Commit | Line | Data |
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cc697d38 MLC |
1 | /* |
2 | * twl6040-vibra.c - TWL6040 Vibrator driver | |
3 | * | |
4 | * Author: Jorge Eduardo Candelaria <jorge.candelaria@ti.com> | |
5 | * Author: Misael Lopez Cruz <misael.lopez@ti.com> | |
6 | * | |
7 | * Copyright: (C) 2011 Texas Instruments, Inc. | |
8 | * | |
9 | * Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com> | |
10 | * Felipe Balbi <felipe.balbi@nokia.com> | |
11 | * Jari Vanhala <ext-javi.vanhala@nokia.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
25 | * 02110-1301 USA | |
26 | * | |
27 | */ | |
28 | #include <linux/module.h> | |
29 | #include <linux/platform_device.h> | |
9ac7b1a3 | 30 | #include <linux/of.h> |
cc697d38 | 31 | #include <linux/workqueue.h> |
8eaeb939 | 32 | #include <linux/input.h> |
cc697d38 MLC |
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 | /* Recommended modulation index 85% */ | |
41 | #define TWL6040_VIBRA_MOD 85 | |
42 | ||
43 | #define TWL6040_NUM_SUPPLIES 2 | |
44 | ||
45 | struct 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; | |
625cbe46 | 51 | int irq; |
cc697d38 MLC |
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 | ||
68 | static 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, | |
1e036f65 | 78 | TWL6040_VIBENA); |
cc697d38 MLC |
79 | } |
80 | if (status & TWL6040_VIBROCDET) { | |
81 | dev_warn(info->dev, "Right Vibrator overcurrent detected\n"); | |
82 | twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR, | |
1e036f65 | 83 | TWL6040_VIBENA); |
cc697d38 MLC |
84 | } |
85 | ||
86 | return IRQ_HANDLED; | |
87 | } | |
88 | ||
89 | static 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); | |
7e968985 | 101 | if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) { |
cc697d38 MLC |
102 | /* |
103 | * ERRATA: Disable overcurrent protection for at least | |
104 | * 3ms when enabling vibrator drivers to avoid false | |
105 | * overcurrent detection | |
106 | */ | |
107 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, | |
1e036f65 | 108 | TWL6040_VIBENA | TWL6040_VIBCTRL); |
cc697d38 | 109 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
1e036f65 | 110 | TWL6040_VIBENA | TWL6040_VIBCTRL); |
cc697d38 MLC |
111 | usleep_range(3000, 3500); |
112 | } | |
113 | ||
114 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, | |
1e036f65 | 115 | TWL6040_VIBENA); |
cc697d38 | 116 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
1e036f65 | 117 | TWL6040_VIBENA); |
cc697d38 MLC |
118 | |
119 | info->enabled = true; | |
120 | } | |
121 | ||
122 | static 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 | ||
135 | static 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 | /* output swing */ | |
142 | vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) / | |
143 | (100 * (vibdrv_res + motor_res)); | |
144 | ||
145 | /* 50mV per VIBDAT code step */ | |
146 | max_code = vpk / 50; | |
147 | if (max_code > TWL6040_VIBDAT_MAX) | |
148 | max_code = TWL6040_VIBDAT_MAX; | |
149 | ||
150 | /* scale speed to max allowed code */ | |
151 | vibdat = (u8)((speed * max_code) / USHRT_MAX); | |
152 | ||
153 | /* 2's complement for direction > 180 degrees */ | |
154 | vibdat *= direction; | |
155 | ||
156 | return vibdat; | |
157 | } | |
158 | ||
159 | static 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 | /* weak motor */ | |
