From patchwork Sat Feb 4 13:47:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Song, Hongyan" X-Patchwork-Id: 9555505 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 56EE5602B7 for ; Sat, 4 Feb 2017 05:25:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 263B828111 for ; Sat, 4 Feb 2017 05:25:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 166CE2815E; Sat, 4 Feb 2017 05:25:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F09AA28111 for ; Sat, 4 Feb 2017 05:25:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753671AbdBDFZE (ORCPT ); Sat, 4 Feb 2017 00:25:04 -0500 Received: from mga03.intel.com ([134.134.136.65]:25102 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753632AbdBDFZD (ORCPT ); Sat, 4 Feb 2017 00:25:03 -0500 Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga103.jf.intel.com with ESMTP; 03 Feb 2017 21:25:02 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,332,1477983600"; d="scan'208";a="60727351" Received: from shsensorbuild.sh.intel.com ([10.239.133.27]) by orsmga005.jf.intel.com with ESMTP; 03 Feb 2017 21:25:00 -0800 From: Song Hongyan To: linux-input@vger.kernel.org, linux-iio@vger.kernel.org Cc: jikos@kernel.org, jic23@kernel.org, srinivas.pandruvada@intel.com, Song Hongyan Subject: [PATCH] iio: hid: Add temperature sensor support Date: Sat, 4 Feb 2017 21:47:39 +0800 Message-Id: <1486216059-9310-1-git-send-email-hongyan.song@intel.com> X-Mailer: git-send-email 1.9.1 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Environmental temperature sensor is a hid defined sensor, it measures temperature. More information can be found in: http://www.usb.org/developers/hidpage/HUTRR39b.pdf According to IIO ABI definition, IIO_TEMP data output unit is milli degrees Celsius. Add the unit convert from degree to milli degree. Signed-off-by: Song Hongyan --- .../iio/common/hid-sensors/hid-sensor-attributes.c | 3 + drivers/iio/temperature/Kconfig | 14 + drivers/iio/temperature/Makefile | 1 + drivers/iio/temperature/hid-sensor-temperature.c | 332 +++++++++++++++++++++ include/linux/hid-sensor-ids.h | 4 + 5 files changed, 354 insertions(+) create mode 100644 drivers/iio/temperature/hid-sensor-temperature.c diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c index 7ef94a9..68c2bb0 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -58,6 +58,9 @@ {HID_USAGE_SENSOR_PRESSURE, 0, 100, 0}, {HID_USAGE_SENSOR_PRESSURE, HID_USAGE_SENSOR_UNITS_PASCAL, 0, 1000000}, + + {HID_USAGE_SENSOR_TEMPERATURE, 0, 1000, 0}, + {HID_USAGE_SENSOR_TEMPERATURE, HID_USAGE_SENSOR_UNITS_DEGREES, 1000, 0}, }; static int pow_10(unsigned power) diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig index 5ea77a7..5f7b9f7 100644 --- a/drivers/iio/temperature/Kconfig +++ b/drivers/iio/temperature/Kconfig @@ -19,6 +19,20 @@ config MAXIM_THERMOCOUPLE This driver can also be built as a module. If so, the module will be called maxim_thermocouple. +config HID_SENSOR_TEMP + tristate "HID Environmental temperature sensor" + depends on HID_SENSOR_HUB + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + select HID_SENSOR_IIO_COMMON + select HID_SENSOR_IIO_TRIGGER + help + Say yes here to build support for the HID SENSOR + temperature driver + + To compile this driver as a module, choose M here: the module + will be called hid-sensor-temperature. + config MLX90614 tristate "MLX90614 contact-less infrared sensor" depends on I2C diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile index 78c3de0..e157eda 100644 --- a/drivers/iio/temperature/Makefile +++ b/drivers/iio/temperature/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_MLX90614) += mlx90614.o obj-$(CONFIG_TMP006) += tmp006.o obj-$(CONFIG_TSYS01) += tsys01.o obj-$(CONFIG_TSYS02D) += tsys02d.o +obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o diff --git a/drivers/iio/temperature/hid-sensor-temperature.c b/drivers/iio/temperature/hid-sensor-temperature.c new file mode 100644 index 0000000..3b64c73 --- /dev/null +++ b/drivers/iio/temperature/hid-sensor-temperature.c @@ -0,0 +1,332 @@ +/* HID Sensors Driver + * Copyright (c) 2017, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include "../common/hid-sensors/hid-sensor-trigger.h" + +#define CHANNEL_SCAN_INDEX_TEMPERATURE 0 + +struct temperature_state { + struct hid_sensor_hub_callbacks callbacks; + struct hid_sensor_common common_attributes; + struct hid_sensor_hub_attribute_info temperature_attr; + s32 temperature_data; + int scale_pre_decml; + int scale_post_decml; + int scale_precision; + int value_offset; +}; + +/* Channel definitions */ +static const struct iio_chan_spec temperature_channels[] = { + { + .type = IIO_TEMP, + .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_TEMPERATURE, + } +}; + +/* Adjust channel real bits based on report descriptor */ +static void temperature_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 s32 */ + channels[channel].scan_type.storagebits = sizeof(s32) * 8; +} + +/* Channel read_raw handler */ +static int temperature_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct temperature_state *temperature_state = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (chan->type == IIO_TEMP) { + hid_sensor_power_state( + &temperature_state->common_attributes, true); + *val = sensor_hub_input_attr_get_raw_value( + temperature_state->common_attributes.hsdev, + HID_USAGE_SENSOR_TEMPERATURE, + HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE, + temperature_state->temperature_attr.report_id, + SENSOR_HUB_SYNC); + hid_sensor_power_state( + &temperature_state->common_attributes, + false); + } + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + *val = temperature_state->scale_pre_decml; + *val2 = temperature_state->scale_post_decml; + ret = temperature_state->scale_precision; + break; + case IIO_CHAN_INFO_OFFSET: + *val = temperature_state->value_offset; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_read_samp_freq_value( + &temperature_state->common_attributes, + val, val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_read_raw_hyst_value( + &temperature_state->common_attributes, + val, val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +/* Channel write_raw handler */ +static int temperature_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct temperature_state *temperature_state = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + ret = hid_sensor_write_samp_freq_value( + &temperature_state->common_attributes, val, + val2); + break; + case IIO_CHAN_INFO_HYSTERESIS: + ret = hid_sensor_write_raw_hyst_value( + &temperature_state->common_attributes, val, + val2); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct iio_info temperature_info = { + .driver_module = THIS_MODULE, + .read_raw = &temperature_read_raw, + .write_raw = &temperature_write_raw, +}; + +/* Function to push data to buffer */ +static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data, + int len) +{ + iio_push_to_buffers(indio_dev, data); +} + +/* Callback handler to send event after all samples are received and captured */ +static int temperature_proc_event(struct hid_sensor_hub_device *hsdev, + unsigned int usage_id, + void *priv) +{ + struct iio_dev *indio_dev = platform_get_drvdata(priv); + struct temperature_state *temperature_state = iio_priv(indio_dev); + + if (atomic_read(&temperature_state->common_attributes.data_ready)) + hid_sensor_push_data(indio_dev, + &temperature_state->temperature_data, + sizeof(temperature_state->temperature_data)); + + return 0; +} + +/* Capture samples in local storage */ +static int temperature_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 temperature_state *temperature_state = iio_priv(indio_dev); + + switch (usage_id) { + case HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE: + temperature_state->temperature_data = *(s32 *)raw_data; + return 0; + default: + return -EINVAL; + } +} + +/* Parse report which is specific to an usage id*/ +static int temperature_parse_report(struct platform_device *pdev, + struct hid_sensor_hub_device *hsdev, + struct iio_chan_spec *channels, + unsigned int usage_id, + struct