drivers/iio/accel/bma180.c

   1 /*
   2  * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
   3  *
   4  * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
   5  *
   6  * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
   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, bw_offset;
  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_BW_OFFSET        8
 109 #define BMA250_SUSPEND_MASK     BIT(7) /* chip will sleep */
 110 #define BMA250_LOWPOWER_MASK    BIT(6)
 111 #define BMA250_DATA_INTEN_MASK  BIT(4)
 112 #define BMA250_INT1_DATA_MASK   BIT(0)
 113 #define BMA250_INT_RESET_MASK   BIT(7) /* Reset pending interrupts */
 114
 115 struct bma180_data {
 116         struct i2c_client *client;
 117         struct iio_trigger *trig;
 118         const struct bma180_part_info *part_info;
 119         struct mutex mutex;
 120         bool sleep_state;
 121         int scale;
 122         int bw;
 123         bool pmode;
 124         /* Ensure timestamp is naturally aligned */
 125         struct {
 126                 s16 chan[4];
 127                 s64 timestamp __aligned(8);
 128         } scan;
 129 };
 130
 131 enum bma180_chan {
 132         AXIS_X,
 133         AXIS_Y,
 134         AXIS_Z,
 135         TEMP
 136 };
 137
 138 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
 139 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
 140
 141 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
 142 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
 143         0, 0, 306458 };
 144
 145 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
 146 {
 147         int ret;
 148
 149         if (data->sleep_state)
 150                 return -EBUSY;
 151
 152         switch (chan) {
 153         case TEMP:
 154                 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
 155                 if (ret < 0)
 156                         dev_err(&data->client->dev, "failed to read temp register\n");
 157                 break;
 158         default:
 159                 ret = i2c_smbus_read_word_data(data->client,
 160                         BMA180_ACC_X_LSB + chan * 2);
 161                 if (ret < 0)
 162                         dev_err(&data->client->dev,
 163                                 "failed to read accel_%c register\n",
 164                                 'x' + chan);
 165         }
 166
 167         return ret;
 168 }
 169
 170 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
 171 {
 172         int ret = i2c_smbus_read_byte_data(data->client, reg);
 173         u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
 174
 175         if (ret < 0)
 176                 return ret;
 177
 178         return i2c_smbus_write_byte_data(data->client, reg, reg_val);
 179 }
 180
 181 static int bma180_reset_intr(struct bma180_data *data)
 182 {
 183         int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
 184                 data->part_info->int_reset_mask, 1);
 185
 186         if (ret)
 187                 dev_err(&data->client->dev, "failed to reset interrupt\n");
 188
 189         return ret;
 190 }
 191
 192 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
 193 {
 194         int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
 195                         data->part_info->int_enable_mask, state);
 196         if (ret)
 197                 goto err;
 198         ret = bma180_reset_intr(data);
 199         if (ret)
 200                 goto err;
 201
 202         return 0;
 203
 204 err:
 205         dev_err(&data->client->dev,
 206                 "failed to set new data interrupt state %d\n", state);
 207         return ret;
 208 }
 209
 210 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
 211 {
 212         int ret = bma180_set_bits(data, data->part_info->sleep_reg,
 213                 data->part_info->sleep_mask, state);
 214
 215         if (ret) {
 216                 dev_err(&data->client->dev,
 217                         "failed to set sleep state %d\n", state);
 218                 return ret;
 219         }
 220         data->sleep_state = state;
 221
 222         return 0;
 223 }
 224
 225 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
 226 {
 227         int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
 228
 229         if (ret)
 230                 dev_err(&data->client->dev,
 231                         "failed to set ee writing state %d\n", state);
 232
 233         return ret;
 234 }
 235
 236 static int bma180_set_bw(struct bma180_data *data, int val)
 237 {
 238         int ret, i;
 239
 240         if (data->sleep_state)
 241                 return -EBUSY;
 242
 243         for (i = 0; i < data->part_info->num_bw; ++i) {
 244                 if (data->part_info->bw_table[i] == val) {
 245                         ret = bma180_set_bits(data, data->part_info->bw_reg,
