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28#include <linux/module.h>
29#include <linux/platform_device.h>
30#include <linux/of.h>
31#include <linux/workqueue.h>
32#include <linux/input.h>
33#include <linux/mfd/twl6040.h>
34#include <linux/slab.h>
35#include <linux/delay.h>
36#include <linux/regulator/consumer.h>
37
38#define EFFECT_DIR_180_DEG 0x8000
39
40
41#define TWL6040_VIBRA_MOD 85
42
43#define TWL6040_NUM_SUPPLIES 2
44
45struct vibra_info {
46 struct device *dev;
47 struct input_dev *input_dev;
48 struct workqueue_struct *workqueue;
49 struct work_struct play_work;
50 struct mutex mutex;
51 int irq;
52
53 bool enabled;
54 int weak_speed;
55 int strong_speed;
56 int direction;
57
58 unsigned int vibldrv_res;
59 unsigned int vibrdrv_res;
60 unsigned int viblmotor_res;
61 unsigned int vibrmotor_res;
62
63 struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
64
65 struct twl6040 *twl6040;
66};
67
68static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
69{
70 struct vibra_info *info = data;
71 struct twl6040 *twl6040 = info->twl6040;
72 u8 status;
73
74 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
75 if (status & TWL6040_VIBLOCDET) {
76 dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
77 twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
78 TWL6040_VIBENA);
79 }
80 if (status & TWL6040_VIBROCDET) {
81 dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
82 twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
83 TWL6040_VIBENA);
84 }
85
86 return IRQ_HANDLED;
87}
88
89static void twl6040_vibra_enable(struct vibra_info *info)
90{
91 struct twl6040 *twl6040 = info->twl6040;
92 int ret;
93
94 ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
95 if (ret) {
96 dev_err(info->dev, "failed to enable regulators %d\n", ret);
97 return;
98 }
99
100 twl6040_power(info->twl6040, 1);
101 if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
102
103
104
105
106
107 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
108 TWL6040_VIBENA | TWL6040_VIBCTRL);
109 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
110 TWL6040_VIBENA | TWL6040_VIBCTRL);
111 usleep_range(3000, 3500);
112 }
113
114 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
115 TWL6040_VIBENA);
116 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
117 TWL6040_VIBENA);
118
119 info->enabled = true;
120}
121
122static void twl6040_vibra_disable(struct vibra_info *info)
123{
124 struct twl6040 *twl6040 = info->twl6040;
125
126 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
127 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
128 twl6040_power(info->twl6040, 0);
129
130 regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
131
132 info->enabled = false;
133}
134
135static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
136 int speed, int direction)
137{
138 int vpk, max_code;
139 u8 vibdat;
140
141
142 vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
143 (100 * (vibdrv_res + motor_res));
144
145
146 max_code = vpk / 50;
147 if (max_code > TWL6040_VIBDAT_MAX)
148 max_code = TWL6040_VIBDAT_MAX;
149
150
151 vibdat = (u8)((speed * max_code) / USHRT_MAX);
152
153
154 vibdat *= direction;
155
156 return vibdat;
157}
158
159static void twl6040_vibra_set_effect(struct vibra_info *info)
160{
161 struct twl6040 *twl6040 = info->twl6040;
162 u8 vibdatl, vibdatr;
163 int volt;
164
165
166 volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
167 vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
168 info->viblmotor_res,
169 info->weak_speed, info->direction);
170
171
172 volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
173 vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
174 info->vibrmotor_res,
