drivers/iio/accel/st_accel_core.c

   1 /*
   2  * STMicroelectronics accelerometers driver
   3  *
   4  * Copyright 2012-2013 STMicroelectronics Inc.
   5  *
   6  * Denis Ciocca <denis.ciocca@st.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/errno.h>
  15 #include <linux/types.h>
  16 #include <linux/mutex.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/i2c.h>
  19 #include <linux/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/iio/iio.h>
  22 #include <linux/iio/sysfs.h>
  23 #include <linux/iio/trigger.h>
  24 #include <linux/iio/buffer.h>
  25
  26 #include <linux/iio/common/st_sensors.h>
  27 #include "st_accel.h"
  28
  29 #define ST_ACCEL_NUMBER_DATA_CHANNELS           3
  30
  31 /* DEFAULT VALUE FOR SENSORS */
  32 #define ST_ACCEL_DEFAULT_OUT_X_L_ADDR           0x28
  33 #define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR           0x2a
  34 #define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR           0x2c
  35
  36 /* FULLSCALE */
  37 #define ST_ACCEL_FS_AVL_2G                      2
  38 #define ST_ACCEL_FS_AVL_4G                      4
  39 #define ST_ACCEL_FS_AVL_6G                      6
  40 #define ST_ACCEL_FS_AVL_8G                      8
  41 #define ST_ACCEL_FS_AVL_16G                     16
  42 #define ST_ACCEL_FS_AVL_100G                    100
  43 #define ST_ACCEL_FS_AVL_200G                    200
  44 #define ST_ACCEL_FS_AVL_400G                    400
  45
  46 static const struct iio_chan_spec st_accel_8bit_channels[] = {
  47         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  48                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  49                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
  50                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1),
  51         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  52                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  53                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
  54                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1),
  55         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  56                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  57                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
  58                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1),
  59         IIO_CHAN_SOFT_TIMESTAMP(3)
  60 };
  61
  62 static const struct iio_chan_spec st_accel_12bit_channels[] = {
  63         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  64                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  65                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
  66                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
  67         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  68                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  69                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
  70                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
  71         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  72                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  73                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
  74                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
  75         IIO_CHAN_SOFT_TIMESTAMP(3)
  76 };
  77
  78 static const struct iio_chan_spec st_accel_16bit_channels[] = {
  79         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  80                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  81                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
  82                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
  83         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  84                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  85                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
  86                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
  87         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  88                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  89                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
  90                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
  91         IIO_CHAN_SOFT_TIMESTAMP(3)
  92 };
  93
  94 static const struct st_sensor_settings st_accel_sensors_settings[] = {
  95         {
  96                 .wai = 0x33,
  97                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
  98                 .sensors_supported = {
  99                         [0] = LIS3DH_ACCEL_DEV_NAME,
 100                         [1] = LSM303DLHC_ACCEL_DEV_NAME,
 101                         [2] = LSM330D_ACCEL_DEV_NAME,
 102                         [3] = LSM330DL_ACCEL_DEV_NAME,
 103                         [4] = LSM330DLC_ACCEL_DEV_NAME,
 104                         [5] = LSM303AGR_ACCEL_DEV_NAME,
 105                         [6] = LIS2DH12_ACCEL_DEV_NAME,
 106                 },
 107                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 108                 .odr = {
 109                         .addr = 0x20,
 110                         .mask = 0xf0,
 111                         .odr_avl = {
 112                                 { .hz = 1, .value = 0x01, },
 113                                 { .hz = 10, .value = 0x02, },
 114                                 { .hz = 25, .value = 0x03, },
 115                                 { .hz = 50, .value = 0x04, },
 116                                 { .hz = 100, .value = 0x05, },
 117                                 { .hz = 200, .value = 0x06, },
 118                                 { .hz = 400, .value = 0x07, },
 119                                 { .hz = 1600, .value = 0x08, },
 120                         },
 121                 },
 122                 .pw = {
 123                         .addr = 0x20,
 124                         .mask = 0xf0,
 125                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 126                 },
 127                 .enable_axis = {
 128                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 129                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 130                 },
 131                 .fs = {
 132                         .addr = 0x23,
