003 File Manager
Current Path:
/usr/src/sys/dev/iicbus
usr
/
src
/
sys
/
dev
/
iicbus
/
📁
..
📄
acpi_iicbus.c
(20.59 KB)
📄
ad7417.c
(14.78 KB)
📄
ad7418.c
(6.34 KB)
📄
adm1030.c
(5.78 KB)
📄
ads111x.c
(17.29 KB)
📄
adt746x.c
(16.94 KB)
📄
ds1307.c
(10.9 KB)
📄
ds1307reg.h
(2.4 KB)
📄
ds13rtc.c
(15.63 KB)
📄
ds1631.c
(9.81 KB)
📄
ds1672.c
(4.88 KB)
📄
ds1775.c
(6.87 KB)
📄
ds3231.c
(15.47 KB)
📄
ds3231reg.h
(2.9 KB)
📁
gpio
📄
htu21.c
(11.65 KB)
📄
icee.c
(9.6 KB)
📄
if_ic.c
(9.72 KB)
📄
iic.c
(11.45 KB)
📄
iic.h
(2.54 KB)
📄
iic_recover_bus.c
(4.64 KB)
📄
iic_recover_bus.h
(2.21 KB)
📄
iicbb.c
(14.06 KB)
📄
iicbb_if.m
(2.3 KB)
📄
iicbus.c
(9.91 KB)
📄
iicbus.h
(3.68 KB)
📄
iicbus_if.m
(3.13 KB)
📄
iichid.c
(32.26 KB)
📄
iicoc.c
(6.56 KB)
📄
iicoc.h
(3.59 KB)
📄
iicoc_fdt.c
(4.97 KB)
📄
iicoc_pci.c
(4.02 KB)
📄
iiconf.c
(14.68 KB)
📄
iiconf.h
(6.33 KB)
📄
iicsmb.c
(11.36 KB)
📄
isl12xx.c
(10.75 KB)
📄
lm75.c
(13.44 KB)
📄
max6690.c
(10.11 KB)
📁
mux
📄
nxprtc.c
(29.39 KB)
📄
ofw_iicbus.c
(6.91 KB)
📁
pmic
📁
rtc
📄
rtc8583.c
(7.61 KB)
📄
s35390a.c
(9.57 KB)
📄
sy8106a.c
(6.96 KB)
📄
syr827.c
(7.66 KB)
📁
twsi
Editing: ad7418.c
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2006 Sam Leffler. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); /* * Analog Devices AD7418 chip sitting on the I2C bus. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/module.h> #include <sys/bus.h> #include <sys/sysctl.h> #include <sys/sx.h> #include <dev/iicbus/iiconf.h> #include "iicbus_if.h" #define IIC_M_WR 0 /* write operation */ #define AD7418_ADDR 0x50 /* slave address */ #define AD7418_TEMP 0 /* Temperature Value (r/o) */ #define AD7418_CONF 1 /* Config Register (r/w) */ #define AD7418_CONF_SHUTDOWN 0x01 #define AD7418_CONF_CHAN 0xe0 /* channel select mask */ #define AD7418_CHAN_TEMP 0x00 /* temperature channel */ #define AD7418_CHAN_VOLT 0x80 /* voltage channel */ #define AD7418_THYST 2 /* Thyst Setpoint (r/o) */ #define AD7418_TOTI 3 /* Toti Setpoint */ #define AD7418_VOLT 4 /* ADC aka Voltage (r/o) */ #define AD7418_CONF2 5 /* Config2 Register (r/w) */ struct ad7418_softc { device_t sc_dev; struct sx sc_lock; int sc_curchan; /* current channel */ int sc_curtemp; int sc_curvolt; int sc_lastupdate; /* in ticks */ }; static void ad7418_update(struct ad7418_softc *); static int ad7418_read_1(device_t dev, int reg); static int ad7418_write_1(device_t dev, int reg, int v); static int ad7418_probe(device_t dev) { /* XXX really probe? */ device_set_desc(dev, "Analog Devices AD7418 ADC"); return (BUS_PROBE_NOWILDCARD); } static int ad7418_sysctl_temp(SYSCTL_HANDLER_ARGS) { struct ad7418_softc *sc = arg1; int temp; sx_xlock(&sc->sc_lock); ad7418_update(sc); temp = (sc->sc_curtemp / 64) * 25; sx_xunlock(&sc->sc_lock); return sysctl_handle_int(oidp, &temp, 0, req); } static int ad7418_sysctl_voltage(SYSCTL_HANDLER_ARGS) { struct ad7418_softc *sc = arg1; int volt; sx_xlock(&sc->sc_lock); ad7418_update(sc); volt = (sc->sc_curvolt >> 6) * 564 / 10; sx_xunlock(&sc->sc_lock); return sysctl_handle_int(oidp, &volt, 0, req); } static int