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Commit | Line | Data |
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c7eeea93 | 1 | /* |
f26ab1aa | 2 | * mma8452.c - Support for following Freescale / NXP 3-axis accelerometers: |
c5ea1b58 | 3 | * |
16df666a MK |
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 | |
c7eeea93 | 12 | * |
40836bc3 | 13 | * Copyright 2015 Martin Kepplinger <martink@posteo.de> |
c7eeea93 PM |
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 | * | |
bce59b60 | 20 | * TODO: orientation events |
c7eeea93 PM |
21 | */ |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/iio/iio.h> | |
26 | #include <linux/iio/sysfs.h> | |
c7eeea93 | 27 | #include <linux/iio/buffer.h> |
ae6d9ce0 MF |
28 | #include <linux/iio/trigger.h> |
29 | #include <linux/iio/trigger_consumer.h> | |
c7eeea93 | 30 | #include <linux/iio/triggered_buffer.h> |
28e34278 | 31 | #include <linux/iio/events.h> |
c7eeea93 | 32 | #include <linux/delay.h> |
c3cdd6e4 | 33 | #include <linux/of_device.h> |
d2a3e093 | 34 | #include <linux/of_irq.h> |
96c0cb2b | 35 | #include <linux/pm_runtime.h> |
c7eeea93 | 36 | |
69abff81 HK |
37 | #define MMA8452_STATUS 0x00 |
38 | #define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0)) | |
c5ea1b58 | 39 | #define MMA8452_OUT_X 0x01 /* MSB first */ |
69abff81 HK |
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) | |
60f562e7 MK |
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 | |
69abff81 HK |
62 | #define MMA8452_TRANSIENT_CFG 0x1d |
63 | #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0) | |
69abff81 HK |
64 | #define MMA8452_TRANSIENT_CFG_ELE BIT(4) |
65 | #define MMA8452_TRANSIENT_SRC 0x1e | |
66 | #define MMA8452_TRANSIENT_SRC_XTRANSE BIT(1) | |
67 | #define MMA8452_TRANSIENT_SRC_YTRANSE BIT(3) | |
68 | #define MMA8452_TRANSIENT_SRC_ZTRANSE BIT(5) | |
69 | #define MMA8452_TRANSIENT_THS 0x1f | |
70 | #define MMA8452_TRANSIENT_THS_MASK GENMASK(6, 0) | |
71 | #define MMA8452_TRANSIENT_COUNT 0x20 | |
72 | #define MMA8452_CTRL_REG1 0x2a | |
73 | #define MMA8452_CTRL_ACTIVE BIT(0) | |
74 | #define MMA8452_CTRL_DR_MASK GENMASK(5, 3) | |
75 | #define MMA8452_CTRL_DR_SHIFT 3 | |
76 | #define MMA8452_CTRL_DR_DEFAULT 0x4 /* 50 Hz sample frequency */ | |
77 | #define MMA8452_CTRL_REG2 0x2b | |
78 | #define MMA8452_CTRL_REG2_RST BIT(6) | |
ed859fc1 MK |
79 | #define MMA8452_CTRL_REG2_MODS_SHIFT 3 |
80 | #define MMA8452_CTRL_REG2_MODS_MASK 0x1b | |
69abff81 HK |
81 | #define MMA8452_CTRL_REG4 0x2d |
82 | #define MMA8452_CTRL_REG5 0x2e | |
83 | #define MMA8452_OFF_X 0x2f | |
84 | #define MMA8452_OFF_Y 0x30 | |
85 | #define MMA8452_OFF_Z 0x31 | |
c7eeea93 | 86 | |
69abff81 | 87 | #define MMA8452_MAX_REG 0x31 |
2a17698c | 88 | |
69abff81 | 89 | #define MMA8452_INT_DRDY BIT(0) |
60f562e7 | 90 | #define MMA8452_INT_FF_MT BIT(2) |
69abff81 | 91 | #define MMA8452_INT_TRANS BIT(5) |
c7eeea93 | 92 | |
244a93f6 | 93 | #define MMA8451_DEVICE_ID 0x1a |
36775d57 MK |
94 | #define MMA8452_DEVICE_ID 0x2a |
95 | #define MMA8453_DEVICE_ID 0x3a | |
417e008b MK |
96 | #define MMA8652_DEVICE_ID 0x4a |
97 | #define MMA8653_DEVICE_ID 0x5a | |
e8731180 | 98 | #define FXLS8471_DEVICE_ID 0x6a |
c7eeea93 | 99 | |
96c0cb2b MK |
100 | #define MMA8452_AUTO_SUSPEND_DELAY_MS 2000 |
101 | ||
c7eeea93 PM |
102 | struct mma8452_data { |
103 | struct i2c_client *client; | |
104 | struct mutex lock; | |
105 | u8 ctrl_reg1; | |
106 | u8 data_cfg; | |
c3cdd6e4 MK |
107 | const struct mma_chip_info *chip_info; |
108 | }; | |
109 | ||
110 | /** | |
f26ab1aa | 111 | * struct mma_chip_info - chip specific data |
c3cdd6e4 MK |
112 | * @chip_id: WHO_AM_I register's value |
113 | * @channels: struct iio_chan_spec matching the device's | |
114 | * capabilities | |
115 | * @num_channels: number of channels | |
116 | * @mma_scales: scale factors for converting register values | |
117 | * to m/s^2; 3 modes: 2g, 4g, 8g; 2 integers | |
118 | * per mode: m/s^2 and micro m/s^2 | |
119 | * @ev_cfg: event config register address | |
120 | * @ev_cfg_ele: latch bit in event config register | |
121 | * @ev_cfg_chan_shift: number of the bit to enable events in X | |
122 | * direction; in event config register | |
123 | * @ev_src: event source register address | |
124 | * @ev_src_xe: bit in event source register that indicates | |
125 | * an event in X direction | |
126 | * @ev_src_ye: bit in event source register that indicates | |
127 | * an event in Y direction | |
128 | * @ev_src_ze: bit in event source register that indicates | |
129 | * an event in Z direction | |
130 | * @ev_ths: event threshold register address | |
131 | * @ev_ths_mask: mask for the threshold value | |
132 | * @ev_count: event count (period) register address | |
133 | * | |
134 | * Since not all chips supported by the driver support comparing high pass | |
135 | * filtered data for events (interrupts), different interrupt sources are | |
136 | * used for different chips and the relevant registers are included here. | |
137 | */ | |
138 | struct mma_chip_info { | |
139 | u8 chip_id; | |
140 | const struct iio_chan_spec *channels; | |
141 | int num_channels; | |
142 | const int mma_scales[3][2]; | |
143 | u8 ev_cfg; | |
144 | u8 ev_cfg_ele; | |
145 | u8 ev_cfg_chan_shift; | |
146 | u8 ev_src; | |
147 | u8 ev_src_xe; | |
148 | u8 ev_src_ye; | |
149 | u8 ev_src_ze; | |
150 | u8 ev_ths; | |
151 | u8 ev_ths_mask; | |
152 | u8 ev_count; | |
c7eeea93 PM |
153 | }; |
154 | ||
e60378c1 MK |
155 | enum { |
156 | idx_x, | |
157 | idx_y, | |
158 | idx_z, | |
159 | idx_ts, | |
160 | }; | |
161 | ||
c7eeea93 PM |
162 | static int mma8452_drdy(struct mma8452_data *data) |
163 | { | |
164 | int tries = 150; | |
165 | ||
166 | while (tries-- > 0) { | |
167 | int ret = i2c_smbus_read_byte_data(data->client, | |
168 | MMA8452_STATUS); | |
169 | if (ret < 0) | |
170 | return ret; | |
171 | if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY) | |
172 | return 0; | |
686027fb | 173 | |
c7eeea93 PM |
174 | msleep(20); |
175 | } | |
176 | ||
177 | dev_err(&data->client->dev, "data not ready\n"); | |
686027fb | 178 | |
c7eeea93 PM |
179 | return -EIO; |
180 | } | |
181 | ||
96c0cb2b MK |
182 | static int mma8452_set_runtime_pm_state(struct i2c_client *client, bool on) |
183 | { | |
184 | #ifdef CONFIG_PM | |
185 | int ret; | |
186 | ||
187 | if (on) { | |
188 | ret = pm_runtime_get_sync(&client->dev); | |
189 | } else { | |
190 | pm_runtime_mark_last_busy(&client->dev); | |
191 | ret = pm_runtime_put_autosuspend(&client->dev); | |
192 | } | |
193 | ||
194 | if (ret < 0) { | |
195 | dev_err(&client->dev, | |
196 | "failed to change power state to %d\n", on); | |
197 | if (on) | |
198 | pm_runtime_put_noidle(&client->dev); | |
199 | ||
200 | return ret; | |
201 | } | |
202 | #endif | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
c7eeea93 PM |
207 | static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) |
208 | { | |
209 | int ret = mma8452_drdy(data); | |
686027fb | 210 | |
c7eeea93 PM |
211 | if (ret < 0) |
212 | return ret; | |
686027fb | 213 | |
96c0cb2b MK |
214 | ret = mma8452_set_runtime_pm_state(data->client, true); |
215 | if (ret) | |
216 | return ret; | |
217 | ||
218 | ret = i2c_smbus_read_i2c_block_data(data->client, MMA8452_OUT_X, | |
219 | 3 * sizeof(__be16), (u8 *)buf); | |
220 | ||
221 | ret = mma8452_set_runtime_pm_state(data->client, false); | |
222 | ||
223 | return ret; | |
c7eeea93 PM |
224 | } |
225 | ||
686027fb HK |
226 | static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2], |
227 | int n) | |
c7eeea93 PM |
228 | { |
229 | size_t len = 0; | |
230 | ||
231 | while (n-- > 0) | |
686027fb HK |
232 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", |
233 | vals[n][0], vals[n][1]); | |
c7eeea93 PM |
234 | |
235 | /* replace trailing space by newline */ | |
236 | buf[len - 1] = '\n'; | |
237 | ||
238 | return len; | |
239 | } | |
240 | ||
241 | static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n, | |
