drivers/iio/accel/bma180.c

   1 /*
   2  * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
   3  *
   4  * Copyright 2013 Oleksandr Kravchenko <[email protected]>
   5  *
   6  * Support for BMA250 (c) Peter Meerwald <[email protected]>
   7  *
   8  * This file is subject to the terms and conditions of version 2 of
   9  * the GNU General Public License.  See the file COPYING in the main
  10  * directory of this archive for more details.
  11  *
  12  * SPI is not supported by driver
  13  * BMA180: 7-bit I2C slave address 0x40 or 0x41
  14  * BMA250: 7-bit I2C slave address 0x18 or 0x19
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/i2c.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/delay.h>
  21 #include <linux/of.h>
  22 #include <linux/bitops.h>
  23 #include <linux/slab.h>
  24 #include <linux/string.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 {
  36         BMA180,
  37         BMA250,
  38 };
  39
  40 struct bma180_data;
  41
  42 struct bma180_part_info {
  43         const struct iio_chan_spec *channels;
  44         unsigned num_channels;
  45         const int *scale_table;
  46         unsigned num_scales;
  47         const int *bw_table;
  48         unsigned num_bw;
  49
  50         u8 int_reset_reg, int_reset_mask;
  51         u8 sleep_reg, sleep_mask;
  52         u8 bw_reg, bw_mask;
  53         u8 scale_reg, scale_mask;
  54         u8 power_reg, power_mask, lowpower_val;
  55         u8 int_enable_reg, int_enable_mask;
  56         u8 softreset_reg;
  57
  58         int (*chip_config)(struct bma180_data *data);
  59         void (*chip_disable)(struct bma180_data *data);
  60 };
  61
  62 /* Register set */
  63 #define BMA180_CHIP_ID          0x00 /* Need to distinguish BMA180 from other */
  64 #define BMA180_ACC_X_LSB        0x02 /* First of 6 registers of accel data */
  65 #define BMA180_TEMP             0x08
  66 #define BMA180_CTRL_REG0        0x0d
  67 #define BMA180_RESET            0x10
  68 #define BMA180_BW_TCS           0x20
  69 #define BMA180_CTRL_REG3        0x21
  70 #define BMA180_TCO_Z            0x30
  71 #define BMA180_OFFSET_LSB1      0x35
  72
  73 /* BMA180_CTRL_REG0 bits */
  74 #define BMA180_DIS_WAKE_UP      BIT(0) /* Disable wake up mode */
  75 #define BMA180_SLEEP            BIT(1) /* 1 - chip will sleep */
  76 #define BMA180_EE_W             BIT(4) /* Unlock writing to addr from 0x20 */
  77 #define BMA180_RESET_INT        BIT(6) /* Reset pending interrupts */
  78
  79 /* BMA180_CTRL_REG3 bits */
  80 #define BMA180_NEW_DATA_INT     BIT(1) /* Intr every new accel data is ready */
  81
  82 /* BMA180_OFFSET_LSB1 skipping mode bit */
  83 #define BMA180_SMP_SKIP         BIT(0)
  84
  85 /* Bit masks for registers bit fields */
  86 #define BMA180_RANGE            0x0e /* Range of measured accel values */
  87 #define BMA180_BW               0xf0 /* Accel bandwidth */
  88 #define BMA180_MODE_CONFIG      0x03 /* Config operation modes */
  89
  90 /* We have to write this value in reset register to do soft reset */
  91 #define BMA180_RESET_VAL        0xb6
  92
  93 #define BMA180_ID_REG_VAL       0x03
  94
  95 /* Chip power modes */
  96 #define BMA180_LOW_POWER        0x03
  97
  98 #define BMA250_RANGE_REG        0x0f
  99 #define BMA250_BW_REG           0x10
 100 #define BMA250_POWER_REG        0x11
 101 #define BMA250_RESET_REG        0x14
 102 #define BMA250_INT_ENABLE_REG   0x17
 103 #define BMA250_INT_MAP_REG      0x1a
 104 #define BMA250_INT_RESET_REG    0x21
 105
 106 #define BMA250_RANGE_MASK       GENMASK(3, 0) /* Range of accel values */
 107 #define BMA250_BW_MASK          GENMASK(4, 0) /* Accel bandwidth */
 108 #define BMA250_SUSPEND_MASK     BIT(7) /* chip will sleep */
 109 #define BMA250_LOWPOWER_MASK    BIT(6)
 110 #define BMA250_DATA_INTEN_MASK  BIT(4)
 111 #define BMA250_INT1_DATA_MASK   BIT(0)
 112 #define BMA250_INT_RESET_MASK   BIT(7) /* Reset pending interrupts */
 113
 114 struct bma180_data {
 115         struct i2c_client *client;
 116         struct iio_trigger *trig;
 117         const struct bma180_part_info *part_info;
 118         struct mutex mutex;
 119         bool sleep_state;
 120         int scale;
 121         int bw;
 122         bool pmode;
 123         u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
 124 };
 125
 126 enum bma180_chan {
 127         AXIS_X,
 128         AXIS_Y,
 129         AXIS_Z,
 130         TEMP
 131 };
