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bd7fe5b7 | 1 | /* |
8ecbb3c3 LP |
2 | * 3-axis accelerometer driver supporting following Bosch-Sensortec chips: |
3 | * - BMC150 | |
4 | * - BMI055 | |
5 | * - BMA255 | |
6 | * - BMA250E | |
7 | * - BMA222E | |
8 | * - BMA280 | |
9 | * | |
bd7fe5b7 SP |
10 | * Copyright (c) 2014, Intel Corporation. |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms and conditions of the GNU General Public License, | |
14 | * version 2, as published by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
19 | * more details. | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/acpi.h> | |
28 | #include <linux/gpio/consumer.h> | |
29 | #include <linux/pm.h> | |
30 | #include <linux/pm_runtime.h> | |
31 | #include <linux/iio/iio.h> | |
32 | #include <linux/iio/sysfs.h> | |
33 | #include <linux/iio/buffer.h> | |
34 | #include <linux/iio/events.h> | |
35 | #include <linux/iio/trigger.h> | |
36 | #include <linux/iio/trigger_consumer.h> | |
37 | #include <linux/iio/triggered_buffer.h> | |
4011eda6 | 38 | #include <linux/regmap.h> |
bd7fe5b7 | 39 | |
55637c38 MP |
40 | #include "bmc150-accel.h" |
41 | ||
bd7fe5b7 SP |
42 | #define BMC150_ACCEL_DRV_NAME "bmc150_accel" |
43 | #define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event" | |
bd7fe5b7 SP |
44 | |
45 | #define BMC150_ACCEL_REG_CHIP_ID 0x00 | |
bd7fe5b7 SP |
46 | |
47 | #define BMC150_ACCEL_REG_INT_STATUS_2 0x0B | |
48 | #define BMC150_ACCEL_ANY_MOTION_MASK 0x07 | |
8d5a9781 SP |
49 | #define BMC150_ACCEL_ANY_MOTION_BIT_X BIT(0) |
50 | #define BMC150_ACCEL_ANY_MOTION_BIT_Y BIT(1) | |
51 | #define BMC150_ACCEL_ANY_MOTION_BIT_Z BIT(2) | |
bd7fe5b7 SP |
52 | #define BMC150_ACCEL_ANY_MOTION_BIT_SIGN BIT(3) |
53 | ||
54 | #define BMC150_ACCEL_REG_PMU_LPW 0x11 | |
55 | #define BMC150_ACCEL_PMU_MODE_MASK 0xE0 | |
56 | #define BMC150_ACCEL_PMU_MODE_SHIFT 5 | |
57 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK 0x17 | |
58 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT 1 | |
59 | ||
60 | #define BMC150_ACCEL_REG_PMU_RANGE 0x0F | |
61 | ||
62 | #define BMC150_ACCEL_DEF_RANGE_2G 0x03 | |
63 | #define BMC150_ACCEL_DEF_RANGE_4G 0x05 | |
64 | #define BMC150_ACCEL_DEF_RANGE_8G 0x08 | |
65 | #define BMC150_ACCEL_DEF_RANGE_16G 0x0C | |
66 | ||
67 | /* Default BW: 125Hz */ | |
68 | #define BMC150_ACCEL_REG_PMU_BW 0x10 | |
69 | #define BMC150_ACCEL_DEF_BW 125 | |
70 | ||
71 | #define BMC150_ACCEL_REG_INT_MAP_0 0x19 | |
72 | #define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2) | |
73 | ||
74 | #define BMC150_ACCEL_REG_INT_MAP_1 0x1A | |
3bbec977 OP |
75 | #define BMC150_ACCEL_INT_MAP_1_BIT_DATA BIT(0) |
76 | #define BMC150_ACCEL_INT_MAP_1_BIT_FWM BIT(1) | |
77 | #define BMC150_ACCEL_INT_MAP_1_BIT_FFULL BIT(2) | |
bd7fe5b7 SP |
78 | |
79 | #define BMC150_ACCEL_REG_INT_RST_LATCH 0x21 | |
80 | #define BMC150_ACCEL_INT_MODE_LATCH_RESET 0x80 | |
81 | #define BMC150_ACCEL_INT_MODE_LATCH_INT 0x0F | |
82 | #define BMC150_ACCEL_INT_MODE_NON_LATCH_INT 0x00 | |
83 | ||
84 | #define BMC150_ACCEL_REG_INT_EN_0 0x16 | |
85 | #define BMC150_ACCEL_INT_EN_BIT_SLP_X BIT(0) | |
86 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Y BIT(1) | |
87 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Z BIT(2) | |
88 | ||
89 | #define BMC150_ACCEL_REG_INT_EN_1 0x17 | |
3bbec977 OP |
90 | #define BMC150_ACCEL_INT_EN_BIT_DATA_EN BIT(4) |
91 | #define BMC150_ACCEL_INT_EN_BIT_FFULL_EN BIT(5) | |
92 | #define BMC150_ACCEL_INT_EN_BIT_FWM_EN BIT(6) | |
bd7fe5b7 SP |
93 | |
94 | #define BMC150_ACCEL_REG_INT_OUT_CTRL 0x20 | |
95 | #define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL BIT(0) | |
96 | ||
97 | #define BMC150_ACCEL_REG_INT_5 0x27 | |
98 | #define BMC150_ACCEL_SLOPE_DUR_MASK 0x03 | |
99 | ||
100 | #define BMC150_ACCEL_REG_INT_6 0x28 | |
101 | #define BMC150_ACCEL_SLOPE_THRES_MASK 0xFF | |
102 | ||
103 | /* Slope duration in terms of number of samples */ | |
9e8e228f | 104 | #define BMC150_ACCEL_DEF_SLOPE_DURATION 1 |
bd7fe5b7 | 105 | /* in terms of multiples of g's/LSB, based on range */ |
9e8e228f | 106 | #define BMC150_ACCEL_DEF_SLOPE_THRESHOLD 1 |
bd7fe5b7 SP |
107 | |
108 | #define BMC150_ACCEL_REG_XOUT_L 0x02 | |
109 | ||
110 | #define BMC150_ACCEL_MAX_STARTUP_TIME_MS 100 | |
111 | ||
112 | /* Sleep Duration values */ | |
113 | #define BMC150_ACCEL_SLEEP_500_MICRO 0x05 | |
114 | #define BMC150_ACCEL_SLEEP_1_MS 0x06 | |
115 | #define BMC150_ACCEL_SLEEP_2_MS 0x07 | |
116 | #define BMC150_ACCEL_SLEEP_4_MS 0x08 | |
117 | #define BMC150_ACCEL_SLEEP_6_MS 0x09 | |
118 | #define BMC150_ACCEL_SLEEP_10_MS 0x0A | |
119 | #define BMC150_ACCEL_SLEEP_25_MS 0x0B | |
120 | #define BMC150_ACCEL_SLEEP_50_MS 0x0C | |
121 | #define BMC150_ACCEL_SLEEP_100_MS 0x0D | |
122 | #define BMC150_ACCEL_SLEEP_500_MS 0x0E | |
123 | #define BMC150_ACCEL_SLEEP_1_SEC 0x0F | |
124 | ||
125 | #define BMC150_ACCEL_REG_TEMP 0x08 | |
126 | #define BMC150_ACCEL_TEMP_CENTER_VAL 24 | |
127 | ||
128 | #define BMC150_ACCEL_AXIS_TO_REG(axis) (BMC150_ACCEL_REG_XOUT_L + (axis * 2)) | |
129 | #define BMC150_AUTO_SUSPEND_DELAY_MS 2000 | |
130 | ||
3bbec977 OP |
131 | #define BMC150_ACCEL_REG_FIFO_STATUS 0x0E |
132 | #define BMC150_ACCEL_REG_FIFO_CONFIG0 0x30 | |
133 | #define BMC150_ACCEL_REG_FIFO_CONFIG1 0x3E | |
134 | #define BMC150_ACCEL_REG_FIFO_DATA 0x3F | |
135 | #define BMC150_ACCEL_FIFO_LENGTH 32 | |
136 | ||
bd7fe5b7 SP |
137 | enum bmc150_accel_axis { |
138 | AXIS_X, | |
139 | AXIS_Y, | |
140 | AXIS_Z, | |
141 | }; | |
142 | ||
143 | enum bmc150_power_modes { | |
144 | BMC150_ACCEL_SLEEP_MODE_NORMAL, | |
145 | BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, | |
146 | BMC150_ACCEL_SLEEP_MODE_LPM, | |
147 | BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04, | |
148 | }; | |
149 | ||
8ecbb3c3 LP |
150 | struct bmc150_scale_info { |
151 | int scale; | |
152 | u8 reg_range; | |
153 | }; | |
154 | ||
155 | struct bmc150_accel_chip_info { | |
0ad4bf37 | 156 | const char *name; |
8ecbb3c3 LP |
157 | u8 chip_id; |
158 | const struct iio_chan_spec *channels; | |
159 | int num_channels; | |
160 | const struct bmc150_scale_info scale_table[4]; | |
161 | }; | |
162 | ||
3e825ec9 OP |
163 | struct bmc150_accel_interrupt { |
164 | const struct bmc150_accel_interrupt_info *info; | |
165 | atomic_t users; | |
166 | }; | |
167 | ||
7d963215 OP |
168 | struct bmc150_accel_trigger { |
169 | struct bmc150_accel_data *data; | |
170 | struct iio_trigger *indio_trig; | |
171 | int (*setup)(struct bmc150_accel_trigger *t, bool state); | |
172 | int intr; | |
173 | bool enabled; | |
174 | }; | |
175 | ||
3e825ec9 OP |
176 | enum bmc150_accel_interrupt_id { |
177 | BMC150_ACCEL_INT_DATA_READY, | |
178 | BMC150_ACCEL_INT_ANY_MOTION, | |
179 | BMC150_ACCEL_INT_WATERMARK, | |
180 | BMC150_ACCEL_INTERRUPTS, | |
181 | }; | |
182 | ||
7d963215 OP |
183 | enum bmc150_accel_trigger_id { |
184 | BMC150_ACCEL_TRIGGER_DATA_READY, | |
185 | BMC150_ACCEL_TRIGGER_ANY_MOTION, | |
186 | BMC150_ACCEL_TRIGGERS, | |
187 | }; | |
188 | ||
bd7fe5b7 | 189 | struct bmc150_accel_data { |
4011eda6 MP |
190 | struct regmap *regmap; |
191 | struct device *dev; | |
19c95d63 | 192 | int irq; |
3e825ec9 | 193 | struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS]; |
3e825ec9 | 194 | atomic_t active_intr; |
7d963215 | 195 | struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS]; |
bd7fe5b7 | 196 | struct mutex mutex; |
3bbec977 | 197 | u8 fifo_mode, watermark; |
bd7fe5b7 SP |
198 | s16 buffer[8]; |
199 | u8 bw_bits; | |
200 | u32 slope_dur; | |
201 | u32 slope_thres; | |
202 | u32 range; | |
203 | int ev_enable_state; | |
c16bff48 | 204 | int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */ |
8ecbb3c3 | 205 | const struct bmc150_accel_chip_info *chip_info; |
bd7fe5b7 SP |
206 | }; |
207 | ||
208 | static const struct { | |
209 | int val; | |
210 | int val2; | |
211 | u8 bw_bits; | |
0ba8da96 SK |
