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
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_MASK 0x10
69 #define ST_ACCEL_1_MULTIREAD_BIT true
71 /* CUSTOM VALUES FOR SENSOR 2 */
72 #define ST_ACCEL_2_WAI_EXP 0x32
73 #define ST_ACCEL_2_ODR_ADDR 0x20
74 #define ST_ACCEL_2_ODR_MASK 0x18
75 #define ST_ACCEL_2_ODR_AVL_50HZ_VAL 0x00
76 #define ST_ACCEL_2_ODR_AVL_100HZ_VAL 0x01
77 #define ST_ACCEL_2_ODR_AVL_400HZ_VAL 0x02
78 #define ST_ACCEL_2_ODR_AVL_1000HZ_VAL 0x03
79 #define ST_ACCEL_2_PW_ADDR 0x20
80 #define ST_ACCEL_2_PW_MASK 0xe0
81 #define ST_ACCEL_2_FS_ADDR 0x23
82 #define ST_ACCEL_2_FS_MASK 0x30
83 #define ST_ACCEL_2_FS_AVL_2_VAL 0X00
84 #define ST_ACCEL_2_FS_AVL_4_VAL 0X01
85 #define ST_ACCEL_2_FS_AVL_8_VAL 0x03
86 #define ST_ACCEL_2_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000)
87 #define ST_ACCEL_2_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000)
88 #define ST_ACCEL_2_FS_AVL_8_GAIN IIO_G_TO_M_S_2(3900)
89 #define ST_ACCEL_2_BDU_ADDR 0x23
90 #define ST_ACCEL_2_BDU_MASK 0x80
91 #define ST_ACCEL_2_DRDY_IRQ_ADDR 0x22
92 #define ST_ACCEL_2_DRDY_IRQ_MASK 0x02
93 #define ST_ACCEL_2_MULTIREAD_BIT true
95 /* CUSTOM VALUES FOR SENSOR 3 */
96 #define ST_ACCEL_3_WAI_EXP 0x40
97 #define ST_ACCEL_3_ODR_ADDR 0x20
98 #define ST_ACCEL_3_ODR_MASK 0xf0
99 #define ST_ACCEL_3_ODR_AVL_3HZ_VAL 0x01
100 #define ST_ACCEL_3_ODR_AVL_6HZ_VAL 0x02
101 #define ST_ACCEL_3_ODR_AVL_12HZ_VAL 0x03
102 #define ST_ACCEL_3_ODR_AVL_25HZ_VAL 0x04
103 #define ST_ACCEL_3_ODR_AVL_50HZ_VAL 0x05
104 #define ST_ACCEL_3_ODR_AVL_100HZ_VAL 0x06
105 #define ST_ACCEL_3_ODR_AVL_200HZ_VAL 0x07
106 #define ST_ACCEL_3_ODR_AVL_400HZ_VAL 0x08
107 #define ST_ACCEL_3_ODR_AVL_800HZ_VAL 0x09
108 #define ST_ACCEL_3_ODR_AVL_1600HZ_VAL 0x0a
109 #define ST_ACCEL_3_FS_ADDR 0x24
110 #define ST_ACCEL_3_FS_MASK 0x38
111 #define ST_ACCEL_3_FS_AVL_2_VAL 0X00
112 #define ST_ACCEL_3_FS_AVL_4_VAL 0X01
113 #define ST_ACCEL_3_FS_AVL_6_VAL 0x02
114 #define ST_ACCEL_3_FS_AVL_8_VAL 0x03
115 #define ST_ACCEL_3_FS_AVL_16_VAL 0x04
116 #define ST_ACCEL_3_FS_AVL_2_GAIN IIO_G_TO_M_S_2(61)
117 #define ST_ACCEL_3_FS_AVL_4_GAIN IIO_G_TO_M_S_2(122)
118 #define ST_ACCEL_3_FS_AVL_6_GAIN IIO_G_TO_M_S_2(183)
119 #define ST_ACCEL_3_FS_AVL_8_GAIN IIO_G_TO_M_S_2(244)
120 #define ST_ACCEL_3_FS_AVL_16_GAIN IIO_G_TO_M_S_2(732)
121 #define ST_ACCEL_3_BDU_ADDR 0x20
122 #define ST_ACCEL_3_BDU_MASK 0x08
123 #define ST_ACCEL_3_DRDY_IRQ_ADDR 0x23
124 #define ST_ACCEL_3_DRDY_IRQ_MASK 0x80
125 #define ST_ACCEL_3_IG1_EN_ADDR 0x23
126 #define ST_ACCEL_3_IG1_EN_MASK 0x08
127 #define ST_ACCEL_3_MULTIREAD_BIT false
129 static const struct iio_chan_spec st_accel_12bit_channels[] = {
130 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
131 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
132 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
133 ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
134 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
135 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
136 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
137 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
138 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
139 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
