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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> | |
21 | #include <linux/of_gpio.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/gpio/consumer.h> | |
27 | #include <linux/regulator/consumer.h> | |
28 | ||
29 | #include <dt-bindings/input/ti-drv260x.h> | |
30 | #include <linux/platform_data/drv260x-pdata.h> | |
31 | ||
32 | #define DRV260X_STATUS 0x0 | |
33 | #define DRV260X_MODE 0x1 | |
34 | #define DRV260X_RT_PB_IN 0x2 | |
35 | #define DRV260X_LIB_SEL 0x3 | |
36 | #define DRV260X_WV_SEQ_1 0x4 | |
37 | #define DRV260X_WV_SEQ_2 0x5 | |
38 | #define DRV260X_WV_SEQ_3 0x6 | |
39 | #define DRV260X_WV_SEQ_4 0x7 | |
40 | #define DRV260X_WV_SEQ_5 0x8 | |
41 | #define DRV260X_WV_SEQ_6 0x9 | |
42 | #define DRV260X_WV_SEQ_7 0xa | |
43 | #define DRV260X_WV_SEQ_8 0xb | |
44 | #define DRV260X_GO 0xc | |
45 | #define DRV260X_OVERDRIVE_OFF 0xd | |
46 | #define DRV260X_SUSTAIN_P_OFF 0xe | |
47 | #define DRV260X_SUSTAIN_N_OFF 0xf | |
48 | #define DRV260X_BRAKE_OFF 0x10 | |
49 | #define DRV260X_A_TO_V_CTRL 0x11 | |
50 | #define DRV260X_A_TO_V_MIN_INPUT 0x12 | |
51 | #define DRV260X_A_TO_V_MAX_INPUT 0x13 | |
52 | #define DRV260X_A_TO_V_MIN_OUT 0x14 | |
53 | #define DRV260X_A_TO_V_MAX_OUT 0x15 | |
54 | #define DRV260X_RATED_VOLT 0x16 | |
55 | #define DRV260X_OD_CLAMP_VOLT 0x17 | |
56 | #define DRV260X_CAL_COMP 0x18 | |
57 | #define DRV260X_CAL_BACK_EMF 0x19 | |
58 | #define DRV260X_FEEDBACK_CTRL 0x1a | |
59 | #define DRV260X_CTRL1 0x1b | |
60 | #define DRV260X_CTRL2 0x1c | |
61 | #define DRV260X_CTRL3 0x1d | |
62 | #define DRV260X_CTRL4 0x1e | |
63 | #define DRV260X_CTRL5 0x1f | |
64 | #define DRV260X_LRA_LOOP_PERIOD 0x20 | |
65 | #define DRV260X_VBAT_MON 0x21 | |
66 | #define DRV260X_LRA_RES_PERIOD 0x22 | |
67 | #define DRV260X_MAX_REG 0x23 | |
68 | ||
7132fe4f DM |
69 | #define DRV260X_GO_BIT 0x01 |
70 | ||
71 | /* Library Selection */ | |
72 | #define DRV260X_LIB_SEL_MASK 0x07 | |
73 | #define DRV260X_LIB_SEL_RAM 0x0 | |
74 | #define DRV260X_LIB_SEL_OD 0x1 | |
75 | #define DRV260X_LIB_SEL_40_60 0x2 | |
76 | #define DRV260X_LIB_SEL_60_80 0x3 | |
77 | #define DRV260X_LIB_SEL_100_140 0x4 | |
78 | #define DRV260X_LIB_SEL_140_PLUS 0x5 | |
79 | ||
80 | #define DRV260X_LIB_SEL_HIZ_MASK 0x10 | |
81 | #define DRV260X_LIB_SEL_HIZ_EN 0x01 | |
82 | #define DRV260X_LIB_SEL_HIZ_DIS 0 | |
83 | ||
84 | /* Mode register */ | |
85 | #define DRV260X_STANDBY (1 << 6) | |
86 | #define DRV260X_STANDBY_MASK 0x40 | |
87 | #define DRV260X_INTERNAL_TRIGGER 0x00 | |
88 | #define DRV260X_EXT_TRIGGER_EDGE 0x01 | |
89 | #define DRV260X_EXT_TRIGGER_LEVEL 0x02 | |
90 | #define DRV260X_PWM_ANALOG_IN 0x03 | |
91 | #define DRV260X_AUDIOHAPTIC 0x04 | |
92 | #define DRV260X_RT_PLAYBACK 0x05 | |
93 | #define DRV260X_DIAGNOSTICS 0x06 | |
94 | #define DRV260X_AUTO_CAL 0x07 | |
95 | ||
96 | /* Audio to Haptics Control */ | |
97 | #define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2) | |
98 | #define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2) | |
99 | #define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2) | |
100 | #define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2) | |
101 | ||
102 | #define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00 | |
