Commit | Line | Data |
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45fe6f7d | 1 | /* |
2 | * HID Sensors Driver | |
3 | * Copyright (c) 2012, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | */ | |
19 | #include <linux/device.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/irq.h> | |
24 | #include <linux/slab.h> | |
c6399453 | 25 | #include <linux/delay.h> |
45fe6f7d | 26 | #include <linux/hid-sensor-hub.h> |
27 | #include <linux/iio/iio.h> | |
28 | #include <linux/iio/sysfs.h> | |
29 | #include <linux/iio/buffer.h> | |
30 | #include <linux/iio/trigger_consumer.h> | |
31 | #include <linux/iio/triggered_buffer.h> | |
45fe6f7d | 32 | #include "../common/hid-sensors/hid-sensor-trigger.h" |
33 | ||
45fe6f7d | 34 | enum accel_3d_channel { |
35 | CHANNEL_SCAN_INDEX_X, | |
36 | CHANNEL_SCAN_INDEX_Y, | |
37 | CHANNEL_SCAN_INDEX_Z, | |
38 | ACCEL_3D_CHANNEL_MAX, | |
39 | }; | |
40 | ||
41 | struct accel_3d_state { | |
42 | struct hid_sensor_hub_callbacks callbacks; | |
e07c6d17 | 43 | struct hid_sensor_common common_attributes; |
45fe6f7d | 44 | struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX]; |
45 | u32 accel_val[ACCEL_3D_CHANNEL_MAX]; | |
73a24988 SP |
46 | int scale_pre_decml; |
47 | int scale_post_decml; | |
48 | int scale_precision; | |
49 | int value_offset; | |
45fe6f7d | 50 | }; |
51 | ||
52 | static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = { | |
53 | HID_USAGE_SENSOR_ACCEL_X_AXIS, | |
54 | HID_USAGE_SENSOR_ACCEL_Y_AXIS, | |
55 | HID_USAGE_SENSOR_ACCEL_Z_AXIS | |
56 | }; | |
57 | ||
58 | /* Channel definitions */ | |
59 | static const struct iio_chan_spec accel_3d_channels[] = { | |
60 | { | |
61 | .type = IIO_ACCEL, | |
62 | .modified = 1, | |
63 | .channel2 = IIO_MOD_X, | |
c6399453 | 64 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
ecbe18f2 JC |
65 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
66 | BIT(IIO_CHAN_INFO_SCALE) | | |
67 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
68 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
45fe6f7d | 69 | .scan_index = CHANNEL_SCAN_INDEX_X, |
70 | }, { | |
71 | .type = IIO_ACCEL, | |
72 | .modified = 1, | |
73 | .channel2 = IIO_MOD_Y, | |
c6399453 | 74 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
ecbe18f2 JC |
75 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
76 | BIT(IIO_CHAN_INFO_SCALE) | | |
77 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
78 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
45fe6f7d | 79 | .scan_index = CHANNEL_SCAN_INDEX_Y, |
80 | }, { | |
81 | .type = IIO_ACCEL, | |
82 | .modified = 1, | |
83 | .channel2 = IIO_MOD_Z, | |
c6399453 | 84 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
ecbe18f2 JC |
85 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
86 | BIT(IIO_CHAN_INFO_SCALE) | | |
87 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
88 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
45fe6f7d | 89 | .scan_index = CHANNEL_SCAN_INDEX_Z, |
90 | } | |
91 | }; | |
92 | ||
93 | /* Adjust channel real bits based on report descriptor */ | |
94 | static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, | |
95 | int channel, int size) | |
96 | { | |
97 | channels[channel].scan_type.sign = 's'; | |
98 | /* Real storage bits will change based on the report desc. */ | |
99 | channels[channel].scan_type.realbits = size * 8; | |
100 | /* Maximum size of a sample to capture is u32 */ | |
101 | channels[channel].scan_type.storagebits = sizeof(u32) * 8; | |
102 | } | |
103 | ||
104 | /* Channel read_raw handler */ | |
105 | static int accel_3d_read_raw(struct iio_dev *indio_dev, | |
106 | struct iio_chan_spec const *chan, | |
107 | int *val, int *val2, | |
108 | long mask) | |
109 | { | |
110 | struct accel_3d_state *accel_state = iio_priv(indio_dev); | |
111 | int report_id = -1; | |
112 | u32 address; | |
45fe6f7d | 113 | int ret_type; |
114 | ||
115 | *val = 0; | |
116 | *val2 = 0; | |
117 | switch (mask) { | |
