1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * ADXL345/346 Three-Axis Digital Accelerometers 4 * 5 * Enter bugs at http://blackfin.uclinux.org/ 6 * 7 * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. 8 */ 9 10#include <linux/device.h> 11#include <linux/delay.h> 12#include <linux/input.h> 13#include <linux/interrupt.h> 14#include <linux/irq.h> 15#include <linux/slab.h> 16#include <linux/workqueue.h> 17#include <linux/input/adxl34x.h> 18#include <linux/module.h> 19 20#include "adxl34x.h" 21 22/* ADXL345/6 Register Map */ 23#define DEVID 0x00 /* R Device ID */ 24#define THRESH_TAP 0x1D /* R/W Tap threshold */ 25#define OFSX 0x1E /* R/W X-axis offset */ 26#define OFSY 0x1F /* R/W Y-axis offset */ 27#define OFSZ 0x20 /* R/W Z-axis offset */ 28#define DUR 0x21 /* R/W Tap duration */ 29#define LATENT 0x22 /* R/W Tap latency */ 30#define WINDOW 0x23 /* R/W Tap window */ 31#define THRESH_ACT 0x24 /* R/W Activity threshold */ 32#define THRESH_INACT 0x25 /* R/W Inactivity threshold */ 33#define TIME_INACT 0x26 /* R/W Inactivity time */ 34#define ACT_INACT_CTL 0x27 /* R/W Axis enable control for activity and */ 35 /* inactivity detection */ 36#define THRESH_FF 0x28 /* R/W Free-fall threshold */ 37#define TIME_FF 0x29 /* R/W Free-fall time */ 38#define TAP_AXES 0x2A /* R/W Axis control for tap/double tap */ 39#define ACT_TAP_STATUS 0x2B /* R Source of tap/double tap */ 40#define BW_RATE 0x2C /* R/W Data rate and power mode control */ 41#define POWER_CTL 0x2D /* R/W Power saving features control */ 42#define INT_ENABLE 0x2E /* R/W Interrupt enable control */ 43#define INT_MAP 0x2F /* R/W Interrupt mapping control */ 44#define INT_SOURCE 0x30 /* R Source of interrupts */ 45#define DATA_FORMAT 0x31 /* R/W Data format control */ 46#define DATAX0 0x32 /* R X-Axis Data 0 */ 47#define DATAX1 0x33 /* R X-Axis Data 1 */ 48#define DATAY0 0x34 /* R Y-Axis Data 0 */ 49#define DATAY1 0x35 /* R Y-Axis Data 1 */ 50#define DATAZ0 0x36 /* R Z-Axis Data 0 */ 51#define DATAZ1 0x37 /* R Z-Axis Data 1 */ 52#define FIFO_CTL 0x38 /* R/W FIFO control */ 53#define FIFO_STATUS 0x39 /* R FIFO status */ 54#define TAP_SIGN 0x3A /* R Sign and source for tap/double tap */ 55/* Orientation ADXL346 only */ 56#define ORIENT_CONF 0x3B /* R/W Orientation configuration */ 57#define ORIENT 0x3C /* R Orientation status */ 58 59/* DEVIDs */ 60#define ID_ADXL345 0xE5 61#define ID_ADXL346 0xE6 62 63/* INT_ENABLE/INT_MAP/INT_SOURCE Bits */ 64#define DATA_READY (1 << 7) 65#define SINGLE_TAP (1 << 6) 66#define DOUBLE_TAP (1 << 5) 67#define ACTIVITY (1 << 4) 68#define INACTIVITY (1 << 3) 69#define FREE_FALL (1 << 2) 70#define WATERMARK (1 << 1) 71#define OVERRUN (1 << 0) 72 73/* ACT_INACT_CONTROL Bits */ 74#define ACT_ACDC (1 << 7) 75#define ACT_X_EN (1 << 6) 76#define ACT_Y_EN (1 << 5) 77#define ACT_Z_EN (1 << 4) 78#define INACT_ACDC (1 << 3) 79#define INACT_X_EN (1 << 2) 80#define INACT_Y_EN (1 << 1) 81#define INACT_Z_EN (1 << 0) 82 83/* TAP_AXES Bits */ 84#define SUPPRESS (1 << 3) 85#define TAP_X_EN (1 << 2) 86#define TAP_Y_EN (1 << 1) 87#define TAP_Z_EN (1 << 0) 88 89/* ACT_TAP_STATUS Bits */ 90#define ACT_X_SRC (1 << 6) 91#define ACT_Y_SRC (1 << 5) 92#define ACT_Z_SRC (1 << 4) 93#define