Commit | Line | Data |
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c5bdbef7 | 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> | |
25 | #include <linux/hid-sensor-hub.h> | |
26 | #include <linux/iio/iio.h> | |
27 | #include <linux/iio/sysfs.h> | |
28 | #include <linux/iio/buffer.h> | |
29 | #include <linux/iio/trigger_consumer.h> | |
30 | #include <linux/iio/triggered_buffer.h> | |
c5bdbef7 | 31 | #include "../common/hid-sensors/hid-sensor-trigger.h" |
32 | ||
c5bdbef7 | 33 | enum gyro_3d_channel { |
34 | CHANNEL_SCAN_INDEX_X, | |
35 | CHANNEL_SCAN_INDEX_Y, | |
36 | CHANNEL_SCAN_INDEX_Z, | |
37 | GYRO_3D_CHANNEL_MAX, | |
38 | }; | |
39 | ||
40 | struct gyro_3d_state { | |
41 | struct hid_sensor_hub_callbacks callbacks; | |
e07c6d17 | 42 | struct hid_sensor_common common_attributes; |
c5bdbef7 | 43 | struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX]; |
44 | u32 gyro_val[GYRO_3D_CHANNEL_MAX]; | |
45 | }; | |
46 | ||
47 | static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = { | |
48 | HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS, | |
49 | HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS, | |
50 | HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS | |
51 | }; | |
52 | ||
53 | /* Channel definitions */ | |
54 | static const struct iio_chan_spec gyro_3d_channels[] = { | |
55 | { | |
56 | .type = IIO_ANGL_VEL, | |
57 | .modified = 1, | |
58 | .channel2 = IIO_MOD_X, | |
ecbe18f2 JC |
59 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
60 | BIT(IIO_CHAN_INFO_SCALE) | | |
61 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
62 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
c5bdbef7 | 63 | .scan_index = CHANNEL_SCAN_INDEX_X, |
64 | }, { | |
65 | .type = IIO_ANGL_VEL, | |
66 | .modified = 1, | |
67 | .channel2 = IIO_MOD_Y, | |
ecbe18f2 JC |
68 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
69 | BIT(IIO_CHAN_INFO_SCALE) | | |
70 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
71 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
c5bdbef7 | 72 | .scan_index = CHANNEL_SCAN_INDEX_Y, |
73 | }, { | |
74 | .type = IIO_ANGL_VEL, | |
75 | .modified = 1, | |
76 | .channel2 = IIO_MOD_Z, | |
ecbe18f2 JC |
77 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
78 | BIT(IIO_CHAN_INFO_SCALE) | | |
79 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | | |
80 | BIT(IIO_CHAN_INFO_HYSTERESIS), | |
c5bdbef7 | 81 | .scan_index = CHANNEL_SCAN_INDEX_Z, |
82 | } | |
83 | }; | |
84 | ||
85 | /* Adjust channel real bits based on report descriptor */ | |
86 | static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, | |
87 | int channel, int size) | |
88 | { | |
89 | channels[channel].scan_type.sign = 's'; | |
90 | /* Real storage bits will change based on the report desc. */ | |
91 | channels[channel].scan_type.realbits = size * 8; | |
92 | /* Maximum size of a sample to capture is u32 */ | |
93 | channels[channel].scan_type.storagebits = sizeof(u32) * 8; | |
94 | } | |
95 | ||
96 | /* Channel read_raw handler */ | |
97 | static int gyro_3d_read_raw(struct iio_dev *indio_dev, | |
98 | struct iio_chan_spec const *chan, | |
99 | int *val, int *val2, | |
100 | long mask) | |
101 | { | |
102 | struct gyro_3d_state *gyro_state = iio_priv(indio_dev); | |
103 | int report_id = -1; | |
104 | u32 address; | |
105 | int ret; | |
106 | int ret_type; | |
107 | ||
108 | *val = 0; | |
109 | *val2 = 0; | |
110 | switch (mask) { | |
111 | case 0: | |
112 | report_id = gyro_state->gyro[chan->scan_index].report_id; | |