686027fb | 242 | int val, int val2) |
c7eeea93 PM |
243 | { |
244 | while (n-- > 0) | |
245 | if (val == vals[n][0] && val2 == vals[n][1]) | |
246 | return n; | |
247 | ||
248 | return -EINVAL; | |
249 | } | |
250 | ||
5dbbd19f MF |
251 | static int mma8452_get_odr_index(struct mma8452_data *data) |
252 | { | |
253 | return (data->ctrl_reg1 & MMA8452_CTRL_DR_MASK) >> | |
254 | MMA8452_CTRL_DR_SHIFT; | |
255 | } | |
256 | ||
c7eeea93 PM |
257 | static const int mma8452_samp_freq[8][2] = { |
258 | {800, 0}, {400, 0}, {200, 0}, {100, 0}, {50, 0}, {12, 500000}, | |
259 | {6, 250000}, {1, 560000} | |
260 | }; | |
261 | ||
ed859fc1 MK |
262 | /* Datasheet table: step time "Relationship with the ODR" (sample frequency) */ |
263 | static const int mma8452_transient_time_step_us[4][8] = { | |
264 | { 1250, 2500, 5000, 10000, 20000, 20000, 20000, 20000 }, /* normal */ | |
265 | { 1250, 2500, 5000, 10000, 20000, 80000, 80000, 80000 }, /* l p l n */ | |
266 | { 1250, 2500, 2500, 2500, 2500, 2500, 2500, 2500 }, /* high res*/ | |
267 | { 1250, 2500, 5000, 10000, 20000, 80000, 160000, 160000 } /* l p */ | |
5dbbd19f MF |
268 | }; |
269 | ||
ed859fc1 MK |
270 | /* Datasheet table "High-Pass Filter Cutoff Options" */ |
271 | static const int mma8452_hp_filter_cutoff[4][8][4][2] = { | |
272 | { /* normal */ | |
1e79841a MF |
273 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 800 Hz sample */ |
274 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, /* 400 Hz sample */ | |
275 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, /* 200 Hz sample */ | |
276 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, /* 100 Hz sample */ | |
277 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 50 Hz sample */ | |
278 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 12.5 Hz sample */ | |
279 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, /* 6.25 Hz sample */ | |
280 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} } /* 1.56 Hz sample */ | |
ed859fc1 MK |
281 | }, |
282 | { /* low noise low power */ | |
283 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
284 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
285 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, | |
286 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, | |
287 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, | |
288 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} }, | |
289 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} }, | |
290 | { {0, 500000}, {0, 250000}, {0, 125000}, {0, 063000} } | |
291 | }, | |
292 | { /* high resolution */ | |
293 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
294 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
295 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
296 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
297 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
298 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
299 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
300 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} } | |
301 | }, | |
302 | { /* low power */ | |
303 | { {16, 0}, {8, 0}, {4, 0}, {2, 0} }, | |
304 | { {8, 0}, {4, 0}, {2, 0}, {1, 0} }, | |
305 | { {4, 0}, {2, 0}, {1, 0}, {0, 500000} }, | |
306 | { {2, 0}, {1, 0}, {0, 500000}, {0, 250000} }, | |
307 | { {1, 0}, {0, 500000}, {0, 250000}, {0, 125000} }, | |
308 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} }, | |
309 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} }, | |
310 | { {0, 250000}, {0, 125000}, {0, 063000}, {0, 031000} } | |
311 | } | |
1e79841a MF |
312 | }; |
313 | ||
ed859fc1 MK |
314 | /* Datasheet table "MODS Oversampling modes averaging values at each ODR" */ |
315 | static const u16 mma8452_os_ratio[4][8] = { | |
316 | /* 800 Hz, 400 Hz, ... , 1.56 Hz */ | |
317 | { 2, 4, 4, 4, 4, 16, 32, 128 }, /* normal */ | |
318 | { 2, 4, 4, 4, 4, 4, 8, 32 }, /* low power low noise */ | |
319 | { 2, 4, 8, 16, 32, 128, 256, 1024 }, /* high resolution */ | |
320 | { 2, 2, 2, 2, 2, 2, 4, 16 } /* low power */ | |
321 | }; | |
322 | ||
323 | static int mma8452_get_power_mode(struct mma8452_data *data) | |
324 | { | |
325 | int reg; | |
326 | ||
327 | reg = i2c_smbus_read_byte_data(data->client, | |
328 | MMA8452_CTRL_REG2); | |
329 | if (reg < 0) | |
330 | return reg; | |
331 | ||
332 | return ((reg & MMA8452_CTRL_REG2_MODS_MASK) >> | |
333 | MMA8452_CTRL_REG2_MODS_SHIFT); | |
334 | } | |
335 | ||
c7eeea93 | 336 | static ssize_t mma8452_show_samp_freq_avail(struct device *dev, |
686027fb HK |
337 | struct device_attribute *attr, |
338 | char *buf) | |
c7eeea93 PM |
339 | { |
340 | return mma8452_show_int_plus_micros(buf, mma8452_samp_freq, | |
686027fb | 341 | ARRAY_SIZE(mma8452_samp_freq)); |
c7eeea93 PM |
342 | } |
343 | ||
344 | static ssize_t mma8452_show_scale_avail(struct device *dev, | |
686027fb HK |
345 | struct device_attribute *attr, |
346 | char *buf) | |
c7eeea93 | 347 | { |
c3cdd6e4 MK |
348 | struct mma8452_data *data = iio_priv(i2c_get_clientdata( |
349 | to_i2c_client(dev))); | |
350 | ||
351 | return mma8452_show_int_plus_micros(buf, data->chip_info->mma_scales, | |
352 | ARRAY_SIZE(data->chip_info->mma_scales)); | |
c7eeea93 PM |
353 | } |
354 | ||
1e79841a MF |
355 | static ssize_t mma8452_show_hp_cutoff_avail(struct device *dev, |
356 | struct device_attribute *attr, | |
357 | char *buf) | |
ed859fc1 MK |
358 | { |
359 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
360 | struct mma8452_data *data = iio_priv(indio_dev); | |
361 | int i, j; | |
362 | ||
363 | i = mma8452_get_odr_index(data); | |
364 | j = mma8452_get_power_mode(data); | |
365 | if (j < 0) | |
366 | return j; | |
367 | ||
368 | return mma8452_show_int_plus_micros(buf, mma8452_hp_filter_cutoff[j][i], | |
369 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0])); | |
370 | } | |
371 | ||
372 | static ssize_t mma8452_show_os_ratio_avail(struct device *dev, | |
373 | struct device_attribute *attr, | |
374 | char *buf) | |
1e79841a MF |
375 | { |
376 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); | |
377 | struct mma8452_data *data = iio_priv(indio_dev); | |
378 | int i = mma8452_get_odr_index(data); | |
ed859fc1 MK |
379 | int j; |
380 | u16 val = 0; | |
381 | size_t len = 0; | |
382 | ||
383 | for (j = 0; j < ARRAY_SIZE(mma8452_os_ratio); j++) { | |
384 | if (val == mma8452_os_ratio[j][i]) | |
385 | continue; | |
386 | ||
387 | val = mma8452_os_ratio[j][i]; | |
388 | ||
389 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", val); | |
390 | } | |
391 | buf[len - 1] = '\n'; | |
1e79841a | 392 | |
ed859fc1 | 393 | return len; |
1e79841a MF |
394 | } |
395 | ||
c7eeea93 PM |
396 | static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail); |
397 | static IIO_DEVICE_ATTR(in_accel_scale_available, S_IRUGO, | |
686027fb | 398 | mma8452_show_scale_avail, NULL, 0); |
1e79841a | 399 | static IIO_DEVICE_ATTR(in_accel_filter_high_pass_3db_frequency_available, |
686027fb | 400 | S_IRUGO, mma8452_show_hp_cutoff_avail, NULL, 0); |
ed859fc1 MK |
401 | static IIO_DEVICE_ATTR(in_accel_oversampling_ratio_available, S_IRUGO, |
402 | mma8452_show_os_ratio_avail, NULL, 0); | |
c7eeea93 PM |
403 | |
404 | static int mma8452_get_samp_freq_index(struct mma8452_data *data, | |
686027fb | 405 | int val, int val2) |
c7eeea93 PM |
406 | { |
407 | return mma8452_get_int_plus_micros_index(mma8452_samp_freq, | |
686027fb HK |
408 | ARRAY_SIZE(mma8452_samp_freq), |
409 | val, val2); | |
c7eeea93 PM |
410 | } |
411 | ||
686027fb | 412 | static int mma8452_get_scale_index(struct mma8452_data *data, int val, int val2) |
c7eeea93 | 413 | { |
c3cdd6e4 MK |
414 | return mma8452_get_int_plus_micros_index(data->chip_info->mma_scales, |
415 | ARRAY_SIZE(data->chip_info->mma_scales), val, val2); | |
c7eeea93 PM |
416 | } |
417 | ||
1e79841a MF |
418 | static int mma8452_get_hp_filter_index(struct mma8452_data *data, |
