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 43 /* CUSTOM VALUES FOR SENSOR 1 */ 44 #define ST_ACCEL_1_WAI_EXP 0x33 45 #define ST_ACCEL_1_ODR_ADDR 0x20 46 #define ST_ACCEL_1_ODR_MASK 0xf0 47 #define ST_ACCEL_1_ODR_AVL_1HZ_VAL 0x01 48 #define ST_ACCEL_1_ODR_AVL_10HZ_VAL 0x02 49 #define ST_ACCEL_1_ODR_AVL_25HZ_VAL 0x03 50 #define ST_ACCEL_1_ODR_AVL_50HZ_VAL 0x04 51 #define ST_ACCEL_1_ODR_AVL_100HZ_VAL 0x05 52 #define ST_ACCEL_1_ODR_AVL_200HZ_VAL 0x06 53 #define ST_ACCEL_1_ODR_AVL_400HZ_VAL 0x07 54 #define ST_ACCEL_1_ODR_AVL_1600HZ_VAL 0x08 55 #define ST_ACCEL_1_FS_ADDR 0x23 56 #define ST_ACCEL_1_FS_MASK 0x30 57 #define ST_ACCEL_1_FS_AVL_2_VAL 0x00 58 #define ST_ACCEL_1_FS_AVL_4_VAL 0x01 59 #define ST_ACCEL_1_FS_AVL_8_VAL 0x02 60 #define ST_ACCEL_1_FS_AVL_16_VAL 0x03 61 #define ST_ACCEL_1_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000) 62 #define ST_ACCEL_1_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000) 63 #define ST_ACCEL_1_FS_AVL_8_GAIN IIO_G_TO_M_S_2(4000) 64 #define ST_ACCEL_1_FS_AVL_16_GAIN IIO_G_TO_M_S_2(12000) 65 #define ST_ACCEL_1_BDU_ADDR 0x23 66 #define ST_ACCEL_1_BDU_MASK 0x80 67 #define ST_ACCEL_1_DRDY_IRQ_ADDR 0x22 68 #define ST_ACCEL_1_DRDY_IRQ_INT1_MASK 0x10 69 #define ST_ACCEL_1_DRDY_IRQ_INT2_MASK 0x08 70 #define ST_ACCEL_1_MULTIREAD_BIT true 71 72 /* CUSTOM VALUES FOR SENSOR 2 */ 73 #define ST_ACCEL_2_WAI_EXP 0x32 74 #define ST_ACCEL_2_ODR_ADDR 0x20 75 #define ST_ACCEL_2_ODR_MASK 0x18 76 #define ST_ACCEL_2_ODR_AVL_50HZ_VAL 0x00 77 #define ST_ACCEL_2_ODR_AVL_100HZ_VAL 0x01 78 #define ST_ACCEL_2_ODR_AVL_400HZ_VAL 0x02 79 #define ST_ACCEL_2_ODR_AVL_1000HZ_VAL 0x03 80 #define ST_ACCEL_2_PW_ADDR 0x20 81 #define ST_ACCEL_2_PW_MASK 0xe0 82 #define ST_ACCEL_2_FS_ADDR 0x23 83 #define ST_ACCEL_2_FS_MASK 0x30 84 #define ST_ACCEL_2_FS_AVL_2_VAL 0X00 85 #define ST_ACCEL_2_FS_AVL_4_VAL 0X01 86 #define ST_ACCEL_2_FS_AVL_8_VAL 0x03 87 #define ST_ACCEL_2_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000) 88 #define ST_ACCEL_2_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000) 89 #define ST_ACCEL_2_FS_AVL_8_GAIN IIO_G_TO_M_S_2(3900) 90 #define ST_ACCEL_2_BDU_ADDR 0x23 91 #define ST_ACCEL_2_BDU_MASK 0x80 92 #define ST_ACCEL_2_DRDY_IRQ_ADDR 0x22 93 #define ST_ACCEL_2_DRDY_IRQ_INT1_MASK 0x02 94 #define ST_ACCEL_2_DRDY_IRQ_INT2_MASK 0x10 95 #define ST_ACCEL_2_MULTIREAD_BIT true 96 97 /* CUSTOM VALUES FOR SENSOR 3 */ 98 #define ST_ACCEL_3_WAI_EXP 0x40 99 #define ST_ACCEL_3_ODR_ADDR 0x20 100 #define ST_ACCEL_3_ODR_MASK 0xf0 101 #define ST_ACCEL_3_ODR_AVL_3HZ_VAL 0x01 102 #define ST_ACCEL_3_ODR_AVL_6HZ_VAL 0x02 103 #define ST_ACCEL_3_ODR_AVL_12HZ_VAL 0x03 104 #define ST_ACCEL_3_ODR_AVL_25HZ_VAL 0x04 105 #define ST_ACCEL_3_ODR_AVL_50HZ_VAL 0x05 106 #define ST_ACCEL_3_ODR_AVL_100HZ_VAL 0x06 107 #define ST_ACCEL_3_ODR_AVL_200HZ_VAL 0x07 108 #define ST_ACCEL_3_ODR_AVL_400HZ_VAL 0x08 109 #define ST_ACCEL_3_ODR_AVL_800HZ_VAL 0x09 110 #define ST_ACCEL_3_ODR_AVL_1600HZ_VAL 0x0a 111 #define ST_ACCEL_3_FS_ADDR 0x24 112 #define ST_ACCEL_3_FS_MASK 0x38 113 #define ST_ACCEL_3_FS_AVL_2_VAL 0X00 114 #define ST_ACCEL_3_FS_AVL_4_VAL 0X01 115 #define ST_ACCEL_3_FS_AVL_6_VAL 0x02 116 #define