361 lines
8.7 KiB
C
361 lines
8.7 KiB
C
|
/*-
|
||
|
|
* Copyright (c) 2015 Michael Gmelin <freebsd@grem.de>
|
||
|
|
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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("$FreeBSD$");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Driver for intersil I2C ISL29018 Digital Ambient Light Sensor and Proximity
|
||
|
|
* Sensor with Interrupt Function, only tested connected over SMBus (ig4iic).
|
||
|
|
*
|
||
|
|
* Datasheet:
|
||
|
|
* http://www.intersil.com/en/products/optoelectronics/ambient-light-and-proximity-sensors/light-to-digital-sensors/ISL29018.html
|
||
|
|
* http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29018.pdf
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <sys/bus.h>
|
||
|
|
#include <sys/conf.h>
|
||
|
|
#include <sys/event.h>
|
||
|
|
#include <sys/fcntl.h>
|
||
|
|
#include <sys/kernel.h>
|
||
|
|
#include <sys/lock.h>
|
||
|
|
#include <sys/lockmgr.h>
|
||
|
|
#include <sys/malloc.h>
|
||
|
|
#include <sys/mbuf.h>
|
||
|
|
#include <sys/module.h>
|
||
|
|
#include <sys/poll.h>
|
||
|
|
#include <sys/sx.h>
|
||
|
|
#include <sys/sysctl.h>
|
||
|
|
#include <sys/systm.h>
|
||
|
|
#include <sys/systm.h>
|
||
|
|
#include <sys/uio.h>
|
||
|
|
#include <sys/vnode.h>
|
||
|
|
|
||
|
|
#include <dev/smbus/smbconf.h>
|
||
|
|
#include <dev/smbus/smbus.h>
|
||
|
|
#include <dev/isl/isl.h>
|
||
|
|
|
||
|
|
#include "smbus_if.h"
|
||
|
|
#include "bus_if.h"
|
||
|
|
#include "device_if.h"
|
||
|
|
|
||
|
|
#define ISL_METHOD_ALS 0x10
|
||
|
|
#define ISL_METHOD_IR 0x11
|
||
|
|
#define ISL_METHOD_PROX 0x12
|
||
|
|
#define ISL_METHOD_RESOLUTION 0x13
|
||
|
|
#define ISL_METHOD_RANGE 0x14
|
||
|
|
|
||
|
|
struct isl_softc {
|
||
|
|
device_t dev;
|
||
|
|
int unit;
|
||
|
|
int addr;
|
||
|
|
|
||
|
|
struct sx isl_sx;
|
||
|
|
struct sysctl_ctx_list *sysctl_ctx;
|
||
|
|
struct sysctl_oid *sysctl_tree;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Returns < 0 on problem. */
|
||
|
|
static int isl_read_sensor(device_t dev, int addr, uint8_t cmd_mask);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Initialize the device
|
||
|
|
*/
|
||
|
|
static
|
||
|
|
int
|
||
|
|
init_device(device_t dev, int addr, int probe)
|
||
|
|
{
|
||
|
|
static char bl_init[] = { 0x00 };
|
||
|
|
|
||
|
|
device_t bus;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
bus = device_get_parent(dev); /* smbus */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* init procedure: send 0x00 to test ref and cmd reg 1
|
||
|
|
*/
|
||
|
|
error = smbus_trans(bus, addr, REG_TEST,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
bl_init, sizeof(bl_init), NULL, 0, NULL);
|
||
|
|
if (error)
|
||
|
|
goto done;
|
||
|
|
|
||
|
|
error = smbus_trans(bus, addr, REG_CMD1,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
bl_init, sizeof(bl_init), NULL, 0, NULL);
|
||
|
|
if (error)
|
||
|
|
goto done;
|
||
|
|
|
||
|
|
pause("islinit", hz/100);
|
||
|
|
|
||
|
|
done:
|
||
|
|
if (error)
|
||
|
|
device_printf(dev, "Unable to initialize\n");
|
||
|
|
return (error);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isl_probe(device_t);
|
||
|
|
static int isl_attach(device_t);
|
||
|
|
static int isl_detach(device_t);
|
||
|
|
|
||
|
|
static int isl_sysctl(SYSCTL_HANDLER_ARGS);
|
||
|
|
|
||
|
|
static devclass_t isl_devclass;
|
||
|
|
|
||
|
|
static device_method_t isl_methods[] = {
|
||
|
|
/* device interface */
|
||
|
|
DEVMETHOD(device_probe, isl_probe),
|
||
|
|
DEVMETHOD(device_attach, isl_attach),
|
||
|
|
DEVMETHOD(device_detach, isl_detach),
|
||
|
|
|
||
|
|
DEVMETHOD_END
|
||
|
|
};
|
||
|
|
|
||
|
|
static driver_t isl_driver = {
|
||
|
|
"isl",
|
||
|
|
isl_methods,
|
||
|
|
sizeof(struct isl_softc),
|
||
|
|
};
|
||
|
|
|
||
|
|
static int
|
||
|
|
isl_probe(device_t dev)
|
||
|
|
{
|
||
|
|
int unit;
|
||
|
|
int addr;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
addr = smbus_get_addr(dev);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 0x44 - isl ambient light sensor on the acer c720.
