1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor 4 * 5 * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com> 6 * 7 * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net> 8 * 9 * SPI is not supported by driver 10 * BMA023/BMA150/SMB380: 7-bit I2C slave address 0x38 11 * BMA180: 7-bit I2C slave address 0x40 or 0x41 12 * BMA250: 7-bit I2C slave address 0x18 or 0x19 13 */ 14 15 #include <linux/module.h> 16 #include <linux/mod_devicetable.h> 17 #include <linux/i2c.h> 18 #include <linux/interrupt.h> 19 #include <linux/delay.h> 20 #include <linux/bitops.h> 21 #include <linux/regulator/consumer.h> 22 #include <linux/slab.h> 23 #include <linux/string.h> 24 #include <linux/types.h> 25 #include <linux/iio/iio.h> 26 #include <linux/iio/sysfs.h> 27 #include <linux/iio/buffer.h> 28 #include <linux/iio/trigger.h> 29 #include <linux/iio/trigger_consumer.h> 30 #include <linux/iio/triggered_buffer.h> 31 32 #define BMA180_DRV_NAME "bma180" 33 #define BMA180_IRQ_NAME "bma180_event" 34 35 enum chip_ids { 36 BMA023, 37 BMA150, 38 BMA180, 39 BMA250, 40 }; 41 42 struct bma180_data; 43 44 struct bma180_part_info { 45 u8 chip_id; 46 const struct iio_chan_spec *channels; 47 unsigned int num_channels; 48 const int *scale_table; 49 unsigned int num_scales; 50 const int *bw_table; 51 unsigned int num_bw; 52 int temp_offset; 53 54 u8 int_reset_reg, int_reset_mask; 55 u8 sleep_reg, sleep_mask; 56 u8 bw_reg, bw_mask, bw_offset; 57 u8 scale_reg, scale_mask; 58 u8 power_reg, power_mask, lowpower_val; 59 u8 int_enable_reg, int_enable_mask; 60 u8 softreset_reg, softreset_val; 61 62 int (*chip_config)(struct bma180_data *data); 63 void (*chip_disable)(struct bma180_data *data); 64 }; 65 66 /* Register set */ 67 #define BMA023_CTRL_REG0 0x0a 68 #define BMA023_CTRL_REG1 0x0b 69 #define BMA023_CTRL_REG2 0x14 70 #define BMA023_CTRL_REG3 0x15 71 72 #define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */ 73 #define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */ 74 #define BMA023_SLEEP BIT(0) 75 #define BMA023_INT_RESET_MASK BIT(6) 76 #define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */ 77 #define BMA023_RESET_VAL BIT(1) 78 79 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */ 80 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */ 81 #define BMA180_TEMP 0x08 82 #define BMA180_CTRL_REG0 0x0d 83 #define BMA180_RESET 0x10 84 #define BMA180_BW_TCS 0x20 85 #define BMA180_CTRL_REG3 0x21 86 #define BMA180_TCO_Z 0x30 87 #define BMA180_OFFSET_LSB1 0x35 88 89 /* BMA180_CTRL_REG0 bits */ 90 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */ 91 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */ 92 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */ 93 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */ 94 95 /* BMA180_CTRL_REG3 bits */ 96 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */ 97 98 /* BMA180_OFFSET_LSB1 skipping mode bit */ 99 #define BMA180_SMP_SKIP BIT(0) 100 101 /* Bit masks for registers bit fields */ 102 #define BMA180_RANGE 0x0e /* Range of measured accel values */ 103 #define BMA180_BW 0xf0 /* Accel bandwidth */ 104 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */ 105 106 /* We have to write this value in reset register to do soft reset */ 107 #define BMA180_RESET_VAL 0xb6 108 109 #define BMA023_ID_REG_VAL 0x02 110 #define BMA180_ID_REG_VAL 0x03 111 #define BMA250_ID_REG_VAL 0x03 112 113 /* Chip power modes */ 114 #define BMA180_LOW_POWER 0x03 115 116 #define BMA250_RANGE_REG 0x0f 117 #define BMA250_BW_REG 0x10 118 #define BMA250_POWER_REG 0x11 119 #define BMA250_RESET_REG 0x14 120 #define BMA250_INT_ENABLE_REG 0x17 121 #define BMA250_INT_MAP_REG 0x1a 122 #define BMA250_INT_RESET_REG 0x21 123 124 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */ 125 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */ 126 #define BMA250_BW_OFFSET 8 127 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */ 128 #define BMA250_LOWPOWER_MASK BIT(6) 129 #define BMA250_DATA_INTEN_MASK