Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 | /* * STMicroelectronics magnetometers driver * * Copyright 2012-2013 STMicroelectronics Inc. * * Denis Ciocca <denis.ciocca@st.com> * * Licensed under the GPL-2. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/types.h> #include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/gpio.h> #include <linux/irq.h> #include <linux/delay.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> #include <linux/iio/common/st_sensors.h> #include "st_magn.h" #define ST_MAGN_NUMBER_DATA_CHANNELS 3 /* DEFAULT VALUE FOR SENSORS */ #define ST_MAGN_DEFAULT_OUT_X_H_ADDR 0X03 #define ST_MAGN_DEFAULT_OUT_Y_H_ADDR 0X07 #define ST_MAGN_DEFAULT_OUT_Z_H_ADDR 0X05 /* FULLSCALE */ #define ST_MAGN_FS_AVL_1300MG 1300 #define ST_MAGN_FS_AVL_1900MG 1900 #define ST_MAGN_FS_AVL_2500MG 2500 #define ST_MAGN_FS_AVL_4000MG 4000 #define ST_MAGN_FS_AVL_4700MG 4700 #define ST_MAGN_FS_AVL_5600MG 5600 #define ST_MAGN_FS_AVL_8000MG 8000 #define ST_MAGN_FS_AVL_8100MG 8100 #define ST_MAGN_FS_AVL_10000MG 10000 /* CUSTOM VALUES FOR SENSOR 1 */ #define ST_MAGN_1_WAI_EXP 0x3c #define ST_MAGN_1_ODR_ADDR 0x00 #define ST_MAGN_1_ODR_MASK 0x1c #define ST_MAGN_1_ODR_AVL_1HZ_VAL 0x00 #define ST_MAGN_1_ODR_AVL_2HZ_VAL 0x01 #define ST_MAGN_1_ODR_AVL_3HZ_VAL 0x02 #define ST_MAGN_1_ODR_AVL_8HZ_VAL 0x03 #define ST_MAGN_1_ODR_AVL_15HZ_VAL 0x04 #define ST_MAGN_1_ODR_AVL_30HZ_VAL 0x05 #define ST_MAGN_1_ODR_AVL_75HZ_VAL 0x06 #define ST_MAGN_1_ODR_AVL_220HZ_VAL 0x07 #define ST_MAGN_1_PW_ADDR 0x02 #define ST_MAGN_1_PW_MASK 0x03 #define ST_MAGN_1_PW_ON 0x00 #define ST_MAGN_1_PW_OFF 0x03 #define ST_MAGN_1_FS_ADDR 0x01 #define ST_MAGN_1_FS_MASK 0xe0 #define ST_MAGN_1_FS_AVL_1300_VAL 0x01 #define ST_MAGN_1_FS_AVL_1900_VAL 0x02 #define ST_MAGN_1_FS_AVL_2500_VAL 0x03 #define ST_MAGN_1_FS_AVL_4000_VAL 0x04 #define ST_MAGN_1_FS_AVL_4700_VAL 0x05 #define ST_MAGN_1_FS_AVL_5600_VAL 0x06 #define ST_MAGN_1_FS_AVL_8100_VAL 0x07 #define ST_MAGN_1_FS_AVL_1300_GAIN_XY 1100 #define ST_MAGN_1_FS_AVL_1900_GAIN_XY 855 #define ST_MAGN_1_FS_AVL_2500_GAIN_XY 670 #define ST_MAGN_1_FS_AVL_4000_GAIN_XY 450 #define ST_MAGN_1_FS_AVL_4700_GAIN_XY 400 #define ST_MAGN_1_FS_AVL_5600_GAIN_XY 330 #define ST_MAGN_1_FS_AVL_8100_GAIN_XY 230 #define ST_MAGN_1_FS_AVL_1300_GAIN_Z 980 #define ST_MAGN_1_FS_AVL_1900_GAIN_Z 760 #define ST_MAGN_1_FS_AVL_2500_GAIN_Z 600 #define ST_MAGN_1_FS_AVL_4000_GAIN_Z 400 #define ST_MAGN_1_FS_AVL_4700_GAIN_Z 355 #define ST_MAGN_1_FS_AVL_5600_GAIN_Z 295 #define ST_MAGN_1_FS_AVL_8100_GAIN_Z 205 #define ST_MAGN_1_MULTIREAD_BIT false /* CUSTOM VALUES FOR SENSOR 2 */ #define ST_MAGN_2_WAI_EXP 0x3d #define ST_MAGN_2_ODR_ADDR 0x20 #define