2 * STMicroelectronics gyroscopes 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/delay.h>
22 #include <linux/iio/iio.h>
23 #include <linux/iio/sysfs.h>
24 #include <linux/iio/trigger.h>
25 #include <linux/iio/buffer.h>
27 #include <linux/iio/common/st_sensors.h>
30 /* DEFAULT VALUE FOR SENSORS */
31 #define ST_GYRO_DEFAULT_OUT_X_L_ADDR 0x28
32 #define ST_GYRO_DEFAULT_OUT_Y_L_ADDR 0x2a
33 #define ST_GYRO_DEFAULT_OUT_Z_L_ADDR 0x2c
36 #define ST_GYRO_FS_AVL_250DPS 250
37 #define ST_GYRO_FS_AVL_500DPS 500
38 #define ST_GYRO_FS_AVL_2000DPS 2000
40 /* CUSTOM VALUES FOR SENSOR 1 */
41 #define ST_GYRO_1_WAI_EXP 0xd3
42 #define ST_GYRO_1_ODR_ADDR 0x20
43 #define ST_GYRO_1_ODR_MASK 0xc0
44 #define ST_GYRO_1_ODR_AVL_100HZ_VAL 0x00
45 #define ST_GYRO_1_ODR_AVL_200HZ_VAL 0x01
46 #define ST_GYRO_1_ODR_AVL_400HZ_VAL 0x02
47 #define ST_GYRO_1_ODR_AVL_800HZ_VAL 0x03
48 #define ST_GYRO_1_PW_ADDR 0x20
49 #define ST_GYRO_1_PW_MASK 0x08
50 #define ST_GYRO_1_FS_ADDR 0x23
51 #define ST_GYRO_1_FS_MASK 0x30
52 #define ST_GYRO_1_FS_AVL_250_VAL 0x00
53 #define ST_GYRO_1_FS_AVL_500_VAL 0x01
54 #define ST_GYRO_1_FS_AVL_2000_VAL 0x02
55 #define ST_GYRO_1_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
56 #define ST_GYRO_1_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
57 #define ST_GYRO_1_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
58 #define ST_GYRO_1_BDU_ADDR 0x23
59 #define ST_GYRO_1_BDU_MASK 0x80
60 #define ST_GYRO_1_DRDY_IRQ_ADDR 0x22
61 #define ST_GYRO_1_DRDY_IRQ_MASK 0x08
62 #define ST_GYRO_1_MULTIREAD_BIT true
64 /* CUSTOM VALUES FOR SENSOR 2 */
65 #define ST_GYRO_2_WAI_EXP 0xd4
66 #define ST_GYRO_2_ODR_ADDR 0x20
67 #define ST_GYRO_2_ODR_MASK 0xc0
68 #define ST_GYRO_2_ODR_AVL_95HZ_VAL 0x00
69 #define ST_GYRO_2_ODR_AVL_190HZ_VAL 0x01
70 #define ST_GYRO_2_ODR_AVL_380HZ_VAL 0x02
71 #define ST_GYRO_2_ODR_AVL_760HZ_VAL 0x03
72 #define ST_GYRO_2_PW_ADDR 0x20
73 #define ST_GYRO_2_PW_MASK 0x08
74 #define ST_GYRO_2_FS_ADDR 0x23
75 #define ST_GYRO_2_FS_MASK 0x30
76 #define ST_GYRO_2_FS_AVL_250_VAL 0x00
77 #define ST_GYRO_2_FS_AVL_500_VAL 0x01
78 #define ST_GYRO_2_FS_AVL_2000_VAL 0x02
79 #define ST_GYRO_2_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
80 #define ST_GYRO_2_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
81 #define ST_GYRO_2_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
82 #define ST_GYRO_2_BDU_ADDR 0x23
83 #define ST_GYRO_2_BDU_MASK 0x80
84 #define ST_GYRO_2_DRDY_IRQ_ADDR 0x22
85 #define ST_GYRO_2_DRDY_IRQ_MASK 0x08
86 #define ST_GYRO_2_MULTIREAD_BIT true
88 static const struct iio_chan_spec st_gyro_16bit_channels
[] = {
89 ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL
, ST_SENSORS_SCAN_X
,
90 IIO_MOD_X
, IIO_LE
, ST_SENSORS_DEFAULT_16_REALBITS
,
91 ST_GYRO_DEFAULT_OUT_X_L_ADDR
),
92 ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL
, ST_SENSORS_SCAN_Y
,
93 IIO_MOD_Y
, IIO_LE
, ST_SENSORS_DEFAULT_16_REALBITS
,
94 ST_GYRO_DEFAULT_OUT_Y_L_ADDR
),
95 ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL
, ST_SENSORS_SCAN_Z
,
96 IIO_MOD_Z
, IIO_LE
, ST_SENSORS_DEFAULT_16_REALBITS
,
97 ST_GYRO_DEFAULT_OUT_Z_L_ADDR
),
98 IIO_CHAN_SOFT_TIMESTAMP(3)
101 static const struct st_sensors st_gyro_sensors