212 | } bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08}, |
213 | {31, 260000, 0x09}, | |
214 | {62, 500000, 0x0A}, | |
215 | {125, 0, 0x0B}, | |
216 | {250, 0, 0x0C}, | |
217 | {500, 0, 0x0D}, | |
218 | {1000, 0, 0x0E}, | |
219 | {2000, 0, 0x0F} }; | |
bd7fe5b7 SP |
220 | |
221 | static const struct { | |
222 | int bw_bits; | |
223 | int msec; | |
224 | } bmc150_accel_sample_upd_time[] = { {0x08, 64}, | |
225 | {0x09, 32}, | |
226 | {0x0A, 16}, | |
227 | {0x0B, 8}, | |
228 | {0x0C, 4}, | |
229 | {0x0D, 2}, | |
230 | {0x0E, 1}, | |
231 | {0x0F, 1} }; | |
232 | ||
bd7fe5b7 SP |
233 | static const struct { |
234 | int sleep_dur; | |
8ecbb3c3 | 235 | u8 reg_value; |
bd7fe5b7 SP |
236 | } bmc150_accel_sleep_value_table[] = { {0, 0}, |
237 | {500, BMC150_ACCEL_SLEEP_500_MICRO}, | |
238 | {1000, BMC150_ACCEL_SLEEP_1_MS}, | |
239 | {2000, BMC150_ACCEL_SLEEP_2_MS}, | |
240 | {4000, BMC150_ACCEL_SLEEP_4_MS}, | |
241 | {6000, BMC150_ACCEL_SLEEP_6_MS}, | |
242 | {10000, BMC150_ACCEL_SLEEP_10_MS}, | |
243 | {25000, BMC150_ACCEL_SLEEP_25_MS}, | |
244 | {50000, BMC150_ACCEL_SLEEP_50_MS}, | |
245 | {100000, BMC150_ACCEL_SLEEP_100_MS}, | |
246 | {500000, BMC150_ACCEL_SLEEP_500_MS}, | |
247 | {1000000, BMC150_ACCEL_SLEEP_1_SEC} }; | |
248 | ||
4011eda6 MP |
249 | static const struct regmap_config bmc150_i2c_regmap_conf = { |
250 | .reg_bits = 8, | |
251 | .val_bits = 8, | |
252 | .max_register = 0x3f, | |
253 | }; | |
254 | ||
bd7fe5b7 SP |
255 | static int bmc150_accel_set_mode(struct bmc150_accel_data *data, |
256 | enum bmc150_power_modes mode, | |
257 | int dur_us) | |
258 | { | |
259 | int i; | |
260 | int ret; | |
261 | u8 lpw_bits; | |
262 | int dur_val = -1; | |
263 | ||
264 | if (dur_us > 0) { | |
265 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table); | |
266 | ++i) { | |
267 | if (bmc150_accel_sleep_value_table[i].sleep_dur == | |
268 | dur_us) | |
269 | dur_val = | |
270 | bmc150_accel_sleep_value_table[i].reg_value; | |
271 | } | |
e20008ed | 272 | } else { |
bd7fe5b7 | 273 | dur_val = 0; |
e20008ed | 274 | } |
bd7fe5b7 SP |
275 | |
276 | if (dur_val < 0) | |
277 | return -EINVAL; | |
278 | ||
279 | lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT; | |
280 | lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT); | |
281 | ||
19c95d63 | 282 | dev_dbg(data->dev, "Set Mode bits %x\n", lpw_bits); |
bd7fe5b7 | 283 | |
4011eda6 | 284 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_LPW, lpw_bits); |
bd7fe5b7 | 285 | if (ret < 0) { |
19c95d63 | 286 | dev_err(data->dev, "Error writing reg_pmu_lpw\n"); |
bd7fe5b7 SP |
287 | return ret; |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val, | |
294 | int val2) | |
295 | { | |
296 | int i; | |
297 | int ret; | |
298 | ||
299 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { | |
300 | if (bmc150_accel_samp_freq_table[i].val == val && | |
e20008ed | 301 | bmc150_accel_samp_freq_table[i].val2 == val2) { |
4011eda6 | 302 | ret = regmap_write(data->regmap, |
bd7fe5b7 SP |
303 | BMC150_ACCEL_REG_PMU_BW, |
304 | bmc150_accel_samp_freq_table[i].bw_bits); | |
305 | if (ret < 0) | |
306 | return ret; | |
307 | ||
308 | data->bw_bits = | |
309 | bmc150_accel_samp_freq_table[i].bw_bits; | |
310 | return 0; | |
311 | } | |
312 | } | |
313 | ||
314 | return -EINVAL; | |
315 | } | |
316 | ||
802a3aef OP |
317 | static int bmc150_accel_update_slope(struct bmc150_accel_data *data) |
318 | { | |
4011eda6 | 319 | int ret; |
802a3aef | 320 | |
4011eda6 | 321 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_6, |
802a3aef OP |
322 | data->slope_thres); |
323 | if (ret < 0) { | |
19c95d63 | 324 | dev_err(data->dev, "Error writing reg_int_6\n"); |
802a3aef OP |
325 | return ret; |
326 | } | |
327 | ||
4011eda6 MP |
328 | ret = regmap_update_bits(data->regmap, BMC150_ACCEL_REG_INT_5, |
329 | BMC150_ACCEL_SLOPE_DUR_MASK, data->slope_dur); | |
802a3aef | 330 | if (ret < 0) { |
19c95d63 | 331 | dev_err(data->dev, "Error updating reg_int_5\n"); |
802a3aef OP |
332 | return ret; |
333 | } | |
334 | ||
19c95d63 | 335 | dev_dbg(data->dev, "%s: %x %x\n", __func__, data->slope_thres, |
802a3aef OP |
336 | data->slope_dur); |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
7d963215 OP |
341 | static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t, |
342 | bool state) | |
343 | { | |
344 | if (state) | |
345 | return bmc150_accel_update_slope(t->data); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
bd7fe5b7 SP |
350 | static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val, |
351 | int *val2) | |
352 | { | |
353 | int i; | |
354 | ||
355 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { | |
356 | if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) { | |
357 | *val = bmc150_accel_samp_freq_table[i].val; | |
358 | *val2 = bmc150_accel_samp_freq_table[i].val2; | |
359 | return IIO_VAL_INT_PLUS_MICRO; | |
360 | } | |
361 | } | |
362 | ||
363 | return -EINVAL; | |
364 | } | |
365 | ||
6f0a13f2 | 366 | #ifdef CONFIG_PM |
bd7fe5b7 SP |
367 | static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data) |
368 | { | |
369 | int i; | |
370 | ||
371 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) { | |
372 | if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits) | |
373 | return bmc150_accel_sample_upd_time[i].msec; | |
374 | } | |
375 | ||
376 | return BMC150_ACCEL_MAX_STARTUP_TIME_MS; | |
377 | } | |
378 | ||
379 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) | |
380 | { | |
381 | int ret; | |
382 | ||
e20008ed | 383 | if (on) { |
19c95d63 | 384 | ret = pm_runtime_get_sync(data->dev); |
e20008ed | 385 | } else { |
19c95d63 MP |
386 | pm_runtime_mark_last_busy(data->dev); |
387 | ret = pm_runtime_put_autosuspend(data->dev); | |
bd7fe5b7 | 388 | } |
e20008ed | 389 | |
bd7fe5b7 | 390 | if (ret < 0) { |
19c95d63 | 391 | dev_err(data->dev, |
bd7fe5b7 | 392 | "Failed: bmc150_accel_set_power_state for %d\n", on); |
aaeecd80 | 393 | if (on) |
19c95d63 | 394 | pm_runtime_put_noidle(data->dev); |
aaeecd80 | 395 | |
bd7fe5b7 SP |
396 | return ret; |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
b31b05cf LP |
401 | #else |
402 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) | |
403 | { | |
404 | return 0; | |
405 | } | |
406 | #endif | |
bd7fe5b7 | 407 | |
8e22f477 OP |
408 | static const struct bmc150_accel_interrupt_info { |
409 | u8 map_reg; | |
410 | u8 map_bitmask; | |
411 | u8 en_reg; | |
412 | u8 en_bitmask; | |
3e825ec9 | 413 | } bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = { |
8e22f477 OP |
414 | { /* data ready interrupt */ |
415 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, | |
416 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA, | |
417 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, | |
418 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN, | |
419 | }, | |
420 | { /* motion interrupt */ | |
421 | .map_reg = BMC150_ACCEL_REG_INT_MAP_0, | |
422 | .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE, | |
423 | .en_reg = BMC150_ACCEL_REG_INT_EN_0, | |
424 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X | | |
425 | BMC150_ACCEL_INT_EN_BIT_SLP_Y | | |
426 | BMC150_ACCEL_INT_EN_BIT_SLP_Z | |
427 | }, | |
3bbec977 OP |
428 | { /* fifo watermark interrupt */ |
429 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, | |
430 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM, | |
431 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, | |
432 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN, | |
433 | }, | |
8e22f477 OP |
434 | }; |
435 | ||
3e825ec9 OP |
436 | static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev, |
437 | struct bmc150_accel_data *data) | |
438 | { | |
439 | int i; | |
440 | ||
441 | for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++) | |
442 | data->interrupts[i].info = &bmc150_accel_interrupts[i]; | |
443 | } | |
444 | ||
445 | static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i, | |
8e22f477 OP |
