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),
168 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
176 .multi_read_bit = true,
181 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
182 .sensors_supported = {
183 [0] = LIS331DLH_ACCEL_DEV_NAME,
184 [1] = LSM303DL_ACCEL_DEV_NAME,
185 [2] = LSM303DLH_ACCEL_DEV_NAME,
186 [3] = LSM303DLM_ACCEL_DEV_NAME,
188 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
193 { .hz = 50, .value = 0x00, },
194 { .hz = 100, .value = 0x01, },
195 { .hz = 400, .value = 0x02, },
196 { .hz = 1000, .value = 0x03, },
202 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
203 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
206 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
207 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
214 .num = ST_ACCEL_FS_AVL_2G,
216 .gain = IIO_G_TO_M_S_2(1000),
219 .num = ST_ACCEL_FS_AVL_4G,
221 .gain = IIO_G_TO_M_S_2(2000),
224 .num = ST_ACCEL_FS_AVL_8G,
226 .gain = IIO_G_TO_M_S_2(3900),
243 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
251 .multi_read_bit = true,
256 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
257 .sensors_supported = {
258 [0] = LSM330_ACCEL_DEV_NAME,
260 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
265 { .hz = 3, .value = 0x01, },
266 { .hz = 6, .value = 0x02, },
267 { .hz = 12, .value = 0x03, },
268 { .hz = 25, .value = 0x04, },
269 { .hz = 50, .value = 0x05, },
270 { .hz = 100, .value = 0x06, },
271 { .hz = 200, .value = 0x07, },
272 { .hz = 400, .value = 0x08, },
273 { .hz = 800, .value = 0x09, },
274 { .hz = 1600, .value = 0x0a, },
280 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
283 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
284 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
291 .num = ST_ACCEL_FS_AVL_2G,
293 .gain = IIO_G_TO_M_S_2(61),
296 .num = ST_ACCEL_FS_AVL_4G,
298 .gain = IIO_G_TO_M_S_2(122),
301 .num = ST_ACCEL_FS_AVL_6G,
303 .gain = IIO_G_TO_M_S_2(183),
306 .num = ST_ACCEL_FS_AVL_8G,
308 .gain = IIO_G_TO_M_S_2(244),
311 .num = ST_ACCEL_FS_AVL_16G,
313 .gain = IIO_G_TO_M_S_2(732),
328 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
340 .multi_read_bit = false,
345 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
346 .sensors_supported = {
347 [0] = LIS3LV02DL_ACCEL_DEV_NAME,
349 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
352 .mask = 0x30, /* DF1 and DF0 */
354 { .hz = 40, .value = 0x00, },
355 { .hz = 160, .value = 0x01, },
356 { .hz = 640, .value = 0x02, },
357 { .hz = 2560, .value = 0x03, },
363 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
364 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
367 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
368 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
375 .num = ST_ACCEL_FS_AVL_2G,
377 .gain = IIO_G_TO_M_S_2(1000),
380 .num = ST_ACCEL_FS_AVL_6G,
382 .gain = IIO_G_TO_M_S_2(3000),
391 * Data Alignment Setting - needs to be set to get
392 * left-justified data like all other sensors.
402 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
410 .multi_read_bit = true,
411 .bootime = 2, /* guess */
415 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
416 .sensors_supported = {
417 [0] = LIS331DL_ACCEL_DEV_NAME,
419 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
424 { .hz = 100, .value = 0x00, },
425 { .hz = 400, .value = 0x01, },
431 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
432 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
435 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
436 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
442 * TODO: check these resulting gain settings, these are
443 * not in the datsheet
447 .num = ST_ACCEL_FS_AVL_2G,
449 .gain = IIO_G_TO_M_S_2(18000),
452 .num = ST_ACCEL_FS_AVL_8G,
454 .gain = IIO_G_TO_M_S_2(72000),
467 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
475 .multi_read_bit = false,
476 .bootime = 2, /* guess */
480 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
481 .sensors_supported = {
482 [0] = H3LIS331DL_ACCEL_DEV_NAME,
484 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
489 { .hz = 50, .value = 0x00, },
490 { .hz = 100, .value = 0x01, },
491 { .hz = 400, .value = 0x02, },
492 { .hz = 1000, .value = 0x03, },
498 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
499 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
502 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
503 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
510 .num = ST_ACCEL_FS_AVL_100G,
512 .gain = IIO_G_TO_M_S_2(49000),
515 .num = ST_ACCEL_FS_AVL_200G,
517 .gain = IIO_G_TO_M_S_2(98000),
520 .num = ST_ACCEL_FS_AVL_400G,
522 .gain = IIO_G_TO_M_S_2(195000),
541 .multi_read_bit = true,
545 /* No WAI register present */
546 .sensors_supported = {
547 [0] = LIS3L02DQ_ACCEL_DEV_NAME,
549 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
554 { .hz = 280, .value = 0x00, },
555 { .hz = 560, .value = 0x01, },
556 { .hz = 1120, .value = 0x02, },
557 { .hz = 4480, .value = 0x03, },
563 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
564 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
567 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
568 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
573 .num = ST_ACCEL_FS_AVL_2G,
574 .gain = IIO_G_TO_M_S_2(488),
579 * The part has a BDU bit but if set the data is never
580 * updated so don't set it.