175 info->strong_speed, info->direction);
176
177 twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
178 twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
179}
180
181static void vibra_play_work(struct work_struct *work)
182{
183 struct vibra_info *info = container_of(work,
184 struct vibra_info, play_work);
185
186 mutex_lock(&info->mutex);
187
188 if (info->weak_speed || info->strong_speed) {
189 if (!info->enabled)
190 twl6040_vibra_enable(info);
191
192 twl6040_vibra_set_effect(info);
193 } else if (info->enabled)
194 twl6040_vibra_disable(info);
195
196 mutex_unlock(&info->mutex);
197}
198
199static int vibra_play(struct input_dev *input, void *data,
200 struct ff_effect *effect)
201{
202 struct vibra_info *info = input_get_drvdata(input);
203 int ret;
204
205
206 ret = twl6040_get_vibralr_status(info->twl6040);
207 if (ret & TWL6040_VIBSEL) {
208 dev_info(&input->dev, "Vibra is configured for audio\n");
209 return -EBUSY;
210 }
211
212 info->weak_speed = effect->u.rumble.weak_magnitude;
213 info->strong_speed = effect->u.rumble.strong_magnitude;
214 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
215
216 ret = queue_work(info->workqueue, &info->play_work);
217 if (!ret) {
218 dev_info(&input->dev, "work is already on queue\n");
219 return ret;
220 }
221
222 return 0;
223}
224
225static void twl6040_vibra_close(struct input_dev *input)
226{
227 struct vibra_info *info = input_get_drvdata(input);
228
229 cancel_work_sync(&info->play_work);
230
231 mutex_lock(&info->mutex);
232
233 if (info->enabled)
234 twl6040_vibra_disable(info);
235
236 mutex_unlock(&info->mutex);
237}
238
239#ifdef CONFIG_PM_SLEEP
240static int twl6040_vibra_suspend(struct device *dev)
241{
242 struct platform_device *pdev = to_platform_device(dev);
243 struct vibra_info *info = platform_get_drvdata(pdev);
244
245 mutex_lock(&info->mutex);
246
247 if (info->enabled)
248 twl6040_vibra_disable(info);
249
250 mutex_unlock(&info->mutex);
251
252 return 0;
253}
254
255#endif
256
257static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
258
259static int __devinit twl6040_vibra_probe(struct platform_device *pdev)
260{
261 struct twl6040_vibra_data *pdata = pdev->dev.platform_data;
262 struct device_node *node = pdev->dev.of_node;
263 struct vibra_info *info;
264 int vddvibl_uV = 0;
265 int vddvibr_uV = 0;
266 int ret;
267
268 if (!pdata && !node) {
269 dev_err(&pdev->dev, "platform_data not available\n");
270 return -EINVAL;
271 }
272
273 info = kzalloc(sizeof(*info), GFP_KERNEL);
274 if (!info) {
275 dev_err(&pdev->dev, "couldn't allocate memory\n");
276 return -ENOMEM;
277 }
278
279 info->dev = &pdev->dev;
280
281 info->twl6040 = dev_get_drvdata(pdev->dev.parent);
282 if (pdata) {
283 info->vibldrv_res = pdata->vibldrv_res;
284 info->vibrdrv_res = pdata->vibrdrv_res;
285 info->viblmotor_res = pdata->viblmotor_res;
286 info->vibrmotor_res = pdata->vibrmotor_res;
287 vddvibl_uV = pdata->vddvibl_uV;
288 vddvibr_uV = pdata->vddvibr_uV;
289 } else {
290 of_property_read_u32(node, "vibldrv_res", &info->vibldrv_res);
291 of_property_read_u32(node, "vibrdrv_res", &info->vibrdrv_res);
292 of_property_read_u32(node, "viblmotor_res",
293 &info->viblmotor_res);
294 of_property_read_u32(node, "vibrmotor_res",
295 &info->vibrmotor_res);
296 of_property_read_u32(node, "vddvibl_uV", &vddvibl_uV);
297 of_property_read_u32(node, "vddvibr_uV", &vddvibr_uV);
298 }
299
300 if ((!info->vibldrv_res && !info->viblmotor_res) ||
301 (!info->vibrdrv_res && !info->vibrmotor_res)) {
302 dev_err(info->dev, "invalid vibra driver/motor resistance\n");
303 ret = -EINVAL;
304 goto err_kzalloc;
305 }
306
307 info->irq = platform_get_irq(pdev, 0);
308 if (info->irq < 0) {
309 dev_err(info->dev, "invalid irq\n");
