1 | /* |
2 | * DRV260X haptics driver family |
3 | * |
4 | * Author: Dan Murphy <dmurphy@ti.com> |
5 | * |
6 | * Copyright: (C) 2014 Texas Instruments, Inc. |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License version 2 as |
10 | * published by the Free Software Foundation. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, but |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * General Public License for more details. |
16 | */ |
17 | |
18 | #include <linux/i2c.h> |
19 | #include <linux/input.h> |
20 | #include <linux/module.h> |
21 | #include <linux/regmap.h> |
22 | #include <linux/slab.h> |
23 | #include <linux/delay.h> |
24 | #include <linux/gpio/consumer.h> |
25 | #include <linux/regulator/consumer.h> |
26 | |
27 | #include <dt-bindings/input/ti-drv260x.h> |
28 | |
29 | #define DRV260X_STATUS 0x0 |
30 | #define DRV260X_MODE 0x1 |
31 | #define DRV260X_RT_PB_IN 0x2 |
32 | #define DRV260X_LIB_SEL 0x3 |
33 | #define DRV260X_WV_SEQ_1 0x4 |
34 | #define DRV260X_WV_SEQ_2 0x5 |
35 | #define DRV260X_WV_SEQ_3 0x6 |
36 | #define DRV260X_WV_SEQ_4 0x7 |
37 | #define DRV260X_WV_SEQ_5 0x8 |
38 | #define DRV260X_WV_SEQ_6 0x9 |
39 | #define DRV260X_WV_SEQ_7 0xa |
40 | #define DRV260X_WV_SEQ_8 0xb |
41 | #define DRV260X_GO 0xc |
42 | #define DRV260X_OVERDRIVE_OFF 0xd |
43 | #define DRV260X_SUSTAIN_P_OFF 0xe |
44 | #define DRV260X_SUSTAIN_N_OFF 0xf |
45 | #define DRV260X_BRAKE_OFF 0x10 |
46 | #define DRV260X_A_TO_V_CTRL 0x11 |
47 | #define DRV260X_A_TO_V_MIN_INPUT 0x12 |
48 | #define DRV260X_A_TO_V_MAX_INPUT 0x13 |
49 | #define DRV260X_A_TO_V_MIN_OUT 0x14 |
50 | #define DRV260X_A_TO_V_MAX_OUT 0x15 |
51 | #define DRV260X_RATED_VOLT 0x16 |
52 | #define DRV260X_OD_CLAMP_VOLT 0x17 |
53 | #define DRV260X_CAL_COMP 0x18 |
54 | #define DRV260X_CAL_BACK_EMF 0x19 |
55 | #define DRV260X_FEEDBACK_CTRL 0x1a |
56 | #define DRV260X_CTRL1 0x1b |
57 | #define DRV260X_CTRL2 0x1c |
58 | #define DRV260X_CTRL3 0x1d |
59 | #define DRV260X_CTRL4 0x1e |
60 | #define DRV260X_CTRL5 0x1f |
61 | #define DRV260X_LRA_LOOP_PERIOD 0x20 |
62 | #define DRV260X_VBAT_MON 0x21 |
63 | #define DRV260X_LRA_RES_PERIOD 0x22 |
64 | #define DRV260X_MAX_REG 0x23 |
65 | |
66 | #define DRV260X_GO_BIT 0x01 |
67 | |
68 | /* Library Selection */ |
69 | #define DRV260X_LIB_SEL_MASK 0x07 |
70 | #define DRV260X_LIB_SEL_RAM 0x0 |
71 | #define DRV260X_LIB_SEL_OD 0x1 |
72 | #define DRV260X_LIB_SEL_40_60 0x2 |
73 | #define DRV260X_LIB_SEL_60_80 0x3 |
74 | #define DRV260X_LIB_SEL_100_140 0x4 |
75 | #define DRV260X_LIB_SEL_140_PLUS 0x5 |
76 | |
77 | #define DRV260X_LIB_SEL_HIZ_MASK 0x10 |
78 | #define DRV260X_LIB_SEL_HIZ_EN 0x01 |
79 | #define DRV260X_LIB_SEL_HIZ_DIS 0 |
80 | |
81 | /* Mode register */ |
82 | #define DRV260X_STANDBY (1 << 6) |
83 | #define DRV260X_STANDBY_MASK 0x40 |
84 | #define DRV260X_INTERNAL_TRIGGER 0x00 |
85 | #define DRV260X_EXT_TRIGGER_EDGE 0x01 |
86 | #define DRV260X_EXT_TRIGGER_LEVEL 0x02 |
87 | #define DRV260X_PWM_ANALOG_IN 0x03 |
88 | #define DRV260X_AUDIOHAPTIC 0x04 |
89 | #define DRV260X_RT_PLAYBACK 0x05 |
90 | #define DRV260X_DIAGNOSTICS 0x06 |
91 | #define DRV260X_AUTO_CAL 0x07 |
92 | |
93 | /* Audio to Haptics Control */ |
94 | #define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2) |
95 | #define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2) |
96 | #define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2) |
