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/i2c.h> 17 #include <linux/interrupt.h> 18 #include <linux/delay.h> 19 #include <linux/of.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/iio/iio.h> 25 #include <linux/iio/sysfs.h> 26 #include <linux/iio/buffer.h> 27 #include <linux/iio/trigger.h> 28 #include <linux/iio/trigger_consumer.h> 29 #include <linux/iio/triggered_buffer.h> 30 31 #define BMA180_DRV_NAME "bma180" 32 #define BMA180_IRQ_NAME "bma180_event" 33 34 enum chip_ids { 35 BMA023, 36 BMA150, 37 BMA180, 38 BMA250, 39 }; 40 41 struct bma180_data; 42 43 struct bma180_part_info { 44 u8 chip_id; 45 const struct iio_chan_spec *channels; 46 unsigned int num_channels; 47 const int *scale_table; 48 unsigned int num_scales; 49 const int *bw_table; 50 unsigned int num_bw; 51 int temp_offset; 52 53 u8 int_reset_reg, int_reset_mask; 54 u8 sleep_reg, sleep_mask; 55 u8 bw_reg, bw_mask, bw_offset; 56 u8 scale_reg, scale_mask; 57 u8 power_reg, power_mask, lowpower_val; 58 u8 int_enable_reg, int_enable_mask; 59 u8 softreset_reg, softreset_val; 60 61 int (*chip_config)(struct bma180_data *data); 62 void (*chip_disable)(struct bma180_data *data); 63 }; 64 65 /* Register set */ 66 #define BMA023_CTRL_REG0 0x0a 67 #define BMA023_CTRL_REG1 0x0b 68 #define BMA023_CTRL_REG2 0x14 69 #define BMA023_CTRL_REG3 0x15 70 71 #define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */ 72 #define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */ 73 #define BMA023_SLEEP BIT(0) 74 #define BMA023_INT_RESET_MASK BIT(6) 75 #define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */ 76 #define BMA023_RESET_VAL BIT(1) 77 78 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */ 79 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */ 80 #define BMA180_TEMP 0x08 81 #define BMA180_CTRL_REG0 0x0d 82 #define BMA180_RESET 0x10 83 #define BMA180_BW_TCS 0x20 84 #define BMA180_CTRL_REG3 0x21 85 #define BMA180_TCO_Z 0x30 86 #define BMA180_OFFSET_LSB1 0x35 87 88 /* BMA180_CTRL_REG0 bits */ 89 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */ 90 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */ 91 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */ 92 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */ 93 94 /* BMA180_CTRL_REG3 bits */ 95 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */ 96 97 /* BMA180_OFFSET_LSB1 skipping mode bit */ 98 #define BMA180_SMP_SKIP BIT(0) 99 100 /* Bit masks for registers bit fields */ 101 #define BMA180_RANGE 0x0e /* Range of measured accel values */ 102 #define BMA180_BW 0xf0 /* Accel bandwidth */ 103 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */ 104 105 /* We have to write this value in reset register to do soft reset */ 106 #define BMA180_RESET_VAL 0xb6 107 108 #define BMA023_ID_REG_VAL 0x02 109 #define BMA180_ID_REG_VAL 0x03 110 #define BMA250_ID_REG_VAL 0x03 111 112 /* Chip power modes */ 113 #define BMA180_LOW_POWER 0x03 114 115 #define BMA250_RANGE_REG 0x0f 116 #define BMA250_BW_REG 0x10 117 #define BMA250_POWER_REG 0x11 118 #define BMA250_RESET_REG 0x14 119 #define BMA250_INT_ENABLE_REG 0x17 120 #define BMA250_INT_MAP_REG 0x1a 121 #define BMA250_INT_RESET_REG 0x21 122 123 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */ 124 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */ 125 #define BMA250_BW_OFFSET 8 126 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */ 127 #define BMA250_LOWPOWER_MASK BIT(6) 128 #define BMA250_DATA_INTEN_MASK BIT(4) 129 #define BMA250_INT1_DATA_MASK BIT(0) 130 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */ 131 132 struct bma180_data { 133 struct regulator *vdd_supply; 134 struct regulator *vddio_supply; 135 struct i2c_client *client; 136 struct iio_trigger *trig; 137 const struct bma180_part_info *part_info; 138 struct iio_mount_matrix orientation; 139 struct mutex mutex; 140 bool sleep_state; 141 int scale; 142 int bw; 143 bool pmode; 144 /* Ensure timestamp is naturally aligned */ 145 struct { 146 s16 chan[4]; 147 s64 timestamp __aligned(8); 148 } scan; 149 }; 150 151 enum bma180_chan { 152 AXIS_X, 153 AXIS_Y, 154 AXIS_Z, 155 TEMP 156 }; 157 158 static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */ 159 static int bma023_scale_table[] = { 2452, 4903, 9709, }; 160 161 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */ 162 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 }; 163 164 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250, 500, 1000 }; /* Hz */ 165 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0, 166 0, 0, 306458 }; 167 168 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan) 169 { 170 int ret; 171 172 if (data->sleep_state) 173 return -EBUSY; 174 175 switch (chan) { 176 case TEMP: 177 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP); 178 if (ret < 0) 179 dev_err(&data->client->dev, "failed to read temp register\n"); 180 break; 181 default: 182 ret = i2c_smbus_read_word_data(data->client, 183 BMA180_ACC_X_LSB + chan * 2); 184 if (ret < 0) 185 dev_err(&data->client->dev, 186 "failed to read accel_%c register\n", 187 'x' + chan); 188 } 189 190 return ret; 191 } 192 193 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val) 194 { 195 int ret = i2c_smbus_read_byte_data(data->client, reg); 196 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1)); 197 198 if (ret < 0) 199 return ret; 200 201 return i2c_smbus_write_byte_data(data->client, reg, reg_val); 202 } 203 204 static int bma180_reset_intr(struct bma180_data *data) 205 { 206 int ret = bma180_set_bits(data, data->part_info->int_reset_reg, 207 data->part_info->int_reset_mask, 1); 208 209 if (ret) 210 dev_err(&data->client->dev, "failed to reset interrupt\n"); 211 212 return ret; 213 } 214 215 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state) 216 { 217 int ret = bma180_set_bits(data, data->part_info->int_enable_reg, 218 data->part_info->int_enable_mask, state); 219 if (ret) 220 goto err; 221 ret = bma180_reset_intr(data); 222 if (ret) 223 goto err; 224 225 return 0; 226 227 err: 228 dev_err(&data->client->dev, 229 "failed to set new data interrupt state %d\n", state); 230 return ret; 231 } 232 233 static int bma180_set_sleep_state(struct bma180_data *data, bool state) 234 { 235 int ret = bma180_set_bits(data, data->part_info->sleep_reg, 236 data->part_info->sleep_mask, state); 237 238 if (ret) { 239 dev_err(&data->client->dev, 240 "failed to set sleep state %d\n", state); 241 return ret; 242 } 243 data->sleep_state = state; 244 245 return 0; 246 } 247 248 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state) 249 { 250 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state); 251 252 if (ret) 253 dev_err(&data->client->dev, 254 "failed to set ee writing state %d\n", state); 255 256 return ret; 257 } 258 259 static int bma180_set_bw(struct bma180_data *data, int val) 260 { 261 int ret, i; 262 263 if (data->sleep_state) 264 return -EBUSY; 265 266 for (i = 0; i < data->part_info->num_bw; ++i) { 267 if (data->part_info->bw_table[i] == val) { 268 ret = bma180_set_bits(data, data->part_info->bw_reg, 269 data->part_info->bw_mask, 270 i + data->part_info->bw_offset); 271 if (ret) { 272 dev_err(&data->client->dev, 273 "failed to set bandwidth\n"); 274 return ret; 275 } 276 data->bw = val; 277 return 0; 278 } 279 } 280 281 return -EINVAL; 282 } 283 284 static int bma180_set_scale(struct bma180_data *data, int val) 285 { 286 int ret, i; 287 288 if (data->sleep_state) 289 return -EBUSY; 290 291 for (i = 0; i < data->part_info->num_scales; ++i) 292 if (data->part_info->scale_table[i] == val) { 293 ret = bma180_set_bits(data, data->part_info->scale_reg, 294 data->part_info->scale_mask, i); 295 if (ret) { 296 dev_err(&data->client->dev, 297 "failed to set scale\n"); 298 return ret; 299 } 300 data->scale = val; 301 return 0; 302 } 303 304 return -EINVAL; 305 } 306 307 static int bma180_set_pmode(struct bma180_data *data, bool mode) 308 { 309 u8 reg_val = mode ? data->part_info->lowpower_val : 0; 310 int ret = bma180_set_bits(data, data->part_info->power_reg, 311 data->part_info->power_mask, reg_val); 312 313 if (ret) { 314 dev_err(&data->client->dev, "failed to set power mode\n"); 315 return ret; 316 } 317 data->pmode = mode; 318 319 return 0; 320 } 321 322 static int bma180_soft_reset(struct bma180_data *data) 323 { 324 int ret = i2c_smbus_write_byte_data(data->client, 325 data->part_info->softreset_reg, 326 data->part_info->softreset_val); 327 328 if (ret) 329 dev_err(&data->client->dev, "failed to reset the chip\n"); 330 331 return ret; 332 } 333 334 static int bma180_chip_init(struct bma180_data *data) 335 { 336 /* Try to read chip_id register. It must return 0x03. */ 337 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID); 338 339 if (ret < 0) 340 return ret; 341 if (ret != data->part_info->chip_id) { 342 dev_err(&data->client->dev, "wrong chip ID %d expected %d\n", 343 ret, data->part_info->chip_id); 344 return -ENODEV; 345 } 346 347 ret = bma180_soft_reset(data); 348 if (ret) 349 return ret; 350 /* 351 * No serial transaction should occur within minimum 10 us 352 * after soft_reset command 353 */ 354 msleep(20); 355 356 return bma180_set_new_data_intr_state(data, false); 357 } 358 359 static int bma023_chip_config(struct bma180_data *data) 360 { 361 int ret = bma180_chip_init(data); 362 363 if (ret) 364 goto err; 365 366 ret = bma180_set_bw(data, 50); /* 50 Hz */ 367 if (ret) 368 goto err; 369 ret = bma180_set_scale(data, 2452); /* 2 G */ 370 if (ret) 371 goto err; 372 373 return 0; 374 375 err: 376 dev_err(&data->client->dev, "failed to config the chip\n"); 377 return ret; 378 } 379 380 static int bma180_chip_config(struct bma180_data *data) 381 { 382 int ret = bma180_chip_init(data); 383 384 if (ret) 385 goto err; 386 ret = bma180_set_pmode(data, false); 387 if (ret) 388 goto err; 389 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1); 390 if (ret) 391 goto err; 392 ret = bma180_set_ee_writing_state(data, true); 393 if (ret) 394 goto err; 395 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1); 396 if (ret) 397 goto err; 398 ret = bma180_set_bw(data, 20); /* 20 Hz */ 399 if (ret) 400 goto err; 401 ret = bma180_set_scale(data, 2452); /* 2 G */ 402 if (ret) 403 goto err; 404 405 return 0; 406 407 err: 408 dev_err(&data->client->dev, "failed to config the chip\n"); 409 return ret; 410 } 411 412 static int bma250_chip_config(struct bma180_data *data) 413 { 414 int ret = bma180_chip_init(data); 415 416 if (ret) 417 goto err; 418 ret = bma180_set_pmode(data, false); 419 if (ret) 420 goto err; 421 ret = bma180_set_bw(data, 16); /* 16 Hz */ 422 if (ret) 423 goto err; 424 ret = bma180_set_scale(data, 38344); /* 2 G */ 425 if (ret) 426 goto err; 427 /* 428 * This enables