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1 | /* | |
2 | * mma8452.c - Support for following Freescale / NXP 3-axis accelerometers: | |
3 | * | |
4 | * device name digital output 7-bit I2C slave address (pin selectable) | |
5 | * --------------------------------------------------------------------- | |
6 | * MMA8451Q 14 bit 0x1c / 0x1d | |
7 | * MMA8452Q 12 bit 0x1c / 0x1d | |
8 | * MMA8453Q 10 bit 0x1c / 0x1d | |
9 | * MMA8652FC 12 bit 0x1d | |
10 | * MMA8653FC 10 bit 0x1d | |
11 | * FXLS8471Q 14 bit 0x1e / 0x1d / 0x1c / 0x1f | |
12 | * | |
13 | * Copyright 2015 Martin Kepplinger <martink@posteo.de> | |
14 | * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net> | |
15 | * | |
16 | * This file is subject to the terms and conditions of version 2 of | |
17 | * the GNU General Public License. See the file COPYING in the main | |
18 | * directory of this archive for more details. | |
19 | * | |
20 | * TODO: orientation events | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/iio/iio.h> | |
26 | #include <linux/iio/sysfs.h> | |
27 | #include <linux/iio/buffer.h> | |
28 | #include <linux/iio/trigger.h> | |
29 | #include <linux/iio/trigger_consumer.h> | |
30 | #include <linux/iio/triggered_buffer.h> | |
31 | #include <linux/iio/events.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/of_device.h> | |
34 | #include <linux/of_irq.h> | |
35 | #include <linux/pm_runtime.h> | |
36 | ||
37 | #define MMA8452_STATUS 0x00 | |
38 | #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) | |
39 | #define MMA8452_OUT_X 0x01 /* MSB first */ | |
40 | #define MMA8452_OUT_Y 0x03 | |
41 | #define MMA8452_OUT_Z 0x05 | |
42 | #define MMA8452_INT_SRC 0x0c | |
43 | #define MMA8452_WHO_AM_I 0x0d | |
44 | #define MMA8452_DATA_CFG 0x0e | |
45 | #define MMA8452_DATA_CFG_FS_MASK GENMASK(1, 0) | |
46 | #define MMA8452_DATA_CFG_FS_2G 0 | |
47 | #define MMA8452_DATA_CFG_FS_4G 1 | |
48 | #define MMA8452_DATA_CFG_FS_8G 2 | |
49 | #define MMA8452_DATA_CFG_HPF_MASK BIT(4) | |
50 | #define MMA8452_HP_FILTER_CUTOFF 0x0f | |
51 | #define MMA8452_HP_FILTER_CUTOFF_SEL_MASK GENMASK(1, 0) | |
52 | #define MMA8452_FF_MT_CFG 0x15 | |
53 | #define MMA8452_FF_MT_CFG_OAE BIT(6) | |
54 | #define MMA8452_FF_MT_CFG_ELE BIT(7) | |
55 | #define MMA8452_FF_MT_SRC 0x16 | |
56 | #define MMA8452_FF_MT_SRC_XHE BIT(1) | |
57 | #define MMA8452_FF_MT_SRC_YHE BIT(3) | |
58 | #define MMA8452_FF_MT_SRC_ZHE BIT(5) | |
59 | #define MMA8452_FF_MT_THS 0x17 | |
60 | #define MMA8452_FF_MT_THS_MASK 0x7f | |
61 | #define MMA8452_FF_MT_COUNT 0x18 | |
62 | #define MMA8452_FF_MT_CHAN_SHIFT 3 | |
63 | #define MMA8452_TRANSIENT_CFG 0x1d | |
64 | #define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1) | |
65 | #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) | |
66 | #define MMA8452_TRANSIENT_CFG_ELE BIT(4) | |
67 | #define MMA8452_TRANSIENT_SRC 0x1e | |
68 | #define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1) | |
69 | #define MMA8452_TRANSIENT_SRC_YTRANSE BIT(3) | |
70 | #define MMA8452_TRANSIENT_SRC_ZTRANSE BIT(5) | |
71 | #define MMA8452_TRANSIENT_THS 0x1f | |
72 | #define MMA8452_TRANSIENT_THS_MASK GENMASK(6, 0) | |
73 | #define MMA8452_TRANSIENT_COUNT 0x20 | |
74 | #define MMA8452_TRANSIENT_CHAN_SHIFT 1 | |
75 | #define MMA8452_CTRL_REG1 0x2a | |
76 | #define MMA8452_CTRL_ACTIVE BIT(0) | |
77 | #define MMA8452_CTRL_DR_MASK GENMASK(5, 3) | |
78 | #define MMA8452_CTRL_DR_SHIFT 3 | |
79 | #define MMA8452_CTRL_DR_DEFAULT 0x4 /* 50 Hz sample frequency */ | |
80 | #define MMA8452_CTRL_REG2 0x2b | |
81 | #define MMA8452_CTRL_REG2_RST BIT(6) | |
82 | #define MMA8452_CTRL_REG2_MODS_SHIFT 3 | |
83 | #define MMA8452_CTRL_REG2_MODS_MASK 0x1b | |
84 | #define MMA8452_CTRL_REG4 0x2d | |
85 | #define MMA8452_CTRL_REG5 0x2e | |
86 | #define MMA8452_OFF_X 0x2f | |
87 | #define MMA8452_OFF_Y 0x30 | |
88 | #define MMA8452_OFF_Z 0x31 | |
89 | ||
90 | #define MMA8452_MAX_REG 0x31 | |
91 | ||
92 | #define MMA8452_INT_DRDY BIT(0) | |
93 | #define MMA8452_INT_FF_MT BIT(2) | |
94 | #define MMA8452_INT_TRANS BIT(5) | |
95 | ||
96 | #define MMA8451_DEVICE_ID 0x1a | |
97 | #define MMA8452_DEVICE_ID 0x2a | |
98 | #define MMA8453_DEVICE_ID 0x3a | |
99 | #define MMA8652_DEVICE_ID 0x4a | |
100 | #define MMA8653_DEVICE_ID 0x5a | |
101 | #define FXLS8471_DEVICE_ID 0x6a | |
102 | ||
103 | #define MMA8452_AUTO_SUSPEND_DELAY_MS 2000 | |
104 | ||
105 | struct mma8452_data { | |
106 | struct i2c_client *client; | |
107 | struct mutex lock; | |
108 | u8 ctrl_reg1; | |
109 | u8 data_cfg; | |
110 | const struct mma_chip_info *chip_info; | |
111 | }; | |
112 | ||
113 | /** | |
114 | * struct mma8452_event_regs - chip specific data related to events | |
115 | * @ev_cfg: event config register address | |
116 | * @ev_cfg_ele: latch bit in event config register | |
117 | * @ev_cfg_chan_shift: number of the bit to enable events in X | |
118 | * direction; in event config register | |
119 | * @ev_src: event source register address | |
120 | * @ev_ths: event threshold register address | |
121 | * @ev_ths_mask: mask for the threshold value | |
122 | * @ev_count: event count (period) register address | |
123 | * | |
124 | * Since not all chips supported by the driver support comparing high pass | |
125 | * filtered data for events (interrupts), different interrupt sources are | |
126 | * used for different chips and the relevant registers are included here. | |
127 | */ | |
128 | struct mma8452_event_regs { | |
129 | u8 ev_cfg; | |
130 | u8 ev_cfg_ele; | |
131 | u8 ev_cfg_chan_shift; | |
132 | u8 ev_src; | |
133 | u8 ev_ths; | |
134 | u8 ev_ths_mask; | |
135 | u8 ev_count; | |
136 | }; | |
137 | ||
138 | static const struct mma8452_event_regs ev_regs_accel_falling = { | |
139 | .ev_cfg = MMA8452_FF_MT_CFG, | |
140 | .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE, | |
141 | .ev_cfg_chan_shift = MMA8452_FF_MT_CHAN_SHIFT, | |
142 | .ev_src = MMA8452_FF_MT_SRC, | |
143 | .ev_ths = MMA8452_FF_MT_THS, | |
144 | .ev_ths_mask = MMA8452_FF_MT_THS_MASK, | |
145 | .ev_count = MMA8452_FF_MT_COUNT | |
146 | }; | |
147 | ||
148 | static const struct mma8452_event_regs ev_regs_accel_rising = { | |
149 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
150 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
151 | .ev_cfg_chan_shift = MMA8452_TRANSIENT_CHAN_SHIFT, | |
152 | .ev_src = MMA8452_TRANSIENT_SRC, | |
153 | .ev_ths = MMA8452_TRANSIENT_THS, | |
154 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
155 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
156 | }; | |
157 | ||
158 | /** | |
159 | * struct mma_chip_info - chip specific data | |
160 | * @chip_id: WHO_AM_I register's value | |
161 | * @channels: struct iio_chan_spec matching the device's | |
162 | * capabilities | |
163 | * @num_channels: number of channels | |
164 | * @mma_scales: scale factors for converting register values | |
165 | * to m/s^2; 3 modes: 2g, 4g, 8g; 2 integers | |
166 | * per mode: m/s^2 and micro m/s^2 | |
167 | * @all_events: all events supported by this chip | |
168 | * @enabled_events: event flags enabled and handled by this driver | |
169 | */ | |
170 | struct mma_chip_info { | |
171 | u8 chip_id; | |
172 | const struct iio_chan_spec *channels; | |
173 | int num_channels; | |
174 | const int mma_scales[3][2]; | |
175 | int all_events; | |
176 | int enabled_events; | |
177 | }; | |
178 | ||
179 | enum { | |
180 | idx_x, | |
181 | idx_y, | |
182 | idx_z, | |
183 | idx_ts, | |
184 | }; | |
185 | ||
186 | static int mma8452_drdy(struct mma8452_data *data) | |
187 | { | |
188 | int tries = 150; | |
189 | ||
190 | while (tries-- > 0) { | |