446 | bool state) |
447 | { | |
3e825ec9 OP |
448 | struct bmc150_accel_interrupt *intr = &data->interrupts[i]; |
449 | const struct bmc150_accel_interrupt_info *info = intr->info; | |
8e22f477 OP |
450 | int ret; |
451 | ||
3e825ec9 OP |
452 | if (state) { |
453 | if (atomic_inc_return(&intr->users) > 1) | |
454 | return 0; | |
455 | } else { | |
456 | if (atomic_dec_return(&intr->users) > 0) | |
457 | return 0; | |
458 | } | |
459 | ||
8e22f477 | 460 | /* |
e20008ed HK |
461 | * We will expect the enable and disable to do operation in reverse |
462 | * order. This will happen here anyway, as our resume operation uses | |
463 | * sync mode runtime pm calls. The suspend operation will be delayed | |
464 | * by autosuspend delay. | |
465 | * So the disable operation will still happen in reverse order of | |
466 | * enable operation. When runtime pm is disabled the mode is always on, | |
467 | * so sequence doesn't matter. | |
8e22f477 OP |
468 | */ |
469 | ret = bmc150_accel_set_power_state(data, state); | |
470 | if (ret < 0) | |
471 | return ret; | |
472 | ||
473 | /* map the interrupt to the appropriate pins */ | |
4011eda6 MP |
474 | ret = regmap_update_bits(data->regmap, info->map_reg, info->map_bitmask, |
475 | (state ? info->map_bitmask : 0)); | |
8e22f477 | 476 | if (ret < 0) { |
19c95d63 | 477 | dev_err(data->dev, "Error updating reg_int_map\n"); |
8e22f477 OP |
478 | goto out_fix_power_state; |
479 | } | |
480 | ||
481 | /* enable/disable the interrupt */ | |
4011eda6 MP |
482 | ret = regmap_update_bits(data->regmap, info->en_reg, info->en_bitmask, |
483 | (state ? info->en_bitmask : 0)); | |
8e22f477 | 484 | if (ret < 0) { |
19c95d63 | 485 | dev_err(data->dev, "Error updating reg_int_en\n"); |
8e22f477 OP |
486 | goto out_fix_power_state; |
487 | } | |
488 | ||
3e825ec9 OP |
489 | if (state) |
490 | atomic_inc(&data->active_intr); | |
491 | else | |
492 | atomic_dec(&data->active_intr); | |
493 | ||
8e22f477 OP |
494 | return 0; |
495 | ||
496 | out_fix_power_state: | |
497 | bmc150_accel_set_power_state(data, false); | |
498 | return ret; | |
499 | } | |
500 | ||
bd7fe5b7 SP |
501 | static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) |
502 | { | |
503 | int ret, i; | |
504 | ||
8ecbb3c3 LP |
505 | for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) { |
506 | if (data->chip_info->scale_table[i].scale == val) { | |
4011eda6 | 507 | ret = regmap_write(data->regmap, |
8ecbb3c3 LP |
508 | BMC150_ACCEL_REG_PMU_RANGE, |
509 | data->chip_info->scale_table[i].reg_range); | |
bd7fe5b7 | 510 | if (ret < 0) { |
19c95d63 | 511 | dev_err(data->dev, |
bd7fe5b7 SP |
512 | "Error writing pmu_range\n"); |
513 | return ret; | |
514 | } | |
515 | ||
8ecbb3c3 | 516 | data->range = data->chip_info->scale_table[i].reg_range; |
bd7fe5b7 SP |
517 | return 0; |
518 | } | |
519 | } | |
520 | ||
521 | return -EINVAL; | |
522 | } | |
523 | ||
524 | static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val) | |
525 | { | |
526 | int ret; | |
4011eda6 | 527 | unsigned int value; |
bd7fe5b7 SP |
528 | |
529 | mutex_lock(&data->mutex); | |
530 | ||
4011eda6 | 531 | ret = regmap_read(data->regmap, BMC150_ACCEL_REG_TEMP, &value); |
bd7fe5b7 | 532 | if (ret < 0) { |
19c95d63 | 533 | dev_err(data->dev, "Error reading reg_temp\n"); |
bd7fe5b7 SP |
534 | mutex_unlock(&data->mutex); |
535 | return ret; | |
536 | } | |
4011eda6 | 537 | *val = sign_extend32(value, 7); |
bd7fe5b7 SP |
538 | |
539 | mutex_unlock(&data->mutex); | |
540 | ||
541 | return IIO_VAL_INT; | |
542 | } | |
543 | ||
8ecbb3c3 LP |
544 | static int bmc150_accel_get_axis(struct bmc150_accel_data *data, |
545 | struct iio_chan_spec const *chan, | |
bd7fe5b7 SP |
546 | int *val) |
547 | { | |
548 | int ret; | |
8ecbb3c3 | 549 | int axis = chan->scan_index; |
4011eda6 | 550 | unsigned int raw_val; |
bd7fe5b7 SP |
551 | |
552 | mutex_lock(&data->mutex); | |
553 | ret = bmc150_accel_set_power_state(data, true); | |
554 | if (ret < 0) { | |
555 | mutex_unlock(&data->mutex); | |
556 | return ret; | |
557 | } | |
558 | ||
4011eda6 MP |
559 | ret = regmap_bulk_read(data->regmap, BMC150_ACCEL_AXIS_TO_REG(axis), |
560 | &raw_val, 2); | |
bd7fe5b7 | 561 | if (ret < 0) { |
19c95d63 | 562 | dev_err(data->dev, "Error reading axis %d\n", axis); |
bd7fe5b7 SP |
563 | bmc150_accel_set_power_state(data, false); |
564 | mutex_unlock(&data->mutex); | |
565 | return ret; | |
566 | } | |
4011eda6 | 567 | *val = sign_extend32(raw_val >> chan->scan_type.shift, |
8ecbb3c3 | 568 | chan->scan_type.realbits - 1); |
bd7fe5b7 SP |
569 | ret = bmc150_accel_set_power_state(data, false); |
570 | mutex_unlock(&data->mutex); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | ||
574 | return IIO_VAL_INT; | |
575 | } | |
576 | ||
577 | static int bmc150_accel_read_raw(struct iio_dev *indio_dev, | |
578 | struct iio_chan_spec const *chan, | |
579 | int *val, int *val2, long mask) | |
580 | { | |
581 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
582 | int ret; | |
583 | ||
584 | switch (mask) { | |
585 | case IIO_CHAN_INFO_RAW: | |
586 | switch (chan->type) { | |
587 | case IIO_TEMP: | |
588 | return bmc150_accel_get_temp(data, val); | |
589 | case IIO_ACCEL: | |
590 | if (iio_buffer_enabled(indio_dev)) | |
591 | return -EBUSY; | |
592 | else | |
8ecbb3c3 | 593 | return bmc150_accel_get_axis(data, chan, val); |
bd7fe5b7 SP |
594 | default: |
595 | return -EINVAL; | |
596 | } | |
597 | case IIO_CHAN_INFO_OFFSET: | |
598 | if (chan->type == IIO_TEMP) { | |
599 | *val = BMC150_ACCEL_TEMP_CENTER_VAL; | |
600 | return IIO_VAL_INT; | |
e20008ed | 601 | } else { |
bd7fe5b7 | 602 | return -EINVAL; |
e20008ed | 603 | } |
bd7fe5b7 SP |
604 | case IIO_CHAN_INFO_SCALE: |
605 | *val = 0; | |
606 | switch (chan->type) { | |
607 | case IIO_TEMP: | |
608 | *val2 = 500000; | |
609 | return IIO_VAL_INT_PLUS_MICRO; | |
610 | case IIO_ACCEL: | |
611 | { | |
612 | int i; | |
8ecbb3c3 LP |
613 | const struct bmc150_scale_info *si; |
614 | int st_size = ARRAY_SIZE(data->chip_info->scale_table); | |
bd7fe5b7 | 615 | |
8ecbb3c3 LP |
616 | for (i = 0; i < st_size; ++i) { |
617 | si = &data->chip_info->scale_table[i]; | |
618 | if (si->reg_range == data->range) { | |
619 | *val2 = si->scale; | |
bd7fe5b7 SP |
620 | return IIO_VAL_INT_PLUS_MICRO; |
621 | } | |
622 | } | |
623 | return -EINVAL; | |
624 | } | |
625 | default: | |
626 | return -EINVAL; | |
627 | } | |
628 | case IIO_CHAN_INFO_SAMP_FREQ: | |
629 | mutex_lock(&data->mutex); | |
630 | ret = bmc150_accel_get_bw(data, val, val2); | |
631 | mutex_unlock(&data->mutex); | |
632 | return ret; | |
633 | default: | |
634 | return -EINVAL; | |
635 | } | |
636 | } | |
637 | ||
638 | static int bmc150_accel_write_raw(struct iio_dev *indio_dev, | |
639 | struct iio_chan_spec const *chan, | |
640 | int val, int val2, long mask) | |
641 | { | |
642 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
643 | int ret; | |
644 | ||
645 | switch (mask) { | |
646 | case IIO_CHAN_INFO_SAMP_FREQ: | |
647 | mutex_lock(&data->mutex); | |
648 | ret = bmc150_accel_set_bw(data, val, val2); | |
649 | mutex_unlock(&data->mutex); | |
650 | break; | |
651 | case IIO_CHAN_INFO_SCALE: | |
652 | if (val) | |
653 | return -EINVAL; | |
654 | ||
655 | mutex_lock(&data->mutex); | |
656 | ret = bmc150_accel_set_scale(data, val2); | |
657 | mutex_unlock(&data->mutex); | |
658 | return ret; | |
659 | default: | |
660 | ret = -EINVAL; | |
661 | } | |
662 | ||
663 | return ret; | |
664 | } | |
665 | ||
666 | static int bmc150_accel_read_event(struct iio_dev *indio_dev, | |
667 | const struct iio_chan_spec *chan, | |
668 | enum iio_event_type type, | |
669 | enum iio_event_direction dir, | |
670 | enum iio_event_info info, | |
671 | int *val, int *val2) | |
672 | { | |
673 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
674 | ||
675 | *val2 = 0; | |
676 | switch (info) { | |
677 | case IIO_EV_INFO_VALUE: | |
678 | *val = data->slope_thres; | |
