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1/*
2 * twl4030-vibra.c - TWL4030 Vibrator driver
3 *
4 * Copyright (C) 2008-2010 Nokia Corporation
5 *
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>
9 *
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.
13 *
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.
18 *
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
22 * 02110-1301 USA
23 *
24 */
25
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-audio.h>
32#include <linux/input.h>
33#include <linux/slab.h>
34
35/* MODULE ID2 */
36#define LEDEN 0x00
37
38/* ForceFeedback */
39#define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
40
41struct vibra_info {
42 struct device *dev;
43 struct input_dev *input_dev;
44
45 struct workqueue_struct *workqueue;
46 struct work_struct play_work;
47
48 bool enabled;
49 int speed;
50 int direction;
51
52 bool coexist;
53};
54
55static void vibra_disable_leds(void)
56{
57 u8 reg;
58
59 /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
60 twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
61 reg &= ~0x03;
62 twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
63}
64
65/* Powers H-Bridge and enables audio clk */
66static void vibra_enable(struct vibra_info *info)
67{
68 u8 reg;
69
70 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
71
72 /* turn H-Bridge on */
73 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
74 ®, TWL4030_REG_VIBRA_CTL);
75 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
76 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
77
78 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
79
80 info->enabled = true;
81}
82
83static void vibra_disable(struct vibra_info *info)
84{
85 u8 reg;
86
87 /* Power down H-Bridge */
88 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
89 ®, TWL4030_REG_VIBRA_CTL);
90 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
91 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
92
93 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
94 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
95
96 info->enabled = false;
97}
98
99static void vibra_play_work(struct work_struct *work)
100{
101 struct vibra_info *info = container_of(work,
102 struct vibra_info, play_work);
103 int dir;
104 int pwm;
105 u8 reg;
106
107 dir = info->direction;
108 pwm = info->speed;
109
110 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
111 ®, TWL4030_REG_VIBRA_CTL);
112 if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
113
114 if (!info->enabled)
115 vibra_enable(info);
116
117 /* set vibra rotation direction */
118 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
119 ®, TWL4030_REG_VIBRA_CTL);
120 reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
121 (reg & ~TWL4030_VIBRA_DIR);
122 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
123 reg, TWL4030_REG_VIBRA_CTL);
124
125 /* set PWM, 1 = max, 255 = min */
126 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
127 256 - pwm, TWL4030_REG_VIBRA_SET);
128 } else {
129 if (info->enabled)
130 vibra_disable(info);
131 }
132}
133
134/*** Input/ForceFeedback ***/
135
136static int vibra_play(struct input_dev *input, void *data,
137 struct ff_effect *effect)
138{
139 struct vibra_info *info = input_get_drvdata(input);
140
141 info->speed = effect->u.rumble.strong_magnitude >> 8;
142 if (!info->speed)
143 info->speed = effect->u.rumble.weak_magnitude >> 9;
144 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
145 queue_work(info->workqueue, &info->play_work);
146 return 0;
147}
148
149static int twl4030_vibra_open(struct input_dev *input)
150{
151 struct vibra_info *info = input_get_drvdata(input);
152
153 info->workqueue = create_singlethread_workqueue("vibra");
154 if (info->workqueue == NULL) {
155 dev_err(&input->dev, "couldn't create workqueue\n");
156 return -ENOMEM;
157 }
158 return 0;
159}
160
161static void twl4030_vibra_close(struct input_dev *input)
162{
163 struct vibra_info *info = input_get_drvdata(input);
164
165 cancel_work_sync(&info->play_work);
166 INIT_WORK(&info->play_work, vibra_play_work); /* cleanup */
167 destroy_workqueue(info->workqueue);
168 info->workqueue = NULL;
169
170 if (info->enabled)
171 vibra_disable(info);
172}
173
174/*** Module ***/
175#if CONFIG_PM
176static int twl4030_vibra_suspend(struct device *dev)
177{
178 struct platform_device *pdev = to_platform_device(dev);
179 struct vibra_info *info = platform_get_drvdata(pdev);
180
181 if (info->enabled)
182 vibra_disable(info);
183
184 return 0;
185}
186
187static int twl4030_vibra_resume(struct device *dev)
188{
189 vibra_disable_leds();
190 return 0;
191}
192