103 | #define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01 | |
104 | #define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02 | |
105 | #define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03 | |
106 | ||
107 | /* Min/Max Input/Output Voltages */ | |
108 | #define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19 | |
109 | #define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64 | |
110 | #define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19 | |
111 | #define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF | |
112 | ||
113 | /* Feedback register */ | |
114 | #define DRV260X_FB_REG_ERM_MODE 0x7f | |
115 | #define DRV260X_FB_REG_LRA_MODE (1 << 7) | |
116 | ||
117 | #define DRV260X_BRAKE_FACTOR_MASK 0x1f | |
118 | #define DRV260X_BRAKE_FACTOR_2X (1 << 0) | |
119 | #define DRV260X_BRAKE_FACTOR_3X (2 << 4) | |
120 | #define DRV260X_BRAKE_FACTOR_4X (3 << 4) | |
121 | #define DRV260X_BRAKE_FACTOR_6X (4 << 4) | |
122 | #define DRV260X_BRAKE_FACTOR_8X (5 << 4) | |
123 | #define DRV260X_BRAKE_FACTOR_16 (6 << 4) | |
124 | #define DRV260X_BRAKE_FACTOR_DIS (7 << 4) | |
125 | ||
126 | #define DRV260X_LOOP_GAIN_LOW 0xf3 | |
127 | #define DRV260X_LOOP_GAIN_MED (1 << 2) | |
128 | #define DRV260X_LOOP_GAIN_HIGH (2 << 2) | |
129 | #define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2) | |
130 | ||
131 | #define DRV260X_BEMF_GAIN_0 0xfc | |
132 | #define DRV260X_BEMF_GAIN_1 (1 << 0) | |
133 | #define DRV260X_BEMF_GAIN_2 (2 << 0) | |
134 | #define DRV260X_BEMF_GAIN_3 (3 << 0) | |
135 | ||
136 | /* Control 1 register */ | |
137 | #define DRV260X_AC_CPLE_EN (1 << 5) | |
138 | #define DRV260X_STARTUP_BOOST (1 << 7) | |
139 | ||
140 | /* Control 2 register */ | |
141 | ||
142 | #define DRV260X_IDISS_TIME_45 0 | |
143 | #define DRV260X_IDISS_TIME_75 (1 << 0) | |
144 | #define DRV260X_IDISS_TIME_150 (1 << 1) | |
145 | #define DRV260X_IDISS_TIME_225 0x03 | |
146 | ||
147 | #define DRV260X_BLANK_TIME_45 (0 << 2) | |
148 | #define DRV260X_BLANK_TIME_75 (1 << 2) | |
149 | #define DRV260X_BLANK_TIME_150 (2 << 2) | |
150 | #define DRV260X_BLANK_TIME_225 (3 << 2) | |
151 | ||
152 | #define DRV260X_SAMP_TIME_150 (0 << 4) | |
153 | #define DRV260X_SAMP_TIME_200 (1 << 4) | |
154 | #define DRV260X_SAMP_TIME_250 (2 << 4) | |
155 | #define DRV260X_SAMP_TIME_300 (3 << 4) | |
156 | ||
157 | #define DRV260X_BRAKE_STABILIZER (1 << 6) | |
158 | #define DRV260X_UNIDIR_IN (0 << 7) | |
159 | #define DRV260X_BIDIR_IN (1 << 7) | |
160 | ||
161 | /* Control 3 Register */ | |
162 | #define DRV260X_LRA_OPEN_LOOP (1 << 0) | |
163 | #define DRV260X_ANANLOG_IN (1 << 1) | |
164 | #define DRV260X_LRA_DRV_MODE (1 << 2) | |
165 | #define DRV260X_RTP_UNSIGNED_DATA (1 << 3) | |
166 | #define DRV260X_SUPPLY_COMP_DIS (1 << 4) | |
167 | #define DRV260X_ERM_OPEN_LOOP (1 << 5) | |
168 | #define DRV260X_NG_THRESH_0 (0 << 6) | |
169 | #define DRV260X_NG_THRESH_2 (1 << 6) | |
170 | #define DRV260X_NG_THRESH_4 (2 << 6) | |
171 | #define DRV260X_NG_THRESH_8 (3 << 6) | |
172 | ||
173 | /* Control 4 Register */ | |
174 | #define DRV260X_AUTOCAL_TIME_150MS (0 << 4) | |
175 | #define DRV260X_AUTOCAL_TIME_250MS (1 << 4) | |
176 | #define DRV260X_AUTOCAL_TIME_500MS (2 << 4) | |
177 | #define DRV260X_AUTOCAL_TIME_1000MS (3 << 4) | |
178 | ||
179 | /** | |
180 | * struct drv260x_data - | |