ASLEEP (1 << 3) 94#define TAP_X_SRC (1 << 2) 95#define TAP_Y_SRC (1 << 1) 96#define TAP_Z_SRC (1 << 0) 97 98/* BW_RATE Bits */ 99#define LOW_POWER (1 << 4) 100#define RATE(x) ((x) & 0xF) 101 102/* POWER_CTL Bits */ 103#define PCTL_LINK (1 << 5) 104#define PCTL_AUTO_SLEEP (1 << 4) 105#define PCTL_MEASURE (1 << 3) 106#define PCTL_SLEEP (1 << 2) 107#define PCTL_WAKEUP(x) ((x) & 0x3) 108 109/* DATA_FORMAT Bits */ 110#define SELF_TEST (1 << 7) 111#define SPI (1 << 6) 112#define INT_INVERT (1 << 5) 113#define FULL_RES (1 << 3) 114#define JUSTIFY (1 << 2) 115#define RANGE(x) ((x) & 0x3) 116#define RANGE_PM_2g 0 117#define RANGE_PM_4g 1 118#define RANGE_PM_8g 2 119#define RANGE_PM_16g 3 120 121/* 122 * Maximum value our axis may get in full res mode for the input device 123 * (signed 13 bits) 124 */ 125#define ADXL_FULLRES_MAX_VAL 4096 126 127/* 128 * Maximum value our axis may get in fixed res mode for the input device 129 * (signed 10 bits) 130 */ 131#define ADXL_FIXEDRES_MAX_VAL 512 132 133/* FIFO_CTL Bits */ 134#define FIFO_MODE(x) (((x) & 0x3) << 6) 135#define FIFO_BYPASS 0 136#define FIFO_FIFO 1 137#define FIFO_STREAM 2 138#define FIFO_TRIGGER 3 139#define TRIGGER (1 << 5) 140#define SAMPLES(x) ((x) & 0x1F) 141 142/* FIFO_STATUS Bits */ 143#define FIFO_TRIG (1 << 7) 144#define ENTRIES(x) ((x) & 0x3F) 145 146/* TAP_SIGN Bits ADXL346 only */ 147#define XSIGN (1 << 6) 148#define YSIGN (1 << 5) 149#define ZSIGN (1 << 4) 150#define XTAP (1 << 3) 151#define YTAP (1 << 2) 152#define ZTAP (1 << 1) 153 154/* ORIENT_CONF ADXL346 only */ 155#define ORIENT_DEADZONE(x) (((x) & 0x7) << 4) 156#define ORIENT_DIVISOR(x) ((x) & 0x7) 157 158/* ORIENT ADXL346 only */ 159#define ADXL346_2D_VALID (1 << 6) 160#define ADXL346_2D_ORIENT(x) (((x) & 0x30) >> 4) 161#define ADXL346_3D_VALID (1 << 3) 162#define ADXL346_3D_ORIENT(x) ((x) & 0x7) 163#define ADXL346_2D_PORTRAIT_POS 0 /* +X */ 164#define ADXL346_2D_PORTRAIT_NEG 1 /* -X */ 165#define ADXL346_2D_LANDSCAPE_POS 2 /* +Y */ 166#define ADXL346_2D_LANDSCAPE_NEG 3 /* -Y */ 167 168#define ADXL346_3D_FRONT 3 /* +X */ 169#define ADXL346_3D_BACK 4 /* -X */ 170#define ADXL346_3D_RIGHT 2 /* +Y */ 171#define ADXL346_3D_LEFT 5 /* -Y */ 172#define ADXL346_3D_TOP 1 /* +Z */ 173#define ADXL346_3D_BOTTOM 6 /* -Z */ 174 175#undef ADXL_DEBUG 176 177#define ADXL_X_AXIS 0 178#define ADXL_Y_AXIS 1 179#define ADXL_Z_AXIS 2 180 181#define AC_READ(ac, reg) ((ac)->bops->read((ac)->dev, reg)) 182#define AC_WRITE(ac, reg, val) ((ac)->bops->write((ac)->dev, reg, val)) 183 184struct axis_triple { 185 int x; 186 int y; 187 int z; 188}; 189 190struct adxl34x { 191 struct device *dev; 192 struct input_dev *input; 193 struct mutex mutex; /* reentrant protection for struct */ 194 struct adxl34x_platform_data pdata; 195 struct axis_triple swcal; 196 struct axis_triple hwcal; 197 struct axis_triple saved; 198 char phys[32]; 199 unsigned orient2d_saved; 200 unsigned orient3d_saved; 201 bool disabled; /* P: mutex */ 202 bool opened; /* P: mutex */ 203 bool suspended; /* P: mutex */ 204 bool fifo_delay; 205 int irq; 206 unsigned model; 207 unsigned int_mask; 208 209 const struct adxl34x_bus_ops *bops; 210}; 211 212static const struct adxl34x_platform_data