679 | break; | |
680 | case IIO_EV_INFO_PERIOD: | |
802a3aef | 681 | *val = data->slope_dur; |
bd7fe5b7 SP |
682 | break; |
683 | default: | |
684 | return -EINVAL; | |
685 | } | |
686 | ||
687 | return IIO_VAL_INT; | |
688 | } | |
689 | ||
690 | static int bmc150_accel_write_event(struct iio_dev *indio_dev, | |
691 | const struct iio_chan_spec *chan, | |
692 | enum iio_event_type type, | |
693 | enum iio_event_direction dir, | |
694 | enum iio_event_info info, | |
695 | int val, int val2) | |
696 | { | |
697 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
698 | ||
699 | if (data->ev_enable_state) | |
700 | return -EBUSY; | |
701 | ||
702 | switch (info) { | |
703 | case IIO_EV_INFO_VALUE: | |
fdd15f65 | 704 | data->slope_thres = val & BMC150_ACCEL_SLOPE_THRES_MASK; |
bd7fe5b7 SP |
705 | break; |
706 | case IIO_EV_INFO_PERIOD: | |
802a3aef | 707 | data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK; |
bd7fe5b7 SP |
708 | break; |
709 | default: | |
710 | return -EINVAL; | |
711 | } | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int bmc150_accel_read_event_config(struct iio_dev *indio_dev, | |
717 | const struct iio_chan_spec *chan, | |
718 | enum iio_event_type type, | |
719 | enum iio_event_direction dir) | |
720 | { | |
bd7fe5b7 SP |
721 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
722 | ||
723 | return data->ev_enable_state; | |
724 | } | |
725 | ||
726 | static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, | |
727 | const struct iio_chan_spec *chan, | |
728 | enum iio_event_type type, | |
729 | enum iio_event_direction dir, | |
730 | int state) | |
731 | { | |
732 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
733 | int ret; | |
734 | ||
14ee64f4 | 735 | if (state == data->ev_enable_state) |
bd7fe5b7 SP |
736 | return 0; |
737 | ||
738 | mutex_lock(&data->mutex); | |
739 | ||
3e825ec9 OP |
740 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION, |
741 | state); | |
bd7fe5b7 SP |
742 | if (ret < 0) { |
743 | mutex_unlock(&data->mutex); | |
744 | return ret; | |
745 | } | |
746 | ||
747 | data->ev_enable_state = state; | |
748 | mutex_unlock(&data->mutex); | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
753 | static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev, | |
e20008ed | 754 | struct iio_trigger *trig) |
bd7fe5b7 SP |
755 | { |
756 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
7d963215 | 757 | int i; |
bd7fe5b7 | 758 | |
7d963215 OP |
759 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
760 | if (data->triggers[i].indio_trig == trig) | |
761 | return 0; | |
762 | } | |
bd7fe5b7 | 763 | |
7d963215 | 764 | return -EINVAL; |
bd7fe5b7 SP |
765 | } |
766 | ||
3bbec977 OP |
767 | static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev, |
768 | struct device_attribute *attr, | |
769 | char *buf) | |
770 | { | |
771 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
772 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
773 | int wm; | |
774 | ||
775 | mutex_lock(&data->mutex); | |
776 | wm = data->watermark; | |
777 | mutex_unlock(&data->mutex); | |
778 | ||
779 | return sprintf(buf, "%d\n", wm); | |
780 | } | |
781 | ||
782 | static ssize_t bmc150_accel_get_fifo_state(struct device *dev, | |
783 | struct device_attribute *attr, | |
784 | char *buf) | |
785 | { | |
786 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
787 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
788 | bool state; | |
789 | ||
790 | mutex_lock(&data->mutex); | |
791 | state = data->fifo_mode; | |
792 | mutex_unlock(&data->mutex); | |
793 | ||
794 | return sprintf(buf, "%d\n", state); | |
795 | } | |
796 | ||
797 | static IIO_CONST_ATTR(hwfifo_watermark_min, "1"); | |
798 | static IIO_CONST_ATTR(hwfifo_watermark_max, | |
799 | __stringify(BMC150_ACCEL_FIFO_LENGTH)); | |
800 | static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO, | |
801 | bmc150_accel_get_fifo_state, NULL, 0); | |
802 | static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO, | |
803 | bmc150_accel_get_fifo_watermark, NULL, 0); | |
804 | ||
805 | static const struct attribute *bmc150_accel_fifo_attributes[] = { | |
806 | &iio_const_attr_hwfifo_watermark_min.dev_attr.attr, | |
807 | &iio_const_attr_hwfifo_watermark_max.dev_attr.attr, | |
808 | &iio_dev_attr_hwfifo_watermark.dev_attr.attr, | |
809 | &iio_dev_attr_hwfifo_enabled.dev_attr.attr, | |
810 | NULL, | |
811 | }; | |
812 | ||
813 | static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val) | |
814 | { | |
815 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
816 | ||
817 | if (val > BMC150_ACCEL_FIFO_LENGTH) | |
818 | val = BMC150_ACCEL_FIFO_LENGTH; | |
819 | ||
820 | mutex_lock(&data->mutex); | |
821 | data->watermark = val; | |
822 | mutex_unlock(&data->mutex); | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
827 | /* | |
828 | * We must read at least one full frame in one burst, otherwise the rest of the | |
829 | * frame data is discarded. | |
830 | */ | |
4011eda6 | 831 | static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data, |
3bbec977 OP |
832 | char *buffer, int samples) |
833 | { | |
834 | int sample_length = 3 * 2; | |
4011eda6 MP |
835 | int ret; |
836 | int total_length = samples * sample_length; | |
837 | int i; | |
838 | size_t step = regmap_get_raw_read_max(data->regmap); | |
3bbec977 | 839 | |
4011eda6 MP |
840 | if (!step || step > total_length) |
841 | step = total_length; | |
842 | else if (step < total_length) | |
843 | step = sample_length; | |
3bbec977 | 844 | |
4011eda6 MP |
845 | /* |
846 | * Seems we have a bus with size limitation so we have to execute | |
847 | * multiple reads | |
848 | */ | |
849 | for (i = 0; i < total_length; i += step) { | |
850 | ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA, | |
851 | &buffer[i], step); | |
852 | if (ret) | |
853 | break; | |
3bbec977 OP |
854 | } |
855 | ||
856 | if (ret) | |
4011eda6 MP |
857 | dev_err(data->dev, "Error transferring data from fifo in single steps of %zu\n", |
858 | step); | |
3bbec977 OP |
859 | |
860 | return ret; | |
861 | } | |
862 | ||
863 | static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev, | |
864 | unsigned samples, bool irq) | |
865 | { | |
866 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
867 | int ret, i; | |
868 | u8 count; | |
869 | u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; | |
870 | int64_t tstamp; | |
871 | uint64_t sample_period; | |
4011eda6 | 872 | unsigned int val; |
e20008ed | 873 | |
4011eda6 | 874 | ret = regmap_read(data->regmap, BMC150_ACCEL_REG_FIFO_STATUS, &val); |
3bbec977 | 875 | if (ret < 0) { |
19c95d63 | 876 | dev_err(data->dev, "Error reading reg_fifo_status\n"); |
3bbec977 OP |
877 | return ret; |
878 | } | |
879 | ||
4011eda6 | 880 | count = val & 0x7F; |
3bbec977 OP |
881 | |
882 | if (!count) | |
883 | return 0; | |
884 | ||
885 | /* | |
886 | * If we getting called from IRQ handler we know the stored timestamp is | |
887 | * fairly accurate for the last stored sample. Otherwise, if we are | |
888 | * called as a result of a read operation from userspace and hence | |
889 | * before the watermark interrupt was triggered, take a timestamp | |
890 | * now. We can fall anywhere in between two samples so the error in this | |
891 | * case is at most one sample period. | |
892 | */ | |
893 | if (!irq) { | |
894 | data->old_timestamp = data->timestamp; | |
895 | data->timestamp = iio_get_time_ns(); | |
896 | } | |
897 | ||
898 | /* | |
899 | * Approximate timestamps for each of the sample based on the sampling | |
900 | * frequency, timestamp for last sample and number of samples. | |
901 | * | |
902 | * Note that we can't use the current bandwidth settings to compute the | |
903 | * sample period because the sample rate varies with the device | |
904 | * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That | |
905 | * small variation adds when we store a large number of samples and | |
