diff options
Diffstat (limited to 'drivers/iio/common/hid-sensors')
| -rw-r--r-- | drivers/iio/common/hid-sensors/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/iio/common/hid-sensors/Makefile | 8 | ||||
| -rw-r--r-- | drivers/iio/common/hid-sensors/hid-sensor-attributes.c | 514 | ||||
| -rw-r--r-- | drivers/iio/common/hid-sensors/hid-sensor-trigger.c | 336 | ||||
| -rw-r--r-- | drivers/iio/common/hid-sensors/hid-sensor-trigger.h | 20 |
5 files changed, 908 insertions, 0 deletions
diff --git a/drivers/iio/common/hid-sensors/Kconfig b/drivers/iio/common/hid-sensors/Kconfig new file mode 100644 index 000000000..2a3dd3b90 --- /dev/null +++ b/drivers/iio/common/hid-sensors/Kconfig @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Hid Sensor common modules +# +menu "Hid Sensor IIO Common" + +config HID_SENSOR_IIO_COMMON + tristate "Common modules for all HID Sensor IIO drivers" + depends on HID_SENSOR_HUB + select HID_SENSOR_IIO_TRIGGER if IIO_BUFFER + help + Say yes here to build support for HID sensor to use + HID sensor common processing for attributes and IIO triggers. + There are many attributes which can be shared among multiple + HID sensor drivers, this module contains processing for those + attributes. + +config HID_SENSOR_IIO_TRIGGER + tristate "Common module (trigger) for all HID Sensor IIO drivers" + depends on HID_SENSOR_HUB && HID_SENSOR_IIO_COMMON && IIO_BUFFER + select IIO_TRIGGER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build trigger support for HID sensors. + Triggers will be send if all requested attributes were read. + + If this driver is compiled as a module, it will be named + hid-sensor-trigger. + +endmenu diff --git a/drivers/iio/common/hid-sensors/Makefile b/drivers/iio/common/hid-sensors/Makefile new file mode 100644 index 000000000..64b01a81f --- /dev/null +++ b/drivers/iio/common/hid-sensors/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the Hid sensor common modules. +# + +obj-$(CONFIG_HID_SENSOR_IIO_COMMON) += hid-sensor-iio-common.o +obj-$(CONFIG_HID_SENSOR_IIO_TRIGGER) += hid-sensor-trigger.o +hid-sensor-iio-common-y := hid-sensor-attributes.o diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c new file mode 100644 index 000000000..442ff787f --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -0,0 +1,514 @@ +// 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/kernel.h> +#include <linux/slab.h> +#include <linux/time.h> + +#include <linux/hid-sensor-hub.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define HZ_PER_MHZ 1000000L + +static struct { + u32 usage_id; + int unit; /* 0 for default others from HID sensor spec */ + int scale_val0; /* scale, whole number */ + int scale_val1; /* scale, fraction in nanos */ +} unit_conversion[] = { + {HID_USAGE_SENSOR_ACCEL_3D, 0, 9, 806650000}, + {HID_USAGE_SENSOR_ACCEL_3D, + HID_USAGE_SENSOR_UNITS_METERS_PER_SEC_SQRD, 1, 0}, + {HID_USAGE_SENSOR_ACCEL_3D, + HID_USAGE_SENSOR_UNITS_G, 9, 806650000}, + + {HID_USAGE_SENSOR_GRAVITY_VECTOR, 0, 9, 806650000}, + {HID_USAGE_SENSOR_GRAVITY_VECTOR, + HID_USAGE_SENSOR_UNITS_METERS_PER_SEC_SQRD, 1, 0}, + {HID_USAGE_SENSOR_GRAVITY_VECTOR, + HID_USAGE_SENSOR_UNITS_G, 9, 806650000}, + + {HID_USAGE_SENSOR_GYRO_3D, 0, 0, 17453293}, + {HID_USAGE_SENSOR_GYRO_3D, + HID_USAGE_SENSOR_UNITS_RADIANS_PER_SECOND, 1, 0}, + {HID_USAGE_SENSOR_GYRO_3D, + HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND, 