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Release 4.11 drivers/input/misc/twl6040-vibra.c

/*
 * 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/of.h>
#include <linux/workqueue.h>
#include <linux/input.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 work_struct play_work;

	
int irq;

	
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_VIBENA); } if (status & TWL6040_VIBROCDET) { dev_warn(info->dev, "Right Vibrator overcurrent detected\n"); twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR, TWL6040_VIBENA); } return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz9497.92%150.00%
Peter Ujfalusi22.08%150.00%
Total96100.00%2100.00%


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_get_revid(twl6040) <= 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_VIBENA | TWL6040_VIBCTRL); twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, TWL6040_VIBENA | TWL6040_VIBCTRL); usleep_range(3000, 3500); } twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, TWL6040_VIBENA); twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, TWL6040_VIBENA); info->enabled = true; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz12293.13%133.33%
Peter Ujfalusi96.87%266.67%
Total131100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz67100.00%1100.00%
Total67100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz91100.00%1100.00%
Total91100.00%1100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz126100.00%1100.00%
Total126100.00%1100.00%


static void vibra_play_work(struct work_struct *work) { struct vibra_info *info = container_of(work, struct vibra_info, play_work); int ret; /* Do not allow effect, while the routing is set to use audio */ ret = twl6040_get_vibralr_status(info->twl6040); if (ret & TWL6040_VIBSEL) { dev_info(info->dev, "Vibra is configured for audio\n"); return; } 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); }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz6768.37%150.00%
H. Nikolaus Schaller3131.63%150.00%
Total98100.00%2100.00%


static int vibra_play(struct input_dev *input, void *data, struct ff_effect *effect) { struct vibra_info *info = input_get_drvdata(input); 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; schedule_work(&info->play_work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz7998.75%150.00%
H. Nikolaus Schaller11.25%150.00%
Total80100.00%2100.00%


static void twl6040_vibra_close(struct input_dev *input) { struct vibra_info *info = input_get_drvdata(input); cancel_work_sync(&info->play_work); if (info->enabled) twl6040_vibra_disable(info); }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz40100.00%1100.00%
Total40100.00%1100.00%


static int __maybe_unused twl6040_vibra_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct vibra_info *info = platform_get_drvdata(pdev); cancel_work_sync(&info->play_work); if (info->enabled) twl6040_vibra_disable(info); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz5194.44%133.33%
H. Nikolaus Schaller23.70%133.33%
Jingoo Han11.85%133.33%
Total54100.00%3100.00%

static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
static int twl6040_vibra_probe(struct platform_device *pdev) { struct device *twl6040_core_dev = pdev->dev.parent; struct device_node *twl6040_core_node; struct vibra_info *info; int vddvibl_uV = 0; int vddvibr_uV = 0; int error; of_node_get(twl6040_core_dev->of_node); twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node, "vibra"); if (!twl6040_core_node) { dev_err(&pdev->dev, "parent of node is missing?\n"); return -EINVAL; } info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) { of_node_put(twl6040_core_node); dev_err(&pdev->dev, "couldn't allocate memory\n"); return -ENOMEM; } info->dev = &pdev->dev; info->twl6040 = dev_get_drvdata(pdev->dev.parent); of_property_read_u32(twl6040_core_node, "ti,vibldrv-res", &info->vibldrv_res); of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res", &info->vibrdrv_res); of_property_read_u32(twl6040_core_node, "ti,viblmotor-res", &info->viblmotor_res); of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res", &info->vibrmotor_res); of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV", &vddvibl_uV); of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV", &vddvibr_uV); of_node_put(twl6040_core_node); if ((!info->vibldrv_res && !info->viblmotor_res) || (!info->vibrdrv_res && !info->vibrmotor_res)) { dev_err(info->dev, "invalid vibra driver/motor resistance\n"); return -EINVAL; } info->irq = platform_get_irq(pdev, 0); if (info->irq < 0) { dev_err(info->dev, "invalid irq\n"); return -EINVAL; } error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, twl6040_vib_irq_handler, IRQF_ONESHOT, "twl6040_irq_vib", info); if (error) { dev_err(info->dev, "VIB IRQ request failed: %d\n", error); return error; } info->supplies[0].supply = "vddvibl"; info->supplies[1].supply = "vddvibr"; /* * When booted with Device tree the regulators are attached to the * parent device (twl6040 MFD core) */ error = devm_regulator_bulk_get(twl6040_core_dev, ARRAY_SIZE(info->supplies), info->supplies); if (error) { dev_err(info->dev, "couldn't get regulators %d\n", error); return error; } if (vddvibl_uV) { error = regulator_set_voltage(info->supplies[0].consumer, vddvibl_uV, vddvibl_uV); if (error) { dev_err(info->dev, "failed to set VDDVIBL volt %d\n", error); return error; } } if (vddvibr_uV) { error = regulator_set_voltage(info->supplies[1].consumer, vddvibr_uV, vddvibr_uV); if (error) { dev_err(info->dev, "failed to set VDDVIBR volt %d\n", error); return error; } } INIT_WORK(&info->play_work, vibra_play_work); info->input_dev = devm_input_allocate_device(&pdev->dev); if (!info->input_dev) { dev_err(info->dev, "couldn't allocate input device\n"); return -ENOMEM; } input_set_drvdata(info->input_dev, info); info->input_dev->name = "twl6040:vibrator"; info->input_dev->id.version = 1; info->input_dev->close = twl6040_vibra_close; __set_bit(FF_RUMBLE, info->input_dev->ffbit); error = input_ff_create_memless(info->input_dev, NULL, vibra_play); if (error) { dev_err(info->dev, "couldn't register vibrator to FF\n"); return error; } error = input_register_device(info->input_dev); if (error) { dev_err(info->dev, "couldn't register input device\n"); return error; } platform_set_drvdata(pdev, info); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz34352.85%110.00%
Peter Ujfalusi24738.06%550.00%
Fabio Estevam426.47%220.00%
Libo Chen101.54%110.00%
H. Nikolaus Schaller71.08%110.00%
Total649100.00%10100.00%

static struct platform_driver twl6040_vibra_driver = { .probe = twl6040_vibra_probe, .driver = { .name = "twl6040-vibra", .pm = &twl6040_vibra_pm_ops, }, }; module_platform_driver(twl6040_vibra_driver); 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>");

Overall Contributors

PersonTokensPropCommitsCommitProp
Misael Lopez Cruz124377.54%15.56%
Peter Ujfalusi26516.53%844.44%
Fabio Estevam422.62%211.11%
H. Nikolaus Schaller412.56%422.22%
Libo Chen100.62%15.56%
Jingoo Han10.06%15.56%
JJ Ding10.06%15.56%
Total1603100.00%18100.00%
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