0ede21322e
Also addresses jhb's remarks on D2811 and D3068. PR: 202059 Differential Revision: https://reviews.freebsd.org/D3351 Reviewed by: jhb Approved by: jhb
354 lines
8.5 KiB
C
354 lines
8.5 KiB
C
/*-
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* Copyright (c) 2015 Michael Gmelin <freebsd@grem.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Driver for intersil I2C ISL29018 Digital Ambient Light Sensor and Proximity
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* Sensor with Interrupt Function, only tested connected over SMBus (ig4iic).
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*
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* Datasheet:
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* http://www.intersil.com/en/products/optoelectronics/ambient-light-and-proximity-sensors/light-to-digital-sensors/ISL29018.html
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* http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29018.pdf
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*/
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/event.h>
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#include <sys/fcntl.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/lockmgr.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/poll.h>
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#include <sys/sx.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#include <dev/smbus/smbconf.h>
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#include <dev/smbus/smbus.h>
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#include <dev/isl/isl.h>
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#include "smbus_if.h"
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#include "bus_if.h"
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#include "device_if.h"
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#define ISL_METHOD_ALS 0x10
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#define ISL_METHOD_IR 0x11
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#define ISL_METHOD_PROX 0x12
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#define ISL_METHOD_RESOLUTION 0x13
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#define ISL_METHOD_RANGE 0x14
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struct isl_softc {
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device_t dev;
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int addr;
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struct sx isl_sx;
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};
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/* Returns < 0 on problem. */
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static int isl_read_sensor(device_t dev, int addr, uint8_t cmd_mask);
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/*
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* Initialize the device
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*/
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static int
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init_device(device_t dev, int addr, int probe)
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{
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static char bl_init[] = { 0x00 };
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device_t bus;
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int error;
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bus = device_get_parent(dev); /* smbus */
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/*
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* init procedure: send 0x00 to test ref and cmd reg 1
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*/
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error = smbus_trans(bus, addr, REG_TEST,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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bl_init, sizeof(bl_init), NULL, 0, NULL);
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if (error)
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goto done;
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error = smbus_trans(bus, addr, REG_CMD1,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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bl_init, sizeof(bl_init), NULL, 0, NULL);
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if (error)
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goto done;
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pause("islinit", hz/100);
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done:
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if (error)
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device_printf(dev, "Unable to initialize\n");
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return (error);
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}
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static int isl_probe(device_t);
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static int isl_attach(device_t);
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static int isl_detach(device_t);
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static int isl_sysctl(SYSCTL_HANDLER_ARGS);
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static devclass_t isl_devclass;
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static device_method_t isl_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, isl_probe),
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DEVMETHOD(device_attach, isl_attach),
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DEVMETHOD(device_detach, isl_detach),
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DEVMETHOD_END
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};
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static driver_t isl_driver = {
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"isl",
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isl_methods,
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sizeof(struct isl_softc),
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};
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static int
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isl_probe(device_t dev)
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{
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int addr;
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int error;
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addr = smbus_get_addr(dev);
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/*
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* 0x44 - isl ambient light sensor on the acer c720.
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* (other devices might use other ids).
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*/
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if (addr != 0x44)
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return (ENXIO);
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error = init_device(dev, addr, 1);
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if (error)
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return (ENXIO);
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device_set_desc(dev, "ISL Digital Ambient Light Sensor");
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return (BUS_PROBE_VENDOR);
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}
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static int
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isl_attach(device_t dev)
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{
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struct isl_softc *sc;
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struct sysctl_ctx_list *sysctl_ctx;
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struct sysctl_oid *sysctl_tree;
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int addr;
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int use_als;
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int use_ir;
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int use_prox;
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sc = device_get_softc(dev);
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if (!sc)
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return (ENOMEM);
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addr = smbus_get_addr(dev);
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if (init_device(dev, addr, 0))
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return (ENXIO);
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sx_init(&sc->isl_sx, "ISL read lock");
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sc->dev = dev;
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sc->addr = addr;
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sysctl_ctx = device_get_sysctl_ctx(dev);
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sysctl_tree = device_get_sysctl_tree(dev);
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use_als = isl_read_sensor(dev, addr, CMD1_MASK_ALS_ONCE) >= 0;
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use_ir = isl_read_sensor(dev, addr, CMD1_MASK_IR_ONCE) >= 0;
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use_prox = isl_read_sensor(dev, addr, CMD1_MASK_PROX_ONCE) >= 0;
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if (use_als) {
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SYSCTL_ADD_PROC(sysctl_ctx,
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SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"als", CTLTYPE_INT | CTLFLAG_RD,
