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 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 }; 206 207 static struct reg_default drv260x_reg_defs[] = { 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 } 315 316 static const struct reg_default drv260x_lra_cal_regs[] = { 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 }; 322 323 static const struct reg_default drv260x_lra_init_regs[] = { 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 }; 339 340 static const struct reg_default drv260x_erm_cal_regs[] = { 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 } 566 567 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 } 574 575 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 } 582 583 haptics->enable_gpio = devm_gpiod_get(&client->dev, "enable"); 584 if (IS_ERR(haptics->enable_gpio)) { 585 error = PTR_ERR(haptics->enable_gpio); 586 if (error != -ENOENT && error != -ENOSYS) 587 return error; 588 haptics->enable_gpio = NULL; 589 } else { 590 gpiod_direction_output(haptics->enable_gpio, 1); 591 } 592 593 haptics->input_dev = devm_input_allocate_device(&client->dev); 594 if (!haptics->input_dev) { 595 dev_err(&client->dev, "Failed to allocate input device\n"); 596 return -ENOMEM; 597 } 598 599 haptics->input_dev->name = "drv260x:haptics"; 600 haptics->input_dev->dev.parent = client->dev.parent; 601 haptics->input_dev->close = drv260x_close; 602 input_set_drvdata(haptics->input_dev, haptics); 603 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); 604 605 error = input_ff_create_memless(haptics->input_dev, NULL, 606 drv260x_haptics_play); 607 if (error) { 608 dev_err(&client->dev, "input_ff_create() failed: %d\n", 609 error); 610 return error; 611 } 612 613 INIT_WORK(&haptics->work, drv260x_worker); 614 615 haptics->client = client; 616 i2c_set_clientdata(client, haptics); 617 618 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); 619 if (IS_ERR(haptics->regmap)) { 620 error = PTR_ERR(haptics->regmap); 621 dev_err(&client->dev, "Failed to allocate register map: %d\n", 622 error); 623 return error; 624 } 625 626 error = drv260x_init(haptics); 627 if (error) { 628 dev_err(&client->dev, "Device init failed: %d\n", error); 629 return error; 630 } 631 632 error = input_register_device(haptics->input_dev); 633 if (error) { 634 dev_err(&client->dev, "couldn't register input device: %d\n", 635 error); 636 return error; 637 } 638 639 return 0; 640 } 641 642 static int __maybe_unused drv260x_suspend(struct device *dev) 643 { 644 struct drv260x_data *haptics = dev_get_drvdata(dev); 645 int ret = 0; 646 647 mutex_lock(&haptics->input_dev->mutex); 648 649 if (haptics->input_dev->users) { 650 ret = regmap_update_bits(haptics->regmap, 651 DRV260X_MODE, 652 DRV260X_STANDBY_MASK, 653 DRV260X_STANDBY); 654 if (ret) { 655 dev_err(dev, "Failed to set standby mode\n"); 656 goto out; 657 } 658 659 gpiod_set_value(haptics->enable_gpio, 0); 660 661 ret = regulator_disable(haptics->regulator); 662 if (ret) { 663 dev_err(dev, "Failed to disable regulator\n"); 664 regmap_update_bits(haptics->regmap, 665 DRV260X_MODE, 666 DRV260X_STANDBY_MASK, 0); 667 } 668 } 669 out: 670 mutex_unlock(&haptics->input_dev->mutex); 671 return ret; 672 } 673 674 static int __maybe_unused drv260x_resume(struct device *dev) 675 { 676 struct drv260x_data *haptics = dev_get_drvdata(dev); 677 int ret = 0; 678 679 mutex_lock(&haptics->input_dev->mutex); 680 681 if (haptics->input_dev->users) { 682 ret = regulator_enable(haptics->regulator); 683 if (ret) { 684 dev_err(dev, "Failed to enable regulator\n"); 685 goto out; 686 } 687 688 ret = regmap_update_bits(haptics->regmap, 689 DRV260X_MODE, 690 DRV260X_STANDBY_MASK, 0); 691 if (ret) { 692 dev_err(dev, "Failed to unset standby mode\n"); 693 regulator_disable(haptics->regulator); 694 goto out; 695 } 696 697 gpiod_set_value(haptics->enable_gpio, 1); 698 } 699 700 out: 701 mutex_unlock(&haptics->input_dev->mutex); 702 return ret; 703 } 704 705 static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 706 707 static const struct i2c_device_id drv260x_id[] = { 708 { "drv2605l", 0 }, 709 { } 710 }; 711 MODULE_DEVICE_TABLE(i2c, drv260x_id); 712 713 #ifdef CONFIG_OF 714 static const struct of_device_id drv260x_of_match[] = { 715 { .compatible = "ti,drv2604", }, 716 { .compatible = "ti,drv2604l", }, 717 { .compatible = "ti,drv2605", }, 718 { .compatible = "ti,drv2605l", }, 719 { } 720 }; 721 MODULE_DEVICE_TABLE(of, drv260x_of_match); 722 #endif 723 724 static struct i2c_driver drv260x_driver = { 725 .probe = drv260x_probe, 726 .driver = { 727 .name = "drv260x-haptics", 728 .owner = THIS_MODULE, 729 .of_match_table = of_match_ptr(drv260x_of_match), 730 .pm = &drv260x_pm_ops, 731 }, 732 .id_table = drv260x_id, 733 }; 734 module_i2c_driver(drv260x_driver); 735 736 MODULE_DESCRIPTION("TI DRV260x haptics driver"); 737 MODULE_LICENSE("GPL"); 738 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 739