BIT(4) 130 #define BMA250_INT1_DATA_MASK BIT(0) 131 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */ 132 133 struct bma180_data { 134 struct regulator *vdd_supply; 135 struct regulator *vddio_supply; 136 struct i2c_client *client; 137 struct iio_trigger *trig; 138 const struct bma180_part_info *part_info; 139 struct iio_mount_matrix orientation; 140 struct mutex mutex; 141 bool sleep_state; 142 int scale; 143 int bw; 144 bool pmode; 145 /* Ensure timestamp is naturally aligned */ 146 struct { 147 s16 chan[4]; 148 aligned_s64 timestamp; 149 } scan; 150 }; 151 152 enum bma180_chan { 153 AXIS_X, 154 AXIS_Y, 155 AXIS_Z, 156 TEMP 157 }; 158 159 static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */ 160 static int bma023_scale_table[] = { 2452, 4903, 9709, }; 161 162 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */ 163 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 }; 164 165 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250, 500, 1000 }; /* Hz */ 166 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0, 167 0, 0, 306458 }; 168 169 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan) 170 { 171 int ret; 172 173 if (data->sleep_state) 174 return -EBUSY; 175 176 switch (chan) { 177 case TEMP: 178 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP); 179 if (ret < 0) 180 dev_err(&data->client->dev, "failed to read temp register\n"); 181 break; 182 default: 183 ret = i2c_smbus_read_word_data(data->client, 184 BMA180_ACC_X_LSB + chan * 2); 185 if (ret < 0) 186 dev_err(&data->client->dev, 187 "failed to read accel_%c register\n", 188 'x' + chan); 189 } 190 191 return ret; 192 } 193 194 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val) 195 { 196 int ret = i2c_smbus_read_byte_data(data->client, reg); 197 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1)); 198 199 if (ret < 0) 200 return ret; 201 202 return i2c_smbus_write_byte_data(data->client, reg, reg_val); 203 } 204 205 static int bma180_reset_intr(struct bma180_data *data) 206 { 207 int ret = bma180_set_bits(data, data->part_info->int_reset_reg, 208 data->part_info->int_reset_mask, 1); 209 210 if (ret) 211 dev_err(&data->client->dev, "failed to reset interrupt\n"); 212 213 return ret; 214 } 215 216 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state) 217 { 218 int ret = bma180_set_bits(data, data->part_info->int_enable_reg, 219 data->part_info->int_enable_mask, state); 220 if (ret) 221 goto err; 222 ret = bma180_reset_intr(data); 223 if (ret) 224 goto err; 225 226 return 0; 227 228 err: 229 dev_err(&data->client->dev, 230 "failed to set new data interrupt state %d\n", state); 231 return ret; 232 } 233 234 static int bma180_set_sleep_state(struct bma180_data *data, bool state) 235 { 236 int ret = bma180_set_bits(data, data->part_info->sleep_reg, 237 data->part_info->sleep_mask, state); 238 239 if (ret) { 240 dev_err(&data->client->dev, 241 "failed to set sleep state %d\n", state); 242 return ret; 243 } 244 data->sleep_state = state; 245 246 return 0; 247 } 248 249 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state) 250 { 251 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state); 252 253 if (ret) 254 dev_err(&data->client->dev, 255 "failed to set ee writing state %d\n", state); 256 257 return ret; 258 } 259 260 static int bma180_set_bw(struct bma180_data *data, int val) 261 { 262 int ret, i; 263 264 if (data->sleep_state) 265 return -EBUSY; 266 267 for (i = 0; i < data->part_info->num_bw; ++i) { 268 if (data->part_info->bw_table[i] == val) { 269 ret = bma180_set_bits(data, data->part_info->bw_reg, 270 data->part_info->bw_mask, 271 i + data->part_info->bw_offset); 272 if (ret) { 273 dev_err(&data->client->dev, 274 "failed to set bandwidth\n"); 275 return ret; 276 } 277 data->bw = val; 278 return 0; 279 } 280 } 281 282 return -EINVAL; 283 } 284 285 static int bma180_set_scale(struct bma180_data *data, int val) 286 { 287 int ret, i; 288 289 if (data->sleep_state) 290 return -EBUSY; 