193static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
194 twl4030_vibra_suspend, twl4030_vibra_resume);
195#endif
196
197static int __devinit twl4030_vibra_probe(struct platform_device *pdev)
198{
199 struct twl4030_vibra_data *pdata = pdev->dev.platform_data;
200 struct vibra_info *info;
201 int ret;
202
203 if (!pdata) {
204 dev_dbg(&pdev->dev, "platform_data not available\n");
205 return -EINVAL;
206 }
207
208 info = kzalloc(sizeof(*info), GFP_KERNEL);
209 if (!info)
210 return -ENOMEM;
211
212 info->dev = &pdev->dev;
213 info->coexist = pdata->coexist;
214 INIT_WORK(&info->play_work, vibra_play_work);
215
216 info->input_dev = input_allocate_device();
217 if (info->input_dev == NULL) {
218 dev_err(&pdev->dev, "couldn't allocate input device\n");
219 ret = -ENOMEM;
220 goto err_kzalloc;
221 }
222
223 input_set_drvdata(info->input_dev, info);
224
225 info->input_dev->name = "twl4030:vibrator";
226 info->input_dev->id.version = 1;
227 info->input_dev->dev.parent = pdev->dev.parent;
228 info->input_dev->open = twl4030_vibra_open;
229 info->input_dev->close = twl4030_vibra_close;
230 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
231
232 ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
233 if (ret < 0) {
234 dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
235 goto err_ialloc;
236 }
237
238 ret = input_register_device(info->input_dev);
239 if (ret < 0) {
240 dev_dbg(&pdev->dev, "couldn't register input device\n");
241 goto err_iff;
242 }
243
244 vibra_disable_leds();
245
246 platform_set_drvdata(pdev, info);
247 return 0;
248
249err_iff:
250 input_ff_destroy(info->input_dev);
251err_ialloc:
252 input_free_device(info->input_dev);
253err_kzalloc:
254 kfree(info);
255 return ret;
256}
257
258static int __devexit twl4030_vibra_remove(struct platform_device *pdev)
259{
260 struct vibra_info *info = platform_get_drvdata(pdev);
261
262 /* this also free ff-memless and calls close if needed */
263 input_unregister_device(info->input_dev);
264 kfree(info);
265 platform_set_drvdata(pdev, NULL);
266
267 return 0;
268}
269
270static struct platform_driver twl4030_vibra_driver = {
271 .probe = twl4030_vibra_probe,
272 .remove = __devexit_p(twl4030_vibra_remove),
273 .driver = {
274 .name = "twl4030-vibra",
275 .owner = THIS_MODULE,
276#ifdef CONFIG_PM
277 .pm = &twl4030_vibra_pm_ops,
278#endif
279 },
280};
281
282static int __init twl4030_vibra_init(void)
283{
284 return platform_driver_register(&twl4030_vibra_driver);
285}
286module_init(twl4030_vibra_init);
287
288static void __exit twl4030_vibra_exit(void)
289{
290 platform_driver_unregister(&twl4030_vibra_driver);
291}
292module_exit(twl4030_vibra_exit);
293
294MODULE_ALIAS("platform:twl4030-vibra");
295
296MODULE_DESCRIPTION("TWL4030 Vibra driver");
297MODULE_LICENSE("GPL");
298MODULE_AUTHOR("Nokia Corporation");
1/*
2 * twl4030-vibra.c - TWL4030 Vibrator driver
3 *
4 * Copyright (C) 2008-2010 Nokia Corporation
5 *
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>
9 *
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.
13 *
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.
18 *
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
22 * 02110-1301 USA
23 *
24 */
25
26#include <linux/module.h>
27#include <linux/jiffies.h>
28#include <linux/platform_device.h>
29#include <linux/of.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>
35
36/* MODULE ID2 */
37#define LEDEN 0x00
38
39/* ForceFeedback */
40#define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
41
42struct vibra_info {
43 struct device *dev;
44 struct input_dev *input_dev;
45
46 struct work_struct play_work;
47
48 bool enabled;
49 int speed;
50 int direction;
51
52 bool coexist;
53};
54
55static void vibra_disable_leds(void)
56{
57 u8 reg;
58
59 /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
60 twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
61 reg &= ~0x03;
62 twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
63}
64
65/* Powers H-Bridge and enables audio clk */
66static void vibra_enable(struct vibra_info *info)
67{
68 u8 reg;
69
70 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_POWER);
71
72 /* turn H-Bridge on */
73 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
74 ®, TWL4030_REG_VIBRA_CTL);
75 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
76 (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
77
78 twl4030_audio_enable_resource(TWL4030_AUDIO_RES_APLL);
79
80 info->enabled = true;
81}
82
83static void vibra_disable(struct vibra_info *info)
84{
85 u8 reg;
86
87 /* Power down H-Bridge */
88 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
89 ®, TWL4030_REG_VIBRA_CTL);
90 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