181 | * @input_dev - Pointer to the input device | |
182 | * @client - Pointer to the I2C client | |
183 | * @regmap - Register map of the device | |
184 | * @work - Work item used to off load the enable/disable of the vibration | |
185 | * @enable_gpio - Pointer to the gpio used for enable/disabling | |
186 | * @regulator - Pointer to the regulator for the IC | |
187 | * @magnitude - Magnitude of the vibration event | |
188 | * @mode - The operating mode of the IC (LRA_NO_CAL, ERM or LRA) | |
189 | * @library - The vibration library to be used | |
190 | * @rated_voltage - The rated_voltage of the actuator | |
191 | * @overdriver_voltage - The over drive voltage of the actuator | |
192 | **/ | |
193 | struct drv260x_data { | |
194 | struct input_dev *input_dev; | |
195 | struct i2c_client *client; | |
196 | struct regmap *regmap; | |
197 | struct work_struct work; | |
198 | struct gpio_desc *enable_gpio; | |
199 | struct regulator *regulator; | |
200 | u32 magnitude; | |
201 | u32 mode; | |
202 | u32 library; | |
203 | int rated_voltage; | |
204 | int overdrive_voltage; | |
205 | }; | |
206 | ||
ec0843fa | 207 | static const struct reg_default drv260x_reg_defs[] = { |
7132fe4f DM |
208 | { DRV260X_STATUS, 0xe0 }, |
209 | { DRV260X_MODE, 0x40 }, | |
210 | { DRV260X_RT_PB_IN, 0x00 }, | |
211 | { DRV260X_LIB_SEL, 0x00 }, | |
212 | { DRV260X_WV_SEQ_1, 0x01 }, | |
213 | { DRV260X_WV_SEQ_2, 0x00 }, | |
214 | { DRV260X_WV_SEQ_3, 0x00 }, | |
215 | { DRV260X_WV_SEQ_4, 0x00 }, | |
216 | { DRV260X_WV_SEQ_5, 0x00 }, | |
217 | { DRV260X_WV_SEQ_6, 0x00 }, | |
218 | { DRV260X_WV_SEQ_7, 0x00 }, | |
219 | { DRV260X_WV_SEQ_8, 0x00 }, | |
220 | { DRV260X_GO, 0x00 }, | |
221 | { DRV260X_OVERDRIVE_OFF, 0x00 }, | |
222 | { DRV260X_SUSTAIN_P_OFF, 0x00 }, | |
223 | { DRV260X_SUSTAIN_N_OFF, 0x00 }, | |
224 | { DRV260X_BRAKE_OFF, 0x00 }, | |
225 | { DRV260X_A_TO_V_CTRL, 0x05 }, | |
226 | { DRV260X_A_TO_V_MIN_INPUT, 0x19 }, | |
227 | { DRV260X_A_TO_V_MAX_INPUT, 0xff }, | |
228 | { DRV260X_A_TO_V_MIN_OUT, 0x19 }, | |
229 | { DRV260X_A_TO_V_MAX_OUT, 0xff }, | |
230 | { DRV260X_RATED_VOLT, 0x3e }, | |
231 | { DRV260X_OD_CLAMP_VOLT, 0x8c }, | |
232 | { DRV260X_CAL_COMP, 0x0c }, | |
233 | { DRV260X_CAL_BACK_EMF, 0x6c }, | |
234 | { DRV260X_FEEDBACK_CTRL, 0x36 }, | |
235 | { DRV260X_CTRL1, 0x93 }, | |
236 | { DRV260X_CTRL2, 0xfa }, | |
237 | { DRV260X_CTRL3, 0xa0 }, | |
238 | { DRV260X_CTRL4, 0x20 }, | |
239 | { DRV260X_CTRL5, 0x80 }, | |
240 | { DRV260X_LRA_LOOP_PERIOD, 0x33 }, | |
241 | { DRV260X_VBAT_MON, 0x00 }, | |
242 | { DRV260X_LRA_RES_PERIOD, 0x00 }, | |
243 | }; | |
244 | ||
245 | #define DRV260X_DEF_RATED_VOLT 0x90 | |
246 | #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 | |
247 | ||
248 | /** | |
249 | * Rated and Overdriver Voltages: | |
250 | * Calculated using the formula r = v * 255 / 5.6 | |
251 | * where r is what will be written to the register | |
252 | * and v is the rated or overdriver voltage of the actuator | |
253 | **/ | |
254 | static int drv260x_calculate_voltage(unsigned int voltage) | |
255 | { | |
256 | return (voltage * 255 / 5600); | |
257 | } | |
258 | ||
259 | static void drv260x_worker(struct work_struct *work) | |
260 | { | |
261 | struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); | |