 132
 133 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
 134 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
 135
 136 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
 137 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
 138         0, 0, 306458 };
 139
 140 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
 141 {
 142         int ret;
 143
 144         if (data->sleep_state)
 145                 return -EBUSY;
 146
 147         switch (chan) {
 148         case TEMP:
 149                 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
 150                 if (ret < 0)
 151                         dev_err(&data->client->dev, "failed to read temp register\n");
 152                 break;
 153         default:
 154                 ret = i2c_smbus_read_word_data(data->client,
 155                         BMA180_ACC_X_LSB + chan * 2);
 156                 if (ret < 0)
 157                         dev_err(&data->client->dev,
 158                                 "failed to read accel_%c register\n",
 159                                 'x' + chan);
 160         }
 161
 162         return ret;
 163 }
 164
 165 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
 166 {
 167         int ret = i2c_smbus_read_byte_data(data->client, reg);
 168         u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
 169
 170         if (ret < 0)
 171                 return ret;
 172
 173         return i2c_smbus_write_byte_data(data->client, reg, reg_val);
 174 }
 175
 176 static int bma180_reset_intr(struct bma180_data *data)
 177 {
 178         int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
 179                 data->part_info->int_reset_mask, 1);
 180
 181         if (ret)
 182                 dev_err(&data->client->dev, "failed to reset interrupt\n");
 183
 184         return ret;
 185 }
 186
 187 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
 188 {
 189         int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
 190                         data->part_info->int_enable_mask, state);
 191         if (ret)
 192                 goto err;
 193         ret = bma180_reset_intr(data);
 194         if (ret)
 195                 goto err;
 196
 197         return 0;
 198
 199 err:
 200         dev_err(&data->client->dev,
 201                 "failed to set new data interrupt state %d\n", state);
 202         return ret;
 203 }
 204
 205 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
 206 {
 207         int ret = bma180_set_bits(data, data->part_info->sleep_reg,
 208                 data->part_info->sleep_mask, state);
 209
 210         if (ret) {
 211                 dev_err(&data->client->dev,
 212                         "failed to set sleep state %d\n", state);
 213                 return ret;
 214         }
 215         data->sleep_state = state;
 216
 217         return 0;
 218 }
 219
 220 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
 221 {
 222         int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
 223
 224         if (ret)
 225                 dev_err(&data->client->dev,
 226                         "failed to set ee writing state %d\n", state);
 227
 228         return ret;
 229 }
 230
 231 static int bma180_set_bw(struct bma180_data *data, int val)
 232 {
 233         int ret, i;
 234
 235         if (data->sleep_state)
 236                 return -EBUSY;
 237
 238         for (i = 0; i < data->part_info->num_bw; ++i) {
 239                 if (data->part_info->bw_table[i] == val) {
 240                         ret = bma180_set_bits(data, data->part_info->bw_reg,
 241                                 data->part_info->bw_mask, i);
 242                         if (ret) {
 243                                 dev_err(&data->client->dev,
 244                                         "failed to set bandwidth\n");
 245                                 return ret;
 246                         }
 247                         data->bw = val;
 248                         return 0;
 249                 }
 250         }
 251
 252         return -EINVAL;
 253 }
 254
 255 static int bma180_set_scale(struct bma180_data *data, int val)
 256 {
 257         int ret, i;
 258
 259         if (data->sleep_state)
 260                 return -EBUSY;
 261
 262         for (i = 0; i < data->part_info->num_scales; ++i)
 263                 if (data->part_info->scale_table[i] == val) {
