Commit | Line | Data |
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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> | |
38 | ||
39 | #define BMC150_ACCEL_DRV_NAME "bmc150_accel" | |
40 | #define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event" | |
41 | #define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int" | |
42 | ||
43 | #define BMC150_ACCEL_REG_CHIP_ID 0x00 | |
bd7fe5b7 SP |
44 | |
45 | #define BMC150_ACCEL_REG_INT_STATUS_2 0x0B | |
46 | #define BMC150_ACCEL_ANY_MOTION_MASK 0x07 | |
8d5a9781 SP |
47 | #define BMC150_ACCEL_ANY_MOTION_BIT_X BIT(0) |
48 | #define BMC150_ACCEL_ANY_MOTION_BIT_Y BIT(1) | |
49 | #define BMC150_ACCEL_ANY_MOTION_BIT_Z BIT(2) | |
bd7fe5b7 SP |
50 | #define BMC150_ACCEL_ANY_MOTION_BIT_SIGN BIT(3) |
51 | ||
52 | #define BMC150_ACCEL_REG_PMU_LPW 0x11 | |
53 | #define BMC150_ACCEL_PMU_MODE_MASK 0xE0 | |
54 | #define BMC150_ACCEL_PMU_MODE_SHIFT 5 | |
55 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK 0x17 | |
56 | #define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT 1 | |
57 | ||
58 | #define BMC150_ACCEL_REG_PMU_RANGE 0x0F | |
59 | ||
60 | #define BMC150_ACCEL_DEF_RANGE_2G 0x03 | |
61 | #define BMC150_ACCEL_DEF_RANGE_4G 0x05 | |
62 | #define BMC150_ACCEL_DEF_RANGE_8G 0x08 | |
63 | #define BMC150_ACCEL_DEF_RANGE_16G 0x0C | |
64 | ||
65 | /* Default BW: 125Hz */ | |
66 | #define BMC150_ACCEL_REG_PMU_BW 0x10 | |
67 | #define BMC150_ACCEL_DEF_BW 125 | |
68 | ||
69 | #define BMC150_ACCEL_REG_INT_MAP_0 0x19 | |
70 | #define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2) | |
71 | ||
72 | #define BMC150_ACCEL_REG_INT_MAP_1 0x1A | |
3bbec977 OP |
73 | #define BMC150_ACCEL_INT_MAP_1_BIT_DATA BIT(0) |
74 | #define BMC150_ACCEL_INT_MAP_1_BIT_FWM BIT(1) | |
75 | #define BMC150_ACCEL_INT_MAP_1_BIT_FFULL BIT(2) | |
bd7fe5b7 SP |
76 | |
77 | #define BMC150_ACCEL_REG_INT_RST_LATCH 0x21 | |
78 | #define BMC150_ACCEL_INT_MODE_LATCH_RESET 0x80 | |
79 | #define BMC150_ACCEL_INT_MODE_LATCH_INT 0x0F | |
80 | #define BMC150_ACCEL_INT_MODE_NON_LATCH_INT 0x00 | |
81 | ||
82 | #define BMC150_ACCEL_REG_INT_EN_0 0x16 | |
83 | #define BMC150_ACCEL_INT_EN_BIT_SLP_X BIT(0) | |
84 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Y BIT(1) | |
85 | #define BMC150_ACCEL_INT_EN_BIT_SLP_Z BIT(2) | |
86 | ||
87 | #define BMC150_ACCEL_REG_INT_EN_1 0x17 | |
3bbec977 OP |
88 | #define BMC150_ACCEL_INT_EN_BIT_DATA_EN BIT(4) |
89 | #define BMC150_ACCEL_INT_EN_BIT_FFULL_EN BIT(5) | |
90 | #define BMC150_ACCEL_INT_EN_BIT_FWM_EN BIT(6) | |
bd7fe5b7 SP |
91 | |
92 | #define BMC150_ACCEL_REG_INT_OUT_CTRL 0x20 | |
93 | #define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL BIT(0) | |
94 | ||
95 | #define BMC150_ACCEL_REG_INT_5 0x27 | |
96 | #define BMC150_ACCEL_SLOPE_DUR_MASK 0x03 | |
97 | ||
98 | #define BMC150_ACCEL_REG_INT_6 0x28 | |
99 | #define BMC150_ACCEL_SLOPE_THRES_MASK 0xFF | |
100 | ||
101 | /* Slope duration in terms of number of samples */ | |
9e8e228f | 102 | #define BMC150_ACCEL_DEF_SLOPE_DURATION 1 |
bd7fe5b7 | 103 | /* in terms of multiples of g's/LSB, based on range */ |
9e8e228f | 104 | #define BMC150_ACCEL_DEF_SLOPE_THRESHOLD 1 |
bd7fe5b7 SP |
105 | |
106 | #define BMC150_ACCEL_REG_XOUT_L 0x02 | |
107 | ||
108 | #define BMC150_ACCEL_MAX_STARTUP_TIME_MS 100 | |
109 | ||
110 | /* Sleep Duration values */ | |
111 | #define BMC150_ACCEL_SLEEP_500_MICRO 0x05 | |
112 | #define BMC150_ACCEL_SLEEP_1_MS 0x06 | |
113 | #define BMC150_ACCEL_SLEEP_2_MS 0x07 | |
114 | #define BMC150_ACCEL_SLEEP_4_MS 0x08 | |
115 | #define BMC150_ACCEL_SLEEP_6_MS 0x09 | |
116 | #define BMC150_ACCEL_SLEEP_10_MS 0x0A | |
117 | #define BMC150_ACCEL_SLEEP_25_MS 0x0B | |
118 | #define BMC150_ACCEL_SLEEP_50_MS 0x0C | |
119 | #define BMC150_ACCEL_SLEEP_100_MS 0x0D | |
120 | #define BMC150_ACCEL_SLEEP_500_MS 0x0E | |
121 | #define BMC150_ACCEL_SLEEP_1_SEC 0x0F | |
122 | ||
123 | #define BMC150_ACCEL_REG_TEMP 0x08 | |
124 | #define BMC150_ACCEL_TEMP_CENTER_VAL 24 | |
125 | ||
126 | #define BMC150_ACCEL_AXIS_TO_REG(axis) (BMC150_ACCEL_REG_XOUT_L + (axis * 2)) | |
127 | #define BMC150_AUTO_SUSPEND_DELAY_MS 2000 | |
128 | ||
3bbec977 OP |
129 | #define BMC150_ACCEL_REG_FIFO_STATUS 0x0E |
130 | #define BMC150_ACCEL_REG_FIFO_CONFIG0 0x30 | |
131 | #define BMC150_ACCEL_REG_FIFO_CONFIG1 0x3E | |
132 | #define BMC150_ACCEL_REG_FIFO_DATA 0x3F | |
133 | #define BMC150_ACCEL_FIFO_LENGTH 32 | |
134 | ||
bd7fe5b7 SP |
135 | enum bmc150_accel_axis { |
136 | AXIS_X, | |
137 | AXIS_Y, | |
138 | AXIS_Z, | |
139 | }; | |
140 | ||
141 | enum bmc150_power_modes { | |
142 | BMC150_ACCEL_SLEEP_MODE_NORMAL, | |
143 | BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, | |
144 | BMC150_ACCEL_SLEEP_MODE_LPM, | |
145 | BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04, | |
146 | }; | |
147 | ||
8ecbb3c3 LP |
148 | struct bmc150_scale_info { |
149 | int scale; | |
150 | u8 reg_range; | |
151 | }; | |
152 | ||
153 | struct bmc150_accel_chip_info { | |
154 | u8 chip_id; | |
155 | const struct iio_chan_spec *channels; | |
156 | int num_channels; | |
157 | const struct bmc150_scale_info scale_table[4]; | |
158 | }; | |
159 | ||
3e825ec9 OP |
160 | struct bmc150_accel_interrupt { |
161 | const struct bmc150_accel_interrupt_info *info; | |
162 | atomic_t users; | |
163 | }; | |
164 | ||
7d963215 OP |
165 | struct bmc150_accel_trigger { |
166 | struct bmc150_accel_data *data; | |
167 | struct iio_trigger *indio_trig; | |
168 | int (*setup)(struct bmc150_accel_trigger *t, bool state); | |
169 | int intr; | |
170 | bool enabled; | |
171 | }; | |
172 | ||
3e825ec9 OP |
173 | enum bmc150_accel_interrupt_id { |
174 | BMC150_ACCEL_INT_DATA_READY, | |
175 | BMC150_ACCEL_INT_ANY_MOTION, | |
176 | BMC150_ACCEL_INT_WATERMARK, | |
177 | BMC150_ACCEL_INTERRUPTS, | |
178 | }; | |
179 | ||
7d963215 OP |
180 | enum bmc150_accel_trigger_id { |
181 | BMC150_ACCEL_TRIGGER_DATA_READY, | |
182 | BMC150_ACCEL_TRIGGER_ANY_MOTION, | |
183 | BMC150_ACCEL_TRIGGERS, | |
184 | }; | |
185 | ||
bd7fe5b7 SP |
186 | struct bmc150_accel_data { |
187 | struct i2c_client *client; | |
3e825ec9 | 188 | struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS]; |
3e825ec9 | 189 | atomic_t active_intr; |
7d963215 | 190 | struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS]; |
bd7fe5b7 | 191 | struct mutex mutex; |
3bbec977 | 192 | u8 fifo_mode, watermark; |
bd7fe5b7 SP |
193 | s16 buffer[8]; |
194 | u8 bw_bits; | |
195 | u32 slope_dur; | |
196 | u32 slope_thres; | |
197 | u32 range; | |
198 | int ev_enable_state; | |
3bbec977 | 199 | int64_t timestamp, old_timestamp; |
8ecbb3c3 | 200 | const struct bmc150_accel_chip_info *chip_info; |
bd7fe5b7 SP |
201 | }; |
202 | ||
203 | static const struct { | |
204 | int val; | |
205 | int val2; | |
206 | u8 bw_bits; | |
0ba8da96 SK |
207 | } bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08}, |
208 | {31, 260000, 0x09}, | |
209 | {62, 500000, 0x0A}, | |
210 | {125, 0, 0x0B}, | |
211 | {250, 0, 0x0C}, | |
212 | {500, 0, 0x0D}, | |
213 | {1000, 0, 0x0E}, | |
214 | {2000, 0, 0x0F} }; | |
bd7fe5b7 SP |
215 | |
216 | static const struct { | |
217 | int bw_bits; | |
218 | int msec; | |
219 | } bmc150_accel_sample_upd_time[] = { {0x08, 64}, | |
220 | {0x09, 32}, | |
221 | {0x0A, 16}, | |
222 | {0x0B, 8}, | |
223 | {0x0C, 4}, | |
224 | {0x0D, 2}, | |
225 | {0x0E, 1}, | |
226 | {0x0F, 1} }; | |
227 | ||
bd7fe5b7 SP |
228 | static const struct { |
229 | int sleep_dur; | |
8ecbb3c3 | 230 | u8 reg_value; |
bd7fe5b7 SP |
231 | } bmc150_accel_sleep_value_table[] = { {0, 0}, |
232 | {500, BMC150_ACCEL_SLEEP_500_MICRO}, | |
233 | {1000, BMC150_ACCEL_SLEEP_1_MS}, | |
234 | {2000, BMC150_ACCEL_SLEEP_2_MS}, | |
235 | {4000, BMC150_ACCEL_SLEEP_4_MS}, | |
236 | {6000, BMC150_ACCEL_SLEEP_6_MS}, | |
237 | {10000, BMC150_ACCEL_SLEEP_10_MS}, | |
238 | {25000, BMC150_ACCEL_SLEEP_25_MS}, | |
239 | {50000, BMC150_ACCEL_SLEEP_50_MS}, | |
