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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/delay.h>
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>
32#include "../common/hid-sensors/hid-sensor-trigger.h"
33
34enum gyro_3d_channel {
35 CHANNEL_SCAN_INDEX_X,
36 CHANNEL_SCAN_INDEX_Y,
37 CHANNEL_SCAN_INDEX_Z,
38 GYRO_3D_CHANNEL_MAX,
39};
40
41struct gyro_3d_state {
42 struct hid_sensor_hub_callbacks callbacks;
43 struct hid_sensor_common common_attributes;
44 struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
45 u32 gyro_val[GYRO_3D_CHANNEL_MAX];
46 int scale_pre_decml;
47 int scale_post_decml;
48 int scale_precision;
49 int value_offset;
50};
51
52static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
53 HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
54 HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
55 HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
56};
57
58
59static const struct iio_chan_spec gyro_3d_channels[] = {
60 {
61 .type = IIO_ANGL_VEL,
62 .modified = 1,
63 .channel2 = IIO_MOD_X,
64 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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),
69 .scan_index = CHANNEL_SCAN_INDEX_X,
70 }, {
71 .type = IIO_ANGL_VEL,
72 .modified = 1,
73 .channel2 = IIO_MOD_Y,
74 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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),
79 .scan_index = CHANNEL_SCAN_INDEX_Y,
80 }, {
81 .type = IIO_ANGL_VEL,
82 .modified = 1,
83 .channel2 = IIO_MOD_Z,
84 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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),
89 .scan_index = CHANNEL_SCAN_INDEX_Z,
90 }
91};
92
93
94static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
95 int channel, int size)
96{
97 channels[channel].scan_type.sign = 's';
98
99 channels[channel].scan_type.realbits = size * 8;
100
101 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
102}
103
104
105static int gyro_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 gyro_3d_state *gyro_state = iio_priv(indio_dev);
111 int report_id = -1;
112 u32 address;
113 int ret_type;
114
115 *val = 0;
116 *val2 = 0;
117 switch (mask) {
118 case 0:
119 hid_sensor_power_state(&gyro_state->common_attributes, true);
120 report_id = gyro_state->gyro[chan->scan_index].report_id;
121 address = gyro_3d_addresses[chan->scan_index];
122 if (report_id >= 0)
123 *val = sensor_hub_input_attr_get_raw_value(
124 gyro_state->common_attributes.hsdev,
125 HID_USAGE_SENSOR_GYRO_3D, address,
126 report_id,
127 SENSOR_HUB_SYNC);
128 else {
129 *val = 0;
130 hid_sensor_power_state(&gyro_state->common_attributes,
131 false);
132 return -EINVAL;
133 }
134 hid_sensor_power_state(&gyro_state->common_attributes, false);
135 ret_type = IIO_VAL_INT;
136 break;
137 case IIO_CHAN_INFO_SCALE:
138 *val = gyro_state->scale_pre_decml;
139 *val2 = gyro_state->scale_post_decml;
140 ret_type = gyro_state->scale_precision;
141 break;
142 case IIO_CHAN_INFO_OFFSET:
143 *val = gyro_state->value_offset;
144 ret_type = IIO_VAL_INT;
145 break;
146 case IIO_CHAN_INFO_SAMP_FREQ:
147 ret_type = hid_sensor_read_samp_freq_value(
148 &gyro_state->common_attributes, val, val2);
149 break;
150 case IIO_CHAN_INFO_HYSTERESIS:
151 ret_type = hid_sensor_read_raw_hyst_value(
152 &gyro_state->common_attributes, val, val2);
153 break;
154 default:
155 ret_type = -EINVAL;
156 break;
157 }
158
159 return ret_type;
160}
161
162
163static int gyro_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 gyro_3d_state *gyro_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 &gyro_state->common_attributes, val, val2);
176 break;
177 case IIO_CHAN_INFO_HYSTERESIS:
178 ret = hid_sensor_write_raw_hyst_value(
179 &gyro_state->common_attributes, val, val2);
180 break;
181 default:
182 ret = -EINVAL;
183 }
184
185 return ret;
186}
187
188static const struct iio_info gyro_3d_info = {
189 .driver_module = THIS_MODULE,
190 .read_raw = &gyro_3d_read_raw,
191 .write_raw = &gyro_3d_write_raw,
192};
193
194
195static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
196 int len)
197{
198 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
199 iio_push_to_buffers(indio_dev, data);
200}
201
202
203static int gyro_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 gyro_3d_state *gyro_state = iio_priv(indio_dev);
209
210 dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
211 if (atomic_read(&gyro_state->common_attributes.data_ready))
212 hid_sensor_push_data(indio_dev,
213 gyro_state->gyro_val,
214 sizeof(gyro_state->gyro_val));
215
216 return 0;
217}
218
219
220static int gyro_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 gyro_3d_state *gyro_state = iio_priv(indio_dev);
227 int offset;
228 int ret = -EINVAL;
229
230 switch (usage_id) {
231 case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS:
232 case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
