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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; | |
cc697d38 | 48 | struct work_struct play_work; |
9e4cc255 | 49 | |
625cbe46 | 50 | int irq; |
cc697d38 MLC |
51 | |
52 | bool enabled; | |
53 | int weak_speed; | |
54 | int strong_speed; | |
55 | int direction; | |
56 | ||
57 | unsigned int vibldrv_res; | |
58 | unsigned int vibrdrv_res; | |
59 | unsigned int viblmotor_res; | |
60 | unsigned int vibrmotor_res; | |
61 | ||
62 | struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES]; | |
63 | ||
64 | struct twl6040 *twl6040; | |
65 | }; | |
66 | ||
67 | static irqreturn_t twl6040_vib_irq_handler(int irq, void *data) | |
68 | { | |
69 | struct vibra_info *info = data; | |
70 | struct twl6040 *twl6040 = info->twl6040; | |
71 | u8 status; | |
72 | ||
73 | status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); | |
74 | if (status & TWL6040_VIBLOCDET) { | |
75 | dev_warn(info->dev, "Left Vibrator overcurrent detected\n"); | |
76 | twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL, | |
1e036f65 | 77 | TWL6040_VIBENA); |
cc697d38 MLC |
78 | } |
79 | if (status & TWL6040_VIBROCDET) { | |
80 | dev_warn(info->dev, "Right Vibrator overcurrent detected\n"); | |
81 | twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR, | |
1e036f65 | 82 | TWL6040_VIBENA); |
cc697d38 MLC |
83 | } |
84 | ||
85 | return IRQ_HANDLED; | |
86 | } | |
87 | ||
88 | static void twl6040_vibra_enable(struct vibra_info *info) | |
89 | { | |
90 | struct twl6040 *twl6040 = info->twl6040; | |
91 | int ret; | |
92 | ||
93 | ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies); | |
94 | if (ret) { | |
95 | dev_err(info->dev, "failed to enable regulators %d\n", ret); | |
96 | return; | |
97 | } | |
98 | ||
99 | twl6040_power(info->twl6040, 1); | |
7e968985 | 100 | if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) { |
cc697d38 MLC |
101 | /* |
102 | * ERRATA: Disable overcurrent protection for at least | |
103 | * 3ms when enabling vibrator drivers to avoid false | |
104 | * overcurrent detection | |
105 | */ | |
106 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, | |
1e036f65 | 107 | TWL6040_VIBENA | TWL6040_VIBCTRL); |
cc697d38 | 108 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
1e036f65 | 109 | TWL6040_VIBENA | TWL6040_VIBCTRL); |
cc697d38 MLC |
110 | usleep_range(3000, 3500); |
111 | } | |
112 | ||
113 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, | |
1e036f65 | 114 | TWL6040_VIBENA); |
cc697d38 | 115 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, |
1e036f65 | 116 | TWL6040_VIBENA); |
cc697d38 MLC |
117 | |
118 | info->enabled = true; | |
119 | } | |
120 | ||
121 | static void twl6040_vibra_disable(struct vibra_info *info) | |
122 | { | |
123 | struct twl6040 *twl6040 = info->twl6040; | |
124 | ||
125 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00); | |
126 | twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00); | |
127 | twl6040_power(info->twl6040, 0); | |
128 | ||
129 | regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies); | |
130 | ||
131 | info->enabled = false; | |
132 | } | |
133 | ||
134 | static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res, | |
135 | int speed, int direction) | |
136 | { | |
137 | int vpk, max_code; | |
138 | u8 vibdat; | |
139 | ||
140 | /* output swing */ | |
141 | vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) / | |
142 | (100 * (vibdrv_res + motor_res)); | |
143 | ||
144 | /* 50mV per VIBDAT code step */ | |
145 | max_code = vpk / 50; | |
146 | if (max_code > TWL6040_VIBDAT_MAX) | |
147 | max_code = TWL6040_VIBDAT_MAX; | |
148 | ||
149 | /* scale speed to max allowed code */ | |
150 | vibdat = (u8)((speed * max_code) / USHRT_MAX); | |
151 | ||
152 | /* 2's complement for direction > 180 degrees */ | |
153 | vibdat *= direction; | |
154 | ||
155 | return vibdat; | |
156 | } | |
157 | ||
158 | static void twl6040_vibra_set_effect(struct vibra_info *info) | |
159 | { | |
160 | struct twl6040 *twl6040 = info->twl6040; | |
161 | u8 vibdatl, vibdatr; | |
162 | int volt; | |
163 | ||
164 | /* weak motor */ | |
165 | volt = regulator_get_voltage(info->supplies[0].consumer) / 1000; | |
