#include <sys/cdefs.h>
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/iicbus/iicbus.h>
#include <dev/iicbus/iiconf.h>

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Data Structures
struct	htu21_softc

Macros
#define	HTU21_ADDR 0x40

#define	HTU21_GET_TEMP 0xe3

#define	HTU21_GET_HUM 0xe5

#define	HTU21_GET_TEMP_NH 0xf3

#define	HTU21_GET_HUM_NH 0xf5

#define	HTU21_WRITE_CFG 0xe6

#define	HTU21_READ_CFG 0xe7

#define	HTU21_RESET 0xfe

#define	HTU2x_SERIAL0_0 0xfa

#define	HTU2x_SERIAL0_1 0x0f

#define	HTU2x_SERIAL1_0 0xfc

#define	HTU2x_SERIAL1_1 0xc9

Functions
	__FBSDID ("$FreeBSD$")

static uint8_t	calc_crc (uint16_t data)

static int	check_crc_16 (const uint8_t *data, uint8_t expected)

static int	check_crc_8 (const uint8_t data, uint8_t expected)

static int	htu21_get_measurement (device_t dev, uint8_t cmd, uint8_t *data, int count)

static int	htu21_get_measurement_nohold (device_t dev, uint8_t cmd, uint8_t *data, int count)

static int	htu21_temp_sysctl (SYSCTL_HANDLER_ARGS)

static int	htu21_rh_sysctl (SYSCTL_HANDLER_ARGS)

static int	htu21_get_cfg (device_t dev, uint8_t *cfg)

static int	htu21_set_cfg (device_t dev, uint8_t cfg)

static int	htu21_heater_sysctl (SYSCTL_HANDLER_ARGS)

static int	htu21_power_sysctl (SYSCTL_HANDLER_ARGS)

static int	htu21_get_serial (device_t dev)

static void	htu21_start (void *arg)

static int	htu21_probe (device_t dev)

static int	htu21_attach (device_t dev)

static int	htu21_detach (device_t dev)

	DRIVER_MODULE (htu21, iicbus, htu21_driver, htu21_devclass, 0, 0)

	MODULE_DEPEND (htu21, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER)

	MODULE_VERSION (htu21, 1)

	IICBUS_FDT_PNP_INFO (compat_data)

Variables
static device_method_t	htu21_methods []

static driver_t	htu21_driver

static devclass_t	htu21_devclass

Macro Definition Documentation

◆ HTU21_ADDR

#define HTU21_ADDR 0x40

Definition at line 61 of file htu21.c.

◆ HTU21_GET_HUM

#define HTU21_GET_HUM 0xe5

Definition at line 64 of file htu21.c.

◆ HTU21_GET_HUM_NH

#define HTU21_GET_HUM_NH 0xf5

Definition at line 66 of file htu21.c.

◆ HTU21_GET_TEMP

#define HTU21_GET_TEMP 0xe3

Definition at line 63 of file htu21.c.

◆ HTU21_GET_TEMP_NH

#define HTU21_GET_TEMP_NH 0xf3

Definition at line 65 of file htu21.c.

◆ HTU21_READ_CFG

#define HTU21_READ_CFG 0xe7

Definition at line 68 of file htu21.c.

◆ HTU21_RESET

#define HTU21_RESET 0xfe

Definition at line 69 of file htu21.c.

◆ HTU21_WRITE_CFG

#define HTU21_WRITE_CFG 0xe6

Definition at line 67 of file htu21.c.

◆ HTU2x_SERIAL0_0

#define HTU2x_SERIAL0_0 0xfa

Definition at line 71 of file htu21.c.

◆ HTU2x_SERIAL0_1

#define HTU2x_SERIAL0_1 0x0f

Definition at line 72 of file htu21.c.

◆ HTU2x_SERIAL1_0

#define HTU2x_SERIAL1_0 0xfc

Definition at line 73 of file htu21.c.