[] = {
103 .wai
= ST_GYRO_1_WAI_EXP
,
104 .sensors_supported
= {
105 [0] = L3G4200D_GYRO_DEV_NAME
,
106 [1] = LSM330DL_GYRO_DEV_NAME
,
108 .ch
= (struct iio_chan_spec
*)st_gyro_16bit_channels
,
110 .addr
= ST_GYRO_1_ODR_ADDR
,
111 .mask
= ST_GYRO_1_ODR_MASK
,
113 { 100, ST_GYRO_1_ODR_AVL_100HZ_VAL
, },
114 { 200, ST_GYRO_1_ODR_AVL_200HZ_VAL
, },
115 { 400, ST_GYRO_1_ODR_AVL_400HZ_VAL
, },
116 { 800, ST_GYRO_1_ODR_AVL_800HZ_VAL
, },
120 .addr
= ST_GYRO_1_PW_ADDR
,
121 .mask
= ST_GYRO_1_PW_MASK
,
122 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
123 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
126 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
127 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
130 .addr
= ST_GYRO_1_FS_ADDR
,
131 .mask
= ST_GYRO_1_FS_MASK
,
134 .num
= ST_GYRO_FS_AVL_250DPS
,
135 .value
= ST_GYRO_1_FS_AVL_250_VAL
,
136 .gain
= ST_GYRO_1_FS_AVL_250_GAIN
,
139 .num
= ST_GYRO_FS_AVL_500DPS
,
140 .value
= ST_GYRO_1_FS_AVL_500_VAL
,
141 .gain
= ST_GYRO_1_FS_AVL_500_GAIN
,
144 .num
= ST_GYRO_FS_AVL_2000DPS
,
145 .value
= ST_GYRO_1_FS_AVL_2000_VAL
,
146 .gain
= ST_GYRO_1_FS_AVL_2000_GAIN
,
151 .addr
= ST_GYRO_1_BDU_ADDR
,
152 .mask
= ST_GYRO_1_BDU_MASK
,
155 .addr
= ST_GYRO_1_DRDY_IRQ_ADDR
,
156 .mask
= ST_GYRO_1_DRDY_IRQ_MASK
,
158 .multi_read_bit
= ST_GYRO_1_MULTIREAD_BIT
,
162 .wai
= ST_GYRO_2_WAI_EXP
,
163 .sensors_supported
= {
164 [0] = L3GD20_GYRO_DEV_NAME
,
165 [1] = L3GD20H_GYRO_DEV_NAME
,
166 [2] = LSM330D_GYRO_DEV_NAME
,
167 [3] = LSM330DLC_GYRO_DEV_NAME
,
168 [4] = L3G4IS_GYRO_DEV_NAME
,
169 [5] = LSM330_GYRO_DEV_NAME
,
171 .ch
= (struct iio_chan_spec
*)st_gyro_16bit_channels
,
173 .addr
= ST_GYRO_2_ODR_ADDR
,
174 .mask
= ST_GYRO_2_ODR_MASK
,
176 { 95, ST_GYRO_2_ODR_AVL_95HZ_VAL
, },
177 { 190, ST_GYRO_2_ODR_AVL_190HZ_VAL
, },
178 { 380, ST_GYRO_2_ODR_AVL_380HZ_VAL
, },
179 { 760, ST_GYRO_2_ODR_AVL_760HZ_VAL
, },
183 .addr
= ST_GYRO_2_PW_ADDR
,
184 .mask
= ST_GYRO_2_PW_MASK
,
185 .value_on
= ST_SENSORS_DEFAULT_POWER_ON_VALUE
,
186 .value_off
= ST_SENSORS_DEFAULT_POWER_OFF_VALUE
,
189 .addr
= ST_SENSORS_DEFAULT_AXIS_ADDR
,
190 .mask
= ST_SENSORS_DEFAULT_AXIS_MASK
,
193 .addr
= ST_GYRO_2_FS_ADDR
,
194 .mask
= ST_GYRO_2_FS_MASK
,
197 .num
= ST_GYRO_FS_AVL_250DPS
,
198 .value
= ST_GYRO_2_FS_AVL_250_VAL
,
199 .gain
= ST_GYRO_2_FS_AVL_250_GAIN
,
202 .num
= ST_GYRO_FS_AVL_500DPS
,
203 .value
= ST_GYRO_2_FS_AVL_500_VAL
,
204 .gain
= ST_GYRO_2_FS_AVL_500_GAIN
,
207 .num
= ST_GYRO_FS_AVL_2000DPS
,
208 .value
= ST_GYRO_2_FS_AVL_2000_VAL
,
209 .gain
= ST_GYRO_2_FS_AVL_2000_GAIN
,
214 .addr
= ST_GYRO_2_BDU_ADDR
,
215 .mask
= ST_GYRO_2_BDU_MASK
,
218 .addr
= ST_GYRO_2_DRDY_IRQ_ADDR
,
219 .mask
= ST_GYRO_2_DRDY_IRQ_MASK
,
221 .multi_read_bit
= ST_GYRO_2_MULTIREAD_BIT
,
226 static int st_gyro_read_raw(struct iio_dev
*indio_dev
,
227 struct iio_chan_spec
const *ch
, int *val
,
228 int *val2
, long mask
)
231 struct st_sensor_data
*gdata
= iio_priv(indio_dev
);
234 case IIO_CHAN_INFO_RAW
:
235 err
= st_sensors_read_info_raw(indio_dev
, ch
, val
);
240 case IIO_CHAN_INFO_SCALE
:
242 *val2
= gdata
->current_fullscale
->gain
;
243 return IIO_VAL_INT_PLUS_MICRO
;
