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Commit | Line | Data |
---|---|---|
c7eeea93 | 1 | /* |
c5ea1b58 MK |
2 | * mma8452.c - Support for following Freescale 3-axis accelerometers: |
3 | * | |
4 | * MMA8452Q (12 bit) | |
5 | * MMA8453Q (10 bit) | |
417e008b MK |
6 | * MMA8652FC (12 bit) |
7 | * MMA8653FC (10 bit) | |
c7eeea93 | 8 | * |
d6223c37 | 9 | * Copyright 2015 Martin Kepplinger <martin.kepplinger@theobroma-systems.com> |
c7eeea93 PM |
10 | * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net> |
11 | * | |
12 | * This file is subject to the terms and conditions of version 2 of | |
13 | * the GNU General Public License. See the file COPYING in the main | |
14 | * directory of this archive for more details. | |
15 | * | |
16 | * 7-bit I2C slave address 0x1c/0x1d (pin selectable) | |
17 | * | |
28e34278 | 18 | * TODO: orientation / freefall events, autosleep |
c7eeea93 PM |
19 | */ |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/i2c.h> | |
23 | #include <linux/iio/iio.h> | |
24 | #include <linux/iio/sysfs.h> | |
c7eeea93 | 25 | #include <linux/iio/buffer.h> |
ae6d9ce0 MF |
26 | #include <linux/iio/trigger.h> |
27 | #include <linux/iio/trigger_consumer.h> | |
c7eeea93 | 28 | #include <linux/iio/triggered_buffer.h> |
28e34278 | 29 | #include <linux/iio/events.h> |
c7eeea93 | 30 | #include <linux/delay.h> |
c3cdd6e4 | 31 | #include <linux/of_device.h> |
c7eeea93 | 32 | |
69abff81 HK |
33 | #define MMA8452_STATUS 0x00 |
34 | #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) | |
c5ea1b58 | 35 | #define MMA8452_OUT_X 0x01 /* MSB first */ |
69abff81 HK |
36 | #define MMA8452_OUT_Y 0x03 |
37 | #define MMA8452_OUT_Z 0x05 | |
38 | #define MMA8452_INT_SRC 0x0c | |
39 | #define MMA8452_WHO_AM_I 0x0d | |
40 | #define MMA8452_DATA_CFG 0x0e | |
41 | #define MMA8452_DATA_CFG_FS_MASK GENMASK(1, 0) | |
42 | #define MMA8452_DATA_CFG_FS_2G 0 | |
43 | #define MMA8452_DATA_CFG_FS_4G 1 | |
44 | #define MMA8452_DATA_CFG_FS_8G 2 | |
45 | #define MMA8452_DATA_CFG_HPF_MASK BIT(4) | |
46 | #define MMA8452_HP_FILTER_CUTOFF 0x0f | |
47 | #define MMA8452_HP_FILTER_CUTOFF_SEL_MASK GENMASK(1, 0) | |
60f562e7 MK |
48 | #define MMA8452_FF_MT_CFG 0x15 |
49 | #define MMA8452_FF_MT_CFG_OAE BIT(6) | |
50 | #define MMA8452_FF_MT_CFG_ELE BIT(7) | |
51 | #define MMA8452_FF_MT_SRC 0x16 | |
52 | #define MMA8452_FF_MT_SRC_XHE BIT(1) | |
53 | #define MMA8452_FF_MT_SRC_YHE BIT(3) | |
54 | #define MMA8452_FF_MT_SRC_ZHE BIT(5) | |
55 | #define MMA8452_FF_MT_THS 0x17 | |
56 | #define MMA8452_FF_MT_THS_MASK 0x7f | |
57 | #define MMA8452_FF_MT_COUNT 0x18 | |
69abff81 HK |
58 | #define MMA8452_TRANSIENT_CFG 0x1d |
59 | #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) | |
60 | #define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1) | |
61 | #define MMA8452_TRANSIENT_CFG_ELE BIT(4) | |
62 | #define MMA8452_TRANSIENT_SRC 0x1e | |
63 | #define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1) | |
64 | #define MMA8452_TRANSIENT_SRC_YTRANSE BIT(3) | |
65 | #define MMA8452_TRANSIENT_SRC_ZTRANSE BIT(5) | |
66 | #define MMA8452_TRANSIENT_THS 0x1f | |
67 | #define MMA8452_TRANSIENT_THS_MASK GENMASK(6, 0) | |
68 | #define MMA8452_TRANSIENT_COUNT 0x20 | |
69 | #define MMA8452_CTRL_REG1 0x2a | |
70 | #define MMA8452_CTRL_ACTIVE BIT(0) | |
71 | #define MMA8452_CTRL_DR_MASK GENMASK(5, 3) | |
72 | #define MMA8452_CTRL_DR_SHIFT 3 | |
73 | #define MMA8452_CTRL_DR_DEFAULT 0x4 /* 50 Hz sample frequency */ | |
74 | #define MMA8452_CTRL_REG2 0x2b | |
75 | #define MMA8452_CTRL_REG2_RST BIT(6) | |
76 | #define MMA8452_CTRL_REG4 0x2d | |
77 | #define MMA8452_CTRL_REG5 0x2e | |
78 | #define MMA8452_OFF_X 0x2f | |
79 | #define MMA8452_OFF_Y 0x30 | |
80 | #define MMA8452_OFF_Z 0x31 | |
c7eeea93 | 81 | |
69abff81 | 82 | #define MMA8452_MAX_REG 0x31 |
2a17698c | 83 | |
69abff81 | 84 | #define MMA8452_INT_DRDY BIT(0) |
60f562e7 | 85 | #define MMA8452_INT_FF_MT BIT(2) |
69abff81 | 86 | #define MMA8452_INT_TRANS BIT(5) |
c7eeea93 | 87 | |
69abff81 | 88 | #define MMA8452_DEVICE_ID 0x2a |
c5ea1b58 | 89 | #define MMA8453_DEVICE_ID 0x3a |
417e008b MK |
90 | #define MMA8652_DEVICE_ID 0x4a |
91 | #define MMA8653_DEVICE_ID 0x5a | |
c7eeea93 PM |
92 | |
93 | struct mma8452_data { | |
94 | struct i2c_client *client; | |
95 | struct mutex lock; | |
96 | u8 ctrl_reg1; | |
97 | u8 data_cfg; | |
c3cdd6e4 MK |
98 | const struct mma_chip_info *chip_info; |
99 | }; | |
100 | ||
101 | /** | |
102 | * struct mma_chip_info - chip specific data for Freescale's accelerometers | |
103 | * @chip_id: WHO_AM_I register's value | |
104 | * @channels: struct iio_chan_spec matching the device's | |
105 | * capabilities | |
106 | * @num_channels: number of channels | |
107 | * @mma_scales: scale factors for converting register values | |
108 | * to m/s^2; 3 modes: 2g, 4g, 8g; 2 integers | |
109 | * per mode: m/s^2 and micro m/s^2 | |
110 | * @ev_cfg: event config register address | |
111 | * @ev_cfg_ele: latch bit in event config register | |
112 | * @ev_cfg_chan_shift: number of the bit to enable events in X | |
113 | * direction; in event config register | |
114 | * @ev_src: event source register address | |
115 | * @ev_src_xe: bit in event source register that indicates | |
116 | * an event in X direction | |
117 | * @ev_src_ye: bit in event source register that indicates | |
118 | * an event in Y direction | |
119 | * @ev_src_ze: bit in event source register that indicates | |
120 | * an event in Z direction | |
121 | * @ev_ths: event threshold register address | |
122 | * @ev_ths_mask: mask for the threshold value | |
123 | * @ev_count: event count (period) register address | |
124 | * | |
125 | * Since not all chips supported by the driver support comparing high pass | |
126 | * filtered data for events (interrupts), different interrupt sources are | |