906 | * creates significant jitter between the last and first samples in | |
907 | * different batches (e.g. 32ms vs 21ms). | |
908 | * | |
909 | * To avoid this issue we compute the actual sample period ourselves | |
910 | * based on the timestamp delta between the last two flush operations. | |
911 | */ | |
912 | sample_period = (data->timestamp - data->old_timestamp); | |
913 | do_div(sample_period, count); | |
914 | tstamp = data->timestamp - (count - 1) * sample_period; | |
915 | ||
916 | if (samples && count > samples) | |
917 | count = samples; | |
918 | ||
4011eda6 | 919 | ret = bmc150_accel_fifo_transfer(data, (u8 *)buffer, count); |
3bbec977 OP |
920 | if (ret) |
921 | return ret; | |
922 | ||
923 | /* | |
924 | * Ideally we want the IIO core to handle the demux when running in fifo | |
925 | * mode but not when running in triggered buffer mode. Unfortunately | |
926 | * this does not seem to be possible, so stick with driver demux for | |
927 | * now. | |
928 | */ | |
929 | for (i = 0; i < count; i++) { | |
930 | u16 sample[8]; | |
931 | int j, bit; | |
932 | ||
933 | j = 0; | |
934 | for_each_set_bit(bit, indio_dev->active_scan_mask, | |
935 | indio_dev->masklength) | |
936 | memcpy(&sample[j++], &buffer[i * 3 + bit], 2); | |
937 | ||
938 | iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp); | |
939 | ||
940 | tstamp += sample_period; | |
941 | } | |
942 | ||
943 | return count; | |
944 | } | |
945 | ||
946 | static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples) | |
947 | { | |
948 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
949 | int ret; | |
950 | ||
951 | mutex_lock(&data->mutex); | |
952 | ret = __bmc150_accel_fifo_flush(indio_dev, samples, false); | |
953 | mutex_unlock(&data->mutex); | |
954 | ||
955 | return ret; | |
956 | } | |
957 | ||
bd7fe5b7 | 958 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( |
0ba8da96 | 959 | "15.620000 31.260000 62.50000 125 250 500 1000 2000"); |
bd7fe5b7 SP |
960 | |
961 | static struct attribute *bmc150_accel_attributes[] = { | |
962 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
963 | NULL, | |
964 | }; | |
965 | ||
966 | static const struct attribute_group bmc150_accel_attrs_group = { | |
967 | .attrs = bmc150_accel_attributes, | |
968 | }; | |
969 | ||
970 | static const struct iio_event_spec bmc150_accel_event = { | |
971 | .type = IIO_EV_TYPE_ROC, | |
1174124c | 972 | .dir = IIO_EV_DIR_EITHER, |
bd7fe5b7 SP |
973 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
974 | BIT(IIO_EV_INFO_ENABLE) | | |
975 | BIT(IIO_EV_INFO_PERIOD) | |
976 | }; | |
977 | ||
8ecbb3c3 | 978 | #define BMC150_ACCEL_CHANNEL(_axis, bits) { \ |
bd7fe5b7 SP |
979 | .type = IIO_ACCEL, \ |
980 | .modified = 1, \ | |
981 | .channel2 = IIO_MOD_##_axis, \ | |
982 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
983 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
984 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
985 | .scan_index = AXIS_##_axis, \ | |
986 | .scan_type = { \ | |
987 | .sign = 's', \ | |
8ecbb3c3 | 988 | .realbits = (bits), \ |
bd7fe5b7 | 989 | .storagebits = 16, \ |
8ecbb3c3 | 990 | .shift = 16 - (bits), \ |
bd7fe5b7 SP |
991 | }, \ |
992 | .event_spec = &bmc150_accel_event, \ | |
993 | .num_event_specs = 1 \ | |
994 | } | |
995 | ||
8ecbb3c3 LP |
996 | #define BMC150_ACCEL_CHANNELS(bits) { \ |
997 | { \ | |
998 | .type = IIO_TEMP, \ | |
999 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
1000 | BIT(IIO_CHAN_INFO_SCALE) | \ | |
1001 | BIT(IIO_CHAN_INFO_OFFSET), \ | |
1002 | .scan_index = -1, \ | |
1003 | }, \ | |
1004 | BMC150_ACCEL_CHANNEL(X, bits), \ | |
1005 | BMC150_ACCEL_CHANNEL(Y, bits), \ | |
1006 | BMC150_ACCEL_CHANNEL(Z, bits), \ | |
1007 | IIO_CHAN_SOFT_TIMESTAMP(3), \ | |
1008 | } | |
1009 | ||
1010 | static const struct iio_chan_spec bma222e_accel_channels[] = | |
1011 | BMC150_ACCEL_CHANNELS(8); | |
1012 | static const struct iio_chan_spec bma250e_accel_channels[] = | |
1013 | BMC150_ACCEL_CHANNELS(10); | |
1014 | static const struct iio_chan_spec bmc150_accel_channels[] = | |
1015 | BMC150_ACCEL_CHANNELS(12); | |
1016 | static const struct iio_chan_spec bma280_accel_channels[] = | |
1017 | BMC150_ACCEL_CHANNELS(14); | |
1018 | ||
8ecbb3c3 LP |
1019 | static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { |
1020 | [bmc150] = { | |
0ad4bf37 | 1021 | .name = "BMC150A", |
8ecbb3c3 LP |
1022 | .chip_id = 0xFA, |
1023 | .channels = bmc150_accel_channels, | |
1024 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1025 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1026 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1027 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1028 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1029 | }, | |
1030 | [bmi055] = { | |
0ad4bf37 | 1031 | .name = "BMI055A", |
8ecbb3c3 LP |
1032 | .chip_id = 0xFA, |
1033 | .channels = bmc150_accel_channels, | |
1034 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1035 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1036 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1037 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1038 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1039 | }, | |
1040 | [bma255] = { | |
0ad4bf37 | 1041 | .name = "BMA0255", |
8ecbb3c3 LP |
1042 | .chip_id = 0xFA, |
1043 | .channels = bmc150_accel_channels, | |
1044 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1045 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1046 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1047 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1048 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1049 | }, | |
1050 | [bma250e] = { | |
0ad4bf37 | 1051 | .name = "BMA250E", |
8ecbb3c3 LP |
1052 | .chip_id = 0xF9, |
1053 | .channels = bma250e_accel_channels, | |
1054 | .num_channels = ARRAY_SIZE(bma250e_accel_channels), | |
1055 | .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, | |
1056 | {76590, BMC150_ACCEL_DEF_RANGE_4G}, | |
1057 | {153277, BMC150_ACCEL_DEF_RANGE_8G}, | |
1058 | {306457, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1059 | }, | |
1060 | [bma222e] = { | |
0ad4bf37 | 1061 | .name = "BMA222E", |
8ecbb3c3 LP |
1062 | .chip_id = 0xF8, |
1063 | .channels = bma222e_accel_channels, | |
1064 | .num_channels = ARRAY_SIZE(bma222e_accel_channels), | |
1065 | .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G}, | |
1066 | {306457, BMC150_ACCEL_DEF_RANGE_4G}, | |
1067 | {612915, BMC150_ACCEL_DEF_RANGE_8G}, | |
1068 | {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1069 | }, | |
1070 | [bma280] = { | |
0ad4bf37 | 1071 | .name = "BMA0280", |
8ecbb3c3 LP |
1072 | .chip_id = 0xFB, |
1073 | .channels = bma280_accel_channels, | |
1074 | .num_channels = ARRAY_SIZE(bma280_accel_channels), | |
1075 | .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G}, | |
1076 | {4785, BMC150_ACCEL_DEF_RANGE_4G}, | |
1077 | {9581, BMC150_ACCEL_DEF_RANGE_8G}, | |
1078 | {19152, BMC150_ACCEL_DEF_RANGE_16G} }, | |
bd7fe5b7 | 1079 | }, |
bd7fe5b7 SP |
1080 | }; |
1081 | ||
1082 | static const struct iio_info bmc150_accel_info = { | |
1083 | .attrs = &bmc150_accel_attrs_group, | |
1084 | .read_raw = bmc150_accel_read_raw, | |
1085 | .write_raw = bmc150_accel_write_raw, | |
1086 | .read_event_value = bmc150_accel_read_event, | |
1087 | .write_event_value = bmc150_accel_write_event, | |
1088 | .write_event_config = bmc150_accel_write_event_config, | |
1089 | .read_event_config = bmc150_accel_read_event_config, | |
bd7fe5b7 SP |
1090 | .driver_module = THIS_MODULE, |
1091 | }; | |
1092 | ||
3bbec977 OP |
1093 | static const struct iio_info bmc150_accel_info_fifo = { |
1094 | .attrs = &bmc150_accel_attrs_group, | |
1095 | .read_raw = bmc150_accel_read_raw, | |
1096 | .write_raw = bmc150_accel_write_raw, | |
1097 | .read_event_value = bmc150_accel_read_event, | |
1098 | .write_event_value = bmc150_accel_write_event, | |