262 | int error; | |
263 | ||
264 | gpiod_set_value(haptics->enable_gpio, 1); | |
265 | /* Data sheet says to wait 250us before trying to communicate */ | |
266 | udelay(250); | |
267 | ||
268 | error = regmap_write(haptics->regmap, | |
269 | DRV260X_MODE, DRV260X_RT_PLAYBACK); | |
270 | if (error) { | |
271 | dev_err(&haptics->client->dev, | |
272 | "Failed to write set mode: %d\n", error); | |
273 | } else { | |
274 | error = regmap_write(haptics->regmap, | |
275 | DRV260X_RT_PB_IN, haptics->magnitude); | |
276 | if (error) | |
277 | dev_err(&haptics->client->dev, | |
278 | "Failed to set magnitude: %d\n", error); | |
279 | } | |
280 | } | |
281 | ||
282 | static int drv260x_haptics_play(struct input_dev *input, void *data, | |
283 | struct ff_effect *effect) | |
284 | { | |
285 | struct drv260x_data *haptics = input_get_drvdata(input); | |
286 | ||
287 | haptics->mode = DRV260X_LRA_NO_CAL_MODE; | |
288 | ||
289 | if (effect->u.rumble.strong_magnitude > 0) | |
290 | haptics->magnitude = effect->u.rumble.strong_magnitude; | |
291 | else if (effect->u.rumble.weak_magnitude > 0) | |
292 | haptics->magnitude = effect->u.rumble.weak_magnitude; | |
293 | else | |
294 | haptics->magnitude = 0; | |
295 | ||
296 | schedule_work(&haptics->work); | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | static void drv260x_close(struct input_dev *input) | |
302 | { | |
303 | struct drv260x_data *haptics = input_get_drvdata(input); | |
304 | int error; | |
305 | ||
306 | cancel_work_sync(&haptics->work); | |
307 | ||
308 | error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); | |
309 | if (error) | |
310 | dev_err(&haptics->client->dev, | |
311 | "Failed to enter standby mode: %d\n", error); | |
312 | ||
313 | gpiod_set_value(haptics->enable_gpio, 0); | |
314 | } | |
315 | ||
8019ff6c | 316 | static const struct reg_sequence drv260x_lra_cal_regs[] = { |
7132fe4f DM |
317 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
318 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 }, | |
319 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | | |
320 | DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, | |
321 | }; | |
322 | ||
8019ff6c | 323 | static const struct reg_sequence drv260x_lra_init_regs[] = { |
7132fe4f DM |
324 | { DRV260X_MODE, DRV260X_RT_PLAYBACK }, |
325 | { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | | |
326 | DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, | |
327 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, | |
328 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, | |
329 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, | |
330 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, | |
331 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | | |
332 | DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | | |
333 | DRV260X_BEMF_GAIN_3 }, | |
334 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, | |
335 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, | |
336 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN }, | |
337 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, | |
338 | }; | |
339 | ||
8019ff6c | 340 | static const struct reg_sequence drv260x_erm_cal_regs[] = { |
7132fe4f DM |
341 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
