276 lines
6.2 KiB
C
276 lines
6.2 KiB
C
/*-
|
|
* Copyright (c) 1998 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.
|
|
*
|
|
* $Id: smb.c,v 1.10 1999/05/08 21:59:08 dfr Exp $
|
|
*
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/fcntl.h>
|
|
|
|
#include <machine/clock.h>
|
|
|
|
#include <dev/smbus/smbconf.h>
|
|
#include <dev/smbus/smbus.h>
|
|
#include <machine/smb.h>
|
|
|
|
#include "smbus_if.h"
|
|
|
|
#define BUFSIZE 1024
|
|
|
|
struct smb_softc {
|
|
|
|
int sc_addr; /* address on smbus */
|
|
int sc_count; /* >0 if device opened */
|
|
|
|
char *sc_cp; /* output buffer pointer */
|
|
|
|
char sc_buffer[BUFSIZE]; /* output buffer */
|
|
char sc_inbuf[BUFSIZE]; /* input buffer */
|
|
};
|
|
|
|
#define IIC_SOFTC(unit) \
|
|
((struct smb_softc *)devclass_get_softc(smb_devclass, (unit)))
|
|
|
|
#define IIC_DEVICE(unit) \
|
|
(devclass_get_device(smb_devclass, (unit)))
|
|
|
|
static int smb_probe(device_t);
|
|
static int smb_attach(device_t);
|
|
|
|
static devclass_t smb_devclass;
|
|
|
|
static device_method_t smb_methods[] = {
|
|
/* device interface */
|
|
DEVMETHOD(device_probe, smb_probe),
|
|
DEVMETHOD(device_attach, smb_attach),
|
|
|
|
/* smbus interface */
|
|
DEVMETHOD(smbus_intr, smbus_generic_intr),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t smb_driver = {
|
|
"smb",
|
|
smb_methods,
|
|
sizeof(struct smb_softc),
|
|
};
|
|
|
|
static d_open_t smbopen;
|
|
static d_close_t smbclose;
|
|
static d_write_t smbwrite;
|
|
static d_read_t smbread;
|
|
static d_ioctl_t smbioctl;
|
|
|
|
#define CDEV_MAJOR 106
|
|
static struct cdevsw smb_cdevsw =
|
|
{ smbopen, smbclose, smbread, smbwrite, /*106*/
|
|
smbioctl, nullstop, nullreset, nodevtotty, /*smb*/
|
|
seltrue, nommap, nostrat, "smb", NULL, -1 };
|
|
|
|
/*
|
|
* smbprobe()
|
|
*/
|
|
static int
|
|
smb_probe(device_t dev)
|
|
{
|
|
struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev);
|
|
|
|
sc->sc_addr = smbus_get_addr(dev);
|
|
|
|
/* XXX detect chip with start/stop conditions */
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* smbattach()
|
|
*/
|
|
static int
|
|
smb_attach(device_t dev)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smbopen (dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
struct smb_softc *sc = IIC_SOFTC(minor(dev));
|
|
|
|
if (!sc)
|
|
return (EINVAL);
|
|
|
|
if (sc->sc_count)
|
|
return (EBUSY);
|
|
|
|
sc->sc_count++;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smbclose(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
struct smb_softc *sc = IIC_SOFTC(minor(dev));
|
|
|
|
if (!sc)
|
|
return (EINVAL);
|
|
|
|
if (!sc->sc_count)
|
|
return (EINVAL);
|
|
|
|
sc->sc_count--;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smbwrite(dev_t dev, struct uio * uio, int ioflag)
|
|
{
|
|
/* not supported */
|
|
|
|
return (ENODEV);
|
|
}
|
|
|
|
static int
|
|
smbread(dev_t dev, struct uio * uio, int ioflag)
|
|
{
|
|
/* not supported */
|
|
|
|
return (ENODEV);
|
|
}
|
|
|
|
static int
|
|
smbioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
|
|
{
|
|
device_t smbdev = IIC_DEVICE(minor(dev));
|
|
struct smb_softc *sc = IIC_SOFTC(minor(dev));
|
|
device_t parent = device_get_parent(smbdev);
|
|
|
|
int error = 0;
|
|
struct smbcmd *s = (struct smbcmd *)data;
|
|
|
|
if (!sc || !s)
|
|
return (EINVAL);
|
|
|
|
/* allocate the bus */
|
|
if ((error = smbus_request_bus(parent, smbdev,
|
|
(flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR))))
|
|
return (error);
|
|
|
|
switch (cmd) {
|
|
case SMB_QUICK_WRITE:
|
|
error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE));
|
|
break;
|
|
|
|
case SMB_QUICK_READ:
|
|
error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD));
|
|
break;
|
|
|
|
case SMB_SENDB:
|
|
error = smbus_error(smbus_sendb(parent, s->slave, s->cmd));
|
|
break;
|
|
|
|
case SMB_RECVB:
|
|
error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd));
|
|
break;
|
|
|
|
case SMB_WRITEB:
|
|
error = smbus_error(smbus_writeb(parent, s->slave, s->cmd,
|
|
s->data.byte));
|
|
break;
|
|
|
|
case SMB_WRITEW:
|
|
error = smbus_error(smbus_writew(parent, s->slave,
|
|
s->cmd, s->data.word));
|
|
break;
|
|
|
|
case SMB_READB:
|
|
if (s->data.byte_ptr)
|
|
error = smbus_error(smbus_readb(parent, s->slave,
|
|
s->cmd, s->data.byte_ptr));
|
|
break;
|
|
|
|
case SMB_READW:
|
|
if (s->data.word_ptr)
|
|
error = smbus_error(smbus_readw(parent, s->slave,
|
|
s->cmd, s->data.word_ptr));
|
|
break;
|
|
|
|
case SMB_PCALL:
|
|
if (s->data.process.rdata)
|
|
error = smbus_error(smbus_pcall(parent, s->slave, s->cmd,
|
|
s->data.process.sdata, s->data.process.rdata));
|
|
break;
|
|
|
|
case SMB_BWRITE:
|
|
if (s->count && s->data.byte_ptr)
|
|
error = smbus_error(smbus_bwrite(parent, s->slave,
|
|
s->cmd, s->count, s->data.byte_ptr));
|
|
break;
|
|
|
|
case SMB_BREAD:
|
|
if (s->count && s->data.byte_ptr)
|
|
error = smbus_error(smbus_bread(parent, s->slave,
|
|
s->cmd, s->count, s->data.byte_ptr));
|
|
break;
|
|
|
|
default:
|
|
error = ENODEV;
|
|
}
|
|
|
|
/* release the bus */
|
|
smbus_release_bus(parent, smbdev);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int smb_devsw_installed = 0;
|
|
|
|
static void
|
|
smb_drvinit(void *unused)
|
|
{
|
|
dev_t dev;
|
|
|
|
if( ! smb_devsw_installed ) {
|
|
dev = makedev(CDEV_MAJOR,0);
|
|
cdevsw_add(&dev,&smb_cdevsw,NULL);
|
|
smb_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
DEV_DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, CDEV_MAJOR, NOMAJ,
|
|
smb_cdevsw, 0, 0);
|
|
|
|
SYSINIT(smbdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,smb_drvinit,NULL)
|