temperature_state *st) +{ + int ret; + + ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT, + usage_id, + HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE, + &st->temperature_attr); + if (ret < 0) + return ret; + + temperature_adjust_channel_bit_mask(channels, + CHANNEL_SCAN_INDEX_TEMPERATURE, + st->temperature_attr.size); + + st->scale_precision = hid_sensor_format_scale( + HID_USAGE_SENSOR_TEMPERATURE, + &st->temperature_attr, + &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_ENVIRONMENTAL_TEMPERATURE, + &st->common_attributes.sensitivity); + return ret; +} + +/* Function to initialize the processing for usage id */ +static int hid_temperature_probe(struct platform_device *pdev) +{ + static const char *name = "temperature"; + struct iio_dev *indio_dev; + struct temperature_state *temperature_state; + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, + sizeof(struct temperature_state)); + if (!indio_dev) + return -ENOMEM; + + temperature_state = iio_priv(indio_dev); + temperature_state->common_attributes.hsdev = hsdev; + temperature_state->common_attributes.pdev = pdev; + + ret = hid_sensor_parse_common_attributes(hsdev, + HID_USAGE_SENSOR_TEMPERATURE, + &temperature_state->common_attributes); + if (ret) + return ret; + + indio_dev->channels = devm_kmemdup(&indio_dev->dev, + temperature_channels, + sizeof(temperature_channels), + GFP_KERNEL); + if (!indio_dev->channels) + return -ENOMEM; + + ret = temperature_parse_report(pdev, hsdev, + (struct iio_chan_spec *)indio_dev->channels, + HID_USAGE_SENSOR_TEMPERATURE, + temperature_state); + if (ret) + return ret; + + indio_dev->num_channels = ARRAY_SIZE(temperature_channels); + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &temperature_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) + return ret; + + atomic_set(&temperature_state->common_attributes.data_ready, 0); + ret = hid_sensor_setup_trigger(indio_dev, name, + &temperature_state->common_attributes); + if (ret) + goto error_unreg_buffer_funcs; + + ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); + if (ret) + goto error_unreg_buffer_funcs; + + platform_set_drvdata(pdev, indio_dev); + + temperature_state->callbacks.send_event = temperature_proc_event; + temperature_state->callbacks.capture_sample = + temperature_capture_sample; + temperature_state->callbacks.pdev = pdev; + ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_TEMPERATURE, + &temperature_state->callbacks); + return ret; + +error_unreg_buffer_funcs: + iio_triggered_buffer_cleanup(indio_dev); + return ret; +} + +/* Function to deinitialize the processing for usage id */ +static int hid_temperature_remove(struct platform_device *pdev) +{ + struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + + sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TEMPERATURE); + + return 0; +} + +static const struct platform_device_id hid_temperature_ids[] = { + { + /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ + .name = "HID-SENSOR-200033", + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, hid_temperature_ids); + +static struct platform_driver hid_temperature_platform_driver = { + .id_table = hid_temperature_ids, + .driver = { + .name = KBUILD_MODNAME, + .pm = &hid_sensor_pm_ops, + }, + .probe = hid_temperature_probe, + .remove = hid_temperature_remove, +}; +module_platform_driver(hid_temperature_platform_driver); + +MODULE_DESCRIPTION("HID Environmental temperature sensor"); +MODULE_AUTHOR("Song Hongyan "); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h index bab8375..ecec978 100644 --- a/include/linux/hid-sensor-ids.h +++ b/include/linux/hid-sensor-ids.h @@ -45,6 +45,10 @@ #define HID_USAGE_SENSOR_DATA_ATMOSPHERIC_PRESSURE 0x200430 #define HID_USAGE_SENSOR_ATMOSPHERIC_PRESSURE 0x200431 +/* Tempreture (200033) */ +#define HID_USAGE_SENSOR_TEMPERATURE 0x200033 +#define HID_USAGE_SENSOR_DATA_ENVIRONMENTAL_TEMPERATURE 0x200434 + /* Gyro 3D: (200076) */ #define HID_USAGE_SENSOR_GYRO_3D 0x200076 #define HID_USAGE_SENSOR_DATA_ANGL_VELOCITY 0x200456