adxl34x_default_init = { 213 .tap_threshold = 35, 214 .tap_duration = 3, 215 .tap_latency = 20, 216 .tap_window = 20, 217 .tap_axis_control = ADXL_TAP_X_EN | ADXL_TAP_Y_EN | ADXL_TAP_Z_EN, 218 .act_axis_control = 0xFF, 219 .activity_threshold = 6, 220 .inactivity_threshold = 4, 221 .inactivity_time = 3, 222 .free_fall_threshold = 8, 223 .free_fall_time = 0x20, 224 .data_rate = 8, 225 .data_range = ADXL_FULL_RES, 226 227 .ev_type = EV_ABS, 228 .ev_code_x = ABS_X, /* EV_REL */ 229 .ev_code_y = ABS_Y, /* EV_REL */ 230 .ev_code_z = ABS_Z, /* EV_REL */ 231 232 .ev_code_tap = {BTN_TOUCH, BTN_TOUCH, BTN_TOUCH}, /* EV_KEY {x,y,z} */ 233 .power_mode = ADXL_AUTO_SLEEP | ADXL_LINK, 234 .fifo_mode = ADXL_FIFO_STREAM, 235 .watermark = 0, 236}; 237 238static void adxl34x_get_triple(struct adxl34x *ac, struct axis_triple *axis) 239{ 240 __le16 buf[3]; 241 242 ac->bops->read_block(ac->dev, DATAX0, DATAZ1 - DATAX0 + 1, buf); 243 244 mutex_lock(&ac->mutex); 245 ac->saved.x = (s16) le16_to_cpu(buf[0]); 246 axis->x = ac->saved.x; 247 248 ac->saved.y = (s16) le16_to_cpu(buf[1]); 249 axis->y = ac->saved.y; 250 251 ac->saved.z = (s16) le16_to_cpu(buf[2]); 252 axis->z = ac->saved.z; 253 mutex_unlock(&ac->mutex); 254} 255 256static void adxl34x_service_ev_fifo(struct adxl34x *ac) 257{ 258 struct adxl34x_platform_data *pdata = &ac->pdata; 259 struct axis_triple axis; 260 261 adxl34x_get_triple(ac, &axis); 262 263 input_event(ac->input, pdata->ev_type, pdata->ev_code_x, 264 axis.x - ac->swcal.x); 265 input_event(ac->input, pdata->ev_type, pdata->ev_code_y, 266 axis.y - ac->swcal.y); 267 input_event(ac->input, pdata->ev_type, pdata->ev_code_z, 268 axis.z - ac->swcal.z); 269} 270 271static void adxl34x_report_key_single(struct input_dev *input, int key) 272{ 273 input_report_key(input, key, true); 274 input_sync(input); 275 input_report_key(input, key, false); 276} 277 278static void adxl34x_send_key_events(struct adxl34x *ac, 279 struct adxl34x_platform_data *pdata, int status, int press) 280{ 281 int i; 282 283 for (i = ADXL_X_AXIS; i <= ADXL_Z_AXIS; i++) { 284 if (status & (1 << (ADXL_Z_AXIS - i))) 285 input_report_key(ac->input, 286 pdata->ev_code_tap[i], press); 287 } 288} 289 290static void adxl34x_do_tap(struct adxl34x *ac, 291 struct adxl34x_platform_data *pdata, int status) 292{ 293 adxl34x_send_key_events(ac, pdata, status, true); 294 input_sync(ac->input); 295 adxl34x_send_key_events(ac, pdata, status, false); 296} 297 298static irqreturn_t adxl34x_irq(int irq, void *handle) 299{ 300 struct adxl34x *ac = handle; 301 struct adxl34x_platform_data *pdata = &ac->pdata; 302 int int_stat, tap_stat, samples, orient, orient_code; 303 304 /* 305 * ACT_TAP_STATUS should be read before clearing the interrupt 306 * Avoid reading ACT_TAP_STATUS in case TAP detection is disabled 307 */ 308 309 if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) 310 tap_stat = AC_READ(ac, ACT_TAP_STATUS); 311 else 312 tap_stat = 0; 313 314 int_stat = AC_READ(ac, INT_SOURCE); 315 316 if (int_stat & FREE_FALL) 317 adxl34x_report_key_single(ac->input, pdata->ev_code_ff); 318 319 if (int_stat & OVERRUN) 320 dev_dbg(ac->dev, "OVERRUN\n"); 321 322 if (int_stat & (SINGLE_TAP | DOUBLE_TAP)) { 