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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 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
41struct accel_3d_state {
42 struct hid_sensor_hub_callbacks callbacks;
43 struct hid_sensor_common common_attributes;
44 struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
45
46 u32 accel_val[ACCEL_3D_CHANNEL_MAX + 3];
47 int scale_pre_decml;
48 int scale_post_decml;
49 int scale_precision;
50 int value_offset;
51 int64_t timestamp;
52};
53
54static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
55 HID_USAGE_SENSOR_ACCEL_X_AXIS,
56 HID_USAGE_SENSOR_ACCEL_Y_AXIS,
57 HID_USAGE_SENSOR_ACCEL_Z_AXIS
58};
59
60
61static const struct iio_chan_spec accel_3d_channels[] = {
62 {
63 .type = IIO_ACCEL,
64 .modified = 1,
65 .channel2 = IIO_MOD_X,
66 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
67 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
68 BIT(IIO_CHAN_INFO_SCALE) |
69 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
70 BIT(IIO_CHAN_INFO_HYSTERESIS),
71 .scan_index = CHANNEL_SCAN_INDEX_X,
72 }, {
73 .type = IIO_ACCEL,
74 .modified = 1,
75 .channel2 = IIO_MOD_Y,
76 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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),
81 .scan_index = CHANNEL_SCAN_INDEX_Y,
82 }, {
83 .type = IIO_ACCEL,
84 .modified = 1,
85 .channel2 = IIO_MOD_Z,
86 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
87 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
88 BIT(IIO_CHAN_INFO_SCALE) |
89 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
90 BIT(IIO_CHAN_INFO_HYSTERESIS),
91 .scan_index = CHANNEL_SCAN_INDEX_Z,
92 },
93 IIO_CHAN_SOFT_TIMESTAMP(3)
94};
95
96
97static const struct iio_chan_spec gravity_channels[] = {
98 {
99 .type = IIO_GRAVITY,
100 .modified = 1,
101 .channel2 = IIO_MOD_X,
102 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
103 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
104 BIT(IIO_CHAN_INFO_SCALE) |
105 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
106 BIT(IIO_CHAN_INFO_HYSTERESIS),
107 .scan_index = CHANNEL_SCAN_INDEX_X,
108 }, {
109 .type = IIO_GRAVITY,
110 .modified = 1,
111 .channel2 = IIO_MOD_Y,
112 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
113 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
114 BIT(IIO_CHAN_INFO_SCALE) |
115 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
116 BIT(IIO_CHAN_INFO_HYSTERESIS),
117 .scan_index = CHANNEL_SCAN_INDEX_Y,
118 }, {
119 .type = IIO_GRAVITY,
120 .modified = 1,
121 .channel2 = IIO_MOD_Z,
122 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
123 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
124 BIT(IIO_CHAN_INFO_SCALE) |
125 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
126 BIT(IIO_CHAN_INFO_HYSTERESIS),
127 .scan_index = CHANNEL_SCAN_INDEX_Z,
128 }
129};
130
131
132static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
133 int channel, int size)
134{
135 channels[channel].scan_type.sign = 's';
136
137 channels[channel].scan_type.realbits = size * 8;
138
139 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
140}
141
142
143static int accel_3d_read_raw(struct iio_dev *indio_dev,
144 struct iio_chan_spec const *chan,
145 int *val, int *val2,
146 long mask)
147{
148 struct accel_3d_state *accel_state = iio_priv(indio_dev);
149 int report_id = -1;
150 u32 address;
151 int ret_type;
152 struct hid_sensor_hub_device *hsdev =
153 accel_state->common_attributes.hsdev;
154
155 *val = 0;
156 *val2 = 0;
157 switch (mask) {
158 case IIO_CHAN_INFO_RAW:
159 hid_sensor_power_state(&accel_state->common_attributes, true);
160 report_id = accel_state->accel[chan->scan_index].report_id;
161 address = accel_3d_addresses[chan->scan_index];
162 if (report_id >= 0)
163 *val = sensor_hub_input_attr_get_raw_value(
164 accel_state->common_attributes.hsdev,
165 hsdev->usage, address, report_id,
166 SENSOR_HUB_SYNC);
167 else {
168 *val = 0;
169 hid_sensor_power_state(&accel_state->common_attributes,
170 false);
171 return -EINVAL;
172 }
173 hid_sensor_power_state(&accel_state->common_attributes, false);
174 ret_type = IIO_VAL_INT;
175 break;
176 case IIO_CHAN_INFO_SCALE:
177 *val = accel_state->scale_pre_decml;
178 *val2 = accel_state->scale_post_decml;
179 ret_type = accel_state->scale_precision;
180 break;
181 case IIO_CHAN_INFO_OFFSET:
182 *val = accel_state->value_offset;