 264                         ret = bma180_set_bits(data, data->part_info->scale_reg,
 265                                 data->part_info->scale_mask, i);
 266                         if (ret) {
 267                                 dev_err(&data->client->dev,
 268                                         "failed to set scale\n");
 269                                 return ret;
 270                         }
 271                         data->scale = val;
 272                         return 0;
 273                 }
 274
 275         return -EINVAL;
 276 }
 277
 278 static int bma180_set_pmode(struct bma180_data *data, bool mode)
 279 {
 280         u8 reg_val = mode ? data->part_info->lowpower_val : 0;
 281         int ret = bma180_set_bits(data, data->part_info->power_reg,
 282                 data->part_info->power_mask, reg_val);
 283
 284         if (ret) {
 285                 dev_err(&data->client->dev, "failed to set power mode\n");
 286                 return ret;
 287         }
 288         data->pmode = mode;
 289
 290         return 0;
 291 }
 292
 293 static int bma180_soft_reset(struct bma180_data *data)
 294 {
 295         int ret = i2c_smbus_write_byte_data(data->client,
 296                 data->part_info->softreset_reg, BMA180_RESET_VAL);
 297
 298         if (ret)
 299                 dev_err(&data->client->dev, "failed to reset the chip\n");
 300
 301         return ret;
 302 }
 303
 304 static int bma180_chip_init(struct bma180_data *data)
 305 {
 306         /* Try to read chip_id register. It must return 0x03. */
 307         int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
 308
 309         if (ret < 0)
 310                 return ret;
 311         if (ret != BMA180_ID_REG_VAL)
 312                 return -ENODEV;
 313
 314         ret = bma180_soft_reset(data);
 315         if (ret)
 316                 return ret;
 317         /*
 318          * No serial transaction should occur within minimum 10 us
 319          * after soft_reset command
 320          */
 321         msleep(20);
 322
 323         ret = bma180_set_new_data_intr_state(data, false);
 324         if (ret)
 325                 return ret;
 326
 327         return bma180_set_pmode(data, false);
 328 }
 329
 330 static int bma180_chip_config(struct bma180_data *data)
 331 {
 332         int ret = bma180_chip_init(data);
 333
 334         if (ret)
 335                 goto err;
 336         ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
 337         if (ret)
 338                 goto err;
 339         ret = bma180_set_ee_writing_state(data, true);
 340         if (ret)
 341                 goto err;
 342         ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
 343         if (ret)
 344                 goto err;
 345         ret = bma180_set_bw(data, 20); /* 20 Hz */
 346         if (ret)
 347                 goto err;
 348         ret = bma180_set_scale(data, 2452); /* 2 G */
 349         if (ret)
 350                 goto err;
 351
 352         return 0;
 353
 354 err:
 355         dev_err(&data->client->dev, "failed to config the chip\n");
 356         return ret;
 357 }
 358
 359 static int bma250_chip_config(struct bma180_data *data)
 360 {
 361         int ret = bma180_chip_init(data);
 362
 363         if (ret)
 364                 goto err;
 365         ret = bma180_set_bw(data, 16); /* 16 Hz */
 366         if (ret)
 367                 goto err;
 368         ret = bma180_set_scale(data, 38344); /* 2 G */
 369         if (ret)
 370                 goto err;
 371         ret = bma180_set_bits(data, BMA250_INT_MAP_REG,
 372                 BMA250_INT1_DATA_MASK, 1);
 373         if (ret)
 374                 goto err;
 375
 376         return 0;
 377
 378 err:
 379         dev_err(&data->client->dev, "failed to config the chip\n");
 380         return ret;
 381 }
 382
 383 static void bma180_chip_disable(struct bma180_data *data)
 384 {
 385         if (bma180_set_new_data_intr_state(data, false))
 386                 goto err;
 387         if (bma180_set_ee_writing_state(data, false))
 388                 goto err;
 389         if (bma180_set_sleep_state(data, true))
 390                 goto err;
 391
 392         return;
 393
 394 err:
 395         dev_err(&data->client->dev, "failed to disable the chip\n");
 396 }
 397
 398 static void bma250_chip_disable(struct bma180_data *data)
 399 {
 400         if (bma180_set_new_data_intr_state(data, false))
 401                 goto err;