588 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
596 .multi_read_bit = false,
601 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
602 .sensors_supported = {
603 [0] = LNG2DM_ACCEL_DEV_NAME,
605 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
610 { .hz = 1, .value = 0x01, },
611 { .hz = 10, .value = 0x02, },
612 { .hz = 25, .value = 0x03, },
613 { .hz = 50, .value = 0x04, },
614 { .hz = 100, .value = 0x05, },
615 { .hz = 200, .value = 0x06, },
616 { .hz = 400, .value = 0x07, },
617 { .hz = 1600, .value = 0x08, },
623 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
626 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
627 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
634 .num = ST_ACCEL_FS_AVL_2G,
636 .gain = IIO_G_TO_M_S_2(15600),
639 .num = ST_ACCEL_FS_AVL_4G,
641 .gain = IIO_G_TO_M_S_2(31200),
644 .num = ST_ACCEL_FS_AVL_8G,
646 .gain = IIO_G_TO_M_S_2(62500),
649 .num = ST_ACCEL_FS_AVL_16G,
651 .gain = IIO_G_TO_M_S_2(187500),
662 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
670 .multi_read_bit = true,
675 static int st_accel_read_raw(struct iio_dev *indio_dev,
676 struct iio_chan_spec const *ch, int *val,
677 int *val2, long mask)
680 struct st_sensor_data *adata = iio_priv(indio_dev);
683 case IIO_CHAN_INFO_RAW:
684 err = st_sensors_read_info_raw(indio_dev, ch, val);
689 case IIO_CHAN_INFO_SCALE:
690 *val = adata->current_fullscale->gain / 1000000;
691 *val2 = adata->current_fullscale->gain % 1000000;
692 return IIO_VAL_INT_PLUS_MICRO;
693 case IIO_CHAN_INFO_SAMP_FREQ:
704 static int st_accel_write_raw(struct iio_dev *indio_dev,
705 struct iio_chan_spec const *chan, int val, int val2, long mask)
710 case IIO_CHAN_INFO_SCALE: {
713 gain = val * 1000000 + val2;
714 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
717 case IIO_CHAN_INFO_SAMP_FREQ:
720 mutex_lock(&indio_dev->mlock);
721 err = st_sensors_set_odr(indio_dev, val);
722 mutex_unlock(&indio_dev->mlock);
731 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
732 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
734 static struct attribute *st_accel_attributes[] = {
735 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
736 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
740 static const struct attribute_group st_accel_attribute_group = {
741 .attrs = st_accel_attributes,
744 static const struct iio_info accel_info = {
745 .driver_module = THIS_MODULE,
746 .attrs = &st_accel_attribute_group,
747 .read_raw = &st_accel_read_raw,
748 .write_raw = &st_accel_write_raw,
749 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
752 #ifdef CONFIG_IIO_TRIGGER
753 static const struct iio_trigger_ops st_accel_trigger_ops = {
754 .owner = THIS_MODULE,
755 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
756 .validate_device = st_sensors_validate_device,
758 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
760 #define ST_ACCEL_TRIGGER_OPS NULL
763 int st_accel_common_probe(struct iio_dev *indio_dev)
765 struct st_sensor_data *adata = iio_priv(indio_dev);
766 struct st_sensors_platform_data *pdata =
767 (struct st_sensors_platform_data *)adata->dev->platform_data;
768 int irq = adata->get_irq_data_ready(indio_dev);
771 indio_dev->modes = INDIO_DIRECT_MODE;
772 indio_dev->info = &accel_info;
773 mutex_init(&adata->tb.buf_lock);
775 err = st_sensors_power_enable(indio_dev);
779 err = st_sensors_check_device_support(indio_dev,
780 ARRAY_SIZE(st_accel_sensors_settings),
781 st_accel_sensors_settings);
783 goto st_accel_power_off;
785 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
786 adata->multiread_bit = adata->sensor_settings->multi_read_bit;
787 indio_dev->channels = adata->sensor_settings->ch;
788 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
790 adata->current_fullscale = (struct st_sensor_fullscale_avl *)
791 &adata->sensor_settings->fs.fs_avl[0];
792 adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
795 pdata = (struct st_sensors_platform_data *)&default_accel_pdata;
797 err = st_sensors_init_sensor(indio_dev, pdata);
799 goto st_accel_power_off;
801 err = st_accel_allocate_ring(indio_dev);
803 goto st_accel_power_off;
806 err = st_sensors_allocate_trigger(indio_dev,
807 ST_ACCEL_TRIGGER_OPS);
809 goto st_accel_probe_trigger_error;
812 err = iio_device_register(indio_dev);
814 goto st_accel_device_register_error;
816 dev_info(&indio_dev->dev, "registered accelerometer %s\n",
821 st_accel_device_register_error:
823 st_sensors_deallocate_trigger(indio_dev);
824 st_accel_probe_trigger_error:
825 st_accel_deallocate_ring(indio_dev);
827 st_sensors_power_disable(indio_dev);
831 EXPORT_SYMBOL(st_accel_common_probe);
833 void st_accel_common_remove(struct iio_dev *indio_dev)
835 struct st_sensor_data *adata = iio_priv(indio_dev);
837 st_sensors_power_disable(indio_dev);
839 iio_device_unregister(indio_dev);
840 if (adata->get_irq_data_ready(indio_dev) > 0)
841 st_sensors_deallocate_trigger(indio_dev);
843 st_accel_deallocate_ring(indio_dev);
845 EXPORT_SYMBOL(st_accel_common_remove);
847 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
848 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
849 MODULE_LICENSE("GPL v2");