240 | {100000, BMC150_ACCEL_SLEEP_100_MS}, | |
241 | {500000, BMC150_ACCEL_SLEEP_500_MS}, | |
242 | {1000000, BMC150_ACCEL_SLEEP_1_SEC} }; | |
243 | ||
244 | ||
245 | static int bmc150_accel_set_mode(struct bmc150_accel_data *data, | |
246 | enum bmc150_power_modes mode, | |
247 | int dur_us) | |
248 | { | |
249 | int i; | |
250 | int ret; | |
251 | u8 lpw_bits; | |
252 | int dur_val = -1; | |
253 | ||
254 | if (dur_us > 0) { | |
255 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table); | |
256 | ++i) { | |
257 | if (bmc150_accel_sleep_value_table[i].sleep_dur == | |
258 | dur_us) | |
259 | dur_val = | |
260 | bmc150_accel_sleep_value_table[i].reg_value; | |
261 | } | |
262 | } else | |
263 | dur_val = 0; | |
264 | ||
265 | if (dur_val < 0) | |
266 | return -EINVAL; | |
267 | ||
268 | lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT; | |
269 | lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT); | |
270 | ||
271 | dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits); | |
272 | ||
273 | ret = i2c_smbus_write_byte_data(data->client, | |
274 | BMC150_ACCEL_REG_PMU_LPW, lpw_bits); | |
275 | if (ret < 0) { | |
276 | dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n"); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val, | |
284 | int val2) | |
285 | { | |
286 | int i; | |
287 | int ret; | |
288 | ||
289 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { | |
290 | if (bmc150_accel_samp_freq_table[i].val == val && | |
291 | bmc150_accel_samp_freq_table[i].val2 == val2) { | |
292 | ret = i2c_smbus_write_byte_data( | |
293 | data->client, | |
294 | BMC150_ACCEL_REG_PMU_BW, | |
295 | bmc150_accel_samp_freq_table[i].bw_bits); | |
296 | if (ret < 0) | |
297 | return ret; | |
298 | ||
299 | data->bw_bits = | |
300 | bmc150_accel_samp_freq_table[i].bw_bits; | |
301 | return 0; | |
302 | } | |
303 | } | |
304 | ||
305 | return -EINVAL; | |
306 | } | |
307 | ||
802a3aef OP |
308 | static int bmc150_accel_update_slope(struct bmc150_accel_data *data) |
309 | { | |
310 | int ret, val; | |
311 | ||
312 | ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6, | |
313 | data->slope_thres); | |
314 | if (ret < 0) { | |
315 | dev_err(&data->client->dev, "Error writing reg_int_6\n"); | |
316 | return ret; | |
317 | } | |
318 | ||
319 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5); | |
320 | if (ret < 0) { | |
321 | dev_err(&data->client->dev, "Error reading reg_int_5\n"); | |
322 | return ret; | |
323 | } | |
324 | ||
325 | val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur; | |
326 | ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5, | |
327 | val); | |
328 | if (ret < 0) { | |
329 | dev_err(&data->client->dev, "Error write reg_int_5\n"); | |
330 | return ret; | |
331 | } | |
332 | ||
333 | dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres, | |
334 | data->slope_dur); | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
7d963215 OP |
339 | static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t, |
340 | bool state) | |
341 | { | |
342 | if (state) | |
343 | return bmc150_accel_update_slope(t->data); | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
bd7fe5b7 SP |
348 | static int bmc150_accel_chip_init(struct bmc150_accel_data *data) |
349 | { | |
350 | int ret; | |
351 | ||
352 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID); | |
353 | if (ret < 0) { | |
354 | dev_err(&data->client->dev, | |
355 | "Error: Reading chip id\n"); | |
356 | return ret; | |
357 | } | |
358 | ||
359 | dev_dbg(&data->client->dev, "Chip Id %x\n", ret); | |
8ecbb3c3 | 360 | if (ret != data->chip_info->chip_id) { |
bd7fe5b7 SP |
361 | dev_err(&data->client->dev, "Invalid chip %x\n", ret); |
362 | return -ENODEV; | |
363 | } | |
364 | ||
365 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); | |
366 | if (ret < 0) | |
367 | return ret; | |
368 | ||
369 | /* Set Bandwidth */ | |
370 | ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0); | |
371 | if (ret < 0) | |
372 | return ret; | |
373 | ||
374 | /* Set Default Range */ | |
375 | ret = i2c_smbus_write_byte_data(data->client, | |
376 | BMC150_ACCEL_REG_PMU_RANGE, | |
377 | BMC150_ACCEL_DEF_RANGE_4G); | |
378 | if (ret < 0) { | |
379 | dev_err(&data->client->dev, | |
380 | "Error writing reg_pmu_range\n"); | |
381 | return ret; | |
382 | } | |
383 | ||
384 | data->range = BMC150_ACCEL_DEF_RANGE_4G; | |
385 | ||
802a3aef | 386 | /* Set default slope duration and thresholds */ |
bd7fe5b7 | 387 | data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD; |
802a3aef OP |
388 | data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION; |
389 | ret = bmc150_accel_update_slope(data); | |
390 | if (ret < 0) | |
391 | return ret; | |
bd7fe5b7 SP |
392 | |
393 | /* Set default as latched interrupts */ | |
394 | ret = i2c_smbus_write_byte_data(data->client, | |
395 | BMC150_ACCEL_REG_INT_RST_LATCH, | |
396 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
397 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
398 | if (ret < 0) { | |
399 | dev_err(&data->client->dev, | |
400 | "Error writing reg_int_rst_latch\n"); | |
401 | return ret; | |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
bd7fe5b7 SP |
407 | static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val, |
408 | int *val2) | |
409 | { | |
410 | int i; | |
411 | ||
412 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { | |
413 | if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) { | |
414 | *val = bmc150_accel_samp_freq_table[i].val; | |
415 | *val2 = bmc150_accel_samp_freq_table[i].val2; | |
416 | return IIO_VAL_INT_PLUS_MICRO; | |
417 | } | |
418 | } | |
419 | ||
420 | return -EINVAL; | |
421 | } | |
422 | ||
6f0a13f2 | 423 | #ifdef CONFIG_PM |
bd7fe5b7 SP |
424 | static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data) |
425 | { | |
426 | int i; | |
427 | ||
428 | for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) { | |
429 | if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits) | |
430 | return bmc150_accel_sample_upd_time[i].msec; | |
431 | } | |
432 | ||
433 | return BMC150_ACCEL_MAX_STARTUP_TIME_MS; | |
434 | } | |
435 | ||
436 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) | |
437 | { | |
438 | int ret; | |
439 | ||
440 | if (on) | |
441 | ret = pm_runtime_get_sync(&data->client->dev); | |
442 | else { | |
443 | pm_runtime_mark_last_busy(&data->client->dev); | |
444 | ret = pm_runtime_put_autosuspend(&data->client->dev); | |
445 | } | |
446 | if (ret < 0) { | |
447 | dev_err(&data->client->dev, | |
448 | "Failed: bmc150_accel_set_power_state for %d\n", on); | |
aaeecd80 SP |
449 | if (on) |
450 | pm_runtime_put_noidle(&data->client->dev); | |
451 | ||
bd7fe5b7 SP |
452 | return ret; |
453 | } | |
454 | ||
455 | return 0; | |
456 | } | |
b31b05cf LP |
457 | #else |
458 | static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) | |
459 | { | |
460 | return 0; | |
461 | } | |
462 | #endif | |
bd7fe5b7 | 463 | |
8e22f477 OP |
464 | static const struct bmc150_accel_interrupt_info { |
465 | u8 map_reg; | |
466 | u8 map_bitmask; | |
467 | u8 en_reg; | |
468 | u8 en_bitmask; | |
3e825ec9 | 469 | } bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = { |
8e22f477 OP |
470 | { /* data ready interrupt */ |
471 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, | |
472 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA, | |
473 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, | |
474 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN, | |
475 | }, | |
476 | { /* motion interrupt */ | |
477 | .map_reg = BMC150_ACCEL_REG_INT_MAP_0, | |
478 | .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE, | |
479 | .en_reg = BMC150_ACCEL_REG_INT_EN_0, | |
480 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X | | |
481 | BMC150_ACCEL_INT_EN_BIT_SLP_Y | | |
482 | BMC150_ACCEL_INT_EN_BIT_SLP_Z | |
483 | }, | |
3bbec977 OP |
484 | { /* fifo watermark interrupt */ |