118 | case 0: | |
c6399453 | 119 | hid_sensor_power_state(&accel_state->common_attributes, true); |
45fe6f7d | 120 | report_id = accel_state->accel[chan->scan_index].report_id; |
121 | address = accel_3d_addresses[chan->scan_index]; | |
122 | if (report_id >= 0) | |
123 | *val = sensor_hub_input_attr_get_raw_value( | |
c6399453 SP |
124 | accel_state->common_attributes.hsdev, |
125 | HID_USAGE_SENSOR_ACCEL_3D, address, | |
b3f4737d SP |
126 | report_id, |
127 | SENSOR_HUB_SYNC); | |
45fe6f7d | 128 | else { |
129 | *val = 0; | |
c6399453 SP |
130 | hid_sensor_power_state(&accel_state->common_attributes, |
131 | false); | |
45fe6f7d | 132 | return -EINVAL; |
133 | } | |
c6399453 | 134 | hid_sensor_power_state(&accel_state->common_attributes, false); |
45fe6f7d | 135 | ret_type = IIO_VAL_INT; |
136 | break; | |
137 | case IIO_CHAN_INFO_SCALE: | |
73a24988 SP |
138 | *val = accel_state->scale_pre_decml; |
139 | *val2 = accel_state->scale_post_decml; | |
140 | ret_type = accel_state->scale_precision; | |
45fe6f7d | 141 | break; |
142 | case IIO_CHAN_INFO_OFFSET: | |
73a24988 | 143 | *val = accel_state->value_offset; |
45fe6f7d | 144 | ret_type = IIO_VAL_INT; |
145 | break; | |
146 | case IIO_CHAN_INFO_SAMP_FREQ: | |
2f084c17 | 147 | ret_type = hid_sensor_read_samp_freq_value( |
45fe6f7d | 148 | &accel_state->common_attributes, val, val2); |
45fe6f7d | 149 | break; |
150 | case IIO_CHAN_INFO_HYSTERESIS: | |
2f084c17 | 151 | ret_type = hid_sensor_read_raw_hyst_value( |
45fe6f7d | 152 | &accel_state->common_attributes, val, val2); |
45fe6f7d | 153 | break; |
154 | default: | |
155 | ret_type = -EINVAL; | |
156 | break; | |
157 | } | |
158 | ||
159 | return ret_type; | |
160 | } | |
161 | ||
162 | /* Channel write_raw handler */ | |
163 | static int accel_3d_write_raw(struct iio_dev *indio_dev, | |
164 | struct iio_chan_spec const *chan, | |
165 | int val, | |
166 | int val2, | |
167 | long mask) | |
168 | { | |
169 | struct accel_3d_state *accel_state = iio_priv(indio_dev); | |
170 | int ret = 0; | |
171 | ||
172 | switch (mask) { | |
173 | case IIO_CHAN_INFO_SAMP_FREQ: | |
174 | ret = hid_sensor_write_samp_freq_value( | |
175 | &accel_state->common_attributes, val, val2); | |
176 | break; | |
177 | case IIO_CHAN_INFO_HYSTERESIS: | |
178 | ret = hid_sensor_write_raw_hyst_value( | |
179 | &accel_state->common_attributes, val, val2); | |
180 | break; | |
181 | default: | |
182 | ret = -EINVAL; | |
183 | } | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
45fe6f7d | 188 | static const struct iio_info accel_3d_info = { |
189 | .driver_module = THIS_MODULE, | |
190 | .read_raw = &accel_3d_read_raw, | |
191 | .write_raw = &accel_3d_write_raw, | |
45fe6f7d | 192 | }; |
193 | ||
194 | /* Function to push data to buffer */ | |
8c60c7e7 LPC |
195 | static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data, |
196 | int len) | |
45fe6f7d | 197 | { |
45fe6f7d | 198 | dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); |
8c60c7e7 | 199 | iio_push_to_buffers(indio_dev, data); |
45fe6f7d | 200 | } |
201 | ||
202 | /* Callback handler to send event after all samples are received and captured */ | |
203 | static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev, | |
204 | unsigned usage_id, | |
205 | void *priv) | |
206 | { | |
207 | struct iio_dev *indio_dev = platform_get_drvdata(priv); | |
208 | struct accel_3d_state *accel_state = iio_priv(indio_dev); | |
209 | ||
56ff6be6 SP |
210 | dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n"); |
211 | if (atomic_read(&accel_state->common_attributes.data_ready)) | |
45fe6f7d | 212 | hid_sensor_push_data(indio_dev, |
8c60c7e7 | 213 | accel_state->accel_val, |
45fe6f7d | 214 | sizeof(accel_state->accel_val)); |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | /* Capture samples in local storage */ | |
220 | static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev, | |
221 | unsigned usage_id, | |