310 ret = -EINVAL;
311 goto err_kzalloc;
312 }
313
314 mutex_init(&info->mutex);
315
316 info->input_dev = input_allocate_device();
317 if (info->input_dev == NULL) {
318 dev_err(info->dev, "couldn't allocate input device\n");
319 ret = -ENOMEM;
320 goto err_kzalloc;
321 }
322
323 input_set_drvdata(info->input_dev, info);
324
325 info->input_dev->name = "twl6040:vibrator";
326 info->input_dev->id.version = 1;
327 info->input_dev->dev.parent = pdev->dev.parent;
328 info->input_dev->close = twl6040_vibra_close;
329 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
330
331 ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
332 if (ret < 0) {
333 dev_err(info->dev, "couldn't register vibrator to FF\n");
334 goto err_ialloc;
335 }
336
337 ret = input_register_device(info->input_dev);
338 if (ret < 0) {
339 dev_err(info->dev, "couldn't register input device\n");
340 goto err_iff;
341 }
342
343 platform_set_drvdata(pdev, info);
344
345 ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
346 "twl6040_irq_vib", info);
347 if (ret) {
348 dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
349 goto err_irq;
350 }
351
352 info->supplies[0].supply = "vddvibl";
353 info->supplies[1].supply = "vddvibr";
354 ret = regulator_bulk_get(info->dev, ARRAY_SIZE(info->supplies),
355 info->supplies);
356 if (ret) {
357 dev_err(info->dev, "couldn't get regulators %d\n", ret);
358 goto err_regulator;
359 }
360
361 if (vddvibl_uV) {
362 ret = regulator_set_voltage(info->supplies[0].consumer,
363 vddvibl_uV, vddvibl_uV);
364 if (ret) {
365 dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
366 ret);
367 goto err_voltage;
368 }
369 }
370
371 if (vddvibr_uV) {
372 ret = regulator_set_voltage(info->supplies[1].consumer,
373 vddvibr_uV, vddvibr_uV);
374 if (ret) {
375 dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
376 ret);
377 goto err_voltage;
378 }
379 }
380
381 info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0);
382 if (info->workqueue == NULL) {
383 dev_err(info->dev, "couldn't create workqueue\n");
384 ret = -ENOMEM;
385 goto err_voltage;
386 }
387 INIT_WORK(&info->play_work, vibra_play_work);
388
389 return 0;
390
391err_voltage:
392 regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
393err_regulator:
394 free_irq(info->irq, info);
395err_irq:
396 input_unregister_device(info->input_dev);
397 info->input_dev = NULL;
398err_iff:
399 if (info->input_dev)
400 input_ff_destroy(info->input_dev);
401err_ialloc:
402 input_free_device(info->input_dev);
403err_kzalloc:
404 kfree(info);
405 return ret;
406}
407
408static int __devexit twl6040_vibra_remove(struct platform_device *pdev)
409{
410 struct vibra_info *info = platform_get_drvdata(pdev);
411
412 input_unregister_device(info->input_dev);
413 free_irq(info->irq, info);
414 regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
415 destroy_workqueue(info->workqueue);
416 kfree(info);
417
418 return 0;
419}
420
421static const struct of_device_id twl6040_vibra_of_match[] = {
422 {.compatible = "ti,twl6040-vibra", },
423 { },
424};
425MODULE_DEVICE_TABLE(of, twl6040_vibra_of_match);
426
427static struct platform_driver twl6040_vibra_driver = {
428 .probe = twl6040_vibra_probe,
429 .remove = __devexit_p(twl6040_vibra_remove),
430 .driver = {
431 .name = "twl6040-vibra",
432 .owner = THIS_MODULE,
433 .pm = &twl6040_vibra_pm_ops,
434 .of_match_table = twl6040_vibra_of_match,
435 },
436};
437module_platform_driver(twl6040_vibra_driver);
438
439MODULE_ALIAS("platform:twl6040-vibra");
440MODULE_DESCRIPTION("TWL6040 Vibra driver");
441MODULE_LICENSE("GPL");
442MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
443MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
444