252 static int st_gyro_write_raw(struct iio_dev
*indio_dev
,
253 struct iio_chan_spec
const *chan
, int val
, int val2
, long mask
)
258 case IIO_CHAN_INFO_SCALE
:
259 err
= st_sensors_set_fullscale_by_gain(indio_dev
, val2
);
268 static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
269 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
270 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available
);
272 static struct attribute
*st_gyro_attributes
[] = {
273 &iio_dev_attr_sampling_frequency_available
.dev_attr
.attr
,
274 &iio_dev_attr_in_anglvel_scale_available
.dev_attr
.attr
,
275 &iio_dev_attr_sampling_frequency
.dev_attr
.attr
,
279 static const struct attribute_group st_gyro_attribute_group
= {
280 .attrs
= st_gyro_attributes
,
283 static const struct iio_info gyro_info
= {
284 .driver_module
= THIS_MODULE
,
285 .attrs
= &st_gyro_attribute_group
,
286 .read_raw
= &st_gyro_read_raw
,
287 .write_raw
= &st_gyro_write_raw
,
290 #ifdef CONFIG_IIO_TRIGGER
291 static const struct iio_trigger_ops st_gyro_trigger_ops
= {
292 .owner
= THIS_MODULE
,
293 .set_trigger_state
= ST_GYRO_TRIGGER_SET_STATE
,
295 #define ST_GYRO_TRIGGER_OPS (&st_gyro_trigger_ops)
297 #define ST_GYRO_TRIGGER_OPS NULL
300 int st_gyro_common_probe(struct iio_dev
*indio_dev
)
303 struct st_sensor_data
*gdata
= iio_priv(indio_dev
);
305 indio_dev
->modes
= INDIO_DIRECT_MODE
;
306 indio_dev
->info
= &gyro_info
;
308 err
= st_sensors_check_device_support(indio_dev
,
309 ARRAY_SIZE(st_gyro_sensors
), st_gyro_sensors
);
311 goto st_gyro_common_probe_error
;
313 gdata
->multiread_bit
= gdata
->sensor
->multi_read_bit
;
314 indio_dev
->channels
= gdata
->sensor
->ch
;
315 indio_dev
->num_channels
= ST_SENSORS_NUMBER_ALL_CHANNELS
;
317 gdata
->current_fullscale
= (struct st_sensor_fullscale_avl
*)
318 &gdata
->sensor
->fs
.fs_avl
[0];
319 gdata
->odr
= gdata
->sensor
->odr
.odr_avl
[0].hz
;
321 err
= st_sensors_init_sensor(indio_dev
);
323 goto st_gyro_common_probe_error
;
325 if (gdata
->get_irq_data_ready(indio_dev
) > 0) {
326 err
= st_gyro_allocate_ring(indio_dev
);
328 goto st_gyro_common_probe_error
;
330 err
= st_sensors_allocate_trigger(indio_dev
,
331 ST_GYRO_TRIGGER_OPS
);
333 goto st_gyro_probe_trigger_error
;
336 err
= iio_device_register(indio_dev
);
338 goto st_gyro_device_register_error
;
342 st_gyro_device_register_error
:
343 if (gdata
->get_irq_data_ready(indio_dev
) > 0)
344 st_sensors_deallocate_trigger(indio_dev
);
345 st_gyro_probe_trigger_error
:
346 if (gdata
->get_irq_data_ready(indio_dev
) > 0)
347 st_gyro_deallocate_ring(indio_dev
);
348 st_gyro_common_probe_error
:
351 EXPORT_SYMBOL(st_gyro_common_probe
);
353 void st_gyro_common_remove(struct iio_dev
*indio_dev
)
355 struct st_sensor_data
*gdata
= iio_priv(indio_dev
);
357 iio_device_unregister(indio_dev
);
358 if (gdata
->get_irq_data_ready(indio_dev
) > 0) {
359 st_sensors_deallocate_trigger(indio_dev
);
360 st_gyro_deallocate_ring(indio_dev
);
362 iio_device_free(indio_dev
);
364 EXPORT_SYMBOL(st_gyro_common_remove
);
366 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
367 MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver");
368 MODULE_LICENSE("GPL v2");