323 adxl34x_do_tap(ac, pdata, tap_stat); 324 325 if (int_stat & DOUBLE_TAP) 326 adxl34x_do_tap(ac, pdata, tap_stat); 327 } 328 329 if (pdata->ev_code_act_inactivity) { 330 if (int_stat & ACTIVITY) 331 input_report_key(ac->input, 332 pdata->ev_code_act_inactivity, 1); 333 if (int_stat & INACTIVITY) 334 input_report_key(ac->input, 335 pdata->ev_code_act_inactivity, 0); 336 } 337 338 /* 339 * ORIENTATION SENSING ADXL346 only 340 */ 341 if (pdata->orientation_enable) { 342 orient = AC_READ(ac, ORIENT); 343 if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_2D) && 344 (orient & ADXL346_2D_VALID)) { 345 346 orient_code = ADXL346_2D_ORIENT(orient); 347 /* Report orientation only when it changes */ 348 if (ac->orient2d_saved != orient_code) { 349 ac->orient2d_saved = orient_code; 350 adxl34x_report_key_single(ac->input, 351 pdata->ev_codes_orient_2d[orient_code]); 352 } 353 } 354 355 if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_3D) && 356 (orient & ADXL346_3D_VALID)) { 357 358 orient_code = ADXL346_3D_ORIENT(orient) - 1; 359 /* Report orientation only when it changes */ 360 if (ac->orient3d_saved != orient_code) { 361 ac->orient3d_saved = orient_code; 362 adxl34x_report_key_single(ac->input, 363 pdata->ev_codes_orient_3d[orient_code]); 364 } 365 } 366 } 367 368 if (int_stat & (DATA_READY | WATERMARK)) { 369 370 if (pdata->fifo_mode) 371 samples = ENTRIES(AC_READ(ac, FIFO_STATUS)) + 1; 372 else 373 samples = 1; 374 375 for (; samples > 0; samples--) { 376 adxl34x_service_ev_fifo(ac); 377 /* 378 * To ensure that the FIFO has 379 * completely popped, there must be at least 5 us between 380 * the end of reading the data registers, signified by the 381 * transition to register 0x38 from 0x37 or the CS pin 382 * going high, and the start of new reads of the FIFO or 383 * reading the FIFO_STATUS register. For SPI operation at 384 * 1.5 MHz or lower, the register addressing portion of the 385 * transmission is sufficient delay to ensure the FIFO has 386 * completely popped. It is necessary for SPI operation 387 * greater than 1.5 MHz to de-assert the CS pin to ensure a 388 * total of 5 us, which is at most 3.4 us at 5 MHz 389 * operation. 390 */ 391 if (ac->fifo_delay && (samples > 1)) 392 udelay(3); 393 } 394 } 395 396 input_sync(ac->input); 397 398 return IRQ_HANDLED; 399} 400 401static void __adxl34x_disable(struct adxl34x *ac) 402{ 403 /* 404 * A '0' places the ADXL34x into standby mode 405 * with minimum power consumption. 406 */ 407 AC_WRITE(ac, POWER_CTL, 0); 408} 409 410static void __adxl34x_enable(struct adxl34x *ac) 411{ 412 AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); 413} 414 415static int adxl34x_suspend(struct device *dev) 416{ 417 struct adxl34x *ac = dev_get_drvdata(dev); 418 419 mutex_lock(&ac->mutex); 420 421 if (!ac->suspended && !ac->disabled && ac->opened) 422 __adxl34x_disable(ac); 423 424 ac->suspended = true; 425 426 mutex_unlock(&ac->mutex); 427 428 return 0; 429} 430 431static int adxl34x_resume(struct device *dev) 432{ 433 struct adxl34x *ac = dev_get_drvdata(dev); 434 435 mutex_lock(&ac->mutex); 436 437 if (ac->suspended && !ac->disabled && ac->opened) 438 __adxl34x_enable(ac); 439 440 ac->suspended = false; 