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7#include <linux/device.h>
8#include <linux/platform_device.h>
9#include <linux/module.h>
10#include <linux/interrupt.h>
11#include <linux/irq.h>
12#include <linux/slab.h>
13#include <linux/delay.h>
14#include <linux/hid-sensor-hub.h>
15#include <linux/iio/iio.h>
16#include <linux/iio/sysfs.h>
17#include <linux/iio/buffer.h>
18#include <linux/iio/trigger_consumer.h>
19#include <linux/iio/triggered_buffer.h>
20#include "../common/hid-sensors/hid-sensor-trigger.h"
21
22enum incl_3d_channel {
23 CHANNEL_SCAN_INDEX_X,
24 CHANNEL_SCAN_INDEX_Y,
25 CHANNEL_SCAN_INDEX_Z,
26 INCLI_3D_CHANNEL_MAX,
27};
28
29struct incl_3d_state {
30 struct hid_sensor_hub_callbacks callbacks;
31 struct hid_sensor_common common_attributes;
32 struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
33 u32 incl_val[INCLI_3D_CHANNEL_MAX];
34 int scale_pre_decml;
35 int scale_post_decml;
36 int scale_precision;
37 int value_offset;
38};
39
40static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
41 HID_USAGE_SENSOR_ORIENT_TILT_X,
42 HID_USAGE_SENSOR_ORIENT_TILT_Y,
43 HID_USAGE_SENSOR_ORIENT_TILT_Z
44};
45
46
47static const struct iio_chan_spec incl_3d_channels[] = {
48 {
49 .type = IIO_INCLI,
50 .modified = 1,
51 .channel2 = IIO_MOD_X,
52 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
53 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
54 BIT(IIO_CHAN_INFO_SCALE) |
55 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
56 BIT(IIO_CHAN_INFO_HYSTERESIS),
57 .scan_index = CHANNEL_SCAN_INDEX_X,
58 }, {
59 .type = IIO_INCLI,
60 .modified = 1,
61 .channel2 = IIO_MOD_Y,
62 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
63 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
64 BIT(IIO_CHAN_INFO_SCALE) |
65 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
66 BIT(IIO_CHAN_INFO_HYSTERESIS),
67 .scan_index = CHANNEL_SCAN_INDEX_Y,
68 }, {
69 .type = IIO_INCLI,
70 .modified = 1,
71 .channel2 = IIO_MOD_Z,
72 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
73 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
74 BIT(IIO_CHAN_INFO_SCALE) |
75 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
76 BIT(IIO_CHAN_INFO_HYSTERESIS),
77 .scan_index = CHANNEL_SCAN_INDEX_Z,
78 }
79};
80
81
82static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
83 int size)
84{
85 chan->scan_type.sign = 's';
86
87 chan->scan_type.realbits = size * 8;
88
89 chan->scan_type.storagebits = sizeof(u32) * 8;
90}
91
92
93static int incl_3d_read_raw(struct iio_dev *indio_dev,
94 struct iio_chan_spec const *chan,
95 int *val, int *val2,
96 long mask)
97{
98 struct incl_3d_state *incl_state = iio_priv(indio_dev);
99 int report_id = -1;
100 u32 address;
101 int ret_type;
102 s32 min;
103
104 *val = 0;
105 *val2 = 0;
106 switch (mask) {
107 case IIO_CHAN_INFO_RAW:
108 hid_sensor_power_state(&incl_state->common_attributes, true);
109 report_id = incl_state->incl[chan->scan_index].report_id;
110 min = incl_state->incl[chan->scan_index].logical_minimum;
111 address = incl_3d_addresses[chan->scan_index];
112 if (report_id >= 0)
113 *val = sensor_hub_input_attr_get_raw_value(
114 incl_state->common_attributes.hsdev,
115 HID_USAGE_SENSOR_INCLINOMETER_3D, address,
116 report_id,
117 SENSOR_HUB_SYNC,
118 min < 0);
119 else {
120 hid_sensor_power_state(&incl_state->common_attributes,
121 false);
122 return -EINVAL;
123 }
124 hid_sensor_power_state(&incl_state->common_attributes, false);
125 ret_type = IIO_VAL_INT;
126 break;
127 case IIO_CHAN_INFO_SCALE:
128 *val = incl_state->scale_pre_decml;
129 *val2 = incl_state->scale_post_decml;
130 ret_type = incl_state->scale_precision;
131 break;
132 case IIO_CHAN_INFO_OFFSET:
133 *val = incl_state->value_offset;
134 ret_type = IIO_VAL_INT;
135 break;
136 case IIO_CHAN_INFO_SAMP_FREQ:
137 ret_type = hid_sensor_read_samp_freq_value(
138 &incl_state->common_attributes, val, val2);
139 break;
140 case IIO_CHAN_INFO_HYSTERESIS:
141 ret_type = hid_sensor_read_raw_hyst_value(
142 &incl_state->common_attributes, val, val2);