 246                                 data->part_info->bw_mask,
 247                                 i + data->part_info->bw_offset);
 248                         if (ret) {
 249                                 dev_err(&data->client->dev,
 250                                         "failed to set bandwidth\n");
 251                                 return ret;
 252                         }
 253                         data->bw = val;
 254                         return 0;
 255                 }
 256         }
 257
 258         return -EINVAL;
 259 }
 260
 261 static int bma180_set_scale(struct bma180_data *data, int val)
 262 {
 263         int ret, i;
 264
 265         if (data->sleep_state)
 266                 return -EBUSY;
 267
 268         for (i = 0; i < data->part_info->num_scales; ++i)
 269                 if (data->part_info->scale_table[i] == val) {
 270                         ret = bma180_set_bits(data, data->part_info->scale_reg,
 271                                 data->part_info->scale_mask, i);
 272                         if (ret) {
 273                                 dev_err(&data->client->dev,
 274                                         "failed to set scale\n");
 275                                 return ret;
 276                         }
 277                         data->scale = val;
 278                         return 0;
 279                 }
 280
 281         return -EINVAL;
 282 }
 283
 284 static int bma180_set_pmode(struct bma180_data *data, bool mode)
 285 {
 286         u8 reg_val = mode ? data->part_info->lowpower_val : 0;
 287         int ret = bma180_set_bits(data, data->part_info->power_reg,
 288                 data->part_info->power_mask, reg_val);
 289
 290         if (ret) {
 291                 dev_err(&data->client->dev, "failed to set power mode\n");
 292                 return ret;
 293         }
 294         data->pmode = mode;
 295
 296         return 0;
 297 }
 298
 299 static int bma180_soft_reset(struct bma180_data *data)
 300 {
 301         int ret = i2c_smbus_write_byte_data(data->client,
 302                 data->part_info->softreset_reg, BMA180_RESET_VAL);
 303
 304         if (ret)
 305                 dev_err(&data->client->dev, "failed to reset the chip\n");
 306
 307         return ret;
 308 }
 309
 310 static int bma180_chip_init(struct bma180_data *data)
 311 {
 312         /* Try to read chip_id register. It must return 0x03. */
 313         int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
 314
 315         if (ret < 0)
 316                 return ret;
 317         if (ret != BMA180_ID_REG_VAL)
 318                 return -ENODEV;
 319
 320         ret = bma180_soft_reset(data);
 321         if (ret)
 322                 return ret;
 323         /*
 324          * No serial transaction should occur within minimum 10 us
 325          * after soft_reset command
 326          */
 327         msleep(20);
 328
 329         ret = bma180_set_new_data_intr_state(data, false);
 330         if (ret)
 331                 return ret;
 332
 333         return bma180_set_pmode(data, false);
 334 }
 335
 336 static int bma180_chip_config(struct bma180_data *data)
 337 {
 338         int ret = bma180_chip_init(data);
 339
 340         if (ret)
 341                 goto err;
 342         ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
 343         if (ret)
 344                 goto err;
 345         ret = bma180_set_ee_writing_state(data, true);
 346         if (ret)
 347                 goto err;
 348         ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
 349         if (ret)
 350                 goto err;
 351         ret = bma180_set_bw(data, 20); /* 20 Hz */
 352         if (ret)
 353                 goto err;
 354         ret = bma180_set_scale(data, 2452); /* 2 G */
 355         if (ret)
 356                 goto err;
 357
 358         return 0;
 359
 360 err:
 361         dev_err(&data->client->dev, "failed to config the chip\n");
 362         return ret;
 363 }
 364
 365 static int bma250_chip_config(struct bma180_data *data)
 366 {
 367         int ret = bma180_chip_init(data);
 368
 369         if (ret)
 370                 goto err;
 371         ret = bma180_set_bw(data, 16); /* 16 Hz */
 372         if (ret)
 373                 goto err;
 374         ret = bma180_set_scale(data, 38344); /* 2 G */
 375         if (ret)
 376                 goto err;
 377         ret = bma180_set_bits(data, BMA250_INT_MAP_REG,
 378                 BMA250_INT1_DATA_MASK, 1);
 379         if (ret)
 380                 goto err;
 381
 382         return 0;
 383
 384 err:
 385         dev_err(&data->client->dev, "failed to config the chip\n");
 386         return ret;
 387 }
 388
 389 static void bma180_chip_disable(struct bma180_data *data)
 390 {
 391         if (bma180_set_new_data_intr_state(data, false))