127 | * used for different chips and the relevant registers are included here. | |
128 | */ | |
129 | struct mma_chip_info { | |
130 | u8 chip_id; | |
131 | const struct iio_chan_spec *channels; | |
132 | int num_channels; | |
133 | const int mma_scales[3][2]; | |
134 | u8 ev_cfg; | |
135 | u8 ev_cfg_ele; | |
136 | u8 ev_cfg_chan_shift; | |
137 | u8 ev_src; | |
138 | u8 ev_src_xe; | |
139 | u8 ev_src_ye; | |
140 | u8 ev_src_ze; | |
141 | u8 ev_ths; | |
142 | u8 ev_ths_mask; | |
143 | u8 ev_count; | |
c7eeea93 PM |
144 | }; |
145 | ||
146 | static int mma8452_drdy(struct mma8452_data *data) | |
147 | { | |
148 | int tries = 150; | |
149 | ||
150 | while (tries-- > 0) { | |
151 | int ret = i2c_smbus_read_byte_data(data->client, | |
152 | MMA8452_STATUS); | |
153 | if (ret < 0) | |
154 | return ret; | |
155 | if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY) | |
156 | return 0; | |
686027fb | 157 | |
c7eeea93 PM |
158 | msleep(20); |
159 | } | |
160 | ||
161 | dev_err(&data->client->dev, "data not ready\n"); | |
686027fb | 162 | |
c7eeea93 PM |
163 | return -EIO; |
164 | } | |
165 | ||
166 | static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) | |
167 | { | |
168 | int ret = mma8452_drdy(data); | |
686027fb | 169 | |
c7eeea93 PM |
170 | if (ret < 0) |
171 | return ret; | |
686027fb HK |
172 | |
173 | return i2c_smbus_read_i2c_block_data(data->client, MMA8452_OUT_X, | |
174 | 3 * sizeof(__be16), (u8 *)buf); | |
c7eeea93 PM |
175 | } |
176 | ||
686027fb HK |
177 | static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2], |
178 | int n) | |
c7eeea93 PM |
179 | { |
180 | size_t len = 0; | |
181 | ||
182 | while (n-- > 0) | |
686027fb HK |
183 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", |
184 | vals[n][0], vals[n][1]); | |
c7eeea93 PM |
185 | |
186 | /* replace trailing space by newline */ | |
187 | buf[len - 1] = '\n'; | |
188 | ||
189 | return len; | |
190 | } | |
191 | ||
192 | static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n, | |
686027fb | 193 | int val, int val2) |
c7eeea93 PM |
194 | { |
195 | while (n-- > 0) | |
196 | if (val == vals[n][0] && val2 == vals[n][1]) | |
197 | return n; | |
198 | ||
199 | return -EINVAL; | |
200 | } | |
201 | ||
5dbbd19f MF |
202 | static int mma8452_get_odr_index(struct mma8452_data *data) |
203 | { | |
204 | return (data->ctrl_reg1 & MMA8452_CTRL_DR_MASK) >> | |
205 | MMA8452_CTRL_DR_SHIFT; | |
206 | } | |
207 | ||
c7eeea93 PM |
208 | static const int mma8452_samp_freq[8][2] = { |
209 | {800, 0}, {400, 0}, {200, 0}, {100, 0}, {50, 0}, {12, 500000}, | |
210 | {6, 250000}, {1, 560000} | |
211 | }; | |
212 | ||
5dbbd19f MF |
213 | /* Datasheet table 35 (step time vs sample frequency) */ |
214 | static const int mma8452_transient_time_step_us[8] = { | |
215 | 1250, | |
216 | 2500, | |
217 | 5000, | |
218 | 10000, | |
219 | 20000, | |
220 | 20000, | |
221 | 20000, | |
222 | 20000 | |
223 | }; | |
224 | ||
1e79841a MF |
225 | /* Datasheet table 18 (normal mode) */ |
226 | static const int mma8452_hp_filter_cutoff[8][4][2] = { | |
227 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 800 Hz sample */ | |
228 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 400 Hz sample */ | |
229 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, /* 200 Hz sample */ | |
230 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, /* 100 Hz sample */ | |
231 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 50 Hz sample */ | |
232 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 12.5 Hz sample */ | |
233 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 6.25 Hz sample */ | |
234 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} } /* 1.56 Hz sample */ | |
235 | }; | |
236 | ||
c7eeea93 | 237 | static ssize_t mma8452_show_samp_freq_avail(struct device *dev, |
686027fb HK |
238 | struct device_attribute *attr, |
239 | char *buf) | |
c7eeea93 PM |
240 | { |
241 | return mma8452_show_int_plus_micros(buf, mma8452_samp_freq, | |
686027fb | 242 | ARRAY_SIZE(mma8452_samp_freq)); |
c7eeea93 PM |
243 | } |
244 | ||
245 | static ssize_t mma8452_show_scale_avail(struct device *dev, | |
686027fb HK |
246 | struct device_attribute *attr, |
247 | char *buf) | |
c7eeea93 | 248 | { |
c3cdd6e4 MK |
249 | struct mma8452_data *data = iio_priv(i2c_get_clientdata( |
250 | to_i2c_client(dev))); | |
251 | ||
252 | return mma8452_show_int_plus_micros(buf, data->chip_info->mma_scales, | |
253 | ARRAY_SIZE(data->chip_info->mma_scales)); | |
c7eeea93 PM |
254 | } |
255 | ||
1e79841a MF |
256 | static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev, |
257 | struct device_attribute *attr, | |
258 | char *buf) | |
259 | { | |
260 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
261 | struct mma8452_data *data = iio_priv(indio_dev); | |
262 | int i = mma8452_get_odr_index(data); | |
263 | ||
264 | return mma8452_show_int_plus_micros(buf, mma8452_hp_filter_cutoff[i], | |
265 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0])); | |
266 | } | |
267 | ||
c7eeea93 PM |
268 | static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail); |
269 | static IIO_DEVICE_ATTR(in_accel_scale_available, S_IRUGO, | |
686027fb | 270 | mma8452_show_scale_avail, NULL, 0); |
1e79841a | 271 | static IIO_DEVICE_ATTR(in_accel_filter_high_pass_3db_frequency_available, |
686027fb | 272 | S_IRUGO, mma8452_show_hp_cutoff_avail, NULL, 0); |
c7eeea93 PM |
273 | |
274 | static int mma8452_get_samp_freq_index(struct mma8452_data *data, | |
686027fb | 275 | int val, int val2) |
c7eeea93 PM |
276 | { |
277 | return mma8452_get_int_plus_micros_index(mma8452_samp_freq, | |
686027fb HK |
278 | ARRAY_SIZE(mma8452_samp_freq), |
279 | val, val2); | |
c7eeea93 PM |
280 | } |
281 | ||
686027fb | 282 | static int mma8452_get_scale_index(struct mma8452_data *data, int val, int val2) |
c7eeea93 | 283 | { |
