Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Srinivas Pandruvada | 1677 | 92.14% | 8 | 40.00% |
Jonathan Cameron | 52 | 2.86% | 2 | 10.00% |
Alexander Holler | 34 | 1.87% | 2 | 10.00% |
Sachin Kamat | 20 | 1.10% | 2 | 10.00% |
Hans de Goede | 20 | 1.10% | 1 | 5.00% |
Fabio Estevam | 11 | 0.60% | 1 | 5.00% |
Thomas Gleixner | 2 | 0.11% | 1 | 5.00% |
Lars-Peter Clausen | 2 | 0.11% | 1 | 5.00% |
rodrigosiqueira | 1 | 0.05% | 1 | 5.00% |
Krzysztof Kozlowski | 1 | 0.05% | 1 | 5.00% |
Total | 1820 | 20 |
// SPDX-License-Identifier: GPL-2.0-only /* * HID Sensors Driver * Copyright (c) 2012, Intel Corporation. */ #include <linux/device.h> #include <linux/platform_device.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/hid-sensor-hub.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include "../common/hid-sensors/hid-sensor-trigger.h" enum gyro_3d_channel { CHANNEL_SCAN_INDEX_X, CHANNEL_SCAN_INDEX_Y, CHANNEL_SCAN_INDEX_Z, GYRO_3D_CHANNEL_MAX, }; struct gyro_3d_state { struct hid_sensor_hub_callbacks callbacks; struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX]; u32 gyro_val[GYRO_3D_CHANNEL_MAX]; int scale_pre_decml; int scale_post_decml; int scale_precision; int value_offset; }; static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = { HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS, HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS, HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS }; /* Channel definitions */ static const struct iio_chan_spec gyro_3d_channels[] = { { .type = IIO_ANGL_VEL, .modified = 1, .channel2 = IIO_MOD_X, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS), .scan_index = CHANNEL_SCAN_INDEX_X, }, { .type = IIO_ANGL_VEL, .modified = 1, .channel2 = IIO_MOD_Y, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS), .scan_index = CHANNEL_SCAN_INDEX_Y, }, { .type = IIO_ANGL_VEL, .modified = 1, .channel2 = IIO_MOD_Z, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_HYSTERESIS), .scan_index = CHANNEL_SCAN_INDEX_Z, } }; /* Adjust channel real bits based on report descriptor */ static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, int channel, int size) { channels[channel].scan_type.sign = 's'; /* Real storage bits will change based on the report desc. */ channels[channel].scan_type.realbits = size * 8; /* Maximum size of a sample to capture is u32 */ channels[channel].scan_type.storagebits = sizeof(u32) * 8; } /* Channel read_raw handler */ static int gyro_3d_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct gyro_3d_state *gyro_state = iio_priv(indio_dev); int report_id = -1; u32 address; int ret_type; s32 min; *val = 0; *val2 = 0; switch (mask) { case IIO_CHAN_INFO_RAW: hid_sensor_power_state(&gyro_state->common_attributes, true); report_id = gyro_state->gyro[chan->scan_index].report_id; min = gyro_state->gyro[chan->scan_index].logical_minimum; address = gyro_3d_addresses[chan->scan_index]; if (report_id >= 0) *val = sensor_hub_input_attr_get_raw_value( gyro_state->common_attributes.hsdev, HID_USAGE_SENSOR_GYRO_3D, address, report_id, SENSOR_HUB_SYNC, min < 0); else { *val = 0; hid_sensor_power_state(&gyro_state->common_attributes, false); return -EINVAL; } hid_sensor_power_state(&gyro_state->common_attributes, false); ret_type = IIO_VAL_INT; break; case IIO_CHAN_INFO_SCALE: *val = gyro_state->scale_pre_decml; *val2 = gyro_state->scale_post_decml; ret_type = gyro_state->scale_precision; break; case IIO_CHAN_INFO_OFFSET: *val = gyro_state->value_offset; ret_type = IIO_VAL_INT; break; case IIO_CHAN_INFO_SAMP_FREQ: ret_type = hid_sensor_read_samp_freq_value( &gyro_state->common_attributes, val, val2); break; case IIO_CHAN_INFO_HYSTERESIS: ret_type = hid_sensor_read_raw_hyst_value( &gyro_state->common_attributes, val, val2); break; default: ret_type = -EINVAL; break; } return ret_type; } /* Channel write_raw handler */ static int gyro_3d_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { struct gyro_3d_state *gyro_state = iio_priv(indio_dev); int ret = 0; switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: ret = hid_sensor_write_samp_freq_value( &gyro_state->common_attributes, val, val2); break; case IIO_CHAN_INFO_HYSTERESIS: ret = hid_sensor_write_raw_hyst_value( &gyro_state->common_attributes, val, val2); break; default: ret = -EINVAL; } return ret; } static const struct iio_info gyro_3d_info = { .read_raw = &gyro_3d_read_raw, .write_raw = &gyro_3d_write_raw, }; /* Function to push data to buffer */ static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data, int len) { dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); iio_push_to_buffers(indio_dev, data); } /* Callback handler to send event after all samples are received and captured */ static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev, unsigned usage_id, void *priv) { struct iio_dev *indio_dev = platform_get_drvdata(priv); struct gyro_3d_state *gyro_state = iio_priv(indio_dev); dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n"); if (atomic_read(&gyro_state->common_attributes.data_ready)) hid_sensor_push_data(indio_dev, gyro_state->gyro_val, sizeof(gyro_state->gyro_val)); return 0; } /* Capture samples in local storage */ static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned usage_id, size_t raw_len, char *raw_data, void *priv) { struct iio_dev *indio_dev = platform_get_drvdata(priv); struct gyro_3d_state *gyro_state = iio_priv(indio_dev); int offset; int ret = -EINVAL; switch (usage_id) { case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS: case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS: case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS: offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS; gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] = *(u32 *)raw_data; ret = 0; break; default: break; } return ret; } /* Parse report which is specific to an usage id*/ static int gyro_3d_parse_report(struct platform_device *pdev, struct hid_sensor_hub_device *hsdev, struct iio_chan_spec *channels, unsigned usage_id, struct gyro_3d_state *st) { int ret; int i; for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT, usage_id, HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i, &st->gyro[CHANNEL_SCAN_INDEX_X + i]); if (ret < 0) break; gyro_3d_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_X + i, st->gyro[CHANNEL_SCAN_INDEX_X + i].size); } dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n", st->gyro[0].index, st->gyro[0].report_id, st->gyro[1].index, st->gyro[1].report_id, st->gyro[2].index, st->gyro[2].report_id); st->scale_precision = hid_sensor_format_scale( HID_USAGE_SENSOR_GYRO_3D, &st->gyro[CHANNEL_SCAN_INDEX_X], &st->scale_pre_decml, &st->scale_post_decml); /* Set Sensitivity field ids, when there is no individual modifier */ if (st->common_attributes.sensitivity.index < 0) { sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, usage_id, HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS | HID_USAGE_SENSOR_DATA_ANGL_VELOCITY, &st->common_attributes.sensitivity); dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n", st->common_attributes.sensitivity.index, st->common_attributes.sensitivity.report_id); } return ret; } /* Function to initialize the processing for usage id */ static int hid_gyro_3d_probe(struct platform_device *pdev) { int ret = 0; static const char *name = "gyro_3d"; struct iio_dev *indio_dev; struct gyro_3d_state *gyro_state; struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state)); if (!indio_dev) return -ENOMEM; platform_set_drvdata(pdev, indio_dev); gyro_state = iio_priv(indio_dev); gyro_state->common_attributes.hsdev = hsdev; gyro_state->common_attributes.pdev = pdev; ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_GYRO_3D, &gyro_state->common_attributes); if (ret) { dev_err(&pdev->dev, "failed to setup common attributes\n"); return ret; } indio_dev->channels = kmemdup(gyro_3d_channels, sizeof(gyro_3d_channels), GFP_KERNEL); if (!indio_dev->channels) { dev_err(&pdev->dev, "failed to duplicate channels\n"); return -ENOMEM; } ret = gyro_3d_parse_report(pdev, hsdev, (struct iio_chan_spec *)indio_dev->channels, HID_USAGE_SENSOR_GYRO_3D, gyro_state); if (ret) { dev_err(&pdev->dev, "failed to setup attributes\n"); goto error_free_dev_mem; } indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels); indio_dev->dev.parent = &pdev->dev; indio_dev->info = &gyro_3d_info; indio_dev->name = name; indio_dev->modes = INDIO_DIRECT_MODE; ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, NULL, NULL); if (ret) { dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); goto error_free_dev_mem; } atomic_set(&gyro_state->common_attributes.data_ready, 0); ret = hid_sensor_setup_trigger(indio_dev, name, &gyro_state->common_attributes); if (ret < 0) { dev_err(&pdev->dev, "trigger setup failed\n"); goto error_unreg_buffer_funcs; } ret = iio_device_register(indio_dev); if (ret) { dev_err(&pdev->dev, "device register failed\n"); goto error_remove_trigger; } gyro_state->callbacks.send_event = gyro_3d_proc_event; gyro_state->callbacks.capture_sample = gyro_3d_capture_sample; gyro_state->callbacks.pdev = pdev; ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D, &gyro_state->callbacks); if (ret < 0) { dev_err(&pdev->dev, "callback reg failed\n"); goto error_iio_unreg; } return ret; error_iio_unreg: iio_device_unregister(indio_dev); error_remove_trigger: hid_sensor_remove_trigger(&gyro_state->common_attributes); error_unreg_buffer_funcs: iio_triggered_buffer_cleanup(indio_dev); error_free_dev_mem: kfree(indio_dev->channels); return ret; } /* Function to deinitialize the processing for usage id */ static int hid_gyro_3d_remove(struct platform_device *pdev) { struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; struct iio_dev *indio_dev = platform_get_drvdata(pdev); struct gyro_3d_state *gyro_state = iio_priv(indio_dev); sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D); iio_device_unregister(indio_dev); hid_sensor_remove_trigger(&gyro_state->common_attributes); iio_triggered_buffer_cleanup(indio_dev); kfree(indio_dev->channels); return 0; } static const struct platform_device_id hid_gyro_3d_ids[] = { { /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ .name = "HID-SENSOR-200076", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids); static struct platform_driver hid_gyro_3d_platform_driver = { .id_table = hid_gyro_3d_ids, .driver = { .name = KBUILD_MODNAME, .pm = &hid_sensor_pm_ops, }, .probe = hid_gyro_3d_probe, .remove = hid_gyro_3d_remove, }; module_platform_driver(hid_gyro_3d_platform_driver); MODULE_DESCRIPTION("HID Sensor Gyroscope 3D"); MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); MODULE_LICENSE("GPL");
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