191 | int ret = i2c_smbus_read_byte_data(data->client, | |
192 | MMA8452_STATUS); | |
193 | if (ret < 0) | |
194 | return ret; | |
195 | if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY) | |
196 | return 0; | |
197 | ||
198 | msleep(20); | |
199 | } | |
200 | ||
201 | dev_err(&data->client->dev, "data not ready\n"); | |
202 | ||
203 | return -EIO; | |
204 | } | |
205 | ||
206 | static int mma8452_set_runtime_pm_state(struct i2c_client *client, bool on) | |
207 | { | |
208 | #ifdef CONFIG_PM | |
209 | int ret; | |
210 | ||
211 | if (on) { | |
212 | ret = pm_runtime_get_sync(&client->dev); | |
213 | } else { | |
214 | pm_runtime_mark_last_busy(&client->dev); | |
215 | ret = pm_runtime_put_autosuspend(&client->dev); | |
216 | } | |
217 | ||
218 | if (ret < 0) { | |
219 | dev_err(&client->dev, | |
220 | "failed to change power state to %d\n", on); | |
221 | if (on) | |
222 | pm_runtime_put_noidle(&client->dev); | |
223 | ||
224 | return ret; | |
225 | } | |
226 | #endif | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) | |
232 | { | |
233 | int ret = mma8452_drdy(data); | |
234 | ||
235 | if (ret < 0) | |
236 | return ret; | |
237 | ||
238 | ret = mma8452_set_runtime_pm_state(data->client, true); | |
239 | if (ret) | |
240 | return ret; | |
241 | ||
242 | ret = i2c_smbus_read_i2c_block_data(data->client, MMA8452_OUT_X, | |
243 | 3 * sizeof(__be16), (u8 *)buf); | |
244 | ||
245 | ret = mma8452_set_runtime_pm_state(data->client, false); | |
246 | ||
247 | return ret; | |
248 | } | |
249 | ||
250 | static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2], | |
251 | int n) | |
252 | { | |
253 | size_t len = 0; | |
254 | ||
255 | while (n-- > 0) | |
256 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", | |
257 | vals[n][0], vals[n][1]); | |
258 | ||
259 | /* replace trailing space by newline */ | |
260 | buf[len - 1] = '\n'; | |
261 | ||
262 | return len; | |
263 | } | |
264 | ||
265 | static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n, | |
266 | int val, int val2) | |
267 | { | |
268 | while (n-- > 0) | |
269 | if (val == vals[n][0] && val2 == vals[n][1]) | |
270 | return n; | |
271 | ||
272 | return -EINVAL; | |
273 | } | |
274 | ||
275 | static unsigned int mma8452_get_odr_index(struct mma8452_data *data) | |
276 | { | |
277 | return (data->ctrl_reg1 & MMA8452_CTRL_DR_MASK) >> | |
278 | MMA8452_CTRL_DR_SHIFT; | |
279 | } | |
280 | ||
281 | static const int mma8452_samp_freq[8][2] = { | |
282 | {800, 0}, {400, 0}, {200, 0}, {100, 0}, {50, 0}, {12, 500000}, | |
283 | {6, 250000}, {1, 560000} | |
284 | }; | |
285 | ||
286 | /* Datasheet table: step time "Relationship with the ODR" (sample frequency) */ | |
287 | static const unsigned int mma8452_transient_time_step_us[4][8] = { | |
288 | { 1250, 2500, 5000, 10000, 20000, 20000, 20000, 20000 }, /* normal */ | |
289 | { 1250, 2500, 5000, 10000, 20000, 80000, 80000, 80000 }, /* l p l n */ | |
290 | { 1250, 2500, 2500, 2500, 2500, 2500, 2500, 2500 }, /* high res*/ | |
291 | { 1250, 2500, 5000, 10000, 20000, 80000, 160000, 160000 } /* l p */ | |
292 | }; | |
293 | ||
294 | /* Datasheet table "High-Pass Filter Cutoff Options" */ | |
295 | static const int mma8452_hp_filter_cutoff[4][8][4][2] = { | |
296 | { /* normal */ | |
297 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 800 Hz sample */ | |
298 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 400 Hz sample */ | |
299 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, /* 200 Hz sample */ | |
300 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, /* 100 Hz sample */ | |
301 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 50 Hz sample */ | |
302 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 12.5 Hz sample */ | |
303 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 6.25 Hz sample */ | |
304 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} } /* 1.56 Hz sample */ | |
305 | }, | |
306 | { /* low noise low power */ | |
307 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
308 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
309 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, | |
310 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, | |
311 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, | |
312 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} }, | |
313 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} }, | |
314 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} } | |
315 | }, | |
316 | { /* high resolution */ | |
317 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
318 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
319 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
320 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
321 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
322 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
323 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
324 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} } | |
325 | }, | |
326 | { /* low power */ | |
327 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
328 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, | |
329 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, | |
330 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, | |
331 | { {1, 0}, {0, 500000}, {0, 250000}, {0, 125000} }, | |
332 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} }, | |
333 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} }, | |
334 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} } | |
335 | } | |
336 | }; | |
337 | ||
338 | /* Datasheet table "MODS Oversampling modes averaging values at each ODR" */ | |
339 | static const u16 mma8452_os_ratio[4][8] = { | |
340 | /* 800 Hz, 400 Hz, ... , 1.56 Hz */ | |
341 | { 2, 4, 4, 4, 4, 16, 32, 128 }, /* normal */ | |
342 | { 2, 4, 4, 4, 4, 4, 8, 32 }, /* low power low noise */ | |
343 | { 2, 4, 8, 16, 32, 128, 256, 1024 }, /* high resolution */ | |
344 | { 2, 2, 2, 2, 2, 2, 4, 16 } /* low power */ | |
345 | }; | |
346 | ||
347 | static int mma8452_get_power_mode(struct mma8452_data *data) | |
348 | { | |
349 | int reg; | |
350 | ||
351 | reg = i2c_smbus_read_byte_data(data->client, | |
352 | MMA8452_CTRL_REG2); | |
353 | if (reg < 0) | |
354 | return reg; | |
355 | ||
356 | return ((reg & MMA8452_CTRL_REG2_MODS_MASK) >> | |
357 | MMA8452_CTRL_REG2_MODS_SHIFT); | |
358 | } | |
359 | ||
360 | static ssize_t mma8452_show_samp_freq_avail(struct device *dev, | |
361 | struct device_attribute *attr, | |
362 | char *buf) | |
363 | { | |
364 | return mma8452_show_int_plus_micros(buf, mma8452_samp_freq, | |
365 | ARRAY_SIZE(mma8452_samp_freq)); | |
366 | } | |
367 | ||
368 | static ssize_t mma8452_show_scale_avail(struct device *dev, | |
369 | struct device_attribute *attr, | |
370 | char *buf) | |
371 | { | |
372 | struct mma8452_data *data = iio_priv(i2c_get_clientdata( | |
373 | to_i2c_client(dev))); | |
374 | ||
375 | return mma8452_show_int_plus_micros(buf, data->chip_info->mma_scales, | |
376 | ARRAY_SIZE(data->chip_info->mma_scales)); | |
377 | } | |
378 | ||
379 | static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev, | |
380 | struct device_attribute *attr, | |
381 | char *buf) | |
382 | { | |
383 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
384 | struct mma8452_data *data = iio_priv(indio_dev); | |
385 | int i, j; | |
386 | ||
387 | i = mma8452_get_odr_index(data); | |
388 | j = mma8452_get_power_mode(data); | |
389 | if (j < 0) | |
390 | return j; | |
391 | ||
392 | return mma8452_show_int_plus_micros(buf, mma8452_hp_filter_cutoff[j][i], | |
393 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0])); | |
394 | } | |