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 | /* strong motor */ | |
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 | ||
181 | static 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 | ||
199 | static 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 | ||
5f07c32e PU |
205 | /* Do not allow effect, while the routing is set to use audio */ |
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 | ||
cc697d38 MLC |
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 | ||
225 | static 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 | ||
97a652a8 | 239 | static int __maybe_unused twl6040_vibra_suspend(struct device *dev) |
cc697d38 MLC |
240 | { |
241 | struct platform_device *pdev = to_platform_device(dev); | |
242 | struct vibra_info *info = platform_get_drvdata(pdev); | |
243 | ||
244 | mutex_lock(&info->mutex); | |
245 | ||
246 | if (info->enabled) | |
247 | twl6040_vibra_disable(info); | |
248 | ||
249 | mutex_unlock(&info->mutex); | |
250 | ||
251 | return 0; | |
252 | } | |
cc697d38 MLC |
253 | |
254 | static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL); | |
255 | ||
5298cc4c | 256 | static int twl6040_vibra_probe(struct platform_device *pdev) |
cc697d38 | 257 | { |
e7ec014a | 258 | struct device *twl6040_core_dev = pdev->dev.parent; |
32e573c4 | 259 | struct device_node *twl6040_core_node; |
cc697d38 | 260 | struct vibra_info *info; |
9ac7b1a3 PU |
261 | int vddvibl_uV = 0; |
262 | int vddvibr_uV = 0; | |
1f9e1470 | 263 | int error; |
cc697d38 | 264 | |
e7ec014a PU |
265 | twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node, |
266 | "vibra"); | |
7bf2a98a PU |
267 | if (!twl6040_core_node) { |
268 | dev_err(&pdev->dev, "parent of node is missing?\n"); | |
cc697d38 MLC |
269 | return -EINVAL; |
270 | } | |
271 | ||
b2ebcc1b | 272 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
cc697d38 | 273 | if (!info) { |
f048dd17 | 274 | of_node_put(twl6040_core_node); |
cc697d38 MLC |
275 | dev_err(&pdev->dev, "couldn't allocate memory\n"); |
276 | return -ENOMEM; | |
277 | } | |
278 | ||
279 | info->dev = &pdev->dev; | |
9ac7b1a3 | 280 | |
cc697d38 | 281 | info->twl6040 = dev_get_drvdata(pdev->dev.parent); |
7bf2a98a PU |
282 | |
283 | of_property_read_u32(twl6040_core_node, "ti,vibldrv-res", | |
284 | &info->vibldrv_res); | |
285 | of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res", | |
286 | &info->vibrdrv_res); | |
287 | of_property_read_u32(twl6040_core_node, "ti,viblmotor-res", | |
288 | &info->viblmotor_res); | |
289 | of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res", | |
290 | &info->vibrmotor_res); | |
291 | of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV", &vddvibl_uV); | |
292 | of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV", &vddvibr_uV); | |
9ac7b1a3 | 293 | |
f048dd17 LC |
294 | of_node_put(twl6040_core_node); |
295 | ||
cc697d38 MLC |
296 | if ((!info->vibldrv_res && !info->viblmotor_res) || |
297 | (!info->vibrdrv_res && !info->vibrmotor_res)) { | |
298 | dev_err(info->dev, "invalid vibra driver/motor resistance\n"); | |
b2ebcc1b | 299 | return -EINVAL; |
cc697d38 MLC |
300 | } |
301 | ||
625cbe46 PU |
302 | info->irq = platform_get_irq(pdev, 0); |
303 | if (info->irq < 0) { | |
304 | dev_err(info->dev, "invalid irq\n"); | |
b2ebcc1b | 305 | return -EINVAL; |
625cbe46 PU |
306 | } |
307 | ||
cc697d38 MLC |
308 | mutex_init(&info->mutex); |
309 | ||
1f9e1470 | 310 | error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, |