 402         if (bma180_set_sleep_state(data, true))
 403                 goto err;
 404
 405         return;
 406
 407 err:
 408         dev_err(&data->client->dev, "failed to disable the chip\n");
 409 }
 410
 411 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
 412                                  bool micros)
 413 {
 414         size_t len = 0;
 415         int i;
 416
 417         for (i = 0; i < n; i++) {
 418                 if (!vals[i])
 419                         continue;
 420                 len += scnprintf(buf + len, PAGE_SIZE - len,
 421                         micros ? "0.%06d " : "%d ", vals[i]);
 422         }
 423         buf[len - 1] = '\n';
 424
 425         return len;
 426 }
 427
 428 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
 429                                 struct device_attribute *attr, char *buf)
 430 {
 431         struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
 432
 433         return bma180_show_avail(buf, data->part_info->bw_table,
 434                 data->part_info->num_bw, false);
 435 }
 436
 437 static ssize_t bma180_show_scale_avail(struct device *dev,
 438                                 struct device_attribute *attr, char *buf)
 439 {
 440         struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
 441
 442         return bma180_show_avail(buf, data->part_info->scale_table,
 443                 data->part_info->num_scales, true);
 444 }
 445
 446 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
 447         S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
 448
 449 static IIO_DEVICE_ATTR(in_accel_scale_available,
 450         S_IRUGO, bma180_show_scale_avail, NULL, 0);
 451
 452 static struct attribute *bma180_attributes[] = {
 453         &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
 454                 dev_attr.attr,
 455         &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
 456         NULL,
 457 };
 458
 459 static const struct attribute_group bma180_attrs_group = {
 460         .attrs = bma180_attributes,
 461 };
 462
 463 static int bma180_read_raw(struct iio_dev *indio_dev,
 464                 struct iio_chan_spec const *chan, int *val, int *val2,
 465                 long mask)
 466 {
 467         struct bma180_data *data = iio_priv(indio_dev);
 468         int ret;
 469
 470         switch (mask) {
 471         case IIO_CHAN_INFO_RAW:
 472                 ret = iio_device_claim_direct_mode(indio_dev);
 473                 if (ret)
 474                         return ret;
 475
 476                 mutex_lock(&data->mutex);
 477                 ret = bma180_get_data_reg(data, chan->scan_index);
 478                 mutex_unlock(&data->mutex);
 479                 iio_device_release_direct_mode(indio_dev);
 480                 if (ret < 0)
 481                         return ret;
 482                 *val = sign_extend32(ret >> chan->scan_type.shift,
 483                         chan->scan_type.realbits - 1);
 484                 return IIO_VAL_INT;
 485         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 486                 *val = data->bw;
 487                 return IIO_VAL_INT;
 488         case IIO_CHAN_INFO_SCALE:
 489                 switch (chan->type) {
 490                 case IIO_ACCEL:
 491                         *val = 0;
 492                         *val2 = data->scale;
 493                         return IIO_VAL_INT_PLUS_MICRO;
 494                 case IIO_TEMP:
 495                         *val = 500;
 496                         return IIO_VAL_INT;
 497                 default:
 498                         return -EINVAL;
 499                 }
 500         case IIO_CHAN_INFO_OFFSET:
 501                 *val = 48; /* 0 LSB @ 24 degree C */
 502                 return IIO_VAL_INT;
 503         default:
 504                 return -EINVAL;
 505         }
 506 }
 507
 508 static int bma180_write_raw(struct iio_dev *indio_dev,
 509                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 510 {
 511         struct bma180_data *data = iio_priv(indio_dev);
 512         int ret;
 513
 514         switch (mask) {
 515         case IIO_CHAN_INFO_SCALE:
 516                 if (val)
 517                         return -EINVAL;
 518                 mutex_lock(&data->mutex);
 519                 ret = bma180_set_scale(data, val2);
 520                 mutex_unlock(&data->mutex);
 521                 return ret;