113 | address = gyro_3d_addresses[chan->scan_index]; | |
114 | if (report_id >= 0) | |
115 | *val = sensor_hub_input_attr_get_raw_value( | |
116 | gyro_state->common_attributes.hsdev, | |
117 | HID_USAGE_SENSOR_GYRO_3D, address, | |
118 | report_id); | |
119 | else { | |
120 | *val = 0; | |
121 | return -EINVAL; | |
122 | } | |
123 | ret_type = IIO_VAL_INT; | |
124 | break; | |
125 | case IIO_CHAN_INFO_SCALE: | |
126 | *val = gyro_state->gyro[CHANNEL_SCAN_INDEX_X].units; | |
127 | ret_type = IIO_VAL_INT; | |
128 | break; | |
129 | case IIO_CHAN_INFO_OFFSET: | |
130 | *val = hid_sensor_convert_exponent( | |
131 | gyro_state->gyro[CHANNEL_SCAN_INDEX_X].unit_expo); | |
132 | ret_type = IIO_VAL_INT; | |
133 | break; | |
134 | case IIO_CHAN_INFO_SAMP_FREQ: | |
135 | ret = hid_sensor_read_samp_freq_value( | |
136 | &gyro_state->common_attributes, val, val2); | |
137 | ret_type = IIO_VAL_INT_PLUS_MICRO; | |
138 | break; | |
139 | case IIO_CHAN_INFO_HYSTERESIS: | |
140 | ret = hid_sensor_read_raw_hyst_value( | |
141 | &gyro_state->common_attributes, val, val2); | |
142 | ret_type = IIO_VAL_INT_PLUS_MICRO; | |
143 | break; | |
144 | default: | |
145 | ret_type = -EINVAL; | |
146 | break; | |
147 | } | |
148 | ||
149 | return ret_type; | |
150 | } | |
151 | ||
152 | /* Channel write_raw handler */ | |
153 | static int gyro_3d_write_raw(struct iio_dev *indio_dev, | |
154 | struct iio_chan_spec const *chan, | |
155 | int val, | |
156 | int val2, | |
157 | long mask) | |
158 | { | |
159 | struct gyro_3d_state *gyro_state = iio_priv(indio_dev); | |
160 | int ret = 0; | |
161 | ||
162 | switch (mask) { | |
163 | case IIO_CHAN_INFO_SAMP_FREQ: | |
164 | ret = hid_sensor_write_samp_freq_value( | |
165 | &gyro_state->common_attributes, val, val2); | |
166 | break; | |
167 | case IIO_CHAN_INFO_HYSTERESIS: | |
168 | ret = hid_sensor_write_raw_hyst_value( | |
169 | &gyro_state->common_attributes, val, val2); | |
170 | break; | |
171 | default: | |
172 | ret = -EINVAL; | |
173 | } | |
174 | ||
175 | return ret; | |
176 | } | |
177 | ||
c5bdbef7 | 178 | static const struct iio_info gyro_3d_info = { |
179 | .driver_module = THIS_MODULE, | |
180 | .read_raw = &gyro_3d_read_raw, | |
181 | .write_raw = &gyro_3d_write_raw, | |
c5bdbef7 | 182 | }; |
183 | ||
184 | /* Function to push data to buffer */ | |
8c60c7e7 LPC |
185 | static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data, |
186 | int len) | |
c5bdbef7 | 187 | { |
c5bdbef7 | 188 | dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); |
8c60c7e7 | 189 | iio_push_to_buffers(indio_dev, data); |
c5bdbef7 | 190 | } |
191 | ||
192 | /* Callback handler to send event after all samples are received and captured */ | |
193 | static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev, | |
194 | unsigned usage_id, | |
195 | void *priv) | |
196 | { | |
197 | struct iio_dev *indio_dev = platform_get_drvdata(priv); | |
198 | struct gyro_3d_state *gyro_state = iio_priv(indio_dev); | |
199 | ||
200 | dev_dbg(&indio_dev->dev, "gyro_3d_proc_event [%d]\n", | |
201 | gyro_state->common_attributes.data_ready); | |
202 | if (gyro_state->common_attributes.data_ready) | |
203 | hid_sensor_push_data(indio_dev, | |
8c60c7e7 | 204 | gyro_state->gyro_val, |
c5bdbef7 | 205 | sizeof(gyro_state->gyro_val)); |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | /* Capture samples in local storage */ | |
211 | static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev, | |
212 | unsigned usage_id, | |