97 | #define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2) |
98 | |
99 | #define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00 |
100 | #define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01 |
101 | #define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02 |
102 | #define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03 |
103 | |
104 | /* Min/Max Input/Output Voltages */ |
105 | #define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19 |
106 | #define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64 |
107 | #define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19 |
108 | #define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF |
109 | |
110 | /* Feedback register */ |
111 | #define DRV260X_FB_REG_ERM_MODE 0x7f |
112 | #define DRV260X_FB_REG_LRA_MODE (1 << 7) |
113 | |
114 | #define DRV260X_BRAKE_FACTOR_MASK 0x1f |
115 | #define DRV260X_BRAKE_FACTOR_2X (1 << 0) |
116 | #define DRV260X_BRAKE_FACTOR_3X (2 << 4) |
117 | #define DRV260X_BRAKE_FACTOR_4X (3 << 4) |
118 | #define DRV260X_BRAKE_FACTOR_6X (4 << 4) |
119 | #define DRV260X_BRAKE_FACTOR_8X (5 << 4) |
120 | #define DRV260X_BRAKE_FACTOR_16 (6 << 4) |
121 | #define DRV260X_BRAKE_FACTOR_DIS (7 << 4) |
122 | |
123 | #define DRV260X_LOOP_GAIN_LOW 0xf3 |
124 | #define DRV260X_LOOP_GAIN_MED (1 << 2) |
125 | #define DRV260X_LOOP_GAIN_HIGH (2 << 2) |
126 | #define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2) |
127 | |
128 | #define DRV260X_BEMF_GAIN_0 0xfc |
129 | #define DRV260X_BEMF_GAIN_1 (1 << 0) |
130 | #define DRV260X_BEMF_GAIN_2 (2 << 0) |
131 | #define DRV260X_BEMF_GAIN_3 (3 << 0) |
132 | |
133 | /* Control 1 register */ |
134 | #define DRV260X_AC_CPLE_EN (1 << 5) |
135 | #define DRV260X_STARTUP_BOOST (1 << 7) |
136 | |
137 | /* Control 2 register */ |
138 | |
139 | #define DRV260X_IDISS_TIME_45 0 |
140 | #define DRV260X_IDISS_TIME_75 (1 << 0) |
141 | #define DRV260X_IDISS_TIME_150 (1 << 1) |
142 | #define DRV260X_IDISS_TIME_225 0x03 |
143 | |
144 | #define DRV260X_BLANK_TIME_45 (0 << 2) |
145 | #define DRV260X_BLANK_TIME_75 (1 << 2) |
146 | #define DRV260X_BLANK_TIME_150 (2 << 2) |
147 | #define DRV260X_BLANK_TIME_225 (3 << 2) |
148 | |
149 | #define DRV260X_SAMP_TIME_150 (0 << 4) |
150 | #define DRV260X_SAMP_TIME_200 (1 << 4) |
151 | #define DRV260X_SAMP_TIME_250 (2 << 4) |
152 | #define DRV260X_SAMP_TIME_300 (3 << 4) |
153 | |
154 | #define DRV260X_BRAKE_STABILIZER (1 << 6) |
155 | #define DRV260X_UNIDIR_IN (0 << 7) |
156 | #define DRV260X_BIDIR_IN (1 << 7) |
157 | |
158 | /* Control 3 Register */ |
159 | #define DRV260X_LRA_OPEN_LOOP (1 << 0) |
160 | #define DRV260X_ANANLOG_IN (1 << 1) |
161 | #define DRV260X_LRA_DRV_MODE (1 << 2) |
162 | #define DRV260X_RTP_UNSIGNED_DATA (1 << 3) |
163 | #define DRV260X_SUPPLY_COMP_DIS (1 << 4) |
164 | #define DRV260X_ERM_OPEN_LOOP (1 << 5) |
165 | #define DRV260X_NG_THRESH_0 (0 << 6) |
166 | #define DRV260X_NG_THRESH_2 (1 << 6) |
167 | #define DRV260X_NG_THRESH_4 (2 << 6) |
168 | #define DRV260X_NG_THRESH_8 (3 << 6) |
169 | |
170 | /* Control 4 Register */ |
171 | #define DRV260X_AUTOCAL_TIME_150MS (0 << 4) |
172 | #define DRV260X_AUTOCAL_TIME_250MS (1 << 4) |
173 | #define DRV260X_AUTOCAL_TIME_500MS (2 << 4) |
174 | #define DRV260X_AUTOCAL_TIME_1000MS (3 << 4) |
175 | |
176 | /** |
177 | * struct drv260x_data - |
178 | * @input_dev - Pointer to the input device |