0, 17453293}, + + {HID_USAGE_SENSOR_COMPASS_3D, 0, 0, 1000000}, + {HID_USAGE_SENSOR_COMPASS_3D, HID_USAGE_SENSOR_UNITS_GAUSS, 1, 0}, + + {HID_USAGE_SENSOR_INCLINOMETER_3D, 0, 0, 17453293}, + {HID_USAGE_SENSOR_INCLINOMETER_3D, + HID_USAGE_SENSOR_UNITS_DEGREES, 0, 17453293}, + {HID_USAGE_SENSOR_INCLINOMETER_3D, + HID_USAGE_SENSOR_UNITS_RADIANS, 1, 0}, + + {HID_USAGE_SENSOR_ALS, 0, 1, 0}, + {HID_USAGE_SENSOR_ALS, HID_USAGE_SENSOR_UNITS_LUX, 1, 0}, + + {HID_USAGE_SENSOR_PRESSURE, 0, 100, 0}, + {HID_USAGE_SENSOR_PRESSURE, HID_USAGE_SENSOR_UNITS_PASCAL, 0, 1000000}, + + {HID_USAGE_SENSOR_TIME_TIMESTAMP, 0, 1000000000, 0}, + {HID_USAGE_SENSOR_TIME_TIMESTAMP, HID_USAGE_SENSOR_UNITS_MILLISECOND, + 1000000, 0}, + + {HID_USAGE_SENSOR_DEVICE_ORIENTATION, 0, 1, 0}, + + {HID_USAGE_SENSOR_RELATIVE_ORIENTATION, 0, 1, 0}, + + {HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION, 0, 1, 0}, + + {HID_USAGE_SENSOR_TEMPERATURE, 0, 1000, 0}, + {HID_USAGE_SENSOR_TEMPERATURE, HID_USAGE_SENSOR_UNITS_DEGREES, 1000, 0}, + + {HID_USAGE_SENSOR_HUMIDITY, 0, 1000, 0}, +}; + +static void simple_div(int dividend, int divisor, int *whole, + int *micro_frac) +{ + int rem; + int exp = 0; + + *micro_frac = 0; + if (divisor == 0) { + *whole = 0; + return; + } + *whole = dividend/divisor; + rem = dividend % divisor; + if (rem) { + while (rem <= divisor) { + rem *= 10; + exp++; + } + *micro_frac = (rem / divisor) * int_pow(10, 6 - exp); + } +} + +static void split_micro_fraction(unsigned int no, int exp, int *val1, int *val2) +{ + int divisor = int_pow(10, exp); + + *val1 = no / divisor; + *val2 = no % divisor * int_pow(10, 6 - exp); +} + +/* +VTF format uses exponent and variable size format. +For example if the size is 2 bytes +0x0067 with VTF16E14 format -> +1.03 +To convert just change to 0x67 to decimal and use two decimal as E14 stands +for 10^-2. +Negative numbers are 2's complement +*/ +static void convert_from_vtf_format(u32 value, int size, int exp, + int *val1, int *val2) +{ + int sign = 1; + + if (value & BIT(size*8 - 1)) { + value = ((1LL << (size * 8)) - value); + sign = -1; + } + exp = hid_sensor_convert_exponent(exp); + if (exp >= 0) { + *val1 = sign * value * int_pow(10, exp); + *val2 = 0; + } else { + split_micro_fraction(value, -exp, val1, val2); + if (*val1) + *val1 = sign * (*val1); + else + *val2 = sign * (*val2); + } +} + +static u32 convert_to_vtf_format(int size, int exp, int val1, int val2) +{ + int divisor; + u32 value; + int sign = 1; + + if (val1 < 0 || val2 < 0) + sign = -1; + exp = hid_sensor_convert_exponent(exp); + if (exp < 0) { + divisor = int_pow(10, 6 + exp); + value = abs(val1) * int_pow(10, -exp); + value += abs(val2) / divisor; + } else { + divisor = int_pow(10, exp); + value = abs(val1) / divisor; + } + if (sign < 0) + value = ((1LL << (size * 8)) - value); + + return value; +} + +s32 hid_sensor_read_poll_value(struct hid_sensor_common *st) +{ + s32 value = 0; + int ret; + + ret = sensor_hub_get_feature(st->hsdev, + st->poll.report_id, + st->poll.index, sizeof(value), &value); + + if (ret < 0 || value < 0) { + return -EINVAL; + } else { + if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND) + value = value * 1000; + } + + return value; +} +EXPORT_SYMBOL(hid_sensor_read_poll_value); + +int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st, + int *val1, int *val2) +{ + s32 