c3cdd6e4 MK |
284 | return mma8452_get_int_plus_micros_index(data->chip_info->mma_scales, |
285 | ARRAY_SIZE(data->chip_info->mma_scales), val, val2); | |
c7eeea93 PM |
286 | } |
287 | ||
1e79841a MF |
288 | static int mma8452_get_hp_filter_index(struct mma8452_data *data, |
289 | int val, int val2) | |
290 | { | |
291 | int i = mma8452_get_odr_index(data); | |
292 | ||
293 | return mma8452_get_int_plus_micros_index(mma8452_hp_filter_cutoff[i], | |
001fceb9 | 294 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0]), val, val2); |
1e79841a MF |
295 | } |
296 | ||
297 | static int mma8452_read_hp_filter(struct mma8452_data *data, int *hz, int *uHz) | |
298 | { | |
299 | int i, ret; | |
300 | ||
301 | ret = i2c_smbus_read_byte_data(data->client, MMA8452_HP_FILTER_CUTOFF); | |
302 | if (ret < 0) | |
303 | return ret; | |
304 | ||
305 | i = mma8452_get_odr_index(data); | |
306 | ret &= MMA8452_HP_FILTER_CUTOFF_SEL_MASK; | |
307 | *hz = mma8452_hp_filter_cutoff[i][ret][0]; | |
308 | *uHz = mma8452_hp_filter_cutoff[i][ret][1]; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
c7eeea93 PM |
313 | static int mma8452_read_raw(struct iio_dev *indio_dev, |
314 | struct iio_chan_spec const *chan, | |
315 | int *val, int *val2, long mask) | |
316 | { | |
317 | struct mma8452_data *data = iio_priv(indio_dev); | |
318 | __be16 buffer[3]; | |
319 | int i, ret; | |
320 | ||
321 | switch (mask) { | |
322 | case IIO_CHAN_INFO_RAW: | |
323 | if (iio_buffer_enabled(indio_dev)) | |
324 | return -EBUSY; | |
325 | ||
326 | mutex_lock(&data->lock); | |
327 | ret = mma8452_read(data, buffer); | |
328 | mutex_unlock(&data->lock); | |
329 | if (ret < 0) | |
330 | return ret; | |
686027fb | 331 | |
c3cdd6e4 MK |
332 | *val = sign_extend32(be16_to_cpu( |
333 | buffer[chan->scan_index]) >> chan->scan_type.shift, | |
334 | chan->scan_type.realbits - 1); | |
686027fb | 335 | |
c7eeea93 PM |
336 | return IIO_VAL_INT; |
337 | case IIO_CHAN_INFO_SCALE: | |
338 | i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK; | |
c3cdd6e4 MK |
339 | *val = data->chip_info->mma_scales[i][0]; |
340 | *val2 = data->chip_info->mma_scales[i][1]; | |
686027fb | 341 | |
c7eeea93 PM |
342 | return IIO_VAL_INT_PLUS_MICRO; |
343 | case IIO_CHAN_INFO_SAMP_FREQ: | |
5dbbd19f | 344 | i = mma8452_get_odr_index(data); |
c7eeea93 PM |
345 | *val = mma8452_samp_freq[i][0]; |
346 | *val2 = mma8452_samp_freq[i][1]; | |
686027fb | 347 | |
c7eeea93 PM |
348 | return IIO_VAL_INT_PLUS_MICRO; |
349 | case IIO_CHAN_INFO_CALIBBIAS: | |
686027fb HK |
350 | ret = i2c_smbus_read_byte_data(data->client, |
351 | MMA8452_OFF_X + chan->scan_index); | |
c7eeea93 PM |
352 | if (ret < 0) |
353 | return ret; | |
686027fb | 354 | |
c7eeea93 | 355 | *val = sign_extend32(ret, 7); |
686027fb | 356 | |
c7eeea93 | 357 | return IIO_VAL_INT; |
1e79841a MF |
358 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: |
359 | if (data->data_cfg & MMA8452_DATA_CFG_HPF_MASK) { | |
360 | ret = mma8452_read_hp_filter(data, val, val2); | |
361 | if (ret < 0) | |
362 | return ret; | |
363 | } else { | |
364 | *val = 0; | |
365 | *val2 = 0; | |
366 | } | |
686027fb | 367 | |
1e79841a | 368 | return IIO_VAL_INT_PLUS_MICRO; |
c7eeea93 | 369 | } |
686027fb | 370 | |
c7eeea93 PM |
371 | return -EINVAL; |
372 | } | |
373 | ||
374 | static int mma8452_standby(struct mma8452_data *data) | |
375 | { | |
376 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
686027fb | 377 | data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE); |
c7eeea93 PM |
378 | } |
379 | ||
380 | static int mma8452_active(struct mma8452_data *data) | |
381 | { | |
382 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
686027fb | 383 | data->ctrl_reg1); |
c7eeea93 PM |
384 | } |
385 | ||
386 | static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val) | |
387 | { | |
388 | int ret; | |
389 | ||
390 | mutex_lock(&data->lock); | |
391 | ||
392 | /* config can only be changed when in standby */ | |
393 | ret = mma8452_standby(data); | |
394 | if (ret < 0) | |
395 | goto fail; | |
396 | ||
397 | ret = i2c_smbus_write_byte_data(data->client, reg, val); | |
398 | if (ret < 0) | |
399 | goto fail; | |
400 | ||
401 | ret = mma8452_active(data); | |
402 | if (ret < 0) | |
403 | goto fail; | |
404 | ||
405 | ret = 0; | |
406 | fail: | |
407 | mutex_unlock(&data->lock); | |
686027fb | 408 | |
c7eeea93 PM |
409 | return ret; |
410 | } | |
411 | ||
1e79841a MF |
412 | static int mma8452_set_hp_filter_frequency(struct mma8452_data *data, |
413 | int val, int val2) | |
414 | { | |
415 | int i, reg; | |
416 | ||
417 | i = mma8452_get_hp_filter_index(data, val, val2); | |
418 | if (i < 0) | |
b9fddcdb | 419 | return i; |
1e79841a MF |
420 | |
421 | reg = i2c_smbus_read_byte_data(data->client, | |
422 | MMA8452_HP_FILTER_CUTOFF); | |
423 | if (reg < 0) | |
424 | return reg; | |
686027fb | 425 | |
1e79841a MF |
426 | reg &= ~MMA8452_HP_FILTER_CUTOFF_SEL_MASK; |
427 | reg |= i; | |
428 | ||
429 | return mma8452_change_config(data, MMA8452_HP_FILTER_CUTOFF, reg); | |
430 | } | |
431 | ||
c7eeea93 PM |
432 | static int mma8452_write_raw(struct iio_dev *indio_dev, |
433 | struct iio_chan_spec const *chan, | |
434 | int val, int val2, long mask) | |
435 | { | |
436 | struct mma8452_data *data = iio_priv(indio_dev); | |
1e79841a | 437 | int i, ret; |
c7eeea93 PM |
438 | |
439 | if (iio_buffer_enabled(indio_dev)) | |
440 | return -EBUSY; | |
441 | ||
442 | switch (mask) { | |
443 | case IIO_CHAN_INFO_SAMP_FREQ: | |
444 | i = mma8452_get_samp_freq_index(data, val, val2); | |
445 | if (i < 0) | |
b9fddcdb | 446 | return i; |
c7eeea93 PM |
447 | |
448 | data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK; | |
449 | data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT; | |
686027fb | 450 | |
c7eeea93 | 451 | return mma8452_change_config(data, MMA8452_CTRL_REG1, |