143 break;
144 default:
145 ret_type = -EINVAL;
146 break;
147 }
148
149 return ret_type;
150}
151
152
153static int incl_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 incl_3d_state *incl_state = iio_priv(indio_dev);
160 int ret;
161
162 switch (mask) {
163 case IIO_CHAN_INFO_SAMP_FREQ:
164 ret = hid_sensor_write_samp_freq_value(
165 &incl_state->common_attributes, val, val2);
166 break;
167 case IIO_CHAN_INFO_HYSTERESIS:
168 ret = hid_sensor_write_raw_hyst_value(
169 &incl_state->common_attributes, val, val2);
170 break;
171 default:
172 ret = -EINVAL;
173 }
174
175 return ret;
176}
177
178static const struct iio_info incl_3d_info = {
179 .read_raw = &incl_3d_read_raw,
180 .write_raw = &incl_3d_write_raw,
181};
182
183
184static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
185{
186 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
187 iio_push_to_buffers(indio_dev, (u8 *)data);
188}
189
190
191static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
192 unsigned usage_id,
193 void *priv)
194{
195 struct iio_dev *indio_dev = platform_get_drvdata(priv);
196 struct incl_3d_state *incl_state = iio_priv(indio_dev);
197
198 dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
199 if (atomic_read(&incl_state->common_attributes.data_ready))
200 hid_sensor_push_data(indio_dev,
201 (u8 *)incl_state->incl_val,
202 sizeof(incl_state->incl_val));
203
204 return 0;
205}
206
207
208static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
209 unsigned usage_id,
210 size_t raw_len, char *raw_data,
211 void *priv)
212{
213 struct iio_dev *indio_dev = platform_get_drvdata(priv);
214 struct incl_3d_state *incl_state = iio_priv(indio_dev);
215 int ret = 0;
216
217 switch (usage_id) {
218 case HID_USAGE_SENSOR_ORIENT_TILT_X:
219 incl_state->incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
220 break;
221 case HID_USAGE_SENSOR_ORIENT_TILT_Y:
222 incl_state->incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
223 break;
224 case HID_USAGE_SENSOR_ORIENT_TILT_Z:
225 incl_state->incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
226 break;
227 default:
228 ret = -EINVAL;
229 break;
230 }
231
232 return ret;
233}
234
235
236static int incl_3d_parse_report(struct platform_device *pdev,
237 struct hid_sensor_hub_device *hsdev,
238 struct iio_chan_spec *channels,
239 unsigned usage_id,
240 struct incl_3d_state *st)
241{
242 int ret;
243
244 ret = sensor_hub_input_get_attribute_info(hsdev,
245 HID_INPUT_REPORT,
246 usage_id,
247 HID_USAGE_SENSOR_ORIENT_TILT_X,
248 &st->incl[CHANNEL_SCAN_INDEX_X]);
249 if (ret)
250 return ret;
251 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
252 st->incl[CHANNEL_SCAN_INDEX_X].size);
253
254 ret = sensor_hub_input_get_attribute_info(hsdev,
255 HID_INPUT_REPORT,
256 usage_id,
257 HID_USAGE_SENSOR_ORIENT_TILT_Y,
258 &st->incl[CHANNEL_SCAN_INDEX_Y]);
259 if (ret)
260 return ret;
261 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
262 st->incl[CHANNEL_SCAN_INDEX_Y].size);
263
264 ret = sensor_hub_input_get_attribute_info(hsdev,
265 HID_INPUT_REPORT,
266 usage_id,
267 HID_USAGE_SENSOR_ORIENT_TILT_Z,
268 &st->incl[CHANNEL_SCAN_INDEX_Z]);
269 if (ret)
270 return ret;
271 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
272 st->incl[CHANNEL_SCAN_INDEX_Z].size);
273
274 dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
275 st->incl[0].index,
276 st->incl[0].report_id,
277 st->incl[1].index, st->incl[1].report_id,
278 st->incl[2].index, st->incl[2].report_id);
279
280 st->scale_precision = hid_sensor_format_scale(
281 HID_USAGE_SENSOR_INCLINOMETER_3D,
282 &st->incl[CHANNEL_SCAN_INDEX_X],
283 &st->scale_pre_decml, &st->scale_post_decml);
284
285
286 if (st->common_attributes.sensitivity.index < 0) {
287 sensor_hub_input_get_attribute_info(hsdev,
288 HID_FEATURE_REPORT, usage_id,
289 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
290 HID_USAGE_SENSOR_DATA_ORIENTATION,
291 &st->common_attributes.sensitivity);
292 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
293 st->common_attributes.sensitivity.index,