140 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
141 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
142 IIO_CHAN_SOFT_TIMESTAMP(3)
145 static const struct iio_chan_spec st_accel_16bit_channels[] = {
146 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
147 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
148 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
149 ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
150 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
151 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
152 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
153 ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
154 ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
155 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
156 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
157 ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
158 IIO_CHAN_SOFT_TIMESTAMP(3)
161 static const struct st_sensors st_accel_sensors[] = {
163 .wai = ST_ACCEL_1_WAI_EXP,
164 .sensors_supported = {
165 [0] = LIS3DH_ACCEL_DEV_NAME,
166 [1] = LSM303DLHC_ACCEL_DEV_NAME,
167 [2] = LSM330D_ACCEL_DEV_NAME,
168 [3] = LSM330DL_ACCEL_DEV_NAME,
169 [4] = LSM330DLC_ACCEL_DEV_NAME,
171 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
173 .addr = ST_ACCEL_1_ODR_ADDR,
174 .mask = ST_ACCEL_1_ODR_MASK,
176 { 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, },
177 { 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, },
178 { 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, },
179 { 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, },
180 { 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, },
181 { 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, },
182 { 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, },
183 { 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, },
187 .addr = ST_ACCEL_1_ODR_ADDR,
188 .mask = ST_ACCEL_1_ODR_MASK,
189 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
192 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
193 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
196 .addr = ST_ACCEL_1_FS_ADDR,
197 .mask = ST_ACCEL_1_FS_MASK,
200 .num = ST_ACCEL_FS_AVL_2G,
201 .value = ST_ACCEL_1_FS_AVL_2_VAL,
202 .gain = ST_ACCEL_1_FS_AVL_2_GAIN,
205 .num = ST_ACCEL_FS_AVL_4G,
206 .value = ST_ACCEL_1_FS_AVL_4_VAL,
207 .gain = ST_ACCEL_1_FS_AVL_4_GAIN,
210 .num = ST_ACCEL_FS_AVL_8G,
211 .value = ST_ACCEL_1_FS_AVL_8_VAL,
212 .gain = ST_ACCEL_1_FS_AVL_8_GAIN,
215 .num = ST_ACCEL_FS_AVL_16G,
216 .value = ST_ACCEL_1_FS_AVL_16_VAL,
217 .gain = ST_ACCEL_1_FS_AVL_16_GAIN,
222 .addr = ST_ACCEL_1_BDU_ADDR,
223 .mask = ST_ACCEL_1_BDU_MASK,
226 .addr = ST_ACCEL_1_DRDY_IRQ_ADDR,
227 .mask = ST_ACCEL_1_DRDY_IRQ_MASK,
229 .multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT,
233 .wai = ST_ACCEL_2_WAI_EXP,
234 .sensors_supported = {
235 [0] = LIS331DLH_ACCEL_DEV_NAME,
236 [1] = LSM303DL_ACCEL_DEV_NAME,
237 [2] = LSM303DLH_ACCEL_DEV_NAME,
238 [3] = LSM303DLM_ACCEL_DEV_NAME,
240 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
242 .addr = ST_ACCEL_2_ODR_ADDR,
243 .mask = ST_ACCEL_2_ODR_MASK,
245 { 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, },
246 { 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, },