686027fb | 452 | data->ctrl_reg1); |
c7eeea93 PM |
453 | case IIO_CHAN_INFO_SCALE: |
454 | i = mma8452_get_scale_index(data, val, val2); | |
455 | if (i < 0) | |
b9fddcdb | 456 | return i; |
686027fb | 457 | |
c7eeea93 PM |
458 | data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK; |
459 | data->data_cfg |= i; | |
686027fb | 460 | |
c7eeea93 | 461 | return mma8452_change_config(data, MMA8452_DATA_CFG, |
686027fb | 462 | data->data_cfg); |
c7eeea93 PM |
463 | case IIO_CHAN_INFO_CALIBBIAS: |
464 | if (val < -128 || val > 127) | |
465 | return -EINVAL; | |
686027fb HK |
466 | |
467 | return mma8452_change_config(data, | |
468 | MMA8452_OFF_X + chan->scan_index, | |
469 | val); | |
1e79841a MF |
470 | |
471 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: | |
472 | if (val == 0 && val2 == 0) { | |
473 | data->data_cfg &= ~MMA8452_DATA_CFG_HPF_MASK; | |
474 | } else { | |
475 | data->data_cfg |= MMA8452_DATA_CFG_HPF_MASK; | |
476 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
477 | if (ret < 0) | |
478 | return ret; | |
479 | } | |
686027fb | 480 | |
1e79841a | 481 | return mma8452_change_config(data, MMA8452_DATA_CFG, |
686027fb | 482 | data->data_cfg); |
1e79841a | 483 | |
c7eeea93 PM |
484 | default: |
485 | return -EINVAL; | |
486 | } | |
487 | } | |
488 | ||
28e34278 MF |
489 | static int mma8452_read_thresh(struct iio_dev *indio_dev, |
490 | const struct iio_chan_spec *chan, | |
491 | enum iio_event_type type, | |
492 | enum iio_event_direction dir, | |
493 | enum iio_event_info info, | |
494 | int *val, int *val2) | |
495 | { | |
496 | struct mma8452_data *data = iio_priv(indio_dev); | |
5dbbd19f | 497 | int ret, us; |
28e34278 | 498 | |
5dbbd19f MF |
499 | switch (info) { |
500 | case IIO_EV_INFO_VALUE: | |
501 | ret = i2c_smbus_read_byte_data(data->client, | |
c3cdd6e4 | 502 | data->chip_info->ev_ths); |
5dbbd19f MF |
503 | if (ret < 0) |
504 | return ret; | |
505 | ||
c3cdd6e4 | 506 | *val = ret & data->chip_info->ev_ths_mask; |
686027fb | 507 | |
5dbbd19f | 508 | return IIO_VAL_INT; |
28e34278 | 509 | |
5dbbd19f MF |
510 | case IIO_EV_INFO_PERIOD: |
511 | ret = i2c_smbus_read_byte_data(data->client, | |
c3cdd6e4 | 512 | data->chip_info->ev_count); |
5dbbd19f MF |
513 | if (ret < 0) |
514 | return ret; | |
515 | ||
516 | us = ret * mma8452_transient_time_step_us[ | |
517 | mma8452_get_odr_index(data)]; | |
518 | *val = us / USEC_PER_SEC; | |
519 | *val2 = us % USEC_PER_SEC; | |
686027fb | 520 | |
5dbbd19f | 521 | return IIO_VAL_INT_PLUS_MICRO; |
28e34278 | 522 | |
1e79841a MF |
523 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: |
524 | ret = i2c_smbus_read_byte_data(data->client, | |
525 | MMA8452_TRANSIENT_CFG); | |
526 | if (ret < 0) | |
527 | return ret; | |
528 | ||
529 | if (ret & MMA8452_TRANSIENT_CFG_HPF_BYP) { | |
530 | *val = 0; | |
531 | *val2 = 0; | |
532 | } else { | |
533 | ret = mma8452_read_hp_filter(data, val, val2); | |
534 | if (ret < 0) | |
535 | return ret; | |
536 | } | |
686027fb | 537 | |
1e79841a MF |
538 | return IIO_VAL_INT_PLUS_MICRO; |
539 | ||
5dbbd19f MF |
540 | default: |
541 | return -EINVAL; | |
542 | } | |
28e34278 MF |
543 | } |
544 | ||
545 | static int mma8452_write_thresh(struct iio_dev *indio_dev, | |
546 | const struct iio_chan_spec *chan, | |
547 | enum iio_event_type type, | |
548 | enum iio_event_direction dir, | |
549 | enum iio_event_info info, | |
550 | int val, int val2) | |
551 | { | |
552 | struct mma8452_data *data = iio_priv(indio_dev); | |
1e79841a | 553 | int ret, reg, steps; |
28e34278 | 554 | |
5dbbd19f MF |
555 | switch (info) { |
556 | case IIO_EV_INFO_VALUE: | |
11218226 HK |
557 | if (val < 0 || val > MMA8452_TRANSIENT_THS_MASK) |
558 | return -EINVAL; | |
559 | ||
c3cdd6e4 MK |
560 | return mma8452_change_config(data, data->chip_info->ev_ths, |
561 | val); | |
5dbbd19f MF |
562 | |
563 | case IIO_EV_INFO_PERIOD: | |
564 | steps = (val * USEC_PER_SEC + val2) / | |
565 | mma8452_transient_time_step_us[ | |
566 | mma8452_get_odr_index(data)]; | |
567 | ||
11218226 | 568 | if (steps < 0 || steps > 0xff) |
5dbbd19f MF |
569 | return -EINVAL; |
570 | ||
c3cdd6e4 | 571 | return mma8452_change_config(data, data->chip_info->ev_count, |
5dbbd19f | 572 | steps); |
686027fb | 573 | |
1e79841a MF |
574 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: |
575 | reg = i2c_smbus_read_byte_data(data->client, | |
576 | MMA8452_TRANSIENT_CFG); | |
577 | if (reg < 0) | |
578 | return reg; | |
579 | ||
580 | if (val == 0 && val2 == 0) { | |
581 | reg |= MMA8452_TRANSIENT_CFG_HPF_BYP; | |
582 | } else { | |
583 | reg &= ~MMA8452_TRANSIENT_CFG_HPF_BYP; | |
584 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
585 | if (ret < 0) | |
586 | return ret; | |
587 | } | |
686027fb | 588 | |
1e79841a MF |
589 | return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, reg); |
590 | ||
5dbbd19f MF |
591 | default: |
592 | return -EINVAL; | |
593 | } | |
28e34278 MF |
594 | } |
595 | ||
596 | static int mma8452_read_event_config(struct iio_dev *indio_dev, | |
597 | const struct iio_chan_spec *chan, | |
598 | enum iio_event_type type, | |
599 | enum iio_event_direction dir) | |
600 | { | |
601 | struct mma8452_data *data = iio_priv(indio_dev); | |
c3cdd6e4 | 602 | const struct mma_chip_info *chip = data->chip_info; |
28e34278 MF |
603 | int ret; |
604 | ||
c3cdd6e4 MK |
605 | ret = i2c_smbus_read_byte_data(data->client, |
606 | data->chip_info->ev_cfg); | |
28e34278 MF |
607 | if (ret < 0) |
608 | return ret; | |
609 | ||
c3cdd6e4 | 610 | return !!(ret & BIT(chan->scan_index + chip->ev_cfg_chan_shift)); |
28e34278 MF |
611 | } |
612 | ||
613 | static int mma8452_write_event_config(struct iio_dev *indio_dev, | |
614 | const struct iio_chan_spec *chan, | |
615 | enum iio_event_type type, | |
616 | enum iio_event_direction dir, | |