342 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, | |
343 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, | |
344 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, | |
345 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, | |
346 | { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | | |
347 | DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, | |
348 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, | |
349 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | | |
350 | DRV260X_IDISS_TIME_75 }, | |
351 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP }, | |
352 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, | |
353 | }; | |
354 | ||
355 | static int drv260x_init(struct drv260x_data *haptics) | |
356 | { | |
357 | int error; | |
358 | unsigned int cal_buf; | |
359 | ||
360 | error = regmap_write(haptics->regmap, | |
361 | DRV260X_RATED_VOLT, haptics->rated_voltage); | |
362 | if (error) { | |
363 | dev_err(&haptics->client->dev, | |
364 | "Failed to write DRV260X_RATED_VOLT register: %d\n", | |
365 | error); | |
366 | return error; | |
367 | } | |
368 | ||
369 | error = regmap_write(haptics->regmap, | |
370 | DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); | |
371 | if (error) { | |
372 | dev_err(&haptics->client->dev, | |
373 | "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n", | |
374 | error); | |
375 | return error; | |
376 | } | |
377 | ||
378 | switch (haptics->mode) { | |
379 | case DRV260X_LRA_MODE: | |
380 | error = regmap_register_patch(haptics->regmap, | |
381 | drv260x_lra_cal_regs, | |
382 | ARRAY_SIZE(drv260x_lra_cal_regs)); | |
383 | if (error) { | |
384 | dev_err(&haptics->client->dev, | |
385 | "Failed to write LRA calibration registers: %d\n", | |
386 | error); | |
387 | return error; | |
388 | } | |
389 | ||
390 | break; | |
391 | ||
392 | case DRV260X_ERM_MODE: | |
393 | error = regmap_register_patch(haptics->regmap, | |
394 | drv260x_erm_cal_regs, | |
395 | ARRAY_SIZE(drv260x_erm_cal_regs)); | |
396 | if (error) { | |
397 | dev_err(&haptics->client->dev, | |
398 | "Failed to write ERM calibration registers: %d\n", | |
399 | error); | |
400 | return error; | |
401 | } | |
402 | ||
403 | error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, | |
404 | DRV260X_LIB_SEL_MASK, | |
405 | haptics->library); | |
406 | if (error) { | |
407 | dev_err(&haptics->client->dev, | |
408 | "Failed to write DRV260X_LIB_SEL register: %d\n", | |
409 | error); | |
410 | return error; | |
411 | } | |
412 | ||
413 | break; | |
414 | ||
415 | default: | |
416 | error = regmap_register_patch(haptics->regmap, | |
417 | drv260x_lra_init_regs, | |
418 | ARRAY_SIZE(drv260x_lra_init_regs)); | |
419 | if (error) { | |
420 | dev_err(&haptics->client->dev, | |
421 | "Failed to write LRA init registers: %d\n", | |
422 | error); | |
423 | return error; | |
424 | } | |
425 | ||
426 | error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, | |
427 | DRV260X_LIB_SEL_MASK, | |
428 | haptics->library); | |
429 | if (error) { | |
430 | dev_err(&haptics->client->dev, | |
431 | "Failed to write DRV260X_LIB_SEL register: %d\n", | |
432 | error); | |
433 | return error; | |
434 | } | |
435 | ||
436 | /* No need to set GO bit here */ | |
437 | return 0; | |
438 | } | |
439 | ||