294 st->common_attributes.sensitivity.report_id);
295 }
296 return ret;
297}
298
299
300static int hid_incl_3d_probe(struct platform_device *pdev)
301{
302 int ret;
303 static char *name = "incli_3d";
304 struct iio_dev *indio_dev;
305 struct incl_3d_state *incl_state;
306 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
307
308 indio_dev = devm_iio_device_alloc(&pdev->dev,
309 sizeof(struct incl_3d_state));
310 if (indio_dev == NULL)
311 return -ENOMEM;
312
313 platform_set_drvdata(pdev, indio_dev);
314
315 incl_state = iio_priv(indio_dev);
316 incl_state->common_attributes.hsdev = hsdev;
317 incl_state->common_attributes.pdev = pdev;
318
319 ret = hid_sensor_parse_common_attributes(hsdev,
320 HID_USAGE_SENSOR_INCLINOMETER_3D,
321 &incl_state->common_attributes);
322 if (ret) {
323 dev_err(&pdev->dev, "failed to setup common attributes\n");
324 return ret;
325 }
326
327 indio_dev->channels = kmemdup(incl_3d_channels,
328 sizeof(incl_3d_channels), GFP_KERNEL);
329 if (!indio_dev->channels) {
330 dev_err(&pdev->dev, "failed to duplicate channels\n");
331 return -ENOMEM;
332 }
333
334 ret = incl_3d_parse_report(pdev, hsdev,
335 (struct iio_chan_spec *)indio_dev->channels,
336 HID_USAGE_SENSOR_INCLINOMETER_3D,
337 incl_state);
338 if (ret) {
339 dev_err(&pdev->dev, "failed to setup attributes\n");
340 goto error_free_dev_mem;
341 }
342
343 indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
344 indio_dev->dev.parent = &pdev->dev;
345 indio_dev->info = &incl_3d_info;
346 indio_dev->name = name;
347 indio_dev->modes = INDIO_DIRECT_MODE;
348
349 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
350 NULL, NULL);
351 if (ret) {
352 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
353 goto error_free_dev_mem;
354 }
355 atomic_set(&incl_state->common_attributes.data_ready, 0);
356 ret = hid_sensor_setup_trigger(indio_dev, name,
357 &incl_state->common_attributes);
358 if (ret) {
359 dev_err(&pdev->dev, "trigger setup failed\n");
360 goto error_unreg_buffer_funcs;
361 }
362
363 ret = iio_device_register(indio_dev);
364 if (ret) {
365 dev_err(&pdev->dev, "device register failed\n");
366 goto error_remove_trigger;
367 }
368
369 incl_state->callbacks.send_event = incl_3d_proc_event;
370 incl_state->callbacks.capture_sample = incl_3d_capture_sample;
371 incl_state->callbacks.pdev = pdev;
372 ret = sensor_hub_register_callback(hsdev,
373 HID_USAGE_SENSOR_INCLINOMETER_3D,
374 &incl_state->callbacks);
375 if (ret) {
376 dev_err(&pdev->dev, "callback reg failed\n");
377 goto error_iio_unreg;
378 }
379
380 return 0;
381
382error_iio_unreg:
383 iio_device_unregister(indio_dev);
384error_remove_trigger:
385 hid_sensor_remove_trigger(&incl_state->common_attributes);
386error_unreg_buffer_funcs:
387 iio_triggered_buffer_cleanup(indio_dev);
388error_free_dev_mem:
389 kfree(indio_dev->channels);
390 return ret;
391}
392
393
394static int hid_incl_3d_remove(struct platform_device *pdev)
395{
396 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
397 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
398 struct incl_3d_state *incl_state = iio_priv(indio_dev);
399
400 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
401 iio_device_unregister(indio_dev);
402 hid_sensor_remove_trigger(&incl_state->common_attributes);
403 iio_triggered_buffer_cleanup(indio_dev);
404 kfree(indio_dev->channels);
405
406 return 0;
407}
408
409static const struct platform_device_id hid_incl_3d_ids[] = {
410 {
411
412 .name = "HID-SENSOR-200086",
413 },
414 { }
415};
416MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);
417
418static struct platform_driver hid_incl_3d_platform_driver = {
419 .id_table = hid_incl_3d_ids,
420 .driver = {
421 .name = KBUILD_MODNAME,
422 .pm = &hid_sensor_pm_ops,
423 },
424 .probe = hid_incl_3d_probe,
425 .remove = hid_incl_3d_remove,
426};
427module_platform_driver(hid_incl_3d_platform_driver);
428
429MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
430MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
431MODULE_LICENSE("GPL");
432