1099 | .write_event_config = bmc150_accel_write_event_config, | |
1100 | .read_event_config = bmc150_accel_read_event_config, | |
1101 | .validate_trigger = bmc150_accel_validate_trigger, | |
1102 | .hwfifo_set_watermark = bmc150_accel_set_watermark, | |
1103 | .hwfifo_flush_to_buffer = bmc150_accel_fifo_flush, | |
1104 | .driver_module = THIS_MODULE, | |
1105 | }; | |
1106 | ||
bd7fe5b7 SP |
1107 | static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p) |
1108 | { | |
1109 | struct iio_poll_func *pf = p; | |
1110 | struct iio_dev *indio_dev = pf->indio_dev; | |
1111 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1112 | int bit, ret, i = 0; | |
4011eda6 | 1113 | unsigned int raw_val; |
bd7fe5b7 SP |
1114 | |
1115 | mutex_lock(&data->mutex); | |
70dddeee | 1116 | for_each_set_bit(bit, indio_dev->active_scan_mask, |
bd7fe5b7 | 1117 | indio_dev->masklength) { |
4011eda6 MP |
1118 | ret = regmap_bulk_read(data->regmap, |
1119 | BMC150_ACCEL_AXIS_TO_REG(bit), &raw_val, | |
1120 | 2); | |
bd7fe5b7 SP |
1121 | if (ret < 0) { |
1122 | mutex_unlock(&data->mutex); | |
1123 | goto err_read; | |
1124 | } | |
4011eda6 | 1125 | data->buffer[i++] = raw_val; |
bd7fe5b7 SP |
1126 | } |
1127 | mutex_unlock(&data->mutex); | |
1128 | ||
1129 | iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, | |
c16bff48 | 1130 | pf->timestamp); |
bd7fe5b7 SP |
1131 | err_read: |
1132 | iio_trigger_notify_done(indio_dev->trig); | |
1133 | ||
1134 | return IRQ_HANDLED; | |
1135 | } | |
1136 | ||
1137 | static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) | |
1138 | { | |
7d963215 OP |
1139 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
1140 | struct bmc150_accel_data *data = t->data; | |
bd7fe5b7 SP |
1141 | int ret; |
1142 | ||
1143 | /* new data interrupts don't need ack */ | |
7d963215 | 1144 | if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY]) |
bd7fe5b7 SP |
1145 | return 0; |
1146 | ||
1147 | mutex_lock(&data->mutex); | |
1148 | /* clear any latched interrupt */ | |
4011eda6 MP |
1149 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, |
1150 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
1151 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
bd7fe5b7 SP |
1152 | mutex_unlock(&data->mutex); |
1153 | if (ret < 0) { | |
19c95d63 | 1154 | dev_err(data->dev, |
bd7fe5b7 SP |
1155 | "Error writing reg_int_rst_latch\n"); |
1156 | return ret; | |
1157 | } | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
7d963215 | 1162 | static int bmc150_accel_trigger_set_state(struct iio_trigger *trig, |
e20008ed | 1163 | bool state) |
bd7fe5b7 | 1164 | { |
7d963215 OP |
1165 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
1166 | struct bmc150_accel_data *data = t->data; | |
bd7fe5b7 SP |
1167 | int ret; |
1168 | ||
1169 | mutex_lock(&data->mutex); | |
1170 | ||
7d963215 OP |
1171 | if (t->enabled == state) { |
1172 | mutex_unlock(&data->mutex); | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | if (t->setup) { | |
1177 | ret = t->setup(t, state); | |
1178 | if (ret < 0) { | |
14ee64f4 | 1179 | mutex_unlock(&data->mutex); |
7d963215 | 1180 | return ret; |
14ee64f4 OP |
1181 | } |
1182 | } | |
1183 | ||
7d963215 | 1184 | ret = bmc150_accel_set_interrupt(data, t->intr, state); |
bd7fe5b7 SP |
1185 | if (ret < 0) { |
1186 | mutex_unlock(&data->mutex); | |
1187 | return ret; | |
1188 | } | |
7d963215 OP |
1189 | |
1190 | t->enabled = state; | |
bd7fe5b7 SP |
1191 | |
1192 | mutex_unlock(&data->mutex); | |
1193 | ||
1194 | return ret; | |
1195 | } | |
1196 | ||
1197 | static const struct iio_trigger_ops bmc150_accel_trigger_ops = { | |
7d963215 | 1198 | .set_trigger_state = bmc150_accel_trigger_set_state, |
bd7fe5b7 SP |
1199 | .try_reenable = bmc150_accel_trig_try_reen, |
1200 | .owner = THIS_MODULE, | |
1201 | }; | |
1202 | ||
3bbec977 | 1203 | static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) |
bd7fe5b7 | 1204 | { |
bd7fe5b7 | 1205 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
bd7fe5b7 | 1206 | int dir; |
3bbec977 | 1207 | int ret; |
4011eda6 | 1208 | unsigned int val; |
bd7fe5b7 | 1209 | |
4011eda6 | 1210 | ret = regmap_read(data->regmap, BMC150_ACCEL_REG_INT_STATUS_2, &val); |
bd7fe5b7 | 1211 | if (ret < 0) { |
19c95d63 | 1212 | dev_err(data->dev, "Error reading reg_int_status_2\n"); |
3bbec977 | 1213 | return ret; |
bd7fe5b7 SP |
1214 | } |
1215 | ||
4011eda6 | 1216 | if (val & BMC150_ACCEL_ANY_MOTION_BIT_SIGN) |
bd7fe5b7 SP |
1217 | dir = IIO_EV_DIR_FALLING; |
1218 | else | |
1219 | dir = IIO_EV_DIR_RISING; | |
1220 | ||
4011eda6 | 1221 | if (val & BMC150_ACCEL_ANY_MOTION_BIT_X) |
e20008ed HK |
1222 | iio_push_event(indio_dev, |
1223 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1224 | 0, | |
1225 | IIO_MOD_X, | |
1226 | IIO_EV_TYPE_ROC, | |
1227 | dir), | |
1228 | data->timestamp); | |
1229 | ||
4011eda6 | 1230 | if (val & BMC150_ACCEL_ANY_MOTION_BIT_Y) |
e20008ed HK |
1231 | iio_push_event(indio_dev, |
1232 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1233 | 0, | |
1234 | IIO_MOD_Y, | |
1235 | IIO_EV_TYPE_ROC, | |
1236 | dir), | |
1237 | data->timestamp); | |
1238 | ||
4011eda6 | 1239 | if (val & BMC150_ACCEL_ANY_MOTION_BIT_Z) |
e20008ed HK |
1240 | iio_push_event(indio_dev, |
1241 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1242 | 0, | |
1243 | IIO_MOD_Z, | |
1244 | IIO_EV_TYPE_ROC, | |
1245 | dir), | |
1246 | data->timestamp); | |
1247 | ||
3bbec977 OP |
1248 | return ret; |
1249 | } | |
1250 | ||
1251 | static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private) | |
1252 | { | |
1253 | struct iio_dev *indio_dev = private; | |
1254 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1255 | bool ack = false; | |
1256 | int ret; | |
1257 | ||
1258 | mutex_lock(&data->mutex); | |
1259 | ||
1260 | if (data->fifo_mode) { | |
1261 | ret = __bmc150_accel_fifo_flush(indio_dev, | |
1262 | BMC150_ACCEL_FIFO_LENGTH, true); | |
1263 | if (ret > 0) | |
1264 | ack = true; | |
1265 | } | |
1266 | ||
1267 | if (data->ev_enable_state) { | |
1268 | ret = bmc150_accel_handle_roc_event(indio_dev); | |
1269 | if (ret > 0) | |
1270 | ack = true; | |
1271 | } | |
1272 | ||
1273 | if (ack) { | |
4011eda6 MP |
1274 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, |
1275 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
1276 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
3bbec977 | 1277 | if (ret) |
19c95d63 | 1278 | dev_err(data->dev, "Error writing reg_int_rst_latch\n"); |
e20008ed | 1279 | |
3bbec977 OP |
1280 | ret = IRQ_HANDLED; |
1281 | } else { | |
1282 | ret = IRQ_NONE; | |
1283 | } | |
bd7fe5b7 | 1284 | |
3bbec977 OP |
1285 | mutex_unlock(&data->mutex); |
1286 | ||
1287 | return ret; | |
bd7fe5b7 SP |
1288 | } |
1289 | ||
3bbec977 | 1290 | static irqreturn_t bmc150_accel_irq_handler(int irq, void *private) |
bd7fe5b7 SP |
1291 | { |
1292 | struct iio_dev *indio_dev = private; | |
1293 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
3bbec977 | 1294 | bool ack = false; |
7d963215 | 1295 | int i; |
bd7fe5b7 | 1296 | |
3bbec977 | 1297 | data->old_timestamp = data->timestamp; |
bd7fe5b7 SP |
1298 | data->timestamp = iio_get_time_ns(); |
1299 | ||
7d963215 OP |
1300 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
1301 | if (data->triggers[i].enabled) { | |
1302 | iio_trigger_poll(data->triggers[i].indio_trig); | |
3bbec977 | 1303 | ack = true; |
7d963215 OP |
1304 | break; |
1305 | } | |
1306 | } | |
bd7fe5b7 | 1307 | |
3bbec977 | 1308 | if (data->ev_enable_state || data->fifo_mode) |
bd7fe5b7 | 1309 | return IRQ_WAKE_THREAD; |
3bbec977 OP |
1310 | |
1311 | if (ack) | |
bd7fe5b7 | 1312 | return IRQ_HANDLED; |
3bbec977 OP |
1313 | |
1314 | return IRQ_NONE; | |
bd7fe5b7 SP |
1315 | } |
1316 | ||
7d963215 OP |
1317 | static const struct { |
1318 | int intr; | |
1319 | const char *name; | |
1320 | int (*setup)(struct bmc150_accel_trigger *t, bool state); | |