395 | ||
396 | static ssize_t mma8452_show_os_ratio_avail(struct device *dev, | |
397 | struct device_attribute *attr, | |
398 | char *buf) | |
399 | { | |
400 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
401 | struct mma8452_data *data = iio_priv(indio_dev); | |
402 | int i = mma8452_get_odr_index(data); | |
403 | int j; | |
404 | u16 val = 0; | |
405 | size_t len = 0; | |
406 | ||
407 | for (j = 0; j < ARRAY_SIZE(mma8452_os_ratio); j++) { | |
408 | if (val == mma8452_os_ratio[j][i]) | |
409 | continue; | |
410 | ||
411 | val = mma8452_os_ratio[j][i]; | |
412 | ||
413 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", val); | |
414 | } | |
415 | buf[len - 1] = '\n'; | |
416 | ||
417 | return len; | |
418 | } | |
419 | ||
420 | static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail); | |
421 | static IIO_DEVICE_ATTR(in_accel_scale_available, 0444, | |
422 | mma8452_show_scale_avail, NULL, 0); | |
423 | static IIO_DEVICE_ATTR(in_accel_filter_high_pass_3db_frequency_available, | |
424 | 0444, mma8452_show_hp_cutoff_avail, NULL, 0); | |
425 | static IIO_DEVICE_ATTR(in_accel_oversampling_ratio_available, 0444, | |
426 | mma8452_show_os_ratio_avail, NULL, 0); | |
427 | ||
428 | static int mma8452_get_samp_freq_index(struct mma8452_data *data, | |
429 | int val, int val2) | |
430 | { | |
431 | return mma8452_get_int_plus_micros_index(mma8452_samp_freq, | |
432 | ARRAY_SIZE(mma8452_samp_freq), | |
433 | val, val2); | |
434 | } | |
435 | ||
436 | static int mma8452_get_scale_index(struct mma8452_data *data, int val, int val2) | |
437 | { | |
438 | return mma8452_get_int_plus_micros_index(data->chip_info->mma_scales, | |
439 | ARRAY_SIZE(data->chip_info->mma_scales), val, val2); | |
440 | } | |
441 | ||
442 | static int mma8452_get_hp_filter_index(struct mma8452_data *data, | |
443 | int val, int val2) | |
444 | { | |
445 | int i, j; | |
446 | ||
447 | i = mma8452_get_odr_index(data); | |
448 | j = mma8452_get_power_mode(data); | |
449 | if (j < 0) | |
450 | return j; | |
451 | ||
452 | return mma8452_get_int_plus_micros_index(mma8452_hp_filter_cutoff[j][i], | |
453 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0]), val, val2); | |
454 | } | |
455 | ||
456 | static int mma8452_read_hp_filter(struct mma8452_data *data, int *hz, int *uHz) | |
457 | { | |
458 | int j, i, ret; | |
459 | ||
460 | ret = i2c_smbus_read_byte_data(data->client, MMA8452_HP_FILTER_CUTOFF); | |
461 | if (ret < 0) | |
462 | return ret; | |
463 | ||
464 | i = mma8452_get_odr_index(data); | |
465 | j = mma8452_get_power_mode(data); | |
466 | if (j < 0) | |
467 | return j; | |
468 | ||
469 | ret &= MMA8452_HP_FILTER_CUTOFF_SEL_MASK; | |
470 | *hz = mma8452_hp_filter_cutoff[j][i][ret][0]; | |
471 | *uHz = mma8452_hp_filter_cutoff[j][i][ret][1]; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static int mma8452_read_raw(struct iio_dev *indio_dev, | |
477 | struct iio_chan_spec const *chan, | |
478 | int *val, int *val2, long mask) | |
479 | { | |
480 | struct mma8452_data *data = iio_priv(indio_dev); | |
481 | __be16 buffer[3]; | |
482 | int i, ret; | |
483 | ||
484 | switch (mask) { | |
485 | case IIO_CHAN_INFO_RAW: | |
486 | ret = iio_device_claim_direct_mode(indio_dev); | |
487 | if (ret) | |
488 | return ret; | |
489 | ||
490 | mutex_lock(&data->lock); | |
491 | ret = mma8452_read(data, buffer); | |
492 | mutex_unlock(&data->lock); | |
493 | iio_device_release_direct_mode(indio_dev); | |
494 | if (ret < 0) | |
495 | return ret; | |
496 | ||
497 | *val = sign_extend32(be16_to_cpu( | |
498 | buffer[chan->scan_index]) >> chan->scan_type.shift, | |
499 | chan->scan_type.realbits - 1); | |
500 | ||
501 | return IIO_VAL_INT; | |
502 | case IIO_CHAN_INFO_SCALE: | |
503 | i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK; | |
504 | *val = data->chip_info->mma_scales[i][0]; | |
505 | *val2 = data->chip_info->mma_scales[i][1]; | |
506 | ||
507 | return IIO_VAL_INT_PLUS_MICRO; | |
508 | case IIO_CHAN_INFO_SAMP_FREQ: | |
509 | i = mma8452_get_odr_index(data); | |
510 | *val = mma8452_samp_freq[i][0]; | |
511 | *val2 = mma8452_samp_freq[i][1]; | |
512 | ||
513 | return IIO_VAL_INT_PLUS_MICRO; | |
514 | case IIO_CHAN_INFO_CALIBBIAS: | |
515 | ret = i2c_smbus_read_byte_data(data->client, | |
516 | MMA8452_OFF_X + | |
517 | chan->scan_index); | |
518 | if (ret < 0) | |
519 | return ret; | |
520 | ||
521 | *val = sign_extend32(ret, 7); | |
522 | ||
523 | return IIO_VAL_INT; | |
524 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: | |
525 | if (data->data_cfg & MMA8452_DATA_CFG_HPF_MASK) { | |
526 | ret = mma8452_read_hp_filter(data, val, val2); | |
527 | if (ret < 0) | |
528 | return ret; | |
529 | } else { | |
530 | *val = 0; | |
531 | *val2 = 0; | |
532 | } | |
533 | ||
534 | return IIO_VAL_INT_PLUS_MICRO; | |
535 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: | |
536 | ret = mma8452_get_power_mode(data); | |
537 | if (ret < 0) | |
538 | return ret; | |
539 | ||
540 | i = mma8452_get_odr_index(data); | |
541 | ||
542 | *val = mma8452_os_ratio[ret][i]; | |
543 | return IIO_VAL_INT; | |
544 | } | |
545 | ||
546 | return -EINVAL; | |
547 | } | |
548 | ||
549 | static int mma8452_standby(struct mma8452_data *data) | |
550 | { | |
551 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
552 | data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE); | |
553 | } | |
554 | ||
555 | static int mma8452_active(struct mma8452_data *data) | |
556 | { | |
557 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
558 | data->ctrl_reg1); | |
559 | } | |
560 | ||
561 | /* returns >0 if active, 0 if in standby and <0 on error */ | |
562 | static int mma8452_is_active(struct mma8452_data *data) | |
563 | { | |
564 | int reg; | |
565 | ||
566 | reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG1); | |
567 | if (reg < 0) | |
568 | return reg; | |
569 | ||
570 | return reg & MMA8452_CTRL_ACTIVE; | |
571 | } | |
572 | ||
573 | static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val) | |
574 | { | |
575 | int ret; | |
576 | int is_active; | |
577 | ||
578 | mutex_lock(&data->lock); | |
579 | ||
580 | is_active = mma8452_is_active(data); | |
581 | if (is_active < 0) { | |
582 | ret = is_active; | |
583 | goto fail; | |
584 | } | |
585 | ||
586 | /* config can only be changed when in standby */ | |
587 | if (is_active > 0) { | |
588 | ret = mma8452_standby(data); | |
589 | if (ret < 0) | |
590 | goto fail; | |
591 | } | |
592 | ||
593 | ret = i2c_smbus_write_byte_data(data->client, reg, val); | |
594 | if (ret < 0) | |
595 | goto fail; | |
596 | ||
597 | if (is_active > 0) { | |
598 | ret = mma8452_active(data); | |
599 | if (ret < 0) | |
600 | goto fail; | |
601 | } | |
602 | ||
603 | ret = 0; | |
604 | fail: | |
605 | mutex_unlock(&data->lock); | |
606 | ||
607 | return ret; | |
608 | } | |
609 | ||
610 | static int mma8452_set_power_mode(struct mma8452_data *data, u8 mode) | |
611 | { | |
612 | int reg; | |
613 | ||
614 | reg = i2c_smbus_read_byte_data(data->client, | |
615 | MMA8452_CTRL_REG2); | |
616 | if (reg < 0) | |
617 | return reg; | |
618 | ||
619 | reg &= ~MMA8452_CTRL_REG2_MODS_MASK; | |
620 | reg |= mode << MMA8452_CTRL_REG2_MODS_SHIFT; | |
621 | ||
622 | return mma8452_change_config(data, MMA8452_CTRL_REG2, reg); | |
623 | } | |
624 | ||
625 | /* returns >0 if in freefall mode, 0 if not or <0 if an error occurred */ | |
626 | static int mma8452_freefall_mode_enabled(struct mma8452_data *data) | |
627 | { | |
628 | int val; | |
629 | ||
630 | val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG); | |
631 | if (val < 0) | |
632 | return val; | |
633 | ||
