| /* |
| * 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/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 workqueue_struct *workqueue; |
| 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; |
| queue_work(info->workqueue, &info->play_work); |
| return 0; |
| } |
| |
| static int twl4030_vibra_open(struct input_dev *input) |
| { |
| struct vibra_info *info = input_get_drvdata(input); |
| |
| info->workqueue = create_singlethread_workqueue("vibra"); |
| if (info->workqueue == NULL) { |
| dev_err(&input->dev, "couldn't create workqueue\n"); |
| return -ENOMEM; |
| } |
| 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); |
| INIT_WORK(&info->play_work, vibra_play_work); /* cleanup */ |
| destroy_workqueue(info->workqueue); |
| info->workqueue = NULL; |
| |
| if (info->enabled) |
| vibra_disable(info); |
| } |
| |
| /*** Module ***/ |
| #if CONFIG_PM |
| 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; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops, |
| twl4030_vibra_suspend, twl4030_vibra_resume); |
| #endif |
| |
| static int __devinit twl4030_vibra_probe(struct platform_device *pdev) |
| { |
| struct twl4030_codec_vibra_data *pdata = pdev->dev.platform_data; |
| struct vibra_info *info; |
| int ret; |
| |
| if (!pdata) { |
| dev_dbg(&pdev->dev, "platform_data not available\n"); |
| return -EINVAL; |
| } |
| |
| info = kzalloc(sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| info->dev = &pdev->dev; |
| info->coexist = pdata->coexist; |
| INIT_WORK(&info->play_work, vibra_play_work); |
| |
| info->input_dev = input_allocate_device(); |
| if (info->input_dev == NULL) { |
| dev_err(&pdev->dev, "couldn't allocate input device\n"); |
| ret = -ENOMEM; |
| goto err_kzalloc; |
| } |
| |
| 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->open = twl4030_vibra_open; |
| 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"); |
| goto err_ialloc; |
| } |
| |
| 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); |
| err_ialloc: |
| input_free_device(info->input_dev); |
| err_kzalloc: |
| kfree(info); |
| return ret; |
| } |
| |
| static int __devexit twl4030_vibra_remove(struct platform_device *pdev) |
| { |
| struct vibra_info *info = platform_get_drvdata(pdev); |
| |
| /* this also free ff-memless and calls close if needed */ |
| input_unregister_device(info->input_dev); |
| kfree(info); |
| platform_set_drvdata(pdev, NULL); |
| |
| return 0; |
| } |
| |
| static struct platform_driver twl4030_vibra_driver = { |
| .probe = twl4030_vibra_probe, |
| .remove = __devexit_p(twl4030_vibra_remove), |
| .driver = { |
| .name = "twl4030-vibra", |
| .owner = THIS_MODULE, |
| #ifdef CONFIG_PM |
| .pm = &twl4030_vibra_pm_ops, |
| #endif |
| }, |
| }; |
| |
| static int __init twl4030_vibra_init(void) |
| { |
| return platform_driver_register(&twl4030_vibra_driver); |
| } |
| module_init(twl4030_vibra_init); |
| |
| static void __exit twl4030_vibra_exit(void) |
| { |
| platform_driver_unregister(&twl4030_vibra_driver); |
| } |
| module_exit(twl4030_vibra_exit); |
| |
| MODULE_ALIAS("platform:twl4030-vibra"); |
| |
| MODULE_DESCRIPTION("TWL4030 Vibra driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Nokia Corporation"); |