/*-
* Copyright (c) 1998, 2001 Nicolas Souchu
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <dev/smbus/smbconf.h>
#include <dev/smbus/smbus.h>
#include "smbus_if.h"
#include "bus_if.h"
/*
* Autoconfiguration and support routines for System Management bus
*/
/*
* Device methods
*/
static int smbus_probe(device_t);
static int smbus_attach(device_t);
static int smbus_detach(device_t);
static int smbus_child_location_str(device_t parent, device_t child,
char *buf, size_t buflen);
static int smbus_print_child(device_t parent, device_t child);
static void smbus_probe_device(device_t dev, u_char* addr);
static int smbus_read_ivar(device_t parent, device_t child, int which,
uintptr_t *result);
static device_method_t smbus_methods[] = {
/* device interface */
DEVMETHOD(device_probe, smbus_probe),
DEVMETHOD(device_attach, smbus_attach),
DEVMETHOD(device_detach, smbus_detach),
/* bus interface */
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_child_location_str, smbus_child_location_str),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
DEVMETHOD(bus_print_child, smbus_print_child),
DEVMETHOD(bus_read_ivar, smbus_read_ivar),
DEVMETHOD_END
};
driver_t smbus_driver = {
"smbus",
smbus_methods,
sizeof(struct smbus_softc),
};
devclass_t smbus_devclass;
/*
* At 'probe' time, we add all the devices which we know about to the
* bus. The generic attach routine will probe and attach them if they
* are alive.
*/
static int
smbus_probe(device_t dev)
{
device_set_desc(dev, "System Management Bus");
return (0);
}
static int
smbus_attach(device_t dev)
{
struct smbus_softc *sc = device_get_softc(dev);
unsigned char addr;
mtx_init(&sc->lock, device_get_nameunit(dev), "smbus", MTX_DEF);
bus_generic_probe(dev);
for (addr = SMBUS_ADDR_MIN; addr < SMBUS_ADDR_MAX; ++addr) {
sc->addrs[addr] = addr;
smbus_probe_device(dev, &sc->addrs[addr]);
}
bus_generic_attach(dev);
return (0);
}
static int
smbus_detach(device_t dev)
{
struct smbus_softc *sc = device_get_softc(dev);
int error;
error = bus_generic_detach(dev);
if (error)
return (error);
mtx_destroy(&sc->lock);
return (0);
}
void
smbus_generic_intr(device_t dev, u_char devaddr, char low, char high, int err)
{
}
static void
smbus_probe_device(device_t dev, u_char* addr)
{
device_t child;
int error;
u_char cmd;
u_char buf[2];
cmd = 0x01;
error = smbus_trans(dev, *addr, cmd,
SMB_TRANS_NOCNT | SMB_TRANS_NOREPORT,
NULL, 0, buf, 1, NULL);
if (error == 0) {
if (bootverbose)
device_printf(dev, "Probed address 0x%02x\n", *addr);
child = device_add_child(dev, NULL, -1);
device_set_ivars(child, addr);
}
}
static int
smbus_child_location_str(device_t parent, device_t child, char *buf,
size_t buflen)
{
unsigned char *addr;
addr = device_get_ivars(child);
if (addr)
snprintf(buf, buflen, "addr=0x%x", *addr);
else if (buflen)
buf[0] = 0;
return (0);
}
static int
smbus_print_child(device_t parent, device_t child)
{
unsigned char *addr;
int retval;
addr = device_get_ivars(child);
retval = bus_print_child_header(parent, child);
if (addr)
retval += printf(" at addr 0x%x", *addr);
retval += bus_print_child_footer(parent, child);
return (retval);
}
static int
smbus_read_ivar(device_t parent, device_t child, int which,
uintptr_t *result)
{
unsigned char *addr;
addr = device_get_ivars(child);
switch (which) {
case SMBUS_IVAR_ADDR:
*result = (addr == NULL) ? -1 : *addr;
break;
default:
return (ENOENT);
}
return (0);
}
MODULE_VERSION(smbus, SMBUS_MODVER);