|
||
|
|
* (other devices might use other ids).
|
||
|
|
*/
|
||
|
|
if (addr != 0x44)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
unit = device_get_unit(dev);
|
||
|
|
|
||
|
|
error = init_device(dev, addr, 1);
|
||
|
|
if (error)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
device_set_desc(dev, "ISL Digital Ambient Light Sensor");
|
||
|
|
|
||
|
|
return (BUS_PROBE_VENDOR);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
isl_attach(device_t dev)
|
||
|
|
{
|
||
|
|
struct isl_softc *sc;
|
||
|
|
int unit;
|
||
|
|
int addr;
|
||
|
|
int use_als;
|
||
|
|
int use_ir;
|
||
|
|
int use_prox;
|
||
|
|
|
||
|
|
sc = device_get_softc(dev);
|
||
|
|
|
||
|
|
if (!sc)
|
||
|
|
return (ENOMEM);
|
||
|
|
|
||
|
|
unit = device_get_unit(dev);
|
||
|
|
addr = *((unsigned char*) device_get_ivars(dev));
|
||
|
|
|
||
|
|
if (init_device(dev, addr, 0))
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
sx_init(&sc->isl_sx, "ISL read lock");
|
||
|
|
|
||
|
|
sc->dev = dev;
|
||
|
|
sc->unit = unit;
|
||
|
|
sc->addr = addr;
|
||
|
|
|
||
|
|
sc->sysctl_ctx = device_get_sysctl_ctx(dev);
|
||
|
|
sc->sysctl_tree = device_get_sysctl_tree(dev);
|
||
|
|
|
||
|
|
use_als = isl_read_sensor(dev, addr, CMD1_MASK_ALS_ONCE) >= 0;
|
||
|
|
use_ir = isl_read_sensor(dev, addr, CMD1_MASK_IR_ONCE) >= 0;
|
||
|
|
use_prox = isl_read_sensor(dev, addr, CMD1_MASK_PROX_ONCE) >= 0;
|
||
|
|
|
||
|
|
if (use_als) {
|
||
|
|
SYSCTL_ADD_PROC(sc->sysctl_ctx,
|
||
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
|
||
|
|
"als", CTLTYPE_INT | CTLFLAG_RD,
|
||
|
|
sc, ISL_METHOD_ALS, isl_sysctl, "I",
|
||
|
|
"Current ALS sensor read-out");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (use_ir) {
|
||
|
|
SYSCTL_ADD_PROC(sc->sysctl_ctx,
|
||
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
|
||
|
|
"ir", CTLTYPE_INT | CTLFLAG_RD,
|
||
|
|
sc, ISL_METHOD_IR, isl_sysctl, "I",
|
||
|
|
"Current IR sensor read-out");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (use_prox) {
|
||
|
|
SYSCTL_ADD_PROC(sc->sysctl_ctx,
|
||
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
|
||
|
|
"prox", CTLTYPE_INT | CTLFLAG_RD,
|
||
|
|
sc, ISL_METHOD_PROX, isl_sysctl, "I",
|
||
|
|
"Current proximity sensor read-out");
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCTL_ADD_PROC(sc->sysctl_ctx,
|
||
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
|
||
|
|
"resolution", CTLTYPE_INT | CTLFLAG_RD,
|
||
|
|
sc, ISL_METHOD_RESOLUTION, isl_sysctl, "I",
|
||
|
|
"Current proximity sensor resolution");
|
||
|
|
|
||
|
|
SYSCTL_ADD_PROC(sc->sysctl_ctx,
|
||
|
|
SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
|
||
|
|
"range", CTLTYPE_INT | CTLFLAG_RD,
|
||
|
|
sc, ISL_METHOD_RANGE, isl_sysctl, "I",
|
||
|
|
"Current proximity sensor range");
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
isl_detach(device_t dev)
|
||
|
|
{
|
||
|
|
struct isl_softc *sc;
|
||
|
|
|
||
|
|
sc = device_get_softc(dev);
|
||
|
|
sx_destroy(&sc->isl_sx);
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
isl_sysctl(SYSCTL_HANDLER_ARGS)
|
||
|
|
{
|
||
|
|
static int resolutions[] = { 16, 12, 8, 4};
|
||
|
|