 392                 goto err;
 393         if (bma180_set_ee_writing_state(data, false))
 394                 goto err;
 395         if (bma180_set_sleep_state(data, true))
 396                 goto err;
 397
 398         return;
 399
 400 err:
 401         dev_err(&data->client->dev, "failed to disable the chip\n");
 402 }
 403
 404 static void bma250_chip_disable(struct bma180_data *data)
 405 {
 406         if (bma180_set_new_data_intr_state(data, false))
 407                 goto err;
 408         if (bma180_set_sleep_state(data, true))
 409                 goto err;
 410
 411         return;
 412
 413 err:
 414         dev_err(&data->client->dev, "failed to disable the chip\n");
 415 }
 416
 417 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
 418                                  bool micros)
 419 {
 420         size_t len = 0;
 421         int i;
 422
 423         for (i = 0; i < n; i++) {
 424                 if (!vals[i])
 425                         continue;
 426                 len += scnprintf(buf + len, PAGE_SIZE - len,
 427                         micros ? "0.%06d " : "%d ", vals[i]);
 428         }
 429         buf[len - 1] = '\n';
 430
 431         return len;
 432 }
 433
 434 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
 435                                 struct device_attribute *attr, char *buf)
 436 {
 437         struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
 438
 439         return bma180_show_avail(buf, data->part_info->bw_table,
 440                 data->part_info->num_bw, false);
 441 }
 442
 443 static ssize_t bma180_show_scale_avail(struct device *dev,
 444                                 struct device_attribute *attr, char *buf)
 445 {
 446         struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
 447
 448         return bma180_show_avail(buf, data->part_info->scale_table,
 449                 data->part_info->num_scales, true);
 450 }
 451
 452 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
 453         S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
 454
 455 static IIO_DEVICE_ATTR(in_accel_scale_available,
 456         S_IRUGO, bma180_show_scale_avail, NULL, 0);
 457
 458 static struct attribute *bma180_attributes[] = {
 459         &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
 460                 dev_attr.attr,
 461         &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
 462         NULL,
 463 };
 464
 465 static const struct attribute_group bma180_attrs_group = {
 466         .attrs = bma180_attributes,
 467 };
 468
 469 static int bma180_read_raw(struct iio_dev *indio_dev,
 470                 struct iio_chan_spec const *chan, int *val, int *val2,
 471                 long mask)
 472 {
 473         struct bma180_data *data = iio_priv(indio_dev);
 474         int ret;
 475
 476         switch (mask) {
 477         case IIO_CHAN_INFO_RAW:
 478                 ret = iio_device_claim_direct_mode(indio_dev);
 479                 if (ret)
 480                         return ret;
 481
 482                 mutex_lock(&data->mutex);
 483                 ret = bma180_get_data_reg(data, chan->scan_index);
 484                 mutex_unlock(&data->mutex);
 485                 iio_device_release_direct_mode(indio_dev);
 486                 if (ret < 0)
 487                         return ret;
 488                 *val = sign_extend32(ret >> chan->scan_type.shift,
 489                         chan->scan_type.realbits - 1);
 490                 return IIO_VAL_INT;
 491         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 492                 *val = data->bw;
 493                 return IIO_VAL_INT;
 494         case IIO_CHAN_INFO_SCALE:
 495                 switch (chan->type) {
 496                 case IIO_ACCEL:
 497                         *val = 0;
 498                         *val2 = data->scale;
 499                         return IIO_VAL_INT_PLUS_MICRO;
 500                 case IIO_TEMP:
 501                         *val = 500;
 502                         return IIO_VAL_INT;
 503                 default:
 504                         return -EINVAL;
 505                 }
 506         case IIO_CHAN_INFO_OFFSET:
 507                 *val = 48; /* 0 LSB @ 24 degree C */
 508                 return IIO_VAL_INT;
 509         default:
 510                 return -EINVAL;
 511         }
 512 }
 513
 514 static int bma180_write_raw(struct iio_dev *indio_dev,
 515                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 516 {
 517         struct bma180_data *data = iio_priv(indio_dev);
 518         int ret;
 519
 520         switch (mask) {
 521         case IIO_CHAN_INFO_SCALE:
 522                 if (val)
 523                         return -EINVAL;
 524                 mutex_lock(&data->mutex);
