2 * STMicroelectronics accelerometers driver
4 * Copyright 2012-2013 STMicroelectronics Inc.
6 * Denis Ciocca <denis.ciocca@st.com>
8 * Licensed under the GPL-2.
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>
26 #include <linux/iio/common/st_sensors.h>
29 #define ST_ACCEL_NUMBER_DATA_CHANNELS 3
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
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
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)
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)
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)
94 static const struct st_sensor_settings st_accel_sensors_settings[] = {
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,
107 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
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, },
125 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
128 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
129 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
136 .num = ST_ACCEL_FS_AVL_2G,
138 .gain = IIO_G_TO_M_S_2(1000),
141 .num = ST_ACCEL_FS_AVL_4G,
143 .gain = IIO_G_TO_M_S_2(2000),
146 .num = ST_ACCEL_FS_AVL_8G,
148 .gain = IIO_G_TO_M_S_2(4000),
151 .num = ST_ACCEL_FS_AVL_16G,
153 .gain = IIO_G_TO_M_S_2(12000),
167 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
173 .multi_read_bit = true,
178 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
179 .sensors_supported = {
180 [0] = LIS331DLH_ACCEL_DEV_NAME,
181 [1] = LSM303DL_ACCEL_DEV_NAME,
182 [2] = LSM303DLH_ACCEL_DEV_NAME,
183 [3] = LSM303DLM_ACCEL_DEV_NAME,
185 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
190 { .hz = 50, .value = 0x00, },
191 { .hz = 100, .value = 0x01, },
192 { .hz = 400, .value = 0x02, },
193 { .hz = 1000, .value = 0x03, },
199 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
200 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
203 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
204 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
211 .num = ST_ACCEL_FS_AVL_2G,
213 .gain = IIO_G_TO_M_S_2(1000),
216 .num = ST_ACCEL_FS_AVL_4G,
218 .gain = IIO_G_TO_M_S_2(2000),
221 .num = ST_ACCEL_FS_AVL_8G,
223 .gain = IIO_G_TO_M_S_2(3900),
239 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
245 .multi_read_bit = true,
250 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
251 .sensors_supported = {
252 [0] = LSM330_ACCEL_DEV_NAME,
254 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
259 { .hz = 3, .value = 0x01, },
260 { .hz = 6, .value = 0x02, },
261 { .hz = 12, .value = 0x03, },
262 { .hz = 25, .value = 0x04, },
263 { .hz = 50, .value = 0x05, },
264 { .hz = 100, .value = 0x06, },
265 { .hz = 200, .value = 0x07, },
266 { .hz = 400, .value = 0x08, },
267 { .hz = 800, .value = 0x09, },
268 { .hz = 1600, .value = 0x0a, },
274 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
277 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
278 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
285 .num = ST_ACCEL_FS_AVL_2G,
287 .gain = IIO_G_TO_M_S_2(61),
290 .num = ST_ACCEL_FS_AVL_4G,
292 .gain = IIO_G_TO_M_S_2(122),
295 .num = ST_ACCEL_FS_AVL_6G,
297 .gain = IIO_G_TO_M_S_2(183),
300 .num = ST_ACCEL_FS_AVL_8G,
302 .gain = IIO_G_TO_M_S_2(244),
305 .num = ST_ACCEL_FS_AVL_16G,
307 .gain = IIO_G_TO_M_S_2(732),
321 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
331 .multi_read_bit = false,
336 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
337 .sensors_supported = {
338 [0] = LIS3LV02DL_ACCEL_DEV_NAME,
340 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
343 .mask = 0x30, /* DF1 and DF0 */
345 { .hz = 40, .value = 0x00, },
346 { .hz = 160, .value = 0x01, },
347 { .hz = 640, .value = 0x02, },
348 { .hz = 2560, .value = 0x03, },
354 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
355 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
358 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
359 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
366 .num = ST_ACCEL_FS_AVL_2G,
368 .gain = IIO_G_TO_M_S_2(1000),
371 .num = ST_ACCEL_FS_AVL_6G,
373 .gain = IIO_G_TO_M_S_2(3000),
382 * Data Alignment Setting - needs to be set to get
383 * left-justified data like all other sensors.