419 | int val, int val2) | |
420 | { | |
ed859fc1 MK |
421 | int i, j; |
422 | ||
423 | i = mma8452_get_odr_index(data); | |
424 | j = mma8452_get_power_mode(data); | |
425 | if (j < 0) | |
426 | return j; | |
1e79841a | 427 | |
ed859fc1 MK |
428 | return mma8452_get_int_plus_micros_index(mma8452_hp_filter_cutoff[j][i], |
429 | ARRAY_SIZE(mma8452_hp_filter_cutoff[0][0]), val, val2); | |
1e79841a MF |
430 | } |
431 | ||
432 | static int mma8452_read_hp_filter(struct mma8452_data *data, int *hz, int *uHz) | |
433 | { | |
ed859fc1 | 434 | int j, i, ret; |
1e79841a MF |
435 | |
436 | ret = i2c_smbus_read_byte_data(data->client, MMA8452_HP_FILTER_CUTOFF); | |
437 | if (ret < 0) | |
438 | return ret; | |
439 | ||
440 | i = mma8452_get_odr_index(data); | |
ed859fc1 MK |
441 | j = mma8452_get_power_mode(data); |
442 | if (j < 0) | |
443 | return j; | |
444 | ||
1e79841a | 445 | ret &= MMA8452_HP_FILTER_CUTOFF_SEL_MASK; |
ed859fc1 MK |
446 | *hz = mma8452_hp_filter_cutoff[j][i][ret][0]; |
447 | *uHz = mma8452_hp_filter_cutoff[j][i][ret][1]; | |
1e79841a MF |
448 | |
449 | return 0; | |
450 | } | |
451 | ||
c7eeea93 PM |
452 | static int mma8452_read_raw(struct iio_dev *indio_dev, |
453 | struct iio_chan_spec const *chan, | |
454 | int *val, int *val2, long mask) | |
455 | { | |
456 | struct mma8452_data *data = iio_priv(indio_dev); | |
457 | __be16 buffer[3]; | |
458 | int i, ret; | |
459 | ||
460 | switch (mask) { | |
461 | case IIO_CHAN_INFO_RAW: | |
462 | if (iio_buffer_enabled(indio_dev)) | |
463 | return -EBUSY; | |
464 | ||
465 | mutex_lock(&data->lock); | |
466 | ret = mma8452_read(data, buffer); | |
467 | mutex_unlock(&data->lock); | |
468 | if (ret < 0) | |
469 | return ret; | |
686027fb | 470 | |
c3cdd6e4 MK |
471 | *val = sign_extend32(be16_to_cpu( |
472 | buffer[chan->scan_index]) >> chan->scan_type.shift, | |
473 | chan->scan_type.realbits - 1); | |
686027fb | 474 | |
c7eeea93 PM |
475 | return IIO_VAL_INT; |
476 | case IIO_CHAN_INFO_SCALE: | |
477 | i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK; | |
c3cdd6e4 MK |
478 | *val = data->chip_info->mma_scales[i][0]; |
479 | *val2 = data->chip_info->mma_scales[i][1]; | |
686027fb | 480 | |
c7eeea93 PM |
481 | return IIO_VAL_INT_PLUS_MICRO; |
482 | case IIO_CHAN_INFO_SAMP_FREQ: | |
5dbbd19f | 483 | i = mma8452_get_odr_index(data); |
c7eeea93 PM |
484 | *val = mma8452_samp_freq[i][0]; |
485 | *val2 = mma8452_samp_freq[i][1]; | |
686027fb | 486 | |
c7eeea93 PM |
487 | return IIO_VAL_INT_PLUS_MICRO; |
488 | case IIO_CHAN_INFO_CALIBBIAS: | |
686027fb | 489 | ret = i2c_smbus_read_byte_data(data->client, |
8b8ff3a6 MK |
490 | MMA8452_OFF_X + |
491 | chan->scan_index); | |
c7eeea93 PM |
492 | if (ret < 0) |
493 | return ret; | |
686027fb | 494 | |
c7eeea93 | 495 | *val = sign_extend32(ret, 7); |
686027fb | 496 | |
c7eeea93 | 497 | return IIO_VAL_INT; |
1e79841a MF |
498 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: |
499 | if (data->data_cfg & MMA8452_DATA_CFG_HPF_MASK) { | |
500 | ret = mma8452_read_hp_filter(data, val, val2); | |
501 | if (ret < 0) | |
502 | return ret; | |
503 | } else { | |
504 | *val = 0; | |
505 | *val2 = 0; | |
506 | } | |
686027fb | 507 | |
1e79841a | 508 | return IIO_VAL_INT_PLUS_MICRO; |
ed859fc1 MK |
509 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: |
510 | ret = mma8452_get_power_mode(data); | |
511 | if (ret < 0) | |
512 | return ret; | |
513 | ||
514 | i = mma8452_get_odr_index(data); | |
515 | ||
516 | *val = mma8452_os_ratio[ret][i]; | |
517 | return IIO_VAL_INT; | |
c7eeea93 | 518 | } |
686027fb | 519 | |
c7eeea93 PM |
520 | return -EINVAL; |
521 | } | |
522 | ||
523 | static int mma8452_standby(struct mma8452_data *data) | |
524 | { | |
525 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
686027fb | 526 | data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE); |
c7eeea93 PM |
527 | } |
528 | ||
529 | static int mma8452_active(struct mma8452_data *data) | |
530 | { | |
531 | return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1, | |
686027fb | 532 | data->ctrl_reg1); |
c7eeea93 PM |
533 | } |
534 | ||
e866853d MK |
535 | /* returns >0 if active, 0 if in standby and <0 on error */ |
536 | static int mma8452_is_active(struct mma8452_data *data) | |
537 | { | |
538 | int reg; | |
539 | ||
540 | reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG1); | |
541 | if (reg < 0) | |
542 | return reg; | |
543 | ||
544 | return reg & MMA8452_CTRL_ACTIVE; | |
545 | } | |
546 | ||
c7eeea93 PM |
547 | static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val) |
548 | { | |
549 | int ret; | |
e866853d | 550 | int is_active; |
c7eeea93 PM |
551 | |
552 | mutex_lock(&data->lock); | |
553 | ||
e866853d MK |
554 | is_active = mma8452_is_active(data); |
555 | if (is_active < 0) { | |
556 | ret = is_active; | |
c7eeea93 | 557 | goto fail; |
e866853d MK |
558 | } |
559 | ||
560 | /* config can only be changed when in standby */ | |
561 | if (is_active > 0) { | |
562 | ret = mma8452_standby(data); | |
563 | if (ret < 0) | |
564 | goto fail; | |
565 | } | |
c7eeea93 PM |
566 | |
567 | ret = i2c_smbus_write_byte_data(data->client, reg, val); | |
568 | if (ret < 0) | |
569 | goto fail; | |
570 | ||
e866853d MK |
571 | if (is_active > 0) { |
572 | ret = mma8452_active(data); | |
573 | if (ret < 0) | |
574 | goto fail; | |
575 | } | |
c7eeea93 PM |
576 | |
577 | ret = 0; | |
578 | fail: | |
579 | mutex_unlock(&data->lock); | |
686027fb | 580 | |
c7eeea93 PM |
581 | return ret; |
582 | } | |
583 | ||
ed859fc1 MK |
584 | static int mma8452_set_power_mode(struct mma8452_data *data, u8 mode) |
585 | { | |
586 | int reg; | |
587 | ||
588 | reg = i2c_smbus_read_byte_data(data->client, | |
589 | MMA8452_CTRL_REG2); | |
590 | if (reg < 0) | |
591 | return reg; | |
592 | ||
593 | reg &= ~MMA8452_CTRL_REG2_MODS_MASK; | |
594 | reg |= mode << MMA8452_CTRL_REG2_MODS_SHIFT; | |
595 | ||
596 | return mma8452_change_config(data, MMA8452_CTRL_REG2, reg); | |
597 | } | |
598 | ||
8b8ff3a6 | 599 | /* returns >0 if in freefall mode, 0 if not or <0 if an error occurred */ |
4b04266a MK |
600 | static int mma8452_freefall_mode_enabled(struct mma8452_data *data) |
601 | { | |
602 | int val; | |
603 | const struct mma_chip_info *chip = data->chip_info; | |
604 | ||
605 | val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg); | |
606 | if (val < 0) | |
607 | return val; | |
608 | ||
609 | return !(val & MMA8452_FF_MT_CFG_OAE); | |
610 | } | |
611 | ||
612 | static int mma8452_set_freefall_mode(struct mma8452_data *data, bool state) | |
613 | { | |
614 | int val; | |
615 | const struct mma_chip_info *chip = data->chip_info; | |
616 | ||
617 | if ((state && mma8452_freefall_mode_enabled(data)) || | |
618 | (!state && !(mma8452_freefall_mode_enabled(data)))) | |
619 | return 0; | |
620 | ||
621 | val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg); | |
622 | if (val < 0) | |
623 | return val; | |
624 | ||
625 | if (state) { | |
626 | val |= BIT(idx_x + chip->ev_cfg_chan_shift); | |
627 | val |= BIT(idx_y + chip->ev_cfg_chan_shift); | |
628 | val |= BIT(idx_z + chip->ev_cfg_chan_shift); | |
629 | val &= ~MMA8452_FF_MT_CFG_OAE; | |
630 | } else { | |
631 | val &= ~BIT(idx_x + chip->ev_cfg_chan_shift); | |
632 | val &= ~BIT(idx_y + chip->ev_cfg_chan_shift); | |
633 | val &= ~BIT(idx_z + chip->ev_cfg_chan_shift); | |
634 | val |= MMA8452_FF_MT_CFG_OAE; | |
635 | } | |
636 | ||
0ddfd857 | 637 | return mma8452_change_config(data, chip->ev_cfg, val); |
4b04266a MK |
638 | } |
639 | ||
1e79841a MF |
640 | static int mma8452_set_hp_filter_frequency(struct mma8452_data *data, |
641 | int val, int val2) | |
642 | { | |
643 | int i, reg; | |
644 | ||
645 | i = mma8452_get_hp_filter_index(data, val, val2); | |
646 | if (i < 0) | |
b9fddcdb | 647 | return i; |
1e79841a MF |
648 | |
649 | reg = i2c_smbus_read_byte_data(data->client, | |
650 | MMA8452_HP_FILTER_CUTOFF); | |
651 | if (reg < 0) | |