291 292 for (i = 0; i < data->part_info->num_scales; ++i) 293 if (data->part_info->scale_table[i] == val) { 294 ret = bma180_set_bits(data, data->part_info->scale_reg, 295 data->part_info->scale_mask, i); 296 if (ret) { 297 dev_err(&data->client->dev, 298 "failed to set scale\n"); 299 return ret; 300 } 301 data->scale = val; 302 return 0; 303 } 304 305 return -EINVAL; 306 } 307 308 static int bma180_set_pmode(struct bma180_data *data, bool mode) 309 { 310 u8 reg_val = mode ? data->part_info->lowpower_val : 0; 311 int ret = bma180_set_bits(data, data->part_info->power_reg, 312 data->part_info->power_mask, reg_val); 313 314 if (ret) { 315 dev_err(&data->client->dev, "failed to set power mode\n"); 316 return ret; 317 } 318 data->pmode = mode; 319 320 return 0; 321 } 322 323 static int bma180_soft_reset(struct bma180_data *data) 324 { 325 int ret = i2c_smbus_write_byte_data(data->client, 326 data->part_info->softreset_reg, 327 data->part_info->softreset_val); 328 329 if (ret) 330 dev_err(&data->client->dev, "failed to reset the chip\n"); 331 332 return ret; 333 } 334 335 static int bma180_chip_init(struct bma180_data *data) 336 { 337 /* Try to read chip_id register. It must return 0x03. */ 338 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID); 339 340 if (ret < 0) 341 return ret; 342 if (ret != data->part_info->chip_id) { 343 dev_err(&data->client->dev, "wrong chip ID %d expected %d\n", 344 ret, data->part_info->chip_id); 345 return -ENODEV; 346 } 347 348 ret = bma180_soft_reset(data); 349 if (ret) 350 return ret; 351 /* 352 * No serial transaction should occur within minimum 10 us 353 * after soft_reset command 354 */ 355 msleep(20); 356 357 return bma180_set_new_data_intr_state(data, false); 358 } 359 360 static int bma023_chip_config(struct bma180_data *data) 361 { 362 int ret = bma180_chip_init(data); 363 364 if (ret) 365 goto err; 366 367 ret = bma180_set_bw(data, 50); /* 50 Hz */ 368 if (ret) 369 goto err; 370 ret = bma180_set_scale(data, 2452); /* 2 G */ 371 if (ret) 372 goto err; 373 374 return 0; 375 376 err: 377 dev_err(&data->client->dev, "failed to config the chip\n"); 378 return ret; 379 } 380 381 static int bma180_chip_config(struct bma180_data *data) 382 { 383 int ret = bma180_chip_init(data); 384 385 if (ret) 386 goto err; 387 ret = bma180_set_pmode(data, false); 388 if (ret) 389 goto err; 390 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1); 391 if (ret) 392 goto err; 393 ret = bma180_set_ee_writing_state(data, true); 394 if (ret) 395 goto err; 396 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1); 397 if (ret) 398 goto err; 399 ret = bma180_set_bw(data, 20); /* 20 Hz */ 400 if (ret) 401 goto err; 402 ret = bma180_set_scale(data, 2452); /* 2 G */ 403 if (ret) 404 goto err; 405 406 return 0; 407 408 err: 409 dev_err(&data->client->dev, "failed to config the chip\n"); 410 return ret; 411 } 412 413 static int bma250_chip_config(struct bma180_data *data) 414 { 415 int ret = bma180_chip_init(data); 416 417 if (ret) 418 goto err; 419 ret = bma180_set_pmode(data, false); 420 if (ret) 421 goto err; 422 ret = bma180_set_bw(data, 16); /* 16 Hz */ 423 if (ret) 424 goto err; 425 ret = bma180_set_scale(data, 38344); /* 2 G */ 426 if (ret) 427 goto err; 428 /* 429 * This enables dataready interrupt on the INT1 pin 430 * FIXME: support using the INT2 pin 431 */ 432 ret = bma180_set_bits(data, BMA250_INT_MAP_REG, BMA250_INT1_DATA_MASK, 1); 433 if (ret) 434 goto err; 435 436 return 0; 437 438 err: 439 dev_err(&data->client->dev, "failed to config the chip\n"); 440 return ret; 441 } 442 443 static void bma023_chip_disable(struct bma180_data *data) 444 { 445 if (bma180_set_sleep_state(data, true)) 446 goto err; 447 448 return; 449 450 err: 451 dev_err(&data->client->dev, "failed to disable the chip\n"); 452 } 453 454 static void bma180_chip_disable(struct bma180_data *data) 455 { 456 if (bma180_set_new_data_intr_state(data, false)) 457 goto err; 458 if (bma180_set_ee_writing_state(data, false)) 