ST_ACCEL_3_FS_AVL_8_VAL 0x03 117 #define ST_ACCEL_3_FS_AVL_16_VAL 0x04 118 #define ST_ACCEL_3_FS_AVL_2_GAIN IIO_G_TO_M_S_2(61) 119 #define ST_ACCEL_3_FS_AVL_4_GAIN IIO_G_TO_M_S_2(122) 120 #define ST_ACCEL_3_FS_AVL_6_GAIN IIO_G_TO_M_S_2(183) 121 #define ST_ACCEL_3_FS_AVL_8_GAIN IIO_G_TO_M_S_2(244) 122 #define ST_ACCEL_3_FS_AVL_16_GAIN IIO_G_TO_M_S_2(732) 123 #define ST_ACCEL_3_BDU_ADDR 0x20 124 #define ST_ACCEL_3_BDU_MASK 0x08 125 #define ST_ACCEL_3_DRDY_IRQ_ADDR 0x23 126 #define ST_ACCEL_3_DRDY_IRQ_INT1_MASK 0x80 127 #define ST_ACCEL_3_DRDY_IRQ_INT2_MASK 0x00 128 #define ST_ACCEL_3_IG1_EN_ADDR 0x23 129 #define ST_ACCEL_3_IG1_EN_MASK 0x08 130 #define ST_ACCEL_3_MULTIREAD_BIT false 131 132 /* CUSTOM VALUES FOR SENSOR 4 */ 133 #define ST_ACCEL_4_WAI_EXP 0x3a 134 #define ST_ACCEL_4_ODR_ADDR 0x20 135 #define ST_ACCEL_4_ODR_MASK 0x30 /* DF1 and DF0 */ 136 #define ST_ACCEL_4_ODR_AVL_40HZ_VAL 0x00 137 #define ST_ACCEL_4_ODR_AVL_160HZ_VAL 0x01 138 #define ST_ACCEL_4_ODR_AVL_640HZ_VAL 0x02 139 #define ST_ACCEL_4_ODR_AVL_2560HZ_VAL 0x03 140 #define ST_ACCEL_4_PW_ADDR 0x20 141 #define ST_ACCEL_4_PW_MASK 0xc0 142 #define ST_ACCEL_4_FS_ADDR 0x21 143 #define ST_ACCEL_4_FS_MASK 0x80 144 #define ST_ACCEL_4_FS_AVL_2_VAL 0X00 145 #define ST_ACCEL_4_FS_AVL_6_VAL 0X01 146 #define ST_ACCEL_4_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1024) 147 #define ST_ACCEL_4_FS_AVL_6_GAIN IIO_G_TO_M_S_2(340) 148 #define ST_ACCEL_4_BDU_ADDR 0x21 149 #define ST_ACCEL_4_BDU_MASK 0x40 150 #define ST_ACCEL_4_DRDY_IRQ_ADDR 0x21 151 #define ST_ACCEL_4_DRDY_IRQ_INT1_MASK 0x04 152 #define ST_ACCEL_4_IG1_EN_ADDR 0x21 153 #define ST_ACCEL_4_IG1_EN_MASK 0x08 154 #define ST_ACCEL_4_MULTIREAD_BIT true 155 156 static const struct iio_chan_spec st_accel_12bit_channels[] = { 157 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 158 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 159 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16, 160 ST_ACCEL_DEFAULT_OUT_X_L_ADDR), 161 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 162 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 163 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16, 164 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), 165 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 166 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 167 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16, 168 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), 169 IIO_CHAN_SOFT_TIMESTAMP(3) 170 }; 171 172 static const struct iio_chan_spec st_accel_16bit_channels[] = { 173 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 174 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 175 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16, 176 ST_ACCEL_DEFAULT_OUT_X_L_ADDR), 177 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 178 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 179 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16, 180 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), 181 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, 182 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), 183 