392 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
398 .multi_read_bit = true,
399 .bootime = 2, /* guess */
403 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
404 .sensors_supported = {
405 [0] = LIS331DL_ACCEL_DEV_NAME,
407 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
412 { .hz = 100, .value = 0x00, },
413 { .hz = 400, .value = 0x01, },
419 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
420 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
423 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
424 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
430 * TODO: check these resulting gain settings, these are
431 * not in the datsheet
435 .num = ST_ACCEL_FS_AVL_2G,
437 .gain = IIO_G_TO_M_S_2(18000),
440 .num = ST_ACCEL_FS_AVL_8G,
442 .gain = IIO_G_TO_M_S_2(72000),
454 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
460 .multi_read_bit = false,
461 .bootime = 2, /* guess */
465 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
466 .sensors_supported = {
467 [0] = H3LIS331DL_DRIVER_NAME,
469 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
474 { .hz = 50, .value = 0x00, },
475 { .hz = 100, .value = 0x01, },
476 { .hz = 400, .value = 0x02, },
477 { .hz = 1000, .value = 0x03, },
483 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
484 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
487 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
488 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
495 .num = ST_ACCEL_FS_AVL_100G,
497 .gain = IIO_G_TO_M_S_2(49000),
500 .num = ST_ACCEL_FS_AVL_200G,
502 .gain = IIO_G_TO_M_S_2(98000),
505 .num = ST_ACCEL_FS_AVL_400G,
507 .gain = IIO_G_TO_M_S_2(195000),
526 .multi_read_bit = true,
530 /* No WAI register present */
531 .sensors_supported = {
532 [0] = LIS3L02DQ_ACCEL_DEV_NAME,
534 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
539 { .hz = 280, .value = 0x00, },
540 { .hz = 560, .value = 0x01, },
541 { .hz = 1120, .value = 0x02, },
542 { .hz = 4480, .value = 0x03, },
548 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
549 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
552 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
553 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
558 .num = ST_ACCEL_FS_AVL_2G,
559 .gain = IIO_G_TO_M_S_2(488),
564 * The part has a BDU bit but if set the data is never
565 * updated so don't set it.
572 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
578 .multi_read_bit = false,
583 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
584 .sensors_supported = {
585 [0] = LNG2DM_ACCEL_DEV_NAME,
587 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
592 { .hz = 1, .value = 0x01, },
593 { .hz = 10, .value = 0x02, },
594 { .hz = 25, .value = 0x03, },
595 { .hz = 50, .value = 0x04, },
596 { .hz = 100, .value = 0x05, },
597 { .hz = 200, .value = 0x06, },
598 { .hz = 400, .value = 0x07, },
599 { .hz = 1600, .value = 0x08, },
605 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
608 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
609 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
616 .num = ST_ACCEL_FS_AVL_2G,
618 .gain = IIO_G_TO_M_S_2(15600),
621 .num = ST_ACCEL_FS_AVL_4G,
623 .gain = IIO_G_TO_M_S_2(31200),
626 .num = ST_ACCEL_FS_AVL_8G,
628 .gain = IIO_G_TO_M_S_2(62500),
631 .num = ST_ACCEL_FS_AVL_16G,
633 .gain = IIO_G_TO_M_S_2(187500),
643 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
649 .multi_read_bit = true,
654 static int st_accel_read_raw(struct iio_dev *indio_dev,
655 struct iio_chan_spec const *ch, int *val,
656 int *val2, long mask)
659 struct st_sensor_data *adata = iio_priv(indio_dev);
662 case IIO_CHAN_INFO_RAW:
663 err = st_sensors_read_info_raw(indio_dev, ch, val);
668 case IIO_CHAN_INFO_SCALE:
669 *val = adata->current_fullscale->gain / 1000000;
670 *val2 = adata->current_fullscale->gain % 1000000;
671 return IIO_VAL_INT_PLUS_MICRO;
672 case IIO_CHAN_INFO_SAMP_FREQ:
683 static int st_accel_write_raw(struct iio_dev *indio_dev,
684 struct iio_chan_spec const *chan, int val, int val2, long mask)
689 case IIO_CHAN_INFO_SCALE: {
692 gain = val * 1000000 + val2;
693 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
696 case IIO_CHAN_INFO_SAMP_FREQ:
699 mutex_lock(&indio_dev->mlock);
700 err = st_sensors_set_odr(indio_dev, val);
701 mutex_unlock(&indio_dev->mlock);
710 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
711 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
713 static struct attribute *st_accel_attributes[] = {
714 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
715 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
719 static const struct attribute_group st_accel_attribute_group = {
720 .attrs = st_accel_attributes,
723 static const struct iio_info accel_info = {
724 .driver_module = THIS_MODULE,
725 .attrs = &st_accel_attribute_group,
726 .read_raw = &st_accel_read_raw,
727 .write_raw = &st_accel_write_raw,
728 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
731 #ifdef CONFIG_IIO_TRIGGER
732 static const struct iio_trigger_ops st_accel_trigger_ops = {
733 .owner = THIS_MODULE,
734 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
735 .validate_device = st_sensors_validate_device,
737 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
739 #define ST_ACCEL_TRIGGER_OPS NULL
742 int st_accel_common_probe(struct iio_dev *indio_dev)
744 struct st_sensor_data *adata = iio_priv(indio_dev);
745 struct st_sensors_platform_data *pdata =
746 (struct st_sensors_platform_data *)adata->dev->platform_data;
747 int irq = adata->get_irq_data_ready(indio_dev);
750 indio_dev->modes = INDIO_DIRECT_MODE;
751 indio_dev->info = &accel_info;
752 mutex_init(&adata->tb.buf_lock);
754 err = st_sensors_power_enable(indio_dev);
758 err = st_sensors_check_device_support(indio_dev,
759 ARRAY_SIZE(st_accel_sensors_settings),
760 st_accel_sensors_settings);
762 goto st_accel_power_off;
764 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
765 adata->multiread_bit = adata->sensor_settings->multi_read_bit;
766 indio_dev->channels = adata->sensor_settings->ch;
767 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
769 adata->current_fullscale = (struct st_sensor_fullscale_avl *)
770 &adata->sensor_settings->fs.fs_avl[0];
771 adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
774 pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
776 err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data);
778 goto st_accel_power_off;
780 err = st_accel_allocate_ring(indio_dev);
782 goto st_accel_power_off;
785 err = st_sensors_allocate_trigger(indio_dev,
786 ST_ACCEL_TRIGGER_OPS);
788 goto st_accel_probe_trigger_error;
791 err = iio_device_register(indio_dev);
793 goto st_accel_device_register_error;
795 dev_info(&indio_dev->dev, "registered accelerometer %s\n",
800 st_accel_device_register_error:
802 st_sensors_deallocate_trigger(indio_dev);
803 st_accel_probe_trigger_error:
804 st_accel_deallocate_ring(indio_dev);
806 st_sensors_power_disable(indio_dev);
810 EXPORT_SYMBOL(st_accel_common_probe);
812 void st_accel_common_remove(struct iio_dev *indio_dev)
814 struct st_sensor_data *adata = iio_priv(indio_dev);
816 st_sensors_power_disable(indio_dev);
818 iio_device_unregister(indio_dev);
819 if (adata->get_irq_data_ready(indio_dev) > 0)
820 st_sensors_deallocate_trigger(indio_dev);
822 st_accel_deallocate_ring(indio_dev);
824 EXPORT_SYMBOL(st_accel_common_remove);
826 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
827 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
828 MODULE_LICENSE("GPL v2");