441 442 mutex_unlock(&ac->mutex); 443 444 return 0; 445} 446 447static ssize_t adxl34x_disable_show(struct device *dev, 448 struct device_attribute *attr, char *buf) 449{ 450 struct adxl34x *ac = dev_get_drvdata(dev); 451 452 return sprintf(buf, "%u\n", ac->disabled); 453} 454 455static ssize_t adxl34x_disable_store(struct device *dev, 456 struct device_attribute *attr, 457 const char *buf, size_t count) 458{ 459 struct adxl34x *ac = dev_get_drvdata(dev); 460 unsigned int val; 461 int error; 462 463 error = kstrtouint(buf, 10, &val); 464 if (error) 465 return error; 466 467 mutex_lock(&ac->mutex); 468 469 if (!ac->suspended && ac->opened) { 470 if (val) { 471 if (!ac->disabled) 472 __adxl34x_disable(ac); 473 } else { 474 if (ac->disabled) 475 __adxl34x_enable(ac); 476 } 477 } 478 479 ac->disabled = !!val; 480 481 mutex_unlock(&ac->mutex); 482 483 return count; 484} 485 486static DEVICE_ATTR(disable, 0664, adxl34x_disable_show, adxl34x_disable_store); 487 488static ssize_t adxl34x_calibrate_show(struct device *dev, 489 struct device_attribute *attr, char *buf) 490{ 491 struct adxl34x *ac = dev_get_drvdata(dev); 492 ssize_t count; 493 494 mutex_lock(&ac->mutex); 495 count = sprintf(buf, "%d,%d,%d\n", 496 ac->hwcal.x * 4 + ac->swcal.x, 497 ac->hwcal.y * 4 + ac->swcal.y, 498 ac->hwcal.z * 4 + ac->swcal.z); 499 mutex_unlock(&ac->mutex); 500 501 return count; 502} 503 504static ssize_t adxl34x_calibrate_store(struct device *dev, 505 struct device_attribute *attr, 506 const char *buf, size_t count) 507{ 508 struct adxl34x *ac = dev_get_drvdata(dev); 509 510 /* 511 * Hardware offset calibration has a resolution of 15.6 mg/LSB. 512 * We use HW calibration and handle the remaining bits in SW. (4mg/LSB) 513 */ 514 515 mutex_lock(&ac->mutex); 516 ac->hwcal.x -= (ac->saved.x / 4); 517 ac->swcal.x = ac->saved.x % 4; 518 519 ac->hwcal.y -= (ac->saved.y / 4); 520 ac->swcal.y = ac->saved.y % 4; 521 522 ac->hwcal.z -= (ac->saved.z / 4); 523 ac->swcal.z = ac->saved.z % 4; 524 525 AC_WRITE(ac, OFSX, (s8) ac->hwcal.x); 526 AC_WRITE(ac, OFSY, (s8) ac->hwcal.y); 527 AC_WRITE(ac, OFSZ, (s8) ac->hwcal.z); 528 mutex_unlock(&ac->mutex); 529 530 return count; 531} 532 533static DEVICE_ATTR(calibrate, 0664, 534 adxl34x_calibrate_show, adxl34x_calibrate_store); 535 536static ssize_t adxl34x_rate_show(struct device *dev, 537 struct device_attribute *attr, char *buf) 538{ 539 struct adxl34x *ac = dev_get_drvdata(dev); 540 541 return sprintf(buf, "%u\n", RATE(ac->pdata.data_rate)); 542} 543 544static ssize_t adxl34x_rate_store(struct device *dev, 545 struct device_attribute *attr, 546 const char *buf, size_t count) 547{ 548 struct adxl34x *ac = dev_get_drvdata(dev); 549 unsigned char val; 550 int error; 551 552 error = kstrtou8(buf, 10, &val); 553 if (error) 554 return error; 555 556 mutex_lock(&ac->mutex); 557 558 ac->pdata.data_rate = RATE(val); 559 AC_WRITE(ac, BW_RATE, 560 ac->pdata.data_rate | 561 (ac->pdata.low_power_mode ? LOW_POWER : 0)); 562 563 mutex_unlock(&ac->mutex); 564 565 return count; 566} 567 568static DEVICE_ATTR(rate, 0664, adxl34x_rate_show, adxl34x_rate_store); 569 570static ssize_t adxl34x_autosleep_show(struct device *dev, 571 struct device_attribute *attr, char *buf) 572{ 573 struct adxl34x *ac = dev_get_drvdata(dev); 574 575 return sprintf(buf, "%u\n", 576 ac->pdata.power_mode & (PCTL_AUTO_SLEEP | PCTL_LINK) ? 