Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Ye Xiang | 1684 | 96.12% | 2 | 22.22% |
Srinivas Pandruvada | 59 | 3.37% | 3 | 33.33% |
Andy Shevchenko | 5 | 0.29% | 1 | 11.11% |
Uwe Kleine-König | 2 | 0.11% | 1 | 11.11% |
Thomas Gleixner | 1 | 0.06% | 1 | 11.11% |
Jonathan Cameron | 1 | 0.06% | 1 | 11.11% |
Total | 1752 | 9 |
// SPDX-License-Identifier: GPL-2.0-only /* * HID Sensors Driver * Copyright (c) 2020, Intel Corporation. */ #include <linux/hid-sensor-hub.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/platform_device.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include "../common/hid-sensors/hid-sensor-trigger.h" enum hinge_channel { CHANNEL_SCAN_INDEX_HINGE_ANGLE, CHANNEL_SCAN_INDEX_SCREEN_ANGLE, CHANNEL_SCAN_INDEX_KEYBOARD_ANGLE, CHANNEL_SCAN_INDEX_MAX, }; #define CHANNEL_SCAN_INDEX_TIMESTAMP CHANNEL_SCAN_INDEX_MAX static const u32 hinge_addresses[CHANNEL_SCAN_INDEX_MAX] = { HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1), HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2), HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3) }; static const char *const hinge_labels[CHANNEL_SCAN_INDEX_MAX] = { "hinge", "screen", "keyboard" }; struct hinge_state { struct iio_dev *indio_dev; struct hid_sensor_hub_attribute_info hinge[CHANNEL_SCAN_INDEX_MAX]; struct hid_sensor_hub_callbacks callbacks; struct hid_sensor_common common_attributes; const char *labels[CHANNEL_SCAN_INDEX_MAX]; struct { u32 hinge_val[3]; u64 timestamp __aligned(8); } scan; int scale_pre_decml; int scale_post_decml; int scale_precision; int value_offset; u64 timestamp; }; static const u32 hinge_sensitivity_addresses[] = { HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1), }; /* Channel definitions */ static const struct iio_chan_spec hinge_channels[] = { { .type = IIO_ANGL, .indexed = 1, .channel = 0, .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_HINGE_ANGLE, .scan_type = { .sign = 's', .storagebits = 32, }, }, { .type = IIO_ANGL, .indexed = 1, .channel = 1, .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_SCREEN_ANGLE, .scan_type = { .sign = 's', .storagebits = 32, }, }, { .type = IIO_ANGL, .indexed = 1, .channel = 2, .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_KEYBOARD_ANGLE, .scan_type = { .sign = 's', .storagebits = 32, }, }, IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP) }; /* Adjust channel real bits based on report descriptor */ static void hinge_adjust_channel_realbits(struct iio_chan_spec *channels, int channel, int size) { channels[channel].scan_type.realbits = size * 8; } /* Channel read_raw handler */ static int hinge_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct hinge_state *st = iio_priv(indio_dev); struct hid_sensor_hub_device *hsdev; int report_id; s32 min; hsdev = st->common_attributes.hsdev; switch (mask) { case IIO_CHAN_INFO_RAW: hid_sensor_power_state(&st->common_attributes, true); report_id = st->hinge[chan->scan_index].report_id; min = st->hinge[chan->scan_index].logical_minimum; if (report_id < 0) { hid_sensor_power_state(&st->common_attributes, false); return -EINVAL; } *val = sensor_hub_input_attr_get_raw_value(st->common_attributes.hsdev, hsdev->usage, hinge_addresses[chan->scan_index], report_id, SENSOR_HUB_SYNC, min < 0); hid_sensor_power_state(&st->common_attributes, false); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = st->scale_pre_decml; *val2 = st->scale_post_decml; return st->scale_precision; case IIO_CHAN_INFO_OFFSET: *val = st->value_offset; return IIO_VAL_INT; case IIO_CHAN_INFO_SAMP_FREQ: return hid_sensor_read_samp_freq_value(&st->common_attributes, val, val2); case IIO_CHAN_INFO_HYSTERESIS: return hid_sensor_read_raw_hyst_value(&st->common_attributes, val, val2); default: return -EINVAL; } } /* Channel write_raw handler */ static int hinge_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { struct hinge_state *st = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: return hid_sensor_write_samp_freq_value(&st->common_attributes, val, val2); case IIO_CHAN_INFO_HYSTERESIS: return hid_sensor_write_raw_hyst_value(&st->common_attributes, val, val2); default: return -EINVAL; } } static int hinge_read_label(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, char *label) { struct hinge_state *st = iio_priv(indio_dev); return sprintf(label, "%s\n", st->labels[chan->channel]); } static const struct iio_info hinge_info = { .read_raw = hinge_read_raw, .write_raw = hinge_write_raw, .read_label = hinge_read_label, }; /* * Callback handler to send event after all samples are received * and captured. */ static int hinge_proc_event(struct hid_sensor_hub_device *hsdev, unsigned int usage_id, void *priv) { struct iio_dev *indio_dev = platform_get_drvdata(priv); struct hinge_state *st = iio_priv(indio_dev); if (atomic_read(&st->common_attributes.data_ready)) { if (!st->timestamp) st->timestamp = iio_get_time_ns(indio_dev); iio_push_to_buffers_with_timestamp(indio_dev, &st->scan, st->timestamp); st->timestamp = 0; } return 0; } /* Capture samples in local storage */ static int hinge_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned int usage_id, size_t raw_len, char *raw_data, void *priv) { struct iio_dev *indio_dev = platform_get_drvdata(priv); struct hinge_state *st = iio_priv(indio_dev); int offset; switch (usage_id) { case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1): case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2): case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3): offset = usage_id - HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1); st->scan.hinge_val[offset] = *(u32 *)raw_data; return 0; case HID_USAGE_SENSOR_TIME_TIMESTAMP: st->timestamp = hid_sensor_convert_timestamp(&st->common_attributes, *(int64_t *)raw_data); return 0; default: return -EINVAL; } } /* Parse report which is specific to an usage id */ static int hinge_parse_report(struct platform_device *pdev, struct hid_sensor_hub_device *hsdev, struct iio_chan_spec *channels, unsigned int usage_id, struct hinge_state *st) { int ret; int i; for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; ++i) { ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT, usage_id, hinge_addresses[i], &st->hinge[i]); if (ret < 0) return ret; hinge_adjust_channel_realbits(channels, i, st->hinge[i].size); } st->scale_precision = hid_sensor_format_scale(HID_USAGE_SENSOR_HINGE, &st->hinge[CHANNEL_SCAN_INDEX_HINGE_ANGLE], &st->scale_pre_decml, &st->scale_post_decml); return ret; } /* Function to initialize the processing for usage id */ static int hid_hinge_probe(struct platform_device *pdev) { struct hinge_state *st; struct iio_dev *indio_dev; struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; int ret; int i; indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); if (!indio_dev) return -ENOMEM; platform_set_drvdata(pdev, indio_dev); st = iio_priv(indio_dev); st->common_attributes.hsdev = hsdev; st->common_attributes.pdev = pdev; st->indio_dev = indio_dev; for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; i++) st->labels[i] = hinge_labels[i]; ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage, &st->common_attributes, hinge_sensitivity_addresses, ARRAY_SIZE(hinge_sensitivity_addresses)); if (ret) { dev_err(&pdev->dev, "failed to setup common attributes\n"); return ret; } indio_dev->num_channels = ARRAY_SIZE(hinge_channels); indio_dev->channels = devm_kmemdup(&indio_dev->dev, hinge_channels, sizeof(hinge_channels), GFP_KERNEL); if (!indio_dev->channels) return -ENOMEM; ret = hinge_parse_report(pdev, hsdev, (struct iio_chan_spec *)indio_dev->channels, hsdev->usage, st); if (ret) { dev_err(&pdev->dev, "failed to setup attributes\n"); return ret; } indio_dev->info = &hinge_info; indio_dev->name = "hinge"; indio_dev->modes = INDIO_DIRECT_MODE; atomic_set(&st->common_attributes.data_ready, 0); ret = hid_sensor_setup_trigger(indio_dev, indio_dev->name, &st->common_attributes); if (ret < 0) { dev_err(&pdev->dev, "trigger setup failed\n"); return ret; } st->callbacks.send_event = hinge_proc_event; st->callbacks.capture_sample = hinge_capture_sample; st->callbacks.pdev = pdev; ret = sensor_hub_register_callback(hsdev, hsdev->usage, &st->callbacks); if (ret < 0) { dev_err(&pdev->dev, "callback reg failed\n"); goto error_remove_trigger; } ret = iio_device_register(indio_dev); if (ret) { dev_err(&pdev->dev, "device register failed\n"); goto error_remove_callback; } return ret; error_remove_callback: sensor_hub_remove_callback(hsdev, hsdev->usage); error_remove_trigger: hid_sensor_remove_trigger(indio_dev, &st->common_attributes); return ret; } /* Function to deinitialize the processing for usage id */ static void hid_hinge_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 hinge_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); sensor_hub_remove_callback(hsdev, hsdev->usage); hid_sensor_remove_trigger(indio_dev, &st->common_attributes); } static const struct platform_device_id hid_hinge_ids[] = { { /* Format: HID-SENSOR-INT-usage_id_in_hex_lowercase */ .name = "HID-SENSOR-INT-020b", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, hid_hinge_ids); static struct platform_driver hid_hinge_platform_driver = { .id_table = hid_hinge_ids, .driver = { .name = KBUILD_MODNAME, .pm = &hid_sensor_pm_ops, }, .probe = hid_hinge_probe, .remove_new = hid_hinge_remove, }; module_platform_driver(hid_hinge_platform_driver); MODULE_DESCRIPTION("HID Sensor INTEL Hinge"); MODULE_AUTHOR("Ye Xiang <xiang.ye@intel.com>"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(IIO_HID);
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