485 | .map_reg = BMC150_ACCEL_REG_INT_MAP_1, | |
486 | .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM, | |
487 | .en_reg = BMC150_ACCEL_REG_INT_EN_1, | |
488 | .en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN, | |
489 | }, | |
8e22f477 OP |
490 | }; |
491 | ||
3e825ec9 OP |
492 | static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev, |
493 | struct bmc150_accel_data *data) | |
494 | { | |
495 | int i; | |
496 | ||
497 | for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++) | |
498 | data->interrupts[i].info = &bmc150_accel_interrupts[i]; | |
499 | } | |
500 | ||
501 | static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i, | |
8e22f477 OP |
502 | bool state) |
503 | { | |
3e825ec9 OP |
504 | struct bmc150_accel_interrupt *intr = &data->interrupts[i]; |
505 | const struct bmc150_accel_interrupt_info *info = intr->info; | |
8e22f477 OP |
506 | int ret; |
507 | ||
3e825ec9 OP |
508 | if (state) { |
509 | if (atomic_inc_return(&intr->users) > 1) | |
510 | return 0; | |
511 | } else { | |
512 | if (atomic_dec_return(&intr->users) > 0) | |
513 | return 0; | |
514 | } | |
515 | ||
8e22f477 OP |
516 | /* |
517 | * We will expect the enable and disable to do operation in | |
518 | * in reverse order. This will happen here anyway as our | |
519 | * resume operation uses sync mode runtime pm calls, the | |
520 | * suspend operation will be delayed by autosuspend delay | |
521 | * So the disable operation will still happen in reverse of | |
522 | * enable operation. When runtime pm is disabled the mode | |
523 | * is always on so sequence doesn't matter | |
524 | */ | |
525 | ret = bmc150_accel_set_power_state(data, state); | |
526 | if (ret < 0) | |
527 | return ret; | |
528 | ||
529 | /* map the interrupt to the appropriate pins */ | |
530 | ret = i2c_smbus_read_byte_data(data->client, info->map_reg); | |
531 | if (ret < 0) { | |
532 | dev_err(&data->client->dev, "Error reading reg_int_map\n"); | |
533 | goto out_fix_power_state; | |
534 | } | |
535 | if (state) | |
536 | ret |= info->map_bitmask; | |
537 | else | |
538 | ret &= ~info->map_bitmask; | |
539 | ||
540 | ret = i2c_smbus_write_byte_data(data->client, info->map_reg, | |
541 | ret); | |
542 | if (ret < 0) { | |
543 | dev_err(&data->client->dev, "Error writing reg_int_map\n"); | |
544 | goto out_fix_power_state; | |
545 | } | |
546 | ||
547 | /* enable/disable the interrupt */ | |
548 | ret = i2c_smbus_read_byte_data(data->client, info->en_reg); | |
549 | if (ret < 0) { | |
550 | dev_err(&data->client->dev, "Error reading reg_int_en\n"); | |
551 | goto out_fix_power_state; | |
552 | } | |
553 | ||
554 | if (state) | |
555 | ret |= info->en_bitmask; | |
556 | else | |
557 | ret &= ~info->en_bitmask; | |
558 | ||
559 | ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret); | |
560 | if (ret < 0) { | |
561 | dev_err(&data->client->dev, "Error writing reg_int_en\n"); | |
562 | goto out_fix_power_state; | |
563 | } | |
564 | ||
3e825ec9 OP |
565 | if (state) |
566 | atomic_inc(&data->active_intr); | |
567 | else | |
568 | atomic_dec(&data->active_intr); | |
569 | ||
8e22f477 OP |
570 | return 0; |
571 | ||
572 | out_fix_power_state: | |
573 | bmc150_accel_set_power_state(data, false); | |
574 | return ret; | |
575 | } | |
576 | ||
8e22f477 | 577 | |
bd7fe5b7 SP |
578 | static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) |
579 | { | |
580 | int ret, i; | |
581 | ||
8ecbb3c3 LP |
582 | for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) { |
583 | if (data->chip_info->scale_table[i].scale == val) { | |
bd7fe5b7 | 584 | ret = i2c_smbus_write_byte_data( |
8ecbb3c3 LP |
585 | data->client, |
586 | BMC150_ACCEL_REG_PMU_RANGE, | |
587 | data->chip_info->scale_table[i].reg_range); | |
bd7fe5b7 SP |
588 | if (ret < 0) { |
589 | dev_err(&data->client->dev, | |
590 | "Error writing pmu_range\n"); | |
591 | return ret; | |
592 | } | |
593 | ||
8ecbb3c3 | 594 | data->range = data->chip_info->scale_table[i].reg_range; |
bd7fe5b7 SP |
595 | return 0; |
596 | } | |
597 | } | |
598 | ||
599 | return -EINVAL; | |
600 | } | |
601 | ||
602 | static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val) | |
603 | { | |
604 | int ret; | |
605 | ||
606 | mutex_lock(&data->mutex); | |
607 | ||
608 | ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP); | |
609 | if (ret < 0) { | |
610 | dev_err(&data->client->dev, "Error reading reg_temp\n"); | |
611 | mutex_unlock(&data->mutex); | |
612 | return ret; | |
613 | } | |
614 | *val = sign_extend32(ret, 7); | |
615 | ||
616 | mutex_unlock(&data->mutex); | |
617 | ||
618 | return IIO_VAL_INT; | |
619 | } | |
620 | ||
8ecbb3c3 LP |
621 | static int bmc150_accel_get_axis(struct bmc150_accel_data *data, |
622 | struct iio_chan_spec const *chan, | |
bd7fe5b7 SP |
623 | int *val) |
624 | { | |
625 | int ret; | |
8ecbb3c3 | 626 | int axis = chan->scan_index; |
bd7fe5b7 SP |
627 | |
628 | mutex_lock(&data->mutex); | |
629 | ret = bmc150_accel_set_power_state(data, true); | |
630 | if (ret < 0) { | |
631 | mutex_unlock(&data->mutex); | |
632 | return ret; | |
633 | } | |
634 | ||
635 | ret = i2c_smbus_read_word_data(data->client, | |
636 | BMC150_ACCEL_AXIS_TO_REG(axis)); | |
637 | if (ret < 0) { | |
638 | dev_err(&data->client->dev, "Error reading axis %d\n", axis); | |
639 | bmc150_accel_set_power_state(data, false); | |
640 | mutex_unlock(&data->mutex); | |
641 | return ret; | |
642 | } | |
8ecbb3c3 LP |
643 | *val = sign_extend32(ret >> chan->scan_type.shift, |
644 | chan->scan_type.realbits - 1); | |
bd7fe5b7 SP |
645 | ret = bmc150_accel_set_power_state(data, false); |
646 | mutex_unlock(&data->mutex); | |
647 | if (ret < 0) | |
648 | return ret; | |
649 | ||
650 | return IIO_VAL_INT; | |
651 | } | |
652 | ||
653 | static int bmc150_accel_read_raw(struct iio_dev *indio_dev, | |
654 | struct iio_chan_spec const *chan, | |
655 | int *val, int *val2, long mask) | |
656 | { | |
657 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
658 | int ret; | |
659 | ||
660 | switch (mask) { | |
661 | case IIO_CHAN_INFO_RAW: | |
662 | switch (chan->type) { | |
663 | case IIO_TEMP: | |
664 | return bmc150_accel_get_temp(data, val); | |
665 | case IIO_ACCEL: | |
666 | if (iio_buffer_enabled(indio_dev)) | |
667 | return -EBUSY; | |
668 | else | |
8ecbb3c3 | 669 | return bmc150_accel_get_axis(data, chan, val); |
bd7fe5b7 SP |
670 | default: |
671 | return -EINVAL; | |
672 | } | |
673 | case IIO_CHAN_INFO_OFFSET: | |
674 | if (chan->type == IIO_TEMP) { | |
675 | *val = BMC150_ACCEL_TEMP_CENTER_VAL; | |
676 | return IIO_VAL_INT; | |
677 | } else | |
678 | return -EINVAL; | |
679 | case IIO_CHAN_INFO_SCALE: | |
680 | *val = 0; | |
681 | switch (chan->type) { | |
682 | case IIO_TEMP: | |
683 | *val2 = 500000; | |
684 | return IIO_VAL_INT_PLUS_MICRO; | |
685 | case IIO_ACCEL: | |
686 | { | |
687 | int i; | |
8ecbb3c3 LP |
688 | const struct bmc150_scale_info *si; |
689 | int st_size = ARRAY_SIZE(data->chip_info->scale_table); | |
bd7fe5b7 | 690 | |
8ecbb3c3 LP |
691 | for (i = 0; i < st_size; ++i) { |
692 | si = &data->chip_info->scale_table[i]; | |
693 | if (si->reg_range == data->range) { | |
694 | *val2 = si->scale; | |
bd7fe5b7 SP |
695 | return IIO_VAL_INT_PLUS_MICRO; |
696 | } | |
697 | } | |
698 | return -EINVAL; | |
699 | } | |
700 | default: | |
701 | return -EINVAL; | |
702 | } | |
703 | case IIO_CHAN_INFO_SAMP_FREQ: | |
704 | mutex_lock(&data->mutex); | |
705 | ret = bmc150_accel_get_bw(data, val, val2); | |
706 | mutex_unlock(&data->mutex); | |
707 | return ret; | |
708 | default: | |
709 | return -EINVAL; | |
710 | } | |
711 | } | |
712 | ||
713 | static int bmc150_accel_write_raw(struct iio_dev *indio_dev, | |
714 | struct iio_chan_spec const *chan, | |
715 | int val, int val2, long mask) | |
716 | { | |
717 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
718 | int ret; | |
719 | ||
720 | switch (mask) { | |