dataready interrupt on the INT1 pin 429 * FIXME: support using the INT2 pin 430 */ 431 ret = bma180_set_bits(data, BMA250_INT_MAP_REG, BMA250_INT1_DATA_MASK, 1); 432 if (ret) 433 goto err; 434 435 return 0; 436 437 err: 438 dev_err(&data->client->dev, "failed to config the chip\n"); 439 return ret; 440 } 441 442 static void bma023_chip_disable(struct bma180_data *data) 443 { 444 if (bma180_set_sleep_state(data, true)) 445 goto err; 446 447 return; 448 449 err: 450 dev_err(&data->client->dev, "failed to disable the chip\n"); 451 } 452 453 static void bma180_chip_disable(struct bma180_data *data) 454 { 455 if (bma180_set_new_data_intr_state(data, false)) 456 goto err; 457 if (bma180_set_ee_writing_state(data, false)) 458 goto err; 459 if (bma180_set_sleep_state(data, true)) 460 goto err; 461 462 return; 463 464 err: 465 dev_err(&data->client->dev, "failed to disable the chip\n"); 466 } 467 468 static void bma250_chip_disable(struct bma180_data *data) 469 { 470 if (bma180_set_new_data_intr_state(data, false)) 471 goto err; 472 if (bma180_set_sleep_state(data, true)) 473 goto err; 474 475 return; 476 477 err: 478 dev_err(&data->client->dev, "failed to disable the chip\n"); 479 } 480 481 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n, 482 bool micros) 483 { 484 size_t len = 0; 485 int i; 486 487 for (i = 0; i < n; i++) { 488 if (!vals[i]) 489 continue; 490 len += scnprintf(buf + len, PAGE_SIZE - len, 491 micros ? "0.%06d " : "%d ", vals[i]); 492 } 493 buf[len - 1] = '\n'; 494 495 return len; 496 } 497 498 static ssize_t bma180_show_filter_freq_avail(struct device *dev, 499 struct device_attribute *attr, char *buf) 500 { 501 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); 502 503 return bma180_show_avail(buf, data->part_info->bw_table, 504 data->part_info->num_bw, false); 505 } 506 507 static ssize_t bma180_show_scale_avail(struct device *dev, 508 struct device_attribute *attr, char *buf) 509 { 510 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); 511 512 return bma180_show_avail(buf, data->part_info->scale_table, 513 data->part_info->num_scales, true); 514 } 515 516 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, 517 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0); 518 519 static IIO_DEVICE_ATTR(in_accel_scale_available, 520 S_IRUGO, bma180_show_scale_avail, NULL, 0); 521 522 static struct attribute *bma180_attributes[] = { 523 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available. 524 dev_attr.attr, 525 &iio_dev_attr_in_accel_scale_available.dev_attr.attr, 526 NULL, 527 }; 528 529 static const struct attribute_group bma180_attrs_group = { 530 .attrs = bma180_attributes, 531 }; 532 533 static int bma180_read_raw(struct iio_dev *indio_dev, 534 struct iio_chan_spec const *chan, int *val, int *val2, 535 long mask) 536 { 537 struct bma180_data *data = iio_priv(indio_dev); 538 int ret; 539 540 switch (mask) { 541 case IIO_CHAN_INFO_RAW: 542 ret = iio_device_claim_direct_mode(indio_dev); 543 if (ret) 544 return ret; 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_mode(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 for_each_set_bit(bit, indio_dev->active_scan_mask, 880 indio_dev->masklength) { 881 ret = bma180_get_data_reg(data, bit); 882 if (ret < 0) { 883 mutex_unlock(&data->mutex); 884 goto err; 885 } 886 data->scan.chan[i++] = ret; 887 } 888 889 mutex_unlock(&data->mutex); 890 891 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns); 892 err: 893 iio_trigger_notify_done(indio_dev->trig); 894 895 return IRQ_HANDLED; 896 } 897 898 