 522         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 523                 if (val2)
 524                         return -EINVAL;
 525                 mutex_lock(&data->mutex);
 526                 ret = bma180_set_bw(data, val);
 527                 mutex_unlock(&data->mutex);
 528                 return ret;
 529         default:
 530                 return -EINVAL;
 531         }
 532 }
 533
 534 static const struct iio_info bma180_info = {
 535         .attrs                  = &bma180_attrs_group,
 536         .read_raw               = bma180_read_raw,
 537         .write_raw              = bma180_write_raw,
 538         .driver_module          = THIS_MODULE,
 539 };
 540
 541 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
 542
 543 static int bma180_get_power_mode(struct iio_dev *indio_dev,
 544                 const struct iio_chan_spec *chan)
 545 {
 546         struct bma180_data *data = iio_priv(indio_dev);
 547
 548         return data->pmode;
 549 }
 550
 551 static int bma180_set_power_mode(struct iio_dev *indio_dev,
 552                 const struct iio_chan_spec *chan, unsigned int mode)
 553 {
 554         struct bma180_data *data = iio_priv(indio_dev);
 555         int ret;
 556
 557         mutex_lock(&data->mutex);
 558         ret = bma180_set_pmode(data, mode);
 559         mutex_unlock(&data->mutex);
 560
 561         return ret;
 562 }
 563
 564 static const struct iio_enum bma180_power_mode_enum = {
 565         .items = bma180_power_modes,
 566         .num_items = ARRAY_SIZE(bma180_power_modes),
 567         .get = bma180_get_power_mode,
 568         .set = bma180_set_power_mode,
 569 };
 570
 571 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 572         IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
 573         IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
 574         { },
 575 };
 576
 577 #define BMA180_ACC_CHANNEL(_axis, _bits) {                              \
 578         .type = IIO_ACCEL,                                              \
 579         .modified = 1,                                                  \
 580         .channel2 = IIO_MOD_##_axis,                                    \
 581         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),                   \
 582         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |          \
 583                 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),       \
 584         .scan_index = AXIS_##_axis,                                     \
 585         .scan_type = {                                                  \
 586                 .sign = 's',                                            \
 587                 .realbits = _bits,                                      \
 588                 .storagebits = 16,                                      \
 589                 .shift = 16 - _bits,                                    \
 590         },                                                              \
 591         .ext_info = bma180_ext_info,                                    \
 592 }
 593
 594 #define BMA180_TEMP_CHANNEL {                                           \
 595         .type = IIO_TEMP,                                               \
 596         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |                  \
 597                 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),   \
 598         .scan_index = TEMP,                                             \
 599         .scan_type = {                                                  \
 600                 .sign = 's',                                            \
 601                 .realbits = 8,                                          \
 602                 .storagebits = 16,                                      \
 603         },                                                              \
 604 }
 605
 606 static const struct iio_chan_spec bma180_channels[] = {
 607         BMA180_ACC_CHANNEL(X, 14),
 608         BMA180_ACC_CHANNEL(Y, 14),
 609         BMA180_ACC_CHANNEL(Z, 14),
 610         BMA180_TEMP_CHANNEL,
 611         IIO_CHAN_SOFT_TIMESTAMP(4),
 612 };
 613
 614 static const struct iio_chan_spec bma250_channels[] = {
 615         BMA180_ACC_CHANNEL(X, 10),
 616         BMA180_ACC_CHANNEL(Y, 10),
 617         BMA180_ACC_CHANNEL(Z, 10),
 618         BMA180_TEMP_CHANNEL,
 619         IIO_CHAN_SOFT_TIMESTAMP(4),