1 : 0); 577} 578 579static ssize_t adxl34x_autosleep_store(struct device *dev, 580 struct device_attribute *attr, 581 const char *buf, size_t count) 582{ 583 struct adxl34x *ac = dev_get_drvdata(dev); 584 unsigned int val; 585 int error; 586 587 error = kstrtouint(buf, 10, &val); 588 if (error) 589 return error; 590 591 mutex_lock(&ac->mutex); 592 593 if (val) 594 ac->pdata.power_mode |= (PCTL_AUTO_SLEEP | PCTL_LINK); 595 else 596 ac->pdata.power_mode &= ~(PCTL_AUTO_SLEEP | PCTL_LINK); 597 598 if (!ac->disabled && !ac->suspended && ac->opened) 599 AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); 600 601 mutex_unlock(&ac->mutex); 602 603 return count; 604} 605 606static DEVICE_ATTR(autosleep, 0664, 607 adxl34x_autosleep_show, adxl34x_autosleep_store); 608 609static ssize_t adxl34x_position_show(struct device *dev, 610 struct device_attribute *attr, char *buf) 611{ 612 struct adxl34x *ac = dev_get_drvdata(dev); 613 ssize_t count; 614 615 mutex_lock(&ac->mutex); 616 count = sprintf(buf, "(%d, %d, %d)\n", 617 ac->saved.x, ac->saved.y, ac->saved.z); 618 mutex_unlock(&ac->mutex); 619 620 return count; 621} 622 623static DEVICE_ATTR(position, S_IRUGO, adxl34x_position_show, NULL); 624 625#ifdef ADXL_DEBUG 626static ssize_t adxl34x_write_store(struct device *dev, 627 struct device_attribute *attr, 628 const char *buf, size_t count) 629{ 630 struct adxl34x *ac = dev_get_drvdata(dev); 631 unsigned int val; 632 int error; 633 634 /* 635 * This allows basic ADXL register write access for debug purposes. 636 */ 637 error = kstrtouint(buf, 16, &val); 638 if (error) 639 return error; 640 641 mutex_lock(&ac->mutex); 642 AC_WRITE(ac, val >> 8, val & 0xFF); 643 mutex_unlock(&ac->mutex); 644 645 return count; 646} 647 648static DEVICE_ATTR(write, 0664, NULL, adxl34x_write_store); 649#endif 650 651static struct attribute *adxl34x_attributes[] = { 652 &dev_attr_disable.attr, 653 &dev_attr_calibrate.attr, 654 &dev_attr_rate.attr, 655 &dev_attr_autosleep.attr, 656 &dev_attr_position.attr, 657#ifdef ADXL_DEBUG 658 &dev_attr_write.attr, 659#endif 660 NULL 661}; 662 663static const struct attribute_group adxl34x_attr_group = { 664 .attrs = adxl34x_attributes, 665}; 666 667static int adxl34x_input_open(struct input_dev *input) 668{ 669 struct adxl34x *ac = input_get_drvdata(input); 670 671 mutex_lock(&ac->mutex); 672 673 if (!ac->suspended && !ac->disabled) 674 __adxl34x_enable(ac); 675 676 ac->opened = true; 677 678 mutex_unlock(&ac->mutex); 679 680 return 0; 681} 682 683static void adxl34x_input_close(struct input_dev *input) 684{ 685 struct adxl34x *ac = input_get_drvdata(input); 686 687 mutex_lock(&ac->mutex); 688 689 if (!ac->suspended && !ac->disabled) 690 __adxl34x_disable(ac); 691 692 ac->opened = false; 693 694 mutex_unlock(&ac->mutex); 695} 696 697struct adxl34x *adxl34x_probe(struct device *dev, int irq, 698 bool fifo_delay_default, 699 const struct adxl34x_bus_ops *bops) 700{ 701 struct adxl34x *ac; 702 struct input_dev *input_dev; 703 const struct adxl34x_platform_data *pdata; 704 int err, range, i; 705 int revid; 706 707 if (!irq) { 708 dev_err(dev, "no IRQ?