◆ HTU2x_SERIAL1_1

#define HTU2x_SERIAL1_1 0xc9

Definition at line 74 of file htu21.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ calc_crc()

static uint8_t calc_crc ( uint16_t data )

static

Definition at line 92 of file htu21.c.

References data.

Referenced by check_crc_16(), and check_crc_8().

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◆ check_crc_16()

static int check_crc_16	(	const uint8_t *	data,
		uint8_t	expected
	)

static

Definition at line 108 of file htu21.c.

References calc_crc(), and data.

Referenced by htu21_get_serial(), htu21_rh_sysctl(), and htu21_temp_sysctl().

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◆ check_crc_8()

static int check_crc_8	(	const uint8_t	data,
		uint8_t	expected
	)

static

Definition at line 117 of file htu21.c.

References calc_crc(), and data.

Referenced by htu21_get_serial().

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◆ DRIVER_MODULE()

DRIVER_MODULE	(	htu21	,
		iicbus	,
		htu21_driver	,
		htu21_devclass	,
		0	,
		0
	)

◆ htu21_attach()

static int htu21_attach ( device_t dev )

static

Definition at line 487 of file htu21.c.

References dev, htu21_start(), htu21_softc::sc_addr, and htu21_softc::sc_dev.

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◆ htu21_detach()

static int htu21_detach ( device_t dev )

static

Definition at line 504 of file htu21.c.

◆ htu21_get_cfg()

static int htu21_get_cfg	(	device_t	dev,
		uint8_t *	cfg
	)

static

Definition at line 255 of file htu21.c.

References iic_msg::buf, dev, iic_msg::flags, HTU21_READ_CFG, IIC_INTRWAIT, IIC_M_NOSTOP, IIC_M_RD, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, msgs, htu21_softc::sc_addr, and iic_msg::slave.

Referenced by htu21_heater_sysctl(), and htu21_power_sysctl().

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◆ htu21_get_measurement()

static int htu21_get_measurement	(	device_t	dev,
		uint8_t	cmd,
		uint8_t *	data,
		int	count
	)

static

Definition at line 126 of file htu21.c.

References iic_msg::buf, data, dev, iic_msg::flags, IIC_INTRWAIT, IIC_M_NOSTOP, IIC_M_RD, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, msgs, htu21_softc::sc_addr, and iic_msg::slave.

Referenced by htu21_rh_sysctl(), and htu21_temp_sysctl().

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◆ htu21_get_measurement_nohold()

static int htu21_get_measurement_nohold	(	device_t	dev,
		uint8_t	cmd,
		uint8_t *	data,
		int	count
	)

static

Definition at line 149 of file htu21.c.

References iic_msg::buf, data, dev, iic_msg::flags, IIC_ENOACK, IIC_INTRWAIT, IIC_M_RD, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, msgs, htu21_softc::sc_addr, and iic_msg::slave.

Referenced by htu21_rh_sysctl(), and htu21_temp_sysctl().

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◆ htu21_get_serial()

static int htu21_get_serial ( device_t dev )

static

Definition at line 348 of file htu21.c.

References iic_msg::buf, check_crc_16(), check_crc_8(), data, dev, iic_msg::flags, HTU2x_SERIAL0_0, HTU2x_SERIAL0_1, HTU2x_SERIAL1_0, HTU2x_SERIAL1_1, IIC_INTRWAIT, IIC_M_NOSTOP, IIC_M_RD, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, msgs, htu21_softc::sc_addr, htu21_softc::sc_serial, and iic_msg::slave.

Referenced by htu21_start().

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◆ htu21_heater_sysctl()

static int htu21_heater_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 301 of file htu21.c.

References dev, htu21_get_cfg(), and htu21_set_cfg().

Referenced by htu21_start().

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◆ htu21_power_sysctl()

static int htu21_power_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 326 of file htu21.c.

References dev, and htu21_get_cfg().

Referenced by htu21_start().

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◆ htu21_probe()

static int htu21_probe ( device_t dev )

static

Definition at line 462 of file htu21.c.

References addr, compat_data, dev, and HTU21_ADDR.