179 | * @client - Pointer to the I2C client |
180 | * @regmap - Register map of the device |
181 | * @work - Work item used to off load the enable/disable of the vibration |
182 | * @enable_gpio - Pointer to the gpio used for enable/disabling |
183 | * @regulator - Pointer to the regulator for the IC |
184 | * @magnitude - Magnitude of the vibration event |
185 | * @mode - The operating mode of the IC (LRA_NO_CAL, ERM or LRA) |
186 | * @library - The vibration library to be used |
187 | * @rated_voltage - The rated_voltage of the actuator |
188 | * @overdriver_voltage - The over drive voltage of the actuator |
189 | **/ |
190 | struct drv260x_data { |
191 | struct input_dev *input_dev; |
192 | struct i2c_client *client; |
193 | struct regmap *regmap; |
194 | struct work_struct work; |
195 | struct gpio_desc *enable_gpio; |
196 | struct regulator *regulator; |
197 | u32 magnitude; |
198 | u32 mode; |
199 | u32 library; |
200 | int rated_voltage; |
201 | int overdrive_voltage; |
202 | }; |
203 | |
204 | static const struct reg_default drv260x_reg_defs[] = { |
205 | { DRV260X_STATUS, 0xe0 }, |
206 | { DRV260X_MODE, 0x40 }, |
207 | { DRV260X_RT_PB_IN, 0x00 }, |
208 | { DRV260X_LIB_SEL, 0x00 }, |
209 | { DRV260X_WV_SEQ_1, 0x01 }, |
210 | { DRV260X_WV_SEQ_2, 0x00 }, |
211 | { DRV260X_WV_SEQ_3, 0x00 }, |
212 | { DRV260X_WV_SEQ_4, 0x00 }, |
213 | { DRV260X_WV_SEQ_5, 0x00 }, |
214 | { DRV260X_WV_SEQ_6, 0x00 }, |
215 | { DRV260X_WV_SEQ_7, 0x00 }, |
216 | { DRV260X_WV_SEQ_8, 0x00 }, |
217 | { DRV260X_GO, 0x00 }, |
218 | { DRV260X_OVERDRIVE_OFF, 0x00 }, |
219 | { DRV260X_SUSTAIN_P_OFF, 0x00 }, |
220 | { DRV260X_SUSTAIN_N_OFF, 0x00 }, |
221 | { DRV260X_BRAKE_OFF, 0x00 }, |
222 | { DRV260X_A_TO_V_CTRL, 0x05 }, |
223 | { DRV260X_A_TO_V_MIN_INPUT, 0x19 }, |
224 | { DRV260X_A_TO_V_MAX_INPUT, 0xff }, |
225 | { DRV260X_A_TO_V_MIN_OUT, 0x19 }, |
226 | { DRV260X_A_TO_V_MAX_OUT, 0xff }, |
227 | { DRV260X_RATED_VOLT, 0x3e }, |
228 | { DRV260X_OD_CLAMP_VOLT, 0x8c }, |
229 | { DRV260X_CAL_COMP, 0x0c }, |
230 | { DRV260X_CAL_BACK_EMF, 0x6c }, |
231 | { DRV260X_FEEDBACK_CTRL, 0x36 }, |
232 | { DRV260X_CTRL1, 0x93 }, |
233 | { DRV260X_CTRL2, 0xfa }, |
234 | { DRV260X_CTRL3, 0xa0 }, |
235 | { DRV260X_CTRL4, 0x20 }, |
236 | { DRV260X_CTRL5, 0x80 }, |
237 | { DRV260X_LRA_LOOP_PERIOD, 0x33 }, |
238 | { DRV260X_VBAT_MON, 0x00 }, |
239 | { DRV260X_LRA_RES_PERIOD, 0x00 }, |
240 | }; |
241 | |
242 | #define DRV260X_DEF_RATED_VOLT 0x90 |
243 | #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 |
244 | |
245 | /** |
246 | * Rated and Overdriver Voltages: |
247 | * Calculated using the formula r = v * 255 / 5.6 |
248 | * where r is what will be written to the register |
249 | * and v is the rated or overdriver voltage of the actuator |
250 | **/ |
251 | static int drv260x_calculate_voltage(unsigned int voltage) |
252 | { |
253 | return (voltage * 255 / 5600); |
254 | } |
255 | |
256 | static void drv260x_worker(struct work_struct *work) |
257 | { |
258 | struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); |
259 | int error; |
260 | |
261 | gpiod_set_value(haptics->enable_gpio, 1); |
262 | /* Data sheet says to wait 250us before trying to communicate */ |
263 | udelay(250); |
264 | |
265 | error = regmap_write(haptics->regmap, |
266 | DRV260X_MODE, DRV260X_RT_PLAYBACK); |
267 | if (error) { |
268 | dev_err(&haptics->client->dev, |