617 | int state) | |
618 | { | |
619 | struct mma8452_data *data = iio_priv(indio_dev); | |
c3cdd6e4 | 620 | const struct mma_chip_info *chip = data->chip_info; |
28e34278 MF |
621 | int val; |
622 | ||
c3cdd6e4 | 623 | val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg); |
28e34278 MF |
624 | if (val < 0) |
625 | return val; | |
626 | ||
627 | if (state) | |
c3cdd6e4 | 628 | val |= BIT(chan->scan_index + chip->ev_cfg_chan_shift); |
28e34278 | 629 | else |
c3cdd6e4 | 630 | val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift); |
28e34278 | 631 | |
60f562e7 MK |
632 | val |= chip->ev_cfg_ele; |
633 | val |= MMA8452_FF_MT_CFG_OAE; | |
28e34278 | 634 | |
c3cdd6e4 | 635 | return mma8452_change_config(data, chip->ev_cfg, val); |
28e34278 MF |
636 | } |
637 | ||
638 | static void mma8452_transient_interrupt(struct iio_dev *indio_dev) | |
639 | { | |
640 | struct mma8452_data *data = iio_priv(indio_dev); | |
641 | s64 ts = iio_get_time_ns(); | |
642 | int src; | |
643 | ||
c3cdd6e4 | 644 | src = i2c_smbus_read_byte_data(data->client, data->chip_info->ev_src); |
28e34278 MF |
645 | if (src < 0) |
646 | return; | |
647 | ||
c3cdd6e4 | 648 | if (src & data->chip_info->ev_src_xe) |
28e34278 MF |
649 | iio_push_event(indio_dev, |
650 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, | |
c5d0db06 | 651 | IIO_EV_TYPE_MAG, |
28e34278 MF |
652 | IIO_EV_DIR_RISING), |
653 | ts); | |
654 | ||
c3cdd6e4 | 655 | if (src & data->chip_info->ev_src_ye) |
28e34278 MF |
656 | iio_push_event(indio_dev, |
657 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y, | |
c5d0db06 | 658 | IIO_EV_TYPE_MAG, |
28e34278 MF |
659 | IIO_EV_DIR_RISING), |
660 | ts); | |
661 | ||
c3cdd6e4 | 662 | if (src & data->chip_info->ev_src_ze) |
28e34278 MF |
663 | iio_push_event(indio_dev, |
664 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z, | |
c5d0db06 | 665 | IIO_EV_TYPE_MAG, |
28e34278 MF |
666 | IIO_EV_DIR_RISING), |
667 | ts); | |
668 | } | |
669 | ||
670 | static irqreturn_t mma8452_interrupt(int irq, void *p) | |
671 | { | |
672 | struct iio_dev *indio_dev = p; | |
673 | struct mma8452_data *data = iio_priv(indio_dev); | |
60f562e7 | 674 | const struct mma_chip_info *chip = data->chip_info; |
ae6d9ce0 | 675 | int ret = IRQ_NONE; |
28e34278 MF |
676 | int src; |
677 | ||
678 | src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC); | |
679 | if (src < 0) | |
680 | return IRQ_NONE; | |
681 | ||
ae6d9ce0 MF |
682 | if (src & MMA8452_INT_DRDY) { |
683 | iio_trigger_poll_chained(indio_dev->trig); | |
684 | ret = IRQ_HANDLED; | |
685 | } | |
686 | ||
60f562e7 MK |
687 | if ((src & MMA8452_INT_TRANS && |
688 | chip->ev_src == MMA8452_TRANSIENT_SRC) || | |
689 | (src & MMA8452_INT_FF_MT && | |
690 | chip->ev_src == MMA8452_FF_MT_SRC)) { | |
28e34278 | 691 | mma8452_transient_interrupt(indio_dev); |
ae6d9ce0 | 692 | ret = IRQ_HANDLED; |
28e34278 MF |
693 | } |
694 | ||
ae6d9ce0 | 695 | return ret; |
28e34278 MF |
696 | } |
697 | ||
c7eeea93 PM |
698 | static irqreturn_t mma8452_trigger_handler(int irq, void *p) |
699 | { | |
700 | struct iio_poll_func *pf = p; | |
701 | struct iio_dev *indio_dev = pf->indio_dev; | |
702 | struct mma8452_data *data = iio_priv(indio_dev); | |
703 | u8 buffer[16]; /* 3 16-bit channels + padding + ts */ | |
704 | int ret; | |
705 | ||
686027fb | 706 | ret = mma8452_read(data, (__be16 *)buffer); |
c7eeea93 PM |
707 | if (ret < 0) |
708 | goto done; | |
709 | ||
710 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, | |
686027fb | 711 | iio_get_time_ns()); |
c7eeea93 PM |
712 | |
713 | done: | |
714 | iio_trigger_notify_done(indio_dev->trig); | |
686027fb | 715 | |
c7eeea93 PM |
716 | return IRQ_HANDLED; |
717 | } | |
718 | ||
2a17698c MF |
719 | static int mma8452_reg_access_dbg(struct iio_dev *indio_dev, |
720 | unsigned reg, unsigned writeval, | |
721 | unsigned *readval) | |
722 | { | |
723 | int ret; | |
724 | struct mma8452_data *data = iio_priv(indio_dev); | |
725 | ||
726 | if (reg > MMA8452_MAX_REG) | |
727 | return -EINVAL; | |
728 | ||
729 | if (!readval) | |
730 | return mma8452_change_config(data, reg, writeval); | |
731 | ||
732 | ret = i2c_smbus_read_byte_data(data->client, reg); | |
733 | if (ret < 0) | |
734 | return ret; | |
735 | ||
736 | *readval = ret; | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
28e34278 MF |
741 | static const struct iio_event_spec mma8452_transient_event[] = { |
742 | { | |
c5d0db06 | 743 | .type = IIO_EV_TYPE_MAG, |
28e34278 MF |
744 | .dir = IIO_EV_DIR_RISING, |
745 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
5dbbd19f | 746 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | |
1e79841a MF |
747 | BIT(IIO_EV_INFO_PERIOD) | |
748 | BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB) | |
28e34278 MF |
749 | }, |
750 | }; | |
751 | ||
60f562e7 MK |
752 | static const struct iio_event_spec mma8452_motion_event[] = { |
753 | { | |
754 | .type = IIO_EV_TYPE_MAG, | |
755 | .dir = IIO_EV_DIR_RISING, | |
756 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
757 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
758 | BIT(IIO_EV_INFO_PERIOD) | |
759 | }, | |
760 | }; | |
761 | ||
28e34278 MF |
762 | /* |
763 | * Threshold is configured in fixed 8G/127 steps regardless of | |
764 | * currently selected scale for measurement. | |
765 | */ | |
766 | static IIO_CONST_ATTR_NAMED(accel_transient_scale, in_accel_scale, "0.617742"); | |
767 | ||
768 | static struct attribute *mma8452_event_attributes[] = { | |
769 | &iio_const_attr_accel_transient_scale.dev_attr.attr, | |
770 | NULL, | |
771 | }; | |
772 | ||
773 | static struct attribute_group mma8452_event_attribute_group = { | |
774 | .attrs = mma8452_event_attributes, | |
28e34278 MF |
775 | }; |
776 | ||
c3cdd6e4 | 777 | #define MMA8452_CHANNEL(axis, idx, bits) { \ |
c7eeea93 PM |
778 | .type = IIO_ACCEL, \ |