ST_MAGN_2_ODR_MASK 0x1c #define ST_MAGN_2_ODR_AVL_1HZ_VAL 0x00 #define ST_MAGN_2_ODR_AVL_2HZ_VAL 0x01 #define ST_MAGN_2_ODR_AVL_3HZ_VAL 0x02 #define ST_MAGN_2_ODR_AVL_5HZ_VAL 0x03 #define ST_MAGN_2_ODR_AVL_10HZ_VAL 0x04 #define ST_MAGN_2_ODR_AVL_20HZ_VAL 0x05 #define ST_MAGN_2_ODR_AVL_40HZ_VAL 0x06 #define ST_MAGN_2_ODR_AVL_80HZ_VAL 0x07 #define ST_MAGN_2_PW_ADDR 0x22 #define ST_MAGN_2_PW_MASK 0x03 #define ST_MAGN_2_PW_ON 0x00 #define ST_MAGN_2_PW_OFF 0x03 #define ST_MAGN_2_FS_ADDR 0x21 #define ST_MAGN_2_FS_MASK 0x60 #define ST_MAGN_2_FS_AVL_4000_VAL 0x00 #define ST_MAGN_2_FS_AVL_8000_VAL 0x01 #define ST_MAGN_2_FS_AVL_10000_VAL 0x02 #define ST_MAGN_2_FS_AVL_4000_GAIN 430 #define ST_MAGN_2_FS_AVL_8000_GAIN 230 #define ST_MAGN_2_FS_AVL_10000_GAIN 230 #define ST_MAGN_2_MULTIREAD_BIT false #define ST_MAGN_2_OUT_X_L_ADDR 0x28 #define ST_MAGN_2_OUT_Y_L_ADDR 0x2a #define ST_MAGN_2_OUT_Z_L_ADDR 0x2c static const struct iio_chan_spec st_magn_16bit_channels[] = { ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_BE, 16, 16, ST_MAGN_DEFAULT_OUT_X_H_ADDR), ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_BE, 16, 16, ST_MAGN_DEFAULT_OUT_Y_H_ADDR), ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_BE, 16, 16, ST_MAGN_DEFAULT_OUT_Z_H_ADDR), IIO_CHAN_SOFT_TIMESTAMP(3) }; static const struct iio_chan_spec st_magn_2_16bit_channels[] = { ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16, ST_MAGN_2_OUT_X_L_ADDR), ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16, ST_MAGN_2_OUT_Y_L_ADDR), ST_SENSORS_LSM_CHANNELS(IIO_MAGN, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16, ST_MAGN_2_OUT_Z_L_ADDR), IIO_CHAN_SOFT_TIMESTAMP(3) }; static const struct st_sensors st_magn_sensors[] = { { .wai = ST_MAGN_1_WAI_EXP, .sensors_supported = { [0] = LSM303DLHC_MAGN_DEV_NAME, [1] = LSM303DLM_MAGN_DEV_NAME, }, .ch = (struct iio_chan_spec *)st_magn_16bit_channels, .odr = { .addr = ST_MAGN_1_ODR_ADDR, .mask = ST_MAGN_1_ODR_MASK, .odr_avl = { { 1, ST_MAGN_1_ODR_AVL_1HZ_VAL, }, { 2, ST_MAGN_1_ODR_AVL_2HZ_VAL, }, { 3, ST_MAGN_1_ODR_AVL_3HZ_VAL, }, { 8, ST_MAGN_1_ODR_AVL_8HZ_VAL, }, { 15, ST_MAGN_1_ODR_AVL_15HZ_VAL, }, { 30, ST_MAGN_1_ODR_AVL_30HZ_VAL, }, { 75, ST_MAGN_1_ODR_AVL_75HZ_VAL, }, { 220, ST_MAGN_1_ODR_AVL_220HZ_VAL, }, }, }, .pw = { .addr = ST_MAGN_1_PW_ADDR, .mask = ST_MAGN_1_PW_MASK, .value_on = ST_MAGN_1_PW_ON, .value_off = ST_MAGN_1_PW_OFF, }, .fs = { .addr = ST_MAGN_1_FS_ADDR, .mask = ST_MAGN_1_FS_MASK, .fs_avl = { [0] = { .num = ST_MAGN_FS_AVL_1300MG, .value = ST_MAGN_1_FS_AVL_1300_VAL, .gain = ST_MAGN_1_FS_AVL_1300_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_1300_GAIN_Z, }, [1] = { .num = ST_MAGN_FS_AVL_1900MG, .value = ST_MAGN_1_FS_AVL_1900_VAL, .gain = ST_MAGN_1_FS_AVL_1900_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_1900_GAIN_Z, }, [2] = { .num = ST_MAGN_FS_AVL_2500MG, .value = ST_MAGN_1_FS_AVL_2500_VAL, .gain = ST_MAGN_1_FS_AVL_2500_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_2500_GAIN_Z, }, [3] = { .num = ST_MAGN_FS_AVL_4000MG, .value = ST_MAGN_1_FS_AVL_4000_VAL, .gain = ST_MAGN_1_FS_AVL_4000_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_4000_GAIN_Z, }, [4] = { .num = ST_MAGN_FS_AVL_4700MG, .value = ST_MAGN_1_FS_AVL_4700_VAL, .gain = ST_MAGN_1_FS_AVL_4700_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_4700_GAIN_Z, }, [5] = { .num = ST_MAGN_FS_AVL_5600MG, .value = ST_MAGN_1_FS_AVL_5600_VAL, .gain = ST_MAGN_1_FS_AVL_5600_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_5600_GAIN_Z, }, [6] = { .num = ST_MAGN_FS_AVL_8100MG, .value = ST_MAGN_1_FS_AVL_8100_VAL, .gain = ST_MAGN_1_FS_AVL_8100_GAIN_XY, .gain2 = ST_MAGN_1_FS_AVL_8100_GAIN_Z, }, }, }, .multi_read_bit = ST_MAGN_1_MULTIREAD_BIT, .bootime = 2, }, { .wai = ST_MAGN_2_WAI_EXP, .sensors_supported = { [0] = LIS3MDL_MAGN_DEV_NAME, }, .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels, .odr = { .addr = ST_MAGN_2_ODR_ADDR, .mask = ST_MAGN_2_ODR_MASK, .odr_avl = { { 1, ST_MAGN_2_ODR_AVL_1HZ_VAL, }, { 2, ST_MAGN_2_ODR_AVL_2HZ_VAL, }, { 3, ST_MAGN_2_ODR_AVL_3HZ_VAL, }, { 5, ST_MAGN_2_ODR_AVL_5HZ_VAL, }, { 10, ST_MAGN_2_ODR_AVL_10HZ_VAL, }, { 20, ST_MAGN_2_ODR_AVL_20HZ_VAL, }, { 40, ST_MAGN_2_ODR_AVL_40HZ_VAL, }, { 80, ST_MAGN_2_ODR_AVL_80HZ_VAL, }, }, }, .pw = { .addr = ST_MAGN_2_PW_ADDR, .mask = ST_MAGN_2_PW_MASK, .value_on = ST_MAGN_2_PW_ON, .value_off = ST_MAGN_2_PW_OFF, }, .fs = { .addr = ST_MAGN_2_FS_ADDR, .mask = ST_MAGN_2_FS_MASK, .fs_avl = { [0] = { .num = ST_MAGN_FS_AVL_4000MG, .value = ST_MAGN_2_FS_AVL_4000_VAL, .gain = ST_MAGN_2_FS_AVL_4000_GAIN, }, [1] = { .num = ST_MAGN_FS_AVL_8000MG, .value = ST_MAGN_2_FS_AVL_8000_VAL, .gain = ST_MAGN_2_FS_AVL_8000_GAIN, }, [2] = { .num = ST_MAGN_FS_AVL_10000MG, .value = ST_MAGN_2_FS_AVL_10000_VAL, .gain = ST_MAGN_2_FS_AVL_10000_GAIN, }, }, }, .multi_read_bit = ST_MAGN_2_MULTIREAD_BIT, .bootime = 2, }, }; static int st_magn_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *ch, int *val, int *val2, long mask) { int err; struct st_sensor_data *mdata = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_RAW: err = st_sensors_read_info_raw(indio_dev, ch, val); if (err < 0) goto read_error; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = 0; if ((ch->scan_index == ST_SENSORS_SCAN_Z) && (mdata->current_fullscale->gain2 != 0)) *val2 = mdata->current_fullscale->gain2; else *val2 = mdata->current_fullscale->gain; return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } read_error: return err; } static int st_magn_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { int err; switch (mask) { case IIO_CHAN_INFO_SCALE: err = st_sensors_set_fullscale_by_gain(indio_dev, val2); break; default: err = -EINVAL; } return err; } static ST_SENSOR_DEV_ATTR_SAMP_FREQ(); static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available); static struct attribute *st_magn_attributes[] = { &iio_dev_attr_sampling_frequency_available.dev_attr.attr, &iio_dev_attr_in_magn_scale_available.dev_attr.attr, &iio_dev_attr_sampling_frequency.dev_attr.attr, NULL, }; static const struct attribute_group st_magn_attribute_group = { .attrs = st_magn_attributes, }; static const struct iio_info magn_info = { .driver_module = THIS_MODULE, .attrs = &st_magn_attribute_group, .read_raw = &st_magn_read_raw, .write_raw = &st_magn_write_raw, }; int st_magn_common_probe(struct iio_dev *indio_dev, struct st_sensors_platform_data *pdata) { struct st_sensor_data *mdata = iio_priv(indio_dev); int irq = mdata->get_irq_data_ready(indio_dev); int err; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &magn_info; err = st_sensors_check_device_support(indio_dev, ARRAY_SIZE(st_magn_sensors), st_magn_sensors); if (err < 0) return err; mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; mdata->multiread_bit = mdata->sensor->multi_read_bit; indio_dev->channels = mdata->sensor->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; mdata->current_fullscale = (struct st_sensor_fullscale_avl *) &mdata->sensor->fs.fs_avl[0]; mdata->odr = mdata->sensor->odr.odr_avl[0].hz; err = st_sensors_init_sensor(indio_dev, pdata); if (err < 0) return err; err = st_magn_allocate_ring(indio_dev); if (err < 0) return err; if (irq > 0) { err = st_sensors_allocate_trigger(indio_dev, NULL); if (err < 0) goto st_magn_probe_trigger_error; } err = iio_device_register(indio_dev); if (err) goto st_magn_device_register_error; return 0; st_magn_device_register_error: if (irq > 0) st_sensors_deallocate_trigger(indio_dev); st_magn_probe_trigger_error: st_magn_deallocate_ring(indio_dev); return err; } EXPORT_SYMBOL(st_magn_common_probe); void st_magn_common_remove(struct iio_dev *indio_dev) { struct st_sensor_data *mdata = iio_priv(indio_dev); iio_device_unregister(indio_dev); if (mdata->get_irq_data_ready(indio_dev) > 0) st_sensors_deallocate_trigger(indio_dev); st_magn_deallocate_ring(indio_dev); } EXPORT_SYMBOL(st_magn_common_remove); MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); MODULE_DESCRIPTION("STMicroelectronics magnetometers driver"); MODULE_LICENSE("GPL v2"); |