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7132fe4f DM |
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> | |
7132fe4f DM |
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> | |
7132fe4f DM |
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 | ||
7132fe4f DM |
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 | ||
ec0843fa | 204 | static const struct reg_default drv260x_reg_defs[] = { |
7132fe4f DM |
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 | ||
8019ff6c | 313 | static const struct reg_sequence drv260x_lra_cal_regs[] = { |
7132fe4f DM |
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 | ||
8019ff6c | 320 | static const struct reg_sequence drv260x_lra_init_regs[] = { |
7132fe4f DM |
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 | ||
8019ff6c | 337 | static const struct reg_sequence drv260x_erm_cal_regs[] = { |
7132fe4f DM |
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 | ||
7132fe4f DM |
468 | static int drv260x_probe(struct i2c_client *client, |
469 | const struct i2c_device_id *id) | |
470 | { | |
ba4cf378 | 471 | struct device *dev = &client->dev; |
7132fe4f | 472 | struct drv260x_data *haptics; |
34888602 | 473 | u32 voltage; |
7132fe4f DM |
474 | int error; |
475 | ||
ba4cf378 | 476 | haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); |
7132fe4f DM |
477 | if (!haptics) |
478 | return -ENOMEM; | |
479 | ||
34888602 JW |
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; | |
7132fe4f DM |
484 | } |
485 | ||
7132fe4f DM |
486 | if (haptics->mode < DRV260X_LRA_MODE || |
487 | haptics->mode > DRV260X_ERM_MODE) { | |
ba4cf378 | 488 | dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); |
7132fe4f DM |
489 | return -EINVAL; |
490 | } | |
491 | ||
34888602 JW |
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 | ||
7132fe4f DM |
498 | if (haptics->library < DRV260X_LIB_EMPTY || |
499 | haptics->library > DRV260X_ERM_LIB_F) { | |
ba4cf378 | 500 | dev_err(dev, |
7132fe4f DM |
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) { | |
ba4cf378 | 508 | dev_err(dev, "LRA Mode with ERM Library mismatch\n"); |
7132fe4f DM |
509 | return -EINVAL; |
510 | } | |
511 | ||
dddf3bc4 DM |
512 | if (haptics->mode == DRV260X_ERM_MODE && |
513 | (haptics->library == DRV260X_LIB_EMPTY || | |
514 | haptics->library == DRV260X_LIB_LRA)) { | |
ba4cf378 | 515 | dev_err(dev, "ERM Mode with LRA Library mismatch\n"); |
dddf3bc4 DM |
516 | return -EINVAL; |
517 | } | |
518 | ||
34888602 JW |
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 | ||
ba4cf378 | 527 | haptics->regulator = devm_regulator_get(dev, "vbat"); |
7132fe4f DM |
528 | if (IS_ERR(haptics->regulator)) { |
529 | error = PTR_ERR(haptics->regulator); | |
ba4cf378 | 530 | dev_err(dev, "unable to get regulator, error: %d\n", error); |
7132fe4f DM |
531 | return error; |
532 | } | |
533 | ||
ba4cf378 | 534 | haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", |
ea0afac4 UKK |
535 | GPIOD_OUT_HIGH); |
536 | if (IS_ERR(haptics->enable_gpio)) | |
537 | return PTR_ERR(haptics->enable_gpio); | |
7132fe4f | 538 | |
ba4cf378 | 539 | haptics->input_dev = devm_input_allocate_device(dev); |
7132fe4f | 540 | if (!haptics->input_dev) { |
a0d86ecd | 541 | dev_err(dev, "Failed to allocate input device\n"); |
7132fe4f DM |
542 | return -ENOMEM; |
543 | } | |
544 | ||
545 | haptics->input_dev->name = "drv260x:haptics"; | |
7132fe4f DM |
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) { | |
ba4cf378 | 553 | dev_err(dev, "input_ff_create() failed: %d\n", error); |
7132fe4f DM |
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); | |
ba4cf378 | 565 | dev_err(dev, "Failed to allocate register map: %d\n", error); |
7132fe4f DM |
566 | return error; |
567 | } | |
568 | ||
569 | error = drv260x_init(haptics); | |
570 | if (error) { | |
ba4cf378 | 571 | dev_err(dev, "Device init failed: %d\n", error); |
7132fe4f DM |
572 | return error; |
573 | } | |
574 | ||
575 | error = input_register_device(haptics->input_dev); | |
576 | if (error) { | |
ba4cf378 | 577 | dev_err(dev, "couldn't register input device: %d\n", error); |
7132fe4f DM |
578 | return error; |
579 | } | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
97a652a8 | 584 | static int __maybe_unused drv260x_suspend(struct device *dev) |
7132fe4f DM |
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 | ||
97a652a8 | 616 | static int __maybe_unused drv260x_resume(struct device *dev) |
7132fe4f DM |
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 | } | |
7132fe4f DM |
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 | ||
7132fe4f DM |
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); | |
7132fe4f DM |
663 | |
664 | static struct i2c_driver drv260x_driver = { | |
665 | .probe = drv260x_probe, | |
666 | .driver = { | |
667 | .name = "drv260x-haptics", | |
bc682a50 | 668 | .of_match_table = drv260x_of_match, |
7132fe4f DM |
669 | .pm = &drv260x_pm_ops, |
670 | }, | |
671 | .id_table = drv260x_id, | |
672 | }; | |
673 | module_i2c_driver(drv260x_driver); | |
674 | ||
7132fe4f DM |
675 | MODULE_DESCRIPTION("TI DRV260x haptics driver"); |
676 | MODULE_LICENSE("GPL"); | |
677 | MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); |