721 | case IIO_CHAN_INFO_SAMP_FREQ: | |
722 | mutex_lock(&data->mutex); | |
723 | ret = bmc150_accel_set_bw(data, val, val2); | |
724 | mutex_unlock(&data->mutex); | |
725 | break; | |
726 | case IIO_CHAN_INFO_SCALE: | |
727 | if (val) | |
728 | return -EINVAL; | |
729 | ||
730 | mutex_lock(&data->mutex); | |
731 | ret = bmc150_accel_set_scale(data, val2); | |
732 | mutex_unlock(&data->mutex); | |
733 | return ret; | |
734 | default: | |
735 | ret = -EINVAL; | |
736 | } | |
737 | ||
738 | return ret; | |
739 | } | |
740 | ||
741 | static int bmc150_accel_read_event(struct iio_dev *indio_dev, | |
742 | const struct iio_chan_spec *chan, | |
743 | enum iio_event_type type, | |
744 | enum iio_event_direction dir, | |
745 | enum iio_event_info info, | |
746 | int *val, int *val2) | |
747 | { | |
748 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
749 | ||
750 | *val2 = 0; | |
751 | switch (info) { | |
752 | case IIO_EV_INFO_VALUE: | |
753 | *val = data->slope_thres; | |
754 | break; | |
755 | case IIO_EV_INFO_PERIOD: | |
802a3aef | 756 | *val = data->slope_dur; |
bd7fe5b7 SP |
757 | break; |
758 | default: | |
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | return IIO_VAL_INT; | |
763 | } | |
764 | ||
765 | static int bmc150_accel_write_event(struct iio_dev *indio_dev, | |
766 | const struct iio_chan_spec *chan, | |
767 | enum iio_event_type type, | |
768 | enum iio_event_direction dir, | |
769 | enum iio_event_info info, | |
770 | int val, int val2) | |
771 | { | |
772 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
773 | ||
774 | if (data->ev_enable_state) | |
775 | return -EBUSY; | |
776 | ||
777 | switch (info) { | |
778 | case IIO_EV_INFO_VALUE: | |
802a3aef | 779 | data->slope_thres = val & 0xFF; |
bd7fe5b7 SP |
780 | break; |
781 | case IIO_EV_INFO_PERIOD: | |
802a3aef | 782 | data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK; |
bd7fe5b7 SP |
783 | break; |
784 | default: | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static int bmc150_accel_read_event_config(struct iio_dev *indio_dev, | |
792 | const struct iio_chan_spec *chan, | |
793 | enum iio_event_type type, | |
794 | enum iio_event_direction dir) | |
795 | { | |
796 | ||
797 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
798 | ||
799 | return data->ev_enable_state; | |
800 | } | |
801 | ||
802 | static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, | |
803 | const struct iio_chan_spec *chan, | |
804 | enum iio_event_type type, | |
805 | enum iio_event_direction dir, | |
806 | int state) | |
807 | { | |
808 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
809 | int ret; | |
810 | ||
14ee64f4 | 811 | if (state == data->ev_enable_state) |
bd7fe5b7 SP |
812 | return 0; |
813 | ||
814 | mutex_lock(&data->mutex); | |
815 | ||
3e825ec9 OP |
816 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION, |
817 | state); | |
bd7fe5b7 SP |
818 | if (ret < 0) { |
819 | mutex_unlock(&data->mutex); | |
820 | return ret; | |
821 | } | |
822 | ||
823 | data->ev_enable_state = state; | |
824 | mutex_unlock(&data->mutex); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev, | |
830 | struct iio_trigger *trig) | |
831 | { | |
832 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
7d963215 | 833 | int i; |
bd7fe5b7 | 834 | |
7d963215 OP |
835 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
836 | if (data->triggers[i].indio_trig == trig) | |
837 | return 0; | |
838 | } | |
bd7fe5b7 | 839 | |
7d963215 | 840 | return -EINVAL; |
bd7fe5b7 SP |
841 | } |
842 | ||
3bbec977 OP |
843 | static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev, |
844 | struct device_attribute *attr, | |
845 | char *buf) | |
846 | { | |
847 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
848 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
849 | int wm; | |
850 | ||
851 | mutex_lock(&data->mutex); | |
852 | wm = data->watermark; | |
853 | mutex_unlock(&data->mutex); | |
854 | ||
855 | return sprintf(buf, "%d\n", wm); | |
856 | } | |
857 | ||
858 | static ssize_t bmc150_accel_get_fifo_state(struct device *dev, | |
859 | struct device_attribute *attr, | |
860 | char *buf) | |
861 | { | |
862 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
863 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
864 | bool state; | |
865 | ||
866 | mutex_lock(&data->mutex); | |
867 | state = data->fifo_mode; | |
868 | mutex_unlock(&data->mutex); | |
869 | ||
870 | return sprintf(buf, "%d\n", state); | |
871 | } | |
872 | ||
873 | static IIO_CONST_ATTR(hwfifo_watermark_min, "1"); | |
874 | static IIO_CONST_ATTR(hwfifo_watermark_max, | |
875 | __stringify(BMC150_ACCEL_FIFO_LENGTH)); | |
876 | static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO, | |
877 | bmc150_accel_get_fifo_state, NULL, 0); | |
878 | static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO, | |
879 | bmc150_accel_get_fifo_watermark, NULL, 0); | |
880 | ||
881 | static const struct attribute *bmc150_accel_fifo_attributes[] = { | |
882 | &iio_const_attr_hwfifo_watermark_min.dev_attr.attr, | |
883 | &iio_const_attr_hwfifo_watermark_max.dev_attr.attr, | |
884 | &iio_dev_attr_hwfifo_watermark.dev_attr.attr, | |
885 | &iio_dev_attr_hwfifo_enabled.dev_attr.attr, | |
886 | NULL, | |
887 | }; | |
888 | ||
889 | static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val) | |
890 | { | |
891 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
892 | ||
893 | if (val > BMC150_ACCEL_FIFO_LENGTH) | |
894 | val = BMC150_ACCEL_FIFO_LENGTH; | |
895 | ||
896 | mutex_lock(&data->mutex); | |
897 | data->watermark = val; | |
898 | mutex_unlock(&data->mutex); | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | /* | |
904 | * We must read at least one full frame in one burst, otherwise the rest of the | |
905 | * frame data is discarded. | |
906 | */ | |
907 | static int bmc150_accel_fifo_transfer(const struct i2c_client *client, | |
908 | char *buffer, int samples) | |
909 | { | |
910 | int sample_length = 3 * 2; | |
911 | u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA; | |
912 | int ret = -EIO; | |
913 | ||
914 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
915 | struct i2c_msg msg[2] = { | |
916 | { | |
917 | .addr = client->addr, | |
918 | .flags = 0, | |
919 | .buf = ®_fifo_data, | |
920 | .len = sizeof(reg_fifo_data), | |
921 | }, | |
922 | { | |
923 | .addr = client->addr, | |
924 | .flags = I2C_M_RD, | |
925 | .buf = (u8 *)buffer, | |
926 | .len = samples * sample_length, | |
927 | } | |
928 | }; | |
929 | ||
930 | ret = i2c_transfer(client->adapter, msg, 2); | |
931 | if (ret != 2) | |
932 | ret = -EIO; | |
933 | else | |
934 | ret = 0; | |
935 | } else { | |
936 | int i, step = I2C_SMBUS_BLOCK_MAX / sample_length; | |
937 | ||
938 | for (i = 0; i < samples * sample_length; i += step) { | |
939 | ret = i2c_smbus_read_i2c_block_data(client, | |
940 | reg_fifo_data, step, | |
941 | &buffer[i]); | |
942 | if (ret != step) { | |
943 | ret = -EIO; | |
944 | break; | |
945 | } | |
946 | ||
947 | ret = 0; | |
948 | } | |
949 | } | |
950 | ||
951 | if (ret) | |
952 | dev_err(&client->dev, "Error transferring data from fifo\n"); | |
953 | ||
954 | return ret; | |
955 | } | |
956 | ||
957 | static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev, | |
958 | unsigned samples, bool irq) | |
959 | { | |
960 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
961 | int ret, i; | |
962 | u8 count; | |
963 | u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; | |
964 | int64_t tstamp; | |
965 | uint64_t sample_period; | |
966 | ret = i2c_smbus_read_byte_data(data->client, | |
967 | BMC150_ACCEL_REG_FIFO_STATUS); | |
968 | if (ret < 0) { | |
969 | dev_err(&data->client->dev, "Error reading reg_fifo_status\n"); | |
970 | return ret; | |
971 | } | |
972 | ||
973 | count = ret & 0x7F; | |
974 | ||
975 | if (!count) | |
976 | return 0; | |
977 | ||
978 | /* | |