459 goto err; 460 if (bma180_set_sleep_state(data, true)) 461 goto err; 462 463 return; 464 465 err: 466 dev_err(&data->client->dev, "failed to disable the chip\n"); 467 } 468 469 static void bma250_chip_disable(struct bma180_data *data) 470 { 471 if (bma180_set_new_data_intr_state(data, false)) 472 goto err; 473 if (bma180_set_sleep_state(data, true)) 474 goto err; 475 476 return; 477 478 err: 479 dev_err(&data->client->dev, "failed to disable the chip\n"); 480 } 481 482 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n, 483 bool micros) 484 { 485 size_t len = 0; 486 int i; 487 488 for (i = 0; i < n; i++) { 489 if (!vals[i]) 490 continue; 491 len += scnprintf(buf + len, PAGE_SIZE - len, 492 micros ? "0.%06d " : "%d ", vals[i]); 493 } 494 buf[len - 1] = '\n'; 495 496 return len; 497 } 498 499 static ssize_t bma180_show_filter_freq_avail(struct device *dev, 500 struct device_attribute *attr, char *buf) 501 { 502 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); 503 504 return bma180_show_avail(buf, data->part_info->bw_table, 505 data->part_info->num_bw, false); 506 } 507 508 static ssize_t bma180_show_scale_avail(struct device *dev, 509 struct device_attribute *attr, char *buf) 510 { 511 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); 512 513 return bma180_show_avail(buf, data->part_info->scale_table, 514 data->part_info->num_scales, true); 515 } 516 517 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, 518 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0); 519 520 static IIO_DEVICE_ATTR(in_accel_scale_available, 521 S_IRUGO, bma180_show_scale_avail, NULL, 0); 522 523 static struct attribute *bma180_attributes[] = { 524 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available. 525 dev_attr.attr, 526 &iio_dev_attr_in_accel_scale_available.dev_attr.attr, 527 NULL, 528 }; 529 530 static const struct attribute_group bma180_attrs_group = { 531 .attrs = bma180_attributes, 532 }; 533 534 static int bma180_read_raw(struct iio_dev *indio_dev, 535 struct iio_chan_spec const *chan, int *val, int *val2, 536 long mask) 537 { 538 struct bma180_data *data = iio_priv(indio_dev); 539 int ret; 540 541 switch (mask) { 542 case IIO_CHAN_INFO_RAW: 543 if (!iio_device_claim_direct(indio_dev)) 544 return -EBUSY; 545 546 mutex_lock(&data->mutex); 547 ret = bma180_get_data_reg(data, chan->scan_index); 548 mutex_unlock(&data->mutex); 549 iio_device_release_direct(indio_dev); 550 if (ret < 0) 551 return ret; 552 if (chan->scan_type.sign == 's') { 553 *val = sign_extend32(ret >> chan->scan_type.shift, 554 chan->scan_type.realbits - 1); 555 } else { 556 *val = ret; 557 } 558 return IIO_VAL_INT; 559 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: 560 *val = data->bw; 561 return IIO_VAL_INT; 562 case IIO_CHAN_INFO_SCALE: 563 switch (chan->type) { 564 case IIO_ACCEL: 565 *val = 0; 566 *val2 = data->scale; 567 return IIO_VAL_INT_PLUS_MICRO; 568 case IIO_TEMP: 569 *val = 500; 570 return IIO_VAL_INT; 571 default: 572 return -EINVAL; 573 } 574 case IIO_CHAN_INFO_OFFSET: 575 *val = data->part_info->temp_offset; 576 return IIO_VAL_INT; 577 default: 578 return -EINVAL; 579 } 580 } 581 582 static int bma180_write_raw(struct iio_dev *indio_dev, 583 struct iio_chan_spec const *chan, int val, int val2, long mask) 584 { 585 struct bma180_data *data = iio_priv(indio_dev); 586 int ret; 587 588 switch (mask) { 589 case IIO_CHAN_INFO_SCALE: 590 if (val) 591 return -EINVAL; 592 mutex_lock(&data->mutex); 593 ret = bma180_set_scale(data, val2); 594 mutex_unlock(&data->mutex); 595 return ret; 596 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: 597 if (val2) 598 return -EINVAL; 599 mutex_lock(&data->mutex); 600 ret = bma180_set_bw(data, val); 601 mutex_unlock(&data->mutex); 602 return ret; 603 default: 604 return -EINVAL; 605 } 606 } 607 608 static const struct iio_info bma180_info = { 609 .attrs = &bma180_attrs_group, 610 .read_raw = bma180_read_raw, 611 .write_raw = bma180_write_raw, 612 }; 613 614 static