165 lines
4.5 KiB
C
165 lines
4.5 KiB
C
/*-
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* Copyright (c) 1998 Nicolas Souchu
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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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* $Id: smbus.c,v 1.1.1.1 1998/09/03 20:52:54 nsouch Exp $
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <dev/smbus/smbconf.h>
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#include <dev/smbus/smbus.h>
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/*
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* Autoconfiguration and support routines for the Philips serial I2C bus
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*/
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#define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev))
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/*
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* structure used to attach devices to the I2C bus
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*/
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struct smbus_device {
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const char *smbd_name; /* device name */
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const u_char smbd_addr; /* address of the device */
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const char *smbd_desc; /* device descriptor */
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};
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/*
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* list of known devices
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*/
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struct smbus_device smbus_children[] = {
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#if 0
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{ "smb", 0, "General Call" },
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#endif
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{ NULL, 0 }
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};
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static devclass_t smbus_devclass;
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/*
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* Device methods
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*/
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static int smbus_probe(device_t);
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static int smbus_attach(device_t);
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static void smbus_print_child(device_t, device_t);
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static int smbus_read_ivar(device_t , device_t, int, u_long *);
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static device_method_t smbus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, smbus_probe),
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DEVMETHOD(device_attach, smbus_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* bus interface */
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DEVMETHOD(bus_print_child, smbus_print_child),
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DEVMETHOD(bus_read_ivar, smbus_read_ivar),
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DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
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DEVMETHOD(bus_create_intr, bus_generic_create_intr),
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DEVMETHOD(bus_connect_intr, bus_generic_connect_intr),
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{ 0, 0 }
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};
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static driver_t smbus_driver = {
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"smbus",
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smbus_methods,
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DRIVER_TYPE_MISC,
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sizeof(struct smbus_softc),
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};
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/*
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* At 'probe' time, we add all the devices which we know about to the
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* bus. The generic attach routine will probe and attach them if they
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* are alive.
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*/
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static int
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smbus_probe(device_t dev)
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{
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device_set_desc(dev, "System Management Bus");
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return (0);
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}
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static int
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smbus_attach(device_t dev)
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{
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struct smbus_device *smbdev;
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device_t child;
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char byte;
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u_short addr;
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bus_generic_attach(dev);
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#if 0
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printf("Probing for devices on smbus%d:\n", device_get_unit(dev));
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/* probe known devices */
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for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) {
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child = device_add_child(dev, smbdev->smbd_name, -1, smbdev);
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device_set_desc(child, smbdev->smbd_desc);
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}
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#endif
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return (0);
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}
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void
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smbus_generic_intr(device_t dev, u_char devaddr, char low, char high)
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{
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return;
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}
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static void
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smbus_print_child(device_t bus, device_t dev)
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{
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struct smbus_device* smbdev = DEVTOSMBUS(dev);
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printf(" on %s%d addr 0x%x", device_get_name(bus),
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device_get_unit(bus), smbdev->smbd_addr);
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return;
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}
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static int
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smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result)
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{
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struct smbus_device* smbdev = DEVTOSMBUS(dev);
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switch (index) {
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case SMBUS_IVAR_ADDR:
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*result = smbdev->smbd_addr;
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break;
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}
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return (ENOENT);
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}
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DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0);
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DRIVER_MODULE(smbus, bti2c, smbus_driver, smbus_devclass, 0, 0);
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