233 case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
234 offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
235 gyro_state->gyro_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
247static int gyro_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 gyro_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_ANGL_VELOCITY_X_AXIS + i,
261 &st->gyro[CHANNEL_SCAN_INDEX_X + i]);
262 if (ret < 0)
263 break;
264 gyro_3d_adjust_channel_bit_mask(channels,
265 CHANNEL_SCAN_INDEX_X + i,
266 st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
267 }
268 dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
269 st->gyro[0].index,
270 st->gyro[0].report_id,
271 st->gyro[1].index, st->gyro[1].report_id,
272 st->gyro[2].index, st->gyro[2].report_id);
273
274 st->scale_precision = hid_sensor_format_scale(
275 HID_USAGE_SENSOR_GYRO_3D,
276 &st->gyro[CHANNEL_SCAN_INDEX_X],
277 &st->scale_pre_decml, &st->scale_post_decml);
278
279
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_ANGL_VELOCITY,
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 return ret;
291}
292
293
294static int hid_gyro_3d_probe(struct platform_device *pdev)
295{
296 int ret = 0;
297 static const char *name = "gyro_3d";
298 struct iio_dev *indio_dev;
299 struct gyro_3d_state *gyro_state;
300 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
301
302 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
303 if (!indio_dev)
304 return -ENOMEM;
305 platform_set_drvdata(pdev, indio_dev);
306
307 gyro_state = iio_priv(indio_dev);
308 gyro_state->common_attributes.hsdev = hsdev;
309 gyro_state->common_attributes.pdev = pdev;
310
311 ret = hid_sensor_parse_common_attributes(hsdev,
312 HID_USAGE_SENSOR_GYRO_3D,
313 &gyro_state->common_attributes);
314 if (ret) {
315 dev_err(&pdev->dev, "failed to setup common attributes\n");
316 return ret;
317 }
318
319 indio_dev->channels = kmemdup(gyro_3d_channels,
320 sizeof(gyro_3d_channels), GFP_KERNEL);
321 if (!indio_dev->channels) {
322 dev_err(&pdev->dev, "failed to duplicate channels\n");
323 return -ENOMEM;
324 }
325
326 ret = gyro_3d_parse_report(pdev, hsdev,
327 (struct iio_chan_spec *)indio_dev->channels,
328 HID_USAGE_SENSOR_GYRO_3D, gyro_state);
329 if (ret) {
330 dev_err(&pdev->dev, "failed to setup attributes\n");
331 goto error_free_dev_mem;
332 }
333
334 indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
335 indio_dev->dev.parent = &pdev->dev;
336 indio_dev->info = &gyro_3d_info;
337 indio_dev->name = name;
338 indio_dev->modes = INDIO_DIRECT_MODE;
339
340 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
341 NULL, NULL);
342 if (ret) {
343 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
344 goto error_free_dev_mem;
345 }
346 atomic_set(&gyro_state->common_attributes.data_ready, 0);
347 ret = hid_sensor_setup_trigger(indio_dev, name,
348 &gyro_state->common_attributes);
349 if (ret < 0) {
350 dev_err(&pdev->dev, "trigger setup failed\n");
351 goto error_unreg_buffer_funcs;
352 }
353
354 ret = iio_device_register(indio_dev);
355 if (ret) {
356 dev_err(&pdev->dev, "device register failed\n");
357 goto error_remove_trigger;
358 }
359
360 gyro_state->callbacks.send_event = gyro_3d_proc_event;
361 gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
362 gyro_state->callbacks.pdev = pdev;
363 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
364 &gyro_state->callbacks);
365 if (ret < 0) {
366 dev_err(&pdev->dev, "callback reg failed\n");
367 goto error_iio_unreg;
368 }
369
370 return ret;
371
372error_iio_unreg:
373 iio_device_unregister(indio_dev);
374error_remove_trigger:
375 hid_sensor_remove_trigger(&gyro_state->common_attributes);
376error_unreg_buffer_funcs:
377 iio_triggered_buffer_cleanup(indio_dev);
378error_free_dev_mem:
379 kfree(indio_dev->channels);
380 return ret;
381}
382
383
384static int hid_gyro_3d_remove(struct platform_device *pdev)
385{
386 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
387 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
388 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
389
390 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
391 iio_device_unregister(indio_dev);
392 hid_sensor_remove_trigger(&gyro_state->common_attributes);
393 iio_triggered_buffer_cleanup(indio_dev);
394 kfree(indio_dev->channels);
395
396 return 0;
397}
398
399static const struct platform_device_id hid_gyro_3d_ids[] = {
400 {
401
402 .name = "HID-SENSOR-200076",
403 },
404 { }
405};
406MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids);
407
408static struct platform_driver hid_gyro_3d_platform_driver = {
409 .id_table = hid_gyro_3d_ids,
410 .driver = {
411 .name = KBUILD_MODNAME,
412 .pm = &hid_sensor_pm_ops,
413 },
414 .probe = hid_gyro_3d_probe,
415 .remove = hid_gyro_3d_remove,
416};
417module_platform_driver(hid_gyro_3d_platform_driver);
418
419MODULE_DESCRIPTION("HID Sensor Gyroscope 3D");
420MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
421MODULE_LICENSE("GPL");
422