\n"); 709 err = -ENODEV; 710 goto err_out; 711 } 712 713 ac = kzalloc(sizeof(*ac), GFP_KERNEL); 714 input_dev = input_allocate_device(); 715 if (!ac || !input_dev) { 716 err = -ENOMEM; 717 goto err_free_mem; 718 } 719 720 ac->fifo_delay = fifo_delay_default; 721 722 pdata = dev_get_platdata(dev); 723 if (!pdata) { 724 dev_dbg(dev, 725 "No platform data: Using default initialization\n"); 726 pdata = &adxl34x_default_init; 727 } 728 729 ac->pdata = *pdata; 730 pdata = &ac->pdata; 731 732 ac->input = input_dev; 733 ac->dev = dev; 734 ac->irq = irq; 735 ac->bops = bops; 736 737 mutex_init(&ac->mutex); 738 739 input_dev->name = "ADXL34x accelerometer"; 740 revid = AC_READ(ac, DEVID); 741 742 switch (revid) { 743 case ID_ADXL345: 744 ac->model = 345; 745 break; 746 case ID_ADXL346: 747 ac->model = 346; 748 break; 749 default: 750 dev_err(dev, "Failed to probe %s\n", input_dev->name); 751 err = -ENODEV; 752 goto err_free_mem; 753 } 754 755 snprintf(ac->phys, sizeof(ac->phys), "%s/input0", dev_name(dev)); 756 757 input_dev->phys = ac->phys; 758 input_dev->dev.parent = dev; 759 input_dev->id.product = ac->model; 760 input_dev->id.bustype = bops->bustype; 761 input_dev->open = adxl34x_input_open; 762 input_dev->close = adxl34x_input_close; 763 764 input_set_drvdata(input_dev, ac); 765 766 __set_bit(ac->pdata.ev_type, input_dev->evbit); 767 768 if (ac->pdata.ev_type == EV_REL) { 769 __set_bit(REL_X, input_dev->relbit); 770 __set_bit(REL_Y, input_dev->relbit); 771 __set_bit(REL_Z, input_dev->relbit); 772 } else { 773 /* EV_ABS */ 774 __set_bit(ABS_X, input_dev->absbit); 775 __set_bit(ABS_Y, input_dev->absbit); 776 __set_bit(ABS_Z, input_dev->absbit); 777 778 if (pdata->data_range & FULL_RES) 779 range = ADXL_FULLRES_MAX_VAL; /* Signed 13-bit */ 780 else 781 range = ADXL_FIXEDRES_MAX_VAL; /* Signed 10-bit */ 782 783 input_set_abs_params(input_dev, ABS_X, -range, range, 3, 3); 784 input_set_abs_params(input_dev, ABS_Y, -range, range, 3, 3); 785 input_set_abs_params(input_dev, ABS_Z, -range, range, 3, 3); 786 } 787 788 __set_bit(EV_KEY, input_dev->evbit); 789 __set_bit(pdata->ev_code_tap[ADXL_X_AXIS], input_dev->keybit); 790 __set_bit(pdata->ev_code_tap[ADXL_Y_AXIS], input_dev->keybit); 791 __set_bit(pdata->ev_code_tap[ADXL_Z_AXIS], input_dev->keybit); 792 793 if (pdata->ev_code_ff) { 794 ac->int_mask = FREE_FALL; 795 __set_bit(pdata->ev_code_ff, input_dev->keybit); 796 } 797 798 if (pdata->ev_code_act_inactivity) 799 __set_bit(pdata->ev_code_act_inactivity, input_dev->keybit); 800 801 ac->int_mask |= ACTIVITY | INACTIVITY; 802 803 if (pdata->watermark) { 804 ac->int_mask |= WATERMARK; 805 if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS) 806 ac->pdata.fifo_mode |= FIFO_STREAM; 807 } else { 808 ac->int_mask |= DATA_READY; 809 } 810 811 if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) 812 ac->int_mask |= SINGLE_TAP | DOUBLE_TAP; 813 814 if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS) 815 ac->fifo_delay = false; 816 817 AC_WRITE(ac, POWER_CTL, 0); 818 819 err = request_threaded_irq(ac->irq, NULL, adxl34x_irq, 820 IRQF_ONESHOT, dev_name(dev), ac); 821 if (err) { 822 dev_err(dev, "irq %d busy?