 525                 ret = bma180_set_scale(data, val2);
 526                 mutex_unlock(&data->mutex);
 527                 return ret;
 528         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 529                 if (val2)
 530                         return -EINVAL;
 531                 mutex_lock(&data->mutex);
 532                 ret = bma180_set_bw(data, val);
 533                 mutex_unlock(&data->mutex);
 534                 return ret;
 535         default:
 536                 return -EINVAL;
 537         }
 538 }
 539
 540 static const struct iio_info bma180_info = {
 541         .attrs                  = &bma180_attrs_group,
 542         .read_raw               = bma180_read_raw,
 543         .write_raw              = bma180_write_raw,
 544         .driver_module          = THIS_MODULE,
 545 };
 546
 547 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
 548
 549 static int bma180_get_power_mode(struct iio_dev *indio_dev,
 550                 const struct iio_chan_spec *chan)
 551 {
 552         struct bma180_data *data = iio_priv(indio_dev);
 553
 554         return data->pmode;
 555 }
 556
 557 static int bma180_set_power_mode(struct iio_dev *indio_dev,
 558                 const struct iio_chan_spec *chan, unsigned int mode)
 559 {
 560         struct bma180_data *data = iio_priv(indio_dev);
 561         int ret;
 562
 563         mutex_lock(&data->mutex);
 564         ret = bma180_set_pmode(data, mode);
 565         mutex_unlock(&data->mutex);
 566
 567         return ret;
 568 }
 569
 570 static const struct iio_enum bma180_power_mode_enum = {
 571         .items = bma180_power_modes,
 572         .num_items = ARRAY_SIZE(bma180_power_modes),
 573         .get = bma180_get_power_mode,
 574         .set = bma180_set_power_mode,
 575 };
 576
 577 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 578         IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
 579         IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
 580         { },
 581 };
 582
 583 #define BMA180_ACC_CHANNEL(_axis, _bits) {                              \
 584         .type = IIO_ACCEL,                                              \
 585         .modified = 1,                                                  \
 586         .channel2 = IIO_MOD_##_axis,                                    \
 587         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),                   \
 588         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |          \
 589                 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),       \
 590         .scan_index = AXIS_##_axis,                                     \
 591         .scan_type = {                                                  \
 592                 .sign = 's',                                            \
 593                 .realbits = _bits,                                      \
 594                 .storagebits = 16,                                      \
 595                 .shift = 16 - _bits,                                    \
 596         },                                                              \
 597         .ext_info = bma180_ext_info,                                    \
 598 }
 599
 600 #define BMA180_TEMP_CHANNEL {                                           \
 601         .type = IIO_TEMP,                                               \
 602         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |                  \
 603                 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET),   \
 604         .scan_index = TEMP,                                             \
 605         .scan_type = {                                                  \
 606                 .sign = 's',                                            \
 607                 .realbits = 8,                                          \
 608                 .storagebits = 16,                                      \
 609         },                                                              \
 610 }
 611
 612 static const struct iio_chan_spec bma180_channels[] = {
 613         BMA180_ACC_CHANNEL(X, 14),
 614         BMA180_ACC_CHANNEL(Y, 14),
 615         BMA180_ACC_CHANNEL(Z, 14),
 616         BMA180_TEMP_CHANNEL,
 617         IIO_CHAN_SOFT_TIMESTAMP(4),
 618 };
 619
 620 static const struct iio_chan_spec bma250_channels[] = {
 621         BMA180_ACC_CHANNEL(X, 10),
 622         BMA180_ACC_CHANNEL(Y, 10),
 623         BMA180_ACC_CHANNEL(Z, 10),
 624         BMA180_TEMP_CHANNEL,
 625         IIO_CHAN_SOFT_TIMESTAMP(4),
 626 };
 627
 628 static const struct bma180_part_info bma180_part_info[] = {
 629         [BMA180] = {
 630                 .channels = bma180_channels,
 631                 .num_channels = ARRAY_SIZE(bma180_channels),
 632                 .scale_table = bma180_scale_table,
