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irqchip/omap-intc: Remove duplicate setup for IRQ chip type handler
[linux/fpc-iii.git] / drivers / iio / pressure / st_pressure_core.c
blobb39a2fb0671cd15638c0db19c2f068a52a02f8b6
1 /*
2 * STMicroelectronics pressures driver
3 *
4 * Copyright 2013 STMicroelectronics Inc.
5 *
6 * Denis Ciocca <denis.ciocca@st.com>
7 *
8 * Licensed under the GPL-2.
9 */
10
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 /* FULLSCALE */
40 #define ST_PRESS_FS_AVL_1260MB 1260
41
42 #define ST_PRESS_1_OUT_XL_ADDR 0x28
43 #define ST_TEMP_1_OUT_L_ADDR 0x2b
44
45 /* CUSTOM VALUES FOR LPS331AP SENSOR */
46 #define ST_PRESS_LPS331AP_WAI_EXP 0xbb
47 #define ST_PRESS_LPS331AP_ODR_ADDR 0x20
48 #define ST_PRESS_LPS331AP_ODR_MASK 0x70
49 #define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01
50 #define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05
51 #define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06
52 #define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07
53 #define ST_PRESS_LPS331AP_PW_ADDR 0x20
54 #define ST_PRESS_LPS331AP_PW_MASK 0x80
55 #define ST_PRESS_LPS331AP_FS_ADDR 0x23
56 #define ST_PRESS_LPS331AP_FS_MASK 0x30
57 #define ST_PRESS_LPS331AP_FS_AVL_1260_VAL 0x00
58 #define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
59 #define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
60 #define ST_PRESS_LPS331AP_BDU_ADDR 0x20
61 #define ST_PRESS_LPS331AP_BDU_MASK 0x04
62 #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22
63 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04
64 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20
65 #define ST_PRESS_LPS331AP_MULTIREAD_BIT true
66 #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
67
68 /* CUSTOM VALUES FOR LPS001WP SENSOR */
69 #define ST_PRESS_LPS001WP_WAI_EXP 0xba
70 #define ST_PRESS_LPS001WP_ODR_ADDR 0x20
71 #define ST_PRESS_LPS001WP_ODR_MASK 0x30
72 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
73 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
74 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
75 #define ST_PRESS_LPS001WP_PW_ADDR 0x20
76 #define ST_PRESS_LPS001WP_PW_MASK 0x40
77 #define ST_PRESS_LPS001WP_BDU_ADDR 0x20
78 #define ST_PRESS_LPS001WP_BDU_MASK 0x04
79 #define ST_PRESS_LPS001WP_MULTIREAD_BIT true
80 #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
81 #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
82
83 /* CUSTOM VALUES FOR LPS25H SENSOR */
84 #define ST_PRESS_LPS25H_WAI_EXP 0xbd
85 #define ST_PRESS_LPS25H_ODR_ADDR 0x20
86 #define ST_PRESS_LPS25H_ODR_MASK 0x70
87 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
88 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
89 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
90 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
91 #define ST_PRESS_LPS25H_PW_ADDR 0x20
92 #define ST_PRESS_LPS25H_PW_MASK 0x80
93 #define ST_PRESS_LPS25H_FS_ADDR 0x00
94 #define ST_PRESS_LPS25H_FS_MASK 0x00
95 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
96 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
97 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
98 #define ST_PRESS_LPS25H_BDU_ADDR 0x20
99 #define ST_PRESS_LPS25H_BDU_MASK 0x04
100 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
101 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
102 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
103 #define ST_PRESS_LPS25H_MULTIREAD_BIT true
104 #define ST_PRESS_LPS25H_TEMP_OFFSET 42500
105 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
106 #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
107
108 static const struct iio_chan_spec st_press_1_channels[] = {
109 {
110 .type = IIO_PRESSURE,
111 .channel2 = IIO_NO_MOD,
112 .address = ST_PRESS_1_OUT_XL_ADDR,
113 .scan_index = ST_SENSORS_SCAN_X,
114 .scan_type = {
115 .sign = 'u',
116 .realbits = 24,
117 .storagebits = 24,
118 .endianness = IIO_LE,
119 },
120 .info_mask_separate =
121 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
122 .modified = 0,
123 },
124 {
125 .type = IIO_TEMP,
126 .channel2 = IIO_NO_MOD,
127 .address = ST_TEMP_1_OUT_L_ADDR,
128 .scan_index = -1,
129 .scan_type = {
130 .sign = 'u',
131 .realbits = 16,
132 .storagebits = 16,
133 .endianness = IIO_LE,
134 },
135 .info_mask_separate =
136 BIT(IIO_CHAN_INFO_RAW) |
137 BIT(IIO_CHAN_INFO_SCALE) |
138 BIT(IIO_CHAN_INFO_OFFSET),
139 .modified = 0,
140 },
141 IIO_CHAN_SOFT_TIMESTAMP(1)
142 };
143
144 static const struct iio_chan_spec st_press_lps001wp_channels[] = {
145 {
146 .type = IIO_PRESSURE,
147 .channel2 = IIO_NO_MOD,
148 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
149 .scan_index = ST_SENSORS_SCAN_X,
150 .scan_type = {
151 .sign = 'u',
152 .realbits = 16,
153 .storagebits = 16,
154 .endianness = IIO_LE,
155 },
156 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
157 .modified = 0,
158 },
159 {
