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**/ 193struct 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 207static 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 **/ 254static int drv260x_calculate_voltage(unsigned int voltage) 255{ 256 return (voltage * 255 / 5600); 257} 258 259static 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 282static 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 301static 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 316static 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 323static 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 340static 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 355static 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 461static 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 472static 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 504static 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 513static 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#ifdef CONFIG_PM_SLEEP 643static int drv260x_suspend(struct device *dev) 644{ 645 struct drv260x_data *haptics = dev_get_drvdata(dev); 646 int ret = 0; 647 648 mutex_lock(&haptics->input_dev->mutex); 649 650 if (haptics->input_dev->users) { 651 ret = regmap_update_bits(haptics->regmap, 652 DRV260X_MODE, 653 DRV260X_STANDBY_MASK, 654 DRV260X_STANDBY); 655 if (ret) { 656 dev_err(dev, "Failed to set standby mode\n"); 657 goto out; 658 } 659 660 gpiod_set_value(haptics->enable_gpio, 0); 661 662 ret = regulator_disable(haptics->regulator); 663 if (ret) { 664 dev_err(dev, "Failed to disable regulator\n"); 665 regmap_update_bits(haptics->regmap, 666 DRV260X_MODE, 667 DRV260X_STANDBY_MASK, 0); 668 } 669 } 670out: 671 mutex_unlock(&haptics->input_dev->mutex); 672 return ret; 673} 674 675static int drv260x_resume(struct device *dev) 676{ 677 struct drv260x_data *haptics = dev_get_drvdata(dev); 678 int ret = 0; 679 680 mutex_lock(&haptics->input_dev->mutex); 681 682 if (haptics->input_dev->users) { 683 ret = regulator_enable(haptics->regulator); 684 if (ret) { 685 dev_err(dev, "Failed to enable regulator\n"); 686 goto out; 687 } 688 689 ret = regmap_update_bits(haptics->regmap, 690 DRV260X_MODE, 691 DRV260X_STANDBY_MASK, 0); 692 if (ret) { 693 dev_err(dev, "Failed to unset standby mode\n"); 694 regulator_disable(haptics->regulator); 695 goto out; 696 } 697 698 gpiod_set_value(haptics->enable_gpio, 1); 699 } 700 701out: 702 mutex_unlock(&haptics->input_dev->mutex); 703 return ret; 704} 705#endif 706 707static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 708 709static const struct i2c_device_id drv260x_id[] = { 710 { "drv2605l", 0 }, 711 { } 712}; 713MODULE_DEVICE_TABLE(i2c, drv260x_id); 714 715#ifdef CONFIG_OF 716static const struct of_device_id drv260x_of_match[] = { 717 { .compatible = "ti,drv2604", }, 718 { .compatible = "ti,drv2604l", }, 719 { .compatible = "ti,drv2605", }, 720 { .compatible = "ti,drv2605l", }, 721 { } 722}; 723MODULE_DEVICE_TABLE(of, drv260x_of_match); 724#endif 725 726static struct i2c_driver drv260x_driver = { 727 .probe = drv260x_probe, 728 .driver = { 729 .name = "drv260x-haptics", 730 .owner = THIS_MODULE, 731 .of_match_table = of_match_ptr(drv260x_of_match), 732 .pm = &drv260x_pm_ops, 733 }, 734 .id_table = drv260x_id, 735}; 736module_i2c_driver(drv260x_driver); 737 738MODULE_ALIAS("platform:drv260x-haptics"); 739MODULE_DESCRIPTION("TI DRV260x haptics driver"); 740MODULE_LICENSE("GPL"); 741MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 742