247 { 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, },
248 { 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, },
252 .addr = ST_ACCEL_2_PW_ADDR,
253 .mask = ST_ACCEL_2_PW_MASK,
254 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
255 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
258 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
259 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
262 .addr = ST_ACCEL_2_FS_ADDR,
263 .mask = ST_ACCEL_2_FS_MASK,
266 .num = ST_ACCEL_FS_AVL_2G,
267 .value = ST_ACCEL_2_FS_AVL_2_VAL,
268 .gain = ST_ACCEL_2_FS_AVL_2_GAIN,
271 .num = ST_ACCEL_FS_AVL_4G,
272 .value = ST_ACCEL_2_FS_AVL_4_VAL,
273 .gain = ST_ACCEL_2_FS_AVL_4_GAIN,
276 .num = ST_ACCEL_FS_AVL_8G,
277 .value = ST_ACCEL_2_FS_AVL_8_VAL,
278 .gain = ST_ACCEL_2_FS_AVL_8_GAIN,
283 .addr = ST_ACCEL_2_BDU_ADDR,
284 .mask = ST_ACCEL_2_BDU_MASK,
287 .addr = ST_ACCEL_2_DRDY_IRQ_ADDR,
288 .mask = ST_ACCEL_2_DRDY_IRQ_MASK,
290 .multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT,
294 .wai = ST_ACCEL_3_WAI_EXP,
295 .sensors_supported = {
296 [0] = LSM330_ACCEL_DEV_NAME,
298 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
300 .addr = ST_ACCEL_3_ODR_ADDR,
301 .mask = ST_ACCEL_3_ODR_MASK,
303 { 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL },
304 { 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, },
305 { 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, },
306 { 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, },
307 { 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, },
308 { 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, },
309 { 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, },
310 { 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, },
311 { 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, },
312 { 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, },
316 .addr = ST_ACCEL_3_ODR_ADDR,
317 .mask = ST_ACCEL_3_ODR_MASK,
318 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
321 .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
322 .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
325 .addr = ST_ACCEL_3_FS_ADDR,
326 .mask = ST_ACCEL_3_FS_MASK,
329 .num = ST_ACCEL_FS_AVL_2G,
330 .value = ST_ACCEL_3_FS_AVL_2_VAL,
331 .gain = ST_ACCEL_3_FS_AVL_2_GAIN,
334 .num = ST_ACCEL_FS_AVL_4G,
335 .value = ST_ACCEL_3_FS_AVL_4_VAL,
336 .gain = ST_ACCEL_3_FS_AVL_4_GAIN,
339 .num = ST_ACCEL_FS_AVL_6G,
340 .value = ST_ACCEL_3_FS_AVL_6_VAL,
341 .gain = ST_ACCEL_3_FS_AVL_6_GAIN,
344 .num = ST_ACCEL_FS_AVL_8G,
345 .value = ST_ACCEL_3_FS_AVL_8_VAL,
346 .gain = ST_ACCEL_3_FS_AVL_8_GAIN,
349 .num = ST_ACCEL_FS_AVL_16G,
350 .value = ST_ACCEL_3_FS_AVL_16_VAL,
351 .gain = ST_ACCEL_3_FS_AVL_16_GAIN,
356 .addr = ST_ACCEL_3_BDU_ADDR,
357 .mask = ST_ACCEL_3_BDU_MASK,
360 .addr = ST_ACCEL_3_DRDY_IRQ_ADDR,
361 .mask = ST_ACCEL_3_DRDY_IRQ_MASK,
363 .en_addr = ST_ACCEL_3_IG1_EN_ADDR,
364 .en_mask = ST_ACCEL_3_IG1_EN_MASK,
367 .multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT,
372 static int st_accel_read_raw(struct iio_dev *indio_dev,
373 struct iio_chan_spec const *ch, int *val,
374 int *val2, long mask)
377 struct st_sensor_data *adata = iio_priv(indio_dev);
380 case IIO_CHAN_INFO_RAW:
381 err = st_sensors_read_info_raw(indio_dev, ch, val);