222 | size_t raw_len, char *raw_data, | |
223 | void *priv) | |
224 | { | |
225 | struct iio_dev *indio_dev = platform_get_drvdata(priv); | |
226 | struct accel_3d_state *accel_state = iio_priv(indio_dev); | |
227 | int offset; | |
228 | int ret = -EINVAL; | |
229 | ||
230 | switch (usage_id) { | |
231 | case HID_USAGE_SENSOR_ACCEL_X_AXIS: | |
232 | case HID_USAGE_SENSOR_ACCEL_Y_AXIS: | |
233 | case HID_USAGE_SENSOR_ACCEL_Z_AXIS: | |
234 | offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS; | |
235 | accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] = | |
236 | *(u32 *)raw_data; | |
237 | ret = 0; | |
238 | break; | |
239 | default: | |
240 | break; | |
241 | } | |
242 | ||
243 | return ret; | |
244 | } | |
245 | ||
246 | /* Parse report which is specific to an usage id*/ | |
247 | static int accel_3d_parse_report(struct platform_device *pdev, | |
248 | struct hid_sensor_hub_device *hsdev, | |
249 | struct iio_chan_spec *channels, | |
250 | unsigned usage_id, | |
251 | struct accel_3d_state *st) | |
252 | { | |
253 | int ret; | |
254 | int i; | |
255 | ||
256 | for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { | |
257 | ret = sensor_hub_input_get_attribute_info(hsdev, | |
258 | HID_INPUT_REPORT, | |
259 | usage_id, | |
260 | HID_USAGE_SENSOR_ACCEL_X_AXIS + i, | |
261 | &st->accel[CHANNEL_SCAN_INDEX_X + i]); | |
262 | if (ret < 0) | |
263 | break; | |
264 | accel_3d_adjust_channel_bit_mask(channels, | |
265 | CHANNEL_SCAN_INDEX_X + i, | |
266 | st->accel[CHANNEL_SCAN_INDEX_X + i].size); | |
267 | } | |
268 | dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n", | |
269 | st->accel[0].index, | |
270 | st->accel[0].report_id, | |
271 | st->accel[1].index, st->accel[1].report_id, | |
272 | st->accel[2].index, st->accel[2].report_id); | |
273 | ||
73a24988 SP |
274 | st->scale_precision = hid_sensor_format_scale( |
275 | HID_USAGE_SENSOR_ACCEL_3D, | |
276 | &st->accel[CHANNEL_SCAN_INDEX_X], | |
277 | &st->scale_pre_decml, &st->scale_post_decml); | |
278 | ||
64528d03 SP |
279 | /* Set Sensitivity field ids, when there is no individual modifier */ |
280 | if (st->common_attributes.sensitivity.index < 0) { | |
281 | sensor_hub_input_get_attribute_info(hsdev, | |
282 | HID_FEATURE_REPORT, usage_id, | |
283 | HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS | | |
284 | HID_USAGE_SENSOR_DATA_ACCELERATION, | |
285 | &st->common_attributes.sensitivity); | |
286 | dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n", | |
287 | st->common_attributes.sensitivity.index, | |
288 | st->common_attributes.sensitivity.report_id); | |
289 | } | |
290 | ||
45fe6f7d | 291 | return ret; |
292 | } | |
293 | ||
294 | /* Function to initialize the processing for usage id */ | |
fc52692c | 295 | static int hid_accel_3d_probe(struct platform_device *pdev) |
45fe6f7d | 296 | { |
297 | int ret = 0; | |
298 | static const char *name = "accel_3d"; | |
299 | struct iio_dev *indio_dev; | |
300 | struct accel_3d_state *accel_state; | |
301 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; | |
45fe6f7d | 302 | |
6b545eed SK |
303 | indio_dev = devm_iio_device_alloc(&pdev->dev, |
304 | sizeof(struct accel_3d_state)); | |
305 | if (indio_dev == NULL) | |
306 | return -ENOMEM; | |
307 | ||
45fe6f7d | 308 | platform_set_drvdata(pdev, indio_dev); |
309 | ||
310 | accel_state = iio_priv(indio_dev); | |
311 | accel_state->common_attributes.hsdev = hsdev; | |
312 | accel_state->common_attributes.pdev = pdev; | |
313 | ||
314 | ret = hid_sensor_parse_common_attributes(hsdev, | |
315 | HID_USAGE_SENSOR_ACCEL_3D, | |
316 | &accel_state->common_attributes); | |
317 | if (ret) { | |
318 | dev_err(&pdev->dev, "failed to setup common attributes\n"); | |
6b545eed | 319 | return ret; |
45fe6f7d | 320 | } |
321 | ||
b136faff FE |
322 | indio_dev->channels = kmemdup(accel_3d_channels, |
323 | sizeof(accel_3d_channels), GFP_KERNEL); | |
324 | if (!indio_dev->channels) { | |
