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14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/of.h>
17#include <linux/workqueue.h>
18#include <linux/input.h>
19#include <linux/mfd/twl6040.h>
20#include <linux/slab.h>
21#include <linux/delay.h>
22#include <linux/regulator/consumer.h>
23
24#define EFFECT_DIR_180_DEG 0x8000
25
26
27#define TWL6040_VIBRA_MOD 85
28
29#define TWL6040_NUM_SUPPLIES 2
30
31struct vibra_info {
32 struct device *dev;
33 struct input_dev *input_dev;
34 struct work_struct play_work;
35
36 int irq;
37
38 bool enabled;
39 int weak_speed;
40 int strong_speed;
41 int direction;
42
43 unsigned int vibldrv_res;
44 unsigned int vibrdrv_res;
45 unsigned int viblmotor_res;
46 unsigned int vibrmotor_res;
47
48 struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
49
50 struct twl6040 *twl6040;
51};
52
53static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
54{
55 struct vibra_info *info = data;
56 struct twl6040 *twl6040 = info->twl6040;
57 u8 status;
58
59 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
60 if (status & TWL6040_VIBLOCDET) {
61 dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
62 twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
63 TWL6040_VIBENA);
64 }
65 if (status & TWL6040_VIBROCDET) {
66 dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
67 twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
68 TWL6040_VIBENA);
69 }
70
71 return IRQ_HANDLED;
72}
73
74static void twl6040_vibra_enable(struct vibra_info *info)
75{
76 struct twl6040 *twl6040 = info->twl6040;
77 int ret;
78
79 ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
80 if (ret) {
81 dev_err(info->dev, "failed to enable regulators %d\n", ret);
82 return;
83 }
84
85 twl6040_power(info->twl6040, 1);
86 if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
87
88
89
90
91
92 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
93 TWL6040_VIBENA | TWL6040_VIBCTRL);
94 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
95 TWL6040_VIBENA | TWL6040_VIBCTRL);
96 usleep_range(3000, 3500);
97 }
98
99 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
100 TWL6040_VIBENA);
101 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
102 TWL6040_VIBENA);
103
104 info->enabled = true;
105}
106
107static void twl6040_vibra_disable(struct vibra_info *info)
108{
109 struct twl6040 *twl6040 = info->twl6040;
110
111 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
112 twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
113 twl6040_power(info->twl6040, 0);
114
115 regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
116
117 info->enabled = false;
118}
119
120static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
121 int speed, int direction)
122{
123 int vpk, max_code;
124 u8 vibdat;
125
126
127 vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
128 (100 * (vibdrv_res + motor_res));
129
130
131 max_code = vpk / 50;
132 if (max_code > TWL6040_VIBDAT_MAX)
133 max_code = TWL6040_VIBDAT_MAX;
134
135
136 vibdat = (u8)((speed * max_code) / USHRT_MAX);
137
138
139 vibdat *= direction;
140
141 return vibdat;
142}
143
144static void twl6040_vibra_set_effect(struct vibra_info *info)
145{
146 struct twl6040 *twl6040 = info->twl6040;
147 u8 vibdatl, vibdatr;
148 int volt;
149
150
151 volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
152 vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
153 info->viblmotor_res,
154 info->weak_speed, info->direction);
155
156
157 volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
158 vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
159 info->vibrmotor_res,
160 info->strong_speed, info->direction);
161
162 twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
163 twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
164}
165
166static void vibra_play_work(struct work_struct *work)
167{
168 struct vibra_info *info = container_of(work,
169 struct vibra_info, play_work);
170 int ret;
171
172
173 ret = twl6040_get_vibralr_status(info->twl6040);
174 if (ret & TWL6040_VIBSEL) {
175 dev_info(info->dev, "Vibra is configured for audio\n");
176 return;
177 }
178
179 if (info->weak_speed || info->strong_speed) {
180 if (!info->enabled)
181 twl6040_vibra_enable(info);
182
183 twl6040_vibra_set_effect(info);
184 } else if (info->enabled)
185 twl6040_vibra_disable(info);
186
187}
188
189static int vibra_play(struct input_dev *input, void *data,
190 struct ff_effect *effect)
191{
192 struct vibra_info *info = input_get_drvdata(input);
193
194 info->weak_speed = effect->u.rumble.weak_magnitude;
195 info->strong_speed = effect->u.rumble.strong_magnitude;
196 info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