const char * const bma180_power_modes[] = { "low_noise", "low_power" }; 615 616 static int bma180_get_power_mode(struct iio_dev *indio_dev, 617 const struct iio_chan_spec *chan) 618 { 619 struct bma180_data *data = iio_priv(indio_dev); 620 621 return data->pmode; 622 } 623 624 static int bma180_set_power_mode(struct iio_dev *indio_dev, 625 const struct iio_chan_spec *chan, unsigned int mode) 626 { 627 struct bma180_data *data = iio_priv(indio_dev); 628 int ret; 629 630 mutex_lock(&data->mutex); 631 ret = bma180_set_pmode(data, mode); 632 mutex_unlock(&data->mutex); 633 634 return ret; 635 } 636 637 static const struct iio_mount_matrix * 638 bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev, 639 const struct iio_chan_spec *chan) 640 { 641 struct bma180_data *data = iio_priv(indio_dev); 642 643 return &data->orientation; 644 } 645 646 static const struct iio_enum bma180_power_mode_enum = { 647 .items = bma180_power_modes, 648 .num_items = ARRAY_SIZE(bma180_power_modes), 649 .get = bma180_get_power_mode, 650 .set = bma180_set_power_mode, 651 }; 652 653 static const struct iio_chan_spec_ext_info bma023_ext_info[] = { 654 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix), 655 { } 656 }; 657 658 static const struct iio_chan_spec_ext_info bma180_ext_info[] = { 659 IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum), 660 IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum), 661 IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix), 662 { } 663 }; 664 665 #define BMA023_ACC_CHANNEL(_axis, _bits) { \ 666 .type = IIO_ACCEL, \ 667 .modified = 1, \ 668 .channel2 = IIO_MOD_##_axis, \ 669 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 670 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ 671 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ 672 .scan_index = AXIS_##_axis, \ 673 .scan_type = { \ 674 .sign = 's', \ 675 .realbits = _bits, \ 676 .storagebits = 16, \ 677 .shift = 16 - _bits, \ 678 }, \ 679 .ext_info = bma023_ext_info, \ 680 } 681 682 #define BMA150_TEMP_CHANNEL { \ 683 .type = IIO_TEMP, \ 684 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 685 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \ 686 .scan_index = TEMP, \ 687 .scan_type = { \ 688 .sign = 'u', \ 689 .realbits = 8, \ 690 .storagebits = 16, \ 691 }, \ 692 } 693 694 #define BMA180_ACC_CHANNEL(_axis, _bits) { \ 695 .type = IIO_ACCEL, \ 696 .modified = 1, \ 697 .channel2 = IIO_MOD_##_axis, \ 698 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 699 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ 700 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ 701 .scan_index = AXIS_##_axis, \ 702 .scan_type = { \ 703 .sign = 's', \ 704 .realbits = _bits, \ 705 .storagebits = 16, \ 706 .shift = 16 - _bits, \ 707 }, \ 708 .ext_info = bma180_ext_info, \ 709 } 710 711 #define BMA180_TEMP_CHANNEL { \ 712 .type = IIO_TEMP, \ 713 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 714 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \ 715 .scan_index = TEMP, \ 716 .scan_type = { \ 717 .sign = 's', \ 718 .realbits = 8, \ 719 .storagebits = 16, \ 720 }, \ 721 } 722 723 static const struct iio_chan_spec bma023_channels[] = { 724 BMA023_ACC_CHANNEL(X, 10), 725 BMA023_ACC_CHANNEL(Y, 10), 726 BMA023_ACC_CHANNEL(Z, 10), 727 IIO_CHAN_SOFT_TIMESTAMP(4), 728 }; 729 730 static const struct iio_chan_spec bma150_channels[] = { 731 BMA023_ACC_CHANNEL(X, 10), 732 BMA023_ACC_CHANNEL(Y, 10), 733 BMA023_ACC_CHANNEL(Z, 10), 734 BMA150_TEMP_CHANNEL, 735 IIO_CHAN_SOFT_TIMESTAMP(4), 736 }; 737 738 static const struct iio_chan_spec bma180_channels[] = { 739 BMA180_ACC_CHANNEL(X, 14), 740 BMA180_ACC_CHANNEL(Y, 14), 741 BMA180_ACC_CHANNEL(Z, 14), 742 BMA180_TEMP_CHANNEL, 743 IIO_CHAN_SOFT_TIMESTAMP(4), 744 }; 745 746 static const struct iio_chan_spec bma250_channels[] = { 747 BMA180_ACC_CHANNEL(X, 10), 748 BMA180_ACC_CHANNEL(Y, 10), 749 BMA180_ACC_CHANNEL(Z, 10), 750 BMA180_TEMP_CHANNEL, 751 IIO_CHAN_SOFT_TIMESTAMP(4), 