value; + int ret; + + ret = sensor_hub_get_feature(st->hsdev, + st->poll.report_id, + st->poll.index, sizeof(value), &value); + if (ret < 0 || value < 0) { + *val1 = *val2 = 0; + return -EINVAL; + } else { + if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND) + simple_div(1000, value, val1, val2); + else if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND) + simple_div(1, value, val1, val2); + else { + *val1 = *val2 = 0; + return -EINVAL; + } + } + + return IIO_VAL_INT_PLUS_MICRO; +} +EXPORT_SYMBOL(hid_sensor_read_samp_freq_value); + +int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st, + int val1, int val2) +{ + s32 value; + int ret; + + if (val1 < 0 || val2 < 0) + return -EINVAL; + + value = val1 * HZ_PER_MHZ + val2; + if (value) { + if (st->poll.units == HID_USAGE_SENSOR_UNITS_MILLISECOND) + value = NSEC_PER_SEC / value; + else if (st->poll.units == HID_USAGE_SENSOR_UNITS_SECOND) + value = USEC_PER_SEC / value; + else + value = 0; + } + ret = sensor_hub_set_feature(st->hsdev, st->poll.report_id, + st->poll.index, sizeof(value), &value); + if (ret < 0 || value < 0) + return -EINVAL; + + ret = sensor_hub_get_feature(st->hsdev, + st->poll.report_id, + st->poll.index, sizeof(value), &value); + if (ret < 0 || value < 0) + return -EINVAL; + + st->poll_interval = value; + + return 0; +} +EXPORT_SYMBOL(hid_sensor_write_samp_freq_value); + +int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st, + int *val1, int *val2) +{ + s32 value; + int ret; + + ret = sensor_hub_get_feature(st->hsdev, + st->sensitivity.report_id, + st->sensitivity.index, sizeof(value), + &value); + if (ret < 0 || value < 0) { + *val1 = *val2 = 0; + return -EINVAL; + } else { + convert_from_vtf_format(value, st->sensitivity.size, + st->sensitivity.unit_expo, + val1, val2); + } + + return IIO_VAL_INT_PLUS_MICRO; +} +EXPORT_SYMBOL(hid_sensor_read_raw_hyst_value); + +int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st, + int val1, int val2) +{ + s32 value; + int ret; + + if (val1 < 0 || val2 < 0) + return -EINVAL; + + value = convert_to_vtf_format(st->sensitivity.size, + st->sensitivity.unit_expo, + val1, val2); + ret = sensor_hub_set_feature(st->hsdev, st->sensitivity.report_id, + st->sensitivity.index, sizeof(value), + &value); + if (ret < 0 || value < 0) + return -EINVAL; + + ret = sensor_hub_get_feature(st->hsdev, + st->sensitivity.report_id, + st->sensitivity.index, sizeof(value), + &value); + if (ret < 0 || value < 0) + return -EINVAL; + + st->raw_hystersis = value; + + return 0; +} +EXPORT_SYMBOL(hid_sensor_write_raw_hyst_value); + +/* + * This fuction applies the unit exponent to the scale. + * For example: + * 9.806650000 ->exp:2-> val0[980]val1[665000000] + * 9.000806000 ->exp:2-> val0[900]val1[80600000] + * 0.174535293 ->exp:2-> val0[17]val1[453529300] + * 1.001745329 ->exp:0-> val0[1]val1[1745329] + * 1.001745329 ->exp:2-> val0[100]val1[174532900] + * 1.001745329 ->exp:4-> val0[10017]val1[453290000] + * 9.806650000 ->exp:-2-> val0[0]val1[98066500] + */ +static void adjust_exponent_nano(int *val0, int *val1, int scale0, + int scale1, int exp) +{ + int divisor; + int i; + int x; + int res; + int rem; + + if (exp > 0) { + *val0 = scale0 * int_pow(10, exp); + res = 0; + if (exp > 9) { + *val1 = 0; + return; + } + for (i = 0; i < exp; ++i) { + divisor = int_pow(10, 8 - i); + x = scale1 / divisor; + res += int_pow(10, exp - 1 - i) * x; + scale1 = scale1 % divisor; + } + *val0 += res; + *val1 = scale1 * int_pow(10, exp); + } else if (exp < 0) { + exp = abs(exp); + if (exp > 9) { + *val0 = *val1 = 0; + return; + } + divisor = int_pow(10, exp); + *val0 = scale0 / divisor; + rem = scale0 % divisor; + res = 0; + for (i = 0; i < (9 - exp); ++i) { + divisor = int_pow(10, 8 - i); + x = scale1 / divisor; + res += int_pow(10, 8 - exp - i) * x; + scale1 = scale1 % divisor; + } + *val1 = rem * int_pow(10, 9 - exp) + res; + } else { + *val0 = scale0; + *val1 = scale1; + } +} + +int hid_sensor_format_scale(u32 usage_id, + struct hid_sensor_hub_attribute_info *attr_info, + int *val0, int *val1) +{ + int i; + int exp; + + *val0 = 1; + *val1 = 0; + + for (i = 0; i < ARRAY_SIZE(unit_conversion); ++i) { + if (unit_conversion[i].usage_id == usage_id && + unit_conversion[i].unit == attr_info->units) { + exp = hid_sensor_convert_exponent( + attr_info->unit_expo); + adjust_exponent_nano(val0, val1, + unit_conversion[i].scale_val0, + unit_conversion[i].scale_val1, exp); + break; + } + } + + return IIO_VAL_INT_PLUS_NANO; +} +EXPORT_SYMBOL(hid_sensor_format_scale); + +int64_t hid_sensor_convert_timestamp(struct hid_sensor_common *st, + int64_t raw_value) +{ + return st->timestamp_ns_scale * raw_value; +} +EXPORT_SYMBOL(hid_sensor_convert_timestamp); + +static +int hid_sensor_get_reporting_interval(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_common *st) +{ + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_REPORT_INTERVAL, + &st->poll); + /* Default unit of measure is milliseconds */ + if (st->poll.units == 0) + st->poll.units = HID_USAGE_SENSOR_UNITS_MILLISECOND; + + st->poll_interval = -1; + + return 0; + +} + +static void hid_sensor_get_report_latency_info(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_common *st) +{ + sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, + usage_id, + HID_USAGE_SENSOR_PROP_REPORT_LATENCY, + &st->report_latency); + + hid_dbg(hsdev->hdev, "Report latency attributes: %x:%x\n", + st->report_latency.index, st->report_latency.report_id); +} + +int hid_sensor_get_report_latency(struct hid_sensor_common *st) +{ + int ret; + int value; + + ret = sensor_hub_get_feature(st->hsdev, st->report_latency.report_id, + st->report_latency.index, sizeof(value), + &value); + if (ret < 0) + return ret; + + return value; +} +EXPORT_SYMBOL(hid_sensor_get_report_latency); + +int hid_sensor_set_report_latency(struct hid_sensor_common *st, int latency_ms) +{ + return sensor_hub_set_feature(st->hsdev, st->report_latency.report_id, + st->report_latency.index, + sizeof(latency_ms), &latency_ms); +} +EXPORT_SYMBOL(hid_sensor_set_report_latency); + +bool hid_sensor_batch_mode_supported(struct hid_sensor_common *st) +{ + return st->report_latency.index > 0 && st->report_latency.report_id > 0; +} +EXPORT_SYMBOL(hid_sensor_batch_mode_supported); + +int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_common *st) +{ + + struct hid_sensor_hub_attribute_info timestamp; + s32 value; + int ret; + + hid_sensor_get_reporting_interval(hsdev, usage_id, st); + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_REPORT_STATE, + &st->report_state); + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROY_POWER_STATE, + &st->power_state); + + st->power_state.logical_minimum = 1; + st->report_state.logical_minimum = 