652 | return reg; | |
686027fb | 653 | |
1e79841a MF |
654 | reg &= ~MMA8452_HP_FILTER_CUTOFF_SEL_MASK; |
655 | reg |= i; | |
656 | ||
657 | return mma8452_change_config(data, MMA8452_HP_FILTER_CUTOFF, reg); | |
658 | } | |
659 | ||
c7eeea93 PM |
660 | static int mma8452_write_raw(struct iio_dev *indio_dev, |
661 | struct iio_chan_spec const *chan, | |
662 | int val, int val2, long mask) | |
663 | { | |
664 | struct mma8452_data *data = iio_priv(indio_dev); | |
1e79841a | 665 | int i, ret; |
c7eeea93 PM |
666 | |
667 | if (iio_buffer_enabled(indio_dev)) | |
668 | return -EBUSY; | |
669 | ||
670 | switch (mask) { | |
671 | case IIO_CHAN_INFO_SAMP_FREQ: | |
672 | i = mma8452_get_samp_freq_index(data, val, val2); | |
673 | if (i < 0) | |
b9fddcdb | 674 | return i; |
c7eeea93 PM |
675 | |
676 | data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK; | |
677 | data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT; | |
686027fb | 678 | |
c7eeea93 | 679 | return mma8452_change_config(data, MMA8452_CTRL_REG1, |
686027fb | 680 | data->ctrl_reg1); |
c7eeea93 PM |
681 | case IIO_CHAN_INFO_SCALE: |
682 | i = mma8452_get_scale_index(data, val, val2); | |
683 | if (i < 0) | |
b9fddcdb | 684 | return i; |
686027fb | 685 | |
c7eeea93 PM |
686 | data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK; |
687 | data->data_cfg |= i; | |
686027fb | 688 | |
c7eeea93 | 689 | return mma8452_change_config(data, MMA8452_DATA_CFG, |
686027fb | 690 | data->data_cfg); |
c7eeea93 PM |
691 | case IIO_CHAN_INFO_CALIBBIAS: |
692 | if (val < -128 || val > 127) | |
693 | return -EINVAL; | |
686027fb HK |
694 | |
695 | return mma8452_change_config(data, | |
696 | MMA8452_OFF_X + chan->scan_index, | |
697 | val); | |
1e79841a MF |
698 | |
699 | case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: | |
700 | if (val == 0 && val2 == 0) { | |
701 | data->data_cfg &= ~MMA8452_DATA_CFG_HPF_MASK; | |
702 | } else { | |
703 | data->data_cfg |= MMA8452_DATA_CFG_HPF_MASK; | |
704 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
705 | if (ret < 0) | |
706 | return ret; | |
707 | } | |
686027fb | 708 | |
1e79841a | 709 | return mma8452_change_config(data, MMA8452_DATA_CFG, |
686027fb | 710 | data->data_cfg); |
1e79841a | 711 | |
ed859fc1 MK |
712 | case IIO_CHAN_INFO_OVERSAMPLING_RATIO: |
713 | ret = mma8452_get_odr_index(data); | |
714 | ||
715 | for (i = 0; i < ARRAY_SIZE(mma8452_os_ratio); i++) { | |
716 | if (mma8452_os_ratio[i][ret] == val) | |
717 | return mma8452_set_power_mode(data, i); | |
718 | } | |
719 | ||
c7eeea93 PM |
720 | default: |
721 | return -EINVAL; | |
722 | } | |
723 | } | |
724 | ||
28e34278 MF |
725 | static int mma8452_read_thresh(struct iio_dev *indio_dev, |
726 | const struct iio_chan_spec *chan, | |
727 | enum iio_event_type type, | |
728 | enum iio_event_direction dir, | |
729 | enum iio_event_info info, | |
730 | int *val, int *val2) | |
731 | { | |
732 | struct mma8452_data *data = iio_priv(indio_dev); | |
ed859fc1 | 733 | int ret, us, power_mode; |
28e34278 | 734 | |
5dbbd19f MF |
735 | switch (info) { |
736 | case IIO_EV_INFO_VALUE: | |
737 | ret = i2c_smbus_read_byte_data(data->client, | |
c3cdd6e4 | 738 | data->chip_info->ev_ths); |
5dbbd19f MF |
739 | if (ret < 0) |
740 | return ret; | |
741 | ||
c3cdd6e4 | 742 | *val = ret & data->chip_info->ev_ths_mask; |
686027fb | 743 | |
5dbbd19f | 744 | return IIO_VAL_INT; |
28e34278 | 745 | |
5dbbd19f MF |
746 | case IIO_EV_INFO_PERIOD: |
747 | ret = i2c_smbus_read_byte_data(data->client, | |
c3cdd6e4 | 748 | data->chip_info->ev_count); |
5dbbd19f MF |
749 | if (ret < 0) |
750 | return ret; | |
751 | ||
ed859fc1 MK |
752 | power_mode = mma8452_get_power_mode(data); |
753 | if (power_mode < 0) | |
754 | return power_mode; | |
755 | ||
756 | us = ret * mma8452_transient_time_step_us[power_mode][ | |
5dbbd19f MF |
757 | mma8452_get_odr_index(data)]; |
758 | *val = us / USEC_PER_SEC; | |
759 | *val2 = us % USEC_PER_SEC; | |
686027fb | 760 | |
5dbbd19f | 761 | return IIO_VAL_INT_PLUS_MICRO; |
28e34278 | 762 | |
1e79841a MF |
763 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: |
764 | ret = i2c_smbus_read_byte_data(data->client, | |
765 | MMA8452_TRANSIENT_CFG); | |
766 | if (ret < 0) | |
767 | return ret; | |
768 | ||
769 | if (ret & MMA8452_TRANSIENT_CFG_HPF_BYP) { | |
770 | *val = 0; | |
771 | *val2 = 0; | |
772 | } else { | |
773 | ret = mma8452_read_hp_filter(data, val, val2); | |
774 | if (ret < 0) | |
775 | return ret; | |
776 | } | |
686027fb | 777 | |
1e79841a MF |
778 | return IIO_VAL_INT_PLUS_MICRO; |
779 | ||
5dbbd19f MF |
780 | default: |
781 | return -EINVAL; | |
782 | } | |
28e34278 MF |
783 | } |
784 | ||
785 | static int mma8452_write_thresh(struct iio_dev *indio_dev, | |
786 | const struct iio_chan_spec *chan, | |
787 | enum iio_event_type type, | |
788 | enum iio_event_direction dir, | |
789 | enum iio_event_info info, | |
790 | int val, int val2) | |
791 | { | |
792 | struct mma8452_data *data = iio_priv(indio_dev); | |
1e79841a | 793 | int ret, reg, steps; |
28e34278 | 794 | |
5dbbd19f MF |
795 | switch (info) { |
796 | case IIO_EV_INFO_VALUE: | |
11218226 HK |
797 | if (val < 0 || val > MMA8452_TRANSIENT_THS_MASK) |
798 | return -EINVAL; | |
799 | ||
c3cdd6e4 MK |
800 | return mma8452_change_config(data, data->chip_info->ev_ths, |
801 | val); | |
5dbbd19f MF |
802 | |
803 | case IIO_EV_INFO_PERIOD: | |
ed859fc1 MK |
804 | ret = mma8452_get_power_mode(data); |
805 | if (ret < 0) | |
806 | return ret; | |
807 | ||
5dbbd19f | 808 | steps = (val * USEC_PER_SEC + val2) / |
ed859fc1 | 809 | mma8452_transient_time_step_us[ret][ |
5dbbd19f MF |
810 | mma8452_get_odr_index(data)]; |
811 | ||
11218226 | 812 | if (steps < 0 || steps > 0xff) |
5dbbd19f MF |
813 | return -EINVAL; |
814 | ||
c3cdd6e4 | 815 | return mma8452_change_config(data, data->chip_info->ev_count, |
5dbbd19f | 816 | steps); |
686027fb | 817 | |
1e79841a MF |
818 | case IIO_EV_INFO_HIGH_PASS_FILTER_3DB: |
819 | reg = i2c_smbus_read_byte_data(data->client, | |
820 | MMA8452_TRANSIENT_CFG); | |
821 | if (reg < 0) | |
822 | return reg; | |
823 | ||
824 | if (val == 0 && val2 == 0) { | |
825 | reg |= MMA8452_TRANSIENT_CFG_HPF_BYP; | |
826 | } else { | |
827 | reg &= ~MMA8452_TRANSIENT_CFG_HPF_BYP; | |
828 | ret = mma8452_set_hp_filter_frequency(data, val, val2); | |
829 | if (ret < 0) | |
830 | return ret; | |
831 | } | |
686027fb | 832 | |
1e79841a MF |
833 | return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, reg); |
834 | ||
5dbbd19f MF |
835 | default: |
836 | return -EINVAL; | |
837 | } | |
28e34278 MF |
838 | } |
839 | ||
840 | static int mma8452_read_event_config(struct iio_dev *indio_dev, | |
841 | const struct iio_chan_spec *chan, | |
842 | enum iio_event_type type, | |
843 | enum iio_event_direction dir) | |
844 | { | |
845 | struct mma8452_data *data = iio_priv(indio_dev); | |
c3cdd6e4 | 846 | const struct mma_chip_info *chip = data->chip_info; |
28e34278 MF |
847 | int ret; |
848 | ||
4b04266a MK |
849 | switch (dir) { |
850 | case IIO_EV_DIR_FALLING: | |
851 | return mma8452_freefall_mode_enabled(data); | |
852 | case IIO_EV_DIR_RISING: | |
853 | if (mma8452_freefall_mode_enabled(data)) | |
854 | return 0; | |
855 | ||
856 | ret = i2c_smbus_read_byte_data(data->client, | |
857 | data->chip_info->ev_cfg); | |
858 | if (ret < 0) | |
859 | return ret; | |
28e34278 | 860 | |
8b8ff3a6 MK |
861 | return !!(ret & BIT(chan->scan_index + |
862 | chip->ev_cfg_chan_shift)); | |
4b04266a MK |
863 | default: |
864 | return -EINVAL; | |
865 | } | |
28e34278 MF |
866 | } |
867 | ||
868 | static int mma8452_write_event_config(struct iio_dev *indio_dev, | |
869 | const struct iio_chan_spec *chan, | |
870 | enum iio_event_type type, | |
871 | enum iio_event_direction dir, | |
872 | int state) | |
873 | { | |
874 | struct mma8452_data *data = iio_priv(indio_dev); | |
c3cdd6e4 | 875 | const struct mma_chip_info *chip = data->chip_info; |