1321 | } bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = { | |
1322 | { | |
1323 | .intr = 0, | |
1324 | .name = "%s-dev%d", | |
1325 | }, | |
1326 | { | |
1327 | .intr = 1, | |
1328 | .name = "%s-any-motion-dev%d", | |
1329 | .setup = bmc150_accel_any_motion_setup, | |
1330 | }, | |
1331 | }; | |
1332 | ||
1333 | static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data, | |
1334 | int from) | |
1335 | { | |
1336 | int i; | |
1337 | ||
7a1d0d91 | 1338 | for (i = from; i >= 0; i--) { |
7d963215 OP |
1339 | if (data->triggers[i].indio_trig) { |
1340 | iio_trigger_unregister(data->triggers[i].indio_trig); | |
1341 | data->triggers[i].indio_trig = NULL; | |
1342 | } | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev, | |
1347 | struct bmc150_accel_data *data) | |
1348 | { | |
1349 | int i, ret; | |
1350 | ||
1351 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { | |
1352 | struct bmc150_accel_trigger *t = &data->triggers[i]; | |
1353 | ||
19c95d63 | 1354 | t->indio_trig = devm_iio_trigger_alloc(data->dev, |
7d963215 OP |
1355 | bmc150_accel_triggers[i].name, |
1356 | indio_dev->name, | |
1357 | indio_dev->id); | |
1358 | if (!t->indio_trig) { | |
1359 | ret = -ENOMEM; | |
1360 | break; | |
1361 | } | |
1362 | ||
19c95d63 | 1363 | t->indio_trig->dev.parent = data->dev; |
7d963215 OP |
1364 | t->indio_trig->ops = &bmc150_accel_trigger_ops; |
1365 | t->intr = bmc150_accel_triggers[i].intr; | |
1366 | t->data = data; | |
1367 | t->setup = bmc150_accel_triggers[i].setup; | |
1368 | iio_trigger_set_drvdata(t->indio_trig, t); | |
1369 | ||
1370 | ret = iio_trigger_register(t->indio_trig); | |
1371 | if (ret) | |
1372 | break; | |
1373 | } | |
1374 | ||
1375 | if (ret) | |
1376 | bmc150_accel_unregister_triggers(data, i - 1); | |
1377 | ||
1378 | return ret; | |
1379 | } | |
1380 | ||
3bbec977 OP |
1381 | #define BMC150_ACCEL_FIFO_MODE_STREAM 0x80 |
1382 | #define BMC150_ACCEL_FIFO_MODE_FIFO 0x40 | |
1383 | #define BMC150_ACCEL_FIFO_MODE_BYPASS 0x00 | |
1384 | ||
1385 | static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data) | |
1386 | { | |
1387 | u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1; | |
1388 | int ret; | |
1389 | ||
4011eda6 | 1390 | ret = regmap_write(data->regmap, reg, data->fifo_mode); |
3bbec977 | 1391 | if (ret < 0) { |
19c95d63 | 1392 | dev_err(data->dev, "Error writing reg_fifo_config1\n"); |
3bbec977 OP |
1393 | return ret; |
1394 | } | |
1395 | ||
1396 | if (!data->fifo_mode) | |
1397 | return 0; | |
1398 | ||
4011eda6 MP |
1399 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_FIFO_CONFIG0, |
1400 | data->watermark); | |
3bbec977 | 1401 | if (ret < 0) |
19c95d63 | 1402 | dev_err(data->dev, "Error writing reg_fifo_config0\n"); |
3bbec977 OP |
1403 | |
1404 | return ret; | |
1405 | } | |
1406 | ||
c16bff48 VD |
1407 | static int bmc150_accel_buffer_preenable(struct iio_dev *indio_dev) |
1408 | { | |
1409 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1410 | ||
1411 | return bmc150_accel_set_power_state(data, true); | |
1412 | } | |
1413 | ||
3bbec977 OP |
1414 | static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev) |
1415 | { | |
1416 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1417 | int ret = 0; | |
1418 | ||
1419 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) | |
1420 | return iio_triggered_buffer_postenable(indio_dev); | |
1421 | ||
1422 | mutex_lock(&data->mutex); | |
1423 | ||
1424 | if (!data->watermark) | |
1425 | goto out; | |
1426 | ||
1427 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, | |
1428 | true); | |
1429 | if (ret) | |
1430 | goto out; | |
1431 | ||
1432 | data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO; | |
1433 | ||
1434 | ret = bmc150_accel_fifo_set_mode(data); | |
1435 | if (ret) { | |
1436 | data->fifo_mode = 0; | |
1437 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, | |
1438 | false); | |
1439 | } | |
1440 | ||
1441 | out: | |
1442 | mutex_unlock(&data->mutex); | |
1443 | ||
1444 | return ret; | |
1445 | } | |
1446 | ||
1447 | static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev) | |
1448 | { | |
1449 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1450 | ||
1451 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) | |
1452 | return iio_triggered_buffer_predisable(indio_dev); | |
1453 | ||
1454 | mutex_lock(&data->mutex); | |
1455 | ||
1456 | if (!data->fifo_mode) | |
1457 | goto out; | |
1458 | ||
1459 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false); | |
1460 | __bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false); | |
1461 | data->fifo_mode = 0; | |
1462 | bmc150_accel_fifo_set_mode(data); | |
1463 | ||
1464 | out: | |
1465 | mutex_unlock(&data->mutex); | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
c16bff48 VD |
1470 | static int bmc150_accel_buffer_postdisable(struct iio_dev *indio_dev) |
1471 | { | |
1472 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1473 | ||
1474 | return bmc150_accel_set_power_state(data, false); | |
1475 | } | |
1476 | ||
3bbec977 | 1477 | static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = { |
c16bff48 | 1478 | .preenable = bmc150_accel_buffer_preenable, |
3bbec977 OP |
1479 | .postenable = bmc150_accel_buffer_postenable, |
1480 | .predisable = bmc150_accel_buffer_predisable, | |
c16bff48 | 1481 | .postdisable = bmc150_accel_buffer_postdisable, |
3bbec977 OP |
1482 | }; |
1483 | ||
c4eaab79 BN |
1484 | static int bmc150_accel_chip_init(struct bmc150_accel_data *data) |
1485 | { | |
0ad4bf37 | 1486 | int ret, i; |
4011eda6 | 1487 | unsigned int val; |
c4eaab79 | 1488 | |
4011eda6 | 1489 | ret = regmap_read(data->regmap, BMC150_ACCEL_REG_CHIP_ID, &val); |
c4eaab79 | 1490 | if (ret < 0) { |
19c95d63 | 1491 | dev_err(data->dev, |
4011eda6 | 1492 | "Error: Reading chip id\n"); |
c4eaab79 BN |
1493 | return ret; |
1494 | } | |
1495 | ||
19c95d63 | 1496 | dev_dbg(data->dev, "Chip Id %x\n", val); |
0ad4bf37 | 1497 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_chip_info_tbl); i++) { |
4011eda6 | 1498 | if (bmc150_accel_chip_info_tbl[i].chip_id == val) { |
0ad4bf37 BN |
1499 | data->chip_info = &bmc150_accel_chip_info_tbl[i]; |
1500 | break; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | if (!data->chip_info) { | |
19c95d63 | 1505 | dev_err(data->dev, "Invalid chip %x\n", val); |
c4eaab79 BN |
1506 | return -ENODEV; |
1507 | } | |
1508 | ||
1509 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); | |
1510 | if (ret < 0) | |
1511 | return ret; | |
1512 | ||
1513 | /* Set Bandwidth */ | |
1514 | ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0); | |
1515 | if (ret < 0) | |
1516 | return ret; | |
1517 | ||
1518 | /* Set Default Range */ | |
4011eda6 MP |
1519 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_RANGE, |
1520 | BMC150_ACCEL_DEF_RANGE_4G); | |
c4eaab79 | 1521 | if (ret < 0) { |
19c95d63 | 1522 | dev_err(data->dev, |
4011eda6 | 1523 | "Error writing reg_pmu_range\n"); |
c4eaab79 BN |
1524 | return ret; |
1525 | } | |
1526 | ||
1527 | data->range = BMC150_ACCEL_DEF_RANGE_4G; | |
1528 | ||
1529 | /* Set default slope duration and thresholds */ | |
1530 | data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD; | |
1531 | data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION; | |
1532 | ret = bmc150_accel_update_slope(data); | |
1533 | if (ret < 0) | |
1534 | return ret; | |
1535 | ||
1536 | /* Set default as latched interrupts */ | |
4011eda6 MP |
1537 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, |
1538 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
1539 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
c4eaab79 | 1540 | if (ret < 0) { |
19c95d63 | 1541 | dev_err(data->dev, |
c4eaab79 BN |
1542 | "Error writing reg_int_rst_latch\n"); |
1543 | return ret; | |
1544 | } | |
1545 | ||
1546 | return 0; | |
1547 | } | |
1548 | ||
55637c38 MP |
1549 | int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq, |