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16, 184 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), 185 IIO_CHAN_SOFT_TIMESTAMP(3) 186 }; 187 188 static const struct st_sensor_settings st_accel_sensors_settings[] = { 189 { 190 .wai = ST_ACCEL_1_WAI_EXP, 191 .sensors_supported = { 192 [0] = LIS3DH_ACCEL_DEV_NAME, 193 [1] = LSM303DLHC_ACCEL_DEV_NAME, 194 [2] = LSM330D_ACCEL_DEV_NAME, 195 [3] = LSM330DL_ACCEL_DEV_NAME, 196 [4] = LSM330DLC_ACCEL_DEV_NAME, 197 }, 198 .ch = (struct iio_chan_spec *)st_accel_12bit_channels, 199 .odr = { 200 .addr = ST_ACCEL_1_ODR_ADDR, 201 .mask = ST_ACCEL_1_ODR_MASK, 202 .odr_avl = { 203 { 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, }, 204 { 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, }, 205 { 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, }, 206 { 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, }, 207 { 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, }, 208 { 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, }, 209 { 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, }, 210 { 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, }, 211 }, 212 }, 213 .pw = { 214 .addr = ST_ACCEL_1_ODR_ADDR, 215 .mask = ST_ACCEL_1_ODR_MASK, 216 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, 217 }, 218 .enable_axis = { 219 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, 220 .mask = ST_SENSORS_DEFAULT_AXIS_MASK, 221 }, 222 .fs = { 223 .addr = ST_ACCEL_1_FS_ADDR, 224 .mask = ST_ACCEL_1_FS_MASK, 225 .fs_avl = { 226 [0] = { 227 .num = ST_ACCEL_FS_AVL_2G, 228 .value = ST_ACCEL_1_FS_AVL_2_VAL, 229 .gain = ST_ACCEL_1_FS_AVL_2_GAIN, 230 }, 231 [1] = { 232 .num = ST_ACCEL_FS_AVL_4G, 233 .value = ST_ACCEL_1_FS_AVL_4_VAL, 234 .gain = ST_ACCEL_1_FS_AVL_4_GAIN, 235 }, 236 [2] = { 237 .num = ST_ACCEL_FS_AVL_8G, 238 .value = ST_ACCEL_1_FS_AVL_8_VAL, 239 .gain = ST_ACCEL_1_FS_AVL_8_GAIN, 240 }, 241 [3] = { 242 .num = ST_ACCEL_FS_AVL_16G, 243 .value = ST_ACCEL_1_FS_AVL_16_VAL, 244 .gain = ST_ACCEL_1_FS_AVL_16_GAIN, 245 }, 246 }, 247 }, 248 .bdu = { 249 .addr = ST_ACCEL_1_BDU_ADDR, 250 .mask = ST_ACCEL_1_BDU_MASK, 251 }, 252 .drdy_irq = { 253 .addr = ST_ACCEL_1_DRDY_IRQ_ADDR, 254 .mask_int1 = ST_ACCEL_1_DRDY_IRQ_INT1_MASK, 255 .mask_int2 = ST_ACCEL_1_DRDY_IRQ_INT2_MASK, 256 }, 257 .multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT, 258 .bootime = 2, 259 }, 260 { 261 .wai = ST_ACCEL_2_WAI_EXP, 262 .sensors_supported = { 263 [0] = LIS331DLH_ACCEL_DEV_NAME, 264 [1] = LSM303DL_ACCEL_DEV_NAME, 265 [2] = LSM303DLH_ACCEL_DEV_NAME, 266 [3] = LSM303DLM_ACCEL_DEV_NAME, 267 }, 268 .ch = (struct iio_chan_spec *)st_accel_12bit_channels, 269 .odr = { 270 .addr = ST_ACCEL_2_ODR_ADDR, 271 .mask = ST_ACCEL_2_ODR_MASK, 272 .odr_avl = { 273 { 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, }, 274 { 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, }, 275 { 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, }, 276 { 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, }, 277 }, 278 }, 279 .pw = { 280 .addr = ST_ACCEL_2_PW_ADDR, 281 .mask = ST_ACCEL_2_PW_MASK, 282 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, 283 