 133                         .mask = 0x30,
 134                         .fs_avl = {
 135                                 [0] = {
 136                                         .num = ST_ACCEL_FS_AVL_2G,
 137                                         .value = 0x00,
 138                                         .gain = IIO_G_TO_M_S_2(1000),
 139                                 },
 140                                 [1] = {
 141                                         .num = ST_ACCEL_FS_AVL_4G,
 142                                         .value = 0x01,
 143                                         .gain = IIO_G_TO_M_S_2(2000),
 144                                 },
 145                                 [2] = {
 146                                         .num = ST_ACCEL_FS_AVL_8G,
 147                                         .value = 0x02,
 148                                         .gain = IIO_G_TO_M_S_2(4000),
 149                                 },
 150                                 [3] = {
 151                                         .num = ST_ACCEL_FS_AVL_16G,
 152                                         .value = 0x03,
 153                                         .gain = IIO_G_TO_M_S_2(12000),
 154                                 },
 155                         },
 156                 },
 157                 .bdu = {
 158                         .addr = 0x23,
 159                         .mask = 0x80,
 160                 },
 161                 .drdy_irq = {
 162                         .int1 = {
 163                                 .addr = 0x22,
 164                                 .mask = 0x10,
 165                         },
 166                         .addr_ihl = 0x25,
 167                         .mask_ihl = 0x02,
 168                         .stat_drdy = {
 169                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 170                                 .mask = 0x07,
 171                         },
 172                 },
 173                 .sim = {
 174                         .addr = 0x23,
 175                         .value = BIT(0),
 176                 },
 177                 .multi_read_bit = true,
 178                 .bootime = 2,
 179         },
 180         {
 181                 .wai = 0x32,
 182                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 183                 .sensors_supported = {
 184                         [0] = LIS331DLH_ACCEL_DEV_NAME,
 185                         [1] = LSM303DL_ACCEL_DEV_NAME,
 186                         [2] = LSM303DLH_ACCEL_DEV_NAME,
 187                         [3] = LSM303DLM_ACCEL_DEV_NAME,
 188                 },
 189                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 190                 .odr = {
 191                         .addr = 0x20,
 192                         .mask = 0x18,
 193                         .odr_avl = {
 194                                 { .hz = 50, .value = 0x00, },
 195                                 { .hz = 100, .value = 0x01, },
 196                                 { .hz = 400, .value = 0x02, },
 197                                 { .hz = 1000, .value = 0x03, },
 198                         },
 199                 },
 200                 .pw = {
 201                         .addr = 0x20,
 202                         .mask = 0xe0,
 203                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 204                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 205                 },
 206                 .enable_axis = {
 207                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 208                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 209                 },
 210                 .fs = {
 211                         .addr = 0x23,
 212                         .mask = 0x30,
 213                         .fs_avl = {
 214                                 [0] = {
 215                                         .num = ST_ACCEL_FS_AVL_2G,
 216                                         .value = 0x00,
 217                                         .gain = IIO_G_TO_M_S_2(1000),
 218                                 },
 219                                 [1] = {
 220                                         .num = ST_ACCEL_FS_AVL_4G,
 221                                         .value = 0x01,
 222                                         .gain = IIO_G_TO_M_S_2(2000),
 223                                 },
 224                                 [2] = {
 225                                         .num = ST_ACCEL_FS_AVL_8G,
 226                                         .value = 0x03,
 227                                         .gain = IIO_G_TO_M_S_2(3900),
 228                                 },
 229                         },
 230                 },
 231                 .bdu = {
 232                         .addr = 0x23,
 233                         .mask = 0x80,
 234                 },
 235                 .drdy_irq = {
 236                         .int1 = {
 237                                 .addr = 0x22,
 238                                 .mask = 0x02,
 239                                 .addr_od = 0x22,
 240                                 .mask_od = 0x40,
 241                         },
 242                         .int2 = {
 243                                 .addr = 0x22,
 244                                 .mask = 0x10,
 245                                 .addr_od = 0x22,
 246                                 .mask_od = 0x40,
 247                         },
 248                         .addr_ihl = 0x22,
 249                         .mask_ihl = 0x80,
 250                         .stat_drdy = {
 251                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 252                                 .mask = 0x07,
 253                         },
 254                 },
 255                 .sim = {
 256                         .addr = 0x23,
 257                         .value = BIT(0),
 258                 },
 259                 .multi_read_bit = true,
 260                 .bootime = 2,
 261         },
 262         {
 263                 .wai = 0x40,
 264                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 265                 .sensors_supported = {
 266                         [0] = LSM330_ACCEL_DEV_NAME,
 267                 },
 268                 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
 269                 .odr = {