440 | error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); | |
441 | if (error) { | |
442 | dev_err(&haptics->client->dev, | |
443 | "Failed to write GO register: %d\n", | |
444 | error); | |
445 | return error; | |
446 | } | |
447 | ||
448 | do { | |
449 | error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); | |
450 | if (error) { | |
451 | dev_err(&haptics->client->dev, | |
452 | "Failed to read GO register: %d\n", | |
453 | error); | |
454 | return error; | |
455 | } | |
456 | } while (cal_buf == DRV260X_GO_BIT); | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static const struct regmap_config drv260x_regmap_config = { | |
462 | .reg_bits = 8, | |
463 | .val_bits = 8, | |
464 | ||
465 | .max_register = DRV260X_MAX_REG, | |
466 | .reg_defaults = drv260x_reg_defs, | |
467 | .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs), | |
468 | .cache_type = REGCACHE_NONE, | |
469 | }; | |
470 | ||
471 | #ifdef CONFIG_OF | |
472 | static int drv260x_parse_dt(struct device *dev, | |
473 | struct drv260x_data *haptics) | |
474 | { | |
475 | struct device_node *np = dev->of_node; | |
476 | unsigned int voltage; | |
477 | int error; | |
478 | ||
479 | error = of_property_read_u32(np, "mode", &haptics->mode); | |
480 | if (error) { | |
481 | dev_err(dev, "%s: No entry for mode\n", __func__); | |
482 | return error; | |
483 | } | |
484 | ||
485 | error = of_property_read_u32(np, "library-sel", &haptics->library); | |
486 | if (error) { | |
487 | dev_err(dev, "%s: No entry for library selection\n", | |
488 | __func__); | |
489 | return error; | |
490 | } | |
491 | ||
492 | error = of_property_read_u32(np, "vib-rated-mv", &voltage); | |
493 | if (!error) | |
494 | haptics->rated_voltage = drv260x_calculate_voltage(voltage); | |
495 | ||
496 | ||
497 | error = of_property_read_u32(np, "vib-overdrive-mv", &voltage); | |
498 | if (!error) | |
499 | haptics->overdrive_voltage = drv260x_calculate_voltage(voltage); | |
500 | ||
501 | return 0; | |
502 | } | |
503 | #else | |
504 | static inline int drv260x_parse_dt(struct device *dev, | |
505 | struct drv260x_data *haptics) | |
506 | { | |
507 | dev_err(dev, "no platform data defined\n"); | |
508 | ||
509 | return -EINVAL; | |
510 | } | |
511 | #endif | |
512 | ||
513 | static int drv260x_probe(struct i2c_client *client, | |
514 | const struct i2c_device_id *id) | |
515 | { | |
516 | const struct drv260x_platform_data *pdata = dev_get_platdata(&client->dev); | |
517 | struct drv260x_data *haptics; | |
518 | int error; | |
519 | ||
520 | haptics = devm_kzalloc(&client->dev, sizeof(*haptics), GFP_KERNEL); | |
521 | if (!haptics) | |
522 | return -ENOMEM; | |
523 | ||
524 | haptics->rated_voltage = DRV260X_DEF_OD_CLAMP_VOLT; | |
525 | haptics->rated_voltage = DRV260X_DEF_RATED_VOLT; | |
526 | ||
527 | if (pdata) { | |
528 | haptics->mode = pdata->mode; | |
529 | haptics->library = pdata->library_selection; | |
530 | if (pdata->vib_overdrive_voltage) | |
531 | haptics->overdrive_voltage = drv260x_calculate_voltage(pdata->vib_overdrive_voltage); | |
532 | if (pdata->vib_rated_voltage) | |
533 | haptics->rated_voltage = drv260x_calculate_voltage(pdata->vib_rated_voltage); | |
534 | } else if (client->dev.of_node) { | |
535 | error = drv260x_parse_dt(&client->dev, haptics); | |