96c0cb2b MK |
876 | int val, ret; |
877 | ||
878 | ret = mma8452_set_runtime_pm_state(data->client, state); | |
879 | if (ret) | |
880 | return ret; | |
28e34278 | 881 | |
4b04266a MK |
882 | switch (dir) { |
883 | case IIO_EV_DIR_FALLING: | |
884 | return mma8452_set_freefall_mode(data, state); | |
885 | case IIO_EV_DIR_RISING: | |
886 | val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg); | |
887 | if (val < 0) | |
888 | return val; | |
889 | ||
890 | if (state) { | |
891 | if (mma8452_freefall_mode_enabled(data)) { | |
892 | val &= ~BIT(idx_x + chip->ev_cfg_chan_shift); | |
893 | val &= ~BIT(idx_y + chip->ev_cfg_chan_shift); | |
894 | val &= ~BIT(idx_z + chip->ev_cfg_chan_shift); | |
895 | val |= MMA8452_FF_MT_CFG_OAE; | |
896 | } | |
897 | val |= BIT(chan->scan_index + chip->ev_cfg_chan_shift); | |
898 | } else { | |
899 | if (mma8452_freefall_mode_enabled(data)) | |
900 | return 0; | |
28e34278 | 901 | |
4b04266a MK |
902 | val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift); |
903 | } | |
28e34278 | 904 | |
4b04266a | 905 | val |= chip->ev_cfg_ele; |
28e34278 | 906 | |
4b04266a MK |
907 | return mma8452_change_config(data, chip->ev_cfg, val); |
908 | default: | |
909 | return -EINVAL; | |
910 | } | |
28e34278 MF |
911 | } |
912 | ||
913 | static void mma8452_transient_interrupt(struct iio_dev *indio_dev) | |
914 | { | |
915 | struct mma8452_data *data = iio_priv(indio_dev); | |
bc2b7dab | 916 | s64 ts = iio_get_time_ns(indio_dev); |
28e34278 MF |
917 | int src; |
918 | ||
c3cdd6e4 | 919 | src = i2c_smbus_read_byte_data(data->client, data->chip_info->ev_src); |
28e34278 MF |
920 | if (src < 0) |
921 | return; | |
922 | ||
4b04266a MK |
923 | if (mma8452_freefall_mode_enabled(data)) { |
924 | iio_push_event(indio_dev, | |
925 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, | |
926 | IIO_MOD_X_AND_Y_AND_Z, | |
927 | IIO_EV_TYPE_MAG, | |
928 | IIO_EV_DIR_FALLING), | |
929 | ts); | |
930 | return; | |
931 | } | |
932 | ||
c3cdd6e4 | 933 | if (src & data->chip_info->ev_src_xe) |
28e34278 MF |
934 | iio_push_event(indio_dev, |
935 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X, | |
c5d0db06 | 936 | IIO_EV_TYPE_MAG, |
28e34278 MF |
937 | IIO_EV_DIR_RISING), |
938 | ts); | |
939 | ||
c3cdd6e4 | 940 | if (src & data->chip_info->ev_src_ye) |
28e34278 MF |
941 | iio_push_event(indio_dev, |
942 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y, | |
c5d0db06 | 943 | IIO_EV_TYPE_MAG, |
28e34278 MF |
944 | IIO_EV_DIR_RISING), |
945 | ts); | |
946 | ||
c3cdd6e4 | 947 | if (src & data->chip_info->ev_src_ze) |
28e34278 MF |
948 | iio_push_event(indio_dev, |
949 | IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z, | |
c5d0db06 | 950 | IIO_EV_TYPE_MAG, |
28e34278 MF |
951 | IIO_EV_DIR_RISING), |
952 | ts); | |
953 | } | |
954 | ||
955 | static irqreturn_t mma8452_interrupt(int irq, void *p) | |
956 | { | |
957 | struct iio_dev *indio_dev = p; | |
958 | struct mma8452_data *data = iio_priv(indio_dev); | |
60f562e7 | 959 | const struct mma_chip_info *chip = data->chip_info; |
ae6d9ce0 | 960 | int ret = IRQ_NONE; |
28e34278 MF |
961 | int src; |
962 | ||
963 | src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC); | |
964 | if (src < 0) | |
965 | return IRQ_NONE; | |
966 | ||
ae6d9ce0 MF |
967 | if (src & MMA8452_INT_DRDY) { |
968 | iio_trigger_poll_chained(indio_dev->trig); | |
969 | ret = IRQ_HANDLED; | |
970 | } | |
971 | ||
60f562e7 MK |
972 | if ((src & MMA8452_INT_TRANS && |
973 | chip->ev_src == MMA8452_TRANSIENT_SRC) || | |
974 | (src & MMA8452_INT_FF_MT && | |
975 | chip->ev_src == MMA8452_FF_MT_SRC)) { | |
28e34278 | 976 | mma8452_transient_interrupt(indio_dev); |
ae6d9ce0 | 977 | ret = IRQ_HANDLED; |
28e34278 MF |
978 | } |
979 | ||
ae6d9ce0 | 980 | return ret; |
28e34278 MF |
981 | } |
982 | ||
c7eeea93 PM |
983 | static irqreturn_t mma8452_trigger_handler(int irq, void *p) |
984 | { | |
985 | struct iio_poll_func *pf = p; | |
986 | struct iio_dev *indio_dev = pf->indio_dev; | |
987 | struct mma8452_data *data = iio_priv(indio_dev); | |
988 | u8 buffer[16]; /* 3 16-bit channels + padding + ts */ | |
989 | int ret; | |
990 | ||
686027fb | 991 | ret = mma8452_read(data, (__be16 *)buffer); |
c7eeea93 PM |
992 | if (ret < 0) |
993 | goto done; | |
994 | ||
995 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, | |
bc2b7dab | 996 | iio_get_time_ns(indio_dev)); |
c7eeea93 PM |
997 | |
998 | done: | |
999 | iio_trigger_notify_done(indio_dev->trig); | |
686027fb | 1000 | |
c7eeea93 PM |
1001 | return IRQ_HANDLED; |
1002 | } | |
1003 | ||
2a17698c MF |
1004 | static int mma8452_reg_access_dbg(struct iio_dev *indio_dev, |
1005 | unsigned reg, unsigned writeval, | |
1006 | unsigned *readval) | |
1007 | { | |
1008 | int ret; | |
1009 | struct mma8452_data *data = iio_priv(indio_dev); | |
1010 | ||
1011 | if (reg > MMA8452_MAX_REG) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | if (!readval) | |
1015 | return mma8452_change_config(data, reg, writeval); | |
1016 | ||
1017 | ret = i2c_smbus_read_byte_data(data->client, reg); | |
1018 | if (ret < 0) | |
1019 | return ret; | |
1020 | ||
1021 | *readval = ret; | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
4b04266a MK |
1026 | static const struct iio_event_spec mma8452_freefall_event[] = { |
1027 | { | |
1028 | .type = IIO_EV_TYPE_MAG, | |
1029 | .dir = IIO_EV_DIR_FALLING, | |
1030 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1031 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1032 | BIT(IIO_EV_INFO_PERIOD) | | |
1033 | BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB) | |
1034 | }, | |
1035 | }; | |
1036 | ||
1037 | static const struct iio_event_spec mma8652_freefall_event[] = { | |
1038 | { | |
1039 | .type = IIO_EV_TYPE_MAG, | |
1040 | .dir = IIO_EV_DIR_FALLING, | |
1041 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1042 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1043 | BIT(IIO_EV_INFO_PERIOD) | |
1044 | }, | |
1045 | }; | |
1046 | ||
28e34278 MF |
1047 | static const struct iio_event_spec mma8452_transient_event[] = { |
1048 | { | |
c5d0db06 | 1049 | .type = IIO_EV_TYPE_MAG, |
28e34278 MF |
1050 | .dir = IIO_EV_DIR_RISING, |
1051 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
5dbbd19f | 1052 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | |
1e79841a MF |
1053 | BIT(IIO_EV_INFO_PERIOD) | |
1054 | BIT(IIO_EV_INFO_HIGH_PASS_FILTER_3DB) | |
28e34278 MF |
1055 | }, |
1056 | }; | |
1057 | ||
60f562e7 MK |
1058 | static const struct iio_event_spec mma8452_motion_event[] = { |
1059 | { | |
1060 | .type = IIO_EV_TYPE_MAG, | |
1061 | .dir = IIO_EV_DIR_RISING, | |
1062 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), | |
1063 | .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) | | |
1064 | BIT(IIO_EV_INFO_PERIOD) | |
1065 | }, | |
1066 | }; | |
1067 | ||
28e34278 MF |
1068 | /* |
1069 | * Threshold is configured in fixed 8G/127 steps regardless of | |
1070 | * currently selected scale for measurement. | |
1071 | */ | |
1072 | static IIO_CONST_ATTR_NAMED(accel_transient_scale, in_accel_scale, "0.617742"); | |
1073 | ||
1074 | static struct attribute *mma8452_event_attributes[] = { | |
1075 | &iio_const_attr_accel_transient_scale.dev_attr.attr, | |
1076 | NULL, | |
1077 | }; | |
1078 | ||
1079 | static struct attribute_group mma8452_event_attribute_group = { | |
1080 | .attrs = mma8452_event_attributes, | |
28e34278 MF |
1081 | }; |
1082 | ||
4b04266a MK |
1083 | #define MMA8452_FREEFALL_CHANNEL(modifier) { \ |
1084 | .type = IIO_ACCEL, \ | |
1085 | .modified = 1, \ | |
1086 | .channel2 = modifier, \ | |
1087 | .scan_index = -1, \ | |
1088 | .event_spec = mma8452_freefall_event, \ | |
1089 | .num_event_specs = ARRAY_SIZE(mma8452_freefall_event), \ | |
1090 | } | |
1091 | ||
1092 | #define MMA8652_FREEFALL_CHANNEL(modifier) { \ | |
1093 | .type = IIO_ACCEL, \ | |
1094 | .modified = 1, \ | |
1095 | .channel2 = modifier, \ | |