 633                 .num_scales = ARRAY_SIZE(bma180_scale_table),
 634                 .bw_table = bma180_bw_table,
 635                 .num_bw = ARRAY_SIZE(bma180_bw_table),
 636                 .int_reset_reg = BMA180_CTRL_REG0,
 637                 .int_reset_mask = BMA180_RESET_INT,
 638                 .sleep_reg = BMA180_CTRL_REG0,
 639                 .sleep_mask = BMA180_SLEEP,
 640                 .bw_reg = BMA180_BW_TCS,
 641                 .bw_mask = BMA180_BW,
 642                 .scale_reg = BMA180_OFFSET_LSB1,
 643                 .scale_mask = BMA180_RANGE,
 644                 .power_reg = BMA180_TCO_Z,
 645                 .power_mask = BMA180_MODE_CONFIG,
 646                 .lowpower_val = BMA180_LOW_POWER,
 647                 .int_enable_reg = BMA180_CTRL_REG3,
 648                 .int_enable_mask = BMA180_NEW_DATA_INT,
 649                 .softreset_reg = BMA180_RESET,
 650                 .chip_config = bma180_chip_config,
 651                 .chip_disable = bma180_chip_disable,
 652         },
 653         [BMA250] = {
 654                 .channels = bma250_channels,
 655                 .num_channels = ARRAY_SIZE(bma250_channels),
 656                 .scale_table = bma250_scale_table,
 657                 .num_scales = ARRAY_SIZE(bma250_scale_table),
 658                 .bw_table = bma250_bw_table,
 659                 .num_bw = ARRAY_SIZE(bma250_bw_table),
 660                 .int_reset_reg = BMA250_INT_RESET_REG,
 661                 .int_reset_mask = BMA250_INT_RESET_MASK,
 662                 .sleep_reg = BMA250_POWER_REG,
 663                 .sleep_mask = BMA250_SUSPEND_MASK,
 664                 .bw_reg = BMA250_BW_REG,
 665                 .bw_mask = BMA250_BW_MASK,
 666                 .bw_offset = BMA250_BW_OFFSET,
 667                 .scale_reg = BMA250_RANGE_REG,
 668                 .scale_mask = BMA250_RANGE_MASK,
 669                 .power_reg = BMA250_POWER_REG,
 670                 .power_mask = BMA250_LOWPOWER_MASK,
 671                 .lowpower_val = 1,
 672                 .int_enable_reg = BMA250_INT_ENABLE_REG,
 673                 .int_enable_mask = BMA250_DATA_INTEN_MASK,
 674                 .softreset_reg = BMA250_RESET_REG,
 675                 .chip_config = bma250_chip_config,
 676                 .chip_disable = bma250_chip_disable,
 677         },
 678 };
 679
 680 static irqreturn_t bma180_trigger_handler(int irq, void *p)
 681 {
 682         struct iio_poll_func *pf = p;
 683         struct iio_dev *indio_dev = pf->indio_dev;
 684         struct bma180_data *data = iio_priv(indio_dev);
 685         s64 time_ns = iio_get_time_ns(indio_dev);
 686         int bit, ret, i = 0;
 687
 688         mutex_lock(&data->mutex);
 689
 690         for_each_set_bit(bit, indio_dev->active_scan_mask,
 691                          indio_dev->masklength) {
 692                 ret = bma180_get_data_reg(data, bit);
 693                 if (ret < 0) {
 694                         mutex_unlock(&data->mutex);
 695                         goto err;
 696                 }
 697                 data->scan.chan[i++] = ret;
 698         }
 699
 700         mutex_unlock(&data->mutex);
 701
 702         iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
 703 err:
 704         iio_trigger_notify_done(indio_dev->trig);
 705
 706         return IRQ_HANDLED;
 707 }
 708
 709 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
 710                 bool state)
 711 {
 712         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 713         struct bma180_data *data = iio_priv(indio_dev);
 714
 715         return bma180_set_new_data_intr_state(data, state);
 716 }
 717
 718 static int bma180_trig_try_reen(struct iio_trigger *trig)
 719 {
 720         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 721         struct bma180_data *data = iio_priv(indio_dev);
 722
 723         return bma180_reset_intr(data);
 724 }
 725
 726 static const struct iio_trigger_ops bma180_trigger_ops = {
 727         .set_trigger_state = bma180_data_rdy_trigger_set_state,
 728         .try_reenable = bma180_trig_try_reen,
 729         .owner = THIS_MODULE,
 730 };
 731
 732 static int bma180_probe(struct i2c_client *client,
 733                 const struct i2c_device_id *id)
 734 {
 735         struct bma180_data *data;
 736         struct iio_dev *indio_dev;
 737         int ret;
 738
 739         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 740         if (!indio_dev)
 741                 return -ENOMEM;
 742
 743         data = iio_priv(indio_dev);
 744         i2c_set_clientdata(client, indio_dev);
 745         data->client = client;
 746         data->part_info = &bma180_part_info[id->driver_data];
 747
 748         ret = data->part_info->chip_config(data);
 749         if (ret < 0)
 750                 goto err_chip_disable;