166 | vibdatl = twl6040_vibra_code(volt, info->vibldrv_res, | |
167 | info->viblmotor_res, | |
168 | info->weak_speed, info->direction); | |
169 | ||
170 | /* strong motor */ | |
171 | volt = regulator_get_voltage(info->supplies[1].consumer) / 1000; | |
172 | vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res, | |
173 | info->vibrmotor_res, | |
174 | info->strong_speed, info->direction); | |
175 | ||
176 | twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl); | |
177 | twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr); | |
178 | } | |
179 | ||
180 | static void vibra_play_work(struct work_struct *work) | |
181 | { | |
182 | struct vibra_info *info = container_of(work, | |
183 | struct vibra_info, play_work); | |
28a994fa NS |
184 | int ret; |
185 | ||
186 | /* Do not allow effect, while the routing is set to use audio */ | |
187 | ret = twl6040_get_vibralr_status(info->twl6040); | |
188 | if (ret & TWL6040_VIBSEL) { | |
189 | dev_info(info->dev, "Vibra is configured for audio\n"); | |
190 | return; | |
191 | } | |
cc697d38 | 192 | |
cc697d38 MLC |
193 | if (info->weak_speed || info->strong_speed) { |
194 | if (!info->enabled) | |
195 | twl6040_vibra_enable(info); | |
196 | ||
197 | twl6040_vibra_set_effect(info); | |
198 | } else if (info->enabled) | |
199 | twl6040_vibra_disable(info); | |
200 | ||
cc697d38 MLC |
201 | } |
202 | ||
203 | static int vibra_play(struct input_dev *input, void *data, | |
204 | struct ff_effect *effect) | |
205 | { | |
206 | struct vibra_info *info = input_get_drvdata(input); | |
5f07c32e | 207 | |
cc697d38 MLC |
208 | info->weak_speed = effect->u.rumble.weak_magnitude; |
209 | info->strong_speed = effect->u.rumble.strong_magnitude; | |
210 | info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1; | |
211 | ||
5f7fb6f1 | 212 | schedule_work(&info->play_work); |
cc697d38 MLC |
213 | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static void twl6040_vibra_close(struct input_dev *input) | |
218 | { | |
219 | struct vibra_info *info = input_get_drvdata(input); | |
220 | ||
221 | cancel_work_sync(&info->play_work); | |
222 | ||
cc697d38 MLC |
223 | if (info->enabled) |
224 | twl6040_vibra_disable(info); | |
cc697d38 MLC |
225 | } |
226 | ||
97a652a8 | 227 | static int __maybe_unused twl6040_vibra_suspend(struct device *dev) |
cc697d38 MLC |
228 | { |
229 | struct platform_device *pdev = to_platform_device(dev); | |
230 | struct vibra_info *info = platform_get_drvdata(pdev); | |
231 | ||
9e4cc255 | 232 | cancel_work_sync(&info->play_work); |
cc697d38 MLC |
233 | |
234 | if (info->enabled) | |
235 | twl6040_vibra_disable(info); | |
236 | ||
cc697d38 MLC |
237 | return 0; |
238 | } | |
cc697d38 MLC |
239 | |
240 | static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL); | |
241 | ||
5298cc4c | 242 | static int twl6040_vibra_probe(struct platform_device *pdev) |
cc697d38 | 243 | { |
e7ec014a | 244 | struct device *twl6040_core_dev = pdev->dev.parent; |
32e573c4 | 245 | struct device_node *twl6040_core_node; |
cc697d38 | 246 | struct vibra_info *info; |
9ac7b1a3 PU |
247 | int vddvibl_uV = 0; |
248 | int vddvibr_uV = 0; | |
1f9e1470 | 249 | int error; |
cc697d38 | 250 | |
c52c545e | 251 | of_node_get(twl6040_core_dev->of_node); |
e7ec014a PU |
252 | twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node, |
253 | "vibra"); | |
7bf2a98a PU |
254 | if (!twl6040_core_node) { |
255 | dev_err(&pdev->dev, "parent of node is missing?\n"); | |
cc697d38 MLC |
256 | return -EINVAL; |
257 | } | |
258 | ||
b2ebcc1b | 259 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
cc697d38 | 260 | if (!info) { |
f048dd17 | 261 | of_node_put(twl6040_core_node); |
cc697d38 MLC |
262 | dev_err(&pdev->dev, "couldn't allocate memory\n"); |
263 | return -ENOMEM; | |
264 | } | |
265 | ||
266 | info->dev = &pdev->dev; | |
9ac7b1a3 | 267 | |
cc697d38 | 268 | info->twl6040 = dev_get_drvdata(pdev->dev.parent); |
7bf2a98a PU |
269 | |
270 | of_property_read_u32(twl6040_core_node, "ti,vibldrv-res", | |
271 | &info->vibldrv_res); | |
272 | of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res", | |
273 | &info->vibrdrv_res); | |
274 | of_property_read_u32(twl6040_core_node, "ti,viblmotor-res", | |
275 | &info->viblmotor_res); | |