536 | if (error) | |
537 | return error; | |
538 | } else { | |
539 | dev_err(&client->dev, "Platform data not set\n"); | |
540 | return -ENODEV; | |
541 | } | |
542 | ||
543 | ||
544 | if (haptics->mode < DRV260X_LRA_MODE || | |
545 | haptics->mode > DRV260X_ERM_MODE) { | |
546 | dev_err(&client->dev, | |
547 | "Vibrator mode is invalid: %i\n", | |
548 | haptics->mode); | |
549 | return -EINVAL; | |
550 | } | |
551 | ||
552 | if (haptics->library < DRV260X_LIB_EMPTY || | |
553 | haptics->library > DRV260X_ERM_LIB_F) { | |
554 | dev_err(&client->dev, | |
555 | "Library value is invalid: %i\n", haptics->library); | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | if (haptics->mode == DRV260X_LRA_MODE && | |
560 | haptics->library != DRV260X_LIB_EMPTY && | |
561 | haptics->library != DRV260X_LIB_LRA) { | |
562 | dev_err(&client->dev, | |
563 | "LRA Mode with ERM Library mismatch\n"); | |
564 | return -EINVAL; | |
565 | } | |
566 | ||
dddf3bc4 DM |
567 | if (haptics->mode == DRV260X_ERM_MODE && |
568 | (haptics->library == DRV260X_LIB_EMPTY || | |
569 | haptics->library == DRV260X_LIB_LRA)) { | |
570 | dev_err(&client->dev, | |
571 | "ERM Mode with LRA Library mismatch\n"); | |
572 | return -EINVAL; | |
573 | } | |
574 | ||
7132fe4f DM |
575 | haptics->regulator = devm_regulator_get(&client->dev, "vbat"); |
576 | if (IS_ERR(haptics->regulator)) { | |
577 | error = PTR_ERR(haptics->regulator); | |
578 | dev_err(&client->dev, | |
579 | "unable to get regulator, error: %d\n", error); | |
580 | return error; | |
581 | } | |
582 | ||
ea0afac4 UKK |
583 | haptics->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable", |
584 | GPIOD_OUT_HIGH); | |
585 | if (IS_ERR(haptics->enable_gpio)) | |
586 | return PTR_ERR(haptics->enable_gpio); | |
7132fe4f DM |
587 | |
588 | haptics->input_dev = devm_input_allocate_device(&client->dev); | |
589 | if (!haptics->input_dev) { | |
590 | dev_err(&client->dev, "Failed to allocate input device\n"); | |
591 | return -ENOMEM; | |
592 | } | |
593 | ||
594 | haptics->input_dev->name = "drv260x:haptics"; | |
595 | haptics->input_dev->dev.parent = client->dev.parent; | |
596 | haptics->input_dev->close = drv260x_close; | |
597 | input_set_drvdata(haptics->input_dev, haptics); | |
598 | input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); | |
599 | ||
600 | error = input_ff_create_memless(haptics->input_dev, NULL, | |
601 | drv260x_haptics_play); | |
602 | if (error) { | |
603 | dev_err(&client->dev, "input_ff_create() failed: %d\n", | |
604 | error); | |
605 | return error; | |
606 | } | |
607 | ||
608 | INIT_WORK(&haptics->work, drv260x_worker); | |
609 | ||
610 | haptics->client = client; | |
611 | i2c_set_clientdata(client, haptics); | |
612 | ||
613 | haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); | |
614 | if (IS_ERR(haptics->regmap)) { | |
615 | error = PTR_ERR(haptics->regmap); | |
616 | dev_err(&client->dev, "Failed to allocate register map: %d\n", | |
617 | error); | |
618 | return error; | |
619 | } | |
620 | ||
621 | error = drv260x_init(haptics); | |
622 | if (error) { | |
623 | dev_err(&client->dev, "Device init failed: %d\n", error); | |
624 | return error; | |
625 | } | |
626 | ||
627 | error = input_register_device(haptics->input_dev); | |
628 | if (error) { | |