 620 };
 621
 622 static const struct bma180_part_info bma180_part_info[] = {
 623         [BMA180] = {
 624                 bma180_channels, ARRAY_SIZE(bma180_channels),
 625                 bma180_scale_table, ARRAY_SIZE(bma180_scale_table),
 626                 bma180_bw_table, ARRAY_SIZE(bma180_bw_table),
 627                 BMA180_CTRL_REG0, BMA180_RESET_INT,
 628                 BMA180_CTRL_REG0, BMA180_SLEEP,
 629                 BMA180_BW_TCS, BMA180_BW,
 630                 BMA180_OFFSET_LSB1, BMA180_RANGE,
 631                 BMA180_TCO_Z, BMA180_MODE_CONFIG, BMA180_LOW_POWER,
 632                 BMA180_CTRL_REG3, BMA180_NEW_DATA_INT,
 633                 BMA180_RESET,
 634                 bma180_chip_config,
 635                 bma180_chip_disable,
 636         },
 637         [BMA250] = {
 638                 bma250_channels, ARRAY_SIZE(bma250_channels),
 639                 bma250_scale_table, ARRAY_SIZE(bma250_scale_table),
 640                 bma250_bw_table, ARRAY_SIZE(bma250_bw_table),
 641                 BMA250_INT_RESET_REG, BMA250_INT_RESET_MASK,
 642                 BMA250_POWER_REG, BMA250_SUSPEND_MASK,
 643                 BMA250_BW_REG, BMA250_BW_MASK,
 644                 BMA250_RANGE_REG, BMA250_RANGE_MASK,
 645                 BMA250_POWER_REG, BMA250_LOWPOWER_MASK, 1,
 646                 BMA250_INT_ENABLE_REG, BMA250_DATA_INTEN_MASK,
 647                 BMA250_RESET_REG,
 648                 bma250_chip_config,
 649                 bma250_chip_disable,
 650         },
 651 };
 652
 653 static irqreturn_t bma180_trigger_handler(int irq, void *p)
 654 {
 655         struct iio_poll_func *pf = p;
 656         struct iio_dev *indio_dev = pf->indio_dev;
 657         struct bma180_data *data = iio_priv(indio_dev);
 658         s64 time_ns = iio_get_time_ns(indio_dev);
 659         int bit, ret, i = 0;
 660
 661         mutex_lock(&data->mutex);
 662
 663         for_each_set_bit(bit, indio_dev->active_scan_mask,
 664                          indio_dev->masklength) {
 665                 ret = bma180_get_data_reg(data, bit);
 666                 if (ret < 0) {
 667                         mutex_unlock(&data->mutex);
 668                         goto err;
 669                 }
 670                 ((s16 *)data->buff)[i++] = ret;
 671         }
 672
 673         mutex_unlock(&data->mutex);
 674
 675         iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
 676 err:
 677         iio_trigger_notify_done(indio_dev->trig);
 678
 679         return IRQ_HANDLED;
 680 }
 681
 682 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
 683                 bool state)
 684 {
 685         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 686         struct bma180_data *data = iio_priv(indio_dev);
 687
 688         return bma180_set_new_data_intr_state(data, state);
 689 }
 690
 691 static int bma180_trig_try_reen(struct iio_trigger *trig)
 692 {
 693         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 694         struct bma180_data *data = iio_priv(indio_dev);
 695
 696         return bma180_reset_intr(data);
 697 }
 698
 699 static const struct iio_trigger_ops bma180_trigger_ops = {
 700         .set_trigger_state = bma180_data_rdy_trigger_set_state,
 701         .try_reenable = bma180_trig_try_reen,
 702         .owner = THIS_MODULE,
 703 };
 704
 705 static int bma180_probe(struct i2c_client *client,
 706                 const struct i2c_device_id *id)
 707 {
 708         struct bma180_data *data;
 709         struct iio_dev *indio_dev;
 710         int ret;
 711
 712         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 713         if (!indio_dev)
 714                 return -ENOMEM;
 715
 716         data = iio_priv(indio_dev);
 717         i2c_set_clientdata(client, indio_dev);
 718         data->client = client;
 719         data->part_info = &bma180_part_info[id->driver_data];
 720
 721         ret = data->part_info->chip_config(data);
 722         if (ret < 0)
 723                 goto err_chip_disable;
 724
 725         mutex_init(&data->mutex);
 726         indio_dev->dev.parent = &client->dev;
 727         indio_dev->channels = data->part_info->channels;
 728         indio_dev->num_channels = data->part_info->num_channels;
 729         indio_dev->name = id->name;
 730         indio_dev->modes = INDIO_DIRECT_MODE;
 731         indio_dev->info = &bma180_info;
 732
 733         if (client->irq > 0) {