276 | of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res", | |
277 | &info->vibrmotor_res); | |
278 | of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV", &vddvibl_uV); | |
279 | of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV", &vddvibr_uV); | |
9ac7b1a3 | 280 | |
f048dd17 LC |
281 | of_node_put(twl6040_core_node); |
282 | ||
cc697d38 MLC |
283 | if ((!info->vibldrv_res && !info->viblmotor_res) || |
284 | (!info->vibrdrv_res && !info->vibrmotor_res)) { | |
285 | dev_err(info->dev, "invalid vibra driver/motor resistance\n"); | |
b2ebcc1b | 286 | return -EINVAL; |
cc697d38 MLC |
287 | } |
288 | ||
625cbe46 PU |
289 | info->irq = platform_get_irq(pdev, 0); |
290 | if (info->irq < 0) { | |
291 | dev_err(info->dev, "invalid irq\n"); | |
b2ebcc1b | 292 | return -EINVAL; |
625cbe46 PU |
293 | } |
294 | ||
1f9e1470 | 295 | error = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, |
4be01a29 FE |
296 | twl6040_vib_irq_handler, |
297 | IRQF_ONESHOT, | |
1f9e1470 FE |
298 | "twl6040_irq_vib", info); |
299 | if (error) { | |
300 | dev_err(info->dev, "VIB IRQ request failed: %d\n", error); | |
301 | return error; | |
cc697d38 MLC |
302 | } |
303 | ||
304 | info->supplies[0].supply = "vddvibl"; | |
305 | info->supplies[1].supply = "vddvibr"; | |
e7ec014a PU |
306 | /* |
307 | * When booted with Device tree the regulators are attached to the | |
308 | * parent device (twl6040 MFD core) | |
309 | */ | |
1f9e1470 FE |
310 | error = devm_regulator_bulk_get(twl6040_core_dev, |
311 | ARRAY_SIZE(info->supplies), | |
312 | info->supplies); | |
313 | if (error) { | |
314 | dev_err(info->dev, "couldn't get regulators %d\n", error); | |
315 | return error; | |
cc697d38 MLC |
316 | } |
317 | ||
9ac7b1a3 | 318 | if (vddvibl_uV) { |
1f9e1470 FE |
319 | error = regulator_set_voltage(info->supplies[0].consumer, |
320 | vddvibl_uV, vddvibl_uV); | |
321 | if (error) { | |
cc697d38 | 322 | dev_err(info->dev, "failed to set VDDVIBL volt %d\n", |
1f9e1470 FE |
323 | error); |
324 | return error; | |
cc697d38 MLC |
325 | } |
326 | } | |
327 | ||
9ac7b1a3 | 328 | if (vddvibr_uV) { |
1f9e1470 FE |
329 | error = regulator_set_voltage(info->supplies[1].consumer, |
330 | vddvibr_uV, vddvibr_uV); | |
331 | if (error) { | |
cc697d38 | 332 | dev_err(info->dev, "failed to set VDDVIBR volt %d\n", |
1f9e1470 FE |
333 | error); |
334 | return error; | |
cc697d38 MLC |
335 | } |
336 | } | |
337 | ||
cc697d38 MLC |
338 | INIT_WORK(&info->play_work, vibra_play_work); |
339 | ||
1f9e1470 FE |
340 | info->input_dev = devm_input_allocate_device(&pdev->dev); |
341 | if (!info->input_dev) { | |
b2ebcc1b | 342 | dev_err(info->dev, "couldn't allocate input device\n"); |
1f9e1470 | 343 | return -ENOMEM; |
b2ebcc1b PU |
344 | } |
345 | ||
346 | input_set_drvdata(info->input_dev, info); | |
347 | ||
348 | info->input_dev->name = "twl6040:vibrator"; | |
349 | info->input_dev->id.version = 1; | |
b2ebcc1b PU |
350 | info->input_dev->close = twl6040_vibra_close; |
351 | __set_bit(FF_RUMBLE, info->input_dev->ffbit); | |
352 | ||
1f9e1470 FE |
353 | error = input_ff_create_memless(info->input_dev, NULL, vibra_play); |
354 | if (error) { | |
b2ebcc1b | 355 | dev_err(info->dev, "couldn't register vibrator to FF\n"); |
1f9e1470 | 356 | return error; |
b2ebcc1b PU |
357 | } |
358 | ||
1f9e1470 FE |
359 | error = input_register_device(info->input_dev); |
360 | if (error) { | |
b2ebcc1b | 361 | dev_err(info->dev, "couldn't register input device\n"); |
1f9e1470 | 362 | return error; |
b2ebcc1b PU |
363 | } |
364 | ||
365 | platform_set_drvdata(pdev, info); | |
366 | ||
cc697d38 MLC |
367 | return 0; |
368 | } | |
369 | ||
370 | static struct platform_driver twl6040_vibra_driver = { | |
371 | .probe = twl6040_vibra_probe, | |
cc697d38 MLC |
372 | .driver = { |
373 | .name = "twl6040-vibra", | |
cc697d38 MLC |
374 | .pm = &twl6040_vibra_pm_ops, |
375 | }, | |
376 | }; | |
840a746b | 377 | module_platform_driver(twl6040_vibra_driver); |
cc697d38 MLC |
378 | |
379 | MODULE_ALIAS("platform:twl6040-vibra"); | |
380 | MODULE_DESCRIPTION("TWL6040 Vibra driver"); | |
381 | MODULE_LICENSE("GPL"); | |
382 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); | |
383 | MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); |