1096 | .scan_index = -1, \ | |
1097 | .event_spec = mma8652_freefall_event, \ | |
1098 | .num_event_specs = ARRAY_SIZE(mma8652_freefall_event), \ | |
1099 | } | |
1100 | ||
c3cdd6e4 | 1101 | #define MMA8452_CHANNEL(axis, idx, bits) { \ |
c7eeea93 PM |
1102 | .type = IIO_ACCEL, \ |
1103 | .modified = 1, \ | |
1104 | .channel2 = IIO_MOD_##axis, \ | |
1105 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
686027fb | 1106 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ |
c7eeea93 | 1107 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ |
686027fb | 1108 | BIT(IIO_CHAN_INFO_SCALE) | \ |
ed859fc1 MK |
1109 | BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY) | \ |
1110 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ | |
c7eeea93 PM |
1111 | .scan_index = idx, \ |
1112 | .scan_type = { \ | |
1113 | .sign = 's', \ | |
c3cdd6e4 | 1114 | .realbits = (bits), \ |
c7eeea93 | 1115 | .storagebits = 16, \ |
c3cdd6e4 | 1116 | .shift = 16 - (bits), \ |
c7eeea93 PM |
1117 | .endianness = IIO_BE, \ |
1118 | }, \ | |
28e34278 MF |
1119 | .event_spec = mma8452_transient_event, \ |
1120 | .num_event_specs = ARRAY_SIZE(mma8452_transient_event), \ | |
c7eeea93 PM |
1121 | } |
1122 | ||
417e008b MK |
1123 | #define MMA8652_CHANNEL(axis, idx, bits) { \ |
1124 | .type = IIO_ACCEL, \ | |
1125 | .modified = 1, \ | |
1126 | .channel2 = IIO_MOD_##axis, \ | |
1127 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
1128 | BIT(IIO_CHAN_INFO_CALIBBIAS), \ | |
1129 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ | |
ed859fc1 MK |
1130 | BIT(IIO_CHAN_INFO_SCALE) | \ |
1131 | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ | |
417e008b MK |
1132 | .scan_index = idx, \ |
1133 | .scan_type = { \ | |
1134 | .sign = 's', \ | |
1135 | .realbits = (bits), \ | |
1136 | .storagebits = 16, \ | |
1137 | .shift = 16 - (bits), \ | |
1138 | .endianness = IIO_BE, \ | |
1139 | }, \ | |
1140 | .event_spec = mma8452_motion_event, \ | |
1141 | .num_event_specs = ARRAY_SIZE(mma8452_motion_event), \ | |
1142 | } | |
1143 | ||
244a93f6 MK |
1144 | static const struct iio_chan_spec mma8451_channels[] = { |
1145 | MMA8452_CHANNEL(X, idx_x, 14), | |
1146 | MMA8452_CHANNEL(Y, idx_y, 14), | |
1147 | MMA8452_CHANNEL(Z, idx_z, 14), | |
1148 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
1149 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), | |
1150 | }; | |
1151 | ||
c7eeea93 | 1152 | static const struct iio_chan_spec mma8452_channels[] = { |
e60378c1 MK |
1153 | MMA8452_CHANNEL(X, idx_x, 12), |
1154 | MMA8452_CHANNEL(Y, idx_y, 12), | |
1155 | MMA8452_CHANNEL(Z, idx_z, 12), | |
1156 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
4b04266a | 1157 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), |
c7eeea93 PM |
1158 | }; |
1159 | ||
c5ea1b58 | 1160 | static const struct iio_chan_spec mma8453_channels[] = { |
e60378c1 MK |
1161 | MMA8452_CHANNEL(X, idx_x, 10), |
1162 | MMA8452_CHANNEL(Y, idx_y, 10), | |
1163 | MMA8452_CHANNEL(Z, idx_z, 10), | |
1164 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
4b04266a | 1165 | MMA8452_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), |
c5ea1b58 MK |
1166 | }; |
1167 | ||
417e008b | 1168 | static const struct iio_chan_spec mma8652_channels[] = { |
e60378c1 MK |
1169 | MMA8652_CHANNEL(X, idx_x, 12), |
1170 | MMA8652_CHANNEL(Y, idx_y, 12), | |
1171 | MMA8652_CHANNEL(Z, idx_z, 12), | |
1172 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
4b04266a | 1173 | MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), |
417e008b MK |
1174 | }; |
1175 | ||
1176 | static const struct iio_chan_spec mma8653_channels[] = { | |
e60378c1 MK |
1177 | MMA8652_CHANNEL(X, idx_x, 10), |
1178 | MMA8652_CHANNEL(Y, idx_y, 10), | |
1179 | MMA8652_CHANNEL(Z, idx_z, 10), | |
1180 | IIO_CHAN_SOFT_TIMESTAMP(idx_ts), | |
4b04266a | 1181 | MMA8652_FREEFALL_CHANNEL(IIO_MOD_X_AND_Y_AND_Z), |
417e008b MK |
1182 | }; |
1183 | ||
c3cdd6e4 | 1184 | enum { |
244a93f6 | 1185 | mma8451, |
c3cdd6e4 | 1186 | mma8452, |
c5ea1b58 | 1187 | mma8453, |
417e008b MK |
1188 | mma8652, |
1189 | mma8653, | |
e8731180 | 1190 | fxls8471, |
c3cdd6e4 MK |
1191 | }; |
1192 | ||
1193 | static const struct mma_chip_info mma_chip_info_table[] = { | |
244a93f6 MK |
1194 | [mma8451] = { |
1195 | .chip_id = MMA8451_DEVICE_ID, | |
1196 | .channels = mma8451_channels, | |
1197 | .num_channels = ARRAY_SIZE(mma8451_channels), | |
c3cdd6e4 MK |
1198 | /* |
1199 | * Hardware has fullscale of -2G, -4G, -8G corresponding to | |
244a93f6 MK |
1200 | * raw value -8192 for 14 bit, -2048 for 12 bit or -512 for 10 |
1201 | * bit. | |
c3cdd6e4 MK |
1202 | * The userspace interface uses m/s^2 and we declare micro units |
1203 | * So scale factor for 12 bit here is given by: | |
8b8ff3a6 | 1204 | * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665 |
c3cdd6e4 | 1205 | */ |
244a93f6 MK |
1206 | .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} }, |
1207 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
1208 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
1209 | .ev_cfg_chan_shift = 1, | |
1210 | .ev_src = MMA8452_TRANSIENT_SRC, | |
1211 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
1212 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
1213 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
1214 | .ev_ths = MMA8452_TRANSIENT_THS, | |
1215 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
1216 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
1217 | }, | |
1218 | [mma8452] = { | |
1219 | .chip_id = MMA8452_DEVICE_ID, | |
1220 | .channels = mma8452_channels, | |
1221 | .num_channels = ARRAY_SIZE(mma8452_channels), | |
c3cdd6e4 MK |
1222 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, |
1223 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
1224 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
1225 | .ev_cfg_chan_shift = 1, | |
1226 | .ev_src = MMA8452_TRANSIENT_SRC, | |
1227 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
1228 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
1229 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
1230 | .ev_ths = MMA8452_TRANSIENT_THS, | |
1231 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
1232 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
1233 | }, | |
c5ea1b58 MK |
1234 | [mma8453] = { |
1235 | .chip_id = MMA8453_DEVICE_ID, | |
1236 | .channels = mma8453_channels, | |
1237 | .num_channels = ARRAY_SIZE(mma8453_channels), | |
1238 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
1239 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
1240 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
1241 | .ev_cfg_chan_shift = 1, | |
1242 | .ev_src = MMA8452_TRANSIENT_SRC, | |
1243 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
1244 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
1245 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
1246 | .ev_ths = MMA8452_TRANSIENT_THS, | |
1247 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
1248 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
1249 | }, | |
417e008b MK |
1250 | [mma8652] = { |
1251 | .chip_id = MMA8652_DEVICE_ID, | |
1252 | .channels = mma8652_channels, | |
1253 | .num_channels = ARRAY_SIZE(mma8652_channels), | |
1254 | .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} }, | |
1255 | .ev_cfg = MMA8452_FF_MT_CFG, | |
1256 | .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE, | |
1257 | .ev_cfg_chan_shift = 3, | |
1258 | .ev_src = MMA8452_FF_MT_SRC, | |
1259 | .ev_src_xe = MMA8452_FF_MT_SRC_XHE, | |
1260 | .ev_src_ye = MMA8452_FF_MT_SRC_YHE, | |
1261 | .ev_src_ze = MMA8452_FF_MT_SRC_ZHE, | |
1262 | .ev_ths = MMA8452_FF_MT_THS, | |
1263 | .ev_ths_mask = MMA8452_FF_MT_THS_MASK, | |
1264 | .ev_count = MMA8452_FF_MT_COUNT, | |
1265 | }, | |
1266 | [mma8653] = { | |
1267 | .chip_id = MMA8653_DEVICE_ID, | |
1268 | .channels = mma8653_channels, | |
1269 | .num_channels = ARRAY_SIZE(mma8653_channels), | |