 751
 752         mutex_init(&data->mutex);
 753         indio_dev->dev.parent = &client->dev;
 754         indio_dev->channels = data->part_info->channels;
 755         indio_dev->num_channels = data->part_info->num_channels;
 756         indio_dev->name = id->name;
 757         indio_dev->modes = INDIO_DIRECT_MODE;
 758         indio_dev->info = &bma180_info;
 759
 760         if (client->irq > 0) {
 761                 data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
 762                         indio_dev->id);
 763                 if (!data->trig) {
 764                         ret = -ENOMEM;
 765                         goto err_chip_disable;
 766                 }
 767
 768                 ret = devm_request_irq(&client->dev, client->irq,
 769                         iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
 770                         "bma180_event", data->trig);
 771                 if (ret) {
 772                         dev_err(&client->dev, "unable to request IRQ\n");
 773                         goto err_trigger_free;
 774                 }
 775
 776                 data->trig->dev.parent = &client->dev;
 777                 data->trig->ops = &bma180_trigger_ops;
 778                 iio_trigger_set_drvdata(data->trig, indio_dev);
 779
 780                 ret = iio_trigger_register(data->trig);
 781                 if (ret)
 782                         goto err_trigger_free;
 783
 784                 indio_dev->trig = iio_trigger_get(data->trig);
 785         }
 786
 787         ret = iio_triggered_buffer_setup(indio_dev, NULL,
 788                         bma180_trigger_handler, NULL);
 789         if (ret < 0) {
 790                 dev_err(&client->dev, "unable to setup iio triggered buffer\n");
 791                 goto err_trigger_unregister;
 792         }
 793
 794         ret = iio_device_register(indio_dev);
 795         if (ret < 0) {
 796                 dev_err(&client->dev, "unable to register iio device\n");
 797                 goto err_buffer_cleanup;
 798         }
 799
 800         return 0;
 801
 802 err_buffer_cleanup:
 803         iio_triggered_buffer_cleanup(indio_dev);
 804 err_trigger_unregister:
 805         if (data->trig)
 806                 iio_trigger_unregister(data->trig);
 807 err_trigger_free:
 808         iio_trigger_free(data->trig);
 809 err_chip_disable:
 810         data->part_info->chip_disable(data);
 811
 812         return ret;
 813 }
 814
 815 static int bma180_remove(struct i2c_client *client)
 816 {
 817         struct iio_dev *indio_dev = i2c_get_clientdata(client);
 818         struct bma180_data *data = iio_priv(indio_dev);
 819
 820         iio_device_unregister(indio_dev);
 821         iio_triggered_buffer_cleanup(indio_dev);
 822         if (data->trig) {
 823                 iio_trigger_unregister(data->trig);
 824                 iio_trigger_free(data->trig);
 825         }
 826
 827         mutex_lock(&data->mutex);
 828         data->part_info->chip_disable(data);
 829         mutex_unlock(&data->mutex);
 830
 831         return 0;
 832 }
 833
 834 #ifdef CONFIG_PM_SLEEP
 835 static int bma180_suspend(struct device *dev)
 836 {
 837         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 838         struct bma180_data *data = iio_priv(indio_dev);
 839         int ret;
 840
 841         mutex_lock(&data->mutex);
 842         ret = bma180_set_sleep_state(data, true);
 843         mutex_unlock(&data->mutex);
 844
 845         return ret;
 846 }
 847
 848 static int bma180_resume(struct device *dev)
 849 {
 850         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 851         struct bma180_data *data = iio_priv(indio_dev);
 852         int ret;
 853
 854         mutex_lock(&data->mutex);
 855         ret = bma180_set_sleep_state(data, false);
 856         mutex_unlock(&data->mutex);
 857
 858         return ret;
 859 }
 860
 861 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
 862 #define BMA180_PM_OPS (&bma180_pm_ops)
 863 #else
 864 #define BMA180_PM_OPS NULL
 865 #endif
 866
 867 static struct i2c_device_id bma180_ids[] = {
 868         { "bma180", BMA180 },
 869         { "bma250", BMA250 },
 870         { }
 871 };
 872
 873 MODULE_DEVICE_TABLE(i2c, bma180_ids);
 874
 875 static struct i2c_driver bma180_driver = {
 876         .driver = {
 877                 .name   = "bma180",
 878                 .pm     = BMA180_PM_OPS,
 879         },
 880         .probe          = bma180_probe,
 881         .remove         = bma180_remove,
 882         .id_table       = bma180_ids,
 883 };
 884
 885 module_i2c_driver(bma180_driver);
 886
 887 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
 888 MODULE_AUTHOR("Texas Instruments, Inc.");
 889 MODULE_DESCRIPTION("Bosch BMA180/BMA250 triaxial acceleration sensor");
 890 MODULE_LICENSE("GPL");