOD 85 |
| |
| #define TWL6040_NUM_SUPPLIES 2 |
| |
| struct vibra_info { |
| struct device *dev; |
| struct input_dev *input_dev; |
| struct workqueue_struct *workqueue; |
| struct work_struct play_work; |
| struct mutex mutex; |
| |
| bool enabled; |
| int weak_speed; |
| int strong_speed; |
| int direction; |
| |
| unsigned int vibldrv_res; |
| unsigned int vibrdrv_res; |
| unsigned int viblmotor_res; |
| unsigned int vibrmotor_res; |
| |
| struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES]; |
| |
| struct twl6040 *twl6040; |
| }; |
| |
| static irqreturn_t twl6040_vib_irq_handler(int irq, void *data) |
| { |
| struct vibra_info *info = data; |
| struct twl6040 *twl6040 = info->twl6040; |
| u8 status; |
| |
| status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); |
| if (status & TWL6040_VIBLOCDET) { |
| dev_warn(info->dev, "Left Vibrator overcurrent detected\n"); |
| twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL, |
| TWL6040_VIBENAL); |
| } |
| if (status & TWL6040_VIBROCDET) { |
| dev_warn(info->dev, "Right Vibrator overcurrent detected\n"); |
| twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR, |
| TWL6040_VIBENAR); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void twl6040_vibra_enable(struct vibra_info *info) |
| { |
| struct twl6040 *twl6040 = info->twl6040; |
| int ret; |
| |
| ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies); |
| if (ret) { |
| dev_err(info->dev, "failed to enable regulators %d\n", ret); |
| return; |
| } |
| |
| twl6040_power(info->twl6040, 1); |
| if (twl6040->rev <= TWL6040_REV_ES1_1) { |
| /* |
| * ERRATA: Disable overcurrent protection for at least |
| * 3ms when enabling vibrator drivers to avoid false |
| * overcurrent detection |
| */ |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, |
| TWL6040_VIBENAL | TWL6040_VIBCTRLL); |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
| TWL6040_VIBENAR | TWL6040_VIBCTRLR); |
| usleep_range(3000, 3500); |
| } |
| |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, |
| TWL6040_VIBENAL); |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
| TWL6040_VIBENAR); |
| |
| info->enabled = true; |
| } |
| |
| static void twl6040_vibra_disable(struct vibra_info *info) |
| { |
| struct twl6040 *twl6040 = info->twl6040; |
| |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00); |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00); |
| twl6040_power(info->twl6040, 0); |
| |
| regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies); |
| |
| info->enabled = false; |
| } |
| |
| static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res, |
| int speed, int direction) |
| { |
| int vpk, max_code; |
| u8 vibdat; |
| |
| /* output swing */ |
| vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) / |
| (100 * (vibdrv_res + motor_res)); |
| |
| /* 50mV per VIBDAT code step */ |
| max_code = vpk / 50; |
| if (max_code > TWL6040_VIBDAT_MAX) |
| max_code = TWL6040_VIBDAT_MAX; |
| |
| /* scale speed to max allowed code */ |
| vibdat = (u8)((speed * max_code) / USHRT_MAX); |
| |
| /* 2's complement for direction > 180 degrees */ |
| vibdat *= direction; |
| |
| return vibdat; |
| } |
| |
| static void twl6040_vibra_set_effect(struct vibra_info *info) |
| { |
| struct twl6040 *twl6040 = info->twl6040; |
| u8 vibdatl, vibdatr; |
| int volt; |
| |
| /* weak motor */ |
| volt = regulator_get_voltage(info->supplies[0].consumer) / 1000; |