1270 | .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} }, | |
1271 | .ev_cfg = MMA8452_FF_MT_CFG, | |
1272 | .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE, | |
1273 | .ev_cfg_chan_shift = 3, | |
1274 | .ev_src = MMA8452_FF_MT_SRC, | |
1275 | .ev_src_xe = MMA8452_FF_MT_SRC_XHE, | |
1276 | .ev_src_ye = MMA8452_FF_MT_SRC_YHE, | |
1277 | .ev_src_ze = MMA8452_FF_MT_SRC_ZHE, | |
1278 | .ev_ths = MMA8452_FF_MT_THS, | |
1279 | .ev_ths_mask = MMA8452_FF_MT_THS_MASK, | |
1280 | .ev_count = MMA8452_FF_MT_COUNT, | |
1281 | }, | |
e8731180 MK |
1282 | [fxls8471] = { |
1283 | .chip_id = FXLS8471_DEVICE_ID, | |
1284 | .channels = mma8451_channels, | |
1285 | .num_channels = ARRAY_SIZE(mma8451_channels), | |
1286 | .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} }, | |
1287 | .ev_cfg = MMA8452_TRANSIENT_CFG, | |
1288 | .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE, | |
1289 | .ev_cfg_chan_shift = 1, | |
1290 | .ev_src = MMA8452_TRANSIENT_SRC, | |
1291 | .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE, | |
1292 | .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE, | |
1293 | .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE, | |
1294 | .ev_ths = MMA8452_TRANSIENT_THS, | |
1295 | .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK, | |
1296 | .ev_count = MMA8452_TRANSIENT_COUNT, | |
1297 | }, | |
c3cdd6e4 MK |
1298 | }; |
1299 | ||
c7eeea93 PM |
1300 | static struct attribute *mma8452_attributes[] = { |
1301 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, | |
1302 | &iio_dev_attr_in_accel_scale_available.dev_attr.attr, | |
1e79841a | 1303 | &iio_dev_attr_in_accel_filter_high_pass_3db_frequency_available.dev_attr.attr, |
ed859fc1 | 1304 | &iio_dev_attr_in_accel_oversampling_ratio_available.dev_attr.attr, |
c7eeea93 PM |
1305 | NULL |
1306 | }; | |
1307 | ||
1308 | static const struct attribute_group mma8452_group = { | |
1309 | .attrs = mma8452_attributes, | |
1310 | }; | |
1311 | ||
1312 | static const struct iio_info mma8452_info = { | |
1313 | .attrs = &mma8452_group, | |
1314 | .read_raw = &mma8452_read_raw, | |
1315 | .write_raw = &mma8452_write_raw, | |
28e34278 MF |
1316 | .event_attrs = &mma8452_event_attribute_group, |
1317 | .read_event_value = &mma8452_read_thresh, | |
1318 | .write_event_value = &mma8452_write_thresh, | |
1319 | .read_event_config = &mma8452_read_event_config, | |
1320 | .write_event_config = &mma8452_write_event_config, | |
2a17698c | 1321 | .debugfs_reg_access = &mma8452_reg_access_dbg, |
c7eeea93 PM |
1322 | .driver_module = THIS_MODULE, |
1323 | }; | |
1324 | ||
1325 | static const unsigned long mma8452_scan_masks[] = {0x7, 0}; | |
1326 | ||
ae6d9ce0 MF |
1327 | static int mma8452_data_rdy_trigger_set_state(struct iio_trigger *trig, |
1328 | bool state) | |
1329 | { | |
1330 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
1331 | struct mma8452_data *data = iio_priv(indio_dev); | |
96c0cb2b MK |
1332 | int reg, ret; |
1333 | ||
1334 | ret = mma8452_set_runtime_pm_state(data->client, state); | |
1335 | if (ret) | |
1336 | return ret; | |
ae6d9ce0 MF |
1337 | |
1338 | reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG4); | |
1339 | if (reg < 0) | |
1340 | return reg; | |
1341 | ||
1342 | if (state) | |
1343 | reg |= MMA8452_INT_DRDY; | |
1344 | else | |
1345 | reg &= ~MMA8452_INT_DRDY; | |
1346 | ||
1347 | return mma8452_change_config(data, MMA8452_CTRL_REG4, reg); | |
1348 | } | |
1349 | ||
1350 | static int mma8452_validate_device(struct iio_trigger *trig, | |
1351 | struct iio_dev *indio_dev) | |
1352 | { | |
1353 | struct iio_dev *indio = iio_trigger_get_drvdata(trig); | |
1354 | ||
1355 | if (indio != indio_dev) | |
1356 | return -EINVAL; | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static const struct iio_trigger_ops mma8452_trigger_ops = { | |
1362 | .set_trigger_state = mma8452_data_rdy_trigger_set_state, | |
1363 | .validate_device = mma8452_validate_device, | |
1364 | .owner = THIS_MODULE, | |
1365 | }; | |
1366 | ||
1367 | static int mma8452_trigger_setup(struct iio_dev *indio_dev) | |
1368 | { | |
1369 | struct mma8452_data *data = iio_priv(indio_dev); | |
1370 | struct iio_trigger *trig; | |
1371 | int ret; | |
1372 | ||
1373 | trig = devm_iio_trigger_alloc(&data->client->dev, "%s-dev%d", | |
1374 | indio_dev->name, | |
1375 | indio_dev->id); | |
1376 | if (!trig) | |
1377 | return -ENOMEM; | |
1378 | ||
1379 | trig->dev.parent = &data->client->dev; | |
1380 | trig->ops = &mma8452_trigger_ops; | |
1381 | iio_trigger_set_drvdata(trig, indio_dev); | |
1382 | ||
1383 | ret = iio_trigger_register(trig); | |
1384 | if (ret) | |
1385 | return ret; | |
1386 | ||
1387 | indio_dev->trig = trig; | |
686027fb | 1388 | |
ae6d9ce0 MF |
1389 | return 0; |
1390 | } | |
1391 | ||
1392 | static void mma8452_trigger_cleanup(struct iio_dev *indio_dev) | |
1393 | { | |
1394 | if (indio_dev->trig) | |
1395 | iio_trigger_unregister(indio_dev->trig); | |
1396 | } | |
1397 | ||
ecabae71 MF |
1398 | static int mma8452_reset(struct i2c_client *client) |
1399 | { | |
1400 | int i; | |
1401 | int ret; | |
1402 | ||
1403 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG2, | |
1404 | MMA8452_CTRL_REG2_RST); | |
1405 | if (ret < 0) | |
1406 | return ret; | |
1407 | ||
1408 | for (i = 0; i < 10; i++) { | |
1409 | usleep_range(100, 200); | |
1410 | ret = i2c_smbus_read_byte_data(client, MMA8452_CTRL_REG2); | |
1411 | if (ret == -EIO) | |
1412 | continue; /* I2C comm reset */ | |
1413 | if (ret < 0) | |
1414 | return ret; | |
1415 | if (!(ret & MMA8452_CTRL_REG2_RST)) | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1419 | return -ETIMEDOUT; | |
1420 | } | |
1421 | ||
c3cdd6e4 | 1422 | static const struct of_device_id mma8452_dt_ids[] = { |
244a93f6 | 1423 | { .compatible = "fsl,mma8451", .data = &mma_chip_info_table[mma8451] }, |
c3cdd6e4 | 1424 | { .compatible = "fsl,mma8452", .data = &mma_chip_info_table[mma8452] }, |
c5ea1b58 | 1425 | { .compatible = "fsl,mma8453", .data = &mma_chip_info_table[mma8453] }, |
417e008b MK |
1426 | { .compatible = "fsl,mma8652", .data = &mma_chip_info_table[mma8652] }, |
1427 | { .compatible = "fsl,mma8653", .data = &mma_chip_info_table[mma8653] }, | |
e8731180 | 1428 | { .compatible = "fsl,fxls8471", .data = &mma_chip_info_table[fxls8471] }, |
c3cdd6e4 MK |
1429 | { } |
1430 | }; | |
1431 | MODULE_DEVICE_TABLE(of, mma8452_dt_ids); | |
1432 | ||
c7eeea93 PM |
1433 | static int mma8452_probe(struct i2c_client *client, |
1434 | const struct i2c_device_id *id) | |
1435 | { | |
1436 | struct mma8452_data *data; | |
1437 | struct iio_dev *indio_dev; | |
1438 | int ret; | |
c3cdd6e4 | 1439 | const struct of_device_id *match; |
c7eeea93 | 1440 | |
c3cdd6e4 MK |
1441 | match = of_match_device(mma8452_dt_ids, &client->dev); |
1442 | if (!match) { | |
1443 | dev_err(&client->dev, "unknown device model\n"); | |
1444 | return -ENODEV; | |
1445 | } | |
1446 | ||
c7eeea93 PM |
1447 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
1448 | if (!indio_dev) | |
1449 | return -ENOMEM; | |
1450 | ||
1451 | data = iio_priv(indio_dev); | |
1452 | data->client = client; | |
1453 | mutex_init(&data->lock); | |
c3cdd6e4 MK |
1454 | data->chip_info = match->data; |
1455 | ||
417e008b MK |
1456 | ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I); |
1457 | if (ret < 0) | |
1458 | return ret; | |
1459 | ||
1460 | switch (ret) { | |
244a93f6 | 1461 | case MMA8451_DEVICE_ID: |
417e008b MK |
1462 | case MMA8452_DEVICE_ID: |
1463 | case MMA8453_DEVICE_ID: | |
1464 | case MMA8652_DEVICE_ID: | |
1465 | case MMA8653_DEVICE_ID: | |
e8731180 | 1466 | case FXLS8471_DEVICE_ID: |
417e008b MK |
1467 | if (ret == data->chip_info->chip_id) |
1468 | break; | |
1469 | default: | |
1470 | return -ENODEV; | |
1471 | } | |
1472 | ||
c3cdd6e4 MK |
1473 | dev_info(&client->dev, "registering %s accelerometer; ID 0x%x\n", |
1474 | match->compatible, data->chip_info->chip_id); | |
