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>
30 #include <linux/workqueue.h>
31 #include <linux/i2c/twl.h>
32 #include <linux/mfd/twl4030-audio.h>
33 #include <linux/input.h>
34 #include <linux/slab.h>
40 #define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
44 struct input_dev *input_dev;
46 struct workqueue_struct *workqueue;
47 struct work_struct play_work;
56 static void vibra_disable_leds(void)
60 /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
61 twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
63 twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
66 /* Powers H-Bridge and enables audio clk */
67 static void vibra_enable(struct vibra_info *info)
71 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
73 /* turn H-Bridge on */
74 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
75 ®, TWL4030_REG_VIBRA_CTL);
76 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
77 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
79 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
84 static void vibra_disable(struct vibra_info *info)
88 /* Power down H-Bridge */
89 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
90 ®, TWL4030_REG_VIBRA_CTL);
91 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
92 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
94 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
95 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
97 info->enabled = false;
100 static void vibra_play_work(struct work_struct *work)
102 struct vibra_info *info = container_of(work,
103 struct vibra_info, play_work);
108 dir = info->direction;
111 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
112 ®, TWL4030_REG_VIBRA_CTL);
113 if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
118 /* set vibra rotation direction */
119 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
120 ®, TWL4030_REG_VIBRA_CTL);
121 reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
122 (reg & ~TWL4030_VIBRA_DIR);
123 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
124 reg, TWL4030_REG_VIBRA_CTL);
126 /* set PWM, 1 = max, 255 = min */
127 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
128 256 - pwm, TWL4030_REG_VIBRA_SET);
135 /*** Input/ForceFeedback ***/
137 static int vibra_play(struct input_dev *input, void *data,
138 struct ff_effect *effect)
140 struct vibra_info *info = input_get_drvdata(input);
142 info->speed = effect->u.rumble.strong_magnitude >> 8;
144 info->speed = effect->u.rumble.weak_magnitude >> 9;
145 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
146 queue_work(info->workqueue, &info->play_work);
150 static int twl4030_vibra_open(struct input_dev *input)
152 struct vibra_info *info = input_get_drvdata(input);
154 info->workqueue = create_singlethread_workqueue("vibra");
155 if (info->workqueue == NULL) {
156 dev_err(&input->dev, "couldn't create workqueue\n");
162 static void twl4030_vibra_close(struct input_dev *input)
164 struct vibra_info *info = input_get_drvdata(input);
166 cancel_work_sync(&info->play_work);
167 INIT_WORK(&info->play_work, vibra_play_work); /* cleanup */
168 destroy_workqueue(info->workqueue);
169 info->workqueue = NULL;
176 #ifdef CONFIG_PM_SLEEP
177 static int twl4030_vibra_suspend(struct device *dev)
179 struct platform_device *pdev = to_platform_device(dev);
180 struct vibra_info *info = platform_get_drvdata(pdev);
188 static int twl4030_vibra_resume(struct device *dev)
190 vibra_disable_leds();
195 static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
196 twl4030_vibra_suspend, twl4030_vibra_resume);
198 static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
199 struct device_node *node)
201 if (pdata && pdata->coexist)
204 if (of_find_node_by_name(node, "codec"))
210 static int twl4030_vibra_probe(struct platform_device *pdev)
212 struct twl4030_vibra_data *pdata = pdev->dev.platform_data;
213 struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
214 struct vibra_info *info;
217 if (!pdata && !twl4030_core_node) {
218 dev_dbg(&pdev->dev, "platform_data not available\n");
222 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
226 info->dev = &pdev->dev;
227 info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node);
228 INIT_WORK(&info->play_work, vibra_play_work);
230 info->input_dev = devm_input_allocate_device(&pdev->dev);
231 if (info->input_dev == NULL) {
232 dev_err(&pdev->dev, "couldn't allocate input device\n");
236 input_set_drvdata(info->input_dev, info);
238 info->input_dev->name = "twl4030:vibrator";
239 info->input_dev->id.version = 1;
240 info->input_dev->dev.parent = pdev->dev.parent;
241 info->input_dev->open = twl4030_vibra_open;
242 info->input_dev->close = twl4030_vibra_close;
243 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
245 ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
247 dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
251 ret = input_register_device(info->input_dev);
253 dev_dbg(&pdev->dev, "couldn't register input device\n");
257 vibra_disable_leds();
259 platform_set_drvdata(pdev, info);
263 input_ff_destroy(info->input_dev);
267 static struct platform_driver twl4030_vibra_driver = {
268 .probe = twl4030_vibra_probe,
270 .name = "twl4030-vibra",
271 .owner = THIS_MODULE,
272 .pm = &twl4030_vibra_pm_ops,
275 module_platform_driver(twl4030_vibra_driver);
277 MODULE_ALIAS("platform:twl4030-vibra");
278 MODULE_DESCRIPTION("TWL4030 Vibra driver");
279 MODULE_LICENSE("GPL");
280 MODULE_AUTHOR("Nokia Corporation");