 270                         .addr = 0x20,
 271                         .mask = 0xf0,
 272                         .odr_avl = {
 273                                 { .hz = 3, .value = 0x01, },
 274                                 { .hz = 6, .value = 0x02, },
 275                                 { .hz = 12, .value = 0x03, },
 276                                 { .hz = 25, .value = 0x04, },
 277                                 { .hz = 50, .value = 0x05, },
 278                                 { .hz = 100, .value = 0x06, },
 279                                 { .hz = 200, .value = 0x07, },
 280                                 { .hz = 400, .value = 0x08, },
 281                                 { .hz = 800, .value = 0x09, },
 282                                 { .hz = 1600, .value = 0x0a, },
 283                         },
 284                 },
 285                 .pw = {
 286                         .addr = 0x20,
 287                         .mask = 0xf0,
 288                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 289                 },
 290                 .enable_axis = {
 291                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 292                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 293                 },
 294                 .fs = {
 295                         .addr = 0x24,
 296                         .mask = 0x38,
 297                         .fs_avl = {
 298                                 [0] = {
 299                                         .num = ST_ACCEL_FS_AVL_2G,
 300                                         .value = 0x00,
 301                                         .gain = IIO_G_TO_M_S_2(61),
 302                                 },
 303                                 [1] = {
 304                                         .num = ST_ACCEL_FS_AVL_4G,
 305                                         .value = 0x01,
 306                                         .gain = IIO_G_TO_M_S_2(122),
 307                                 },
 308                                 [2] = {
 309                                         .num = ST_ACCEL_FS_AVL_6G,
 310                                         .value = 0x02,
 311                                         .gain = IIO_G_TO_M_S_2(183),
 312                                 },
 313                                 [3] = {
 314                                         .num = ST_ACCEL_FS_AVL_8G,
 315                                         .value = 0x03,
 316                                         .gain = IIO_G_TO_M_S_2(244),
 317                                 },
 318                                 [4] = {
 319                                         .num = ST_ACCEL_FS_AVL_16G,
 320                                         .value = 0x04,
 321                                         .gain = IIO_G_TO_M_S_2(732),
 322                                 },
 323                         },
 324                 },
 325                 .bdu = {
 326                         .addr = 0x20,
 327                         .mask = 0x08,
 328                 },
 329                 .drdy_irq = {
 330                         .int1 = {
 331                                 .addr = 0x23,
 332                                 .mask = 0x80,
 333                         },
 334                         .addr_ihl = 0x23,
 335                         .mask_ihl = 0x40,
 336                         .stat_drdy = {
 337                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 338                                 .mask = 0x07,
 339                         },
 340                         .ig1 = {
 341                                 .en_addr = 0x23,
 342                                 .en_mask = 0x08,
 343                         },
 344                 },
 345                 .sim = {
 346                         .addr = 0x24,
 347                         .value = BIT(0),
 348                 },
 349                 .multi_read_bit = false,
 350                 .bootime = 2,
 351         },
 352         {
 353                 .wai = 0x3a,
 354                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 355                 .sensors_supported = {
 356                         [0] = LIS3LV02DL_ACCEL_DEV_NAME,
 357                 },
 358                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 359                 .odr = {
 360                         .addr = 0x20,
 361                         .mask = 0x30, /* DF1 and DF0 */
 362                         .odr_avl = {
 363                                 { .hz = 40, .value = 0x00, },
 364                                 { .hz = 160, .value = 0x01, },
 365                                 { .hz = 640, .value = 0x02, },
 366                                 { .hz = 2560, .value = 0x03, },
 367                         },
 368                 },
 369                 .pw = {
 370                         .addr = 0x20,
 371                         .mask = 0xc0,
 372                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 373                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 374                 },
 375                 .enable_axis = {
 376                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 377                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 378                 },
 379                 .fs = {
 380                         .addr = 0x21,
 381                         .mask = 0x80,
 382                         .fs_avl = {
 383                                 [0] = {
 384                                         .num = ST_ACCEL_FS_AVL_2G,
 385                                         .value = 0x00,
 386                                         .gain = IIO_G_TO_M_S_2(1000),
 387                                 },
 388                                 [1] = {
 389                                         .num = ST_ACCEL_FS_AVL_6G,
 390                                         .value = 0x01,
 391                                         .gain = IIO_G_TO_M_S_2(3000),
 392                                 },
 393                         },
 394                 },
 395                 .bdu = {
 396                         .addr = 0x21,
 397                         .mask = 0x40,
 398                 },
 399                 /*
 400                  * Data Alignment Setting - needs to be set to get
 401                  * left-justified data like all other sensors.