183 ret_type = IIO_VAL_INT;
184 break;
185 case IIO_CHAN_INFO_SAMP_FREQ:
186 ret_type = hid_sensor_read_samp_freq_value(
187 &accel_state->common_attributes, val, val2);
188 break;
189 case IIO_CHAN_INFO_HYSTERESIS:
190 ret_type = hid_sensor_read_raw_hyst_value(
191 &accel_state->common_attributes, val, val2);
192 break;
193 default:
194 ret_type = -EINVAL;
195 break;
196 }
197
198 return ret_type;
199}
200
201
202static int accel_3d_write_raw(struct iio_dev *indio_dev,
203 struct iio_chan_spec const *chan,
204 int val,
205 int val2,
206 long mask)
207{
208 struct accel_3d_state *accel_state = iio_priv(indio_dev);
209 int ret = 0;
210
211 switch (mask) {
212 case IIO_CHAN_INFO_SAMP_FREQ:
213 ret = hid_sensor_write_samp_freq_value(
214 &accel_state->common_attributes, val, val2);
215 break;
216 case IIO_CHAN_INFO_HYSTERESIS:
217 ret = hid_sensor_write_raw_hyst_value(
218 &accel_state->common_attributes, val, val2);
219 break;
220 default:
221 ret = -EINVAL;
222 }
223
224 return ret;
225}
226
227static const struct iio_info accel_3d_info = {
228 .read_raw = &accel_3d_read_raw,
229 .write_raw = &accel_3d_write_raw,
230};
231
232
233static void hid_sensor_push_data(struct iio_dev *indio_dev, void *data,
234 int len, int64_t timestamp)
235{
236 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
237 iio_push_to_buffers_with_timestamp(indio_dev, data, timestamp);
238}
239
240
241static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
242 unsigned usage_id,
243 void *priv)
244{
245 struct iio_dev *indio_dev = platform_get_drvdata(priv);
246 struct accel_3d_state *accel_state = iio_priv(indio_dev);
247
248 dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n");
249 if (atomic_read(&accel_state->common_attributes.data_ready)) {
250 if (!accel_state->timestamp)
251 accel_state->timestamp = iio_get_time_ns(indio_dev);
252
253 hid_sensor_push_data(indio_dev,
254 accel_state->accel_val,
255 sizeof(accel_state->accel_val),
256 accel_state->timestamp);
257
258 accel_state->timestamp = 0;
259 }
260
261 return 0;
262}
263
264
265static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
266 unsigned usage_id,
267 size_t raw_len, char *raw_data,
268 void *priv)
269{
270 struct iio_dev *indio_dev = platform_get_drvdata(priv);
271 struct accel_3d_state *accel_state = iio_priv(indio_dev);
272 int offset;
273 int ret = -EINVAL;
274
275 switch (usage_id) {
276 case HID_USAGE_SENSOR_ACCEL_X_AXIS:
277 case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
278 case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
279 offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
280 accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] =
281 *(u32 *)raw_data;
282 ret = 0;
283 break;
284 case HID_USAGE_SENSOR_TIME_TIMESTAMP:
285 accel_state->timestamp =
286 hid_sensor_convert_timestamp(
287 &accel_state->common_attributes,
288 *(int64_t *)raw_data);
289 break;
290 default:
291 break;
292 }
293
294 return ret;
295}
296
297
298static int accel_3d_parse_report(struct platform_device *pdev,
299 struct hid_sensor_hub_device *hsdev,
300 struct iio_chan_spec *channels,
301 unsigned usage_id,
302 struct accel_3d_state *st)
303{
304 int ret;
305 int i;
306
307 for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
308 ret = sensor_hub_input_get_attribute_info(hsdev,
309 HID_INPUT_REPORT,
310 usage_id,
311 HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
312 &st->accel[CHANNEL_SCAN_INDEX_X + i]);
313 if (ret < 0)
314 break;
315 accel_3d_adjust_channel_bit_mask(channels,
316 CHANNEL_SCAN_INDEX_X + i,
317 st->accel[CHANNEL_SCAN_INDEX_X + i].size);
318 }
319 dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
320 st->accel[0].index,
321 st->accel[0].report_id,
322 st->accel[1].index, st->accel[1].report_id,
323 st->accel[2].index, st->accel[2].report_id);
324
325 st->scale_precision = hid_sensor_format_scale(
326 hsdev->usage,
327 &st->accel[CHANNEL_SCAN_INDEX_X],
328 &st->scale_pre_decml, &st->scale_post_decml);
329
330
331 if (st->common_attributes.sensitivity.index < 0) {
332 sensor_hub_input_get_attribute_info(hsdev,
333 HID_FEATURE_REPORT, usage_id,
334 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
335 HID_USAGE_SENSOR_DATA_ACCELERATION,
336 &st->common_attributes.sensitivity);
337 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
338 st->common_attributes.sensitivity.index,