213 | size_t raw_len, char *raw_data, | |
214 | void *priv) | |
215 | { | |
216 | struct iio_dev *indio_dev = platform_get_drvdata(priv); | |
217 | struct gyro_3d_state *gyro_state = iio_priv(indio_dev); | |
218 | int offset; | |
219 | int ret = -EINVAL; | |
220 | ||
221 | switch (usage_id) { | |
222 | case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS: | |
223 | case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS: | |
224 | case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS: | |
225 | offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS; | |
226 | gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] = | |
227 | *(u32 *)raw_data; | |
228 | ret = 0; | |
229 | break; | |
230 | default: | |
231 | break; | |
232 | } | |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
237 | /* Parse report which is specific to an usage id*/ | |
238 | static int gyro_3d_parse_report(struct platform_device *pdev, | |
239 | struct hid_sensor_hub_device *hsdev, | |
240 | struct iio_chan_spec *channels, | |
241 | unsigned usage_id, | |
242 | struct gyro_3d_state *st) | |
243 | { | |
244 | int ret; | |
245 | int i; | |
246 | ||
247 | for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { | |
248 | ret = sensor_hub_input_get_attribute_info(hsdev, | |
249 | HID_INPUT_REPORT, | |
250 | usage_id, | |
251 | HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i, | |
252 | &st->gyro[CHANNEL_SCAN_INDEX_X + i]); | |
253 | if (ret < 0) | |
254 | break; | |
255 | gyro_3d_adjust_channel_bit_mask(channels, | |
256 | CHANNEL_SCAN_INDEX_X + i, | |
257 | st->gyro[CHANNEL_SCAN_INDEX_X + i].size); | |
258 | } | |
259 | dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n", | |
260 | st->gyro[0].index, | |
261 | st->gyro[0].report_id, | |
262 | st->gyro[1].index, st->gyro[1].report_id, | |
263 | st->gyro[2].index, st->gyro[2].report_id); | |
264 | ||
265 | return ret; | |
266 | } | |
267 | ||
268 | /* Function to initialize the processing for usage id */ | |
fc52692c | 269 | static int hid_gyro_3d_probe(struct platform_device *pdev) |
c5bdbef7 | 270 | { |
271 | int ret = 0; | |
272 | static const char *name = "gyro_3d"; | |
273 | struct iio_dev *indio_dev; | |
274 | struct gyro_3d_state *gyro_state; | |
275 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; | |
276 | struct iio_chan_spec *channels; | |
277 | ||
1ba15cf2 SK |
278 | indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state)); |
279 | if (!indio_dev) | |
280 | return -ENOMEM; | |
c5bdbef7 | 281 | platform_set_drvdata(pdev, indio_dev); |
282 | ||
283 | gyro_state = iio_priv(indio_dev); | |
284 | gyro_state->common_attributes.hsdev = hsdev; | |
285 | gyro_state->common_attributes.pdev = pdev; | |
286 | ||
287 | ret = hid_sensor_parse_common_attributes(hsdev, | |
288 | HID_USAGE_SENSOR_GYRO_3D, | |
289 | &gyro_state->common_attributes); | |
290 | if (ret) { | |
291 | dev_err(&pdev->dev, "failed to setup common attributes\n"); | |
1ba15cf2 | 292 | return ret; |
c5bdbef7 | 293 | } |
294 | ||
64ebe955 AL |
295 | channels = kmemdup(gyro_3d_channels, sizeof(gyro_3d_channels), |
296 | GFP_KERNEL); | |
c5bdbef7 | 297 | if (!channels) { |
298 | dev_err(&pdev->dev, "failed to duplicate channels\n"); | |
1ba15cf2 | 299 | return -ENOMEM; |
c5bdbef7 | 300 | } |
301 | ||
302 | ret = gyro_3d_parse_report(pdev, hsdev, channels, | |
303 | HID_USAGE_SENSOR_GYRO_3D, gyro_state); | |
304 | if (ret) { | |
305 | dev_err(&pdev->dev, "failed to setup attributes\n"); | |
306 | goto error_free_dev_mem; | |