 402                  */
 403                 .das = {
 404                         .addr = 0x21,
 405                         .mask = 0x01,
 406                 },
 407                 .drdy_irq = {
 408                         .int1 = {
 409                                 .addr = 0x21,
 410                                 .mask = 0x04,
 411                         },
 412                         .stat_drdy = {
 413                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 414                                 .mask = 0x07,
 415                         },
 416                 },
 417                 .sim = {
 418                         .addr = 0x21,
 419                         .value = BIT(1),
 420                 },
 421                 .multi_read_bit = true,
 422                 .bootime = 2, /* guess */
 423         },
 424         {
 425                 .wai = 0x3b,
 426                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 427                 .sensors_supported = {
 428                         [0] = LIS331DL_ACCEL_DEV_NAME,
 429                 },
 430                 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
 431                 .odr = {
 432                         .addr = 0x20,
 433                         .mask = 0x80,
 434                         .odr_avl = {
 435                                 { .hz = 100, .value = 0x00, },
 436                                 { .hz = 400, .value = 0x01, },
 437                         },
 438                 },
 439                 .pw = {
 440                         .addr = 0x20,
 441                         .mask = 0x40,
 442                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 443                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 444                 },
 445                 .enable_axis = {
 446                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 447                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 448                 },
 449                 .fs = {
 450                         .addr = 0x20,
 451                         .mask = 0x20,
 452                         /*
 453                          * TODO: check these resulting gain settings, these are
 454                          * not in the datsheet
 455                          */
 456                         .fs_avl = {
 457                                 [0] = {
 458                                         .num = ST_ACCEL_FS_AVL_2G,
 459                                         .value = 0x00,
 460                                         .gain = IIO_G_TO_M_S_2(18000),
 461                                 },
 462                                 [1] = {
 463                                         .num = ST_ACCEL_FS_AVL_8G,
 464                                         .value = 0x01,
 465                                         .gain = IIO_G_TO_M_S_2(72000),
 466                                 },
 467                         },
 468                 },
 469                 .drdy_irq = {
 470                         .int1 = {
 471                                 .addr = 0x22,
 472                                 .mask = 0x04,
 473                                 .addr_od = 0x22,
 474                                 .mask_od = 0x40,
 475                         },
 476                         .int2 = {
 477                                 .addr = 0x22,
 478                                 .mask = 0x20,
 479                                 .addr_od = 0x22,
 480                                 .mask_od = 0x40,
 481                         },
 482                         .addr_ihl = 0x22,
 483                         .mask_ihl = 0x80,
 484                         .stat_drdy = {
 485                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 486                                 .mask = 0x07,
 487                         },
 488                 },
 489                 .sim = {
 490                         .addr = 0x21,
 491                         .value = BIT(7),
 492                 },
 493                 .multi_read_bit = false,
 494                 .bootime = 2, /* guess */
 495         },
 496         {
 497                 .wai = 0x32,
 498                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 499                 .sensors_supported = {
 500                         [0] = H3LIS331DL_ACCEL_DEV_NAME,
 501                 },
 502                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 503                 .odr = {
 504                         .addr = 0x20,
 505                         .mask = 0x18,