269 | "Failed to write set mode: %d\n" , error); |
270 | } else { |
271 | error = regmap_write(haptics->regmap, |
272 | DRV260X_RT_PB_IN, haptics->magnitude); |
273 | if (error) |
274 | dev_err(&haptics->client->dev, |
275 | "Failed to set magnitude: %d\n" , error); |
276 | } |
277 | } |
278 | |
279 | static int drv260x_haptics_play(struct input_dev *input, void *data, |
280 | struct ff_effect *effect) |
281 | { |
282 | struct drv260x_data *haptics = input_get_drvdata(input); |
283 | |
284 | haptics->mode = DRV260X_LRA_NO_CAL_MODE; |
285 | |
286 | if (effect->u.rumble.strong_magnitude > 0) |
287 | haptics->magnitude = effect->u.rumble.strong_magnitude; |
288 | else if (effect->u.rumble.weak_magnitude > 0) |
289 | haptics->magnitude = effect->u.rumble.weak_magnitude; |
290 | else |
291 | haptics->magnitude = 0; |
292 | |
293 | schedule_work(&haptics->work); |
294 | |
295 | return 0; |
296 | } |
297 | |
298 | static void drv260x_close(struct input_dev *input) |
299 | { |
300 | struct drv260x_data *haptics = input_get_drvdata(input); |
301 | int error; |
302 | |
303 | cancel_work_sync(&haptics->work); |
304 | |
305 | error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); |
306 | if (error) |
307 | dev_err(&haptics->client->dev, |
308 | "Failed to enter standby mode: %d\n" , error); |
309 | |
310 | gpiod_set_value(haptics->enable_gpio, 0); |
311 | } |
312 | |
313 | static const struct reg_sequence drv260x_lra_cal_regs[] = { |
314 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
315 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 }, |
316 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
317 | DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, |
318 | }; |
319 | |
320 | static const struct reg_sequence drv260x_lra_init_regs[] = { |
321 | { DRV260X_MODE, DRV260X_RT_PLAYBACK }, |
322 | { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | |
323 | DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, |
324 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
325 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
326 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
327 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
328 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
329 | DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | |
330 | DRV260X_BEMF_GAIN_3 }, |
331 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
332 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, |
333 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN }, |
334 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
335 | }; |
336 | |
337 | static const struct reg_sequence drv260x_erm_cal_regs[] = { |
338 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
339 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
340 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
341 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
342 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
343 | { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | |
344 | DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, |
345 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
346 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | |
347 | DRV260X_IDISS_TIME_75 }, |
348 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP }, |
349 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
350 | }; |
351 | |