160 .type = IIO_TEMP,
161 .channel2 = IIO_NO_MOD,
162 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
163 .scan_index = -1,
164 .scan_type = {
165 .sign = 'u',
166 .realbits = 16,
167 .storagebits = 16,
168 .endianness = IIO_LE,
169 },
170 .info_mask_separate =
171 BIT(IIO_CHAN_INFO_RAW) |
172 BIT(IIO_CHAN_INFO_OFFSET),
173 .modified = 0,
174 },
175 IIO_CHAN_SOFT_TIMESTAMP(1)
176 };
177
178 static const struct st_sensor_settings st_press_sensors_settings[] = {
179 {
180 .wai = ST_PRESS_LPS331AP_WAI_EXP,
181 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
182 .sensors_supported = {
183 [0] = LPS331AP_PRESS_DEV_NAME,
184 },
185 .ch = (struct iio_chan_spec *)st_press_1_channels,
186 .num_ch = ARRAY_SIZE(st_press_1_channels),
187 .odr = {
188 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
189 .mask = ST_PRESS_LPS331AP_ODR_MASK,
190 .odr_avl = {
191 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
192 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
193 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
194 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
195 },
196 },
197 .pw = {
198 .addr = ST_PRESS_LPS331AP_PW_ADDR,
199 .mask = ST_PRESS_LPS331AP_PW_MASK,
200 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
201 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
202 },
203 .fs = {
204 .addr = ST_PRESS_LPS331AP_FS_ADDR,
205 .mask = ST_PRESS_LPS331AP_FS_MASK,
206 .fs_avl = {
207 [0] = {
208 .num = ST_PRESS_FS_AVL_1260MB,
209 .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
210 .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
211 .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
212 },
213 },
214 },
215 .bdu = {
216 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
217 .mask = ST_PRESS_LPS331AP_BDU_MASK,
218 },
219 .drdy_irq = {
220 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
221 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
222 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
223 },
224 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
225 .bootime = 2,
226 },
227 {
228 .wai = ST_PRESS_LPS001WP_WAI_EXP,
229 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
230 .sensors_supported = {
231 [0] = LPS001WP_PRESS_DEV_NAME,
232 },
233 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
234 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
235 .odr = {
236 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
237 .mask = ST_PRESS_LPS001WP_ODR_MASK,
238 .odr_avl = {
239 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
240 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
241 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
242 },
243 },
244 .pw = {
245 .addr = ST_PRESS_LPS001WP_PW_ADDR,
246 .mask = ST_PRESS_LPS001WP_PW_MASK,
247 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
248 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
249 },
250 .fs = {
251 .addr = 0,
252 },
253 .bdu = {
254 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
255 .mask = ST_PRESS_LPS001WP_BDU_MASK,
256 },
257 .drdy_irq = {
258 .addr = 0,
259 },
260 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
261 .bootime = 2,
262 },
263 {
264 .wai = ST_PRESS_LPS25H_WAI_EXP,
265 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
266 .sensors_supported = {
267 [0] = LPS25H_PRESS_DEV_NAME,
268 },
269 .ch = (struct iio_chan_spec *)st_press_1_channels,
270 .num_ch = ARRAY_SIZE(st_press_1_channels),
271 .odr = {
272 .addr = ST_PRESS_LPS25H_ODR_ADDR,
273 .mask = ST_PRESS_LPS25H_ODR_MASK,
274 .odr_avl = {
275 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
276 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
277 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
278 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
279 },
280 },
281 .pw = {
282 .addr = ST_PRESS_LPS25H_PW_ADDR,
283 .mask = ST_PRESS_LPS25H_PW_MASK,
284 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
285 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
286 },
287 .fs = {
288 .addr = ST_PRESS_LPS25H_FS_ADDR,
289 .mask = ST_PRESS_LPS25H_FS_MASK,
290 .fs_avl = {
291 [0] = {
292 .num = ST_PRESS_FS_AVL_1260MB,
293 .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
294 .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
295 .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
296 },
297 },
298 },
299 .bdu = {
300 .addr = ST_PRESS_LPS25H_BDU_ADDR,
301 .mask = ST_PRESS_LPS25H_BDU_MASK,
302 },
303 .drdy_irq = {
304 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
305 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
306 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
307 },
308 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
309 .bootime = 2,
310 },
311 };
312
313 static int st_press_write_raw(struct iio_dev *indio_dev,
314 struct iio_chan_spec const *ch,
315 int val,
316 int val2,
317 long mask)
318 {
319 int err;
320