 506                         .odr_avl = {
 507                                 { .hz = 50, .value = 0x00, },
 508                                 { .hz = 100, .value = 0x01, },
 509                                 { .hz = 400, .value = 0x02, },
 510                                 { .hz = 1000, .value = 0x03, },
 511                         },
 512                 },
 513                 .pw = {
 514                         .addr = 0x20,
 515                         .mask = 0x20,
 516                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 517                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 518                 },
 519                 .enable_axis = {
 520                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 521                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 522                 },
 523                 .fs = {
 524                         .addr = 0x23,
 525                         .mask = 0x30,
 526                         .fs_avl = {
 527                                 [0] = {
 528                                         .num = ST_ACCEL_FS_AVL_100G,
 529                                         .value = 0x00,
 530                                         .gain = IIO_G_TO_M_S_2(49000),
 531                                 },
 532                                 [1] = {
 533                                         .num = ST_ACCEL_FS_AVL_200G,
 534                                         .value = 0x01,
 535                                         .gain = IIO_G_TO_M_S_2(98000),
 536                                 },
 537                                 [2] = {
 538                                         .num = ST_ACCEL_FS_AVL_400G,
 539                                         .value = 0x03,
 540                                         .gain = IIO_G_TO_M_S_2(195000),
 541                                 },
 542                         },
 543                 },
 544                 .bdu = {
 545                         .addr = 0x23,
 546                         .mask = 0x80,
 547                 },
 548                 .drdy_irq = {
 549                         .int1 = {
 550                                 .addr = 0x22,
 551                                 .mask = 0x02,
 552                         },
 553                         .int2 = {
 554                                 .addr = 0x22,
 555                                 .mask = 0x10,
 556                         },
 557                         .addr_ihl = 0x22,
 558                         .mask_ihl = 0x80,
 559                 },
 560                 .sim = {
 561                         .addr = 0x23,
 562                         .value = BIT(0),
 563                 },
 564                 .multi_read_bit = true,
 565                 .bootime = 2,
 566         },
 567         {
 568                 /* No WAI register present */
 569                 .sensors_supported = {
 570                         [0] = LIS3L02DQ_ACCEL_DEV_NAME,
 571                 },
 572                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 573                 .odr = {
 574                         .addr = 0x20,
 575                         .mask = 0x30,
 576                         .odr_avl = {
 577                                 { .hz = 280, .value = 0x00, },
 578                                 { .hz = 560, .value = 0x01, },
 579                                 { .hz = 1120, .value = 0x02, },
 580                                 { .hz = 4480, .value = 0x03, },
 581                         },
 582                 },
 583                 .pw = {
 584                         .addr = 0x20,
 585                         .mask = 0xc0,
 586                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 587                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 588                 },
 589                 .enable_axis = {
 590                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 591                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 592                 },
 593                 .fs = {
 594                         .fs_avl = {
 595                                 [0] = {
 596                                         .num = ST_ACCEL_FS_AVL_2G,
 597                                         .gain = IIO_G_TO_M_S_2(488),
 598                                 },
 599                         },
 600                 },
 601                 /*
 602                  * The part has a BDU bit but if set the data is never
 603                  * updated so don't set it.