979 | * If we getting called from IRQ handler we know the stored timestamp is | |
980 | * fairly accurate for the last stored sample. Otherwise, if we are | |
981 | * called as a result of a read operation from userspace and hence | |
982 | * before the watermark interrupt was triggered, take a timestamp | |
983 | * now. We can fall anywhere in between two samples so the error in this | |
984 | * case is at most one sample period. | |
985 | */ | |
986 | if (!irq) { | |
987 | data->old_timestamp = data->timestamp; | |
988 | data->timestamp = iio_get_time_ns(); | |
989 | } | |
990 | ||
991 | /* | |
992 | * Approximate timestamps for each of the sample based on the sampling | |
993 | * frequency, timestamp for last sample and number of samples. | |
994 | * | |
995 | * Note that we can't use the current bandwidth settings to compute the | |
996 | * sample period because the sample rate varies with the device | |
997 | * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That | |
998 | * small variation adds when we store a large number of samples and | |
999 | * creates significant jitter between the last and first samples in | |
1000 | * different batches (e.g. 32ms vs 21ms). | |
1001 | * | |
1002 | * To avoid this issue we compute the actual sample period ourselves | |
1003 | * based on the timestamp delta between the last two flush operations. | |
1004 | */ | |
1005 | sample_period = (data->timestamp - data->old_timestamp); | |
1006 | do_div(sample_period, count); | |
1007 | tstamp = data->timestamp - (count - 1) * sample_period; | |
1008 | ||
1009 | if (samples && count > samples) | |
1010 | count = samples; | |
1011 | ||
1012 | ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count); | |
1013 | if (ret) | |
1014 | return ret; | |
1015 | ||
1016 | /* | |
1017 | * Ideally we want the IIO core to handle the demux when running in fifo | |
1018 | * mode but not when running in triggered buffer mode. Unfortunately | |
1019 | * this does not seem to be possible, so stick with driver demux for | |
1020 | * now. | |
1021 | */ | |
1022 | for (i = 0; i < count; i++) { | |
1023 | u16 sample[8]; | |
1024 | int j, bit; | |
1025 | ||
1026 | j = 0; | |
1027 | for_each_set_bit(bit, indio_dev->active_scan_mask, | |
1028 | indio_dev->masklength) | |
1029 | memcpy(&sample[j++], &buffer[i * 3 + bit], 2); | |
1030 | ||
1031 | iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp); | |
1032 | ||
1033 | tstamp += sample_period; | |
1034 | } | |
1035 | ||
1036 | return count; | |
1037 | } | |
1038 | ||
1039 | static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples) | |
1040 | { | |
1041 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1042 | int ret; | |
1043 | ||
1044 | mutex_lock(&data->mutex); | |
1045 | ret = __bmc150_accel_fifo_flush(indio_dev, samples, false); | |
1046 | mutex_unlock(&data->mutex); | |
1047 | ||
1048 | return ret; | |
1049 | } | |
1050 | ||
bd7fe5b7 | 1051 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( |
0ba8da96 | 1052 | "15.620000 31.260000 62.50000 125 250 500 1000 2000"); |
bd7fe5b7 SP |
1053 | |
1054 | static struct attribute *bmc150_accel_attributes[] = { | |
1055 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
1056 | NULL, | |
1057 | }; | |
1058 | ||
1059 | static const struct attribute_group bmc150_accel_attrs_group = { | |
1060 | .attrs = bmc150_accel_attributes, | |
1061 | }; | |
1062 | ||
1063 | static const struct iio_event_spec bmc150_accel_event = { | |
1064 | .type = IIO_EV_TYPE_ROC, | |
1174124c | 1065 | .dir = IIO_EV_DIR_EITHER, |
bd7fe5b7 SP |
1066 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
1067 | BIT(IIO_EV_INFO_ENABLE) | | |
1068 | BIT(IIO_EV_INFO_PERIOD) | |
1069 | }; | |
1070 | ||
8ecbb3c3 | 1071 | #define BMC150_ACCEL_CHANNEL(_axis, bits) { \ |
bd7fe5b7 SP |
1072 | .type = IIO_ACCEL, \ |
1073 | .modified = 1, \ | |
1074 | .channel2 = IIO_MOD_##_axis, \ | |
1075 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
1076 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
1077 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
1078 | .scan_index = AXIS_##_axis, \ | |
1079 | .scan_type = { \ | |
1080 | .sign = 's', \ | |
8ecbb3c3 | 1081 | .realbits = (bits), \ |
bd7fe5b7 | 1082 | .storagebits = 16, \ |
8ecbb3c3 | 1083 | .shift = 16 - (bits), \ |
bd7fe5b7 SP |
1084 | }, \ |
1085 | .event_spec = &bmc150_accel_event, \ | |
1086 | .num_event_specs = 1 \ | |
1087 | } | |
1088 | ||
8ecbb3c3 LP |
1089 | #define BMC150_ACCEL_CHANNELS(bits) { \ |
1090 | { \ | |
1091 | .type = IIO_TEMP, \ | |
1092 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
1093 | BIT(IIO_CHAN_INFO_SCALE) | \ | |
1094 | BIT(IIO_CHAN_INFO_OFFSET), \ | |
1095 | .scan_index = -1, \ | |
1096 | }, \ | |
1097 | BMC150_ACCEL_CHANNEL(X, bits), \ | |
1098 | BMC150_ACCEL_CHANNEL(Y, bits), \ | |
1099 | BMC150_ACCEL_CHANNEL(Z, bits), \ | |
1100 | IIO_CHAN_SOFT_TIMESTAMP(3), \ | |
1101 | } | |
1102 | ||
1103 | static const struct iio_chan_spec bma222e_accel_channels[] = | |
1104 | BMC150_ACCEL_CHANNELS(8); | |
1105 | static const struct iio_chan_spec bma250e_accel_channels[] = | |
1106 | BMC150_ACCEL_CHANNELS(10); | |
1107 | static const struct iio_chan_spec bmc150_accel_channels[] = | |
1108 | BMC150_ACCEL_CHANNELS(12); | |
1109 | static const struct iio_chan_spec bma280_accel_channels[] = | |
1110 | BMC150_ACCEL_CHANNELS(14); | |
1111 | ||
1112 | enum { | |
1113 | bmc150, | |
1114 | bmi055, | |
1115 | bma255, | |
1116 | bma250e, | |
1117 | bma222e, | |
1118 | bma280, | |
1119 | }; | |
1120 | ||
1121 | static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { | |
1122 | [bmc150] = { | |
1123 | .chip_id = 0xFA, | |
1124 | .channels = bmc150_accel_channels, | |
1125 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1126 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1127 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1128 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1129 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1130 | }, | |
1131 | [bmi055] = { | |
1132 | .chip_id = 0xFA, | |
1133 | .channels = bmc150_accel_channels, | |
1134 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1135 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1136 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1137 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1138 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1139 | }, | |
1140 | [bma255] = { | |
1141 | .chip_id = 0xFA, | |
1142 | .channels = bmc150_accel_channels, | |
1143 | .num_channels = ARRAY_SIZE(bmc150_accel_channels), | |
1144 | .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, | |
1145 | {19122, BMC150_ACCEL_DEF_RANGE_4G}, | |
1146 | {38344, BMC150_ACCEL_DEF_RANGE_8G}, | |
1147 | {76590, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1148 | }, | |
1149 | [bma250e] = { | |
1150 | .chip_id = 0xF9, | |
1151 | .channels = bma250e_accel_channels, | |
1152 | .num_channels = ARRAY_SIZE(bma250e_accel_channels), | |
1153 | .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, | |
1154 | {76590, BMC150_ACCEL_DEF_RANGE_4G}, | |
1155 | {153277, BMC150_ACCEL_DEF_RANGE_8G}, | |
1156 | {306457, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1157 | }, | |
1158 | [bma222e] = { | |
1159 | .chip_id = 0xF8, | |
1160 | .channels = bma222e_accel_channels, | |
1161 | .num_channels = ARRAY_SIZE(bma222e_accel_channels), | |
1162 | .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G}, | |
1163 | {306457, BMC150_ACCEL_DEF_RANGE_4G}, | |
1164 | {612915, BMC150_ACCEL_DEF_RANGE_8G}, | |
1165 | {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, | |
1166 | }, | |
1167 | [bma280] = { | |
1168 | .chip_id = 0xFB, | |
1169 | .channels = bma280_accel_channels, | |
1170 | .num_channels = ARRAY_SIZE(bma280_accel_channels), | |
1171 | .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G}, | |
1172 | {4785, BMC150_ACCEL_DEF_RANGE_4G}, | |
1173 | {9581, BMC150_ACCEL_DEF_RANGE_8G}, | |