629 | dev_err(&client->dev, "couldn't register input device: %d\n", | |
630 | error); | |
631 | return error; | |
632 | } | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
97a652a8 | 637 | static int __maybe_unused drv260x_suspend(struct device *dev) |
7132fe4f DM |
638 | { |
639 | struct drv260x_data *haptics = dev_get_drvdata(dev); | |
640 | int ret = 0; | |
641 | ||
642 | mutex_lock(&haptics->input_dev->mutex); | |
643 | ||
644 | if (haptics->input_dev->users) { | |
645 | ret = regmap_update_bits(haptics->regmap, | |
646 | DRV260X_MODE, | |
647 | DRV260X_STANDBY_MASK, | |
648 | DRV260X_STANDBY); | |
649 | if (ret) { | |
650 | dev_err(dev, "Failed to set standby mode\n"); | |
651 | goto out; | |
652 | } | |
653 | ||
654 | gpiod_set_value(haptics->enable_gpio, 0); | |
655 | ||
656 | ret = regulator_disable(haptics->regulator); | |
657 | if (ret) { | |
658 | dev_err(dev, "Failed to disable regulator\n"); | |
659 | regmap_update_bits(haptics->regmap, | |
660 | DRV260X_MODE, | |
661 | DRV260X_STANDBY_MASK, 0); | |
662 | } | |
663 | } | |
664 | out: | |
665 | mutex_unlock(&haptics->input_dev->mutex); | |
666 | return ret; | |
667 | } | |
668 | ||
97a652a8 | 669 | static int __maybe_unused drv260x_resume(struct device *dev) |
7132fe4f DM |
670 | { |
671 | struct drv260x_data *haptics = dev_get_drvdata(dev); | |
672 | int ret = 0; | |
673 | ||
674 | mutex_lock(&haptics->input_dev->mutex); | |
675 | ||
676 | if (haptics->input_dev->users) { | |
677 | ret = regulator_enable(haptics->regulator); | |
678 | if (ret) { | |
679 | dev_err(dev, "Failed to enable regulator\n"); | |
680 | goto out; | |
681 | } | |
682 | ||
683 | ret = regmap_update_bits(haptics->regmap, | |
684 | DRV260X_MODE, | |
685 | DRV260X_STANDBY_MASK, 0); | |
686 | if (ret) { | |
687 | dev_err(dev, "Failed to unset standby mode\n"); | |
688 | regulator_disable(haptics->regulator); | |
689 | goto out; | |
690 | } | |
691 | ||
692 | gpiod_set_value(haptics->enable_gpio, 1); | |
693 | } | |
694 | ||
695 | out: | |
696 | mutex_unlock(&haptics->input_dev->mutex); | |
697 | return ret; | |
698 | } | |
7132fe4f DM |
699 | |
700 | static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); | |
701 | ||
702 | static const struct i2c_device_id drv260x_id[] = { | |
703 | { "drv2605l", 0 }, | |
704 | { } | |
705 | }; | |
706 | MODULE_DEVICE_TABLE(i2c, drv260x_id); | |
707 | ||
708 | #ifdef CONFIG_OF | |
709 | static const struct of_device_id drv260x_of_match[] = { | |
710 | { .compatible = "ti,drv2604", }, | |
711 | { .compatible = "ti,drv2604l", }, | |
712 | { .compatible = "ti,drv2605", }, | |
713 | { .compatible = "ti,drv2605l", }, | |
714 | { } | |
715 | }; | |
716 | MODULE_DEVICE_TABLE(of, drv260x_of_match); | |
717 | #endif | |
718 | ||
719 | static struct i2c_driver drv260x_driver = { | |
720 | .probe = drv260x_probe, | |
721 | .driver = { | |
722 | .name = "drv260x-haptics", | |
7132fe4f DM |
723 | .of_match_table = of_match_ptr(drv260x_of_match), |
724 | .pm = &drv260x_pm_ops, | |
725 | }, | |
726 | .id_table = drv260x_id, | |
727 | }; | |
728 | module_i2c_driver(drv260x_driver); | |
729 | ||
7132fe4f DM |
730 | MODULE_DESCRIPTION("TI DRV260x haptics driver"); |
731 | MODULE_LICENSE("GPL"); | |
732 | MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); |