1; + + sensor_hub_input_get_attribute_info(hsdev, + HID_FEATURE_REPORT, usage_id, + HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS, + &st->sensitivity); + + st->raw_hystersis = -1; + + sensor_hub_input_get_attribute_info(hsdev, + HID_INPUT_REPORT, usage_id, + HID_USAGE_SENSOR_TIME_TIMESTAMP, + ×tamp); + if (timestamp.index >= 0 && timestamp.report_id) { + int val0, val1; + + hid_sensor_format_scale(HID_USAGE_SENSOR_TIME_TIMESTAMP, + ×tamp, &val0, &val1); + st->timestamp_ns_scale = val0; + } else + st->timestamp_ns_scale = 1000000000; + + hid_sensor_get_report_latency_info(hsdev, usage_id, st); + + hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x %x:%x\n", + st->poll.index, st->poll.report_id, + st->report_state.index, st->report_state.report_id, + st->power_state.index, st->power_state.report_id, + st->sensitivity.index, st->sensitivity.report_id, + timestamp.index, timestamp.report_id); + + ret = sensor_hub_get_feature(hsdev, + st->power_state.report_id, + st->power_state.index, sizeof(value), &value); + if (ret < 0) + return ret; + if (value < 0) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL(hid_sensor_parse_common_attributes); + +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_DESCRIPTION("HID Sensor common attribute processing"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c new file mode 100644 index 000000000..ff375790b --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -0,0 +1,336 @@ +// 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/trigger.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/buffer.h> +#include <linux/iio/sysfs.h> +#include "hid-sensor-trigger.h" + +static ssize_t _hid_sensor_set_report_latency(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int integer, fract, ret; + int latency; + + ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); + if (ret) + return ret; + + latency = integer * 1000 + fract / 1000; + ret = hid_sensor_set_report_latency(attrb, latency); + if (ret < 0) + return len; + + attrb->latency_ms = hid_sensor_get_report_latency(attrb); + + return len; +} + +static ssize_t _hid_sensor_get_report_latency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int latency; + + latency = hid_sensor_get_report_latency(attrb); + if (latency < 0) + return latency; + + return sprintf(buf, "%d.%06u\n", latency / 1000, (latency % 1000) * 1000); +} + +static ssize_t _hid_sensor_get_fifo_state(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int latency; + + latency = hid_sensor_get_report_latency(attrb); + if (latency < 0) + return latency; + + return sprintf(buf, "%d\n", !!latency); +} + +static IIO_DEVICE_ATTR(hwfifo_timeout, 0644, + _hid_sensor_get_report_latency, + _hid_sensor_set_report_latency, 0); +static IIO_DEVICE_ATTR(hwfifo_enabled, 0444, + _hid_sensor_get_fifo_state, NULL, 0); + +static const struct attribute *hid_sensor_fifo_attributes[] = { + &iio_dev_attr_hwfifo_timeout.dev_attr.attr, + &iio_dev_attr_hwfifo_enabled.dev_attr.attr, + NULL, +}; + +static void hid_sensor_setup_batch_mode(struct iio_dev *indio_dev, + struct hid_sensor_common *st) +{ + if (!hid_sensor_batch_mode_supported(st)) + return; + + iio_buffer_set_attrs(indio_dev->buffer, hid_sensor_fifo_attributes); +} + +static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) +{ + int state_val; + int report_val; + s32 poll_value = 0; + + if (state) { + if (sensor_hub_device_open(st->hsdev)) + return -EIO; + + atomic_inc(&st->data_ready); + + state_val = hid_sensor_get_usage_index(st->hsdev, + st->power_state.report_id, + st->power_state.index, + HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM); + report_val = hid_sensor_get_usage_index(st->hsdev, + st->report_state.report_id, + st->report_state.index, + HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM); + + poll_value = hid_sensor_read_poll_value(st); + } else { + int val; + + val = atomic_dec_if_positive(&st->data_ready); + if (val < 0) + return 0; + + sensor_hub_device_close(st->hsdev); + state_val = hid_sensor_get_usage_index(st->hsdev, + st->power_state.report_id, + st->power_state.index, + HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM); + report_val = hid_sensor_get_usage_index(st->hsdev, + st->report_state.report_id, + st->report_state.index, + HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM); + } + + if (state_val >= 0) { + state_val += st->power_state.logical_minimum; + sensor_hub_set_feature(st->hsdev, st->power_state.report_id, + st->power_state.index, sizeof(state_val), + &state_val); + } + + if (report_val >= 0) { + report_val += st->report_state.logical_minimum; + sensor_hub_set_feature(st->hsdev, st->report_state.report_id, + st->report_state.index, + sizeof(report_val), + &report_val); + } + + pr_debug("HID_SENSOR %s set power_state %d report_state %d\n", + st->pdev->name, state_val, report_val); + + sensor_hub_get_feature(st->hsdev, st->power_state.report_id, + st->power_state.index, + sizeof(state_val), &state_val); + if (state && poll_value) + msleep_interruptible(poll_value * 2); + + return 0; +} +EXPORT_SYMBOL(hid_sensor_power_state); + +int hid_sensor_power_state(struct hid_sensor_common *st, bool state) +{ + +#ifdef CONFIG_PM + int ret; + + if (atomic_add_unless(&st->runtime_pm_enable, 1, 1)) + pm_runtime_enable(&st->pdev->dev); + + if (state) { + atomic_inc(&st->user_requested_state); + ret = pm_runtime_get_sync(&st->pdev->dev); + } else { + atomic_dec(&st->user_requested_state); + pm_runtime_mark_last_busy(&st->pdev->dev); + pm_runtime_use_autosuspend(&st->pdev->dev); + ret = pm_runtime_put_autosuspend(&st->pdev->dev); + } + if (ret < 0) { + if (state) + pm_runtime_put_noidle(&st->pdev->dev); + return ret; + } + + return 0; +#else + atomic_set(&st->user_requested_state, state); + return _hid_sensor_power_state(st, state); +#endif +} + +static void hid_sensor_set_power_work(struct work_struct *work) +{ + struct hid_sensor_common *attrb = container_of(work, + struct hid_sensor_common, + work); + + if (attrb->poll_interval >= 0) + sensor_hub_set_feature(attrb->hsdev, attrb->poll.report_id, + attrb->poll.index, + sizeof(attrb->poll_interval), + &attrb->poll_interval); + + if (attrb->raw_hystersis >= 0) + sensor_hub_set_feature(attrb->hsdev, + attrb->sensitivity.report_id, + attrb->sensitivity.index, + sizeof(attrb->raw_hystersis), + &attrb->raw_hystersis); + + if (attrb->latency_ms > 0) + hid_sensor_set_report_latency(attrb, attrb->latency_ms); + + if (atomic_read(&attrb->user_requested_state)) + _hid_sensor_power_state(attrb, true); +} + +static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state); +} + +void hid_sensor_remove_trigger(struct iio_dev *indio_dev, + struct hid_sensor_common *attrb) +{ + if (atomic_read(&attrb->runtime_pm_enable)) + pm_runtime_disable(&attrb->pdev->dev); + + pm_runtime_set_suspended(&attrb->pdev->dev); + pm_runtime_put_noidle(&attrb->pdev->dev); + + cancel_work_sync(&attrb->work); + iio_trigger_unregister(attrb->trigger); + iio_trigger_free(attrb->trigger); + iio_triggered_buffer_cleanup(indio_dev); +} +EXPORT_SYMBOL(hid_sensor_remove_trigger); + +static const struct iio_trigger_ops hid_sensor_trigger_ops = { + .