634 | return !(val & MMA8452_FF_MT_CFG_OAE); | |
635 | } | |
636 | ||
637 | static int mma8452_set_freefall_mode(struct mma8452_data *data, bool state) | |
638 | { | |
639 | int val; | |
640 | ||
641 | if ((state && mma8452_freefall_mode_enabled(data)) || | |
642 | (!state && !(mma8452_freefall_mode_enabled(data)))) | |
643 | return 0; | |
644 | ||
645 | val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG); | |
646 | if (val < 0) | |
647 | return val; | |
648 | ||
649 | if (state) { | |
650 | val |= BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT); | |
651 | val |= BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT); | |
652 | val |= BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT); | |
653 | val &= ~MMA8452_FF_MT_CFG_OAE; | |
654 | } else { | |
655 | val &= ~BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT); | |
656 | val &= ~BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT); | |
657 | val &= ~BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT); | |
658 | val |= MMA8452_FF_MT_CFG_OAE; | |
659 | } | |
660 | ||
661 | return mma8452_change_config(data, MMA8452_FF_MT_CFG, val); | |
662 | } | |
663 | ||
664 | static int mma8452_set_hp_filter_frequency(struct mma8452_data *data, | |
665 | int val, int val2) | |
666 | { | |
667 | int i, reg; | |
668 | ||
669 | i = mma8452_get_hp_filter_index(data, val, val2); | |
670 | if (i < 0) | |
671 | return i; | |
672 | ||
673 | reg = i2c_smbus_read_byte_data(data->client, | |
674 | MMA8452_HP_FILTER_CUTOFF); | |
675 | if (reg < 0) | |
676 | return reg; | |
677 | ||
678 | reg &= ~MMA8452_HP_FILTER_CUTOFF_SEL_MASK; | |
679 | reg |= i; | |
680 | ||
681 | return mma8452_change_config(data, MMA8452_HP_FILTER_CUTOFF, reg); | |
682 | } | |
683 | ||
684 | static int mma8452_write_raw(struct iio_dev *indio_dev, | |
685 | struct iio_chan_spec const *chan, | |
686 | int val, int val2, long mask) | |
687 | { | |
688 | struct mma8452_data *data = iio_priv(indio_dev); | |
689 | int i, ret; | |
690 | ||
691 | ret = iio_device_claim_direct_mode(indio_dev); | |
692 | if (ret) | |
693 | return ret; | |
694 | ||
695 | switch (mask) { | |
696 | case IIO_CHAN_INFO_SAMP_FREQ: | |
697 | i = mma8452_get_samp_freq_index(data, val, val2); | |
698 | if (i < 0) { | |
699 | ret = i; | |
700 | break; | |
701 | } | |
702 | data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK; | |
703 | data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT; | |
704 | ||
705 | ret = mma8452_change_config(data, MMA8452_CTRL_REG1, | |
706 | data->ctrl_reg1); | |
707 | break; | |
708 | case IIO_CHAN_INFO_SCALE: | |
709 | i = mma8452_get_scale_index(data, val, val2); | |
710 | if (i < 0) { | |
711 | ret = i; | |
712 | break; | |
713 | } | |
714 | ||
715 | data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK; | |
716 | data->data_cfg |= i; | |
717 | ||
718 | ret = mma8452_change_config(data, MMA8452_DATA_CFG, | |
719 | data->data_cfg); | |
720 | break; | |
721 | case IIO_CHAN_INFO_CALIBBIAS: | |
722 | if (val < -128 || val > 127) { | |
723 | ret = -EINVAL; | |
724 | break; | |
725 | } | |
726 | ||
727 | ret = mma8452_change_config(data, | |
728 | MMA8452_OFF_X + chan->scan_index, | |
729 | val); | |
730 | break; | |
731 | ||
732 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: | |
733 | if (val == 0 && val2 == 0) { | |
734 | data->data_cfg &= ~MMA8452_DATA_CFG_HPF_MASK; | |
735 | } else { | |
736 | data->data_cfg |= MMA8452_DATA_CFG_HPF_MASK; | |
737 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
738 | if (ret < 0) | |
739 | break; | |
740 | } | |
741 | ||
742 | ret = mma8452_change_config(data, MMA8452_DATA_CFG, | |
743 | data->data_cfg); | |
744 | break; | |
745 | ||
746 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: | |
747 | ret = mma8452_get_odr_index(data); | |
748 | ||
749 | for (i = 0; i < ARRAY_SIZE(mma8452_os_ratio); i++) { | |
750 | if (mma8452_os_ratio[i][ret] == val) { | |
751 | ret = mma8452_set_power_mode(data, i); | |
752 | break; | |
753 | } | |
754 | } | |
755 | break; | |
756 | default: | |
757 | ret = -EINVAL; | |
758 | break; | |
759 | } | |
760 | ||
761 | iio_device_release_direct_mode(indio_dev); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | static int mma8452_get_event_regs(struct mma8452_data *data, | |
766 | const struct iio_chan_spec *chan, enum iio_event_direction dir, | |
767 | const struct mma8452_event_regs **ev_reg) | |
768 | { | |
769 | if (!chan) | |
770 | return -EINVAL; | |
771 | ||
772 | switch (chan->type) { | |
773 | case IIO_ACCEL: | |
774 | switch (dir) { | |
775 | case IIO_EV_DIR_RISING: | |
776 | if ((data->chip_info->all_events | |
777 | & MMA8452_INT_TRANS) && | |
778 | (data->chip_info->enabled_events | |
779 | & MMA8452_INT_TRANS)) | |
780 | *ev_reg = &ev_regs_accel_rising; | |
781 | else | |
782 | *ev_reg = &ev_regs_accel_falling; | |
783 | return 0; | |
784 | case IIO_EV_DIR_FALLING: | |
785 | *ev_reg = &ev_regs_accel_falling; | |
786 | return 0; | |
787 | default: | |
788 | return -EINVAL; | |
789 | } | |
790 | default: | |
791 | return -EINVAL; | |
792 | } | |
793 | } | |
794 | ||
795 | static int mma8452_read_event_value(struct iio_dev *indio_dev, | |
796 | const struct iio_chan_spec *chan, | |
797 | enum iio_event_type type, | |
798 | enum iio_event_direction dir, | |
799 | enum iio_event_info info, | |
800 | int *val, int *val2) | |
801 | { | |
802 | struct mma8452_data *data = iio_priv(indio_dev); | |
803 | int ret, us, power_mode; | |
804 | const struct mma8452_event_regs *ev_regs; | |
805 | ||
806 | ret = mma8452_get_event_regs(data, chan, dir, &ev_regs); | |
807 | if (ret) | |
808 | return ret; | |
809 | ||
810 | switch (info) { | |
811 | case IIO_EV_INFO_VALUE: | |
812 | ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_ths); | |
813 | if (ret < 0) | |
814 | return ret; | |
815 | ||
816 | *val = ret & ev_regs->ev_ths_mask; | |
817 | ||
818 | return IIO_VAL_INT; | |
819 | ||
820 | case IIO_EV_INFO_PERIOD: | |
821 | ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_count); | |
822 | if (ret < 0) | |
823 | return ret; | |
824 | ||
825 | power_mode = mma8452_get_power_mode(data); | |
826 | if (power_mode < 0) | |
827 | return power_mode; | |
828 | ||
829 | us = ret * mma8452_transient_time_step_us[power_mode][ | |
830 | mma8452_get_odr_index(data)]; | |
831 | *val = us / USEC_PER_SEC; | |
832 | *val2 = us % USEC_PER_SEC; | |
833 | ||
834 | return IIO_VAL_INT_PLUS_MICRO; | |
835 | ||
836 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: | |
837 | ret = i2c_smbus_read_byte_data(data->client, | |
838 | MMA8452_TRANSIENT_CFG); | |
839 | if (ret < 0) | |
840 | return ret; | |
841 | ||
842 | if (ret & MMA8452_TRANSIENT_CFG_HPF_BYP) { | |
843 | *val = 0; | |
844 | *val2 = 0; | |
845 | } else { | |
846 | ret = mma8452_read_hp_filter(data, val, val2); | |
847 | if (ret < 0) | |
848 | return ret; | |
849 | } | |
850 | ||
851 | return IIO_VAL_INT_PLUS_MICRO; | |
852 | ||
853 | default: | |
854 | return -EINVAL; | |
855 | } | |
856 | } | |
857 | ||
858 | static int mma8452_write_event_value(struct iio_dev *indio_dev, | |
859 | const struct iio_chan_spec *chan, | |
860 | enum iio_event_type type, | |
861 | enum iio_event_direction dir, | |
862 | enum iio_event_info info, | |
863 | int val, int val2) | |
864 | { | |
865 | struct mma8452_data *data = iio_priv(indio_dev); | |
866 | int ret, reg, steps; | |
867 | const struct mma8452_event_regs *ev_regs; | |
868 | ||
869 | ret = mma8452_get_event_regs(data, chan, dir, &ev_regs); | |
870 | if (ret) | |
871 | return ret; | |
872 | ||
873 | switch (info) { | |
874 | case IIO_EV_INFO_VALUE: | |
875 | if (val < 0 || val > ev_regs->ev_ths_mask) | |