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, 284 }, 285 .enable_axis = { 286 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, 287 .mask = ST_SENSORS_DEFAULT_AXIS_MASK, 288 }, 289 .fs = { 290 .addr = ST_ACCEL_2_FS_ADDR, 291 .mask = ST_ACCEL_2_FS_MASK, 292 .fs_avl = { 293 [0] = { 294 .num = ST_ACCEL_FS_AVL_2G, 295 .value = ST_ACCEL_2_FS_AVL_2_VAL, 296 .gain = ST_ACCEL_2_FS_AVL_2_GAIN, 297 }, 298 [1] = { 299 .num = ST_ACCEL_FS_AVL_4G, 300 .value = ST_ACCEL_2_FS_AVL_4_VAL, 301 .gain = ST_ACCEL_2_FS_AVL_4_GAIN, 302 }, 303 [2] = { 304 .num = ST_ACCEL_FS_AVL_8G, 305 .value = ST_ACCEL_2_FS_AVL_8_VAL, 306 .gain = ST_ACCEL_2_FS_AVL_8_GAIN, 307 }, 308 }, 309 }, 310 .bdu = { 311 .addr = ST_ACCEL_2_BDU_ADDR, 312 .mask = ST_ACCEL_2_BDU_MASK, 313 }, 314 .drdy_irq = { 315 .addr = ST_ACCEL_2_DRDY_IRQ_ADDR, 316 .mask_int1 = ST_ACCEL_2_DRDY_IRQ_INT1_MASK, 317 .mask_int2 = ST_ACCEL_2_DRDY_IRQ_INT2_MASK, 318 }, 319 .multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT, 320 .bootime = 2, 321 }, 322 { 323 .wai = ST_ACCEL_3_WAI_EXP, 324 .sensors_supported = { 325 [0] = LSM330_ACCEL_DEV_NAME, 326 }, 327 .ch = (struct iio_chan_spec *)st_accel_16bit_channels, 328 .odr = { 329 .addr = ST_ACCEL_3_ODR_ADDR, 330 .mask = ST_ACCEL_3_ODR_MASK, 331 .odr_avl = { 332 { 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL }, 333 { 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, }, 334 { 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, }, 335 { 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, }, 336 { 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, }, 337 { 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, }, 338 { 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, }, 339 { 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, }, 340 { 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, }, 341 { 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, }, 342 }, 343 }, 344 .pw = { 345 .addr = ST_ACCEL_3_ODR_ADDR, 346 .mask = ST_ACCEL_3_ODR_MASK, 347 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, 348 }, 349 .enable_axis = { 350 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, 351 .mask = ST_SENSORS_DEFAULT_AXIS_MASK, 352 }, 353 .fs = { 354 .addr = ST_ACCEL_3_FS_ADDR, 355 .mask = ST_ACCEL_3_FS_MASK, 356 .fs_avl = { 357 [0] = { 358 .num = ST_ACCEL_FS_AVL_2G, 359 .value = ST_ACCEL_3_FS_AVL_2_VAL, 360 .gain = ST_ACCEL_3_FS_AVL_2_GAIN, 361 }, 362 [1] = { 363 .num = ST_ACCEL_FS_AVL_4G, 364 .value = ST_ACCEL_3_FS_AVL_4_VAL, 365 .gain = ST_ACCEL_3_FS_AVL_4_GAIN, 366 }, 367 [2] = { 368 .num = ST_ACCEL_FS_AVL_6G, 369 .value = ST_ACCEL_3_FS_AVL_6_VAL, 370 .gain = ST_ACCEL_3_FS_AVL_6_GAIN, 371 }, 372 [3] = { 373 .num = ST_ACCEL_FS_AVL_8G, 374 .value = ST_ACCEL_3_FS_AVL_8_VAL, 375 .gain = ST_ACCEL_3_FS_AVL_8_GAIN, 376 }, 377 [4] = { 378 .num = ST_ACCEL_FS_AVL_16G, 379 .value = ST_ACCEL_3_FS_AVL_16_VAL, 380 .gain = ST_ACCEL_3_FS_AVL_16_GAIN, 381 }, 382 }, 383 }, 384 .bdu = { 385 .addr = ST_ACCEL_3_BDU_ADDR, 386 .mask = ST_ACCEL_3_BDU_MASK, 387 }, 388 .drdy_irq = { 389 .addr = ST_ACCEL_3_DRDY_IRQ_ADDR, 390 .mask_int1 = ST_ACCEL_3_DRDY_IRQ_INT1_MASK, 391 .mask_int2 = ST_ACCEL_3_DRDY_IRQ_INT2_MASK, 392 .ig1 = { 393 .en_addr = ST_ACCEL_3_IG1_EN_ADDR, 394 .en_mask = ST_ACCEL_3_IG1_EN_MASK, 395 }, 396 }, 397 .multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT, 398 .bootime = 2, 399 }, 400 { 401 .wai = ST_ACCEL_4_WAI_EXP, 402 .sensors_supported = { 403 [0] = LIS3LV02DL_ACCEL_DEV_NAME, 404 }, 405 .ch = (struct iio_chan_spec *)st_accel_12bit_channels, 406 .odr = { 407 .addr = ST_ACCEL_4_ODR_ADDR, 408 .mask = ST_ACCEL_4_ODR_MASK, 409 .odr_avl = { 410 { 40, ST_ACCEL_4_ODR_AVL_40HZ_VAL }, 411 { 160, ST_ACCEL_4_ODR_AVL_160HZ_VAL, }, 412 { 640, ST_ACCEL_4_ODR_AVL_640HZ_VAL, }, 413 { 2560, ST_ACCEL_4_ODR_AVL_2560HZ_VAL, }, 414 }, 415 }, 416 .pw = { 417 .addr = ST_ACCEL_4_PW_ADDR, 418 .mask = ST_ACCEL_4_PW_MASK, 419 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, 420 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, 421 }, 422 .enable_axis = { 423 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, 424 .mask = ST_SENSORS_DEFAULT_AXIS_MASK, 425 }, 426 .fs = { 427 .addr = ST_ACCEL_4_FS_ADDR, 428 .mask = ST_ACCEL_4_FS_MASK, 429 .fs_avl = { 430 [0] = { 431 .num = ST_ACCEL_FS_AVL_2G, 432 .value = ST_ACCEL_4_FS_AVL_2_VAL, 433 .gain = ST_ACCEL_4_FS_AVL_2_GAIN, 434 }, 435 [1] = { 436 .num = ST_ACCEL_FS_AVL_6G, 437 .value = ST_ACCEL_4_FS_AVL_6_VAL, 438 .gain = ST_ACCEL_4_FS_AVL_6_GAIN, 439 }, 440 }, 441 }, 442 .bdu = { 443 .addr = ST_ACCEL_4_BDU_ADDR, 444 .mask = ST_ACCEL_4_BDU_MASK, 445 }, 446 .drdy_irq = { 447 .addr = ST_ACCEL_4_DRDY_IRQ_ADDR, 448 .mask_int1 = ST_ACCEL_4_DRDY_IRQ_INT1_MASK, 449 .ig1 = { 450 .en_addr = ST_ACCEL_4_IG1_EN_ADDR, 451 .en_mask = ST_ACCEL_4_IG1_EN_MASK, 452 }, 453 }, 454 .multi_read_bit = ST_ACCEL_4_MULTIREAD_BIT, 455 .bootime = 2, /* guess */ 456 }, 457 }; 458 459 static int st_accel_read_raw(struct iio_dev *indio_dev, 460 struct iio_chan_spec const *ch, int *val, 461 int *val2, long mask) 462 { 463 int err; 464 struct st_sensor_data *adata = iio_priv(indio_dev); 465 466 switch (mask) { 467 case IIO_CHAN_INFO_RAW: 468 err = st_sensors_read_info_raw(indio_dev, ch, val); 469 if (err < 0) 470 goto read_error; 471 472 return IIO_VAL_INT; 473 case IIO_CHAN_INFO_SCALE: 474 *val = 0; 475 *val2 = adata->current_fullscale->gain; 476 return IIO_VAL_INT_PLUS_MICRO; 477 case IIO_CHAN_INFO_SAMP_FREQ: 478 *val = adata->odr; 479 return IIO_VAL_INT; 480 default: 481 return -EINVAL; 482 } 483 484 read_error: 485 return err; 486 } 487 488 static int st_accel_write_raw(struct iio_dev *indio_dev, 489 struct iio_chan_spec const *chan, int val, int val2, long mask) 490 { 491 int err; 492 493 switch (mask) { 494 case IIO_CHAN_INFO_SCALE: 495 err = st_sensors_set_fullscale_by_gain(indio_dev, val2); 496 break; 497 case IIO_CHAN_INFO_SAMP_FREQ: 498 if (val2) 499 return -EINVAL; 500 mutex_lock(&indio_dev->mlock); 501 err = st_sensors_set_odr(indio_dev, val); 502 mutex_unlock(&indio_dev->mlock); 503 return err; 504 default: 505 return -EINVAL; 506 } 507 508 return err; 509 } 510 511 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); 512 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available); 513 514 static struct attribute *st_accel_attributes[] = { 515 &iio_dev_attr_sampling_frequency_available.dev_attr.attr, 