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state, +}; + +int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, + struct hid_sensor_common *attrb) +{ + int ret; + struct iio_trigger *trig; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + NULL, NULL); + if (ret) { + dev_err(&indio_dev->dev, "Triggered Buffer Setup Failed\n"); + return ret; + } + + trig = iio_trigger_alloc("%s-dev%d", name, indio_dev->id); + if (trig == NULL) { + dev_err(&indio_dev->dev, "Trigger Allocate Failed\n"); + ret = -ENOMEM; + goto error_triggered_buffer_cleanup; + } + + trig->dev.parent = indio_dev->dev.parent; + iio_trigger_set_drvdata(trig, attrb); + trig->ops = &hid_sensor_trigger_ops; + ret = iio_trigger_register(trig); + + if (ret) { + dev_err(&indio_dev->dev, "Trigger Register Failed\n"); + goto error_free_trig; + } + attrb->trigger = trig; + indio_dev->trig = iio_trigger_get(trig); + + hid_sensor_setup_batch_mode(indio_dev, attrb); + + ret = pm_runtime_set_active(&indio_dev->dev); + if (ret) + goto error_unreg_trigger; + + iio_device_set_drvdata(indio_dev, attrb); + + INIT_WORK(&attrb->work, hid_sensor_set_power_work); + + pm_suspend_ignore_children(&attrb->pdev->dev, true); + /* Default to 3 seconds, but can be changed from sysfs */ + pm_runtime_set_autosuspend_delay(&attrb->pdev->dev, + 3000); + return ret; +error_unreg_trigger: + iio_trigger_unregister(trig); +error_free_trig: + iio_trigger_free(trig); +error_triggered_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); + return ret; +} +EXPORT_SYMBOL(hid_sensor_setup_trigger); + +static int __maybe_unused hid_sensor_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + + return _hid_sensor_power_state(attrb, false); +} + +static int __maybe_unused hid_sensor_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + schedule_work(&attrb->work); + return 0; +} + +static int __maybe_unused hid_sensor_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + return _hid_sensor_power_state(attrb, true); +} + +const struct dev_pm_ops hid_sensor_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume) + SET_RUNTIME_PM_OPS(hid_sensor_suspend, + hid_sensor_runtime_resume, NULL) +}; +EXPORT_SYMBOL(hid_sensor_pm_ops); + +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); +MODULE_DESCRIPTION("HID Sensor trigger processing"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h new file mode 100644 index 000000000..bb45cc89e --- /dev/null +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * HID Sensors Driver + * Copyright (c) 2012, Intel Corporation. + */ +#ifndef _HID_SENSOR_TRIGGER_H +#define _HID_SENSOR_TRIGGER_H + +#include <linux/pm.h> +#include <linux/pm_runtime.h> + +extern const struct dev_pm_ops hid_sensor_pm_ops; + +int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, + struct hid_sensor_common *attrb); +void hid_sensor_remove_trigger(struct iio_dev *indio_dev, + struct hid_sensor_common *attrb); +int hid_sensor_power_state(struct hid_sensor_common *st, bool state); + +#endif |