876 | return -EINVAL; | |
877 | ||
878 | return mma8452_change_config(data, ev_regs->ev_ths, val); | |
879 | ||
880 | case IIO_EV_INFO_PERIOD: | |
881 | ret = mma8452_get_power_mode(data); | |
882 | if (ret < 0) | |
883 | return ret; | |
884 | ||
885 | steps = (val * USEC_PER_SEC + val2) / | |
886 | mma8452_transient_time_step_us[ret][ | |
887 | mma8452_get_odr_index(data)]; | |
888 | ||
889 | if (steps < 0 || steps > 0xff) | |
890 | return -EINVAL; | |
891 | ||
892 | return mma8452_change_config(data, ev_regs->ev_count, steps); | |
893 | ||
894 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: | |
895 | reg = i2c_smbus_read_byte_data(data->client, | |
896 | MMA8452_TRANSIENT_CFG); | |
897 | if (reg < 0) | |
898 | return reg; | |
899 | ||
900 | if (val == 0 && val2 == 0) { | |
901 | reg |= MMA8452_TRANSIENT_CFG_HPF_BYP; | |
902 | } else { | |
903 | reg &= ~MMA8452_TRANSIENT_CFG_HPF_BYP; | |
904 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
905 | if (ret < 0) | |
906 | return ret; | |
907 | } | |
908 | ||
909 | return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, reg); | |
910 | ||
911 | default: | |
912 | return -EINVAL; | |
913 | } | |
914 | } | |
915 | ||
916 | static int mma8452_read_event_config(struct iio_dev *indio_dev, | |
917 | const struct iio_chan_spec *chan, | |
918 | enum iio_event_type type, | |
919 | enum iio_event_direction dir) | |
920 | { | |
921 | struct mma8452_data *data = iio_priv(indio_dev); | |
922 | int ret; | |
923 | const struct mma8452_event_regs *ev_regs; | |
924 | ||
925 | ret = mma8452_get_event_regs(data, chan, dir, &ev_regs); | |
926 | if (ret) | |
927 | return ret; | |
928 | ||
929 | switch (dir) { | |
930 | case IIO_EV_DIR_FALLING: | |
931 | return mma8452_freefall_mode_enabled(data); | |
932 | case IIO_EV_DIR_RISING: | |
933 | ret = i2c_smbus_read_byte_data(data->client, | |
934 | ev_regs->ev_cfg); | |
935 | if (ret < 0) | |
936 | return ret; | |
937 | ||
938 | return !!(ret & BIT(chan->scan_index + | |
939 | ev_regs->ev_cfg_chan_shift)); | |
940 | default: | |
941 | return -EINVAL; | |
942 | } | |
943 | } | |
944 | ||
945 | static int mma8452_write_event_config(struct iio_dev *indio_dev, | |
946 | const struct iio_chan_spec *chan, | |
947 | enum iio_event_type type, | |
948 | enum iio_event_direction dir, | |
949 | int state) | |
950 | { | |
951 | struct mma8452_data *data = iio_priv(indio_dev); | |
952 | int val, ret; | |
953 | const struct mma8452_event_regs *ev_regs; | |
954 | ||
955 | ret = mma8452_get_event_regs(data, chan, dir, &ev_regs); | |
956 | if (ret) | |
957 | return ret; | |
958 | ||
959 | ret = mma8452_set_runtime_pm_state(data->client, state); | |
960 | if (ret) | |
961 | return ret; | |
962 | ||
963 | switch (dir) { | |
964 | case IIO_EV_DIR_FALLING: | |
965 | return mma8452_set_freefall_mode(data, state); | |
966 | case IIO_EV_DIR_RISING: | |
967 | val = i2c_smbus_read_byte_data(data->client, ev_regs->ev_cfg); | |
968 | if (val < 0) | |
969 | return val; | |
970 | ||
971 | if (state) { | |
972 | if (mma8452_freefall_mode_enabled(data)) { | |
973 | val &= ~BIT(idx_x + ev_regs->ev_cfg_chan_shift); | |
974 | val &= ~BIT(idx_y + ev_regs->ev_cfg_chan_shift); | |
975 | val &= ~BIT(idx_z + ev_regs->ev_cfg_chan_shift); | |
976 | val |= MMA8452_FF_MT_CFG_OAE; | |
977 | } | |
978 | val |= BIT(chan->scan_index + | |
979 | ev_regs->ev_cfg_chan_shift); | |
980 | } else { | |
981 | if (mma8452_freefall_mode_enabled(data)) | |
982 | return 0; | |
983 | ||
984 | val &= ~BIT(chan->scan_index + | |
985 | ev_regs->ev_cfg_chan_shift); | |
986 | } | |
987 | ||
988 | val |= ev_regs->ev_cfg_ele; | |
989 | ||
990 | return mma8452_change_config(data, ev_regs->ev_cfg, val); | |
991 | default: | |
992 | return -EINVAL; | |
993 | } | |
994 | } | |
995 | ||
996 | static void mma8452_transient_interrupt(struct iio_dev *indio_dev) | |
997 | { | |
998 | struct mma8452_data *data = iio_priv(indio_dev); | |
999 | s64 ts = iio_get_time_ns(indio_dev); | |
1000 | int src; | |
1001 | ||
1002 | src = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_SRC); | |
1003 | if (src < 0) | |
1004 | return; | |
1005 | ||
1006 | if (src & MMA8452_TRANSIENT_SRC_XTRANSE) | |
1007 | iio_push_event(indio_dev, | |
1008 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, | |
1009 | IIO_EV_TYPE_MAG, | |
1010 | IIO_EV_DIR_RISING), | |
1011 | ts); | |
1012 | ||
1013 | if (src & MMA8452_TRANSIENT_SRC_YTRANSE) | |
1014 | iio_push_event(indio_dev, | |
1015 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y, | |
1016 | IIO_EV_TYPE_MAG, | |
1017 | IIO_EV_DIR_RISING), | |
1018 | ts); | |
1019 | ||
1020 | if (src & MMA8452_TRANSIENT_SRC_ZTRANSE) | |
1021 | iio_push_event(indio_dev, | |
1022 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z, | |
1023 | IIO_EV_TYPE_MAG, | |
1024 | IIO_EV_DIR_RISING), | |
1025 | ts); | |
1026 | } | |
1027 | ||
1028 | static irqreturn_t mma8452_interrupt(int irq, void *p) | |
1029 | { | |
1030 | struct iio_dev *indio_dev = p; | |
1031 | struct mma8452_data *data = iio_priv(indio_dev); | |
1032 | int ret = IRQ_NONE; | |
1033 | int src; | |
1034 | ||
1035 | src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC); | |
1036 | if (src < 0) | |
1037 | return IRQ_NONE; | |
1038 | ||
1039 | if (!(src & (data->chip_info->enabled_events | MMA8452_INT_DRDY))) | |
1040 | return IRQ_NONE; | |
1041 | ||
1042 | if (src & MMA8452_INT_DRDY) { | |
1043 | iio_trigger_poll_chained(indio_dev->trig); | |
1044 | ret = IRQ_HANDLED; | |
1045 | } | |
1046 | ||
1047 | if (src & MMA8452_INT_FF_MT) { | |
1048 | if (mma8452_freefall_mode_enabled(data)) { | |
1049 | s64 ts = iio_get_time_ns(indio_dev); | |
1050 | ||
1051 | iio_push_event(indio_dev, | |
1052 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, | |
1053 | IIO_MOD_X_AND_Y_AND_Z, | |
1054 | IIO_EV_TYPE_MAG, | |
1055 | IIO_EV_DIR_FALLING), | |
1056 | ts); | |
1057 | } | |
1058 | ret = IRQ_HANDLED; | |
1059 | } | |
1060 | ||
1061 | if (src & MMA8452_INT_TRANS) { | |
1062 | mma8452_transient_interrupt(indio_dev); | |
1063 | ret = IRQ_HANDLED; | |
1064 | } | |
1065 | ||
1066 | return ret; | |
1067 | } | |
1068 | ||
1069 | static irqreturn_t mma8452_trigger_handler(int irq, void *p) | |
1070 | { | |
1071 | struct iio_poll_func *pf = p; | |
1072 | struct iio_dev *indio_dev = pf->indio_dev; | |
1073 | struct mma8452_data *data = iio_priv(indio_dev); | |
1074 | u8 buffer[16]; /* 3 16-bit channels + padding + ts */ | |
1075 | int ret; | |
1076 | ||
1077 | ret = mma8452_read(data, (__be16 *)buffer); | |
1078 | if (ret < 0) | |
1079 | goto done; | |
1080 | ||
1081 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, | |
1082 | iio_get_time_ns(indio_dev)); | |
1083 | ||
1084 | done: | |
1085 | iio_trigger_notify_done(indio_dev->trig); | |
1086 | ||
1087 | return IRQ_HANDLED; | |
1088 | } | |
1089 | ||
1090 | static int mma8452_reg_access_dbg(struct iio_dev *indio_dev, | |
1091 | unsigned int reg, unsigned int writeval, | |
1092 | unsigned int *readval) | |
1093 | { | |
1094 | int ret; | |
1095 | struct mma8452_data *data = iio_priv(indio_dev); | |
1096 | ||
1097 | if (reg > MMA8452_MAX_REG) | |
1098 | return -EINVAL; | |
1099 | ||
1100 | if (!readval) | |
1101 | return mma8452_change_config(data, reg, writeval); | |
1102 | ||
1103 | ret = i2c_smbus_read_byte_data(data->client, reg); | |
1104 | if (ret < 0) | |
1105 | return ret; | |
1106 | ||
1107 | *readval = ret; | |
1108 | ||
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | static const struct iio_event_spec mma8452_freefall_event[] = { | |
1113 | { | |
1114 | .type = IIO_EV_TYPE_MAG, | |
1115 | .dir = IIO_EV_DIR_FALLING, | |