339 st->common_attributes.sensitivity.report_id);
340 }
341
342 return ret;
343}
344
345
346static int hid_accel_3d_probe(struct platform_device *pdev)
347{
348 int ret = 0;
349 const char *name;
350 struct iio_dev *indio_dev;
351 struct accel_3d_state *accel_state;
352 const struct iio_chan_spec *channel_spec;
353 int channel_size;
354
355 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
356
357 indio_dev = devm_iio_device_alloc(&pdev->dev,
358 sizeof(struct accel_3d_state));
359 if (indio_dev == NULL)
360 return -ENOMEM;
361
362 platform_set_drvdata(pdev, indio_dev);
363
364 accel_state = iio_priv(indio_dev);
365 accel_state->common_attributes.hsdev = hsdev;
366 accel_state->common_attributes.pdev = pdev;
367
368 if (hsdev->usage == HID_USAGE_SENSOR_ACCEL_3D) {
369 name = "accel_3d";
370 channel_spec = accel_3d_channels;
371 channel_size = sizeof(accel_3d_channels);
372 indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
373 } else {
374 name = "gravity";
375 channel_spec = gravity_channels;
376 channel_size = sizeof(gravity_channels);
377 indio_dev->num_channels = ARRAY_SIZE(gravity_channels);
378 }
379 ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
380 &accel_state->common_attributes);
381 if (ret) {
382 dev_err(&pdev->dev, "failed to setup common attributes\n");
383 return ret;
384 }
385 indio_dev->channels = kmemdup(channel_spec, channel_size, GFP_KERNEL);
386
387 if (!indio_dev->channels) {
388 dev_err(&pdev->dev, "failed to duplicate channels\n");
389 return -ENOMEM;
390 }
391 ret = accel_3d_parse_report(pdev, hsdev,
392 (struct iio_chan_spec *)indio_dev->channels,
393 hsdev->usage, accel_state);
394 if (ret) {
395 dev_err(&pdev->dev, "failed to setup attributes\n");
396 goto error_free_dev_mem;
397 }
398
399 indio_dev->dev.parent = &pdev->dev;
400 indio_dev->info = &accel_3d_info;
401 indio_dev->name = name;
402 indio_dev->modes = INDIO_DIRECT_MODE;
403
404 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
405 NULL, NULL);
406 if (ret) {
407 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
408 goto error_free_dev_mem;
409 }
410 atomic_set(&accel_state->common_attributes.data_ready, 0);
411 ret = hid_sensor_setup_trigger(indio_dev, name,
412 &accel_state->common_attributes);
413 if (ret < 0) {
414 dev_err(&pdev->dev, "trigger setup failed\n");
415 goto error_unreg_buffer_funcs;
416 }
417
418 ret = iio_device_register(indio_dev);
419 if (ret) {
420 dev_err(&pdev->dev, "device register failed\n");
421 goto error_remove_trigger;
422 }
423
424 accel_state->callbacks.send_event = accel_3d_proc_event;
425 accel_state->callbacks.capture_sample = accel_3d_capture_sample;
426 accel_state->callbacks.pdev = pdev;
427 ret = sensor_hub_register_callback(hsdev, hsdev->usage,
428 &accel_state->callbacks);
429 if (ret < 0) {
430 dev_err(&pdev->dev, "callback reg failed\n");
431 goto error_iio_unreg;
432 }
433
434 return ret;
435
436error_iio_unreg:
437 iio_device_unregister(indio_dev);
438error_remove_trigger:
439 hid_sensor_remove_trigger(&accel_state->common_attributes);
440error_unreg_buffer_funcs:
441 iio_triggered_buffer_cleanup(indio_dev);
442error_free_dev_mem:
443 kfree(indio_dev->channels);
444 return ret;
445}
446
447
448static int hid_accel_3d_remove(struct platform_device *pdev)
449{
450 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
451 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
452 struct accel_3d_state *accel_state = iio_priv(indio_dev);
453
454 sensor_hub_remove_callback(hsdev, hsdev->usage);
455 iio_device_unregister(indio_dev);
456 hid_sensor_remove_trigger(&accel_state->common_attributes);
457 iio_triggered_buffer_cleanup(indio_dev);
458 kfree(indio_dev->channels);
459
460 return 0;
461}
462
463static const struct platform_device_id hid_accel_3d_ids[] = {
464 {
465
466 .name = "HID-SENSOR-200073",
467 },
468 {
469 .name = "HID-SENSOR-20007b",
470 },
471 { }
472};
473MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids);
474
475static struct platform_driver hid_accel_3d_platform_driver = {
476 .id_table = hid_accel_3d_ids,
477 .driver = {
478 .name = KBUILD_MODNAME,
479 .pm = &hid_sensor_pm_ops,
480 },
481 .probe = hid_accel_3d_probe,
482 .remove = hid_accel_3d_remove,
483};
484module_platform_driver(hid_accel_3d_platform_driver);
485
486MODULE_DESCRIPTION("HID Sensor Accel 3D");
487MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
488MODULE_LICENSE("GPL");
489