352 | static int drv260x_init(struct drv260x_data *haptics) |
353 | { |
354 | int error; |
355 | unsigned int cal_buf; |
356 | |
357 | error = regmap_write(haptics->regmap, |
358 | DRV260X_RATED_VOLT, haptics->rated_voltage); |
359 | if (error) { |
360 | dev_err(&haptics->client->dev, |
361 | "Failed to write DRV260X_RATED_VOLT register: %d\n" , |
362 | error); |
363 | return error; |
364 | } |
365 | |
366 | error = regmap_write(haptics->regmap, |
367 | DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); |
368 | if (error) { |
369 | dev_err(&haptics->client->dev, |
370 | "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n" , |
371 | error); |
372 | return error; |
373 | } |
374 | |
375 | switch (haptics->mode) { |
376 | case DRV260X_LRA_MODE: |
377 | error = regmap_register_patch(haptics->regmap, |
378 | drv260x_lra_cal_regs, |
379 | ARRAY_SIZE(drv260x_lra_cal_regs)); |
380 | if (error) { |
381 | dev_err(&haptics->client->dev, |
382 | "Failed to write LRA calibration registers: %d\n" , |
383 | error); |
384 | return error; |
385 | } |
386 | |
387 | break; |
388 | |
389 | case DRV260X_ERM_MODE: |
390 | error = regmap_register_patch(haptics->regmap, |
391 | drv260x_erm_cal_regs, |
392 | ARRAY_SIZE(drv260x_erm_cal_regs)); |
393 | if (error) { |
394 | dev_err(&haptics->client->dev, |
395 | "Failed to write ERM calibration registers: %d\n" , |
396 | error); |
397 | return error; |
398 | } |
399 | |
400 | error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, |
401 | DRV260X_LIB_SEL_MASK, |
402 | haptics->library); |
403 | if (error) { |
404 | dev_err(&haptics->client->dev, |
405 | "Failed to write DRV260X_LIB_SEL register: %d\n" , |
406 | error); |
407 | return error; |
408 | } |
409 | |
410 | break; |
411 | |
412 | default: |
413 | error = regmap_register_patch(haptics->regmap, |
414 | drv260x_lra_init_regs, |
415 | ARRAY_SIZE(drv260x_lra_init_regs)); |
416 | if (error) { |
417 | dev_err(&haptics->client->dev, |
418 | "Failed to write LRA init registers: %d\n" , |
419 | error); |
420 | return error; |
421 | } |
422 | |
423 | error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, |
424 | DRV260X_LIB_SEL_MASK, |
425 | haptics->library); |
426 | if (error) { |
427 | dev_err(&haptics->client->dev, |
428 | "Failed to write DRV260X_LIB_SEL register: %d\n" , |
429 | error); |
430 | return error; |
431 | } |
432 | |
433 | /* No need to set GO bit here */ |
434 | return 0; |
435 | } |
436 | |
437 | error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); |
438 | if (error) { |
439 | dev_err(&haptics->client->dev, |
440 | "Failed to write GO register: %d\n" , |
441 | error); |
442 | return error; |
443 | } |
444 | |
445 | do { |
446 | error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); |
447 | if (error) { |
448 | dev_err(&haptics->client->dev, |
449 | "Failed to read GO register: %d\n" , |
450 | error); |
451 | return error; |
452 | } |
453 | } while (cal_buf == DRV260X_GO_BIT); |
454 | |
455 | return 0; |
456 | } |
457 | |
458 | static const struct regmap_config drv260x_regmap_config = { |
459 | .reg_bits = 8, |
460 | .val_bits = 8, |
461 | |
462 | .max_register = DRV260X_MAX_REG, |
463 | .reg_defaults = drv260x_reg_defs, |
464 | .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs), |
465 | .cache_type = REGCACHE_NONE, |
466 | }; |
467 | |
468 | static int drv260x_probe(struct i2c_client *client, |