1116 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1117 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1118 | BIT(IIO_EV_INFO_PERIOD) | | |
1119 | BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB) | |
1120 | }, | |
1121 | }; | |
1122 | ||
1123 | static const struct iio_event_spec mma8652_freefall_event[] = { | |
1124 | { | |
1125 | .type = IIO_EV_TYPE_MAG, | |
1126 | .dir = IIO_EV_DIR_FALLING, | |
1127 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1128 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1129 | BIT(IIO_EV_INFO_PERIOD) | |
1130 | }, | |
1131 | }; | |
1132 | ||
1133 | static const struct iio_event_spec mma8452_transient_event[] = { | |
1134 | { | |
1135 | .type = IIO_EV_TYPE_MAG, | |
1136 | .dir = IIO_EV_DIR_RISING, | |
1137 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1138 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1139 | BIT(IIO_EV_INFO_PERIOD) | | |
1140 | BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB) | |
1141 | }, | |
1142 | }; | |
1143 | ||
1144 | static const struct iio_event_spec mma8452_motion_event[] = { | |
1145 | { | |
1146 | .type = IIO_EV_TYPE_MAG, | |
1147 | .dir = IIO_EV_DIR_RISING, | |
1148 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1149 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1150 | BIT(IIO_EV_INFO_PERIOD) | |
1151 | }, | |
1152 | }; | |
1153 | ||
1154 | /* | |
1155 | * Threshold is configured in fixed 8G/127 steps regardless of | |
1156 | * currently selected scale for measurement. | |
1157 | */ | |
1158 | static IIO_CONST_ATTR_NAMED(accel_transient_scale, in_accel_scale, "0.617742"); | |
1159 | ||
1160 | static struct attribute *mma8452_event_attributes[] = { | |
1161 | &iio_const_attr_accel_transient_scale.dev_attr.attr, | |
1162 | NULL, | |
1163 | }; | |
1164 | ||
1165 | static struct attribute_group mma8452_event_attribute_group = { | |
1166 | .attrs = mma8452_event_attributes, | |
1167 | }; | |
1168 | ||
1169 | #define MMA8452_FREEFALL_CHANNEL(modifier) { \ | |
1170 | .type = IIO_ACCEL, \ | |
1171 | .modified = 1, \ | |
1172 | .channel2 = modifier, \ | |
1173 | .scan_index = -1, \ | |
1174 | .event_spec = mma8452_freefall_event, \ | |
1175 | .num_event_specs = ARRAY_SIZE(mma8452_freefall_event), \ | |
1176 | } | |
1177 | ||
1178 | #define MMA8652_FREEFALL_CHANNEL(modifier) { \ | |
1179 | .type = IIO_ACCEL, \ | |
1180 | .modified = 1, \ | |
1181 | .channel2 = modifier, \ | |
1182 | .scan_index = -1, \ | |
1183 | .event_spec = mma8652_freefall_event, \ | |
1184 | .num_event_specs = ARRAY_SIZE(mma8652_freefall_event), \ | |
1185 | } | |
1186 | ||
1187 | #define MMA8452_CHANNEL(axis, idx, bits) { \ | |
1188 | .type = IIO_ACCEL, \ | |
1189 | .modified = 1, \ | |
1190 | .channel2 = IIO_MOD_##axis, \ | |
1191 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
1192 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ | |
1193 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ | |
1194 | BIT(IIO_CHAN_INFO_SCALE) | \ | |
1195 | BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY) | \ | |
1196 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ | |
1197 | .scan_index = idx, \ | |
1198 | .scan_type = { \ | |
1199 | .sign = 's', \ | |
1200 | .realbits = (bits), \ | |
1201 | .storagebits = 16, \ | |
1202 | .shift = 16 - (bits), \ | |
1203 | .endianness = IIO_BE, \ | |
1204 | }, \ | |
1205 | .event_spec = mma8452_transient_event, \ | |
1206 | .num_event_specs = ARRAY_SIZE(mma8452_transient_event), \ | |
1207 | } | |
1208 | ||
1209 | #define MMA8652_CHANNEL(axis, idx, bits) { \ | |
1210 | .type = IIO_ACCEL, \ | |
1211 | .modified = 1, \ | |
1212 | .channel2 = IIO_MOD_##axis, \ | |
1213 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
1214 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ | |
1215 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ | |
1216 | BIT(IIO_CHAN_INFO_SCALE) | \ | |
1217 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ | |
1218 | .scan_index = idx, \ | |
1219 | .scan_type = { \ | |
1220 | .sign = 's', \ | |
1221 | .realbits = (bits), \ | |
1222 | .storagebits = 16, \ | |
1223 | .shift = 16 - (bits), \ | |
1224 | .endianness = IIO_BE, \ | |
1225 | }, \ | |
1226 | .event_spec = mma8452_motion_event, \ | |
1227 | .num_event_specs = ARRAY_SIZE(mma8452_motion_event), \ | |
1228 | } | |
1229 | ||
1230 | static const struct iio_chan_spec mma8451_channels[] = { | |
1231 | MMA8452_CHANNEL(X, idx_x, 14), | |
1232 | MMA8452_CHANNEL(Y, idx_y, 14), | |
1233 | MMA8452_CHANNEL(Z, idx_z, 14), | |
1234 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1235 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1236 | }; | |
1237 | ||
1238 | static const struct iio_chan_spec mma8452_channels[] = { | |
1239 | MMA8452_CHANNEL(X, idx_x, 12), | |
1240 | MMA8452_CHANNEL(Y, idx_y, 12), | |
1241 | MMA8452_CHANNEL(Z, idx_z, 12), | |
1242 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1243 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1244 | }; | |
1245 | ||
1246 | static const struct iio_chan_spec mma8453_channels[] = { | |
1247 | MMA8452_CHANNEL(X, idx_x, 10), | |
1248 | MMA8452_CHANNEL(Y, idx_y, 10), | |
1249 | MMA8452_CHANNEL(Z, idx_z, 10), | |
1250 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1251 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1252 | }; | |
1253 | ||
1254 | static const struct iio_chan_spec mma8652_channels[] = { | |
1255 | MMA8652_CHANNEL(X, idx_x, 12), | |
1256 | MMA8652_CHANNEL(Y, idx_y, 12), | |
1257 | MMA8652_CHANNEL(Z, idx_z, 12), | |
1258 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1259 | MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1260 | }; | |
1261 | ||
1262 | static const struct iio_chan_spec mma8653_channels[] = { | |
1263 | MMA8652_CHANNEL(X, idx_x, 10), | |
1264 | MMA8652_CHANNEL(Y, idx_y, 10), | |
1265 | MMA8652_CHANNEL(Z, idx_z, 10), | |
1266 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1267 | MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1268 | }; | |
1269 | ||
1270 | enum { | |
1271 | mma8451, | |
1272 | mma8452, | |
1273 | mma8453, | |
1274 | mma8652, | |
1275 | mma8653, | |
1276 | fxls8471, | |
1277 | }; | |
1278 | ||
1279 | static const struct mma_chip_info mma_chip_info_table[] = { | |
1280 | [mma8451] = { | |
1281 | .chip_id = MMA8451_DEVICE_ID, | |
1282 | .channels = mma8451_channels, | |
1283 | .num_channels = ARRAY_SIZE(mma8451_channels), | |
1284 | /* | |
1285 | * Hardware has fullscale of -2G, -4G, -8G corresponding to | |
1286 | * raw value -8192 for 14 bit, -2048 for 12 bit or -512 for 10 | |
1287 | * bit. | |
1288 | * The userspace interface uses m/s^2 and we declare micro units | |
1289 | * So scale factor for 12 bit here is given by: | |
1290 | * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665 | |
1291 | */ | |
1292 | .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} }, | |
1293 | /* | |
1294 | * Although we enable the interrupt sources once and for | |
1295 | * all here the event detection itself is not enabled until | |
1296 | * userspace asks for it by mma8452_write_event_config() | |
1297 | */ | |
1298 | .all_events = MMA8452_INT_DRDY | | |
1299 | MMA8452_INT_TRANS | | |
1300 | MMA8452_INT_FF_MT, | |
1301 | .enabled_events = MMA8452_INT_TRANS | | |
1302 | MMA8452_INT_FF_MT, | |
1303 | }, | |
1304 | [mma8452] = { | |
1305 | .chip_id = MMA8452_DEVICE_ID, | |
1306 | .channels = mma8452_channels, | |
1307 | .num_channels = ARRAY_SIZE(mma8452_channels), | |
1308 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, | |
1309 | /* | |
1310 | * Although we enable the interrupt sources once and for | |