752 }; 753 754 static const struct bma180_part_info bma180_part_info[] = { 755 [BMA023] = { 756 .chip_id = BMA023_ID_REG_VAL, 757 .channels = bma023_channels, 758 .num_channels = ARRAY_SIZE(bma023_channels), 759 .scale_table = bma023_scale_table, 760 .num_scales = ARRAY_SIZE(bma023_scale_table), 761 .bw_table = bma023_bw_table, 762 .num_bw = ARRAY_SIZE(bma023_bw_table), 763 /* No temperature channel */ 764 .temp_offset = 0, 765 .int_reset_reg = BMA023_CTRL_REG0, 766 .int_reset_mask = BMA023_INT_RESET_MASK, 767 .sleep_reg = BMA023_CTRL_REG0, 768 .sleep_mask = BMA023_SLEEP, 769 .bw_reg = BMA023_CTRL_REG2, 770 .bw_mask = BMA023_BW_MASK, 771 .scale_reg = BMA023_CTRL_REG2, 772 .scale_mask = BMA023_RANGE_MASK, 773 /* No power mode on bma023 */ 774 .power_reg = 0, 775 .power_mask = 0, 776 .lowpower_val = 0, 777 .int_enable_reg = BMA023_CTRL_REG3, 778 .int_enable_mask = BMA023_NEW_DATA_INT, 779 .softreset_reg = BMA023_CTRL_REG0, 780 .softreset_val = BMA023_RESET_VAL, 781 .chip_config = bma023_chip_config, 782 .chip_disable = bma023_chip_disable, 783 }, 784 [BMA150] = { 785 .chip_id = BMA023_ID_REG_VAL, 786 .channels = bma150_channels, 787 .num_channels = ARRAY_SIZE(bma150_channels), 788 .scale_table = bma023_scale_table, 789 .num_scales = ARRAY_SIZE(bma023_scale_table), 790 .bw_table = bma023_bw_table, 791 .num_bw = ARRAY_SIZE(bma023_bw_table), 792 .temp_offset = -60, /* 0 LSB @ -30 degree C */ 793 .int_reset_reg = BMA023_CTRL_REG0, 794 .int_reset_mask = BMA023_INT_RESET_MASK, 795 .sleep_reg = BMA023_CTRL_REG0, 796 .sleep_mask = BMA023_SLEEP, 797 .bw_reg = BMA023_CTRL_REG2, 798 .bw_mask = BMA023_BW_MASK, 799 .scale_reg = BMA023_CTRL_REG2, 800 .scale_mask = BMA023_RANGE_MASK, 801 /* No power mode on bma150 */ 802 .power_reg = 0, 803 .power_mask = 0, 804 .lowpower_val = 0, 805 .int_enable_reg = BMA023_CTRL_REG3, 806 .int_enable_mask = BMA023_NEW_DATA_INT, 807 .softreset_reg = BMA023_CTRL_REG0, 808 .softreset_val = BMA023_RESET_VAL, 809 .chip_config = bma023_chip_config, 810 .chip_disable = bma023_chip_disable, 811 }, 812 [BMA180] = { 813 .chip_id = BMA180_ID_REG_VAL, 814 .channels = bma180_channels, 815 .num_channels = ARRAY_SIZE(bma180_channels), 816 .scale_table = bma180_scale_table, 817 .num_scales = ARRAY_SIZE(bma180_scale_table), 818 .bw_table = bma180_bw_table, 819 .num_bw = ARRAY_SIZE(bma180_bw_table), 820 .temp_offset = 48, /* 0 LSB @ 24 degree C */ 821 .int_reset_reg = BMA180_CTRL_REG0, 822 .int_reset_mask = BMA180_RESET_INT, 823 .sleep_reg = BMA180_CTRL_REG0, 824 .sleep_mask = BMA180_SLEEP, 825 .bw_reg = BMA180_BW_TCS, 826 .bw_mask = BMA180_BW, 827 .scale_reg = BMA180_OFFSET_LSB1, 828 .scale_mask = BMA180_RANGE, 829 .power_reg = BMA180_TCO_Z, 830 .power_mask = BMA180_MODE_CONFIG, 831 .lowpower_val = BMA180_LOW_POWER, 832 .int_enable_reg = BMA180_CTRL_REG3, 833 .int_enable_mask = BMA180_NEW_DATA_INT, 834 .softreset_reg = BMA180_RESET, 835 .softreset_val = BMA180_RESET_VAL, 836 .chip_config = bma180_chip_config, 837 .chip_disable = bma180_chip_disable, 838 }, 839 [BMA250] = { 840 .chip_id = BMA250_ID_REG_VAL, 841 .channels = bma250_channels, 842 .num_channels = ARRAY_SIZE(bma250_channels), 843 .scale_table = bma250_scale_table, 844 .num_scales = ARRAY_SIZE(bma250_scale_table), 845 .bw_table = bma250_bw_table, 846 .num_bw = ARRAY_SIZE(bma250_bw_table), 847 .temp_offset = 48, /* 0 LSB @ 24 degree C */ 848 .int_reset_reg = BMA250_INT_RESET_REG, 849 .int_reset_mask = BMA250_INT_RESET_MASK, 850 .sleep_reg = BMA250_POWER_REG, 851 .sleep_mask = BMA250_SUSPEND_MASK, 852 .bw_reg = BMA250_BW_REG, 853 .bw_mask = BMA250_BW_MASK, 854 .bw_offset = BMA250_BW_OFFSET, 855 .scale_reg = BMA250_RANGE_REG, 856 .scale_mask = BMA250_RANGE_MASK, 857 .power_reg = BMA250_POWER_REG, 858 .power_mask = BMA250_LOWPOWER_MASK, 859 .lowpower_val = 1, 860 .int_enable_reg = BMA250_INT_ENABLE_REG, 861 .int_enable_mask = BMA250_DATA_INTEN_MASK, 862 .softreset_reg = BMA250_RESET_REG, 863 .softreset_val = BMA180_RESET_VAL, 864 .chip_config = bma250_chip_config, 865 .chip_disable = bma250_chip_disable, 866 }, 867 }; 868 869 static irqreturn_t bma180_trigger_handler(int irq, void *p) 870 { 871 struct iio_poll_func *pf = p; 872 struct iio_dev *indio_dev = pf->indio_dev; 873 struct bma180_data *data = iio_priv(indio_dev); 874 s64 time_ns = iio_get_time_ns(indio_dev); 875 int bit, ret, i = 0; 876 877 mutex_lock(&data->mutex); 878 879 iio_for_each_active_channel(indio_dev, bit) { 880 ret = bma180_get_data_reg(data, bit); 881 if (ret < 0) { 882 mutex_unlock(&data->mutex); 883 goto err; 884 } 885 data->scan.chan[i++] = ret; 886 } 887 888 mutex_unlock(&data->mutex); 889 890 iio_push_to_buffers_with_ts(indio_dev, &data->scan, sizeof(data->scan), time_ns); 891 err: 892 iio_trigger_notify_done(indio_dev->trig); 893 894 return IRQ_HANDLED; 895 } 896 897 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig, 898 bool state) 899 { 900 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 901 struct bma180_data *data = iio_priv(indio_dev); 902 903 return bma180_set_new_data_intr_state(data, state); 904 } 905 906 static void bma180_trig_reen(struct iio_trigger *trig) 907 { 908 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 909 struct bma180_data *data = iio_priv(indio_dev); 910 int ret; 911 912 ret = bma180_reset_intr(data); 913 if (ret) 914 dev_err(&data->client->dev, "failed to reset interrupt\n"); 915 } 916 917 static const struct iio_trigger_ops bma180_trigger_ops = { 918 .set_trigger_state = bma180_data_rdy_trigger_set_state, 919 .reenable = bma180_trig_reen, 920 }; 921 922 static int bma180_probe(struct i2c_client *client) 923 { 924 const struct i2c_device_id *id = i2c_client_get_device_id(client); 925 struct device *dev = &client->dev; 926 struct bma180_data *data; 927 struct iio_dev *indio_dev; 928 int ret; 929 930 indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); 931 if (!indio_dev) 932 return -ENOMEM; 933 934 data = iio_priv(indio_dev); 935 i2c_set_clientdata(client, indio_dev); 936 data->client = client; 937 data->part_info = i2c_get_match_data(client); 938 939 ret = iio_read_mount_matrix(dev, &data->orientation); 940 if (ret) 941 return ret; 942 943 data->vdd_supply = devm_regulator_get(dev, "vdd"); 944 if (IS_ERR(data->vdd_supply)) 945 return dev_err_probe(dev, PTR_ERR(data->vdd_supply), 946 "Failed to get vdd regulator\n"); 947 948 data->vddio_supply = devm_regulator_get(dev, "vddio"); 949 if (IS_ERR(data->vddio_supply)) 950 return dev_err_probe(dev, PTR_ERR(data->vddio_supply), 951 "Failed to get vddio regulator\n"); 952 953 /* Typical voltage 2.4V these are min and max */ 954 ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000); 955 if (ret) 956 return ret; 957 ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000); 958 if (ret) 959 return ret; 960 ret = regulator_enable(data->vdd_supply); 961 if (ret) { 962 dev_err(dev, "Failed to enable vdd regulator: %d\n", ret); 963 return ret; 964 } 965 ret = regulator_enable(data->vddio_supply); 966 if (ret) { 967 dev_err(dev, "Failed to enable vddio regulator: %d\n", ret); 968 goto err_disable_vdd; 969 } 970 /* Wait to make sure we started up properly (3 ms at least) */ 971 usleep_range(3000, 5000); 972 973 ret = data->part_info->chip_config(data); 974 if (ret < 0) 975 goto err_chip_disable; 976 977 mutex_init(&data->mutex); 978 indio_dev->channels = data->part_info->channels; 979 indio_dev->num_channels = data->part_info->num_channels; 980 indio_dev->name = id->name; 981 indio_dev->modes = INDIO_DIRECT_MODE; 982 indio_dev->info = &bma180_info; 983 984 if (client->irq > 0) { 985 data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, 986 iio_device_id(indio_dev)); 987 if (!data->trig) { 988 ret = -ENOMEM; 989 goto err_chip_disable; 990 } 991 992 ret = devm_request_irq(dev, client->irq, 993 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING, 994 "bma180_event", data->trig); 995 if (ret) { 996 dev_err(dev, "unable to request IRQ\n"); 997 goto err_trigger_free; 998 } 999 1000 