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig, 899 bool state) 900 { 901 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 902 struct bma180_data *data = iio_priv(indio_dev); 903 904 return bma180_set_new_data_intr_state(data, state); 905 } 906 907 static void bma180_trig_reen(struct iio_trigger *trig) 908 { 909 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 910 struct bma180_data *data = iio_priv(indio_dev); 911 int ret; 912 913 ret = bma180_reset_intr(data); 914 if (ret) 915 dev_err(&data->client->dev, "failed to reset interrupt\n"); 916 } 917 918 static const struct iio_trigger_ops bma180_trigger_ops = { 919 .set_trigger_state = bma180_data_rdy_trigger_set_state, 920 .reenable = bma180_trig_reen, 921 }; 922 923 static int bma180_probe(struct i2c_client *client) 924 { 925 const struct i2c_device_id *id = i2c_client_get_device_id(client); 926 struct device *dev = &client->dev; 927 struct bma180_data *data; 928 struct iio_dev *indio_dev; 929 int ret; 930 931 indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); 932 if (!indio_dev) 933 return -ENOMEM; 934 935 data = iio_priv(indio_dev); 936 i2c_set_clientdata(client, indio_dev); 937 data->client = client; 938 data->part_info = i2c_get_match_data(client); 939 940 ret = iio_read_mount_matrix(dev, &data->orientation); 941 if (ret) 942 return ret; 943 944 data->vdd_supply = devm_regulator_get(dev, "vdd"); 945 if (IS_ERR(data->vdd_supply)) 946 return dev_err_probe(dev, PTR_ERR(data->vdd_supply), 947 "Failed to get vdd regulator\n"); 948 949 data->vddio_supply = devm_regulator_get(dev, "vddio"); 950 if (IS_ERR(data->vddio_supply)) 951 return dev_err_probe(dev, PTR_ERR(data->vddio_supply), 952 "Failed to get vddio regulator\n"); 953 954 /* Typical voltage 2.4V these are min and max */ 955 ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000); 956 if (ret) 957 return ret; 958 ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000); 959 if (ret) 960 return ret; 961 ret = regulator_enable(data->vdd_supply); 962 if (ret) { 963 dev_err(dev, "Failed to enable vdd regulator: %d\n", ret); 964 return ret; 965 } 966 ret = regulator_enable(data->vddio_supply); 967 if (ret) { 968 dev_err(dev, "Failed to enable vddio regulator: %d\n", ret); 969 goto err_disable_vdd; 970 } 971 /* Wait to make sure we started up properly (3 ms at least) */ 972 usleep_range(3000, 5000); 973 974 ret = data->part_info->chip_config(data); 975 if (ret < 0) 976 goto err_chip_disable; 977 978 mutex_init(&data->mutex); 979 indio_dev->channels = data->part_info->channels; 980 indio_dev->num_channels = data->part_info->num_channels; 981 indio_dev->name = id->name; 982 indio_dev->modes = INDIO_DIRECT_MODE; 983 indio_dev->info = &bma180_info; 984 985 if (client->irq > 0) { 986 data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, 987 iio_device_id(indio_dev)); 988 if (!data->trig) { 989 ret = -ENOMEM; 990 goto err_chip_disable; 991 } 992 993 ret = devm_request_irq(dev, client->irq, 994 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING, 995 "bma180_event", data->trig); 996 if (ret) { 997 dev_err(dev, "unable to request IRQ\n"); 998 goto err_trigger_free; 999 } 1000 1001 data->trig->ops = &bma180_trigger_ops; 1002 iio_trigger_set_drvdata(data->trig, indio_dev); 1003 1004 ret = iio_trigger_register(data->trig); 1005 if (ret) 1006 goto err_trigger_free; 1007 1008 indio_dev->trig = iio_trigger_get(data->trig); 1009 } 1010 1011 ret = iio_triggered_buffer_setup(indio_dev, NULL, 1012 bma180_trigger_handler, NULL); 1013 if (ret < 0) { 1014 dev_err(dev, "unable to setup iio triggered