1311 | * all here the event detection itself is not enabled until | |
1312 | * userspace asks for it by mma8452_write_event_config() | |
1313 | */ | |
1314 | .all_events = MMA8452_INT_DRDY | | |
1315 | MMA8452_INT_TRANS | | |
1316 | MMA8452_INT_FF_MT, | |
1317 | .enabled_events = MMA8452_INT_TRANS | | |
1318 | MMA8452_INT_FF_MT, | |
1319 | }, | |
1320 | [mma8453] = { | |
1321 | .chip_id = MMA8453_DEVICE_ID, | |
1322 | .channels = mma8453_channels, | |
1323 | .num_channels = ARRAY_SIZE(mma8453_channels), | |
1324 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
1325 | /* | |
1326 | * Although we enable the interrupt sources once and for | |
1327 | * all here the event detection itself is not enabled until | |
1328 | * userspace asks for it by mma8452_write_event_config() | |
1329 | */ | |
1330 | .all_events = MMA8452_INT_DRDY | | |
1331 | MMA8452_INT_TRANS | | |
1332 | MMA8452_INT_FF_MT, | |
1333 | .enabled_events = MMA8452_INT_TRANS | | |
1334 | MMA8452_INT_FF_MT, | |
1335 | }, | |
1336 | [mma8652] = { | |
1337 | .chip_id = MMA8652_DEVICE_ID, | |
1338 | .channels = mma8652_channels, | |
1339 | .num_channels = ARRAY_SIZE(mma8652_channels), | |
1340 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, | |
1341 | .all_events = MMA8452_INT_DRDY | | |
1342 | MMA8452_INT_FF_MT, | |
1343 | .enabled_events = MMA8452_INT_FF_MT, | |
1344 | }, | |
1345 | [mma8653] = { | |
1346 | .chip_id = MMA8653_DEVICE_ID, | |
1347 | .channels = mma8653_channels, | |
1348 | .num_channels = ARRAY_SIZE(mma8653_channels), | |
1349 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
1350 | /* | |
1351 | * Although we enable the interrupt sources once and for | |
1352 | * all here the event detection itself is not enabled until | |
1353 | * userspace asks for it by mma8452_write_event_config() | |
1354 | */ | |
1355 | .all_events = MMA8452_INT_DRDY | | |
1356 | MMA8452_INT_FF_MT, | |
1357 | .enabled_events = MMA8452_INT_FF_MT, | |
1358 | }, | |
1359 | [fxls8471] = { | |
1360 | .chip_id = FXLS8471_DEVICE_ID, | |
1361 | .channels = mma8451_channels, | |
1362 | .num_channels = ARRAY_SIZE(mma8451_channels), | |
1363 | .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} }, | |
1364 | /* | |
1365 | * Although we enable the interrupt sources once and for | |
1366 | * all here the event detection itself is not enabled until | |
1367 | * userspace asks for it by mma8452_write_event_config() | |
1368 | */ | |
1369 | .all_events = MMA8452_INT_DRDY | | |
1370 | MMA8452_INT_TRANS | | |
1371 | MMA8452_INT_FF_MT, | |
1372 | .enabled_events = MMA8452_INT_TRANS | | |
1373 | MMA8452_INT_FF_MT, | |
1374 | }, | |
1375 | }; | |
1376 | ||
1377 | static struct attribute *mma8452_attributes[] = { | |
1378 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, | |
1379 | &iio_dev_attr_in_accel_scale_available.dev_attr.attr, | |
1380 | &iio_dev_attr_in_accel_filter_high_pass_3db_frequency_available.dev_attr.attr, | |
1381 | &iio_dev_attr_in_accel_oversampling_ratio_available.dev_attr.attr, | |
1382 | NULL | |
1383 | }; | |
1384 | ||
1385 | static const struct attribute_group mma8452_group = { | |
1386 | .attrs = mma8452_attributes, | |
1387 | }; | |
1388 | ||
1389 | static const struct iio_info mma8452_info = { | |
1390 | .attrs = &mma8452_group, | |
1391 | .read_raw = &mma8452_read_raw, | |
1392 | .write_raw = &mma8452_write_raw, | |
1393 | .event_attrs = &mma8452_event_attribute_group, | |
1394 | .read_event_value = &mma8452_read_event_value, | |
1395 | .write_event_value = &mma8452_write_event_value, | |
1396 | .read_event_config = &mma8452_read_event_config, | |
1397 | .write_event_config = &mma8452_write_event_config, | |
1398 | .debugfs_reg_access = &mma8452_reg_access_dbg, | |
1399 | }; | |
1400 | ||
1401 | static const unsigned long mma8452_scan_masks[] = {0x7, 0}; | |
1402 | ||
1403 | static int mma8452_data_rdy_trigger_set_state(struct iio_trigger *trig, | |
1404 | bool state) | |
1405 | { | |
1406 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
1407 | struct mma8452_data *data = iio_priv(indio_dev); | |
1408 | int reg, ret; | |
1409 | ||
1410 | ret = mma8452_set_runtime_pm_state(data->client, state); | |
1411 | if (ret) | |
1412 | return ret; | |
1413 | ||
1414 | reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG4); | |
1415 | if (reg < 0) | |
1416 | return reg; | |
1417 | ||
1418 | if (state) | |
1419 | reg |= MMA8452_INT_DRDY; | |
1420 | else | |
1421 | reg &= ~MMA8452_INT_DRDY; | |
1422 | ||
1423 | return mma8452_change_config(data, MMA8452_CTRL_REG4, reg); | |
1424 | } | |
1425 | ||
1426 | static const struct iio_trigger_ops mma8452_trigger_ops = { | |
1427 | .set_trigger_state = mma8452_data_rdy_trigger_set_state, | |
1428 | .validate_device = iio_trigger_validate_own_device, | |
1429 | }; | |
1430 | ||
1431 | static int mma8452_trigger_setup(struct iio_dev *indio_dev) | |
1432 | { | |
1433 | struct mma8452_data *data = iio_priv(indio_dev); | |
1434 | struct iio_trigger *trig; | |
1435 | int ret; | |
1436 | ||
1437 | trig = devm_iio_trigger_alloc(&data->client->dev, "%s-dev%d", | |
1438 | indio_dev->name, | |
1439 | indio_dev->id); | |
1440 | if (!trig) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | trig->dev.parent = &data->client->dev; | |
1444 | trig->ops = &mma8452_trigger_ops; | |
1445 | iio_trigger_set_drvdata(trig, indio_dev); | |
1446 | ||
1447 | ret = iio_trigger_register(trig); | |
1448 | if (ret) | |
1449 | return ret; | |
1450 | ||
1451 | indio_dev->trig = trig; | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | static void mma8452_trigger_cleanup(struct iio_dev *indio_dev) | |
1457 | { | |
1458 | if (indio_dev->trig) | |
1459 | iio_trigger_unregister(indio_dev->trig); | |
1460 | } | |
1461 | ||
1462 | static int mma8452_reset(struct i2c_client *client) | |
1463 | { | |
1464 | int i; | |
1465 | int ret; | |
1466 | ||
1467 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2, | |
1468 | MMA8452_CTRL_REG2_RST); | |
1469 | if (ret < 0) | |
1470 | return ret; | |
1471 | ||
1472 | for (i = 0; i < 10; i++) { | |
1473 | usleep_range(100, 200); | |
1474 | ret = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG2); | |
1475 | if (ret == -EIO) | |
1476 | continue; /* I2C comm reset */ | |
1477 | if (ret < 0) | |
1478 | return ret; | |
1479 | if (!(ret & MMA8452_CTRL_REG2_RST)) | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | return -ETIMEDOUT; | |
1484 | } | |
1485 | ||
1486 | static const struct of_device_id mma8452_dt_ids[] = { | |
1487 | { .compatible = "fsl,mma8451", .data = &mma_chip_info_table[mma8451] }, | |
1488 | { .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] }, | |
1489 | { .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] }, | |
1490 | { .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] }, | |
1491 | { .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] }, | |
1492 | { .compatible = "fsl,fxls8471", .data = &mma_chip_info_table[fxls8471] }, | |
1493 | { } | |
1494 | }; | |
1495 | MODULE_DEVICE_TABLE(of, mma8452_dt_ids); | |
1496 | ||
1497 | static int mma8452_probe(struct i2c_client *client, | |
1498 | const struct i2c_device_id *id) | |
1499 | { | |
1500 | struct mma8452_data *data; | |
1501 | struct iio_dev *indio_dev; | |
1502 | int ret; | |
1503 | const struct of_device_id *match; | |
1504 | ||
1505 | match = of_match_device(mma8452_dt_ids, &client->dev); | |
1506 | if (!match) { | |
1507 | dev_err(&client->dev, "unknown device model\n"); | |
1508 | return -ENODEV; | |
1509 | } | |
1510 | ||
1511 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
1512 | if (!indio_dev) | |
1513 | return -ENOMEM; | |
1514 | ||
1515 | data = iio_priv(indio_dev); | |