516 &iio_dev_attr_in_accel_scale_available.dev_attr.attr, 517 NULL, 518 }; 519 520 static const struct attribute_group st_accel_attribute_group = { 521 .attrs = st_accel_attributes, 522 }; 523 524 static const struct iio_info accel_info = { 525 .driver_module = THIS_MODULE, 526 .attrs = &st_accel_attribute_group, 527 .read_raw = &st_accel_read_raw, 528 .write_raw = &st_accel_write_raw, 529 }; 530 531 #ifdef CONFIG_IIO_TRIGGER 532 static const struct iio_trigger_ops st_accel_trigger_ops = { 533 .owner = THIS_MODULE, 534 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE, 535 }; 536 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops) 537 #else 538 #define ST_ACCEL_TRIGGER_OPS NULL 539 #endif 540 541 int st_accel_common_probe(struct iio_dev *indio_dev) 542 { 543 struct st_sensor_data *adata = iio_priv(indio_dev); 544 int irq = adata->get_irq_data_ready(indio_dev); 545 int err; 546 547 indio_dev->modes = INDIO_DIRECT_MODE; 548 indio_dev->info = &accel_info; 549 mutex_init(&adata->tb.buf_lock); 550 551 st_sensors_power_enable(indio_dev); 552 553 err = st_sensors_check_device_support(indio_dev, 554 ARRAY_SIZE(st_accel_sensors_settings), 555 st_accel_sensors_settings); 556 if (err < 0) 557 return err; 558 559 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; 560 adata->multiread_bit = adata->sensor_settings->multi_read_bit; 561 indio_dev->channels = adata->sensor_settings->ch; 562 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; 563 564 adata->current_fullscale = (struct st_sensor_fullscale_avl *) 565 &adata->sensor_settings->fs.fs_avl[0]; 566 adata->odr = adata->sensor_settings->odr.odr_avl[0].hz; 567 568 if (!adata->dev->platform_data) 569 adata->dev->platform_data = 570 (struct st_sensors_platform_data *)&default_accel_pdata; 571 572 err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data); 573 if (err < 0) 574 return err; 575 576 err = st_accel_allocate_ring(indio_dev); 577 if (err < 0) 578 return err; 579 580 if (irq > 0) { 581 err = st_sensors_allocate_trigger(indio_dev, 582 ST_ACCEL_TRIGGER_OPS); 583 if (err < 0) 584 goto st_accel_probe_trigger_error; 585 } 586 587 err = iio_device_register(indio_dev); 588 if (err) 589 goto st_accel_device_register_error; 590 591 dev_info(&indio_dev->dev, "registered accelerometer %s\n", 592 indio_dev->name); 593 594 return 0; 595 596 st_accel_device_register_error: 597 if (irq > 0) 598 st_sensors_deallocate_trigger(indio_dev); 599 st_accel_probe_trigger_error: 600 st_accel_deallocate_ring(indio_dev); 601 602 return err; 603 } 604 EXPORT_SYMBOL(st_accel_common_probe); 605 606 void st_accel_common_remove(struct iio_dev *indio_dev) 607 { 608 struct st_sensor_data *adata = iio_priv(indio_dev); 609 610 st_sensors_power_disable(indio_dev); 611 612 iio_device_unregister(indio_dev); 613 if (adata->get_irq_data_ready(indio_dev) > 0) 614 st_sensors_deallocate_trigger(indio_dev); 615 616 st_accel_deallocate_ring(indio_dev); 617 } 618 EXPORT_SYMBOL(st_accel_common_remove); 619 620 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 621 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver"); 622 MODULE_LICENSE("GPL v2"); 623