 734                 data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
 735                         indio_dev->id);
 736                 if (!data->trig) {
 737                         ret = -ENOMEM;
 738                         goto err_chip_disable;
 739                 }
 740
 741                 ret = devm_request_irq(&client->dev, client->irq,
 742                         iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
 743                         "bma180_event", data->trig);
 744                 if (ret) {
 745                         dev_err(&client->dev, "unable to request IRQ\n");
 746                         goto err_trigger_free;
 747                 }
 748
 749                 data->trig->dev.parent = &client->dev;
 750                 data->trig->ops = &bma180_trigger_ops;
 751                 iio_trigger_set_drvdata(data->trig, indio_dev);
 752                 indio_dev->trig = iio_trigger_get(data->trig);
 753
 754                 ret = iio_trigger_register(data->trig);
 755                 if (ret)
 756                         goto err_trigger_free;
 757         }
 758
 759         ret = iio_triggered_buffer_setup(indio_dev, NULL,
 760                         bma180_trigger_handler, NULL);
 761         if (ret < 0) {
 762                 dev_err(&client->dev, "unable to setup iio triggered buffer\n");
 763                 goto err_trigger_unregister;
 764         }
 765
 766         ret = iio_device_register(indio_dev);
 767         if (ret < 0) {
 768                 dev_err(&client->dev, "unable to register iio device\n");
 769                 goto err_buffer_cleanup;
 770         }
 771
 772         return 0;
 773
 774 err_buffer_cleanup:
 775         iio_triggered_buffer_cleanup(indio_dev);
 776 err_trigger_unregister:
 777         if (data->trig)
 778                 iio_trigger_unregister(data->trig);
 779 err_trigger_free:
 780         iio_trigger_free(data->trig);
 781 err_chip_disable:
 782         data->part_info->chip_disable(data);
 783
 784         return ret;
 785 }
 786
 787 static int bma180_remove(struct i2c_client *client)
 788 {
 789         struct iio_dev *indio_dev = i2c_get_clientdata(client);
 790         struct bma180_data *data = iio_priv(indio_dev);
 791
 792         iio_device_unregister(indio_dev);
 793         iio_triggered_buffer_cleanup(indio_dev);
 794         if (data->trig) {
 795                 iio_trigger_unregister(data->trig);
 796                 iio_trigger_free(data->trig);
 797         }
 798
 799         mutex_lock(&data->mutex);
 800         data->part_info->chip_disable(data);
 801         mutex_unlock(&data->mutex);
 802
 803         return 0;
 804 }
 805
 806 #ifdef CONFIG_PM_SLEEP
 807 static int bma180_suspend(struct device *dev)
 808 {
 809         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 810         struct bma180_data *data = iio_priv(indio_dev);
 811         int ret;
 812
 813         mutex_lock(&data->mutex);
 814         ret = bma180_set_sleep_state(data, true);
 815         mutex_unlock(&data->mutex);
 816
 817         return ret;
 818 }
 819
 820 static int bma180_resume(struct device *dev)
 821 {
 822         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 823         struct bma180_data *data = iio_priv(indio_dev);
 824         int ret;
 825
 826         mutex_lock(&data->mutex);
 827         ret = bma180_set_sleep_state(data, false);
 828         mutex_unlock(&data->mutex);
 829
 830         return ret;
 831 }
 832
 833 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
 834 #define BMA180_PM_OPS (&bma180_pm_ops)
 835 #else
 836 #define BMA180_PM_OPS NULL
 837 #endif
 838
 839 static struct i2c_device_id bma180_ids[] = {
 840         { "bma180", BMA180 },
 841         { "bma250", BMA250 },
 842         { }
 843 };
 844
 845 MODULE_DEVICE_TABLE(i2c, bma180_ids);
 846
 847 static struct i2c_driver bma180_driver = {
 848         .driver = {
 849                 .name   = "bma180",
 850                 .pm     = BMA180_PM_OPS,
 851         },
 852         .probe          = bma180_probe,
 853         .remove         = bma180_remove,
 854         .id_table       = bma180_ids,
 855 };
 856
 857 module_i2c_driver(bma180_driver);
 858
 859 MODULE_AUTHOR("Kravchenko Oleksandr <[email protected]>");
 860 MODULE_AUTHOR("Texas Instruments, Inc.");
 861 MODULE_DESCRIPTION("Bosch BMA180/BMA250 triaxial acceleration sensor");
 862 MODULE_LICENSE("GPL");