1550 | const char *name, bool block_supported) | |
bd7fe5b7 SP |
1551 | { |
1552 | struct bmc150_accel_data *data; | |
1553 | struct iio_dev *indio_dev; | |
1554 | int ret; | |
1555 | ||
55637c38 | 1556 | indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); |
bd7fe5b7 SP |
1557 | if (!indio_dev) |
1558 | return -ENOMEM; | |
1559 | ||
1560 | data = iio_priv(indio_dev); | |
55637c38 MP |
1561 | dev_set_drvdata(dev, indio_dev); |
1562 | data->dev = dev; | |
1563 | data->irq = irq; | |
bd7fe5b7 | 1564 | |
55637c38 | 1565 | data->regmap = regmap; |
8ecbb3c3 | 1566 | |
bd7fe5b7 SP |
1567 | ret = bmc150_accel_chip_init(data); |
1568 | if (ret < 0) | |
1569 | return ret; | |
1570 | ||
1571 | mutex_init(&data->mutex); | |
1572 | ||
19c95d63 | 1573 | indio_dev->dev.parent = dev; |
8ecbb3c3 LP |
1574 | indio_dev->channels = data->chip_info->channels; |
1575 | indio_dev->num_channels = data->chip_info->num_channels; | |
0ad4bf37 | 1576 | indio_dev->name = name ? name : data->chip_info->name; |
bd7fe5b7 SP |
1577 | indio_dev->modes = INDIO_DIRECT_MODE; |
1578 | indio_dev->info = &bmc150_accel_info; | |
1579 | ||
c16bff48 VD |
1580 | ret = iio_triggered_buffer_setup(indio_dev, |
1581 | &iio_pollfunc_store_time, | |
1582 | bmc150_accel_trigger_handler, | |
1583 | &bmc150_accel_buffer_ops); | |
1584 | if (ret < 0) { | |
19c95d63 | 1585 | dev_err(data->dev, "Failed: iio triggered buffer setup\n"); |
c16bff48 VD |
1586 | return ret; |
1587 | } | |
1588 | ||
19c95d63 | 1589 | if (data->irq > 0) { |
bd7fe5b7 | 1590 | ret = devm_request_threaded_irq( |
19c95d63 | 1591 | data->dev, data->irq, |
3bbec977 OP |
1592 | bmc150_accel_irq_handler, |
1593 | bmc150_accel_irq_thread_handler, | |
bd7fe5b7 SP |
1594 | IRQF_TRIGGER_RISING, |
1595 | BMC150_ACCEL_IRQ_NAME, | |
1596 | indio_dev); | |
1597 | if (ret) | |
c16bff48 | 1598 | goto err_buffer_cleanup; |
bd7fe5b7 | 1599 | |
8e22f477 OP |
1600 | /* |
1601 | * Set latched mode interrupt. While certain interrupts are | |
1602 | * non-latched regardless of this settings (e.g. new data) we | |
1603 | * want to use latch mode when we can to prevent interrupt | |
1604 | * flooding. | |
1605 | */ | |
4011eda6 MP |
1606 | ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, |
1607 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
8e22f477 | 1608 | if (ret < 0) { |
19c95d63 | 1609 | dev_err(data->dev, "Error writing reg_int_rst_latch\n"); |
c16bff48 | 1610 | goto err_buffer_cleanup; |
8e22f477 OP |
1611 | } |
1612 | ||
3e825ec9 OP |
1613 | bmc150_accel_interrupts_setup(indio_dev, data); |
1614 | ||
7d963215 | 1615 | ret = bmc150_accel_triggers_setup(indio_dev, data); |
bd7fe5b7 | 1616 | if (ret) |
c16bff48 | 1617 | goto err_buffer_cleanup; |
3bbec977 | 1618 | |
55637c38 | 1619 | if (block_supported) { |
3bbec977 OP |
1620 | indio_dev->modes |= INDIO_BUFFER_SOFTWARE; |
1621 | indio_dev->info = &bmc150_accel_info_fifo; | |
1622 | indio_dev->buffer->attrs = bmc150_accel_fifo_attributes; | |
1623 | } | |
bd7fe5b7 SP |
1624 | } |
1625 | ||
19c95d63 | 1626 | ret = pm_runtime_set_active(dev); |
bd7fe5b7 | 1627 | if (ret) |
7d0ead5c | 1628 | goto err_trigger_unregister; |
bd7fe5b7 | 1629 | |
19c95d63 MP |
1630 | pm_runtime_enable(dev); |
1631 | pm_runtime_set_autosuspend_delay(dev, BMC150_AUTO_SUSPEND_DELAY_MS); | |
1632 | pm_runtime_use_autosuspend(dev); | |
bd7fe5b7 | 1633 | |
7d0ead5c AR |
1634 | ret = iio_device_register(indio_dev); |
1635 | if (ret < 0) { | |
1636 | dev_err(dev, "Unable to register iio device\n"); | |
1637 | goto err_trigger_unregister; | |
1638 | } | |
1639 | ||
bd7fe5b7 SP |
1640 | return 0; |
1641 | ||
bd7fe5b7 | 1642 | err_trigger_unregister: |
7d963215 | 1643 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
c16bff48 VD |
1644 | err_buffer_cleanup: |
1645 | iio_triggered_buffer_cleanup(indio_dev); | |
bd7fe5b7 SP |
1646 | |
1647 | return ret; | |
1648 | } | |
55637c38 | 1649 | EXPORT_SYMBOL_GPL(bmc150_accel_core_probe); |
bd7fe5b7 | 1650 | |
55637c38 | 1651 | int bmc150_accel_core_remove(struct device *dev) |
bd7fe5b7 | 1652 | { |
55637c38 | 1653 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
bd7fe5b7 SP |
1654 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
1655 | ||
7d0ead5c AR |
1656 | iio_device_unregister(indio_dev); |
1657 | ||
19c95d63 MP |
1658 | pm_runtime_disable(data->dev); |
1659 | pm_runtime_set_suspended(data->dev); | |
1660 | pm_runtime_put_noidle(data->dev); | |
bd7fe5b7 | 1661 | |
7d963215 | 1662 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
bd7fe5b7 | 1663 | |
c16bff48 VD |
1664 | iio_triggered_buffer_cleanup(indio_dev); |
1665 | ||
bd7fe5b7 SP |
1666 | mutex_lock(&data->mutex); |
1667 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0); | |
1668 | mutex_unlock(&data->mutex); | |
1669 | ||
1670 | return 0; | |
1671 | } | |
55637c38 | 1672 | EXPORT_SYMBOL_GPL(bmc150_accel_core_remove); |
bd7fe5b7 SP |
1673 | |
1674 | #ifdef CONFIG_PM_SLEEP | |
1675 | static int bmc150_accel_suspend(struct device *dev) | |
1676 | { | |
19c95d63 | 1677 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
bd7fe5b7 SP |
1678 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
1679 | ||
1680 | mutex_lock(&data->mutex); | |
1681 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); | |
1682 | mutex_unlock(&data->mutex); | |
1683 | ||
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | static int bmc150_accel_resume(struct device *dev) | |
1688 | { | |
19c95d63 | 1689 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
bd7fe5b7 SP |
1690 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
1691 | ||
1692 | mutex_lock(&data->mutex); | |
3e825ec9 | 1693 | if (atomic_read(&data->active_intr)) |
bd7fe5b7 | 1694 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); |
3bbec977 | 1695 | bmc150_accel_fifo_set_mode(data); |
bd7fe5b7 SP |
1696 | mutex_unlock(&data->mutex); |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | #endif | |
1701 | ||
6f0a13f2 | 1702 | #ifdef CONFIG_PM |
bd7fe5b7 SP |
1703 | static int bmc150_accel_runtime_suspend(struct device *dev) |
1704 | { | |
19c95d63 | 1705 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
bd7fe5b7 | 1706 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
aaeecd80 | 1707 | int ret; |
bd7fe5b7 | 1708 | |
19c95d63 | 1709 | dev_dbg(data->dev, __func__); |
aaeecd80 SP |
1710 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); |
1711 | if (ret < 0) | |
1712 | return -EAGAIN; | |
bd7fe5b7 | 1713 | |
aaeecd80 | 1714 | return 0; |
bd7fe5b7 SP |
1715 | } |
1716 | ||
1717 | static int bmc150_accel_runtime_resume(struct device *dev) | |
1718 | { | |
19c95d63 | 1719 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
bd7fe5b7 SP |
1720 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
1721 | int ret; | |
1722 | int sleep_val; | |
1723 | ||
19c95d63 | 1724 | dev_dbg(data->dev, __func__); |
bd7fe5b7 SP |
1725 | |
1726 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); | |
3bbec977 OP |
1727 | if (ret < 0) |
1728 | return ret; | |
1729 | ret = bmc150_accel_fifo_set_mode(data); | |
bd7fe5b7 SP |
1730 | if (ret < 0) |
1731 | return ret; | |
1732 | ||
1733 | sleep_val = bmc150_accel_get_startup_times(data); | |
1734 | if (sleep_val < 20) | |
1735 | usleep_range(sleep_val * 1000, 20000); | |
1736 | else | |
1737 | msleep_interruptible(sleep_val); | |
1738 | ||
1739 | return 0; | |
1740 | } | |
1741 | #endif | |
1742 | ||
55637c38 | 1743 | const struct dev_pm_ops bmc150_accel_pm_ops = { |
bd7fe5b7 SP |
1744 | SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume) |
1745 | SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend, | |
1746 | bmc150_accel_runtime_resume, NULL) | |
1747 | }; | |
55637c38 | 1748 | EXPORT_SYMBOL_GPL(bmc150_accel_pm_ops); |
bd7fe5b7 SP |
1749 | |
1750 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); | |
1751 | MODULE_LICENSE("GPL v2"); | |
1752 | MODULE_DESCRIPTION("BMC150 accelerometer driver"); |