 604                  */
 605                 .bdu = {
 606                 },
 607                 .drdy_irq = {
 608                         .int1 = {
 609                                 .addr = 0x21,
 610                                 .mask = 0x04,
 611                         },
 612                         .stat_drdy = {
 613                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 614                                 .mask = 0x07,
 615                         },
 616                 },
 617                 .sim = {
 618                         .addr = 0x21,
 619                         .value = BIT(1),
 620                 },
 621                 .multi_read_bit = false,
 622                 .bootime = 2,
 623         },
 624         {
 625                 .wai = 0x33,
 626                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 627                 .sensors_supported = {
 628                         [0] = LNG2DM_ACCEL_DEV_NAME,
 629                 },
 630                 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
 631                 .odr = {
 632                         .addr = 0x20,
 633                         .mask = 0xf0,
 634                         .odr_avl = {
 635                                 { .hz = 1, .value = 0x01, },
 636                                 { .hz = 10, .value = 0x02, },
 637                                 { .hz = 25, .value = 0x03, },
 638                                 { .hz = 50, .value = 0x04, },
 639                                 { .hz = 100, .value = 0x05, },
 640                                 { .hz = 200, .value = 0x06, },
 641                                 { .hz = 400, .value = 0x07, },
 642                                 { .hz = 1600, .value = 0x08, },
 643                         },
 644                 },
 645                 .pw = {
 646                         .addr = 0x20,
 647                         .mask = 0xf0,
 648                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 649                 },
 650                 .enable_axis = {
 651                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 652                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 653                 },
 654                 .fs = {
 655                         .addr = 0x23,
 656                         .mask = 0x30,
 657                         .fs_avl = {
 658                                 [0] = {
 659                                         .num = ST_ACCEL_FS_AVL_2G,
 660                                         .value = 0x00,
 661                                         .gain = IIO_G_TO_M_S_2(15600),
 662                                 },
 663                                 [1] = {
 664                                         .num = ST_ACCEL_FS_AVL_4G,
 665                                         .value = 0x01,
 666                                         .gain = IIO_G_TO_M_S_2(31200),
 667                                 },
 668                                 [2] = {
 669                                         .num = ST_ACCEL_FS_AVL_8G,
 670                                         .value = 0x02,
 671                                         .gain = IIO_G_TO_M_S_2(62500),
 672                                 },
 673                                 [3] = {
 674                                         .num = ST_ACCEL_FS_AVL_16G,
 675                                         .value = 0x03,
 676                                         .gain = IIO_G_TO_M_S_2(187500),
 677                                 },
 678                         },
 679                 },
 680                 .drdy_irq = {
 681                         .int1 = {
 682                                 .addr = 0x22,
 683                                 .mask = 0x10,
 684                         },
 685                         .addr_ihl = 0x25,
 686                         .mask_ihl = 0x02,
 687                         .stat_drdy = {
 688                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 689                                 .mask = 0x07,
 690                         },
 691                 },
 692                 .sim = {
 693                         .addr = 0x23,
 694                         .value = BIT(0),
 695                 },
 696                 .multi_read_bit = true,
 697                 .bootime = 2,
 698         },
 699         {
 700                 .wai = 0x44,
 701                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 702                 .sensors_supported = {
 703                         [0] = LIS2DW12_ACCEL_DEV_NAME,
 704                 },
 705                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 706                 .odr = {
 707                         .addr = 0x20,
 708                         .mask = 0xf0,
 709                         .odr_avl = {
 710                                 { .hz = 1, .value = 0x01, },
 711                                 { .hz = 12, .value = 0x02, },
 712                                 { .hz = 25, .value = 0x03, },
 713                                 { .hz = 50, .value = 0x04, },
 714                                 { .hz = 100, .value = 0x05, },
 715                                 { .hz = 200, .value = 0x06, },
 716                         },
 717                 },
 718                 .pw = {
 719                         .addr = 0x20,
 720                         .mask = 0xf0,
 721                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 722                 },
 723                 .fs = {
 724                         .addr = 0x25,
