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6#include <linux/device.h>
7#include <linux/platform_device.h>
8#include <linux/module.h>
9#include <linux/interrupt.h>
10#include <linux/irq.h>
11#include <linux/slab.h>
12#include <linux/delay.h>
13#include <linux/hid-sensor-hub.h>
14#include <linux/iio/iio.h>
15#include <linux/iio/sysfs.h>
16#include <linux/iio/buffer.h>
17#include "../common/hid-sensors/hid-sensor-trigger.h"
18
19enum gyro_3d_channel {
20 CHANNEL_SCAN_INDEX_X,
21 CHANNEL_SCAN_INDEX_Y,
22 CHANNEL_SCAN_INDEX_Z,
23 GYRO_3D_CHANNEL_MAX,
24};
25
26struct gyro_3d_state {
27 struct hid_sensor_hub_callbacks callbacks;
28 struct hid_sensor_common common_attributes;
29 struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
30 u32 gyro_val[GYRO_3D_CHANNEL_MAX];
31 int scale_pre_decml;
32 int scale_post_decml;
33 int scale_precision;
34 int value_offset;
35};
36
37static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
38 HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
39 HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
40 HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
41};
42
43
44static const struct iio_chan_spec gyro_3d_channels[] = {
45 {
46 .type = IIO_ANGL_VEL,
47 .modified = 1,
48 .channel2 = IIO_MOD_X,
49 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
50 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
51 BIT(IIO_CHAN_INFO_SCALE) |
52 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
53 BIT(IIO_CHAN_INFO_HYSTERESIS),
54 .scan_index = CHANNEL_SCAN_INDEX_X,
55 }, {
56 .type = IIO_ANGL_VEL,
57 .modified = 1,
58 .channel2 = IIO_MOD_Y,
59 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
60 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
61 BIT(IIO_CHAN_INFO_SCALE) |
62 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
63 BIT(IIO_CHAN_INFO_HYSTERESIS),
64 .scan_index = CHANNEL_SCAN_INDEX_Y,
65 }, {
66 .type = IIO_ANGL_VEL,
67 .modified = 1,
68 .channel2 = IIO_MOD_Z,
69 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
70 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
71 BIT(IIO_CHAN_INFO_SCALE) |
72 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
73 BIT(IIO_CHAN_INFO_HYSTERESIS),
74 .scan_index = CHANNEL_SCAN_INDEX_Z,
75 }
76};
77
78
79static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
80 int channel, int size)
81{
82 channels[channel].scan_type.sign = 's';
83
84 channels[channel].scan_type.realbits = size * 8;
85
86 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
87}
88
89
90static int gyro_3d_read_raw(struct iio_dev *indio_dev,
91 struct iio_chan_spec const *chan,
92 int *val, int *val2,
93 long mask)
94{
95 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
96 int report_id = -1;
97 u32 address;
98 int ret_type;
99 s32 min;
100
101 *val = 0;
102 *val2 = 0;
103 switch (mask) {
104 case IIO_CHAN_INFO_RAW:
105 hid_sensor_power_state(&gyro_state->common_attributes, true);
106 report_id = gyro_state->gyro[chan->scan_index].report_id;
107 min = gyro_state->gyro[chan->scan_index].logical_minimum;
108 address = gyro_3d_addresses[chan->scan_index];
109 if (report_id >= 0)
110 *val = sensor_hub_input_attr_get_raw_value(
111 gyro_state->common_attributes.hsdev,
112 HID_USAGE_SENSOR_GYRO_3D, address,
113 report_id,
114 SENSOR_HUB_SYNC,
115 min < 0);
116 else {
117 *val = 0;
118 hid_sensor_power_state(&gyro_state->common_attributes,
119 false);
120 return -EINVAL;
121 }
122 hid_sensor_power_state(&gyro_state->common_attributes, false);
123 ret_type = IIO_VAL_INT;
124 break;
125 case IIO_CHAN_INFO_SCALE:
126 *val = gyro_state->scale_pre_decml;
127 *val2 = gyro_state->scale_post_decml;
128 ret_type = gyro_state->scale_precision;
129 break;
130 case IIO_CHAN_INFO_OFFSET:
131 *val = gyro_state->value_offset;