469 | const struct i2c_device_id *id) |
470 | { |
471 | struct device *dev = &client->dev; |
472 | struct drv260x_data *haptics; |
473 | u32 voltage; |
474 | int error; |
475 | |
476 | haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); |
477 | if (!haptics) |
478 | return -ENOMEM; |
479 | |
480 | error = device_property_read_u32(dev, "mode" , &haptics->mode); |
481 | if (error) { |
482 | dev_err(dev, "Can't fetch 'mode' property: %d\n" , error); |
483 | return error; |
484 | } |
485 | |
486 | if (haptics->mode < DRV260X_LRA_MODE || |
487 | haptics->mode > DRV260X_ERM_MODE) { |
488 | dev_err(dev, "Vibrator mode is invalid: %i\n" , haptics->mode); |
489 | return -EINVAL; |
490 | } |
491 | |
492 | error = device_property_read_u32(dev, "library-sel" , &haptics->library); |
493 | if (error) { |
494 | dev_err(dev, "Can't fetch 'library-sel' property: %d\n" , error); |
495 | return error; |
496 | } |
497 | |
498 | if (haptics->library < DRV260X_LIB_EMPTY || |
499 | haptics->library > DRV260X_ERM_LIB_F) { |
500 | dev_err(dev, |
501 | "Library value is invalid: %i\n" , haptics->library); |
502 | return -EINVAL; |
503 | } |
504 | |
505 | if (haptics->mode == DRV260X_LRA_MODE && |
506 | haptics->library != DRV260X_LIB_EMPTY && |
507 | haptics->library != DRV260X_LIB_LRA) { |
508 | dev_err(dev, "LRA Mode with ERM Library mismatch\n" ); |
509 | return -EINVAL; |
510 | } |
511 | |
512 | if (haptics->mode == DRV260X_ERM_MODE && |
513 | (haptics->library == DRV260X_LIB_EMPTY || |
514 | haptics->library == DRV260X_LIB_LRA)) { |
515 | dev_err(dev, "ERM Mode with LRA Library mismatch\n" ); |
516 | return -EINVAL; |
517 | } |
518 | |
519 | error = device_property_read_u32(dev, "vib-rated-mv" , &voltage); |
520 | haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : |
521 | drv260x_calculate_voltage(voltage); |
522 | |
523 | error = device_property_read_u32(dev, "vib-overdrive-mv" , &voltage); |
524 | haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : |
525 | drv260x_calculate_voltage(voltage); |
526 | |
527 | haptics->regulator = devm_regulator_get(dev, "vbat" ); |
528 | if (IS_ERR(haptics->regulator)) { |
529 | error = PTR_ERR(haptics->regulator); |
530 | dev_err(dev, "unable to get regulator, error: %d\n" , error); |
531 | return error; |
532 | } |
533 | |
534 | haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable" , |
535 | GPIOD_OUT_HIGH); |
536 | if (IS_ERR(haptics->enable_gpio)) |
537 | return PTR_ERR(haptics->enable_gpio); |
538 | |
539 | haptics->input_dev = devm_input_allocate_device(dev); |
540 | if (!haptics->input_dev) { |
541 | dev_err(dev, "Failed to allocate input device\n" ); |
542 | return -ENOMEM; |
543 | } |
544 | |
545 | haptics->input_dev->name = "drv260x:haptics" ; |
546 | haptics->input_dev->close = drv260x_close; |
547 | input_set_drvdata(haptics->input_dev, haptics); |
548 | input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); |
549 | |
550 | error = input_ff_create_memless(haptics->input_dev, NULL, |
551 | drv260x_haptics_play); |
552 | if (error) { |
553 | dev_err(dev, "input_ff_create() failed: %d\n" , error); |
554 | return error; |
555 | } |
556 | |
557 | INIT_WORK(&haptics->work, drv260x_worker); |
558 | |
559 | haptics->client = client; |
560 | i2c_set_clientdata(client, haptics); |
561 | |
562 | haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); |