779 | .modified = 1, \ | |
780 | .channel2 = IIO_MOD_##axis, \ | |
781 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
686027fb | 782 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ |
c7eeea93 | 783 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ |
686027fb HK |
784 | BIT(IIO_CHAN_INFO_SCALE) | \ |
785 | BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ | |
c7eeea93 PM |
786 | .scan_index = idx, \ |
787 | .scan_type = { \ | |
788 | .sign = 's', \ | |
c3cdd6e4 | 789 | .realbits = (bits), \ |
c7eeea93 | 790 | .storagebits = 16, \ |
c3cdd6e4 | 791 | .shift = 16 - (bits), \ |
c7eeea93 PM |
792 | .endianness = IIO_BE, \ |
793 | }, \ | |
28e34278 MF |
794 | .event_spec = mma8452_transient_event, \ |
795 | .num_event_specs = ARRAY_SIZE(mma8452_transient_event), \ | |
c7eeea93 PM |
796 | } |
797 | ||
417e008b MK |
798 | #define MMA8652_CHANNEL(axis, idx, bits) { \ |
799 | .type = IIO_ACCEL, \ | |
800 | .modified = 1, \ | |
801 | .channel2 = IIO_MOD_##axis, \ | |
802 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
803 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ | |
804 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ | |
805 | BIT(IIO_CHAN_INFO_SCALE), \ | |
806 | .scan_index = idx, \ | |
807 | .scan_type = { \ | |
808 | .sign = 's', \ | |
809 | .realbits = (bits), \ | |
810 | .storagebits = 16, \ | |
811 | .shift = 16 - (bits), \ | |
812 | .endianness = IIO_BE, \ | |
813 | }, \ | |
814 | .event_spec = mma8452_motion_event, \ | |
815 | .num_event_specs = ARRAY_SIZE(mma8452_motion_event), \ | |
816 | } | |
817 | ||
c7eeea93 | 818 | static const struct iio_chan_spec mma8452_channels[] = { |
c3cdd6e4 MK |
819 | MMA8452_CHANNEL(X, 0, 12), |
820 | MMA8452_CHANNEL(Y, 1, 12), | |
821 | MMA8452_CHANNEL(Z, 2, 12), | |
c7eeea93 PM |
822 | IIO_CHAN_SOFT_TIMESTAMP(3), |
823 | }; | |
824 | ||
c5ea1b58 MK |
825 | static const struct iio_chan_spec mma8453_channels[] = { |
826 | MMA8452_CHANNEL(X, 0, 10), | |
827 | MMA8452_CHANNEL(Y, 1, 10), | |
828 | MMA8452_CHANNEL(Z, 2, 10), | |
829 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
830 | }; | |
831 | ||
417e008b MK |
832 | static const struct iio_chan_spec mma8652_channels[] = { |
833 | MMA8652_CHANNEL(X, 0, 12), | |
834 | MMA8652_CHANNEL(Y, 1, 12), | |
835 | MMA8652_CHANNEL(Z, 2, 12), | |
836 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
837 | }; | |
838 | ||
839 | static const struct iio_chan_spec mma8653_channels[] = { | |
840 | MMA8652_CHANNEL(X, 0, 10), | |
841 | MMA8652_CHANNEL(Y, 1, 10), | |
842 | MMA8652_CHANNEL(Z, 2, 10), | |
843 | IIO_CHAN_SOFT_TIMESTAMP(3), | |
844 | }; | |
845 | ||
c3cdd6e4 MK |
846 | enum { |
847 | mma8452, | |
c5ea1b58 | 848 | mma8453, |
417e008b MK |
849 | mma8652, |
850 | mma8653, | |
c3cdd6e4 MK |
851 | }; |
852 | ||
853 | static const struct mma_chip_info mma_chip_info_table[] = { | |
854 | [mma8452] = { | |
855 | .chip_id = MMA8452_DEVICE_ID, | |
856 | .channels = mma8452_channels, | |
857 | .num_channels = ARRAY_SIZE(mma8452_channels), | |
858 | /* | |
859 | * Hardware has fullscale of -2G, -4G, -8G corresponding to | |
860 | * raw value -2048 for 12 bit or -512 for 10 bit. | |
861 | * The userspace interface uses m/s^2 and we declare micro units | |
862 | * So scale factor for 12 bit here is given by: | |
863 | * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665 | |
864 | */ | |
865 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, | |
866 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
867 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
868 | .ev_cfg_chan_shift = 1, | |
869 | .ev_src = MMA8452_TRANSIENT_SRC, | |
870 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
871 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
872 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
873 | .ev_ths = MMA8452_TRANSIENT_THS, | |
874 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
875 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
876 | }, | |
c5ea1b58 MK |
877 | [mma8453] = { |
878 | .chip_id = MMA8453_DEVICE_ID, | |
879 | .channels = mma8453_channels, | |
880 | .num_channels = ARRAY_SIZE(mma8453_channels), | |
881 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
882 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
883 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
884 | .ev_cfg_chan_shift = 1, | |
885 | .ev_src = MMA8452_TRANSIENT_SRC, | |
886 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
887 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
888 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
889 | .ev_ths = MMA8452_TRANSIENT_THS, | |
890 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
891 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
892 | }, | |
417e008b MK |
893 | [mma8652] = { |
894 | .chip_id = MMA8652_DEVICE_ID, | |
895 | .channels = mma8652_channels, | |
896 | .num_channels = ARRAY_SIZE(mma8652_channels), | |
897 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, | |
898 | .ev_cfg = MMA8452_FF_MT_CFG, | |
899 | .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE, | |
900 | .ev_cfg_chan_shift = 3, | |
901 | .ev_src = MMA8452_FF_MT_SRC, | |
902 | .ev_src_xe = MMA8452_FF_MT_SRC_XHE, | |
903 | .ev_src_ye = MMA8452_FF_MT_SRC_YHE, | |
904 | .ev_src_ze = MMA8452_FF_MT_SRC_ZHE, | |
905 | .ev_ths = MMA8452_FF_MT_THS, | |
906 | .ev_ths_mask = MMA8452_FF_MT_THS_MASK, | |
907 | .ev_count = MMA8452_FF_MT_COUNT, | |
908 | }, | |
909 | [mma8653] = { | |
910 | .chip_id = MMA8653_DEVICE_ID, | |
911 | .channels = mma8653_channels, | |
912 | .num_channels = ARRAY_SIZE(mma8653_channels), | |
913 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
914 | .ev_cfg = MMA8452_FF_MT_CFG, | |
915 | .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE, | |
916 | .ev_cfg_chan_shift = 3, | |
917 | .ev_src = MMA8452_FF_MT_SRC, | |