buffer\n"); 1015 goto err_trigger_unregister; 1016 } 1017 1018 ret = iio_device_register(indio_dev); 1019 if (ret < 0) { 1020 dev_err(dev, "unable to register iio device\n"); 1021 goto err_buffer_cleanup; 1022 } 1023 1024 return 0; 1025 1026 err_buffer_cleanup: 1027 iio_triggered_buffer_cleanup(indio_dev); 1028 err_trigger_unregister: 1029 if (data->trig) 1030 iio_trigger_unregister(data->trig); 1031 err_trigger_free: 1032 iio_trigger_free(data->trig); 1033 err_chip_disable: 1034 data->part_info->chip_disable(data); 1035 regulator_disable(data->vddio_supply); 1036 err_disable_vdd: 1037 regulator_disable(data->vdd_supply); 1038 1039 return ret; 1040 } 1041 1042 static void bma180_remove(struct i2c_client *client) 1043 { 1044 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1045 struct bma180_data *data = iio_priv(indio_dev); 1046 1047 iio_device_unregister(indio_dev); 1048 iio_triggered_buffer_cleanup(indio_dev); 1049 if (data->trig) { 1050 iio_trigger_unregister(data->trig); 1051 iio_trigger_free(data->trig); 1052 } 1053 1054 mutex_lock(&data->mutex); 1055 data->part_info->chip_disable(data); 1056 mutex_unlock(&data->mutex); 1057 regulator_disable(data->vddio_supply); 1058 regulator_disable(data->vdd_supply); 1059 } 1060 1061 static int bma180_suspend(struct device *dev) 1062 { 1063 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1064 struct bma180_data *data = iio_priv(indio_dev); 1065 int ret; 1066 1067 mutex_lock(&data->mutex); 1068 ret = bma180_set_sleep_state(data, true); 1069 mutex_unlock(&data->mutex); 1070 1071 return ret; 1072 } 1073 1074 static int bma180_resume(struct device *dev) 1075 { 1076 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1077 struct bma180_data *data = iio_priv(indio_dev); 1078 int ret; 1079 1080 mutex_lock(&data->mutex); 1081 ret = bma180_set_sleep_state(data, false); 1082 mutex_unlock(&data->mutex); 1083 1084 return ret; 1085 } 1086 1087 static DEFINE_SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume); 1088 1089 static const struct i2c_device_id bma180_ids[] = { 1090 { "bma023", (kernel_ulong_t)&bma180_part_info[BMA023] }, 1091 { "bma150", (kernel_ulong_t)&bma180_part_info[BMA150] }, 1092 { "bma180", (kernel_ulong_t)&bma180_part_info[BMA180] }, 1093 { "bma250", (kernel_ulong_t)&bma180_part_info[BMA250] }, 1094 { "smb380", (kernel_ulong_t)&bma180_part_info[BMA150] }, 1095 { } 1096 }; 1097 1098 MODULE_DEVICE_TABLE(i2c, bma180_ids); 1099 1100 static const struct of_device_id bma180_of_match[] = { 1101 { 1102 .compatible = "bosch,bma023", 1103 .data = &bma180_part_info[BMA023] 1104 }, 1105 { 1106 .compatible = "bosch,bma150", 1107 .data = &bma180_part_info[BMA150] 1108 }, 1109 { 1110 .compatible = "bosch,bma180", 1111 .data = &bma180_part_info[BMA180] 1112 }, 1113 { 1114 .compatible = "bosch,bma250", 1115 .data = &bma180_part_info[BMA250] 1116 }, 1117 { 1118 .compatible = "bosch,smb380", 1119 .data = &bma180_part_info[BMA150] 1120 }, 1121 { } 1122 }; 1123 MODULE_DEVICE_TABLE(of, bma180_of_match); 1124 1125 static struct i2c_driver bma180_driver = { 1126 .driver = { 1127 .name = "bma180", 1128 .pm = pm_sleep_ptr(&bma180_pm_ops), 1129 .of_match_table = bma180_of_match, 1130 }, 1131 .probe = bma180_probe, 1132 .remove = bma180_remove, 1133 .id_table = bma180_ids, 1134 }; 1135 1136 module_i2c_driver(bma180_driver); 1137 1138 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>"); 1139 MODULE_AUTHOR("Texas Instruments, Inc."); 1140 MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA250 triaxial acceleration sensor"); 1141 MODULE_LICENSE("GPL"); 1142