1174 | {19152, BMC150_ACCEL_DEF_RANGE_16G} }, | |
bd7fe5b7 | 1175 | }, |
bd7fe5b7 SP |
1176 | }; |
1177 | ||
1178 | static const struct iio_info bmc150_accel_info = { | |
1179 | .attrs = &bmc150_accel_attrs_group, | |
1180 | .read_raw = bmc150_accel_read_raw, | |
1181 | .write_raw = bmc150_accel_write_raw, | |
1182 | .read_event_value = bmc150_accel_read_event, | |
1183 | .write_event_value = bmc150_accel_write_event, | |
1184 | .write_event_config = bmc150_accel_write_event_config, | |
1185 | .read_event_config = bmc150_accel_read_event_config, | |
1186 | .validate_trigger = bmc150_accel_validate_trigger, | |
1187 | .driver_module = THIS_MODULE, | |
1188 | }; | |
1189 | ||
3bbec977 OP |
1190 | static const struct iio_info bmc150_accel_info_fifo = { |
1191 | .attrs = &bmc150_accel_attrs_group, | |
1192 | .read_raw = bmc150_accel_read_raw, | |
1193 | .write_raw = bmc150_accel_write_raw, | |
1194 | .read_event_value = bmc150_accel_read_event, | |
1195 | .write_event_value = bmc150_accel_write_event, | |
1196 | .write_event_config = bmc150_accel_write_event_config, | |
1197 | .read_event_config = bmc150_accel_read_event_config, | |
1198 | .validate_trigger = bmc150_accel_validate_trigger, | |
1199 | .hwfifo_set_watermark = bmc150_accel_set_watermark, | |
1200 | .hwfifo_flush_to_buffer = bmc150_accel_fifo_flush, | |
1201 | .driver_module = THIS_MODULE, | |
1202 | }; | |
1203 | ||
bd7fe5b7 SP |
1204 | static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p) |
1205 | { | |
1206 | struct iio_poll_func *pf = p; | |
1207 | struct iio_dev *indio_dev = pf->indio_dev; | |
1208 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1209 | int bit, ret, i = 0; | |
1210 | ||
1211 | mutex_lock(&data->mutex); | |
70dddeee | 1212 | for_each_set_bit(bit, indio_dev->active_scan_mask, |
bd7fe5b7 SP |
1213 | indio_dev->masklength) { |
1214 | ret = i2c_smbus_read_word_data(data->client, | |
1215 | BMC150_ACCEL_AXIS_TO_REG(bit)); | |
1216 | if (ret < 0) { | |
1217 | mutex_unlock(&data->mutex); | |
1218 | goto err_read; | |
1219 | } | |
1220 | data->buffer[i++] = ret; | |
1221 | } | |
1222 | mutex_unlock(&data->mutex); | |
1223 | ||
1224 | iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, | |
1225 | data->timestamp); | |
1226 | err_read: | |
1227 | iio_trigger_notify_done(indio_dev->trig); | |
1228 | ||
1229 | return IRQ_HANDLED; | |
1230 | } | |
1231 | ||
1232 | static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) | |
1233 | { | |
7d963215 OP |
1234 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
1235 | struct bmc150_accel_data *data = t->data; | |
bd7fe5b7 SP |
1236 | int ret; |
1237 | ||
1238 | /* new data interrupts don't need ack */ | |
7d963215 | 1239 | if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY]) |
bd7fe5b7 SP |
1240 | return 0; |
1241 | ||
1242 | mutex_lock(&data->mutex); | |
1243 | /* clear any latched interrupt */ | |
1244 | ret = i2c_smbus_write_byte_data(data->client, | |
1245 | BMC150_ACCEL_REG_INT_RST_LATCH, | |
1246 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
1247 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
1248 | mutex_unlock(&data->mutex); | |
1249 | if (ret < 0) { | |
1250 | dev_err(&data->client->dev, | |
1251 | "Error writing reg_int_rst_latch\n"); | |
1252 | return ret; | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
7d963215 | 1258 | static int bmc150_accel_trigger_set_state(struct iio_trigger *trig, |
bd7fe5b7 SP |
1259 | bool state) |
1260 | { | |
7d963215 OP |
1261 | struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig); |
1262 | struct bmc150_accel_data *data = t->data; | |
bd7fe5b7 SP |
1263 | int ret; |
1264 | ||
1265 | mutex_lock(&data->mutex); | |
1266 | ||
7d963215 OP |
1267 | if (t->enabled == state) { |
1268 | mutex_unlock(&data->mutex); | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | if (t->setup) { | |
1273 | ret = t->setup(t, state); | |
1274 | if (ret < 0) { | |
14ee64f4 | 1275 | mutex_unlock(&data->mutex); |
7d963215 | 1276 | return ret; |
14ee64f4 OP |
1277 | } |
1278 | } | |
1279 | ||
7d963215 | 1280 | ret = bmc150_accel_set_interrupt(data, t->intr, state); |
bd7fe5b7 SP |
1281 | if (ret < 0) { |
1282 | mutex_unlock(&data->mutex); | |
1283 | return ret; | |
1284 | } | |
7d963215 OP |
1285 | |
1286 | t->enabled = state; | |
bd7fe5b7 SP |
1287 | |
1288 | mutex_unlock(&data->mutex); | |
1289 | ||
1290 | return ret; | |
1291 | } | |
1292 | ||
1293 | static const struct iio_trigger_ops bmc150_accel_trigger_ops = { | |
7d963215 | 1294 | .set_trigger_state = bmc150_accel_trigger_set_state, |
bd7fe5b7 SP |
1295 | .try_reenable = bmc150_accel_trig_try_reen, |
1296 | .owner = THIS_MODULE, | |
1297 | }; | |
1298 | ||
3bbec977 | 1299 | static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) |
bd7fe5b7 | 1300 | { |
bd7fe5b7 | 1301 | struct bmc150_accel_data *data = iio_priv(indio_dev); |
bd7fe5b7 | 1302 | int dir; |
3bbec977 | 1303 | int ret; |
bd7fe5b7 SP |
1304 | |
1305 | ret = i2c_smbus_read_byte_data(data->client, | |
1306 | BMC150_ACCEL_REG_INT_STATUS_2); | |
1307 | if (ret < 0) { | |
1308 | dev_err(&data->client->dev, "Error reading reg_int_status_2\n"); | |
3bbec977 | 1309 | return ret; |
bd7fe5b7 SP |
1310 | } |
1311 | ||
1312 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN) | |
1313 | dir = IIO_EV_DIR_FALLING; | |
1314 | else | |
1315 | dir = IIO_EV_DIR_RISING; | |
1316 | ||
8d5a9781 | 1317 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X) |
bd7fe5b7 SP |
1318 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, |
1319 | 0, | |
8d5a9781 | 1320 | IIO_MOD_X, |
bd7fe5b7 | 1321 | IIO_EV_TYPE_ROC, |
8d5a9781 SP |
1322 | dir), |
1323 | data->timestamp); | |
1324 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y) | |
1325 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1326 | 0, | |
1327 | IIO_MOD_Y, | |
1328 | IIO_EV_TYPE_ROC, | |
1329 | dir), | |
1330 | data->timestamp); | |
1331 | if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z) | |
1332 | iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1333 | 0, | |
1334 | IIO_MOD_Z, | |
1335 | IIO_EV_TYPE_ROC, | |
1336 | dir), | |
bd7fe5b7 | 1337 | data->timestamp); |
3bbec977 OP |
1338 | return ret; |
1339 | } | |
1340 | ||
1341 | static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private) | |
1342 | { | |
1343 | struct iio_dev *indio_dev = private; | |
1344 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1345 | bool ack = false; | |
1346 | int ret; | |
1347 | ||
1348 | mutex_lock(&data->mutex); | |
1349 | ||
1350 | if (data->fifo_mode) { | |
1351 | ret = __bmc150_accel_fifo_flush(indio_dev, | |
1352 | BMC150_ACCEL_FIFO_LENGTH, true); | |
1353 | if (ret > 0) | |
1354 | ack = true; | |
1355 | } | |
1356 | ||
1357 | if (data->ev_enable_state) { | |
1358 | ret = bmc150_accel_handle_roc_event(indio_dev); | |
1359 | if (ret > 0) | |
1360 | ack = true; | |
1361 | } | |
1362 | ||
1363 | if (ack) { | |
bd7fe5b7 SP |
1364 | ret = i2c_smbus_write_byte_data(data->client, |
1365 | BMC150_ACCEL_REG_INT_RST_LATCH, | |
1366 | BMC150_ACCEL_INT_MODE_LATCH_INT | | |
1367 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
3bbec977 OP |
1368 | if (ret) |
1369 | dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); | |
1370 | ret = IRQ_HANDLED; | |
1371 | } else { | |
1372 | ret = IRQ_NONE; | |
1373 | } | |
bd7fe5b7 | 1374 | |
3bbec977 OP |
1375 | mutex_unlock(&data->mutex); |
1376 | ||
1377 | return ret; | |
bd7fe5b7 SP |
1378 | } |
1379 | ||
3bbec977 | 1380 | static irqreturn_t bmc150_accel_irq_handler(int irq, void *private) |
bd7fe5b7 SP |
1381 | { |
1382 | struct iio_dev *indio_dev = private; | |
1383 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
3bbec977 | 1384 | bool ack = false; |
7d963215 | 1385 | int i; |
bd7fe5b7 | 1386 | |
3bbec977 | 1387 | data->old_timestamp = data->timestamp; |
bd7fe5b7 SP |
1388 | data->timestamp = iio_get_time_ns(); |
1389 | ||
