2 * twl4030-vibra.c - TWL4030 Vibrator driver
4 * Copyright (C) 2008-2010 Nokia Corporation
6 * Written by Henrik Saari <henrik.saari@nokia.com>
7 * Updates by Felipe Balbi <felipe.balbi@nokia.com>
8 * Input by Jari Vanhala <ext-jari.vanhala@nokia.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
26 #include <linux/module.h>
27 #include <linux/jiffies.h>
28 #include <linux/platform_device.h>
29 #include <linux/workqueue.h>
30 #include <linux/i2c/twl.h>
31 #include <linux/mfd/twl4030-codec.h>
32 #include <linux/input.h>
38 #define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
42 struct input_dev *input_dev;
44 struct workqueue_struct *workqueue;
45 struct work_struct play_work;
54 static void vibra_disable_leds(void)
58 /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
59 twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
61 twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
64 /* Powers H-Bridge and enables audio clk */
65 static void vibra_enable(struct vibra_info *info)
69 twl4030_codec_enable_resource(TWL4030_CODEC_RES_POWER);
71 /* turn H-Bridge on */
72 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
73 ®, TWL4030_REG_VIBRA_CTL);
74 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
75 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
77 twl4030_codec_enable_resource(TWL4030_CODEC_RES_APLL);
82 static void vibra_disable(struct vibra_info *info)
86 /* Power down H-Bridge */
87 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
88 ®, TWL4030_REG_VIBRA_CTL);
89 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
90 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
92 twl4030_codec_disable_resource(TWL4030_CODEC_RES_POWER);
93 twl4030_codec_disable_resource(TWL4030_CODEC_RES_APLL);
95 info->enabled = false;
98 static void vibra_play_work(struct work_struct *work)
100 struct vibra_info *info = container_of(work,
101 struct vibra_info, play_work);
106 dir = info->direction;
109 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
110 ®, TWL4030_REG_VIBRA_CTL);
111 if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
116 /* set vibra rotation direction */
117 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
118 ®, TWL4030_REG_VIBRA_CTL);
119 reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
120 (reg & ~TWL4030_VIBRA_DIR);
121 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
122 reg, TWL4030_REG_VIBRA_CTL);
124 /* set PWM, 1 = max, 255 = min */
125 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
126 256 - pwm, TWL4030_REG_VIBRA_SET);
133 /*** Input/ForceFeedback ***/
135 static int vibra_play(struct input_dev *input, void *data,
136 struct ff_effect *effect)
138 struct vibra_info *info = input_get_drvdata(input);
140 info->speed = effect->u.rumble.strong_magnitude >> 8;
142 info->speed = effect->u.rumble.weak_magnitude >> 9;
143 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
144 queue_work(info->workqueue, &info->play_work);
148 static int twl4030_vibra_open(struct input_dev *input)
150 struct vibra_info *info = input_get_drvdata(input);
152 info->workqueue = create_singlethread_workqueue("vibra");
153 if (info->workqueue == NULL) {
154 dev_err(&input->dev, "couldn't create workqueue\n");
160 static void twl4030_vibra_close(struct input_dev *input)
162 struct vibra_info *info = input_get_drvdata(input);
164 cancel_work_sync(&info->play_work);
165 INIT_WORK(&info->play_work, vibra_play_work); /* cleanup */
166 destroy_workqueue(info->workqueue);
167 info->workqueue = NULL;
175 static int twl4030_vibra_suspend(struct device *dev)
177 struct platform_device *pdev = to_platform_device(dev);
178 struct vibra_info *info = platform_get_drvdata(pdev);
186 static int twl4030_vibra_resume(struct device *dev)
188 vibra_disable_leds();
192 static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
193 twl4030_vibra_suspend, twl4030_vibra_resume);
196 static int __devinit twl4030_vibra_probe(struct platform_device *pdev)
198 struct twl4030_codec_vibra_data *pdata = pdev->dev.platform_data;
199 struct vibra_info *info;
203 dev_dbg(&pdev->dev, "platform_data not available\n");
207 info = kzalloc(sizeof(*info), GFP_KERNEL);
211 info->dev = &pdev->dev;
212 info->coexist = pdata->coexist;
213 INIT_WORK(&info->play_work, vibra_play_work);
215 info->input_dev = input_allocate_device();
216 if (info->input_dev == NULL) {
217 dev_err(&pdev->dev, "couldn't allocate input device\n");
222 input_set_drvdata(info->input_dev, info);
224 info->input_dev->name = "twl4030:vibrator";
225 info->input_dev->id.version = 1;
226 info->input_dev->dev.parent = pdev->dev.parent;
227 info->input_dev->open = twl4030_vibra_open;
228 info->input_dev->close = twl4030_vibra_close;
229 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
231 ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
233 dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
237 ret = input_register_device(info->input_dev);
239 dev_dbg(&pdev->dev, "couldn't register input device\n");
243 vibra_disable_leds();
245 platform_set_drvdata(pdev, info);
249 input_ff_destroy(info->input_dev);
251 input_free_device(info->input_dev);
257 static int __devexit twl4030_vibra_remove(struct platform_device *pdev)
259 struct vibra_info *info = platform_get_drvdata(pdev);
261 /* this also free ff-memless and calls close if needed */
262 input_unregister_device(info->input_dev);
264 platform_set_drvdata(pdev, NULL);
269 static struct platform_driver twl4030_vibra_driver = {
270 .probe = twl4030_vibra_probe,
271 .remove = __devexit_p(twl4030_vibra_remove),
273 .name = "twl4030_codec_vibra",
274 .owner = THIS_MODULE,
276 .pm = &twl4030_vibra_pm_ops,
281 static int __init twl4030_vibra_init(void)
283 return platform_driver_register(&twl4030_vibra_driver);
285 module_init(twl4030_vibra_init);
287 static void __exit twl4030_vibra_exit(void)
289 platform_driver_unregister(&twl4030_vibra_driver);
291 module_exit(twl4030_vibra_exit);
293 MODULE_ALIAS("platform:twl4030_codec_vibra");
295 MODULE_DESCRIPTION("TWL4030 Vibra driver");
296 MODULE_LICENSE("GPL");
297 MODULE_AUTHOR("Nokia Corporation");