132 ret_type = IIO_VAL_INT;
133 break;
134 case IIO_CHAN_INFO_SAMP_FREQ:
135 ret_type = hid_sensor_read_samp_freq_value(
136 &gyro_state->common_attributes, val, val2);
137 break;
138 case IIO_CHAN_INFO_HYSTERESIS:
139 ret_type = hid_sensor_read_raw_hyst_value(
140 &gyro_state->common_attributes, val, val2);
141 break;
142 default:
143 ret_type = -EINVAL;
144 break;
145 }
146
147 return ret_type;
148}
149
150
151static int gyro_3d_write_raw(struct iio_dev *indio_dev,
152 struct iio_chan_spec const *chan,
153 int val,
154 int val2,
155 long mask)
156{
157 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
158 int ret = 0;
159
160 switch (mask) {
161 case IIO_CHAN_INFO_SAMP_FREQ:
162 ret = hid_sensor_write_samp_freq_value(
163 &gyro_state->common_attributes, val, val2);
164 break;
165 case IIO_CHAN_INFO_HYSTERESIS:
166 ret = hid_sensor_write_raw_hyst_value(
167 &gyro_state->common_attributes, val, val2);
168 break;
169 default:
170 ret = -EINVAL;
171 }
172
173 return ret;
174}
175
176static const struct iio_info gyro_3d_info = {
177 .read_raw = &gyro_3d_read_raw,
178 .write_raw = &gyro_3d_write_raw,
179};
180
181
182static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
183 int len)
184{
185 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
186 iio_push_to_buffers(indio_dev, data);
187}
188
189
190static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
191 unsigned usage_id,
192 void *priv)
193{
194 struct iio_dev *indio_dev = platform_get_drvdata(priv);
195 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
196
197 dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
198 if (atomic_read(&gyro_state->common_attributes.data_ready))
199 hid_sensor_push_data(indio_dev,
200 gyro_state->gyro_val,
201 sizeof(gyro_state->gyro_val));
202
203 return 0;
204}
205
206
207static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
208 unsigned usage_id,
209 size_t raw_len, char *raw_data,
210 void *priv)
211{
212 struct iio_dev *indio_dev = platform_get_drvdata(priv);
213 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
214 int offset;
215 int ret = -EINVAL;
216
217 switch (usage_id) {
218 case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS:
219 case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
220 case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
221 offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
222 gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
223 *(u32 *)raw_data;
224 ret = 0;
225 break;
226 default:
227 break;
228 }
229
230 return ret;
231}
232
233
234static int gyro_3d_parse_report(struct platform_device *pdev,
235 struct hid_sensor_hub_device *hsdev,
236 struct iio_chan_spec *channels,
237 unsigned usage_id,
238 struct gyro_3d_state *st)
239{
240 int ret;
241 int i;
242
243 for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
244 ret = sensor_hub_input_get_attribute_info(hsdev,
245 HID_INPUT_REPORT,
246 usage_id,
247 HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i,
248 &st->gyro[CHANNEL_SCAN_INDEX_X + i]);
249 if (ret < 0)
250 break;
251 gyro_3d_adjust_channel_bit_mask(channels,
252 CHANNEL_SCAN_INDEX_X + i,
253 st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
254 }
255 dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
256 st->gyro[0].index,
257 st->gyro[0].report_id,
258 st->gyro[1].index, st->gyro[1].report_id,
259 st->gyro[2].index, st->gyro[2].report_id);
260
261 st->scale_precision = hid_sensor_format_scale(
262 HID_USAGE_SENSOR_GYRO_3D,
263 &st->gyro[CHANNEL_SCAN_INDEX_X],
264 &st->scale_pre_decml, &st->scale_post_decml);
265
266
267 if (st->common_attributes.sensitivity.index < 0) {
268 sensor_hub_input_get_attribute_info(hsdev,
269 HID_FEATURE_REPORT, usage_id,
270 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