386 case IIO_CHAN_INFO_SCALE:
388 *val2 = adata->current_fullscale->gain;
389 return IIO_VAL_INT_PLUS_MICRO;
398 static int st_accel_write_raw(struct iio_dev *indio_dev,
399 struct iio_chan_spec const *chan, int val, int val2, long mask)
404 case IIO_CHAN_INFO_SCALE:
405 err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
414 static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
415 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
416 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
418 static struct attribute *st_accel_attributes[] = {
419 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
420 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
421 &iio_dev_attr_sampling_frequency.dev_attr.attr,
425 static const struct attribute_group st_accel_attribute_group = {
426 .attrs = st_accel_attributes,
429 static const struct iio_info accel_info = {
430 .driver_module = THIS_MODULE,
431 .attrs = &st_accel_attribute_group,
432 .read_raw = &st_accel_read_raw,
433 .write_raw = &st_accel_write_raw,
436 #ifdef CONFIG_IIO_TRIGGER
437 static const struct iio_trigger_ops st_accel_trigger_ops = {
438 .owner = THIS_MODULE,
439 .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
441 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
443 #define ST_ACCEL_TRIGGER_OPS NULL
446 int st_accel_common_probe(struct iio_dev *indio_dev)
449 struct st_sensor_data *adata = iio_priv(indio_dev);
451 indio_dev->modes = INDIO_DIRECT_MODE;
452 indio_dev->info = &accel_info;
454 err = st_sensors_check_device_support(indio_dev,
455 ARRAY_SIZE(st_accel_sensors), st_accel_sensors);
457 goto st_accel_common_probe_error;
459 adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
460 adata->multiread_bit = adata->sensor->multi_read_bit;
461 indio_dev->channels = adata->sensor->ch;
462 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
464 adata->current_fullscale = (struct st_sensor_fullscale_avl *)
465 &adata->sensor->fs.fs_avl[0];
466 adata->odr = adata->sensor->odr.odr_avl[0].hz;
468 err = st_sensors_init_sensor(indio_dev);
470 goto st_accel_common_probe_error;
472 if (adata->get_irq_data_ready(indio_dev) > 0) {
473 err = st_accel_allocate_ring(indio_dev);
475 goto st_accel_common_probe_error;
477 err = st_sensors_allocate_trigger(indio_dev,
478 ST_ACCEL_TRIGGER_OPS);
480 goto st_accel_probe_trigger_error;
483 err = iio_device_register(indio_dev);
485 goto st_accel_device_register_error;
489 st_accel_device_register_error:
490 if (adata->get_irq_data_ready(indio_dev) > 0)
491 st_sensors_deallocate_trigger(indio_dev);
492 st_accel_probe_trigger_error:
493 if (adata->get_irq_data_ready(indio_dev) > 0)
494 st_accel_deallocate_ring(indio_dev);
495 st_accel_common_probe_error:
498 EXPORT_SYMBOL(st_accel_common_probe);
500 void st_accel_common_remove(struct iio_dev *indio_dev)
502 struct st_sensor_data *adata = iio_priv(indio_dev);
504 iio_device_unregister(indio_dev);
505 if (adata->get_irq_data_ready(indio_dev) > 0) {
506 st_sensors_deallocate_trigger(indio_dev);
507 st_accel_deallocate_ring(indio_dev);
509 iio_device_free(indio_dev);
511 EXPORT_SYMBOL(st_accel_common_remove);
513 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
514 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
515 MODULE_LICENSE("GPL v2");