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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>
26#include <asm/unaligned.h>
27
28#include <linux/iio/common/st_sensors.h>
29#include "st_pressure.h"
30
31#define ST_PRESS_LSB_PER_MBAR 4096UL
32#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
33 ST_PRESS_LSB_PER_MBAR)
34#define ST_PRESS_LSB_PER_CELSIUS 480UL
35#define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \
36 ST_PRESS_LSB_PER_CELSIUS)
37#define ST_PRESS_NUMBER_DATA_CHANNELS 1
38
39
40#define ST_PRESS_DEFAULT_OUT_XL_ADDR 0x28
41#define ST_TEMP_DEFAULT_OUT_L_ADDR 0x2b
42
43
44#define ST_PRESS_FS_AVL_1260MB 1260
45
46
47#define ST_PRESS_1_WAI_EXP 0xbb
48#define ST_PRESS_1_ODR_ADDR 0x20
49#define ST_PRESS_1_ODR_MASK 0x70
50#define ST_PRESS_1_ODR_AVL_1HZ_VAL 0x01
51#define ST_PRESS_1_ODR_AVL_7HZ_VAL 0x05
52#define ST_PRESS_1_ODR_AVL_13HZ_VAL 0x06
53#define ST_PRESS_1_ODR_AVL_25HZ_VAL 0x07
54#define ST_PRESS_1_PW_ADDR 0x20
55#define ST_PRESS_1_PW_MASK 0x80
56#define ST_PRESS_1_FS_ADDR 0x23
57#define ST_PRESS_1_FS_MASK 0x30
58#define ST_PRESS_1_FS_AVL_1260_VAL 0x00
59#define ST_PRESS_1_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
60#define ST_PRESS_1_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
61#define ST_PRESS_1_BDU_ADDR 0x20
62#define ST_PRESS_1_BDU_MASK 0x04
63#define ST_PRESS_1_DRDY_IRQ_ADDR 0x22
64#define ST_PRESS_1_DRDY_IRQ_INT1_MASK 0x04
65#define ST_PRESS_1_DRDY_IRQ_INT2_MASK 0x20
66#define ST_PRESS_1_MULTIREAD_BIT true
67#define ST_PRESS_1_TEMP_OFFSET 42500
68
69static const struct iio_chan_spec st_press_channels[] = {
70 ST_SENSORS_LSM_CHANNELS(IIO_PRESSURE,
71 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
72 ST_SENSORS_SCAN_X, 0, IIO_NO_MOD, 'u', IIO_LE, 24, 24,
73 ST_PRESS_DEFAULT_OUT_XL_ADDR),
74 ST_SENSORS_LSM_CHANNELS(IIO_TEMP,
75 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) |
76 BIT(IIO_CHAN_INFO_OFFSET),
77 -1, 0, IIO_NO_MOD, 's', IIO_LE, 16, 16,
78 ST_TEMP_DEFAULT_OUT_L_ADDR),
79 IIO_CHAN_SOFT_TIMESTAMP(1)
80};
81
82static const struct st_sensors st_press_sensors[] = {
83 {
84 .wai = ST_PRESS_1_WAI_EXP,
85 .sensors_supported = {
86 [0] = LPS331AP_PRESS_DEV_NAME,
87 },
88 .ch = (struct iio_chan_spec *)st_press_channels,
89 .odr = {
90 .addr = ST_PRESS_1_ODR_ADDR,
91 .mask = ST_PRESS_1_ODR_MASK,
92 .odr_avl = {
93 { 1, ST_PRESS_1_ODR_AVL_1HZ_VAL, },
94 { 7, ST_PRESS_1_ODR_AVL_7HZ_VAL, },
95 { 13, ST_PRESS_1_ODR_AVL_13HZ_VAL, },
96 { 25, ST_PRESS_1_ODR_AVL_25HZ_VAL, },
97 },
98 },
99 .pw = {
100 .addr = ST_PRESS_1_PW_ADDR,
101 .mask = ST_PRESS_1_PW_MASK,
102 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
103 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
104 },
105 .fs = {
106 .addr = ST_PRESS_1_FS_ADDR,
107 .mask = ST_PRESS_1_FS_MASK,
108 .fs_avl = {
109 [0] = {
110 .num = ST_PRESS_FS_AVL_1260MB,
111 .value = ST_PRESS_1_FS_AVL_1260_VAL,
112 .gain = ST_PRESS_1_FS_AVL_1260_GAIN,
113 .gain2 = ST_PRESS_1_FS_AVL_TEMP_GAIN,
114 },
115 },
116 },
117 .bdu = {
118 .addr = ST_PRESS_1_BDU_ADDR,
119 .mask = ST_PRESS_1_BDU_MASK,
120 },
121 .drdy_irq = {
122 .addr = ST_PRESS_1_DRDY_IRQ_ADDR,
123 .mask_int1 = ST_PRESS_1_DRDY_IRQ_INT1_MASK,
124 .mask_int2 = ST_PRESS_1_DRDY_IRQ_INT2_MASK,
125 },
126 .multi_read_bit = ST_PRESS_1_MULTIREAD_BIT,
127 .bootime = 2,
128 },
129};
130
131static int st_press_read_raw(struct iio_dev *indio_dev,
132 struct iio_chan_spec const *ch, int *val,
133 int *val2, long mask)
134{
135 int err;
136 struct st_sensor_data *pdata = iio_priv(indio_dev);
137
138 switch (mask) {
139 case IIO_CHAN_INFO_RAW:
140 err = st_sensors_read_info_raw(indio_dev, ch, val);
141 if (err < 0)
142 goto read_error;
143
144 return IIO_VAL_INT;
145 case IIO_CHAN_INFO_SCALE:
146 *val = 0;
147
148 switch (ch->type) {