918 | .ev_src_xe = MMA8452_FF_MT_SRC_XHE, | |
919 | .ev_src_ye = MMA8452_FF_MT_SRC_YHE, | |
920 | .ev_src_ze = MMA8452_FF_MT_SRC_ZHE, | |
921 | .ev_ths = MMA8452_FF_MT_THS, | |
922 | .ev_ths_mask = MMA8452_FF_MT_THS_MASK, | |
923 | .ev_count = MMA8452_FF_MT_COUNT, | |
924 | }, | |
c3cdd6e4 MK |
925 | }; |
926 | ||
c7eeea93 PM |
927 | static struct attribute *mma8452_attributes[] = { |
928 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, | |
929 | &iio_dev_attr_in_accel_scale_available.dev_attr.attr, | |
1e79841a | 930 | &iio_dev_attr_in_accel_filter_high_pass_3db_frequency_available.dev_attr.attr, |
c7eeea93 PM |
931 | NULL |
932 | }; | |
933 | ||
934 | static const struct attribute_group mma8452_group = { | |
935 | .attrs = mma8452_attributes, | |
936 | }; | |
937 | ||
938 | static const struct iio_info mma8452_info = { | |
939 | .attrs = &mma8452_group, | |
940 | .read_raw = &mma8452_read_raw, | |
941 | .write_raw = &mma8452_write_raw, | |
28e34278 MF |
942 | .event_attrs = &mma8452_event_attribute_group, |
943 | .read_event_value = &mma8452_read_thresh, | |
944 | .write_event_value = &mma8452_write_thresh, | |
945 | .read_event_config = &mma8452_read_event_config, | |
946 | .write_event_config = &mma8452_write_event_config, | |
2a17698c | 947 | .debugfs_reg_access = &mma8452_reg_access_dbg, |
c7eeea93 PM |
948 | .driver_module = THIS_MODULE, |
949 | }; | |
950 | ||
951 | static const unsigned long mma8452_scan_masks[] = {0x7, 0}; | |
952 | ||
ae6d9ce0 MF |
953 | static int mma8452_data_rdy_trigger_set_state(struct iio_trigger *trig, |
954 | bool state) | |
955 | { | |
956 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
957 | struct mma8452_data *data = iio_priv(indio_dev); | |
958 | int reg; | |
959 | ||
960 | reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG4); | |
961 | if (reg < 0) | |
962 | return reg; | |
963 | ||
964 | if (state) | |
965 | reg |= MMA8452_INT_DRDY; | |
966 | else | |
967 | reg &= ~MMA8452_INT_DRDY; | |
968 | ||
969 | return mma8452_change_config(data, MMA8452_CTRL_REG4, reg); | |
970 | } | |
971 | ||
972 | static int mma8452_validate_device(struct iio_trigger *trig, | |
973 | struct iio_dev *indio_dev) | |
974 | { | |
975 | struct iio_dev *indio = iio_trigger_get_drvdata(trig); | |
976 | ||
977 | if (indio != indio_dev) | |
978 | return -EINVAL; | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
983 | static const struct iio_trigger_ops mma8452_trigger_ops = { | |
984 | .set_trigger_state = mma8452_data_rdy_trigger_set_state, | |
985 | .validate_device = mma8452_validate_device, | |
986 | .owner = THIS_MODULE, | |
987 | }; | |
988 | ||
989 | static int mma8452_trigger_setup(struct iio_dev *indio_dev) | |
990 | { | |
991 | struct mma8452_data *data = iio_priv(indio_dev); | |
992 | struct iio_trigger *trig; | |
993 | int ret; | |
994 | ||
995 | trig = devm_iio_trigger_alloc(&data->client->dev, "%s-dev%d", | |
996 | indio_dev->name, | |
997 | indio_dev->id); | |
998 | if (!trig) | |
999 | return -ENOMEM; | |
1000 | ||
1001 | trig->dev.parent = &data->client->dev; | |
1002 | trig->ops = &mma8452_trigger_ops; | |
1003 | iio_trigger_set_drvdata(trig, indio_dev); | |
1004 | ||
1005 | ret = iio_trigger_register(trig); | |
1006 | if (ret) | |
1007 | return ret; | |
1008 | ||
1009 | indio_dev->trig = trig; | |
686027fb | 1010 | |
ae6d9ce0 MF |
1011 | return 0; |
1012 | } | |
1013 | ||
1014 | static void mma8452_trigger_cleanup(struct iio_dev *indio_dev) | |
1015 | { | |
1016 | if (indio_dev->trig) | |
1017 | iio_trigger_unregister(indio_dev->trig); | |
1018 | } | |
1019 | ||
ecabae71 MF |
1020 | static int mma8452_reset(struct i2c_client *client) |
1021 | { | |
1022 | int i; | |
1023 | int ret; | |
1024 | ||
1025 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2, | |
1026 | MMA8452_CTRL_REG2_RST); | |
1027 | if (ret < 0) | |
1028 | return ret; | |
1029 | ||
1030 | for (i = 0; i < 10; i++) { | |
1031 | usleep_range(100, 200); | |
1032 | ret = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG2); | |
1033 | if (ret == -EIO) | |
1034 | continue; /* I2C comm reset */ | |
1035 | if (ret < 0) | |
1036 | return ret; | |
1037 | if (!(ret & MMA8452_CTRL_REG2_RST)) | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | return -ETIMEDOUT; | |
1042 | } | |
1043 | ||
c3cdd6e4 MK |
1044 | static const struct of_device_id mma8452_dt_ids[] = { |
1045 | { .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] }, | |
c5ea1b58 | 1046 | { .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] }, |
417e008b MK |
1047 | { .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] }, |
1048 | { .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] }, | |
c3cdd6e4 MK |
1049 | { } |
1050 | }; | |
1051 | MODULE_DEVICE_TABLE(of, mma8452_dt_ids); | |
1052 | ||
c7eeea93 PM |
1053 | static int mma8452_probe(struct i2c_client *client, |
1054 | const struct i2c_device_id *id) | |
1055 | { | |
1056 | struct mma8452_data *data; | |
1057 | struct iio_dev *indio_dev; | |
1058 | int ret; | |
c3cdd6e4 | 1059 | const struct of_device_id *match; |
c7eeea93 | 1060 | |
c3cdd6e4 MK |
1061 | match = of_match_device(mma8452_dt_ids, &client->dev); |
1062 | if (!match) { | |
1063 | dev_err(&client->dev, "unknown device model\n"); | |
1064 | return -ENODEV; | |
1065 | } | |
1066 | ||
c7eeea93 PM |
1067 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
1068 | if (!indio_dev) | |
1069 | return -ENOMEM; | |
1070 | ||
1071 | data = iio_priv(indio_dev); | |
1072 | data->client = client; | |
1073 | mutex_init(&data->lock); | |
c3cdd6e4 MK |
1074 | data->chip_info = match->data; |
1075 | ||
417e008b MK |
1076 | ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); |
1077 | if (ret < 0) | |
1078 | return ret; | |
1079 | ||
1080 | switch (ret) { | |
1081 | case MMA8452_DEVICE_ID: | |
1082 | case MMA8453_DEVICE_ID: | |