563 | if (IS_ERR(haptics->regmap)) { |
564 | error = PTR_ERR(haptics->regmap); |
565 | dev_err(dev, "Failed to allocate register map: %d\n" , error); |
566 | return error; |
567 | } |
568 | |
569 | error = drv260x_init(haptics); |
570 | if (error) { |
571 | dev_err(dev, "Device init failed: %d\n" , error); |
572 | return error; |
573 | } |
574 | |
575 | error = input_register_device(haptics->input_dev); |
576 | if (error) { |
577 | dev_err(dev, "couldn't register input device: %d\n" , error); |
578 | return error; |
579 | } |
580 | |
581 | return 0; |
582 | } |
583 | |
584 | static int __maybe_unused drv260x_suspend(struct device *dev) |
585 | { |
586 | struct drv260x_data *haptics = dev_get_drvdata(dev); |
587 | int ret = 0; |
588 | |
589 | mutex_lock(&haptics->input_dev->mutex); |
590 | |
591 | if (haptics->input_dev->users) { |
592 | ret = regmap_update_bits(haptics->regmap, |
593 | DRV260X_MODE, |
594 | DRV260X_STANDBY_MASK, |
595 | DRV260X_STANDBY); |
596 | if (ret) { |
597 | dev_err(dev, "Failed to set standby mode\n" ); |
598 | goto out; |
599 | } |
600 | |
601 | gpiod_set_value(haptics->enable_gpio, 0); |
602 | |
603 | ret = regulator_disable(haptics->regulator); |
604 | if (ret) { |
605 | dev_err(dev, "Failed to disable regulator\n" ); |
606 | regmap_update_bits(haptics->regmap, |
607 | DRV260X_MODE, |
608 | DRV260X_STANDBY_MASK, 0); |
609 | } |
610 | } |
611 | out: |
612 | mutex_unlock(&haptics->input_dev->mutex); |
613 | return ret; |
614 | } |
615 | |
616 | static int __maybe_unused drv260x_resume(struct device *dev) |
617 | { |
618 | struct drv260x_data *haptics = dev_get_drvdata(dev); |
619 | int ret = 0; |
620 | |
621 | mutex_lock(&haptics->input_dev->mutex); |
622 | |
623 | if (haptics->input_dev->users) { |
624 | ret = regulator_enable(haptics->regulator); |
625 | if (ret) { |
626 | dev_err(dev, "Failed to enable regulator\n" ); |
627 | goto out; |
628 | } |
629 | |
630 | ret = regmap_update_bits(haptics->regmap, |
631 | DRV260X_MODE, |
632 | DRV260X_STANDBY_MASK, 0); |
633 | if (ret) { |
634 | dev_err(dev, "Failed to unset standby mode\n" ); |
635 | regulator_disable(haptics->regulator); |
636 | goto out; |
637 | } |
638 | |
639 | gpiod_set_value(haptics->enable_gpio, 1); |
640 | } |
641 | |
642 | out: |
643 | mutex_unlock(&haptics->input_dev->mutex); |
644 | return ret; |
645 | } |
646 | |
647 | static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); |
648 | |
649 | static const struct i2c_device_id drv260x_id[] = { |
650 | { "drv2605l" , 0 }, |
651 | { } |
652 | }; |
653 | MODULE_DEVICE_TABLE(i2c, drv260x_id); |
654 | |
655 | static const struct of_device_id drv260x_of_match[] = { |
656 | { .compatible = "ti,drv2604" , }, |
657 | { .compatible = "ti,drv2604l" , }, |
658 | { .compatible = "ti,drv2605" , }, |
659 | { .compatible = "ti,drv2605l" , }, |
660 | { } |
661 | }; |
662 | MODULE_DEVICE_TABLE(of, drv260x_of_match); |
663 | |
664 | static struct i2c_driver drv260x_driver = { |
665 | .probe = drv260x_probe, |
666 | .driver = { |
667 | .name = "drv260x-haptics" , |
668 | .of_match_table = drv260x_of_match, |
669 | .pm = &drv260x_pm_ops, |
670 | }, |
671 | .id_table = drv260x_id, |
672 | }; |
673 | module_i2c_driver(drv260x_driver); |
674 | |
675 | MODULE_DESCRIPTION("TI DRV260x haptics driver" ); |
676 | MODULE_LICENSE("GPL" ); |
677 | MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>" ); |
678 | |