◆ htu21_rh_sysctl()

static int htu21_rh_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 220 of file htu21.c.

References check_crc_16(), dev, HTU21_GET_HUM, HTU21_GET_HUM_NH, htu21_get_measurement(), htu21_get_measurement_nohold(), htu21_softc::sc_errcount, and htu21_softc::sc_hold.

Referenced by htu21_start().

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◆ htu21_set_cfg()

static int htu21_set_cfg	(	device_t	dev,
		uint8_t	cfg
	)

static

Definition at line 280 of file htu21.c.

References iic_msg::buf, buf, dev, iic_msg::flags, HTU21_WRITE_CFG, IIC_INTRWAIT, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, htu21_softc::sc_addr, and iic_msg::slave.

Referenced by htu21_heater_sysctl().

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◆ htu21_start()

static void htu21_start ( void * arg )

static

Definition at line 412 of file htu21.c.

References dev, htu21_get_serial(), htu21_heater_sysctl(), htu21_power_sysctl(), htu21_rh_sysctl(), htu21_temp_sysctl(), htu21_softc::sc_dev, htu21_softc::sc_errcount, htu21_softc::sc_hold, and htu21_softc::sc_serial.

Referenced by htu21_attach().

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◆ htu21_temp_sysctl()

static int htu21_temp_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 185 of file htu21.c.

References check_crc_16(), dev, htu21_get_measurement(), htu21_get_measurement_nohold(), HTU21_GET_TEMP, HTU21_GET_TEMP_NH, htu21_softc::sc_errcount, and htu21_softc::sc_hold.

Referenced by htu21_start().

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◆ IICBUS_FDT_PNP_INFO()

IICBUS_FDT_PNP_INFO ( compat_data )

◆ MODULE_DEPEND()

MODULE_DEPEND	(	htu21	,
		iicbus	,
		IICBUS_MINVER	,
		IICBUS_PREFVER	,
		IICBUS_MAXVER
	)

◆ MODULE_VERSION()

MODULE_VERSION	(	htu21	,
		1
	)

Variable Documentation

◆ htu21_devclass

devclass_t htu21_devclass

static

Definition at line 524 of file htu21.c.

◆ htu21_driver

driver_t htu21_driver

static

Initial value:

= {
        "htu21",
        htu21_methods,
        sizeof(struct htu21_softc)
}

Definition at line 518 of file htu21.c.

◆ htu21_methods

device_method_t htu21_methods[]

static

Initial value:

= {
        
        DEVMETHOD(device_probe,         htu21_probe),
        DEVMETHOD(device_attach,        htu21_attach),
        DEVMETHOD(device_detach,        htu21_detach),
 
        DEVMETHOD_END
}

Definition at line 509 of file htu21.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ HTU21_ADDR

◆ HTU21_GET_HUM

◆ HTU21_GET_HUM_NH

◆ HTU21_GET_TEMP

◆ HTU21_GET_TEMP_NH

◆ HTU21_READ_CFG

◆ HTU21_RESET

◆ HTU21_WRITE_CFG

◆ HTU2x_SERIAL0_0

◆ HTU2x_SERIAL0_1

◆ HTU2x_SERIAL1_0

◆ HTU2x_SERIAL1_1

Function Documentation

◆ __FBSDID()

◆ calc_crc()

◆ check_crc_16()

◆ check_crc_8()

◆ DRIVER_MODULE()

◆ htu21_attach()

◆ htu21_detach()

◆ htu21_get_cfg()

◆ htu21_get_measurement()

◆ htu21_get_measurement_nohold()

◆ htu21_get_serial()

◆ htu21_heater_sysctl()

◆ htu21_power_sysctl()

◆ htu21_probe()

◆ htu21_rh_sysctl()

◆ htu21_set_cfg()

◆ htu21_start()

◆ htu21_temp_sysctl()

◆ IICBUS_FDT_PNP_INFO()

◆ MODULE_DEPEND()

◆ MODULE_VERSION()

Variable Documentation

◆ htu21_devclass

◆ htu21_driver

◆ htu21_methods