197
198 schedule_work(&info->play_work);
199
200 return 0;
201}
202
203static void twl6040_vibra_close(struct input_dev *input)
204{
205 struct vibra_info *info = input_get_drvdata(input);
206
207 cancel_work_sync(&info->play_work);
208
209 if (info->enabled)
210 twl6040_vibra_disable(info);
211}
212
213static int __maybe_unused twl6040_vibra_suspend(struct device *dev)
214{
215 struct platform_device *pdev = to_platform_device(dev);
216 struct vibra_info *info = platform_get_drvdata(pdev);
217
218 cancel_work_sync(&info->play_work);
219
220 if (info->enabled)
221 twl6040_vibra_disable(info);
222
223 return 0;
224}
225
226static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
227
228static int twl6040_vibra_probe(struct platform_device *pdev)
229{
230 struct device *twl6040_core_dev = pdev->dev.parent;
231 struct device_node *twl6040_core_node;
232 struct vibra_info *info;
233 int vddvibl_uV = 0;
234 int vddvibr_uV = 0;
235 int error;
236
237 twl6040_core_node = of_get_child_by_name(twl6040_core_dev->of_node,
238 "vibra");
239 if (!twl6040_core_node) {
240 dev_err(&pdev->dev, "parent of node is missing?\n");
241 return -EINVAL;
242 }
243
244 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
245 if (!info) {
246 of_node_put(twl6040_core_node);
247 dev_err(&pdev->dev, "couldn't allocate memory\n");
248 return -ENOMEM;
249 }
250
251 info->dev = &pdev->dev;
252
253 info->twl6040 = dev_get_drvdata(pdev->dev.parent);
254
255 of_property_read_u32(twl6040_core_node, "ti,vibldrv-res",
256 &info->vibldrv_res);
257 of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res",
258 &info->vibrdrv_res);
259 of_property_read_u32(twl6040_core_node, "ti,viblmotor-res",
260 &info->viblmotor_res);
261 of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res",
262 &info->vibrmotor_res);
263 of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV", &vddvibl_uV);
264 of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV", &vddvibr_uV);
265
266 of_node_put(twl6040_core_node);
267
268 if ((!info->vibldrv_res && !info->viblmotor_res) ||
269 (!info->vibrdrv_res && !info->vibrmotor_res)) {
270 dev_err(info->dev, "invalid vibra driver/motor resistance\n");
271 return -EINVAL;
272 }
273
274 info->irq = platform_get_irq(pdev, 0);
275 if (info->irq < 0)
276 return -EINVAL;
277
278 error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
279 twl6040_vib_irq_handler,
280 IRQF_ONESHOT,
281 "twl6040_irq_vib", info);
282 if (error) {
283 dev_err(info->dev, "VIB IRQ request failed: %d\n", error);
284 return error;
285 }
286
287 info->supplies[0].supply = "vddvibl";
288 info->supplies[1].supply = "vddvibr";
289
290
291
292
293 error = devm_regulator_bulk_get(twl6040_core_dev,
294 ARRAY_SIZE(info->supplies),
295 info->supplies);
296 if (error) {
297 dev_err(info->dev, "couldn't get regulators %d\n", error);
298 return error;
299 }
300
301 if (vddvibl_uV) {
302 error = regulator_set_voltage(info->supplies[0].consumer,
303 vddvibl_uV, vddvibl_uV);
304 if (error) {
305 dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
306 error);
307 return error;
308 }
309 }
310
311 if (vddvibr_uV) {
312 error = regulator_set_voltage(info->supplies[1].consumer,
313 vddvibr_uV, vddvibr_uV);
314 if (error) {
315 dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
316 error);
317 return error;
318 }
319 }
320
321 INIT_WORK(&info->play_work, vibra_play_work);
322
323 info->input_dev = devm_input_allocate_device(&pdev->dev);
324 if (!info->input_dev) {
325 dev_err(info->dev, "couldn't allocate input device\n");
326 return -ENOMEM;
327 }
328
329 input_set_drvdata(info->input_dev, info);
330
331 info->input_dev->name = "twl6040:vibrator";
332 info->input_dev->id.version = 1;
333 info->input_dev->close = twl6040_vibra_close;
334 __set_bit(FF_RUMBLE, info->input_dev->ffbit);
335
336 error = input_ff_create_memless(info->input_dev, NULL, vibra_play);
337 if (error) {
338 dev_err(info->dev, "couldn't register vibrator to FF\n");
339 return error;
340 }
341
342 error = input_register_device(info->input_dev);
343 if (error) {
344 dev_err(info->dev, "couldn't register input device\n");
345 return error;
346 }
347
348 platform_set_drvdata(pdev, info);
349
350 return 0;
351}
352
353static struct platform_driver twl6040_vibra_driver = {
354 .probe = twl6040_vibra_probe,
355 .driver = {
356 .name = "twl6040-vibra",
357 .pm = &twl6040_vibra_pm_ops,
358 },
359};
360module_platform_driver(twl6040_vibra_driver);
361
362MODULE_ALIAS("platform:twl6040-vibra");
363MODULE_DESCRIPTION("TWL6040 Vibra driver");
364MODULE_LICENSE("GPL");
365MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
366MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
367