\n", ac->irq); 823 goto err_free_mem; 824 } 825 826 err = sysfs_create_group(&dev->kobj, &adxl34x_attr_group); 827 if (err) 828 goto err_free_irq; 829 830 err = input_register_device(input_dev); 831 if (err) 832 goto err_remove_attr; 833 834 AC_WRITE(ac, OFSX, pdata->x_axis_offset); 835 ac->hwcal.x = pdata->x_axis_offset; 836 AC_WRITE(ac, OFSY, pdata->y_axis_offset); 837 ac->hwcal.y = pdata->y_axis_offset; 838 AC_WRITE(ac, OFSZ, pdata->z_axis_offset); 839 ac->hwcal.z = pdata->z_axis_offset; 840 AC_WRITE(ac, THRESH_TAP, pdata->tap_threshold); 841 AC_WRITE(ac, DUR, pdata->tap_duration); 842 AC_WRITE(ac, LATENT, pdata->tap_latency); 843 AC_WRITE(ac, WINDOW, pdata->tap_window); 844 AC_WRITE(ac, THRESH_ACT, pdata->activity_threshold); 845 AC_WRITE(ac, THRESH_INACT, pdata->inactivity_threshold); 846 AC_WRITE(ac, TIME_INACT, pdata->inactivity_time); 847 AC_WRITE(ac, THRESH_FF, pdata->free_fall_threshold); 848 AC_WRITE(ac, TIME_FF, pdata->free_fall_time); 849 AC_WRITE(ac, TAP_AXES, pdata->tap_axis_control); 850 AC_WRITE(ac, ACT_INACT_CTL, pdata->act_axis_control); 851 AC_WRITE(ac, BW_RATE, RATE(ac->pdata.data_rate) | 852 (pdata->low_power_mode ? LOW_POWER : 0)); 853 AC_WRITE(ac, DATA_FORMAT, pdata->data_range); 854 AC_WRITE(ac, FIFO_CTL, FIFO_MODE(pdata->fifo_mode) | 855 SAMPLES(pdata->watermark)); 856 857 if (pdata->use_int2) { 858 /* Map all INTs to INT2 */ 859 AC_WRITE(ac, INT_MAP, ac->int_mask | OVERRUN); 860 } else { 861 /* Map all INTs to INT1 */ 862 AC_WRITE(ac, INT_MAP, 0); 863 } 864 865 if (ac->model == 346 && ac->pdata.orientation_enable) { 866 AC_WRITE(ac, ORIENT_CONF, 867 ORIENT_DEADZONE(ac->pdata.deadzone_angle) | 868 ORIENT_DIVISOR(ac->pdata.divisor_length)); 869 870 ac->orient2d_saved = 1234; 871 ac->orient3d_saved = 1234; 872 873 if (pdata->orientation_enable & ADXL_EN_ORIENTATION_3D) 874 for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_3d); i++) 875 __set_bit(pdata->ev_codes_orient_3d[i], 876 input_dev->keybit); 877 878 if (pdata->orientation_enable & ADXL_EN_ORIENTATION_2D) 879 for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_2d); i++) 880 __set_bit(pdata->ev_codes_orient_2d[i], 881 input_dev->keybit); 882 } else { 883 ac->pdata.orientation_enable = 0; 884 } 885 886 AC_WRITE(ac, INT_ENABLE, ac->int_mask | OVERRUN); 887 888 ac->pdata.power_mode &= (PCTL_AUTO_SLEEP | PCTL_LINK); 889 890 return ac; 891 892 err_remove_attr: 893 sysfs_remove_group(&dev->kobj, &adxl34x_attr_group); 894 err_free_irq: 895 free_irq(ac->irq, ac); 896 err_free_mem: 897 input_free_device(input_dev); 898 kfree(ac); 899 err_out: 900 return ERR_PTR(err); 901} 902EXPORT_SYMBOL_GPL(adxl34x_probe); 903 904void adxl34x_remove(struct adxl34x *ac) 905{ 906 sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group); 907 free_irq(ac->irq, ac); 908 input_unregister_device(ac->input); 909 dev_dbg(ac->dev, "unregistered accelerometer\n"); 910 kfree(ac); 911} 912EXPORT_SYMBOL_GPL(adxl34x_remove); 913 914EXPORT_GPL_SIMPLE_DEV_PM_OPS(adxl34x_pm, adxl34x_suspend, adxl34x_resume); 915 916MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); 917MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer Driver"); 918MODULE_LICENSE("GPL"); 919