4be01a29 FE |
311 | twl6040_vib_irq_handler, |
312 | IRQF_ONESHOT, | |
1f9e1470 FE |
313 | "twl6040_irq_vib", info); |
314 | if (error) { | |
315 | dev_err(info->dev, "VIB IRQ request failed: %d\n", error); | |
316 | return error; | |
cc697d38 MLC |
317 | } |
318 | ||
319 | info->supplies[0].supply = "vddvibl"; | |
320 | info->supplies[1].supply = "vddvibr"; | |
e7ec014a PU |
321 | /* |
322 | * When booted with Device tree the regulators are attached to the | |
323 | * parent device (twl6040 MFD core) | |
324 | */ | |
1f9e1470 FE |
325 | error = devm_regulator_bulk_get(twl6040_core_dev, |
326 | ARRAY_SIZE(info->supplies), | |
327 | info->supplies); | |
328 | if (error) { | |
329 | dev_err(info->dev, "couldn't get regulators %d\n", error); | |
330 | return error; | |
cc697d38 MLC |
331 | } |
332 | ||
9ac7b1a3 | 333 | if (vddvibl_uV) { |
1f9e1470 FE |
334 | error = regulator_set_voltage(info->supplies[0].consumer, |
335 | vddvibl_uV, vddvibl_uV); | |
336 | if (error) { | |
cc697d38 | 337 | dev_err(info->dev, "failed to set VDDVIBL volt %d\n", |
1f9e1470 FE |
338 | error); |
339 | return error; | |
cc697d38 MLC |
340 | } |
341 | } | |
342 | ||
9ac7b1a3 | 343 | if (vddvibr_uV) { |
1f9e1470 FE |
344 | error = regulator_set_voltage(info->supplies[1].consumer, |
345 | vddvibr_uV, vddvibr_uV); | |
346 | if (error) { | |
cc697d38 | 347 | dev_err(info->dev, "failed to set VDDVIBR volt %d\n", |
1f9e1470 FE |
348 | error); |
349 | return error; | |
cc697d38 MLC |
350 | } |
351 | } | |
352 | ||
cc697d38 MLC |
353 | INIT_WORK(&info->play_work, vibra_play_work); |
354 | ||
1f9e1470 FE |
355 | info->input_dev = devm_input_allocate_device(&pdev->dev); |
356 | if (!info->input_dev) { | |
b2ebcc1b | 357 | dev_err(info->dev, "couldn't allocate input device\n"); |
1f9e1470 | 358 | return -ENOMEM; |
b2ebcc1b PU |
359 | } |
360 | ||
361 | input_set_drvdata(info->input_dev, info); | |
362 | ||
363 | info->input_dev->name = "twl6040:vibrator"; | |
364 | info->input_dev->id.version = 1; | |
365 | info->input_dev->dev.parent = pdev->dev.parent; | |
366 | info->input_dev->close = twl6040_vibra_close; | |
367 | __set_bit(FF_RUMBLE, info->input_dev->ffbit); | |
368 | ||
1f9e1470 FE |
369 | error = input_ff_create_memless(info->input_dev, NULL, vibra_play); |
370 | if (error) { | |
b2ebcc1b | 371 | dev_err(info->dev, "couldn't register vibrator to FF\n"); |
1f9e1470 | 372 | return error; |
b2ebcc1b PU |
373 | } |
374 | ||
1f9e1470 FE |
375 | error = input_register_device(info->input_dev); |
376 | if (error) { | |
b2ebcc1b | 377 | dev_err(info->dev, "couldn't register input device\n"); |
1f9e1470 | 378 | return error; |
b2ebcc1b PU |
379 | } |
380 | ||
381 | platform_set_drvdata(pdev, info); | |
382 | ||
cc697d38 MLC |
383 | return 0; |
384 | } | |
385 | ||
386 | static struct platform_driver twl6040_vibra_driver = { | |
387 | .probe = twl6040_vibra_probe, | |
cc697d38 MLC |
388 | .driver = { |
389 | .name = "twl6040-vibra", | |
cc697d38 MLC |
390 | .pm = &twl6040_vibra_pm_ops, |
391 | }, | |
392 | }; | |
840a746b | 393 | module_platform_driver(twl6040_vibra_driver); |
cc697d38 MLC |
394 | |
395 | MODULE_ALIAS("platform:twl6040-vibra"); | |
396 | MODULE_DESCRIPTION("TWL6040 Vibra driver"); | |
397 | MODULE_LICENSE("GPL"); | |
398 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); | |
399 | MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); |