 725                         .mask = 0x30,
 726                         .fs_avl = {
 727                                 [0] = {
 728                                         .num = ST_ACCEL_FS_AVL_2G,
 729                                         .value = 0x00,
 730                                         .gain = IIO_G_TO_M_S_2(976),
 731                                 },
 732                                 [1] = {
 733                                         .num = ST_ACCEL_FS_AVL_4G,
 734                                         .value = 0x01,
 735                                         .gain = IIO_G_TO_M_S_2(1952),
 736                                 },
 737                                 [2] = {
 738                                         .num = ST_ACCEL_FS_AVL_8G,
 739                                         .value = 0x02,
 740                                         .gain = IIO_G_TO_M_S_2(3904),
 741                                 },
 742                                 [3] = {
 743                                         .num = ST_ACCEL_FS_AVL_16G,
 744                                         .value = 0x03,
 745                                         .gain = IIO_G_TO_M_S_2(7808),
 746                                 },
 747                         },
 748                 },
 749                 .bdu = {
 750                         .addr = 0x21,
 751                         .mask = 0x08,
 752                 },
 753                 .drdy_irq = {
 754                         .int1 = {
 755                                 .addr = 0x23,
 756                                 .mask = 0x01,
 757                                 .addr_od = 0x22,
 758                                 .mask_od = 0x20,
 759                         },
 760                         .int2 = {
 761                                 .addr = 0x24,
 762                                 .mask = 0x01,
 763                                 .addr_od = 0x22,
 764                                 .mask_od = 0x20,
 765                         },
 766                         .addr_ihl = 0x22,
 767                         .mask_ihl = 0x08,
 768                         .stat_drdy = {
 769                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 770                                 .mask = 0x01,
 771                         },
 772                 },
 773                 .sim = {
 774                         .addr = 0x21,
 775                         .value = BIT(0),
 776                 },
 777                 .multi_read_bit = false,
 778                 .bootime = 2,
 779         },
 780         {
 781                 .wai = 0x11,
 782                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 783                 .sensors_supported = {
 784                         [0] = LIS3DHH_ACCEL_DEV_NAME,
 785                 },
 786                 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
 787                 .odr = {
 788                         /* just ODR = 1100Hz available */
 789                         .odr_avl = {
 790                                 { .hz = 1100, .value = 0x00, },
 791                         },
 792                 },
 793                 .pw = {
 794                         .addr = 0x20,
 795                         .mask = 0x80,
 796                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 797                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 798                 },
 799                 .fs = {
 800                         .fs_avl = {
 801                                 [0] = {
 802                                         .num = ST_ACCEL_FS_AVL_2G,
 803                                         .gain = IIO_G_TO_M_S_2(76),
 804                                 },
 805                         },
 806                 },
 807                 .bdu = {
 808                         .addr = 0x20,
 809                         .mask = 0x01,
 810                 },
 811                 .drdy_irq = {
 812                         .int1 = {
 813                                 .addr = 0x21,
 814                                 .mask = 0x80,
 815                                 .addr_od = 0x23,
 816                                 .mask_od = 0x04,
 817                         },
 818                         .int2 = {
 819                                 .addr = 0x22,
 820                                 .mask = 0x80,
 821                                 .addr_od = 0x23,
 822                                 .mask_od = 0x08,
 823                         },
 824                         .stat_drdy = {
 825                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 826                                 .mask = 0x07,
 827                         },
 828                 },
 829                 .multi_read_bit = false,
 830                 .bootime = 2,
 831         },
 832 };
 833
 834 static int st_accel_read_raw(struct iio_dev *indio_dev,
 835                         struct iio_chan_spec const *ch, int *val,
 836                                                         int *val2, long mask)
 837 {
 838         int err;
 839         struct st_sensor_data *adata = iio_priv(indio_dev);
 840
 841         switch (mask) {
 842         case IIO_CHAN_INFO_RAW:
 843                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 844                 if (err < 0)
 845                         goto read_error;
 846
 847                 return IIO_VAL_INT;
 848         case IIO_CHAN_INFO_SCALE:
 849                 *val = adata->current_fullscale->gain / 1000000;
 850                 *val2 = adata->current_fullscale->gain % 1000000;