ad7418_attach(device_t dev) { struct ad7418_softc *sc = device_get_softc(dev); struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev); struct sysctl_oid *tree = device_get_sysctl_tree(dev); int conf; sc->sc_dev = dev; sc->sc_lastupdate = ticks - hz; sx_init(&sc->sc_lock, "ad7418"); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "temp", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0, ad7418_sysctl_temp, "I", "operating temperature"); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "volt", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0, ad7418_sysctl_voltage, "I", "input voltage"); /* enable chip if configured in shutdown mode */ conf = ad7418_read_1(dev, AD7418_CONF); if (conf >= 0 && (conf & AD7418_CONF_SHUTDOWN)) ad7418_write_1(dev, AD7418_CONF, conf &~ AD7418_CONF_SHUTDOWN); return (0); } static int ad7418_read_1(device_t dev, int reg) { uint8_t addr = reg; uint8_t data[1]; struct iic_msg msgs[2] = { { AD7418_ADDR, IIC_M_WR, 1, &addr }, { AD7418_ADDR, IIC_M_RD, 1, data }, }; return iicbus_transfer(dev, msgs, 2) != 0 ? -1 : data[0]; } static int ad7418_write_1(device_t dev, int reg, int v) { /* NB: register pointer precedes actual data */ uint8_t data[2]; struct iic_msg msgs[1] = { { AD7418_ADDR, IIC_M_WR, 2, data }, }; data[0] = reg; data[1] = v & 0xff; return iicbus_transfer(dev, msgs, 1); } static void ad7418_set_channel(struct ad7418_softc *sc, int chan) { if (sc->sc_curchan == chan) return; ad7418_write_1(sc->sc_dev, AD7418_CONF, (ad7418_read_1(sc->sc_dev, AD7418_CONF) &~ AD7418_CONF_CHAN)|chan); sc->sc_curchan = chan; #if 0 /* * NB: Linux driver delays here but chip data sheet * says nothing and things appear to work fine w/o * a delay on channel change. */ /* let channel change settle, 1 tick should be 'nuf (need ~1ms) */ tsleep(sc, 0, "ad7418", hz/1000); #endif } static int ad7418_read_2(device_t dev, int reg) { uint8_t addr = reg; uint8_t data[2]; struct iic_msg msgs[2] = { { AD7418_ADDR, IIC_M_WR, 1, &addr }, { AD7418_ADDR, IIC_M_RD, 2, data }, }; /* NB: D15..D8 precede D7..D0 per data sheet (Fig 12) */ return iicbus_transfer(dev, msgs, 2) != 0 ? -1 : ((data[0] << 8) | data[1]); } static void ad7418_update(struct ad7418_softc *sc) { int v; sx_assert(&sc->sc_lock, SA_XLOCKED); /* NB: no point in updating any faster than the chip */ if (ticks - sc->sc_lastupdate > hz) { ad7418_set_channel(sc, AD7418_CHAN_TEMP); v = ad7418_read_2(sc->sc_dev, AD7418_TEMP); if (v >= 0) sc->sc_curtemp = v; ad7418_set_channel(sc, AD7418_CHAN_VOLT); v = ad7418_read_2(sc->sc_dev, AD7418_VOLT); if (v >= 0) sc->sc_curvolt = v; sc->sc_lastupdate = ticks; } } static device_method_t ad7418_methods[] = { DEVMETHOD(device_probe, ad7418_probe), DEVMETHOD(device_attach, ad7418_attach), DEVMETHOD_END }; static driver_t ad7418_driver = { "ad7418", ad7418_methods, sizeof(struct ad7418_softc), }; static devclass_t ad7418_devclass; DRIVER_MODULE(ad7418, iicbus, ad7418_driver, ad7418_devclass, 0, 0); MODULE_VERSION(ad7418, 1); MODULE_DEPEND(ad7418, iicbus, 1, 1, 1);
Upload File
Create Folder