data->trig->ops = &bma180_trigger_ops; 1001 iio_trigger_set_drvdata(data->trig, indio_dev); 1002 1003 ret = iio_trigger_register(data->trig); 1004 if (ret) 1005 goto err_trigger_free; 1006 1007 indio_dev->trig = iio_trigger_get(data->trig); 1008 } 1009 1010 ret = iio_triggered_buffer_setup(indio_dev, NULL, 1011 bma180_trigger_handler, NULL); 1012 if (ret < 0) { 1013 dev_err(dev, "unable to setup iio triggered buffer\n"); 1014 goto err_trigger_unregister; 1015 } 1016 1017 ret = iio_device_register(indio_dev); 1018 if (ret < 0) { 1019 dev_err(dev, "unable to register iio device\n"); 1020 goto err_buffer_cleanup; 1021 } 1022 1023 return 0; 1024 1025 err_buffer_cleanup: 1026 iio_triggered_buffer_cleanup(indio_dev); 1027 err_trigger_unregister: 1028 if (data->trig) 1029 iio_trigger_unregister(data->trig); 1030 err_trigger_free: 1031 iio_trigger_free(data->trig); 1032 err_chip_disable: 1033 data->part_info->chip_disable(data); 1034 regulator_disable(data->vddio_supply); 1035 err_disable_vdd: 1036 regulator_disable(data->vdd_supply); 1037 1038 return ret; 1039 } 1040 1041 static void bma180_remove(struct i2c_client *client) 1042 { 1043 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1044 struct bma180_data *data = iio_priv(indio_dev); 1045 1046 iio_device_unregister(indio_dev); 1047 iio_triggered_buffer_cleanup(indio_dev); 1048 if (data->trig) { 1049 iio_trigger_unregister(data->trig); 1050 iio_trigger_free(data->trig); 1051 } 1052 1053 mutex_lock(&data->mutex); 1054 data->part_info->chip_disable(data); 1055 mutex_unlock(&data->mutex); 1056 regulator_disable(data->vddio_supply); 1057 regulator_disable(data->vdd_supply); 1058 } 1059 1060 static int bma180_suspend(struct device *dev) 1061 { 1062 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1063 struct bma180_data *data = iio_priv(indio_dev); 1064 int ret; 1065 1066 mutex_lock(&data->mutex); 1067 ret = bma180_set_sleep_state(data, true); 1068 mutex_unlock(&data->mutex); 1069 1070 return ret; 1071 } 1072 1073 static int bma180_resume(struct device *dev) 1074 { 1075 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1076 struct bma180_data *data = iio_priv(indio_dev); 1077 int ret; 1078 1079 mutex_lock(&data->mutex); 1080 ret = bma180_set_sleep_state(data, false); 1081 mutex_unlock(&data->mutex); 1082 1083 return ret; 1084 } 1085 1086 static DEFINE_SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume); 1087 1088 static const struct i2c_device_id bma180_ids[] = { 1089 { "bma023", (kernel_ulong_t)&bma180_part_info[BMA023] }, 1090 { "bma150", (kernel_ulong_t)&bma180_part_info[BMA150] }, 1091 { "bma180", (kernel_ulong_t)&bma180_part_info[BMA180] }, 1092 { "bma250", (kernel_ulong_t)&bma180_part_info[BMA250] }, 1093 { "smb380", (kernel_ulong_t)&bma180_part_info[BMA150] }, 1094 { } 1095 }; 1096 1097 MODULE_DEVICE_TABLE(i2c, bma180_ids); 1098 1099 static const struct of_device_id bma180_of_match[] = { 1100 { 1101 .compatible = "bosch,bma023", 1102 .data = &bma180_part_info[BMA023] 1103 }, 1104 { 1105 .compatible = "bosch,bma150", 1106 .data = &bma180_part_info[BMA150] 1107 }, 1108 { 1109 .compatible = "bosch,bma180", 1110 .data = &bma180_part_info[BMA180] 1111 }, 1112 { 1113 .compatible = "bosch,bma250", 1114 .data = &bma180_part_info[BMA250] 1115 }, 1116 { 1117 .compatible = "bosch,smb380", 1118 .data = &bma180_part_info[BMA150] 1119 }, 1120 { } 1121 }; 1122 MODULE_DEVICE_TABLE(of, bma180_of_match); 1123 1124 static struct i2c_driver bma180_driver = { 1125 .driver = { 1126 .name = "bma180", 1127 .pm = pm_sleep_ptr(&bma180_pm_ops), 1128 .of_match_table = bma180_of_match, 1129 }, 1130 .probe = bma180_probe, 1131 .remove = bma180_remove, 1132 .id_table = bma180_ids, 1133 }; 1134 1135 module_i2c_driver(bma180_driver); 1136 1137 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>"); 1138 MODULE_AUTHOR("Texas Instruments, Inc."); 1139 MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA250 triaxial acceleration sensor"); 1140 MODULE_LICENSE("GPL"); 1141