91 (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
92
93 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_APLL);
94 twl4030_audio_disable_resource(TWL4030_AUDIO_RES_POWER);
95
96 info->enabled = false;
97}
98
99static void vibra_play_work(struct work_struct *work)
100{
101 struct vibra_info *info = container_of(work,
102 struct vibra_info, play_work);
103 int dir;
104 int pwm;
105 u8 reg;
106
107 dir = info->direction;
108 pwm = info->speed;
109
110 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
111 ®, TWL4030_REG_VIBRA_CTL);
112 if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
113
114 if (!info->enabled)
115 vibra_enable(info);
116
117 /* set vibra rotation direction */
118 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
119 ®, TWL4030_REG_VIBRA_CTL);
120 reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
121 (reg & ~TWL4030_VIBRA_DIR);
122 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
123 reg, TWL4030_REG_VIBRA_CTL);
124
125 /* set PWM, 1 = max, 255 = min */
126 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
127 256 - pwm, TWL4030_REG_VIBRA_SET);
128 } else {
129 if (info->enabled)
130 vibra_disable(info);
131 }
132}
133
134/*** Input/ForceFeedback ***/
135
136static int vibra_play(struct input_dev *input, void *data,
137 struct ff_effect *effect)
138{
139 struct vibra_info *info = input_get_drvdata(input);
140
141 info->speed = effect->u.rumble.strong_magnitude >> 8;
142 if (!info->speed)
143 info->speed = effect->u.rumble.weak_magnitude >> 9;
144 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
145 schedule_work(&info->play_work);
146 return 0;
147}
148
149static void twl4030_vibra_close(struct input_dev *input)
150{
151 struct vibra_info *info = input_get_drvdata(input);
152
153 cancel_work_sync(&info->play_work);
154
155 if (info->enabled)
156 vibra_disable(info);
157}
158
159/*** Module ***/
160static int __maybe_unused twl4030_vibra_suspend(struct device *dev)
161{
162 struct platform_device *pdev = to_platform_device(dev);
163 struct vibra_info *info = platform_get_drvdata(pdev);
164
165 if (info->enabled)
166 vibra_disable(info);
167
168 return 0;
169}
170
171static int __maybe_unused twl4030_vibra_resume(struct device *dev)
172{
173 vibra_disable_leds();
174 return 0;
175}
176
177static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
178 twl4030_vibra_suspend, twl4030_vibra_resume);
179
180static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
181 struct device_node *node)
182{
183 if (pdata && pdata->coexist)
184 return true;
185
186 node = of_find_node_by_name(node, "codec");
187 if (node) {
188 of_node_put(node);
189 return true;
190 }
191
192 return false;
193}
194
195static int twl4030_vibra_probe(struct platform_device *pdev)
196{
197 struct twl4030_vibra_data *pdata = dev_get_platdata(&pdev->dev);
198 struct device_node *twl4030_core_node = pdev->dev.parent->of_node;
199 struct vibra_info *info;
200 int ret;
201
202 if (!pdata && !twl4030_core_node) {
203 dev_dbg(&pdev->dev, "platform_data not available\n");
204 return -EINVAL;
205 }
206
207 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
208 if (!info)
209 return -ENOMEM;
210
211 info->dev = &pdev->dev;
212 info->coexist = twl4030_vibra_check_coexist(pdata, twl4030_core_node);
213 INIT_WORK(&info->play_work, vibra_play_work);
214
215 info->input_dev = devm_input_allocate_device(&pdev->dev);
216 if (info->input_dev == NULL) {
217 dev_err(&pdev->dev, "couldn't allocate input device\n");
218 return -ENOMEM;
219 }
220
221 input_set_drvdata(info->input_dev, info);
222
223 info->input_dev->name = "twl4030:vibrator";
224 info->input_dev->id.version = 1;
225 info->input_dev->close = twl4030_vibra_close;
226 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
227
228 ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
229 if (ret < 0) {
230 dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
231 return ret;
232 }
233
234 ret = input_register_device(info->input_dev);
235 if (ret < 0) {
236 dev_dbg(&pdev->dev, "couldn't register input device\n");
237 goto err_iff;
238 }
239
240 vibra_disable_leds();
241
242 platform_set_drvdata(pdev, info);
243 return 0;
244
245err_iff:
246 input_ff_destroy(info->input_dev);
247 return ret;
248}
249
250static struct platform_driver twl4030_vibra_driver = {
251 .probe = twl4030_vibra_probe,
252 .driver = {
253 .name = "twl4030-vibra",
254 .pm = &twl4030_vibra_pm_ops,
255 },
256};
257module_platform_driver(twl4030_vibra_driver);
258
259MODULE_ALIAS("platform:twl4030-vibra");
260MODULE_DESCRIPTION("TWL4030 Vibra driver");
261MODULE_LICENSE("GPL");
262MODULE_AUTHOR("Nokia Corporation");