271 HID_USAGE_SENSOR_DATA_ANGL_VELOCITY,
272 &st->common_attributes.sensitivity);
273 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
274 st->common_attributes.sensitivity.index,
275 st->common_attributes.sensitivity.report_id);
276 }
277 return ret;
278}
279
280
281static int hid_gyro_3d_probe(struct platform_device *pdev)
282{
283 int ret = 0;
284 static const char *name = "gyro_3d";
285 struct iio_dev *indio_dev;
286 struct gyro_3d_state *gyro_state;
287 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
288
289 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
290 if (!indio_dev)
291 return -ENOMEM;
292 platform_set_drvdata(pdev, indio_dev);
293
294 gyro_state = iio_priv(indio_dev);
295 gyro_state->common_attributes.hsdev = hsdev;
296 gyro_state->common_attributes.pdev = pdev;
297
298 ret = hid_sensor_parse_common_attributes(hsdev,
299 HID_USAGE_SENSOR_GYRO_3D,
300 &gyro_state->common_attributes);
301 if (ret) {
302 dev_err(&pdev->dev, "failed to setup common attributes\n");
303 return ret;
304 }
305
306 indio_dev->channels = kmemdup(gyro_3d_channels,
307 sizeof(gyro_3d_channels), GFP_KERNEL);
308 if (!indio_dev->channels) {
309 dev_err(&pdev->dev, "failed to duplicate channels\n");
310 return -ENOMEM;
311 }
312
313 ret = gyro_3d_parse_report(pdev, hsdev,
314 (struct iio_chan_spec *)indio_dev->channels,
315 HID_USAGE_SENSOR_GYRO_3D, gyro_state);
316 if (ret) {
317 dev_err(&pdev->dev, "failed to setup attributes\n");
318 goto error_free_dev_mem;
319 }
320
321 indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
322 indio_dev->info = &gyro_3d_info;
323 indio_dev->name = name;
324 indio_dev->modes = INDIO_DIRECT_MODE;
325
326 atomic_set(&gyro_state->common_attributes.data_ready, 0);
327
328 ret = hid_sensor_setup_trigger(indio_dev, name,
329 &gyro_state->common_attributes);
330 if (ret < 0) {
331 dev_err(&pdev->dev, "trigger setup failed\n");
332 goto error_free_dev_mem;
333 }
334
335 ret = iio_device_register(indio_dev);
336 if (ret) {
337 dev_err(&pdev->dev, "device register failed\n");
338 goto error_remove_trigger;
339 }
340
341 gyro_state->callbacks.send_event = gyro_3d_proc_event;
342 gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
343 gyro_state->callbacks.pdev = pdev;
344 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
345 &gyro_state->callbacks);
346 if (ret < 0) {
347 dev_err(&pdev->dev, "callback reg failed\n");
348 goto error_iio_unreg;
349 }
350
351 return ret;
352
353error_iio_unreg:
354 iio_device_unregister(indio_dev);
355error_remove_trigger:
356 hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
357error_free_dev_mem:
358 kfree(indio_dev->channels);
359 return ret;
360}
361
362
363static int hid_gyro_3d_remove(struct platform_device *pdev)
364{
365 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
366 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
367 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
368
369 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
370 iio_device_unregister(indio_dev);
371 hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
372 kfree(indio_dev->channels);
373
374 return 0;
375}
376
377static const struct platform_device_id hid_gyro_3d_ids[] = {
378 {
379
380 .name = "HID-SENSOR-200076",
381 },
382 { }
383};
384MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids);
385
386static struct platform_driver hid_gyro_3d_platform_driver = {
387 .id_table = hid_gyro_3d_ids,
388 .driver = {
389 .name = KBUILD_MODNAME,
390 .pm = &hid_sensor_pm_ops,
391 },
392 .probe = hid_gyro_3d_probe,
393 .remove = hid_gyro_3d_remove,
394};
395module_platform_driver(hid_gyro_3d_platform_driver);
396
397MODULE_DESCRIPTION("HID Sensor Gyroscope 3D");
398MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
399MODULE_LICENSE("GPL");
400