7d963215 OP |
1390 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { |
1391 | if (data->triggers[i].enabled) { | |
1392 | iio_trigger_poll(data->triggers[i].indio_trig); | |
3bbec977 | 1393 | ack = true; |
7d963215 OP |
1394 | break; |
1395 | } | |
1396 | } | |
bd7fe5b7 | 1397 | |
3bbec977 | 1398 | if (data->ev_enable_state || data->fifo_mode) |
bd7fe5b7 | 1399 | return IRQ_WAKE_THREAD; |
3bbec977 OP |
1400 | |
1401 | if (ack) | |
bd7fe5b7 | 1402 | return IRQ_HANDLED; |
3bbec977 OP |
1403 | |
1404 | return IRQ_NONE; | |
bd7fe5b7 SP |
1405 | } |
1406 | ||
8ecbb3c3 | 1407 | static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data) |
bd7fe5b7 SP |
1408 | { |
1409 | const struct acpi_device_id *id; | |
8ecbb3c3 LP |
1410 | |
1411 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
1412 | ||
1413 | if (!id) | |
1414 | return NULL; | |
1415 | ||
1416 | *data = (int) id->driver_data; | |
1417 | ||
1418 | return dev_name(dev); | |
1419 | } | |
1420 | ||
1421 | static int bmc150_accel_gpio_probe(struct i2c_client *client, | |
1422 | struct bmc150_accel_data *data) | |
1423 | { | |
bd7fe5b7 SP |
1424 | struct device *dev; |
1425 | struct gpio_desc *gpio; | |
1426 | int ret; | |
1427 | ||
1428 | if (!client) | |
1429 | return -EINVAL; | |
1430 | ||
1431 | dev = &client->dev; | |
bd7fe5b7 SP |
1432 | |
1433 | /* data ready gpio interrupt pin */ | |
b457f53a | 1434 | gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0, GPIOD_IN); |
bd7fe5b7 | 1435 | if (IS_ERR(gpio)) { |
8ecbb3c3 | 1436 | dev_err(dev, "Failed: gpio get index\n"); |
bd7fe5b7 SP |
1437 | return PTR_ERR(gpio); |
1438 | } | |
1439 | ||
bd7fe5b7 SP |
1440 | ret = gpiod_to_irq(gpio); |
1441 | ||
1442 | dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); | |
1443 | ||
1444 | return ret; | |
1445 | } | |
1446 | ||
7d963215 OP |
1447 | static const struct { |
1448 | int intr; | |
1449 | const char *name; | |
1450 | int (*setup)(struct bmc150_accel_trigger *t, bool state); | |
1451 | } bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = { | |
1452 | { | |
1453 | .intr = 0, | |
1454 | .name = "%s-dev%d", | |
1455 | }, | |
1456 | { | |
1457 | .intr = 1, | |
1458 | .name = "%s-any-motion-dev%d", | |
1459 | .setup = bmc150_accel_any_motion_setup, | |
1460 | }, | |
1461 | }; | |
1462 | ||
1463 | static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data, | |
1464 | int from) | |
1465 | { | |
1466 | int i; | |
1467 | ||
1468 | for (i = from; i >= 0; i++) { | |
1469 | if (data->triggers[i].indio_trig) { | |
1470 | iio_trigger_unregister(data->triggers[i].indio_trig); | |
1471 | data->triggers[i].indio_trig = NULL; | |
1472 | } | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev, | |
1477 | struct bmc150_accel_data *data) | |
1478 | { | |
1479 | int i, ret; | |
1480 | ||
1481 | for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) { | |
1482 | struct bmc150_accel_trigger *t = &data->triggers[i]; | |
1483 | ||
1484 | t->indio_trig = devm_iio_trigger_alloc(&data->client->dev, | |
1485 | bmc150_accel_triggers[i].name, | |
1486 | indio_dev->name, | |
1487 | indio_dev->id); | |
1488 | if (!t->indio_trig) { | |
1489 | ret = -ENOMEM; | |
1490 | break; | |
1491 | } | |
1492 | ||
1493 | t->indio_trig->dev.parent = &data->client->dev; | |
1494 | t->indio_trig->ops = &bmc150_accel_trigger_ops; | |
1495 | t->intr = bmc150_accel_triggers[i].intr; | |
1496 | t->data = data; | |
1497 | t->setup = bmc150_accel_triggers[i].setup; | |
1498 | iio_trigger_set_drvdata(t->indio_trig, t); | |
1499 | ||
1500 | ret = iio_trigger_register(t->indio_trig); | |
1501 | if (ret) | |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | if (ret) | |
1506 | bmc150_accel_unregister_triggers(data, i - 1); | |
1507 | ||
1508 | return ret; | |
1509 | } | |
1510 | ||
3bbec977 OP |
1511 | #define BMC150_ACCEL_FIFO_MODE_STREAM 0x80 |
1512 | #define BMC150_ACCEL_FIFO_MODE_FIFO 0x40 | |
1513 | #define BMC150_ACCEL_FIFO_MODE_BYPASS 0x00 | |
1514 | ||
1515 | static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data) | |
1516 | { | |
1517 | u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1; | |
1518 | int ret; | |
1519 | ||
1520 | ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode); | |
1521 | if (ret < 0) { | |
1522 | dev_err(&data->client->dev, "Error writing reg_fifo_config1\n"); | |
1523 | return ret; | |
1524 | } | |
1525 | ||
1526 | if (!data->fifo_mode) | |
1527 | return 0; | |
1528 | ||
1529 | ret = i2c_smbus_write_byte_data(data->client, | |
1530 | BMC150_ACCEL_REG_FIFO_CONFIG0, | |
1531 | data->watermark); | |
1532 | if (ret < 0) | |
1533 | dev_err(&data->client->dev, "Error writing reg_fifo_config0\n"); | |
1534 | ||
1535 | return ret; | |
1536 | } | |
1537 | ||
1538 | static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev) | |
1539 | { | |
1540 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1541 | int ret = 0; | |
1542 | ||
1543 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) | |
1544 | return iio_triggered_buffer_postenable(indio_dev); | |
1545 | ||
1546 | mutex_lock(&data->mutex); | |
1547 | ||
1548 | if (!data->watermark) | |
1549 | goto out; | |
1550 | ||
1551 | ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, | |
1552 | true); | |
1553 | if (ret) | |
1554 | goto out; | |
1555 | ||
1556 | data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO; | |
1557 | ||
1558 | ret = bmc150_accel_fifo_set_mode(data); | |
1559 | if (ret) { | |
1560 | data->fifo_mode = 0; | |
1561 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, | |
1562 | false); | |
1563 | } | |
1564 | ||
1565 | out: | |
1566 | mutex_unlock(&data->mutex); | |
1567 | ||
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev) | |
1572 | { | |
1573 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1574 | ||
1575 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) | |
1576 | return iio_triggered_buffer_predisable(indio_dev); | |
1577 | ||
1578 | mutex_lock(&data->mutex); | |
1579 | ||
1580 | if (!data->fifo_mode) | |
1581 | goto out; | |
1582 | ||
1583 | bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false); | |
1584 | __bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false); | |
1585 | data->fifo_mode = 0; | |
1586 | bmc150_accel_fifo_set_mode(data); | |
1587 | ||
1588 | out: | |
1589 | mutex_unlock(&data->mutex); | |
1590 | ||
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = { | |
1595 | .postenable = bmc150_accel_buffer_postenable, | |
1596 | .predisable = bmc150_accel_buffer_predisable, | |
1597 | }; | |
1598 | ||
bd7fe5b7 SP |
1599 | static int bmc150_accel_probe(struct i2c_client *client, |
1600 | const struct i2c_device_id *id) | |
1601 | { | |
1602 | struct bmc150_accel_data *data; | |
1603 | struct iio_dev *indio_dev; | |
1604 | int ret; | |
8ecbb3c3 LP |
1605 | const char *name = NULL; |
1606 | int chip_id = 0; | |
bd7fe5b7 SP |
1607 | |
1608 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
1609 | if (!indio_dev) | |
1610 | return -ENOMEM; | |
1611 | ||
1612 | data = iio_priv(indio_dev); | |
1613 | i2c_set_clientdata(client, indio_dev); | |
1614 | data->client = client; | |
1615 | ||
8ecbb3c3 LP |
1616 | if (id) { |
1617 | name = id->name; | |
1618 | chip_id = id->driver_data; | |
1619 | } | |
1620 | ||
1621 | if (ACPI_HANDLE(&client->dev)) | |
1622 | name = bmc150_accel_match_acpi_device(&client->dev, &chip_id); | |
1623 | ||
1624 | data->chip_info = &bmc150_accel_chip_info_tbl[chip_id]; | |
1625 | ||
bd7fe5b7 SP |
1626 | ret = bmc150_accel_chip_init(data); |
1627 | if (ret < 0) | |
1628 | return ret; | |
1629 | ||
1630 | mutex_init(&data->mutex); | |
1631 | ||
1632 | indio_dev->dev.parent = &client->dev; | |
8ecbb3c3 LP |
1633 | indio_dev->channels = data->chip_info->channels; |
1634 | indio_dev->num_channels = data->chip_info->num_channels; | |
1635 | indio_dev->name = name; | |
bd7fe5b7 SP |
1636 | indio_dev->modes = INDIO_DIRECT_MODE; |