1083 | case MMA8652_DEVICE_ID: | |
1084 | case MMA8653_DEVICE_ID: | |
1085 | if (ret == data->chip_info->chip_id) | |
1086 | break; | |
1087 | default: | |
1088 | return -ENODEV; | |
1089 | } | |
1090 | ||
c3cdd6e4 MK |
1091 | dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", |
1092 | match->compatible, data->chip_info->chip_id); | |
c7eeea93 PM |
1093 | |
1094 | i2c_set_clientdata(client, indio_dev); | |
1095 | indio_dev->info = &mma8452_info; | |
1096 | indio_dev->name = id->name; | |
1097 | indio_dev->dev.parent = &client->dev; | |
1098 | indio_dev->modes = INDIO_DIRECT_MODE; | |
c3cdd6e4 MK |
1099 | indio_dev->channels = data->chip_info->channels; |
1100 | indio_dev->num_channels = data->chip_info->num_channels; | |
c7eeea93 PM |
1101 | indio_dev->available_scan_masks = mma8452_scan_masks; |
1102 | ||
ecabae71 | 1103 | ret = mma8452_reset(client); |
c7eeea93 PM |
1104 | if (ret < 0) |
1105 | return ret; | |
1106 | ||
1107 | data->data_cfg = MMA8452_DATA_CFG_FS_2G; | |
1108 | ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, | |
686027fb | 1109 | data->data_cfg); |
c7eeea93 PM |
1110 | if (ret < 0) |
1111 | return ret; | |
1112 | ||
28e34278 MF |
1113 | /* |
1114 | * By default set transient threshold to max to avoid events if | |
1115 | * enabling without configuring threshold. | |
1116 | */ | |
1117 | ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS, | |
1118 | MMA8452_TRANSIENT_THS_MASK); | |
1119 | if (ret < 0) | |
1120 | return ret; | |
1121 | ||
1122 | if (client->irq) { | |
1123 | /* | |
60f562e7 MK |
1124 | * Although we enable the interrupt sources once and for |
1125 | * all here the event detection itself is not enabled until | |
1126 | * userspace asks for it by mma8452_write_event_config() | |
28e34278 | 1127 | */ |
60f562e7 MK |
1128 | int supported_interrupts = MMA8452_INT_DRDY | |
1129 | MMA8452_INT_TRANS | | |
1130 | MMA8452_INT_FF_MT; | |
1131 | int enabled_interrupts = MMA8452_INT_TRANS | | |
1132 | MMA8452_INT_FF_MT; | |
28e34278 MF |
1133 | |
1134 | /* Assume wired to INT1 pin */ | |
1135 | ret = i2c_smbus_write_byte_data(client, | |
1136 | MMA8452_CTRL_REG5, | |
1137 | supported_interrupts); | |
1138 | if (ret < 0) | |
1139 | return ret; | |
1140 | ||
1141 | ret = i2c_smbus_write_byte_data(client, | |
1142 | MMA8452_CTRL_REG4, | |
ae6d9ce0 MF |
1143 | enabled_interrupts); |
1144 | if (ret < 0) | |
1145 | return ret; | |
1146 | ||
1147 | ret = mma8452_trigger_setup(indio_dev); | |
28e34278 MF |
1148 | if (ret < 0) |
1149 | return ret; | |
1150 | } | |
1151 | ||
ecabae71 | 1152 | data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | |
686027fb | 1153 | (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT); |
ecabae71 MF |
1154 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, |
1155 | data->ctrl_reg1); | |
1156 | if (ret < 0) | |
ae6d9ce0 | 1157 | goto trigger_cleanup; |
ecabae71 | 1158 | |
c7eeea93 | 1159 | ret = iio_triggered_buffer_setup(indio_dev, NULL, |
686027fb | 1160 | mma8452_trigger_handler, NULL); |
c7eeea93 | 1161 | if (ret < 0) |
ae6d9ce0 | 1162 | goto trigger_cleanup; |
c7eeea93 | 1163 | |
28e34278 MF |
1164 | if (client->irq) { |
1165 | ret = devm_request_threaded_irq(&client->dev, | |
1166 | client->irq, | |
1167 | NULL, mma8452_interrupt, | |
1168 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1169 | client->name, indio_dev); | |
1170 | if (ret) | |
1171 | goto buffer_cleanup; | |
1172 | } | |
1173 | ||
c7eeea93 PM |
1174 | ret = iio_device_register(indio_dev); |
1175 | if (ret < 0) | |
1176 | goto buffer_cleanup; | |
28e34278 | 1177 | |
c7eeea93 PM |
1178 | return 0; |
1179 | ||
1180 | buffer_cleanup: | |
1181 | iio_triggered_buffer_cleanup(indio_dev); | |
ae6d9ce0 MF |
1182 | |
1183 | trigger_cleanup: | |
1184 | mma8452_trigger_cleanup(indio_dev); | |
1185 | ||
c7eeea93 PM |
1186 | return ret; |
1187 | } | |
1188 | ||
1189 | static int mma8452_remove(struct i2c_client *client) | |
1190 | { | |
1191 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
1192 | ||
1193 | iio_device_unregister(indio_dev); | |
1194 | iio_triggered_buffer_cleanup(indio_dev); | |
ae6d9ce0 | 1195 | mma8452_trigger_cleanup(indio_dev); |
c7eeea93 PM |
1196 | mma8452_standby(iio_priv(indio_dev)); |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | #ifdef CONFIG_PM_SLEEP | |
1202 | static int mma8452_suspend(struct device *dev) | |
1203 | { | |
1204 | return mma8452_standby(iio_priv(i2c_get_clientdata( | |
1205 | to_i2c_client(dev)))); | |
1206 | } | |
1207 | ||
1208 | static int mma8452_resume(struct device *dev) | |
1209 | { | |
1210 | return mma8452_active(iio_priv(i2c_get_clientdata( | |
1211 | to_i2c_client(dev)))); | |
1212 | } | |
1213 | ||
1214 | static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume); | |
1215 | #define MMA8452_PM_OPS (&mma8452_pm_ops) | |
1216 | #else | |
1217 | #define MMA8452_PM_OPS NULL | |
1218 | #endif | |
1219 | ||
1220 | static const struct i2c_device_id mma8452_id[] = { | |
c3cdd6e4 | 1221 | { "mma8452", mma8452 }, |
c5ea1b58 | 1222 | { "mma8453", mma8453 }, |
417e008b MK |
1223 | { "mma8652", mma8652 }, |
1224 | { "mma8653", mma8653 }, | |
c7eeea93 PM |
1225 | { } |
1226 | }; | |
1227 | MODULE_DEVICE_TABLE(i2c, mma8452_id); | |
1228 | ||
1229 | static struct i2c_driver mma8452_driver = { | |
1230 | .driver = { | |
1231 | .name = "mma8452", | |
a3fb96a8 | 1232 | .of_match_table = of_match_ptr(mma8452_dt_ids), |
c7eeea93 PM |
1233 | .pm = MMA8452_PM_OPS, |
1234 | }, | |
1235 | .probe = mma8452_probe, | |
1236 | .remove = mma8452_remove, | |
1237 | .id_table = mma8452_id, | |
1238 | }; | |
1239 | module_i2c_driver(mma8452_driver); | |
1240 | ||
1241 | MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>"); | |
1242 | MODULE_DESCRIPTION("Freescale MMA8452 accelerometer driver"); | |
1243 | MODULE_LICENSE("GPL"); |