 851                 return IIO_VAL_INT_PLUS_MICRO;
 852         case IIO_CHAN_INFO_SAMP_FREQ:
 853                 *val = adata->odr;
 854                 return IIO_VAL_INT;
 855         default:
 856                 return -EINVAL;
 857         }
 858
 859 read_error:
 860         return err;
 861 }
 862
 863 static int st_accel_write_raw(struct iio_dev *indio_dev,
 864                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 865 {
 866         int err;
 867
 868         switch (mask) {
 869         case IIO_CHAN_INFO_SCALE: {
 870                 int gain;
 871
 872                 gain = val * 1000000 + val2;
 873                 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
 874                 break;
 875         }
 876         case IIO_CHAN_INFO_SAMP_FREQ:
 877                 if (val2)
 878                         return -EINVAL;
 879                 mutex_lock(&indio_dev->mlock);
 880                 err = st_sensors_set_odr(indio_dev, val);
 881                 mutex_unlock(&indio_dev->mlock);
 882                 return err;
 883         default:
 884                 return -EINVAL;
 885         }
 886
 887         return err;
 888 }
 889
 890 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 891 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
 892
 893 static struct attribute *st_accel_attributes[] = {
 894         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 895         &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
 896         NULL,
 897 };
 898
 899 static const struct attribute_group st_accel_attribute_group = {
 900         .attrs = st_accel_attributes,
 901 };
 902
 903 static const struct iio_info accel_info = {
 904         .attrs = &st_accel_attribute_group,
 905         .read_raw = &st_accel_read_raw,
 906         .write_raw = &st_accel_write_raw,
 907         .debugfs_reg_access = &st_sensors_debugfs_reg_access,
 908 };
 909
 910 #ifdef CONFIG_IIO_TRIGGER
 911 static const struct iio_trigger_ops st_accel_trigger_ops = {
 912         .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
 913         .validate_device = st_sensors_validate_device,
 914 };
 915 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
 916 #else
 917 #define ST_ACCEL_TRIGGER_OPS NULL
 918 #endif
 919
 920 int st_accel_common_probe(struct iio_dev *indio_dev)
 921 {
 922         struct st_sensor_data *adata = iio_priv(indio_dev);
 923         struct st_sensors_platform_data *pdata =
 924                 (struct st_sensors_platform_data *)adata->dev->platform_data;
 925         int irq = adata->get_irq_data_ready(indio_dev);
 926         int err;
 927
 928         indio_dev->modes = INDIO_DIRECT_MODE;
 929         indio_dev->info = &accel_info;
 930         mutex_init(&adata->tb.buf_lock);
 931
 932         err = st_sensors_power_enable(indio_dev);
 933         if (err)
 934                 return err;
 935
 936         err = st_sensors_check_device_support(indio_dev,
 937                                         ARRAY_SIZE(st_accel_sensors_settings),
 938                                         st_accel_sensors_settings);
 939         if (err < 0)
 940                 goto st_accel_power_off;
 941
 942         adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
 943         adata->multiread_bit = adata->sensor_settings->multi_read_bit;
 944         indio_dev->channels = adata->sensor_settings->ch;
 945         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
 946
 947         adata->current_fullscale = (struct st_sensor_fullscale_avl *)
 948                                         &adata->sensor_settings->fs.fs_avl[0];
 949         adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
 950
 951         if (!pdata)
 952                 pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
 953
 954         err = st_sensors_init_sensor(indio_dev, pdata);
 955         if (err < 0)
 956                 goto st_accel_power_off;
 957
 958         err = st_accel_allocate_ring(indio_dev);
 959         if (err < 0)
 960                 goto st_accel_power_off;
 961
 962         if (irq > 0) {
 963                 err = st_sensors_allocate_trigger(indio_dev,
 964                                                  ST_ACCEL_TRIGGER_OPS);
 965                 if (err < 0)
 966                         goto st_accel_probe_trigger_error;
 967         }
 968
 969         err = iio_device_register(indio_dev);
 970         if (err)
 971                 goto st_accel_device_register_error;
 972
 973         dev_info(&indio_dev->dev, "registered accelerometer %s\n",
 974                  indio_dev->name);
 975
 976         return 0;
 977
 978 st_accel_device_register_error:
 979         if (irq > 0)
 980                 st_sensors_deallocate_trigger(indio_dev);
 981 st_accel_probe_trigger_error:
 982         st_accel_deallocate_ring(indio_dev);
 983 st_accel_power_off:
 984         st_sensors_power_disable(indio_dev);
 985
 986         return err;
 987 }
 988 EXPORT_SYMBOL(st_accel_common_probe);
 989
 990 void st_accel_common_remove(struct iio_dev *indio_dev)
 991 {
 992         struct st_sensor_data *adata = iio_priv(indio_dev);
 993
 994         st_sensors_power_disable(indio_dev);
 995
 996         iio_device_unregister(indio_dev);
 997         if (adata->get_irq_data_ready(indio_dev) > 0)
 998                 st_sensors_deallocate_trigger(indio_dev);
 999
1000         st_accel_deallocate_ring(indio_dev);
1001 }
1002 EXPORT_SYMBOL(st_accel_common_remove);
1003
1004 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
1005 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
1006 MODULE_LICENSE("GPL v2");