static int ranges[] = { 1000, 4000, 16000, 64000};
|
||
|
|
|
||
|
|
struct isl_softc *sc;
|
||
|
|
device_t bus;
|
||
|
|
uint8_t rbyte;
|
||
|
|
int arg;
|
||
|
|
int resolution;
|
||
|
|
int range;
|
||
|
|
|
||
|
|
sc = (struct isl_softc *)oidp->oid_arg1;
|
||
|
|
arg = -1;
|
||
|
|
|
||
|
|
sx_xlock(&sc->isl_sx);
|
||
|
|
bus = device_get_parent(sc->dev); /* smbus */
|
||
|
|
if (smbus_trans(bus, sc->addr, REG_CMD2,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
|
||
|
|
sx_xunlock(&sc->isl_sx);
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
resolution = resolutions[(rbyte & CMD2_MASK_RESOLUTION)
|
||
|
|
>> CMD2_SHIFT_RESOLUTION];
|
||
|
|
range = ranges[(rbyte & CMD2_MASK_RANGE) >> CMD2_SHIFT_RANGE];
|
||
|
|
|
||
|
|
switch (oidp->oid_arg2) {
|
||
|
|
case ISL_METHOD_ALS:
|
||
|
|
arg = (isl_read_sensor(sc->dev, sc->addr,
|
||
|
|
CMD1_MASK_ALS_ONCE) * range) >> resolution;
|
||
|
|
break;
|
||
|
|
case ISL_METHOD_IR:
|
||
|
|
arg = isl_read_sensor(sc->dev, sc->addr,
|
||
|
|
CMD1_MASK_IR_ONCE);
|
||
|
|
break;
|
||
|
|
case ISL_METHOD_PROX:
|
||
|
|
arg = isl_read_sensor(sc->dev, sc->addr,
|
||
|
|
CMD1_MASK_PROX_ONCE);
|
||
|
|
break;
|
||
|
|
case ISL_METHOD_RESOLUTION:
|
||
|
|
arg = (1 << resolution);
|
||
|
|
break;
|
||
|
|
case ISL_METHOD_RANGE:
|
||
|
|
arg = range;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
sx_xunlock(&sc->isl_sx);
|
||
|
|
|
||
|
|
SYSCTL_OUT(req, &arg, sizeof(arg));
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int isl_read_sensor(device_t dev, int addr, uint8_t cmd_mask)
|
||
|
|
{
|
||
|
|
device_t bus;
|
||
|
|
uint8_t rbyte;
|
||
|
|
uint8_t cmd;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
bus = device_get_parent(dev); /* smbus */
|
||
|
|
|
||
|
|
if (smbus_trans(bus, addr, REG_CMD1,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
|
||
|
|
device_printf(dev,
|
||
|
|
"Couldn't read first byte before issuing command %d\n",
|
||
|
|
cmd_mask);
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
cmd = (rbyte & 0x1f) | cmd_mask;
|
||
|
|
if (smbus_trans(bus, addr, REG_CMD1,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
&cmd, sizeof(cmd), NULL, 0, NULL)) {
|
||
|
|
device_printf(dev, "Couldn't write command %d\n", cmd_mask);
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
pause("islconv", hz/10);
|
||
|
|
|
||
|
|
if (smbus_trans(bus, addr, REG_DATA1,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
|
||
|
|
device_printf(dev,
|
||
|
|
"Couldn't read first byte after command %d\n", cmd_mask);
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = rbyte;
|
||
|
|
if (smbus_trans(bus, addr, REG_DATA2,
|
||
|
|
SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
|
||
|
|
NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
|
||
|
|
device_printf(dev, "Couldn't read second byte after command %d\n", cmd_mask);
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
ret += rbyte << 8;
|
||
|
|
|
||
|
|
return (ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
DRIVER_MODULE(isl, smbus, isl_driver, isl_devclass, NULL, NULL);
|
||
|
|
MODULE_DEPEND(isl, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
|
||
|
|
MODULE_VERSION(isl, 1);
|