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sc, ISL_METHOD_ALS, isl_sysctl, "I",
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"Current ALS sensor read-out");
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}
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if (use_ir) {
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SYSCTL_ADD_PROC(sysctl_ctx,
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SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"ir", CTLTYPE_INT | CTLFLAG_RD,
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sc, ISL_METHOD_IR, isl_sysctl, "I",
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"Current IR sensor read-out");
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}
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if (use_prox) {
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SYSCTL_ADD_PROC(sysctl_ctx,
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SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"prox", CTLTYPE_INT | CTLFLAG_RD,
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sc, ISL_METHOD_PROX, isl_sysctl, "I",
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"Current proximity sensor read-out");
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}
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SYSCTL_ADD_PROC(sysctl_ctx,
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SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"resolution", CTLTYPE_INT | CTLFLAG_RD,
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sc, ISL_METHOD_RESOLUTION, isl_sysctl, "I",
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"Current proximity sensor resolution");
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SYSCTL_ADD_PROC(sysctl_ctx,
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SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"range", CTLTYPE_INT | CTLFLAG_RD,
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sc, ISL_METHOD_RANGE, isl_sysctl, "I",
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"Current proximity sensor range");
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return (0);
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}
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static int
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isl_detach(device_t dev)
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{
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struct isl_softc *sc;
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sc = device_get_softc(dev);
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sx_destroy(&sc->isl_sx);
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return (0);
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}
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static int
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isl_sysctl(SYSCTL_HANDLER_ARGS)
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{
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static int resolutions[] = { 16, 12, 8, 4};
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static int ranges[] = { 1000, 4000, 16000, 64000};
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struct isl_softc *sc;
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device_t bus;
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uint8_t rbyte;
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int arg;
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int resolution;
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int range;
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sc = (struct isl_softc *)oidp->oid_arg1;
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arg = -1;
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sx_xlock(&sc->isl_sx);
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bus = device_get_parent(sc->dev); /* smbus */
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if (smbus_trans(bus, sc->addr, REG_CMD2,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
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sx_xunlock(&sc->isl_sx);
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return (-1);
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}
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resolution = resolutions[(rbyte & CMD2_MASK_RESOLUTION)
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>> CMD2_SHIFT_RESOLUTION];
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range = ranges[(rbyte & CMD2_MASK_RANGE) >> CMD2_SHIFT_RANGE];
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switch (oidp->oid_arg2) {
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case ISL_METHOD_ALS:
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arg = (isl_read_sensor(sc->dev, sc->addr,
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CMD1_MASK_ALS_ONCE) * range) >> resolution;
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break;
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case ISL_METHOD_IR:
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arg = isl_read_sensor(sc->dev, sc->addr,
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CMD1_MASK_IR_ONCE);
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break;
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case ISL_METHOD_PROX:
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arg = isl_read_sensor(sc->dev, sc->addr,
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CMD1_MASK_PROX_ONCE);
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break;
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case ISL_METHOD_RESOLUTION:
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arg = (1 << resolution);
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break;
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case ISL_METHOD_RANGE:
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arg = range;
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break;
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}
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sx_xunlock(&sc->isl_sx);
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SYSCTL_OUT(req, &arg, sizeof(arg));
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return (0);
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}
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static int
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isl_read_sensor(device_t dev, int addr, uint8_t cmd_mask)
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{
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device_t bus;
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uint8_t rbyte;
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uint8_t cmd;
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int ret;
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bus = device_get_parent(dev); /* smbus */
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if (smbus_trans(bus, addr, REG_CMD1,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
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device_printf(dev,
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"Couldn't read first byte before issuing command %d\n",
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cmd_mask);
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return (-1);
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}
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cmd = (rbyte & 0x1f) | cmd_mask;
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if (smbus_trans(bus, addr, REG_CMD1,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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&cmd, sizeof(cmd), NULL, 0, NULL)) {
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device_printf(dev, "Couldn't write command %d\n", cmd_mask);
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return (-1);
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}
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pause("islconv", hz/10);
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if (smbus_trans(bus, addr, REG_DATA1,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
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device_printf(dev,
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"Couldn't read first byte after command %d\n", cmd_mask);
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return (-1);
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}
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ret = rbyte;
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if (smbus_trans(bus, addr, REG_DATA2,
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SMB_TRANS_NOCNT | SMB_TRANS_7BIT,
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NULL, 0, &rbyte, sizeof(rbyte), NULL)) {
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device_printf(dev, "Couldn't read second byte after command %d\n", cmd_mask);
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return (-1);
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}
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ret += rbyte << 8;
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return (ret);
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}
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DRIVER_MODULE(isl, smbus, isl_driver, isl_devclass, NULL, NULL);
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MODULE_DEPEND(isl, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
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MODULE_VERSION(isl, 1);
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