45fe6f7d | 325 | dev_err(&pdev->dev, "failed to duplicate channels\n"); |
6b545eed | 326 | return -ENOMEM; |
45fe6f7d | 327 | } |
328 | ||
b136faff FE |
329 | ret = accel_3d_parse_report(pdev, hsdev, |
330 | (struct iio_chan_spec *)indio_dev->channels, | |
331 | HID_USAGE_SENSOR_ACCEL_3D, accel_state); | |
45fe6f7d | 332 | if (ret) { |
333 | dev_err(&pdev->dev, "failed to setup attributes\n"); | |
334 | goto error_free_dev_mem; | |
335 | } | |
336 | ||
45fe6f7d | 337 | indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels); |
338 | indio_dev->dev.parent = &pdev->dev; | |
339 | indio_dev->info = &accel_3d_info; | |
340 | indio_dev->name = name; | |
341 | indio_dev->modes = INDIO_DIRECT_MODE; | |
342 | ||
343 | ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, | |
344 | NULL, NULL); | |
345 | if (ret) { | |
346 | dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); | |
347 | goto error_free_dev_mem; | |
348 | } | |
56ff6be6 | 349 | atomic_set(&accel_state->common_attributes.data_ready, 0); |
45fe6f7d | 350 | ret = hid_sensor_setup_trigger(indio_dev, name, |
351 | &accel_state->common_attributes); | |
352 | if (ret < 0) { | |
353 | dev_err(&pdev->dev, "trigger setup failed\n"); | |
354 | goto error_unreg_buffer_funcs; | |
355 | } | |
356 | ||
357 | ret = iio_device_register(indio_dev); | |
358 | if (ret) { | |
359 | dev_err(&pdev->dev, "device register failed\n"); | |
360 | goto error_remove_trigger; | |
361 | } | |
362 | ||
363 | accel_state->callbacks.send_event = accel_3d_proc_event; | |
364 | accel_state->callbacks.capture_sample = accel_3d_capture_sample; | |
365 | accel_state->callbacks.pdev = pdev; | |
366 | ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D, | |
367 | &accel_state->callbacks); | |
368 | if (ret < 0) { | |
369 | dev_err(&pdev->dev, "callback reg failed\n"); | |
370 | goto error_iio_unreg; | |
371 | } | |
372 | ||
373 | return ret; | |
374 | ||
375 | error_iio_unreg: | |
376 | iio_device_unregister(indio_dev); | |
377 | error_remove_trigger: | |
ec7f68e0 | 378 | hid_sensor_remove_trigger(&accel_state->common_attributes); |
45fe6f7d | 379 | error_unreg_buffer_funcs: |
380 | iio_triggered_buffer_cleanup(indio_dev); | |
381 | error_free_dev_mem: | |
382 | kfree(indio_dev->channels); | |
45fe6f7d | 383 | return ret; |
384 | } | |
385 | ||
386 | /* Function to deinitialize the processing for usage id */ | |
fc52692c | 387 | static int hid_accel_3d_remove(struct platform_device *pdev) |
45fe6f7d | 388 | { |
389 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; | |
390 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); | |
ec7f68e0 | 391 | struct accel_3d_state *accel_state = iio_priv(indio_dev); |
45fe6f7d | 392 | |
393 | sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D); | |
394 | iio_device_unregister(indio_dev); | |
ec7f68e0 | 395 | hid_sensor_remove_trigger(&accel_state->common_attributes); |
45fe6f7d | 396 | iio_triggered_buffer_cleanup(indio_dev); |
397 | kfree(indio_dev->channels); | |
45fe6f7d | 398 | |
399 | return 0; | |
400 | } | |
401 | ||
76ec50a1 | 402 | static const struct platform_device_id hid_accel_3d_ids[] = { |
66c721f7 AH |
403 | { |
404 | /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ | |
405 | .name = "HID-SENSOR-200073", | |
406 | }, | |
407 | { /* sentinel */ } | |
408 | }; | |
409 | MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids); | |
410 | ||
45fe6f7d | 411 | static struct platform_driver hid_accel_3d_platform_driver = { |
66c721f7 | 412 | .id_table = hid_accel_3d_ids, |
45fe6f7d | 413 | .driver = { |
66c721f7 | 414 | .name = KBUILD_MODNAME, |
cbbcc937 | 415 | .pm = &hid_sensor_pm_ops, |
45fe6f7d | 416 | }, |
417 | .probe = hid_accel_3d_probe, | |
418 | .remove = hid_accel_3d_remove, | |
419 | }; | |
420 | module_platform_driver(hid_accel_3d_platform_driver); | |
421 | ||
422 | MODULE_DESCRIPTION("HID Sensor Accel 3D"); | |
423 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); | |
424 | MODULE_LICENSE("GPL"); |