| vibdatl = twl6040_vibra_code(volt, info->vibldrv_res, |
| info->viblmotor_res, |
| info->weak_speed, info->direction); |
| |
| /* strong motor */ |
| volt = regulator_get_voltage(info->supplies[1].consumer) / 1000; |
| vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res, |
| info->vibrmotor_res, |
| info->strong_speed, info->direction); |
| |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl); |
| twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr); |
| } |
| |
| static void vibra_play_work(struct work_struct *work) |
| { |
| struct vibra_info *info = container_of(work, |
| struct vibra_info, play_work); |
| |
| mutex_lock(&info->mutex); |
| |
| if (info->weak_speed || info->strong_speed) { |
| if (!info->enabled) |
| twl6040_vibra_enable(info); |
| |
| twl6040_vibra_set_effect(info); |
| } else if (info->enabled) |
| twl6040_vibra_disable(info); |
| |
| mutex_unlock(&info->mutex); |
| } |
| |
| static int vibra_play(struct input_dev *input, void *data, |
| struct ff_effect *effect) |
| { |
| struct vibra_info *info = input_get_drvdata(input); |
| int ret; |
| |
| info->weak_speed = effect->u.rumble.weak_magnitude; |
| info->strong_speed = effect->u.rumble.strong_magnitude; |
| info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1; |
| |
| ret = queue_work(info->workqueue, &info->play_work); |
| if (!ret) { |
| dev_info(&input->dev, "work is already on queue\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void twl6040_vibra_close(struct input_dev *input) |
| { |
| struct vibra_info *info = input_get_drvdata(input); |
| |
| cancel_work_sync(&info->play_work); |
| |
| mutex_lock(&info->mutex); |
| |
| if (info->enabled) |
| twl6040_vibra_disable(info); |
| |
| mutex_unlock(&info->mutex); |
| } |
| |
| #if CONFIG_PM_SLEEP |
| static int twl6040_vibra_suspend(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct vibra_info *info = platform_get_drvdata(pdev); |
| |
| mutex_lock(&info->mutex); |
| |
| if (info->enabled) |
| twl6040_vibra_disable(info); |
| |
| mutex_unlock(&info->mutex); |
| |
| return 0; |
| } |
| |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL); |
| |
| static int __devinit twl6040_vibra_probe(struct platform_device *pdev) |
| { |
| struct twl4030_vibra_data *pdata = pdev->dev.platform_data; |
| struct vibra_info *info; |
| int ret; |
| |
| if (!pdata) { |
| dev_err(&pdev->dev, "platform_data not available\n"); |
| return -EINVAL; |
| } |
| |
| info = kzalloc(sizeof(*info), GFP_KERNEL); |
| if (!info) { |
| dev_err(&pdev->dev, "couldn't allocate memory\n"); |
| return -ENOMEM; |
| } |
| |
| info->dev = &pdev->dev; |
| info->twl6040 = dev_get_drvdata(pdev->dev.parent); |
| info->vibldrv_res = pdata->vibldrv_res; |
| info->vibrdrv_res = pdata->vibrdrv_res; |
| info->viblmotor_res = pdata->viblmotor_res; |
| info->vibrmotor_res = pdata->vibrmotor_res; |
| if ((!info->vibldrv_res && !info->viblmotor_res) || |
| (!info->vibrdrv_res && !info->vibrmotor_res)) { |
| dev_err(info->dev, "invalid vibra driver/motor resistance\n"); |
| ret = -EINVAL; |
| goto err_kzalloc; |
| } |
| |
| mutex_init(&info->mutex); |
| |
| info->input_dev = input_allocate_device(); |
| if (info->input_dev == NULL) { |
| dev_err(info->dev, "couldn't allocate input device\n"); |
| ret = -ENOMEM; |
| goto err_kzalloc; |
| } |
| |
| input_set_drvdata(info->input_dev, info); |
| |
| info->input_dev->name = "twl6040:vibrator"; |