149 case IIO_PRESSURE:
150 *val2 = pdata->current_fullscale->gain;
151 break;
152 case IIO_TEMP:
153 *val2 = pdata->current_fullscale->gain2;
154 break;
155 default:
156 err = -EINVAL;
157 goto read_error;
158 }
159
160 return IIO_VAL_INT_PLUS_NANO;
161 case IIO_CHAN_INFO_OFFSET:
162 switch (ch->type) {
163 case IIO_TEMP:
164 *val = 425;
165 *val2 = 10;
166 break;
167 default:
168 err = -EINVAL;
169 goto read_error;
170 }
171
172 return IIO_VAL_FRACTIONAL;
173 default:
174 return -EINVAL;
175 }
176
177read_error:
178 return err;
179}
180
181static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
182static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
183
184static struct attribute *st_press_attributes[] = {
185 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
186 &iio_dev_attr_sampling_frequency.dev_attr.attr,
187 NULL,
188};
189
190static const struct attribute_group st_press_attribute_group = {
191 .attrs = st_press_attributes,
192};
193
194static const struct iio_info press_info = {
195 .driver_module = THIS_MODULE,
196 .attrs = &st_press_attribute_group,
197 .read_raw = &st_press_read_raw,
198};
199
200#ifdef CONFIG_IIO_TRIGGER
201static const struct iio_trigger_ops st_press_trigger_ops = {
202 .owner = THIS_MODULE,
203 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
204};
205#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
206#else
207#define ST_PRESS_TRIGGER_OPS NULL
208#endif
209
210int st_press_common_probe(struct iio_dev *indio_dev,
211 struct st_sensors_platform_data *plat_data)
212{
213 int err;
214 struct st_sensor_data *pdata = iio_priv(indio_dev);
215
216 indio_dev->modes = INDIO_DIRECT_MODE;
217 indio_dev->info = &press_info;
218
219 err = st_sensors_check_device_support(indio_dev,
220 ARRAY_SIZE(st_press_sensors), st_press_sensors);
221 if (err < 0)
222 goto st_press_common_probe_error;
223
224 pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
225 pdata->multiread_bit = pdata->sensor->multi_read_bit;
226 indio_dev->channels = pdata->sensor->ch;
227 indio_dev->num_channels = ARRAY_SIZE(st_press_channels);
228
229 pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
230 &pdata->sensor->fs.fs_avl[0];
231 pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
232
233 if (!plat_data)
234 plat_data =
235 (struct st_sensors_platform_data *)&default_press_pdata;
236
237 err = st_sensors_init_sensor(indio_dev, plat_data);
238 if (err < 0)
239 goto st_press_common_probe_error;
240
241 if (pdata->get_irq_data_ready(indio_dev) > 0) {
242 err = st_press_allocate_ring(indio_dev);
243 if (err < 0)
244 goto st_press_common_probe_error;
245
246 err = st_sensors_allocate_trigger(indio_dev,
247 ST_PRESS_TRIGGER_OPS);
248 if (err < 0)
249 goto st_press_probe_trigger_error;
250 }
251
252 err = iio_device_register(indio_dev);
253 if (err)
254 goto st_press_device_register_error;
255
256 return err;
257
258st_press_device_register_error:
259 if (pdata->get_irq_data_ready(indio_dev) > 0)
260 st_sensors_deallocate_trigger(indio_dev);
261st_press_probe_trigger_error:
262 if (pdata->get_irq_data_ready(indio_dev) > 0)
263 st_press_deallocate_ring(indio_dev);
264st_press_common_probe_error:
265 return err;
266}
267EXPORT_SYMBOL(st_press_common_probe);
268
269void st_press_common_remove(struct iio_dev *indio_dev)
270{
271 struct st_sensor_data *pdata = iio_priv(indio_dev);
272
273 iio_device_unregister(indio_dev);
274 if (pdata->get_irq_data_ready(indio_dev) > 0) {
275 st_sensors_deallocate_trigger(indio_dev);
276 st_press_deallocate_ring(indio_dev);
277 }
278}
279EXPORT_SYMBOL(st_press_common_remove);
280
281MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
282MODULE_DESCRIPTION("STMicroelectronics pressures driver");
283MODULE_LICENSE("GPL v2");
284