1516 | data->client = client; | |
1517 | mutex_init(&data->lock); | |
1518 | data->chip_info = match->data; | |
1519 | ||
1520 | ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); | |
1521 | if (ret < 0) | |
1522 | return ret; | |
1523 | ||
1524 | switch (ret) { | |
1525 | case MMA8451_DEVICE_ID: | |
1526 | case MMA8452_DEVICE_ID: | |
1527 | case MMA8453_DEVICE_ID: | |
1528 | case MMA8652_DEVICE_ID: | |
1529 | case MMA8653_DEVICE_ID: | |
1530 | case FXLS8471_DEVICE_ID: | |
1531 | if (ret == data->chip_info->chip_id) | |
1532 | break; | |
1533 | default: | |
1534 | return -ENODEV; | |
1535 | } | |
1536 | ||
1537 | dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", | |
1538 | match->compatible, data->chip_info->chip_id); | |
1539 | ||
1540 | i2c_set_clientdata(client, indio_dev); | |
1541 | indio_dev->info = &mma8452_info; | |
1542 | indio_dev->name = id->name; | |
1543 | indio_dev->dev.parent = &client->dev; | |
1544 | indio_dev->modes = INDIO_DIRECT_MODE; | |
1545 | indio_dev->channels = data->chip_info->channels; | |
1546 | indio_dev->num_channels = data->chip_info->num_channels; | |
1547 | indio_dev->available_scan_masks = mma8452_scan_masks; | |
1548 | ||
1549 | ret = mma8452_reset(client); | |
1550 | if (ret < 0) | |
1551 | return ret; | |
1552 | ||
1553 | data->data_cfg = MMA8452_DATA_CFG_FS_2G; | |
1554 | ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, | |
1555 | data->data_cfg); | |
1556 | if (ret < 0) | |
1557 | return ret; | |
1558 | ||
1559 | /* | |
1560 | * By default set transient threshold to max to avoid events if | |
1561 | * enabling without configuring threshold. | |
1562 | */ | |
1563 | ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS, | |
1564 | MMA8452_TRANSIENT_THS_MASK); | |
1565 | if (ret < 0) | |
1566 | return ret; | |
1567 | ||
1568 | if (client->irq) { | |
1569 | int irq2; | |
1570 | ||
1571 | irq2 = of_irq_get_byname(client->dev.of_node, "INT2"); | |
1572 | ||
1573 | if (irq2 == client->irq) { | |
1574 | dev_dbg(&client->dev, "using interrupt line INT2\n"); | |
1575 | } else { | |
1576 | ret = i2c_smbus_write_byte_data(client, | |
1577 | MMA8452_CTRL_REG5, | |
1578 | data->chip_info->all_events); | |
1579 | if (ret < 0) | |
1580 | return ret; | |
1581 | ||
1582 | dev_dbg(&client->dev, "using interrupt line INT1\n"); | |
1583 | } | |
1584 | ||
1585 | ret = i2c_smbus_write_byte_data(client, | |
1586 | MMA8452_CTRL_REG4, | |
1587 | data->chip_info->enabled_events); | |
1588 | if (ret < 0) | |
1589 | return ret; | |
1590 | ||
1591 | ret = mma8452_trigger_setup(indio_dev); | |
1592 | if (ret < 0) | |
1593 | return ret; | |
1594 | } | |
1595 | ||
1596 | data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | | |
1597 | (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT); | |
1598 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, | |
1599 | data->ctrl_reg1); | |
1600 | if (ret < 0) | |
1601 | goto trigger_cleanup; | |
1602 | ||
1603 | ret = iio_triggered_buffer_setup(indio_dev, NULL, | |
1604 | mma8452_trigger_handler, NULL); | |
1605 | if (ret < 0) | |
1606 | goto trigger_cleanup; | |
1607 | ||
1608 | if (client->irq) { | |
1609 | ret = devm_request_threaded_irq(&client->dev, | |
1610 | client->irq, | |
1611 | NULL, mma8452_interrupt, | |
1612 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1613 | client->name, indio_dev); | |
1614 | if (ret) | |
1615 | goto buffer_cleanup; | |
1616 | } | |
1617 | ||
1618 | ret = pm_runtime_set_active(&client->dev); | |
1619 | if (ret < 0) | |
1620 | goto buffer_cleanup; | |
1621 | ||
1622 | pm_runtime_enable(&client->dev); | |
1623 | pm_runtime_set_autosuspend_delay(&client->dev, | |
1624 | MMA8452_AUTO_SUSPEND_DELAY_MS); | |
1625 | pm_runtime_use_autosuspend(&client->dev); | |
1626 | ||
1627 | ret = iio_device_register(indio_dev); | |
1628 | if (ret < 0) | |
1629 | goto buffer_cleanup; | |
1630 | ||
1631 | ret = mma8452_set_freefall_mode(data, false); | |
1632 | if (ret < 0) | |
1633 | goto buffer_cleanup; | |
1634 | ||
1635 | return 0; | |
1636 | ||
1637 | buffer_cleanup: | |
1638 | iio_triggered_buffer_cleanup(indio_dev); | |
1639 | ||
1640 | trigger_cleanup: | |
1641 | mma8452_trigger_cleanup(indio_dev); | |
1642 | ||
1643 | return ret; | |
1644 | } | |
1645 | ||
1646 | static int mma8452_remove(struct i2c_client *client) | |
1647 | { | |
1648 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
1649 | ||
1650 | iio_device_unregister(indio_dev); | |
1651 | ||
1652 | pm_runtime_disable(&client->dev); | |
1653 | pm_runtime_set_suspended(&client->dev); | |
1654 | pm_runtime_put_noidle(&client->dev); | |
1655 | ||
1656 | iio_triggered_buffer_cleanup(indio_dev); | |
1657 | mma8452_trigger_cleanup(indio_dev); | |
1658 | mma8452_standby(iio_priv(indio_dev)); | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | #ifdef CONFIG_PM | |
1664 | static int mma8452_runtime_suspend(struct device *dev) | |
1665 | { | |
1666 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1667 | struct mma8452_data *data = iio_priv(indio_dev); | |
1668 | int ret; | |
1669 | ||
1670 | mutex_lock(&data->lock); | |
1671 | ret = mma8452_standby(data); | |
1672 | mutex_unlock(&data->lock); | |
1673 | if (ret < 0) { | |
1674 | dev_err(&data->client->dev, "powering off device failed\n"); | |
1675 | return -EAGAIN; | |
1676 | } | |
1677 | ||
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int mma8452_runtime_resume(struct device *dev) | |
1682 | { | |
1683 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1684 | struct mma8452_data *data = iio_priv(indio_dev); | |
1685 | int ret, sleep_val; | |
1686 | ||
1687 | ret = mma8452_active(data); | |
1688 | if (ret < 0) | |
1689 | return ret; | |
1690 | ||
1691 | ret = mma8452_get_odr_index(data); | |
1692 | sleep_val = 1000 / mma8452_samp_freq[ret][0]; | |
1693 | if (sleep_val < 20) | |
1694 | usleep_range(sleep_val * 1000, 20000); | |
1695 | else | |
1696 | msleep_interruptible(sleep_val); | |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | #endif | |
1701 | ||
1702 | #ifdef CONFIG_PM_SLEEP | |
1703 | static int mma8452_suspend(struct device *dev) | |
1704 | { | |
1705 | return mma8452_standby(iio_priv(i2c_get_clientdata( | |
1706 | to_i2c_client(dev)))); | |
1707 | } | |
1708 | ||
1709 | static int mma8452_resume(struct device *dev) | |
1710 | { | |
1711 | return mma8452_active(iio_priv(i2c_get_clientdata( | |
1712 | to_i2c_client(dev)))); | |
1713 | } | |
1714 | #endif | |
1715 | ||
1716 | static const struct dev_pm_ops mma8452_pm_ops = { | |
1717 | SET_SYSTEM_SLEEP_PM_OPS(mma8452_suspend, mma8452_resume) | |
1718 | SET_RUNTIME_PM_OPS(mma8452_runtime_suspend, | |
1719 | mma8452_runtime_resume, NULL) | |
1720 | }; | |
1721 | ||
1722 | static const struct i2c_device_id mma8452_id[] = { | |
1723 | { "mma8451", mma8451 }, | |
1724 | { "mma8452", mma8452 }, | |
1725 | { "mma8453", mma8453 }, | |
1726 | { "mma8652", mma8652 }, | |
1727 | { "mma8653", mma8653 }, | |
1728 | { "fxls8471", fxls8471 }, | |
1729 | { } | |
1730 | }; | |
1731 | MODULE_DEVICE_TABLE(i2c, mma8452_id); | |
1732 | ||
1733 | static struct i2c_driver mma8452_driver = { | |
1734 | .driver = { | |
1735 | .name = "mma8452", | |
1736 | .of_match_table = of_match_ptr(mma8452_dt_ids), | |
1737 | .pm = &mma8452_pm_ops, | |
1738 | }, | |
1739 | .probe = mma8452_probe, | |
1740 | .remove = mma8452_remove, | |
1741 | .id_table = mma8452_id, | |
1742 | }; | |
1743 | module_i2c_driver(mma8452_driver); | |
1744 | ||
1745 | MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>"); | |
1746 | MODULE_DESCRIPTION("Freescale / NXP MMA8452 accelerometer driver"); | |
1747 | MODULE_LICENSE("GPL"); |