1637 | indio_dev->info = &bmc150_accel_info; | |
1638 | ||
1639 | if (client->irq < 0) | |
8ecbb3c3 | 1640 | client->irq = bmc150_accel_gpio_probe(client, data); |
bd7fe5b7 SP |
1641 | |
1642 | if (client->irq >= 0) { | |
1643 | ret = devm_request_threaded_irq( | |
1644 | &client->dev, client->irq, | |
3bbec977 OP |
1645 | bmc150_accel_irq_handler, |
1646 | bmc150_accel_irq_thread_handler, | |
bd7fe5b7 SP |
1647 | IRQF_TRIGGER_RISING, |
1648 | BMC150_ACCEL_IRQ_NAME, | |
1649 | indio_dev); | |
1650 | if (ret) | |
1651 | return ret; | |
1652 | ||
8e22f477 OP |
1653 | /* |
1654 | * Set latched mode interrupt. While certain interrupts are | |
1655 | * non-latched regardless of this settings (e.g. new data) we | |
1656 | * want to use latch mode when we can to prevent interrupt | |
1657 | * flooding. | |
1658 | */ | |
1659 | ret = i2c_smbus_write_byte_data(data->client, | |
1660 | BMC150_ACCEL_REG_INT_RST_LATCH, | |
1661 | BMC150_ACCEL_INT_MODE_LATCH_RESET); | |
1662 | if (ret < 0) { | |
1663 | dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); | |
1664 | return ret; | |
1665 | } | |
1666 | ||
3e825ec9 OP |
1667 | bmc150_accel_interrupts_setup(indio_dev, data); |
1668 | ||
7d963215 | 1669 | ret = bmc150_accel_triggers_setup(indio_dev, data); |
bd7fe5b7 SP |
1670 | if (ret) |
1671 | return ret; | |
1672 | ||
bd7fe5b7 SP |
1673 | ret = iio_triggered_buffer_setup(indio_dev, |
1674 | &iio_pollfunc_store_time, | |
1675 | bmc150_accel_trigger_handler, | |
3bbec977 | 1676 | &bmc150_accel_buffer_ops); |
bd7fe5b7 SP |
1677 | if (ret < 0) { |
1678 | dev_err(&client->dev, | |
1679 | "Failed: iio triggered buffer setup\n"); | |
1680 | goto err_trigger_unregister; | |
1681 | } | |
3bbec977 OP |
1682 | |
1683 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) || | |
1684 | i2c_check_functionality(client->adapter, | |
1685 | I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { | |
1686 | indio_dev->modes |= INDIO_BUFFER_SOFTWARE; | |
1687 | indio_dev->info = &bmc150_accel_info_fifo; | |
1688 | indio_dev->buffer->attrs = bmc150_accel_fifo_attributes; | |
1689 | } | |
bd7fe5b7 SP |
1690 | } |
1691 | ||
1692 | ret = iio_device_register(indio_dev); | |
1693 | if (ret < 0) { | |
1694 | dev_err(&client->dev, "Unable to register iio device\n"); | |
1695 | goto err_buffer_cleanup; | |
1696 | } | |
1697 | ||
1698 | ret = pm_runtime_set_active(&client->dev); | |
1699 | if (ret) | |
1700 | goto err_iio_unregister; | |
1701 | ||
1702 | pm_runtime_enable(&client->dev); | |
1703 | pm_runtime_set_autosuspend_delay(&client->dev, | |
1704 | BMC150_AUTO_SUSPEND_DELAY_MS); | |
1705 | pm_runtime_use_autosuspend(&client->dev); | |
1706 | ||
1707 | return 0; | |
1708 | ||
1709 | err_iio_unregister: | |
1710 | iio_device_unregister(indio_dev); | |
1711 | err_buffer_cleanup: | |
7d963215 | 1712 | if (indio_dev->pollfunc) |
bd7fe5b7 SP |
1713 | iio_triggered_buffer_cleanup(indio_dev); |
1714 | err_trigger_unregister: | |
7d963215 | 1715 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
bd7fe5b7 SP |
1716 | |
1717 | return ret; | |
1718 | } | |
1719 | ||
1720 | static int bmc150_accel_remove(struct i2c_client *client) | |
1721 | { | |
1722 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
1723 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1724 | ||
1725 | pm_runtime_disable(&client->dev); | |
1726 | pm_runtime_set_suspended(&client->dev); | |
1727 | pm_runtime_put_noidle(&client->dev); | |
1728 | ||
1729 | iio_device_unregister(indio_dev); | |
1730 | ||
7d963215 | 1731 | bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1); |
bd7fe5b7 SP |
1732 | |
1733 | mutex_lock(&data->mutex); | |
1734 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0); | |
1735 | mutex_unlock(&data->mutex); | |
1736 | ||
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | #ifdef CONFIG_PM_SLEEP | |
1741 | static int bmc150_accel_suspend(struct device *dev) | |
1742 | { | |
1743 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1744 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1745 | ||
1746 | mutex_lock(&data->mutex); | |
1747 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); | |
1748 | mutex_unlock(&data->mutex); | |
1749 | ||
1750 | return 0; | |
1751 | } | |
1752 | ||
1753 | static int bmc150_accel_resume(struct device *dev) | |
1754 | { | |
1755 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1756 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1757 | ||
1758 | mutex_lock(&data->mutex); | |
3e825ec9 | 1759 | if (atomic_read(&data->active_intr)) |
bd7fe5b7 | 1760 | bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); |
3bbec977 | 1761 | bmc150_accel_fifo_set_mode(data); |
bd7fe5b7 SP |
1762 | mutex_unlock(&data->mutex); |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | #endif | |
1767 | ||
6f0a13f2 | 1768 | #ifdef CONFIG_PM |
bd7fe5b7 SP |
1769 | static int bmc150_accel_runtime_suspend(struct device *dev) |
1770 | { | |
1771 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1772 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
aaeecd80 | 1773 | int ret; |
bd7fe5b7 SP |
1774 | |
1775 | dev_dbg(&data->client->dev, __func__); | |
aaeecd80 SP |
1776 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0); |
1777 | if (ret < 0) | |
1778 | return -EAGAIN; | |
bd7fe5b7 | 1779 | |
aaeecd80 | 1780 | return 0; |
bd7fe5b7 SP |
1781 | } |
1782 | ||
1783 | static int bmc150_accel_runtime_resume(struct device *dev) | |
1784 | { | |
1785 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1786 | struct bmc150_accel_data *data = iio_priv(indio_dev); | |
1787 | int ret; | |
1788 | int sleep_val; | |
1789 | ||
1790 | dev_dbg(&data->client->dev, __func__); | |
1791 | ||
1792 | ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0); | |
3bbec977 OP |
1793 | if (ret < 0) |
1794 | return ret; | |
1795 | ret = bmc150_accel_fifo_set_mode(data); | |
bd7fe5b7 SP |
1796 | if (ret < 0) |
1797 | return ret; | |
1798 | ||
1799 | sleep_val = bmc150_accel_get_startup_times(data); | |
1800 | if (sleep_val < 20) | |
1801 | usleep_range(sleep_val * 1000, 20000); | |
1802 | else | |
1803 | msleep_interruptible(sleep_val); | |
1804 | ||
1805 | return 0; | |
1806 | } | |
1807 | #endif | |
1808 | ||
1809 | static const struct dev_pm_ops bmc150_accel_pm_ops = { | |
1810 | SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume) | |
1811 | SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend, | |
1812 | bmc150_accel_runtime_resume, NULL) | |
1813 | }; | |
1814 | ||
1815 | static const struct acpi_device_id bmc150_accel_acpi_match[] = { | |
8ecbb3c3 LP |
1816 | {"BSBA0150", bmc150}, |
1817 | {"BMC150A", bmc150}, | |
1818 | {"BMI055A", bmi055}, | |
1819 | {"BMA0255", bma255}, | |
1820 | {"BMA250E", bma250e}, | |
1821 | {"BMA222E", bma222e}, | |
1822 | {"BMA0280", bma280}, | |
bd7fe5b7 SP |
1823 | { }, |
1824 | }; | |
1825 | MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match); | |
1826 | ||
1827 | static const struct i2c_device_id bmc150_accel_id[] = { | |
8ecbb3c3 LP |
1828 | {"bmc150_accel", bmc150}, |
1829 | {"bmi055_accel", bmi055}, | |
1830 | {"bma255", bma255}, | |
1831 | {"bma250e", bma250e}, | |
1832 | {"bma222e", bma222e}, | |
1833 | {"bma280", bma280}, | |
bd7fe5b7 SP |
1834 | {} |
1835 | }; | |
1836 | ||
1837 | MODULE_DEVICE_TABLE(i2c, bmc150_accel_id); | |
1838 | ||
1839 | static struct i2c_driver bmc150_accel_driver = { | |
1840 | .driver = { | |
1841 | .name = BMC150_ACCEL_DRV_NAME, | |
1842 | .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match), | |
1843 | .pm = &bmc150_accel_pm_ops, | |
1844 | }, | |
1845 | .probe = bmc150_accel_probe, | |
1846 | .remove = bmc150_accel_remove, | |
1847 | .id_table = bmc150_accel_id, | |
1848 | }; | |
1849 | module_i2c_driver(bmc150_accel_driver); | |
1850 | ||
1851 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); | |
1852 | MODULE_LICENSE("GPL v2"); | |
1853 | MODULE_DESCRIPTION("BMC150 accelerometer driver"); |