| info->input_dev->id.version = 1; |
| info->input_dev->dev.parent = pdev->dev.parent; |
| info->input_dev->close = twl6040_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_err(info->dev, "couldn't register vibrator to FF\n"); |
| goto err_ialloc; |
| } |
| |
| ret = input_register_device(info->input_dev); |
| if (ret < 0) { |
| dev_err(info->dev, "couldn't register input device\n"); |
| goto err_iff; |
| } |
| |
| platform_set_drvdata(pdev, info); |
| |
| ret = twl6040_request_irq(info->twl6040, TWL6040_IRQ_VIB, |
| twl6040_vib_irq_handler, 0, |
| "twl6040_irq_vib", info); |
| if (ret) { |
| dev_err(info->dev, "VIB IRQ request failed: %d\n", ret); |
| goto err_irq; |
| } |
| |
| info->supplies[0].supply = "vddvibl"; |
| info->supplies[1].supply = "vddvibr"; |
| ret = regulator_bulk_get(info->dev, ARRAY_SIZE(info->supplies), |
| info->supplies); |
| if (ret) { |
| dev_err(info->dev, "couldn't get regulators %d\n", ret); |
| goto err_regulator; |
| } |
| |
| if (pdata->vddvibl_uV) { |
| ret = regulator_set_voltage(info->supplies[0].consumer, |
| pdata->vddvibl_uV, |
| pdata->vddvibl_uV); |
| if (ret) { |
| dev_err(info->dev, "failed to set VDDVIBL volt %d\n", |
| ret); |
| goto err_voltage; |
| } |
| } |
| |
| if (pdata->vddvibr_uV) { |
| ret = regulator_set_voltage(info->supplies[1].consumer, |
| pdata->vddvibr_uV, |
| pdata->vddvibr_uV); |
| if (ret) { |
| dev_err(info->dev, "failed to set VDDVIBR volt %d\n", |
| ret); |
| goto err_voltage; |
| } |
| } |
| |
| info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0); |
| if (info->workqueue == NULL) { |
| dev_err(info->dev, "couldn't create workqueue\n"); |
| ret = -ENOMEM; |
| goto err_voltage; |
| } |
| INIT_WORK(&info->play_work, vibra_play_work); |
| |
| return 0; |
| |
| err_voltage: |
| regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies); |
| err_regulator: |
| twl6040_free_irq(info->twl6040, TWL6040_IRQ_VIB, info); |
| err_irq: |
| input_unregister_device(info->input_dev); |
| info->input_dev = NULL; |
| err_iff: |
| if (info->input_dev) |
| input_ff_destroy(info->input_dev); |
| err_ialloc: |
| input_free_device(info->input_dev); |
| err_kzalloc: |
| kfree(info); |
| return ret; |
| } |
| |
| static int __devexit twl6040_vibra_remove(struct platform_device *pdev) |
| { |
| struct vibra_info *info = platform_get_drvdata(pdev); |
| |
| input_unregister_device(info->input_dev); |
| twl6040_free_irq(info->twl6040, TWL6040_IRQ_VIB, info); |
| regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies); |
| destroy_workqueue(info->workqueue); |
| kfree(info); |
| |
| return 0; |
| } |
| |
| static struct platform_driver twl6040_vibra_driver = { |
| .probe = twl6040_vibra_probe, |
| .remove = __devexit_p(twl6040_vibra_remove), |
| .driver = { |
| .name = "twl6040-vibra", |
| .owner = THIS_MODULE, |
| .pm = &twl6040_vibra_pm_ops, |
| }, |
| }; |
| |
| static int __init twl6040_vibra_init(void) |
| { |
| return platform_driver_register(&twl6040_vibra_driver); |
| } |
| module_init(twl6040_vibra_init); |
| |
| static void __exit twl6040_vibra_exit(void) |
| { |
| platform_driver_unregister(&twl6040_vibra_driver); |
| } |
| module_exit(twl6040_vibra_exit); |
| |
| MODULE_ALIAS("platform:twl6040-vibra"); |
| MODULE_DESCRIPTION("TWL6040 Vibra driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); |
| MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); |