c7eeea93 PM |
1475 | |
1476 | i2c_set_clientdata(client, indio_dev); | |
1477 | indio_dev->info = &mma8452_info; | |
1478 | indio_dev->name = id->name; | |
1479 | indio_dev->dev.parent = &client->dev; | |
1480 | indio_dev->modes = INDIO_DIRECT_MODE; | |
c3cdd6e4 MK |
1481 | indio_dev->channels = data->chip_info->channels; |
1482 | indio_dev->num_channels = data->chip_info->num_channels; | |
c7eeea93 PM |
1483 | indio_dev->available_scan_masks = mma8452_scan_masks; |
1484 | ||
ecabae71 | 1485 | ret = mma8452_reset(client); |
c7eeea93 PM |
1486 | if (ret < 0) |
1487 | return ret; | |
1488 | ||
1489 | data->data_cfg = MMA8452_DATA_CFG_FS_2G; | |
1490 | ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG, | |
686027fb | 1491 | data->data_cfg); |
c7eeea93 PM |
1492 | if (ret < 0) |
1493 | return ret; | |
1494 | ||
28e34278 MF |
1495 | /* |
1496 | * By default set transient threshold to max to avoid events if | |
1497 | * enabling without configuring threshold. | |
1498 | */ | |
1499 | ret = i2c_smbus_write_byte_data(client, MMA8452_TRANSIENT_THS, | |
1500 | MMA8452_TRANSIENT_THS_MASK); | |
1501 | if (ret < 0) | |
1502 | return ret; | |
1503 | ||
1504 | if (client->irq) { | |
1505 | /* | |
60f562e7 MK |
1506 | * Although we enable the interrupt sources once and for |
1507 | * all here the event detection itself is not enabled until | |
1508 | * userspace asks for it by mma8452_write_event_config() | |
28e34278 | 1509 | */ |
60f562e7 MK |
1510 | int supported_interrupts = MMA8452_INT_DRDY | |
1511 | MMA8452_INT_TRANS | | |
1512 | MMA8452_INT_FF_MT; | |
1513 | int enabled_interrupts = MMA8452_INT_TRANS | | |
1514 | MMA8452_INT_FF_MT; | |
d2a3e093 | 1515 | int irq2; |
28e34278 | 1516 | |
d2a3e093 MK |
1517 | irq2 = of_irq_get_byname(client->dev.of_node, "INT2"); |
1518 | ||
1519 | if (irq2 == client->irq) { | |
1520 | dev_dbg(&client->dev, "using interrupt line INT2\n"); | |
1521 | } else { | |
1522 | ret = i2c_smbus_write_byte_data(client, | |
1523 | MMA8452_CTRL_REG5, | |
1524 | supported_interrupts); | |
1525 | if (ret < 0) | |
1526 | return ret; | |
1527 | ||
1528 | dev_dbg(&client->dev, "using interrupt line INT1\n"); | |
1529 | } | |
28e34278 MF |
1530 | |
1531 | ret = i2c_smbus_write_byte_data(client, | |
1532 | MMA8452_CTRL_REG4, | |
ae6d9ce0 MF |
1533 | enabled_interrupts); |
1534 | if (ret < 0) | |
1535 | return ret; | |
1536 | ||
1537 | ret = mma8452_trigger_setup(indio_dev); | |
28e34278 MF |
1538 | if (ret < 0) |
1539 | return ret; | |
1540 | } | |
1541 | ||
ecabae71 | 1542 | data->ctrl_reg1 = MMA8452_CTRL_ACTIVE | |
686027fb | 1543 | (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT); |
ecabae71 MF |
1544 | ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1, |
1545 | data->ctrl_reg1); | |
1546 | if (ret < 0) | |
ae6d9ce0 | 1547 | goto trigger_cleanup; |
ecabae71 | 1548 | |
c7eeea93 | 1549 | ret = iio_triggered_buffer_setup(indio_dev, NULL, |
686027fb | 1550 | mma8452_trigger_handler, NULL); |
c7eeea93 | 1551 | if (ret < 0) |
ae6d9ce0 | 1552 | goto trigger_cleanup; |
c7eeea93 | 1553 | |
28e34278 MF |
1554 | if (client->irq) { |
1555 | ret = devm_request_threaded_irq(&client->dev, | |
1556 | client->irq, | |
1557 | NULL, mma8452_interrupt, | |
1558 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1559 | client->name, indio_dev); | |
1560 | if (ret) | |
1561 | goto buffer_cleanup; | |
1562 | } | |
1563 | ||
96c0cb2b MK |
1564 | ret = pm_runtime_set_active(&client->dev); |
1565 | if (ret < 0) | |
1566 | goto buffer_cleanup; | |
1567 | ||
1568 | pm_runtime_enable(&client->dev); | |
1569 | pm_runtime_set_autosuspend_delay(&client->dev, | |
1570 | MMA8452_AUTO_SUSPEND_DELAY_MS); | |
1571 | pm_runtime_use_autosuspend(&client->dev); | |
1572 | ||
c7eeea93 PM |
1573 | ret = iio_device_register(indio_dev); |
1574 | if (ret < 0) | |
1575 | goto buffer_cleanup; | |
28e34278 | 1576 | |
4b04266a | 1577 | ret = mma8452_set_freefall_mode(data, false); |
1a965d40 BT |
1578 | if (ret < 0) |
1579 | goto buffer_cleanup; | |
4b04266a | 1580 | |
c7eeea93 PM |
1581 | return 0; |
1582 | ||
1583 | buffer_cleanup: | |
1584 | iio_triggered_buffer_cleanup(indio_dev); | |
ae6d9ce0 MF |
1585 | |
1586 | trigger_cleanup: | |
1587 | mma8452_trigger_cleanup(indio_dev); | |
1588 | ||
c7eeea93 PM |
1589 | return ret; |
1590 | } | |
1591 | ||
1592 | static int mma8452_remove(struct i2c_client *client) | |
1593 | { | |
1594 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
1595 | ||
1596 | iio_device_unregister(indio_dev); | |
96c0cb2b MK |
1597 | |
1598 | pm_runtime_disable(&client->dev); | |
1599 | pm_runtime_set_suspended(&client->dev); | |
1600 | pm_runtime_put_noidle(&client->dev); | |
1601 | ||
c7eeea93 | 1602 | iio_triggered_buffer_cleanup(indio_dev); |
ae6d9ce0 | 1603 | mma8452_trigger_cleanup(indio_dev); |
c7eeea93 PM |
1604 | mma8452_standby(iio_priv(indio_dev)); |
1605 | ||
1606 | return 0; | |
1607 | } | |
1608 | ||
96c0cb2b MK |
1609 | #ifdef CONFIG_PM |
1610 | static int mma8452_runtime_suspend(struct device *dev) | |
1611 | { | |
1612 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1613 | struct mma8452_data *data = iio_priv(indio_dev); | |
1614 | int ret; | |
1615 | ||
1616 | mutex_lock(&data->lock); | |
1617 | ret = mma8452_standby(data); | |
1618 | mutex_unlock(&data->lock); | |
1619 | if (ret < 0) { | |
1620 | dev_err(&data->client->dev, "powering off device failed\n"); | |
1621 | return -EAGAIN; | |
1622 | } | |
1623 | ||
1624 | return 0; | |
1625 | } | |
1626 | ||
1627 | static int mma8452_runtime_resume(struct device *dev) | |
1628 | { | |
1629 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); | |
1630 | struct mma8452_data *data = iio_priv(indio_dev); | |
1631 | int ret, sleep_val; | |
1632 | ||
1633 | ret = mma8452_active(data); | |
1634 | if (ret < 0) | |
1635 | return ret; | |
1636 | ||
1637 | ret = mma8452_get_odr_index(data); | |
1638 | sleep_val = 1000 / mma8452_samp_freq[ret][0]; | |
1639 | if (sleep_val < 20) | |
1640 | usleep_range(sleep_val * 1000, 20000); | |
1641 | else | |
1642 | msleep_interruptible(sleep_val); | |
1643 | ||
1644 | return 0; | |
1645 | } | |
1646 | #endif | |
1647 | ||
c7eeea93 PM |
1648 | #ifdef CONFIG_PM_SLEEP |
1649 | static int mma8452_suspend(struct device *dev) | |
1650 | { | |
1651 | return mma8452_standby(iio_priv(i2c_get_clientdata( | |
1652 | to_i2c_client(dev)))); | |
1653 | } | |
1654 | ||
1655 | static int mma8452_resume(struct device *dev) | |
1656 | { | |
1657 | return mma8452_active(iio_priv(i2c_get_clientdata( | |
1658 | to_i2c_client(dev)))); | |
1659 | } | |
c7eeea93 PM |
1660 | #endif |
1661 | ||
96c0cb2b MK |
1662 | static const struct dev_pm_ops mma8452_pm_ops = { |
1663 | SET_SYSTEM_SLEEP_PM_OPS(mma8452_suspend, mma8452_resume) | |
1664 | SET_RUNTIME_PM_OPS(mma8452_runtime_suspend, | |
1665 | mma8452_runtime_resume, NULL) | |
1666 | }; | |
1667 | ||
c7eeea93 | 1668 | static const struct i2c_device_id mma8452_id[] = { |
ddb851af | 1669 | { "mma8451", mma8451 }, |
c3cdd6e4 | 1670 | { "mma8452", mma8452 }, |
c5ea1b58 | 1671 | { "mma8453", mma8453 }, |
417e008b MK |
1672 | { "mma8652", mma8652 }, |
1673 | { "mma8653", mma8653 }, | |
e8731180 | 1674 | { "fxls8471", fxls8471 }, |
c7eeea93 PM |
1675 | { } |
1676 | }; | |
1677 | MODULE_DEVICE_TABLE(i2c, mma8452_id); | |
1678 | ||
1679 | static struct i2c_driver mma8452_driver = { | |
1680 | .driver = { | |
1681 | .name = "mma8452", | |
a3fb96a8 | 1682 | .of_match_table = of_match_ptr(mma8452_dt_ids), |
96c0cb2b | 1683 | .pm = &mma8452_pm_ops, |
c7eeea93 PM |
1684 | }, |
1685 | .probe = mma8452_probe, | |
1686 | .remove = mma8452_remove, | |
1687 | .id_table = mma8452_id, | |
1688 | }; | |
1689 | module_i2c_driver(mma8452_driver); | |
1690 | ||
1691 | MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>"); | |
f26ab1aa | 1692 | MODULE_DESCRIPTION("Freescale / NXP MMA8452 accelerometer driver"); |
c7eeea93 | 1693 | MODULE_LICENSE("GPL"); |