307 | } | |
308 | ||
309 | indio_dev->channels = channels; | |
310 | indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels); | |
311 | indio_dev->dev.parent = &pdev->dev; | |
312 | indio_dev->info = &gyro_3d_info; | |
313 | indio_dev->name = name; | |
314 | indio_dev->modes = INDIO_DIRECT_MODE; | |
315 | ||
316 | ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, | |
317 | NULL, NULL); | |
318 | if (ret) { | |
319 | dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); | |
320 | goto error_free_dev_mem; | |
321 | } | |
322 | gyro_state->common_attributes.data_ready = false; | |
323 | ret = hid_sensor_setup_trigger(indio_dev, name, | |
324 | &gyro_state->common_attributes); | |
325 | if (ret < 0) { | |
326 | dev_err(&pdev->dev, "trigger setup failed\n"); | |
327 | goto error_unreg_buffer_funcs; | |
328 | } | |
329 | ||
330 | ret = iio_device_register(indio_dev); | |
331 | if (ret) { | |
332 | dev_err(&pdev->dev, "device register failed\n"); | |
333 | goto error_remove_trigger; | |
334 | } | |
335 | ||
336 | gyro_state->callbacks.send_event = gyro_3d_proc_event; | |
337 | gyro_state->callbacks.capture_sample = gyro_3d_capture_sample; | |
338 | gyro_state->callbacks.pdev = pdev; | |
339 | ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D, | |
340 | &gyro_state->callbacks); | |
341 | if (ret < 0) { | |
342 | dev_err(&pdev->dev, "callback reg failed\n"); | |
343 | goto error_iio_unreg; | |
344 | } | |
345 | ||
346 | return ret; | |
347 | ||
348 | error_iio_unreg: | |
349 | iio_device_unregister(indio_dev); | |
350 | error_remove_trigger: | |
ec7f68e0 | 351 | hid_sensor_remove_trigger(&gyro_state->common_attributes); |
c5bdbef7 | 352 | error_unreg_buffer_funcs: |
353 | iio_triggered_buffer_cleanup(indio_dev); | |
354 | error_free_dev_mem: | |
355 | kfree(indio_dev->channels); | |
c5bdbef7 | 356 | return ret; |
357 | } | |
358 | ||
359 | /* Function to deinitialize the processing for usage id */ | |
fc52692c | 360 | static int hid_gyro_3d_remove(struct platform_device *pdev) |
c5bdbef7 | 361 | { |
362 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; | |
363 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); | |
ec7f68e0 | 364 | struct gyro_3d_state *gyro_state = iio_priv(indio_dev); |
c5bdbef7 | 365 | |
366 | sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D); | |
367 | iio_device_unregister(indio_dev); | |
ec7f68e0 | 368 | hid_sensor_remove_trigger(&gyro_state->common_attributes); |
c5bdbef7 | 369 | iio_triggered_buffer_cleanup(indio_dev); |
370 | kfree(indio_dev->channels); | |
c5bdbef7 | 371 | |
372 | return 0; | |
373 | } | |
374 | ||
a411e735 AH |
375 | static struct platform_device_id hid_gyro_3d_ids[] = { |
376 | { | |
377 | /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ | |
378 | .name = "HID-SENSOR-200076", | |
379 | }, | |
380 | { /* sentinel */ } | |
381 | }; | |
382 | MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids); | |
383 | ||
c5bdbef7 | 384 | static struct platform_driver hid_gyro_3d_platform_driver = { |
a411e735 | 385 | .id_table = hid_gyro_3d_ids, |
c5bdbef7 | 386 | .driver = { |
a411e735 | 387 | .name = KBUILD_MODNAME, |
c5bdbef7 | 388 | .owner = THIS_MODULE, |
389 | }, | |
390 | .probe = hid_gyro_3d_probe, | |
391 | .remove = hid_gyro_3d_remove, | |
392 | }; | |
393 | module_platform_driver(hid_gyro_3d_platform_driver); | |
394 | ||
395 | MODULE_DESCRIPTION("HID Sensor Gyroscope 3D"); | |
396 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); | |
397 | MODULE_LICENSE("GPL"); |