321 switch (mask) {
322 case IIO_CHAN_INFO_SAMP_FREQ:
323 if (val2)
324 return -EINVAL;
325 mutex_lock(&indio_dev->mlock);
326 err = st_sensors_set_odr(indio_dev, val);
327 mutex_unlock(&indio_dev->mlock);
328 return err;
329 default:
330 return -EINVAL;
331 }
332 }
333
334 static int st_press_read_raw(struct iio_dev *indio_dev,
335 struct iio_chan_spec const *ch, int *val,
336 int *val2, long mask)
337 {
338 int err;
339 struct st_sensor_data *press_data = iio_priv(indio_dev);
340
341 switch (mask) {
342 case IIO_CHAN_INFO_RAW:
343 err = st_sensors_read_info_raw(indio_dev, ch, val);
344 if (err < 0)
345 goto read_error;
346
347 return IIO_VAL_INT;
348 case IIO_CHAN_INFO_SCALE:
349 *val = 0;
350
351 switch (ch->type) {
352 case IIO_PRESSURE:
353 *val2 = press_data->current_fullscale->gain;
354 break;
355 case IIO_TEMP:
356 *val2 = press_data->current_fullscale->gain2;
357 break;
358 default:
359 err = -EINVAL;
360 goto read_error;
361 }
362
363 return IIO_VAL_INT_PLUS_NANO;
364 case IIO_CHAN_INFO_OFFSET:
365 switch (ch->type) {
366 case IIO_TEMP:
367 *val = 425;
368 *val2 = 10;
369 break;
370 default:
371 err = -EINVAL;
372 goto read_error;
373 }
374
375 return IIO_VAL_FRACTIONAL;
376 case IIO_CHAN_INFO_SAMP_FREQ:
377 *val = press_data->odr;
378 return IIO_VAL_INT;
379 default:
380 return -EINVAL;
381 }
382
383 read_error:
384 return err;
385 }
386
387 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
388
389 static struct attribute *st_press_attributes[] = {
390 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
391 NULL,
392 };
393
394 static const struct attribute_group st_press_attribute_group = {
395 .attrs = st_press_attributes,
396 };
397
398 static const struct iio_info press_info = {
399 .driver_module = THIS_MODULE,
400 .attrs = &st_press_attribute_group,
401 .read_raw = &st_press_read_raw,
402 .write_raw = &st_press_write_raw,
403 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
404 };
405
406 #ifdef CONFIG_IIO_TRIGGER
407 static const struct iio_trigger_ops st_press_trigger_ops = {
408 .owner = THIS_MODULE,
409 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
410 };
411 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
412 #else
413 #define ST_PRESS_TRIGGER_OPS NULL
414 #endif
415
416 int st_press_common_probe(struct iio_dev *indio_dev)
417 {
418 struct st_sensor_data *press_data = iio_priv(indio_dev);
419 int irq = press_data->get_irq_data_ready(indio_dev);
420 int err;
421
422 indio_dev->modes = INDIO_DIRECT_MODE;
423 indio_dev->info = &press_info;
424 mutex_init(&press_data->tb.buf_lock);
425
426 st_sensors_power_enable(indio_dev);
427
428 err = st_sensors_check_device_support(indio_dev,
429 ARRAY_SIZE(st_press_sensors_settings),
430 st_press_sensors_settings);
431 if (err < 0)
432 return err;
433
434 press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
435 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
436 indio_dev->channels = press_data->sensor_settings->ch;
437 indio_dev->num_channels = press_data->sensor_settings->num_ch;
438
439 if (press_data->sensor_settings->fs.addr != 0)
440 press_data->current_fullscale =
441 (struct st_sensor_fullscale_avl *)
442 &press_data->sensor_settings->fs.fs_avl[0];
443
444 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
445
446 /* Some devices don't support a data ready pin. */
447 if (!press_data->dev->platform_data &&
448 press_data->sensor_settings->drdy_irq.addr)
449 press_data->dev->platform_data =
450 (struct st_sensors_platform_data *)&default_press_pdata;
451
452 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
453 if (err < 0)
454 return err;
455
456 err = st_press_allocate_ring(indio_dev);
457 if (err < 0)
458 return err;
459
460 if (irq > 0) {
461 err = st_sensors_allocate_trigger(indio_dev,
462 ST_PRESS_TRIGGER_OPS);
463 if (err < 0)
464 goto st_press_probe_trigger_error;
465 }
466
467 err = iio_device_register(indio_dev);
468 if (err)
469 goto st_press_device_register_error;
470
471 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
472 indio_dev->name);
473
474 return err;
475
476 st_press_device_register_error:
477 if (irq > 0)
478 st_sensors_deallocate_trigger(indio_dev);
479 st_press_probe_trigger_error:
480 st_press_deallocate_ring(indio_dev);
481
482 return err;
483 }
484 EXPORT_SYMBOL(st_press_common_probe);
485
486 void st_press_common_remove(struct iio_dev *indio_dev)
487 {
488 struct st_sensor_data *press_data = iio_priv(indio_dev);
489
490 st_sensors_power_disable(indio_dev);
491
492 iio_device_unregister(indio_dev);
493 if (press_data->get_irq_data_ready(indio_dev) > 0)
494 st_sensors_deallocate_trigger(indio_dev);
495
496 st_press_deallocate_ring(indio_dev);
497 }
498 EXPORT_SYMBOL(st_press_common_remove);
499
500 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
501 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
502 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support