87e31f4b90
device_add_child_ordered(). 'ivars' may now be set using the device_set_ivars() function. This makes it easier for us to change how arbitrary data structures are associated with a device_t. Eventually we won't be modifying device_t to add additional pointers for ivars, softc data etc. Despite my best efforts I've probably forgotten something so let me know if this breaks anything. I've been running with this change for months and its been quite involved actually isolating all the changes from the rest of the local changes in my tree. Reviewed by: peter, dfr
152 lines
4.1 KiB
C
152 lines
4.1 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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* $FreeBSD$
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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 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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{ "smb", "SMBus general purpose I/O" },
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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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#if 0
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static int smbus_read_ivar(device_t , device_t, int, u_long *);
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#endif
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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, bus_generic_print_child),
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DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
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DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
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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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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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/* add known devices */
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for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) {
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device_t child;
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if (devclass_find(smbdev->smbd_name)) {
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child = device_add_child(dev, smbdev->smbd_name, -1);
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device_set_ivars(child, smbdev);
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device_set_desc(child, smbdev->smbd_desc);
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} else if (bootverbose)
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printf("smbus: %s devclass not found\n",
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smbdev->smbd_name);
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}
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bus_generic_attach(dev);
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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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#if 0
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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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default:
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break;
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}
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return (ENOENT);
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}
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#endif
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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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DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0);
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DRIVER_MODULE(smbus, alsmb, smbus_driver, smbus_devclass, 0, 0);
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